CN219242149U

CN219242149U - Lubrication-free piston assembly for compressor

Info

Publication number: CN219242149U
Application number: CN202320697825.8U
Authority: CN
Inventors: 李志明; 赵品峰; 杨霖
Original assignee: Shanghai Yusheng Compression Machinery Co ltd
Current assignee: Shanghai Yusheng Compression Machinery Co ltd
Priority date: 2023-04-01
Filing date: 2023-04-01
Publication date: 2023-06-23
Anticipated expiration: 2033-04-01

Abstract

The application relates to a lubrication-free piston assembly for a compressor relates to the field of piston technology, and the lubrication-free piston assembly comprises a piston, wherein a pin hole is formed in the piston, a wear reduction groove is formed in the outer side wall of the piston along the circumferential direction, the pin hole is located at the groove bottom of the wear reduction groove, and a wear-resistant ring is arranged in the wear reduction groove, and the diameter of the wear-resistant ring is larger than that of the piston. This application sets up the antifriction groove through the outside at the piston, sets up the wear ring that the diameter is greater than the piston in antifriction inslot, and at normal operating, the piston passes through wear ring and cylinder contact, and wear ring can effectively reduce the wearing and tearing of piston and cylinder to need not to lubricate piston and cylinder, and then effectively improve compressed gas's cleanliness, in order to satisfy food processing's user demand.

Description

Lubrication-free piston assembly for compressor

Technical Field

The application relates to the field of piston technology, in particular to a lubrication-free piston assembly for a compressor.

Background

The piston is an important working part of the piston type compressor, and the compressor comprises a machine body, a cylinder, a piston, a connecting rod and a crankshaft.

In the related art, when the piston reciprocates in the cylinder, an oil hole is formed in the piston pin or the connecting rod, and lubricating oil is introduced between the piston and the inner wall of the cylinder from the oil hole to lubricate the piston and the cylinder.

In the food processing industry, compressed gas is also used as a power source, but when the compressor works, lubricating oil possibly enters a pipeline from the cylinder along with the gas, so that food is polluted. To this end, the inventors provide a lubrication-free piston assembly for a compressor.

Disclosure of Invention

In order to enable the compressor to meet food processing requirements, the application provides a lubrication-free piston assembly for the compressor, lubrication of a piston and a cylinder is not needed, and cleanliness of compressed gas can be effectively improved.

The application provides a lubrication-free piston assembly for compressor adopts following technical scheme:

the utility model provides a lubrication-free piston assembly for compressor, includes the piston, the pinhole has been seted up on the piston, the antifriction groove has been seted up along the circumferencial direction on the lateral wall of piston, the pinhole is located antifriction groove's tank bottom department, be provided with the wear ring in the antifriction groove, wear ring diameter is greater than the piston diameter.

By adopting the technical scheme, the outer side wall of the piston is provided with the wear reduction groove, and the wear-resistant ring with the diameter larger than that of the piston is arranged in the wear reduction groove, so that the wear-resistant ring can be made of wear-resistant materials, the piston is not contacted with the cylinder in the normal operation process, the wear resistance between the piston and the cylinder can be effectively improved, the piston and the cylinder are not required to be lubricated, the cleanliness of compressed gas can be effectively improved, and the food processing use requirement is met; meanwhile, the pin hole of the piston is arranged at the bottom of the wear reduction groove, and in normal operation, the wear-resistant ring can seal the pin hole to prevent compressed gas from leaking from the pin hole, and the wear-resistant ring can also prevent the piston pin from sliding out of the pin hole to scratch the cylinder wall of the cylinder.

Optionally, a V-shaped groove is formed on the side wall of the wear-resistant ring, so that the wear-resistant ring becomes an open ring.

By adopting the technical scheme, the wear-resistant ring is set as the conventional split ring, and in the process of compressing gas by the piston, the piston is tightly pressed at the opening of the wear-resistant ring, so that the abrasion of the opening of the wear-resistant ring is increased, and the compressed gas is easy to leak from the opening; the V-shaped groove is formed in the wear-resistant ring, the annular wall of the wear-resistant ring is overlapped at any position of the V-shaped groove along the length direction of the piston, the wear resistance of the opening of the wear-resistant ring can be effectively improved, meanwhile, the resistance of compressed gas passing through the V-shaped groove is high, and leakage of the compressed gas can be reduced.

Optionally, the antifriction slot has seted up the multichannel along the axis direction of piston, the antifriction ring corresponds the antifriction slot is provided with the multichannel, multichannel the antifriction ring V-arrangement groove staggers the distribution.

By adopting the technical scheme, the plurality of wear-resistant rings are arranged, so that the stress between the piston and the cylinder wall is more uniform, and the wear resistance is improved; the V-shaped grooves of the plurality of wear-resistant rings are distributed in a staggered manner, so that the tightness of the wear-resistant rings can be effectively improved, and compressed gas is prevented from leaking from the V-shaped grooves.

Optionally, a sealing groove is formed in the head of the piston along the circumferential direction, and a sealing ring is arranged in the sealing groove and is an open ring.

Through adopting above-mentioned technical scheme, set up the sealing ring at the piston head, the sealing ring can improve holistic leakproofness.

Optionally, one end of the sealing ring is provided with a sealing protrusion, and the other end of the sealing ring is provided with a sealing groove matched with the sealing protrusion.

Through adopting above-mentioned technical scheme, at piston compressed air's in-process, seal protruding can be compressed tightly on seal groove's cell wall by air to can effectively prevent compressed gas from leaking to wear ring department from the opening part of sealing ring.

Optionally, the seal groove has seted up the multichannel along the axis direction of piston, the sealing ring corresponds the seal groove is provided with the multichannel, the opening of sealing ring staggers each other.

Through adopting above-mentioned technical scheme, set up multichannel sealing ring can effectively improve the sealing performance of piston, stagger the opening of sealing ring each other, can effectively prevent compressed gas from leaking from sealing ring opening part.

Optionally, a wear-reducing ring piece is arranged between the bottom of the sealing groove and the sealing ring, the wear-reducing ring piece is attached to the groove wall of the sealing groove, and the wear-reducing ring piece is an open ring.

Through adopting above-mentioned technical scheme, when piston reciprocating motion, the sealing ring can be in the reciprocating slip of seal groove, sets up the antifriction ring piece at the tank bottom of seal groove, and the antifriction ring piece can effectively reduce the wearing and tearing between the inboard and the seal groove tank bottom of sealing ring.

Optionally, the wear-resistant ring, the sealing ring and the wear-reducing ring piece are tetrafluoroethylene plates.

Through adopting above-mentioned technical scheme, with wear ring, sealing ring and antifriction ring piece setting to the tetrafluoroethylene board, the wearability of tetrafluoroethylene is stronger.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the outer side wall of the piston is provided with the wear reduction groove, the wear-resistant ring with the diameter larger than that of the piston is arranged in the wear reduction groove, the wear-resistant ring can be made of wear-resistant materials, in the normal operation process, the piston is not contacted with the cylinder, the wear resistance between the piston and the cylinder can be effectively improved, so that the piston and the cylinder are not required to be lubricated, the cleanliness of compressed gas can be effectively improved, the food processing use requirement is met, meanwhile, the pin hole of the piston is arranged at the bottom of the wear reduction groove, the wear-resistant ring can seal the pin hole to prevent the compressed gas from leaking from the pin hole during normal operation, and the wear-resistant ring can also prevent the piston pin from sliding out of the cylinder wall of the scratch cylinder from the pin hole;

2. by arranging the sealing bulge and the sealing groove at the end part of the sealing ring, the sealing bulge can be pressed on the groove wall of the sealing groove by air in the process of compressing air by the piston, so that the compressed air can be effectively prevented from leaking from the opening of the sealing ring to the wear-resistant ring;

3. through set up the antifriction ring piece at the tank bottom of seal groove, when piston reciprocating motion, the sealing ring can be in the reciprocating slip of seal groove, and the antifriction ring piece can effectively reduce the wearing and tearing between sealing ring inboard and the seal groove tank bottom.

Drawings

FIG. 1 is a schematic overall structure of an embodiment of the present application;

FIG. 2 is a cross-sectional view of an embodiment of the present application;

FIG. 3 is a block diagram of a seal ring according to an embodiment of the present application;

fig. 4 is an enlarged view of the area a in fig. 2.

Reference numerals: 1. a piston; 11. a grinding reduction groove; 12. a pin hole; 13. an air inlet; 14. an intake valve; 15. sealing grooves; 2. a wear ring; 21. a V-shaped groove; 3. a seal ring; 31. a sealing protrusion; 32. sealing the groove; 4. and (5) a wear-reducing ring piece.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-4.

The embodiment of the application discloses a lubrication-free piston assembly for a compressor, and referring to fig. 1 and 2, the lubrication-free piston assembly comprises a piston 1 and a wear-resistant ring 2 arranged on the piston 1. The skirt part of the piston 1 is provided with a wear reduction groove 11 along the circumferential direction of the piston 1, and the wear reduction ring is a cylindrical sleeve made of tetrafluoroethylene plates; the side wall of the antifriction ring is provided with a V-shaped groove 21, so that the antifriction ring is an open ring, the antifriction ring is convenient to install in the antifriction groove 11, and the outer diameter of the antifriction ring is larger than that of the piston 1; the antifriction slot 11 is provided with two channels along the axial direction of the piston 1, and the bottom of the antifriction slot 11 near the top of the piston 1 is provided with a pin hole 12 for installing a piston pin. When the wear rings are installed, the V-shaped grooves 21 of the two wear rings are required to be installed in a staggered way by 90-180 degrees, so that the compressed gas is prevented from leaking from the V-shaped grooves 21 directly.

An air inlet 13 communicated with the inner cavity of the piston 1 is formed in the top of the piston 1 in a penetrating way, an air inlet valve 14 is arranged at the air inlet 13, and air can be introduced into the cylinder from the top of the piston 1 during normal operation.

Referring to fig. 2 and 3, a sealing groove 15 is formed in the head of the piston 1 along the circumferential direction, and two sealing grooves 15 are formed along the axial direction of the piston 1; a sealing ring 3 is arranged in the sealing groove 15, and the sealing ring 3 is an opening ring made of tetrafluoroethylene plates; a sealing protrusion 31 is integrally arranged at one end of the sealing ring 3, a sealing groove 32 is formed at the other end of the sealing ring 3, and the sealing protrusion 31 is inserted into the sealing groove 32. During the compression of the gas by the piston 1, the sealing protrusion 31 is pressed against the wall of the sealing groove 32 by the gas, preventing the leakage of the compressed gas from the opening of the sealing ring 3. When the sealing ring 3 is installed, the openings of the sealing ring 3 need to be installed in a staggered manner by 90 degrees to 180 degrees, and the adjacent sealing ring 3 and the wear-resistant ring 2 need to be installed in a staggered manner.

Referring to fig. 2 and 4, a wear-reducing ring piece 4 is installed between the groove bottom of the seal groove 15 and the seal ring 3, the wear-reducing ring piece 4 is an open ring made of tetrafluoroethylene plate, the thickness of the wear-reducing ring piece 4 is smaller than that of the seal ring 3, the upper side and the lower side of the wear-reducing ring piece 4 are attached to the groove wall of the seal groove 15, and the outer side wall of the wear-reducing ring piece 4 is attached to the inner side wall of the seal ring 3. When the piston 1 reciprocates in the cylinder, the sealing ring 3 can slide up and down in the sealing groove 15 when the piston 1 commutates between the upper dead point and the lower dead point, and the wear between the inner side of the sealing ring 3 and the bottom of the sealing groove 15 can be effectively reduced by the wear-reducing ring piece 4.

The embodiment of the application discloses a lubrication-free piston assembly for compressor's implementation principle does: through setting up sealing ring 3 and wear-resisting ring 2 on piston 1, when the compressor normally operates, piston 1 can not with cylinder direct contact, and wear-resisting ring 2 and sealing ring 3 are the tetrafluoroethylene material, and wear-resisting ring 2 and sealing ring 3 can effectively improve the wearability between piston 1 and the cylinder to need not to lubricate between piston 1 and the cylinder, and then improved compressed gas's cleanliness, make the compressor accord with food processing standard. Meanwhile, the wear-resistant ring 2 can prevent the piston pin from sliding out of the pin hole 12 to scratch the cylinder in the working process.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. Lubrication-free piston assembly for compressor, including piston (1), offer pinhole (12), its characterized in that on piston (1): the anti-friction device is characterized in that an anti-friction groove (11) is formed in the outer side wall of the piston (1) along the circumferential direction, the pin hole (12) is located at the groove bottom of the anti-friction groove (11), a wear-resistant ring (2) is arranged in the anti-friction groove (11), and the diameter of the wear-resistant ring (2) is larger than that of the piston (1).

2. A lubrication-free piston assembly for a compressor as set forth in claim 1, wherein: the side wall of the wear-resistant ring (2) is provided with a V-shaped groove (21) so that the wear-resistant ring (2) becomes an open ring.

3. A lubrication-free piston assembly for a compressor as set forth in claim 2, wherein: the anti-friction groove (11) is provided with a plurality of channels along the axial direction of the piston (1), the anti-friction ring (2) is provided with a plurality of channels corresponding to the anti-friction groove (11), and the V-shaped grooves (21) of the anti-friction ring (2) are distributed in a staggered mode.

4. A lubrication-free piston assembly for a compressor as set forth in claim 1, wherein: the head of the piston (1) is provided with a sealing groove (15) along the circumferential direction, a sealing ring (3) is arranged in the sealing groove (15), and the sealing ring (3) is an open ring.

5. A lubrication-free piston assembly for a compressor as set forth in claim 4, wherein: one end of the sealing ring (3) is provided with a sealing bulge (31), and the other end of the sealing ring (3) is provided with a sealing groove (32) matched with the sealing bulge (31).

6. A lubrication-free piston assembly for a compressor as set forth in claim 4, wherein: the sealing groove (15) is provided with a plurality of channels along the axial direction of the piston (1), the sealing ring (3) is provided with a plurality of channels corresponding to the sealing groove (15), and the openings of the sealing ring (3) are staggered.

7. A lubrication-free piston assembly for a compressor as set forth in claim 4, wherein: the anti-friction sealing device is characterized in that a friction reducing ring piece (4) is arranged between the bottom of the sealing groove (15) and the sealing ring (3), the friction reducing ring piece (4) is attached to the groove wall of the sealing groove (15), and the friction reducing ring piece (4) is an open ring.

8. A lubrication-free piston assembly for a compressor as set forth in claim 7, wherein: the wear-resistant ring (2), the sealing ring (3) and the wear-resistant ring piece (4) are tetrafluoroethylene plates.