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JPS57102587A - Variable-volume type fluid pressure pump apparatus - Google Patents

Variable-volume type fluid pressure pump apparatus

Info

Publication number
JPS57102587A
JPS57102587A JP55177752A JP17775280A JPS57102587A JP S57102587 A JPS57102587 A JP S57102587A JP 55177752 A JP55177752 A JP 55177752A JP 17775280 A JP17775280 A JP 17775280A JP S57102587 A JPS57102587 A JP S57102587A
Authority
JP
Japan
Prior art keywords
pressure
discharge
differential pressure
spool
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
JP55177752A
Other languages
Japanese (ja)
Inventor
Takeshi Horiuchi
Kimio Sekikawa
Fusao Higashida
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.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
Daikin Kogyo Co 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 Daikin Industries Ltd, Daikin Kogyo Co Ltd filed Critical Daikin Industries Ltd
Priority to JP55177752A priority Critical patent/JPS57102587A/en
Publication of JPS57102587A publication Critical patent/JPS57102587A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Positive-Displacement Pumps (AREA)
  • Reciprocating Pumps (AREA)

Abstract

PURPOSE: To enable constant power control or long ramp controll without a special mechanical feed back mechanism, by means of only a combination of a pressure style throttle valve and a flow compensator valve.
CONSTITUTION: When a discharge pressure of a discharge possage 17, coming f from a pump A, is raised over an assigned pressure of a spring 24 of a throttle valve 20, a spool 23 is shifted, the opening degree of an orifice 29 is decreased, flow resistance of fluid is increased and discharge pressure is raised still more, so that the differential pressure between the discharge pressure and the load pressure becomes than the differential pressure determined by a flow compensator valve 40. Consequently, a spool 43 overcomes both a compressive body 45 and the load pressure, shifts in the right direction in the figure, a part of the fluid is introduced into a control passage 47 from a communication passage 44, a plunger 14 is actuated to adjust an inclination angle of a slant plate 6 and the volume of pump discharge is controlled to decrease so as to set the differential pressure between the front of the orifice and its back to be the assigned differential pressure. In this case, the structure of the apparatus whole body may be simplified without a mechanical feed back mechanism.
COPYRIGHT: (C)1982,JPO&Japio
JP55177752A 1980-12-15 1980-12-15 Variable-volume type fluid pressure pump apparatus Pending JPS57102587A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55177752A JPS57102587A (en) 1980-12-15 1980-12-15 Variable-volume type fluid pressure pump apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55177752A JPS57102587A (en) 1980-12-15 1980-12-15 Variable-volume type fluid pressure pump apparatus

Publications (1)

Publication Number Publication Date
JPS57102587A true JPS57102587A (en) 1982-06-25

Family

ID=16036499

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55177752A Pending JPS57102587A (en) 1980-12-15 1980-12-15 Variable-volume type fluid pressure pump apparatus

Country Status (1)

Country Link
JP (1) JPS57102587A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63272974A (en) * 1987-05-01 1988-11-10 Kayaba Ind Co Ltd Power controller for piston pump

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55114894A (en) * 1979-02-21 1980-09-04 Gen Signal Corp Fluid power controller

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55114894A (en) * 1979-02-21 1980-09-04 Gen Signal Corp Fluid power controller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63272974A (en) * 1987-05-01 1988-11-10 Kayaba Ind Co Ltd Power controller for piston pump

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