Hybrid crankshaft for refrigeration compressor

Abstract

The invention discloses a hybrid power crank shaft for a refrigeration compressor. The hybrid power crank shaft comprises a crank shaft body, wherein the crank shaft body comprises a crank shaft part, a balance part and a main shaft part; a spiral oil groove is formed in the outer wall of the main shaft part of the crank shaft body; an oil pumping inclined hole extending towards the top of the main shaft part is formed in the lower end of the main shaft part; the oil groove forms a dead point in the top end position of the oil pumping inclined hole; the oil pumping inclined hole and the axis of the main shaft part form an included angle and is inclined towards one side of the dead point; the oil groove forms an oil pass hole communicating the oil groove and the oil pumping inclined hole in the dead point part; and an oil suction pipe which is in butt joint with the oil pumping inclined hole is arranged at the lower end of the main shaft part. According to the hybrid power crank shaft, two oil pumping schemes are adopted, the oil pumping inclined hole and the oil suction pipe provide dual oil pumping power, the oil suction pipe is mounted at the lower part of the oil pumping inclined hole and acts an oil pumping relay function, the hybrid power crank shaft integrates the advantages of an integrated crank shaft and a split crank shaft provided with the oil suction pipe, the defect that the center of the oil pumping inclined hole of the integrated crank shaft cannot overpass the center of the crank shaft is eliminated, and the oil pumping capacity of a minor-diameter crank shaft can be greatly improved.

Description

technical field [0001] The invention is used in the technical field of refrigeration compressors, and in particular relates to a hybrid crankshaft for refrigeration compressors. Background technique [0002] The miniaturization of the compressor requires the size of the crankshaft to be smaller and smaller, especially the outer diameter of the main shaft is smaller and smaller, resulting in a negative impact on the oil pumping capacity of the crankshaft, because the oil pumping capacity is directly related to the centrifugal force, and the centrifugal force is directly related to the radius of gyration. The single powertrain design used in existing crankshaft designs has been unable to meet the demand for smaller crankshaft pump oils. [0003] The existing compressor oil pumping system has only a single pumping power. Traditional integral crankshafts, such as figure 1 As shown in the figure, a pump oil inclined hole is set at the end of the crankshaft for oil pumping; the ...

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Problems solved by technology

[0010] In order to solve the above problems, the present invention provides a hybrid crankshaft for refrigeration compressors, which can take into account the advantages of the integral crankshaft and the split crankshaft to install the oil suction pipe, and eliminate the disadvantage that the center of the oil pump oblique hole of the integral crankshaft cannot exceed the center of the crankshaft , can greatly improve the oil pumping capacity of the small diameter crankshaft

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