WO1988008524A1 - Appareil de controle automatique pour dispositifs hydrauliques - Google Patents

Appareil de controle automatique pour dispositifs hydrauliques Download PDF

Info

Publication number
WO1988008524A1
WO1988008524A1 PCT/US1988/000951 US8800951W WO8808524A1 WO 1988008524 A1 WO1988008524 A1 WO 1988008524A1 US 8800951 W US8800951 W US 8800951W WO 8808524 A1 WO8808524 A1 WO 8808524A1
Authority
WO
WIPO (PCT)
Prior art keywords
unit
testing
inlet
fluid
microprocessor
Prior art date
Application number
PCT/US1988/000951
Other languages
English (en)
Inventor
Melvin Schecker
Robert J. Williams
Original Assignee
Grumman Aerospace Corporation
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 Grumman Aerospace Corporation filed Critical Grumman Aerospace Corporation
Publication of WO1988008524A1 publication Critical patent/WO1988008524A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors

Definitions

  • the present invention is related to automatic test equipment (ATE) , and more particularly to such automated equipment for testing hydraulic devices.
  • ATE automatic test equipment
  • the present invention is directed to automatic test equipment for hydraulic devices that lends a degree of universality to a wide variety of hydraulic devices.
  • FIG. 1 is a basic block diagram of the present invention
  • FIG. 2 is a basic block diagram of a hydraulic power unit as employed in the present invention
  • FIG. 3 is a block diagram of a test panel as employed in the present invention.
  • FIG. 1 a basic block diagram of the present invention is illustrated.
  • a hydraulic device to undergo test is indicated by reference numeral 10 in FIG. 1.
  • a fluid control test panel 12 is connected to the unit under test 10 by means of supply and return lines 15.
  • Pressurized and cooled fluid is provided to the test panel 12 by hydraulic power unit 14, the panel 12 and power unit 14 being interconnected by supply and return lines 16.
  • a microprocessor 18 provides control signals along line 20 to the hydraulic power unit 14 so that a pump within the power unit can produce predetermined flow and pressures for the test panel 12.
  • the microprocessor 18 also includes a bidirectional connection line 22 with the test panel 12 so that predetermined electrical control signals can be provided to the test panel 12, which in turn will drive a hydraulic unit undergoing test. Transducers are included within the test panel 12 so that physical measurements including displacement, velocity, force, etc., may be made of the hydraulic device parts while it undergoes testing.
  • the program for the microprocessor 18 includes the necessary signals for producing fluid and electrical parameters in accordance with the various hydraulic devices that will be tested. Once given the specifications for a particular hydraulic device, it is straightforward to write a particular program but the program is not part of the present invention, per se.
  • FIG. 2 is a block diagram of the hydraulic power unit 14.
  • the heart of the hydraulic power unit is pump 24, which generates a desired pressure in accordance with a corresponding command along electrical line 30 coming from the microprocessor 18.
  • a reservoir 26 normally stores hydraulic fluid and supplies it to pump 24 along hydraulic line 28.
  • the pressurized fluid 32 is filtered at filter 34 and is provided to the test panel from outlet port 36.
  • a return fluid path to the power unit 14 is provided at inlet port 38.
  • a cooler 40 is provided downstream from the inlet port 38 to cool the returned hydraulic fluid; and thereafter, the hydraulic fluid is passed along line 42 to a filter 44, where particulate matter may be removed before re-introduction along line 46 to reservoir 26.
  • Conventional pressure regulators 47 are connected between the high and low pressure lines of the power unit so as to prevent the pump 24 from supplying an excessively high pressurized hydraulic fluid to the test panel 12.
  • the test panel 12 is indicated in greater detail in FIG. 3.
  • a selectively connected unit undergoing test 10 is connected via supply line 54 to solenoid valves 52.
  • the valves 52 control the high pressure and fluid flow provided the test panel along inlet line 48.
  • a flow meter 50 monitors the supply fluid.
  • the unit undergoing test returns the hydraulic fluid to the solenoid valves 52 along return line 56.
  • the unit undergoing test 10 may be an aircraft control surface servo actuator.
  • the unit undergoing test 10 may be an aircraft control surface servo actuator.
  • a low pressure motor valve 64 may be provided between the high and low pressure lines in the test panel so that variably adjustable low pressure fluid may be - provided to the solenoid valves 52, which in turn provide the low pressure fluid to a unit undergoing test. This would allow the device to be tested for leakage under low pressure conditions.
  • Transducers 58 include pressure readout devices to indicate the correlation between inlet and outlet pressures for the device. Also, once the device is mechanically unlocked, measurements may be made of displacement, velocity and force parameters by the transducers 58.
  • the analog transducer outputs are provided to appropriate electronic instruments 60, which generate digital measurement signals along output line 62 to the microprocessor.
  • the measurements and response to microprocessor-controlled fluid parameters at the unit undergoing test determine whether the unit successfully completes its test.
  • the test panel 12 includes a flow cycling or reversing valve means 68 of conventional design to reverse the flow between inlet and outlet ports of the test panel when simple hydraulic devices, such as a cylinder, are to be so tested. Further, a relief valve or bypass 66 is connected between the high and low pressure ports so as to prevent the development of excessively high damaging pressures in the test panel 12.
  • the microprocessor When hydraulic devices which are electrically controlled are to be tested, the microprocessor generates appropriate electrical commands, along line 70, which are converted by a conventional signal generator 72 to appropriate analog voltages. These voltages are input to the unit undergoing test 10 along line 74.
  • the present invention makes it possible to test a number of different types of hydraulic units with a single test set-up which will furnish accurate and reliable measurements.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

Plusieurs unités hydrauliques (10) peuvent être contrôlées à l'aide d'un seul appareil. Un microprocesseur (19) transmet à une pompe (24) des signaux de commande de pressurisation de fluide hydraulique et de variation de débit à des niveaux fixés à l'avance. Un panneau (12) de contrôle de régulation de fluide comporte une vanne magnétique (52) faisant passer le fluide sous pression par l'orifice d'entrée, puis par l'orifice de sortie de l'unité à tester, pour détecter les fuites. Des transducteurs (58) détectent les paramètres des mouvements mécaniques tandis que les pièces de l'unité testée subissent des déplacements d'ampleur contrôlée. Des signaux électriques de sortie émanant des transducteurs commandent des instruments de mesure (60), et les mesures résultantes sont stockées dans le microprocesseur (18).
PCT/US1988/000951 1987-04-24 1988-03-28 Appareil de controle automatique pour dispositifs hydrauliques WO1988008524A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US4219987A 1987-04-24 1987-04-24
US042,199 1987-04-24

Publications (1)

Publication Number Publication Date
WO1988008524A1 true WO1988008524A1 (fr) 1988-11-03

Family

ID=21920592

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1988/000951 WO1988008524A1 (fr) 1987-04-24 1988-03-28 Appareil de controle automatique pour dispositifs hydrauliques

Country Status (2)

Country Link
IL (1) IL86036A0 (fr)
WO (1) WO1988008524A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2224318A (en) * 1988-10-07 1990-05-02 Westinghouse Electric Corp Testing hydraulic fluid systems
US5571082A (en) * 1993-08-02 1996-11-05 Bashikirov; Alexei B. Method of producing therapeutic effect upon an organism to reduce the pathologic lymphocyte population
WO1997005395A1 (fr) * 1995-07-26 1997-02-13 Automotive Products (Usa) Inc. Procede permettant de tester un dispositif hydraulique et appareil correspondant
WO1997049923A1 (fr) * 1996-06-26 1997-12-31 Project Fire Engineers Limited Verification de systemes hydrauliques
NL1004028C2 (nl) * 1996-09-13 1998-03-16 Sun Electric Systems Bv Werkwijze voor het bepalen van de hoeveelheid onopgelost gas in een hydraulisch systeem.
CN101813109A (zh) * 2010-04-02 2010-08-25 山东电力研究院 伺服阀测试系统
EP2930365A1 (fr) * 2014-03-27 2015-10-14 Hidropar Izmir Hidrolik Elektronik Makine Aksami Donanimlari Pazarlama Sanayii ve Ticaret Anonim Sirketi Système de test de pompe avec récupération d'énergie

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4055801A (en) * 1970-08-18 1977-10-25 Pike Harold L Automatic electronic test equipment and method
US4181016A (en) * 1977-07-11 1980-01-01 Sun Electric Corporation Process and apparatus for testing hydraulic control systems
US4480464A (en) * 1983-02-28 1984-11-06 Hr Textron Inc. General purpose hydraulic test station
US4674030A (en) * 1984-01-24 1987-06-16 Bijur Lubricating Corp. Lubricating system control circuit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4055801A (en) * 1970-08-18 1977-10-25 Pike Harold L Automatic electronic test equipment and method
US4181016A (en) * 1977-07-11 1980-01-01 Sun Electric Corporation Process and apparatus for testing hydraulic control systems
US4480464A (en) * 1983-02-28 1984-11-06 Hr Textron Inc. General purpose hydraulic test station
US4674030A (en) * 1984-01-24 1987-06-16 Bijur Lubricating Corp. Lubricating system control circuit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SAE TECHNICAL PAPER SERIES, issued 14-17 October 1985, (Warrendale, Pennsylvania), T. HESSEL, "Mechanical Interface Device for Automatic Test Equipment", see pages 1-6. *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2224318A (en) * 1988-10-07 1990-05-02 Westinghouse Electric Corp Testing hydraulic fluid systems
US5571082A (en) * 1993-08-02 1996-11-05 Bashikirov; Alexei B. Method of producing therapeutic effect upon an organism to reduce the pathologic lymphocyte population
WO1997005395A1 (fr) * 1995-07-26 1997-02-13 Automotive Products (Usa) Inc. Procede permettant de tester un dispositif hydraulique et appareil correspondant
GB2307952A (en) * 1995-07-26 1997-06-11 Automotive Prod Co Ltd Method and apparatus for testing a fluid pressure apparatus
GB2307952B (en) * 1995-07-26 1999-10-13 Automotive Prod Co Ltd Method and apparatus for testing a fluid pressure apparatus
AU716999B2 (en) * 1996-06-26 2000-03-16 Project Fire Global Holdings Limited Testing of fluid systems
WO1997049923A1 (fr) * 1996-06-26 1997-12-31 Project Fire Engineers Limited Verification de systemes hydrauliques
US6314792B1 (en) * 1996-06-26 2001-11-13 Project Fire Engineers Limited Testing of fluid systems
EP0829648A1 (fr) * 1996-09-13 1998-03-18 Sun Electric Systems B.V. Méthode et appareil pour déterminer la quantité de gaz non-dissou dans un système hydraulique
US6081767A (en) * 1996-09-13 2000-06-27 Sun Electric Systems B.V. Method and device for determining the amount of undissolved gas in a hydraulic system
NL1004028C2 (nl) * 1996-09-13 1998-03-16 Sun Electric Systems Bv Werkwijze voor het bepalen van de hoeveelheid onopgelost gas in een hydraulisch systeem.
CN101813109A (zh) * 2010-04-02 2010-08-25 山东电力研究院 伺服阀测试系统
CN101813109B (zh) * 2010-04-02 2012-03-21 山东电力研究院 伺服阀测试系统
EP2930365A1 (fr) * 2014-03-27 2015-10-14 Hidropar Izmir Hidrolik Elektronik Makine Aksami Donanimlari Pazarlama Sanayii ve Ticaret Anonim Sirketi Système de test de pompe avec récupération d'énergie

Also Published As

Publication number Publication date
IL86036A0 (en) 1988-09-30

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