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Fire pumps are now widely used, with many industries, including the fire protection sector, employing them. Fire pumps are equipped with features found in regular water pumps, offering higher performance, better materials, and greater stability. In industries such as firefighting, petroleum, natural gas, and water treatment, fire pumps are the most widely used. There are many types of fire pumps, including older models such as hand-cranked fire pumps. The most popular and common type nowadays is the motor-driven fire pump, that is, a fire pump powered by an electric motor. The motorized fire pump consists of two relatively independent components: the motor and the pump body, which are connected to each other by a coupling, thus forming a single integrated unit. Many people are interested in the working principle of motor-driven fire pumps. Today, Shanghai Liangong Pump Industry will provide a brief introduction to the working principle of fire pumps. By understanding the working principle of fire pumps, one can gain a better understanding of them and use them correctly. The fire pump consists of a stator part and a rotor part. The pump stator section consists of components such as the water inlet section, middle section, guide vanes, water outlet section, and seals. To prevent stator wear, the stator is equipped with sealing rings, balance sleeves, etc., which can be replaced with spare parts when worn out. The rotor section consists of a shaft, impeller, balance drum, etc. The lower end of the rotor is the impeller, while the upper end features angular contact ball bearings. The majority of the pump’s axial force is absorbed by the balance drum; the remaining small amount of axial force is taken up by the angular contact ball bearings. Rubber O-rings or metal O-rings are used at the joints of the inlet section, middle section, and outlet section to achieve sealing. As emergency equipment, fire pumps have higher requirements from the outset of design compared to ordinary water pumps, such as in terms of material selection. As an important component of fire pumps, the impeller is usually made of stainless steel or copper. This material selection is intended to prevent failures caused by rusting and corrosion. Article source: www.liangongpv.com