A test system and method for storage modulus and loss modulus of o-ring

Abstract

The invention provides an O-ring storage modulus and loss modulus test system, which includes a control device, an electric device, a mechanical sensor, a displacement sensor, a first cycle stress applying device, a second cycle stress applying device, an O-ring Fixtures and fixtures, the control device are respectively connected to the electric device, the force sensor and the displacement sensor, the output end of the electric device is connected to the input end of the first cycle stress application device and the second cycle stress application device, and the control device controls the action of the electric device And receive the measurement data of the mechanical sensor and the displacement sensor. The invention also provides a method for determining the storage modulus and the loss modulus of the O-ring, which can measure the storage modulus and the loss modulus of the O-ring. In the aging / life test process, the present invention does not need to cut the rubber ring to measure the modulus of the rubber ring, which will not cause damage to the sealing ring and thus will not change the mechanical properties of the sealing ring.

Description

technical field [0001] The invention relates to the field of elastic body modulus measurement, in particular to a test system and method for storage modulus and loss modulus of an O-ring. Background technique [0002] O-rings are widely used in airborne sealing devices. The mechanical seal performance based on O-rings depends on three aspects. First, the sealing structure; second, the deformation of the O-ring after assembly; third, the O-ring The mechanical properties of the circle. The evaluation of mechanical seal performance requires the above three types of parameters, among which the seal structure and O-ring deformation can be directly obtained through the parameters of the seal structure. However, there is currently no direct measurement method for the mechanical properties of the O-ring, only an indirect method, namely The mechanical properties of the O-ring are replaced by the mechanical properties of the material. [0003] The viscoelasticity of the material is ...

AI Technical Summary

Problems solved by technology

The laboratory simulates the mechanical properties of O-rings as they change with the environment and load. It is necessary to measure the mechanical properties of O-rings at different times. Although material-level tests can be arranged to test with O-rings, standard-sized materials It is also difficult for the sample to simulate the working load (such as axial extrusion, etc.)

[0009] In the field sampling inspection, it is necessary to measure the mechanical properties of the O-ring to evaluate the overall sealing performance. At this time, because the material has no product history, its mechanical property data can only represent the O-ring before it is assembled and used. The status of the O-ring cannot be explained after the O-ring is assembled and used

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