Electric mechanism torque testing device for switching valve

Abstract

The invention relates to an electric mechanism torque testing device for a switch valve, and belongs to the technical field of power device testing. According to the electric mechanism torque testingdevice for the switch valve, a hysteresis clutch is used as a torque load, the load is stable, the precision is high, and the service life is long; according to the device, torque is decomposed into force and force arms in a combined mode of an rocker arm and a tension and pressure sensor, torque measurement is achieved through the tension and pressure sensor, instantaneous response is fast, the problem that a traditional torque sensor is slow in small-range corner response is solved, and high-precision torque measurement of reciprocating operation within a limited angle range is achieved; thedevice applies a load moment through the hysteresis clutch, belongs to a non-contact mode, is friction-free, works stably for a long time, and can be used for testing the service life durability of an electric mechanism.

Description

technical field [0001] The invention belongs to the technical field of power device testing, and in particular relates to a torque testing device for an electric mechanism for an on-off valve. Background technique [0002] Different from traditional valves, the main features of electric valves are fast response, precise operation, and remote operation. With the wide application of electric valves, the core component of electric valves, the electric mechanism technology, has also been developed. Electric mechanism through After the motor and transmission structure decelerate and increase torque, the switch of the valve is generally reciprocating. The main performance indicators of the electric mechanism for switching valves are output torque and rotation angle. At present, the torque measuring device is usually used to test the electric mechanism. This type of torque measuring device It is mainly developed from the field of performance testing of dynamometer products. [000...

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Problems solved by technology

[0003] The existing torque measurement device consists of a magnetic powder brake, a torque sensor, an indexing plate, a base and a parameter acquisition system. The magnetic powder brake is used to apply the load torque, the torque sensor measures the torque, and the indexing plate realizes the angle measurement. In the actual measurement process, due to The operation mode of the switching valve is a reciprocating rotation at a certain angle, rather than a stable circular motion. Under the condition of small angle operation, the response of the torque sensor is not sensitive, resulting in a large error in torque measurement; the magnetic powder brake relies on magnetic powder to generate friction to form a load torque, which is limited. Due to the structure of the magnetic powder brake, as the running time increases, the magnetic powder reciprocating in a certain range will produce uneven distribution and magnetic powder heating, resulting in large fluctuations in the applied load torque and distortion, so it is impossible to achieve accurate torque of the switch valve electric mechanism Measurement and durability life test testing

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