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Horizontal single stage centrifugal pump of SVW tpye
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Horizontal single stage centrifugal pump of SVW tpye
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Horizontal single stage centrifugal pump of SVW tpye
1. Generally, the inner cavity of the volute pump housing is a spiral liquid channel, which is used to collect the liquid thrown from the impeller and guide the diffusion tube to the pump outlet.The pump housing bears all working pressure and the heat load of the liquid.2. The impeller is the only work component, and the pump works on the liquid through the impeller.There are three types of impeller, closed, open and half open.The closed impeller is composed of blade, front cover plate and rear cover plate.The semi-open impeller consists of a blade and a rear cover plate.Open impeller is only blade, no front rear cover plate.Closed impeller is more efficient and open impeller is less efficient.3. The function of the sealing ring is to prevent the internal and external leakage of the pump. The sealing ring made of wear-resistant materials is embedded in the cover plate before and after the impeller and the pump shell.4. Fix the impeller on one end of the pump shaft and install the coupling on the other end.According to the size of the pump, the bearings can be selected rolling bearings and sliding bearings.5. There are mechanical seal and packing seal.General pumps are designed to both fill and mechanical seals.
1. According to the performance and size specified in international standards, it is mainly composed of pump body, pump cover, impeller, shaft, sealing ring, sleeve and suspension bearing, etc.2. The pump body and the pump cover are divided from the back of the impeller, which is commonly referred to as the rear door structure.The advantages are easy maintenance. During maintenance, the pump body, suction pipe, discharge pipe and motor are not moved. Only remove the intermediate coupling of the lengthened coupling, and the rotor can be removed for maintenance.3. The pump shell (that is, the pump body and the pump cover) constitutes the pump studio.The impeller, shaft and rolling bearing are the pump rotors.The suspension bearing component supports the rotor of the pump. The rolling bearing is subject to the radial and axial forces of the pump.4. In order to balance the axial force of the pump, the front and back of the impeller of most pumps are provided with sealing ring, and the balance hole is provided on the rear cover plate of the impeller.5. The pump's axial sealing ring is composed of packing gland, packing ring and packing, etc. to prevent air intake or large amount of water leakage.If the impeller of the pump is balanced, the cavity with soft packing is connected to the inlet of the impeller. If the liquid at the inlet of the impeller is in a vacuum state, the air can easily enter along the surface of the sleeve.If the impeller of the pump has no balance hole, because the liquid pressure on the back of the impeller is greater than atmospheric pressure, there is no air leakage problem, so packing ring is not required.6. In order to avoid shaft wear, a shaft sleeve is installed at the part where the shaft passes through the packing chamber.An o-ring is provided between the shaft sleeve and the shaft to prevent air intake or leakage along the mating surface.7. The drive mode of the pump is connected with the motor by lengthening the elastic coupling. The rotation direction of the pump is clockwise from the driving end.