Measuring device and measuring method for shaft-holding force of seal

A measuring device for a shaft-holding force of a seal, comprising a drive assembly, a first pressing plate, a pressure sensor, an adiabatic rod, a conical shaft, a first support, a second support, a test box and a seal;

• the first support is fixed to the second support, the second support is fixed to the test box, the test box comprises a test chamber, the conical shaft and the seal are located in the test box, the seal is set on the test chamber, the seal is in contact with an inner wall of the test box, the pressure sensor is located outside the test box, the adiabatic rod slidably passes through the second support, and the pressure sensor and the conical shaft are respectively fixed at two ends of the adiabatic rod;
• the drive assembly is installed to the first support, the drive assembly is fixedly connected with the first pressing plate, the first pressing plate is fixedly connected with the pressure sensor, and the drive assembly is used to move the first pressing plate, the pressure sensor, the adiabatic rod and the conical shaft along a first direction, and the conical shaft is used to compress an interference amount of the seal to a preset interference amount during movement in the first direction.