Service life tester of value execution apparatus

Abstract

The invention discloses a service life tester of a value execution apparatus. A supercharging assembly, a hydraulic assembly, a high-pressure oil cylinder, a friction clutch load torque device, a dynamic torque sensor, and an angle encoder of the service life tester are successively connected. The angle encoder is connected with the value execution apparatus to be detected. The supercharging assembly supercharges hydraulic oil. The hydraulic assembly outputs pressure to the high-pressure oil cylinder and controls the pressure. An oil cylinder compacting member is disposed in the high-pressure oil cylinder and converts vertical compaction force into torque load in cooperation with the friction clutch load torque device and the value execution apparatus is tested through the dynamic torque sensor and the angle encoder. By means of the cooperation of the friction clutch load torque device and the oil cylinder compacting member in the high-pressure oil cylinder, the axial vertical compaction force of the high-pressure oil cylinder is highly efficiently converted into the load torque of the value execution apparatus, and thus comprehensive tests can be performed on multiple key positions of the value execution apparatus.

Description

technical field [0001] The invention belongs to the field of testing valve actuators, in particular to a life testing machine for valve actuators. Background technique [0002] The quality of the valve actuator is very important, and an effective life test can guarantee the quality and improve the reliability. A good life test device can conduct comprehensive tests on many key parts of the valve actuator, such as worm gear, gear pair, operating efficiency, maximum control torque, position control accuracy, etc., to more realistically simulate the working conditions and various aspects of the valve. Performance parameter data, optimize valve structure design calculation, material, driver selection, etc. [0003] The existing valve actuator life test system uses hydraulic control to simulate the change of valve opening and closing torque. It is composed of a hydraulic loading device, a hydraulic control system and a circulating cooling system. Proportional regulation of high...

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Problems solved by technology

[0003] The existing valve actuator life test system uses hydraulic control to simulate the change of valve opening and closing torque. It is composed of a hydraulic loading device, a hydraulic control system and a circulating cooling system. Proportional regulation of high pressure and high pressure, monitoring the pressure at the high pressure end, combined with the rotary torque sensor to control the stroke to the closed-loop control of the output torque of the valve electric device. Due to the incompressibility of the hydraulic medium in the load circuit, the loading speed of the actuator must be very slow. Sufficient adjustment time to ensure that the proportional relief valve can adjust the back pressure The pressure stability is not high, the entire control system is complicated, the manufacturing and maintenance costs are high, and the maximum load torque characteristic is only 1200N.m, mainly because the design principle limits the maximum Torque load, and this way of simulating the valve stem nut to achieve the load torque value has low accuracy and large errors, and the test results are not convincing

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