【正文】 .... 16 液壓泵的選擇 .................................................................................. 16 IV 電動(dòng)機(jī)功率的確定 .......................................................................... 17 液壓閥的選擇 .................................................................................. 18 管道尺寸的確定 .............................................................................. 19 油箱有效容積的確定 ...................................................................... 19 液壓油的選定 .................................................................................. 20 病理床液壓系統(tǒng)性能驗(yàn)算 ..................................................................... 20 液壓系統(tǒng)壓力損失 .......................................................................... 20 系統(tǒng)溫升驗(yàn)算 .................................................................................. 22 本章小結(jié) ................................................................................................. 23 第 3章 病理床所用液壓缸基本尺寸的設(shè)計(jì) .................................................. 24 液壓缸主要尺寸的確定 ......................................................................... 24 液壓缸內(nèi)徑及活塞桿直徑的確定 .................................................. 24 缸筒壁厚的計(jì)算 .............................................................................. 24 缸體外徑的計(jì)算 .............................................................................. 24 液壓缸工作行程的確定 .................................................................. 24 最小導(dǎo)向長(zhǎng)度的確定 ...................................................................... 25 缸體長(zhǎng)度的確定 .............................................................................. 26 液壓缸的結(jié)構(gòu)設(shè)計(jì) ................................................................................. 27 缸體與缸蓋的連接結(jié)構(gòu) .................................................................. 27 活塞桿與活塞的連接結(jié)構(gòu) .............................................................. 27 密封裝置 .......................................................................................... 27 液壓缸的緩沖裝置 .......................................................................... 28 液壓缸主要零件的材料 .................................................................. 28 液壓缸的安裝方法 .......................................................................... 28 本章小結(jié) ................................................................................................. 28 第 4章 病理床液壓站的設(shè)計(jì) .......................................................................... 29 油箱 的設(shè)計(jì) ............................................................................................. 29 液壓油箱容積的確定 ...................................................................... 29 油箱的結(jié)構(gòu)設(shè)計(jì) .............................................................................. 30 液壓泵組的結(jié)構(gòu)設(shè)計(jì) ............................................................................. 31 布置方式 .......................................................................................... 31 連接和安裝方式 .............................................................................. 31 V 防振降噪措施 .................................................................................. 32 本章小結(jié) ................................................................................................. 32 結(jié) 論 ................................................................................................................ 33 致 謝 ................................................................................................................ 34 參考文獻(xiàn) ............................................................................................................ 35 附錄 A ................................................................................................................ 36 VI CONTENTS Abstract ...............................................................................................................II Chapter 1 Introduction ...................................................................................... 1 Summary of the Hydrauliic System ........................................................... 1 The Research of Pathological Bed ........................................................... 2 The Meaning and Purpose of the Research ................................................ 2 Chapter 2 The Design of Pathological Bed Hydraulic Servo System ............ 4 Design Requirements ................................................................................. 4 Pathological Bed Hydraulic Actuator Load Force Calculation .................. 4 Analysis of the Work ........................................................................... 4 Load of the Head Movement............................................................... 5 Load of the Knees Bent ....................................................................... 6 Load of the Trunk Movement.............................................................. 7 System Programming ................................................................................. 8 The Choice of Implementing Ageny ................................................... 8 The Choice of Speed Control Loop..................................................... 8 The Choice of Trading to the Looop ................................................... 8 The Choice of Hydraulic Source ......................................................... 8 Sequence of Movement .............................................................................. 8 The Main Calculation of Pathological Bed Hydraulic System ................ 10 Load Force of the Hydraulic Cylinder Calculation ........................... 10 Hydraulic Cylinder Pressure and Back Presssure of Hydraulic Cylinder Back to the Oil Chamber 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