JPS57140584A - Method of adjusting capacity of displacement-type multistage compressor - Google Patents

Method of adjusting capacity of displacement-type multistage compressor

Info

Publication number
JPS57140584A
JPS57140584A JP56024464A JP2446481A JPS57140584A JP S57140584 A JPS57140584 A JP S57140584A JP 56024464 A JP56024464 A JP 56024464A JP 2446481 A JP2446481 A JP 2446481A JP S57140584 A JPS57140584 A JP S57140584A
Authority
JP
Japan
Prior art keywords
pressure
calculator
selector
compressor
signal
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.)
Granted
Application number
JP56024464A
Other languages
Japanese (ja)
Other versions
JPH0125907B2 (en
Inventor
Hisakuni Morikawa
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel 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 Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP56024464A priority Critical patent/JPS57140584A/en
Publication of JPS57140584A publication Critical patent/JPS57140584A/en
Publication of JPH0125907B2 publication Critical patent/JPH0125907B2/ja
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/24—Bypassing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

PURPOSE:To economically operate a compressor, by enabling the maximum flow rate of an intermediate-stage by-pass to be varied depending on the actual state of the operation of the compressor to recover as much motive power as possible. CONSTITUTION:A calculator 16 consists of a differential pressure calculator 16a and a pressure ratio calculator 16b. The differential pressure calculator 16a is provided to detect that the pressure difference between the suction and discharge of a last-stage compressor 1c exceeds a prescribed level. The pressure ratio calculator 16b is provided to predict the temperature of discharge from the pressure ratio to detect that the temperature reaches a critical level. The output signals of the calculators 16a, 16b are applied to a first selector 17. When one of the signals has reached its limit value, the signal is applied to a second selector 18 so that the output signal of a pressure detector 8 is kept in its existing state to fix the degree of opening of a pressure control valve 7. Until the limit- value signal is applied to the second selector 18, the pressure control valve 7 is kept open on the basis of the output signal of the pressure detector 8 to increase the flow rate of a by-pass 6 to its allowable limit.
JP56024464A 1981-02-20 1981-02-20 Method of adjusting capacity of displacement-type multistage compressor Granted JPS57140584A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56024464A JPS57140584A (en) 1981-02-20 1981-02-20 Method of adjusting capacity of displacement-type multistage compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56024464A JPS57140584A (en) 1981-02-20 1981-02-20 Method of adjusting capacity of displacement-type multistage compressor

Publications (2)

Publication Number Publication Date
JPS57140584A true JPS57140584A (en) 1982-08-31
JPH0125907B2 JPH0125907B2 (en) 1989-05-19

Family

ID=12138882

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56024464A Granted JPS57140584A (en) 1981-02-20 1981-02-20 Method of adjusting capacity of displacement-type multistage compressor

Country Status (1)

Country Link
JP (1) JPS57140584A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1600630A2 (en) 2004-05-27 2005-11-30 Leobersdorfer Maschinenfabrik AG Multistage gas compressor and its control method
JP2009162090A (en) * 2007-12-28 2009-07-23 Anest Iwata Corp Booster type gas compressor and its control method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1600630A2 (en) 2004-05-27 2005-11-30 Leobersdorfer Maschinenfabrik AG Multistage gas compressor and its control method
EP1600630A3 (en) * 2004-05-27 2009-01-07 Leobersdorfer Maschinenfabrik AG Multistage gas compressor and its control method
JP2009162090A (en) * 2007-12-28 2009-07-23 Anest Iwata Corp Booster type gas compressor and its control method

Also Published As

Publication number Publication date
JPH0125907B2 (en) 1989-05-19

Similar Documents

Publication Publication Date Title
JPS57127738A (en) Operating device of refrigerator
JPS57140584A (en) Method of adjusting capacity of displacement-type multistage compressor
JPS646501A (en) Control apparatus for load sensing hydraulic drive circuit
JPS54108143A (en) Running control method of multistage hydraulic machinery
JPS5628302A (en) Speed control circuit of crane or the like
JPS5773203A (en) Oil pressure circuit
JPS56135781A (en) Apparatus for controlling exhausting pressure and flowing quantity in screw compressor
JPS5740156A (en) Pressure control device in oil pressure circuit
JPS5744786A (en) Automatic pressure control device for vacuum vessel
JPS5560174A (en) Vacuum adjuster for condenser
JPS56132407A (en) Turbine control system
JPS55162000A (en) Method of operating multistage steam ejector
JPS57108473A (en) Control method for propeller type wind-wheel
JPS5710773A (en) Multistage pump turbine
JPS5587880A (en) Protector for compressor
JPS54119113A (en) Closed screw compressor
JPS56156504A (en) Multistage flow rate controller of hydraulic circuit
JPS5531208A (en) Condenser
JPS5512217A (en) Energy saving drive method for compressor
JPS55128673A (en) Method for operation of multi-stage hydraulic machine
JPS54114604A (en) Turbine air bleeding pressure control method
JPS5596383A (en) Changer for number of operating pump
JPS5652591A (en) Speed control method for pump in variable speed operation
JPS55107097A (en) Surging prevention device for centrifugal compressor
JPS5540920A (en) Pressure measurement unit