本文選題：液粘調(diào)速離合器 + 雙圓弧溝槽�。� 參考：《太原理工大學(xué)》2017年碩士論文

【摘要】：隨著現(xiàn)代化工業(yè)的快速發(fā)展,節(jié)能降耗成為工業(yè)企業(yè)的生存之本,液粘調(diào)速離合器以其摩擦損耗較小的特點,在許多工程生產(chǎn)領(lǐng)域得到應(yīng)用。為了使液粘調(diào)速離合器更好的滿足高速、重載、高精度等復(fù)雜工況,本文以液粘調(diào)速離合器為出發(fā)點,應(yīng)用FLUENT計算流體動力學(xué)軟件對其摩擦副一對摩擦片之間的薄膜流體進行數(shù)值計算,分析了影響雙圓弧結(jié)構(gòu)摩擦片間隙內(nèi)薄膜流體傳動性能的外部因素,對離合器接合時產(chǎn)生的空化現(xiàn)象展開了研究。分析了雙圓弧溝槽摩擦片結(jié)構(gòu)參數(shù)對油膜傳動性能的影響,在此基礎(chǔ)上對結(jié)構(gòu)參數(shù)進行優(yōu)化,使其有更好的油膜傳遞轉(zhuǎn)矩能力及優(yōu)良的散熱能力,為雙圓弧槽結(jié)構(gòu)摩擦片的設(shè)計提供理論依據(jù)。本論文的主要研究內(nèi)容如下:1)介紹了液粘調(diào)速離合器流體流場數(shù)值計算理論方法,主要包括:液粘傳動基礎(chǔ)理論、液粘傳動數(shù)學(xué)模型、湍流模型以及空化模型。根據(jù)其各自特點選擇出本文需要的模型,為本文數(shù)值計算提供理論鋪墊和參考依據(jù),選擇適用于重載場合的雙圓弧槽摩擦片結(jié)構(gòu)進行研究。2)對影響雙圓弧槽油膜傳動性能的外部因素進行分析,研究工作油粘度、進油溫度以及轉(zhuǎn)速對油膜傳遞轉(zhuǎn)矩的影響,著重分析了液粘調(diào)速離合器在接合過程中產(chǎn)生的空化現(xiàn)象及影響空化程度的因素,對比了空化前后各個參數(shù)對油膜轉(zhuǎn)矩傳遞的影響。結(jié)果表明:工作油粘度及主動摩擦片轉(zhuǎn)速對空化影響較大,粘度的增大、主動摩擦片轉(zhuǎn)速的增加,使得空化體積分?jǐn)?shù)明顯增加;轉(zhuǎn)速對空化區(qū)域的大小及產(chǎn)生位置有較大影響;工作油表面張力及進油壓力對空化幾乎沒有影響。工作油粘度和主動摩擦片轉(zhuǎn)速與油膜可傳遞轉(zhuǎn)矩呈正相關(guān),進油溫度與油膜可傳遞轉(zhuǎn)矩呈負(fù)相關(guān),工作油粘度取0.015Pa·s-0.025Pa·s,進油溫度取45℃-55℃時傳遞性能較好,轉(zhuǎn)速必須控制在合理的范圍內(nèi),不可過高。考慮空化現(xiàn)象相比于不考慮空化現(xiàn)象,油膜可傳遞轉(zhuǎn)矩都有著不同程度的減小。3)分析了不同摩擦片溝槽結(jié)構(gòu)的工作特點,突出研究雙圓弧溝槽摩擦片結(jié)構(gòu)薄膜流體。分析了雙圓弧溝槽結(jié)構(gòu)參數(shù)發(fā)生變化時油膜傳遞性能的變化,結(jié)構(gòu)參數(shù)主要包括油槽角度、油槽深度以及油槽數(shù)量。重點研究這些參數(shù)對油膜壓力、溫度及傳遞扭矩等傳遞性能的影響,并對比了油膜空化前后壓力及溫度的變化。最終通過控制變量法,綜合對比油槽初始角、深度及數(shù)目的最優(yōu)范圍并進行優(yōu)化,得出雙圓弧溝槽初始角度為47.5°,油槽深度為0.3mm,油槽數(shù)目為57時傳遞轉(zhuǎn)矩最大,且有著良好的散熱能力,為雙圓弧槽結(jié)構(gòu)摩擦片的設(shè)計提供理論依據(jù)。
[Abstract]:With the rapid development of modern industry, energy-saving and consumption reduction become the survival of industrial enterprises. The liquid-viscosity speed regulating clutch has been applied in many engineering fields because of its low friction loss. In order to make the fluid viscosity speed regulating clutch better meet the complex working conditions such as high speed, heavy load and high precision, this paper takes the liquid viscosity speed regulating clutch as the starting point. The thin film fluid between a pair of friction plates of the friction pair is numerically calculated with fluent computational fluid dynamics software. The external factors affecting the performance of the film fluid drive in the gap between the friction plates of the double circular arc structure are analyzed. The cavitation phenomenon of clutch joint is studied. The influence of structural parameters on the performance of oil film transmission is analyzed. On the basis of this, the structure parameters are optimized to have better oil film transfer torque and excellent heat dissipation ability. It provides a theoretical basis for the design of friction sheet with double arc groove structure. The main contents of this paper are as follows: (1) the numerical calculation method of fluid flow field of fluid viscosity speed regulating clutch is introduced, including: basic theory of fluid viscosity transmission, mathematical model of fluid viscosity transmission, turbulence model and cavitation model. According to their respective characteristics, the model needed in this paper is selected, which provides the theoretical foundation and reference basis for the numerical calculation of this paper. Select the structure of double circular arc groove friction plate suitable for heavy load. 2) analyze the external factors that affect the performance of double circular arc groove oil film transmission, and study the effects of working oil viscosity, oil inlet temperature and rotational speed on the oil film transfer torque. The cavitation phenomenon and the factors affecting the cavitation degree of the liquid-viscosity speed regulating clutch during the process of engagement are analyzed emphatically. The effects of the parameters before and after cavitation on the torque transfer of the oil film are compared. The results show that the viscosity of the working oil and the rotational speed of the active friction plate have great influence on the cavitation, the increase of the viscosity and the increase of the rotational speed of the active friction plate make the cavitation volume fraction increase obviously, and the rotational speed has a great influence on the size and the position of the cavitation region. The surface tension and inlet pressure of working oil have little effect on cavitation. The viscosity of the working oil and the rotational speed of the active friction plate are positively correlated with the oil film transferable torque, and the oil inlet temperature is negatively correlated with the oil film transferable torque. When the working oil viscosity is 0.015 Pa s-0.025 Pa / s and the oil inlet temperature is 45 鈩，

本文編號：2106849