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A volume electric loading hydraulic pump test device

A test device, hydraulic pump technology, applied in pump testing, liquid variable capacity machinery, machine/engine, etc., can solve the problems of difficult loading control, complex mechanical structure, difficult installation, etc., to reduce the installed capacity and adapt to the scope. Large, easy-to-operate effect

Active Publication Date: 2016-05-04
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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  • Abstract
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Problems solved by technology

The first method is to load the throttle valve or relief valve, which changes the load of the hydraulic pump by changing the opening of the throttle valve or the loading pressure of the relief valve. Although this method has a simple structure, all the energy output by the hydraulic pump passes through The throttling valve or overflow valve is converted into heat energy, resulting in serious energy loss and heating of the system, and sometimes a cooling device of a corresponding scale has to be added
The second method is to use a hydraulic pump-hydraulic motor test system based on hydraulic feedback. Although this method is energy-saving, the mechanical or hydraulic coupling between the tested pump and the loaded hydraulic motor is either complicated in mechanical structure, difficult to install, or difficult to control the load. Big

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  • A volume electric loading hydraulic pump test device

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Embodiment Construction

[0017] The detailed description and technical content of the present invention are described below with the accompanying drawings, but the accompanying drawings are only provided for reference and description, and are not intended to limit the present invention.

[0018] Refer to attached figure 1 According to the function, it can be divided into five parts: the tested hydraulic pump and its driving part, hydraulic pump-motor part, motor loading part, frequency conversion motor and AC dynamometer electric drive and control part, computer measurement and control device.

[0019] The pump under test and its driving part include the variable frequency motor 2 for driving the pump under test, the inverter device 3 for the variable frequency motor for driving the pump under test, the first torque speed sensor 4 , and the hydraulic pump 6 under test. This part provides mechanical energy for the tested hydraulic pump. The rotational speed of the tested hydraulic pump 6 is precisely c...

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Abstract

The invention discloses a capacity electricity loaded hydraulic pump testing device which comprises a tested hydraulic pump, a hydraulic motor for loading and a computer measurement and control device, wherein the tested hydraulic pump is directly connected with the hydraulic motor for loading and is connected to a switching rectification device of an alternating current network through a frequency conversion motor for dragging the tested pump and an inversion device of the frequency conversion motor for dragging the tested pump in sequence; the hydraulic motor for loading is connected to the switching rectification device of the alternating current network through an alternating current dynamometer and an inversion device of the alternating current dynamometer in sequence; the computer measurement and control device is connected with the tested hydraulic pump, the hydraulic motor for loading, the inversion device of the frequency conversion motor for dragging the tested pump and the inversion device of the alternating current dynamometer respectively. The capacity electricity loaded hydraulic pump testing device has an energy-saving effect, and can realize loading of the tested pump. The device is simple in structure, flexible in configuration and convenient to operate, and the rotating speed and pressure of the tested hydraulic pump are independently controlled.

Description

technical field [0001] The invention relates to hydraulic pump test and automatic device technology, in particular to a hydraulic pump test device for volumetric electric loading. Background technique [0002] In the hydraulic pump performance test system, the hydraulic pump needs to be loaded. In the prior art, there are mainly two methods for loading the hydraulic pump. The first method is to load the throttle valve or relief valve, which changes the load of the hydraulic pump by changing the opening of the throttle valve or the loading pressure of the relief valve. Although this method has a simple structure, all the energy output by the hydraulic pump passes through The throttling valve or relief valve is converted into heat energy, resulting in serious energy loss and heating of the system, and sometimes a cooling device of a corresponding scale has to be added. The second method is to use a hydraulic pump-hydraulic motor test system based on hydraulic feedback. Altho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B51/00
Inventor 王向周张义华张东韩斌王长江高公如郑戍华
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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