大型礦用自卸車靜液壓傳動系統(tǒng)設(shè)計

購買設(shè)計請充值后下載，資源目錄下的文件所見即所得，都可以點開預(yù)覽，資料完整，充值下載可得到資源目錄里的所有文件?！咀ⅰ浚篸wg后綴為CAD圖紙，doc,docx為WORD文檔，原稿無水印，可編輯。具體請見文件預(yù)覽，有不明白之處，可咨詢QQ:12401814 黑龍江工程學(xué)院本科生畢業(yè)設(shè)計附錄1 自卸車舉升系統(tǒng)設(shè)計淺談?wù)?本文通過對自卸車的簡要設(shè)計分析, 針對長度較大的重型自卸車的特點, 從舉升系統(tǒng)的結(jié)構(gòu)設(shè)計及液壓設(shè)計方面提出了相應(yīng)的措施, 對重型自卸車的舉升系統(tǒng)設(shè)計有一定的指導(dǎo)作用。關(guān)鍵詞:重載；舉升；系統(tǒng)1、自卸車主要結(jié)構(gòu)自卸車的結(jié)構(gòu)主要包括舉升系統(tǒng)、底盤、副車架、車廂等組成,2、舉升機構(gòu)設(shè)計分析重型自卸車舉升系統(tǒng)在設(shè)計過程中需要解決的主要問題包括:舉升形式的選取、車箱在舉升過程中的穩(wěn)定性、前后橋的軸荷分配合理性及液壓系統(tǒng)的可靠性。下面將通過底盤上設(shè)計7.2米自卸車這一具體事例,闡述自卸車舉升機構(gòu)系統(tǒng)設(shè)計的一般思路。2.1初步確定車廂容積根據(jù)二類底盤的參數(shù):軸距3900mm+1350mm,后懸900mm,載質(zhì)量17500kg,及整后懸為1600mm的要求,車箱尺寸確定5600mm*2300mm*1500mm。初步確定車箱在底盤上的位置為車箱后端出去底盤車架后端870mm。在確定舉升形式后,需要再通過分析計算前后橋的軸荷分配情況,驗證車箱在二類車上的位置是否合理。2.2舉升形式的確定自卸車常用的舉升形式主要是有F式、T式、前置直頂式等形式。要在F式、T式、前置直頂式三種舉升形式中確定一種最合適的,就需要分別就三種情況進行分析校核。三種舉升形式各有其優(yōu)缺點,前置直頂式結(jié)構(gòu)緊湊、舉升效率高。工藝簡單、成本較低。但舉升后穩(wěn)定性差,對路面情況要求較高;F式和T式舉升機構(gòu)橫向鋼度好、舉升轉(zhuǎn)動圓滑平順,油缸活塞的工作行程短,但舉升力系數(shù)較大。為了確定究竟選用哪一種舉升形式最合適,筆者分別就三種情況做了理論分析。如果選用F式和T式舉升形式,最重要的對其舉升力系數(shù)進行計算比較。經(jīng)計算F式舉升形式的舉升力系數(shù)最小是1.751,T式舉升形式舉升力系數(shù)最小是1.799,都不是很理想(通常舉升力系數(shù)為1.61.7時效果較好)。而前置直頂式油缸舉升力T大于8噸就可以了?？紤]到采用F式或T式舉升機構(gòu),舉升非常費力,需要大的舉升油缸,而且對三角臂等要求很高,不易實現(xiàn)。結(jié)合前述的分析,決定采用前置直頂式舉升形式。2.3提高舉升穩(wěn)定性措施因本次設(shè)計的車箱長度較大,同時又采用前置直頂式舉升形式,所以車箱的穩(wěn)定性非常重要,需要采取措施來提高車廂舉升過程中整車的穩(wěn)定性,防止整車發(fā)生側(cè)翻。通常情況自卸車車箱連接設(shè)計采用鉸軸與副車架連接,副車架通過U型螺栓和連接板與主車架連接的結(jié)構(gòu)。本次設(shè)計我們采用了新的結(jié)構(gòu),扁鋼通過焊在側(cè)面的連接板用螺栓固定在主車架上,這樣就大大降低了整車的重心,增加了穩(wěn)定性。由于車箱是通過鉸軸和鉸軸座來實現(xiàn)舉升轉(zhuǎn)動的,鉸軸座有一定高度現(xiàn)在用扁鋼替代了副車架,鉸軸座需要安裝在主車架縱梁上翼面以下,因此在主車架后端需要安裝一個Z型的橫梁來支撐后鉸軸座,Z型的橫梁總成通過螺栓固定在車架后端,同時兩鉸軸座之間的距離盡量加大,以增加車箱舉升時的穩(wěn)定性。因車箱長度較大,設(shè)計時需考慮采用了穩(wěn)定裝置來增加整車穩(wěn)定性,穩(wěn)定裝置安裝在車廂中部偏前的位置。車箱安全撐桿設(shè)計在車架左右縱梁之間,形式簡單,安全可靠,操作方便。考慮到車箱舉升后,鉸軸座處受力非常大,因此在鉸軸座處需采用加強措施,以增加對鉸軸座的支撐力。3、舉升機構(gòu)液壓系統(tǒng)設(shè)計前置直頂式的液壓傾卸機構(gòu)包括齒輪油泵、液壓油缸、舉升操縱閥、舉升閥、液壓油箱、管路、舉升機構(gòu)。液壓系統(tǒng)我們采用了先進的三回路系統(tǒng)。液壓控制系統(tǒng)工作原理圖,。在三回路的自卸車系統(tǒng)中,油液會通過流向油缸的唯一油路返回泵閥總成,在油液返回油箱的過程中,泵中的閥將會引導(dǎo)油液通過另一條油路,它只被用作返回油路,因為在大多數(shù)出色的油路設(shè)計中,回程油路中會安裝使用容量為100gpm的過濾器,來過濾要進入油泵的污物,延長泵中零件的使用壽命。三回路系統(tǒng)的主要優(yōu)點在于:保證潔凈的油液會始終供給油泵,而不至于當(dāng)自卸車在中位或保持位置時的供油只依靠泵在轉(zhuǎn)動時的內(nèi)部容積。3.1主要部件的選擇液壓系統(tǒng)主要采用海沃系統(tǒng),液壓油缸選用海沃多級套筒缸。3.2液壓油缸安裝位置的確定安裝直頂式液壓油缸要求車箱和駕駛室之間有足夠的空間,經(jīng)研究二類底盤的布置,駕駛室后面的消音器需要移動位置。因取消了副車架,液壓油缸需要安裝在主車架兩縱梁之間,利用主車架上的孔,設(shè)計了一個液壓油缸安裝座總成。安裝座用螺栓固定在主車架左右縱梁上,液壓油缸支撐軸再安裝在安裝座上,液壓油缸支架固定在車箱前板上。4、 結(jié)束語以上是自卸車舉升系統(tǒng)的設(shè)計過程,本次設(shè)計的的主要特點就是在整車長度較大的自卸車中采用前置直頂式舉升機構(gòu),液壓系統(tǒng)為三回路系統(tǒng),采用泵閥一體式結(jié)構(gòu),工作原理簡單,結(jié)構(gòu)新穎;同時通過采用新結(jié)構(gòu)解決了在舉升過程中車廂的穩(wěn)定性問題。通過以上一個具體車型舉升系統(tǒng)設(shè)計過程的介紹,也可以反映自卸車舉升系統(tǒng)的一般設(shè)計思路。附錄2A Brief Description of Lift Truck System Design Abstract： In this paper, dump truck through a brief design analysis, in view of the length of the larger features of heavy-duty dump truck, lifting the system from node Structure design and hydraulic design of the corresponding measures for the lifting of heavy truck design a certain guiding function. Key words： heavy-duty；lifting；system1. The main structure of dump truck Dump truck, including the structure of the main lift system, chassis, frame, vice,component compartments, 2. lifting body design and analysis Heavy-duty dump truck lifting system in the design process of the main issues that need to be addressed include: lifting forms of selection, in the lift car in the process of stability, before and after the bridge, the reasonableness of axle-load distribution and hydraulic system reliability. Chassis by following the design of 7.2 meters on concrete examples of the dump truck, dump truck lifting mechanism on the general idea of system design. 2.1 Compartment volume to determine initial Chassis in accordance with the parameters: Wheelbase 3900mm +1350 mm, rear overhang 900mm, set the quality of 17500kg, and the whole 1600mm rear overhang for the request to determine car-size 5600mm * 2300mm * 1500mm. Determine the initial car position in the chassis for the car back out of theback-end chassis frame870mm. In determining the form of lifting, the need for further analysis of Count before and after the bridge and axle-load distribution of the car to verify the location of the vehicle in the second category is reasonable. 2.2 determine the form of lifting Lift truck used mainly in the form of F-type, T-style, front-straight top form. In F-type, T-style, front-straight top three identified in the form of lifting one of the most suitable, we need three conditions on the analysis of calibration. Lift the form of the three has its own advantages and disadvantages of pre-straight-top compact structure, lifting and high efficiency. Simple process with low costs. However, after lifting the stability of poor road conditions on the higher; F-type and T-type lifting mechanism a good degree of cross-cutting steel, smooth lifting smooth rotation, the fuel tank of the work piston short trip, but the lift coefficient than the Great. In order to determine whether the choice of what kind of lifting the most appropriate form, the author of three cases were done on the theoretical analysis. If the selected F-type and T-type lifting form, the most important of its calculated lift coefficient comparison. By calculating the F-type forms of lifting lifting the smallest coefficient is 1.751, T-type lifting the smallest form of lift force coefficient is 1.799, it is not ideal (usually lift coefficient of 1.6 to 1.7 when the effect of better). The front straight top edge lifting the fuel tank T is greater than 8 tons of it. Taking into account the use of F-type or T-type lifting mechanism, very easy lifting, lifting the need for large tanks, but also to the triangular arm, such as demanding and difficult to achieve. Combination of the foregoing analysis, decided to adopt the prefix form of straight Lift top. Lifting measures to improve the stability of 2.3 Due to the design of thelength of the larger car, at the same time, the use of pre-straight lifting top form, so the stability of car is very important, need to take measures to improve the process of lifting carriage vehicle stability, prevent the occurrence of vehicle rollover. Dump Truck car normally used to connect the design of hinge axis and sub-frame connection, the Deputy frame through the U-bolts and connect the main frame structure. The design we have adopted a new structure, flat steel, through welding at the side of fixed with bolts on the main frame, thus greatly reducing the vehicles center of gravity to increase stability. As the car through the hinge axis and the hinge axis to achieve the lifting Block rotation, hinge axis blocks now have a high degree of flat steel to replace the Vice-trailers will need to install seat hinge axis frame in the main beam on the wing surface below the main Frame back-end need to install a Z-shaped beams to support Block after the hinge axis, Z-shaped beam through the bolt assembly back-end fixed in the frame, while the two-axis hinge as much as possible the distance between blocks to increase to increase the car example or stability. Due to the length of the larger car, the design would have to consider the stability of devices used to increase vehicle stability, the stability of the central unit installed on the inside of the location of the former side. Car safety design in the frame around pole between the longeron, the form of simple, safe, reliable, easy to operate. After taking into account the lifting carriage, Block Department hinge axis force is very large, and therefore hinge axis in the Block Office, to strengthen measures to be adopted to increase the hinge axis of the support seat edge. 3. Hydraulic Lift System Design Pre-straight top-style, including the dumping of hydraulic gearpumps,hydraulic cylinder, control valve lift, valve lift, hydraulic tanks, piping, lifting mechanism. Hydraulic system we use an advanced three-loop system. Hydraulic control system schematics,. The dump truck in the three-loop system, the oil will flow to the fuel tank through the valve assembly to return to the only circuit in the oil return to tank, the pump will help to guide the valve through a separate oil circuit only be used as a return circuit, because in most excellent circuit design, the return will be installed in circuit capacity 100gpm use filters to filter the dirt to enter the pump to extend the use of pump parts life. Three-loop system, the main advantages are: to ensure that clean oil will always supply pumps, and not when the dump truck in the position or to maintain only the reliance on the oil pump in the internal volume rotation. 3.1 The main components to choose Hydraulic system is mainly used hiwassee systems, hydraulic cylinder hiwassee selected multi-level cylinder sleeve. 3.2 hydraulic cylinder installation to determine the location The installation of hydraulic cylinder straight-top car and the drivers request there is enough room between that having studied the arrangement of second-class chassis, the cab behind the need to move the location of muffler. The abolition of the Vice-frame, hydraulic oil tanks need to install a beam in the main frame between the two, using the hole on the main frame, the design of the installation of a hydraulic cylinder assembly seat. Block with bolts installed in the main frame about a fixed beam, the hydraulic cylinder support shaft and then installed in theinstallation of seat, hydraulic cylinder brackets before the board in the car. 4. Concluding remarks These are the lift truck system design process, the main features of the design is the length of the vehicle used in large dump truck front straight top lifting body, the hydraulic system for the three-loop system, the use of pump valve all-in-one structure, working principle of simple and novel structure; At the same time, through the introduction of new structures to solve the process of lifting the car stability. Through more than a specific model of the lifting system of the design process, the lift truck can also reflect the general design of the system.9大型礦用自卸車靜液壓傳動系統(tǒng)設(shè)計專業(yè)：計算機輔助設(shè)計與制造 姓名： 指導(dǎo)教師： 摘要：大型礦用自卸車是現(xiàn)代礦山企業(yè)重要的運輸工具之一，目前普遍使用的是大型電動輪自卸車，已暴露出其體積龐大、重量大、故障率高等缺點。由于靜液壓傳動具有工作平穩(wěn)、沖擊小、重量輕、無級調(diào)速及調(diào)速范圍大、易于實現(xiàn)自動化、在惡劣工作條件下相對電傳動性能更可靠等優(yōu)點，近年來發(fā)展迅速，已受到車輛傳動領(lǐng)域的廣泛重視。在分析了礦用電動輪自卸車電動輪傳動型式、工作條件及負載變化后，參考由湘潭電機集團有限公司生產(chǎn)的108t電動輪自卸車，結(jié)合靜液壓傳動的優(yōu)點，設(shè)計了大型礦用自卸車的靜液壓傳動系統(tǒng)，驅(qū)動是由四個液壓馬達輸出扭矩驅(qū)動車輛的四輪驅(qū)動型式，采用雙泵供油的閉式變量系統(tǒng)；鑒于轉(zhuǎn)向和舉傾不同時發(fā)生，在設(shè)計中采用舉傾時雙泵合流的供油方式，從而充分利用了發(fā)動機功率，減少了能量損耗；同時還對大型礦用自卸車的制動性能進行了分析，能夠滿足其制動要求。關(guān)鍵詞：礦用自卸車；電動輪自卸車；靜液壓傳動Abstract：The heavy duty mineral Self-Dumping Truck is one of the important transport means in modern mine enterprise. The heavy duty Electric - Wheeled Self - Dumping Truck is widespread at present. But it has huge size, heavy weight, high failure and so on. Because the hydrostatic transmission device works steadily and is easily to realize the automation and is of small impact, light weight, large variable speed range and enabled to step-less speed and under the bad working conditions, the hydrostatic transmission device is of more reliable performance than electrical transmission device. It develops rapidly in recent years. It has been valued by more and more people in vehicle transmission. By analyzing the Electric-wheel drive forms, working conditions and variation of load of the mineral Electric - Wheeled Self-Dumping Truck, this paper designs the hydrostatic driving system of the heavy duty mineral Self-Dumping Truck using hydrostatic merits, refer to the 108t Electric-Wheeled self - Dumping Truck which produced by the Xiangtan Electric Manufacturing Corporation LTD. The Truck is four-wheel-drive vehicle type. There are four hydraulic motors output torque to drive vehicle. The hydraulic system which supplied flow and pressure by double-pumps is closed variable system. Due to the turning and dumping occur at different time, two pumps merge their flow to supply system when dumping. This means makes full use of engine power and reduces energy loss. Braking performance of the heavy duty mineral Self-Dumping Truck is also analyzed in this paper and it is meet the requirements of its braking. Keywords: The mineral Self-Dumping Truck, The Electric - Wheeled Self - Dumping Truck, Hydrostatic transmission 1緒論11大型礦用電動輪自卸車的現(xiàn)狀及發(fā)展自1963年研制出第一臺裝載質(zhì)量為77t電動輪自卸車以來，重型礦用電動輪自卸車已發(fā)展成熟。目前重型礦用電動輪自卸車驅(qū)動的傳動方式都是采用交-直流傳動，12 現(xiàn)代液壓技術(shù)的發(fā)展 液壓技術(shù)是現(xiàn)代化傳動與控制的關(guān)鍵技術(shù)之一，各國對液壓工業(yè)的發(fā)展都很重視。為滿足國民經(jīng)濟發(fā)展，我國液壓技術(shù)也將獲得飛速發(fā)展，在各個工業(yè)部門中的應(yīng)用越來越廣泛。13 大型礦用自卸車用靜液壓驅(qū)動的可行性與優(yōu)越性靜液壓傳動裝置以液壓泵和液壓馬達為主組成，附加變量控制單元和傳動元件，成為一種無級變速的傳動裝置。靜液壓傳動與電動輪自卸車上采用的電傳動相比，有很多優(yōu)點，車輛合理運用靜液壓驅(qū)動，能提高生產(chǎn)效率，節(jié)省能量消耗，使機器品質(zhì)上升到一個新的臺階。14 本設(shè)計的任務(wù)和目標通過對湘潭電機廠生產(chǎn)的108t大型自卸車相關(guān)參數(shù)的分析，將其驅(qū)動型式改為靜液壓驅(qū)動，設(shè)計出靜液壓驅(qū)動系統(tǒng)、轉(zhuǎn)向系統(tǒng)和舉升系統(tǒng)并驗算其性能。2主要技術(shù)參數(shù)及對液壓系統(tǒng)的要求21 主要技術(shù)參數(shù)最大載重量：108t 車輛自重：85t車廂重量：19t 最高行駛速度：50km/h最大爬坡度：17% 卸料舉升時間： 20 s輪邊減速器傳動比：2735液壓系統(tǒng)壓力：行走系統(tǒng)： 33MPa；舉升系統(tǒng)： 25MPa；轉(zhuǎn)向系統(tǒng)： 20MPa22 主機對液壓系統(tǒng)的要求重型礦用自卸車在礦山條件下工作，工作條件比較惡劣，而且主機經(jīng)常處于經(jīng)常處于起制動狀態(tài)，外負載和沖擊很大，同時，希望自卸車的生產(chǎn)率盡可能大。3靜液壓驅(qū)動系統(tǒng)的設(shè)計31 液壓驅(qū)動系統(tǒng)的型式及方案確定驅(qū)動系統(tǒng)有容積調(diào)速系統(tǒng)和功率分流液壓調(diào)速系統(tǒng)，大型礦用自卸車用容積調(diào)速系統(tǒng)。根據(jù)不同的分類方法，液壓系統(tǒng)型式主要有：開式和閉式系統(tǒng)，定量和變量系統(tǒng)，容積調(diào)速、節(jié)流調(diào)速和容積節(jié)流調(diào)速系統(tǒng)等。大型礦用自卸車由于環(huán)境、負載、自身性能等的要求，選用閉式變量容積調(diào)速系統(tǒng)。液壓驅(qū)動系統(tǒng)傳動方案有三種，一是用定量液壓馬達驅(qū)動，二是用一組變量液壓馬達，三是全部采用變量泵和變量馬達驅(qū)動。大型礦用自卸車要求高速大扭矩，變速范圍大，用變量泵和變量馬達驅(qū)動方案。32 行走驅(qū)動系統(tǒng)性能的主要參數(shù)決定驅(qū)動行走系統(tǒng)性能的主要技術(shù)參數(shù)有：行駛驅(qū)動功率、牽引力、車速、最大爬坡度等。33 液壓傳動系統(tǒng)的設(shè)計計算本節(jié)通過一系列計算確定液壓傳動和車輛數(shù)據(jù)，繪制出相應(yīng)的曲線，從而確定車輛在其整個運轉(zhuǎn)范圍內(nèi)的特性。34 擬定驅(qū)動液壓系統(tǒng)工作原理圖擬定的驅(qū)動系統(tǒng)工作原理圖如圖3.1所示。圖3.1 驅(qū)動系統(tǒng)工作原理圖4液壓轉(zhuǎn)向系統(tǒng)的設(shè)計41 轉(zhuǎn)向系統(tǒng)基本要求及轉(zhuǎn)向方式車輛利用轉(zhuǎn)向系統(tǒng)來改變其行駛方向或保持直線行駛，應(yīng)能保持直線行駛的穩(wěn)定性并能靈活地改變行駛方向。輪式車輛轉(zhuǎn)向方式主要有偏轉(zhuǎn)輪轉(zhuǎn)向、鉸接轉(zhuǎn)向和滑移轉(zhuǎn)向。大型礦用自卸車采用偏轉(zhuǎn)前輪的轉(zhuǎn)向方式。42 液壓轉(zhuǎn)向系統(tǒng)方案的選擇輪式車輛液壓轉(zhuǎn)向系統(tǒng)綜合起來有兩種形式：液壓助力轉(zhuǎn)向和全液壓轉(zhuǎn)向。大型礦用自卸車速度不高于50km/h，要求系統(tǒng)布置方便，安裝適應(yīng)性好等，選用全液壓轉(zhuǎn)向系統(tǒng)。43 液壓轉(zhuǎn)向系統(tǒng)設(shè)計計算液壓轉(zhuǎn)向系統(tǒng)的設(shè)計主要是確定轉(zhuǎn)向阻力矩、轉(zhuǎn)向油缸、轉(zhuǎn)向器以及油泵參數(shù)。44 擬定液壓轉(zhuǎn)向系統(tǒng)工作原理圖擬定的液壓轉(zhuǎn)向系統(tǒng)工作原理圖如圖4.1所示。該系統(tǒng)由油泵1、轉(zhuǎn)向器3、油缸4等組成。當(dāng)轉(zhuǎn)動轉(zhuǎn)向器的時，油液經(jīng)轉(zhuǎn)向器進入油缸，在油缸活塞上產(chǎn)生足夠的壓力使車輛轉(zhuǎn)向，當(dāng)壓力超過系統(tǒng)壓力時，油液經(jīng)溢流閥直接回油箱，轉(zhuǎn)向器里的雙向緩沖閥使轉(zhuǎn)向平穩(wěn)。圖4.1 液壓轉(zhuǎn)向系統(tǒng)工作原理圖5液壓舉傾系統(tǒng)的設(shè)計51 舉傾系統(tǒng)的限速措施 重型運輸機械產(chǎn)生重力超速現(xiàn)象，需有限速措施。一般有三種方法來防止重力超速：1靠換向閥節(jié)流；2使用單向節(jié)流閥；3使用平衡閥（限速閥）。大型礦用自卸車不要求長時間鎖緊定位，對鎖緊和限速要求不太嚴，選用單向節(jié)流閥的限速措施。52 液壓舉傾系統(tǒng)的設(shè)計計算液壓舉傾系統(tǒng)的設(shè)計計算主要是計算了傾卸油缸行程、內(nèi)徑、容積以及舉升油泵參數(shù)等。53 擬定液壓舉傾系統(tǒng)工作原理圖舉升液壓系統(tǒng)工作原理如圖5.1所示。液壓系統(tǒng)主要由油泵1、舉升分配閥2、下降速度控制閥3、舉升速度控制閥4和液壓缸5組成。油泵將輸出的油直接供給舉升分配閥2，回油通過串聯(lián)在油路上的回油濾清器流回油箱。舉升分配閥內(nèi)置溢流閥，保證系統(tǒng)壓力。圖5.1 舉升液壓系統(tǒng)工作原理圖6 制動性能分析大型礦用自卸車采用全液壓盤式制動，前輪制動盤為單盤三卡鉗，后輪為雙盤雙卡鉗。本章主要分析了其制動力矩和制動力、前后輪附著力及滾動阻力以及制動加速度和制動距離，通過計算，車輛制動距離小于規(guī)定的18m，滿足性能要求。7系統(tǒng)總成大型礦用自卸車轉(zhuǎn)向和舉升不同時進行，若用兩個液壓泵分別供油，那始終有一個液壓泵處于卸荷狀態(tài)，造成發(fā)動機功率浪費，為充分利用發(fā)動機功率，轉(zhuǎn)向舉升采用組合油路供油。最終總成的液壓系統(tǒng)如圖7.1所示。圖7.1 大型礦用自卸車靜液壓傳動系統(tǒng)系統(tǒng)總成后，根據(jù)前面的計算，對系統(tǒng)中各個元件進行了選型設(shè)計。8液壓系統(tǒng)性能驗算完成了系統(tǒng)的基本設(shè)計計算部分之后，還對系統(tǒng)的壓力損失、發(fā)熱溫升及液壓沖擊進行了驗算，以便使所設(shè)計的液壓系統(tǒng)更加可靠和完善。結(jié)論：工程機械液壓傳動系統(tǒng)，和機械傳動系統(tǒng)、電傳動系統(tǒng)一樣，是工程機械整機傳動系統(tǒng)的一種重要的傳動系統(tǒng)之一。由于靜液壓傳動具有機構(gòu)簡單、重量輕、工作平穩(wěn)沖擊小、無級調(diào)速及調(diào)速范圍大、易于實現(xiàn)自動化等優(yōu)點，近年來發(fā)展迅速，已受到車輛傳動領(lǐng)域的廣泛重視。本次畢業(yè)設(shè)計對湘潭電機廠生產(chǎn)的108t電動輪自卸車驅(qū)動、轉(zhuǎn)向和舉升系統(tǒng)作了很大改進。通過對原自卸車電動輪傳動型式、工作條件以及負載變化的分析，本設(shè)計對其驅(qū)動型式由電傳動系統(tǒng)改為靜液壓傳動系統(tǒng)，另為還對其轉(zhuǎn)向和舉升液壓系統(tǒng)作了一定的改進，分析了其制動系統(tǒng)的制動性能，對其液壓系統(tǒng)性能進行了驗算?？梢缘玫饺缦陆Y(jié)論：1靜液壓傳動相對電傳動在惡劣環(huán)境下有可靠性更高，調(diào)速性能更好的優(yōu)點，傳動裝置采用閉式變量系統(tǒng)容易實現(xiàn)車輛的無級調(diào)速，在車輛低速工作時效率較高，對能量的利用率高，能很好地發(fā)揮發(fā)動機的性能。2轉(zhuǎn)向和舉升系統(tǒng)采用舉升時雙泵合流的方式，從而充分利用發(fā)動機的功率，提高作業(yè)效率。3制動用全液壓盤式制動器，熱穩(wěn)定性好，作用滯后時間較短，結(jié)構(gòu)緊湊，效率較高，能夠很好地滿足大型礦用自卸車制動要求。大型礦用自卸車采用靜液壓驅(qū)動有很大的發(fā)展前景，但目前大型礦用自卸車采用靜液壓驅(qū)動尚述空白，本次設(shè)計只是作為一種嘗試和訓(xùn)練。由于作者水平有限，缺乏設(shè)計和實踐的經(jīng)驗，本設(shè)計肯定有不足和缺陷，懇請老師指正。致謝：在一個學(xué)期的畢業(yè)設(shè)計中，我得到了指導(dǎo)老師許焰老師的悉心指導(dǎo)。許老師淵博的知識、巧妙的思維、嚴謹治學(xué)的態(tài)度、豐富的實踐經(jīng)驗給我留下了深刻的印象，使我在知識的應(yīng)用方面得到提高。許老師在自己工作很忙的情況下，堅持每周五指導(dǎo)我們的畢業(yè)設(shè)計，與我們來共同分析問題，討論問題，給予我們很大的幫助，在許老師的指導(dǎo)下，設(shè)計任務(wù)才能順利完成。對許老師的辛勤指導(dǎo)，我表示深深的感謝！在本次設(shè)計中，與本組的幾位同學(xué)在一起討論問題，他們給了我很大的幫助，從中獲益非淺，我與我同寢室的同學(xué)討論、交流設(shè)計心得，使我在設(shè)計中，進一步開闊思路，對此，也表示誠摯的謝意！參考文獻1 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