CN110273921A - A kind of full working scope composite construction sliding bearing - Google Patents

Abstract

The invention belongs to the technical field of sliding bearings, and discloses a sliding bearing with composite structure under all working conditions. The sliding surface of the sliding bearing is provided with a triple composite texture, and the triple composite texture includes pits evenly arranged on the sliding surface of the sliding bearing. Each dimple group includes the first dimple, the second dimple and the third dimple; the first dimple has the characteristics of small diameter and large depth, which is suitable for low-speed and heavy-load conditions and plays a role in reducing noise and vibration Function; the second dimple has the characteristics of large diameter and shallow depth, which is suitable for high-speed and low-load conditions, making it easier for the bearing to reach the state of dynamic pressure lubrication; the third dimple has the characteristics of moderate diameter and moderate depth, and is suitable for medium-speed, medium-high load conditions It is used to transition to a stable working state when the working condition changes suddenly in a short period of time. The invention designs reasonable multiple textures on the sliding bearing, thereby improving the comprehensive performance of the sliding friction pair structure, effectively reducing the friction coefficient and wear rate, accelerating the formation of the oil film, and improving the bearing capacity, wear resistance and service life.

Description

A composite structure sliding bearing under all working conditions

technical field

The invention relates to the technical field of sliding bearings, in particular to an all-working-condition composite sliding bearing.

Background technique

The friction pair structure is an important structural form of rotating machinery, which directly affects the safety and stable operation of the equipment. With the development of various working machinery towards heavy load, precision and high speed, the requirements for the friction pair structure are constantly increasing. Machining regular topography (also known as surface texture) on the surface of the structure is an important technical means to improve the friction and lubrication performance. The traditional friction pair structure is suitable for high-speed, medium-low load conditions, and there are defects such as the increase of the friction coefficient under the high-speed and heavy-load conditions, the increase of heat generation, thermal deformation of the friction pair structure, and failure of the oil film of the friction pair.

The current technology is to process a single texture on the surface of the friction pair structure to increase the anti-friction performance of the sliding bearing under a certain working condition (high speed and heavy load), but it still remains the same under other working conditions (low speed and heavy load, low speed and medium load, etc.). It is easy to produce friction and wear, cause elastic deformation, reduce the stability of oil film bearing, and interfere with the stable operation of sliding bearings.

Contents of the invention

The invention focuses on solving the technical problems of wear resistance, vibration and noise reduction, and strength of the friction pair structure, and overcomes the fact that the friction pair structure with a single texture only acts on a specific working condition, and the friction under high-speed alternating loads in all working conditions Due to the disadvantages of severe wear, increased heat generation and easy failure of the oil film, a reasonable multiple texture is designed on the sliding bearing, so as to improve the comprehensive performance of the sliding friction pair structure, effectively reduce the friction coefficient and wear rate, accelerate the formation of the oil film, and increase the bearing capacity Ability, wear resistance, and service life, and finally obtain a full-working-condition composite structure sliding bearing with strong wear resistance, low friction coefficient, good noise reduction and vibration reduction performance, and high load-carrying capacity.

In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

A sliding bearing with composite structure under all working conditions, including a sliding bearing, a triple composite texture is provided on the sliding surface of the sliding bearing, and the triple composite texture includes pits evenly arranged on the sliding surface of the sliding bearing groups, each of the groups of dimples includes a first dimple, a second dimple, and a third dimple;

The maximum axial dimension of the first pit is 1-50 microns, and the maximum radial dimension is 2-5 microns; the maximum axial dimension of the second pit is 50-100 microns, and the maximum radial dimension is 5 microns. -30 microns; the maximum axial dimension of the third pit is 100-500 microns, and the maximum radial dimension is 0.2-2 microns in depth.

Further, the proportion of the first dimple, the second dimple and the third dimple on the sliding surface of the sliding bearing is in the range of 1-30%.

Further, the first dimples, the second dimples and the third dimples in each dimple group are sequentially arranged along a straight line at equal intervals in the axial direction.

Further, the first dimples, the second dimples and the third dimples in each dimple group are arranged according to the positions of the endpoints of a triangle.

Further, the radial sections of the first pit, the second pit and the third pit are any one of rectangle, semicircle, triangle, and inverted trapezoid.

Further, the axial cross-sections of the first pit, the second pit and the third pit are any one of circle, ellipse, semicircle and polygon.

The beneficial effects of the present invention are:

The present invention adopts the triple composite texture to optimize the texture distribution of the sliding bearing surface in the friction pair structure, and obtains a full-working-condition composite structure sliding bearing with strong wear resistance, low friction coefficient, good noise reduction and vibration reduction performance, and high load-carrying capacity. bearings.

The triple compound texture arranged on the surface of the sliding bearing in the present invention takes the dimple group as the basic unit to function, and the dimple group contains three different dimples. The present invention makes the bearing capacity of the surface of the sliding bearing close to that of the bearing with the smooth surface through reasonable texture layout, and the friction performance is better than that of the bearing with the smooth surface; The bearing surface is elastically deformed by the non-uniform distribution of force, and the shallower dimples in the dimple group with optimized texture arrangement can enhance the bearing capacity of the sliding bearing, and the matching deep dimples can reduce the friction factor and improve the lubrication performance. The dimple group reduces the maximum oil film pressure and friction of the sliding bearing, increases the minimum oil film thickness, and makes the sliding bearing run more stably. It has been verified by actual experiments that the friction of the smooth and non-textured sliding bearing in the loading experiment under simulated actual working conditions The wear is serious and the friction coefficient is large; the sliding bearing with the three-composite texture quickly enters the super-slip state and the working state is stable in the above experiment under the same conditions.

Description of drawings

Fig. 1 is a schematic structural view of a sliding bearing with a composite structure under full working conditions provided by Embodiment 1 of the present invention;

Fig. 2 is the electron micrograph of the full working condition composite structure sliding bearing provided by embodiment 1 of the present invention;

Fig. 3 is a schematic structural view of a sliding bearing with a composite structure under full working conditions provided by Embodiment 2 of the present invention;

Fig. 4 is the electron micrograph of the full working condition composite structure sliding bearing provided by Example 2 of the present invention;

Fig. 5 is a time-varying diagram of the friction coefficient of the composite structure sliding bearing provided by the present invention;

Fig. 6 is a graph of the friction coefficient of a smooth untextured sliding bearing as a function of time.

In the above figure: 1-sliding bearing; 100-sliding surface; 101-first dimple; 102-second dimple; 103-third dimple.

Detailed ways

The present invention will be described in further detail below by specific embodiment:

The following examples can enable those skilled in the art to understand the present invention more comprehensively, but do not limit the present invention in any way.

Example 1:

As shown in Figures 1 and 2, this embodiment provides a sliding bearing with a composite structure under all working conditions, including a sliding bearing 1, a triple composite texture is provided on the sliding surface of the sliding bearing 1, and the triple composite texture includes multiple Dimple groups, a plurality of dimple groups are evenly arranged on the sliding surface 100 of the sliding bearing 1 .

Each dimple group includes a first dimple 101 , a second dimple 102 and a third dimple 103 . The proportion of the first dimple 101 , the second dimple 102 and the third dimple 103 on the sliding surface 100 of the sliding bearing 1 is in the range of 1-30%.

The maximum dimension of each first pit 101 in the axial direction is 1-50 microns, and the maximum dimension in the radial direction is 2-5 microns. The maximum dimension of each second pit 102 in the axial direction is 50-100 microns, and the maximum dimension in the radial direction is 5-30 microns. The maximum dimension of each third pit 103 in the axial direction is 100-500 microns, and the maximum dimension in the radial direction is 0.2-2 microns.

In this embodiment, the first dimples 101, the second dimples 102, and the third dimples 103 in each dimple group are linearly arranged in the axial direction along a straight line with their central points, and the first The dimples 101 and the second dimples 102 and between the second dimples 102 and the third dimples 103 are arranged at equal intervals. The distance between the first pit 101, the second pit 102 and the third pit 103 ranges from 1-999 microns; in order to make the structure of the sliding bearing 1 more reasonable, preferably, the inner pitch of the pit group is 100-500 microns ; Further preferably, the internal pitch of the pit group is 150 microns. This makes it possible to rationalize the surface structure of the slide bearing 1 . The axial and radial distribution spacing between dimple groups and dimple groups need to be set in consideration of actual working conditions.

The shape of the first pit 101, the second pit 102 and the third pit 103 can have multiple options, and its radial section can be rectangular, semicircular, triangular, inverted trapezoidal, etc., and its axial section can be Circles, ellipses, semicircles, polygons, etc.

The first dimple 101 has the characteristics of small diameter and large depth, which is suitable for low-speed and heavy-load working conditions and plays the role of noise reduction and vibration reduction; the second dimple 102 has the characteristics of large diameter and shallow depth, which is suitable for high-speed and low-load working conditions It makes it easier for the bearing to reach the state of dynamic pressure lubrication; the third dimple 103 has the characteristics of moderate diameter and moderate depth, and is suitable for medium-speed, medium-high load conditions and is used to transition to a stable working state when the working conditions change suddenly in a short period of time. In this embodiment, the first dimples 101, the second dimples 102, and the third dimples 103 in the dimple group are arranged linearly in the axial direction in order, and the shallower dimples in the dimple group enhance the bearing capacity of the bearing. At the same time, the matching deep-diameter dimples can reduce the friction factor and improve the lubrication performance. The moderate dimples stabilize the working state, increase the limit working range of the first two dimples, and strengthen the anti-vibration ability of the shaft. At the same time, the linear arrangement can adjust the maximum oil film pressure. , increase the minimum oil film thickness, and reduce the influence of elastic deformation on unstable working conditions. As shown in Fig. 5 and Fig. 6, it has been verified by actual experiments that the friction and wear of smooth non-textured bearings are serious in the loading experiments under simulated actual working conditions, and the friction coefficient is relatively large (Fig. 6); The textured sliding bearing 1 quickly enters the superslip state and works stably in the experiment under the same conditions (Fig. 5).

Example 2:

As shown in Figures 3 and 4, this embodiment provides a sliding bearing with a composite structure in all working conditions, including a sliding bearing 1, a triple composite texture is provided on the sliding surface of the sliding bearing 1, and the triple composite texture includes multiple Dimple groups, a plurality of dimple groups are evenly arranged on the sliding surface 100 of the sliding bearing 1 .

Each dimple group includes a first dimple 101 , a second dimple 102 and a third dimple 103 . The proportion of the first dimple 101 , the second dimple 102 and the third dimple 103 on the sliding surface 100 of the sliding bearing 1 is in the range of 1-30%.

The maximum dimension of each first pit 101 in the axial direction is 1-50 microns, and the maximum dimension in the radial direction is 2-5 microns. The maximum dimension of each second pit 102 in the axial direction is 50-100 microns, and the maximum dimension in the radial direction is 5-30 microns. The maximum dimension of each third pit 103 in the axial direction is 100-500 microns, and the maximum dimension in the radial direction is 0.2-2 microns.

In this embodiment, the first pits 101, the second pits 102 and the third pits 103 in each pit group are arranged according to the three end points of a triangle with their center points, that is, the first pits 101 It is arranged at equal intervals between the second pits 102 and between the second pits 102 and the third pits 103 . The distance between the first pit 101, the second pit 102 and the third pit 103 ranges from 1-999 microns; in order to make the structure of the sliding bearing 1 more reasonable, preferably, the inner pitch of the pit group is 100-500 microns ; Further preferably, the internal pitch of the pit group is 150 microns. As a result, the surface structure of the slide bearing 1 can be rationalized. The axial and radial distribution spacing between dimple groups and dimple groups need to be set in consideration of actual working conditions.

The shape of the first pit 101, the second pit 102 and the third pit 103 can have multiple options, and its radial section can be rectangular, semicircular, triangular, inverted trapezoidal, etc., and its axial section can be Circles, ellipses, semicircles, polygons, etc.

The first dimple 101 has the characteristics of small diameter and large depth, which is suitable for low-speed and heavy-load working conditions and plays the role of noise reduction and vibration reduction; the second dimple 102 has the characteristics of large diameter and shallow depth, which is suitable for high-speed and low-load working conditions It makes it easier for the bearing to reach the state of dynamic pressure lubrication; the third dimple 103 has the characteristics of moderate diameter and moderate depth, and is suitable for medium-speed, medium-high load conditions and is used to transition to a stable working state when the working conditions change suddenly in a short period of time. In this embodiment, the first dimples 101, the second dimples 102, and the third dimples 103 in the dimple group are arranged in a triangle, and the shallower dimples in the dimple group enhance the bearing capacity of the bearing. The pits can also reduce the friction factor and improve the lubrication performance. The moderate pits stabilize the working state, increase the limit working range of the first two pits, and strengthen the anti-vibration ability of the shaft. At the same time, the triangular arrangement makes the sliding shaft body 1 appear nonlinear excitation vibration When the force (oil film force, sealing force, uneven steam pressure) induces system instability or the stability of the eccentric vibration condition is greatly improved, it plays a positive role in reducing vibration, reducing friction factor and stabilizing the working state.

Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are only illustrative and not restrictive. Those of ordinary skill in the art Under the enlightenment of the present invention, without departing from the gist of the invention and the scope of protection of the claims, personnel can also make specific changes in many forms, and these all belong to the protection scope of the present invention.

Claims (6)

1. A sliding bearing with composite structure in all working conditions, comprising a sliding bearing, characterized in that, the sliding surface of the sliding bearing is provided with a triple composite texture, and the triple composite texture includes groups of dimples on the sliding surface, each said group of dimples comprising a first dimple, a second dimple, and a third dimple; The maximum axial dimension of the first pit is 1-50 microns, and the maximum radial dimension is 2-5 microns; the maximum axial dimension of the second pit is 50-100 microns, and the maximum radial dimension is 5 microns. -30 microns; the maximum axial dimension of the third pit is 100-500 microns, and the maximum radial dimension is 0.2-2 microns in depth. 2. A sliding bearing with composite structure under all working conditions according to claim 1, characterized in that, the first dimple, the second dimple and the third dimple are in the sliding bearing of the sliding bearing. The proportion of surface is in the range of 1-30%. 3. A sliding bearing with composite structure under all working conditions according to claim 1, characterized in that the first dimple, the second dimple and the third dimple in each dimple group The pits are sequentially arranged along a straight line at equal intervals in the axial direction. 4. A sliding bearing with composite structure under all working conditions according to claim 1, characterized in that, the first dimple, the second dimple and the third dimple in each dimple group The dimples are arranged according to the position of the triangle endpoints. 5. A sliding bearing with composite structure under all working conditions according to claim 1, characterized in that the radial sections of the first dimple, the second dimple and the third dimple are rectangular, Any one of semicircle, triangle and inverted trapezoid. 6. A sliding bearing with composite structure under all working conditions according to claim 1, characterized in that the axial cross-sections of the first dimple, the second dimple and the third dimple are circular , ellipse, semicircle, polygon in any one.