Split type cylinder seat for refrigerator compressor

Abstract

The invention discloses a split type cylinder seat for a refrigerator compressor. The split type cylinder seat comprises a body, wherein a rotating shaft mounting hole and a cylinder mounting hole are arranged on the body, and a rotating shaft sleeve and a cylinder sleeve are nested in the rotating shat mounting hole and the cylinder mounting hole respectively. The rotating shaft sleeve and the cylinder sleeve are independently arranged in positions where material loss happens easily, so that the body can be made of any material including aluminum alloy, which is light in weight, low in price and non-wear-resistant; and the split type design of the cylinder seat avoids the problem of the expensive material cost of integral casting in the past, reduces the production cost in general and further meet the technical requirements that the cylinder hole and the rotating shaft hole need to be wear resistant and hardly deform. The structure of the split type cylinder seat is simple and reliable, the positioning of a hole shaft is precise, the production and the processing are easy, the production cost is low and the split type cylinder seat is suitable for being used as an accessory of the refrigerator compressor.

Description

technical field [0001] The invention relates to an accessory of a refrigerator compressor, in particular to a cylinder seat for the refrigerator compressor. Background technique [0002] Refrigerator compressor is a necessary part in the refrigeration cycle of refrigerator, which generally includes cylinder block, rotating shaft, piston cylinder, pump oil chamber and other parts. Among them, the cylinder block is a main part, which acts as a support for the installation of rotating shafts, piston cylinders and other parts. The cylinder block used in the traditional refrigerator compressor uses cast iron as the material. First, the blank is cast by casting, and then the blank is finished, and the shaft hole for the rotation of the rotating shaft and the piston cylinder hole for the reciprocating movement of the piston are drilled by turning. , The accuracy of the shape and position tolerance of the two holes is relatively high, and because of the friction and heat generated ...

AI Technical Summary

Problems solved by technology

[0003]1. The cylinder block is made of cast iron, the blank needs to be casted, the blank is relatively heavy, and there are many consumables

[0004]2. The processing volume of the finished parts is relatively large. In order to ensure the key shape and position tolerances, more special equipment needs to be invested

[0005]3. The processes adopted by each processing factory are not exactly the same, the processing procedures are many, the process is long, and the positioning reference is not uniform, resulting in repeated positioning of finished parts. The accuracy is not very high, and the consistency of key geometric tolerance dimensions cannot be well guaranteed

When equipped on a dedicated high-automation production line, key fixtures need to be adjusted frequently during use, which affects assembly efficiency

[0006]4. The whole cycle from blank preparation to finished product assembly is long (blank casting→transport to processing factory for processing→finished product sent to company for testing→finished product put into production)

[0007] An existing invention of an aluminum alloy cylinder block, if the aluminum alloy cast cylinder block is used, the production cost can be saved because the aluminum alloy itself is relatively light. And it has the characteristics of high thermal expansion coefficient (high thermal expansion coefficient can be understood as the material is easy to deform when the temperature rises), if the cylinder block made of integral aluminum alloy material can solve the friction problem between the shaft and the shaft hole, but the cylinder hole and the piston ( Pistons are generally made of powder metallurgy materials or cast iron) There is no effective solution to the friction problem in the industry

The piston moves in the aluminum alloy cylinder bore, and the thermal expansion coefficients of the two materials are different. Due to the influence of high temperature and high pressure during operation, the matching gap between the piston and the cylinder bore will change greatly, which will seriously affect the product performance.

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