CN202883034U - Air valve for high-power gas engine - Google Patents
Air valve for high-power gas engine Download PDFInfo
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- CN202883034U CN202883034U CN201220437486.1U CN201220437486U CN202883034U CN 202883034 U CN202883034 U CN 202883034U CN 201220437486 U CN201220437486 U CN 201220437486U CN 202883034 U CN202883034 U CN 202883034U
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- air valve
- valve
- sealing face
- power gas
- gas engine
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Abstract
The utility model relates to an air valve for a high-power gas engine. The air valve comprises an air valve neck, a valve disk and an air valve sealing face connected with the peripheral face of the air valve neck and the peripheral face of the valve disk. The air valve sealing face is formed by surfacing high temperature alloy and heating rolling and the hardness of the air valve sealing face is over Vickers hardness 700. Connection between the air valve sealing face and the peripheral face of the valve disk is non-sharp-angled arc-shaped. The air valve for the high-power gas engine is high-temperature-resistance, anti-abrasion, anti-corrosion, good in anti-fatigue performance in high temperature and particularly applicable to the high-power gas engine.
Description
Technical field
The present invention relates to engine fittings, in particular for air valve of high power gas motor and preparation method thereof.
Background technique
Along with industry is fast-developing, the industrial flammable tail gas that every profession and trade produces is also more and more, fill out heap etc. such as colliery, gas, brewery, paper mill, rubbish, the inflammable gas overwhelming majority is directly discharging all, caused severe contamination and potential safety hazard and energy waste, it is that state key is helped project that Speeding up development can adapt to every inflammable gas heavy duty (gas engine).
Yet, compare and fuel engine, diesel engine for example, the delivery temperature of gas engine generally is higher than fuel engine, for example about 200 ℃, when adding work in mill, so conventional fuel oil air valve can't satisfy the usage requirement of high-performance gas motor, namely, require air valve, the especially outlet valve of gas engine will adopt more wear-resisting, resistant to elevated temperatures material, cost higher this serious restriction high power gas engine development and use.In addition, gas engine is with respect to fuel engine, and often intake temperature is higher, because the suction valve of gas engine is because the dry grinding of combustion gas, it is also more serious to wear and tear, so the suction valve of gas engine is also had higher requirement to heat-resisting quantity and the wear resistance of material.
At present, mainly concentrate on the performance of Wear-resistant, high-temperature resistant for the research of the air valve that is used for the high power gas motor and study.For example CN101497970A discloses a kind of Austenitic Alloy Steel, in order to resist the corrosion of high load combustion gas.
Summary of the invention
The problems referred to above in the face of the prior art existence, the inventor is conceived to improve the geometrical shape of the existing air valve for fuel engine of the applicant, it is largely increased in property such as high temperature resistant, wear-resisting, corrosion-resistant, high temperature fatigue resistances, so that it can be used for gas engine, especially powerful gas engine.
At this, the invention provides a kind of air valve for the high power gas motor, comprise air valve neck, valve disc and connect the outer circumferential face of described air valve neck and the air valve sealing face of the outer circumferential face of valve disc; Wherein, described air valve sealing face is the above air valve sealing face of HV700 for the hardness through built-up welding refractory alloy and heating roll extrusion formation; Described air valve sealing face is connected with the arc that is connected to of the outer circumferential face of described valve disc; And the bottom surface of described valve disc is configured to circular arc.
At first, the hardness that the present invention forms by employing process built-up welding refractory alloy and heating roll extrusion is the air valve sealing face more than the HV700, need not special exotic material, and cost is lower.
Secondly, air valve sealing face of the present invention is connected with the arc that is connected to of the outer circumferential face of valve disc; And the bottom surface of valve disc is configured to circular arc.Be the present invention by changing the geometrical shape of air valve, making connection between these air valve components all is smooth connections without wedge angle, makes the exhaust of air valve and/or air inlet more smooth and easy, thereby can reduce delivery temperature.On the contrary, the connection between the existing air valve component (referring to Fig. 1), for example air valve sealing face 1 (the work conical surface) often forms wedge angle 6 with the bottom surface 5 of valve disc 2, hinders easily flowing of exhaust.
In addition, the bottom surface of valve disc is configured to circular arc, compares with the bottom surface (referring to Fig. 1) of the valve disc of the existing air valve that is generally the plane, reduces heat energy and assembles, and strengthens high-temperature behavior, improves radiating effect, is conducive to hang down the temperature of air valve.
Preferably, air valve of the present invention is particularly useful for outlet valve and suction valve.Delivery temperature is usually higher, relative and suction valve, and outlet valve is higher to requirement high temperature resistant, wear-resisting, corrosion-resistant, the high temperature fatigue resistance.And gas engine is dry grinded owing to the suction valve of gas engine with respect to fuel engine, and loss is also more serious, so the suction valve of gas engine is also had higher requirement to the wear resistance of material.
Preferably, the outer circumferential face of described air valve sealing face and described valve disc is connected to smooth connection without wedge angle.This further makes the air-flow in air valve more level and smooth, smooth and easy.
Again, used refractory alloy can be nickel chromium iron refractory alloy or stellite (Stellite) among the present invention.Material of the present invention is conventional material, be fit to sizable application.
Description of drawings
Fig. 1 is the schematic representation of existing air valve;
Fig. 2 is the schematic representation of example air valve of the present invention;
Fig. 3 is the schematic representation of another example air valve of the present invention;
Fig. 4 is the partial enlarged drawing that air valve surfacing part of the present invention is shown;
The surfacing hardness testing result contrasted before and after Fig. 5 illustrated high hot rolling.
Symbol description:
1 air valve sealing face;
2 valve discs;
3 air valve necks;
The outer circumferential face of 4 valve discs;
The bottom surface of 5 valve discs;
6 wedge angles;
7 surfacing parts.
Embodiment
With reference to Figure of description, and further specify with the following embodiments the present invention, should be understood that following mode of execution only is used for explanation the present invention, and unrestricted the present invention.
The present invention, in combining for many years fuel engine air valve manufacturing of our company, obtain on the multinomial roll extrusion patented technology basis, in the manufacturing of gas engine air valve, obtain organically combining and further having improved the air valve geometrical shape, the performances such as it is high temperature resistant, wear-resisting, high temperature resistance fatigue strength are greatly improved, and burn soot declined to a great extent when product used.
Referring to Fig. 1 and 2, air valve, especially outlet valve comprise air valve sealing face 1, valve disc 2 and air valve neck 3.Air valve sealing face 1 connects outer circumferential face 4 and the air valve neck 3 of valve disc 2.
Referring to Fig. 1, it illustrates the schematic representation of existing air valve, and wherein air valve sealing face 1 forms a wedge angle 6 with the outer circumferential face 4 of valve disc 2, and the bottom surface 5 of valve disc 2 is a plane.
Referring to Fig. 2, it illustrates the schematic representation of air valve of the present invention, wherein is connected to smoothly to air valve sealing face 1 non-angular the outer circumferential face 4 of valve disc 2.The bottom surface 5 of valve disc 2 is arc shaped surface.In addition, referring to Fig. 3, the outer circumferential face 4 of valve disc 2 and bottom surface 5 can be the smooth connection of non-angular, like this outer circumferential face 4 of valve disc 2 and bottom surface 5 an integrally formed arc shaped surface or spheres.
The preparation process of following simple declaration valve body of the present invention:
At first use the nickel chromium iron refractory alloy to carry out built-up welding as air valve sealing face 1 build-up welding alloy material at surfacing part 7 (the facial position of air valve sealing is referring to Fig. 4), hardness is that HV260～280 are softer after the built-up welding.Although adopt the nickel chromium iron refractory alloy here, also be suitable for yet should understand other suitable refractory alloys, for example stellite.
Then air valve sealing face 1 is carried out normal temperature surface degree of depth roll extrusion (cold roll), after being rolled into us and wanting hardness, heat again roll extrusion, carry out again age hardening heat treatment, last surface hardness can reach HV700 above (carry out hardness according to MAN company technique standard and detect, as seen its result has improved surface hardness greatly referring to Fig. 5), should be understood that and not carry out cold roll and directly heat roll extrusion and process.
See table 1, it illustrates the too vertical 12# of employing department as build-up welding alloy material, the valve face hardness gradient before and after the high hot rolling of the present invention is processed, and therefrom as can be known, high hot rolling has not only improved surface hardness, has also improved the hardness of whole layer:
Table 1:
Behind high hot rolling, hardfacing alloy layer toughness also improves greatly.Carry out the thermal shock comparative trial according to MAN company technique standard, and further improve temperature and continue test, the results are shown in Table 2.Can find out obviously that by after the roll extrusion high temperature thermal shocking performance has improved more than 200 ℃.
Table 2: air valve Stellite alloy hardened layer thermal shock test
Product name: CW200 air valve, test condition normal temperature water-cooled
Annotate: temperature columns mileage word is cracking in the table 2, and 0 expression is cracking not.
Behind the high hot rolling, the metallographic structure of hardfacing alloy layer occurs significantly to change.Before the roll extrusion, metallographic structure is to grow 9 grades of carbide, the grain sizes of dendroid distribution, and after the roll extrusion, 12 grades of even net distribution carbide, grain sizes are changed in metallographic structure.
At last surface rolling is carried out in outer circumferential face 4 and the bottom surface 5 of air valve neck 3, air valve sealing face 1, valve disc 2.Can change the top layer metallographic structure so on the one hand, improve surface roughness and can reach minute surface, strengthen the product pressure stress, improve fatigue strength, can change the original geometrical shape of air valve by surface rolling on the other hand, for example, with respect to existing air valve, can (referring to Fig. 1) make arc shaped surface (referring to Fig. 2) into from the plane with the bottom surface 5 of valve disc, orthodrome sphere (referring to Fig. 3) for example.Like this, increase the area of the bottom surface 5 of valve disc, can improve radiating effect.Exception, can make air valve sealing face 1 without the smooth connection (for example arc connection) of the wedge angle outer circumferential face to valve disc by surface rolling, namely, can make prior art air valve sealing face 1 into the small round corner transition with the wedge angle that becomes 6 that the outer circumferential face 4 of valve disc 2 forms, make its outlet valve more smooth and easy, reduce exhaust valve temperature.Moreover, also can make the outer circumferential face 4 of valve disc 2 and the connection between the bottom surface 5 also be the smooth connection without wedge angle by surface rolling, this exhaust of wherein flowing is more smooth.
Air valve of the present invention also can possess the parts that general air valve possesses except above-mentioned air valve sealing face 1, valve disc 2 and air valve neck 3, for example air valve stem (not shown).Because these parts do not relate to the technical problem of used solution of the present invention, here are not repeated, those skilled in the art can consult prior art and learn.
Should be understood that air valve of the present invention is preferably used as outlet valve, yet also can be used as suction valve.Air valve of the present invention can be used for powerful gas engine, with gas engine and marine engines etc., also can be used for diesel engine so that high performance diesel engine to be provided such as automobile.
Claims (4)
1. an air valve that is used for the high power gas motor is characterized in that,
Described air valve comprises air valve neck, valve disc and connects the outer circumferential face of described air valve neck and the air valve sealing face of the outer circumferential face of valve disc;
Wherein, described air valve sealing face is the above air valve sealing face of HV700 for the hardness through built-up welding refractory alloy and heating roll extrusion formation;
Described air valve sealing face is connected with the arc that is connected to without wedge angle of the outer circumferential face of described valve disc.
2. the air valve for the high power gas motor according to claim 1 is characterized in that, described air valve is outlet valve or suction valve.
3. the air valve for the high power gas motor according to claim 1 and 2 is characterized in that, the bottom surface of described valve disc is configured to circular arc.
4. the air valve for the high power gas motor according to claim 1 and 2 is characterized in that, described refractory alloy is nickel chromium iron refractory alloy or stellite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220437486.1U CN202883034U (en) | 2012-08-30 | 2012-08-30 | Air valve for high-power gas engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220437486.1U CN202883034U (en) | 2012-08-30 | 2012-08-30 | Air valve for high-power gas engine |
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| Publication Number | Publication Date |
|---|---|
| CN202883034U true CN202883034U (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220437486.1U Expired - Lifetime CN202883034U (en) | 2012-08-30 | 2012-08-30 | Air valve for high-power gas engine |
Country Status (1)
| Country | Link |
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| CN (1) | CN202883034U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670575A (en) * | 2012-08-30 | 2014-03-26 | 上海高斯通船舶配件有限公司 | Air valve used for high-power gas engine and manufacturing method thereof |
| US9540714B2 (en) | 2013-03-15 | 2017-01-10 | Ut-Battelle, Llc | High strength alloys for high temperature service in liquid-salt cooled energy systems |
| US9605565B2 (en) | 2014-06-18 | 2017-03-28 | Ut-Battelle, Llc | Low-cost Fe—Ni—Cr alloys for high temperature valve applications |
| US9683279B2 (en) | 2014-05-15 | 2017-06-20 | Ut-Battelle, Llc | Intermediate strength alloys for high temperature service in liquid-salt cooled energy systems |
| US9683280B2 (en) | 2014-01-10 | 2017-06-20 | Ut-Battelle, Llc | Intermediate strength alloys for high temperature service in liquid-salt cooled energy systems |
| CN114152430A (en) * | 2021-12-24 | 2022-03-08 | 东方电气集团东方汽轮机有限公司 | Comprehensive performance evaluation method for surfacing layer of sealing surface of valve seat |
| CN114152430B (en) * | 2021-12-24 | 2024-05-03 | 东方电气集团东方汽轮机有限公司 | Comprehensive performance evaluation method of surfacing layer of sealing surface of valve seat |
-
2012
- 2012-08-30 CN CN201220437486.1U patent/CN202883034U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670575A (en) * | 2012-08-30 | 2014-03-26 | 上海高斯通船舶配件有限公司 | Air valve used for high-power gas engine and manufacturing method thereof |
| CN103670575B (en) * | 2012-08-30 | 2016-06-08 | 上海高斯通船舶配件有限公司 | For air valve and its preparation method of high power gas engine |
| US9540714B2 (en) | 2013-03-15 | 2017-01-10 | Ut-Battelle, Llc | High strength alloys for high temperature service in liquid-salt cooled energy systems |
| US9683280B2 (en) | 2014-01-10 | 2017-06-20 | Ut-Battelle, Llc | Intermediate strength alloys for high temperature service in liquid-salt cooled energy systems |
| US9683279B2 (en) | 2014-05-15 | 2017-06-20 | Ut-Battelle, Llc | Intermediate strength alloys for high temperature service in liquid-salt cooled energy systems |
| US9605565B2 (en) | 2014-06-18 | 2017-03-28 | Ut-Battelle, Llc | Low-cost Fe—Ni—Cr alloys for high temperature valve applications |
| US9752468B2 (en) | 2014-06-18 | 2017-09-05 | Ut-Battelle, Llc | Low-cost, high-strength Fe—Ni—Cr alloys for high temperature exhaust valve applications |
| CN114152430A (en) * | 2021-12-24 | 2022-03-08 | 东方电气集团东方汽轮机有限公司 | Comprehensive performance evaluation method for surfacing layer of sealing surface of valve seat |
| CN114152430B (en) * | 2021-12-24 | 2024-05-03 | 东方电气集团东方汽轮机有限公司 | Comprehensive performance evaluation method of surfacing layer of sealing surface of valve seat |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130417 |