Compressor and manufacturing method thereof

Abstract

The invention provides a compressor and a manufacturing method thereof. The compressor comprises a shell; a motor and a cylinder, which are accommodated in the shell; a crankshaft, which is used for transmitting the rotary force of the motor to the cylinder to compress a refrigerant; and a frame, which is fixedly connected with the shell through welding and comprises a main bearing and an auxiliary bearing, wherein the main bearing and the auxiliary bearing define a compression space together with the cylinder and are both provided with an inner hole for supporting the crankshaft, the main bearing is used as one part of the shell and welded with the other parts of the shell to form one body, and the surface of the inner hole of the main bearing is strengthened through induction hardening.

Description

technical field [0001] The invention relates to the field of air conditioners, in particular to a fully enclosed rolling rotor compressor and a manufacturing method thereof. Background technique [0002] In general, a hermetic compressor includes a motor for generating a driving force in an inner space of a hermetically sealed case, and a compression part coupled to the motor for compressing refrigerant. Rolling rotor compressors are mainly used in air conditioners, refrigerators, communication base stations and other related refrigeration and air conditioning fields. The compression principle of the rolling rotor compressor mainly utilizes the rotational force of the motor. [0003] The motor of the prior art rolling rotor compressor has a crankshaft, through which the rotational force of the motor is transmitted to the compression components. For example, if figure 1 As shown, the main structure of the rotary hermetic compressor is as follows: [0004] The upper and lo...

AI Technical Summary

Problems solved by technology

The crankshaft 31' is relatively thin, resulting in an increase in the surface pressure of the upper bearing 4', local working conditions are relatively harsh, and wear is serious

In addition, especially in the case of improper welding of the upper bearing 4' and the sealing shell 2', the axis of the crankshaft may be inclined, and even a small inclination angle may cause wear to concentrate between the upper bearing 4' and the crankshaft 31'

[0009] (2) The welding of the sealed casing 2' and the upper cover 1' and the lower cover 7' may easily cause the deformation of the sealed casing 2'

Since the sealed casing 2' is generally a cylindrical structure, it is easily deformed when it is welded with the upper cover 1' and the lower cover 7'. This not only affects the overall airtightness of the compressor, but also causes the motor to The gap between the rotor and the stator is uneven, which will affect the overall coaxiality of the motor and the crankshaft, bearing parts, cylinder, etc., and reduce the working efficiency and performance of the compressor

[0010] (3) The gap between the inner rotor 32' and the outer stator 33' is poor

The rolling rotor compressors in the prior art are affected by the machining accuracy of parts and the positioning reference of the stator and rotor, so it has not been able to eliminate the problem of bad stator and rotor clearance from the root.

Since the upper bearing 4' is installed in the sealed casing 2', the coaxiality between the bearing surface of the upper bearing 4' itself and the inner wall of the sealed casing 2' is difficult to ensure, and the processing of the upper bearing 4' is extremely difficult.

The outer stator 33' is positioned based on the sealed casing 2'; the inner rotor 32' is positioned based on the crankshaft 31', and the crankshaft 31' is positioned based on the upper bearing 4', so when the upper bearing 4' and the sealed casing 2' are simultaneously When the axiality is not up to standard, the gap between the inner rotor 32' and the outer stator 33' will become very poor, and even cause wear between the inner rotor 32' and the outer stator 33', shorten the service life of the motor, and cause make a lot of noise

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