An axial flow water jet propulsion pump

Abstract

The invention discloses an axial flow water jet propulsion pump. It includes a pump body, the pump body contains a cylindrical middle section, the front end and the rear end of the cylindrical middle section are respectively provided with a rectification spout and an inlet elbow, and an inner bearing seat is arranged in the cylindrical middle section. The inner bearing seat is coaxial with the cylindrical middle section, and guide vanes are connected between the periphery of the inner bearing seat and the inner wall of the cylindrical middle section. A pump shaft is arranged in the pump body, and the front end of the pump shaft passes through the inner bearing seat and protrudes in front of the inner bearing seat, and impellers are arranged on the pump shafts on both sides of the inner bearing seat. The rear end of the pump shaft passes out of the bend of the inlet elbow, and the rear end of the pump shaft is provided with a first outer bearing seat, and the rear end of the pump shaft penetrates into the first outer bearing seat. It is characterized in that a bevel gear is installed on the part of the pump shaft extending beyond the bend to the first outer bearing seat, and the diameter of the front end of the bevel gear is smaller than that of the rear end. The axial flow water jet propulsion pump has simple structure, short axial dimension, light weight and low manufacturing cost. Suitable for installation on ships to propel ships to sail.

Description

technical field [0001] The invention relates to a ship propulsion mechanism. Specifically, it is the axial flow water jet propulsion pump used to propel the ship to sail. Background technique [0002] It is known in the shipbuilding industry that at present, the axial-flow water jet propulsion pump used on ships includes a pump body, which contains a cylindrical middle section, and the front and rear ends of the cylindrical middle section have rectifying nozzles and inlets respectively. A curved cylinder with an inner bearing seat in the cylindrical middle section. The inner bearing seat is coaxial with the cylindrical middle section, and guide vanes are connected between the periphery of the inner bearing seat and the inner wall of the cylindrical middle section. There is a pump shaft in the pump body, the front end of the pump shaft passes through the inner bearing seat and protrudes before the inner bearing seat, and there are impellers on the pump shafts on both sides ...

AI Technical Summary

Problems solved by technology

When it is necessary to use one electric motor to drive two axial flow propulsion pumps at the same time, if the axial input power from the pump shaft is used, a large transfer case or multiple small transfer cases must be equipped, which not only has a complex structure and shaft Longer in size, heavier in weight, and more expensive to manufacture

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