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Single-axle drive type axial flow counter-rotating water-jet propulsion pump

A technology of water jet propulsion and single-shaft drive, which is applied to axial flow pumps, propulsion components, ship propulsion, etc. It can solve the problems of low head, large axial size, and narrow high-efficiency zone, and achieve high head and small axial size , the effect of high-efficiency zone width

Inactive Publication Date: 2018-11-06
JIANGSU UNIV ZHENJIANG RES INST OF FLUID ENG EQUIP TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an axial-flow counter-rotating water jet propulsion pump driven by a single shaft, so as to solve the problems of the existing axial-flow water jet propulsion pump, such as large axial size, low head, narrow high-efficiency zone, etc.

Method used

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  • Single-axle drive type axial flow counter-rotating water-jet propulsion pump
  • Single-axle drive type axial flow counter-rotating water-jet propulsion pump

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Embodiment Construction

[0017] The technical solution of the present invention will be described in more detail below in conjunction with the accompanying drawings.

[0018] like figure 1 As shown, the axial-flow counter-rotating water jet propulsion pump driven by a single shaft of the present invention includes a power source 1, a pump inlet 2, a fixed guide vane 3, a pump outlet 4, a drive shaft 5, a guide cap 6, a front impeller 7 and Rear impeller 8. The water flow enters from the pump inlet 2, and after the work done by the front impeller 7 and the rear impeller 8, it flows through the fixed guide vane 3 and is sprayed out from the pump outlet 4. The rotation directions of the front impeller 7 and the rear impeller 8 are opposite, the transmission shaft 5 is driven by the power source 1, and the rotation of the transmission shaft 5 is the same as that of the front impeller 7 .

[0019] like figure 2 As shown, in the anti-rotation structure of the axial-flow counter-rotating water jet propul...

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Abstract

The invention relates to a single-axle drive type axial flow counter-rotating water-jet propulsion pump. The single-axle drive type axial flow counter-rotating water-jet propulsion pump comprises a power source and a transmission shaft, a fairing cap, front impellers, rear impellers and a fixing guide vane are installed on the transmission shaft in the direction from a pump inlet to a pump outletin sequence, the front impellers are installed on a front impeller hub, the rear impellers are installed on a rear impeller hub, and the fairing cap is fixedly connected with the front impeller hub. Through the front impeller hub, the transmission shaft drives the front impellers to rotate in the direction identical to the rotation direction of the transmission shaft, a cavity is formed in the rear impeller hub, a first transmission bevel gear is installed at the tail end of the transmission shaft and located in the cavity in the rear impeller hub, and through a bevel gear train transmission device in the cavity of the rear impeller hub, the first transmission bevel gear drives the rear impellers to rotate in the direction opposite to the rotation direction of the front impellers. The device is compact in structure, large in flow and high in lift, and the single-axle drive type axial flow counter-rotating water-jet propulsion pump can be suitable for different work environments.

Description

technical field [0001] The invention designs a propulsion pump, in particular relates to an axial-flow counter-rotation water-jet propulsion pump for ships. Background technique [0002] The conventional pump types of water jet propulsion pumps are mixed flow pumps and axial flow pumps. Generally, the axial flow water jet propulsion pump is the most widely used form of water jet propulsion. Due to the large thrust required by the axial flow water jet propulsion pump, the relative flow head is relatively high, and the axial flow pump is a low head pump. The first-stage axial flow pump design has low head and poor anti-cavitation performance, resulting in large noise and vibration. The high-efficiency range of the axial flow pump is very narrow, and severe vibration will occur under low flow conditions. Obviously, single-stage or multi-stage axial flow pumps designed by traditional design methods cannot meet the requirements of modern high-performance ships with good anti-cav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63H11/08F04D3/00
CPCB63H11/08B63H2011/081B63H2011/085F04D3/00
Inventor 李彦军陈超裴吉王文杰吴天澄
Owner JIANGSU UNIV ZHENJIANG RES INST OF FLUID ENG EQUIP TECH