泵的填料密封(国外英文资料).docVIP

泵的填料密封(国外英文资料) The chemical pump packing seal is the packing of compressibility and resilience The basic structure of the chemical pump consists of six parts: impeller, pump, pump shaft, bearing, sealing ring, stuffing box. Chemical pump packing seal is full of compressibility and resilience of packing into the stuffing box, rely on the gland of axial compression force into radial sealing force, so as to play a role of sealing. This sealing method is known as packing seal, which is called sealing packing. Because of the packing seal structure is simple, easy to change, price is low, to adapt to the speed, pressure, medium broad and widely used in the design of the chemical pump. Medium under normal temperature, the chemical pump packing seal is generally equipped with packing ring, its or chemical pump and high pressure chamber, or external liquid medium with certain pressure, cooling, lubrication, sealing or flushing effect can be. Because packing seal is a contact seal, friction and wear are necessary. The size of friction and wear is determined by the pressure of the packing gland. The pressure can increase the sealing effect, but it will increase the power consumption and the wear of the shaft sleeve, and the reverse will result in a large chemical pump leak. The pressure of the gland should be adjusted according to the size of the leak and the temperature of the leak medium, and the filling should be replaced or replenished when necessary. Reasonable leakage of chemical pump packing seal is 10-20ml/min. When introducing the liquid from the outside world, shall ensure that the liquid has a good chemical stability, chemical pump is conveying medium, neither pollution nor sediment and solid particles produced with the media, but should also have good impregnated with packing and lasting stability, so it can play a good and lasting chemical pump seal. The material of the commonly used sealing material of chemical pump The chemical pump series contains the main mat