本文關(guān)鍵詞：變轉(zhuǎn)速條件下油槽結(jié)構(gòu)對(duì)液粘傳動(dòng)特性的影響研究　出處：《江蘇大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 液粘傳動(dòng) 液粘離合器 非結(jié)構(gòu)化網(wǎng)格 變轉(zhuǎn)速 油槽結(jié)構(gòu) 傳動(dòng)特性

【摘要】：液粘傳動(dòng)是采用摩擦片間油膜傳遞動(dòng)力,通過(guò)改變油膜厚度來(lái)實(shí)現(xiàn)無(wú)級(jí)調(diào)速的一種新興的流體傳動(dòng)方式,在節(jié)能調(diào)速領(lǐng)域具有重要的應(yīng)用價(jià)值。目前,國(guó)內(nèi)外學(xué)者對(duì)液粘傳動(dòng)的機(jī)理進(jìn)行了大量的研究,但尚未研究定轉(zhuǎn)差下被動(dòng)片轉(zhuǎn)速和油槽結(jié)構(gòu)對(duì)液粘傳動(dòng)特性的影響。針對(duì)以上問(wèn)題,本文開(kāi)展了以下研究:建立液粘傳動(dòng)的基本數(shù)學(xué)模型和摩擦片間油膜數(shù)值計(jì)算模型,在考慮結(jié)構(gòu)化網(wǎng)格和非結(jié)構(gòu)化網(wǎng)格差異的基礎(chǔ)上,進(jìn)行了數(shù)值計(jì)算模型的網(wǎng)格無(wú)關(guān)性驗(yàn)證,最終得到最適合本文數(shù)值計(jì)算的網(wǎng)格劃分方案。采用理論推導(dǎo)和數(shù)值計(jì)算相結(jié)合的方法,研究了定轉(zhuǎn)差下被動(dòng)片轉(zhuǎn)速對(duì)液粘傳動(dòng)特性的影響,研究結(jié)果表明:隨著被動(dòng)片轉(zhuǎn)速增大,摩擦片間流體壓力分布愈加復(fù)雜,轉(zhuǎn)折值減小,非油槽區(qū)流體徑向速度降低,非油槽區(qū)油膜覆蓋率下降,傳遞轉(zhuǎn)矩降低,而流體溫升大幅增大。結(jié)合數(shù)值計(jì)算結(jié)果,研究了油槽結(jié)構(gòu)對(duì)油膜傳遞動(dòng)力的影響規(guī)律,提出了一種可以提高油膜傳遞扭矩的方案,即沿著半徑增大方向,逐漸減小油槽的寬度和深度。并在定轉(zhuǎn)差變轉(zhuǎn)速條件下,以外徑處的油槽角度和油槽深度為變量,研究了油槽寬度和油槽深度在半徑方向變化對(duì)液粘傳動(dòng)特性的影響。研究結(jié)果表明:外徑處油槽寬度減小,則傳遞轉(zhuǎn)矩增大,而溫升未增大,外徑處油槽角度2?=0.5?時(shí)的傳遞轉(zhuǎn)矩約為2?=4.5?時(shí)傳遞轉(zhuǎn)矩的200%;外徑處油槽深度減小,則傳遞轉(zhuǎn)矩增大,而溫升未增大,當(dāng)外徑處油槽深度減小到2h=0.05mm時(shí),傳遞轉(zhuǎn)矩約為2h=0.2mm時(shí)傳遞轉(zhuǎn)矩的150%。根據(jù)實(shí)驗(yàn)方案搭建了液粘離合器實(shí)驗(yàn)臺(tái),實(shí)驗(yàn)結(jié)果表明:定轉(zhuǎn)差條件下,液粘離合器傳遞轉(zhuǎn)矩隨被動(dòng)片轉(zhuǎn)速增大而減小;在定轉(zhuǎn)差變轉(zhuǎn)速條件下,外徑處油槽深度減小,傳遞轉(zhuǎn)矩增大,而流體溫升無(wú)明顯變化。
[Abstract]:Hydro viscous transmission is a new fluid transmission mode which realizes the stepless speed regulation by changing the oil film thickness through the transmission of oil film between the friction discs. It has important application value in the field of energy saving and speed regulation. At present, scholars at home and abroad have done a lot of research on the mechanism of liquid viscous transmission, but the influence of rotational speed and oil groove structure on the transmission characteristics of liquid viscous has not been studied yet. To solve the above problems, this paper carried out the following research: computing model of liquid viscous transmission of the basic mathematical model and friction between oil film numerical based on structured and unstructured grids on the difference, the grid numerical model to verify, finally obtain the meshing scheme is most suitable for the numerical calculation. Using the method of theoretical derivation and numerical calculation combined with the effect of passive film speed slip on the transmission characteristics of liquid viscosity, the results show that with the passive film speed increases, friction between the fluid pressure distribution is more complex, turning value decreases, the non oil groove radial velocity is reduced, the non oil tank area the oil film coverage rate decreased, the transmission torque is reduced, while the fluid temperature rise greatly. Combined with the numerical results, the influence of the oil groove structure on the transmission power of the oil film is studied. A scheme that can increase the transmission torque of the oil film is put forward, that is, the width and depth of the oil groove gradually decrease along the radius increasing direction. Under the condition of fixed rotation and differential speed, the influence of oil groove width and depth of oil groove on the fluid viscous transmission characteristics is studied based on the angle of oil groove and the depth of oil groove at outer diameter. The results show that: the diameter of oil groove width decreases, while the transmission torque is increased, and the temperature rise is not increased, the outer diameter of oil groove angle of 2? =0.5? The transfer torque is about 2? =4.5? When the transfer torque of 200%; the outside diameter of oil groove depth decreases, while the transmission torque increases, while the temperature did not increase when the outside diameter, reducing oil groove depth to 2h=0.05mm, the transmission torque is about 150% 2h=0.2mm when the torque transmission. According to the experimental scheme to build viscous clutch test rig, the experimental results show that under the condition of constant slip, viscous clutch torque decreases with the increasing speed of passive film; variable speed in speed, diameter of oil groove depth is reduced, the transmission torque is increased, and the flow temperature had no obvious change.
【學(xué)位授予單位】：江蘇大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TH137

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