US1535341A - Packing construction for stoker plungers - Google Patents

Packing construction for stoker plungers Download PDF

Info

Publication number
US1535341A
US1535341A US265236A US26523618A US1535341A US 1535341 A US1535341 A US 1535341A US 265236 A US265236 A US 265236A US 26523618 A US26523618 A US 26523618A US 1535341 A US1535341 A US 1535341A
Authority
US
United States
Prior art keywords
plunger
ring
stoker
plungers
construction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US265236A
Inventor
Riley Robert Sanford
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SANFORD RILEY STOKER CO Ltd
Original Assignee
SANFORD RILEY STOKER CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SANFORD RILEY STOKER CO Ltd filed Critical SANFORD RILEY STOKER CO Ltd
Priority to US265236A priority Critical patent/US1535341A/en
Application granted granted Critical
Publication of US1535341A publication Critical patent/US1535341A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23KFEEDING FUEL TO COMBUSTION APPARATUS
    • F23K3/00Feeding or distributing of lump or pulverulent fuel to combustion apparatus
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23KFEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2203/00Feeding arrangements
    • F23K2203/002Feeding devices for steam boilers, e.g. in locomotives

Definitions

  • This invention relates primarily to means for preventing leakage o fine coal dust past the feeding plunger of an automatic underfeed stoker.
  • this fine coal gradually Works past the plunger as the latter is reciprocated, and an ob ectionable amount accummulates in front of the stoker.
  • my invention in its preferred form consists in the provision of a packing ring held in substantially fixed position axially and closely engaging the reciprocating stoker plunger.
  • An additional feature of my invention relates to the provision of means for forcing the ring yieldingly against the plunger.
  • My invention further relates to certain arrangements'and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.
  • FIG. 1 is a sectional elevation of a portion of an underfeed stoker with my improvement applied thereto;
  • V Fig. 2 is a sectional elevation taken along the line 2-2 in Fig. 1;
  • Fig. 3 is a partial sectional elevation taken along the line 3-3 in Fig. 2 and drawn on an enlarged scale.
  • an automatic underfeed stoker including a hopper 10, a cylinder casting 11, a plunger 12 having one closed end, a crank pin 13, and a connecting rod 14 through which the plunger is mechanically reciprocated.
  • the plunger 12 should be comparatively loose in the cylinder 11 as the conditions of operation do not permit close fitting bearings.
  • annular recess 15 in the cylinder 11 and have placed therein a packing ring 16.
  • This ring is preferably of metal, such as cast iron, and is split to permit its convenient insertion in the recess 15.
  • the ring is formed to a smaller diameter than the plunger, and the resilience of the metal contracts the ring about the plunger.
  • a stud 17 formed on the end of a screw 18 and projecting into the slit betweenthe ends of the ring, thus preventing angular movement thereof.
  • the lower springs 19 maybe retained in position by cross pins 20, and the upper spring 21 may be made adjustable by providing a threaded stop 22 above the spring.
  • the position of the hopper is such that the spring 21 must be placed at an'angle, requiring a spacing block 23 between the spring 21 and the ring 16.
  • the outer or right-hand edge of the ring 16 as seen in Fig. 3 is beveled so that any coal dust forced outward against the ring may increase rather than decrease the pres sure of the ring against the plunger.
  • the left-hand face is shown as normal to the surface of the plunger, enabling it to act as an efficient scraper.
  • the I rings 16 are loosely, mounted in the annular recess so that they may be yieldingly selfcentering upon the piston. These yielding rings form no effective part of the bearing for the piston which is slidable upon the continuous inner bearing-surface of the cyl- I inder 11.
  • the 'rin 's 16 center themselves type mounted in grooves in the plunger are not practicable as they would at times be beyond the end of the cylinder 11.

Description

R. S. RILEY PACKING CONSTRUCTION FOR STOKER PLUNGERS April 28, 1925.
Original F'iledDec. 4 1913 Patented Apr. 28, 1925.
UNITED STATES ROBERT SANFORD RILEY, 0F WORCESTER, MASSACHUSETTS,
ASSIGNOR TO SANFORD PATENT. OF
RILEY STOKER 00., LTD, 01 WORCESTER, MASSACHUSETTS.
PACKING CONSTRUCTION FOR STOKER PLUNGERS.
Application filed December 4, 1918, Serial No. 265,286. Renewed February 13, 1922. Serial No. 536,341.
To all whom it may concern.
Be it known that I, ROBERT SANFORD RILEY, a citizen of the United States, residing at Worcester, in the'county of Worcester and State of Massachusetts, have invented a new and useful Packing Construction for Stoker Plungers, of which the following is a specification.
This invention relates primarily to means for preventing leakage o fine coal dust past the feeding plunger of an automatic underfeed stoker.
With the usual construction, this fine coal gradually Works past the plunger as the latter is reciprocated, and an ob ectionable amount accummulates in front of the stoker.
It is the general object of my invention to provide a construction by which such leakage of coal around and past the plunger may be effectively prevented.
With this general object in view, my invention in its preferred form consists in the provision of a packing ring held in substantially fixed position axially and closely engaging the reciprocating stoker plunger.
An additional feature of my invention relates to the provision of means for forcing the ring yieldingly against the plunger. My invention further relates to certain arrangements'and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.
A preferred form of my invention is shown in the drawings, in which Fig. 1 is a sectional elevation of a portion of an underfeed stoker with my improvement applied thereto;
V Fig. 2 is a sectional elevation taken along the line 2-2 in Fig. 1; and
Fig. 3 is a partial sectional elevation taken along the line 3-3 in Fig. 2 and drawn on an enlarged scale.
Referring to the drawings, I have indicated certain usual parts of an automatic underfeed stoker, including a hopper 10, a cylinder casting 11, a plunger 12 having one closed end, a crank pin 13, and a connecting rod 14 through which the plunger is mechanically reciprocated.
It is found desirable in practice that the plunger 12, should be comparatively loose in the cylinder 11 as the conditions of operation do not permit close fitting bearings.
As the piston is forced into the hopper on its working stroke the plunger becomes coated with fine coal dust, a certain portion 9f which is carried along by the plunger on its return stroke, and in the usual construction this coal gradually works past the plunger and accumulates at the front of the stoker.
To prevent this undesirable result, I have formed an annular recess 15 in the cylinder 11 and have placed therein a packing ring 16. This ring is preferably of metal, such as cast iron, and is split to permit its convenient insertion in the recess 15. The ring is formed to a smaller diameter than the plunger, and the resilience of the metal contracts the ring about the plunger.
In Fig. 2 I have shown a stud 17 formed on the end of a screw 18 and projecting into the slit betweenthe ends of the ring, thus preventing angular movement thereof. I have also found .it desirable to supplement the natural resilience of the ring by providing a plurality ofcompression springs, each acting to force the ring against the plunger. The lower springs 19 maybe retained in position by cross pins 20, and the upper spring 21 may be made adjustable by providing a threaded stop 22 above the spring. In the particular construction shown in the drawings, the position of the hopper is such that the spring 21 must be placed at an'angle, requiring a spacing block 23 between the spring 21 and the ring 16.
The outer or right-hand edge of the ring 16 as seen in Fig. 3 is beveled so that any coal dust forced outward against the ring may increase rather than decrease the pres sure of the ring against the plunger. The left-hand face is shown as normal to the surface of the plunger, enabling it to act as an efficient scraper.-
I have also indicated the outer or righthand wall of the cylinder recess as inclined to correspond to the bevel of the ring, so that the tendency of the plunger to carry the ring along with it as it is withdrawn from the hopper will cause a slight wedging action, tending to force the ring more closely against the plunger.
In the drawings it will be noted that the I rings 16 are loosely, mounted in the annular recess so that they may be yieldingly selfcentering upon the piston. These yielding rings form no effective part of the bearing for the piston which is slidable upon the continuous inner bearing-surface of the cyl- I inder 11. The 'rin 's 16 center themselves type mounted in grooves in the plunger are not practicable as they would at times be beyond the end of the cylinder 11. By mounting the ring 16 in thefixed cylinder 11 instead of in the movable plunger 12, I provide a packing ring closely adjacent to the end of the cylinder and one which at all times remains in this position.
By the use of my improved construction the objectionable leakage of coal dust past the plunger is effectively eliminated.
Having described my invention, it will be evident that changes and modifications can be made therein by those skilled in the art without departing from thespirit and scope thereof as set forth in the claims, and I 0 not wish to be otherwise limited to the de- I tails herein disclosed, but what I claim is An automatic underfeed st'oker having, in combination, a coal hopper, a cylinder opening into the lower portion of said hopper and having an annular recess adjacent its inner end, 'a iston loosely slidable in said cylinder, mec anical means to reciprocate said piston, and means to prevent the escape of coal past said piston, said means comprising a split metal ring positioned in said recess and yieldingly engaging said piston, said ring and recess having associated inclined walls cooperating to force said ring against said piston as the latter moves away from said hopper.
In testimony whereof I have hereunto affixed my signature.
ROBERT SANFORD RILEY.
US265236A 1918-12-04 1918-12-04 Packing construction for stoker plungers Expired - Lifetime US1535341A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US265236A US1535341A (en) 1918-12-04 1918-12-04 Packing construction for stoker plungers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US265236A US1535341A (en) 1918-12-04 1918-12-04 Packing construction for stoker plungers

Publications (1)

Publication Number Publication Date
US1535341A true US1535341A (en) 1925-04-28

Family

ID=23009598

Family Applications (1)

Application Number Title Priority Date Filing Date
US265236A Expired - Lifetime US1535341A (en) 1918-12-04 1918-12-04 Packing construction for stoker plungers

Country Status (1)

Country Link
US (1) US1535341A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2772659A (en) * 1954-01-11 1956-12-04 Francis H Tennis Fish feeding device
US6238558B1 (en) 2000-06-06 2001-05-29 Beringer Llc Filter changer with bimodal sealing means
US20060175346A1 (en) * 2002-05-20 2006-08-10 Ingo Ederer Device for feeding fluids
US20100272519A1 (en) * 2007-10-21 2010-10-28 Voxeljet Technology Gmbh Method and device for conveying particulate material during the layer-wise production of patterns
US9770867B2 (en) 2010-12-29 2017-09-26 Voxeljet Ag Method and material system for building models in layers

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2772659A (en) * 1954-01-11 1956-12-04 Francis H Tennis Fish feeding device
US6238558B1 (en) 2000-06-06 2001-05-29 Beringer Llc Filter changer with bimodal sealing means
US20060175346A1 (en) * 2002-05-20 2006-08-10 Ingo Ederer Device for feeding fluids
US7665636B2 (en) * 2002-05-20 2010-02-23 Ingo Ederer Device for feeding fluids
US20100272519A1 (en) * 2007-10-21 2010-10-28 Voxeljet Technology Gmbh Method and device for conveying particulate material during the layer-wise production of patterns
US8727672B2 (en) 2007-10-21 2014-05-20 Voxeljet Ag Method and device for conveying particulate material during the layer-wise production of patterns
US20140202381A1 (en) * 2007-10-21 2014-07-24 Voxeljet Ag Method and device for conveying particulate material during the layer-wise production of patterns
US9469074B2 (en) * 2007-10-21 2016-10-18 Voxeljet Ag Method and device for conveying particulate material during the layer-wise production of patterns
US10099426B2 (en) 2007-10-21 2018-10-16 Voxeljet Ag Method and device for layer-wise production of patterns
US9770867B2 (en) 2010-12-29 2017-09-26 Voxeljet Ag Method and material system for building models in layers

Similar Documents

Publication Publication Date Title
US2712483A (en) Friction-reducing piston construction for internal combustion engines
US1535341A (en) Packing construction for stoker plungers
US1760122A (en) Engine piston
US2209109A (en) Centrifugal pump with axial movement of the shaft
US1992967A (en) Automatic packing
US3067584A (en) Sealing ring means for reciprocating piston used in power-operated percussive tool
US2094254A (en) Packing for internal combustion engine cylinders
US2363605A (en) Piston and cylinder construction
US1552083A (en) Coal-feeding mechanism for automatic stokers
US1384097A (en) Piston-packing
US1519478A (en) Means for varying the delivery of pumps
US1798158A (en) Stuffing box
US2328390A (en) Piston and ring assembly
US2073888A (en) Pump piston packing
US2774639A (en) Piston ring expander
US1288355A (en) Bearing for extended piston-rods.
US1901766A (en) Packing
US1404780A (en) Packing
US1416472A (en) Piston and piston ring
US1404654A (en) Wrist pin
US2100741A (en) Material feeding mechanism
US1528721A (en) Packing box
US2650869A (en) Piston ring
US2288911A (en) Piston ring arrangement
US1968999A (en) Stuffing box