Dynamic seal failure of the pump packing seals

The rich compressibility and resiliency stuffing into the stuffing box gland axial compression force to rely on the radial sealing force transformation , and thus play a role in sealing . This sealing method is called packing seal, this seal packing filler called . Because packing structure is simple , easy to replace , inexpensive, adaptation speed, pressure ,vehicle seals  medium broad and the pump design has been widely used. Transport medium at room temperature , the packing seal packing ring usually has its or high-pressure chamber communicates with the pump , or an external liquid medium with a certain pressure , can play a cooling, lubrication , sealing or flushing effect .
Since packing is a contact seal , so there must be friction and wear problems . The friction and wear size mainly depends on the packing gland clamping force . Pressure can improve the sealing effect , but it will increase the power consumption and the wear sleeve , otherwise it will have a greater leakage. Therefore, the size should be based on the amount of leakage and leakage of the medium temperature of the gland to adjust the pressing force , if necessary, the filler should be replaced or supplemented . Reasonable packing seal leakage is generally 10-20ml/min. When the liquid is introduced from the outside , should ensure that the liquid has good chemical stability ,black cable ties neither the transmission medium pollution pump , not react with the media and solid particles and precipitates , the filler should have a good impregnation and lasting retention, so that we can play a good and long-lasting seal.