Vertical centrifugal pump unit with noise reduction function and low vibration level

Abstract

The invention discloses a vertical centrifugal pump unit with a noise reduction function and a low vibration level. The vertical centrifugal pump unit comprises a pump, an impeller, a bracket, a motor and a shaft seal. The pump is of a vertical structure, the impeller is arranged in a flow channel of an inner cavity of the pump, an upward opening of the pump body is connected to the lower side of the bottom surface of the bracket, the motor is connected to the upper end surface of the bracket in a positioned manner, and a downward extending shaft of the motor penetrates the bracket and then is connected with the shaft seal and the impeller in a positioned manner. A water inlet is formed in a side surface of an output shaft seat of the motor, a water outlet is formed in a side surface of the shaft seat and is positioned at the other end of the motor, and the water inlet and the water outlet are communicated with each other in the motor to form an inner water cooling structure. The vertical centrifugal pump unit has the advantages that the vertical centrifugal pump unit is designed for meeting running matching requirements of manned deep diving devices at special working conditions, the pump, the impeller, the bracket and the motor are structurally optimally designed on the premise that the hydraulic performance of the pump unit is guaranteed, mechanical and hydraulic vibration sources of the pump unit can be weakened, and accordingly the purpose of reducing vibration and noise can be achieved.

Description

technical field [0001] The invention relates to a hydraulic machine, in particular to a motor-driven vertical single-stage single-suction centrifugal pump, in particular to a noise-reducing and low-vibration vertical centrifugal pump set. Background technique [0002] With the advancement of the national marine strategic plan, relevant deep-sea technology research topics have been included in the national scientific research project plan. As we all know, the seabed is rich in resources. If human beings seek seabed resources, it is necessary to conduct exploratory technical research, and seabed operations must use manned deep-diving devices to send researchers to target waters. The manned deep submersible device is a miniature sealed carrier with highly integrated scientific research equipment. Its internal space is very narrow and the distance between man and machine is very small, so it has quite high technical requirements for the performance of supporting equipment. Cent...

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Problems solved by technology

[0003] The invention mainly aims at the problem that the manned deep submersible device has limitations on the vibration and noise of the loaded centrifugal pump, and proposes a noise-reducing low-vibration level vertical centrifugal pump set. The pump set is designed through structural optimization to enhance the rigidity of parts and improve Pump channel structure to achieve the purpose of vibration reduction and noise reduction

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