CN201502633U

CN201502633U - Wear-resistant bearing bush

Info

Publication number: CN201502633U
Application number: CN2009200720863U
Authority: CN
Inventors: 汪鸿涛; 刘芳
Original assignee: BILL-ANDA (SHANGHAI) LUBRICATING MATERIAL Co Ltd
Current assignee: BILL-ANDA (SHANGHAI) LUBRICATING MATERIAL Co Ltd
Priority date: 2009-05-12
Filing date: 2009-05-12
Publication date: 2010-06-09
Anticipated expiration: 2019-05-12

Abstract

The utility model discloses a wear-resistant bearing bush, which solves the defects of the existing wear-resistant bearing bush that the lubrication function is reduced under the humid or high-temperature environment, and the solid lubrication layer can not meet the fit tolerance between the bearing bush and the slide shaft. The utility model takes TiN as a base layer, and WS2 as a cladding layer. The TiN layer has high rigidity, good wear-resistant performance and good thermal conductivity performance, and also has better anticorrosion performance. The WS2 layer has lubrication property and heat-temperature-resistant performance. The ion implantation technique is adopted to clad the TiN on the steel product body to form the base layer, and the radio frequency sputtering method in the physical vapor deposition technology is adopted to clad the WS2 on the base layer to form the cladding layer with the performance of lubrication, wear-resistance and high-temperature-resistance; the thickness of the obtained double cladding layers is controlled to be micron, thereby, the fit tolerance between the bearing bush and the slide shaft can be met and the processing cost is relatively low.

Description

A kind of anti-friction bearing cover

Technical field

The utility model relates to a kind of bearing housing.

Background technique

Bearing housing is the mechanical moving element of using always, liquid lubrication oil lubrication in addition between common bearing housing and the sliding axle.

CN2487912 discloses a kind of bearing that is coated with solid lubricant layer, and this coating layer is made up of nylon powder, a calcirm-fluoride and tungsten disulfide, is coated in the bearing housing inner peripheral surface of rigidity in the mode of heating.This bearing tackling lubricity, wear resistance and sintering resistance can significantly reduce the frequency and the number of times of fuel feeding in the machine operation engineering.

But the lubricated coating layer of this bearing housing still has following defective:

1. the nylon powder moisture absorption is big, and this coating layer friction factor is big during wet weather, and lubrication effect is poor;

2. the nylon thermal conductivity is little, and thermal expansion coefficient is big, and heat dissipation problem is difficult to solve during work;

3. a calcirm-fluoride friction factor is big, and lubrication effect is poor;

4. this coating layer at high temperature loses lubricating function;

5. this coating layer hardness is low, and wear resistance is undesirable;

6. this coating layer thickness is difficult to control to micrometer level, therefore is difficult to satisfy the fit tolerance between bearing housing and the sliding axle, the processing cost height.

Summary of the invention

For addressing the aforementioned drawbacks, the utility model provides following technical proposals:

A kind of anti-friction bearing cover is that base material is made by the treated rigidity material in surface, and this bearing housing inner peripheral surface is coated with the wearing layer of base layer (1) and coating layer (2) composition.

Described base layer (1) is TiN (titanium nitride) layer, and thickness is 0.01 μ m-10 μ m; Preferred thickness is 0.1 μ m.

Described coating layer (2) is WS ₂(tungsten disulfide) layer, thickness is 0.01 μ m-10 μ m; Preferred thickness is 0.5 μ m.

Described base layer (1) with the combination of bearing housing base material is: with the metal vapor vacuum arc source technology, the TiN coating to the bearing sleeve inner peripheral surface, is formed wear-resisting base layer (1).

Described coating layer (2) with the combination of the bearing housing base material that is coated with base layer (1) is: in the radio-frequency sputtering mode in the physical gas phase deposition technology, with WS ₂Coating forms wear-resisting coating layer (2) to described base layer (1) surface.

The disclosed bearing housing of the utility model adopts TiN as base layer, because TiN coating hardness height, wear resistance is good, and heat-conductive characteristic is good, has good corrosion prevention performance simultaneously.Adopt WS in addition ₂As coating layer, WS ₂Have lubricity and resistance to high temperature.With ion implantation technique TiN is coated in the steel body, forms base layer; In the radio-frequency sputtering mode in the physical gas phase deposition technology, with WS ₂Coating forms the resistant to elevated temperatures coating layer of lubricating and wear-resisting to base layer; Resulting double-deck coating layer THICKNESS CONTROL can satisfy the fit tolerance between bearing housing and the sliding axle at micron order, and processing cost is low relatively.

Description of drawings

Fig. 1: bearing housing schematic representation

Fig. 2: bearing housing sectional drawing

Embodiment:

Fig. 1 centre bearer bush is by

rigidity body

4 and 3 one-tenth of the composite beds that is coated in body.Fig. 2 is the structural representation of drape composite bed 3, by TiN (titanium nitride) base layer 1 and WS ₂(tungsten disulfide) coating layer 2 is formed.

TiN hardness height, the wear resistance ideal, antiseptic property is good, and coating is thin, and heat-conductive characteristic is good.General surperficial enhancement technique is at material surface coating one deck strengthened layer, this strengthened layer and matrix have tangible interface, the coating shedding phenomenon often appears in application, and ion implantation technique is that selected intensified element ionization is processed into ion, quicken by high voltage again, inject matrix surface, the strengthened layer and the matrix of formation do not have separating surface, do not have the sorrow that comes off.Combination force is good between modified layer and matrix, obtains good modified effect thus.TiN is coated in rigidity body 4 with ion implantation technique, forms base layer 1, and thickness is 0.1 μ m.This base layer combines effective with body 4, difficult drop-off, and have the bearing housing of making internal surface and have hard wear resistant and corrosion-resistant effect.

WS ₂Has lubricity.Adopt micron order, highly purified WS ₂As raw material, in the radio-frequency sputtering mode in the physical gas phase deposition technology, with WS ₂Base layer 1 surface of coating to the described bearing housing internal surface forms the coating layer 2 of lubricating and wear-resisting, and thickness is 0.5 μ m.Can anti-650 ℃ of high temperature, low temperature resistant.

The disclosed bearing housing of the utility model is high temperature resistant, and is corrosion-resistant, and friction factor is low, and thickness can control to micrometer level, can satisfy the fit tolerance between bearing housing and the sliding axle.Solve existing problem in the prior art, reached Expected Results.Be suitable for industrialized applying.

Claims

1. an anti-friction bearing cover is that base material is made by the treated rigidity material in surface, it is characterized in that, this bearing housing inner peripheral surface is coated with the wearing layer of base layer (1) and coating layer (2) composition; Described base layer (1) is a titanium nitride layer, and coating layer (2) is the curing tungsten layer.

2. bearing housing as claimed in claim 1 is characterized in that, described base layer (1) thickness is 0.01 μ m-10 μ m.

3. bearing housing as claimed in claim 2 is characterized in that, described base layer (1) thickness is 0.1 μ m.

4. bearing housing as claimed in claim 1 or 2 is characterized in that, described coating layer (2) thickness is 0.01 μ m-10 μ m.

5. bearing housing as claimed in claim 4 is characterized in that, described coating layer (2) thickness is 0.5 μ m.

6. bearing housing as claimed in claim 1 or 2, it is characterized in that, described base layer (1) with the combination of bearing housing base material is: with the metal vapor vacuum arc source technology, the titanium nitride coating to the bearing sleeve inner peripheral surface, is formed wear-resisting base layer (1).

7. bearing housing as claimed in claim 5, it is characterized in that, described coating layer (2), with the combination of the bearing housing base material that is coated with base layer (1) be: in the radio-frequency sputtering mode in the physical gas phase deposition technology, the tungsten disulfide coating to described base layer (1) surface, is formed wear-resisting coating layer (2).