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A design method of water jet propulsion pump impeller

A technology of water jet propulsion and design method, which is applied to the components, pumps, pump elements and other directions of pumping devices for elastic fluids, and can solve the problems of low cost requirements and the impeller of water jet propulsion pump cannot meet the design requirements at the same time.

Active Publication Date: 2018-01-05
WUHAN MARINE MACHINERY PLANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem that the existing water jet propulsion pump impeller cannot meet the design requirements and low cost requirements at the same time at high speed, the embodiment of the present invention provides a design method of the water jet propulsion pump impeller

Method used

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  • A design method of water jet propulsion pump impeller
  • A design method of water jet propulsion pump impeller
  • A design method of water jet propulsion pump impeller

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Embodiment

[0085] The embodiment of the present invention provides a design method for a water jet propulsion pump impeller, the impeller 1 adopts an axial flow structure, the impeller 1 adopts the hydraulic design method of the streamline method, and the hydraulic design method adopts the streamline method The steps are as follows:

[0086] Determine the design target parameters of the impeller 1: flow rate Q=0.76m 3 / s, head H=35m, rotational speed n=2000rpm, mechanical efficiency η m =0.97, volumetric efficiency η v =0.98, total power P=287kW, shape and size of hub (including length L1=10mm, length L2=75.5mm, length L3=43.5mm, hub thickness Th=17.5mm, hub inlet radius Rhi=38mm, outlet radius Rho= 98.5mm, inner hole radius R1=25mm, inner hole radius R2=40mm, taper angle θ=17deg, taper angle γ=6deg, hub length Lh=200mm, see Image 6 ), tip inflow angle β o1 = 21°, blade width b at the tip o =0.1485m, blade width b at the middle of the leaf c =0.16m, the blade width b at the blade ...

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Abstract

The invention discloses a design method of a water-jet propulsion pump impeller. The impeller adopts an axial flow structure, and adopts a streamline hydraulic design method; and the method comprises the following steps: target design parameters of the impeller are determined; an inflow angle beta c1 at the middle part of the impeller, an inflow angle beta h1 at the root part of the impeller, an outlet angle beta o2 at the top of the impeller, an outlet angle beta c2 at the middle part of the impeller and an outlet angle beta h2 at the root part of the impeller are calculated; a lines plan of a blade at the top of the impeller, a lines plan of a blade at the middle part of the impeller and a lines plan of a blade at the root part of the impeller are drawn; a three-dimensional diagram of single blade is drawn; a three-dimensional diagram of a hub is drawn; the three-dimensional diagram of single blade and the three-dimensional diagram of the hub are merged according to the space corresponding relation to obtain an impeller three-dimensional diagram of single blade; and other blades are replenished on the impeller three-dimensional diagram of single blade to obtain a complete impeller three-dimensional diagram to finish the design. The design method is suitable for designing the water-jet propulsion pump impeller.

Description

technical field [0001] The invention belongs to the field of ships, and in particular relates to a design method of an impeller of a water jet propulsion pump. Background technique [0002] At present, the water jet propulsion pump belongs to the core component of the new type of ship propulsion device, the water jet propulsion device. The advantages that conventional propellers cannot achieve. For example, when the speed is higher than 25 knots, the propulsion efficiency of the water jet is more than 60%; Small force, stable operation, low noise, and strong anti-cavitation capability; the power-speed curve of the water jet propulsion is flat, and the power of the main engine can be fully utilized in the case of changing ship conditions, and the ability to adapt to changing conditions is strong, and the main engine is not easy to operate. Overload phenomenon occurs; the steering of the boat with water jet propulsion does not need to change the speed of the main engine, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/22F04D29/24
CPCF04D29/2216F04D29/242
Inventor 胡彬彬李健程哲杜文国韩海辉吴少龙
Owner WUHAN MARINE MACHINERY PLANT