Marine low-vibration low-noise vertical self-priming centrifugal pump

Abstract

The invention discloses a marine low-vibration low-noise vertical self-priming centrifugal pump which comprises a pump shell. Inner sleeves A are arranged at the two sides of the top of a base, a motor is arranged on the top of the pump shell, a water pumping bin is arranged at the bottom of the pump shell, and a water inlet bin is arranged at the bottom of the water pumping bin; and one side of the water inlet bin is provided with a water inlet filtering assembly which is communicated with the water inlet bin, and the output end of the motor is provided with a motor shaft, a coupler and a pump shaft. According to the marine low-vibration low-noise vertical self-priming centrifugal pump, through mutual cooperation of the water inlet bin, an impeller, the coupler, the motor, a vapor-liquid separator, a flow guide pipe, the water pumping bin, a circulating pipe, the motor shaft and the pump shaft, vapor and liquid are separated through the vapor-liquid separator, internal circulation is changed into external circulation, the backflow trend of the device is changed, backflow liquid is prevented from colliding with inlet liquid, the problems that noise is large and vibration is strong when a transmission pump operates are solved, and operation is more stable compared with a traditional pump.

Description

technical field [0001] The invention relates to the technical field of centrifugal pumps, in particular to a marine vertical self-priming centrifugal pump with low vibration and low noise. Background technique [0002] Marine pumps refer to all kinds of pumps used by ships that meet the requirements of ship regulations and marine technical conditions. Generally, pumps must be used in places with high heights, long distances, and high pressure. The pump can also be used to generate high-pressure liquid for hydraulic transmission. The pump is driven by an electric motor or other prime mover. When pumping, cavitation cannot occur due to fluctuations in the suction liquid level. In order to reduce the occupied area of ​​the pump and facilitate maintenance, a vertical structure is generally adopted. [0003] The traditional pump uses a large water tank to circulate water in the device. When the water circulates, it will collide with the incoming liquid and impact the impeller at...

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Problems solved by technology

[0003] The traditional pump uses a large water tank to circulate water in the device. When the water circulates, it will collide with the incoming liquid and impact the impeller at the same time, resulting in loud noise and strong vibration when the device is in use, increasing the operating load of the device; When the existing devices pump the river water and seawater, most of them cannot directly filter the impurities in the water. The impurities in the water will enter the pump and will impact the impeller, which will accelerate the damage of the impeller material, increase the power consumption of the pump body, and increase the power consumption of the device. noise; when the hull is sailing, there will always be some swaying and tilting of the hull. When the hull swings, it will cause the device to sway, which will increase the load on the rotating shaft and bearing of the device. When the swaying range is large, it may cause The device is damaged. The existing device is usually directly fixed on the hull, which cannot provide a good buffer for the pump body and increases the probability of damage to the device.

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