Underwater sewage pump mechanical seal more common causes of submerged pump leakage. Mechanical seal itself is a high precision parts, the design, machining, assembly quality has high requirements. In the use of liquid sewage pump mechanical seal, the mechanical seal should be analyzed using a variety of factors that make the mechanical seal for a variety of liquid sewage pump technical requirements and the use of media requirements and adequate lubrication conditions, so as to ensure long-term sealing Reliable operation. Submerged sewage pump mechanical seal itself is a higher precision parts, the design, machining, assembly quality has high requirements. In the use of mechanical seals, the liquid sewage pump should be analyzed using a variety of mechanical seals of the various factors that make the mechanical seal liquid submersible sewage pump for a variety of liquid sewage pump technical requirements and the use of media requirements and adequate lubrication conditions, so In order to ensure the long-term reliable sewage sewer pump seal. Submerged sewer pump mechanical seal still exists in the design, selection, installation and other places not reasonable enough. Submerged sewage pump mechanical seal, also known as the end seal, which has a pair of perpendicular to the axis of rotation of the end surface of the liquid sewage pump in the fluid pressure and compensate mechanical external elastic force under the action of submersible sewage pump auxiliary seal with the other end Keep fit and slide relatively to prevent fluid leakage. (1) Liquid submersible sewage pump spring compression must be carried out according to regulations, not allowed to have too large or too small, the error Â± 2mm, excessive compression to increase the end surface pressure, friction heat too much, resulting in liquid sewage pump Seal surface thermal deformation and accelerated wear on the face, the compression is too small Dynamic and static end face pressure is not enough, you can not seal. (2) The end surface of the shaft (or sleeve) of the sealing ring of the liquid discharging sewage pump and the sealing gland (or shell) on which the stationary ring seal is installed should be chamfered and winked so as not to touch the movement during assembly Ring seal.
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