螺旋桨作为船艇推进装置的重要组成部分，其工作可靠性直接影响船艇的航行安全。针对船艇在沿海和内河水域航行时螺旋桨常被渔网、水草、绳索等带状物缠绕的问题，结合某型船艇推进系统的结构特征，利用剪切和齿割相结合的设计方法，设计船艇螺旋桨防缠绕装置，实现对缠绕物的两级切割，有效避免螺旋桨卡死停转、主机停机、船艇失去动力等故障发生，从而改善螺旋桨工作效率，降低维修成本和船艇人员的工作强度，提高船艇装备完好率以及确保船艇安全，对国民经济发展和国防安全具有重要意义。
As an important part of the ship`s propelling device, the working reliability of propelling directly affects the ship′s navigation safety. In view of the problem that the propeller is often entangled by fishing net, water grass, rope and so on when ships navigate in coastal and inland waters, combined with the structural features of a watercraft propulsion system, the Anti-twisting device of watercraft propeller was designed using the combination design method of shear and tooth cutting. Which can accomplish two-stage cutting of the twine and effectively avoid the failures, such as propeller stuck and stopped, the main engine stopped, the boat lost power and so on. At the same time, this anti-twisting device can also improve the working efficiency of propeller, reduce the working intensity of boat crew and maintenance cost, improve the intact rate of boat equipment and ensure the safety of boat, so it is of great significance to the development of national economy and national defense security.
2020,42(11): 170-173 收稿日期：2019-12-26
DOI：10.3404/j.issn.1672-7649.2020.11.035
分类号：U662.2
基金项目：军队院校重点学科条件建设资助项目(JJXY2019207)；江苏省博士研究生创新基金项目(CXZZ11_0562)
作者简介：宁海强(1980-)，男，博士，副教授，主要研究方向为舰船机械维修与装备保障技术
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