A Design Method of Hydraulic Model of Shaftless Drive Integrated Motor Pump Jet Propeller

Abstract

The invention discloses a design method of a hydraulic model of a shaftless drive type integrated motor pump jet. By means of the method, the propeller which is equal to a seven-blade highly skewed propeller in open water efficiency and lower in radiation noise can be designed, wherein a motor and the pump jet are completely integrated. The method comprises the steps of a pump fluid channel hydraulic parameter type selection design, a parametric three-dimension reversal design of pre-positioned stator and post-positioned impeller blades, non-air-gap pump jet open water performance checking, and propelling, cavitation and noise performance and strength checking of the integrated motor pump jet. The pump jet which is composed of a thick guide pipe of an embedded motor stator, a motor annular rotor, an air gap, a pre-positioned stator and a post-positioned impeller is designed. The propelling efficiency is 0.589, the power is 3.7 MW and the pump jet can propel submersible vehicles with the navigational speed being 16 knots. The number of the stator blades is 13, the number of the impeller blades is 9, an NACA 16 wing type thickness distribution method is adopted for the stator blades and the impeller blades, and the impeller is highly skewed. The design method can be directly used for realizing shaftless electric propelling of unverwater vehicles, and is also suitable for shaft type pump jets and torpedo post-positioned stator type integrated motor pump jets.

Description

technical field

[0001] The invention relates to the technical field of ship propulsion, in particular to a design method of a hydraulic model of an integrated motor pump-jet propulsor which has the characteristics of low noise and high critical speed and can be used to realize electric shaftless propulsion technology of underwater submersibles. Background technique

[0002] The pump jet propeller (Pumpjet, referred to as the pump jet) is a rotary combined hydrodynamic propeller, which consists of an axisymmetric annular duct and rotating and stationary blade cascades inside the duct. The rotating cascade and the stationary cascade are called impeller and stator respectively. The section of the duct is usually airfoil-shaped, and it is generally designed as a deceleration duct, which can decelerate the water flow passing through the impeller blades to delay the generation of cavitation, and improve the cavitation performance and radiation noise performance of the pump injecti...

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