JPS6021583U

JPS6021583U - Internal compression ratio variable mechanism of screw compressor with slide valve

Info

Publication number: JPS6021583U
Application number: JP11464383U
Authority: JP
Inventors: 省二吉村
Original assignee: 株式会社神戸製鋼所
Priority date: 1983-07-22
Filing date: 1983-07-22
Publication date: 1985-02-14

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は従来のスライド弁付スクリュ圧縮機の断面図、
第２図は閉込み点の位置と閉込み空間体積との関係を示
すグラフ、第３図はスライド弁移動量と内部圧縮比との
関係を示すグラフ、第４図〜第６図は閉込み点の位置と
ガス体積およびスライド弁の位置との関係を示すグラフ
、第７図は本考案に係るスクリュ圧縮機の断面図、第８
図は第７図中・Ａ部の拡大平面図、第９図は第８図のＩ
−■線断面図、第１０図はスライド弁移動量と内部圧縮
比との関係を示すグラフ、第１１図は内部圧縮比可変機
構の他の実施例を適用したスライド弁の部分平面図、第
１２図は第１１図の■−■線断面図、第１３図はスライ
ド弁移動量と内部圧縮比との関係を示すグラフである。１．１ａ・・・内部圧縮比可変機構、２，２ａ・・・ス
ライド弁、４．４ａ・・・ピストン、５・・・吐出口側
端面、９・・・ガス閉込み面、１３・・・ばね、２２・
・田−夕室、２５・・・吐出口、Ｐｄ・・・吐出圧力。第１１図第１０図Figure 1 is a cross-sectional view of a conventional screw compressor with a slide valve.
Figure 2 is a graph showing the relationship between the position of the confinement point and the confined space volume, Figure 3 is a graph showing the relationship between the slide valve movement amount and internal compression ratio, and Figures 4 to 6 are graphs showing the relationship between the position of the confinement point and the volume of the confined space. A graph showing the relationship between the position of the point, the gas volume, and the position of the slide valve, FIG. 7 is a cross-sectional view of the screw compressor according to the present invention, and FIG.
The figure is an enlarged plan view of part A in Figure 7, and Figure 9 is an enlarged plan view of part A in Figure 8.
10 is a graph showing the relationship between the slide valve movement amount and the internal compression ratio. FIG. 11 is a partial plan view of the slide valve to which another embodiment of the variable internal compression ratio mechanism is applied. FIG. 12 is a sectional view taken along the line ■--■ in FIG. 11, and FIG. 13 is a graph showing the relationship between the slide valve movement amount and the internal compression ratio. 1.1a...Internal compression ratio variable mechanism, 2,2a...Slide valve, 4.4a...Piston, 5...Discharge port side end surface, 9...Gas confinement surface, 13...・Spring, 22・
・Ta-Yu chamber, 25...Discharge port, Pd...Discharge pressure. Figure 11 Figure 10

Claims

[Scope of utility model registration request]

A piston is provided so as to form a part of the end face on the discharge port side of the slide valve and can move forward and backward, and the back surface of the piston is provided with an appropriate elastic member so that the front surface of the piston is flush with the gas trapping surface of the slide valve. The interior of a screw compressor with a slide valve is characterized in that the back surface is communicated with a discharge port so that when the rotor chamber pressure exceeds the discharge pressure, the piston retreats and discharges compressed gas. Compression ratio variable mechanism.