EP2238349A2 - Reciprocating compressor having a valve plate comprising a disk valve - Google Patents
Reciprocating compressor having a valve plate comprising a disk valveInfo
- Publication number
- EP2238349A2 EP2238349A2 EP09702133A EP09702133A EP2238349A2 EP 2238349 A2 EP2238349 A2 EP 2238349A2 EP 09702133 A EP09702133 A EP 09702133A EP 09702133 A EP09702133 A EP 09702133A EP 2238349 A2 EP2238349 A2 EP 2238349A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- concave
- piston
- compressor according
- cylinder
- 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
- 239000003570 air Substances 0.000 claims abstract description 9
- 239000012080 ambient air Substances 0.000 claims abstract description 6
- 241000446313 Lamella Species 0.000 claims description 17
- 230000005489 elastic deformation Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/10—Adaptations or arrangements of distribution members
- F04B39/1066—Valve plates
-
- 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
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/10—Adaptations or arrangements of distribution members
- F04B39/1073—Adaptations or arrangements of distribution members the members being reed valves
-
- 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
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/10—Adaptations or arrangements of distribution members
- F04B39/1073—Adaptations or arrangements of distribution members the members being reed valves
- F04B39/108—Adaptations or arrangements of distribution members the members being reed valves circular reed valves
-
- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/1087—Valve seats
Definitions
- the present invention relates to a reciprocating compressor for generating compressed air with at least one cylinder in which a movable piston via a crank for compressing sucked ambient air is arranged, wherein a valve plate having at least one flap valve as a pressure valve, a cylinder space cylinder head side limited.
- the field of application of the present invention extends primarily to the vehicle sector, in which piston compressors are used for compressing ambient air, primarily in the area of compressed-air-operated brake systems.
- the reciprocating compressors draw their drive energy either directly from the internal combustion engine of the vehicle or are equipped with a separate drive, usually an electric motor.
- DE 196 31 415 A1 discloses a generic reciprocating compressor. This essentially consists of a compressor housing forming a plurality of cylinders, in which each associated piston is arranged so that it can move in an oscillating manner via a common crank drive. By the working movement of the piston ambient air is sucked in, compressed inside the cylinder and ejected as compressed air for further use.
- a valve plate is provided which limits the cylinder space on the cylinder head side.
- the valve plate contains a suction on the intake side designed in the manner of a check valve and also one of the type Non-return valve trained, but oppositely acting pressure valve. In both cases space-saving finned valves are used.
- Each louver valve has a spring plate consisting of valve lamella, which is tongue-like and is attached at one end to the valve plate. At the opposite end, the valve lamella covers a cylindrical opening through the valve plate, which connects to or from the cylinder space.
- the valve blades are flat in cross-section and housed sunk in a shallow recess of the valve plate so that they do not protrude beyond the surface of the valve plate. At this recess, a flat conical funnel connects, which establishes the connection to the cylindrical opening, which opens into the cylinder chamber.
- the piston At the top dead center of the piston results in the cylinder chamber remaining dead volume, which results from the distance of the piston to the valve plate plus the volume of the cylindrical openings for the lamella valve.
- the cylindrical openings take up a significant part of the dead volume.
- the distance from the piston to the valve plate is determined by the thickness of the suction valve, which is usually present next to the pressure valve. Since the suction valve is usually arranged on the underside of a valve plate, ultimately determines the distance between the piston and the suction valve, the dead volume in the cylinder.
- the disadvantage of the prior art is that the dead volume has a significant influence on the efficiency and the delivery rate of the compressor, ie should be as minimal as possible, ideally zero.
- the lamella valve has a flat valve in the initial state, which is pressed by the system pressure on the valve plate on this, so that the cylindrical opening is closed in the direction of the cylinder chamber and thus is sealed. If the pressure in the cylinder chamber rises above the system pressure, the valve lamella is lifted off the valve plate and the compressed air is released from the valve Cylinder space promoted in the cylinder head.
- the dead volume of the pressure hole is inevitable.
- the valve plate is made relatively thick, resulting in a particularly long-lasting cylindrical aperture and thus a relatively large dead volume.
- the invention includes the technical teaching that serving as a pressure valve blade valve on the side facing away from the piston has a machined into the valve plate concave valve seat recess, the contour of which is sealingly adapted to an equally concave valve blade.
- the advantage of the solution according to the invention lies, in particular, in the fact that, due to the concave valve seat recess, the lamellar valve has a rather flat cylindrical opening in the direction of the cylinder space, which generates correspondingly less dead volume.
- the present invention concave valve lamella can be made of a deep-drawn sheet metal part. This is fixed in a conventional manner with an attachment point, such as a screw, on the valve plate.
- the diameter of the cylindrical passage extending in the direction of the cylinder space preferably extends from the bottom region of the concave valve seat recess, ie its vertex, in the direction of the cylinder space, wherein the diameter of the aperture is preferably smaller than the thickness of the valve plate.
- the concave valve seat recess prefferably has a diameter in the edge area which corresponds at least to twice the diameter of the cylindrical opening.
- the concave valve seat recess should have a diameter in the edge region, which is larger than the edge diameter of the valve lamella.
- the depth of the concave valve seat recess should correspond at least to the thickness of the valve blade in order to effect a sufficiently large degree of deflection, and thus also an effective minimization of the dead volume.
- that is the degree of deflection of the valve lamella and the remaining length of the cylindrical aperture can be determined by the strength of the valve blade and the valve plate.
- valve blade assumes a substantially planar shape in the open state of the louver valve as a result of elastic deformation.
- the space required for the open state space is significantly lower than in prior art louvered valves.
- FIG. 1 is a schematic side view of a piston-cylinder arrangement of a reciprocating compressor with flap valve in the closed state
- FIG. 2 shows a schematic side view of a piston-cylinder arrangement of a reciprocating compressor with flap valve in the open state.
- an axially movable piston 2 for compressing sucked in ambient air is arranged in the cylinder 1 of a piston compressor.
- the intake valve is not shown here, but it is the pressure valve. This is designed in the manner of a lamella valve 3, which is part of a valve plate 4. With the valve plate 4, a cylinder chamber 5 is limited cylinder head side.
- the lamella valve 3 On the side facing away from the piston 2, the lamella valve 3 has a concave valve seat recess 6 incorporated in the valve plate 4.
- the cross-sectional contour of the VentilsitzausANSung 6 is adapted to the contour of an equally concave shaped valve blade 7 such that the valve blade 7 with the Ventilsitzaus principleung 6 form a kind seat valve.
- the concave-shaped valve blade 7 is a deep-drawn sheet metal part, which is attached to a - not shown here - on the valve plate 4. From the bottom region of the concave Ventilsitzausströmung 6, a cylindrical opening 8 extends in the direction of the cylinder chamber 5. Because of the concave valve seat recess 6 shortened axial extent of the opening 8, the dead volume, which occupies the piston 2 in the top dead center shown here, minimal.
- FIG. 2 takes the valve blade 7 in the open state of the louver valve 3 in consequence of elastic deformation of an almost flat shape.
- the compressed air flows during the open state of the louver valve 3 laterally between the edge of the valve blade 7 and the edge region of the concave Ventililsitzaus principleung 6 over, which has a larger diameter in the edge region, as the edge diameter of the valve blade. 7
- the invention is not limited to the preferred exemplary embodiment described above. On the contrary, modifications are conceivable which are included in the scope of protection of the following claims.
- the principle according to the invention to uncharged compressors.
- the dead volume can be significantly reduced so that the delivery rate and the power consumption of the reciprocating compressor are correspondingly improved.
- Analogous to the solution according to the invention for the pressure valve can be thought of even for the suction valve of the valve plate, a flat recess on the underside of the valve plate, so that the suction valve no longer raised rests on the valve plate.
- the piston bottom shelter can be reduced by the thickness of the valve lamella, including fasteners. LIST OF REFERENCE NUMBERS
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008004809A DE102008004809B4 (en) | 2008-01-17 | 2008-01-17 | Piston compressor with a valve plate having a lamella valve |
PCT/EP2009/000137 WO2009090033A2 (en) | 2008-01-17 | 2009-01-13 | Reciprocating compressor having a valve plate comprising a disk valve |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2238349A2 true EP2238349A2 (en) | 2010-10-13 |
EP2238349B1 EP2238349B1 (en) | 2012-03-14 |
Family
ID=40785810
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09702133A Not-in-force EP2238349B1 (en) | 2008-01-17 | 2009-01-13 | Reciprocating compressor having a valve plate comprising a disk valve |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2238349B1 (en) |
AT (1) | ATE549514T1 (en) |
DE (1) | DE102008004809B4 (en) |
WO (1) | WO2009090033A2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016223497A1 (en) | 2016-11-28 | 2018-05-30 | Volkswagen Aktiengesellschaft | Valve unit and compressor with such a valve unit |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1920772U (en) * | 1964-04-15 | 1965-08-05 | Erich Becker | DIAPHRAGM PUMP. |
JPS60122287A (en) * | 1983-12-06 | 1985-06-29 | Mitsubishi Electric Corp | Discharge valve apparatus of compressor |
US5263643A (en) * | 1992-12-24 | 1993-11-23 | Therm-O-Disc, Incorporated | Thermally responsive relief valve |
US5584676A (en) * | 1994-10-27 | 1996-12-17 | Tecumseh Products Company | Compressor discharge valve having a guided spherical head |
DE19631415C2 (en) * | 1995-08-11 | 1998-07-09 | Knorr Bremse Systeme | Valve plate for piston compressors, in particular for the generation of compressed air in motor vehicles |
JP3742862B2 (en) * | 2003-03-05 | 2006-02-08 | ダイキン工業株式会社 | Compressor |
JP2005188421A (en) * | 2003-12-26 | 2005-07-14 | Daikin Ind Ltd | Compressor |
AT8188U1 (en) * | 2004-11-02 | 2006-03-15 | Acc Austria Gmbh | REFRIGERANT COMPRESSOR |
-
2008
- 2008-01-17 DE DE102008004809A patent/DE102008004809B4/en not_active Expired - Fee Related
-
2009
- 2009-01-13 AT AT09702133T patent/ATE549514T1/en active
- 2009-01-13 WO PCT/EP2009/000137 patent/WO2009090033A2/en active Application Filing
- 2009-01-13 EP EP09702133A patent/EP2238349B1/en not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2009090033A3 * |
Also Published As
Publication number | Publication date |
---|---|
WO2009090033A3 (en) | 2009-09-24 |
DE102008004809B4 (en) | 2011-03-17 |
WO2009090033A2 (en) | 2009-07-23 |
DE102008004809A1 (en) | 2009-07-23 |
EP2238349B1 (en) | 2012-03-14 |
ATE549514T1 (en) | 2012-03-15 |
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