CN219993872U

CN219993872U - Compressor piston

Info

Publication number: CN219993872U
Application number: CN202321360474.8U
Authority: CN
Inventors: 李志朋; 羊山百; 谢奎; 代富阳; 周德胜; 曾燕; 余应洪
Original assignee: Chengdu Xinsanye Technology Co ltd
Current assignee: Chengdu Xinsanye Technology Co ltd
Priority date: 2023-05-31
Filing date: 2023-05-31
Publication date: 2023-11-10
Anticipated expiration: 2033-05-31

Abstract

The utility model relates to the technical field of reciprocating piston compressors, and particularly discloses a compressor piston, wherein a first mounting column is arranged in a first piston body, a second mounting column is arranged in a second piston body, a sliding groove is formed in the first mounting column along the axial direction of a piston rod, a mounting groove communicated with the sliding groove is formed in the circumferential direction, and a mounting block capable of sliding along the sliding groove and the mounting groove is arranged on the second mounting column; and a mounting gap with a fixed distance is reserved between the splicing surfaces of the first piston body and the second piston body. Through guaranteeing to be provided with the installation piece in the mounting groove of circumference seting up between the installation, carry out the axial spacing to first piston body and second piston body through the installation piece, bear the axial most of pulling force and extrusion force that first piston body and second piston body produced in reciprocating motion through first erection column and second erection column, play certain guard action to external solder, effectively prolong the life of piston.

Description

Compressor piston

Technical Field

The utility model relates to the technical field of reciprocating piston compressors, in particular to a compressor piston.

Background

A reciprocating piston compressor belongs to a volume compressor, and the piston reciprocating in a cylinder changes working volume to compress gas.

Referring to fig. 1, in the prior art, in order to reduce the mass of a piston and reduce the inertial force of the piston in reciprocating motion, the piston is generally designed as a hollow structure, and for the convenience of manufacturing, the piston is generally divided into two split pistons 8, and finally the two split pistons 8 are welded into a complete piston.

It is readily apparent that such pistons are of a split construction, but the split piston 8 is secured only by welding. In practical application, under the drive of the piston rod, the pistons do reciprocating motion, the split pistons 8 are subjected to different friction forces of the cylinder bodies, the welding flux between the two split pistons 8 is easy to be subjected to axial extrusion force/pulling force of the split pistons, the welding flux is easy to fall off, and the service life of the pistons is shortened.

Disclosure of Invention

In view of the above, the present utility model provides a compressor piston, which aims to reduce the extrusion force/pulling force applied to the outer wall surface of the piston and prolong the practical life of the piston.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

there is provided a compressor piston comprising: the piston comprises a first piston body and a second piston body, wherein the first piston body and the second piston body are of hollow structures, a piston channel for a piston rod to pass through is formed in the first piston body and the second piston body, and annular grooves for installing sealing rings are formed in the outer wall surfaces of the first piston body and the second piston body; a first mounting column is arranged in the first piston body, a second mounting column is arranged in the second piston body, a sliding groove is formed in the first mounting column along the axial direction of the piston rod, a mounting groove communicated with the sliding groove is formed in the circumferential direction, and a mounting block capable of sliding along the sliding groove and the mounting groove is arranged on the second mounting column; and a mounting gap with a fixed distance is reserved between the splicing surfaces of the first piston body and the second piston body.

Further, a first conical surface is provided at an end of the first mounting post, and a second conical surface for fitting with the first conical surface is provided at the second mounting post.

Further, the angle between the first conical surface and the axial direction of the piston rod is 45 degrees.

Further, an installation step for abutting against the first piston body is arranged on the piston rod, and a screw plug for abutting against the second piston body is arranged on one side, away from the first piston body, of the second piston body, and is in threaded connection with the piston rod.

Further, rubber pads are installed between the first piston body and the installation step, and between the screw plug and the second piston body.

Further, a first counter bore for installing a rubber pad is formed in the first piston body, and a second counter bore for installing the rubber pad is formed in the second piston body.

Further, the installation gap is: 0.005-0.01mm.

Further, a V-shaped groove for storing solder is provided on a side of the splicing face away from the piston rod.

Further, a plurality of reinforcing ribs are arranged around the first mounting column and the second mounting column in an array mode.

According to the utility model, the mounting blocks are guaranteed to be arranged in the circumferentially arranged mounting grooves, the first piston body and the second piston body are axially limited through the mounting blocks, most of the axial pulling force and extrusion force generated by the first piston body and the second piston body in the reciprocating motion are born through the first mounting columns and the second mounting columns, a certain protection effect is achieved on external solder, and the service life of the piston is effectively prolonged.

Drawings

Fig. 1 is a schematic diagram of a conventional piston.

Fig. 2 is a front view of a first piston body provided in an embodiment of the present utility model.

Fig. 3 is a cross-sectional view of a first piston body provided in an embodiment of the present utility model.

Fig. 4 is a front view of a second piston body provided in an embodiment of the present utility model.

Fig. 5 is a sectional view of a second piston body provided in an embodiment of the present utility model.

Fig. 6 is a schematic view showing the installation of the first piston body and the second piston body according to the embodiment of the present utility model.

Fig. 7 is a top view of a chute and a mounting slot on a first mounting residence according to an embodiment of the present utility model.

Fig. 8 is an enlarged schematic view at a of fig. 6.

Fig. 9 is an enlarged schematic view at B of fig. 6.

Fig. 10 is an enlarged schematic view at C of fig. 9.

1, a first piston body; 11. a first mounting post; 12. a chute; 13. a mounting groove; 14. a first conical surface; 15. a first counterbore; 2. a second piston body; 21. a second mounting post; 22. a mounting gap; 23. an annular groove; 24. a seal ring; 25. a mounting block; 26. a second conical surface; 27. a second counterbore; 3. a piston rod; 31. mounting steps; 4. a screw plug; 5. a rubber pad; 6. a V-shaped groove; 7. reinforcing ribs; 8. a split piston.

Detailed Description

In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.

Referring to fig. 2 to 8, an embodiment of the present utility model discloses a compressor piston, comprising: the piston comprises a first piston body 1 and a second piston body 2, wherein the first piston body 1 and the second piston body 2 are of hollow structures, a piston channel for a piston rod 3 to pass through is formed in the first piston body 1 and the second piston body 2, and annular grooves 23 for installing sealing rings 24 are formed in the outer wall surfaces of the first piston body 1 and the second piston body 2;

it is to be understood that the sealing rings 24 are installed outside the first piston body 1 and the second piston body 2, the piston and the cylinder body are sealed by the interference contact between the sealing rings 24 and the cylinder body, the sealing rings 24 can be made of polyether-ether-ketone, and the sealing rings 24 perform self-lubrication on the reciprocating motion of the piston.

Referring to fig. 2 to 8, a first mounting post 11 is provided inside the first piston body 1, a second mounting post 21 is provided inside the second piston body 2, a slide groove 12 is provided on the first mounting post 11 in the axial direction of the piston rod 3, a mounting groove 13 communicating with the slide groove 12 is provided in the circumferential direction, and a mounting block 25 slidable along the slide groove 12 and the mounting groove 13 is provided on the second mounting post 21;

during installation, the sliding blocks slide in along the sliding grooves 12, the first piston body 1 and the second piston body 2 are rotated by fixed angles along the circumferential direction relatively until the installation blocks 25 are abutted against the installation grooves 13, and finally the outer parts of the first piston body 1 and the second piston body 2 are welded and fixed.

According to the utility model, the mounting blocks 25 are ensured to be arranged in the circumferentially-arranged mounting grooves 13 through the mounting blocks 25, the first piston body 1 and the second piston body 2 are axially limited, most of the axial pulling force and extrusion force generated by the first piston body 1 and the second piston body 2 in the reciprocating motion are born through the first mounting columns 11 and the second mounting columns 21, a certain protection effect is achieved on external solder, and the service life of the piston is effectively prolonged.

Referring to fig. 6, 9 and 10, a mounting gap 22 with a fixed interval is left between the joint surfaces of the first piston body 1 and the second piston body 2, and a V-shaped groove 6 for storing solder is arranged on one side of the joint surface away from the piston rod 3; by providing the mounting gap 22 and the V-shaped groove 6 to store the solder, the amount of solder used is increased, and the welding firmness of the piston is improved.

Further, the installation gap is: a certain margin is also reserved for the expansion of the first and second piston bodies 1, 2 by providing the mounting gap 22 in 0.005-0.01mm, which generates heat during the piston movement.

Referring to fig. 8, a first conical surface 14 is provided at an end of the first mounting post 11, a second conical surface 26 for fitting with the first conical surface 14 is provided at the second mounting post 21, and an angle between the first conical surface 14 and the axial direction of the piston rod 3 is 45 °; by providing the first conical surface 14 and the second conical surface 26, it is not only ensured that the first piston body 1 and the second piston body 2 are coaxially mounted; when the first piston body 1 and the second piston body 2 receive extrusion force, the axial extrusion force can be towards the radial output part decomposition force, and the axial extrusion force born by the piston is reduced.

Referring to fig. 6, a mounting step 31 for abutting against the first piston body 1 is provided on the piston rod 3, a screw plug 4 for abutting against the second piston body 2 is provided on a side of the second piston body 2 away from the first piston body 1, the screw plug 4 is screwed with the piston rod 3, and the piston can be clamped on the piston rod 3 by the mounting step 31 and the screw plug 4, thereby completing the mounting.

Further, a rubber gasket 5 is installed between the first piston body 1 and the installation step 31 and between the screw plug 4 and the second piston body 2, a first counter bore 15 for installing the rubber gasket 5 is arranged on the first piston body 1, and a second counter bore 27 for installing the rubber gasket 5 is arranged on the second piston body 2; during specific installation, two rubber gaskets can be respectively pressed into the first counter bore 15 and the second counter bore 27 by tightening the screw plug 4, a gap between the piston rod 3 and the piston is sealed, and the installation air tightness of the piston rod 3 and the piston is ensured.

Referring to fig. 2 and 4, a plurality of reinforcing ribs 7 are arranged around the first and second mounting posts 11 and 21 to ensure the strength of the first and second piston bodies 1 and 2.

It will be apparent to those skilled in the art that while preferred embodiments of the present utility model have been described, additional variations and modifications may be made to these embodiments once the basic inventive concepts are known to those skilled in the art. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the utility model. It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A compressor piston comprising: the piston comprises a first piston body (1) and a second piston body (2), wherein the first piston body (1) and the second piston body (2) are of hollow structures, a piston channel for a piston rod (3) to pass through is formed in the first piston body (1) and the second piston body (2), and annular grooves (23) for installing sealing rings (24) are formed in the outer wall surfaces of the first piston body (1) and the second piston body (2);

the piston rod is characterized in that a first mounting column (11) is arranged in the first piston body (1), a second mounting column (21) is arranged in the second piston body (2), a sliding groove (12) is formed in the first mounting column (11) along the axial direction of the piston rod (3), a mounting groove (13) communicated with the sliding groove (12) is formed in the circumferential direction, and a mounting block (25) capable of sliding along the sliding groove (12) and the mounting groove (13) is arranged on the second mounting column (21);

and a mounting gap (22) with a fixed distance is reserved between the splicing surfaces of the first piston body (1) and the second piston body (2).

2. Compressor piston according to claim 1, characterized in that a first conical surface (14) is provided at the end of the first mounting post (11) and a second conical surface (26) for a fitting attachment to the first conical surface (14) is provided at the second mounting post (21).

3. Compressor piston according to claim 2, characterized in that the angle of the first conical surface (14) to the axial direction of the piston rod (3) is 45 °.

4. Compressor piston according to claim 1, characterized in that a mounting step (31) for abutment against the first piston body (1) is provided on the piston rod (3), that a screw plug (4) for abutment against the second piston body (2) is provided on the side of the second piston body (2) remote from the first piston body (1), the screw plug (4) being in threaded connection with the piston rod (3).

5. Compressor piston according to claim 4, characterized in that a rubber pad (5) is mounted between the first piston body (1) and the mounting step (31), between the screw plug (4) and the second piston body (2).

6. Compressor piston according to claim 5, characterized in that a first counterbore (15) is provided on the first piston body (1) for mounting the rubber pad (5), and a second counterbore (27) is provided on the second piston body (2) for mounting the rubber pad (5).

7. The compressor piston of claim 1, wherein the mounting gap is: 0.005-0.01mm.

8. Compressor piston according to claim 7, characterized in that a V-shaped groove (6) for storing solder is provided at the side of the splicing surface remote from the piston rod (3).

9. Compressor piston according to claim 1, characterized in that several ribs (7) are arranged around the first mounting post (11) and the second mounting post (21).