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在密封活动表面(快速转轴)时,油封的密封唇部的位移速度(V_M)取决于橡胶的弹性。当V_M值等于或小于轴的径向位移速度(V_B)时,由于在密封唇部与轴之间形成间隙而使部件的密封性破坏。阐明橡胶的弹性对油封工作能力的影响是有意义的。图1为为此目的而专门设计的装置的示意图。装置的测量部分是一种半桥,它由粘合在弹性杆2上的工作的和补偿的张力付感器组成,弹性杆的一端与被试验油封3的唇部固定,另一端与调节杆的位置的活动托架4连接。籍助按装在轴6上的可换垫圈5,可给出轴的跳动量。在必要时,通过按装在压盖7中的接咀8输入带压介质。
When sealing the active surface (fast shaft), the displacement speed (V_M) of the seal lip of the oil seal depends on the elasticity of the rubber. When the V_M value is equal to or smaller than the radial displacement speed (V_B) of the shaft, the sealing of the part is broken due to the formation of a gap between the sealing lip and the shaft. It is instructive to clarify the impact of rubber elasticity on the ability of the oil seal to work. Figure 1 is a schematic illustration of a device specifically designed for this purpose. The measuring part of the device is a half-bridge consisting of a working and compensating tension sensor bonded to an elastic rod 2, one end of which is fixed to the lip of the oil seal 3 to be tested and the other end of which is connected to an adjusting rod The position of the movable bracket 4 is connected. By virtue of installed on the shaft 6 can be replaced washer 5, can give the amount of shaft beating. Pressurized media are fed, as necessary, by means of a nipple 8 mounted in a gland 7.