Water pump mechanical seal flushing structure

Abstract

The invention provides a water pump mechanical seal flushing structure, and belongs to the technical field of machinery. According to the water pump mechanical seal flushing structure, a water pump comprises a pump body and a pump shaft horizontally arranged in the pump body, an annular groove used for containing a mechanical seal is formed between the pump body and the pump shaft, a water inlet channel enabling the annular groove to communicate with the outside of the pump body is arranged in the pump body, the cleaning structure comprises a pipe fitting arranged outside the pump body, the pipe fitting comprises a water inlet end, a water outlet end and a buffering end which are all in a pipe shape, the water outlet end communicates with the water inlet channel through a pipeline, the water inlet end communicates with an inner cavity of the pump body, the buffering end and the water inlet end are linearly distributed, and the water inlet end is located between the pump body and the buffering end; a sealing block is arranged in the buffering end in an up-down sliding mode, and a seal is formed between the sealing block and the inner wall of the buffering end through a sealing ring; and a spring enabling the sealing block to have the downward sliding tendency is arranged in the buffering end, a spring is located above the sealing block, and an annular blocking shoulder used for limiting the downward sliding distance of the sealing block is integrally formed on the inner wall of the buffering end. The water pump mechanical seal flushing structure can realize constant-pressure flushing.

Description

technical field [0001] The invention belongs to the technical field of machinery, and relates to a water pump, in particular to a water pump mechanical seal flushing structure. Background technique [0002] Centrifugal water pumps work by rotating the impeller to cause centrifugal motion of the water. [0003] Existing centrifugal pumps generally include a pump body and a pump shaft that is rotatably arranged in the pump chamber of the pump body. Both ends of the pump shaft are sealed with the pump body through mechanical seals. The water in the pump chamber is led out by the pipeline system to flush the mechanical seal. [0004] Due to the actual operation of the centrifugal pump, due to its own or external influence, there are more or less suction fluctuations, resulting in certain pressure fluctuations in the water introduced from the pump chamber. If the pressure is too large, the water pressure will cause a greater impact on the mechanical seal. , increase the probabi...

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Problems solved by technology

[0004] Due to the actual operation of the centrifugal pump, due to its own or external influence, there are more or less suction fluctuations, resulting in certain pressure fluctuations in the water introduced from the pump chamber. If the pressure is too large, the water pressure will cause a greater impact on the mechanical seal. , increasing the probability of damage to the mechanical seal, resulting in poor service life

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