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摘要
塔式起重機(jī)是為了滿足高層建筑施工、設(shè)備安裝而設(shè)計的新型起重運輸機(jī)械，本次設(shè)計的塔式起重機(jī)為水平臂架，小車變幅，上回轉(zhuǎn)自升式多用途塔機(jī)。該機(jī)能夠隨建筑高度的升高而加升，具有占地面積小和拆裝方便等優(yōu)點，塔機(jī)上部能借助于液壓頂升機(jī)構(gòu)，根據(jù)施工的建筑物的增高而相應(yīng)地升高，使司機(jī)操作方便，視野寬并始終保持高清晰。
本設(shè)計的題目是QTZ40塔式起重機(jī)—變幅系統(tǒng)的設(shè)計，主要設(shè)計理念是通過參照同類塔式起重機(jī)進(jìn)行設(shè)計。此次設(shè)計的QTZ40塔式起重機(jī)形式為上回轉(zhuǎn)液壓頂升自動加節(jié)，固定式高度為30米，在附著狀態(tài)下可達(dá)到100米，其工作幅度為40米。本機(jī)性能先進(jìn)，結(jié)構(gòu)合理，操作使用安全可靠．其主要特點是起重高度大，工作幅度寬。
本設(shè)計書主要包括三部分：第一部分是QTZ40塔式起重機(jī)總體方案的選擇及總體設(shè)計計算過程；第二部分是變幅機(jī)構(gòu)的設(shè)計與計算：包括變幅機(jī)構(gòu)的形式、確定卷筒尺寸、選擇電動機(jī)、減速器、制動器、聯(lián)軸器；驗算實際變幅速度 驗算起、制動時間；電動機(jī)發(fā)熱驗算；卷筒強(qiáng)度的計算；第三部分是變幅小車的設(shè)計：包括變幅小車的形式、變幅小車的強(qiáng)度計算。
關(guān)鍵詞：QTZ40塔式起重機(jī) 總體設(shè)計： 變幅系統(tǒng)
ABSTRACT
Tower cranes are to meet high-rise construction building, equipment installation and design as a new type machinery of lifting transport. The design of Tower crane is horizontal boom, trolley luffing, on the back or decanted from the tower-type multi-purpose machines . To the building of the height of the rise and add up, this crane covers an small area and open a convenient advantages of the tower on top of the department have the promotion, according to the construction of buildings improves and correspondingly increase, the driver is easy to operate with wide and remained high.
The design of the topic was QTZ40 tower crane-minus its finite luffing system design. My design concept is refered to similar crane under design QTZ40 crane. There are many forms, the design form for the promotion and hydraulic automatic increase in fixed for 30 meters in height, which can achieve 100, the rate is 40 meters. The crane have good performance, logical structure and operation of using safe ． Its main characteristics are lifting a great job in the wide ．
This design mainly includes three parts: the first is the QTZ40 tower crane overall scheme selection and overall design calculation process;
The second part is to become the design and calculation of Trolley travelling:Include to become a form of organization, certain book tube size, choose electric motor, decelerate a machine, make a machine, allied stalk machine;Check to calculate to physically become speed to check to start to calculate and make time;The electric motor has fever to check to calculate;The calculation of book tube strength;The third part is to become the design of a small car:Include to become a form of small car and become the strength calculation of a small car.
Keywords: QTZ40 tower crane The total design：luffing system