Symmetric double-stage propelling device for ship

Abstract

The invention provides a symmetric double-stage propelling device for a ship, which relates to ship propelling devices. The symmetric double-stage propelling device for the ship comprises a left front engine, a right front engine, a left rear engine, a right rear engine, a left front propeller, a right front propeller, a left rear propeller, a right rear propeller and a square tube-shaped housing. The left front propeller, the right front propeller, the left rear propeller and the right rear propeller are symmetrically mounted within the square tube-shaped housing in pairs. A front angle between the rotating plane of the left front propeller and the rotating plane of the right front propeller is not more than 150 DEG. The rotating planes of the left front propeller, the right front propeller, the left rear propeller and the right rear propeller are all vertical to a top plate and a bottom plate of the square tube-shaped housing. The left front propeller, the right front propeller, the left rear propeller and the right rear propeller rotate under the driving of power so as to suck the water ahead of them into the square tube-shaped housing and then extrude the water from the backside of the square tube-shaped housing. Compared with the traditional ship propeller, the symmetric double-stage propelling device for the ship, provided by the invention, has the advantages of large thrust face, high efficiency and low resistance.

Description

technical field [0001] A symmetrical two-stage propulsion device for ships relates to a ship propulsion device, in particular to a two-stage ship propulsion device. Background technique [0002] The traditional barreled propeller propeller is cylindrical, and the rotation plane of its blades is basically perpendicular to the opening direction of the casing. The cross-sectional area is large and the resistance is relatively large, especially at high speed. Due to the use of a single propeller, the rotation The torque is large and the stability is poor; the traditional two-stage propeller has large resistance, large interference between the two propellers, and low efficiency. Contents of the invention [0003] The purpose of the present invention is to overcome the disadvantages of the above-mentioned prior art, and provide a symmetrical two-stage propulsion device for ships with low resistance and high thrust that cancels out each other. [0004] The technical solution of ...

AI Technical Summary

Problems solved by technology

[0002] The traditional barreled propeller propeller is cylindrical, and the rotation plane of its blades is basically perpendicular to the opening direction of the casing. The cross-sectional area is large and the resistance is relatively large, especially at high speed. Due to the use of a single propeller, the rotation Large button torque and poor stability; traditional two-stage propellers have high resistance, large interference between the two propellers, and low efficiency

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