Chemical centrifugal pump and oil seal leakage reason have?

by:J&T     2020-06-28
Chemical centrifugal pump is commonly used chemical liquid transport in the production of industrial pump with equipment, any equipment in a long time is often the wrong use or an improper maintenance problems, for chemical centrifugal water pump and equipment produced oil seal oil is what reason? Below is a list of several common problems; A, lip wear reason 1, cleanliness problems: sand casting, machining iron impurities, oil, etc. , stockpiling oil seal lip area, work occurs when abnormal wear and tear; 2, oil seal and axis coaxial, oil seal eccentric wear occurred after being connected, abnormal wear lip; 3, oil seal lip lithium base grease, can produce dry friction, lead to abnormal wear and tear. Second, the cause of the axis 1, axis surface roughness, hardness is not reasonable, auto industry choose roughness generally are not less than 0. 8, cooperate with oil seal parts will use high frequency quenching, hardness is not lower than HRC55; 2, the axis of rotation surface defects, such as corrosion, scratches, directional mark, etc. Three, skeleton reason due to oil seal spring material and manufacturing problems, lead to the failure in performance. Spring failure modes for: spring too tight or too loose, too loose when spring compression force is small, can not meet the sealing effect, too tight when the spring compression strength, oil seal and the mismatch between the axis of rotation, lead to abnormal wear of oil seal, oil spill. Four, the causes for the working medium, working medium is oil. Oil seal material selection should consider its compatibility with the oil, the compatibility is poor, can produce the lip swelling, hardening, softening and cracking occurred leak. Five, assembling reason 1, due to being connected in tooling, lead to oil seal after being connected in deformation; In the process of assembly, oil seal by screw thread or spline, cause the lip cut; 2, due to seal a lower roughness, pressed force is too large, lead to spring failure or lip flip.
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