The transformation of plant water pump seal

Rotating machinery as a pump , the shaft and the casing there is a gap between the necessity , in order to prevent discharge of liquid out of the pump or leakage of air into the pump ( inlet of vacuum ) , generally between the shaft and the pump casing provided with a shaft sealing device . Recent years due to the continuous development of high-temperature high-pressure pump , the pump seal problems have an impact on safety is one important factor . Shaft sealing device currently used generally have the following forms: packing seal , mechanical seals, labyrinth seals, floating ring seal , and for many of the low-pressure pump power plant , generally soft packing seal .
Multi-use asbestos , carbon fibers, PTFE resin and other materials woven into a square or circle. Soft packing seal has a versatile, cheap and so on . Plus the usual soft fillers such as leaking water pump , generally tight gland plate method . If not , you must stop the pump again for filler. And soft filler cycle is generally short and right sleeve wear larger , which makes routine maintenance increases, and not the economy. At this stage able to use other methods to use it instead of packing ? Foreign experience combined with China 's actual thermal power plant , the available injectable filler gun wadding method to replace the use of packing .
Soft packing filler gun injection principle is to pulpy soft packing high pressure pump filler injected into the chamber ,releasable cable tie which was replaced rope -like packing. Other parts of the packing room remains unchanged .
A transformation step
Because at this stage low-pressure pumps and more thermal power plant with packing seal , which faces an example of how to transform based on the original problem , based on experience and are summarized below .
1.1 clean packing room
Thoroughly clean the pump before the transformation good original packing room , does not allow any impurities and dirt. If seal ring, can be abandoned. This work must be carried Uncovery in order to save time and materials , it is best when the pump overhaul . This allows the overhaul and reconstruction synchronization.
1.2 water pump cover drilling
In order to inject fillers, must cover the installation of the injection hole connector. Joints need special processing, the threads need to cooperate with the filler gun fittings and connectors to be processed gland , for a water pump seal , seal tube can be removed directly in the water seal on the drilling and tapping.
1.3 plus packing
In order to prevent leakage and internal leakage filler is required at each end of the packing chamber before and after the installation of a circle packing, you can add carbon fiber packing or PTFE packing.security seal labels Because it is Uncovery added packing, so care must be taken plus packing clearance fit to close .
1.4 plus filler
First hand pressed into the filler packing room , without too tight. Then close the pump cover with gland packing rope , and then put the gun filler filler can be injected under pressure . At this time packing should be tight .