پديد آورنده :
پيرستاني، محمد حسام
عنوان :
بررسي، ارائه اصول طراحي ، روابط حاكم، شبيه سازي و تدوين تكنولوژي ساخت سيستم فيدبك، فنر فلاپر و لوله خم در شيرهاي سروهيدروليك
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
ساخت و توليد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مكانيك
صفحه شمار :
[نه]،209ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
عليرضا فدايي تهراني
استاد مشاور :
محمدرضا فروزان
توصيفگر ها :
فنر بازخورد , لوله انعطاف پذير , تكنولوژي توليد
تاريخ نمايه سازي :
29/6/90
استاد داور :
محسن بدرالسماء، ناصر نهضت
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Studying Collecting Design Fundamentals and Principle Equations Simulation Codification of Manufacturing Process of Feedback System Flapper Spring Flexure Tube in Hydraulic Servo Valve Mohammad Hessam Pirestani M pirestani@me iut ac ir Date of Submission 2011 05 30 Department of Mechanical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor Dr Alireza Fadaei Tehrani mcjaft@cc iut ac irAbstractNowadays the application of mechatronic systems in various aspects and industries such as military aerospace manufacturing automation CNC machining equipments petroleum and gas industries civilequipments and etc are wide spread Combination of hydraulic and electronic devices in a control systemneeds some parts to connect them which is an electro hydraulic servo valve A hydraulic valve is used todirect and control flow or pressure of a hydraulic flow An electro hydraulic servo valve which consists ofelectromagnetic hydraulic sections is response of converting low power electric signal to hydraulicsignals that can control hydraulic devices with high speed and accuracy Flapper nozzle electro hydraulicservo valves with dry torque motor and force feedback system have wide spread use in any applications because of their high accuracy and speed These valves consist of delicate and precise parts that havecritical material selection and manufacturing procedures If these parameters are not selected appropriately may defect accuracy and stability of the whole system Pilot valves which compound of electromagneticand hydraulic sections have important role in servo valves structure because of their sensitive parts In the present work manufacturing process of a pilot valve of a commercial electro hydraulic flapper nozzle servo valve with dry torque motor is studied In the first chapter all types of noted valves isintroduced and structure and various structures and mechanism of these valves are explained Then structure of a two stage flapper nozzle servo valves with force feedback system is explained and the role ofeach part is mentioned In the second chapter mathematical relations of electromagnetic mechanical andhydraulic sections of a servo valve is brought and effects of some critical parameters on performance ofservo valve is shown Since the reverse engineering method was chosen to extract manufacturing procedureof a servo valve a two stage flapper nozzle servo valve was selected In third and fourth chapters properties and specifications of each part are studied Firstly on each part chemical analysis was done todiscover the material used to make it and its metallurgical properties Chemical analysis was performed onEDX SERON TECH AIS 2100 machine EDX method does not report exact results for elements withatomic number less than 4 SEM photography of machined surfaces hardness and roughness tests was donefor each parts of valve Finally with gathering the results of pervious tests and technical references foreach parts proper material and manufacturing procedure selection was suggested For process selection ofeach part some criteria such as quantity surface roughness and dimensional tolerance are vital Keywords Electro Hydraulic Servo Valve EHSV Feedback Spring Flexure Tube ManufacturingProcess
استاد راهنما :
عليرضا فدايي تهراني
استاد مشاور :
محمدرضا فروزان
استاد داور :
محسن بدرالسماء، ناصر نهضت
