CN101975226A

CN101975226A - Self-lubricating rolling bearing

Info

Publication number: CN101975226A
Application number: CN 201010540264
Authority: CN
Inventors: 叶军; 牛青波; 王东峰
Original assignee: Luoyang Bearing Science and Technology Co Ltd
Current assignee: Luoyang Bearing Science and Technology Co Ltd
Priority date: 2010-11-11
Filing date: 2010-11-11
Publication date: 2011-02-16

Abstract

The invention discloses a self-lubricating rolling bearing, which comprises an inner bearing ring, an outer bearing ring and a rolling element sandwiched between the inner and outer bearing rings, wherein the parts, in contact with the rolling element, of the inner and outer bearing rings are provided with a trench respectively; and the surface of each trench of the inner and outer bearing rings is provided with a diamond film layer with the thickness H of more than or equal to 0.55 mu m and less than 1 mu m. As the surface of each trench of the inner and outer bearing rings is provided with the diamond layer with the thickness H of more than or equal to 0.55 mu m and less than 1 mu m, the self-lubricating rolling bearing of the invention has a self-lubricating property, realizes oil-free lubrication or less-oil lubrication, solves the technical problem that the working temperature of the rolling bearing is not higher than 800 DEG C, simultaneously avoids the problem of pitting corrosion or fatigue failures and ensures great improvement in the service life.

Description

The selflubricating rolling bearing

Technical field

The present invention relates to a kind of selflubricating rolling bearing, belong to technical field of rolling bearings.

Background technique

At widely used high temperature rolling bearings in field such as space flight navigation, shipping industry, textile manufacturing machine, steam turbine, metallurgical steel rolling equipment, precision instrumentation and mining equiments, as the supporting key foundation part of main frame, in the prior art, this bearing generally is that its component all adopt resistant to elevated temperatures special material, as M50, Cr4Mo4V, material such as W18Cr4VA or heat-resistance stainless steel, the cost costliness, manufacture difficulty is bigger, and surpass under 250 ℃ of situations in the host work temperature, the lubrication system of bearing often lost efficacy.

The common at present high temperature rolling bearing that adopts, be on the metal friction face of bearing matrix, to leave the hole that size is suitable, arrangement is orderly, in the hole, embed the self oiling bearing that has the formation solid oiling agent of self-lubricating property and make then, by metallic matrix high-tensile strength brass bearing load.General this formation solid oiling agent adopts graphite or molybdenum disulfide, and latter's general work temperature is in 300 ℃, and the former operating temperature can not be suitable for high rotating speed, high ambient temperature field in 800 ℃; In addition, be easy on bearing enclose, occur the erosion of spot corrosion or line, so-called spot corrosion is exactly when rolling element contacts with raceway groove, on the raceway groove of low relatively curvature, form the pit or the line hole of microcosmic easily, the existence in these pits or line hole makes bearing the climbing effect occur in running, in-fighting is big, noise is big and vibrations big, very easily makes bearing produce fatigue under this running state and causes damage, thereby influence the working life of bearing.

Summary of the invention

The purpose of this invention is to provide a kind of operating temperature and be higher than 800 ℃, the selflubricating rolling bearing of long service life.

In order to realize above purpose, the technical solution adopted in the present invention is: a kind of selflubricating rolling bearing, comprise bearing inner race, bearing outer ring and be folded in rolling element between the bearing enclose, offer raceway groove respectively with the rolling element contact segment on bearing inner race and the bearing outer ring, described bearing outer ring raceway groove and bearing inner race channel surface are equipped with one deck diamond rete, and the thickness H of this diamond rete is 0.55 μ m≤H＜1 μ m.

Described rolling element is a spherical ball.

Described bearing inner race and bearing outer ring adopt Bearing Steel or stupalith.

Described rolling element adopts stupalith.

Of the present invention group of lubricated rolling bearing, employing all is provided with the diamond rete of one deck 0.55 μ m≤H＜1 μ m in the channel surface of bearing enclose, because the diamond rete has very high hardness (HV2500), good wear-resisting property and splendid high temperature resistant property, at first adopt the thickness that is lower than 1 μ m, can be under the prerequisite that does not influence rolling bearing limit speed and precision, reduce the frictional force of rolling element and channel surface, improve the wear resistance of raceway groove simultaneously, make rolling bearing have self lubricity, realized oil-free lubrication or few oil lubrication, solved the rolling bearing operating temperature simultaneously and be not higher than 800 ℃ technical problem; Secondly the diamond rete is plated on the raceway groove of the bearing enclose that hangs down curvature, balance the difference in hardness between channel surface and the rolling element, strengthened the ability to bear of channel surface, on extremely hard diamond rete, be difficult to form microscopic pockets or line hole, the spot corrosion or line erosion and the tired problem that occur on the bearing channel surface have fundamentally been solved, reduce in-fighting, noise and vibrations when bearing moves, thereby prolonged the working life of bearing; Once more, after bearing uses a period of time, only need the lower rolling element of replacement cost to get final product, effectively protected the higher bearing enclose of cost, reduced the cost of the use of bearing, made things convenient for the maintenance of bearing simultaneously.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of selflubricating housing washer of the present invention;

Fig. 3 is the structural representation of selflubricating rolling bearing inner ring of the present invention.

Embodiment

As shown in Figure 1, 2, 3, the selflubricating rolling bearing of present embodiment comprise that bearing outer ring 1, bearing inner race 3 and folder are established and bearing enclose between ceramic ball 2, bearing inner race and bearing outer ring can adopt Bearing Steel or stupalith; Offer bearing outer ring raceway groove 5 and bearing inner race raceway groove 6 at bearing inner race 3 and bearing outer ring 1 respectively with ceramic ball 2 contact segments, be coated with one deck diamond rete 4 on the surface of bearing outer ring raceway groove 5 and bearing inner race raceway groove 6, the thickness H of this diamond rete 4 is 0.55 μ m≤H＜1 μ m, adopt the diamond rete, can be in the physical dimension that guarantees bearing, under the prerequisite of limit speed and precision, substitute traditional lubricant oil or oiling agent, reduce friction in the bearing arrangement to greatest extent, improve in the bearing, the outer ring contact stress prolongs bearing working life.

Embodiments of the invention are the non-limiting technological scheme of the present invention in order to specification only; wherein rolling element can also adopt cylindricality or taper; belong to the rolling bearing category equally; and rolling bearing of the present invention can adopt other various forms of rolling bearings; for example deep groove ball bearing, angular contact ball bearing etc.; this is the technological means that is equal to replacement for those skilled in the art, and every employing all should fall into protection scope of the present invention in the technological scheme that the channel surface of bearing enclose is coated with the diamond rete.

Claims

1. selflubricating rolling bearing, comprise bearing inner race, bearing outer ring and be folded in rolling element between the bearing enclose, bearing inner race and bearing outer ring offer raceway groove respectively with the rolling element contact segment, it is characterized in that: described bearing outer ring raceway groove and bearing inner race channel surface are equipped with one deck diamond rete, and the thickness H of this diamond rete is 0.55 μ m≤H＜1 μ m.

2. selflubricating rolling bearing according to claim 1 is characterized in that: described rolling element is a spherical ball.

3. selflubricating rolling bearing according to claim 1 is characterized in that: described bearing inner race and bearing outer ring adopt Bearing Steel or stupalith.

4. according to each described selflubricating rolling bearing of claim 1-3, it is characterized in that: described rolling element adopts stupalith.