Use of thrust cone bearings to increase efficiency of helical gears

推力锥提供了一个很好的机会，以提高效率的斜齿轮。作为流体动力轴向滑动轴承，它们补偿由靠近其原点的斜齿轮产生的轴向力。由于推力锥和节圆之间的距离很小，因此推力锥轴承在运行期间的差速低于传统的轴向轴承，这导致摩擦损失的显着减少。该项目的目的是更好地了解整个系统的推力圆锥轴承，以制定特定应用的设计指南，并扩大该技术的应用范围。除了第一个项目阶段的工作，其中特别是从混合摩擦区域到流体动力润滑区域的过渡行为进行了研究，推力锥在混合润滑状态下运行的边界应在第二个阶段确定。尽管如此，推力圆锥轴承的通常操作点显然是在流体动力润滑领域，实际上，当需要穿过混合摩擦区域时，损坏主要发生在启动和制动情况期间。通过在IMW的双盘试验台上进行广泛的实验研究来确定设计特性，旨在通过可靠的疲劳寿命预测来实现推力圆锥轴承的资源效率设计。第二阶段的另一个方面是与传统轴承齿轮相比，推力锥传动系统性能的机器动态视图。为此，应检测推力圆锥轴承对振动和阻尼行为以及传动系统效率的影响，一方面通过使用多体模拟进行模拟，另一方面通过构建比较齿轮组进行实验。通过该项目，推力锥技术的性能将进一步提高，以促进更节能的传输。

Thrust cones offer an excellent opportunity to raise the efficiency of helical gears. As a hydrodynamic axial sliding bearing they compensate axial forces generated by the helical gears close to their point of origin. Due to the small distance between thrust cone and pitch circle the differential velocity during operation is lower in the thrust cone bearing than in conventionally axial bearings, which leads to a significant reduction of friction losses. Aim of the proposed project is to gain better understanding about the overall system thrust cone bearing to develop application specific design guidelines and expand the limits of application for this technology. In addition to the work of the first project period, in which especially the transition behavior from mixed friction area to hydrodynamic lubrication region was investigated, boundaries for thrust cones operating in mixed lubrication regime shall be determined in the second period. Even so the usual point of operation for thrust cone bearings is clearly in the field of hydrodynamic lubrication, in practice damages mainly occur during start-up and braking situations when the mixed friction region needs to be traversed. The determination of design characteristics by extensive experimental studies on the twin-disc test rig at the IMW are intended to allow resource-efficient design of thrust cone bearings with a reliable fatigue life prediction. A further aspect of the second period is the machine dynamic view on the system behavior of thrust cone transmissions compared to gears with conventional bearings. For this purpose the effects of the thrust cone bearing on the vibration and damping behavior and the efficiency of the transmission system shall be detected, on the one hand simulative by using multi-body-simulations, on the other hand experimentally by building a comparing gear set. Through the project the performance of the thrust cone technique shall be further increased to contribute to more energy efficient transmissions.