Asynchronous motor-constant power plunger variable pump loss power test system and method

Abstract

The invention provides an asynchronous motor-constant power plunger variable pump loss power test system and method. The asynchronous motor-constant power plunger variable pump loss power test systemis characterized in that the test system comprises a two-position three-way magnetic exchange valve and a pilot proportional overflow valve, an asynchronous motor is connected with a constant power plunger variable pump, an oil inlet of the constant power plunger variable pump communicates with an oil tank, and an oil outlet of the constant power plunger variable pump is connected with a port A orthe two-position three-way magnetic exchange valve; a port T of the two-position three-way magnetic exchange valve is connected with the oil tank, a port B of the two-position three-way magnetic exchange valve is connected with an inlet of the pilot proportional overflow valve, and an outlet of the pilot proportional overflow valve is connected with the oil tank; and the pilot proportional overflow valve is used for setting the output pressure of the test system. The asynchronous motor-constant power plunger variable pump loss power test system and method are based on the motor and pump lossmechanism study, a more reliable and accurate characteristic curve of the rotation speed n and the total loss power Pw of the asynchronous motor and the constant power plunger variable pump can be obtained only three rotation speed experiments needs to be carried out instead of traditional simple curve fitting, the testing efficiency is improved, and the testing cost is reduced.

Description

technical field [0001] The invention relates to a test system and a test method, in particular to an asynchronous motor-constant power plunger variable pump loss power test system and method. Background technique [0002] In industrial production, the hydraulic system with the motor-piston pump as the power source has a considerable power loss in energy transmission, so there is a large space for energy saving. Improving the energy utilization efficiency of the hydraulic system is crucial to alleviating energy shortages and reducing the greenhouse effect. is of great significance. The efficiency of the hydraulic system composed of motor and pump is not only affected by the structure, manufacturing quality and system working conditions of its own motor and plunger pump, but also largely depends on the adjustment characteristics of the specific variable mechanism. The efficiency of the motor and the plunger pump are tested under their respective rated working conditions. In t...

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Problems solved by technology

[0007] The object of the present invention is to provide a kind of asynchronous motor-constant power plunger variable pump loss power testing system and method, apply the loss mechanism research result of motor and pump, overcome the work of motor-constant power plunger variable pump performance test process The shortcomings of large quantity and poor reliability simplify the test process and ensure the accuracy of test results

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