Internal spiral groove oil suction pipe for variable-frequency refrigerator compressor

Abstract

The invention relates to an internal spiral groove oil suction pipe for a variable-frequency refrigerator compressor, and belongs to the technical field of refrigeration compressor accessories. The internal spiral groove oil suction pipe comprises an oil suction pipe main body and embedded internal spiral grooves, wherein more than one embedded internal spiral grooves which are conical and coaxial with the oil suction pipe main body are formed in the oil suction pipe main body; a cylindrical part of the oil suction pipe main body is fixed through a center hole of a motor rotor, and then connected with the end face of a crankshaft. The internal spiral groove oil suction pipe disclosed by the invention uses an embedded internal spiral groove structure, and is low in oil suction resistance, high in oil pumping capacity, good in lubricating effect, low in linear loss, and long in service life; the compressor is stable and reliable in working; the oil suction pipe main body is fixed through the center hole of the motor rotor, and then connected with the end face of the crankshaft, so that the oil suction pipe is convenient to assemble and simple in manufacturing technology; the internal spiral groove oil suction pipe solves the problems that the existing oil suction pipe is high in oil pumping resistance and low in oil pumping capacity, and has high probability of causing lubrication failure to severely influence the service life of the variable-frequency compressor as an external thread structure is used, and the oil suction pipe is assembled together with the crankshaft or the motor rotor through a tail sleeve.

Description

technical field [0001] The invention relates to an inner spiral groove oil suction pipe used for frequency conversion refrigerator compressors, belonging to the technical field of refrigeration compressor accessories. Background technique [0002] The frequency conversion compressor used in the refrigerator is a fully enclosed structure. The oil suction pipe is a key part of the frequency conversion compressor. The oil suction pipe is generally assembled with the tail sleeve first, and then the tail sleeve is assembled with the crankshaft or the motor rotor. fit structure. Since the lubricating oil of the compressor must go through the oil suction pipe to enter the spiral groove outside the crankshaft to lubricate the crankshaft and the shaft hole of the machine base, and at the same time continue to flow upward along the spiral groove into the crank, and lubricate the large and small parts of the connecting rod through the radial oil holes of the crank. The small head play...

AI Technical Summary

Problems solved by technology

Because the crankshaft speed of the frequency conversion refrigerator compressor varies in a large range, and the oil suction pipes used in the current frequency conversion refrigerator compressors all adopt external thread structure, which makes the pump oil resistance large, and the pump oil volume is small at low speed, which is easy to cause compression. The damage after the engine lubrication fails, and the assembly process is more complicated

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