CN212775580U

CN212775580U - Integrated sealing structure

Info

Publication number: CN212775580U
Application number: CN202021411117.6U
Authority: CN
Inventors: 周坤; 马升; 王业荣; 周武彬
Original assignee: Ningbo Baosi Energy Equipment Co Ltd
Current assignee: Ningbo Baosi Energy Equipment Co Ltd
Priority date: 2020-07-17
Filing date: 2020-07-17
Publication date: 2021-03-23
Anticipated expiration: 2030-07-17

Abstract

The utility model relates to an integrated sealing structure, which comprises an air sealing component and an oil sealing component which are sequentially sleeved outside a rotating shaft along the axial direction, wherein the oil sealing component is arranged at one end close to a bearing; the air sealing assembly comprises a piston seat, the piston seat is sleeved on the rotating shaft, the oil sealing assembly comprises a movable ring and a static ring, the movable ring and the static ring are both sleeved on the rotating shaft, the static ring abuts against the shell and is close to the piston seat end, and the movable ring is close to the bearing end; the utility model has the advantages that: through setting up airtight subassembly and oil seal subassembly, can strengthen the sealing performance between compression chamber and the gear box and simplify assembly process, reduced manufacturing cost and improved production efficiency by a wide margin.

Description

Integrated sealing structure

Technical Field

The utility model belongs to the technical field of mechanical seal device, especially, relate to an integrative integrated form seal structure suitable for on oil-free screw compressor.

Background

In the working process of a general oil-free screw compressor, a compression cavity is in an oil-free state, so that the compressor can be applied to different high-end fields such as textiles, food, medical appliances and the like. Generally, an oil-free screw compressor needs lubricating oil to lubricate a bearing and a gear and cool the bearing and the gear, so that the sealing of a compression cavity and a gear box in an oil-free screw compressor main machine is particularly important, the lubricating oil supplied to the bearing and the gear is leaked to the compression cavity due to poor sealing performance, a trace amount of lubricating oil exists in gas compressed by the oil-free screw, and the phenomenon can affect a terminal client.

Disclosure of Invention

An object of the utility model is to overcome the not enough of prior art existence, and provide an integrative integrated form seal structure that prevents lubricating oil from leaking the compression chamber.

The utility model aims to solve the problems that the integrated sealing structure comprises an air sealing component and an oil sealing component which are sequentially sleeved outside a rotating shaft along the axial direction, and the oil sealing component is arranged at one end close to a bearing; the air sealing assembly comprises a piston seat, the piston seat is sleeved on the rotating shaft, the oil sealing assembly comprises a movable ring and a static ring, the movable ring and the static ring are all sleeved on the rotating shaft, the static ring abuts against the shell and is close to the piston seat end, and the movable ring is close to the bearing end.

Preferably, one end of the piston seat abuts against the end face of the rotating shaft, and the other end of the piston seat abuts against the end face of the bearing.

Preferably, an O-shaped sealing ring is arranged between the inner ring of the piston seat and the rotating shaft, and the O-shaped sealing ring is embedded in a groove formed in the inner wall of the piston seat.

Preferably, the outer ring of the piston seat is provided with at least two axially arranged annular grooves, and a piston ring is mounted in each annular groove, and the outer end face of the piston ring is tightly contacted with the shell wall to form a labyrinth type air sealing structure.

Preferably, the movable ring and the stationary ring are sleeved on the piston seat, an L-shaped groove is formed in the side wall of the movable ring close to the side of the stationary ring, an L-shaped protrusion is formed in the side wall of the stationary ring corresponding to the L-shaped groove, and the L-shaped groove and the L-shaped protrusion are abutted to each other to form a labyrinth oil seal structure.

Preferably, a wear-resistant ring is arranged between the inner ring of the stationary ring and the piston seat, and the wear-resistant ring is embedded in a groove formed in the inner wall of the stationary ring.

Preferably, an O-ring is disposed between the outer ring of the stationary ring and the housing wall, and the O-ring is embedded in a groove disposed on the outer wall of the stationary ring.

Preferably, an O-shaped sealing ring is arranged between the inner wall of the movable ring and the piston seat, and the O-shaped sealing ring is embedded in a groove formed in the inner wall of the movable ring.

The utility model has the advantages that: through setting up airtight subassembly and oil seal subassembly, can strengthen the sealing performance between compression chamber and the gear box and simplify assembly process, reduced manufacturing cost and improved production efficiency by a wide margin.

Drawings

Fig. 1 is a schematic view of the integrated sealing structure of the present invention.

Fig. 2 is a schematic structural diagram of the integrated sealing structure of the present invention applied to the compressor.

The reference numbers in the drawings are respectively: 1. a rotating shaft; 2. a hermetic seal assembly; 3. an oil seal assembly; 4. a bearing; 5. a housing; 6. an O-shaped sealing ring; 7. a through hole; 21. a piston seat; 22. a piston ring; 31. a moving ring; 32. a stationary ring; 33. a wear ring; 21-1, an annular groove; 31-1, an L-shaped groove; 32-1, L-shaped protrusion.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings: as shown in the attached

drawings

1 and 2, the utility model is suitable for a rotary oil-free screw compressor, which comprises an air seal component 2 and an oil seal component 3 which are sequentially sleeved outside a rotating shaft 1 along the axial direction, wherein the rotating shaft 1 is an axis body of a rotor in a compression cavity, which is positioned at the gear box side of the compressor, and the oil seal component 3 is arranged at one end close to a bearing 4 which is positioned in the gear box of the compressor; the air sealing assembly 2 comprises a piston seat 21, the piston seat 21 is sleeved on the rotating shaft 1, and when the host machine operates, the rotating shaft 1 and the piston seat 21 rotate together; the oil seal assembly 3 comprises a movable ring 31 and a stationary ring 32, the movable ring 31 and the stationary ring 32 are both sleeved on the rotating shaft 1, the stationary ring 32 abuts against the shell 5 and is close to the end of the piston seat 21, and the movable ring 31 is close to the end of the bearing 4; when the main engine operates, the movable ring 31 rotates along with the rotating shaft 1 and generates a centrifugal force, the stationary ring 32 is stationary, most of lubricating oil is thrown to an oil storage hole on the compressor under the action of the centrifugal force, a small part of oil gas is discharged through the through hole 7 arranged on the compressor shell, and the through hole 7 is positioned between the piston seat 21 and the stationary ring 32. Through setting up airtight subassembly and oil seal subassembly, can strengthen the sealing performance between compression chamber and the gear box and simplify assembly process, reduced manufacturing cost and improved production efficiency by a wide margin.

One end of the piston seat 21 abuts against the end surface of the rotating shaft 1, and the other end abuts against the end surface of the bearing 4, so that the piston seat 21 is prevented from axially shifting while following the rotation of the rotating shaft 1.

An O-shaped sealing ring 6 is arranged between the inner ring of the piston seat 21 and the rotating shaft 1, and the O-shaped sealing ring 6 is embedded in a groove arranged on the inner wall of the piston seat 21, so that the piston seat 21 is in contact with the rotating shaft 1 and plays a role in sealing.

The outer ring of the piston seat 21 is provided with at least two axially arranged annular grooves 21-1, the number of the annular grooves is generally 2 to 10, a piston ring 22 is arranged in each annular groove 21-1, and the outer end surface of each piston ring 22 is tightly contacted with the shell wall to form a labyrinth type air sealing structure; the piston ring 22 is made of elastic steel material, and is fixed in the shell under the action of tangential elasticity and radial elasticity after being compressed and installed in the shell, when the main machine operates, the rotating shaft 1 and the piston seat 21 rotate together, the piston ring 22 is still and does not contact with the piston seat 21, and the labyrinth sealing principle is utilized to play a role in sealing gas.

The movable ring 31 and the static ring 32 are sleeved on the piston seat 21, the side wall of the movable ring 31 close to the static ring 32 is provided with an L-shaped groove 31-1, the side wall of the static ring 32 corresponding to the L-shaped groove 31-1 is provided with an L-shaped protrusion 32-1, the L-shaped groove 31-1 and the L-shaped protrusion 32-1 are abutted to form a labyrinth oil sealing structure, and the two rings can rotate relatively and are not separated after being assembled, so that a small part of oil can be sealed under the action of the labyrinth oil sealing structure.

A wear-resistant ring 33 is arranged between the inner ring of the static ring 32 and the piston seat 21, the wear-resistant ring 33 is embedded in a groove formed in the inner wall of the static ring 32, and the wear-resistant ring 33 plays a role in guiding and protecting, so that direct contact between the static ring 32 and the piston seat 21 is prevented, and the loss of parts is prevented from affecting the performance of a host machine.

An O-ring seal 6 is provided between the outer ring of the stationary ring 32 and the housing wall, and the O-ring seal 6 is embedded in a groove provided on the outer wall of the stationary ring 32, so that the stationary ring 32 is in contact with the housing wall and plays a role of sealing.

An O-ring 6 is disposed between the inner wall of the movable ring 31 and the piston seat 21, and the O-ring 6 is embedded in a groove disposed on the inner wall of the movable ring 31, so that the movable ring 31 contacts with the piston seat 21 and plays a role in sealing.

The present invention is not limited to the above embodiments, and any change is made on the shape or material composition, and all the structural designs provided by the present invention are all the deformation of the present invention, which should be considered within the protection scope of the present invention.

Claims

1. An integrative integrated form seal structure which characterized in that: the oil seal device comprises an air seal component (2) and an oil seal component (3) which are sequentially sleeved outside a rotating shaft (1) along the axial direction, wherein the oil seal component (3) is arranged at one end close to a bearing (4); the air-tight seal subassembly (2) includes piston seat (21), piston seat (21) cover is established on pivot (1), oil seal subassembly (3) are including rotating ring (31), quiet ring (32), rotating ring (31) with quiet ring (32) are all established on pivot (1), just quiet ring (32) and casing (5) counterbalance are leaned on, and are close to piston seat (21) end, rotating ring (31) are close to bearing (4) end.

2. The integrated seal structure of claim 1, wherein: one end of the piston seat (21) is abutted against the end face of the rotating shaft (1), and the other end of the piston seat is abutted against the end face of the bearing (4).

3. The integrated seal structure of claim 1, wherein: an O-shaped sealing ring (6) is arranged between the inner ring of the piston seat (21) and the rotating shaft (1), and the O-shaped sealing ring (6) is embedded in a groove formed in the inner wall of the piston seat (21).

4. The integrated seal structure of claim 1, wherein: the outer ring of the piston seat (21) is provided with at least two axially arranged annular grooves (21-1), a piston ring (22) is installed in each annular groove (21-1), and the outer end face of each piston ring (22) is tightly contacted with the wall of the shell to form a labyrinth type air sealing structure.

5. The integrated seal structure of claim 1, wherein: the rotating ring (31) with quiet ring (32) all overlap and establish on piston seat (21), be close to quiet ring (32) side be equipped with L type groove (31-1) on rotating ring (31) lateral wall, with be equipped with L type arch (32-1) on the quiet ring (32) lateral wall that L type groove (31-1) is corresponding, just L type groove (31-1) with offset and form labyrinth type oil seal structure between L type arch (32-1).

6. The integrated seal structure of claim 5, wherein: and a wear-resistant ring (33) is arranged between the inner ring of the static ring (32) and the piston seat (21), and the wear-resistant ring (33) is embedded in a groove arranged on the inner wall of the static ring (32).

7. The integrated seal structure of claim 5, wherein: an O-shaped sealing ring (6) is arranged between the outer ring of the static ring (32) and the shell wall, and the O-shaped sealing ring (6) is embedded in a groove formed in the outer wall of the static ring (32).

8. The integrated seal structure of claim 5, wherein: an O-shaped sealing ring (6) is arranged between the inner wall of the movable ring (31) and the piston seat (21), and the O-shaped sealing ring (6) is embedded in a groove formed in the inner wall of the movable ring (31).