A kind of submarine ship forward tubular propeller technology

Abstract

A forward cross-flow propeller technology for submarine ships, especially the installation of a cross-flow drill propeller at the front of the submarine (ship), the three-dimensional super-side arc of the rotor blade is 30°-720° and the blade height and blade width , blade pitch gradual change through the paddle wheel mother shell and the rotor wheel body as a whole, the "ellipsoidal crown body" with super strong stress and rigid body, the rotor structure of the dynamic balance rotating outer profile, the cavitation disk arm of the stator through-flow tube is formed by umbrella-shaped injection The ultra-low (negative) pressure semi-ellipsoid super-supercavitation area around the submarine ship may be filled with rubber carbon fiber airbags to eliminate most of the wave-making resistance of conventional ships and form submarine ships (especially submarines) to sail at super speed And the energy-saving and overspeeding propeller technology and "drill bit effect" working principle of the submarine ship of energy-saving most tractive power.

Description

technical field [0001] The present invention relates to a kind of technology of forward cross-flow propeller of submarine ship, especially the installation of cross-flow drill bit propeller on the front part of submarine (ship), the three-dimensional super-side arc inclination of the rotor blade is 30°~720° and the height of the blade is , blade width, and blade pitch gradually change through the paddle wheel mother shell and the rotor body as a whole. The "ellipse crown body" of super-stressed rigid body is a rotor structure with dynamic balance and rotating outline. The stator through-flow tube cavitation disc arm is surrounded by umbrella The ultra-low (negative) pressure semi-ellipsoid super-supercavitation area around the submarine is generated by jet-shaped jets, or filled with rubber carbon fiber airbags to eliminate most of the wave-making resistance of conventional ships and form submarines (especially submarines) ) The energy-saving and super-speed propeller technolo...

AI Technical Summary

Problems solved by technology

Since the propellers are all installed at the stern of the boat, its speed will be limited by the low pressure generated by the propellers absorbing water, which is lower than the saturation pressure of seawater, and will cause cavitation effects, making it unable to increase the speed again.

This kind of cavitation effect will not only distort the water flow, but also cause the blades to idling, vibrate and impact, reduce the propulsion efficiency of the blades, and also have problems such as strong shock waves and corrosion on the surface of the blades; looking at the current status of ship technology, even It is a supercavitation torpedo successfully developed by adopting the supercavitation principle of the pump jet propeller. The maximum theoretical speed of the submarine of the conventional submarine with water jet magnetohydrodynamic power is only 150 knots, and the actual speed is only 100 knots)

For conventional submarines, what is more serious is the cavitation phenomenon of the propeller during navigation. When the partial pressure at the inlet of the blade drops to the saturation pressure corresponding to the water temperature, the water begins to vaporize and produce many bubbles. When the bubble is brought into the high-pressure area of ​​the paddle wheel, the steam in the bubble is pressurized and condenses sharply, so the surrounding liquid rushes to the space originally occupied by the bubble at a very high speed, resulting in a strong shock thousands of times per second. Every time there is a gigapa-level water impact, the blades of any material cannot withstand the damage of the blades-if the problem of air bubbles between the blades cannot be completely eliminated, there will be no possibility of further speeding up the ship... ...and of course the resulting wake and noise give away the sub's position even more

On the other hand, the efficiency is low, that is, in the process of the propeller generating thrust with the pressure difference between the front and rear of the propeller, the negative pressure of the stern cabin must be partially offset by the negative pressure of the stern cabin in the ultra-low pressure water area between the stern and the front of the propeller. power (if the flatness of the stern bulkhead is sufficient), the power cancellation rate will be inversely proportional to the distance between the propeller and the plane of the stern bulkhead and the value of the radius of rotation of the blade; To overcome the huge tangential resistance at the front of the ship and the viscous resistance at the rear of the hull that doubles greatly with the increase of speed... It is this "triple resistance" that makes the "Nimi" propelled by a propeller with nearly 300,000 horsepower The Zeus-class aircraft carrier has a maximum speed of less than 40 knots", "The 'Trafalgar' class is the third generation of British attack nuclear submarines, with a total power of 1.5 horsepower jet propulsion, and the maximum underwater speed is only 32 knots", "Russia's With the birth of the 'Alpha' class nuclear-powered attack submarine, the world's largest underwater speed is only 45 knots. The reason for the low speed is largely related to the rear propeller and the "triple resistance" that increases with the design speed. The trend of geometric multiplication is due to the speed limit. It can be said that the waste rate of more than 50% of the energy consumed by the world's nautical ships and 80-90% of the energy consumed by sailing at the limit speed become ineffective and the reason why it is impossible to further break through the limit speed , are all caused by the problems of "rear propeller" and "triple resistance" and can no longer find an optimal design space!

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