DE2538870A1 - PNEUMATIC-HYDRAULIC PUMP SYSTEM - Google Patents

Description

1 _# Moskovsky Aviatsionny Institut imeni Sergo Ordzhonikidze

2, Volzhskoe Obiedinenie po proizvodstvu legkovykh avtomobilei

PÜMPAETÄ S3

The main invention relates to the gablet mechanical engineering, namely pneumatic-hydraulic pump systems of adjustable power, as they are often used in production as sources of pressure for Hydraulic servomotors of production facilities are used wherever there is a broader range of working speeds and power in steep organs - those of welding equipment, machine tools, and rolling mills are less common Example given - are required

In particular, the exploitation of the invention would be m product ions © facilities for those at risk of radiation, explosions, prove hot and chemical production processes, i.e. working conditions that are not permissible for electrical control circuits

There are already pneumatic-hydraulic pumping systems (s. for example the USA patent 2858767, cl. 103-49) known ^: - v At least two pneumatic-hydraulic double-acting

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Have pressure transducers in such a way that the pressure chambers of each

-positioning corrugations Pne oma tlkzy linde rs over two two ν distributors with a Druokluf.tquelle and the respective Druckölräuaia via check valves with the hydraulic Druok- and Kuckte It ung m Are connected, with this pressure and BÜckleltung respectively Hydraulic 3t e Hay linder for production equipment connected becoming

In such pneumatic-hydraulic pumping systems

-stellungselner the two each pneumatic hydraulic pressure transformer ^v distributor comprises a cylindrical ski upper is, who takes the puncture of a control while the other Zwelstel-

lunggtf he plate is positively connected to the former,
ner llaehschleber formed ^v with both sliders in one and

the same distributor plate are installed

When pressure is applied to the control chamber of the piston valve , the flat valve is adjusted (due to the form fit) in one of the two end positions

Pumping systems consists in their relatively poor Fun2 & /. security, which has its cause in the following "

Ss is technically complicated, the compressed air leaks In the contact point between the flat slide and the body of the distributor plate without removing suitable seals, which considerably reduces the efficiency of the pumping system

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Since the control pistons are also mounted on one side, the compressed air in the relevant disturbance channel brings a significant amount Increase in the friction between the slide and the body of the distributor plate and thus the risk of the slide sticking with himself.

Among the disadvantages of the known pneumatic-hydraulic Pump systems also include the fact that the Hydraullk Druok pistons the pneumatic-hydraulic pressure transducers are of the type of differential coils and are therefore not capable of to ensure the greatest possible efficiency of the pumping system, because that's the hydraulic barn cylinders for production facilities when the piston is moving down, the pressure fluid volume is pressed is larger than that fed in when the piston goes up - so that the pumping system can be reversed more frequently Must, the efficiency of the pumping system drops and the life the duration of the production facilities was shortened

It must also be noted that the throttle holes in the Heads of the hydraulic pistons of the pneumatic-hydraulic pressure formers, duroh which the pressure fluid in the hydraulic Actuating cylinder comes under pressure during the downward movement of their Piston an additional pressure gradient across the hydraulic line, a heating of the hydraulic fluid, which also leads to a reduction in the efficiency of the pumping system and possibly the Use of a cooling system causes, i.e. J & higher operating costs makes necessary

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After all, the hydraulic ram is replenished the pneumatic-hydraulic pressure transducer with sioh moving upwards Bydraullk piston in the known pumping systems a check valve under the influence of the negative pressure in the hem the piston

At certain speeds (with high flow rates the hydraulic fluid) this can lead to the pressure oil chambers the pressure transducer will only be partially filled · The consequence of this is the possible "tearing off" of the pressure fluid in the hydraulic pressure line, which leads to disturbances in the operation of the pumping station

The purpose of the present invention is to resolve the listed Disadvantage·

The invention is based on the object of a pneumatic-hydraulic Pump installation with such a system of pneumatics— and hydraulic distributors, in which the compressed air ent deviation from the compressed air channels excluded, good speed of the pneumatic and hydraulic distributors achieved when reversing the pneumatic-hydraulic pressure transducers, the maximum stroke of your pistons up to the stop is ensured, a « inevitable filling of one pressure space of the respective Pressure transducer when displacing the hydraulic fluid from the realized another printing room, an even maximum consumption of hydraulic fluid against the hydraulic adjusting cylinder it is guaranteed if in the end it is permitted

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efficiency of the pumping system to increase its service life and its to ensure safe function during operation «

This task is solved daduroh, the bal a pneumatic-hydraulican Pump system that has at least two pneumatic-hydraulic double-acting pressure transducers, such as that the pressure air spaces of the respective pneumatic cylinder over

-position-

Zwel two ^ distributors with the compressed air connection and the respective Pressure oil chambers via check valves with the hydraulic Pressure and suction line are connected to the respectively hydraulic actuating cylinders for production straightening stomachs are connected, according to the invention, both two-position distributors are designed as cylindrical piston valves,

—Position—

the one two ^ 'manifold which punctures a control has, through its inlet with the compressed air source, via its outlet channels parallel to the compressed air spaces of the Pneumatic cylinder of the corresponding pneumatic-hydraulic

position pressure transducer and the control chambers of the other Zwtl ν. ver

is,

tellers ^v connected which takes over the function of a control and parallel old about his "outlet channels the control chambers

-position-

the first ^two-v manifold at the other pneumatischhydraulischen Druokumformor in communication, thereby * ranges is that the compressed air spaces of the two pneumatischhydraulischen pressure transducer source with the compressed air then communicate alternately, when the pistons in the in-Pneumatlkzyl

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the two pneuinatisoh-hydr a ul I pressure transducers move *, whereby the check valves become two Rückschlagventllbrückan four check valves are connected together and for balancing the flow rate of the hydraulic cylinders Actuating cylinders displaced a system flatly & kfiüsslgkelt is provided whose inlet connection to the same diagonals of the two bridge circuits lead, namely the one

oily

in which they also to the two pressure oil clearers of the two pneumatic-hydraulic pressure transducers are parallel, whereas the other two diagonals of the two setbacks ν unleash with ■; the hydraulic

Pressure and return lines are connected.

The control air instead of the form fit between the control and Zwelsteuerversteller as well as the bridge circuits and that Balancing system for the hydraulic actuating cylinder Displaced working fluid in the circuit structure of the pumping system almost exclude the compressed air from the compressed air rooms the pneumatic cylinder of the pneumatic-hydraulic Pressure transducers escape, allow the manifold to divide easier to design, prevent the power control valve from sticking

Schleber bti their pushing impossible and so improve the Functional reliability of the system as well as its efficiency

The system should also be equipped with two 3-way valves pneumatic actuation on one side and in the cylinder

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the wall of the pneumatic cylinder of both pneumatic-ljydraullschen Pressure transducers each with two rows of continuous radial boreholes ■; execute, in such a way that each of the holes in one marriage is bad a common channel with the control chamber, that of the other Eei communicate with the inlet of one of the above 3-way valves and the distance between both rows of radial holes, measured axially on the cylinder jacket of the pneumatic cylinder, to a phase shift between the two pistons of the pneumatic-hydraulic pressure transducer is adapted to those in the course of their movements only a minimal tent converges leaves·

In that dlo control air for the inlet of the respective Two-point distributor via a distributor channel of the 3-way valve is regularly switched through with one-sided pneumatic actuation, has an inevitable character, can now The entire stroke of the pressure piston of the pressure transducer can be used individually, in that the piston extends Isis to the stop and at this a fixed, the optimal phase shift The corresponding tent is guaranteed to linger between the two pistons This brings a better efficiency of the pumping system, a lower number of work cycles and a longer service life of the Aggregates with them

The fact that the compressed air spaces of the pneumatic cylinder of the respective pneumatic-hydraulic pressure transducer

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über br winü Heiko von continuous Radialbühruru ^ n alt.! am au £ -

a guided three-way valve and via dlesos and ν to ^ oschalteten 4 - .. ^! ek; e-7er tüller away miii dan Gteueikamriiorn des Lj? aftver tallers of the other pneumatiuch-hj \ xraali; jui: Uii Ji-uolcauif oi ¹ - me :: ü communicate, makes the pnoumatiüohen otauorkrois work faster, consequently improves the d ^ 'naiaisehen iioenachaftun of the ¹ pumping system · Dab al can make the holes themselves , the m löi ¹ Zylmder- '. vand auti ^ eapart are dimensioned so that they practically nichi boem-

The ojjtern to .adjust the Duüolifiußaense der Druckflusii ^ k-jit is built with viar unlockable RUcksohla ^ vuiitilen, which over their outlet connections each with one of the Druckölräame the pressure transducer are connected, their Steuerkamaorn in each case with the pressure oil level above the oejen same pressure converter, koauiu.nl., lox'on, vjobel dis mentioned controllable HÜckschlatjventlle over the common inlet with deiü outlet of a pneumatic-liydraulisuhon Druokölspoichers m Yorblndun ::; stand, who over his L'iniaß by a pneumatic Drucliba ^ rjnzungsvenli'll and a PneumatIk-Druckamdorar with the pressure release valve communicates.

./enn the pressure fluid from the cylinder chamber is the hydraulic Adjusting cylinder via the corresponding Xanal somes Hydraulilc-Vartellers into the vasseleltunc and then over a back .1 the hydraulic bridge circuit in don

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When the pressure oil chamber of each pressure transducer arrives, the balancing takes place automatically, the ¹ emeu volume arena same displaced & tan ikrbeltsflussi ^ kelt, by the corresponding drainable non-return valve by the pressure in 1 of one control line of the other, to the pressure line conveying pressure oil chamber ρ or jet ν ; ir do

üonit Qiit3t3hi; a connection from the clean pressurized room Qlnas Druclcuiaforciers aum pneumatlsch-lijd raulinc; -ian Draoköl- or from this to ^ enem. In the pnournatiachchuii Drackllüijsi.gkoi.tiaapelchor is always on from Overpressure originating from the compressed air network, it is also that Pressure fluid in the suction pressure oil chamber of a pressure transducer trα ibt. The other mali when namely out The actuator cylinder space on the cover side is displaced Hydraulic fluid from the blower line in the pneumatic-hydraulic lischen Drackölraua ^ e ^ promoted to the onerous pressure.

In the case of the equilibrium system for the flow rate of the displaced working fluid, the one pressure chamber of the pressure transducer is completely filled when the pressure fluid is displaced "Tearing off" of the pressure fluid flow in the pressure line eliminated ·

In a variant, the pneumatic-hydraulic

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BAD ORfQfNAL

2 * 38870 - ίο -

ise the arrangement is by «lnsn hydraulic

added to Gohan Druckuinloraier whose Hochdruckraun V '' out Ilydiciulik-Yo silent dec hydraulic Stollzyllnder parallol during which kolbenstangenseltiger and its deckeise iTiger space with the jusiaßanschlüasen sines iiydraulik- 4 - \ Vuije valve are connected _t the ait sumetn Emlaßkanälen to α mem automatic iie3elkrel3 for the pressure control of the working flü ^ v; ä} irend the operation of the .plant is connected _o

A soloha solution creates dia Ivlö ^ liüiiicoit, dio P with a higher degree of efficiency for welding, stamping, metalworking and aniora equipment, ie ? "

to the Baarbeltungsgut and the follow-up to the Stoiberung dor power on the hydraulic »stable cylinder, like as, for example is the case with multiple chipping and cutting pliers,

The said effect is made possible by the fact that the drive here with an automatic control loop for Jius control the pressure values for the pressure line represent pneumatic-hyd-'auiiachan The pumping system is provided with excess pressure The automatic Hegelkrexs for the pressure regulation are supposed to

Furthermore, a hydraulic-V7age-Yerteller with electrical adjustment include in such a way that sam Inbsvv · drainage channel with the hydraulic pressure resp. liüokieitung kosuiunliiert and

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BATH ^{0 ORKSINAL}

2 B

- rl -

imslaßkanälo au Hydrauiifclruckrüglarn lead, with the both pressure regulators work against non-return valve that work with

Your processes on a common line to the inlet doa Hydraulic 4-way adjuster with algktrischar actuation lie,

Constructed in this way shows the pneuraat-hydiauliüciia Pump system has better energetic data, and that's why the pneumatic-hydraulic pressure transducer Drackfluss.igicelt under a hydraulic barn cylinder for the xillfsbo ^ editions required. Pressure m feed the pressure line, in the listed Segelkreis, however, is a print for the special Stalgodor Power on the hydraulic barn cylinders produced

In another variant of the invention, the pneumatic-hydraulic pump system opens a hydraulic pressure transducer, the high pressure chamber of which communicates with the cylinder chambers on the top of the hydraulic cylinder, and so that it flows from the outlet channel of a hydraulic cylinder rs is separated by a üiitspci'rbardG EÜckschlagvoiitii, the outlet channel of which is connected to the said cylinder connection of the hydraulic distributor, the kingang channel of which lies parallel to the pressure chamber of the hydraulic actuating cylinder and the fluid pressure chamber of the hydraulic pressure converter and whose control line is connected to the other outlet of the named hydraulic distributor connected lst _c With such a solution to the problem are gin

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Efficiency and slightly lower manufacturing price of the The pumping system is pre-tied where it is necessary to hold the for a longer period of time St el! Cylinder under high pressure acts

This is because the leaking hydraulic

Devices hler from the Hoohdruckkrels separated and into the

are switched

hydraulic hie of the pressure line v there the hydraulic high pressure chamber of the hydraulic pressure transducer directly with the lid-like cylinder space of the hydraulic adjusting cylinder

is,
connected ^v on the other hand is separated from the hydraulic pressure line by a pilot operated check valve.

As a result, cheaper hydraulic units can now be used are used insofar as .sie · "? from the increased demands placed on the hydraulics High pressure area are removed «

The following is a detailed description of the export ungsvarianten of the invention with reference to belllegende Drawings given »in which.,» Own:

1 shows a basic circuit diagram of the pneumatic-hydraulic systems according to the invention Pumping system |

Flg. 2. One version (with the

an execution of the automatic control circuit for the high pressure on the hydraulic side) used in production facilities is used with clamping devices!

Flg. 3 the other variant of the automatic

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Conical circle for the high pressure on the hydraulic side

The pneumatic-hydraulic pump system has two double-acting pneumatic-hydraulic pressure transducers 1 and 2 (Fig »1)> each of which has a pneumatic cylinder with two compressed air spaces 1a, 1b, or. 2a, 2b and two adjoining them and pressure chambers 1c, 1d or 2c, 2d cooperating with them having.

The compressed air chambers 1a, 1b or 2a, 2b are each pneumatic-hydraulic Pressure transducers 1 or 2 are connected to the

-position-

Pressurized air source 3 through two two ν "distributors 4 and 5 or ·

6 and 7, but the printing spaces 1c, 1d or 2c, 2d are connected via check valves 8a, 8b, 8c and 8d or 9a, 9b, 9c

and 9d with the hydraulic pressure and buck line to which About a% draulik Ver teller 10 of the hydraulic cylinder 11 for the production facility is connected

.. - position—

According to the invention, the two ν are distributors 4, 5, 6 and

7 as a cylindrical slide with two control chambers 4a and 4b

(5a and 5b, 6a and 6b, 6a and 7b) formed »

—Position—
He has a two. ^ / distributor 4 or 6 of the

respective pair 4, 5 or 6, 7 the function of a control element and communicates via its inlet 4c or 6o, furthermore a pressure reducer 12 with the compressed air connection 3 and via the Outlet channels 4d and 4e or 6d and 6e parallel with the compressed air spaces 1a and 1b or 2a and 2b of the pneumatic cylinder of the

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pneumatic-hydraulic pressure transducer 1 or * 2 on the one hand and the control chambers 5a and 5b or 7a and 7b of the other two-point distributor 5 and 7 from the same two-point distributor pair 4, 5 or 6, 7 other rare

-stellmgs-The two ^v iSerteller 5 or ₀ 7 again takes over the

A control function and is connected via its two outlet 5d and 5e respectively · 7d and a .7 .an the control chambers 6a and 6b '-st'ellungs-

and 4b and 4a of the first two ^v manifold 6 and 4 of the, respectively

-position candars two. ^v 'distributor pair 6, 7 or · 4, 5 connected, whereby | is achieved that the compressed air chambers 1a, 1b or 2a, 2b of the pneumatic cylinders of the above-mentioned pressure transducers 1 and 2 communicate with the compressed air source alternately when their pistons 1e and 2e move

According to the invention each of the four check valves 8a, 8b, 8c, 8d or · 9a, 9b, 9c, with each 9d interconnected to a Ruckschlagventllbrücke Aa the corner points for which a bridge diagonal "ek" or · "θ'-ϊ" ¹ are the Pressure oil chambers 1c and 1d or 2c and 2d of the respective pneumatic- _{hydraulic pressure transducer 1 or e} 2, at those for the other Jtaückdiagonal "1-m" or "l '~ m ^{nt in} each case the hydraulic pressure and return, where the hydraulic cylinder 11 for the production facility is connected

The pumping system is also through a system for balancing the flow rate θ of the rooms from the cylinders 11a and 11b of the

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Hydraulic adjusting cylinder 11 for Pi'oduktxonsexnrichtung on advanced pressure fluid supplemented, such that its inlet connections lead to the points exner diagonal "ek" or "e'-k ™ each of the non-return valve bridges 8a-9d and 9a-9d. According to the invention ^{sxnd two 3 -7 / Q} S ^e -valves with one-sided pneumatic actuation have been added to the circuit structure of the pneumatic-hydraulic pump system · On the other hand, the pneumatic cylinder of each pneumatic-hydraulic pressure transducer 1,2 has two rows 1k and 1m, 2k and 2m of ■

through radial openings in the cylinder wall. Here, each of the holes 1k, 2k of Ginen Hclhe through a common channel with the CON & ammer 13a and 14a of the above third-vvege ¥ entlle 13 and 14, the holes 1m or 2Vx the other row with the Luftemlaß 13cb2w _e 14, c this

Valve 13 or 14 (1J or 14d sexn air outlet) connected. When selecting the distance between the two sexes 1k and 1m or 2k and 2m of the ". · ■ wheel loaf holes on the

Cylinder jacket of the corresponding pneumatic cylinder along the Generating one assumes a phase shift between the Eolben 1e, 2e of both pneumatic-hydraulic pressure transducers 1 and 2 in the course of their movement, which is optimal insofar as as they always run minimal tent together.

The balancing system for the flow rate of the displaced Hydraulic fluid can be released with four lockable hydraulic kickbacks "-

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valves 15, 16, 17 and 18 realized in such a way that each check valve with its corresponding connection in the communication line with one of the pressure spaces 1d, 1c, 2c, 2d one of the Pressure transducer 1, 2 is located, while the control lines to the Control chambers 155a, 16a, 17a, 18a of these hydraulic valves 15, 16 » 17 »18 from the opposite pressure oil chamber 1c or 1d or 2o or 2o respectively. 2d of the same pressure transducer 1 or 2 lead

Samllchi above lockable hydraulic non-return valves 15, 16, 17, 18 stand over a small inlet 19 with the outlet of the pneumatic-hydraulic pressure oil accumulator 20 in connection, the via its inlet 21 through a

Pnsumatik-DruckbQgrGnzuri £ üventll 22 and amen 3aeumatIk-Druckmmdorer 12 communicates with the compressed air source 3

In the variant (Fig. 2) of the pneumatic-hydraulic Pumping system, which is used for production with joanavorrlchtun "A" is intended, there is still ainan hydraulic pressure transducer 23 (Fig. 2), the high pressure chamber 23a paralloi with a Electrically operated hydraulic distributor 24 of the hydraulic Stellzylindar 25 »whose piston rod rare 2 ^ b and its ceiling in room 2 ^ c with the corresponding inlet

connections 26b and 25a of a hydraulic V2-way-Vejeteller 26, with its inlet channels 26c and 26d on an automatic Selecting IiegiXkrelß 27 for the pressure control of the working fluid the operation of the pumping system is connected

809814/0336

This is automatic before 2eselkrels 27 for pressure control the! hydraulic side of the running pumping system includes one Hydraulic n-way distributor 23 with electrical actuation on, its inlet channel 28a and outlet channel 28b. ....,* with

the hydraulic pressure or ^ ücklsltung 30 communicates, while its outlet channels 28c and 28d lead to the hydraulic pressure regulators 31 and 32.These pressure regulators are at the inlet connections of check valves 33 and 34, the common outlet to the inlet 25 <i of the hydraulic 4 -wöge- DistributorL 26 continued

^Ts Bai the following Varia the pneumatic-hydraulic pump system konuaunlslert the iiochdruckrauia ^ a. of a hydraulic pressure transducer 35 (Fig. 3) with the cover-side housing 35c of the hydraulic otellayllnder3 36 aa.d is the corresponding cylinder inlet channel 37a of a hydraulic distributor. y? separated by a releasable check valve $ Q , one inlet 38a of which for receiving the connecting line from the mentioned connection 37a of the Ilydraullk-Voi ¹ tollers y? serves, while the outlet channel 38b is parallel to the spaces 35b and 36c of the hydraulic actuating cylinder 35 and the Ilochdruckraum 3 ^ a das

hydraulic pressure converter 35 is connected, where the Control line of the check valve 38 to the other outlet

d
37 ^ of the hydraulic distributor 37 in connection.

How the pneumatic-hydraulic pump system works

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BATH ORIGINAL

is the following o

When the Pn ^ umatIk pressure reducing valve 12 is pressurized with the pressure from the compressed air network 3 Gj ¹ Ig · 1), the compressed air is at a standstill

-stellungsan dan serving as control valves two χ; ν distributors 4 and 6 of the two pairs of distributors 4, 5 and 6, 7. Thereby ^ the compressed air from the outlet ducts and then to the right pressure dreams 1b and 2b of the fheumatic cylinids of both pneumatic hydraulic tubes Druokuaforaer 1 and 2. The pistons of the Pneumatlkisylmder 3tahen quietly and are on the left «njasGiilaseii ·

The air chamber 1b of the pressure transducer 1 can now be taken through the bores 1k of a series of through-holes in the cylinder wall, the oteuerluft für die JJ '.-. / Ase-Yentll that enters its control chamber 13a _f as the compressed air is fed from the same compressed air space through the bores 1m of the other sieve to the air inlet 13b of the 3-way valve Compressed air then also for inclusion 13o on the Ci ^ on the side of the control valve 13 and then to the air inlet ^ c the second i / egeventils 5 with two switching positions from the distributor pair 4, 3 further *

The control compressed air from the üuslaßkanal 4c dos first Distributor 4 of the control chamber ^ b of the second distributor 5 of the

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BATH ORIGINAL

. - 19 -

same Vertellarpaars 4, 5 executed and move ^ this in the right Sohaltstellung, in which the air inlet 5c of the distributor 5 pending compressed air from its outlet 5o and further to the control chamber 6b of the distributor 6 of the other distributor pair 6, 7 £ ülangt

In the same way, the pressure released to the right becomes dream

2b of the Biaumatlkzyllndei-s of the pneumatic-hydraulic Biiackuaiforaisrs 2 signals formed by compressed air "obtained how they, at the two lines 2k and 2m of through holes in the cylinder wall of the said Eaeumatikzyinder s removed, accordingly to act on the control ammer 14a of the 3-age valve 14 and applying it to its vent for later use Conservation is required »

After actuation, the yoke valve 14 does not shut down one, in which the series of 2m through holes in the cylinder wall of the pneumatic cylinder of the pressure converter 2 outflowing compressed air passes through the directional control valve 14 to the connection 14c located on its gate side, which leads to the outlet duct 7e of the targeted distributor 7 of the distributor pair 6, 7 leads *

The transfer of the second distributor 7 of the distributor pair 6, 7 into the switching position on the right, in which the on Lufteln-IaS 7c of the distributor 7 pending compressed air free path to the corresponding connection 7e on its opposite side and welter to Control chamber 4a of distributor 4 of distributor pair £, 5

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BATH ORIGINAL

holds where it arrives as control air, takes place with de * activation

-position-

the control line connected to the line from connection 6e of the two ^ distributor 6 to the control chamber 7b of the distributor 7

Then there will be distributor 4 in the Sohalttolluns to the left (äoffläß Fit; · Ό controlled, where now its Smlaß 4d for the after left compressed air tree 1a of the iheumatic cylinder of the Pressure transducer 1 pressure leads, dia air from the to the right lying compressed air space Ib dos Pnsumatlkzylinders but ms free can escape

In this switching state, the piston 1e of the pressure transducer becomes 1 driven to the right. He presses the hydraulic fluid from the pressure chamber 1d into the hydraulic part of the Pump system eln # At the same time, the voainun puts a strain on the pressure switched connection 4d of the distributor 4 is also supplied Control pressure in the form of a compressed air signal, the control chamber 5a of the distributor 5 ^ d moves it to the left »

In the present switching state, dl <p via the Bores 1k and 1m on the directional control valve, compressed air signals deleted from the compressed air etium 1b of the pressure transducer 1, well the Right compressed air space 1b of the pressure converter 1; now with the atmosphere is connected · The directional control valve 15 is returned to the starting position to the right (according to FIG. 1).

After the piston 1e of the pressure transducer 1, the Seine 1k of Has crossed holes first, then released, controls the in the control chamber 13a of the directional control valve 13 now entered compressed air

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ORIGINAL

this in the tine switching division.

Bai his running further and further to the right happened Pistons 1e also the Heihe 1ei of holes so that compressed air through the inlet port 13c of the directional control valve 13 to the inlet j? c of the distributor 5 and to its outlet channel 5d and further into the control chamber 6a of the compressed air distributor 6 of the pressure converter 2 arrives.

The distributor 6 changes its switching position, dlo now the left is in the drawing, and the pressure is now on on its outlet channel 6d for the compressed air space lying to the left 2a of the pneumatic cylinder of the pressure converter 2 give. Of the Compressed air space 2b of the paeumatikzylmdors des Pressure converter, - is - ■; now via the outlet channel with it

Atmosphere, the Eolb3n 2e of the pressure converter 2 begins its Movement to the right, during which the hydraulic fluid from the Pressure oil chamber 2d of the Druckumformevs in the hydraulic main line is pressed into the pumping system o

At this time, the piston 1e of the pressure converter 1 becomes final pushed through so that, after briefly running together with the piston 2e, it is now at the stop on the right. Afterward hydraulic fluid is conveyed by the pressure transducer 2 alone. at

the left te llung of the distributor 6 is also via the

Control line fed by the outlet channel 6d, the control chamber 7a of the distributor 7 is acted upon with control pressure. According to the batati

left
As a result, distributor 7 assumes the switch position.

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BATH ORIGINAL

As long as the right compressed air space is in the pressure converter 2 remains relieved of the atmosphere through its connection, are those on rows 2k and 2m of holes in the cylinder wall of the pneumatic cylinder of the pressure converter 2 removed Compressed air signals of a directional control valve 14 that

others to switch you through the same no longer there · That Directional valve 14 is brought back to its starting position to the right

When the piston 2e of the pressure transducer 2 «is driven to the right, the rows 2k and 2m of bores are first covered one after the other, then released, whereby processes are initiated in the already known 7 / else processes, the ürgobnls of which is the appearance of a signal formed by compressed air at the outlet 7d -lea Vertallers 7 to stemximmmx 4a of distributor 4 is

meet the BetSl ^ a ^ geas '^ ftaXs ¹ ' aäTerteller 4 takes place his

Redirect to the Sohaltfafi'Klfeg on the right, where, by the compressed air spaces of the pressure converter 1 return to their function change and the directional control valve 13 for the passage of the compressed air is prepared after the distributor 5, the Spiol is now ernaut can begin. The hydraulic fluid is now out of the Pressure oil chamber 1c of the pressure converter 1 into the main hydraulic line repressed·

This means that hydraulic fluid is always in the hydraulic Part of the pumping system and there is a permanent

609814/0336

ORIGINAL INSPECTED

The beginning and end of the table represent the function of one pressure transducer and the movement status of the other. The relationship between the time-lent sequence of movements of one pressure transducer and that of the other then inferred from failure in the known pumping system as a result of a simultaneous flow control the pressure transducer 1 urü 2 arises from · starting the pumping system and maintaining its work cycle automatically take place, regardless of the soft movement resp. ₀ switching status pistons 1e and 2e of pressure transducers 1 and 2 and distributors 4, 5, 6, 7, 13 and valves 13 and 14 are straight.

When the pressure fluid is displaced from the oil pressure chamber 1c of the pressure transducer 1, the inlet of the check valve 8c in the corresponding hydraulic bridge circuit loaded, so that pressure continues into the hydraulic main line, to the inlet of the hydraulic distributor 10 and then, for example, into the cylinder space 11b of the actuating cylinder 11 on the ceiling can reproduce.

The pressure fluid from the drain chamber 11a of the adjusting cylinder 11 flows through the corresponding channel of the distributor 10 after the drain line, ie via the check valve 8b is the corresponding EÜck & chlagventilbrücka to the pressure oil chamber 1d of the pneumatic-hydraulic Pressure transducer 1.

Since the piston rod-like cylinder space 11a and the cover-like space Cylinder space 11b of the hydraulic adjusting cylinder 11

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BATH ORIGINAL

have different contents, they are from oil pressure room 1c the pressure converter 1 also pushes β and that in its pressure oil chamber 1d unequal volume of hydraulic fluid pressed down

At the indulgence uei; Printi: IiLa ai ^ ke It aua dam piston rod side- QQia. The volume of the cylinder chamber 11a of the hydraulic cylinder 11 is smaller than the amount of the working fluid displaced from the pressure oil chamber 1c of this pressure transducer 1 and vice versa 1c dos pressure converter 1 is opened and the connection between pressure oil chamber 1d and pressure oil reservoir 20 is established.

So that a pressurized oil chamber like the 1d is removed from the pressurized oil

ςβη

Memory 20 can be sucked in, one leaves there a slight overpressure arise, which can be found on the neumatic pressure reducer 12 and pneumatic pressure relief valve 22 sets.

When the piston 1e of the pressure converter 1 moves on the right, the pressure fluid is from the pressure oil chamber 1d, below

Pressure to the check valves 8d and 8b of the hydraulic bridge circuit and then m the pressure line to the hydraulic 3rd cylinder 11 promoted «The Pressure fluid via the check valve 8a of the hydraulic bridge circuit to the pressure oil chamber 1c of the pressure converter 1

6098U / 033I3U ,,

BATH ORIGINAL

The difference in content between koibanstangenseltigem 11a and cover! side on the 11b cylinder space of the hydraulic actuating cylinder 11 is compensated by the check valve 15, now below jjjinfluss of taken from the pressure oil chamber 1d of the pressure converter 1 Control pressure released, its öidruckrauw 1o with deai pressure oil flushing char 20 connects.

Similarly 'Heise, the working cycle proceeds 2y on the hydraulic .pages in which pneumatic-hydraulic pressure transformer

There is still a special valve 40 in the pumping system (Flg. 1) for quick venting of the hydraulic part its filling with pressure IuW lgkalt

So the hydraulic Stollzyllndar 11 is each with a and the same amount of hydraulic fluid driven between the two Drucköiräujaen the pressure transducers 1 and 2 in a detour via the hydraulic stall cylinder under .Abgabe your one

from Q? ell on dan öldruckspoicher or "removal of its one part ^v the

Oil pressure accumulator oscillates.

The one proposed for the pneumatic-hydraulic pumping system Tax adjustment is characterized by the fixed coupling between the flow rate of the working fluid on the hydraulic Actuating cylinder 11 and flow 3sienge the same of the compressed air source off, whereby the compressed air energy in all operating states is used optimally.

6098U / 0336

BATHROOM 0RK3INAL

The! Function of the tensioning device for product lines on a preferred modification of the pneumatic-hydraulic tube Pumpanla ^^ J.st following <>

Ia initial state as in Flg. 2, the pistons 25a of the hydraulic barn cylinder 25 are in the extreme position on the left, the hydraulic distributors 24 are in the neutral division and the hydraulic pressure transducer 23 and its distributor 26 are in the position to the right be in any position _f depending on the order in which the work pieces m the chucks "A" are tensioned ·

When switching on the coils of the Hydraullk Vertaller 24 these are reversed to the left switch position, so that nunmohr the dachshund-string cylinder spaces 25b of the hydraulic, Adjusting cylinder 25 with the pressure from the hydraulic pressure line the pumping system are loaded and their pistons the clamping device Move "A" to the top position.

When starting with the device "A" of the clamping part, a limit switch (left in the drawing) is actuated, v / ülcher the "distributors 26 and 28 or the distributor 26 alone, if the distributor 28 is already in one of the end positions , reverses

The hydraulic distributors lead to the left stop position 26 and 28 the pressure on the ceiling-side edge of the hydraulic

S0SS14 / 03 36

Ilseilen Druckumforniors 23 to whose piston rod by moving it
to the left begins to be pushed, pressurized oil from the high pressure room 23a to the inlets of the hydraulic distributor 24 · out
displaced, from where as into the slippery cyI Indian rooms
25b the hydraulic cylinder 25 reaches · The pressure acting on the cylinder is so much greater than that in the

pneumatic-hydraulic pumping system self-assembling how much greater

iG2 sohnittsflache of the low pressure space of the pressure transducer 23 than that of its high pressure space 23a * "" is,
one of the throttling by the pressure regulator 31 uad. 32, which are always set to the pressure value corresponding to the required clamping force, disregards «,

The distributor 28 is allowed in the left or pike position the flow of hydraulic fluid; from the hydraulic pressure line the pneumatic-hydraulic pump system via the pressure regulator 31 and 32 to the Uleder pressure chamber of the hydraulic pressure converter 23 · The pressure regulators are set to different Pressures set, which is why the clamping force change in the course of the Work cycle takes place automatically

Well the hydraulic pressure transducer 23 is switched on and the pistons of the hydraulic adjusting cylinder 25 hardly move need to move, the Druckolverbrauoh is from the pressure transducer 23 very low and practically only the leak through the high pressure circuit, which has nothing but the hydraulic Yortellerη 24

6098 U / 0336 BADORfGINAL

contains, equalizeDagagen are dxe pressure regulators 31 and 32, who have a lot of leakage, also. High-pressure krels the pressure transducer 23 relocated in the Niedeidruckkrels, so that one can take into account this leakage volume boi the dimensioning of the

Hoοhdruckrauras 23a dos Druckumfcrraor3 23 and thus de3 Druckumformers can refrain himself,

Subject completion of the processing cycle, in the last one Phase is carried out with the application of increased pressure, the Hydraullk distributors 24 and 26 are controlled to the right, by energizing the electromagnets of the hydraulic vurtellar 24- the Coil of the hydraulic distributor - «26 but is de-energized. The pistons the hydraulic cylinder 25 are now to the left up to the .ώα-sohlas while the piston of the pressure transducer was 23 in the starting position is adjusted back

The hydraulic divider 28 can after the processing cycle -. as well as during its duration for the purpose of change the clamping force, if necessary, in the middle of the processing cycle be operated

BqI of the third version of the pneumatic-hydraulic system are leaking devices omitted ^? in the I-hole pressure circuit of the hydraulic pressure converter 35 * The high pressure chamber 35a of this pressure converter

tied together

formers 35 is dij? ect V _w ith dom deckelseltigen chamber of the hydraulic Stel! cylinder 36 while anoint from the pressure line of pneumatic-hydraulic pumping station by the

BAD OFHGfNAL

Hue ^ blow valve 38 ^ separates is

Such a circuit is appropriate when it comes to such work processes where the increased pressure must be maintained along the salt. "

6098U / 0336

Claims (1)

ii.JPnGumatlsch-hydrauliiücha pumping system »there are two of them Pneumatic-hydraullsaha has double-acting pressure transducers, darart that the compressed air space of the respective pneumatic cylinder -position- übar two two ^v distributor source associated with ^r as compressed air and the respective pressure oil chambers through check - valves with hydraulic pressure and äücklaitung au or ,, of the hydraulic Susllzyllndera for production facilities komiuunlsioren, characterized _t that -stellung8-jewells both Zwel ^ ν manifold (4, 5, or _e 6, 7) as zylindrische- Slides are formed, one of which (4 or 6), has the function of a control element and via its inlet (4c or 6c) with the compressed air source (3), via its Aa & v laakana'le (4d, 4e or 6d, 6e) parallel to the compressed air spaces (1a »1b or 2a »2b) of the pneumatic cylinder of the pneumatic-hydraulic pressure transducer (1 or 2) and the control chambers -position- (5a> 5b or 7a, 7b) of the other two ^v J distributor (5 or 7) is,
verbtmden ^v that takes over the function of a control element and exercises. ¹ its outlet ducts (5d, 5e or 7d, 7e) are connected in parallel with the two control chambers (6a, 6d or 4b, 4a) of the same two-position distributor (6 or «4) at the other, which achieves that the compressed air spaces (1a, 1b and 2a, 2b) of the two Pneumatlkzyimder the pneumatic-hydraulic pressure transducer (1 and 2) with the compressed air qua He (3) then alternately 6098 U / 0336 BAD ORfQJNAL koaimuiiiäloran, .venn the pistons de and 2e) move in their pneumatic cylinders, whereby the non-return valves (8a, 8b, 8c, 3d and 9a, 9b, 9o, 9d) ^ u zvni non- return bridges each made up of four non-return valves are interconnected and for. Adjustment of the flow rate of the pressure fluid displaced from the cylinder chambers (11a and 11b) of the hydraulic Stellaylmder (11)> a system is provided whose inlet connections lead to the same diagonals ("eife" and "e'-k" ¹ ) of the two bridge circuits, namely those in which they are also parallel to the balden pressure oil spaces (1c, 1d and 2c, 2d) of the two pneumatic-hydraulic pressure guides, whereas the other two ("lm ^u , and"l'-ia ¹ ") are diagonals of the two Check valve bridges ^mi-fc . connected to the hydraulic pressure or leakage lining 2 »System according to claim 1, characterized in that it is also provided with twelve 5-way valves (13, 14) with one-sided pneumatic actuation and in the cylinder wall of the pneumatic cylinder of both pneumatic-hydraulic pressure converters (1, 2) two rows of _"$ are carried out through radial holes (1k, 1m or · 2k, 2m) such that each of the holes (1k, 2k) of the groove one row on a common channel of the control chamber (135a and 14-a), the (1a or 2m) of the other row with the inlet (13c or 14c; 6098U / 0336 BATH ORIGINAL (i4c or 14-d) of this 3-way valve communicate and the ¹ -distance between the two rows of Badlal bores (1k, 1m or two pistons (1e, 2e) of the pneumatic-hydraulic pressure transducer (1, 2) is adapted, dlo those only a minimal tent in the course of their movement running together * 3 · Plant according to. Claim 1, characterized that the balancing system for the flow rate the displaced hydraulic fluid with four pilot operated check valves (15, 16, 17, 18) is built up via outlet connections yes, with one of the pressure oil urns (1d, 1c, 2o, 2d). * the Druckumfoiimer (1, 2) are connected, the control chambers (15a, 16a, 17a, 18a,) each with the opposite pressure oil chamber (1c or 1d or «, 2c or · 2d) of the same pressure transducer (1 or 2) communicate and, said check valves (15, 16, 17, 18) via a common inlet (19) with the outlet of a pneumatic-hydraulic pressure oil reservoir (20) are in communication via its inlet (2) through a pneumatic pressure relief valve (22) and an eneumatic pressure regulator rer (12) communicates with the compressed air source (3) « 4 · System according to claims 1 to 3 »thereby & Q - mark refuses that the arrangement by a hydraulic Pressure converter (23) is added, the high pressure chamber 6098U / 0336 Parallel to the Kydi <aulik-Yer plate (24) del ¹ hydraul is ohan StallEylmder, while its piston rod (23b) and cover-side edge (23c) with the outlet channels of a hydraulic 4-way valve intended for the hydraulic pressure transducer (23) (26) associated with. its inlet ducts (26c) and (26dJ) is connected to an automatic control circuit (27) for regulating the pressure of the working fluid while the pumping system is in operation » 5 · Plant according to claim 5, characterized by ^ '«, that the automatic control circuit (27) for the Sin control of a high pressure of the hydraulic fluid Hydraulic n - ". 7oge distributor (28) with electrical actuation includes, in such a way that its 3m- (23ί) or .Drainage channel (28b) with the hydraulic pressure (29) or Buckle3.tung (30) kouuauiilzlort and its outlet channels (28c, 28d) to I3ydraulik-Drucla? eg- learn (31, 32), the two pressure regulators against check valves (33, 34) who work with their processes on a common line to the inlet (26c) of the hydraulic 4-way valve (26) are electrically operated. 6. Plant according to claim 1 to 5, characterized gakennze t refuse that they use a hydraulic pressure transducer (35), whose high pressure roughness (35a) with the cover iron It igen cylinder space (36c) of the hydraulic actuator cylinder (36) communicated in such a way that it comes from the outlet channel (37a) 609814/0336 BATH ORIGINAL The hydraulic distributor (37) is separated by a releasable check valve (38), the inlet channel (38 &) of which is connected to the said inlet channel (37b) of the hydraulic prescaler O7) , the outlet channel (38b) of which pai'ullef ¹¹¹¹¹ Dx'uokraum (3Sc) of the hydraulic adjusting cylinder (36) and high pressure ^ aum (3 ^ a) of the hydraulic pressure converter (33) and whose riser (39) is connected to the other outlet (37b) the hydraulic (37) mentioned » 609814/0336 BAD ORfGINAL