Torque loading system of hydraulic pump
A technology of torque loading and hydraulic pumps, which is applied in the testing of measuring devices, instruments, machines/structural components, etc. It can solve problems such as the inability to load zero-speed rotating mechanisms and limit the application range of hydraulic pump loading, and achieve the goal of increasing the torque loading range. Effect
Inactive Publication Date: 2011-01-19
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
[0007] It can be seen that the existing hydraulic pump torque loading scheme cannot load the zero-speed rotating mechanism, and cannot provide stable loading torque for the low-speed rotating mechanism, which greatly limits the application range of hydraulic pump loading
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[0019] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0020] The invention provides a hydraulic pump torque loading system, the basic idea of which is to provide an additional control oil source for the proportional overflow valve at the outlet of the hydraulic pump. There is a minimum stable flow rate in the pressure flow characteristics of the proportional relief valve, and the size of the minimum stable flow rate varies with the model, specification and performance quality of the proportional relief valve, as long as the additional control oil source provided is greater than that of the proportional relief valve The minimum stable flow rate can make the proportional relief valve in better working characteristics. Since the control oil with a flow rate greater than the minimum stable flow always passes through the proportional relief valve, the proportional relief valve can be loaded with upper press...
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The invention discloses a torque loading system of a hydraulic pump. The system provides a control oil source additionally for a proportion overflowing valve at an outlet of the hydraulic pump; as being passed by oil all the time, the proportion overflowing valve can be in better working characteristics, and can carry out torque loading for the hydraulic pump with low rotating speed, even zero rotating speed. Simultaneously, the torque loading system uses the electronic elements of a potentiometer, an electronic switch, a button and the like to form a torque loading control module, adjusts the loaded torque by adjusting external control signals or the potentiometer, and realizes impact loading and impact unloading of the torque by the button, thus leading the loading system to have the functions of impact loading, impact unloading and continuous loading and the like. Besides, the pressure valve of the provided control oil is equal to the highest working pressure of the proportion overflowing valve so as to guarantee that the control oil can enter the proportion overflowing valve by a one-way valve under any condition and increase the range of loading the torque of the torque loading system.
Description
technical field [0001] The invention relates to the technical field of hydraulic loading and automation devices, in particular to a hydraulic pump torque loading system capable of torque loading for zero-speed and low-speed rotating mechanisms. Background technique [0002] Mechanisms for rotating motion include various forms of motors, hydraulic motors, and swing cylinders. In experimental research, it is often necessary to analyze their ability to drive loads and their motion performance under load, so it is necessary to simulate loads that conform to actual working conditions. At present, the commonly used torque loading methods in rotary motion mainly include the following: loading by magnetic powder brakes, loading by dynamometers, and loading by hydraulic pumps. These loading methods have their own advantages and disadvantages, and can be applied to different occasions. [0003] The structure of the hydraulic pump torque loading system in the prior art includes a tor...
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IPC IPC(8): G01M99/00
Inventor 赵江波王军政李金仓汪首坤马立玲
Owner BEIJING INSTITUTE OF TECHNOLOGYGY