高空作業(yè)車液壓和電氣控制系統(tǒng)設(shè)計【含CAD圖紙+PDF圖】

喜歡這套資料就充值下載吧。資源目錄里展示的都可在線預覽哦。下載后都有，請放心下載，文件全都包含在內(nèi)，【有疑問咨詢QQ:414951605 或 1304139763】喜歡這套資料就充值下載吧。資源目錄里展示的都可在線預覽哦。下載后都有，請放心下載，文件全都包含在內(nèi)，【有疑問咨詢QQ:414951605 或 1304139763】 Ultra-high hydraulic angle O-ring seal the experimental studyCui Yutao Du CunchenAbstract : nitrile rubber O-ring EHV end Kok containers sealed imposed on containers so high hydraulic seal experimental series. The results show that angle enclosed structure, as well as O-ring compression rate, diameter, enclosed space, rubber hardness, The sealing surface roughness and seal the form and position tolerances, and other relevant factors reasonable match, strict control, the use of ordinary O-ring can be achieved 138MPa ultrahigh static hydraulic seal. Keywords : EHV static O-ring sealAlong with the rapid modern industrial development, UHP increasingly widespread use of the ultrahigh-pressure killing Hill, super-high-speed refrigeration, Expanded food industry, supercritical fluid extraction, low-salt treatment, Expanded room temperature and high pressure compression fermentation and other typical applications. Such equipment is produced by the many advantages of increasing peoples attention. If UHP food production is instantaneous pressure, role uniform, safe operation and low energy consumption to maintain good natural food color, smell and taste and nutritional characteristics of the components, with 21 new food simple, safe, natural, nutrition, health, and environmental protection in consumption demand. Which have significant social and economic benefits, has tremendous market potential and broad prospects for development. However, Chinas current UHP food production industries badly need to improve the level of equipment, can produce economic, Energy-saving, safe and efficient handling equipment constrains EHV food processing technology marketing major bottleneck. Among them, how to create economic EHV containers and ensure that the high pressure seal containers is particularly difficult lie. UHV equipment can operate normally sealed to a large extent depends on the integrity of the structure. High pressure sealing device about the weight of the containers, weighing 10% to 30%. and the cost accounts for 15% 40% of the total cost, design sealed pressure vessel design is an important component. Because many UHV equipment for space operations, the operation requires not only material can be quickly loaded fast again. and the frequent requirement in the open despite repeated achieve reliable sealing, General use of fast open-closed structure since the close of this problem can be resolved. Ordinary rubber O-ring seal structure is simple, convenience, low cost, compact installation, easy to use and has since closed closely role advantages, the industry is widely used. So experiment nitrile rubber (NBR) O-rings (32.5 specifications for the 3.55G. implementation of the standards for GB3452.1-92) Kok sealed experiments. 1 O-ring seal from the Principle1) state preload O-ring sealed site after its general section by a certain amount of compression, as O-rings have good flexibility, the interface will have a certain degree of contact pressure, thus achieving preload under seal. 2) state When the sealed chamber filled with hydraulic media, the role of media pressure, the O-ring to shift the low-pressure side, and the seal gap closed to live. With the increase of media pressure, the contact pressure has also been increasing, the peak is always greater than the fluid pressure. This will guarantee that the O-ring seal the sealing function, reflects the O-ring seal the ability to automatically sealed. Experience has shown that for ordinary rubber materials, generally 13 105Pa than the standard pressure. 2 the main parameters of SealO-ring seal effects and compression rate, diameter, enclosed space, rubber hardness, The sealing surface roughness and seal the form and position tolerances, and other factors are closely related. The impact of O-ring seal properties of various factors, as long as the parameters of a design will reduce the unreasonable results sealed, even result in seal failure. Now, therefore discuss the impact of specific factors to determine the value . 1）compression rateAfter the O-shape link loads the seal spot, its section generally receives a quota the compression, because the O shape link has the good elasticity, docking touches personally meets has the certain contact pressure, thus realizes under the pre- tight condition seal.2) active statusAfter the sealed chamber sufficiently enters the hydraulic pressure medium, in under the medium pressure function, the O shape link carries over a low pressure side, seals up the seal gap. Along with the medium pressure increase, the contact pressure also along with it increase, its peak value always is bigger than the fluid medium pressure. This has guaranteed the O shape packing ring seal function, also has reflected the O shape packing ring automatic sealing ability. The experience indicated that, regarding the ordinary rubber material, generally as the standard compares the pressure take 13105 P a.3) seal gapO-ring gap in the high-pressure easily deformed easily be squeezed into the sealed space in order to cause damage, it is necessary to the O-ring seal gap to be strictly controlled. To prevent O-ring extrusion occurred, and to take into account the difficulty of installing and dismantling, The experimental space for the sealing of 0.1mm.4) hardness Elastic modulus small O-ring, the maximum contact stress small, extrusion capacity, easy to destroy. So when a high pressure, high hardness should use the O-ring. In this experiment the O-ring hardness IRHD (International Rubber Hardness levels), 80 5.5) sealing surface roughness Seal the surface roughness is sealing technique to measure an important indicator. If the sealing surface Department has manufacturing defects or vertical scratch, it is very easy to seal leakage media. Ultrahigh Pressure Vessel Safety Technology Supervision provided EHV containers sealing surface roughness Ra should be less than or equal to 0 . 8 m. The experimental sealing surface roughness Ra from 0.4 m. 5) seals the form and position tolerances secret Sealed cylindrical surface of roundness, cylindricity tolerance by eight precision selection Hole-face vertical axis of tolerance by seven precision selection. 3 experimental devices and airtight structure （1）Experimental Device 1. Press flat under 2. Under plate 3. EHV four containers. 4.Pallets 5.O-ring 32.5 3.5 5-Ring 6.0 5.3 65 7. Cover 8. on the plate 9. Press plate 10. Stud 1 1. Arbors 12. Bolt 13. high-pressure pipe 14. connector nut 15. Nut (2) sealing principle When tighten bolts, which will help the upward movement of pallets compress O-rings, O-ring Close to the cone axis and the vessel wall. and the cone axis and the difference between forming ring seal belt, formed preload sealed. Operating in the state, with the media (the media to experimental pressurized water) pressure, the O-ring is compressed volume increases, contact pressure increased accordingly so as to achieve a reliable seal.4 experiment (1) O-ring uniform surface coating small grease. Cover and Arbors will use double-headed stud connection, and O-ring installed mandrels, Bolt pallets used to connect to the mandrels to compress O-ring; (2) high-pressure pipe assembly, and the small joints nut nuts, Nut will joints and hydraulic media entrance of the threaded connection; (3) under the pallets, containers and with the end caps on the map by a plate placed. Press access to power, two plate compactor next two pad; (4) access to power, preheat 5 minutes, Pressure relief valve rotation. 10 MPa to the differential pressure, pressure per-Level 5 minutes to observe any leakage; (5) Records Expander pressure on the indicator values and the hydraulic fluid leakage. 5 experimental data loading sequence of records in table 1. Hydraulic value (MPa)1021334152627285931021301386 Results and Discussion (1) several experiments show that, as long as a reasonable choice and strictly control the impact of the sealing performance of the main factors figure, Individual use of ordinary O-ring seal structure cone 138MPa can achieve a reliable seal; (2) As laboratory equipment constraints, the experiment is just 138MPa hydraulic seal, O-ring seals that there is a potential to be tapped. This breakthrough of the traditional information that the O-ring seal maximum static pressure of 70MPa and when work pressure than Uniform Canada hubcap need to prevent extrusion of the limited space, it is worth further experiments. (3) O-ring seal structure of cone-shaped O-ring seal and the corresponding surface of the manufacture of certain deviation compensation, This reduces the manufacturing of precision requirements, this seal structure should be promoted; (4) O-rings in the completed several high pressure seal, found his appearance minor extrusion gap phenomenon. This shows that the O-ring is achievable 138MPa about EHV sealed But media pressure is required to consider increased use of O-rings with the triangular pad combination sealed structure or use other sealing pathways to solve, but this paper to explore the impact of sealing performance of the main parameters of methods, there is still a definite reference value. hubcap need to prevent extrusion of the limited space, it is worth further experiments.超高液壓下形環(huán)角密封的實驗研究崔玉濤 杜存臣摘要:采用丁腈橡膠形環(huán)實現(xiàn)超高壓容器端部角密封,對容器施加超高液壓做系列密封實驗。結(jié)果表明,采用角密封結(jié)構(gòu),并對形環(huán)壓縮率、截面直徑、密封間隙、橡膠硬度、密封面的粗糙度和密封件的形位公差等相關(guān)因素進行合理匹配,嚴格控制,使用普通形環(huán)可以實現(xiàn)138超高液壓的靜密封。關(guān)鍵詞: 超高壓 形環(huán) 靜密封隨著現(xiàn)代工業(yè)的快速發(fā)展,超高壓越來越廣泛地運用到超高壓殺茵、超高速冷凍、食品膨化工業(yè)、超臨界流體萃取、低鹽化處理、室溫高壓膨化以及加壓發(fā)酵等典型應用場合。這類設(shè)備所生產(chǎn)的產(chǎn)品具有眾多優(yōu)越性,日益引起人們的普遍關(guān)注。如超高壓食品的生產(chǎn)具有瞬間加壓、作用均勻、操作安全和耗能低能很好地保持食物天然的色、香、味和營養(yǎng)成分的特點,符合21世紀新型食品簡便、安全、天然、營養(yǎng)、衛(wèi)生、環(huán)保的消費需求。因而有著顯著的社會效益和經(jīng)濟效益,具有巨大的潛在市場和廣闊的發(fā)展前景。但是,現(xiàn)今我國的超高壓食品的生產(chǎn)存在亟待提高工業(yè)裝備水平的問題,能否制造出經(jīng)濟、節(jié)能、安全、高效的處理設(shè)備成為制約超高壓食品處理技術(shù)市場推廣的主要瓶頸。其中,如何經(jīng)濟地制造超高壓容器并保證容器的超高壓密封尤為難點之所在。超高壓設(shè)備能否正常運行在很大程度上取決于密封結(jié)構(gòu)的完善性。高壓密封裝置的重量約占容器總重的10%30%,而成本卻占總成本的15%40%,因此密封設(shè)計工作是高壓容器設(shè)計的重要組成部分。由于許多超高壓設(shè)備為間隙操作,操作時不但要求物料能快裝快卸,且要求在開啟頻繁的情況下仍能實現(xiàn)多次可靠密封,一般使用快開式自緊密封結(jié)構(gòu)才能解決這一難題。普通形橡膠密封環(huán)具有結(jié)構(gòu)簡單、制造方便、價格便宜、安裝緊湊、使用方便和具有自緊密封作用等優(yōu)點,被各行業(yè)廣泛使用。因此實驗采用丁腈橡膠()形環(huán)(規(guī)格為32.53.55,執(zhí)行標準為3452.192)進行角密封實驗研究。1 形環(huán)的自緊密封原理1)預緊狀態(tài)O形環(huán)裝入密封部位后,其截面一般受到一定量的壓縮,由于形環(huán)有良好的彈性,對接觸面會產(chǎn)生一定的接觸壓力,從而實現(xiàn)預緊狀態(tài)下的密封。2)工作狀態(tài)當密封腔充入液壓介質(zhì)后,在介質(zhì)壓力的作用下,形環(huán)移向低壓一側(cè),封閉住密封間隙。隨著介質(zhì)壓力的增加,接觸壓力亦隨之增加,其峰值總是大于流體介質(zhì)壓力。這就保證了形密封環(huán)的密封功能,也反映了形密封環(huán)的自動密封能力。經(jīng)驗表明,對于普通橡膠材料,一般以13105為標準比壓。2主要密封參數(shù)的確定形環(huán)的密封效果與壓縮率、截面直徑、密封間隙、橡膠硬度、密封面的粗糙度和密封件的形位公差等因素密切相關(guān)。在影響形環(huán)密封性能的諸因素中,只要有1個參數(shù)的設(shè)計不合理就會降低其密封效果,甚至導致密封失效。因此下面就討論一下各影響因素具體數(shù)值的確定。1)壓縮率形環(huán)密封是典型的壓縮型密封。形環(huán)截面直徑的壓縮率是影響密封效果和使用壽命的重要參數(shù)。大多數(shù)情況下的泄漏與壓縮量不足有關(guān),但是過量壓縮又會造成裝拆困難和產(chǎn)生過大的殘余變形,而這將嚴重縮短其使用壽命。因此應合理確定形環(huán)的壓縮率。壓縮率用下式表示:=0/0100%式中0為形環(huán)的截面直徑(),為形環(huán)壓縮后的截面尺寸。對于靜密封壓縮率一般取10%22%,本實驗取為15%。2)截面直徑對于相同的壓縮量,截面直徑大的形環(huán)的接觸寬度大,相應的最大接觸應力小,因此在橡膠形環(huán)滿足結(jié)構(gòu)工藝等其他要求的情況下,盡可能選擇大截面的橡膠形環(huán)。本實驗容器密封面內(nèi)孔直徑為39,形環(huán)截面直徑取3.55。3)密封間隙形環(huán)在高壓力下很容易變形,容易被擠入密封間隙中去,造成損壞,因此必須對形環(huán)的密封間隙加以嚴格控制。為了防止形環(huán)發(fā)生擠出現(xiàn)象,并考慮到裝拆的難易程度,本實驗的密封間隙取為0.1。4)硬度彈性模量小的形環(huán),則最大接觸壓應力小,擠出量大,易破壞。所以當內(nèi)壓很高時,應選用硬度較高的形環(huán)。本實驗采用的形環(huán)硬度為(國際橡膠硬度等級)805。5)密封面的粗糙度密封面的粗糙度是密封技術(shù)中的一個重要衡量指標。如果密封面處有制造缺陷或縱向劃痕,則密封介質(zhì)很容易泄漏。超高壓容器安全技術(shù)監(jiān)察規(guī)程中規(guī)定超高壓容器密封面的粗糙度應當小于或等于0。8。本實驗密封面的粗糙取0.4。5)密封件的形位公差密封圓柱面的圓度、圓柱度公差按8級精度選取,端面對內(nèi)孔軸線的垂直度公差按7級精度選取。3實驗裝置與密封結(jié)構(gòu)（1）實驗裝置實驗裝置由壓力源( 型液袋式液壓脹管機)、高壓連接管路、設(shè)計壓力為200的超高壓實驗容器和軸向力平衡裝置(250的壓力機)組成。實驗裝置見圖1。1. 壓力機下平板2.下墊板3.超高壓容器4.托板5.形環(huán)32.53.556.形環(huán)655.37.端蓋8.上墊板9.壓力機上平板10.螺柱11.芯軸12.螺栓13.高壓管14.接頭螺母15.螺母(2)密封原理當旋緊螺栓時,將帶動托板向上移動壓緊形環(huán),形環(huán)將貼緊芯軸的錐面和容器器壁,與錐面和軸之間分別形成環(huán)密封帶,形成預緊密封。在操作狀態(tài),隨著介質(zhì)(本實驗加壓介質(zhì)為水)壓力的增加,形環(huán)的壓縮量也隨之增大,接觸壓力亦相應增加,從而實現(xiàn)可靠密封。4實驗過程(1)將形環(huán)表面均勻涂覆少量潤滑脂。將端蓋和芯軸用雙頭螺柱連接,把形環(huán)安裝到芯軸上,用螺栓將托板連接到芯軸上以壓緊形環(huán);(2)裝配高壓管、接頭螺母和小螺母,將接頭螺母與液壓介質(zhì)入口的螺紋連接;(3)將下墊板、容器、端蓋與上墊板按圖1位置放置。接通壓力機電源,使兩平板壓緊上下兩墊板;(4)接通電源,預熱5,旋轉(zhuǎn)溢流閥加壓。以10的級差加壓,每級保壓5,觀察有無泄漏;(5)記錄脹管機上的壓力顯示儀的液壓數(shù)值和液體泄漏情況。5實驗數(shù)據(jù)加載順序的實驗記錄見表1。液壓值(MPa)1021334152627285931021301386結(jié)果與討論(1) 經(jīng)多次實驗表明,只要合理選擇并嚴格控制影響密封性能的各主要因素的數(shù)值,單獨使用普通形環(huán)錐面密封結(jié)構(gòu)可以實現(xiàn)138的可靠密封;(2) 由于實驗設(shè)備的限制,本實驗只做到138的液壓密封,形環(huán)仍有一定的密封潛力可以挖掘。這突破了傳統(tǒng)資料認為的形環(huán)靜密封最高壓力為70和當工作壓力高于32需要加擋圈以防止間隙擠出的限定,值得進一步進行實驗研究。(3) 形環(huán)錐面密封結(jié)構(gòu)對形環(huán)和相應的密封面的制造偏差有一定的補償作用,這就降低了對制造精度的要求,因此這種密封結(jié)構(gòu)值得加以推廣使用;(4) 形環(huán)在完成多次超高壓密封后,發(fā)現(xiàn)其外觀有輕微間隙擠出現(xiàn)象。這表明形環(huán)雖可實現(xiàn)138左右的超高壓密封,但若介質(zhì)壓力繼續(xù)升高則需考慮使用形環(huán)與三角墊的組合密封結(jié)構(gòu)或利用其他密封途徑加以解決,但本文所探討的影響密封性能的主要參數(shù)的確定方法仍有一定的參考意義。徐州師范大學本科生畢業(yè)設(shè)計（論文）任務書院系：機電工程學院 專業(yè)：機械設(shè)計制造及其自動化 班級：03機制44 姓名：邰大勇 學號：03281128一、設(shè)計題目： GKZ高空作業(yè)車液壓和電氣控制系統(tǒng)設(shè)計二、設(shè)計任務要求及主要原始材料：設(shè)計任務要求： 1、收集、分析、消化原始資料 。2、確定高空作業(yè)車的主要技術(shù)參數(shù)和設(shè)計依據(jù)。 3、液壓和電氣控制系統(tǒng)設(shè)計，相關(guān)元器件的選擇與計算。 4、繪制標準液壓和電氣控制原理圖，編制畢業(yè)設(shè)計說明書。主要原始材料：類別項目單位數(shù)據(jù)GKZ高空作業(yè)主 要 性 能 參數(shù)平臺額定載荷200平臺最大作業(yè)高度14平臺最大作業(yè)高度時作業(yè)幅度1.9平臺最大作業(yè)幅度5.6平臺最大作業(yè)幅度時作業(yè)高度7.7回轉(zhuǎn)速度02最大起重量1300最大起升高度9三、設(shè)計時間： 2007年 4月 9 日 至 2007 年 6 月 8 日指 導 教 師：（簽名） 年 月 日院（系）主 任：（簽名） 年 月 日存檔日期： 存檔編號： 徐 州 師 范 大 學本科生畢業(yè)論文（設(shè)計）論 文 題 目：GKZ高空作業(yè)車液壓和電氣控制系統(tǒng)設(shè)計姓 名： 邰 大 勇 院 系： 機 電 工 程 學 院 專 業(yè) 、年 級 、班 組 ： 機械設(shè)計制造及其自動化 03機制44 指 導 教 師： 蔣 紅 旗 徐州師范大學教務處印制 2007年 6 月 8 日目 錄摘要3第一章 緒論 31.1 空作業(yè)車的的現(xiàn)狀和發(fā)展趨勢61.2 課題的來源和意義8第二章 液壓系統(tǒng)設(shè)計 92.1 本參數(shù)及主要技術(shù)性能指標 92.1.1 行駛狀態(tài)主要技術(shù)參數(shù) 9 2.1.2 作業(yè)狀態(tài)主要技術(shù)參數(shù) 9 2.1.3 作業(yè)車平臺作業(yè)工作狀態(tài)圖 9 2.1.4 機構(gòu)簡述 112.2 液壓系統(tǒng)的構(gòu)成13 2.3 各系統(tǒng)工作原理簡述132.4 主要機構(gòu)液壓回路的設(shè)計與分析14 2.4.1 升機構(gòu)的回路設(shè)計 14 2.4.2 伸縮機構(gòu)回路設(shè)計 162.4.3 回轉(zhuǎn)機構(gòu)回路設(shè)計 17 2.4.4 變幅機構(gòu)回路設(shè)計 17 2.4.5 整體液壓回路設(shè)計 182.5 主要液壓元氣件的選擇與計算202.5.1 液壓泵的確定 202.5.2 上下臂液壓缸確定 212.5.3 液壓馬達選擇 232.5.4 換向閥的選擇 242.5.5 油箱有效容的積確定 25第三章 電氣控制系統(tǒng)設(shè)計 263.1 電氣控制方案的確定 26 3.1.1 高空作業(yè)機構(gòu)的電氣控制電路 26 3.1.2 通訊裝置 27 3.1.3 選擇開關(guān)裝置 27 3.1.4 總的控制電路 27 3.2 電氣元器件的選擇 28 3.2.1 按鈕的選用 28 3.2.2 行程開關(guān)的選用 30 3.2.3 熱繼電器的選用 30 3.2.4 熔斷器的選用 303.2.5 電線的選擇 313.2.6 照明電器選擇 313.2.7 變壓器的選擇 32第四章 電氣控制面板的操作334.1 轉(zhuǎn)臺處控制箱操作面板及其操作件介紹334.2 平臺（吊籃）控制箱操作面板及操作元件344.3 高空作業(yè)電氣部分操作方法354.4 高空作業(yè)操作中注意事項35附錄37附錄1 37附錄2 37附錄3 39附錄4 39附錄5 40結(jié)論42后記43參考文獻44GKZ高空作業(yè)車液壓和電氣控制系統(tǒng)設(shè)計摘 要高空作業(yè)車廣泛用于建筑、市政、機場、工廠、園林、住宅等場所，從事消防、搶險救災、安裝、維護等工作。本文針對徐州海倫哲工程機械有限公司GKZ14型高空作業(yè)車，進行了大量的理論研究和實驗測試。本設(shè)計是對該車的重要組成部分-液壓系統(tǒng)和電氣控制系統(tǒng)進行設(shè)計和研究，其液壓系統(tǒng)由上車液壓系統(tǒng)和下車液壓系統(tǒng)組成。兩者之間由中心回轉(zhuǎn)接頭連接(垂直升降式高空車除外),上車液壓系統(tǒng)由變幅系統(tǒng)、伸縮系統(tǒng)和回轉(zhuǎn)系統(tǒng)三個基本系統(tǒng)組成。在整個液壓系統(tǒng)設(shè)計中，采用制動器控制克服了液壓馬達存在內(nèi)泄而平衡閥不能鎖住停在空中的重物，使重物可靠地停在空中。制動器采用恒壓外控，可以進一步降低平衡閥的開啟壓力，提高回路效率。從安全性、可靠性角度看，高空車不同于一般的工程機械, 其特點是作業(yè)頻率不高, 負荷較小, 但要求安全性, 可靠性較高。因此, 高空車應具備緊急停止裝置。高空車在各執(zhí)行機構(gòu)動作的終點位置設(shè)限位裝置, 尤其是對于折疊臂式及混合臂式的高空車應設(shè)中臂限位裝置, 以確保整車的穩(wěn)定性。高空車的變幅系統(tǒng)和伸縮系統(tǒng)的速度必須加以控制, 以防止產(chǎn)生“超速”現(xiàn)象。因此，為保證高空作業(yè)車的工作穩(wěn)定、可靠、安全，作業(yè)靈活，效率高，設(shè)計出優(yōu)良的液壓系統(tǒng)和電氣控制系統(tǒng)就顯得尤為重要。 關(guān)鍵詞：高空作業(yè)車；制動器；內(nèi)泄；恒壓外控；限位裝置。Hydraulic and electricity control system design of the high-altitude working machineAbstractThe high-altitude working machine has been widely used in architecture, city planning, airport, factory, garden, house and other place. It plays an important role in fire protection, dealing with an emergency, construction, installation, maintenance and so on. Aiming at the GKZ14 high-altitude working machine of XhZhou HaiLun machinery Group, It does a lot of theoretical research and experiment test.This design is carries on the design and the research to this vehicleimportant constituent - hydraulic system and the electricitycontrol system, its hydraulic system by boards the hydraulic systemand alights the hydraulic system to be composed. Two between (verticalfluctuation type upper air vehicle is an exception) by the centerswivel joint connection, boards the hydraulic system by the amplitudesystem, the expansion and contraction system and the rotary systemthree basic systems is composed. In the entire hydraulic systemdesign, used the brake control to overcome in the oil motor existenceto release but the by-pass valve not to be able to lock in stops inthe airborne heavy item, caused the heavy item reliably to stop inairborne. The brake uses outside the constant pressure to control, mayfurther reduce the by-pass valve to open the pressure, enhances thereturn route efficiency.From the security, the reliable angle looked that, the upper airvehicle is different with the general project machinery, it scharacte ristic is the work frequency is not high, load smaller, butthe request security, the reliability is higher. Therefore, the upperair vehicle should have the urgent stop device. The upper air vehiclesupposes the spacing installment in each implementing agency movementend position, regarding folds the arm type and the mix arm -like upperair vehicle in particular should suppose the arm spacing installment,guarantees the entire vehicle the stability. The upper air vehicleamplitude system and the expansion and contraction system speed mustperform to control, prevents the production overspeed thephenomenon.Therefore, for guaranteed work high above the ground vehicle workstable, reliable, safe, work nimble, the efficiency is high, designs the fine hydraulic system and the electricity control system appears especially importantly.Keywords: The high-altitude working machine; braker, iternal leakage;external control with constant voltage;The installment limits the position.