CN220204132U - Sliding bearing, star wheel mechanism and single screw compressor - Google Patents

Abstract

The utility model relates to the technical field of compressors, and provides a sliding bearing, a star wheel mechanism and a single-screw compressor, wherein the sliding bearing comprises a thrust ring and a bearing bush, and the thrust ring is arranged on a star wheel shaft of the single-screw compressor; the axle bush cover is established outside the star gear axle, is provided with the water supply tank on the inner wall of axle bush, is provided with the water storage tank on the terminal surface that the axle bush contacted with the thrust collar, and the water storage tank is used for storing the moist water, and water supply tank and water storage tank intercommunication. The water storage groove is arranged on the end surface of the bearing bush, which is in contact with the thrust ring, so that the water pressure between the bearing bush and the thrust ring is favorably established, a pressure water film can be formed between the bearing bush and the thrust ring, and the sliding bearing can bear the axial force generated by the gas pressure in the operation process of the single-screw compressor; meanwhile, the water lubrication of the sliding bearing can be realized, an oil lubrication loop is not required to be additionally arranged, and the structural design of the single screw compressor is greatly simplified.

Description

Sliding bearing, star wheel mechanism and single screw compressor

Technical Field

The utility model relates to the technical field of compressors, in particular to a sliding bearing, a star wheel mechanism and a single-screw compressor.

Background

The water lubrication single screw compressor adopts pure water as a lubricating medium instead of lubricating oil, so that the cleanness of compressed gas can be ensured, and meanwhile, the exhaust temperature of the compressor can be effectively reduced because the cooling performance of water is higher than that of the lubricating oil. However, the lubrication form at the star wheel shaft bearing becomes an important problem to be considered in the structural design of the compressor due to the fact that the lubrication oil is changed into lubrication water.

The star wheel shaft bearing of the existing water lubrication single screw compressor mainly adopts two design modes: the first kind adopts the sealing member to keep apart compression chamber and star wheel axle bearing, realizes the water lubrication of compression chamber and the oil lubrication of bearing, but makes the star wheel axle system structural design of compressor complicated like this, and the friction of sealing member consumes more work. The second kind adopts carborundum water lubrication slide bearing, and compression chamber and bearing all adopt water lubrication, need not to set up the sealing member and keep apart compression chamber and star wheel axle bearing, simple structure.

However, the end part of the bearing bush of the sliding bearing is arranged to be of a planar structure, which is not beneficial to the establishment of the bearing capacity of a water film, and the problems of crushing of a thrust ring and the like easily occur when the single screw compressor operates, thereby influencing the operation stability of the compressor.

Disclosure of Invention

The utility model provides a sliding bearing, a star wheel mechanism and a single screw compressor, which are used for solving the defects that the end part of a bearing bush of the sliding bearing in the prior art is arranged to be of a plane structure, which is not beneficial to the establishment of a water film bearing capacity, and the problem that a thrust ring is easy to crush and the like when the single screw compressor operates, thereby influencing the operation stability of the compressor.

The present utility model provides a sliding bearing comprising:

the thrust ring is arranged on a star wheel shaft of the single-screw compressor;

the bearing bush is sleeved outside the star wheel shaft, a water supply groove is formed in the inner wall of the bearing bush, a water storage groove is formed in the end face, in contact with the thrust ring, of the bearing bush, the water storage groove is used for storing lubricating water, and the water supply groove is communicated with the water storage groove.

According to the sliding bearing provided by the utility model, the sliding bearing further comprises a pressure device, wherein the pressure device is used for driving lubricating water to flow from the water supply tank to the water storage tank.

According to the sliding bearing provided by the utility model, the end surface of the bearing bush, which is contacted with the thrust ring, is further provided with the water sealing edge, and the water sealing edge is positioned at the radial outer side of the water storage groove.

According to the sliding bearing provided by the utility model, the end face of the bearing bush, which is contacted with the thrust ring, is provided with a plurality of water storage tanks, and the water storage tanks are uniformly distributed along the circumferential direction of the bearing bush.

According to the sliding bearing provided by the utility model, the inner wall of the bearing bush is provided with the plurality of water supply grooves, and the plurality of water supply grooves are in one-to-one correspondence and are communicated with the plurality of water storage grooves.

According to the sliding bearing provided by the utility model, the water storage groove is a fan-shaped groove.

According to the present utility model, there is provided a sliding bearing further comprising:

and the bearing seat is fixedly connected with the shell of the single-screw compressor, and the bearing bush is arranged in the bearing seat.

According to the sliding bearing provided by the utility model, the pressure device is a water pump, and the water outlet of the water pump is communicated with the water supply tank.

The utility model also provides a star wheel mechanism comprising a sliding bearing as claimed in any one of the preceding claims.

The utility model also provides a single screw compressor comprising a slide bearing as described in any one of the above or a star wheel mechanism as described above.

The utility model provides a sliding bearing, a star wheel mechanism and a single screw compressor, wherein the sliding bearing comprises a thrust ring and a bearing bush, the thrust ring is arranged on a star wheel shaft of the single screw compressor, the bearing bush is sleeved outside the star wheel shaft, a water supply groove is arranged on the inner wall of the bearing bush, a water storage groove is arranged on the end face of the bearing bush, which is in contact with the thrust ring, and the water supply groove is communicated with the water storage groove, so that lubricating water can enter the water storage groove from the water supply groove, and the water storage groove can store lubricating water.

The arrangement is that the water storage groove is arranged on the end surface of the bearing bush, which is in contact with the thrust ring, so that the water pressure between the bearing bush and the thrust ring is favorably established, a pressure water film can be formed between the bearing bush and the thrust ring, and the sliding bearing can bear the axial force generated by the gas pressure in the operation process of the single-screw compressor; meanwhile, the water lubrication of the sliding bearing can be realized, an oil lubrication loop is not required to be additionally arranged, and the structural design of the single screw compressor is greatly simplified.

Drawings

In order to more clearly illustrate the utility model or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a diagram of the connection between a sliding bearing and a star wheel shaft;

FIG. 2 is a cross-sectional view of a bushing and thrust collar provided by the present utility model;

fig. 3 is a plan view of an end face of the bearing shell in contact with the thrust collar provided by the present utility model.

Reference numerals:

1. bearing bush; 2. a thrust collar; 3. a star wheel shaft;

4. a water storage tank; 5. a water pump; 6. a water supply tank;

7. sealing the water edge; 8. a shaft sleeve.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The sliding bearing, the star wheel mechanism and the single screw compressor of the present utility model are described below with reference to fig. 1 to 3.

As shown in fig. 1, a sliding bearing provided by the present utility model may include a thrust collar 2 and a bearing shell 1.

Wherein, thrust ring 2 can set up on single screw compressor's star wheel axle 3, and axle bush 1 can overlap outside star wheel axle 3, can be provided with water supply tank 6 on the inner wall of axle bush 1, can be provided with water storage tank 4 on the terminal surface that axle bush 1 contacted with thrust ring 2 to water supply tank 6 and water storage tank 4 intercommunication to make the lubrication water enter into water storage tank 4 from water supply tank 6, make water storage tank 4 can store the lubrication water.

Under the action of the water pressure of the lubricating water in the water storage tank 4, a pressure water film can be formed between the bearing bush 1 and the thrust ring 2, so that the thrust ring 2 can be suspended on the bearing bush 1 all the time, and the axial force of the star wheel shaft 3 can be born.

The arrangement is that the water storage tank 4 is arranged on the end surface of the bearing bush 1, which is in contact with the thrust ring 2, so that the establishment of water pressure between the bearing bush 1 and the thrust ring 2 is facilitated, a pressure water film can be formed between the bearing bush 1 and the thrust ring 2, and the sliding bearing can bear the axial force generated by gas pressure in the operation process of the single-screw compressor; meanwhile, the water lubrication of the sliding bearing can be realized, an oil lubrication loop is not required to be additionally arranged, and the structural design of the single screw compressor is greatly simplified.

In an alternative embodiment of the utility model, the slide bearing may further comprise pressure means, which may be used to drive the flow of lubricating water from the water supply tank 6 in the direction of the water reservoir 4. Therefore, pressure can be provided for lubricating water, the lubricating water can be smoothly sprayed into the water storage tank 4 in the operation process of the single-screw compressor, and the water film pressure between the bearing bush 1 and the thrust collar 2 can be established. The ability of the thrust collar 2 to withstand the axial forces of the star wheel shaft 3 can be effectively improved.

In an alternative embodiment, the pressure device may be a water pump 5, and the water outlet of the water pump 5 may be in communication with a water supply tank 6. In this way, it is convenient to provide lubrication water for the sliding bearing.

Here, the water inlet of the water pump 5 may be in communication with a water storage device, which may be a water tank.

In an alternative embodiment of the utility model, the end surface of the bearing bush 1, which is in contact with the thrust collar 2, may also be provided with a water sealing edge 7, and the water sealing edge 7 may be located radially outside the sump 4. Like this, seal water limit 7 can play certain effect that seals and keep off lubricated water, can avoid the whole follow water storage tank 4 of lubrication water in the water storage tank 4 to flow out or flow out from water storage tank 4 fast, can guarantee to have the lubricated water all the time in the water storage tank 4 to be favorable to the formation of the pressure water film between axle bush 1 and the thrust collar 2.

In an alternative embodiment of the present utility model, a plurality of water storage grooves 4 may be provided on the end surface of the bearing shell 1 contacting the thrust collar 2, and the plurality of water storage grooves 4 may be uniformly distributed in the circumferential direction of the bearing shell 1. Therefore, the lubricating water quantity between the bearing bush 1 and the thrust ring 2 can be effectively increased, the lubricating degree is effectively improved, the formation of a pressure water film can be facilitated, and the capability of the thrust ring 2 for bearing axial force is improved.

In an alternative embodiment, a plurality of water supply grooves 6 may be provided on the inner wall of the bearing shell 1, and the plurality of water supply grooves 6 may be in one-to-one correspondence and communicate with the plurality of water storage grooves 4. Like this, supply water for a plurality of water tanks 4 respectively through a plurality of water supply tanks 6, can guarantee that all there is the moist water in every water tank 4 to guarantee the formation of pressure water film, and effectively improve slide bearing's ability of bearing axial force, thereby can effectively improve slide bearing's life.

In this embodiment, six water supply grooves 6 may be disposed on the inner wall of the bearing bush 1, and six water storage grooves 4 may be disposed on the end surface of the bearing bush 1 in contact with the thrust collar 2, where the six water supply grooves 6 are respectively in one-to-one correspondence and are communicated with the six water storage grooves 4.

Here, the number of the water supply tank 6 and the water storage tank 4 is not limited, and may be specifically changed according to the space and the structure of the shafting of the single screw compressor.

In an alternative embodiment, the sump 4 may be a fan-shaped sump, with a plurality of sump 4 distributed around the star wheel shaft 3.

In other embodiments, the sump 4 may have other shapes, for example, the sump 4 may have a triangular or rectangular shape, or other shapes, and may specifically vary depending on the space and shafting configuration of the single screw compressor.

In an alternative embodiment, the slide bearing may further comprise a bearing housing, which may be fixedly connected with the casing of the single screw compressor, and the bearing shell 1 may be arranged in the bearing housing. In this way, a connection of the sliding bearing to the housing of the single-screw compressor can be achieved.

A seal may be provided between the bearing shell 1 and the bearing housing to prevent gas leakage in a single screw compressor.

In an alternative embodiment of the utility model, the star wheel shaft 3 may be provided with the shaft sleeve 8, the bearing bush 1 may be sleeved outside the shaft sleeve 8, a gap exists between the bearing bush 1 and the shaft sleeve 8, the water supply tank 6 may be communicated with the gap, and lubrication water may enter the gap, so that lubrication between the shaft sleeve 8 and the bearing bush 1 may be realized, and the lubrication water may conveniently form a dynamic pressure water film in the gap between the bearing bush 1 and the shaft sleeve 8 in the rotation process of the star wheel shaft 3.

Here, the sleeve 8 may be fixedly connected to the spider shaft 3, and in particular, the sleeve 8 and the spider shaft 3 may be interference-fitted.

In the sliding bearing provided by the utility model, during the operation process of a single screw compressor, lubricating water enters the water storage tank 4 through the water supply tank 6 under the pressure action of the water pump 5, and the lubricating water is stored in the water storage tank 4 due to the blocking action of the water blocking edge 7. Under the action of lubricating water pressure, a pressure water film is formed between the bearing bush 1 and the thrust ring 2, so that the thrust ring 2 is always suspended on the bearing bush 1, and the sliding bearing can bear the axial force of the star wheel shaft 3; meanwhile, in the rotation process of the star wheel shaft 3, the lubricating water can form a dynamic pressure water film in a gap between the bearing bush 1 and the shaft sleeve fixed on the star wheel shaft 3, so that the star wheel shaft 3 is ensured to be suspended on the dynamic pressure water film all the time, and the sliding bearing can bear the radial force of the star wheel shaft 3, thereby realizing the stable operation of the single-screw compressor.

In FIG. 1 and FIG. 2, W is as follows ₁ Expressed as the direction of the axial force, W ₂ Expressed as the direction of the radial force.

The star wheel mechanism provided by the utility model is described below, and the star wheel mechanism described below and the sliding bearing described above can be referred to correspondingly.

The star wheel mechanism provided by the utility model can comprise a star wheel shaft 3 and the sliding bearing in any embodiment.

The advantages achieved by the star wheel mechanism provided by the utility model are consistent with those achieved by the sliding bearing provided by the utility model, and will not be described in detail herein.

In an alternative embodiment of the present utility model, the star wheel mechanism may further include a star wheel plate fixedly disposed on the star wheel shaft 3, and the star teeth of the star wheel plate are engaged with the screw rotor of the single screw compressor.

In an alternative embodiment, the spider mechanism may comprise two slide bearings, which may be provided at two journals of the spider shaft 3, respectively.

And, the bearing frame of two slide bearings all with single screw compressor's casing fixed connection, the thrust collar 2 of two slide bearings all with star wheel axle 3 fixed connection, the axle bush 1 of two slide bearings overlaps respectively and establishes outside the two axle journals of star wheel axle 3.

The single screw compressor provided by the utility model is described below, and the single screw compressor described below and the sliding bearing or the star wheel mechanism described above can be referred to correspondingly.

The utility model provides a single-screw compressor which can comprise a sliding bearing according to any one of the embodiments or a star wheel mechanism according to the embodiment.

The beneficial effects achieved by the single screw compressor provided by the utility model are consistent with those achieved by the sliding bearing or the star wheel mechanism provided by the utility model, and are not repeated here.

The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present utility model without undue burden.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. A sliding bearing, characterized by comprising:

the thrust ring (2) is arranged on a star wheel shaft (3) of the single-screw compressor;

the bearing bush (1) is sleeved outside the star wheel shaft (3), a water supply groove (6) is formed in the inner wall of the bearing bush (1), a water storage groove (4) is formed in the end face, in contact with the thrust ring (2), of the bearing bush (1), the water storage groove (4) is used for storing lubricating water, and the water supply groove (6) is communicated with the water storage groove (4).

2. A sliding bearing according to claim 1, further comprising pressure means for driving the flow of lubricating water from the water supply tank (6) in the direction of the water reservoir (4).

3. The sliding bearing according to claim 1, characterized in that the end face of the bearing bush (1) in contact with the thrust ring (2) is further provided with a water sealing edge (7), the water sealing edge (7) being located radially outside the water storage groove (4).

4. A sliding bearing according to claim 1, characterized in that the end face of the bush (1) in contact with the thrust ring (2) is provided with a plurality of water storage grooves (4), the plurality of water storage grooves (4) being evenly distributed along the circumferential direction of the bush (1).

5. The sliding bearing according to claim 4, wherein a plurality of water supply grooves (6) are provided on the inner wall of the bush (1), and the plurality of water supply grooves (6) are in one-to-one correspondence and communication with the plurality of water storage grooves (4).

6. A sliding bearing according to claim 1, characterized in that the sump (4) is a sector-shaped sump.

7. The sliding bearing according to claim 1, further comprising:

and the bearing seat is fixedly connected with the shell of the single-screw compressor, and the bearing bush (1) is arranged in the bearing seat.

8. A sliding bearing according to claim 2, characterized in that the pressure means is a water pump (5), the water outlet of the water pump (5) being in communication with the water supply tank (6).

9. Star wheel mechanism, characterized by comprising a star wheel shaft (3) and a sliding bearing according to any of claims 1-8.

10. A single screw compressor comprising a slide bearing according to any one of claims 1 to 8 or a star wheel mechanism according to claim 9.