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 water jet propulsion pump impellers that cannot meet design requirements and low cost requirements at the same time.
Active Publication Date: 2016-05-04
WUHAN MARINE MACHINERY PLANT
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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
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Embodiment
[0084] The embodiment of the present invention provides a method for designing the impeller of a water jet propulsion pump. 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 of the streamline method The steps are as follows:
[0085] Determine the design target parameters of the impeller 1: flow Q=0.76m 3 / s, head H=35m, speed n=2000rpm, mechanical efficiency η m =0.97, volumetric efficiency η v =0.98, total power P=287kW, hub shape and size (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 Figure 6 ), tip inflow angle β o1 =21°, blade width b at blade tip o =0.1485m, blade width b in the middle of the leaf c =0.16m, blade width at blade root b h =0.1716m; ...
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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, in particular to a method for designing an impeller of a water jet propulsion pump. Background technique [0002] At present, the water jet propulsion pump is the core component of a new type of ship propulsion device - water jet propulsion. Advantages beyond conventional propellers, for example, when the speed is higher than 25 knots, the propulsion efficiency of the water jet propulsion can reach more than 60%; The power is small, the work is stable, the noise is low, and the anti-cavitation ability is strong; the power-speed curve of the water jet propulsion is flat, and the power of the main engine can be fully utilized under the changing conditions of the ship. Overload phenomenon occurs; the maneuvering of the boat using the water jet propulsion does not need to change the speed of the main engine, mainly relying on the deflection water jet propulsion pump to spray high-speed water to realize the stee...
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Login to View More 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