Year-end Sale % OFF 
Abstract
The paper presents the results of experimental researches of the basic working capacity characteristics of pulsed variable-speed drives - gear ratio, efficiency factor, and reliability of the eccentric free-wheel mechanisms When conducting research, the main working capacity parameters of the pulsed variable-speed drive (independent factors) changed according to the design of experiment in the range: the load applied to the output shaft was from 250 to 2.750 N·m; adjustable gear ratio - from 20 to 180. It was established that the reliability of the eccentric free-wheel mechanisms is guaranteed when making mechanisms of 100Cr6 steel with hardness not lower than HRCЭ 58…62 with a module of at least 0.75 mm. It was shown that the yield surface, which characterizes the change in the gear ratio of the pulsed variable-speed drive, can be described by a model using first-order polynomials. It was established that with increasing load, a slight increase (at 1.0...9.9%) occurs in the adjusted gear ratio, which has a character close to linear. It was concluded that with an increase in load, the increase in efficiency factor is non-linear and equals 1.8...2.6 times, an increase in the gear ratio causes its linear decrease by 1.13...1.64 times in the dependence close to a linear one. Empirical dependences are obtained to determine the magnitude of the gear ratio and efficiency factor.
Highlights
In modern machines, along with the electric and hydraulic infinitely variable transmissions, the mechanical infinitely variable transmissions are widely used.The use of infinitely variable transmissions in the drives of machines allows to increase their technical and economic indicators [1,2,3,4,5].These include pulsed variable-speed drives, which are compact in terms of unit power
They have a wide range of control of frequency-amplitude characteristics, they can be automatic and combine the functions of the reduction drive [6,7,8,9,10,11]
When the pulsed variable-speed drive is in operation, they function under high switching frequency reaching 50 Hz, under significant transmitted torque, and dynamic loads
Summary
Along with the electric and hydraulic infinitely variable transmissions, the mechanical infinitely variable transmissions (variators) are widely used. The use of infinitely variable transmissions in the drives of machines allows to increase their technical and economic indicators [1,2,3,4,5] These include pulsed variable-speed drives, which are compact in terms of unit power. The main characteristics that determine the performance of the pulsed variable-speed drive are – gear ratio, efficiency, reliability of the free-wheel mechanisms [12,13,14,15,16,17,18]. The second approach involves an indirect assessment, when the performance of the pulsed variable-speed drives is determined by the reliability of the most loaded elements. To estimate its working capacity, a calculation and experimental method was chosen
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
