Selection of Displacement Coefficients in External and Internal Involute Gearing of Planetary Rotor Hydraulic Machine

Authors

  • D. A. Kurasov Kurgan State University

DOI:

https://doi.org/10.22213/2413-1172-2021-2-53-59

Keywords:

planetary mechanism, involute gearing, planetary rotor hydraulic machine, quality factors gearing, tool offset, tolerance range

Abstract

Hydraulic and pneumatic displacement machines are one of the most important and integral elements of modern mechanical systems. One of the known types of such machines is planetary rotary hydraulic machines (PRHM) with floating satellites in contact with central gears. In this case, the wave numbers M and N of the central gears can be both different and the same. The paper considers the case of the same number of waves when the central gears are round. Planetary rotary hydraulic machines with the same number of teeth of central gears are feasible in a fairly wide range of parameters. The paper proposes an algorithm for selecting the range of permissible values of displacement coefficients of a planetary rotor hydraulic machine, which are based on a planetary mechanism with central gears of internal and external gearing having the same number of teeth. It is proposed to obtain the same number of teeth using maximum values of positive displacement of the tool when processing the central gear with internal gearing. The calculation was carried out in the corresponding sequence by formulas according to GOST 16532-70 and GOST 19274-73, based on the module «Shafts and Mechanical Transmissions» of the Kompas 3D software complex. At the same time, the geometric parameters of involute teeth of such a mechanism are subject to strict limitations of the planetary mechanism of the PRHM, which correspond to qualitative indicators of the gearing. According to the algorithm proposed in the paper, the areas of permissible values of the displacement coefficients of the initial outline of the tool when processing PRHM gear links with the same number of teeth are constructed. Obtained areas allow to select initial geometrical parameters of a planetary mechanism, which is based on PRHM, taking into account qualitative indicators of the gearing. The mentioned geometrical parameters are used at the first stage of the engineering procedure for obtaining profiles of non-circular gear links of PRHM in the form necessary for their manufacture, for example, using 2D-technologies. The most promising use of planetary rotary hydraulic machines for gas working media is vacuum pumps, pneumatic motors, and compressors. Advantageously, this technique can be used in mechanisms for implementing the variable gear ratio.

Author Biography

D. A. Kurasov, Kurgan State University

PhD in Engineering

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Published

13.07.2021

How to Cite

Kurasov Д. А. (2021). Selection of Displacement Coefficients in External and Internal Involute Gearing of Planetary Rotor Hydraulic Machine. Vestnik IzhGTU Imeni M.T. Kalashnikova, 24(2), 53–59. https://doi.org/10.22213/2413-1172-2021-2-53-59

Issue

Section

Articles