密封件蠕变松弛试验装置

Abstract

本实用新型公开了一种密封件蠕变松弛试验装置，包括加载模组与试验模组，试验模组包括具有试验密封件的主体组件、加热组件、隔热组件及保温组件，加载模组包括通过连接组件连接的底架与顶架，顶架上设置有用于加载的顶推组件。采用该试验装置对密封件进行蠕变松弛性能测试时，能够将与测试对象无关的部件产生的蠕变松弛都进行隔离，同时还能够避免检测元件因温度等造成的影响，消除了对测试结果的干扰，能够直接地反映试验密封件的蠕变松弛性能，能够解决核电、石化等重要设备上使用的关键密封件的寿命预测难题，降低突发故障的概率，提高工业装备的安全性。

Claims

1. A seal creep relaxation test apparatus characterized by, The testing apparatus includes a loading module and a testing module, the testing module comprising: The main components include an upper mold, a lower mold, and a test seal. The lower end face of the upper mold forms a first sealing surface. An annular groove is provided on the lower mold. The test seal is fitted in the annular groove, and the upper end face of the test seal abuts against the first sealing surface along the axial direction. The heating assembly includes an upper heating element and a lower heating element, wherein the upper heating element covers the upper mold and the lower heating element supports the lower mold. A heat insulation assembly includes an upper heat insulation component and a lower heat insulation component, wherein the upper heat insulation component covers the upper heating component and the lower heat insulation component is disposed below the lower heating component; A thermal insulation component is disposed on the circumferential outer side of the main component, the heating component, and the heat insulation component, such that the thermal insulation component and the heat insulation component cooperate with each other to form a test chamber; The loading module includes: The base frame has a support platform on which the test module is supported; The top frame includes a top seat and a pushing assembly. The pushing assembly is adjustablely mounted on the top seat in the vertical direction. The pushing assembly has a pushing surface located below the top seat, and the pushing surface can abut against the upper end of the test module in the vertical direction. A connecting assembly is connected between the base frame and the top frame to adjust the distance between the bearing platform and the pushing surface. The connecting assembly includes multiple columns extending in the vertical direction and locking nuts threaded to the columns. All the columns are distributed circumferentially at intervals and located on the circumferential outside of the test module. The test apparatus further includes a displacement detection element and a load detection unit, wherein the displacement detection element is configured to detect the displacement of a first set position on the upper mold relative to a second set position on the lower mold, and the load detection unit is configured to detect the loading force of the push assembly on the test module in the vertical direction.

2. The seal creep relaxation test apparatus of claim 1, wherein: The upper end face of the lower mold forms a second sealing surface. The first sealing surface and the second sealing surface are always provided with a gap. The displacement detection element is configured to detect the vertical distance between the first set position and the second set position, wherein the first set position is located above the first sealing surface and the second set position is located below the second sealing surface.

3. The seal creep relaxation test apparatus of claim 2, wherein: The displacement detection element is a non-contact sensor.

4. The seal creep relaxation test apparatus of claim 1, wherein: The locking nut is located above the top frame, and the load detection unit is arranged vertically between the locking nut and the top frame.

5. The seal creep relaxation test apparatus of claim 4, wherein: Each set of columns and locking nuts is equipped with a load detection unit.

6. The seal creep relaxation test apparatus of claim 1, wherein: The test module also includes a cooling assembly, which includes an upper cooling plate and a lower cooling plate. The upper cooling plate is located above the upper heat insulation component, and the lower cooling plate is located below the lower heat insulation component. The test module is supported on the support platform by the lower cooling plate, and the push surface abuts against the upper part of the upper cooling plate.

7. The seal creep relaxation test apparatus of claim 1, wherein: The jacking assembly includes a support plate and multiple jacking rods. The jacking surface is disposed on the support plate. All the jacking rods extend vertically and are spaced apart from each other. The jacking rods are configurably connected to the top seat in the up-down direction. The support plate is located below the jacking rods, and the bottom of all the jacking rods abuts against the support plate in the vertical direction.

8. The seal creep relaxation test apparatus of claim 7, wherein: The plurality of push rods are evenly spaced on a circumference with the axis of rotation of the annular groove as the center line, and / or the plurality of push rods include at least a central push rod, the axis of which extends collinearly with the axis of the annular groove.

9. The seal creep relaxation test apparatus of claim 1, wherein: The testing apparatus also includes a machine platform and a lifting drive mechanism, wherein the base frame is fixed on the machine platform, and the top frame is driven by the lifting drive mechanism to be raised and lowered in the vertical direction.

10. The seal creep relaxation test apparatus of any one of claims 1 to 9, characterized in that: The testing device further includes a detection module, which is signal-connected to the displacement detection element and issues an alarm signal when the displacement acquired by the displacement detection element changes; and / or, the detection module is signal-connected to the load detection unit and issues an alarm signal when the acquired loading force changes.

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