CN112460137A

CN112460137A - Medium liquid self-cooling static pressure environment-friendly sliding bearing

Info

Publication number: CN112460137A
Application number: CN202011196200.0A
Authority: CN
Inventors: 古捷彬; 陈棠佳; 关渡军; 陈江明
Original assignee: Techemer Composites Guangzhou Co ltd
Current assignee: Techemer Composites Guangzhou Co ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-03-09

Abstract

The invention discloses a medium liquid self-cooling static pressure environment-friendly sliding bearing which comprises a bearing sleeve, a bearing bush liner, a radial seal, sealing cushion pads and an annular pressing plate, wherein the radial seal is arranged in annular grooves at two ends of the bearing bush liner; more than two lubricating liquid injection holes are formed in the bearing bush and the bearing bush, and a gap between the bearing bush and the rotating shaft sleeve is communicated with the lubricating liquid injection holes; the contact surface of the bearing bush lining and the bearing bush is provided with a cooling liquid flow channel. The eccentric wear correcting function of the shaft is realized, and the displacement and vibration of the shaft are reduced; because the lubrication and cooling functions are separated, the structure of the bearing system is greatly simplified in an independent operation mode, and the reliability and the stability of the sliding bearing are improved; the bearing lubricating liquid uses clean water or environment-friendly lubricating oil EAL, and the bearing is environment-friendly and pollution-free in operation.

Description

Medium liquid self-cooling static pressure environment-friendly sliding bearing

Technical Field

The invention relates to a bearing, in particular to a sliding bearing.

Background

The prior sliding bearing has the following defects: 1. the traditional water lubrication bearing consumes a large amount of clean water, and the pump and water supply system has a complex structure, low stability and reliability, and high construction cost and operation cost; in addition, the main stream design utilizes pumping medium liquid to directly cool and lubricate, the medium has more impurities, and the abrasion effect on a shaft and a bearing is stronger; 2. when the running speed of the traditional water lubrication bearing is changed in the starting and stopping processes, the bearing is often in a boundary lubrication and dry friction state, a grinding bushing is burnt out under the dry friction condition, the bearing body and a grinding shaft are greatly abraded, and the service life of the bearing is shortened; 3. the traditional water lubrication bearing has no structure for blocking impurities in an external lubrication medium water, and has strong abrasion to a shaft and the bearing; 4. the oil-lubricated bearings have the disadvantages that sufficient oil reserves cannot be maintained, the starting frictional resistance is large, and once the lubricating oil is insufficient, serious abrasion and failure can occur; the leakage of mineral oil as lubricating medium will pollute the environment. For example, the national intellectual property office discloses a patent document with publication number CN111365364A at 03/07/2020, and discloses a tilting pad dynamic pressure bearing, which comprises a bearing outer ring, a plurality of pads and a plurality of sets of mounting assemblies, wherein the surfaces of the pads, which are in contact with the spindle shaft diameter, are sliding surfaces, and oil collecting grooves are arranged on the sliding surfaces of the pads, and can collect partial pressure lubricating fluid on the sliding surfaces and then feed back the lubricating fluid into oil cavities arranged on the back surfaces of the pads through oil holes to form supporting force for the pads; the middle part of the tile is provided with a deformation structure which divides the tile into two blocks; the mounting assembly applies radial elastic pressing force to the tile; when the bearing works, under the action of the bearing force of the oil cavity on the back of the pad block, the corresponding local block of the pad block overcomes the radial elastic pressing force and the main shaft load force, and the deformation structure is used as a fulcrum to tilt, so that the bearing bush can tilt to form a convergence chamber. The above-mentioned patent documents are liable to wear and sometimes cause shaft vibration, and further, when mineral oil leaks as a lubricating medium, environmental pollution is caused.

Disclosure of Invention

In order to overcome the defects, the invention aims to provide the medium liquid self-cooling static pressure environment-friendly sliding bearing which realizes the eccentric wear correction function of a shaft and reduces the shaft displacement and vibration.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a medium liquid self-cooling static pressure environment-friendly sliding bearing comprises a bearing sleeve, a bearing bush liner, a radial seal, sealing cushion pads and an annular pressing plate, wherein the bearing bush liner is tightly attached to the inner surface of the bearing sleeve; more than two lubricating liquid injection holes are formed in the bearing bush and the bearing bush, a gap between the bearing bush and the rotating shaft sleeve is communicated with the lubricating liquid injection holes, the lubricating liquid injection holes are connected with a lubricating liquid supply system, the lubricating liquid supply system is used for supplying lubricating liquid with pressure, the lubricating liquid with pressure enters the gap between the bearing bush and the rotating shaft sleeve through the more than two lubricating liquid injection holes, and the rotating shaft sleeve is surrounded by the lubricating liquid and is adjusted to be positioned on the axis of the bearing bush; and a cooling liquid flow channel is formed in the contact surface of the bearing bush lining and the bearing sleeve.

Furthermore, the lubricating liquid supply system comprises more than two pipe joints, more than two branch pipelines, a main pipeline, a flow regulating valve, a filter, a valve and a high-level lubricating liquid container, wherein one ends of the more than two branch pipelines are respectively connected with more than two lubricating liquid injection holes through the more than two pipe joints, the other ends of the more than two branch pipelines are communicated with one end of the main pipeline, the other end of the main pipeline is communicated with the high-level lubricating liquid container, and the flow regulating valve, the filter and the valve are arranged on the main pipeline. The lubrication hydraulic pressure is determined by the load capacity, and the hydraulic pressure is regulated by a flow regulating valve to ensure liquid supply.

Further, the lubricating liquid supply system is also provided with a pump, the pump is arranged on the main pipeline, and when the hydraulic pressure cannot meet the requirement, the lubricating liquid can be pressurized through the pump.

Furthermore, the bearing bush bushing adopts an integrated bearing bush sleeve structure or a structure of a bearing bush sleeve formed by splicing a plurality of bearing bushes; the bearing bush lining is of a single-layer material structure or a double-layer structure made of different materials.

Furthermore, more than two liquid grooves are uniformly distributed in the middle of the inner surface of the bearing bush lining along the circumferential direction, and the more than two liquid grooves are respectively communicated with more than two lubricating liquid injection holes; the liquid groove is crescent, arc, trapezoid or rectangular. The design of the sump concentrates the pressure of the injected lubricating fluid on the shaft, and the eccentricity of the shaft causes a pressure increase on one side of the bearing, thus creating an opposing force to correct the position of the shaft.

Furthermore, annular lubricating liquid storage grooves are formed in the inner surface of the bearing bush lining and close to the annular grooves in the two ends of the bearing bush lining, and a throttling ring is formed between the annular lubricating liquid storage grooves and the annular grooves. The throttling ring can reduce the pressure of the seal bearing liquid, and when the seal is worn, the leakage of the lubricating liquid can be effectively reduced.

Furthermore, a lubricating liquid storage groove is formed in the inner surface of the bearing bush lining and located between the liquid groove and the annular lubricating liquid storage groove, and the lubricating liquid storage groove is a spiral groove, a ring groove or a linear groove. The design enables the bearing to generate elastic fluid dynamic pressure lubrication more easily, a lubricating liquid lubricating film is formed between the grinding shaft and the bearing to support, friction and abrasion are reduced, and the service life is obviously prolonged.

Further, the bearing sleeve is provided with a flange, the flange is arranged at one end of the bearing sleeve and is integrally formed with the bearing sleeve, or the flange is provided with a fixed sleeve, the fixed sleeve is sleeved on a boss on the surface of the bearing sleeve, the inner surface of the fixed sleeve is a spherical groove, and the surface of the boss is a spherical surface matched with the spherical groove.

Further, the radial seal adopts TC framework oil seal, and the sealing cushion adopts a flat plate type sealing cushion or a lip type sealing cushion. The adaptive sealing element can be matched according to factors such as actual working conditions, media, pressure and the like.

Furthermore, a plurality of cooling liquid flow channels are arranged and are communicated through an annular flow guide groove; a cooling liquid inlet and a cooling liquid outlet which are communicated with the cooling liquid flowing channel are arranged on the end surface of the bearing sleeve or the bush liner or on the circumferential surface of the bearing sleeve; the cooling liquid flow channel is arranged on the outer surface of the bush liner or the inner surface of the bearing sleeve, or is correspondingly arranged on the outer surface of the bush liner and the inner surface of the bearing sleeve at the same time.

The invention has the beneficial effects that:

more than two lubricating liquid injection holes are formed in the bearing sleeve and the bearing bush liner, and a lubricating liquid supply system is utilized to realize the eccentric wear correction function of the shaft, so that the displacement and vibration of the shaft are reduced; because the two seals are adopted, external impurities can be effectively blocked, the leakage of internal medium liquid can be reduced, the working condition is greatly improved, the maintenance cost is reduced, and the reliability and the stability of the sliding bearing are improved;

in order to avoid corrosion or abrasion of medium liquid to the shaft, a lubricating and cooling two-way independent operation mode is adopted, in the lubricating aspect, constant-pressure clean water or lubricating liquid is supplied from the outside, a hydraulic non-circulating lubricating mode is adopted, under the liquid lubricating condition, the grinding surface is separated by the liquid and is not in direct contact, the surface abrasion can be greatly reduced, and the protective effect on a shaft sleeve and a bearing can be realized; in the aspect of cooling, the medium liquid which flows through is used for cooling, and the heat generated in the working process can be taken away in time. This patent has low friction, low wearing and tearing, simple structure, and the reliability is high and high cooling efficiency's advantage.

The bearing bush has the advantages that the lubricating liquid storage groove and the annular lubricating liquid storage groove are additionally arranged on the inner surface of the bearing bush lining, the design is an original design, the bearing can generate elastic fluid dynamic pressure lubrication more easily, a lubricating liquid lubricating film is formed between the grinding shaft and the bearing to support, friction and abrasion are reduced, and the service life is obviously prolonged.

Drawings

The invention is further described with the aid of the accompanying drawings, in which the embodiments do not constitute any limitation, and for a person skilled in the art, without inventive effort, further drawings may be obtained from the following figures:

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

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic view of a lubricating fluid supply system of the present patent;

FIG. 4 is a schematic structural view of example 2 of the present invention;

FIG. 5 is a schematic structural view of example 3 of the present invention;

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 2;

FIG. 7 is a cross-sectional view taken along line C-C of FIG. 4;

FIG. 8 is a schematic view of the construction of the flat plate sealing cushion of this patent;

FIG. 9 is a cross-sectional view taken along line E-E of FIG. 8;

FIG. 10 is a schematic view of the lip seal cushion of the present patent;

fig. 11 is a cross-sectional view taken along line D-D of fig. 10.

In the figure: 1. a bearing housing; 2. a bearing bush lining; 3. radial sealing; 4. sealing the cushion pad; 5. an annular pressure plate; 6. an annular groove; 7. a screw; 8. a lubricating liquid injection hole; 9. a shaft sleeve of the rotating shaft; 10. a gap; 11. A coolant flow channel; 11a, a first coolant flow channel; 11b, a second coolant flow channel; 11c, a third coolant flow channel; 12. a liquid bath; 13. an annular lubricating fluid storage tank; 14. a restrictor ring; 15. a lubricating fluid reservoir; 16. a rotating shaft; 17. a pipe joint; 18. a branch line; 19. a main pipeline; 20. A flow regulating valve; 21. a filter; 22. a valve; 23. a high level lubricant container; 24. a pump; 25. a flange; 26. fixing a sleeve; 27. a boss; 28. a coolant inlet; 29. an annular diversion trench; 30. and a cooling liquid outlet.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and specific embodiments, and it is to be noted that the embodiments and features of the embodiments of the present application can be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper surface", "lower surface", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "forward", "reverse", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Example 1

As shown in fig. 1 and 2, the medium liquid self-cooling static pressure environment-friendly sliding bearing comprises a bearing sleeve 1, a bush liner 2, a radial seal 3, a seal cushion 4 and an annular pressure plate 5, wherein the bush liner 2 is tightly attached to the inner surface of the bearing sleeve 1, the inner surfaces of two ends of the bush liner 2 are provided with annular grooves 6, the radial seal 3 is arranged in the annular grooves 6, the radial seal adopts a TC framework oil seal, and the seal cushion adopts a flat plate type seal cushion or a lip type seal cushion. The adaptive sealing element can be matched according to factors such as actual working conditions, media, pressure and the like. Two sealed blotters 4 are established at the both ends of bearing housing 1 and are fixed with annular clamp plate 5, and annular clamp plate 5 passes through screw 7 and is connected with the terminal surface of bearing housing 1, and above-mentioned structure has formed twice and has sealed, can effectively obstruct external impurity and reduce the leakage of inside medium liquid, has improved operating condition greatly, has reduced the maintenance cost, has improved slide bearing's reliability and stability. More than two lubricating liquid injection holes 8 are formed in the bearing bush 1 and the bush 2, a gap 10 between the bush 2 and the rotating shaft sleeve 9 is communicated with the lubricating liquid injection holes 8, the lubricating liquid injection holes 8 are connected with a lubricating liquid supply system, the lubricating liquid supply system is used for supplying lubricating liquid with pressure, the lubricating liquid with pressure enters the gap 10 between the bush 2 and the rotating shaft sleeve 9 through the more than two lubricating liquid injection holes 8, the rotating shaft 16 is installed in the rotating shaft sleeve 9, and the rotating shaft sleeve 9 is surrounded by the lubricating liquid and is adjusted to be positioned on the axis of the bearing bush; and a cooling liquid flow channel 11 is formed at the contact surface of the bearing bush liner 2 and the bearing bush 1. The bearing bush bushing adopts an integrated bearing bush sleeve structure or a structure of a bearing bush sleeve formed by splicing a plurality of bearing bushes; the bearing bush lining is of a single-layer material structure or a double-layer structure made of different materials. More than two liquid tanks 12 are uniformly distributed in the middle of the inner surface of the bearing bush liner 2 along the circumferential direction, and the more than two liquid tanks 12 are respectively communicated with more than two lubricating liquid injection holes 8; the design of the sump 12 concentrates the pressure of the injected lubricating fluid on the shaft, and the eccentricity of the shaft causes a pressure increase on one side of the bearing, thus creating an opposing force to correct the position of the shaft.

In order to avoid corrosion or abrasion of medium liquid to the shaft, a lubricating and cooling two-way independent operation mode is adopted, in the lubricating aspect, constant-pressure clean water or lubricating liquid is supplied from the outside, a hydraulic non-circulating lubricating mode is adopted, under the liquid lubricating condition, the grinding surface is separated by the liquid and is not in direct contact, the surface abrasion can be greatly reduced, and the protective effect on a shaft sleeve and a bearing can be realized; in the aspect of cooling, the medium liquid which flows through is used for cooling, and the heat generated in the working process can be taken away in time. This patent has low friction, low wearing and tearing, high cooling efficiency's advantage.

An annular lubricating liquid storage tank 13 is arranged on the inner surface of the bush liner 2 and close to the annular grooves 6 at the two ends of the bush liner 2, and a throttling ring 14 is formed between the annular lubricating liquid storage tank 13 and the annular grooves 6. The restrictor ring 14 reduces the pressure of the seal against the fluid and effectively reduces leakage of lubricating fluid as the seal wears.

The internal surface of bush liner 2 just is located the position between cistern 12 and the annular lubricating liquid hold up tank 13 and is equipped with lubricating liquid hold up tank 15, lubricating liquid hold up tank 15 can design for helicla flute, annular or straight line groove, and what this embodiment adopted is the annular. The design enables the bearing to generate elastic fluid dynamic pressure lubrication more easily, a lubricating liquid lubricating film is formed between the grinding shaft and the bearing to support, friction and abrasion are reduced, and the service life is obviously prolonged.

As shown in fig. 3, the lubricating liquid supply system includes two or more pipe joints 17, two or more branch pipes 18, a main pipe 19, a flow rate adjusting valve 20, a filter 21, a valve 22, and a high-level lubricating liquid container 23, wherein one end of each of the two or more branch pipes 18 is connected to two or more lubricating liquid filling holes 8 of the bearing sleeve 1 through the two or more pipe joints 17, the other end is communicated with one end of the main pipe 19, the other end of the main pipe 19 is communicated with the high-level lubricating liquid container 23, and the flow rate adjusting valve 20, the filter 21, and the valve 22 are provided on the main pipe 19. The lubrication hydraulic pressure is determined by the load capacity and is regulated by the flow regulating valve 20 to ensure liquid supply. The lubricating liquid supply system is also equipped with a pump 24, said pump 24 being mounted on the main conduit 19, and the lubricating liquid can be pressurized by means of the pump 24 when the hydraulic pressure cannot meet the demand. Because more than two lubricating liquid injection holes are formed in the bearing sleeve and the bearing bush liner, the eccentric wear correction function of the shaft is realized by using the lubricating liquid supply system, and the displacement and the vibration of the shaft are reduced.

The liquid bath 12 is designed in a rectangular configuration, as shown in fig. 6.

In this embodiment, the sealing cushion may be a flat sealing cushion, and the structure form is shown in fig. 8 and 9.

Example 2

As shown in fig. 4, a flange 25 is provided on the bearing housing 1, and the flange 25 has two connection and installation manners, the first connection and installation manner is as follows: the flange 25 is arranged at one end of the bearing sleeve 1 and is integrally formed with the bearing sleeve 1. A coolant inlet and a coolant outlet communicating with the coolant flow passage 11 are provided on the end face of the bearing sleeve 1 or the bush liner 2.

As shown in fig. 7, the coolant flow passage 11 is provided with a plurality of coolant flow passages 11, the coolant flow passage 11 has three slotted arrangements, and a first coolant flow passage 11a is provided on the outer surface of the bush liner 2; the second cooling liquid flow channel 11b is arranged on the outer surface of the bearing bush liner 2 and the inner surface of the bearing sleeve 1 at the same time; the third coolant flow passage 11c is provided in the inner surface of the bearing housing 1.

In addition, in the present embodiment, the liquid tank 12 is designed to be crescent-shaped. The sealing cushion can be a flat plate type sealing cushion, and the structural form is shown in fig. 8 and 9.

Example 3

As shown in fig. 5, a second attachment mounting of the flange 25 is such that: the flange 25 is provided with a fixed sleeve 26, the fixed sleeve 26 is sleeved on a boss 27 on the surface of the bearing sleeve, the inner surface of the fixed sleeve is a spherical groove, and the surface of the boss 27 adopts a spherical surface matched with the spherical groove. The plurality of cooling liquid flow channels 11 are communicated through an annular diversion trench 29; a coolant inlet 28 and a coolant outlet 30 communicating with the coolant flow passage 11 are provided on the circumferential surface of the bearing sleeve 1.

In the above three embodiments, the sealing cushion can also be a lip-type sealing cushion, and the structure form is shown in fig. 10 and 11. The lubricating liquid that this patent adopted is clean water or environmental protection lubricating oil EAL, wherein, environmental protection lubricating oil (EAL for short): refers to a lubricating oil that satisfies the three characteristics of "biodegradable" and "minimally toxic" as well as "non-bioaccumulation". The cooling liquid adopts medium water.

Claims

1. The utility model provides a medium liquid self-cooling static pressure environment-friendly slide bearing which characterized in that: the radial sealing device comprises a bearing bush, a bearing bush liner, radial seals, sealing cushions and annular pressing plates, wherein the bearing bush liner is tightly attached to the inner surface of the bearing bush; more than two lubricating liquid injection holes are formed in the bearing bush and the bearing bush, a gap between the bearing bush and the rotating shaft sleeve is communicated with the lubricating liquid injection holes, the lubricating liquid injection holes are connected with a lubricating liquid supply system, the lubricating liquid supply system is used for supplying lubricating liquid with pressure, the lubricating liquid with pressure enters the gap between the bearing bush and the rotating shaft sleeve through the more than two lubricating liquid injection holes, and the rotating shaft sleeve is surrounded by the lubricating liquid and is adjusted to be positioned on the axis of the bearing bush; and a cooling liquid flow channel is formed in the contact surface of the bearing bush lining and the bearing sleeve.

2. The medium liquid self-cooling static pressure environment-friendly sliding bearing according to claim 1, characterized in that: the lubricating liquid supply system comprises more than two pipe joints, more than two branch pipelines, a main pipeline, a flow regulating valve, a filter, a valve and a high-level lubricating liquid container, wherein one ends of the more than two branch pipelines are respectively connected with more than two lubricating liquid injection holes through the more than two pipe joints, the other ends of the more than two branch pipelines are communicated with one end of the main pipeline, the other end of the main pipeline is communicated with the high-level lubricating liquid container, and the flow regulating valve, the filter and the valve are arranged on the main pipeline.

3. The self-cooling static pressure environment-friendly sliding bearing according to claim 2, wherein: the lubricating fluid supply system is also provided with a pump, and the pump is arranged on the main pipeline.

4. The self-cooling static pressure environment-friendly sliding bearing according to claim 3, wherein: the bearing bush liner adopts an integrated bearing bush sleeve structure or a structure of a bearing bush sleeve formed by splicing a plurality of bearing bushes; the bearing bush lining is of a single-layer material structure or a double-layer structure made of different materials.

5. The medium liquid self-cooling static pressure environment-friendly sliding bearing according to any one of claims 1 to 4, characterized in that: more than two liquid tanks are uniformly distributed in the middle of the inner surface of the bearing bush lining along the circumferential direction, and the more than two liquid tanks are respectively communicated with more than two lubricating liquid injection holes; the liquid groove is crescent, arc, trapezoid or rectangular.

6. The self-cooling static pressure environment-friendly sliding bearing according to claim 5, wherein: and annular lubricating liquid storage grooves are formed in the inner surface of the bearing bush lining and close to the annular grooves at the two ends of the bearing bush lining, and a throttling ring is formed between the annular lubricating liquid storage grooves and the annular grooves.

7. The medium liquid self-cooling static pressure environment-friendly sliding bearing according to claim 6, characterized in that: and a lubricating liquid storage tank is arranged on the inner surface of the bearing bush lining and positioned between the liquid tank and the annular lubricating liquid storage tank, and the lubricating liquid storage tank is a spiral groove, an annular groove or a linear groove.

8. The self-cooling static pressure environment-friendly sliding bearing according to claim 7, wherein: the bearing sleeve is provided with a flange, the flange is arranged at one end of the bearing sleeve and is integrally formed with the bearing sleeve, or the flange is provided with a fixed sleeve, the fixed sleeve is sleeved on a boss on the surface of the bearing sleeve, the inner surface of the fixed sleeve is a spherical groove, and the boss on the surface of the bearing sleeve is a spherical surface matched with the spherical groove.

9. The medium liquid self-cooling static pressure environment-friendly sliding bearing according to claim 1, characterized in that: the radial seal adopts TC framework oil seal, and the sealing cushion adopts a flat plate type sealing cushion or a lip type sealing cushion.

10. The medium liquid self-cooling static pressure environment-friendly sliding bearing according to claim 1, characterized in that: the cooling liquid flow channels are provided with a plurality of cooling liquid flow channels which are communicated through annular flow guide grooves; a cooling liquid inlet and a cooling liquid outlet which are communicated with the cooling liquid flowing channel are arranged on the end surface of the bearing sleeve or the bush liner or on the circumferential surface of the bearing sleeve; the cooling liquid flow channel is arranged on the outer surface of the bush liner or the inner surface of the bearing sleeve, or is correspondingly arranged on the outer surface of the bush liner and the inner surface of the bearing sleeve at the same time.