To validate fault diagnosis method using data fusion integrated ann and evidence theory in pump fault diagnosis , this paper analyzes the common fault mechanism of piston pump , brings forward diagnosis domain , gives diagnosis 为了验证神经网络和证据理论集成的数据融合诊断方法用于液压泵诊断的有效性，本文分析了柱塞泵常见故障机理，提出了液压泵的诊断域，建立了诊断的模型，并对诊断网络的结构进行了构造。
Owing to the cylindrical surface of piston and jar hole , radial piston pump can be assembled accurately . compared with the axial piston pump , the radial piston pump is better against impact , moreover , it has longer life , higher cubage efficiency and higher control precision 由于径向柱塞泵具有柱塞与缸体内孔均为圆柱面，易达到高精度的配合等结构特点，因此，比轴向柱塞泵耐冲击、寿命长、容积效率高、控制精度高。
As a main participator in the design for and research on engineering the control system , in the project of eliminating ash with water in jianbi power plant , the author emphasized on the intelligent fault diagnosis for the complex hydraulic system by the background of that project in this paper 本论文以作者参与的谏壁发电厂湿除灰控制系统的设计研究为工程背景，以柱塞泵为主要实践对象，研究复杂液压系统泄漏故障的智能诊断问题。
Kinematics of the axial piston pump with swash plate yoke ' s angle were analysed . there was a lot of analysis about relative movement between piston and cylinder block , between piston and swash plate , between slipper and swash plate . at same time , the movement simulation curves were given 对轴向柱塞泵进行运动学分析，重点是对柱塞与缸体之间，柱塞与斜盘之间以及滑靴与斜盘之间的相对运动进行分析，并且分别给出了仿真曲线； 2
The intelligent fault diagnosis based on bp ann is designed for recognition of leakage fault of a rolling piston radial pump . it combines with the predominance of diagnosis methods based on mathematic model and artificial intelligence , and it is achieved through software on personal computer 对柱塞泵泄漏故障诊断，设计了基于反向传播神经网络的智能诊断系统，综合了基于数学模型和非模型的诊断方法的优点，用软件的方法在个人机上得以实现。
Complete air piston pump contains pneumatic motor and piston pump , the ratio of piston area of pneumatic motor and plunger ' s sectional area of piston pump is transforming times of pump pressure ; the higher times , the more pressure can deliver higher viscosity fluid , and achieve the delivery aim 完整的气动柱塞泵包含有气动马达与柱塞泵两部分，气动马达中的活塞面积与柱塞泵活塞的截面积比值，就是泵压力转换的倍数；愈高的倍数就能以愈大的压力输送愈高黏度的流体，达到输送的目标。
According to the characteristics of the piston pump when it works with the diesel engine , the different outer load leads to different rotational speed and mechanics characteristics of the piston . in order to learn the property of the movement and mechanics of the piston but not experimentalize , simulink which is the simulation toolbox of matlab ( the most popular large - scale mathematic software ) is carried out to simulate the process of the movement and the receiving force of the piston 根据发动机和全功率轴向柱塞泵的工作特性，柱塞泵在受到的外负载不同时，柱塞的转速和受力情况就不一样，为了能在不做实验的情况下就能了解柱塞的运动特性和受力特点，利用现在最为流行的大型数学软件matlab的仿真工具箱simulink对其进行了运动和受力的仿真分析。
The economic success of wepuko hydraulik gmbh co pumpen kompressorenfabrik is coined / shaped by products and service services such as radial piston pumps , piston pumps , descaling plants in addition to three - piston pump , accumulator systems and fluid technology . one can even receive offers on hydraulically , injection pumps , fluid pumps and process pumps as well as on cables and connections with wepuko hydraulik gmbh co pumpen kompressorenfabrik in outstanding quality Wepuko hydraulik gmbh co pumpen kompressorenfabrik是一家可靠的、知名的生产商和服务商，该公司提供很多令人震惊的产品，例如除鳞设备、去铁皮设备,活塞泵,径向柱塞泵、旋转活塞泵,液压的,液体泵,加工泵,流体技术,连接技术。
This task will be foundation to develop a new type hydrostatic transmission piston pumps with high efficiency , long life , high pressure and high speed , which combined the item of nature science fund of zhejiang province , tribology study on sealing , hydrostatic support and piston on hydrostatic transmission piston pump . in this paper , a new design idea of the ball friction coupling based on hydrostatic bearing was given , and analysis was carried out to the static state properties and the dynamic properties of the oil - film of this friction pair 本课题是结合浙江省自然科学基金项目“静压传动柱塞泵的密封、静压支承和柱塞的摩擦学研究” ( 501073 ) ，为研发高效率、长寿命、高速、高压静压传动柱塞泵提供一定的理论基础，着重研究了滑靴副和球铰副的动静态特性，提出了基于静压支承的球铰副设计原理。
The adoption of the variable pump is a breakthrough of the water cutting jet which solved the previously problems in suing the home - made products , such as piston pump filling - up , noise , high - consumption of energy , high oil temperature , lowering of piston pump pressure at the beginning of the work which would effect the starting point and the longevity of the high pressure components will be affected by the changes of pressure 采用变量泵是水刀的技术突破，以前用国内柱塞泵，噪音大、不节能、油温高，柱塞泵在开始工作时压力会降低，这样会影响切入点效果，高压部件会受到压力的变化而影响高压部件的使用寿命。
