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Device and method for testing rebound rate of O-shaped sealing ring

A testing device and rebound rate technology, which is applied in the direction of testing material hardness, etc., can solve the problems of sealing ring and sealing surface contact pressure seal failure, rubber ring rebound speed can not respond to the deformation of shell structural parts in time, and achieve stable performance , Reliable structure and simple principle

Active Publication Date: 2015-04-29
中国航天科工集团第六研究院四十一所
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AI Technical Summary

Problems solved by technology

Due to the deformation and viscoelastic retardation of the rubber material, under the impact load at the moment of ignition of the solid rocket motor, the rebound speed of the rubber ring of the "O"-shaped sealing structure may not be able to respond to the deformation of the shell structure in time. The contact pressure with the sealing surface is too small or a gap is generated, causing the seal to fail

Method used

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  • Device and method for testing rebound rate of O-shaped sealing ring
  • Device and method for testing rebound rate of O-shaped sealing ring
  • Device and method for testing rebound rate of O-shaped sealing ring

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Embodiment Construction

[0019] Such as figure 1 As shown, an "O" type sealing ring rebound rate test device includes a bidirectional suction cup type double iron core electromagnet and a laser distance sensor 8 . The two-way suction cup type double iron core electromagnet includes a compression electromagnet 7, a rebound electromagnet 2, an "H" type moving iron core 3, 2 connecting plates and a "U" groove pressing plate 6. The structural size, compression force and rebound rate of the bidirectional suction cup type double iron core electromagnet are determined comprehensively according to the material, size and compression rate of the sealing ring, and the bidirectional suction cup type double iron core electromagnet adopts interlocking; The diameter and compression ratio of the sealing ring are determined; the aluminum thin strip 4 is made of aluminum thin with a length of 60 mm, a width of 5 mm, and 0.05 mm; the installation size, measurement range, accuracy and sampling frequency of the laser disp...

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Abstract

The invention belongs to the field of material performance tests and in particular relates to a device and a method for testing the rebound rate of an O-shaped sealing ring. The device consists of a compression / rapid release device and an optical speed measurement system, wherein the compression / rapid release device realizes compression and rapid release of the sealing ring by adopting a two-way electromagnet; and the optical speed measurement system tests a relationship between the rebound displacement of the sealing ring and the time by adopting a laser displacement sensor so as to obtain the speed change in the rebound process. The device has the characteristics of simple structure, stable performance and high measurement accuracy. The device is applied to testing the rebound rate of the sealing ring and is also applied to testing the rebound performance of other elastic materials and structural members.

Description

technical field [0001] The invention belongs to the field of material performance testing, and relates to material rebound performance testing, in particular to a testing device and method for the rebound rate of an "O"-shaped sealing ring used in a solid rocket motor. Background technique [0002] The rebound characteristic of the sealing ring is a main special performance index to characterize the dynamic sealing performance, which reflects the deformation characteristic of the elastic internal energy released freely after the rubber material is compressed and reaches the state of entropy balance. Rubber materials have typical viscoelastic properties, and their parameters change over a certain time course. Due to the deformation and viscoelastic retardation of the rubber material, under the impact load at the moment of ignition of the solid rocket motor, the rebound speed of the rubber ring of the "O"-shaped sealing structure may not be able to respond to the deformation o...

Claims

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Application Information

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IPC IPC(8): G01N3/40
Inventor 郭宇李树谦李志杰陈晓明
Owner 中国航天科工集团第六研究院四十一所
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