scholarly journals Computational and experimental analysis of the churning power losses in an industrial planetary speed reducer

2012 ◽  
Author(s):  
F. Concli ◽  
C. Gorla
Keyword(s):  
Experimental Analysis ◽  
Power Losses ◽  
Speed Reducer

scholarly journals The influence of the cycloid disc bearing type on the cycloidal speed reducer efficiency

2021 ◽  
Vol 343 ◽  
pp. 01004
Author(s):  
Milan Vasic ◽  
Mirko Blagojevic ◽  
Miloš Matejic ◽  
Ileana Ioana Cofaru
Keyword(s):  
High Efficiency ◽  
Rapid Expansion ◽  
Future Research ◽  
Power Losses ◽  
Rolling Bearings ◽  
Axial Forces ◽  
Different Types ◽  
Speed Reducer ◽  
Gear Trains ◽  
Compact Design

The robotics industry has experienced a rapid expansion in the last decade. As a result, the market of speed reducers with high gear ratios, high precision and a compact design is growing rapidly. In addition to these characteristics, it is very important for gear trains to have high efficiency. Because of their compact design, cycloidal speed reducers are not exposed to axial forces, which is their important characteristic. This means that radial bearings can be used in their supports. The bearing type has significant effects not only on the design and dimensions of the cycloid speed reducer but also on its efficiency. In this paper, an analysis of power losses for different types of rolling bearings of a cycloid disc has been performed. At the end of the paper, concrete conclusions are presented as well as directions for future research.

Theoretical and Experimental Analysis of a Cycloidal Speed Reducer

2008 ◽  
Vol 130 (11) ◽  
Author(s):  
Carlo Gorla ◽  
Piermaria Davoli ◽  
Francesco Rosa ◽  
Claudio Longoni ◽  
Franco Chiozzi ◽  
...  
Keyword(s):  
Theoretical Model ◽  
Structural Characteristics ◽  
Design Procedure ◽  
Mechanical Efficiency ◽  
Design Parameters ◽  
Ring Gear ◽  
Power Losses ◽  
Transverse Profile ◽  
Speed Reducer ◽  
Simplified Procedure

In this paper, a theoretical and experimental investigation on an innovative cycloidal speed reducer is presented. The typical cycloid drive has a planet wheel, the profile of which is the internal offset of an epitrochoid meshing with cylindrical rollers connected to the case. This reducer, on the contrary, has an external ring gear, the transverse profile of which is the external offset of an epitrochoid and engages with the planet wheel by means of cylindrical rollers. This paper investigates the structural characteristics and the kinematic principles of this type of reducer. A theoretical approach based on the theory of gearing (following Litvin’s approach) is developed and compared to a development of Blanche and Yang’s approach. Furthermore, a simplified procedure to calculate the force distribution on cycloid drive elements, its power losses, and theoretical mechanical efficiency is presented. The effects of design parameters on the values of forces are studied for an optimal design of this type of reducer. The theoretical model is tuned on the basis of the results of tests made on purpose. The mechanical efficiency dependency on speed and torque is described. The main aim of this work is to tune a theoretical model in order to predict the operating behavior of the cycloid drive and to improve its design procedure.

Spectroscopic Diagnostics of Tokamaks

1988 ◽  
Vol 102 ◽  
pp. 165-174
Author(s):  
C. de Michelis
Keyword(s):  
Transport Properties ◽  
Power Losses ◽  
Spectroscopic Diagnostics ◽  
Important Concern

AbstractImpurities being an important concern in tokamaks, spectroscopy plays a key role in their understanding. Techniques for the evaluation of concentrations, power losses and transport properties are surveyed, and a few developments are outlined.

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