CN213870186U

CN213870186U - Multi-body piston

Info

Publication number: CN213870186U
Application number: CN202022640791.8U
Authority: CN
Inventors: 岳伟; 王孝磊; 沈卫兵; 白文超; 徐海; 王辉
Original assignee: Enric Bengbu Compressor Co Ltd
Current assignee: Enric Bengbu Compressor Co Ltd
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2021-08-03
Anticipated expiration: 2030-11-16

Abstract

The utility model provides a many pistons, it includes piston rod (1), and the cover is equipped with packing ring (2), first piston body (3) in proper order on piston rod (1), at first piston body (3), supporter (4), second piston body (5), insurance gasket (6) and correspond complex lock nut (7). The utility model has the advantages of simple structure, convenient manufacture, firmness, durability, flexible adjustment of the specific gravity of the piston and the like.

Description

Multi-body piston

The technical field is as follows:

the utility model relates to a reciprocating piston compressor technical field, especially a multi-body piston.

Background art:

at present, the reciprocating piston type compressor is widely applied in the industrial field, a main machine of the compressor is used as the core of the whole compressor system, and the design and the manufacturing level of the main machine of the compressor directly influence the operation of related industrial products.

The piston part is an important part of a compressor main machine, the general piston part comprises a piston rod, a piston body, a piston ring, a supporting ring and a locking nut, the weight of each row of piston parts is generally required to be consistent except for a single row of compressor, the general piston body is mostly made of steel, iron and cast aluminum, the diameters of multiple rows of piston cylinders are generally different, and different materials can be selected according to calculation in order to ensure that the weight of each row of pistons is the same. However, the piston wear resistance is poor if a cast aluminum piston is selected, and the weight of a steel piece or a cast aluminum piston is too large.

The utility model has the following contents:

the utility model discloses just, in order to overcome not enough among the prior art, provide a many pistons.

The application provides the following technical scheme:

a multi-body piston, it includes the piston rod, its characterized in that: the piston rod is sequentially sleeved with a gasket, a first piston body, a supporting body, a second piston body, a safety gasket and a locking nut which is correspondingly matched with the supporting body.

On the basis of the technical scheme, the following further technical scheme can be provided:

the supporting body comprises a supporting cylinder, two ends of the supporting cylinder are respectively provided with an annular boss, two end faces of the supporting cylinder outside the annular boss are respectively provided with an annular groove which is coaxially distributed, and a group of second through holes communicated with the two annular grooves are uniformly distributed on the bottom surface of the annular groove; and a third ring groove, a fourth ring groove, a fifth ring groove and a sixth ring groove are arranged on the outer circular surface of the supporting cylinder, first piston rings are respectively sleeved on the third ring groove, the fourth ring groove and the sixth ring groove, and a supporting ring is arranged on the fifth ring groove.

The piston rod include be equipped with the circular dog of coaxial distribution on the piston rod, be equipped with first annular on the body of rod of circular dog, be equipped with screw thread section and second annular in proper order on one side of first annular, the equipartition has a set of first through-hole on the cell wall of second annular.

Utility model advantage:

the utility model has the advantages of simple structure, convenient manufacture, firmness, durability, flexible adjustment of the specific gravity of the piston and the like.

Description of the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an exploded view of the structure of the present invention;

FIG. 3 is a sectional view of the structure of the present invention;

FIG. 4 is a schematic view of a supporting circle in the structure of the present invention;

fig. 5 is a sectional view a-a in fig. 4.

The specific implementation mode is as follows:

as shown in fig. 1-5, a multi-body piston comprises a piston rod 1, a washer 2 is sleeved on the piston rod 1, a first piston body 3, a supporting body 4, a second piston body 5 and a safety gasket 6 are sequentially sleeved on the piston rod 1 at one side of the washer 2, and a locking nut 7 correspondingly matched with the end of the piston rod 1 is sleeved on the end of the piston rod 1 at one side of the safety gasket 6.

A coaxially distributed circular stop 1b is connected to the piston rod 1. The diameter of the rod body 1a at one side of the circular stop block 1b is smaller than that of the rod body at the other side.

The end part of one end of the rod body 1a on one side of the circular stop block 1b is provided with a section of threaded section 1c, the rod body 1a at one end of the threaded section 1c is provided with a first annular groove 1d, and the rod body 1a at the other end of the threaded section 1c is provided with a second annular groove 1 e.

A group of first through holes 1f are uniformly distributed on the wall of the second ring groove 1 e. The axes of all the first through holes 1f are in the same plane and intersect with the axis of the rod body 1a, and the plane is perpendicular to the axis of the rod body 1 a. The rod body 1a, the circular stop block 1b, the first annular groove 1d, the thread section 1c and the second annular groove 1e are integrally manufactured. The first annular groove 1d is a tool withdrawal groove in the process of machining the thread section 1c and is used for tool withdrawal abdicating after the thread section 1c is machined.

The washer 2 is sleeved on the rod body 1a between the circular stop block 1b and the threaded section 1c, a groove 2a which is coaxially distributed is formed in one side of the washer 2, and the groove 2a is correspondingly matched with the circular stop block 1b so that the circular stop block 1b can be clamped into the groove 2 a. So that the circular stop 1b forms a limit fit for the washer 2. The gasket 2 is made of forty-five steel.

The rod body 1a of the other side of the gasket 2 is sleeved with a first piston body 3, and one side end face of the first piston body 3 is provided with an annular groove 3a correspondingly matched with the gasket 2, so that the gasket 2 is embedded into the first piston body 3. The first piston body 3 is made of aluminum alloy ZL401 through casting so as to meet the requirement of counterweight. An annular slot 3b is coaxially arranged at the other end of the first piston body 3.

The rod body 1a on the other side of the first piston body 3 is sleeved with a supporting body 4, and the supporting body 4 is made of forty-five steel materials. The support body 4 comprises a support cylinder 4c having the same diameter as the first piston body 3. Two ends of the supporting cylinder 4c are respectively provided with an integrally formed annular boss 4 k. The end face annular grooves 4t which are coaxially distributed are respectively formed in the end faces of the two ends of the supporting cylinder 4c outside the annular boss 4k, a group of second through holes 4d which are communicated with the two end face annular grooves 4t are evenly distributed on the bottom face of the fifth annular groove 4t, the second through holes 4d are circumferentially distributed in the annular grooves, and the axis of each second through hole 4d is parallel to the axis of the rod body 1 a. The weight of the support body 4 is adjusted by processing the diameter of the second through hole 4d, if the weight of the support body 4 is too large, the diameter of the second through hole 4d is processed to be larger, so that the weight of the support body 4 is reduced, if the weight of the support body 4 is too small, a tapping screw is additionally arranged on the second through hole 4d to increase the weight of the second through hole, and further, the weight of the multi-body piston component is adjusted, so that the multi-body piston meets the requirements of design regulation.

The annular boss 4k at one end of the supporting cylinder 4c is inserted into the slot 3b, and the height of the annular boss 4k is smaller than the depth of the slot 3b, so that a gap between the first piston body 3 and one end of the supporting cylinder 4c can be avoided when the annular boss 4k is inserted into the slot 3 b.

From left to right, be equipped with third annular 4e, fourth annular 4f, fifth annular 4g and sixth annular 4h coaxially in proper order on the excircle face of support cylinder 4c, the width of third annular 4e, fourth annular 4f and sixth annular 4h equals, the width of sixth annular 4h is greater than the width of third annular 4 e.

The first piston ring 4a corresponding to the ring groove width is sleeved on the third ring groove 4e, the fourth ring groove 4f and the sixth ring groove 4h respectively, a certain gap is reserved between the inner circular surface of the first piston ring 4a and the groove bottom of the corresponding ring groove, so that the first piston ring 4a is provided with a retraction allowance when being extruded, and the service life of the first piston ring 4a is prolonged on the premise of ensuring the sealing performance of the first piston ring 4 a. The first piston ring 4a is not pressed so that its outer circumferential surface protrudes beyond the outer circumferential surface of the support cylinder 4 c.

A support ring 4b is arranged on the fifth ring groove 4g, and the inner circular surface of the support ring 4b is attached to the bottom of the fifth ring groove 4 g. A group of inclined grooves 4j are uniformly distributed on the outer surface of the support ring 4b, air pressure at two ends of the multi-body piston can be balanced through the inclined grooves 4j, and vibration is reduced. The outer circumferential surface of the support ring 4b protrudes beyond the outer circumferential surface of the support cylinder 4 c.

The rod body 1a on one side of the supporting body 4 is sleeved with a second piston body 5, the second piston body 5 is connected with one end face of the supporting body 4, the outer diameter of the second piston body 5 is consistent, and the second piston body 5 is made of cast aluminum alloy ZL401, so that the requirement of counterweight can be met conveniently. An installation groove 5a correspondingly matched with the annular boss 4k at the other end of the support cylinder 4c is arranged at one end of the second piston body 5.

A gasket mounting groove 5b which is coaxially distributed is formed in the other end of the second piston body 5, an annular safety gasket 6 is correspondingly mounted in the mounting groove 5b, the safety gasket 6 comprises a gasket 6a, the gasket 6a is made of 45 steel, and the gasket 6a is fixed in the mounting groove 5b in a mode that a bolt 6b is inserted into a hole in the gasket 6a and a positioning hole in the bottom of the mounting groove 5 b. The inner hole wall of the safety gasket 6 corresponds to the first ring groove 1 d.

The locking nut 7 correspondingly matched with the threaded section 1c on one side of the safety gasket 6 is sleeved with the threaded section 1c, the locking nut 7 comprises a nut 7a, one end of the nut 7a is provided with a cylindrical extending part which is coaxially distributed, a group of nut grooves 7b corresponding to the first through hole 1f are uniformly distributed on the extending part, a bolt 7c correspondingly matched with the female groove 7b and the first through hole 1f is further arranged, and one end of the bolt 7c is provided with a flanging correspondingly matched with the nut grooves 7 b. After the locking nut 7 is screwed, the plug pin 7c is inserted into the corresponding first through hole 1f through the nut groove 7b, and then the side wall of the nut groove 7b is clamped by the flanging to be fixed, so that the nut 7a is prevented from being loosened due to long-term operation of the piston.

Claims

1. A multi-body piston, it includes piston rod (1), its characterized in that: the piston rod (1) is sequentially sleeved with a gasket (2), a first piston body (3), a supporting body (4), a second piston body (5), a safety gasket (6) and a locking nut (7) which is correspondingly matched with the safety gasket.

2. A multi-body piston as claimed in claim 1, wherein: the supporting body (4) comprises a supporting cylinder (4 c), two ends of the supporting cylinder (4 c) are respectively provided with an annular boss (1 k), two end faces of the supporting cylinder (4 c) at the outer side of the annular boss (1 k) are respectively provided with an annular groove which is coaxially distributed, and a group of second through holes (4 d) which are communicated with the two annular grooves are uniformly distributed on the bottom surface of the annular groove; the outer circle surface of the supporting cylinder (4 c) is provided with a third ring groove (4 e), a fourth ring groove (4 f), a fifth ring groove (4 g) and a sixth ring groove (4 h), the third ring groove (4 e), the fourth ring groove (4 f) and the sixth ring groove (4 h) are respectively sleeved with a first piston ring (4 a), and the fifth ring groove (4 g) is provided with a supporting ring (4 b).

3. A multi-body piston as claimed in claim 1, wherein: piston rod (1) including be equipped with circular dog (1 b) of coaxial distribution on piston rod (1), be equipped with first annular (1 d) on the body of rod of circular dog (1 b), be equipped with screw thread section (1 c) and second annular (1 e) in proper order in first annular (1 d) one side, the equipartition has a set of first through-hole (1 f) on the cell wall of second annular (1 e).