An aluminum mixed-flow water jet propulsion device impeller housing

Abstract

The invention discloses an aluminum mixed-flow water jet propulsion device impeller shell, which comprises: a square plate; a conical tube, one end of the conical tube having a smaller diameter is welded to the square plate, and the conical tube includes an inner layer of the conical tube and an outer layer of the conical tube , the material of the inner layer of the conical tube is stainless steel, the material of the outer layer of the conical tube is aluminum alloy, the conical tube is rolled and pressed into a cone by steel-aluminum explosive composite plate and then welded, wherein the outer layers of the conical tube are welded, and the inner layer of the conical tube is welded. Inter-welding; circular flange, the larger diameter end of the tapered tube is welded to the circular flange. The invention adopts the steel-aluminum explosive composite plate rolled into a cone and then welded and formed, which not only solves the problem that the impeller blade is slightly mixed with hard impurities and scratches the impeller shell, but also solves the electrochemical corrosion caused by the use of dissimilar materials for adjacent aluminum parts problems, thereby improving the reliability and life of the mixed-flow aluminum water jet propulsion device.

Description

technical field [0001] The invention relates to the technical field of impeller casings, in particular to an aluminum mixed-flow water jet propulsion device impeller casing. Background technique [0002] Waterjet propulsion is a propulsion method that is mostly suitable for high-speed ships. It has the advantages of high propulsion efficiency at high speeds, good maneuverability, strong ability to change working conditions, low noise, and good shallow water effect. Considering the impact of displacement on resistance, small tonnage speedboats usually use lighter aluminum water jet propulsion devices, while high speed boats usually use mixed flow water jet propulsion devices. Most of the parts of the aluminum mixed-flow water jet propulsion device are made of aluminum alloy, such as guide vane body, impeller shell, inlet flow channel, etc.; the impeller and shaft are usually made of stainless steel. [0003] When the ship is sailing, the impeller rotates at a high speed in t...

AI Technical Summary

Problems solved by technology

This process can be applied to the impeller shell of the axial flow water jet propulsion device, but not suitable for the conical mixed flow water jet propulsion device impeller shell

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