Method for repairing propeller blades of ship

A repair method and technology for propellers, which are applied in the field of maintenance and repair of main parts, can solve problems such as difficulty in repairing propeller blades, and achieve the effect of a simple repair method

Inactive Publication Date: 2018-01-12
南通如港船舶配套机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the existing problems such as propeller blade wear and damage, it is difficult to repair, and the purpose of the present invention is to provide a simple and effective repair method for propeller blade wear and damage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] At the worn part of the leading edge of the propeller blade body, it is surfacing welded by electric welding to form a surfacing area, and then it is repaired to restore the original shape of the blade body by using a portable grinder and manual trimming.

Embodiment 2

[0012] For the missing propeller body, according to the shape of the defect, cast a slightly larger casting with the same material as the propeller, and then match its shape, size and thickness by hand. The corners are then welded by oxy-acetylene manual welding, and finally polished and trimmed by hand to the shape consistent with the original pulp leaf body.

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PUM

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Abstract

The invention discloses a method for repairing propeller blades of a ship, and belongs to the field of maintenance and repair of main parts used on ships. For a worn blade, the worn part of the guideedge of the blade can be subjected to surfacing through gas welding, and the texture of a used welding wire material is required to be the same as the texture of the propeller, and then the surface ofthe surfacing position is polished. For a defective blade caused by being collided with a hard object, a slightly larger piece of casting material having the same texture as that of the propeller canbe cast in advance according to the shape of the defective part, then match working is conducted through a manual method, a suitable weld chamfer needs to be machined at the weld joint, and then manually welded by using oxygen-acetylene; and finally grinding and trimming are conducted so that the use efficiency of the propeller can be recovered. At the same time, the repairing method is simple and practical, and the repaired blade bodies have the same service life as original blade bodies.

Description

technical field [0001] The invention relates to the maintenance and repair of main components used on ships, in particular to a repair method for ship propeller blades. Background technique [0002] The propeller is an important main part of the ship, but the leading edge of the propeller blade will wear out after a long period of use. On the other hand, during operation, the blades may be damaged due to collision with hard objects such as reefs, thereby affecting the propulsion efficiency of the propeller and affecting the safety of the ship after sailing. Once this happens, it can only be used with a new propeller. Contents of the invention [0003] In order to overcome the existing problems such as propeller blade wear and damage, which are difficult to repair, the purpose of the present invention is to provide a simple and effective repair method for propeller blade wear and damage. [0004] The technical solution adopted by the present invention to solve the technic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P6/00
Inventor 许国华
Owner 南通如港船舶配套机械有限公司
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