Planetary gear transmission gear-matching method

Abstract

The invention discloses a tooth number determination method for planetary gear transmission, and solves the problems of the prior planetary gear transmission tooth number determination technology that the number of teeth is difficult to be determined, basis of determination is not sufficient and reasonable, vibration and noise are large, etc. The tooth number determination method disclosed by the invention comprises the following steps: (1) studying out a theoretical transmission ratio according to the design conditions; (2) determining the number of teeth of a central gear and the number of planetary gears; (3) judging whether the basic assembly conditions are met; (4) correcting the number of teeth of the central gear according to various requirements for application occasions of the transmission system; (5) further correcting the number of the teeth of the planetary gears according to the number of the teeth of the central gear, and obtaining a studied-out transmission ratio; (6) judging whether the studied-out transmission ratio meets the design requirement; if the design requirements are met, executing the next step; or else, returning to step (2); (7) analyzing vibration performance of the system; judging whether harmonic resonance occurs under a given rotation speed; if harmonic resonance occurs, returning to step (2); or else, taking the tooth number determination proposal as the final result.

Description

technical field [0001] The patent of the present invention relates to the field of mechanical engineering, in particular to the design of planetary gear transmission system. Background technique [0002] A planetary gear transmission is a mechanical device that transmits motion or power. The device has the advantages of large transmission ratio, high efficiency, small size and compact structure, and is widely used in aircraft, ships, automobiles and other fields. [0003] Among various planetary gear transmissions, 3K (II) planetary transmission is a common transmission form, as shown in Figure 1. The figure shows the basic structure of 3K (II) planetary gear transmission, including central external gear a, central internal gear b, central internal gear e, planetary gear c and planet carrier x. Generally, this transmission is suitable for short-term work, and has the advantages of compact structure and large transmission ratio. Especially in small power transmission occasi...

AI Technical Summary

Problems solved by technology

The tooth matching method of the present invention provides how to determine the number of sun gear teeth and the number of planetary gears of the planetary gear transmission, so as to solve the problems existing in the existing planetary gear transmission, especially the 3K (II) type planetary gear transmission tooth matching technology. Difficult, insufficient and reasonable basis, large vibration and noise, etc.

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