液力緩速器換熱器設計與分析

2.13萬字
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摘 要
近年來，隨著我國道路交通事業(yè)發(fā)展，道路交通狀況和車輛通行能力有了極大的改善，公路貨運車輛的裝載量和公路客車的需求量都越來越大，其行駛里程越來越長，各類車輛的性能也在不斷提升，平均車速也越來越高。盡笯@盜舅∮玫姆⒍β試諤岣擼盜拘諧抵貧韉鬧貧茉謔瀾綬段諢姑揮薪洗笸黃?，由又o蕓占涑嘰緄南拗?，茷c⑷饒芰τ邢薜仍潁諂搗敝貧蛘叱中貧奶跫祿岢魷指呶祿郟紗瞬思菔輝薄⒊嗽薄⑿腥恕⒊盜競突蹺锏陌踩侍狻�
因此，為保證此類車輛具有良好的制動性能，除行車制動器外，還應裝備輔助制動器，將車輪制動器的負荷進行分流，使車輪制動器溫度控制在安全范圍內。減速制動器作為車輛的輔助制動系統(tǒng)部件，它通過作用于傳動系統(tǒng)而減輕原車制動系統(tǒng)的負荷，使車輛均勻減速，以提高車輛制動系統(tǒng)的可靠性，延長制動系統(tǒng)的使用壽命，并能由此而大幅度降低車輛使用成本。其中液力減速制動器使用壽命長，制動功率大，控制品質好，適宜連續(xù)制動，具有廣泛的應用前景。在國外，對車輛用液力緩速器己有相當深入的研究和廣泛應用，但是在國內還處于理論研究，樣機開發(fā)階段。
本文的研究目的就是在廣泛收集國內外相關資料的條件下，主要以某型號的液力緩速器進行研究，并使用 MATLAB 軟件對裝有液力緩速器的熱交換器進行性能仿真分析。主要包括以下幾方面的內容：
（1）分析各種輔助制動裝置的優(yōu)缺點，并對液力緩速器工作原理和特點， 進行了詳細分析；詳細考察了國內外液力緩速器研究、應用現(xiàn)狀、法規(guī)情況的基礎上，綜述了板翅式換熱器的應用狀況、換熱器傳熱模型研究現(xiàn)狀和發(fā)展趨勢，確定了課題目標及研究方向。
（2）本文以板翅式換熱器傳熱理論為基礎，建立了熱交換系統(tǒng)的數(shù)學模型，并用 MATLAB 軟件中的 SIMULINK 進行了仿真分析。

關鍵詞：液力緩速器、板翅式換熱器、輔助制動、熱交換、仿真分析

Abstract
In recent years, along with our country road traffic development, road traffic conditions and vehicle traffic capacity has greatly improved, and the loading capacity of highway freight vehicle and highway passenger demand is bigger and bigger, its range is more and more long, all kinds of performance of the vehicle are also rising, average speed is becoming more and more high.Although engine power in improving vehicle chooses, but driving vehicle brakes brake efficiency around the world have not bigger breakthrough, due to the restrictions on the size of the space, its cooling ability is limited, the frequent braking or continuous braking will appear under the conditions of high temperature accumulation, creating drivers, crew, passengers, vehicles and goods safety.
Therefore, to ensure that the vehicle has good braking performance, in addition to the vehicle brake, should also be equipped with auxiliary brake, the load of the wheel brake, make the wheel brake temperature control within the scope of the security.Deceleration brake as an auxiliary braking system of the vehicle parts, it is by acting on transmission system and reduce the original car brake system load, uniform vehicle deceleration and to improve the reliability of vehicle braking system, extend the service life of brake system, and can therefore reduce the cost of vehicle use.With long service life of hydraulic brake deceleration and braking power is big, good control quality, suitable for continuous braking, has wide application prospect.Abroad, for vehicle use own in-depth study of hydraulic retarder and widely used, but in China is still in the theoretical research, prototype development.
The research purpose of this article is under the condition of extensive collection of related data at home and abroad, mainly to study a type of hydraulic retarder, and the use of MATLAB software for the heat exchanger is equipped with hydraulic retarder performance simulation analysis.Content mainly includes the following several aspects:
(1) Analysis of the advantages and disadvantages of all kinds of auxiliary braking device, and the working principle and characteristics of the hydraulic retarder are analyzed in detail.Was investigated in detail at home and abroad research, the hydraulic retarder, laws and regulations, on the basis of the status quo of the application are reviewed in this paper, the application of plate-fin heat exchanger heat exchanger heat transfer model research status and development trend, the topic goal and the research direction is determined.
(2) In this paper, on the basis of plate-fin heat exchanger heat transfer theory, establishes the mathematical model of heat exchange system, using SIMULINK in MATLAB software simulation analysis.
Key words: Hydraulic retarder, Auxiliary brake, Simulation, heat exchanger


目 錄
摘要 1
Abstract 2
第一章 緒論 6
1.1.汽車緩速器的類型和分類 7
1.1.1.發(fā)動機排氣緩速 7
1.1.2.電渦流緩速 8
1.1.3.液力緩速 9
1.2.液力緩速器的類型 10
1.3.液力緩速器國內外發(fā)展概況 11
1.3.1.國外緩速器概況 11
1.3.2.國內緩速器發(fā)展概況 11
1.4.課題研究意義及本文的主要研究內容 12
1.4.1.課題研究意義 12
1.4.2. 本文主要研究內容 13
1.5..