摘 要

喷水推进做为一种新型的驱动方式，由于科技发展，与普通驱动方式相比，其行驶平稳、具有强抗空泡性能、操作性简便优良、噪音较低、高推进比及低排放等诸多优势受到各方的青睐，众多的机构和公司都在展开对喷水推进系统研发和改良的研究^[1]。将喷水推进系统应用在两栖车上，大大提高了两栖车的隐蔽性和快速性。目前国内外的许多水陆两栖车车型都采用喷水推进代替了传统的螺旋桨推进。因此只有掌握喷水推进系统的设计方法我们才能使我国的两栖车设计和制造事业赶上国际水平，不落后于其他国家。

在第二章中主要介绍了喷水推进的原理以及喷水推进泵的相关知识。阐述了喷水推进的基础理论和喷水推进泵的组成和特性以及各参数之间互相影响的关系，介绍了几种改良喷水推进系统的方法并揭示了喷水推进系统于两栖车车体之间的相互关系。为后面喷水推进泵的选型准备。喷水推进泵是两栖车最直接的动力源，是两栖车在海上能够达到预定行驶速度的保证。

第三章主要介绍了两栖车主机以及两栖车的传动系统。主机是两栖车动力的来源多以柴油机为主。本文先介绍了柴油机的组成以及工作原理然后对柴油机作为两栖车主机的优势做了全面而深入的分析。传动系统部分主要从其原理组成方面展开介绍分析了两种不同的两栖车传动方式的优劣势。

最后，在第四章中根据前面两个部分所介绍的知识，我们对喷水推进系统进行选型和匹配计算。先从两栖车的航速和阻力入手，寻找合适的工况点进性计算，确定该工况下的两栖车阻力，再采用逆推的方法用前文的知识一步步推算出需要选择何种发动机和喷泵。这就完成了对两栖车喷水推进系统的设计。

关键词：喷水推进泵；喷水推进系统；柴油机；传动系统；两栖车

Abstract

Water jet propulsion as a new type of driving method is favored by all parties because of its many advantages such as excellent operation performance, strong anti-cavitation ability, high propulsion efficiency, smooth driving, low noise and environmental protection. All are conducting research on the development and improvement of water jet propulsion systems. The application of the water jet propulsion system to the amphibious vehicle greatly improves the concealment and rapidity of the amphibious vehicle. At present, many domestic and foreign amphibious vehicle models use water jet propulsion instead of traditional propeller propulsion. Therefore, only by mastering the design method of the water jet propulsion system can we make our amphibious vehicle design and manufacturing industry catch up with the international level and not lag behind other countries.

The second chapter mainly introduces the principle of water jet propulsion and related knowledge of water jet propulsion pump. The basic theory of water jet propulsion, the composition and characteristics of the water jet propulsion pump, and the relationship between the various parameters are described. Several methods of improving the water jet propulsion system are introduced and the water jet propulsion system is disclosed in the body of the amphibious vehicle. The relationship between them. Prepared for the selection of the back water propulsion pump. The water jet propulsion pump is the most direct power source of the amphibious vehicle, and it is the guarantee that the amphibious vehicle can reach the predetermined driving speed at sea.

The third chapter mainly introduces the main engine of the amphibious vehicle and the transmission system of the amphibious vehicle。The main engine is the main source of amphibious vehicle power, mainly diesel engines. This article first introduces the composition and working principle of the diesel engine and then makes a comprehensive and in-depth analysis of the advantages of the diesel engine as the host of the amphibious vehicle^[2]. The transmission system part mainly introduces and analyzes the advantages and disadvantages of the two different amphibious vehicle transmission methods from its principle composition.

Finally, in the fourth chapter,based on the knowledge introduced in the previous two parts, we select and match the calculation of the waterjet propulsion system. Start with the speed and resistance of the amphibious vehicle, find the suitable point-in-time calculation of the working condition, determine the resistance of the amphibious vehicle under the working condition, and then use the method of reverse push to use the previous knowledge to step by step to calculate what kind of engine and Spray pump. This completes the design of the waterjet propulsion system of the amphibious vehicle.

Key Words： Water Jet Propulsion Pump；Water Jet Propulsion System；Diesel Engine；Drive System；Amphibious Vehicle

目 录

1. 绪论...................................................................................................................................1

1.1国内外研究现状....................................................................................................................1

1.2研究内容............................................................................................................................2

1. 喷水推进系统..................................................................................................................3

2.1 喷水推进基本理论..............................................................................................................3

2.2 喷水推进泵.........................................................................................................................7

2.3 喷水推进系统..................................................................................................................11

2.4 小结.......................................................................................................................13

1. 两栖车主机推进系统设计........................................................14

3.1 两栖车主机推进系统设计要求........................................................................................14

3.2 柴油机相关介绍..................................................................................................14

3.3 传动系统........................................................................................................17

3.4 小结............................................................................................................................20

1. 喷水推进系统的动力匹配计算.........................................................................21

4.1 动力匹配计算流程.................................................................................................21

4.2 两栖车基本参数及阻力..................................................................................................22