Design method of hydraulic model of shaftless drive type integrated motor pump jet

A technology that integrates motors and hydraulic models, and is applied to instruments, computing, and electrical digital data processing to achieve the effects of promoting popularization and application, high design quality, and reducing pulsating pressure

Active Publication Date: 2015-03-25
NAVAL UNIV OF ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among the above patents, only the shaftless drive integra...

Method used

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  • Design method of hydraulic model of shaftless drive type integrated motor pump jet
  • Design method of hydraulic model of shaftless drive type integrated motor pump jet
  • Design method of hydraulic model of shaftless drive type integrated motor pump jet

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Embodiment Construction

[0028] Embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals represent like elements.

[0029] Step S1, according to the design requirements, the selection and design of the hydraulic parameters of the pump fluid channel

[0030] According to the speed and power design index, the five hydraulic design parameters of the pump fluid passage formed by the front stator and the rear impeller in the pump jet are determined.

[0031] The effective power is obtained by the product of the hull resistance and the design speed, and then the rated power, rated speed, and reduction ratio of the main engine, and according to the basic theory of water jet propulsion, the head H, flow Q, and outlet area A of the pump fluid channel can be obtained j , Specific speed N s and suction port ratio speed parameter N ss , this process is called the selection design of the hydraulic parameters of the pump fluid channel. Specifical...

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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...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCY02T90/00
Inventor 杨琼方王永生
Owner NAVAL UNIV OF ENG PLA
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