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IS centrifugal water pump is designed according to the national standard ISO2858 and is manufactured according to the national standard SIO199 / DIS. Compared with the old products, the IS centrifugal water pump is increased in efficiency by about 5% and the NPSH is reduced by 2% Stable performance, the size of the parts to achieve standardized energy-efficient products, is the National Machinery Industry identified to take the old anti-corrosion pump and replace imported energy-saving replacement products. Interpretation of IS centrifugal water pump structure and structure description (A) IS centrifugal water pump structure and the structure of the pump for the rear open, remove the pump cover and impeller without dismantling the suction and discharge piping. Suspension equipped with two ball bearings, with machine oil or grease lubrication. The pump is driven directly by the motor via a flexible coupling. Vortex chamber, feet, water flange and outlet flange cast as a whole. (II) Structure Description of IS Centrifugal Water Pump The IS and IR pumps are designed according to the performance and size stipulated by the national standard IS02858 and are mainly composed of the pump body (1), the pump cover (2), the impeller (3), the shaft 4), seal ring (5), bushings (8) and suspension bearing components (12). IS, IR pump body and pump cover part of the pump is split from the back of the impeller, which is commonly referred to as the rear door structure. The advantage is easy maintenance, maintenance pump body, suction line, exhaust pipe and motor, just remove the longer coupling intermediate coupling, you can exit the rotor parts for overhaul. Pump housing (ie, pump body and pump cover) constitute the pump studio, impeller, shaft and rolling bearings for the pump rotor. Suspension bearing components support the pump rotor components, rolling bearings to withstand radial and axial pump force. In order to balance the pump axial force, most of the pump impeller front and rear are equipped with a seal ring, and in the impeller rear cover with a balance hole, due to some pump axial force is not large, the impeller is not provided on the back of the seal ring and Balance hole. Pump axial seal ring is composed of packing gland (9), packing ring (10), and packing (11), etc., to prevent air intake or a lot of water leakage. If the pump impeller is balanced, the cavity filled with soft packing communicates with the suction inlet of the impeller. If the liquid at the inlet of the impeller is in a vacuum state, it is easy to enter the air along the surface of the sleeve, so the packing ring is filled in the packing chamber Small holes in the pump cover lead the pressure water in the pump chamber to the packing ring for sealing. Pump impeller, such as no balance hole, because the liquid pressure on the back of the impeller is greater than atmospheric pressure, so there is no leakage problem, it can not fill rings. To avoid shaft wear, shaft protection is provided at the shaft through the packing chamber with an O-ring between the shaft sleeve and the shaft to prevent ingress or leakage of water along the mating surfaces. Pump drive by extending the length of flexible coupling with the motor. Pump rotation direction, from the drive end, clockwise rotation. Asia Fluid Network () Editor: Huang Nengwen, QQ: