Testing apparatus for service life of load of valve execution mechanism and using method thereof

Abstract

The invention provides a testing apparatus for a service life of a load of a valve execution mechanism and a using method thereof. The testing apparatus comprises a rack, a rotating mechanism and a loading mechanism. The rack is supported between a top plate and a bottom plate by support posts. A testing plate covers the top plate. Rotating shafts are installed in bearings between the top plate and the bottom plate and the upper ends of the rotating shafts pass out of the top plate and a mounting plate. More than one rotating plate is installed on the rotating shafts horizontally and rotates with the rotating shafts. The loading mechanism includes friction plates and hydraulic systems; through holes are formed in the friction plates and the friction plates sleeve the support posts through the through holes. One friction plate is arranged below each rotating plate; and the friction plates are separated by sleeving rings arranged on the support posts. The hydraulic systems are installed on the bottom plate and mandrils of the hydraulic systems support the bottom friction plates; under pushing of the mandrils, upward contact with the rotating plates is realized and the last friction plate is pushed upwardly by the sleeving ring and is in contact with the rotating plate arranged on the friction plate; and the rotating plates and the friction plates in close contact with the rotating plates respectively generate friction and the friction forces are transformed into torques by the rotating shafts, thereby realizing testing of the service life of the load of the valve execution mechanism.

Description

technical field [0001] The invention relates to a device for testing the load life of a valve actuator and a method for using the same, belonging to the technical field of valve actuator quality detection. Background technique [0002] Valve actuators usually work under load. Therefore, the service life of valve actuators under load is an important quality and technical index of valve actuators. The most objective and fair way to investigate this technical index is of course the actual inspection during actual production and application. However, such actual inspection cannot be carried out on every valve actuator. Therefore, samples are taken according to certain rules. , and testing through laboratory loading tests has become an important method to investigate the service life of valve actuators under load conditions. [0003] When testing the load life of valve actuators in the laboratory, a load must first be added to the valve actuators, and then the test measurement i...

AI Technical Summary

Problems solved by technology

[0006] First of all, since the friction force of the device is generated by the deformation of the disc spring, once the force applied to the disc spring is determined, the spring force generated by the disc spring is also determined, so the friction force or load and damping are also determined, that is It can only correspond to one kind of load during the test and cannot be changed during the test, so the versatility of the device is poor;

[0007] Secondly, this type of device generates a lot of heat during operation, and the change of temperature has a great influence on the elasticity of the disc spring. Therefore, the torque of this device is uncontrollable. During the test, it cannot provide a constant load as a test. standard;

[0008] In addition, this kind of device is easy to get stuck during use, and the disc spring is also easy to deform and fall out, resulting in loading failure.

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