節(jié)能型汽車轉(zhuǎn)向油泵的設(shè)計和研究

論文編號:JX1514  論文字?jǐn)?shù):27021.頁數(shù):67

節(jié)能型汽車轉(zhuǎn)向油泵的設(shè)計和研究
摘  要     

 助力轉(zhuǎn)向泵性能的好壞直接關(guān)系到汽車轉(zhuǎn)向系統(tǒng)是否能正常運(yùn)行。目前使用廣泛的雙作用葉片泵存在著較大的能量浪費(fèi)；而單作用葉片泵卻由于輸出流量可隨負(fù)載變化，可以減少其能量損耗。本文提出單作用葉片泵替代雙作用葉片泵的設(shè)計思路。與雙作用葉片泵相比，單作用葉片泵具有良好的預(yù)升、卸能力和節(jié)約能量等優(yōu)點，而且滿足變工況調(diào)節(jié)。針對單作用葉片泵流量脈動較大、定子受力不好的情況，文中對其流量特性和定子力學(xué)特性進(jìn)行研究分析，得出的結(jié)論是:葉片數(shù)的奇偶性與葉片泵的流量脈動沒有直接的關(guān)系；定子在x軸向的所受作用力較小，而且方向恒定。對常見的機(jī)械中位開式、機(jī)械中位閉式、電動中位開式和電動中位閉式幾種液壓助力轉(zhuǎn)向系統(tǒng)的節(jié)能策略進(jìn)行分析，并進(jìn)行節(jié)能效果的比較。通過分析和比較，發(fā)現(xiàn)電動中位閉式液壓助力轉(zhuǎn)向系統(tǒng)具有明顯節(jié)能的優(yōu)勢。在電機(jī)方面采用了新型節(jié)能的變頻液壓技術(shù)，研究和分析了一種新型變頻閉式液壓動力系統(tǒng)，主要由變頻電機(jī)驅(qū)動的主油路和補(bǔ)油回路組成。此外，本文運(yùn)用軟件Pro/E對轉(zhuǎn)向泵進(jìn)行三維數(shù)字化建模以避免將來在加工裝配過程中人力、物力、財力等不必要的浪費(fèi)和損失。
 總之，本文對解決車輛能耗問題具有較高的現(xiàn)實意義，同時對復(fù)雜液壓元件的虛擬設(shè)計有著重要的參考價值。
 
關(guān)鍵詞:電動液壓助力轉(zhuǎn)向泵 中位開式 中位閉式 變頻電機(jī) 三維建模

DESIGN AND RESEARCH IN THOERY ABOUT
STEERING PUMPS OF POWER-SAVING TYPE

ABSTRACT

 The quality of power assisted steering pump influences the automobile steering systematic normal running directly. The double action vane pump using extensively at present has great energy waste; however the single action vane pump, owing to output flow varying with load, can reduce energy waste. So text adopted single action vane pump to replace double action this vane pump, optimized port plate design and emulated its distributing flow characteristic. The result indicated that this steering pump nicer boosting and unloading pressure ability in advance . This text studied the pump's flow characteristic and mechanics characteristic of its stator and drawed the conclusion that vane number is odd or even number has no relation with flow pulses when vane number is even number, force the stator suffering along the X anxis is less than when vane number is neighboring odd number and its direction is constant. These Center-open EHPS system, Center-closed EHPS system Though analyzing and comparing, it can be proved that the EHPS system will be dominant and developed mainly in the future. The variable speed control hydraulic technology is a new kind of energy saving transmission technique. In this paper, a new variable speed control hydraulic power unit is developed. In addition, this text used the software PRO/E to build the three-dimensional model of the steering pump, thereby avoiding the waste and loss of manpower, material resources, financial resources in the course of processing and assembling in the future.
 In a word, this text has certain actual meanings in solving the vehicle energy consumption problem. At the same time, there is important reference value to the fictitious design of the complicated hydraulic pressure component.
 
KEY WORDS：Electro-Hydraulic Power Steering(EHPS) of the pump, Center-open, Center-closed, Frequency conversion motor, Three-dimensional modeling

目  錄

 摘  要 Ⅰ
ABSTRACT Ⅱ
1  緒論 1
 1.1汽車轉(zhuǎn)向系統(tǒng)簡介： 1
 1.2國內(nèi)外研究動態(tài) 2
 1.3開展本論文研究的工程意義 4
 1.4本論文的創(chuàng)新點 5
 1.5論文研究的主要內(nèi)容 5
2  研究電控液壓助力轉(zhuǎn)向系統(tǒng)(EHPS)的特點和工作原理 7
 2.1 EHPS系統(tǒng)構(gòu)成及工作原理 7
 2.2 EHPS系統(tǒng)分類和特點 8
 2.3 EHPS系統(tǒng)與其它轉(zhuǎn)向系統(tǒng)的比較 9
 3  轉(zhuǎn)向泵的流量和壓力特性的分析和設(shè)計 11
 3.1轉(zhuǎn)向泵的流量特性分析 11
 3.2理想狀態(tài)下節(jié)能型轉(zhuǎn)向泵的瞬時流量特性分析 11
 3.3卸荷槽引起的回沖流量特性 13
 3.4考慮實際影響因素時節(jié)能型轉(zhuǎn)向泵的瞬時流量 14
 3.5節(jié)能型轉(zhuǎn)向泵定子的力學(xué)特性分析 16
 3.5.1定子受力的數(shù)學(xué)模型 16
 3.5.2定子受力計算結(jié)果分析 21
 3.5.3變量機(jī)構(gòu)參數(shù)的確定 21
 3.5.4節(jié)能型轉(zhuǎn)向泵的流量-轉(zhuǎn)速特性 24
 4  對現(xiàn)有中位開式、閉式液壓助力轉(zhuǎn)向系統(tǒng)進(jìn)行能耗分析 26
 4.1現(xiàn)有傳統(tǒng)液壓助力轉(zhuǎn)向系統(tǒng)的能耗分析 26
 4.2幾種轉(zhuǎn)向助力系統(tǒng)節(jié)能方案的原理介紹和能耗分析 27
 4.2.1變量泵中位開式轉(zhuǎn)向助力系統(tǒng) 27
 4.2.2電動中位開式轉(zhuǎn)向助力系統(tǒng) 28
 4.2.3中位閉式轉(zhuǎn)向助力系統(tǒng) 28
 4.3汽車轉(zhuǎn)向助力系統(tǒng)節(jié)能方案的確定 28
 5  研究變頻閉式液壓電動機(jī)動力系統(tǒng) 30
 5.1變頻液壓技術(shù)的優(yōu)點 30
 5.2變頻調(diào)速技術(shù)的基本原理及特點 30
 5.3變頻調(diào)速裝置及其控制方式 31
 5.3.1變頻調(diào)速裝置的組成 31
 5.3.2異步電機(jī)變頻調(diào)速的控制方式 32
 5.4變頻液壓動力系統(tǒng)中電機(jī)的選型比較 33
 5.5變頻液壓動力系統(tǒng)中泵的類型比較 37
 5.6變頻閉式液壓動力系統(tǒng)的方案設(shè)計 39
 5.6.1變頻液壓動力系統(tǒng)的控制方案組成 39
 5.6.2變頻閉式液壓動力系統(tǒng)的元件選型設(shè)計 39
 5.6.3系統(tǒng)整體結(jié)構(gòu)設(shè)計 41
 6  轉(zhuǎn)向泵的三維實體造型 42
 6.1三維實體造型 42
 6.1.1轉(zhuǎn)子的三維建模 44
 6.1.2泵蓋的三維建模 44
 6.1.3左配流盤的三維建模 46
 6.1.4泵體的三維建模 46
 6.2虛擬裝配 48
 6.2.1轉(zhuǎn)向泵的組裝 48
 6.2.1轉(zhuǎn)向泵的爆炸圖 49
參考文獻(xiàn) 50
總結(jié)與展望 52
附    錄 53
謝    辭 62