AU2021101402A4

AU2021101402A4 - Dendritic distributed composite surface texture antifriction bearing bush

Info

Publication number: AU2021101402A4
Application number: AU2021101402A
Authority: AU
Inventors: Qianjian Guo; Song Li; Shengkai MEI; Zhiwen Wang; Wei Yuan
Original assignee: Shandong University of Technology
Current assignee: Shandong University of Technology
Priority date: 2021-03-18
Filing date: 2021-03-18
Publication date: 2021-05-13
Anticipated expiration: 2029-03-18

Abstract

Disclosed is a dendritic distributed composite surface texture antifriction bearing bush, and belongs to the technical field of bearing bush manufacturing. The dendritic distributed composite surface texture antifriction bearing bush comprises a 5 semi-circular upper bearing bush, the inner side of the upper bearing bush is provided with a composite surface texture, the composite surface texture comprises a macroscopic oil groove along the circumferential direction of the bearing bush, a macroscopic foreign matter removal oil groove which is arranged in the axial direction of the bearing bush and is connected with the oil groove and a microscopic 10 texture between macroscopic foreign matter removal grooves, the two sides of the macroscopic oil groove are provided with auxiliary oil grooves, and the auxiliary oil grooves are connected with two foreign matter removal grooves along the circumferential direction of the bearing bush. According to the dendritic distributed composite surface texture antifriction bearing bush, the lubricating property of the 15 bearing bush of an engine is remarkably improved, the damage of hard pollutants existing in abrasive grains and lubricating oil caused by relative movement of the bearing bush and a shaft diameter to the bearing bush is effectively relieved, and the service life of the engine is prolonged. 2/3 1 23 4 5 6 FIG. 3 0000000000 000000000 0000000000 0000000000 0000000 FIG. 4

Description

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DENDRITIC DISTRIBUTED COMPOSITE SURFACE TEXTURE ANTIFRICTION BEARING BUSH

TECHNICAL FIELD The present disclosure belongs to the technical field of bearing bush manufacturing, and relates to a connecting rod bearing bush of an engine.

BACKGROUND Bearing bush is an important friction vulnerable part on an engine, sliding friction is generated between the bearing bush and a shaft when the engine operates, the working environment of the bearing bush is severe, the load is large, abrasion and failure are likely to happen, and therefore the engine breaks down. The problems of engine overload, overlarge bearing clearance, inaccurate machining precision and the like can aggravate abrasion of the bearing bush, if abrasive particles generated by abrasion and impurities existing in engine oil cannot be removed in time, when the shaft and the bearing bush move relatively, serious abrasion of the bearing bush, insufficient lubrication of a friction pair of the bearing bush and abrasion of the bearing bush can be caused, and then failure of an internal combustion engine is caused. An existing connecting rod bearing bush is as shown in FIG. 1 and FIG. 2 and is composed of a metal bush back and an alloy layer, an oil groove is formed in a semicircular bearing bush and penetrates through the whole upper bearing bush along the circumferential direction of the bearing bush, the structure has the problems that lubrication is incomplete, impurities in engine cooling oil cannot be removed and the like, and the surface of the bearing bush is prone to being abraded.

SUMMARY The task of the present disclosure is to provide a dendritic distributed composite surface texture antifriction bearing bush, and by designing a specific surface texture, the lubricating state of the bearing bush is improved, and impurities in abrasive particles and oil are retained, so that the problem of abrasion of the bearing bush is solved, and the service life is prolonged. The present disclosure is realized through the following scheme, and a dendritic distributed composite surface texture antifriction bearing bush is provided. The dendritic distributed composite surface texture antifriction bearing bush comprises a semi-circular upper bearing bush, the inner side of the upper bearing bush is provided with a composite surface texture, the composite surface texture comprises a macroscopic oil groove along the circumferential direction of the bearing bush, a macroscopic foreign matter removal oil groove which is arranged in the axial direction of the bearing bush and is connected with the oil groove and a microscopic texture between macroscopic foreign matter removal grooves, the two sides of the macroscopic oil groove are provided with auxiliary oil grooves, and the auxiliary oil grooves are connected with two foreign matter removal grooves along the circumferential direction of the bearing bush.

According to the dendritic distributed composite surface texture antifriction bearing bush, the oil groove is a groove which is formed along the circumferential direction of the bearing bush and is connected with two end surfaces. According to the dendritic distributed composite surface texture antifriction bearing bush, the appearances of the foreign matter removal grooves are circular arcs which are connected with the oil groove and penetrate through the bearing bush. According to the dendritic distributed composite surface texture antifriction bearing bush, the foreign matter removal grooves are distributed in the left and right sides of the oil groove at an interval along the circumferential direction and are opposite to the circular arc directions of the foreign matter removal grooves close to each other along the axial direction and the circumferential direction. According to the dendritic distributed composite surface texture antifriction bearing bush, the diameter of the microscopic texture ranges from 30 to 55pm, and the depth of the microscopic texture ranges from 8 to 35pm. According to the dendritic distributed composite surface texture antifriction bearing bush, the microscopic texture is distributed between the two foreign matter removal grooves. According to the dendritic distributed composite surface texture antifriction bearing bush, the auxiliary oil grooves are triangular grooves connected with the two foreign matter removal grooves. According to the dendritic distributed composite surface texture antifriction bearing bush, a lubricating oil hole penetrating through the bearing bush is formed in the oil groove. The dendritic distributed composite surface texture antifriction bearing bush has the beneficial effects that the diffusion speed of engine oil in a friction pair is increased and the compression resistance of an oil film is improved by matching the arc-shaped dendritic foreign matter removal oil groove with the rotation of the bearing bush; abrasive particles generated in the friction pair and impurities existing in engine oil can be discharged out of the friction pair through the arc-shaped dendritic foreign matter removal oil groove; the auxiliary oil grooves increase the capacity of accommodating foreign matters and the capacity of foreign matters entering the foreign matter removal grooves; the microscopic texture increases the storage of the stored abrasive particles for the engine oil in the friction pair; the composite surface texture has a pit texture and is high in pressure bearing capacity, a part of impurities in the friction pair can be removed through the macroscopic oil groove by means of flowing of oil, frictional wear is reduced, and the service life of the friction pair is prolonged.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a traditional bearing bush. FIG. 2 is an upward view of the traditional bearing bush. FIG. 3 is an upward view of a bearing bush in the present disclosure. FIG. 4 is a partial view of a microscopic texture of the bearing bush in the present disclosure.

FIG. 5 is a partial view of an auxiliary oil groove of the bearing bush in the present disclosure.

DETAILED DESCRIPTION The following detailed description is carried out on the dendritic distributed composite surface texture antifriction bearing bush disclosed by the present disclosure in combination with the accompanying diagram 3 and the accompanying diagram 4 of the specification, and the following embodiment is only used for explaining the present disclosure and does not form limitation on the protection range of the present disclosure. Referring to FIG. 3 and FIG. 4, the dendritic distributed composite surface texture antifriction bearing bush comprises a semi-circular upper bearing bush 1. The oil groove 2 is a groove which is formed along the circumferential direction of the bearing bush and is connected with two end surfaces. The appearances of the foreign matter removal grooves 3 are circular arcs which are connected with the oil groove and penetrate through the bearing bush. The foreign matter removal grooves 3 are circular arc-shaped grooves with the semi-diameters of 4 mm. The foreign matter removal grooves 3 are distributed in the left and right sides of the oil groove at an interval of 100 mm along the circumferential direction and are opposite to the circular arc directions of the foreign matter removal grooves close to each other along the axial direction and the circumferential direction. The diameter of the microscopic texture 4 ranges from 30 to 55pm, and the depth of the microscopic texture 4 ranges from 8 to 35pm, and the microscopic texture 4 is distributed between the two foreign matter removal grooves. The auxiliary oil grooves 5 are triangular grooves connected with the two foreign matter removal grooves. A lubricating oil hole 6 penetrating through the bearing bush is formed in the oil groove 2. According to the working principle, engine oil enters the oil groove 2 and the auxiliary oil grooves 4 from the lubricating oil hole 9, and when the engine oil and impurities in the engine oil move in the auxiliary oil grooves 4 to inlets of the foreign matter removal grooves 2 in the moving process of the bearing bush, due to the width change of the auxiliary oil grooves 4, the flow speed of the engine oil also changes, foreign matter impurities are promoted to enter the foreign matter removal grooves 4 to be removed, the foreign matter removal grooves 4 are in arc shapes, oil cannot be smoothly removed, the oil can enter the area of the microscopic texture 3 to be lubricated under the action of centrifugal force, abrasive particles in the oil are brought out, and the microscopic texture 3 also plays a role in storing the oil and the abrasive particles. The embodiment disclosed above is not used for limiting the present disclosure, the composition of the surface texture is improved, the microscopic texture and the macroscopic texture are combined, and the oil supply capacity, the pressure bearing capacity and the impurity removing capacity of the bearing bush are improved.

Claims

CLAIMS WHAT IS CLAIMED IS: 1. A dendritic distributed composite surface texture antifriction bearing bush, comprising a semi-circular upper bearing bush, wherein the inner side of the upper bearing bush is provided with a composite surface texture, the composite surface texture comprises a macroscopic oil groove along the circumferential direction of the bearing bush, a macroscopic foreign matter removal oil groove which is arranged in the axial direction of the bearing bush and is connected with the oil groove and a microscopic texture between macroscopic foreign matter removal grooves, the two sides of the macroscopic oil groove are provided with auxiliary oil grooves, and the auxiliary oil grooves are connected with two foreign matter removal grooves along the circumferential direction of the bearing bush.
2. The dendritic distributed composite surface texture antifriction bearing bush according to claim 1, wherein the oil groove is a groove which is formed along the circumferential direction of the bearing bush and is connected with two end surfaces.
3. The dendritic distributed composite surface texture antifriction bearing bush according to claim 1, wherein the appearances of the foreign matter removal grooves are circular arcs which are connected with the oil groove and penetrate through the bearing bush; wherein the foreign matter removal grooves are distributed in the left and right sides of the oil groove at an interval along the circumferential direction and are opposite to the circular arc directions of the foreign matter removal grooves close to each other along the axial direction and the circumferential direction.
4. The dendritic distributed composite surface texture antifriction bearing bush according to claim 1, wherein the diameter of the microscopic texture ranges from 30 to 55pm, and the depth of the microscopic texture ranges from 8 to 35pm .
5. The dendritic distributed composite surface texture antifriction bearing bush according to claim 1, wherein the microscopic texture is distributed between the two foreign matter removal grooves; wherein the auxiliary oil grooves are triangular grooves connected with the two foreign matter removal grooves; wherein a lubricating oil hole penetrating through the bearing bush is formed in the oil groove.