JPS5572959A - Hydraulic servo valve - Google Patents

Hydraulic servo valve

Info

Publication number
JPS5572959A
JPS5572959A JP14340678A JP14340678A JPS5572959A JP S5572959 A JPS5572959 A JP S5572959A JP 14340678 A JP14340678 A JP 14340678A JP 14340678 A JP14340678 A JP 14340678A JP S5572959 A JPS5572959 A JP S5572959A
Authority
JP
Japan
Prior art keywords
servo valve
hydraulic servo
alloy composed
spool
sleeve
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
JP14340678A
Other languages
Japanese (ja)
Inventor
Kenichi Usami
Yoshimitsu Hida
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 JP14340678A priority Critical patent/JPS5572959A/en
Publication of JPS5572959A publication Critical patent/JPS5572959A/en
Pending legal-status Critical Current

Links

Landscapes

  • Servomotors (AREA)
  • Sliding Valves (AREA)
  • Multiple-Way Valves (AREA)

Abstract

PURPOSE: To make possible the use of a watery oil by constructing the part having at least a metal ring edge on the spool and the sleeve in the hydraulic servo valve of an alloy composed of C, Si, Cr, Fe, B and Ni at a specified ratio.
CONSTITUTION: The part having at least a metal ring edge on the spool and the sleeve is constructed of a Ni-base alloy composed of 0.2W2.0% C, 2W5% Si, 9W 23% Cr, 2W6% Fe, 1W3% B and Ni for the reset by weight. Otherwise, at least the metal ring edge section on the sleeve is constructed of an alloy composed of 0.5W2.0% C, 2W6% Si, 20W23% Cr, 2W4% Fe, 1W3% B and Ni for the rest by weight and the spool is constructed of an Ni-base alloy composed of 0.2W2% C, 2W 5% Si, 9W23% Cr, 2W6% Fe, 1W3% B and Ni for the rest. This allows the improvement in the durability of the hydraulic servo valve even if watery oil is used.
COPYRIGHT: (C)1980,JPO&Japio
JP14340678A 1978-11-22 1978-11-22 Hydraulic servo valve Pending JPS5572959A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14340678A JPS5572959A (en) 1978-11-22 1978-11-22 Hydraulic servo valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14340678A JPS5572959A (en) 1978-11-22 1978-11-22 Hydraulic servo valve

Publications (1)

Publication Number Publication Date
JPS5572959A true JPS5572959A (en) 1980-06-02

Family

ID=15338022

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14340678A Pending JPS5572959A (en) 1978-11-22 1978-11-22 Hydraulic servo valve

Country Status (1)

Country Link
JP (1) JPS5572959A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5633094A (en) * 1994-10-28 1997-05-27 Hitachi, Ltd. Valve having facing layers of co-free Ni-base Alloy
JP2009531087A (en) * 2006-03-24 2009-09-03 邱俊亮 Removable disposable mask and main body of the disposable mask

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5633094A (en) * 1994-10-28 1997-05-27 Hitachi, Ltd. Valve having facing layers of co-free Ni-base Alloy
JP2009531087A (en) * 2006-03-24 2009-09-03 邱俊亮 Removable disposable mask and main body of the disposable mask

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