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Circulating water pressure control device of hydraulic dynamometer used for test bed

A hydraulic dynamometer and pressure control technology, applied in the field of detection, can solve problems such as affecting the measurement accuracy of engine power, torque and rotational speed, poor stability of the circulating water supply pressure of the hydraulic dynamometer, and excessive pressure fluctuations.

Active Publication Date: 2010-02-17
CHINA HANGFA SOUTH IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to provide a circulating water pressure control device for a hydraulic dynamometer used in a test vehicle, which can solve the problem of affecting the engine power due to the low control precision of the electric regulating valve and the pressure fluctuation exceeding the requirements of the dynamometer in the prior art. , torque and rotational speed measurement accuracy, which leads to the problem of poor stability of the circulating water supply pressure of the hydraulic dynamometer

Method used

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  • Circulating water pressure control device of hydraulic dynamometer used for test bed

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Embodiment Construction

[0013] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0014] figure 1 It shows a schematic diagram of a hydraulic dynamometer circulating water pressure control device for a test bench according to an embodiment of the present invention, including: a pipeline 4 and a frequency converter 1, a submerged pump motor, and a submerged pump 2 sequentially connected thereto , safety pressure relief valve 3, filter 5, surge tank 6, pressure transmitter 7, circulating water inlet switch 8, dynamometer 9, circulating water drainage switch and drain valve 10 on the dynamometer body, wherein

[0015] The frequency converter 1 is used to compare the pressure value detected by the pressure transmitter 7 with the set standard value, and adjust the speed of the submerged pump through the submerged pump motor to change its output water flow according to the comparison result;

[0016] The drain valve is...

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Abstract

The invention discloses a circulating water pressure control device of a hydraulic dynamometer used for a test bed, comprising a pipeline, a frequency converter, a submerged pump motor, a submerged pump, a safety relief valve, a filter, a pressure stabilizing pot, a pressure transmitter, a circulating water inlet switch, a dynamometer and a circulating water drain switch which are connected on thepipeline in sequence, as well as a drain valve arranged on a dynamometer body, wherein the frequency converter is used for comparing the pressure value detected by the pressure transmitter with the set standard value and adjusting the rotation speed of the submerged pump by the submerged pump motor according to the comparison result to change the output water flow; and the drain valve is used forcorrespondingly increasing or reducing the opening degree according to the power change of a tested engine.

Description

technical field [0001] The invention relates to the detection field, in particular to a circulating water pressure control device for a hydraulic dynamometer used in a test vehicle. Background technique [0002] A certain type of engine test bench is a high-speed hydraulic dynamometer. The hydraulic dynamometer requires that the circulating water inlet pressure is 0.35MPa±0.018MPa, and the water supply pressure fluctuation is less than 0.007MPa. The existing solution is to use an electric regulating valve to divert the flow in the pipeline through a bypass pipe so as to control the pressure. [0003] In the process of realizing the present invention, the inventor found that due to the low control precision of the electric regulating valve in the prior art, the pressure fluctuation exceeded the requirements of the dynamometer, which affected the measurement accuracy of engine power, torque and rotational speed, and caused the hydraulic dynamometer Circulating water supply pr...

Claims

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Application Information

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IPC IPC(8): G01M15/02G01L3/24G05D16/20G05D16/14
Inventor 彭彤陈建国
Owner CHINA HANGFA SOUTH IND CO LTD