Protection device and method for controllable-pitch propeller blade root bolt

A technology of protective device and controllable pitch propeller, which is applied in the directions of rotating propeller, transportation and packaging, rotary propeller, etc., can solve the problems affecting the disassembly of blade root bolts, easy to fall off, etc., achieve good insulation and corrosion resistance, reduce The effect of chemical corrosion and easy disassembly and assembly

Pending Publication Date: 2020-06-09
中国船舶重工集团公司第七0四研究所
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using quick-drying cement to cover the blade root bolts cannot avoid the contact between the head of the blade root bolts and the seawater, and the quick-drying cement is easy to fall off. The blade root bolts are exposed to the marine environment for a long time, and there are chemical corrosion, electrochemical corrosion and hydrogen corrosion. The risk of brittle fracture; and the use of epoxy resin to coat the blade root bolts can prevent t

Method used

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  • Protection device and method for controllable-pitch propeller blade root bolt
  • Protection device and method for controllable-pitch propeller blade root bolt
  • Protection device and method for controllable-pitch propeller blade root bolt

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[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] like Figure 1 to Figure 3 As shown, a protective device for a pitch-adjustable blade root bolt includes a blade flange 5, a blade root bolt 2, the blade 3 is connected to the crank disc 4 through the blade flange 5, and the blade flange 5 and the crank disc 4 are connected by a plurality of The blade root bolt 2 is fixedly connected, wherein the annular space formed between the head of the blade root bolt 2 and the mounting hole of the blade flange 5 is filled with a composite coating containing epoxy resin, that is, the blade root bolt protective agent 1 . When the blade root bolt needs to be disassembled, it shall be dismantled by manual knocking.

[0017] A protection method for a blade root bolt of a pitch-adjustable propeller, comprising the following steps:

[0018] Step 1: Prepare blade root bolt protectant 1

[0019] Epoxy resin, curing...

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Abstract

The invention relates to a protection device and method for a controllable-pitch propeller blade root bolt. An annular space formed between the head of a blade root bolt and a mounting hole of a bladeflange is filled with a blade root bolt protective agent for guaranteeing the external line type of a blade, external foreign matters can be prevented from entering the annular space area, and a protective layer is formed outside the blade root bolt. The annular space formed by the blade root bolt and the blade flange mounting hole is filled with the blade root bolt protective agent, the externalline type of the blade is guaranteed, external foreign matters are prevented from entering the area, and the protective layer is formed outside the blade root bolt. The protective layer has good insulativity and corrosion resistance, and can effectively reduce the risks of chemical corrosion, electrochemical corrosion and hydrogen embrittlement fracture of the blade root bolt to a certain extent.And meanwhile, while isolating a circular truncated cone at the head of the blade root bolt from seawater, the protection device can be dismounted in a manual knocking mode, and repeated disassemblyand assembly of the blade root bolt are facilitated.

Description

technical field [0001] The invention relates to a ship's controllable pitch propeller device, in particular to a controllable pitch propeller blade root bolt in the ship's controllable pitch propeller device. Background technique [0002] The blade root bolt is one of the important parts of the controllable pitch propeller device. It is used to connect the blade and the crank plate of the hub. It needs to ensure long-term reliable operation under complex underwater loads. Therefore, the necessary protective measures for the blade root bolts are very important. The blade root bolts are located in the mounting holes of the blade flange. During installation, after tightening the individual blade root bolts one by one and taking anti-loosening measures, the current commonly used method is to fill the annular space formed by the blade root bolts and the blade flange mounting holes. Quick-drying cement or epoxy resin to keep the outer line of the blade smooth, improve the hydrody...

Claims

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Application Information

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IPC IPC(8): B63H3/00B63H1/20
CPCB63H1/20B63H3/00
Inventor 施睿贇王国亮常龙张玮炜张金斗李晓峰
Owner 中国船舶重工集团公司第七0四研究所
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