Installation And High-speed Mechanical Seals Knowledge
Mechanical seals installation steps of how it is
, where I explain to you some details:
1. Do pre-installation inspection and preparation.
2. Static ring on the gland assembly.
3. Ring and transmission assembly seat.
4. Mechanical Seals and seat fixed to the sleeve on the drive.
5. Install with a stationary ring of the gland. Pressed in the screw cap bolts to guard against end-skewed, even on the screws. Check with a feeler end gland and the gap sealed box, the error is not sub-0.04mm. Check gland and static ring on the shaft of the radial clearance, along various points around the error is less than 0.10mm.
6. Barring checks gland, static ring and the shaft (sleeve) whether there is friction plate car feel should be uniform, light.
7. Install auxiliary facilities such as irrigation and cooling water pipeline, coolers, filters and so on.
8. The pump inlet valves open, the introduction of medium static pressure test, check the mechanicle seals. If there is no leakage, slow drive car, check for leaks while also excluding the sealed chamber of the gas (this is very important), gradually speed up the disk car speed, and then start the pump, no leaks or minor leaks can be put into operation or stopped standby pump.
Next, I will tell you what is meant by high-speed mechanical seals and its use, we want to help.
Seals, the average speed over 30m / s referred to as high-speed mechanical seals. Currently, high-speed centrifugal pumps and compressors shall be guilty of high-speed mechanical seals. Some high-speed pumps are vertical, and by the growth rate to achieve high-speed gear transmission, generally 1 to 20 000 r, / min, some more than aTr / min, shaft is not large, the 40mm or so, the sealing surface wire-speed 30 ~ 50m / s. There is a mechanical seal is a high-speed pump with mechanical seals, they are multi-spring, flow, balance type static seals. Static ring stone ink manufacturing of tungsten carbide ring. Pump equipped with rotary liquid separator body, separation of liquid to wash and clean sealing liquid containing impurities back to the entrance of the pump, the amount of Orifice control and irrigation, according to the nature of media and pressure, also can use double or tandem mechanical seals. Many types of centrifugal compressor shaft mechanicle seals, mechanical seals can be used at low pressure. Centrifugal compressor speed 8000 ~ 14000r/min, larger shaft diameter, generally 100mm above the wire-speed Friction much larger than the high-speed pumps, in the 50 ~ 90m/80 Therefore, its more prominent features of high speed. Another is the design and manufacture of the first high-speed centrifugal compressor gas seal. The structure of multi-spring, stationary, internal flow, balanced double mechanical seals, the two groups share a static ring ring. Sleeve diameter lomm, speed 8500r/min, Seals speed 55.2m / s, load factor for the o. '729 Spring than the pressure is o. 29MPa, the sealing surface width 3mm less. Ring material for high-speed steel (w18Cr4V), hardness of HRc after quenching is greater than equal to 60, static ring material is graphite (grade M106H), the leakage rate for the 150 ~ 250ml / h, the general life of a production cycle (10 months ,) up to two life-cycle life.
by: lucy00123
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