【摘要】：基于微凸體側(cè)接觸模型,推導(dǎo)了機(jī)械密封端面混合摩擦熱計(jì)算式,研究了轉(zhuǎn)速、摩擦間隙和粗糙度對(duì)常用機(jī)械密封端面混合摩擦熱的影響。結(jié)果表明:常用混合摩擦狀態(tài)下的機(jī)械密封端面微凸體接觸多為第II類彈塑性接觸;當(dāng)轉(zhuǎn)速ω?2 800r/min時(shí),微凸體接觸摩擦熱所占比重較大,但隨著轉(zhuǎn)速上升,黏性摩擦熱比重逐漸增大至百分之百;隨著摩擦間隙d的增大,黏性摩擦熱和微凸體接觸摩擦熱曲線均呈下降趨勢(shì),當(dāng)d?2.8σ時(shí),微凸體接觸摩擦熱減小至零,而黏性摩擦熱隨d變化不大;隨著粗糙度的增加,端面摩擦熱先下降后上升,在近1.6μm處最小,因而在機(jī)械密封設(shè)計(jì)時(shí),存在某一粗糙度使混合摩擦熱最少。
[Abstract]:Based on the lateral contact model of micro-convex body, the formula for calculating the friction heat of mechanical seal end face is derived, and the effects of rotating speed, friction clearance and roughness on the friction heat of mechanical seal end face are studied. The results show that the contact of the microconvex body on the end face of the mechanical seal under the condition of mixed friction is the II type elastoplastic contact. When the rotational speed is 蠅? 2 800r/min, the proportion of contact friction heat of microconvex body is larger, but with the increase of rotational speed, the specific gravity of viscous friction heat gradually increases to 100%. With the increase of the friction gap d, the friction heat curves of both the viscous friction heat and the microconvex body show a downward trend. When d is 2.8 蟽, the contact friction heat of the convex body decreases to zero, while the viscous friction heat does not change with d. With the increase of roughness, the friction heat of the end face decreases first and then rises to the minimum at about 1.6 渭 m. Therefore, in the design of mechanical seals, the existence of a certain roughness makes the mixing friction heat minimum.
【作者單位】： 南京林業(yè)大學(xué)機(jī)械電子工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(51375245,51505230) 江蘇省六大人才高峰(BZZ-037) 江蘇省高校優(yōu)勢(shì)學(xué)科建設(shè)工程 南京林業(yè)大學(xué)優(yōu)秀博士論文創(chuàng)新基金和揚(yáng)州市科學(xué)發(fā)展計(jì)劃(YZ2014092)資助項(xiàng)目
【分類號(hào)】：TH136

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