發(fā)布時(shí)間：2018-10-17 18:48

【摘要】：在現(xiàn)代戰(zhàn)爭(zhēng)中，武裝直升機(jī)執(zhí)行著對(duì)地攻擊、火力支援、空中格斗、偵察、護(hù)航等重要軍事任務(wù)，其所發(fā)揮的巨大威力和不可替代的作用已為世人所公認(rèn)。然而，在防空力量日趨加強(qiáng)的今天，武裝直升機(jī)在執(zhí)行戰(zhàn)斗任務(wù)的同時(shí)，又將面臨一個(gè)從天上到地面多方位、多種類的被探測(cè)與被攻擊的戰(zhàn)場(chǎng)環(huán)境，從而使其戰(zhàn)場(chǎng)生存能力受到嚴(yán)重威脅。當(dāng)武裝直升機(jī)傳動(dòng)系統(tǒng)在作戰(zhàn)中中彈漏油后，將出現(xiàn)失去潤(rùn)滑的極端工況。在這種情況下，傳動(dòng)系統(tǒng)的工作時(shí)間決定著直升機(jī)的戰(zhàn)場(chǎng)生存能力和機(jī)組人員的生命安全。因此，基于武裝直升機(jī)傳動(dòng)系統(tǒng)生存能力的要求，開展失去潤(rùn)滑條件下直升機(jī)傳動(dòng)系統(tǒng)溫度場(chǎng)分析研究是非常必要的，它是研究改善傳動(dòng)系統(tǒng)傳動(dòng)性能和提高抗失效能力的重要途徑，其可能的研究成果有助于我國(guó)武裝直升機(jī)戰(zhàn)場(chǎng)生存能力設(shè)計(jì)研究，并可推廣到車輛、船舶、飛機(jī)等其它民用和軍用機(jī)械裝備領(lǐng)域，具有巨大的應(yīng)用和經(jīng)濟(jì)價(jià)值。 本文以某型直升機(jī)尾減速器弧齒錐齒輪傳動(dòng)系統(tǒng)為研究對(duì)象，基于齒輪嚙合原理、摩擦學(xué)、傳熱學(xué)和熱網(wǎng)絡(luò)法等理論，對(duì)弧齒錐齒輪傳動(dòng)系統(tǒng)的發(fā)熱機(jī)理、傳熱過程及溫度場(chǎng)分布進(jìn)行了分析研究，主要研究?jī)?nèi)容和成果如下： 1、對(duì)熱網(wǎng)絡(luò)節(jié)點(diǎn)進(jìn)行分類說(shuō)明，并設(shè)立節(jié)點(diǎn)劃分原則。以某型直升機(jī)尾減速器弧齒錐齒輪傳動(dòng)系統(tǒng)為研究對(duì)象，根據(jù)其各零部件間的傳熱換熱關(guān)系，對(duì)其進(jìn)行節(jié)點(diǎn)布置，構(gòu)建熱網(wǎng)絡(luò)模型，并建立其節(jié)點(diǎn)溫度平衡方程組。 2、將弧齒錐齒輪等效為當(dāng)量直齒圓柱齒輪，并綜合考慮齒輪傳動(dòng)過程中嚙合點(diǎn)相對(duì)滑動(dòng)速度、法向載荷、摩擦系數(shù)等時(shí)變性因素和實(shí)際重合度的影響，建立弧齒錐齒輪摩擦功率損失計(jì)算模型。另外，考慮熱空氣物性參數(shù)隨溫度變化的影響，建立不同潤(rùn)滑狀態(tài)下的滾動(dòng)軸承摩擦功率損失計(jì)算模型。 3、建立正常潤(rùn)滑及失去潤(rùn)滑條件下的弧齒錐齒輪傳動(dòng)系統(tǒng)熱阻和對(duì)流換熱系數(shù)計(jì)算模型。其中，失去潤(rùn)滑條件下與熱空氣之間的對(duì)流換熱系數(shù)計(jì)算模型因考慮了熱空氣物性參數(shù)隨溫度變化的影響而具有時(shí)變特性。 4、以某型直升機(jī)尾減速器弧齒錐齒輪傳動(dòng)系統(tǒng)為研究對(duì)象，建立其正常潤(rùn)滑條件下的溫度場(chǎng)Simulink仿真計(jì)算模型�；谠撃Ｐ�，計(jì)算獲得該齒輪傳動(dòng)系統(tǒng)在正常潤(rùn)滑條件下的溫度場(chǎng)隨時(shí)間的變化曲線，并提取出其穩(wěn)態(tài)溫度場(chǎng)分布作為失去潤(rùn)滑條件下瞬態(tài)溫度場(chǎng)預(yù)測(cè)的初始條件。 5、以某型直升機(jī)尾減速器弧齒錐齒輪傳動(dòng)系統(tǒng)為研究對(duì)象，建立其失去潤(rùn)滑條件下的溫度場(chǎng)Simulink仿真計(jì)算模型�；谠撃Ｐ�，以正常潤(rùn)滑條件下穩(wěn)態(tài)溫度場(chǎng)為初始條件，計(jì)算了其在失去潤(rùn)滑條件下瞬態(tài)溫度場(chǎng)，分析了各節(jié)點(diǎn)溫度隨時(shí)間的變化規(guī)律。 6、首次將Simulink軟件用于仿真求解弧齒錐齒輪傳動(dòng)系統(tǒng)溫度場(chǎng)。該方法不僅可以計(jì)算獲得溫度場(chǎng)的平衡值（穩(wěn)態(tài)溫度場(chǎng)），，還可以預(yù)測(cè)溫度場(chǎng)的時(shí)變過程（瞬態(tài)溫度場(chǎng)），為進(jìn)行齒輪傳動(dòng)系統(tǒng)溫度場(chǎng)分析研究提供了一種新思路。
[Abstract]:In the armed conflict, armed helicopters carry out important military tasks such as ground attack, fire support, air combat, reconnaissance, escort and other important military tasks, and the great power and irreplaceable role played by them has been recognized by the world. However, with the increasing strength of air defense, the armed helicopter will face a multi-faceted and multi-species detection and attack battlefield environment from the sky to the ground while carrying out the combat mission, so that the survivability of the battlefield is seriously threatened. The extreme operating conditions of loss of lubrication will occur when the helicopter transmission system has been shot in combat. In this case, the working time of the transmission system determines the battlefield survivability of the helicopter and the life safety of the crew. Therefore, based on the requirement of survivability of helicopter transmission system, it is necessary to study the temperature field analysis of helicopter transmission system under the condition of loss of lubrication. It is an important way to study the transmission performance of transmission system and improve the anti-failure ability. The possible research results will contribute to the design and study of the battlefield survivability of armed helicopters in China, and can be extended to other fields of civil and military machinery equipment such as vehicles, ships, aircraft and so on, with great application and economic value. Based on the theory of gear meshing principle, tribology, thermography and thermal network method, the heating mechanism, heat transfer process and temperature field distribution of arc gear drive system are analyzed based on the theory of gear meshing principle, tribology, continuum theory and thermal network method. Research, main research content and results 1. Classify the hot network node and set up the section Based on the relationship between the heat transfer and heat transfer among the parts, a thermal network model is constructed and its node temperature is established. According to the balance equation, the arc tooth bevel gear is equivalent to the equivalent straight tooth cylindrical gear, and the influence of the meshing point relative sliding speed, the method to the load, the coefficient of friction and the like in the gear transmission process is comprehensively considered, and the friction of the arc tooth bevel gear is established. In addition, in consideration of the influence of the physical parameters of hot air over temperature, rolling bearing friction under different lubrication conditions is established. Calculation model of power loss. 3. Establish the thermal resistance of arc tooth bevel gear transmission system under normal lubrication and loss of lubrication condition. and a convection heat exchange coefficient calculation model, wherein the calculation model of the convection heat exchange coefficient between the hot air and the hot air under the condition of loss of lubrication changes the physical parameters of the hot air with the temperature In this paper, the temperature field under normal lubrication condition is established by using the bevel gear transmission system of the tail reducer of a helicopter as the research object. Based on the model, the change curve of the temperature field over time under normal lubrication condition is calculated and the steady-state temperature field distribution of the gear transmission system is extracted as the loss lubrication strip. The initial conditions of the transient temperature field prediction under the condition are as follows: 5. The transmission system of the bevel gear of the tail reducer of a type of helicopter is used as the research object, and the condition of loss of lubrication is established. Based on the model, the transient temperature field under the condition of loss of lubrication is calculated based on the model and the steady-state temperature field is the initial condition under normal lubrication condition. The change rule of temperature over time of each node is analyzed. The method not only can calculate the equilibrium value (steady-state temperature field) of temperature field, but also can predict the time-varying process of temperature field (transient temperature field).
【學(xué)位授予單位】：國(guó)防科學(xué)技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：V275.1;TH132.41

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