畢業(yè)論文標(biāo)準(zhǔn)WORD格式排版 36頁 附機(jī)械總裝圖.dwg 軸耳.dwg 油箱.dwg 液壓原理圖.dwg 下板.dwg 外連桿.dwg 上板架.dwg 內(nèi)連桿.dwg 焊接件.dwg 固定鉸接處.dwg 閥體.dwg 閥塊.dwg 泵站圖.dwg

摘 要
本次畢業(yè)設(shè)計(jì)對(duì)象是液壓升降平臺(tái)，這套裝置主要用于舉升重物。它的舉升高度為1米，舉升重量為1噸，其動(dòng)作主要是由兩個(gè)雙作用液壓缸推動(dòng)“X”型架，帶動(dòng)上板來實(shí)現(xiàn)的。該液壓升降平臺(tái)主要由兩個(gè)部分組成：機(jī)械部分和液壓部分，其中機(jī)械部分主要由上板架、下板架、內(nèi)連桿和外連桿四部分組成。本設(shè)計(jì)設(shè)計(jì)、選擇了機(jī)械部分材料與結(jié)構(gòu)，并對(duì)其進(jìn)行受理分析與校核，以便檢驗(yàn)是否滿足強(qiáng)度、剛度的要求，分析及校核的結(jié)果證明機(jī)械結(jié)構(gòu)的設(shè)計(jì)可以滿足要求。在對(duì)液壓控制系統(tǒng)的設(shè)計(jì)過程中，先進(jìn)行了總體方案設(shè)計(jì)。在選擇液壓的各個(gè)控制回路的時(shí)候，在對(duì)各個(gè)回路進(jìn)行了對(duì)比后調(diào)速回路我選擇了進(jìn)油口節(jié)流調(diào)速回路；卸荷回路我選擇了帶有二位二通電磁換向閥的卸荷回路；保壓回路我選擇的是用液控單向閥的保壓回路。確定了各種基本回路后，又確定了液壓系統(tǒng)的傳動(dòng)形式，由于開式系統(tǒng)所具有的系統(tǒng)簡(jiǎn)單和散熱條件好等優(yōu)點(diǎn)，所以把傳動(dòng)系統(tǒng)確定為開式系統(tǒng)。在擬定液壓系統(tǒng)原理圖后，對(duì)液壓元件及輔件進(jìn)行了設(shè)計(jì)、選擇，并對(duì)其進(jìn)行校核。經(jīng)過計(jì)算后液壓缸選定為45毫米的液壓缸，液壓泵選定為齒輪泵，根據(jù)系統(tǒng)工作的最大功率我選擇的電動(dòng)機(jī)為Y112M-4行三相異步電動(dòng)機(jī)。在確定泵后，又對(duì)其他的元件及輔件進(jìn)行了合理的選擇，最后確定各種元件后,進(jìn)一步完成了我的設(shè)計(jì)題目。

關(guān)鍵詞: 液壓；升降平臺(tái)；上板架；下板架；內(nèi)連桿；外連桿

Abstract
I graduated from the current design is done mainly hydraulic lifts, mainly divided into two parts: mechanical and hydraulic parts. Mechanical parts which I think the main needs to be considered is the subject of several major part of the intensity: on board planes, under the board planes, within and outside link connecting rod. In this part of my four were on board from top to bottom-line Analysis of the internal and external linkage, I had the strength check. After my analysis and after checking I think I can satisfy the design requirements. Then I entered the various parts of the hydraulic choice. In the choice of the hydraulic control circuit all the time, in the loop on a comparison of the governor after I selected the import speed loop circuit; unloading loop I chose the valve of the unloading circuit; packing circuit I have chosen The use of one-way valve controlling the packing circuit. In determining the needs of the various circuit I, I'm sure I wear the hydraulic system of fixed form, according to open-system and the system simple cooling system features good condition, I set my drive system for open - System. On the other hydraulic components accessories choice, I had to them after the calculation of the hydraulic cylinders after I voted 45 mm of hydraulic cylinders, according to the transmission gear pump stability, I take my pump as a gear Pump, according to my system the maximum power of the work I elected to the motor Y112M-4 to three-phase asynchronous motor. I set the pump, I also based on this I need the yuan other accessories for a reasonable Choose, finally, I identified a variety of components, further complete the design of the topics I.

Keywords：Mechanical;Hydraulic; Panels from top to bottom;Inside and outside link

目錄
摘 要I
AbstractII
第1章 緒論1
第2章 確定液壓系統(tǒng)方案2
2.1確定基本回路2
2.1.1卸荷回路2
2.1.2 調(diào)速回路的確定4
2.1.3保壓回路的確定7
2.2 液壓傳動(dòng)系統(tǒng)的形式確定9
2．3 液壓系統(tǒng)原理圖10
第3章 設(shè)計(jì)、選擇液壓元件、輔件11
3.1確定液壓缸系數(shù)11
3.1.1 初選系統(tǒng)壓力11
3.2 液壓輔助元件的計(jì)算及選擇12
3.3油箱的設(shè)計(jì)12
3.3.1油箱的設(shè)計(jì)要點(diǎn)13
3.3.2油箱容積計(jì)算13
3.4 其它元、輔件的選擇13
3.4.1.吸油濾油器13
3.4.2選擇濾油器的基本要求14
3.4.3溢流閥的選擇14
3.4.4壓力表開關(guān)選擇14
3.4.5單向節(jié)流閥15
3.4.6液控單向閥的選擇15
3.5閥塊的設(shè)計(jì)15
3.6 效率的計(jì)算16
3.6.1計(jì)算沿程壓力損失16
3.6.2效率計(jì)算18
3.6.3系統(tǒng)發(fā)熱與溫升計(jì)算19
3.6.4液壓系統(tǒng)的一般使用和維護(hù)19
第4章 機(jī)械部分的受力分析力22
第5章 機(jī)械部分的強(qiáng)度校核25
5.1 外連桿強(qiáng)度校核25
5.2 內(nèi)連桿強(qiáng)度較核26
5.3 連接兩連桿的銷軸的強(qiáng)度校核27
第6章 結(jié)論29
參考文獻(xiàn)30
致謝31