Rotary compressor and crankshaft assembly thereof

Abstract

The invention discloses a crankshaft assembly. The crankshaft assembly comprises a crankshaft body, wherein an eccentric part is arranged on the end part of the crankshaft body; the top edge of the axial cross section of the eccentric part is arc-shaped; balance notches are oppositely formed in the two sides of a flange of the eccentric part; the connection line between the vertex of the outer edge of the eccentric part and the rotation centre of the eccentric part, and the axis of the crankshaft body determine a plane; and the two balance notches are symmetrical by taking the plane as a reference plane. During a working process, the two balance notches which are symmetrically formed are capable of effectively shortening the distance between the mass centre of the eccentric part and the rotation centre of the eccentric part, and reducing the balance weight of a compressor, and therefore a friction contact surface between the crankshaft assembly and rollers is effectively reduced on the premise of guaranteeing the strength and the stressed area of a crankshaft structure, then the wear of the related mating parts is reduced, and correspondingly the running reliability of the rotary compressor is improved and the service life of the rotary compressor is prolonged. The invention further discloses a rotary compressor using applying the crankshaft assembly.

Description

technical field [0001] The invention relates to the technical field of compressor supporting equipment, in particular to a crankshaft assembly. The invention also relates to a rotary compressor using the crankshaft assembly. Background technique [0002] Rotary compressors are an essential part of electrical equipment that requires refrigeration, such as air conditioners and refrigerators. As the main component of rotary compressors, the crankshaft assembly has drawn more and more attention to its performance. [0003] At present, during the assembly and use of existing rotary compressors, the high-speed operation of the crankshaft assembly is an important excitation source for the vibration of the rotary compressor. Balanced weight, but can not achieve the ideal balance state, resulting in the overall vibration of the compressor is still large; at the same time, the full contact between the eccentric part of the crankshaft and the roller will directly affect the mechanical...

AI Technical Summary

Problems solved by technology

[0003] At present, during the assembly and use of existing rotary compressors, the high-speed operation of the crankshaft assembly is an important excitation source for the vibration of the rotary compressor. Balanced weight, but can not achieve the ideal balance state, resulting in the overall vibration of the compressor is still large; at the same time, the full contact between the eccentric part of the crankshaft and the roller will directly affect the mechanical efficiency of the pump body, increase the friction torque and friction power consumption, Especially under harsh working conditions, it will have a direct negative impact on the reliability of the compressor and then affect the overall quality of the compressor

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