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Device and process for monitoring cavitation in a positive displacement pump

  • US 4,512,722 A
  • Filed: 10/18/1983
  • Issued: 04/23/1985
  • Est. Priority Date: 10/28/1982
  • Status: Expired due to Term
First Claim
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1. A device for monitoring cavitation parameters of a positive displacement pump in a fluid system comprising:

  • (a) supply means to apply fluid to the positive displacement pump via a feeder line at a first pressure (P1);

    (b) a venturi;

    (c) flow generating means for generating a flow of fluid proportional to the flow of the positive displacement pump, the flow generating means having an inlet connected to the feeder line and an outlet connected to the venturi inlet to supply fluid thereto at a second pressure (P2), the capacity of the flow generating means the throat cross-section of the venturi being such that cavitation occurs in the venturi throat prior to cavitation occurring in the positive displacement pump; and

    ,(d) detecting means to detect the difference between the first (P1) and second (P2) pressures and to generate a signal when the difference between P1 and P2 reaches or exceeds a predetermined limit.

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