Measuring the size of the sealing surface of the dynamic and static ring of the mechanical seal is used to detect the dynamic and static mechanical seal

Measure the size of the sealing surface of the dynamic and static rings of the mechanical seal. This data is used to verify the radial width of the static and dynamic rings. When different friction materials are selected, the radial width of the hard material friction surface should be 1 to 3 mm larger than that of the soft material, otherwise it is easy to cause the edges and corners of the end surface of the hard material to be embedded in the soft material. face up.

Check the gap between the dynamic and static rings and the shaft or bushing. The inner diameter of the static ring is generally 1-2 mm larger than the shaft diameter. For the dynamic ring, in order to ensure floating, the inner diameter is 0.5-1 mm larger than the shaft diameter to compensate for the shaft. Vibration and deflection, but the gap should not be too large, otherwise the dynamic ring seal will be stuck and the mechanical seal performance will be damaged.

Calibration of mechanical seal tightness. The mechanical seal tightness we usually talk about is the specific pressure of the end face. The specific pressure of the end face should be appropriate. If it is too large, it will heat up the contact surface of the mechanical seal, accelerate the wear of the end face, and increase the friction power; if it is too small, it will easily leak. The specific pressure of the end surface is determined during the design of the mechanical seal, and we can only determine it by measuring the tight force of the mechanical seal during assembly. The measurement method of the usual environment is to measure the vertical distance from the end face of the installed static ring to the end face of the gland, and then measure the vertical distance from the end face of the moving ring to the end face of the gland. The difference between the two is the tightening force of the mechanical seal.