Novel high-pressure water sealing pump

Abstract

The invention discloses a novel high-pressure water sealing pump. The novel high-pressure water sealing pump comprises a pump body and a pump cover, wherein the peripheries of the pump body and the pump cover are fixedly connected, a pump inlet and a pump outlet are formed in the pump body, two bearing bodies extend out of the two ends of the pump body correspondingly, a pump shaft penetrates through the bearing bodies, and bearings are arranged between the pump shaft and the bearing bodies; a first-stage impeller, a second-stage impeller, a third-stage impeller and a fourth-stage impeller aresequentially fixed to the pump shaft, a first division wall, a second division wall and an intermediate division wall extend out of the interiors of the pump body and the pump cover, and the first division wall is located between the first-stage impeller and the second-stage impeller; and the second division wall is located between the third-stage impeller and the fourth-stage impeller, the intermediate division wall is located between the second-stage impeller and the third-stage impeller, an intermediate stand column bolt is arranged at the intermediate division wall, and the intermediate stand column bolt penetrates through the pump body and the pump cover. According to the novel high-pressure water sealing pump, the first-stage impeller, the second-stage impeller, the third-stage impeller and the fourth-stage impeller are arranged, the structure is reliable, the airtightness is good, and the service life is long.

Description

technical field [0001] The invention relates to the technical field of water pumps, in particular to sealed water pumps. Background technique [0002] In my country's beach dredging industry, dredgers are widely used for channel dredging, sea blowing, port construction and other projects, and water sealing pumps are key equipment on dredgers. The water seal pump is used to seal water for the shaft seal of the mud pump to prevent mud and sand from entering the shaft seal of the mud pump and protect the normal operation of the mud pump. Whether the sealing water pump can run safely and reliably is directly related to the construction progress and the life of the mud pump. Existing sealing water pumps are generally divided into high-pressure sealing water pumps and low-pressure sealing water pumps. The high-pressure sealing water pump has a high flow rate and a large diameter of the impeller, resulting in an increase in the volume of the shell. Under the same pressure, the cro...

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Problems solved by technology

In addition, due to the small flow rate and high pressure of the sealed water pump, when the pump head is high, the single-stage pump cannot meet the requirements, and multiple impellers need to be designed to meet the requirements. The impellers need to be installed in series, resulting in large axial force and easy damage to the bearings. Resulting in low pump life

Moreover, a sealing member is provided between the partition wall and the main shaft sleeve in the existing sealed water pump structure, and the sealing member adopts a metal ring sealing structure. gap, and because there is a certain pressure difference between the chambers, the setting of the gap is bound to cause leakage. When the pump is first shipped from the factory, the gap value is within a reasonable range. When the liquid is liquid, the gap value will become larger and larger, and when the gap value reaches a certain level, it will affect the displacement of the pump.

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