Pump stop running, maintenance and seal failure of gear. 3

the quality of gear pump gear pump is very good, there are some special applications. Stainless steel pump, however, when the work some unexpected problems, such as downtime. It is necessary for us to analyze the main reason for the downtime, so the machine can avoid unnecessary damage to the future. Down is mainly due to the mechanical seal failure. After stop running gear pump maintenance and seal failure. Failure of performance, mainly leakage, leakage of the following: (1) static sealing surface leakage ring main reason: at the end of flatness and roughness is not in conformity with the requirements, or surface scratch; Between the particle surface, resulting in the ends of the surface is not the same, the installed, and way is not correct. (2) compensation ring seal leak, the reason is: gland deformation, uneven pre-tightening force, improper installation, seal is not in conformity with the quality standards; The choice of ring is wrong. Vortex street flowmeter after gear pump stop running requirements: (1) crystallization transportation, easy coagulation, precipitation and other media pump, pump stop, should prevent blockage, and immediately with water or other medium, pumps and pipe cleaning. (2) heat pump equipment parking implement the provisions of the technical documentation should stop, until the pump rotation to the half circle of the minutes, until the temperature drops to ℃. (3) the low temperature pump stop, no special requirements, the pump should always be full of liquid, suction and discharge pneumatic valve should maintain a normally open state; Double low temperature, liquid level controller, pump mechanical seal, the sealing of the pump cavity sealing liquid grouting high-pressure pump should be maintained. (4) centrifugal pump should be turned off after running pump stop pneumatic valve of the population, and then points, until the pump system cooling pneumatic valve shut off. Drain water pump, in order to prevent corrosion and cracking. Keywords:

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