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河 北 建 筑 工 程 學 院
本科畢業(yè)設計（論文）
題
目
QTZ125塔式起重機結構設計（63m吊臂）
學 科 專 業(yè) 機械設計制造及其自動化
班 級 機094
姓 名 劉競爭
指 導 教 師 張永清
輔 導 教 師
摘要
塔式起重機就是動臂裝在高聳塔身上部的旋轉起重機。其作業(yè)空間大，主要用于房屋建筑施工中物料的垂直和水平輸送及建筑構件的安裝。
本次設計的題目是QTZ125塔式起重機總體、塔身、臂架及起升系統(tǒng)的設計。本設計書主要包括四部分：第一部分主要是對現(xiàn)今國內外塔式起重機的發(fā)展現(xiàn)狀、趨勢以及QTZ125塔式起重機特點、應用場合，做了一個簡要的概述；第二部分是QTZ125塔式起重機總體方案的選擇及總體設計；第三部分是塔身設計和校核、第四部分是頂升機構液壓系統(tǒng)設計及套架校核計算。
總體設計根據(jù)《塔式起重機設計規(guī)范》制定總體設計原則及選擇主要性能技術參數(shù)，然后綜合考慮塔機的強度、剛度、穩(wěn)定性、各種工況下的外載荷以及塔機的經(jīng)濟性，從而選出合理的設計方案。按塔身受載最小的原則確定平衡重的質量；再計算塔機風力和抗傾覆穩(wěn)定性。
塔身設計包括塔身標準節(jié)選取、塔身受力分析、塔身及連接校核。塔身由豎向的立柱和斜向腹桿構成，立柱主要承擔豎向的荷載，腹桿則主要配合立柱受力，它主要在塔身承受扭轉時發(fā)揮作用。塔身受力分工作和非工作兩種狀態(tài)，兩種狀態(tài)分析方法相同。本設計的塔身為獨立式塔身，其力學模型可看作是一端獨立一端自由的壓彎桿件。
起升機構頂?shù)脑O計主要包括電動機、聯(lián)軸器、制動器的選擇，卷筒、吊鉤、
鋼絲繩的選擇。起升機構的主要作用是起升重物。
關鍵詞：塔式起重機 塔身 臂架 起升機構、
ABSTRACT
Tower crane boom is mounted on top of tall rotating tower crane. The work of space and it is mainly used for housing construction in the vertical and horizontal transport of materials and building components of the installation.
The design of the overall topic is QTZ125 tower crane, tower and lifting system. The design of the book consists of four parts: the first is mainly about the current status of the development of tower crane at home and abroad, trends and characteristics of QTZ125 tower crane, applications, made a brief summary; second part of the overall tower crane QTZ125 program selection and design; The third part is the tower design and verification, the fourth part of the lifting body aircraft hydraulic system design and set of checking calculation.
Design under the "design of tower crane" to develop design principles and selection of technical parameters of the main performance, comprehensive consideration of tower crane and the strength, stiffness, stability, different conditions of external load and the tower of the economy, thereby select a reasonable design. According to the principles of the tower to determine the minimum set by the weight of the mass balance; then calculate the wind tower and anti-overturning stability.
Section of the tower design includes standard tower selection, tower stress analysis, the tower and connection check. Tower from the vertical column and oblique abdominal pole structure, the vertical column is mainly responsible for the loading, belly bar with the column is the main force, it is mainly when the tower to withstand reverse play. Tower Subjected to work two jobs and non-state, two states of the same way. The design of the tower as a separate tower, the mechanical model can be seen as bending the free end of one end of the independent bar.
Lifting body design includes hydraulic system design, selection of hydraulic components and systems check, set frame design check. The design of the QTZ125 tower crane and lifting with the section increases in height, type of hydraulic mechanism with the central top.
Keywords: Tower Crane lifting body aircraft hydraulic system Set rack
摘要（三號、黑體、居中）
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