汽車起重機是輪式起重機的一種。通常習慣把裝在通用或專用載重汽車底盤上的起重機稱為汽車起重機。汽車起重機的金屬結構以回轉平臺為界，分為上車和下車兩部分。上車部分由起重臂架、人字架、配重、回轉平臺和起重司機室組成；下車部分由車架、汽車司機室和支腿組成。上車部分可以相對下車部分旋轉。起重機的金屬結構將起重機連接成一個整體，承受起重機的自重以及作業時的各種外載荷。工作半徑不小于270°，雙H型支腿同步伸縮臂式汽車起重機。其額定起重量為10T,系統正常工作壓力為16MPa。文中通過對QY10起重機進行總體性能分析，最終確定了一些結構參數，并對起重機總機進行了的牽引力和穩定性計算。
支腿在起重機工作時，支撐著整個機重和外載荷重量，要求安全可靠，如發生支腿自縮，就有使整個起重機傾翻的危險。因此在支腿機構設計時，著重從安全保障方面入手，在支腿油路中設置了雙向液壓鎖元件，且直接安裝在垂直液壓缸上，防止管路破壞或液壓缸活塞密封圈損壞時發生事故，而且當行駛或停放時，支腿也不會在重力作用下自動下降。為了提高效率及整機調平需要，單個垂直液壓缸即可同時伸縮又可單獨伸縮。為了保證結構有較好的密封性，設計使用了性能較為可靠的由派克公司生產的密封圈。另外對于橫向伸縮箱的截面形狀也進行了可靠性驗算。
關鍵詞：汽車起重機 支腿機構 液壓
ABSTRACT
Truck Crane is a kind of crane. It is usually used in general or put on the special truck chassis crane .It called cranes. The truck crane metal structure Divided into two parts of the truck with platform for boundary. Top truck is composed of Crane Boom, Renzi Jia, weight, rotary platform and crane cab; The lower part of truck is composed of Frame, drivers room and leg.Top truck and lower truck can be relative rotation. Crane metal structure will be connected into a whole,And crane under the crane self-reverence and various load at working. The working radius is not less than 270 °, H-double outrigger synchronized telescopic boom truck crane. The rated weight of the machine is 10T, the normal system pressure is 16MPa.Based on the analysis to the total function of the QY10truck crane ,we at last assurance some structure parameters ,and do calculations of the loading dint and stability of the whole machine.
When the crane working, the Outrigger will support the entire weight of the machine and the outside loading, so safety and reliability is required. If the outrigger retracted itself, there is a danger that the whole truck would turn over. Therefore, in outrigger designing, it should be focused on the aspects of safety.The outrigger Circuit set up a two-way hydraulic lock components, and installed directly on the vertical hydraulic cylinder, to prevent from the accident when pipe or hydraulic cylinder piston ring is damaged. And when driving or parked, the outrigger will not automatically fall under gravity. In order to improve efficiency and leveling needs, the vertical telescopic hydraulic cylinders can stretch and shrink together or singly. And the credibility calculate to the shape of the horizontal box is done at last.
Key words: truck crane Outrigger Agency Hydraulic
第一章 概述 1
1.1引言 1
1.2國內外汽車起重機的發展趨勢 3
1.3國內汽車起重機產品差距主要表現 6
1.4汽車起重機產品的發展趨勢 7
第二章 總體設計 9
2.1總體參數的確定 9
2.2汽車起重機底盤類型的選擇 10
2.3設備組成及其功能分析 13
2.4汽車起重機移動性能分析 15
2.5對整機進行牽引計算 17
第三章 液壓系統的設計 18
3.1液壓系統型式 18
3.2液壓系統的控制 20
3.3液壓系統設計 21
3.4支腿油路的設計 26
第四章 支腿機構的設計和校核計算 27
4.1支腿形式的選擇 27
4.2支腿壓力的計算 28
4.3垂直支腿液壓缸的設計計算 33
4.4液壓缸結構參數的計算 35
4.5液壓缸的連接計算 36
4.6 活塞桿穩定性驗算 37
4.7 橫向伸縮箱截面的計算 38
4.8 支腿垂直液壓缸與伸縮箱的連接 40
第五章 支腿工作穩定性分析及操作工藝流程分析 43
5.1支腿工作穩定性 43
5.2支腿機構打軟腿的危害與防止措施分析 44
5.3 起重機操作工藝流程分析 45
參考文獻
畢業設計小結
附：英文翻譯
英文原文
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