A parallel test device and method for testing the 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. One test can simultaneously perform durability tests on multiple hydraulic pumps and multiple electromagnetic reversing valves with multiple specifications. The arrangement of diverter valves in parallel increases the number of test samples compared with the test bench of ordinary hydraulic components, which not only increases the number of test samples, but also increases the types of test samples and improves the test efficiency; each tested pump in the present invention is driven by a variable frequency motor to rotate , the rotational speed of the axial piston pump under test is increased through frequency conversion technology, and at the same time, the electromagnetic overflow valve is loaded to make the system pressure higher than the rated pressure of the pump and the valve under test, so that the accelerated test method can be used to advance the test progress , thereby shortening the product development cycle; the multi-standard hydraulic pump and multi-standard valve durability test parameters of the present invention are monitored in real time by sensors, which can make accurate judgments on the current state of the tested components.

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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