Variable displacement pump test bench and its test method

Abstract

The invention discloses a test bench for a variable displacement pump. The test bench comprises an oil tank and a workbench used for accommodating an to-be-tested variable displacement pump with an electromagnetic valve, and further comprises a control box used for controlling whole-process variability of the to-be-tested variable displacement pump, a data acquisition processing module and a data display module, wherein an oil outlet of the oil tank is communicated with an oil suction port of the to-be-tested variable displacement pump; an oil outlet of the to-be-tested variable displacement pump is communicated with an oil return port of the oil tank through an oil exit pipe; a pressure sensor and a temperature sensor are connected on the oil exit pipe; a rotation speed sensor is mounted on a main shaft driving the to-be-tested variable displacement pump to rotate; the pressure sensor, the temperature sensor and the rotation speed sensor are electrically connected with the control box; the control box is electrically connected with the data acquisition processing module; and the data acquisition processing module is electrically connected with the data display module. According to the test bench, after the abovementioned structure is adopted, the entire bench is simple in structure, sensitive in operation and high in accuracy, the test efficiency is greatly improved, and thus the economic benefits of enterprises are improved.

Description

technical field [0001] The invention relates to the technical field of pump performance detection, in particular to a variable displacement pump test bench and a test method thereof. Background technique [0002] The role of the oil pump is to provide reliable lubrication to key parts such as the engine and gearbox of the car. The oil pump is generally composed of a housing, an inner rotor, an outer rotor and a pump cover. Before the oil pump leaves the factory, a bench test for performance testing is generally carried out to ensure the qualified products of the factory. Bench test means that before the product leaves the factory, it generally needs to carry out some simulated bench tests, including some engine tests, before it can be put into use. Generally, when performing the performance test of the oil pump, it is necessary to test the curve of the relationship between the oil pump outlet pressure and the flow rate of the oil pump at different specified oil temperature...

AI Technical Summary

Problems solved by technology

However, the disadvantages of this test bench are:

[0004] 1) Although it enables the oil pump to simulate the actual working environment and working conditions, and can intuitively reflect the effect of the performance of the oil pump, but this test bench has many pipelines, the mechanism is enlarged, and it takes up a large space;

[0005] 2) In addition, because the test method uses lubricating oil as the test medium, the test process is slow, time-consuming, and inefficient. For professional manufacturers of mass-produced oil pumps, low efficiency has become a fatal factor, thereby affecting the enterprise. economic benefits

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