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Pump water jet propeller vane wheel high in air dissolving performance

A water jet propulsion and dissolved gas technology, which is applied in ship propulsion, propulsion parts, ship parts, etc., can solve the problem of inability to fully utilize the shear force of impeller blades, achieve high-speed effective cruise capability, improve dissolved air capability, and system Stable running effect

Inactive Publication Date: 2015-03-04
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for media with gas-liquid two-phase characteristics, this method of impeller blade arrangement cannot make full use of the shear force formed by the work of the impeller blades.

Method used

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  • Pump water jet propeller vane wheel high in air dissolving performance
  • Pump water jet propeller vane wheel high in air dissolving performance
  • Pump water jet propeller vane wheel high in air dissolving performance

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] Such as figure 1 As shown, a pump water jet propeller impeller with high air-dissolving performance of the present invention includes a first blade group and a second blade group, and the first blade group and the second blade group respectively include two centrally symmetrical blades, The blades are large skewed propeller blades, the cascade density at the blade rim is 0.4, and the angle θ is formed between the first centerline where the first blade group is located and the second centerline where the second blade group is located. The angle θ is not 90°. Such as figure 2 As shown, the numerical calculation results of pressure fluctuations formed by each group of blades (two opposing blades) acting on the upstream fluid, the figure shows that the blades form periodic pressure effects on the fluid (three cycles are shown in the figure), and the maximum The ...

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Abstract

The invention discloses a pump water jet propeller vane wheel high in air dissolving performance. The pump water jet propeller vane wheel high in air dissolving performance comprises a first vane group and a second vane group, wherein each of the first vane group and the second vane group comprises two vanes, centers of the two vanes of each vane group are symmetrical, and an intersection angle theta is formed between a first center line where the first vane group is located and a second center line where the second vane group is located, and not equal to 90 degrees. The pump water jet propeller vane wheel high in air dissolving performance is set in a structure formed by unevenly arranging the vanes in central symmetry mode, non only achieves the purposes of balancing radial force which is equal to 0 and enabling a system to stably run, but also generates the biggest pressure fluctuation (velocity shearing) on the upper stream of the pump water jet propeller vane wheel high in air dissolving performance, and thereby generates a large pressure gradient and the large velocity shearing, and greatly improves air dissolving capacity of a pump water jet propeller. The pump water jet propeller vane wheel high in air dissolving performance can effectively improve gas-liquid two-phase transportation and power capability of the pump water jet propeller, enables a ship to achieve stable, fast and effective cruising capability, and is especially suitable for pump water jet propelling devices of modern high performance ships such as a high speed passenger liner and a skimming boat.

Description

technical field [0001] The invention relates to an impeller used for a marine pump water jet propulsion device, in particular to a pump water jet propeller impeller with high gas-dissolving performance. Background technique [0002] At present, pump water jet propulsion is a new type of ship propulsion device, which is mainly used in modern high-performance ships with surface effect characteristics such as high-speed passenger ships and planing boats. Due to the high speed and splash characteristics of ships with surface effect characteristics, the flow field near the hull usually presents the form of gas-liquid two-phase flow during cruising. Therefore, the gas-liquid two-phase flow delivery capacity of the pump waterjet that draws water from the bottom side of the ship, especially the suction capacity of the impeller to the upstream gas-liquid two-phase fluid, plays a very important role in the stable, high-speed and effective cruising of the ship. [0003] The impellers ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63H11/08
Inventor 倪永燕李冬琴范露
Owner JIANGSU UNIV OF SCI & TECH
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