Assembly method of cartridge mechanical seal

Assembly method of cartridge mechanical seal (1) Assembly of gland and bellows The gland and bellows are connected with 6-12 bolts, and there are gaskets between them to prevent medium leakage. (2) Hard ring positioning First fix the fixing ring on the counterbore of the shaft sleeve, and then put the gland and bellows assembly to make the Grundfos mechanical seal and the fixing ring close, and put the hard ring and wedge ring And rotate the seat ring, after determining the position of the rotating seat ring, slightly tighten the ring to tighten the screw, the ring and the hard ring are connected with screws, and the fixed ring, gland, and bellows components are taken out. (3) When the end face is aligned, the rotating seat ring and the hard ring are connected to the shaft sleeve, and mechanical seals must be imported to maintain the verticality of the end face. Generally ensure that the end face runout is less than 0.05mm. On the assembly platform, after tightening the set screw on the rotating seat ring, use the dial indicator to align it while tightening the screw connecting the rotating seat ring and the hard cartridge mechanical seal ring. To ensure the verticality of the end face. (4) Adjustment of compression amount The compression amount of the cartridge bellows mechanical seal is reflected in the thickness of the positioning block. However, some special users need different compression amounts, which can be adjusted according to the following methods: 45 and 55 series seals. When determining the position of the hard ring, place the aluminum water-retaining plate on the gland on the recess of the shaft sleeve matching the positioning block (positioning fork) On the outer edge of the groove, the rotating seat ring and the hard ring are tightly attached to the graphite ring and fixed on the shaft sleeve. After being put into the positioning plate, the compression amount is the designed compression amount, which is the thickness of the fork plate. Changing the amount of compression can move the hard ring back and forth on the sleeve, and the amount of movement is the changed amount of compression. For the 60, 70, 85, 90, 120 series of seals, the position of the hard ring is the position when the gland water-retaining aluminum plate is attached to the fixed ring, and the compression is the thickness of the positioning block. If the amount of compression is changed, the hard ring can be moved back and forth on the sleeve. The amount of movement is the amount of change in the amount of compression. The amount of compression in the forward movement increases, and the amount of compression in the backward movement decreases. Keywords: Grundfos mechanical seal, imported mechanical seal, cartridge mechanical seal