Asphalt pump mechanical seal repair errors introduced

1, the ring seal tight as possible . Asphalt pump stationary ring seals basically at a standstill , the effect will be relatively tight seal better, but too tight is harmful.
One cause static ring seals due to excessive building deformation, affecting the sealing effect ; two is mostly static ring material with graphite . Generally more brittle , excessive force can easily cause fragmentation ; three is to install , difficult to remove , easy to damage the stationary ring .
2, the new better than the old . Relatively new asphalt pump mechanical seal better than the old , but the new mechanical seal quality or choice of material is not the time , with the larger size of the error will affect the sealing effect : and permeability in the polymerization medium, such as non- stationary ring excessive wear, or not replaced as well. Because static ring stationary ring seat for a long time in a quiescent state , the polymer and impurities deposited into one. Played a better Plastic seal.
3 , static overhaul than never dismantle good, asphalt pump mechanical seal leakage will occur once the rush to overhaul . In fact , sometimes sealed and not damaged , simply adjust the working conditions or the seals can be adjusted to eliminate leakage. This way to avoid waste and to verify their ability to judge the fault has accumulated experience in maintenance to improve the quality of maintenance .
4 , impeller lock nut tight as possible . Asphalt pump mechanical seal leakage , the leakage between the sleeve and the shaft ( shaft between the leak ) is relatively common , generally believed that the impeller shaft lock nut ask leak did not lock their buying lead to leakage between axes many factors , If lapse between axes pad , offset shaft ask there impurities, with the shaft and sleeve at a larger form and position errors , contact surface damage. shaft there is a gap between the various components ; shaft threaded shaft is too long , and this will lead to between the leak. Lock nut locking pad between axes can only lead to excessive premature failure , contrary moderate lock locked mother, so always keep a pad shaft ask Piece Goods compression elasticity, in operation lock nut locking automatically timely , so that the shaft is always in a good inter- the sealed state .
5 , ring seals tight as possible , in fact, detrimental tight ring seals . First exacerbate the wear ring and sleeve between leakage ; Second, increasing the axial adjustment ring , the resistance movement , frequent changes in operating conditions can not make timely adjustments ; Third spring fatigue easily damaged : four is to make the move ring security stickers deformation, affecting the sealing effect.
6, the greater the amount of spring compression sealing the better . Its buy Otherwise, spring compression excessive friction can cause rapid wear , instantly burning ; excessive compression of the spring to lose the ability to adjust the ring face , resulting in seal failure.