Method of axial adjustment for precessional transmissions

Abstract

Axial adjustment method for precessional transmissions includes compensation error calculation, determination compensator groups, achieved in the form of base and auxiliary rings. The compensator has on the base ring axial canals in which can be placed clamping bolts but the auxiliary ring has axial holes for the screws. The auxiliary ring is formed from increasing sectors - the distance between auxiliary ring stairs and front side of body, from decreasing sectors - the distance between base ring and bottom place, and the closure element - the clearance between gear body and the front surface of the base ring. According to the method of group interchangeability is determined the deviation value of the upper and lower group tolerance and the clearance between lid and body. Then rotating one of the rings is ensured the dimension of the compensator which must match to compensation clearance value and then the compensator is adjusted to required value.

Particularities of Tribological Behavior of the Contact Elements of the Precessional Gear, Made of Metallic and Plastic Materials

“…The transmission with precessional motion of the satellite, first proposed and patented by the first author of this paper, appeared as a result of the search for a solution to a fundamental problem such as -combining in a single mechanical transmission three performances: extended kinematic possibilities, high bearing capacity and minimal energy losses. These aspects of the problem in question dominated in all objectives throughout the research and development of precessional transmissions (PT), the answer being determined by the following very conclusive and important findings in the field of research [1][2][3][4]:  the expansion of the kinematic possibilities resides in the K-H-V and 2K-H type structures themselves, which by the range of retalled transmission ratios have no analogue among known mechanical transmissions [1];  increase in bearing capacity of the gears A B with bolts is due to the multiplicity of gearing with up to 100% pairs of teeth, simultaneously engaged, and of gears A D (with straight teeth) and A D,β (with inclined teeth)the multiple pair "convex-concave" contact geometry ot the teeth, with little difference in radii of curvature [2];  the increase in the mechanical efficiency of the TP due to the reduction of the relative sliding friction between the conjugated flanks, the improvement of the lubrication conditions by creating interdental cavities for the accumulation of lubricant, including by increasing their rolling rate due to the spherospatial motion of the satellite [3]. As mentioned in [2,5], to realize the special importance of these three performances, it is enough to perceive the dimensions of economic efficiency, obtained only from the reduction of energy losses in mechanical transmissions.…”