Hydrodynamic sliding bearing

Abstract

The utility model discloses a hydrodynamic sliding bearing, which comprises a shaft sleeve, at least two rows of groove groups are arranged on the inner wall of the shaft sleeve, each groove group comprises a plurality of grooves parallel to each other, each groove is formed by combining a transverse groove and inclined grooves symmetrically arranged on two sides of the transverse groove, the transverse groove is connected at the intersection position of two inclined grooves, and the inclined grooves are connected with the shaft sleeve. The transverse groove is formed along the arc line of the inner diameter of the shaft sleeve, and one of the two inclined grooves extends to the edge of the shaft sleeve. The structure is more reasonable, the pressure distribution of a lubricating oil film can be better adjusted, and the using effect of the structure is improved.

Description

Technical Field

[0001] The utility model relates to a fluid dynamic pressure sliding bearing. Background Art

[0002] Fluid dynamic sliding bearings use the lubricating film formed by the lubricant between the contact interfaces during high-speed rotation to achieve low-friction operation with metal surface separation, and are widely used in cooling fans, compressors, and other fields. At present, in the field of cooling fans, in addition to pursuing low roughness on the contact surface of the sleeve, micro-textures in the form of arcs or folds are also used to adjust the thickness of the lubricating film and lubrication conditions. However, when the existing structure is used, the lubricating oil is prone to uneven pressure distribution, which affects the lubrication effect and the sealing performance of the structure. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a fluid dynamic pressure sliding bearing, which has a more reasonable structure and can better adjust the pressure distribution of the lubricating oil film, thereby improving the use effect of the structure.

[0004] To achieve the above-mentioned purpose, the utility model provides a fluid dynamic pressure sliding bearing, including a sleeve, wherein at least two rows of groove groups are arranged on the inner wall of the sleeve, each groove group includes a plurality of grooves parallel to each other, and the grooves are composed of a transverse groove and oblique grooves symmetrically arranged on both sides of the transverse groove, the transverse groove is connected at the intersection of two oblique grooves, the transverse groove is arranged along the arc line of the inner diameter of the sleeve, and one of the two oblique grooves extends to the edge of the sleeve.

[0005] The beneficial effect of such an arrangement is that by arranging the transverse grooves, the axial lubricating oil film pressure distribution of the bearing can be adjusted more efficiently, while the axial sealing performance can be improved. Preferably, the combination of the two inclined grooves to form an arrow-shaped groove is not limited to circumferentially uniform distribution, and can be adjusted according to different performance improvement requirements. The arrow-shaped structure can increase the solid-liquid contact area and enhance the oil storage function, and provide additional oil to the contact surface under conditions prone to oil starvation such as starting and stopping. This structure is simple, easy to implement, and has a good use effect.

[0006] As a further configuration of the utility model, the edges on both sides of the transverse groove and the inclined groove are smoothly connected to the bottom surface through arc-shaped transition surfaces.

[0007] The beneficial effect of such arrangement is that, through such arrangement, the groove structure has an arc-shaped transition surface transition, which can prevent the generation of cavitation or turbulence of the lubricating oil flow. At the same time, the structure is simple, easy to process, and has a good use effect.

[0008] As a further configuration of the utility model, a transition groove is provided at the end of the sleeve, and the edge of the inclined groove extends to the transition groove.

[0009] The beneficial effect of such arrangement is that the structural layout is made more reasonable, the processing is facilitated, and the stability of the structure in use is improved.

[0010] As a further configuration of the utility model, an angle is formed between the two inclined grooves, and the two inclined grooves are arranged on both sides of the transverse groove.

[0011] The beneficial effect of such arrangement is that the structural combination forms an arrow shape, which is convenient for guiding the stored oil and facilitating the uniform distribution of ink pressure, thus achieving good use effect.

[0012] As a further configuration of the utility model, an angle is formed between the two inclined grooves, and the transverse groove is arranged outside the angle.

[0013] The beneficial effect of such arrangement is that the structural combination forms a Y shape, which is convenient for guiding the storage of oil and facilitating the uniform distribution of ink pressure, thus achieving good use effect.

[0014] As a further configuration of the utility model, an angle is formed between the two inclined grooves, and the transverse groove includes a first groove body and a second groove body connected to each other, the first groove body is arranged in the angle, and the second groove body is arranged outside the angle.

[0015] The beneficial effect of such arrangement is that it is easy to guide the stored oil, and the ink pressure is evenly distributed, which has a good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the first embodiment of the utility model;

[0017] Figure 2 This is a schematic cross-sectional structure diagram of the first embodiment of the utility model;

[0018] Figure 3 This is a schematic cross-sectional structure diagram of a second embodiment of the utility model;

[0019] Figure 4 This is a schematic cross-sectional structure diagram of the third embodiment of the utility model;

[0020] Figure 5 It is a schematic diagram of the cross-sectional structure of the transverse groove and the inclined groove in three embodiments of the utility model. DETAILED DESCRIPTION

[0021] The first embodiment of the fluid dynamic pressure sliding bearing of the utility model is as follows Figure 1 , Figure 2 and Figure 5As shown: it includes a sleeve 1, and at least two rows of grooves 2 are arranged on the inner wall of the sleeve 1, each group of grooves 2 includes a plurality of grooves 2 parallel to each other, and the grooves 2 are composed of a transverse groove 21 and an inclined groove 22 symmetrically arranged on both sides of the transverse groove 21, and the transverse groove 21 is connected at the intersection of the two inclined grooves 22, and the transverse groove 21 is arranged along the arc line of the inner diameter of the sleeve 1, and one of the two inclined grooves 22 extends to the edge of the sleeve 1. The beneficial effect of such arrangement is: such arrangement, by setting the transverse groove 21, the axial lubricating oil film pressure distribution of the bearing can be adjusted more efficiently, and the axial sealing performance can be improved at the same time. As a preferred embodiment, the combination of the two inclined grooves 22 to form an arrow-shaped groove is not limited to circumferential uniform distribution, and can be adjusted according to different performance improvement requirements. The arrow-shaped structure can increase the solid-liquid contact area, enhance the oil storage function, and provide additional oil to the contact surface under the working conditions that are prone to oil starvation such as starting and stopping. This structure is simple, easy to implement, and has a good use effect.

[0022] As a further configuration of this embodiment, the edges of both sides of the transverse groove 21 and the inclined groove 22 are smoothly connected to the bottom surface through arc-shaped transition surfaces. The beneficial effect of this configuration is that through this configuration, the groove 2 structure has an arc-shaped transition surface transition, which can prevent the generation of lubricating oil flow cavitation or turbulence. At the same time, this structure is simple, easy to process, and has a good use effect.

[0023] As a further configuration of this embodiment, a transition groove is provided at the end of the sleeve 1, and the edge of the inclined groove 22 extends to the transition groove. The beneficial effect of this configuration is that the structural layout is more reasonable, the processing is convenient, and the stability of the structure is improved.

[0024] As a further configuration of this embodiment, an angle is formed between the two inclined grooves 22, and the two inclined grooves 22 are sandwiched on both sides of the transverse groove 21. The beneficial effect of this configuration is that the structural combination forms an arrow shape, which is convenient for guiding the stored oil and facilitating the uniform distribution of ink pressure, and has a good use effect.

[0025] The second embodiment of the fluid dynamic pressure sliding bearing of the utility model is as follows Figure 3 and Figure 5As shown: it includes a sleeve 1, and at least two rows of grooves 2 are arranged on the inner wall of the sleeve 1, each group of grooves 2 includes a plurality of grooves 2 parallel to each other, and the grooves 2 are composed of a transverse groove 21 and an inclined groove 22 symmetrically arranged on both sides of the transverse groove 21, and the transverse groove 21 is connected at the intersection of the two inclined grooves 22, and the transverse groove 21 is arranged along the arc line of the inner diameter of the sleeve 1, and one of the two inclined grooves 22 extends to the edge of the sleeve 1. The beneficial effect of such arrangement is: such arrangement, by setting the transverse groove 21, the axial lubricating oil film pressure distribution of the bearing can be adjusted more efficiently, and the axial sealing performance can be improved at the same time. As a preferred embodiment, the combination of the two inclined grooves 22 to form an arrow-shaped groove is not limited to circumferential uniform distribution, and can be adjusted according to different performance improvement requirements. The arrow-shaped structure can increase the solid-liquid contact area, enhance the oil storage function, and provide additional oil to the contact surface under the working conditions that are prone to oil starvation such as starting and stopping. This structure is simple, easy to implement, and has a good use effect.

[0026] As a further configuration of this embodiment, the edges of both sides of the transverse groove 21 and the inclined groove 22 are smoothly connected to the bottom surface through arc-shaped transition surfaces. The beneficial effect of this configuration is that through this configuration, the groove 2 structure has an arc-shaped transition surface transition, which can prevent the generation of lubricating oil flow cavitation or turbulence. At the same time, this structure is simple, easy to process, and has a good use effect.

[0027] As a further configuration of this embodiment, a transition groove is provided at the end of the sleeve 1, and the edge of the inclined groove 22 extends to the transition groove. The beneficial effect of this configuration is that the structural layout is more reasonable, the processing is convenient, and the stability of the structure is improved.

[0028] As a further configuration of this embodiment, an angle is formed between the two inclined grooves 22, and the transverse groove 21 is arranged outside the angle. The beneficial effect of this configuration is that the structure is combined to form a Y shape, which is convenient for guiding and storing oil, and for evenly distributing the ink pressure, and has a good use effect.

[0029] The third embodiment of the fluid dynamic pressure sliding bearing of the utility model is as follows Figure 4 and Figure 5As shown: it includes a sleeve 1, and at least two rows of grooves 2 are arranged on the inner wall of the sleeve 1, each group of grooves 2 includes a plurality of grooves 2 parallel to each other, and the grooves 2 are composed of a transverse groove 21 and an inclined groove 22 symmetrically arranged on both sides of the transverse groove 21, and the transverse groove 21 is connected at the intersection of the two inclined grooves 22, and the transverse groove 21 is arranged along the arc line of the inner diameter of the sleeve 1, and one of the two inclined grooves 22 extends to the edge of the sleeve 1. The beneficial effect of such arrangement is: such arrangement, by setting the transverse groove 21, the axial lubricating oil film pressure distribution of the bearing can be adjusted more efficiently, and the axial sealing performance can be improved at the same time. As a preferred embodiment, the combination of the two inclined grooves 22 to form an arrow-shaped groove is not limited to circumferential uniform distribution, and can be adjusted according to different performance improvement requirements. The arrow-shaped structure can increase the solid-liquid contact area, enhance the oil storage function, and provide additional oil to the contact surface under the working conditions that are prone to oil starvation such as starting and stopping. This structure is simple, easy to implement, and has a good use effect.

[0030] As a further configuration of this embodiment, the edges of both sides of the transverse groove 21 and the inclined groove 22 are smoothly connected to the bottom surface through arc-shaped transition surfaces. The beneficial effect of this configuration is that through this configuration, the groove 2 structure has an arc-shaped transition surface transition, which can prevent the generation of lubricating oil flow cavitation or turbulence. At the same time, this structure is simple, easy to process, and has a good use effect.

[0031] As a further configuration of this embodiment, a transition groove is provided at the end of the sleeve 1, and the edge of the inclined groove 22 extends to the transition groove. The beneficial effect of this configuration is that the structural layout is more reasonable, the processing is convenient, and the stability of the structure is improved.

[0032] As a further configuration of this embodiment, an angle is formed between the two inclined grooves 22, and the transverse groove 21 includes a first groove body and a second groove body connected to each other, wherein the first groove body is arranged in the angle, and the second groove body is arranged outside the angle. The beneficial effect of such a configuration is that it is convenient to guide the stored oil, facilitate the uniform distribution of the ink pressure, and have a good use effect.

[0033] The above example is only one preferred specific example of the present invention. The common changes and substitutions made by those skilled in the art within the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A fluid dynamic pressure sliding bearing, comprising a sleeve, characterized in that: At least two rows of groove groups are arranged on the inner wall of the sleeve, each groove group includes a plurality of grooves parallel to each other, the grooves are composed of a transverse groove and oblique grooves symmetrically arranged on both sides of the transverse groove, the transverse groove is connected at the intersection of two oblique grooves, the transverse groove is arranged along the arc line of the inner diameter of the sleeve, and one of the two oblique grooves extends to the edge of the sleeve.

2. The fluid dynamic sliding bearing according to claim 1, characterized in that: The edges on both sides of the transverse groove and the inclined groove are smoothly connected to the bottom surface through arc-shaped transition surfaces.

3. The fluid dynamic sliding bearing according to claim 1, characterized in that: The end of the shaft sleeve is provided with a transition groove, and the edge of the inclined groove extends to the transition groove.

4. The fluid dynamic pressure sliding bearing according to claim 1, 2 or 3, characterized in that: An angle is formed between the two inclined grooves, and the two inclined grooves are arranged on both sides of the transverse groove.

5. The fluid dynamic pressure sliding bearing according to claim 1, 2 or 3, characterized in that: An angle is formed between the two inclined grooves, and the transverse groove is arranged outside the angle.

6. The fluid dynamic sliding bearing according to claim 1, 2 or 3, characterized in that: An angle is formed between the two inclined grooves, and the transverse groove includes a first groove body and a second groove body connected to each other. The first groove body is arranged in the angle, and the second groove body is arranged outside the angle.

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