Impeller cover structure of waterjet propulsion device and manufacturing method thereof

A water jet propulsion and impeller cover technology, which is applied in ship propulsion, propulsion components, ship construction, etc., can solve the problems of difficult repair and short service life of the impeller cover, and achieve the effects of avoiding direct contact, prolonging service life and improving efficiency.

Active Publication Date: 2014-11-05
WUHAN MARINE MACHINERY PLANT
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of short service life and difficult repair of the impeller cover existing in t

Method used

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  • Impeller cover structure of waterjet propulsion device and manufacturing method thereof
  • Impeller cover structure of waterjet propulsion device and manufacturing method thereof

Examples

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[0052] Example 1:

[0053] An impeller cover structure of a water jet propulsion device, comprising an impeller cover 1, an impeller 2, an impeller 2 is coaxially arranged in the middle of the impeller cover 1, and the impeller cover 1 includes a casing 3, an insulating bushing 4 and a stainless steel bushing 5. The outer circumferential surface of the stainless steel bushing 5 is press-fitted with the inner circumferential surface of the housing 3 through the insulating bushing 4, the middle of the stainless steel bushing 5 is provided with an impeller 2 coaxially, and the impeller 2 is in contact with the stainless steel The gap between the bushes 5 is 0.5 mm-1 mm; the shell 3 is a cast aluminum part with a tubular structure; the insulating bush 4 is made of high-density polyethylene board, polytetrafluoroethylene board or polymer The thickness of the insulating bushing 4 is 2 mm-3 mm; the stainless steel bushing 5 is rolled from the stainless steel plate, and the thickness of ...

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Abstract

The invention provides an impeller cover structure of a waterjet propulsion device and a manufacturing method thereof. The structure comprises an impeller cover and an impeller, wherein the impeller is coaxially arranged in the middle of the impeller cover, the impeller cover comprises a casing, an insulation bushing and a stainless steel bushing, the outer circumferential surface of the stainless steel bushing is in press fit with the inner circumferential surface of the casing through the insulation bushing, the impeller is coaxially arranged in the middle of the stainless steel bushing, and the value of a gap between the impeller and the stainless steel bushing is from 0.5mm to 1mm. When the structure is manufactured, the insulation bushing and the stainless steel bushing are formed by using a rolling technology, and the insulation bushing is pressed against the inner wall of the casing by utilizing the tension of the stainless steel bushing. The structure has the advantages of easy manufacture and repair, long service life, short repair period and low repair cost. Besides, the electrochemical corrosion can be effectively avoided.

Description

technical field [0001] The invention relates to an impeller cover structure of a water jet propulsion device, in particular to an impeller cover structure of a water jet propulsion device and a manufacturing method thereof. Background technique [0002] In the water jet propulsion device, the impeller is located in the inner cavity of the impeller cover, which is the main working area for the propulsion device to form high-speed water flow. There needs to be a suitable assembly gap between the outer circle of the impeller and the inner diameter of the impeller cover. If the gap is too small, the impeller is in the impeller cover. The rotation will interfere, and the gap is too large, which will affect the efficiency of the water jet propulsion device. When the water jet propulsion device is working, it needs to suck seawater or river water from the inlet pipe, and flow through the impeller and the impeller cover, and the water flow is often mixed with sediment and some sharp...

Claims

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Application Information

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IPC IPC(8): B63H11/02
Inventor 吴少龙程涛程哲韩海辉胡彬彬杜文国李健
Owner WUHAN MARINE MACHINERY PLANT
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