CN202628826U

CN202628826U - Tank car (TC) radial bearing with high-hardness wear-resisting layer

Info

Publication number: CN202628826U
Application number: CN 201220192058
Authority: CN
Inventors: 杨可成
Original assignee: ROTATE TC BEARING Co Ltd
Current assignee: ROTATE TC BEARING Co Ltd
Priority date: 2012-04-27
Filing date: 2012-04-27
Publication date: 2012-12-26
Anticipated expiration: 2022-04-27

Abstract

The utility model discloses a tank car (TC) radial bearing with a high-hardness wear-resisting layer. The TC radial bearing with the high-hardness wear-resisting layer comprises a bearing steel body, a matrix, a cemented carbide block and a shaft sleeve. The matrix and the cemented carbide block form the wear-resisting layer. Two ends of the wear-resisting layer are provided with an upper stopping mouth and a lower stopping mouth. Micro balls of cemented carbide are embedded in the matrix in well-distributed mode. The grain diameter of each micro ball of cemented carbide ranges from 0.5 millimeter to 0.7 millimeter. The rigidity of the matrix ranges from 45 HRC to 55 HRC. The TC radial bearing with the high-hardness wear-resisting layer can resist long-time scour and abrasion from a flow of sand-carrying drilling fluid. A radial direction friction pair formed by the TC radial bearing has the advantages of being high in rigidity, good in wear-resisting and shock resistance performance, large in bearing load and long in service life. The TC radial bearing with the high-hardness wear-resisting layer can meet requirements of atrocious working conditions such as operation with sand-carrying slurry and possibilities of slurry leakage caused by a cracked TC radial bearing do not exist.

Description

A kind of TC radial bearing with high hardness wear-resisting layer

Technical field

The utility model relates to a kind of TC radial bearing, relates in particular to a kind of improving technology to TC radial bearing working surface.

Background technique

Screw drill normally is made up of bypass valve, screw motor (rotor and stator), universal joint, cod, cemented carbide (TC) radial bearing and live axle; Wherein, The TC radial bearing bears drill bit and cardan shaft and rotates the lateral force that is produced in helicoid hydraulic motor, by drilling fluid cooling and lubricated, this just requires, and the TC radial bearing was both wear-resisting to contain the long erosion of sand drilling liquid flow by anti-; Therefore, the TC radial bearing is to influence the helicoid hydraulic motor critical component in working life.The TC radial bearing comprises Bearing Steel body, matrix, hard alloy blocks and interior or external axle sleeve; Normally combine together through the High Temperature Furnaces sintering process by Bearing Steel body, the matrix, the hard alloy blocks that constitute by casting tungsten carbide powder and immersing alloy; After machining forms; Forming one deck wearing layer on the excircle of internal axle sleeve and on the inner circumference of external axle sleeve; This layer wearing layer is exactly in high-temperature sintering process immersing alloy and firmly plates hard alloy blocks through cast tungsten carbide with capillarity and form; At work, the hard alloy blocks on the bearing in the wearing layer forms the friction working surface to mill, and the hardness of matrix directly influences the hardness of fricting working surface main body (wearing layer); But the hardness that plates the matrix cast tungsten carbide in the existing technology can only reach can not resist about 35HRC and contain the long erosion of sand drain flow, causes the bearing working face life-span not high.And the spillage that ftractures appears in the two ends stop portion of fricting working surface easily, seriously influences its use.

The model utility content

To above-mentioned existing technology; The utility model provides a kind of TC radial bearing with high hardness wear-resisting layer; Can resist and contain the sand drilling liquid flow and it is washed away for a long time and wear and tear, wherein formed radial friction pair has hardness height, corrosion-resistant, shock resistance, bears the outstanding feature that load is big, the life-span is long; The utility model TC radial bearing can be adapted to bad working environments (as in containing the mud of sand grains, working).And, there is not possibilities of cracking and leaching of slurry.

In order to solve the problems of the technologies described above; The technological scheme that a kind of TC radial bearing with high hardness wear-resisting layer of the utility model is achieved is: comprise Bearing Steel body, matrix, hard alloy blocks and axle sleeve; Said matrix and said hard alloy blocks constitute wearing layer, and the two ends of said wearing layer are provided with seam and following seam; Said matrix is embedded with the cemented carbide microballoon, and the particle diameter of said cemented carbide microballoon is 0.5～0.7mm.

Further say, TC radial bearing of the present invention, wherein, the cemented carbide microballoon is for being uniformly distributed with in the said matrix, and the hardness of said matrix is 45～55.

In addition, said last seam and the said axial length of seam down are 3～7mm, and said going up in seam and the said following seam all is embedded with the cemented carbide microballoon.

Compared with prior art, the beneficial effect of the utility model is:

Because the structure of the wearing layer of the inner and outer surface of the utility model TC radial bearing is to be made up of regularly arranged hard alloy blocks and matrix; Matrix is handled through soaking into high temperature sintering by casting tungsten carbide powder, cemented carbide microballoon and immersing alloy, and matrix and hard alloy blocks are fused into one.The hardness of the matrix of existing technology TC radial bearing only reaches about 35HRC; And the cemented carbide microballoon in the matrix of the utility model TC radial bearing has strengthened the hardness of matrix; The hardness that guarantees matrix can reach 45～55HRC, makes radial friction pair in the bearing have corrosion-resistant, shock resistance, bear the outstanding feature that load is big, the life-span is long.

In addition, the seam at wearing layer two ends also is to soak into sintering by casting tungsten carbide powder, cemented carbide microballoon and immersing alloy to constitute, and therefore, can avoid bearing occur in the course of the work the ftractureing phenomenon of spillage.

Description of drawings

The utility model TC radial bearing partly cuts open plan view among Fig. 1;

Fig. 2 is the right elevation of TC radial bearing shown in Figure 1;

Fig. 3 is the left view of TC radial bearing shown in Figure 1;

Fig. 4-the 1st, the plan view of TC radial bearing shown in Figure 1;

Fig. 4-the 2nd, A-A sectional drawing shown in Fig. 4-1;

Fig. 4-the 3rd, I portion partial enlarged drawing among Fig. 4-2.

Among the figure: 1-Bearing Steel body, 2-wearing layer, 3-internal axle sleeve, 4-hard alloy blocks, 51-cemented carbide microballoon, 52-matrix.

Embodiment

Below in conjunction with embodiment the utility model is done to describe in further detail, accompanying drawing only provides cover schematic representation in the axle sleeve with external friction face.

As depicted in figs. 1 and 2; A kind of TC radial bearing with high hardness wear-resisting layer of the utility model comprises Bearing Steel body 1, matrix 52, hard alloy blocks 4 and axle sleeve, and said axle sleeve is external axle sleeve or internal axle sleeve; Internal axle sleeve 3 has been shown among the figure; Said matrix 52 constitutes wearing layer 2 with said hard alloy blocks 4, and the two ends of said wearing layer 2 are provided with seam and following seam, and said upward seam and the said axial length of seam down are 3～7mm; Saidly go up seam and saidly all be embedded with the cemented carbide microballoon in the seam down, said seam and the said seam down gone up can soak into sintering by casting tungsten carbide powder, cemented carbide microballoon 51 and immersing alloy and constitute; Shown in Fig. 4-2 and 4-3; Said matrix 52 is embedded with the cemented carbide microballoon; Said matrix 52 can soak into sintering by casting tungsten carbide powder, cemented carbide microballoon 51 and immersing alloy and constitute, and the particle diameter of said cemented carbide microballoon 51 is 0.5～0.7mm, and cemented carbide microballoon 51 is for being uniformly distributed with in the said matrix 52; The percent by volume that said cemented carbide microballoon 51 accounts for matrix 52 is 75～80%, and the hardness of said matrix 52 is 45～55HRC.

Certainly, on the exterior and interior axle sleeves of bearing, be equipped with technology groove, as be uniformly distributed with the arc groove that is arranged on Bearing Steel body 1 outer surface, shown in Fig. 1, Fig. 2 and Fig. 4-1; Be arranged on the rectangle groove on Bearing Steel body 1 internal surface, as shown in figures 1 and 3, all belong to the common practise in present technique field as for shape, layout and the purposes etc. of technology groove, repeat no more at this.

Also have, the granularity of involved casting tungsten carbide powder is 80～300 orders in the matrix, and the physical dimension of hard alloy blocks is that 5 * 3 * (20～30) mm etc. are common practise equally, and above-mentioned common practise is all unrestricted.

Although top combination figure is described the utility model; But the utility model is not limited to above-mentioned embodiment, and above-mentioned embodiment only is schematically, rather than restrictive; Those of ordinary skill in the art is under the enlightenment of the utility model; Under the situation that does not break away from the utility model aim, can also make a lot of distortion, these all belong within the protection of the utility model.

Claims

1. the TC radial bearing with high hardness wear-resisting layer comprises Bearing Steel body, matrix, hard alloy blocks and axle sleeve, and said matrix and said hard alloy blocks constitute wearing layer, and the two ends of said wearing layer are provided with seam and following seam; It is characterized in that said matrix is embedded with the cemented carbide microballoon, the particle diameter of said cemented carbide microballoon is 0.5～0.7mm.

2. TC radial bearing according to claim 1 is characterized in that, said axle sleeve is external axle sleeve or internal axle sleeve.

3. TC radial bearing according to claim 1 is characterized in that, the hardness of said matrix is 45～55HRC.

4. TC radial bearing according to claim 1 is characterized in that the cemented carbide microballoon is for being uniformly distributed with in the said matrix.

5. TC radial bearing according to claim 1 is characterized in that, said last seam and the said axial length of seam down are 3～7mm, and said going up in seam and the said following seam all is embedded with the cemented carbide microballoon.