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| The influence of approach impact load on elasto-hydrodynamic lubrication of involute spur gears |
| Received:March 27, 2008 |
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| DOI：10.7511/jslx20103025 |
| KeyWord:approach impact load spur gear transient EHL non-newtonian fliud thermal EHL |
| Author | Institution |
| 王优强 |
青岛理工大学 机械工程学院,青岛 |
| 畅通 |
青岛理工大学 机械工程学院,青岛 |
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| Abstract: |
| Based on the multi-grid (MG) method for solving the pressures, the multi-level multi-integration (MLMI) approach for evaluating the elastic deformations, a sequential column sweeping scheme for solving the energy equations, A full transient non-Newtonian thermal elasto-hydrodynamic lubrication(EHL) solution of an involute spur gear is obtained under approach impact load, which takes into account the variation of equivalent curvature , entertainment velocity and load on time along the line of action, considers the lubricant thermal and rheological effects as Ree-Erying fliud and the gear tooth surface is assumed to be smooth. The influences of load spectrum, which the load is carried by one pair of teeth and two pairs of teeth repeatedly, and the approach impact load when the teeth come into action on the EHL pressure, film thickness and oil temperature rise are analyzed in the paper. The results show that the approach impact load can strongly influence the approach point maximum pressure, oil temperature rise and minimum film thickness. The maximum pressure, the maximum friction coefficient, the highest oil temperature and the minimum film thickness all occur in the vicinity of approach point immediately after the impact load was feed. The approach impact load is seriously harmful to the gear lubrication. |
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