JPH0361187U

JPH0361187U -

Info

Publication number: JPH0361187U
Application number: JP12120989U
Authority: JP
Priority date: 1989-10-17
Filing date: 1989-10-17
Publication date: 1991-06-14
Anticipated expiration: 2004-10-17
Also published as: JP2517867Y2

Description

[Brief explanation of drawings]

第１図は本考案に係る気体圧縮機の縦断面図、
第２図は、気体圧縮機の停止時またば吐出圧力が
低い時の本願ベーン背圧コントロール装置の動作
を示す説明図、第３図は、吐出圧力が高い時の本
願ベーン背圧コントロール装置の動作を示す説明
図、第４図は、吐出圧力の油圧力とベーン背圧室
の油圧力または第２油圧室の油圧力との関係を示
すグラフ、第５図は、従来の気体圧縮機の縦断面
図である。２…フロントサイドブロツク、３…リアサイド
ブロツク、４…ベーン、５…ロータ、６…圧縮機
本体、７…油溜り、９…背圧溝、１０…油経路、
１９…スリーブ、２１…ロツト、２３…弁体、２
４…第１油圧室、２５…第２油圧室、２６…第３
油圧室、２７…バネ、２８…第１連絡路、３０…
第２連絡路。 FIG. 1 is a longitudinal cross-sectional view of a gas compressor according to the present invention;
FIG. 2 is an explanatory diagram showing the operation of the vane back pressure control device of the present invention when the gas compressor is stopped or the discharge pressure is low, and FIG. 3 is an explanatory diagram showing the operation of the vane back pressure control device of the present invention when the discharge pressure is high. An explanatory diagram showing the operation, Fig. 4 is a graph showing the relationship between the hydraulic pressure of the discharge pressure and the hydraulic pressure of the vane back pressure chamber or the hydraulic pressure of the second hydraulic chamber, and Fig. 5 is a graph showing the relationship between the hydraulic pressure of the discharge pressure and the hydraulic pressure of the vane back pressure chamber or the hydraulic pressure of the second hydraulic chamber. FIG. 2...Front side block, 3...Rear side block, 4...Vane, 5...Rotor, 6...Compressor body, 7...Oil sump, 9...Back pressure groove, 10...Oil path,
19... Sleeve, 21... Rod, 23... Valve body, 2
4...First hydraulic chamber, 25...Second hydraulic chamber, 26...Third
Hydraulic chamber, 27... Spring, 28... First communication path, 30...
Second connection route.

Claims

[Claims for Utility Model Registration] A compressor body, a casing with an open end that airtightly surrounds the compressor body and forms an oil reservoir at the rear, and a front side block and a rear side that form the compressor body. A back pressure chamber is provided on the inner surface of the block and communicates with a back pressure groove bored in the rotor on the bottom side of the vane forming the compressor body, and a In a gas compressor comprising an oil path for supplying hydraulic pressure to a back pressure chamber, the oil path is slidably disposed in a sleeve provided in the middle of the oil path, and a first hydraulic chamber, a first hydraulic chamber, and a 2
a spool-shaped valve body that is partitioned into a hydraulic chamber and a third hydraulic chamber, and a second hydraulic chamber that is provided in the first hydraulic chamber that faces one end of the valve body and faces a connecting portion that forms the valve body.
urging means for urging the valve body in a direction that communicates the hydraulic chamber with the oil passage and always keeps the oil passage fully open; and a first hydraulic chamber facing one end of the valve body and the back pressure chamber. and a second communication path that communicates between a third hydraulic chamber facing the other end of the valve body and a second hydraulic chamber facing the connecting portion. Vane back pressure control device.