Fluid machinery

Abstract

The target of this invention is to provide a fluid machine, which realizes the performance improvement and processing cost reduction of an oil supply pump at the same time, and realizes the fluid machine with improved performance and reduced cost. The oil supply pump of the fluid machine comprises: an inner piston that rotates with a rotary radius E corresponding to a rotary center of a rotating shaft; an outer rotor that is freely supported by means of rotating with eccentric quantity corresponding to the rotary center of the rotating shaft, and is penetrably equipped with a pump groove of the inner piston embedded at a clearance; and a pump shell that surrounds the inner piston and outer rotor and is installed at an end part of the rotating shaft. In addition, the thrust of the rotatingshaft is applied to the outer rotor or the inner piston from a rotating cover covering a pump chamber.

Description

technical field [0001] The present invention relates to a fluid machine such as a compressor that imparts rotational power to a working fluid to increase its pressure, an expander that expands a high-pressure working fluid to extract rotational power, or a blower that increases the flow rate of a working fluid, and particularly relates to fluid machines suitable for bearing A fluid machine that achieves both improved energy efficiency and reduced processing costs of the oil supply pump for oil supply. Background technique [0002] In conventional fluid machines of this type, internal gear type trochoidal pumps have been widely used as oil supply pumps like the scroll compressor disclosed in JP-A-10-18980. [0003] [Patent Document 1] Japanese Unexamined Patent Publication No. 10-18980 [0004] The oil supply pump of the fluid machine is responsible for sucking oil from the oil reservoir, supplying it to the bearing, and maintaining the lubricating performance of the bearing...

AI Technical Summary

Problems solved by technology

[0007] However, although this manufacturing method is low-cost, there is a limit to the accuracy of the shape, and there is a limit to the improvement of the performance of the fuel pump using this tooth shape.

As a countermeasure, the case of performing post-processing such as grinding or the case of NC processing at the beginning is considered, but in these methods, the processing cost increases significantly, and cost reduction is again a problem

Thus, in conventional trochoidal pumps, both performance improvement and cost reduction of the oil supply pump cannot be achieved at the same time, and it is extremely difficult to improve the performance of fluid machinery equipped with the oil supply pump at low cost.

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