CN108547860A - A kind of self-lubricating thrust articulated bearing and its manufacturing method - Google Patents

Abstract

The invention discloses a kind of self-lubricating thrust articulated bearing and its manufacturing methods, are related to thrust articulated bearing lubricating area, including inner ring and outer ring, it is characterised in that：Multiple diameters are machined on the surface of the Internal Spherical Surface of the outer ring in 40 120 microns, unevenness of the depth at 10 20 microns, the ratio that the multiple unevenness occupies the surface area of the Internal Spherical Surface of the outer ring is 25% 35%, and kollag is filled in the multiple unevenness.The present invention is processed the outer ring Internal Spherical Surface surface of thrust articulated bearing, form multiple depressions with certain diameter, depth and area ratio/occupancy ratio, and filled polyimide and molybdenum disulfide composite solid lubricating agent in the depression of outer ring Internal Spherical Surface, thrust articulated bearing is set to have the effect of self-lubricating, and in the supporting structure for not changing outer ring Internal Spherical Surface macroscopically, achieve the purpose that the service life and bearing capacity that improve self-lubricating thrust articulated bearing.

Description

A self-lubricating thrust joint bearing and its manufacturing method

technical field

The invention relates to the field of thrust joint bearing lubrication, in particular to a self-lubricating thrust joint bearing and a manufacturing method thereof.

Background technique

Thrust joint bearings are sliding bearings, which consist of an outer ring with an inner spherical surface and an inner ring with an outer spherical surface, and can bear axial loads or combined loads in one direction. The friction between the outer ring and the inner ring is generally in the form of steel against steel, which is relatively prone to wear.

In order to improve the wear resistance of the thrust spherical plain bearing and prolong its service life, it is currently common practice to paste a self-lubricating material liner on the inner spherical working surface of the outer ring of the thrust spherical plain bearing, such as the self-lubricating material liner disclosed in Chinese patent document ZL200520008244.0. The lubricated joint bearing is made of a three-layer composite material of modified polymer plastic, bimetallic solid lubricant and metal matrix, and then pressed into shape. Another example is the self-lubricating angular contact joint bearing disclosed in Chinese patent document ZL201220612696.X, in which a PTFE fabric material is pasted on the inner spherical surface of the outer ring. The methods of the above-mentioned patents all make the thrust joint bearing have the effect of self-lubrication, which reduces wear and tear, but pasting the self-lubricating liner on a large area reduces the load-carrying capacity of the thrust joint bearing, which has certain limitations.

Contents of the invention

The purpose of the present invention is to make up for the defects of the prior art, and to provide a self-lubricating thrust spherical plain bearing and its manufacturing method, which can obtain the excellent self-lubricating effect of the thrust spherical plain bearing without reducing the bearing capacity of the thrust spherical plain bearing.

The technical scheme of the present invention is as follows: a self-lubricating thrust joint bearing, including an inner ring and an outer ring, is characterized in that: the surface of the inner spherical surface of the outer ring is processed with a plurality of diameters of 40-120 microns and a depth of 10- 20 micron micro-dimples, the proportion of the surface area of the inner spherical surface of the outer ring is 25%-35%, and the plurality of micro-dimples are filled with solid lubricant.

Further, the plurality of tiny pits are filled with a solid lubricant in which polyimide and molybdenum disulfide are fully mixed at a mass ratio of 1:5.

Further, the solid lubricant is filled into the plurality of tiny pits through a hot pressing filling process.

Further, before filling the plurality of tiny pits with solid lubricant, the inner spherical surface of the outer ring is polished and ultrasonically cleaned to remove surface burrs and impurities.

A method for manufacturing a self-lubricating thrust joint bearing. The thrust joint bearing includes an inner ring and an outer ring. The manufacturing method includes the following steps:

(1) Process a plurality of tiny pits with a diameter of 40-120 microns and a depth of 10-20 microns on the surface of the inner spherical surface of the outer ring, and the plurality of tiny pits occupy the inner spherical surface of the outer ring The surface area ratio is 25%-35%;

(2) Filling the plurality of tiny pits with solid lubricant;

(3) After the solid lubricant is filled, the inner spherical surface of the outer ring is polished to remove excess solid lubricant.

Further, between the above steps (1) and (2), the following step is also included: polishing and ultrasonic cleaning the inner spherical surface of the outer ring to remove surface burrs and impurities.

Further, the solid lubricant is a mixture of polyimide and molybdenum disulfide in a mass ratio of 1:5.

Further, the solid lubricant is filled into the plurality of tiny pits through a hot pressing filling process.

Further, the steps of the hot press filling process are as follows: weigh the polyimide and molybdenum disulfide according to the mass ratio of 1:5, then fully mix them at room temperature, spread them evenly on the surface of the inner spherical surface of the outer ring, and The surface of the inner spherical surface covered with solid lubricant is covered with a smooth film, and then the surface of the inner spherical surface is pressurized with a pressure loading mold having a surface that matches the surface of the inner spherical surface, and then Put the pressure-loaded mold and outer ring in the pressurized state into a resistance furnace at 260 degrees Celsius that has reached the curing temperature of polyimide, and after heating for 5 minutes, turn off the power and take out the pressure-loaded mold and outer ring, increase Pressurize for a second time, and then continue to put the pressure-loaded mold and outer ring into the resistance furnace for heating for 15 minutes, then take out the pressure-loaded mold and outer ring, and release it after the temperature of the pressure-loaded mold drops to room temperature Pressure, hot pressing filling is completed.

The beneficial effects of the present invention are: processing the inner spherical surface of the outer ring of the thrust joint bearing to form a plurality of cavities with a certain diameter, depth and area occupancy, and filling the cavities on the inner spherical surface of the outer ring with polyimide The composite solid lubricant with molybdenum disulfide makes the thrust joint bearing have self-lubricating effect, and does not change the support structure of the inner spherical surface of the outer ring macroscopically, so as to improve the service life and bearing capacity of the self-lubricating thrust joint bearing.

Description of drawings

Fig. 1 is a schematic diagram of the self-lubricating thrust joint bearing of the present invention.

Among them; 1-inner ring; 2-tiny pits; 3-outer ring.

Detailed ways

The specific implementation manner of the present invention will be briefly described below in conjunction with the accompanying drawings.

As shown in Figure 1, a self-lubricating thrust joint bearing includes an inner ring 1 and an outer ring 3, and the surface of the inner spherical surface of the outer ring 3 is processed with a plurality of diameters of 40-120 microns and a depth of 10-20 Micron micro-dimples 2, the proportion of the plurality of micro-dimples 2 occupying the surface area of the inner spherical surface of the outer ring 3 is 25%-35%, and the plurality of micro-dimples 2 are filled with solid lubricant.

The present invention also protects a method for manufacturing a self-lubricating thrust joint bearing. The thrust joint bearing includes an inner ring 1 and an outer ring 3. The manufacturing method includes the following steps:

(1) Process a plurality of tiny pits 2 with a diameter of 40-120 microns and a depth of 10-20 microns on the surface of the inner spherical surface of the outer ring 3, and the plurality of tiny pits 2 occupy the outer ring The ratio of the surface area of the inner spherical surface of 3 is 25%-35%;

(2) Filling the plurality of tiny dimples 2 with solid lubricant;

(3) After the solid lubricant is filled, the inner spherical surface of the outer ring 3 is polished to remove excess solid lubricant.

The present invention uses micro-texture technology to process the inner spherical surface of the outer ring 3 of the thrust spherical plain bearing to form a plurality of cavities with a certain diameter, depth and area occupancy, and fill the cavities on the inner spherical surface of the outer ring 3 with polyamide The composite solid lubricant of imine and molybdenum disulfide enables the thrust joint bearing to have a self-lubricating effect, and does not change the supporting structure of the inner spherical surface of the outer ring 3 macroscopically. Compared with the traditional method of pasting the self-lubricating material liner, it can obtain the excellent self-lubricating effect of the thrust joint bearing without reducing the bearing capacity of the thrust joint bearing.

Further, in order to improve the self-lubricating effect of the solid lubricant, a plurality of tiny pits 2 are filled with a solid lubricant in which polyimide and molybdenum disulfide are fully mixed at a mass ratio of 1:5; The filling process is filled into the plurality of tiny dimples 2; before filling the plurality of tiny dimples 2 with solid lubricant, the inner spherical surface of the outer ring 3 is polished and ultrasonically cleaned to remove surface burrs and Impurities.

Further, in order to improve the filling effect of the solid lubricant, the steps of the hot-press filling process are as follows: weigh the polyimide and molybdenum disulfide according to the mass ratio of 1:5, then fully mix them at room temperature, spread them evenly on the The surface of the inner spherical surface of the outer ring 3 is covered with a smooth film on the surface of the inner spherical surface covered with solid lubricant, and then the pressure-loaded mold with a surface that matches the surface of the inner spherical surface is applied to the inner spherical surface. The surface of the inner spherical surface is pressurized, and then the pressure-loaded mold and the outer ring 3 in the pressurized state are put into a resistance furnace at 260 degrees Celsius that has reached the curing temperature of polyimide, and after being heated for 5 minutes, the power is turned off and taken out The pressure loading mold and the outer ring 3 are increased for secondary pressurization, and then the pressure loading mold and the outer ring 3 are put into the resistance furnace for heating for 15 minutes, and then the pressure loading mold and the outer ring are taken out 3. After the temperature of the pressure-loaded mold drops to room temperature, the pressure is released, and the hot-press filling is completed.

The present invention is not limited to the specific embodiments described above, and various modifications and changes are possible in the present invention. Any modifications, equivalent replacements, improvements, etc. made to the above implementation methods based on the technical essence of the present invention shall be included in the protection scope of the present invention.

Claims (9)

1. a kind of self-lubricating thrust articulated bearing, including inner ring（1）The outer ring and（3）, it is characterised in that：The outer ring（3）It is interior Multiple diameters are machined on the surface of spherical surface in 40-120 microns, unevenness of the depth at 10-20 microns（2）, the multiple Unevenness（2）Occupy the outer ring（3）Internal Spherical Surface surface area ratio be 25%-35%, the multiple unevenness（2） In be filled with kollag.

2. self-lubricating thrust articulated bearing according to claim 1, which is characterized in that the multiple unevenness（2）In Filled with polyimides and molybdenum disulfide in mass ratio 1:5 well-mixed kollags.

3. self-lubricating thrust articulated bearing according to claim 2, which is characterized in that the kollag passes through hot pressing Fill process is filled into the multiple unevenness（2）In.

4. self-lubricating thrust articulated bearing according to claim 1, which is characterized in that the multiple unevenness （2）Before filled solid lubricant, to the outer ring（3）Internal Spherical Surface be polished and ultrasonic cleaning processing, remove surface Burr and impurity.

5. a kind of manufacturing method of self-lubricating thrust articulated bearing, thrust articulated bearing includes inner ring（1）The outer ring and（3）, the system The method of making includes the following steps：

A, in the outer ring（3）Internal Spherical Surface surface on process multiple diameters in 40-120 microns, depth at 10-20 microns Unevenness（2）, the multiple unevenness（2）Occupy the outer ring（3）Internal Spherical Surface surface area ratio be 25%- 35%；

B, to the multiple unevenness（2）Middle filled solid lubricant；

C, after kollag filling, to the outer ring（3）Internal Spherical Surface be processed by shot blasting, remove extra solid profit Lubrication prescription.

6. the manufacturing method of self-lubricating thrust articulated bearing according to claim 5, which is characterized in that in above-mentioned steps A Further include following steps between B, to the outer ring（3）Internal Spherical Surface be polished and ultrasonic cleaning processing, remove surface Burr and impurity.

7. the manufacturing method of self-lubricating thrust articulated bearing according to claim 5, which is characterized in that the solid lubrication Agent is polyimides and molybdenum disulfide in mass ratio 1:5 well-mixed mixtures.

8. the manufacturing method of self-lubricating thrust articulated bearing according to claim 7, which is characterized in that the solid lubrication Agent is filled by hot pressing fill process in the multiple unevenness.

9. the manufacturing method of self-lubricating thrust articulated bearing according to claim 8, which is characterized in that the hot pressing filling Processing step is as follows：Polyimides and molybdenum disulfide according to mass ratio 1:It is sufficiently mixed at normal temperatures after 5 weighings are good, by it Uniformly it is laid on outer ring（3）Internal Spherical Surface surface, opened in the surface upper cover one of the Internal Spherical Surface for being covered with kollag bright and clean Film, then with the table having with the pressure-loaded mold on the matched surface in surface of the Internal Spherical Surface to the Internal Spherical Surface Face is pressurizeed, then by under pressurized state the pressure-loaded mold and outer ring（3）It puts into and has reached polyimide curing temperature In 260 degrees Celsius of resistance furnace of degree, the power-off taking-up pressure-loaded mold and outer ring after 5min to be heated（3）, increase pressure Power carries out secondary pressurized, then continues the pressure-loaded mold and outer ring（3）It puts into after heating 15min in the resistance furnace Take out the pressure-loaded mold and outer ring（3）, wait for that the pressure-loaded mold temperature is cooled to room temperature and release stress, hot pressing is filled out It charges into.