Hydraulic Steering Gear Research Articles

EMD技术在船舶液压设备故障诊断中的应用研究

本文在分析传统液压设备故障诊断技术及信号处理方法在船舶液压系统故障诊断方面存在不足的基础上，论述了振动分析在船舶液压系统故障诊断领域应用的可行性及前景，分析了经验模态分解(EMD)技术在处理非平稳信号方面的工程应用优势；分别以经验模态分解算法和径向基函数网络为基础，结合船舶液压系统应用实际，构建了船舶液压系统振动信号特征向量提取模型和故障诊断模型；最后以某型船艇装备液压舵机系统实测数据为基础，对构建的特征向量提取模型和故障诊断模型进行了验证。 Based on the analysis of the shortcomings of the traditional hydraulic equipment fault diagnosis technology and signal processing signal processing methods in the field of marine hydraulic system fault diagnosis, the feasibility and prospect of vibration analysis method in the field of marine hy-draulic system fault diagnosis are discussed, the advantages of EMD in dealing with non-stationary signals are analyzed. On the basis of EMD and RBF network, combined with the application of ma-rine hydraulic system, the vibration signal characteristic vector extraction model and fault diagno-sis model of marine hydraulic system are constructed. Finally, the model of characteristic vector extraction and fault diagnosis model are validated on the basis of measured data of hydraulic steering gear equipped with a certain type of watercraft.

The Optimized Analysis of Recirculating-Ball Hydraulic Power Steering Gear Based on Orthogonal Experiment

To optimized the structure parameters of steering gear assembled in low speed truck,an orthogonal experiment is designed within rang of variation of the structure parameters,under the guide of vehicle handing and stability comprehensive evaluation indexes.One optimum parameter group is obtained by analyzing the influence of structure parameters on evaluation indexes based on the simulation of the established and verified model of the truck steering system.The optimum parameters group is demonstrated can be benefit to the vehicle handing and stability through contrasting the original structure parameters,and achieving the objective of power steering gear structure parameters optimized analysis.

The Development of Marine Autopilot Simulator

The mathematical model of the ship autopilot system is established which centering on marine hydraulic steering gear, based on the Nomoto ship motion model, and considered the influence of wind, wave, flow and other environmental factors on ship course angle. Depend on this model, the physical-digital hybrid simulation autopilot simulator is developed. This simulator has all of the operating functions of the ship steering system, it can not only simulate the turbine engine working scenarios, but also dynamically display the operation process, and the simulator is applicable to the ship track control research and crew training work.

The Analysis on the Tribological Properties of TPU/PVC Blends with Chrome-Plated Steel under Dry Sliding

It is based on actual working conditions and parameters of the hydraulic steering gear, to reach the purpose of the optimizing rubber by different rubbers mixing technology. Comparison the five kinds rubber and metal of the friction characteristics in dynamic fit, obtained a performance excellent rubber in the specific operating conditions. Then improve the overall service life of the transportation equipment. It is first prepared the same hardness TPU and PVC and blends that is ratio of 2:8, 5:5and8:2 in this article. The pros and cons of the five rubbers are analyzed by friction and wear properties of the above experimental. The test curve of coefficient friction and wear with time has been done under different load at constant low speed, friction and wear and wear mechanism of five rubbers with chrome-plated steel comparatively analyses to determine TPU/PVC = 8:2 blends has the heat resistance and wear resistance are better than TPU and PVC under dry sliding conditions.

The Analysis on the Tribological Properties of TPU/PVC Blends under Oil Lubrication

Based on actual working conditions and parameters of the hydraulic steering gear, the purpose is optimizing the rubber seal of steering gear by different rubbers mixing technology. Compare the five kinds of rubber with metal of the friction characteristics in dynamic fit, it can obtain a performance excellent rubber real in the specific operation conditions. And then improve the overall service life of the steering gear. It is first prepared the same hardness TPU and PVC and blends that the ratio is 3:7, 5:5and7:3 in this article. The pros and cons of the five rubbers are analyzed in friction and wear properties of the above experimental. The test curve of coefficient friction and wear with time has been done under different load at constant low speed. It determines TPU/PVC = 3:7 blends through friction and wear and wear mechanism of five rubbers with steel comparatively analyses, and the heat resistance and wear resistance of them are better than the other TPU/PVC blends and PVC under oil lubrication conditions.

Simulation of Drive System for some Type of Amphibious Armored Vehicle Based on AMESim

How to use simulation software AMESim to build the drive system model of some type of armored assault vehicle is introduced. Accelerating and steering on various kinds of roads and those with different gradients are dynamically simulated. The analysis of the performance parameters changing with time of each gear, driving shaft, hydraulic steering gear, driving wheel and engine will provide theoretic references for improvement of this vehicle.

Simulation of cavitation in rotary valve of hydraulic power steering gear

Hydraulic power steering gear supplies assistant power by liquid stream. The stream will be changed greatly for the flow field formed by the rotary valve will vary during steering. And the change of the stream in this narrow field will (be big enough to) cause the fluctuation of the assistance power and noise of the steering gear. 3-D meshes of the flow field between the sleeve and the rotor of the valve with different structure parameters such as entry caliber and groove depth were set up and a general CFD code-Fluent was used to analyze the stream performance. The results including pressure and gas-phase’s volume fraction were analyzed under certain operation flow rate. It was found that the entry caliber did not affect the operation pressure of the valve under the same flow rate but affected the gas-phase’s volume fraction of the flow field, and so did the groove depth of the valve’ sleeve and rotor. Many researches have pointed that the noise of steering valve is almost cavitation noise, that is, the gas-phase in the flow field has great correlation with rotary valve noise. Based on these analyses of the stream in the rotary steering valve, this paper gave suggestion that increasing entry caliber of the rotary valve and choosing appropriate groove depth will reduce the valve noise.

A NEW HIGH PRESSURE HYDRAULIC STEERING GEAR

Naval Engineers JournalVolume 78, Issue 1 p. 117-118 A NEW HIGH PRESSURE HYDRAULIC STEERING GEAR First published: February 1966 https://doi.org/10.1111/j.1559-3584.1966.tb05051.xAboutPDF ToolsExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume78, Issue1February 1966Pages 117-118 RelatedInformation

Edward Augustus Inglefield, 1820–94

Polar explorers are necessarily men of many parts, but even among that fraternity Admiral Sir Edward Augustus Inglefield seems to have commanded a particularly wide range of talents. Apart from his seamanship, he possessed artistic and mechanical accomplishments. He was the inventor of the hydraulic steering gear and of the “Inglefield anchor”; he wrote several pamphlets on naval subjects including one on terrestrial magnetism; the distinction of his paintings, of which several were exhibited at a naval exhibition at Chelsea in 1891 and some at the Royal Academy, is evident from the water-colour of the yacht Isabel in Arctic setting reproduced with this article. He was a gardener, a collector of old glass, and a graceful after-dinner speaker.