What is the principle for determining the interference value of a hot-fit sealing ring?
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The principles to be followed in determining the interference value are: 1) From the perspective of torque transmission, the interference value should be large enough so that the frictional resistance torque generated at the interface between the ring and the seat under operating conditions (mainly temperature) is greater than the frictional torque between the sealing surfaces. 2) From the perspective of ring deformation and strength, the interference value should not be too large; the compressive stress resulting from interference should be kept as low as possible, so as to minimize ring deformation and prevent it from breaking. Taking everything into account, the smallest interference value is chosen as long as it satisfies the requirements for torque transmission by the ring and seat as well as sealing performance.
Determining the interference value of the hot-mounted sealing ring is necessary to ensure that sufficient frictional torque is generated under operating conditions, in order to transmit torque and maintain the seal； At the same time, the deformation and strength of the sealing ring must be taken into account to prevent damage to the sealing ring due to an excessive interference fit. Therefore, the smallest interference value should be chosen while ensuring performance. .