Water pump

Abstract

The invention discloses a water pump. The water pump comprises a volute, a pump shell and a bearing seat, wherein the volute, the pump shell and the bearing seat are sequentially connected. A wear-proof pump shaft and a mechanical seal cavity of a reasonable structure are applied to the water pump, and a reasonable locating structure and a reasonable jackscrew structure are designed. In this way, the wear resisting capacity and the corrosion resisting capacity of the water pump are improved; and besides, detachment is convenient, installation and detachment can be simplified, the production cost and the installation cost can be reduced, and the production efficiency and the maintenance efficiency can be improved.

Description

technical field [0001] The invention relates to the technical field of liquid delivery, in particular to a water pump. Background technique [0002] Water pumps are generally composed of motors, pump bodies, pump shafts and impellers, and are widely used in cross-basin water transfer, farmland irrigation, production water supply and drainage and other fields. [0003] In the water pump, the pump shaft is the main part that transmits mechanical energy. The pump shaft extends into the pump body through the pump cover on the pump body. One end of the pump shaft is connected to the motor shaft through a coupling, and the other end supports the impeller to keep it in the working position. Rotational movement. Between the pump shaft and the pump cover, packing and mechanical seals are added to form a sealing structure to ensure the relative negative pressure in the pump body. Due to the high rotation speed of the pump shaft, there is friction between the mechanical seal and othe...

AI Technical Summary

Problems solved by technology

The disadvantage is: due to the many parts of the mechanical seal device, the precision of each mating surface cannot be guaranteed, resulting in a decrease in the sealing performance of the mechanical seal cavity, and the mechanical seal cavity is cylindrical, and the remaining operating space is extremely small during installation. , it is often difficult to operate, causing inconvenient assembly when replacing parts, and if the medium contains particles during use, it is easy to cause friction between the particles and the mechanical seal, resulting in damage to the mechanical seal, which seriously affects the sealing performance of the mechanical seal of the water pump. In severe cases, the liquid pumped by the pump may leak to the pump shaft through the mechanical seal device, affecting the life of the pump shaft and causing liquid corrosion to the bearing body, which has many effects on the maintenance of the entire water pump

[0005] In addition, when the current water pump casing is installed, the connection surface between the pump cover and the volute of the pump, and the connection surface between the pump cover and the bearing seat are all flat surfaces. When the water pump is installed, it is necessary to manually align the volute and the pump cover, the pump Whether the calibration center of the cover and the bearing seat is aligned and then fastened with bolts, such an installation structure makes the installation work cannot be completed by one person alone, and it cannot be guaranteed that the center can be correctly calibrated every time, so as to ensure the installation accuracy of the water pump and ensure the operation of the water pump reliability, waste more manpower in vain, and the efficiency of water pump assembly is low, which is not conducive to industrial mass production of water pumps

[0006] After the water pump works for a long time, the extraction liquid pumped by the water pump will penetrate into the connecting surface of the volute and the pump cover of the water pump, which will cause certain corrosion on the connecting surface after a long time, so that the volute and the pump cover are bonded together , During pump maintenance, the volute and pump cover need to be disassembled to inspect and repair the internal structure. However, because the volute and pump cover are bonded together, it is often difficult to separate, and can only be separated by knocking or using tools. Cause damage to the structure of the water pump and change the accuracy of the water pump, which may affect the normal use of the water pump and make maintenance work inconvenient

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