Horizontal multi-stage centrifugal pump mechanical seal

2018-01-11 Knowledge

There are four main kinds of horizontal multi-stage centrifugal pump mechanical seal parts.A. mainly seal ring and static ring. B. auxiliary seal: seal. C. pressure: spring. Ring. D. drive a: play basket and key or fixed screw
Machine sealing work matters should be paid attention to:
1. The matters needing attention during installation
A. Be very careful to avoid during the installation of the installation of the deviation
1) to tighten the gland should be performed after coupling alignment, the bolt should be uniform, prevent gland face skewed, with a feeler to check each point, the error is not more than 0.05 mm.
2) check the fit clearance of gland with shaft or sleeve diameter (namely) of concentricity, wants even all round, with a feeler check each point tolerance is not more than 0.01 mm.
B. the spring compression quantity according to provisions, there is no too big or too small, request error is 2.00 mm. Will increase the end face specific pressure, the other end surface wear. Starts to cause low pressure than not sealing effect.
C. ring beard after installation to ensure can flexible movement, the shaft will ring after pressure to the spring should be able to bounce back automatically.
2. Remove the matters needing attention
A. carefully when removing mechanical seal, it is forbidden to use the hammer and flat, so as not to damage the packing element. To do a pair of steel wire hook, in the direction of self-financing, into the driving seat gaps to pull sealing device. If the scale removing not bottom, should be cleaned before disassembly.
B. if on both ends of the pump mechanical seal, in assembly, disassembly process to take care of each other, to prevent the attend.
C. of mechanical seal, which had run for every gland loose moves in the seal, the dynamic and static ring parts must be replaced, should not be retighten continue to use. Because in the sample jacaranda, friction pair originally changes occurred in the running track will contact sealing is easily damaged.