A collaborative testing system for internal and external characteristics of pump self-priming process

Abstract

The invention relates to a pump self-priming process internal and external characteristic cooperation test system. The system comprises a water tank and a self-primping centrifugal pump, an outlet pipe and an inlet pipe of the self-primping centrifugal pump are connected with the water tank, and the outlet pipe of the self-primping centrifugal pump is provided with a first gate valve, an electromagnetic flowmeter and an outlet pressure sensor; the inlet pipe of the self-primping centrifugal pump is successively provided with a second gate valve, a Coriolis mass flowmeter and an inlet pressure sensor, the self-primping centrifugal pump is connected with a motor, the motor is provided with a shaft encoder, a high-speed camera and an LED light source are arranged beside the self-primping centrifugal pump, and the high-speed camera is successively connected with a signal gatherer and a computer; and the Coriolis mass flowmeter, the inlet pressure sensor, the outlet pressure sensor and the shaft encoder are respectively connected with the computer through an NI virtual instrument. According to the invention, when external characteristics of a pump such as waterpower performance, self-priming performance and the like are measured, internal flow characteristics such as gas-liquid suction, gas-liquid mixing, gas-liquid separation, gas discharge and water backflow and the like in a self-priming process are observed through the high-speed photography system.

Description

technical field [0001] The invention belongs to the field of fluid machinery experiments, and specifically relates to a collaborative testing system for internal and external characteristics of a pump self-priming process, which is mainly used for simultaneously measuring the external characteristics of pump self-priming performance and the internal characteristics of gas-liquid two-phase flow. Background technique [0002] The self-priming pump is a special centrifugal pump that only needs to be filled with water when it is started for the first time, and the air in the pipeline and the pump body can be discharged every time it is started, and then the water can be delivered normally. It is a key component of light and small irrigation units, and is widely used in rural mobile irrigation, mobile work, frequent start-up and difficult irrigation. In addition to hydraulic performance parameters such as flow rate, head, and efficiency, self-priming pumps also have parameters su...

AI Technical Summary

Problems solved by technology

However, this test bench is only suitable for testing the external characteristics of the self-priming pump self-priming performance. When performing the test and analysis of the internal flow field of the self-priming pump self-priming process, it is necessary to rebuild the test bench, which increases the time cost and economic cost, and reduces the use efficiency.

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