JPS55152902A - High-pressure servovalve - Google Patents

High-pressure servovalve

Info

Publication number
JPS55152902A
JPS55152902A JP6046379A JP6046379A JPS55152902A JP S55152902 A JPS55152902 A JP S55152902A JP 6046379 A JP6046379 A JP 6046379A JP 6046379 A JP6046379 A JP 6046379A JP S55152902 A JPS55152902 A JP S55152902A
Authority
JP
Japan
Prior art keywords
spool
pressure
port
moved
sealing member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP6046379A
Other languages
Japanese (ja)
Inventor
Takeshi Ichiyanagi
Ichiro Nakamura
Yoshimichi Akasaka
Haruo Watanabe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP6046379A priority Critical patent/JPS55152902A/en
Publication of JPS55152902A publication Critical patent/JPS55152902A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To get a servovalve with minimum leakage even under extra-high pressure, by using a spool equipped with a driving piston at its center as a main valve of the servovalve, the control face of the spool being of a poppet type.
CONSTITUTION: A high-pressure valve 1 is composed of a low-pressure pilot valve 2, made up with a sleeve 4 and spool 5, and high-pressure main valve 3, made up with a sleeve 12 and spool 13. As the spool 13 is moved to the right, for example, through control of the pilot valve 2, a sealing member 19 is pressed toward a stopper 23 by means of a spring 21 and a clearance between a poppet face 17 and the sealing member 19 is expanded to let high-pressure oil P2 reach a port C. At this moment, another poppet face 18 and sealing member 20 are pressed to each other and moved to the right, so that leakage of fluid from a port C' to a drain port T is inhibited. As the spool 13 is moved to the contrary, leakage from the port C' to the drain port T is inhibited.
COPYRIGHT: (C)1980,JPO&Japio
JP6046379A 1979-05-18 1979-05-18 High-pressure servovalve Pending JPS55152902A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6046379A JPS55152902A (en) 1979-05-18 1979-05-18 High-pressure servovalve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6046379A JPS55152902A (en) 1979-05-18 1979-05-18 High-pressure servovalve

Publications (1)

Publication Number Publication Date
JPS55152902A true JPS55152902A (en) 1980-11-28

Family

ID=13142982

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6046379A Pending JPS55152902A (en) 1979-05-18 1979-05-18 High-pressure servovalve

Country Status (1)

Country Link
JP (1) JPS55152902A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58202297A (en) * 1982-04-07 1983-11-25 ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Controller for hydraulic pressure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58202297A (en) * 1982-04-07 1983-11-25 ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Controller for hydraulic pressure

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