Abstract
In order to improve the reliability and the long life cycle of the lip seals, comprehensive consideration of the liquid film cavitation and JFO mass conservation boundary conditions, the geometry model of the oil seal with micro-diamonds textured on the shaft surface is given, and its mathematical model is built, the relevant numerical calculation method is used, eventually that the film pressure distribution and the micro diamond pores structure parameters effect on the seal performance are obtained under the different operating conditions. The results showed that the dynamic pressure effect caused by the diamond pores can make the oil film pressure field between the axial surface and the lip produced regular axial and radial wave change. At the same time, the change of working conditions strengthen or weaken the change law of the oil film pressure field, so which make the reliability of the liquid pressure, lubricating property and pump suction effect also change accordingly. The size, shape and pores direction of the micro-diamonds texture have great influence on the oil seal performance and lubrication characteristics, which can help to reduce the leakage rate, control the pump suction direction, stable the liquid pressure and reduce the friction. In order to improve the stability of the liquid film and pump suction effect, reduce the leakage rate, friction and wear, the axial surface micro-diamond pores texture of which the cone width ratio is 0.4-0.6, the pores depth is 1.5-4.5μm and the tilt angle is 40°-50° shall be selected for the oil seals.
Highlights
In order to improve the reliability and the long life cycle of the lip seals, comprehensive consideration of the liquid film cavitation and JFO mass conservation boundary conditions, the geometry model of the oil seal with micro-diamonds textured on the shaft surface is given, and its mathematical model is built, the relevant numerical calculation method is used, eventually that the film pressure distribution and the micro diamond pores structure parameters effect on the seal performance are obtained under the different operating conditions
With the growing expansion of high precision, cutting-edge industry, the requirements of which the environmental protection and energy saving, seal reliability and long life cycle of the types of lip seals are more and more high, so need to design and develop long use period and better performance of the new oil seals, which become a problem to be solved, lip seals with axial surface micro forming technology have been put on the agenda, and incomparable better performances than traditional oil seals are found, the rotate equipments in agricultural machinery, aerospace, marine, petroleum and petrochemical industries have been gradually put into use, and the effect is excellent
It was found that the shape, size, pores depth, pores orientation and area ratio of axial surface micro-texture[8-14] had greatly influenced on the lubrication performance of the oil seal
Summary
0.12 0.15 0.18 0.21 0.24 0.27 po/MPa (a) Fo、Kz&p0 rectangle ellipse circle square diamond. It is shown that the influence on the sealing performance of each pore texture in oil seal zone in the Fig.[3] when po changes, the solid curve in the figure corresponds to the vertical axis on the left, while the virtual curve corresponds to the vertical axis on the right (Fig.3(a)), the x-axis is shared. Q is sorted as Q(square)>Q(diamond)>Q(rectangle)>Q(ellipse)>Q(circle).When the oil side pressure is less than 0.14MPa, Kz is sorted as Kz(square)>Kz(rectangle)>Kz(diamond)>Kz(ellipse)>Kz (circle).When the scope of po is 0.14MPaKz(rectangle)>Kz(ellipse)>Kz(circle). When the po is greater than 0.21MPa, Kz is sorted as Kz (square)>Kz(diamond)>Kz(ellipse)>Kz(rectangle)>Kz(circle)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
