Crankshaft for compressor

Abstract

The invention discloses a crankshaft for a compressor and belongs to the technical field of crankshafts. The crankshaft comprises a short shaft, an eccentric part and a long shaft; the top of the eccentric part is fixedly connected with the short shaft; the bottom of the eccentric part is fixedly connected with the long shaft; the long shaft is formed by hinging a twisting strip A and a twisting strip B; the structural strength of the twisted long shaft is relatively high, large torsional stress can be borne, and the long shaft is not easy to bend, twist, deform or break when a surface generates torsional stress during long-time high-speed rotation; the long shaft is prevented from being bent, twisted, deformed or twisted off due to the long-time high-speed rotation; triangular sawteeth are fixedly connected to outer side walls of the short shaft and the eccentric part; an inverted-triangle-shaped oil groove B are formed between the triangular sawteeth, meanwhile, the integrated oil groove is formed in a surface of the long shaft, the triangular structure strength is high, crankshaft breakage caused by the fact that the oil groove are formed in the surface of the crankshaft to affect the crankshaft structure strength is prevented, the internal part of the crankshaft is connected to a steel wire, and the structure strength is further improved.

Description

technical field [0001] The invention relates to the technical field of crankshafts, in particular to a crankshaft for a compressor. Background technique [0002] The crankshaft of the rotary compressor runs at high speed under the support of the upper flange and the lower flange, so that the compressor compresses the gas to do work. Although there is a certain amount of refrigerated oil between the crankshaft, the upper flange and the lower flange for lubrication, there is also a balance weight to balance it. The inertia of the rotor assembly, etc., but due to the large inertia of the rotor assembly, the balance weight cannot achieve ideal balance, the crankshaft and the flange are tightly attached, and the lubrication is not ideal. The conventional lubrication of the crankshaft and the upper flange is mainly through the upper method. The spiral oil groove of the flange is lubricated, and the distribution of lubricating oil is evenly distributed, without distinguishing the m...

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Problems solved by technology

[0004] The crankshaft for compressors disclosed in the above-mentioned patents has the following disadvantages: 1. The crankshaft for compressors disclosed in the above-mentioned patents is a rod with a circular cross section. When the crankshaft runs at high speed, it is easy to generate torsional stress. The torsional stress on the cylindrical cross section increases linearly from the center to the outer surface along the axis of the circular section. The crankshaft is easy to bend, twist, deform or break under the action of torsional stress; 2. The above-mentioned patents In order to achieve even distribution of lubricating oil and enhance the effect of crankshaft lubrication in the crankshaft for compressors published in , rectangular oil grooves are arranged on the surface of the short axis, eccentric part and long axis of the crankshaft, which destroys the integrity of the crankshaft and reduces the structure of the crankshaft. strength, the crankshaft is easy to break; therefore, we propose a crankshaft for compressor

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