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Method and means for testing hydraulic pump

  • US 3,942,375 A
  • Filed: 10/11/1974
  • Issued: 03/09/1976
  • Est. Priority Date: 10/11/1974
  • Status: Expired due to Term
First Claim
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1. A device for testing a hydraulic pump having a charging inlet, a discharge outlet, and a rotor shaft, said device comprising:

  • a dynamometer comprising a drive shaft, a dynamometer pump, and means connecting said drive shaft to said dynamometer pump for driving said dynamometer pump, said dynamometer pump being hydraulically connected in a hydraulic circuit for pumping hydraulic fluid through said circuit in response to rotation of said drive shaft;

    a tachometer connected to said drive shaft for measuring the rotational speed thereof;

    a first conduit connected to said hydraulic circuit of said dynamometer, said first conduit having first coupling means thereon for coupling said conduit to said charging inlet of said test pump;

    a second conduit connected to said dynamometer hydraulic circuit for returning fluid to said dynamometer circuit, said second conduit having a second coupling means for connecting said second conduit to said discharge end of said test pump;

    a flow rater connected to said second conduit and having gauges for registering the rate of flow of fluid in said second conduit; and

    mechanism connected to said drive shaft of said dynamometer and having means adapted to be connected to said rotor shaft of said test pump for driving said test pump in response to rotation of said drive shaft of said dynamometer.

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