【正文】 6 三位六通 電磁換向閥 36DF3E16B 80 7 兩位兩通 電磁換向閥 22DF3E16B 80 8 三位六通 電磁換向閥 36DF3E16B 80 9 單向調(diào)速閥 AQF3E10cB 50 10 節(jié)流閥 LF3E10B 10 11 壓力表 F3E1B 廣東海洋大學(xué) 2020 屆 本科生畢業(yè) 設(shè)計(jì) － 10 － 確定管道尺寸 油管內(nèi) 徑尺寸一般可參照選用的液壓元件接口尺寸而定，也可按管路的公稱壓力來選擇 。由表 24，取標(biāo)準(zhǔn)值ｄ＝ 125ｍｍ。 表 3－ 1 工作循環(huán)各階段的外負(fù)載 工作循環(huán) 外負(fù)載 F（ KN） 工作循環(huán) 外負(fù)載 F（ KN） 頂起 12 快進(jìn) 5 卡爪放下 3 壓退 500 降下 12 擬定液壓系統(tǒng)原理圖 確定供油方式 考慮到該機(jī)床 在壓退軸承 時(shí) 的 負(fù)載 較大，速度不大。 關(guān)鍵詞： 滾動(dòng)軸承；拆卸；液壓缸；機(jī)械結(jié)構(gòu)ABSTRACT II INTRODUCTION In the sixth National Railway acceleration background, the Safety of the Railway Transport appears to be particularly important. On the one hand railway freight train rolling bearings support the weight of a whole carriage, on the other hand bearing inner race in high speed rotation along with the axle. It is the nonwearable parts in application, but it is also the key ponents in Railway Transportation Safety .Once the rolling bearings are broken, the whole train cannot move in time. Transportation route is severe ballup. At the some time, it is very difficult to repair the train again. As a result, it is very important to prevent the fault of rolling bearings. The regulation on railway department said that rollingstock section must overhaul the rolling bearings regularly, aim at some rolling bearings need to be disassembled, The STL2A type fixed semiautomatic dismantling machine for rolling bearings is considered. The STL2Atype dismantling machine for rolling bearings is a specialized machine which is use for dismantling the rolling bearings of freight trains, It can dismantle all kinds of rolling bearings at the time being. Such as the rolling bearings of noncased axles of the wheels of RB2, RD2, RE2. As a result, It is widely used in train manufacturers, train divisions, train overhaul factories and so on. The machine is made up of a bed, a left and right dismantling device, a supporting jar, a advancing jar, a bearing roll dish, a hydraulic pressure system and a electric control system, etc. This paper is to design a dismantling machine which meets the requirement of accurate in localization, simple in structure, small in volume, low in price, high in automatic level and efficiency, easy in operation and maintenance base on the materials and investigation. This paper mainly designs the hydraulic system and mechanical structure of the machine. Overall design parameter and technical specifications: 1) the biggest dismantling power of one side: 500 KN 2) the wheels smallest outer diameter: 760 mm； 3) the wheels biggest outer diameter: 915 mm； 4) the biggest length of axle: 2200mm； 5) track gauge: 1435mm， 6) the power of electromotor: 15KW； 7) the high pressure of hydraulic system’s:10Mp； 8) the low pressure of hydraulic system’s: 2Mp. KEYWORDS: rolling bearing； dismantle； hydraulic pressure jar； Mechanical structure 廣東海洋大學(xué) 2020 屆 本科生畢業(yè) 設(shè)計(jì) － 1 － STL— 2A 貨車滾動(dòng)軸承固定式半自動(dòng)拆卸機(jī)設(shè)計(jì) 專業(yè)：機(jī)械設(shè)計(jì)制造及其自動(dòng)化 ，學(xué)號(hào) ： 202020211325， 姓名 ： 指導(dǎo)教師： 畢業(yè)設(shè)計(jì)說明書 1 緒論 課題來源 鐵路貨車滾動(dòng)軸承一方面要承受整個(gè)車廂的重量，另一方面軸承的內(nèi)圈又隨車軸一起作高速旋轉(zhuǎn)，是非常容易磨損的部件，也是關(guān)系到鐵路運(yùn)輸安全的關(guān)鍵部件。 此次設(shè)計(jì)是 根據(jù)已有的《科技文件材料》、《機(jī)械設(shè)計(jì)手冊》、《液壓系統(tǒng)設(shè)計(jì)簡明手冊》等資料以及到 柳州鐵路局 湛江 車輛段廠 現(xiàn)場參觀實(shí)習(xí)， 設(shè)計(jì)出定位準(zhǔn)確，結(jié)構(gòu)簡單，占地面積小，成本低，自動(dòng)化程度高，操作和維修方便的拆卸機(jī)。 3 拆卸機(jī) 液壓系統(tǒng) 設(shè)計(jì) 工況分析 首先根據(jù)已知條件，繪制運(yùn)動(dòng)部件的速度循環(huán)圖，如圖 1－ 1 所示。 液壓 系統(tǒng)的 計(jì)算 和液壓元件 的 選擇 拆卸缸主要尺寸計(jì)算 工作壓力 P 的確定 計(jì)算液壓缸內(nèi)徑 D 和活塞桿直徑 d 拆卸缸的工作壓力 P，初算時(shí)可取系統(tǒng)工作壓力 ，即 P=Pp=10Mp 。 與液壓泵匹配的電動(dòng)機(jī)的選擇 根據(jù)設(shè)計(jì)要求給定的電機(jī)功率 P=15KW，查《機(jī)械零件手冊》第 274 頁，表 17－ 1，選取三相異步電機(jī)： Y160L－ 4－ B3 ，額定轉(zhuǎn)速 1500r/min 。從材料力學(xué)可知，承受內(nèi)壓力的圓筒，其內(nèi)應(yīng)力分布規(guī)律因壁厚 的不同而各異。缸體外形長度還要考慮兩端端蓋的厚度。 鳴 謝 － 15 － 鳴 謝 在本設(shè)計(jì)的過程中，從最初的選題、資料的搜集和整理、理論值計(jì)算到繪