Parallel test device and method for testing reliability of hydraulic pumps and hydraulic reversing valves

Abstract

The invention discloses a parallel test device and method for testing the reliability of hydraulic pumps and hydraulic reversing valves. By means of the parallel test device and method for testing thereliability of the hydraulic pumps and the hydraulic reversing valves, durability testing of a plurality of hydraulic pumps and a plurality of multi-specification electromagnetic reversing valves canbe performed at the same time through one-time testing, the tested valves adopt flow dividing valve parallel-connection arrangement to increase test samples, compared with a test bed of common hydraulic elements, the number of the test samples is increased, the types of the test samples are also increased, and the test efficiency is improved; all the tested pumps are driven by a variable frequency motor to rotate, the rotating speed of tested axial plunger pumps is increased through the variable frequency technology, meanwhile, loading is performed through electromagnetic overflow valves, thesystem pressure can be higher than the rated pressure of the tested pumps and the tested valves, and the test progress is conveniently promoted by adopting an acceleration test method, so that the product development period is shortened; and the durability test parameters of the multi-specification hydraulic pumps and the multi-specification valves are both monitored in real time by using sensors, and the current states of tested elements can be accurately judged.

Description

technical field [0001] The invention relates to the technical field of component measurement of a hydraulic system, in particular to a parallel test device and method for testing the reliability of a hydraulic pump and a hydraulic reversing valve. Background technique [0002] Valves and pumps are the key components of the hydraulic system, and their performance directly affects the reliability of the hydraulic system, so the performance test is particularly critical. Therefore, it is very important to build a hydraulic pump test bench with good performance and high reliability. Because the traditional test bench does not use multiple types of components in parallel as a hydraulic test system, the hydraulic test circuit has no power recovery and energy-saving technology, it has the disadvantages of long time consumption, low test efficiency, and high energy consumption when there are many test components. Patent CN103511397B A shaft In the plunger pump and motor reliability...

AI Technical Summary

Problems solved by technology

Because the traditional test bench does not use multiple types of components in parallel as a hydraulic test system, the hydraulic test circuit has no power recovery and energy-saving technology, it has the disadvantages of long time consumption, low test efficiency, and high energy consumption when there are many test components. Patent CN103511397B A shaft In the plunger pump and motor reliability test method, the hydraulic pump and hydraulic motor are both used as the tested objects; during the test, several pressure, temperature sensors and flowmeters installed on the corresponding pipelines of the tested pump and the motor, and The torque tachometer installed at the input shaft of the tested axial piston pump collects relevant data, and calculates the reliability parameters of the axial piston pump and motor according to the collected data and related calculation formulas

Although this design can realize parallel experiments of pumps and motors with matching power, compared with the design in this paper, the specifications and types of components for a single test are still less, and there is no extended function

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