CN113944690A

CN113944690A - Composite sliding bearing

Info

Publication number: CN113944690A
Application number: CN202111271663.3A
Authority: CN
Inventors: 朱伟; 徐金峰
Original assignee: Jiangsu Ccvi Bearing Co ltd
Current assignee: Jiangsu Ccvi Bearing Co ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-01-18
Also published as: WO2023070797A1

Abstract

The invention provides a composite sliding bearing, wherein two sides of an outer ring are respectively provided with a sealing groove, and a sealing ring is arranged in each sealing groove; a ball loading gap is formed in the end face of one side of the outer ring, the inner ring is loaded into the outer ring through the ball loading gap, and a sealing sheet is arranged on the ball loading gap; the outer ring and the inner ring form a spherical friction pair, the spherical friction pair adopts a self-lubricating mode or an oil lubricating mode, the inner spherical surface of the outer ring and the outer spherical surface of the inner ring can increase the service life in a mode of adding an antifriction coating or a wear-resistant coating, and the impact resistance of the product can be improved by properly reducing the hardness of a matrix while the wear-resistant coating is used; the outer diameter of the outer ring and the inner diameter of the inner ring can be subjected to antifriction design to protect the mounting base hole and the mounting mandrel, and the antifriction design comprises self-lubricating antifriction, oil-lubricating antifriction, coating antifriction, oil-lubricating antifriction + coating antifriction; sealing washer and gasket setting can avoid external impurity to get into work area, prolong the life of bearing.

Description

Composite sliding bearing

Technical Field

The invention belongs to the technical field of machinery, and particularly relates to a composite sliding bearing with impact resistance, high corrosion resistance and long service life.

Background

The bearing is an important basic component in the equipment manufacturing industry, and along with the rapid development of rail traffic such as high-speed rails, subways, airplanes and the like, the development of the bearing industry in China is in an important strategic opportunity. Composite sliding bearings that operate in these particular applications require the following characteristics: (1) the bearing is impact-resistant, and due to the high-speed use environment of the bearing, the product has the characteristics of high toughness, impact resistance and high wear resistance; (2) the corrosion resistance is strong, the bearings are exposed in multiple positions, the temperature is variable, the humidity is high, the severe environment and variable climate need to be adapted, and the requirement on the corrosion resistance of the bearings is very high; (3) the protective performance is high, and the bearing is required to have high protective performance because the use environment is mostly in outdoor and field environments and impurities such as dust, saline water, fine sand particles and oil dirt enter a functional area to cause the failure of the bearing; (4) the bearing has long service life, and the special working environment causes the maintenance to be not frequent, so that the bearing is required to have long service life; (5) the special bearing has a protection function of the matching part, and because other parts installed with the bearing are mostly parts with higher cost and have higher replacement cost, the special bearing has a function of protecting the matching part; (6) anti-drop, in order to prevent that outer lane and mount pad hole from droing or follow the commentaries on classics, need set up anti-skidding device.

Disclosure of Invention

In view of this, the invention provides a composite sliding bearing with impact resistance, high corrosion resistance and long service life, so as to meet various requirements of special working conditions on the composite sliding bearing.

The present invention achieves the above-described object by the following technical means.

A composite sliding bearing comprises a sealing groove respectively arranged at two sides of an outer ring, wherein a sealing ring is arranged in the sealing groove; a ball loading gap is formed in the end face of one side of the outer ring, the inner ring is loaded into the outer ring through the ball loading gap, and a sealing sheet is arranged on the ball loading gap;

the outer ring and the inner ring form a spherical friction pair, and the spherical friction pair adopts a self-lubricating mode or an oil lubricating mode;

the outer diameter of the outer ring and the inner diameter of the inner ring are subjected to antifriction design; the antifriction design comprises self-lubricating antifriction, oil lubrication antifriction, coating antifriction, oil lubrication antifriction and coating antifriction.

In the technical scheme, the oil lubrication mode is that the oil groove and the oil hole are designed on the outer ring or the inner ring, or the oil groove and the oil hole are designed on the outer ring and the inner ring simultaneously.

In the technical scheme, the oil groove is a circumferential groove or a plurality of circumferential grooves.

In the above technical scheme, the oil groove further comprises an axial groove or a plurality of axial grooves.

In the above technical scheme, the oil grooves are cross grooves, and the cross grooves include 8-shaped grooves, cross grooves or grid grooves.

In the above technical scheme, an antifriction coating or a wear-resistant coating is added to the inner ring outer spherical surface, or an antifriction coating or a wear-resistant coating is added to the outer ring inner spherical surface, or an antifriction coating is added to both the inner ring outer spherical surface and the outer ring inner spherical surface, or a wear-resistant coating is added to both the inner ring outer spherical surface and the outer ring inner spherical surface, or an antifriction coating is added to the inner ring outer spherical surface and the outer ring inner spherical surface and a wear-resistant coating is added to the outer ring inner spherical surface.

In the above technical scheme, the antifriction coating comprises a coating containing sulfide, PTFE, graphite and calcium fluoride, and the wear-resistant coating comprises a chromium-plated layer or a carbon film coating or a ceramic coating.

In the above technical solution, the oil lubrication method is: an antifriction coating or a wear-resistant coating is added to the inner ring outer spherical surface, or an antifriction coating or a wear-resistant coating is added to the outer ring inner spherical surface, or an antifriction coating is added to both the inner ring outer spherical surface and the outer ring inner spherical surface, or a wear-resistant coating is added to both the inner ring outer spherical surface and the outer ring inner spherical surface, or an antifriction coating is added to the inner ring outer spherical surface and a wear-resistant coating is added to the outer ring inner spherical surface.

In the technical scheme, the self-lubricating mode is that a self-lubricating material is added on the surface of the inner spherical surface of the outer ring, and the self-lubricating material is a fabric, a shaft sleeve, an FR soft belt, plastic, resin or an embedded self-lubricating composite material.

In the technical scheme, the inner ring outer spherical surface is additionally provided with the wear-resistant coating, and the wear-resistant coating comprises a chromium coating or a carbon film coating or a ceramic coating.

In the technical scheme, the self-lubricating antifriction is realized by pressing or sticking a self-lubricating material on the outer diameter of the outer ring or the inner diameter surface of the inner ring, and the self-lubricating material is a fabric or a shaft sleeve or an FR soft belt or plastic or resin or an embedded self-lubricating composite material.

In the technical scheme, the outer diameter surface of the outer ring or the inner diameter surface of the inner ring is provided with the retaining edge or the retaining ring.

In the technical scheme, the self-lubricating material is designed into a single-flange structure or a double-flange structure.

In the technical scheme, the coating antifriction is realized by adding an antifriction coating on the outer diameter of the outer ring or the inner diameter surface of the inner ring; the antifriction coating comprises a coating containing sulfide, PTFE, graphite and calcium fluoride.

In the above technical scheme, the shapes of the sealing ring and the sealing sheet are O-shaped sealing ring, lip-shaped sealing ring or sheet-shaped sealing ring, and the cross section of the lip-shaped sealing ring comprises Y-shaped, V-shaped, U-shaped, L-shaped, S-shaped and frame-shaped.

In the above technical scheme, a connecting structure is designed on one end face of the outer ring.

In the above technical scheme, the fitting mode of the outer ring and the inner ring can be replaced by: the inner ring is of a double-split structure or the outer ring is of a double-split structure or an outer ring slotted assembly structure or an inner ring and outer ring integral structure.

The invention has the beneficial effects that:

(1) according to the invention, the ball loading notch is formed in the end surface of one side of the outer ring, and the inner ring is loaded into the outer ring through the ball loading notch, so that the inner ring is ensured to be of an integral structure, and the impact resistance of the bearing is improved; the invention can also select the modes of double-split structure of the outer ring, double-split structure of the inner ring, slotted assembly structure of the outer ring, plastic deformation of the integral structure of the inner ring and the outer ring, and the like for matching, has various design and can meet the requirements of various customers; in addition, the spherical friction pair of the bearing can select an antifriction coating or a wear-resistant coating in an oil lubrication mode, and the antifriction design of the inner ring and the outer ring can select the antifriction coating, so that the hardness of a base body can be reduced, and the integral impact resistance of the bearing is improved.

(2) The exposed surfaces (such as the outer ring end surface, the connecting structure and the inner ring end surface) of the bearing can adopt the treatment modes of nickel plating, zinc-nickel alloy plating, cadmium plating, zinc plating, chromium plating, paint spraying, electrophoretic paint spraying, plastic spraying, phosphorization, blackening, passivation and the like, so that the corrosion resistance of the bearing is enhanced.

(3) According to the invention, the two sides of the outer ring are respectively provided with the sealing groove, the sealing ring is arranged in the sealing groove, the end surface of one side of the outer ring is provided with the ball mounting notch, the sealing sheet is arranged on the ball mounting notch, and by arranging the sealing ring and the sealing sheet, external impurities can be prevented from entering a working area, and the service life of the bearing is prolonged; the oil groove in the oil lubrication has various shapes, so that the full lubrication can be ensured, and the service life is prolonged; in addition, the inner ring and the outer ring can be subjected to antifriction design as required, and the long service lives of the customer mounting seat hole and the mounting mandrel are ensured.

Drawings

FIG. 1 is a front view of a composite plain bearing according to the present invention;

FIG. 2 is a cross-sectional view of the composite plain bearing of the present invention;

FIG. 3 is a schematic view of the outer ring structure of the present invention;

FIG. 4 is a schematic view of the inner ring structure of the present invention;

FIG. 5 is a schematic view of a first configuration of the sump according to the present invention;

FIG. 6 is a schematic view of a second configuration of the sump according to the present invention;

FIG. 7 is a schematic view of a third construction of the sump according to the present invention;

FIG. 8 is a schematic view of a fourth construction of the sump according to the present invention;

FIG. 9 is a schematic view of a fifth configuration of the sump according to the present invention;

FIG. 10 is a schematic view of the self-lubricating material adhered according to the present invention;

FIG. 11 is a schematic view of a substrate with ribs according to the present invention;

FIG. 12 is a schematic view of a single flange structure adopted by the self-lubricating material of the present invention;

fig. 13 is a schematic view of a double-flange structure adopted by the self-lubricating material of the invention.

In the figure: 1-outer ring, 2-inner ring, 3-self-lubricating material, 4A-sealing ring, 4B-sealing sheet, 101-inner spherical surface, 102-outer diameter, 103-outer ring end surface, 104-connecting structure, 105-step surface, 106-sealing groove, 107-oil hole, 108-oil groove, 109-ball loading gap, 201-outer spherical surface, 202-inner diameter and 203-inner ring end surface.

Detailed Description

The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.

As shown in fig. 1, 2, 3 and 4, the composite sliding bearing of the present invention comprises an outer ring 1, an inner ring 2, a sealing ring 4A and a sealing sheet 4B, wherein an inner spherical surface 101 of the outer ring 1 contacts with an outer spherical surface 201 of the inner ring 2 to form a pair of spherical friction pairs, which can realize swinging and rotating functions; two sides of the outer ring 1 are respectively provided with a sealing groove 106, and a sealing ring 4A is arranged in each sealing groove 106; the end face of one side of the outer ring 1 is provided with a ball loading gap 109, the inner ring 2 is loaded into the outer ring 1 through the ball loading gap 109, and the sealing sheet 4B is arranged on the ball loading gap 109. One side or both sides terminal surface of outer lane 1 can be equipped with connection structure 104 according to actual demand for be connected with the mount pad hole, prevent that bearing inner race 1 is relative mount pad hole wriggling or drop.

In the sleeve combination mode, the mode that the outer ring 1 is provided with the ball-loading notch 109 is adopted, and modes that the outer ring is of a double-split structure, the inner ring is of a double-split structure, the outer ring is of a slotted assembly structure, the inner ring and the outer ring are processed into an integral structure through plastic deformation and the like can be selected. The assembly mode that the outer ring is provided with the ball mounting notch is simple to assemble, the contact between the inner ring and the outer ring is better after the assembly, the strength is higher, the ball mounting hole can be designed by avoiding the bearing area according to the specific bearing mode of the customer in the radial direction and the axial direction, and the ball mounting hole has easy assembly performance while the bearing capacity is not obviously reduced; the outer ring double-split and the inner ring double-split aim at an environment which cannot design a ball mounting hole due to the design space or an environment with higher bearing requirement, and the two modes can avoid the butt grinding and dislocation between the double half rings by filling the diaphragm in the split area; for products with low opening ratio, an assembly mode of outer ring slotting can be adopted; and for the products with high bearing capacity, high torque and high requirements on contact area, the plastic deformation assembly mode of the whole structure can be adopted.

In order to further satisfy the requirement of high corrosion resistance, the exposed surfaces of the bearing (such as the outer ring end surface 103, the connecting structure 104 and the inner ring end surface 203) can adopt the treatment modes of nickel plating, zinc-plated nickel alloy, cadmium plating, zinc plating, chromium plating, paint spraying, electrophoretic paint, plastic spraying, phosphorization, blackening, passivation and the like to enhance the corrosion resistance.

In order to prevent the outer ring 1 and the mounting seat hole from falling off or following, a connecting structure 104 may be provided on one end surface of the outer ring 1 as needed. The connecting structure 104 of the outer ring 1 can be designed into a flange and the like, and after the outer ring 1 is arranged in the mounting seat hole, the connecting structure 104 and the mounting part are locked, so that relative creeping or falling between the outer ring and the seat hole can be avoided.

The sealing groove 106 of the outer ring 1 is designed on the outer diameter surface of the outer ring or the end surface 103 of the outer ring or the step surface 105 of the outer ring according to specific conditions, and the sealing ring 4A is in close contact with the inner ring 1, so that dust, muddy water, fine sand particles and moisture are prevented from entering a working area, and a high-protection function is achieved. The shape of the sealing ring 4A and the sealing sheet 4B may be an O-ring, a lip-ring or a sheet-shaped sealing ring, and the lip-ring may be divided into Y-shape, V-shape, U-shape, L-shape, S-shape, frame-shape, etc. according to the shape of the cross section.

The spherical friction pair of the bearing adopts two modes of self-lubrication and oil lubrication. (1) Oil lubrication mode: the lubricating medium for oil lubrication is lubricating oil or lubricating grease, in order to enable the lubricating medium to enter a working area and be sufficiently lubricated, an oil groove 108 and an oil hole 107 are designed on an outer ring and an inner ring (only the oil groove and the oil hole are drawn on the outer ring in an inner ring diagram, the oil groove and the oil hole can be only designed on the outer ring or the inner ring or on the outer ring and the inner ring simultaneously), a circumferential groove (figure 5) or a plurality of circumferential grooves can be designed on an inner spherical surface 101 and an outer spherical surface 201, an axial groove or a plurality of axial grooves (figure 6) can be designed on the basis of the circumferential grooves, or crossed grooves (such as 8-shaped grooves (figure 7), cross-shaped grooves (figure 8), grid grooves (figure 9) and the like) are directly designed for lubrication; the inner ring outer spherical surface and the outer ring inner spherical surface can be added with antifriction coatings or wear-resistant coatings to prolong the service life (only the inner ring outer spherical surface can be added with antifriction coatings or wear-resistant coatings, and also only the outer ring inner spherical surface can be added with antifriction coatings or wear-resistant coatings, and also can be added with antifriction coatings simultaneously; the antifriction coating or the wear-resistant coating can be added on the inner ring and the outer ring of the oil hole of the oil groove or used independently; (2) self-lubricating mode: a layer of self-lubricating material is required to be added on the surface of the inner spherical surface of the outer ring, the self-lubricating material can be a fabric or a shaft sleeve or an FR soft belt or plastic or resin, and can also be an embedded self-lubricating composite material, and the outer spherical surface of the inner ring can be provided with a wear-resistant coating in an oil lubricating mode so as to prolong the service life. The wear-resistant coating can be used for properly reducing the hardness of the matrix, so that the wear-resistant coating has better impact resistance.

In order to protect the mounting seat hole and the mounting mandrel, the outer diameter 102 of the outer ring 1 and the inner diameter 202 of the inner ring 2 can be subjected to antifriction design according to needs, the antifriction design comprises self-lubricating antifriction, oil-lubricating antifriction, coating antifriction, oil-lubricating antifriction and coating antifriction, the outer diameter 102 of the outer ring 1 and the inner diameter 202 of the inner ring 2 can be selected from the 4 kinds of antifriction designs respectively, and the selection modes are not restricted with each other. (1) Oil lubrication antifriction: oil grooves and oil holes can be designed on the outer diameter 102 of the outer ring 1 and the inner diameter 202 of the inner ring 2 so as to fully lubricate a lubricating medium; the shape of the oil groove can be selected from one of oil lubrication modes; (2) self-lubricating antifriction: self-lubricating materials (fig. 10, fig. 1 shows that the self-lubricating materials 3 are pressed or adhered on the surface of the inner diameter 202 of the inner ring 2) can be pressed or adhered on the surface of the outer diameter 102 of the outer ring 1 or the surface of the inner diameter 202 of the inner ring 2 for friction reduction, and the self-lubricating materials can be fabrics, shaft sleeves, FR soft belts, plastics or resin, and can also be embedded self-lubricating composite materials; the self-lubricating material and the base body are connected in a press-fitting or bonding mode and the like, so that the self-lubricating material can be prevented from moving or falling relative to the base body (the outer diameter surface of the outer ring or the inner diameter surface of the inner ring); the self-lubricating material is prevented from moving by a mode of self-carrying a flange (figure 11) or externally adding a retainer ring on the base body, and the self-lubricating material can also be designed into a single flange structure as shown in figure 12 or a double flange structure as shown in figure 13; (3) increasing the coating for antifriction: the service life of the mounting hole and the mandrel is prolonged by adding a friction reducing coating (see friction reducing coating in oil lubrication mode) on the surface of the outer diameter 102 of the outer ring 1 or the inner diameter 202 of the inner ring 2.

The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.

Claims

1. The composite sliding bearing is characterized by comprising a sealing groove (106) which is respectively arranged at two sides of an outer ring (1), wherein a sealing ring (4A) is arranged in the sealing groove (106); a ball loading gap (109) is formed in the end face of one side of the outer ring (1), the inner ring (2) is loaded into the outer ring (1) through the ball loading gap (109), and a sealing sheet (4B) is installed on the ball loading gap (109);

the outer ring (1) and the inner ring (2) form a spherical friction pair, and the spherical friction pair adopts a self-lubricating mode or an oil lubricating mode;

the outer diameter (102) of the outer ring (1) and the inner diameter (202) of the inner ring (2) are subjected to antifriction design; the antifriction design comprises self-lubricating antifriction, oil lubrication antifriction, coating antifriction, oil lubrication antifriction and coating antifriction.

2. The composite plain bearing according to claim 1, wherein the oil lubrication means is oil grooves and oil holes formed in the outer ring or the inner ring, or both the oil grooves and the oil holes formed in the outer ring and the inner ring.

3. The composite plain bearing of claim 2, wherein the oil groove is a circumferential groove or a plurality of circumferential grooves.

4. The composite slide bearing according to claim 3, wherein the oil groove further comprises one axial groove or a plurality of axial grooves.

5. The composite slide bearing according to claim 2, wherein the oil grooves are cross grooves comprising 8-shaped grooves, cross grooves or grid grooves.

6. The composite plain bearing according to claim 2, wherein an antifriction coating or a wear-resistant coating is added to the inner ring outer spherical surface, or an antifriction coating or a wear-resistant coating is added to the outer ring inner spherical surface, or an antifriction coating is added to both the inner ring outer spherical surface and the outer ring inner spherical surface, or a wear-resistant coating is added to both the inner ring outer spherical surface and the outer ring inner spherical surface, or an antifriction coating is added to the inner ring outer spherical surface while an antifriction coating is added to the outer ring inner spherical surface, or an antifriction coating is added to the inner ring outer spherical surface while a wear-resistant coating is added to the outer ring inner spherical surface.

7. A composite slide bearing according to claim 6, wherein the antifriction coating comprises a coating comprising sulphide, PTFE, graphite, calcium fluoride and the wear resistant coating comprises a chromium-plated layer or a carbon film coating or a ceramic coating.

8. A composite plain bearing according to claim 1, wherein the oil lubrication means is: an antifriction coating or a wear-resistant coating is added to the inner ring outer spherical surface, or an antifriction coating or a wear-resistant coating is added to the outer ring inner spherical surface, or an antifriction coating is added to both the inner ring outer spherical surface and the outer ring inner spherical surface, or a wear-resistant coating is added to both the inner ring outer spherical surface and the outer ring inner spherical surface, or an antifriction coating is added to the inner ring outer spherical surface and a wear-resistant coating is added to the outer ring inner spherical surface.

9. The composite sliding bearing according to claim 1, wherein the self-lubricating means is to add a self-lubricating material on the inner spherical surface of the outer ring, and the self-lubricating material is a fabric or a shaft sleeve or an FR soft belt or a plastic or a resin or a mosaic self-lubricating composite material.

10. The composite slide bearing according to claim 9, wherein the inner ring outer spherical surface is augmented with a wear resistant coating comprising a chromium plating or a carbon film coating or a ceramic coating.

11. The composite sliding bearing according to claim 1, wherein the self-lubricating antifriction is formed by press-fitting or adhering a self-lubricating material on the surface of the outer diameter (102) of the outer ring (1) or the inner diameter (202) of the inner ring (2), and the self-lubricating material is a fabric or a shaft sleeve or an FR soft belt or plastic or resin or a mosaic self-lubricating composite material.

12. The composite plain bearing of claim 11, wherein the outer ring outer diameter surface or the inner ring inner diameter surface is self-retaining or externally retaining.

13. The composite plain bearing according to claim 11, characterized in that the self-lubricating material is designed in a single-flange configuration or in a double-flange configuration.

14. A composite slide bearing according to claim 11, wherein the coating is anti-friction by adding a friction reducing coating to the outer diameter (102) of the outer ring (1) or to the inner diameter (202) of the inner ring (2); the antifriction coating comprises a coating containing sulfide, PTFE, graphite and calcium fluoride.

15. The composite plain bearing according to claim 1, characterized in that the sealing ring (4A) and the sealing piece (4B) are in the shape of O-rings, lip-rings or sheet-shaped sealing rings, the cross-sectional shape of which lip-rings comprises Y-shape, V-shape, U-shape, L-shape, S-shape, frame-shape.

16. A composite plain bearing according to claim 1, characterized in that the outer ring (1) is designed with a connecting structure (104) on one end face.

17. The composite plain bearing according to claim 1, characterized in that the manner of fitting the outer ring (1) and the inner ring (2) is replaceable by: the inner ring is of a double-split structure or the outer ring is of a double-split structure or an outer ring slotted assembly structure or an inner ring and outer ring integral structure.