Volume fluid machine and piston producing method thereof

Abstract

This invention is related to a volumetric fluid compressor, for providing a volumetric fluid machine that has pressure loss is minimized to be as low as a rotary fluid compressor in the process of discharging, and that can be manufactured in an manner that is easier than that of making a spiral fluid compressor. To solution is, within a hollow cylinder having a cross-section constructed of plural curves, letting the rotation angle c of the spindle caused by the moving fluid discharged by the plural outlets, during each compression stroke of individual operation chambers of the volumetric fluid compressor, to be (((N-1) / N) x 360 DEG) < c < 360 DEG, (where N is the number of strips).

Description

[0001] This application is a divisional application of the application No. 97103149.5, the filing date is January 31, 1997, and the invention name is "volumetric fluid machine". technical field [0002] The present invention relates to eg pumps, compressors, expanders etc., and in particular to positive displacement fluid machines. Background technique [0003] As a conventional volumetric fluid machine, for example, a reciprocating fluid machine in which a piston repeatedly reciprocates in a cylindrical cylinder to make the working fluid flow, and a cylindrical piston in a cylindrical cylinder eccentrically rotates. Rotary type (rotary piston type) fluid machine that makes working fluid flow, orbiting the orbiting scroll by engaging a pair of fixed scrolls with spiral scrolls standing upright on the end plate and the orbiting scroll And the scroll type fluid machine that drives working fluid to flow is already known technology. [0004] The advantage of reciprocating fluid...

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Problems solved by technology

[0009] However, since the stroke (about half of the rotary type, the same as the reciprocating type) from the end of suction to the end of discharge of each working chamber formed by several vanes and cylinders constituting the piston is short, the shaft rotation angle θc is about 180° ( 210°), so there is a problem that the flow rate of the fluid is fast during the discharge process, the pressure loss increases, and the performance decreases

In addition, in the fluid machines disclosed in these documents, since the shaft rotation angle from the end of suction to the end of discharge of each working chamber is short, there is a time lag from the end of discharge of the working fluid to the start of the next (compression) stroke (end of suction) , and because the working chamber from the end of suction to the end of discharge is formed by offsetting around the drive shaft, this will cause deterioration of the mechanical balance, as the reaction force from the compressed working fluid will cause the piston to rotate itself, and the excessive A large rotation moment acts on the piston, so there is a problem of reliability affected by blade friction and wear

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