JPH0227004U

JPH0227004U -

Info

Publication number: JPH0227004U
Application number: JP10560588U
Authority: JP
Priority date: 1988-08-10
Filing date: 1988-08-10
Publication date: 1990-02-22

Description

[Brief explanation of drawings]

第１図はこの考案の第１実施例を示す断面図、
第２図はこの考案の第２実施例を示す断面図、第
３図は第２実施例の変形例の要部のみを示す回路
図、第４図はこの考案の第３実施例を示す断面図
、第５図はこの考案の第４実施例を示す断面図、
第６図は従来の圧力補償付き流量調整弁を例示す
る断面図である。１０，３０…方向流量調整弁、１１，３１，４
１…主スプール弁、１２，３２，４２…弁孔、１
３，１４，３３，３４，４３…油路、２０，５０
，７０…圧力補償弁、２１，５１…副スプール弁
、２３，５３…スプリング室、２６，２８，５６
，５８…油路、２７ａ，２７ｂ，５７ａ，５７ｂ
…油室、４０，６０…流量調整弁。 FIG. 1 is a sectional view showing the first embodiment of this invention;
Fig. 2 is a sectional view showing a second embodiment of this invention, Fig. 3 is a circuit diagram showing only the main parts of a modification of the second embodiment, and Fig. 4 is a sectional view showing a third embodiment of this invention. 5 is a sectional view showing a fourth embodiment of this invention,
FIG. 6 is a cross-sectional view illustrating a conventional pressure-compensated flow rate regulating valve. 10, 30...Directional flow rate adjustment valve, 11, 31, 4
1...Main spool valve, 12, 32, 42...Valve hole, 1
3, 14, 33, 34, 43...oil passage, 20, 50
, 70... Pressure compensation valve, 21, 51... Sub-spool valve, 23, 53... Spring chamber, 26, 28, 56
, 58... Oil path, 27a, 27b, 57a, 57b
...Oil chamber, 40, 60...Flow rate adjustment valve.

Claims

[Scope of Claim for Utility Model Registration] A series includes a flow rate regulating valve equipped with a main spool valve that opens and closes the main line, and a pressure compensation valve equipped with a sub-spool valve that controls the differential pressure before and after the main spool valve to a constant level. In the flow rate adjustment valve with pressure compensation, an oil passage leads a return port of the flow rate adjustment valve to a spring chamber of the pressure compensation valve, and an oil passage leads a load port and a supply pressure port to an oil chamber on the opposite side of the spring chamber, respectively. 1. A flow rate regulating valve with pressure compensation, characterized in that a flow regulating valve with pressure compensation is provided with a passageway so that supply pressure can be introduced into the oil chamber with the main spool valve in a neutral position.