1L4100 柴油機設計（曲柄連桿機構）摘 要本次設計主要針對性設計了 L4100 柴油機的曲柄連桿機構，對這個系統(tǒng)中的各種零部件進行分析相應的分析和設計。由于發(fā)動機作為一臺完整的動力機械的心臟部位，扮演著居足輕重的加角色。首先從整體方面著手，先確定整個機體采用的形式，確定整機的外形尺寸。再著眼于各個細節(jié)部分。將設計任務逐級分配下去，從缸蓋的結(jié)構，氣門傳動組的設計，再到活塞連桿組的連桿、活塞、以及曲軸的設計，最后是相關傳動機構的設置，油底殼的外形尺寸等等一系列的復雜設計，最后組成一臺完整的發(fā)動機。若中間任何一道工序出現(xiàn)差錯，這一項任務的完成就會大打折扣。因此本此設計在著手設計曲柄連桿機構的所有零部件時，都本著精益求精的態(tài)度去完成。由于已經(jīng)給定了發(fā)動機的相關參數(shù)，所以在設計之初就需要對曲柄連桿連桿機構中的每一個構件（包括活塞，連桿，曲軸）我們都采用先分析其相應的運動情況，再以此為依據(jù)設計相關參數(shù)，保證動力學分析時能夠合理有效的進行，最后進行同時相關強度、硬度的校核。根據(jù)最終校核的情況再做出相應的調(diào)整。在保證最大化的輕巧，靈便的同時，保證相關技術要求。最后用 CAD 繪出相應的幾何圖形。關鍵詞：柴油機,曲柄連桿機構,動力學分析,CAD 制圖2L4100 Diesel Engine Design (Connecting Rod Mechanism)ABSTRACTThe main purpose of this design is to design the crank connecting rod mechanism of the L4100 diesel engine .including a variety of components . As the heart of the mechanical parts, 3this system plays a pivotal role.First from the overall aspects of the first to determine the form of the whole body to determine the overall size of the machine. And then focus on the details of the part. The design task is assigned step by step, from the structure of the cylinder head, the design of the valve drive group, to the design of the connecting rod of the piston connecting rod, the piston, and the crankshaft. Finally, the setting of the relevant transmission mechanism, Size and so on a series of complex design, and finally form a complete engine. If any of the middle of a process error, the completion of this task will be greatly reduced. So this design in the design of the crank link mechanism of all parts, are in the attitude of excellence to complete.As the engine has been given the relevant parameters, so the beginning of the design of the crank connecting rod mechanism in each of the components (including the piston, connecting rod, crankshaft) we have to use the first analysis of the corresponding movement, and then As the basis for the design of relevant parameters to ensure that the dynamic analysis can be reasonable and effective, and finally the relevant strength, hardness of the check. According to the final check the situation and then make the appropriate adjustments. In ensuring the maximum lightweight, flexible at the same time, to ensure that the relevant technical requirements. Finally, the use of three-dimensional software CAD to produce the corresponding geometric model.KEY WORDS: diesel engine,the crank connecting rod mechanism;dynamic analysis,three-dimensional software CAD目 錄4前言.....................................................................................................................1第一章 曲柄連桿機構受力分析 ......................................2§ 1.1 曲柄連桿機構運動學 .............................................................................2§ 1.1.1 活塞的位移 .................................................................................2§ 1.1.2 活塞的速度 .................................................................................4§ 1.1.3 活塞的加速度 .............................................................................4§ 1.2 曲柄連桿機構中的作用力 ....................................................................4§ 1.2.1 氣缸內(nèi)可燃混合氣的作用力 .....................................................5§ 1.2.2 機構的慣性力 .............................................................................5第二章 活塞組的設計 ..........................................................................................14§ 2.1 活塞的工作環(huán)境總括 .................................................................................14§ 2.1.1 活塞的工作條件和設計要求 ...................................................14§ 2.1.2 工作條件 .....................................................................................14§ 2.1.3 活塞頭部的設計 .........................................................................15§ 2.1.4 活塞裙部的設計 .......................................................................175§ 2.2 活塞環(huán)設計及計算 .....................................................................................19§ 2.2.1 活塞環(huán)形狀及主要尺寸設計 ...................................................19§ 2.2.2 活塞環(huán)強度校核 .......................................................................19§2.3 本章小結(jié) ...............................................................................................21第三章 連桿組的設計 ...................................................................................22§ 3.1 連桿的設計 ..........................................................................................22§ 3.1.1 連桿的工作情況、設計要求和材料選用 ...............................22§ 3.1.2 連桿長度的確定 .......................................................................23§ 3.1.3 連桿小頭的結(jié)構設計與強度、剛度計算 ...............................23§ 3.1.4 連桿桿身的結(jié)構設計與強度計算 ...........................................26§ 3.1.5 連桿大頭的結(jié)構設計與強度、剛度計算 ...............................29§ 3.2 連桿螺栓的設計 ..................................................................................31§ 3.2.1 連桿螺栓的工作負荷與預緊力 ...............................................31§ 3.2.2 連桿螺栓的屈服強度校核和疲勞計算 ...................................31§ 3.3 本章小結(jié) ..............................................................................................326第四章 曲軸的設計 ...............................................33§ 4.1 曲軸的結(jié)構型式和材料的選擇 .................................................................33§ 4.1.1 曲軸的結(jié)構型式 .......................................................................33§ 4.1.2 曲軸的材料 ................................................................................33§ 4.2 曲軸的主要尺寸的確定和結(jié)構細節(jié)設計 ..........................................34§ 4.2.1 曲柄銷的直徑和長度 ..............................................................34§ 4.2.2 主軸頸的直徑 和長度 .......................................................341D1L§ 4.2.3 曲柄 ...........................................................................................34§ 4.2.4 平衡重 .........................................................................................35§ 4.2.5 油孔的位置和尺寸 ...................................................................35§ 4.3 曲軸的疲勞強度校核 ...........................................................................36§ 4.3.1 作用于單元曲拐上的力和力矩 ...............................................36§ 4.3.2 名義應力的計算 .......................................................................41§ 4.4 本章小結(jié) ..............................................................................................43結(jié) 論 ......................................................................................................................447參考文獻...........................................................................................................43致 謝 ......................................................................................................................46