JPS57137779A - Controlling device for working hydraulic pressure - Google Patents

Controlling device for working hydraulic pressure

Info

Publication number
JPS57137779A
JPS57137779A JP56022167A JP2216781A JPS57137779A JP S57137779 A JPS57137779 A JP S57137779A JP 56022167 A JP56022167 A JP 56022167A JP 2216781 A JP2216781 A JP 2216781A JP S57137779 A JPS57137779 A JP S57137779A
Authority
JP
Japan
Prior art keywords
pressure
outlet port
spool
increased
orifice
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
JP56022167A
Other languages
Japanese (ja)
Inventor
Yoshihiro Shimada
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.)
Nisshin Sangyo KK
Tokyo Keiki Inc
Original Assignee
Tokyo Keiki Co Ltd
Nisshin Sangyo KK
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 Tokyo Keiki Co Ltd, Nisshin Sangyo KK filed Critical Tokyo Keiki Co Ltd
Priority to JP56022167A priority Critical patent/JPS57137779A/en
Publication of JPS57137779A publication Critical patent/JPS57137779A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/14—Control of fluid pressure with auxiliary non-electric power
    • G05D16/16—Control of fluid pressure with auxiliary non-electric power derived from the controlled fluid
    • G05D16/166—Control of fluid pressure with auxiliary non-electric power derived from the controlled fluid using pistons within the main valve

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE:To provide a self-control function for a variation of pressure at an outlet port by a method wherein there is provided a spool for controlling a throttling operation. CONSTITUTION:When a pressure at an outlet port P2 is increased, a pressure in a left side oil chamber in the metering spool 1a is increased to move the spool 1a in a rightward direction and an area of the orifice 9 is reduced. Thereby, oil with a pressure of P1 directed from a prossure accommodating valve 2 toward the throttle valve 1 is discharged to the outlet port O, so that the increased pressure at the outlet port P2 is decreased. Even if the orifice 6 is opened too much, a reduced area in the orifice 9 is directly applied. Prevention of the variation in the pressure at the outlet port P2 caused by the spool 1a may function in both cases of increased pressure and decreased pressure. Operation of the manual handle of the pressure adjusting valve 3 causes the pressure P3 in the oil chamber 5 to be increased or decreased, and the spool 1a is moved in a rightward or leftward direction, thereby a throttling for getting the predetermined pressure in the outlet port P2 may be obtained.
JP56022167A 1981-02-19 1981-02-19 Controlling device for working hydraulic pressure Pending JPS57137779A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56022167A JPS57137779A (en) 1981-02-19 1981-02-19 Controlling device for working hydraulic pressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56022167A JPS57137779A (en) 1981-02-19 1981-02-19 Controlling device for working hydraulic pressure

Publications (1)

Publication Number Publication Date
JPS57137779A true JPS57137779A (en) 1982-08-25

Family

ID=12075250

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56022167A Pending JPS57137779A (en) 1981-02-19 1981-02-19 Controlling device for working hydraulic pressure

Country Status (1)

Country Link
JP (1) JPS57137779A (en)

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