電液伺服的蝶閥設計

機械設計制造及其自動化論文，論文編號:JX1131  論文字數:12663.頁數:30

摘     要
 
 一般蝶閥開閉角度由一氣動比例閥與氣缸控制的。由于充液罐容積比較小，壓機工作時充液罐的液面波動較大，而氣動比例閥控制精度較低，且氣動閥長期在高頻率大行程狀態下工作，導致氣動控制閥和氣缸內部元件損壞造成停產事故，嚴重影響生產，因此有必要進行改造。于是把40MN快鍛機充液罐液位控制由原氣動比例閥和氣缸控制蝶閥開閉角度改成電液伺服閥和液壓缸控制方式。
 第一章，介紹了目前蝶閥的發展狀況、結構組成和工作原理；液壓缸的選用原則；以及電液伺服連續系統的不同控制方式。
 第二章，具體地給出了整個控制系統的構成，畫出了系統的控制原理簡圖，以及在整個系統中，信號的傳遞過程。
 第三章，明確地說明了各主要功能元件的工作原理和設計準則、選用準則，并畫出了蝶閥和液壓缸的結構原理圖。尤其明確了所需蝶閥的各項技術指標，并計算出了其流量系數、最大流量、最大流速等重要數據。
 第四章，根據機械設計手冊，主要對蝶閥、轉軸等主要零件進行了設計。并對蝶閥主軸、轉軸、液壓缸、螺釘和鍵等關鍵零件做了強度校核，其結果都滿足設計要求。
 第五章，對整個設計過程的一個回顧，并對系統應用的一個展望。
  
關鍵詞：蝶閥控制系統  工作原理  液壓缸
 

Abstract
 
 The opening and closing angle of butterfly valve was controlled by a pneumatic proportional valve and cylinder. Due to the smaller cubage of liquid-filled tank, the bigger undulation of filled tank at compressor working time, moreover, the lower control precision of pneumatic proportional valve, and pneumatic valve always works in big state of high frequency and long journeys, the internal components of pneumatic control valve and cylinder are damaged and this will caused shutdown accident, which seriously affects producing. So it is necessary to be made again.By improving the maintenance mode, the proposed liquid level control in the filled tank of 40MN quick forging machine will be changed form the original mode that the pneumatic proportional valve and cylinder control opening and closing angle of butterfly valve into electro-hydraulic servo valve and hydraulic oil tank control mode.
 In the first chapter, I give the current state of butterfly valve development, structure form and working principle of butterfly valve; selection principle of hydraulic oil tank; and the different control modes of the electro-hydraulic servo system.
 In the second chapter, I describe the structure of the entire control system in detail, and draw the sketch of the system control principle. And the signal’s delivery in the whole system.
 In the third chapter, I show a clear illustration of the main components of the functional principles and design criteria, selection criteria, and map out the structure theory drawing of the butterfly valve and the hydraulic oil tank. Particularly, I nail down the required technical targets of the butterfly valve, and calculate its flow coefficient, the largest flow, the largest flow velocity and other important data.
 In the fourth chapter, based on the mechanical design manual, I mainly design the right butterfly valve, shafts and other major components. As well as butterfly valve spindle, rotating shafts, hydraulic oil tank, bonds and screws, and other key components to do the intensity checking, and the results are to meet design requirements.
In the fifth chapter, I review the whole design process and application of a prospect.

Keywords：Butterfly Valve Control System；Principle；Cylinder

目  錄
中文摘要 i
英文摘要 ii
目錄 iii
第一章     緒論 1
 1.1  課題背景即國內外發展概況 1
 1.1.1  調節型蝶閥 1
 1.1.2  可曲撓伸縮式蝶閥 2
 1.1.3  閥門傳動裝置 3
 1.1.4  液壓缸 4
 1.1.5  電液比例/伺服系統的控制方式 5
 1.1.6  連續控制系統 5
 1.2  課題的研究意義及研究內容 7
 1.2.1  課題的研究意義 7
 1.2.2  技術指標 7
第二章     系統的結構與組成 8
 2.1   系統構成 8
 2.2  各主要元件功能 9
第三章     工作原理 10
 3.1   蝶閥 10
 3.2  液壓缸 13
 3.3  角度傳感器 14
 3.4  蝶閥的安裝與維護 16
 3.4.1  蝶閥的安裝的注意事項 16
 3.4.2  蝶閥的使用維護注意事項 16
第四章     強度校核 17
 4.1   蝶閥的各項參數 17
 4.2  軸的設計與校核 17
 4.3  其它零件的校核 22
第五章     結論與展望 24
參考文獻 25
致謝 26