An experimental teaching system and experimental method of heavy load hydraulic transmission

Abstract

The invention discloses a heavy object loading hydraulic transmission experiment teaching system and an experiment method thereof. The structure of the system is that one end of a guide rod 15 is vertically connected to the center of a tray 17, the other end of the guide rod 15 is connected to a steel wire rope 14, the steel wire rope 14 is changed into a horizontal direction from a vertical direction through a pulley assembly 13 and then connected to a force sensor 12, a hydraulic cylinder 11 is horizontally installed, and the other end of the force sensor 12 is connected to a piston rod of the hydraulic cylinder 11; a port A of a hydraulic direction-changing valve 7 is connected to a rodless cavity of the hydraulic cylinder 11, an inlet of a one-way throttle valve 9 is connected to a rod cavity of the hydraulic cylinder 11, an outlet of the one-way throttle valve 9 is connected to an inlet of an internal control sequence valve 8, an outlet of the internal control sequence valve 8 is connected to a port B of the hydraulic direction-changing valve 7, a port P of the hydraulic direction-changing valve 7 is connected to an outlet of a filter 4-1, an inlet of the filter 4-1 is connected to an outlet of a hydraulic pump 2, an inlet of the hydraulic pump 2 is connected to an oil tank 20, an output shaft of a motor 1 is connected to the hydraulic pump 2, a port T of the hydraulic direction-changing valve 7 is connected to an inlet of a cooler 19, an outlet of the cooler 19 is connected to an inlet of a filter 4-2, and an outlet of the filter 4-2 is connected to the oil tank 20. Adoption of the heavy object loading hydraulic transmission experiment teaching system can save the power loss of a hydraulic transmission system, and the loading efficiency is improved.

Description

technical field [0001] The invention belongs to the field of fluid transmission and control. Background technique [0002] Hydraulic transmission has the outstanding characteristics of close combination of theory and practice, strong practicality, strong engineering, and wide application. It is a professional and technical basic course for engineering majors such as mechanical engineering, mechatronics engineering, and vehicle engineering. The experimental teaching of hydraulic transmission is an important practical teaching link in the combination of theory and practice of hydraulic transmission course. It is an important teaching method to learn, understand and master the theoretical knowledge of hydraulic transmission. It is also an important technical means to cultivate students' practical ability and hands-on operation ability. The experimental teaching of hydraulic transmission is usually carried out on the experimental teaching device of hydraulic transmission, includ...

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Problems solved by technology

[0003] In the hydraulic transmission experimental teaching system, the experimental teaching is carried out under the condition of loading the hydraulic cylinder, which can simulate the working load of the experimental hydraulic cylinder, but a set of hydraulic loading circuit device will be added to make the circuit of the hydraulic transmission experimental teaching complicated. , the efficiency of experimental teaching is reduced, and the hydraulic loading circuit will increase the energy consumption of the system, and the total power of the system will increase

[0004] In the hydraulic transmission experimental teaching system, the experimental teaching is carried out under the no-load condition without loading, and some verification experimental teaching content under the no-load condition can be carried out, but the experimental teaching content with load cannot be completed, which will make the experiment The experimental teaching content that can be carried out by the teaching device is limited

[0005] In the hydraulic transmission experiment teaching system, the speed of the hydraulic cylinder is usually measured indirectly or not measured by measuring the flow rate. Outflow

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