对混有炭黑、小料和混炼胶的废密炼机转子密封油(废机油)进行回收再利用,研究其在轮胎垫带胶中的应用。结果表明:废机油静置后分离出的上层澄清液体,以不大于4%的比例(质量含量)掺入芳烃油中,不影响芳烃油的正常使用;添加2份废机油中间层和下层分离产物,并调整加料顺序,试验配方胶料的加工性能和物理性能与生产配方相当,试验配方成品垫带的物理性能满足企业标准要求,停放后成品垫带表面无油污渗出,不变色,外观未出现异常现象。将废机油回收并用于芳烃油和垫带胶中,具有良好的经济效益和环保效应。

The waste sealing oil of mixer was recycled and applied in the tire lfap. The recycled oil contained carbon black, additives and some rubber compound. After allowed standing, the recycle oil was separated into clear oil in the upper layer and residue mixture in the middle and bottom layers. The upper layer clear oil was then added into aromatic oil and showed no negative effect on the normal use of the aromatic oil if the percentage of recycled oil did not exceed 4%. The residue mixture in the middle and bottom layers was applied in the tire lfap at the addition level of 2 phr. By adjusting the mixing process, the processing properties and physical properties of the rubber compound showed no change, and the performance of the ifnished lfap met the requirements of enterprise standard. The experimental results also showed that, there was no stain or oil bleed, no color change or appearance change after storage of the finished products. The application of recycled oil in the aromatic oil

通过调节刮膜式分子蒸馏操作参数,考察了不同类型废油再生产品透光率的变化。实验结果表明,温度升高,一级再生油的透光率下降,二级再生油的透光率上升,废内燃机油的操作温度应控制在225℃左右,废液压油的操作温度应控制在210℃左右,废混合油的操作温度应控制在215℃左右为最佳;真空度升高,一级再生油的透光率上升,二级再生油的透光率下降,废内燃机油的真空度应控制在12Pa左右,废液压油的真空度应控制在18Pa左右,废混合油的真空度应控制在16Pa左右为最佳;进料流量增加,一级、二级再生油的透光率均缓慢下降,因此应尽量维持较低流量。

Light transmittance of base oil from different waste oil was investigated using molecular distillation with adjusted parameters. Experimental results showed that transmittance of first stage base oil decreased and transmittance of second stage base oil increased with increasing temperature. Optimal temperature for waste machine oil was 225℃,210℃ for waste hydraulic fluid,and 215℃ for waste mixed oil. Transmittance of first stage base oil increased and transmittance of second stage base oil decreased with increasing vacuum. Optimal pressure for waste machine oil was 12Pa,18Pa for waste hydraulic fluid and 16Pa for waste mixed oil. When flow increased,transmittance of first stage and second stage base oil decreased accordingly.

机油稀释现象是发动机常见的试验表象之一,尤其是增压缸内直喷汽油发动机,机油稀释较明显。机油发生稀释后会破坏机油使用性能,降低运动粘度,严重时还导致机油压力下降,零部件功能丧失,发动机可靠性下降。主要分析一款1.8L GDI缸内增压直喷发动机产生机油稀释的影响因素进而对机油牌号、机油温度、水温、SOI角度、曲轴箱通风系统、活塞漏气量、喷油器布置方式进行Benchmark分析及优化验证,为改善增压直喷发动机机油稀释现象提供解决方法,机油稀释包括燃油喷射稀释和机油挥发稀释,重点探究的方向是燃油喷射稀释。

Oil dilution is one of the usual phenomena that happen during engine test,and for TDI gasoline engine that phenomenon is more obvious than that of NA engine. Oil dilution could disable oil from its nor-mal functions and lower its dynamic viscosity; in worse cases that would cause decrease of oil pressure, failure of moving parts and drop of engine''s reliability. In this paper factors having influence on oil dilution of one TDI engine with a displacement of 1.8L have been investigated,and in order to find out methods to solve that oil dilution phenomenon benchmark analysis and optimization variation have been done with oil type,oil temperature,coolant temperature,SOI angle,crankcase breath system,piston blow by and lay-out of fuel injector. Oil dilution includes both fuel injection dilution and oil evaporation dilution,in this pa-per fuel injection dilution has been investigated.

机油盘是发动机的关键部件之一，在发动机工作的影响下机油盘会产生复杂的振动，是发动机噪声的主要来源之一。因此，降低机油盘的振动和噪音是降低发动机辐射噪音和总体噪音的重要环节。对机油盘进行有限元分析建模，利用Hyper works软件计算求解，得到机油盘前十阶的固有频率。利用试验模态分析获得机油盘的试验频率，并对比机油盘仿真频率与试验获得的自由模态频率，验证了有限元计算结果的精确性。

Oil pan is one of the most important components of engines. Vibration of the oil pan excited by engine opera-tion is the main source of noise. In this paper, finite element analysis method was applied to model the oil pan. The first ten order natural frequencies of the oil pan were obtained by means of Hyperworks software. Test frequencies were obtained by using experimental modal analysis. By comparing the tested results with simulation results, the accuracy of finite element analysis was verified. This work provides a basis for structure optimization design and the analysis of forced vibration of en-gine oil pans.

烧机油是发动机常见的试验现象之一,尤其是增压缸内直喷汽油发动机,承受较高工作温度和燃烧压力,烧机油现象相对较普遍。机油的额外消耗会减少发动机正常换油里程,导致机燃比失调、加剧运动副磨损,破坏零部件使用功能、影响排放及后处理系统,严重情况下还会导致发动机发生爆燃,发动机动力下降甚至报废。主要分析一款2.0L GDI增压缸内直喷发动机烧机油的影响因素,从一环环高、油环结构、发动机回油结构、增压器机油损耗、气门密封性及活塞环岸结构、缸体网纹参数、配缸间隙、机油温度稳定性方面进行试验分析和验证。结果表明,增加一环环高、改变油环结构、改善回油不畅、优化活塞环岸和环槽结构、机油温度稳定控制、减小网纹参数Rvk均能够改善GDI发动机烧机油现象。

Oil burning is one of the common phenomenons during engine test,especially for turbocharged GDI engine,oil burning is rather common with high operating temperature and pressure. Additional oil consumption will reduce engine oil regular change mileage,lead to oil fuel ratio imbalance,increase kinematic pair wear,damage component using function,influence the emission and after-treatment system,even cause engine deflagration,thus engine power down even scrapped. This paper mainly analyzes the influencing factors of oil burning for a 2.0 L GDI turbocharged GDI engine,including piston ring height,oil ring structure,oil return layout,turbocharger oil loss,valve sealing,piston ring land, cylinder overlapping curve parameters,cylinder clearance and oil temperature stability. With the test analysis and verification,the result indicates that the oil burning of GDI can be improved by increasing piston ring height,changing oil ring structure,improving oil return,optimizing the structures