When the pump shaft and the packing friction generate heat, the water seal pipes the water to the water seal ring to cool the packing! Maintain the normal operation of the pump. Therefore, special attention should be paid to the inspection of the stuffing box during the touring inspection of the pump operation!

The packing should be replaced after 600 hours of operation. The working principle of the centrifugal pump The working principle of the centrifugal pump is: relying on the high-speed rotating impeller, the liquid gains energy under the action of inertial centrifugal force to increase the pressure. Before the pump works, the pump body and inlet pipe must be filled with water to prevent cavitation. When the impeller rotates rapidly, the blades prompt the water to rotate quickly, and the rotating water flies from the impeller under the action of centrifugal force. After the water in the pump is thrown out, the central part of the impeller forms a vacuum area.

The water in the water source is pressed into the inlet pipe through the pipe network under the action of atmospheric pressure (or water pressure). In this way, continuous water pumping can be realized. It is worth mentioning here that the centrifugal pump must be filled with water in the pump casing before starting, otherwise it will cause the pump body to heat up, vibrate, reduce the water output, and cause damage to the pump (referred to as "cavitation") ) Cause an equipment accident!

The Solar Photovoltaic Pump Controller cavitation refers to: when the centrifugal pump is started, if there is air in the pump, because the density of the air is very low, the centrifugal force generated after rotation is very small, so the low pressure formed in the center of the impeller is not enough to keep the liquid level lower than the pump inlet The phenomenon that the liquid is sucked into the pump and cannot deliver the fluid. There are many types of centrifugal pumps,

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