Gas-liquid two-phase flow performance testing system and method for centrifugal pump

Abstract

The invention discloses a gas-liquid two-phase flow performance testing system and method for a centrifugal pump. The system is mainly composed of a liquid storage tank, an inlet pipeline, a gas inlet pipe branch, a variable frequency pump unit and an outlet pipeline. An inlet in the middle of the liquid storage tank is connected with the outlet end of the variable frequency pump unit through the outlet pipeline, the inlet end of the variable frequency pump unit is connected to an outlet in the bottom of the liquid storage tank through the inlet pipeline, and the inlet pipeline is further connected with the gas inlet pipe branch. By collecting signals of a pressure sensor and a torque meter of the variable frequency pump unit, lift and efficiency curves under gas-liquid two-phase flow with different gas contents are obtained. By analyzing signals of a vibration acceleration sensor, a flow quantity vibration curve is obtained. By collecting inlet pressure and the signals of the pressure sensor, cavitating performance curves of the centrifugal pump under the gas-liquid two-phase flow with different gas contents are obtained. A closed circulation loop is formed, and gas-liquid two-phase flow performance testing, vibration testing, cavitating performance testing and the like of the centrifugal pump can be realized. The system is simple in structure, high in testing efficiency and high in testing accuracy.

Description

technical field [0001] The invention relates to the field of pump performance testing, in particular to a centrifugal pump gas-liquid two-phase flow performance testing system and a testing method thereof. Background technique [0002] Gas-liquid two-phase flow exists widely in various fluid transmission fields, especially in oil and gas, medical and chemical industries, and the centrifugal pump, which is the core of fluid transmission technology, has become a research hotspot. [0003] As the main equipment for conveying fluid, the centrifugal pump belongs to the vane pump, which has the characteristics of high lift and high efficiency. Centrifugal pumps, however, typically deliver single-phase fluids. Under the gas-liquid two-phase flow, the performance of the centrifugal pump will change significantly. [0004] At present, there are few researches on the performance test of centrifugal pump gas-liquid two-phase flow in China. There are two reasons: one is that it is dif...

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Problems solved by technology

[0004] At present, there are few researches on the performance test of centrifugal pump gas-liquid two-phase flow in China. There are two reasons: one is that it is difficult to establish a test system for simulating gas-liquid two-phase flow in the test; Sometimes the flow channel will be blocked, causing the centrifugal pump to fail to work.

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