Determining efficiency of cycloid reducers using different calculation methods

Matejić, Miloš; Blagojević, M; Cofaru, Ileana Ioana; Kostić, Nikola; Petrović, Nenad; Marjanović, Nenad

doi:10.1051/matecconf/201929001008

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…On the other hand, the authors of [3] presented and compared two methods (Malhotra's and Gorla's methods) for determining the efficiency of a single-stage cycloidal reducer. In [4], a comparative analysis of three analytical methods for determining the efficiency of a cycloidal drive is presented, and the results of the analyses are compared with the results of experimental tests. The effect of friction on the distribution of forces in the rolling nodes of the cycloidal reducer and the value of the friction torque and efficiency were discussed in [5].…”

Section: Introductionmentioning

confidence: 99%

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Determination of Mechanical Power Loss of the Output Mechanisms with Serially Arranged Rollers in Cycloidal Gears While Taking into Account Manufacturing Tolerances

Antoniak,

Bednarczyk

2024

Machines

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Despite their complex design, cycloidal gearboxes are characterized by high efficiency. Nevertheless, due to friction, some power is lost during gearbox operation. Basically, these losses occur in two structural nodes: the cycloid gearing and the output mechanism. Since the first of these nodes has been well discussed in the literature, the output mechanism will be discussed in this article. The design of the output mechanism has a significant impact on mechanical power losses. There are several mechanism design solutions. One of them is a mechanism with serially arranged rollers. Three solutions that are different in design but work identically will be discussed. Due to this affinity, a single, common mathematical model will be used to determine the value of losses. As will be shown, the value of losses is directly affected by the backlash, number, and diameter of the rollers used in the output mechanism and indirectly by the ratio and eccentricity of the cycloidal gearbox. Sample calculations were carried out using the developed model of mechanical power losses in the output mechanism. This made it possible to analyze the distribution of backlash created by manufacturing tolerances. It was also shown that the backlash has a significant effect on the number of rollers involved in torque transmission, as well as on the distribution of loads, contact pressures, and mechanical power losses.

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Section: Introductionmentioning

confidence: 99%

“…Cycloid gearboxes with a pin output mechanism are commonly used. They are widely described and studied [1][2][3][4][5][6][7][8][11][12][13]. Alternatively, mechanisms with rollers can be used.…”

Section: Introductionmentioning

confidence: 99%

Determination of Mechanical Power Loss of the Output Mechanisms with Serially Arranged Rollers in Cycloidal Gears While Taking into Account Manufacturing Tolerances

Antoniak,

Bednarczyk

2024

Machines

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“…In this paper, a tool profiling algorithm is proposed, which is based on the capacity to measure and represent some surfaces in a methodical cloud of points form. The case of generating with a hob mill tool is studied and a numerical application was made for the profiling of tools that generate the disk from the structure of a cycloidal reducer [13][14][15]. The application was made for the case where the profile to be generated is known in discrete form.…”

Section: Introductionmentioning

confidence: 99%

Profiling of the Hob Mill Tool for Generating a Profile Known in Discrete Form

Teodor,

Moroșanu,

Baroiu

et al. 2023

IJMMT

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In industrial practice, is sometimes needed to manufacture specific parts without blueprints. This part of engineering process is known as reverse engineering. Usually, this assumes that an existing piece is measured or scanned and based on this result is made a new part. If the part can be machined with universal cutting tools the manufacturing process don’t rise problems, but in case of parts which needs specific tools, these must be designed to be suitable for machining the piece. In this paper, a tool profiling algorithm is proposed, which is based on the capacity to measure and represent some surfaces in a methodical cloud of points form. The proposed profiling algorithm is based on the “virtual pole” method. This method is used together with the intermediate surface theorem for profiling tools characterized by a helical primary peripheral surface. This article will represent a continuation of a research which was been published in 2021, in Bulletin of Polytechnic Institute from Jassy. In that published article, the profiling of the hob mill tool was presented in a theoretical way and the ”virtual pole” theorem was applied for an any type of profiles. The proposed algorithm allowed the determination of the tool’s profile reciprocally enveloping with a piece’s profile known in discrete form. Now, in this paper, the discrete form profile will represent exactly a cycloidal disk from a cycloidal reducer whose coordinates were determined using specific reverse engineering processes. Considering that the determination of the relative movements between the tool and the part, as well as the determination of the enveloping condition are relatively complicated and can be a source of errors, the purpose of this work is to highlight the advantages of the ”virtual pole” method compared to the other specific methods of tool profiling that generate by enwrapping. At the same time, it is investigated if the ”virtual pole” method can provide a support for the identification of the intermediate surface, with the help of graphic design environments, for profiling, in this case, the worm tools, since the ”virtual pole” method cannot be applied as such in the case of disk-type tools, worm tools and cylindrical-frontal tools, due to the fact that the theorem is intended for the study of planar gearing. The advantages of using the ”virtual pole” method are obvious compared to the classical tool profiling methods. The results demonstrated the accuracy of the method, by the fact that, using the ”virtual pole” method, the calculation time for profiling the hob mill tool for generating a profile known in discrete form, namely the profile of the cycloidal disk, is significantly reduced.

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