JPS5666721A - Measurement device of total efficiency for hydraulic pump or motor - Google Patents

Measurement device of total efficiency for hydraulic pump or motor

Info

Publication number
JPS5666721A
JPS5666721A JP14200179A JP14200179A JPS5666721A JP S5666721 A JPS5666721 A JP S5666721A JP 14200179 A JP14200179 A JP 14200179A JP 14200179 A JP14200179 A JP 14200179A JP S5666721 A JPS5666721 A JP S5666721A
Authority
JP
Japan
Prior art keywords
temperature difference
pressure
total efficiency
delivery
hydraulic pump
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
JP14200179A
Other languages
Japanese (ja)
Inventor
Michio Kano
Osamichi Yamada
Norimitsu Tamura
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.)
Nachi Fujikoshi Corp
Original Assignee
Nachi Fujikoshi Corp
Fujikoshi 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 Nachi Fujikoshi Corp, Fujikoshi KK filed Critical Nachi Fujikoshi Corp
Priority to JP14200179A priority Critical patent/JPS5666721A/en
Publication of JPS5666721A publication Critical patent/JPS5666721A/en
Pending legal-status Critical Current

Links

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  • Control Of Positive-Displacement Pumps (AREA)

Abstract

PURPOSE: To simplify the measurement with high accuracy, by using a dynamic thermodynamic measuring method and computing and displaying the delivery pressure signal and temperature difference signal in real time.
CONSTITUTION: A hydraulic pump 1 is provided with temperature sensors 2, 3 detecting temperatures t1, t0 at delivery and suction sides, and a pressure sensor 4 detecting the pressure Δp at the delivery. The temperature sensors 2, 3 are connected to the temperature difference amplifier 6 incorporated in a total efficiency measuring device 5, and the pressure sensor 4 is connected to the AD converter via a pressure amplifier 7. The signal from the sensors 2, 3 is converted into Δt=t1- t0 at the temperature difference amplifier to obtain a voltage ΔT proportional to the temperature difference Δt. The values ΔT, ΔP are input to a microcomputer 9 via the AD converter 8, the total efficiency ηD is momentarily calculated, and the ηD, pressure ΔPD, and temperature difference ΔTD are displyed on a cathode-ray tube display 11 as a continuous graph.
COPYRIGHT: (C)1981,JPO&Japio
JP14200179A 1979-11-05 1979-11-05 Measurement device of total efficiency for hydraulic pump or motor Pending JPS5666721A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14200179A JPS5666721A (en) 1979-11-05 1979-11-05 Measurement device of total efficiency for hydraulic pump or motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14200179A JPS5666721A (en) 1979-11-05 1979-11-05 Measurement device of total efficiency for hydraulic pump or motor

Publications (1)

Publication Number Publication Date
JPS5666721A true JPS5666721A (en) 1981-06-05

Family

ID=15305071

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14200179A Pending JPS5666721A (en) 1979-11-05 1979-11-05 Measurement device of total efficiency for hydraulic pump or motor

Country Status (1)

Country Link
JP (1) JPS5666721A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS499701A (en) * 1972-05-27 1974-01-28

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS499701A (en) * 1972-05-27 1974-01-28

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