Electric gear pump units in operation, the reason of mechanical seal leakage mainly include: 1) High temperature electric gear pump impeller shaft crew to momentum over standard, axis of periodic vibration and unstable operation, seal chamber pressure change frequently, etc all can cause periodic leak sealing; 2) Friction pair cannot damage or deformation and running-in caused leakage; 3) High temperature improper gear oil pump seal material selection, swelling miss; 4) High temperature big spring turning gear pump is wrong; 5) Heat the gear oil pump vibration during operation is too large; 6) High temperature gear oil pump dynamic and static ring and the shaft sleeve is formed between scale make the spring miss and can't compensate the wear of sealing surface; 7) High temperature sealing ring gear pump occurred cracks, etc. The high temperature electric gear pump unit caused by bad installation, mechanical seal leakage. Mainly manifested in the following aspects: 1) High temperature electric gear pump leak unit shaft sleeve, sealing ring is not installed or compression force is not enough; 2) High temperature electric gear pump unit on the collar seal activities have corrosion points; 3) High temperature uneven spring force of gear pump, single spring not vertical, spring more different length; 4) The heat seal cavity end face gear gas booster pump and axis vertical degree is not enough; 5) High temperature dynamic gear pump, the static ring contact surface uneven, bruised when installation, damage; 6) High temperature gear oil gas booster pump dynamic and static ring sealing ring size is wrong, damaged or was not pressure; 7) High temperature dynamic gear pump, the static ring v-shaped sealing ring, way or reverse side during installation. Key words: oil pump power plant, oil pump unit equipment, electric pump power plant manufacturers
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