EP2102501A1 - Apparatus for adjusting top clearance of reciprocating compressor - Google Patents
Apparatus for adjusting top clearance of reciprocating compressorInfo
- Publication number
- EP2102501A1 EP2102501A1 EP06824169A EP06824169A EP2102501A1 EP 2102501 A1 EP2102501 A1 EP 2102501A1 EP 06824169 A EP06824169 A EP 06824169A EP 06824169 A EP06824169 A EP 06824169A EP 2102501 A1 EP2102501 A1 EP 2102501A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- pistons
- top clearance
- piston connection
- suction
- 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.)
- Granted
Links
- 230000004044 response Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B27/1036—Component parts, details, e.g. sealings, lubrication
- F04B27/1054—Actuating elements
- F04B27/1063—Actuating-element bearing means or driving-axis bearing means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/0873—Component parts, e.g. sealings; Manufacturing or assembly thereof
- F04B27/0878—Pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B27/1036—Component parts, details, e.g. sealings, lubrication
- F04B27/1054—Actuating elements
- F04B27/1072—Pivot mechanisms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/14—Control
- F04B27/16—Control of pumps with stationary cylinders
- F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/12—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/16—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by adjusting the capacity of dead spaces of working chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/14—Control
- F04B27/16—Control of pumps with stationary cylinders
- F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
- F04B27/1804—Controlled by crankcase pressure
- F04B2027/1822—Valve-controlled fluid connection
- F04B2027/1827—Valve-controlled fluid connection between crankcase and discharge chamber
Definitions
- the present invention relates to an apparatus for adjusting a top clearance of a reciprocating compressor, and more particularly, to an apparatus for adjusting a top clearance of a reciprocating compressor capable of readily adjusting a top clearance between a bottom surface of a piston and a valve, without the need to disassemble components.
- a reciprocating compressor is composed of a piston, a piston drive apparatus, a cylinder block, and a valve, and widely used in a compressor, a pump, or the like.
- FIGS. IA and IB illustrate a swash plate type compressor disclosed in Korean
- Patent Registration No. 0519744 as an example of a reciprocating compressor.
- the conventional variable displacement swash plate type compressor 10 includes a cylinder block 11 having a plurality of cylinder bores 1 Ia arranged in parallel in a longitudinal direction at its inner periphery, a front housing 12 sealed in the front of the cylinder block 11, and a rear housing 13 sealed in the rear of the cylinder block 11 with a valve plate 13a interposed therebetween.
- a crank chamber 14 is disposed inside the front housing 12.
- One end of a drive shaft 15 passing through the crank chamber 14 is rotatably installed at the center of the front housing 12 and the other end of the drive shaft 15 is supported by a bearing l ie at a center shaft hole 1 Ib in the cylinder block 11.
- a lug plate 16 and a swash plate 17 are installed on the drive shaft 15, and a spring 27 is interposed between the lug plate 16 and the swash plate 17 to re- siliently support the swash plate 17 against the lug plate 16.
- the lug plate 16 has a pair of power transmission projections 16a each having a straight hinge hole 16b and projecting from one surface thereof to be simultaneously rotated with the drive shaft 15.
- the swash plate 17 is inserted into the drive shaft 15 at a predetermined angle, and hinge pins 18 are inserted into the hinge holes 16b formed at the power transmission projections 16a of the lug plate 16, such that the swash plate 17 rotates with the lug plate 16, causing it to vary in inclination.
- shoes 20 are inserted into an outer periphery of the swash plate 17 to be slidably inserted into pistons 19 disposed in the cylinder bores 11a.
- the rear housing 13 has a suction chamber 21 and a discharge chamber
- valve plate 13a interposed between the rear housing 13 and the cylinder block 11 has suction ports 23 and discharge ports 24 corresponding to the cylinder bores 11a.
- 13a has a suction lid 25 and a discharge lid 26, respectively, which open and close the suction port 23 and the discharge port 24 in response to pressure variation caused by reciprocation of the piston 19.
- the rear housing 13 has a control valve 28 for communicating the crank chamber 14 with the suction chamber 21 such that a difference between a coolant suction pressure in the cylinder bore 11a and a pressure in the crank chamber 14 is varied to adjust inclination of the swash plate 17.
- the conventional variable displacement swash plate type com pressor 10 adjusts inclination of the swash plate 17 in response to the pressure difference between a pressure in the crank chamber 14 and a suction pressure in the cylinder bore 1 Ia, as shown in FIGS. IA, IB, and 2, to adjust a stroke of the piston 19 connected to the swash plate 17 depending on inclination variation of the swash plate 17, thereby varying discharge capacity of the compressor.
- top clearance TC may be adjusted as necessary.
- a thrust bearing 31 having a predetermined width is installed between the cylinder block 11 and the drive shaft 15.
- FIG. 2 illustrates another swash plate type compressor disclosed in
- a top clearance is obtained by a bearing 78 interposed between two laces 77.
- the top clearance can be adjusted by changing the thickness of any of the two laces 77.
- An object of the present invention is to provide an apparatus for adjusting a top clearance capable of precisely and conveniently adjusting the top clearance on the basis of characteristics of a valve or piston of a reciprocating compressor.
- An aspect of the invention provides an apparatus for adjusting a top clearance of a reciprocating compressor including: a housing, a cylinder block having a plurality of cylinder bores, pistons reciprocally accommodated in the cylinder bores, a piston drive means for driving the pistons, piston connection shafts connected to the pistons, suction/discharge valves installed opposite to bottoms of the pistons, and a suction chamber and a discharge chamber formed in the housing through the medium of the suction/discharge valves, characterized in that each of the piston connection shafts has a conveyance nut threadedly engaged therearound.
- the conveyance nut When seen in an axial direction of the piston connection shaft, the conveyance nut may have a fixing groove having a plurality of prominences and depressions formed at the center of the conveyance nut in a circumferential direction, a fixing washer having prominences and depressions formed therearound may be installed in the fixing groove, and the fixing washer may pass through the piston connection shaft.
- the fixing washer may be formed of a resilient thin plate, and may be resiliently inserted into the fixing groove of the conveyance nut.
- the fixing washer may be fastened to the piston connection shaft in a rotational direction.
- the piston connection shaft and the fixing washer coupled with the piston connection shaft may be formed in a polygonal shape having round corners or an oval shape.
- the fixing groove of the conveyance nut, with which the fixing washer is coupled may have a step formed therearound.
- a thrust bearing may be installed in the front or rear of the conveyance nut.
- the piston connection shaft is a drive shaft rotatably supported by the cylinder block, a swash plate may be installed at the drive shaft to simultaneously rotate with the drive shaft and vary the inclination thereof, and the piston may be reciprocally accommodated in the cylinder bore and be slidable back and forth with respect to the swash plate.
- FIG. IA is a longitudinal cross-sectional view of a conventional swash plate type compressor
- FIG. IB is an enlarged view of a top clearance of FIG. IA;
- FIG. 2 is a longitudinal cross-sectional view of another conventional swash plate type compressor
- FIG. 3 is a longitudinal cross-sectional view of a machine having an apparatus for adjusting a top clearance in accordance with an exemplary embodiment of the present invention
- FIG. 4 is an enlarged longitudinal cross-sectional view of the apparatus for adjusting a top clearance of FIG. 3;
- FIG. 5 is a partial cross-sectional perspective view of FIG. 4.
- FIG. 6 is an exploded cross-sectional perspective view of FIG. 4.
- a reciprocating compressor 1000 in accordance with the present invention includes a housing 100, a cylinder block 110 having a plurality of cylinder bores 110a, a drive shaft 140 rotatably supported by the cylinder block 110, a swash plate 150 connected to the drive shaft 140 and rotatably installed to vary its inclination, pistons 200 reciprocally accommodated in the cylinder bores 110a and capable of sliding back and forth with respect to the swash plate 150, a suction/discharge valve apparatus 300 installed opposite to a bottom surface of the piston 200, and a suction chamber 131 and a discharge chamber 132 formed at the housing 100 through the medium of the suction/discharge valve apparatus 300.
- the housing 100 comprises a front housing 120 and a rear housing 130, interposing the cylinder block 110 therebetween.
- the rear housing 130 has the suction chamber 131 and the discharge chamber 132.
- a valve plate 330 has suction ports 331 for communicating the cylinder bores 110a with the suction chamber 131, and discharge ports 332 for communicating the cylinder bores 110a with the discharge chamber 132.
- suction valves and the discharge valves for opening and closing the suction ports 331 and the discharge ports 332 in response to pressure variation depending on reciprocation of the pistons 200, respectively.
- the cylinder block 110 has eight cylinder bores 110a. Coolant introduced from the suction chamber 131 by the pistons 200 reciprocating through the cylinder bores 110a is continuously compressed.
- the drive shaft 140 is rotatably supported by the front housing 120 and the cylinder block 110 via a bearing 400.
- the swash plate 150 is slidably coupled with the pistons 200 by shoes 201.
- connection links 600 are interposed between the connection projections 155 and the drive shaft 140, which are connected to each other by hinge pins 610. Therefore, the connection links 600 and the connection projections 155, and the connection links 600 and the drive shaft 140 can be hinged to each other.
- a top clearance adjusting apparatus 500 for adjusting a top clearance between the pistons 200 and the suction/ discharge valve apparatus 300 is installed to appropriately adjust the top clearance which varies according to a deviation between the length of the valve or piston, and the length of the cylinder.
- a conveyance nut 510 may be threadedly engaged with the drive shaft
- the drive shaft 140 axially moves depending on rotation of the conveyance nut 510. That is, the conveyance nut 510 becomes a rotating drive part which rotates at the original place, not moving in an axial direction, and the drive shaft 140 becomes a driven rotation part.
- a thrust bearing or an equivalent structure 530 is installed before or after the conveyance nut 510.
- the thrust bearing is selected there is no need to change its specification.
- a conveyance distance per revolution of the conveyance nut 510 should be precisely set. That is, when the top clearance is determined, using the conveyance distance a user can rotate the conveyance nut 510 to precisely adjust the top clearance.
- the conveyance nut 510 is threadedly engaged with the drive shaft 140. Therefore, in order to fix the top clearance, even though the drive shaft is rotated, the conveyance nut 510 should be rotated in a state in which the rotated position is fixed to the drive shaft 140.
- the drive shaft 140 and the conveyance nut 510 require an anti-rotation structure.
- the anti-rotation structure may be a fastening force of the threaded engagement itself which is between the drive shaft 140 and the conveyance nut 510.
- a fixing washer 520 is coupled with the conveyance nut 510 through the drive shaft 140 to be fixed thereto.
- the conveyance nut 510 when seen in an axial direction, includes a fixing groove 511 having a plurality of prominences and depressions 512 formed at the center thereof in a circumferential direction, and the fixing washer 520 has prominences and depressions 522 formed in a circumferential direction thereof to be coupled with the fixing groove 511.
- the top clearance can be determined depending on the number of the prominences and depressions 512 and 522 (in FIG. 4, fourteen). That is, under the condition that its strength can be sustained, the greater the number of prominences and depressions, the higher the precision of the top clearance.
- the top clearance can be adjusted to the micron unit.
- the fixing washer 520 is made of a resilient hollow thin plate, the fixing washer 520 is resiliently inserted into the fixing groove 511 of the conveyance nut 510 to securely fix the conveyance nut 510.
- the fixing washer 520 should be fixed to the drive shaft 140 without any relative rotation. For this purpose, as shown, the drive shaft 140 and the fixing washer
- a step is circumferentially formed at the fixing groove 511 of the conveyance nut 510, with which the fixing washer 520 is coupled, to prevent the conveyance nut 510 from slipping in an axial direction during operation of the compressor.
- Reference symbol P designates a pulley for receiving power from an engine (not shown) through a belt (not shown) to rotate the drive shaft 140.
- the above-described top clearance adjusting apparatus 500 may be adapted to various reciprocating compressors including a piston, a cylinder block, a valve, and a piston drive unit.
- Various swash plate type or crank-slide link drive type mechanisms using rotational force of an engine may be adapted as the piston drive unit.
- the top clearance adjusting apparatus including the conveyance nut and the fixing washer is coupled with the piston connection shaft of the reciprocating compressor such as a pump, as well as the compressor shown in FIGS. 1 and 2, thereby readily enabling top clearance adjustment.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Compressor (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/KR2006/005467 WO2008072809A1 (en) | 2006-12-14 | 2006-12-14 | Apparatus for adjusting top clearance of reciprocating compressor |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2102501A1 true EP2102501A1 (en) | 2009-09-23 |
EP2102501A4 EP2102501A4 (en) | 2012-07-25 |
EP2102501B1 EP2102501B1 (en) | 2013-07-03 |
Family
ID=39511806
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06824169.4A Not-in-force EP2102501B1 (en) | 2006-12-14 | 2006-12-14 | Apparatus for adjusting top clearance of reciprocating compressor |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2102501B1 (en) |
KR (1) | KR101089859B1 (en) |
WO (1) | WO2008072809A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102240115B1 (en) * | 2015-01-27 | 2021-04-15 | 학교법인 두원학원 | Reciprocating Compressor |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2155116A (en) * | 1984-02-21 | 1985-09-18 | Sanden Corp | Controlling swash-plate pumps |
EP0172970A2 (en) * | 1983-12-23 | 1986-03-05 | Sanden Corporation | Refrigerant compressor |
JPH025770A (en) * | 1988-06-23 | 1990-01-10 | Toyota Autom Loom Works Ltd | Variable capacity compressor with swinging plate |
US5063829A (en) * | 1989-08-09 | 1991-11-12 | Hitachi, Ltd. | Variable displacement swash plate type compressor |
US6368070B1 (en) * | 1999-06-28 | 2002-04-09 | Sanden Corporation | Variable displacement compressor |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0341101Y2 (en) * | 1988-03-23 | 1991-08-29 | ||
JP4160669B2 (en) * | 1997-11-28 | 2008-10-01 | 株式会社不二工機 | Control valve for variable displacement compressor |
-
2006
- 2006-12-14 EP EP06824169.4A patent/EP2102501B1/en not_active Not-in-force
- 2006-12-14 WO PCT/KR2006/005467 patent/WO2008072809A1/en active Application Filing
- 2006-12-14 KR KR1020097012417A patent/KR101089859B1/en active IP Right Grant
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0172970A2 (en) * | 1983-12-23 | 1986-03-05 | Sanden Corporation | Refrigerant compressor |
GB2155116A (en) * | 1984-02-21 | 1985-09-18 | Sanden Corp | Controlling swash-plate pumps |
JPH025770A (en) * | 1988-06-23 | 1990-01-10 | Toyota Autom Loom Works Ltd | Variable capacity compressor with swinging plate |
US5063829A (en) * | 1989-08-09 | 1991-11-12 | Hitachi, Ltd. | Variable displacement swash plate type compressor |
US6368070B1 (en) * | 1999-06-28 | 2002-04-09 | Sanden Corporation | Variable displacement compressor |
Non-Patent Citations (1)
Title |
---|
See also references of WO2008072809A1 * |
Also Published As
Publication number | Publication date |
---|---|
KR101089859B1 (en) | 2011-12-05 |
KR20100004916A (en) | 2010-01-13 |
EP2102501B1 (en) | 2013-07-03 |
EP2102501A4 (en) | 2012-07-25 |
WO2008072809A1 (en) | 2008-06-19 |
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