CN110242546B - Suction valve without clearance volume arranged on reciprocating compressor piston - Google Patents
Suction valve without clearance volume arranged on reciprocating compressor piston Download PDFInfo
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- CN110242546B CN110242546B CN201910677929.0A CN201910677929A CN110242546B CN 110242546 B CN110242546 B CN 110242546B CN 201910677929 A CN201910677929 A CN 201910677929A CN 110242546 B CN110242546 B CN 110242546B
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- piston
- valve plate
- suction valve
- reciprocating compressor
- top surface
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- 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
- F04B39/0005—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 adaptations of pistons
- F04B39/0016—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 adaptations of pistons with valve arranged in the piston
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- 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
- F04B39/102—Adaptations or arrangements of distribution members the members being disc valves
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- 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
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/122—Cylinder block
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- 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
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/125—Cylinder heads
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
Abstract
The invention discloses a suction valve without clearance volume arranged on a piston of a reciprocating compressor, comprising: the suction valve plate is arranged on a valve plate on the top surface of the piston at the end part of the piston of the reciprocating compressor; the air suction valve plate comprises a plurality of strip cantilever plates; the valve plate on the top surface of the piston is provided with a plurality of air suction through holes which are correspondingly matched with the strip-shaped cantilever sheets of the air suction valve plate; the lift limiter ferrule is arranged on a valve plate on the top surface of the piston of the reciprocating compressor; the outer end of the strip cantilever piece of the air suction valve plate is provided with a flange; a plurality of pits capable of accommodating the tail ends of the strip-shaped cantilever pieces of the air suction valve plates are formed in the end face of the inner side of the lift limiter ferrule; the stroke of the flange is limited between the lift limiter ferrule and the valve plate on the top surface of the piston. The invention has a lift limiter without forming an airflow channel with clearance volume, and solves the problems that in the prior structure: the air flow channel between the disc-shaped baffle plate and the piston causes the technical problem of the clearance volume of the residual high-pressure air.
Description
Technical Field
The invention belongs to the field of power machinery, and particularly relates to a suction valve structure without a residual clearance volume, which is arranged on a piston of a reciprocating compressor.
Background
In the micro single-acting piston compressor, the arrangement of the air valve on the cylinder cover is limited by the size of the cylinder cover, and the sufficient flow area of the air valve is difficult to obtain. On the other hand, the intake valve is disposed adjacent to the exhaust gas, and heating of the intake gas by the high temperature of the exhaust gas is easily generated. Resulting in increased suction temperature and increased power consumption. For the micro oil-free lubrication single-action piston type air compressor, the air suction valve is arranged on the piston without involving the problem of oil content of sucked gas, so that the flow area of the air suction valve and the air discharge valve can be increased, the lift range of the valve plate is reduced, and the cooling of the bearing by the sucked gas flowing in the crankcase is particularly facilitated. The service life of the grease lubrication bearing can be effectively prolonged, and on the other hand, the suction noise of the air compressor is favorably reduced.
The traditional piston compressor is also provided with a structure that an air valve is arranged on a piston, but most of the traditional piston compressor is not provided with a lift limiter or a baffle of a valve plate, and is also provided with a structure that a suction valve of the piston is provided with a valve plate baffle, but an air flow channel is reserved between the existing disc-shaped baffle and the piston, and the channel is the clearance volume of residual high-pressure air. At present, under the condition that a user requires a single-stage pressure ratio to be larger and larger, the clearance volume of an air suction valve of a micro piston air compressor is reduced, and the method is particularly important.
Disclosure of Invention
The object of the present invention is to provide a suction valve of non-clearance volume arranged on the piston of a reciprocating compressor, which has a lift limiter without an air flow channel forming a clearance volume, to solve the above technical problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
a suction valve for a gapless volume disposed on a piston of a reciprocating compressor comprising:
the suction valve plate is arranged on a valve plate on the top surface of the piston at the end part of the piston of the reciprocating compressor; the air suction valve plate comprises a plurality of strip cantilever plates; the valve plate on the top surface of the piston is provided with a plurality of air suction through holes which are correspondingly matched with the strip-shaped cantilever sheets of the air suction valve plate;
the lift limiter ferrule is arranged on a valve plate on the top surface of the piston of the reciprocating compressor; the outer end of the strip cantilever piece of the air suction valve plate is provided with a flange; a plurality of pits capable of accommodating the tail ends of the strip-shaped cantilever pieces of the air suction valve plates are formed in the end face of the inner side of the lift limiter ferrule; the stroke of the flange is limited between the lift limiter ferrule and the valve plate on the top surface of the piston.
Furthermore, the air suction valve plate is in a plum petal shape and is connected into a whole in the center.
Furthermore, the section shape of the lift limiter ferrule is L-shaped; the excircle of the valve plate on the top surface of the piston is provided with a circular shoulder; the lift limiter ferrule is hot-sleeved on the circular shoulder.
Furthermore, the center of the air suction valve plate is fixed on the valve plate on the top surface of the piston through a valve plate fastening screw.
Further, the reciprocating compressor includes a cylinder and a cylinder cover plate; the reciprocating compressor piston is arranged in the cylinder; the side wall of the piston of the reciprocating compressor is in sealed sliding connection with the inner wall of the cylinder through a sliding plug ring; the cylinder is fixedly connected with a cylinder cover plate.
Furthermore, a circular pit is arranged at the center of the cylinder head end plate and used for accommodating a screw cap of a valve plate fastening screw.
Furthermore, an annular groove is dug on the end plate of the cylinder cover corresponding to the position of the annular lift limiter ring higher than the top surface of the piston of the reciprocating compressor and used for accommodating the lift limiter ring.
Furthermore, the inner side surface of the lift limiter ferrule is 3-6 mm higher than the top surface of the piston top surface valve plate.
Furthermore, the thickness of the air suction valve plate is 0.2-0.5 mm.
Further, the lift limiter ring is made of filled polytetrafluoroethylene or polyether ether ketone, and is arranged on a valve plate on the top surface of a piston of the reciprocating compressor in an interference mode through a shrink fit method.
Compared with the prior art, the invention has the following beneficial effects:
a circular shoulder is dug at the outer circle of the top end surface of the piston, an annular ferrule with an L-shaped section is fixedly arranged on the shoulder, and the shoulder of an inner hole of the ferrule is matched with the shoulder on the top end surface of the piston. The ferrule is about 3-6 mm higher than the top surface of the piston; a plurality of grooves for accommodating crescent flanges of the valve plates are dug on the end surface of the inner side of the part, contacting with the top surface of the piston, of the ferrule, the axial height of each groove is the sum of the lift of the valve plate and the thickness of the valve plate, and the groove is a lift limiting space of the valve plate. An annular channel is cut into the end plate of the cylinder head adjacent the top of the piston, corresponding to the location of the annular collar above the top surface of the piston, for receiving the collar. A circular pit is arranged at the center of the cylinder head end plate to accommodate a screw cap for fixing the valve plate. Thereby reducing and eliminating the clearance volume of the suction valve.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is an assembled view of a compressor cylinder and gas valve in accordance with the present invention;
11-piston top face valve plate; 12-valve plate fastening screw; 13-cylinder cover plate; 14-a cylinder head;
15-an exhaust valve; 16-a valve plate; 17-lift limiter collar; 18-a suction through hole; 19-a cylinder;
20-a piston ring;
FIG. 2 is a front view of a valve plate lift limiter on a piston;
FIG. 3 is a cross-sectional view of a valve plate lift limiter on a piston;
FIG. 4 is a diagram of the relative positions of an eight-flap valve plate structure and a valve opening;
FIG. 5 is a diagram of the relative positions of a hexavalve flap structure and a valve orifice;
FIG. 6 is a front view of a lift limiter for a six-lobe valve plate.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The following detailed description is exemplary in nature and is intended to provide further details of the invention. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention.
Referring to fig. 1 to 3, for the first-stage cylinder of the single-acting piston type air compressor, the piston top surface valve plate 11 of the first-stage piston is used as the valve plate of the suction valve, the suction valve plate 16 is installed on the piston top surface valve plate 11, the suction valve plate 16 is a strip-shaped cantilever plate (reed valve plate) like a plum petal shape, the outer end of the cantilever plate is provided with a crescent flange 160, the center part of the suction valve plate 16 is connected into a whole, each strip-shaped cantilever plate is radial and evenly distributed near the outer edge of the circumference of the piston, the suction through hole 18 corresponding to the plum petal position of the valve plate is processed on the piston top surface valve plate 11, so that the top end part of the valve plate can cover the suction through hole 18. A threaded hole is arranged in the center of the axis of the piston, and a valve plate fastening screw 12 is adopted to fasten an air suction valve plate 16 on a valve plate 11 on the top surface of the piston. The thickness of the air suction valve plate 16 is generally 0.2-0.5 mm. A circular shoulder is dug at the outer circle of the top end surface of the piston, a lift limiter ferrule 17 with an L-shaped section and an annular shape is installed on the shoulder in a shrink fit mode, and the shoulder of an inner hole of the lift limiter ferrule 17 is matched with the shoulder of the outer circle of the top end of the piston. The lift limiter ferrule 17 is 3-6 mm higher than the top surface of the piston top surface valve plate 11; a plurality of pits 21 for accommodating crescent flanges 160 of the air suction valve plate 16 are dug on the inner side end surface of the part of the lift limiter ferrule 17 contacting with the top surface of the piston, the shape of each pit is just like a crescent, the height of each pit in the axial direction of the lift limiter ferrule 17 is the sum of the lift of the valve plate and the thickness of the valve plate, and each pit 21 is a lift limiting space of the air suction valve plate 16. An annular channel 130 is cut in the cylinder head end plate 13 adjacent to the top of the piston, corresponding to the position of the annular lift limiter collar 17 above the top surface of the piston, for receiving the lift limiter collar 17. A circular recess is provided in the center of the cylinder head end plate 13 to receive a screw cap of a valve plate fastening screw 12 for fixing the valve plate. Thereby reducing and eliminating the clearance volume of the suction valve.
Before assembly, all parts are machined, a heated lift limiter ferrule 17 is sleeved on a piston, all plum petals of an air suction valve plate 16 are bent downwards to reduce the outer diameter of the top end of the air suction valve plate, the plum petals are inserted into a pit 21 on the lift limiter ferrule 17 from the lift limiter ferrule 17, a palm center part in the center of the air suction valve plate 16 is cut and fastened to the top surface of the piston, and the air suction valve plate is fastened by a valve plate fastening screw 12.
When the air suction valve plate 16 needs to be disassembled again, the valve plate fastening screw 12 on the air suction valve plate 16 is loosened and removed, a hook with two sides capable of being bounced is inserted into a screw hole on the air suction valve plate 16, the air suction valve plate 16 is hooked and pulled upwards, and the air suction valve plate 16 can be bent like an umbrella and taken out of a pit 21 in the lift limiter ferrule 17.
The lift limiter ferrule 17 is made of filled polytetrafluoroethylene or polyether ether ketone and is arranged on the end face of the piston of the reciprocating compressor in an interference mode through a shrink fit method. The plastic material can reduce the knocking sound of the lift limiter when the valve plate is opened.
Please refer to fig. 4, which is a schematic diagram of the relative positions of the eight-flap valve plate structure and the valve hole; FIG. 5 is a diagram of the relative positions of a hexavalve flap structure and a valve orifice; fig. 6 is a front view of the lift limiter 17 in cooperation with the hexapetalous valve piece.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Claims (7)
1. A suction valve for a gapless volume disposed on a piston of a reciprocating compressor comprising:
a suction valve plate (16) installed on a piston top surface valve plate (11) at the end of the reciprocating compressor piston; the air suction valve plate (16) comprises a plurality of strip cantilever plates; a valve plate (11) on the top surface of the piston is provided with a plurality of air suction through holes (18) which are correspondingly matched with the strip-shaped cantilever pieces of the air suction valve plate (16);
a lift limiter ferrule (17) mounted on a piston top surface valve plate (11) of the reciprocating compressor piston; the outer end of the strip cantilever piece of the air suction valve plate (16) is provided with a flange (160); a plurality of pits (21) capable of accommodating the tail ends of strip-shaped cantilever sheets of the air suction valve sheet (16) are formed in the end face of the inner side of the lift limiter ferrule (17); the displacement stroke of the flange (160) is the lift of the valve plate, and the displacement stroke of the flange (160) is determined by the height of the pit (21) of the lift limiter ferrule (17) in the axial direction of the lift limiter ferrule (17);
the reciprocating compressor comprises a cylinder (19) and a cylinder cover plate (13); the reciprocating compressor piston is arranged in the cylinder (19); the side wall of the piston of the reciprocating compressor is in sealed sliding connection with the inner wall of the cylinder (19) through a sliding plug ring (20); a cylinder cover plate (13) is fixedly connected to the cylinder (19);
a circular concave pit is arranged at the center of the cylinder head end plate (13) and used for accommodating a screw cap of a valve plate fastening screw (12);
an annular groove (130) is dug on the end plate (13) of the cylinder cover corresponding to the position of the annular lift limiter collar (17) higher than the top surface of the piston of the reciprocating compressor and used for accommodating the lift limiter collar (17).
2. A suction valve with zero residual volume arranged on the piston of a reciprocating compressor according to claim 1, characterized in that the suction flap (16) is in the shape of a petaloid, centrally integrated.
3. A suction valve of zero clearance volume arranged on the piston of reciprocating compressor according to claim 1, characterized in that the lift limiter collar (17) has a cross section shape of L-shape; an annular shoulder is arranged at the excircle of the piston top surface valve plate (11); the lift limiter ferrule (17) is sleeved on the circular annular shoulder in a hot mode.
4. A suction valve with zero residual volume arranged on the piston of reciprocating compressor according to claim 1, characterized in that the center of the suction valve plate (16) is fixed on the valve plate (11) on the top surface of the piston by the plate fastening screw (12).
5. A suction valve of a non-clearance volume arranged on a piston of a reciprocating compressor in accordance with claim 1, wherein an inner side surface of the lift limiter collar (17) is higher than a top surface of the piston top surface valve plate (11) by 3 to 6 mm.
6. A suction valve with zero clearance volume arranged on the piston of reciprocating compressor according to claim 1, characterized in that the thickness of the suction valve plate (16) is 0.2-0.5 mm.
7. A suction valve with zero residual volume arranged on the piston of reciprocating compressor according to claim 1, characterized by that the lift limiter collar (17) is made of filled teflon or polyetheretherketone, which is fitted by shrink-fitting on the valve plate (11) of the top surface of the piston of reciprocating compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910677929.0A CN110242546B (en) | 2019-07-25 | 2019-07-25 | Suction valve without clearance volume arranged on reciprocating compressor piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910677929.0A CN110242546B (en) | 2019-07-25 | 2019-07-25 | Suction valve without clearance volume arranged on reciprocating compressor piston |
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| Publication Number | Publication Date |
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| CN110242546A CN110242546A (en) | 2019-09-17 |
| CN110242546B true CN110242546B (en) | 2020-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910677929.0A Active CN110242546B (en) | 2019-07-25 | 2019-07-25 | Suction valve without clearance volume arranged on reciprocating compressor piston |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110594134B (en) * | 2019-10-18 | 2021-01-12 | 青岛万宝压缩机有限公司 | Piston and air suction valve assembly for linear compressor and compressor |
| CN113550888B (en) * | 2021-07-27 | 2023-02-10 | 福建空分气体有限公司 | Compression cylinder structure for piston compressor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2432355Y (en) * | 2000-03-29 | 2001-05-30 | 柳州市通用机械总厂 | Strip aspirator pump for compressor |
| JP2005155382A (en) * | 2003-11-21 | 2005-06-16 | Sanden Corp | Compressor |
| CN104696193B (en) * | 2015-02-11 | 2017-02-01 | 合肥通用机械研究院 | Combined piston for air compressor |
| KR102238345B1 (en) * | 2016-05-03 | 2021-04-09 | 엘지전자 주식회사 | Linear compressor |
| CN108708844B (en) * | 2018-05-24 | 2020-07-07 | 江苏昊科汽车空调有限公司 | High-performance compressor valve group device and inclined plate type air-conditioning compressor |
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