Hydraulic speed regulation power closed test system

Abstract

The invention discloses a hydraulic speed regulation power closed test system which comprises an accompanying hydraulic motor, a tested hydraulic pump in transmission fit with the accompanying hydraulic motor, and a loading assembly arranged on a transmission path of the accompanying hydraulic motor and the tested hydraulic pump. The liquid inlet end of the accompanying hydraulic motor communicates with the liquid outlet end of the tested hydraulic motor; and the liquid outlet end of the accompanying hydraulic motor communicates with the liquid inlet end of the tested hydraulic motor to form aclosed hydraulic circuit. According to the test system, the closed hydraulic circuit is formed, the accompanying hydraulic motor drives the tested hydraulic pump through a transmission shaft, meanwhile, the tested hydraulic pump feeds back energy to the accompanying hydraulic motor through output oil, the closed hydraulic cycle is formed by the structure, the energy consumption of the system is effectively reduced, and compared with a traditional conventional hydraulic pump / motor test bench adopting a back pressure loading mode, the energy can be saved by about 70% at most, and the test system is simple in structure and easy to adjust and control.

Description

technical field [0001] The invention relates to the field of hydraulic technology, and relates to a closed test system for hydraulic speed regulation power. Background technique [0002] The hydraulic pump / motor test bench is designed and manufactured according to the standard of hydraulic pump factory test, which can test the dynamic and static performance of hydraulic vane pump (single pump, double pump, multiple pump), gear pump and plunger pump. [0003] The conventional hydraulic pump / motor test bench adopts the back pressure loading method, which consumes a lot of energy and the oil temperature rises too fast, so it is not suitable for continuous test and fatigue life test. [0004] At present, a closed-power hydraulic pump / motor test bench is proposed, which adopts the method of power return feedback; the current closed-power hydraulic pump / motor test bench adopts the scheme of frequency conversion motor combined with gearbox speed regulation and constant pressure pum...

AI Technical Summary

Problems solved by technology

Due to the gear box speed ratio and volume limitations, the speed range of this scheme is generally low (≤3000r / min) and it is inconvenient to adjust the speed in a large range. It can only meet the test requirements of ordinary hydraulic pumps / motors, but cannot meet the high speed (≥10000r / min) / min) hydraulic pump / motor test conditions

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