ZDDP ANTIWEAR ADDITIVE-MOTOR BASE OIL BLEND AND TRIBOCHARGING IN THE METAL SHAFT-OIL-LIP SEAL INTERFACIAL SYSTEM
Tribocharging in a rotating shaftmotor base oil-lip seal system has been identified as one of the phenomena that can affect the work of the system and be some cause for an increase in the braking torque of a rotating shaft 1,2. This paper presents the results of experiments on tribocharging of the blends of mineral and synthetic motor base oils and ZDDP (zinc dialkyldithiophosphate) for different ZDDP contents. Experiments have been performed in a specially built test stand whose essential part is a simplified model of an engine crankcase (sump). The system: rotating shaft-oil-lip seal constitutes a friction junction where a metal shaft rotates at given various angular velocities. The junction is similar to that in each motor car, namely a crankshaft, a sump (crankcase), and a seal. The results obtained show some dependences of the electric potential induced in a stiffening ring of a rotary lip seal on the shafts angular velocity and on the oil temperature. In general the ZDDP content causes tribocharging of the blend of base oils and ZDDP to be increased, but there is a critical value of the ZDDP contents above which the tribocharging process decreases.
motor base oil ZDDP(zinc dialkyldi-thiophosphate) rotating shaft lip seal tribocharging
Juliusz B.Gajewski Marek J.Glogowski K.Gatner
Electrostatics and Electrothermal Engineering Research Group,Department of Electrical and Thermal Po Faculty of Chemistry,University of Wroclaw,F.Joliot-Curie 14,50-383 Wroclaw,Poland
国际会议
The 6th International Conference on Applied Electrostatics(第六届国际静电应用会议)
上海
英文
350-353
2008-11-03（万方平台首次上网日期，不代表论文的发表时间）