Abstract
In a pair of actual gears alternating meshing process, the transmission system errors and thermal elastic deformation of the gear teeth can cause gears in the meshing zone to form high contact pairs inconsistently mesh-in and mesh-out points to deviate from the theoretical line, which will lead to sudden changes in meshing velocity and an instantaneous meshing effect. Offline meshing impact generates large additional loads, and it increases the vibration and noise of gear transmission system. Further, the gear teeth mesh-in impact is significantly greater than that of gear teeth mesh out. Therefore, to analyze the impact with the minimum value of gear teeth mesh in, the initial mesh-in points need to be determined, and the meshing impact velocity and impact force of teeth meshing-out need to be calculated. The optimized meshing tooth-pair contact interface (CI) anti-impact numerical calculation mode is validated using the loaded teeth contact analysis method.
Highlights
Gears with teeth meshing are subject to mild to considerably severe meshing effects that depend on the extent and distribution of the gear transmission errors
(2) The results show that the minimum value of mesh-in impact after modification decreased by 10 %, i.e., the minimum value of mesh-in impact reduced by 90 %; (3) After optimizing the modification, a single tooth meshing area is generated on the tooth surface; this area is expanded further than that using the no modifications
The gear meshing impact combined with the mesh-in impact velocity model was proposed to analyze the teeth surface optimized modification
Summary
Gears with teeth meshing are subject to mild to considerably severe meshing effects that depend on the extent and distribution of the gear transmission errors. Even if a meshing gear in the time domain has an accurate involute tooth profile under working conditions, the gear teeth will change the base joints of the driving and driven gears to the position of the meshing line This is attributed to the deformation of the gear tooth load and the installation error under the initial action of the meshing force which is no longer equal, and it causes gear tooth surface interference that deviates the meshing point from the normal meshing line [4,5,6]. The time-domain transmission error and gear tooth deformation in the working condition causes the normal joint of the meshing gear pair to be unequal and deviate from the theoretical meshing line at the mesh-in and mesh-out points, which results in a transient meshing impact because of the abrupt changes in rotational speed. This article focuses on mesh-in impact; the initial mesh-in point position is determined and the initial mesh-in impact velocity and force are calculated to evaluate the mesh-in impact
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