CN201679721U

CN201679721U - Powder metallurgy combination bearing for compressor

Info

Publication number: CN201679721U
Application number: CN2010201964317U
Authority: CN
Inventors: 林跃春
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-05-18
Filing date: 2010-05-18
Publication date: 2010-12-22
Anticipated expiration: 2020-05-18

Abstract

A powder metallurgy combination bearing for a compressor comprises a main body formed through powder metallurgy and a bearing outer ring sintered with the main body into a whole, and the bearing outer ring is made of steel material through mechanical processing. The main body is manufactured by fully utilizing the advantages of powder metallurgy material; meanwhile, the bearing outer ring is made of steel material with better welding property through mechanical processing; and the main body and the bearing outer ring are sintered into a whole. The bearing outer ring is directly welded with the casing of the compressor, so that the welding strength is greatly improved, and the problem that a powder metallurgy component can not be welded directly is solved; and at the same time, the manufactured combination bearing has the advantages of high precision of shape and dimension, strength and material utilization ratio and processing speed, good dimensional uniformity and reduced cost; and exhaust holes with special structures or special-shaped and irregular structures can be manufactured and processed. The combination bearing is particularly suitable for being used as an upper or a lower bearing in a rotary type compressor of an air conditioner.

Description

Compressor powder metallurgy combination bearing

Technical field

The utility model relates to the design and the processing of bearing in a kind of air condition compressor (another name " flange "), and that uses on particularly a kind of air condition compressor can be directly and the compressor powder metallurgy combination bearing that welds of compressor case.

Background technique

The product parts that reason powder metallurgy is made can be accomplished few nothing cutting, the stock utilization height, and can directly process the shape and size of required precision, the part stable performance, high conformity, yield rate height, processing speed is fast, the suitable production in enormous quantities in enormous quantities, so processing cost is low, is subjected to the favor of enterprise deeply, existing powdered metal parts has been widely applied to every profession and trade, especially is used widely in household appliances.

But powder metallurgy is porous material, it also has deficiency, as: be applied in the refrigeration plant compressor and use as upper bearing (metal), because of it can absorb some liquid in course of working, moment high temperature when welding makes liquid be transformed into gas and easily blasts, produce the cavity in the welding part, therefore lose welding effect, so the bearing that adopts the powder metallurgy material to make can't directly weld, bearing material in the existing compressor generally adopts cast iron, but this kind bearing, because of the cast iron weldability bad, the lower and compact dimensions of weld strength, the precision of shape is lower, amount of machining is big and conformity size is relatively poor, therefore can't satisfy the requirement of mass production compressor, cast iron adds man-hour in addition, and the non-circular attitude of some special construction shapes all can't be finished with machine-tooled method.

Number of patent application 03144357.5 " bearing of rotary compressor and manufacture method thereof " is only made upper and lower bearing part of the powder metallurgy material, be screwed then on the cylinder that forms compression volume, weld together by cylinder and compressor housing.

Number of patent application 200610129464.8 " the compressor upper bearing (metal) with highly effective exhaust hole " is separately to make of powder metallurgy material exhaust hole body of making and the bearing body that adopts machining to make, offer D type or selenodont or Tai Ji type etc. on the exhaust hole body exhaust port of special shape is arranged, exhaust port body and function screw is fastened on the bearing body, by bearing body and compressor housing welding.

Summary of the invention

Technical problem to be solved in the utility model is: the advantage that makes full use of powder metallurgy, avoid simultaneously the drawback that powdered metal parts can't directly weld again, a kind of compressor powder metallurgy combination bearing is provided, can do the processing of special shape, improve the working efficiency of compressor, the bearing outer ring of available combination bearing directly is welded on the compressor housing again.

The technical scheme in the invention for solving the above technical problem is: compressor powder metallurgy combination bearing, comprise the main body that is shaped by powder metallurgy pressing, also comprise the bearing outer ring that is sintered into one with main body, described bearing outer ring is made by steel material machining.

Described bearing outer ring is the annular ring of band liquid-through hole, made through car cutting and boring by steel material, described main body is placed in the bearing outer ring, main body and bearing outer ring Spielpassung, the gap is 0.01～0.04 millimeter, is fixed into whole powder metallurgy combination bearing through high temperature sintering again.

Described powder metallurgy combination bearing also need carry out the cutting of part car and the vapor-phase oxidation sealing of hole is handled.

Compared with prior art, advantage of the present utility model is: compressor powder metallurgy combination bearing, make full use of powder metallurgy material advantage and be made into the combination bearing main body, select welding performance steel material preferably simultaneously for use, make bearing outer ring through machining, both are through sintering integral body into, directly weld with bearing outer ring and compressor housing, not only weld strength improves greatly, also solved the problem that metallic sintered products can't directly weld, make the combination bearing shape that is made into simultaneously, the dimensional accuracy height, dimensional uniformity is good, and intensity is good, the stock utilization height, processing speed is fast, thereby reduces cost, and also can realize the fabrication and processing of some special constructions or special-shaped irregular exhaust port.

Description of drawings

Fig. 1, sectional view of the present utility model.

The plan view of Fig. 2, Fig. 1.

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is further described.

Preparation by bearing meets the performance requirement prescription, and making with the iron powder by prescription is the mixed powder of main raw material, and design meets the mould of bearing of compressor drawing requirement, is pressed into main body 2 on the special-purpose shaping press of 300 tons of powder metallurgy.Main body 2 is the middle inverted T-shaped that through hole is arranged, the exhaust port (scheming picture) of fluted, exhaust port 2-1 or abnormity on the surface on, and special-shaped exhaust port can improve the performance of compressor, and main body 2 can be made into other shape as required.

According to the bearing outer ring of the requirement design of compressor and shell welding, carry out the car cutting and bearing outer ring is made in boring with steel, bearing outer ring 1 can be other shape as required for having the steel annular ring of mounting hole and liquid-through hole 1-1.

Main body 2 is placed in the bearing outer ring 1, make main body 2 and bearing outer ring 1 Spielpassung, the gap is 0.01～0.04 millimeter, again through the sintering of 1100～1150 ℃ of high temperature sintering furnaces, main body and bearing outer ring that powder metallurgy is shaped are fixed into integral body, utilize the powder metallurgy material of main part to expand and steel outer ring shrinkage character, eliminate the gap, connecting part and produce fastening pressure, by the sintering solid diffusion process, make between powder metallurgy profiled body and the connecting part, steel outer ring and produce metallurgy combination, carry out the processing of part car cutting and vapor-phase oxidation sealing of hole then and make powder metallurgy combination bearing 3.

This powder metallurgy combination bearing 3 is made upper bearing (metal) in the air-conditioning rotary compressor and lower bearing uses (figure does not draw).

Because of the bearing outer ring 1 of powder metallurgy combination bearing 3 by welding performance preferably steel material make, so this combination bearing can directly be weldingly fixed on the casing of compressor, to reduce the distortion of cylinder, solved again simultaneously powder metallurgy material part can't with the direct problem of welding of casing.

Claims

1. compressor powder metallurgy combination bearing comprises the main body (2) that is shaped by powder metallurgy pressing, it is characterized in that also comprising and bearing outer ring (1) that main body (2) is sintered into one that described bearing outer ring (1) is made by steel material machining.

2. compressor powder metallurgy combination bearing according to claim 1, it is characterized in that the annular ring of described bearing outer ring (1) for band liquid-through hole (1-1), make through car cutting and boring by steel material, described main body (2) is placed in the bearing outer ring (1), main body (2) and bearing outer ring (1) Spielpassung, the gap is 0.01～0.04 millimeter, is fixed into whole powder metallurgy combination bearing (3) through high temperature sintering again.

3. compressor powder metallurgy combination bearing according to claim 2 is characterized in that described powder metallurgy combination bearing (3) also need carry out the cutting of part car and the vapor-phase oxidation sealing of hole is handled.