CN210317669U

CN210317669U - Combined compressor piston

Info

Publication number: CN210317669U
Application number: CN201921372158.6U
Authority: CN
Inventors: 胡峰
Original assignee: Anhui Jinmeida Machinery Co ltd
Current assignee: Anhui Jinmeida Machinery Co ltd
Priority date: 2019-08-22
Filing date: 2019-08-22
Publication date: 2020-04-14
Anticipated expiration: 2029-08-22

Abstract

The utility model provides a combined compressor piston, which comprises a first piston body, a second piston body and a piston connecting rod, wherein one side of the first piston body is provided with a first bulge ring, one side of the second piston body is provided with a second bulge ring, the first bulge ring is sleeved on the outer side of the second bulge ring and is in threaded connection with the outer side of the second bulge ring, the outer side of the second bulge ring is provided with an annular groove, and a sealing groove is formed between the first bulge ring and the side wall of the annular groove; the piston connecting rod comprises a limiting plate and a rod body, the limiting plate is arranged on the inner side of the second bulge ring, a through hole for the rod body to penetrate through is formed in the center of the second piston body, middle sealing grooves which are oppositely arranged are formed between the second piston body and the limiting plate, and a middle sealing ring is accommodated between the two middle sealing grooves which are oppositely arranged; still be fixed with a top sealing ring on the first piston body in first protruding intra-annular, one side of top sealing ring can with the top seal butt of limiting plate, the utility model discloses simple structure, the erection joint is more convenient, and the leakproofness is better, and life is longer.

Description

Combined compressor piston

Technical Field

The utility model relates to a compressor piston, especially a modular compressor piston.

Background

Present compressor piston, for the weight that alleviates piston itself, often can adopt split type hollow structure's casting piston, and link together the two parts of piston through the cylindric lock, and the piston is connected with the connecting rod of piston or directly passes the piston body, and then connect the both ends at the piston body through the nut, also or through pressing into the cylindric lock and connecting, but all comparatively loaded down with trivial details, it is comparatively troublesome to connect, and the connection of cylindric lock, punch on the piston rod because of needs, consequently still easily send out the phenomenon of life stopper connecting rod rupture when the motion.

Therefore, a combined compressor piston which is simple in structure, more convenient to install and connect, better in sealing performance and longer in service life is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a modular compressor piston, simple structure, the erection joint is more convenient, and the leakproofness is better, and life is longer.

The utility model provides a following technical scheme:

a combined compressor piston comprises a first piston body, a second piston body and a piston connecting rod, wherein a first bulge ring is arranged on one side of the first piston body, a second bulge ring is arranged on one side of the second piston body, the first bulge ring is sleeved on the outer side of the second bulge ring in a threaded connection mode, an annular groove is formed in the outer side of the second bulge ring, and a sealing groove for sleeving an outer sealing ring is formed between the first bulge ring and the side wall of the annular groove; the piston connecting rod comprises a limiting plate and a rod body, the limiting plate is arranged on the inner side of the second bulge ring, a through hole for the rod body to penetrate through is formed in the center of the second piston body, middle sealing grooves which are oppositely arranged are formed in the top of the second piston body and the bottom of the limiting plate, and a middle sealing ring is accommodated between the two middle sealing grooves which are oppositely arranged; and a top sealing ring is further fixed on the first piston body in the first bulge ring, and one side of the top sealing ring can be in sealing butt joint with the top of the limiting plate.

Preferably, the second piston body is provided with a cavity inside.

Preferably, the number of the ring grooves is two.

Preferably, the middle sealing ring between the second piston body and the limiting plate is two concentric rings.

Preferably, the first piston body is further provided with at least two fixed thimbles located in the top sealing ring, and the top of the limiting plate is further provided with a thimble matching groove which is matched with the fixed thimbles in an inserting manner.

The utility model has the advantages that: when connecting the piston rod, only need, place the limiting plate in the protruding intra-annular of second, and the body of rod passes the second piston body, middle sealing washer in the middle seal groove is used for realizing the sealed of limiting plate downside, the top sealing ring is used for the auxiliary stay limiting plate, and then realize threaded connection with the first protruding ring on first piston body and the second piston body and the protruding ring of second, connect the external seal ring in the sealed slot that forms, not only increase sealed effect, simultaneously because the both sides of external seal ring crimping respectively on the annular lateral wall of first piston body and second piston body, consequently also greatly increased the degree of difficulty that first piston and second piston body break away from, make during the motion more stable.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, 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 a cross-sectional view of the structure of the present invention about to mate completely;

FIG. 2 is a sectional view of the structure of the present invention when fully engaged;

notation in the figure: 1 is first piston body, 2 is the second piston body, 3 is first bulge loop, 4 is the second bulge loop, 5 is the annular, 6 is sealed slot, 7 is the limiting plate, 8 is the body of rod, 9 is middle seal groove, 10 is the top sealing ring, 11 is the cavity, 12 is fixed thimble.

Detailed Description

With reference to fig. 1 to 2, in this embodiment, the combined compressor piston includes a first piston body 1, a second piston body 2 and a piston rod, wherein a first protruding ring 3 is disposed on one side of the first piston body 1, a second protruding ring 4 is disposed on one side of the second piston body 2, the first protruding ring 3 is screwed on the outer side of the second protruding ring 4, a ring groove 5 is disposed on the outer side of the second protruding ring 4, and a sealing groove 6 for sleeving an external sealing ring is formed between the first protruding ring 3 and the side wall of the ring groove 5; the piston connecting rod comprises a limiting plate 7 and a rod body 8, the limiting plate 7 is arranged on the inner side of the second bulge ring 4, a through hole for the rod body 8 to penetrate through is formed in the center of the second piston body 2, middle sealing grooves 9 which are oppositely arranged are further formed in the top of the second piston body 2 and the bottom of the limiting plate 7, and a middle sealing ring is accommodated between the two middle sealing grooves 9 which are oppositely arranged; a top sealing ring 10 is further fixed on the first piston body 1 in the first bulge loop 3, and one side of the top sealing ring 10 can be in sealing abutment with the top of the limiting plate 7.

The second piston body 2 is provided with a cavity 11 in its interior.

The number of the ring grooves 5 is two.

The middle sealing ring between the second piston body 2 and the limiting plate 7 is two concentric rings.

Two fixed thimbles 12 positioned in the top sealing ring 10 are further arranged on the first piston body 1, and a thimble matching groove matched with the fixed thimbles 12 in an inserting manner is further arranged at the top of the limiting plate 7, so that when the first piston body is assembled, the fixed thimbles 12 are inserted into the thimble matching groove, and the effect of limiting the rotation of the rod body can be achieved.

The utility model discloses a theory of operation is: when connecting the piston rod, only need, place limiting plate 7 in second bulge loop 4, and the body of rod 8 passes second piston body 2, the middle sealing washer in middle seal groove 9 is used for realizing the sealed of limiting plate 7 downside, top sealing ring 10 is used for the auxiliary stay limiting plate 7, and then realize threaded connection with first bulge loop 3 and the second bulge loop 4 on first piston body 1 and the second piston body 2, connect the external seal ring in the sealed slot 6 that forms, not only increase sealed effect, simultaneously because the both sides of external seal ring crimping respectively on the annular 5 lateral walls of first piston body 1 and second piston body 2, consequently also greatly increased the degree of difficulty that first piston 1 and second piston body 2 break away from, make during the motion more stable.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A combined compressor piston is characterized by comprising a first piston body, a second piston body and a piston connecting rod, wherein one side of the first piston body is provided with a first bulge ring, one side of the second piston body is provided with a second bulge ring, the first bulge ring is sleeved on the outer side of the second bulge ring in a threaded connection manner, the outer side of the second bulge ring is provided with a ring groove, and a sealing groove for sleeving an external sealing ring is formed between the first bulge ring and the side wall of the ring groove;

the piston connecting rod comprises a limiting plate and a rod body, the limiting plate is arranged on the inner side of the second bulge ring, a through hole for the rod body to penetrate through is formed in the center of the second piston body, middle sealing grooves which are oppositely arranged are formed in the top of the second piston body and the bottom of the limiting plate, and a middle sealing ring is accommodated between the two middle sealing grooves which are oppositely arranged;

and a top sealing ring is further fixed on the first piston body in the first bulge ring, and one side of the top sealing ring can be in sealing butt joint with the top of the limiting plate.

2. The combined compressor piston of claim 1, wherein a cavity is provided in the interior of said second piston body.

3. The combined compressor piston of claim 1, wherein there are two of said ring grooves.

4. The combined compressor piston of claim 1, wherein the intermediate seal between the second piston body and the retainer plate is two concentric rings.

5. The combined compressor piston according to claim 1, wherein the first piston body further comprises at least two fixed pins disposed in the top sealing ring, and the top of the limiting plate further comprises pin engaging grooves into which the fixed pins are inserted.