Working principle of submersible pumps

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The working part of the submersible pump is submerged in the liquid, and there is no leakage from the shaft seal. It also features a small footprint, reliable operation, easy maintenance, and strong corrosion resistance. It is widely applicable to industrial sectors such as chemicals, pharmaceuticals, papermaking, and petroleum. The vertical motor of the submersible pump is secured to the motor base with bolts, and it is directly connected to the pump via an elastic coupling. The pump body, intermediate pipe, pump frame, discharge pipe, and pipe flanges are all connected together with bolts to form a single unit, which is then fixed to the base plate; the entire pump is mounted on the container through this base plate. The axial and radial forces of the pump – including the water pressure generated during operation, as well as the weight of the impeller and rotor – are all managed by the one-way thrust ball bearings and single-row radial ball bearings installed within the bearing housing ； As well as the load borne by the sliding guide shaft to ensure the safe and normal operation of the pump. The bearings are lubricated with butter, while the guide bearings are lubricated by the liquid being transported. Therefore, the liquid level must be above the centerline of the impeller during operation. Depending on the length L of the part that extends into the container, they are further divided into types with an intermediate guide bearing and those without an intermediate guide bearing. Submersible pumps are manufactured in different specifications based on the length of their extension into the container (usually 1 to 1.5 meters). The working part is submerged in liquid, and the axial and radial forces generated by the pump’s operation are supported by rolling bearings and sliding bearings respectively ； Therefore, it runs quietly without noise. There is no liquid splashing at the shaft seal. The sealing packing area is equipped with a cooling system that can use cooling water to remove heat, depending on the temperature of the medium used by the user.