脈動(dòng)式無級(jí)變速裝置的仿真及設(shè)計(jì)

論文編號(hào):JX1516  論文字?jǐn)?shù):26751.頁數(shù):72

脈動(dòng)式無級(jí)變速裝置的仿真及設(shè)計(jì)
摘  要
 無級(jí)變速器（Continuously Variable Transmission，簡稱CVT）是一種能夠使機(jī)器的輸出軸轉(zhuǎn)速在兩個(gè)極值范圍內(nèi)連續(xù)變化的傳動(dòng)部件。一般地，按照傳動(dòng)介質(zhì)的不同，無級(jí)變速器可以分為機(jī)械式、液壓式、電力式。其中，機(jī)械式無級(jí)變速器由于結(jié)構(gòu)簡單，維護(hù)方便，價(jià)格低廉，傳動(dòng)效率較高，實(shí)用性強(qiáng)，傳動(dòng)平穩(wěn)性好，工作可靠，特別是某些機(jī)械無級(jí)變速器在很大范圍內(nèi)具有恒功率的機(jī)械特性（這是電器和液壓無級(jí)調(diào)速裝置所難達(dá)到的）等優(yōu)點(diǎn)在國內(nèi)外應(yīng)用日益廣泛。它主要有摩擦式、鏈?zhǔn)�、帶式和脈動(dòng)式等幾大類型。
 脈動(dòng)式無級(jí)變速器具有傳動(dòng)可靠、變速范圍大、靜止或運(yùn)動(dòng)均可調(diào)速、結(jié)構(gòu)緊湊、重量較輕等優(yōu)點(diǎn)，廣泛地應(yīng)用于各類傳動(dòng)系統(tǒng)中。其工作原理主要是采用連桿(或凸輪)機(jī)構(gòu)作為脈沖發(fā)生器，如采用曲柄搖桿機(jī)構(gòu)，將輸入軸曲柄的勻速轉(zhuǎn)動(dòng)轉(zhuǎn)變?yōu)閾u桿的往復(fù)擺動(dòng)，再通過單向超越離合器將搖桿的往復(fù)擺動(dòng)轉(zhuǎn)換為單向脈動(dòng)旋轉(zhuǎn)運(yùn)動(dòng)輸出；而無級(jí)調(diào)速的實(shí)現(xiàn)主要通過調(diào)速機(jī)構(gòu)改變連桿機(jī)構(gòu)中各桿件之間的尺寸比例關(guān)系，使搖桿的擺角和其平均擺動(dòng)速度實(shí)現(xiàn)連續(xù)改變。
 課題的主要工作內(nèi)容是：
 1.基于Matlab軟件環(huán)境下脈動(dòng)式無級(jí)變速器的運(yùn)動(dòng)學(xué)仿真；
 2.基于Pro/E軟件環(huán)境下脈動(dòng)式無級(jí)變速器的結(jié)構(gòu)設(shè)計(jì)。
 
關(guān)鍵詞：無級(jí)變速器  脈動(dòng)式無級(jí)變速器  運(yùn)動(dòng)學(xué)仿真  結(jié)構(gòu)設(shè)計(jì)  Matlab  Pro/E

Simulation and Design of Impulse Stepless Speed Variation
ABSTRACT
 Continuously variable transmission (Abbr. CVT),is a transmissiongearing, which can make the rotational speed of output axle changecontinuously between max and min. generally speaking, according totransmission medium, CVT is classified as mechanical type, hydraulictype, and electric type. For many strong points, Mechanical CVT hasmore and more developed gradually domestically and abroad. Theadvantages include simple structure, easy repairing, low price, andefficient transmission, and general application, good steady andsatisfactory function. Especially some Mechanical CVT hasunchangeable power in wide range, which doesn’t reach by electricand hydraulic CVT. It is mainly composed of friction type, chain type,belt type, impulse type.
 Impulse Stepless Speed Variation has been widely applied to all kinds of transmission system,because it has many advantages,such as reliable transmission,broad adjustable-speed rang, timing at rest or movement, compact structure and lighter weight, and so on.Its principle chiefly uses connecting rod(or cam) as the impulse generator such as crank-link type. Crank-link type can make uniform motion of input axle change into reciprocating swing of waving-link, and then by single super-clutch, the reciprocating swing of waving-link transmits single impulse rotating motion. We accomplish continuously variable transmission, by using structure of change speed. The structure can change dimension proportion between links and accomplish continuous change of swinging angle and average swinging speed.
 Project work are:
 1. Matlab software environment based on pulse-type CVT kinematics simulation;
 2. Based on Pro / E software environment, the structure of impulse variable speed device design.
 
 Key words：Continuously Variable Transmission  Impulse Steeples Speed Variation  kinematics simulation  structural design  Matlab  Pro/E

目  錄
 摘要……………………………………………………………………………Ⅰ
 ABSTRACT……………………………………………………………………Ⅱ
 1 概述…………………………………………………………………………1
 1.1 無級(jí)變速器……………………………………………………………1
 1.1.1 無級(jí)變速器簡介………………………………………………1
 1.1.2 無級(jí)變速器的分類及應(yīng)用……………………………………1
 1.2 脈動(dòng)式無級(jí)變速器的發(fā)展概況………………………………………4
 1.3 課題工作的內(nèi)容………………………………………………………6
 2 脈動(dòng)式無級(jí)變速器工作原理……………………………………………7
 2.1 工作原理………………………………………………………………7
 2.2 結(jié)構(gòu)特點(diǎn)………………………………………………………………7
 3 基于Matlab軟件環(huán)境下的脈動(dòng)式無級(jí)變速器運(yùn)動(dòng)學(xué)仿真…………9
 3.1 Matlab簡介…………………………………………………………9
 3.2 數(shù)學(xué)模型的建立………………………………………………………9
 3.3 運(yùn)動(dòng)學(xué)仿真…………………………………………………………11
 3.3.1 計(jì)算初始值……………………………………………………11
 3.3.2 運(yùn)動(dòng)學(xué)仿真……………………………………………………13
 4 基于Pro/E軟件環(huán)境下的脈動(dòng)式無級(jí)變速器結(jié)構(gòu)設(shè)計(jì)……………16
 4.1 Pro/E簡介……………………………………………………………16
 4.2 傳動(dòng)機(jī)構(gòu)設(shè)計(jì)………………………………………………………17
 4.2.1 軸的設(shè)計(jì)………………………………………………………17
 4.2.2 連桿的設(shè)計(jì)……………………………………………………18
 4.2.3 其它零部件的設(shè)計(jì)……………………………………………21
 4.3 調(diào)速機(jī)構(gòu)設(shè)計(jì)………………………………………………………22
 4.3.1 軸的設(shè)計(jì)………………………………………………………22
 4.3.2 蝸輪蝸桿的設(shè)計(jì)………………………………………………23
 4.3.3 其它零部件的設(shè)計(jì)……………………………………………24
 4.4 輸出機(jī)構(gòu)設(shè)計(jì)………………………………………………………25
 4.4.1 軸的設(shè)計(jì)………………………………………………………25
 4.4.2 超越離合器的選擇……………………………………………26
 4.4.3 其它零部件的設(shè)計(jì)……………………………………………27
 4.5 箱體的設(shè)計(jì)…………………………………………………………29
 5 脈動(dòng)式無級(jí)變速器的裝配及動(dòng)態(tài)仿真…………………………………31
 5.1 虛擬裝配過程………………………………………………………31
 5.2 動(dòng)態(tài)仿真……………………………………………………………35
 6 總結(jié)及展望………………………………………………………………38
 參考文獻(xiàn)……………………………………………………………………39
 附錄…………………………………………………………………………40
 謝辭…………………………………………………………………………42
 外文翻譯…………………………………………………………………43