CN202790112U

CN202790112U - Dual-metal bearing

Info

Publication number: CN202790112U
Application number: CN 201220101697
Authority: CN
Inventors: 刘利利
Original assignee: DALIAN HONGRUN COMPOSITE BEARING Co Ltd
Current assignee: DALIAN HONGRUN COMPOSITE BEARING Co Ltd
Priority date: 2012-03-16
Filing date: 2012-03-16
Publication date: 2013-03-13
Anticipated expiration: 2022-03-16

Abstract

The utility model discloses a dual-metal bearing, and belongs to the technical field of a high-performance dual-metal self-lubricating composite bearing. An abrasion-resistant layer of the dual-metal bearing adopts a copper alloy layer of a self-lubricating structure; the copper alloy layer is arranged on the inner surface of an outer ring of the bearing by adopting a dual-metal centrifugal casting mode; and blind holes or penetrating holes can be adopted for embedded holes filled with solid lubricating agents, and the thickness of the copper alloy is generally 0.5-5mm. The dual-metal bearing is simple in structure, improves the production efficiency obviously, breaks through the design concept that copper is abraded by utilizing steel completely traditionally, creates high use value with minimum copper alloy consumption, saves nonferrous metal using amount greatly, and is low in manufacturing cost.

Description

A kind of bimetallic bearing

Technical field

The utility model relates to a kind of bimetallic bearing, belongs to high performance double metal selflubricating composite sliding bearing technical field.

Background technique

Along with the device design manufacturing progressively to maximizing and the large trend development, the demand of high-performance bearing is strengthened day by day.Particularly the sliding bearing of low-speed heave-load proposes stern challenge.High strength copper alloy be to be active in one of important member in the material for sliding bearing field always, according to statistics, the alloy copper sliding axletree use amount occupies more than half rivers and mountains in sliding bearing field.Therefore, how to allow Cu alloy material give play to the problem that performance boundary is the facing of sliding bearing cause.

The working surface of existing copper alloy self oiling bearing is Cuprum alloy face solid lubricant inlaid mostly, its structural type and manufacture method have following several basically: a kind of is to adopt casting method to cast out the whole bearing blank of Cuprum alloy tubular that is, machined inner and outer surface, even cloth hole on slip surface, solid lubricant is embedded in the hole, forms through retrofit again.Because integral body is Cuprum alloy, and in actual applications, when the bearing wear amount reaches 0.5～1mm, just can not satisfy the service precision of equipment fully, need to change bearing, so since, integrated type Cuprum alloy airframe bearing exists a large amount of non-ferrous metals of waste, technique is loaded down with trivial details, cost is high problem.Another kind be with the copper alloy powder spreading on steel plate, form bimetal plate by sintering, and through the repeatedly rolling and processing that eliminates stress, make the low composite board of porosity ratio, roll again and be processed into bearing ring, with equipment steel seat hole internal diameter interference assembling, exist the Product Assembly poor reliability, easily produce displacement and complex structure, loaded down with trivial details, the high in cost of production shortcoming of technique when using.In addition, because sintering process to the restriction of steel plate material, needs to adopt the low low-carbon steel plate of mechanical strength as the bimetal substrate, to such an extent as to extrusion-deformation easily occurs under the working condition of heavy load, can't be complementary with bearing outer ring intensity.The third method is that both form one by the mode of interference fit, are carrying out following process by processing base steel overcoat and copper liner cover.Although in such structure finished product, significantly reduced the use amount of Cuprum alloy, in manufacturing process, need the Cuprum alloy blank material of bulk to process qualified neck bush, and all need fine finishing before the press-fiting of interior external bushing, fabricating cost is high.In addition, the fatal shortcoming of this product is that when the larger variation of serviceability temperature generation occured, the thermal coefficient of expansion of Cuprum alloy and steel bushing is inconsistent, causes magnitude of interference insufficient, " rotating shaft " phenomenon occurs, and was accidents caused owing to be interference fit.So there is hidden danger in this method applicability, restricted application.

Summary of the invention

In order to solve the existing problem of prior art, the utility model provides a kind of bimetallic bearing.This bearing should have simple in structure, saves non-ferrous metal, and processability is good, and bearing capacity is high, the characteristics such as good reliability.

Technical solution of the present invention is: a kind of bimetallic bearing mainly comprises bearing outer ring and wearing layer, described wearing layer adopts the copper alloy layer with self-lubricating structure, copper alloy layer adopts the mode of bimetal centrifugal casting to be arranged on the internal surface of bearing outer ring, inlaid hole runs through copper alloy layer and gos deep into bearing outer ring, be filled with solid lubricant in the inlaid hole, the thickness of copper alloy layer is 0.5～5mm.

Described inlaid hole can adopt the through hole of through-shaft bearing outer-ring.

Described copper alloy layer is to adopt aluminum bronze, aluminium brass, brass, tin bronze or lead bronze to carry out centrifugally cast wearing layer.

The beneficial effects of the utility model are: the wearing layer of this bimetallic bearing adopts the copper alloy layer with self-lubricating structure, copper alloy layer adopts the mode of bimetal centrifugal casting to be arranged on the internal surface of bearing outer ring, the inlaid hole that is filled with solid lubricant can adopt blind hole or penetration hole, and the thickness of copper alloy layer is generally 0.5～5mm.This bimetallic bearing has simple in structure, and manufacturing efficiency significantly improves, and has broken through tradition and has utilized steel to the design concept of copper friction fully, creates higher use value with minimum Cuprum alloy consumption, saves in a large number the non-ferrous metal use amount, and manufacture cost is lower.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is a kind of structural drawing of inlaying the cellular type bimetallic bearing.

Fig. 2 is a kind of structural drawing of oil-groove bimetallic bearing.

Among the figure: 1, bearing outer ring, 2, copper alloy layer, 3, solid lubricant, 4, inlaid hole, 5, oil groove.

Embodiment

Fig. 1,2 shows a kind of structural drawing of inlaying cellular type and oil-groove bimetallic bearing.Among the figure, the wearing layer of inlaying the cellular type bimetallic bearing adopts the copper alloy layer 2 with self-lubricating structure, copper alloy layer 2 adopts the mode of bimetal centrifugal casting to be arranged on the internal surface of bearing outer ring 1, inlaid hole 4 adopts the through hole that runs through copper alloy layer 2 and bearing outer ring 1, also can adopt the blind hole of only going deep into bearing outer ring 1, be filled with solid lubricant 3 in the inlaid hole 4, the thickness of copper alloy layer 2 is generally in 0.5～5mm scope.Copper alloy layer 3 is to adopt aluminum bronze, aluminium brass, brass, tin bronze or lead bronze to carry out centrifugally cast wearing layer.The oil-groove bimetallic bearing is not except adopting solid lubricant 3, and other all is analogous to inlays the cellular type bimetallic bearing.

The manufacture method of above-mentioned bimetallic bearing, adopt the following step:

A. the outer ring before centrifugal casting 1 is carried out roughing on request;

B. clean casting surface, and be coated with borax soln, by the calculating Cuprum alloy consumption of technical requirements, the mode strong bonded by centrifugal casting is to the internal surface of bearing outer ring 1;

C. at the face processing inlaid hole 4 of copper alloy layer 2, the degree of depth is to make by prior art requirement regulation;

D. solid lubricant inlaid 3;

E. be machined to finished product by existing method;

If f. be processed into half-watt, then directly cut along axis, be reprocessed into the product that needs.

Claims

1. bimetallic bearing, it mainly comprises bearing outer ring (1) and wearing layer, it is characterized in that: described wearing layer adopts the copper alloy layer (2) with self-lubricating structure, copper alloy layer (2) adopts the mode of bimetal centrifugal casting to be arranged on the internal surface of bearing outer ring (1), inlaid hole (4) runs through copper alloy layer (2) and gos deep into bearing outer ring (1), be filled with solid lubricant (3) in the inlaid hole (4), the thickness of copper alloy layer (2) is 0.5～5mm.

2. a kind of bimetallic bearing according to claim 1 is characterized in that: the through hole of described inlaid hole (4) employing through-shaft bearing outer-ring (1).

3. a kind of bimetallic bearing according to claim 1 is characterized in that: described copper alloy layer (3) is to adopt aluminum bronze, aluminium brass, brass, tin bronze or lead bronze to carry out centrifugally cast wearing layer.