Tandem axial flow type water jet propulsion pump

Abstract

The invention discloses a tandem axial flow type water jet propulsion pump, and relates to the technical field of water jet propulsion, the tandem axial flow type water jet propulsion pump comprises a pump body, a partition plate is fixedly mounted in the pump body, the partition plate divides the interior of the pump body into a first mounting area and a second mounting area, and an end cover is detachably mounted at the top of the pump body through screws; a motor is fixedly mounted in a first mounting area in the pump body, a rotating shaft is arranged in a second mounting area in the pump body, a through hole is formed in the middle of the partition plate, and a mechanical seal is fixedly mounted at the bottom of the partition plate. And the top end of the rotating shaft penetrates through the mechanical seal and the through hole, then enters the first mounting area and is fixedly connected with an output shaft of the motor. By means of the mechanical seal, the sealing effect of the circumferential gap between the rotating shaft and the through hole can be effectively improved, and meanwhile, leakage at the circumferential gap between the rotating shaft and the through hole is avoided in the mode of increasing the air pressure in the first mounting area in the pump body.

Description

technical field [0001] The invention relates to the technical field of water jet propulsion, in particular to a tandem axial flow water jet propulsion pump. Background technique [0002] The water-jet propulsion device is a new type of special power device. Different from the common propeller propulsion method, the thrust of the water-jet propulsion is obtained by the reaction force of the water flow ejected by the propulsion pump, and is distributed through the control rudder and reverse rudder equipment. And change the direction of the jet to realize the manipulation of the ship. It has been applied on medium and high-speed ships such as planing boats, wave piercing boats, hydrofoil boats, and hovercraft. At present, in some water jet propulsion devices, the tandem axial flow pump is used as the core component. The axial flow pump drives the impeller to rotate at high speed through the motor to generate force on the liquid to transport the liquid along the axial direction...

AI Technical Summary

Problems solved by technology

[0003] The existing tandem axial-flow water jet propulsion pump has certain disadvantages in use. The rotating shaft needs to be inserted in the middle of the partition between the motor installation area and the impeller installation area, and there is a circumferential gap between the rotating shaft and the interspersed hole on the partition. , the sealing is difficult, and it is prone to leakage, which seriously affects the safe operation of the motor. Therefore, we propose a tandem axial flow water jet propulsion pump

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