01About This Special Issue
Gear continuously variable transmission or toothed CVT represents the planetary mechanism in which wheels form the closed kinematic chain in the form of closed contour. Gear CVT has constant engagement of wheels and secures the variable transfer ratio which depends on the torque. The transfer works automatically without any control system. Gear CVT has been created by inventors intuitively as essentially new mechanism having two degrees of freedom. Action of such mechanism could not be described theoretically on the basis of the existing theory of mechanisms with one degree of freedom. Numerous researches and numerical checks have allowed to formulate the main differences gear CVT from existing mechanisms and to describe theoretically its work.The main difference of transfer is defined by presence of the closed contour. The new theoretical approach provides the analysis of equilibrium of separate links and the subsequent association of the received equations. Essentially new theoretical substantiation gear CVT has been executed on the basis of mechanics laws.
However long time the transmission was considered efficient only in the presence of an internal friction or additional resistance on one of wheels. Only recently it has been proved that the closed contour possesses unique property. Energy circulation in a contour creates the additional constraint which provides definability of the kinematic chain motion. There was a theoretical substantiation of gear continuously variable transfer as definable mechanical system with ideal constraints.
The developed theory is the tool of the analysis and synthesis of essentially new kind of transfers-the stepless gear transmissions adapting for variable technological loading.
The developed theory of force adaptation in the mechanics allows using the found effect of force adaptation for creation of basic new highly effective systems in various branches of techniques.
Let's list main routes of use of adaptive transmissions:
automatic mechanical gear box for easy and heavy transport techniques, adaptive drive of a drawing bench, adaptive drive of a lathe, adaptive motor-wheel, adaptive drive of transport cart, adaptive drive of manipulator, adaptive vibrating drive, adaptive tackle purchase, adaptive drive of sport techniques, automatic self-controlled electric drive, adaptive drive of electric motor car, adaptive drive of wind turbine, adaptive drive of piston of the hydro cylinder.
02Meet the Guest Editors
Our distinguished editors bring deep subject-matter expertise to curate high-quality research and ensure a rigorous peer-review process.
Lead Guest Editor
Konstantin Samson Ivanov
Applied Mechanics, Almaty University of Power Engineering and Telecommunications, Almaty, Kazakhstan
Guest Editor
Malek Gassoumi
Department of Physics, College of Science, university of Qassim, Buraydah, Saudi Arabia
Guest Editor
biao xu
songjiang distinct, longteng road NO.333, Shanghai CHINA, China
Guest Editor
mojtaba ashouri
mechanical engneering, shahrood university of technology, Iran
Guest Editor
Mojtaba Ashouri
Department of Mechanical Engneering, Shahrood University of Technology, Shahrood, Iran
03Published Articles
The following articles have been published in this special issue.
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Adaptive Transmission of Wind Turbine
Issue: Volume 2, Issue 6-1, November 2014Pages: 35-38Received: 10 October 2014Accepted: 15 October 2014Published: 27 December 2014DOI: 10.11648/j.ajma.s.2014020601.17Downloads:Views:Abstract: Adaptive transmission represents a wheelwork which is converting a variable rotational velocity of a wind wheel to constant rotational velocity of the generator shaft. Advantages of adaptive transmission: simplicity and reliability. The principle of act of adaptive transmission is based on use of the “Effect of force adaptation” in the kinematic ch... Show More -
Traction Cart with Adaptive Drive
Issue: Volume 2, Issue 6-1, November 2014Pages: 29-34Received: 5 October 2014Accepted: 26 December 2014Published: 27 December 2014DOI: 10.11648/j.ajma.s.2014020601.16Downloads:Views:Abstract: Wheel steams of an electric rolling stock are drive in rotation by traction engines which are placed in traction carts. Individual traction drive at which each wheel pair is drive in rotation by the traction engine has received wide application. In this drive the district speeds of wheels of wheel pairs appear different. It is necessary to create t... Show More -
Vibratory Gear Adaptive Transmission
Issue: Volume 2, Issue 6-1, November 2014Pages: 25-28Received: 5 October 2014Accepted: 10 October 2014Published: 27 December 2014DOI: 10.11648/j.ajma.s.2014020601.15Downloads:Views:Abstract: Drives of machines which are used now do not possess ability to be adapted for extreme working conditions. Such conditions are connected with possible difficulties of motion because of deviations from operation norms (for example, because of long inactivity, deterioration of conditions of lubricant, minor damages, a temperature difference, etc.). I... Show More -
Creation of Gear Adaptive Transmissions Manufacture
Issue: Volume 2, Issue 6-1, November 2014Pages: 21-24Received: 5 October 2014Accepted: 10 October 2014Published: 27 December 2014DOI: 10.11648/j.ajma.s.2014020601.14Downloads:Views:Abstract: The project provides the organization of creation of machine-building manufacture of essentially new highly effective transmissions for motor industry on the basis of Machine-building factory (Saint- Petersburg, Almaty). Object of manufacture is the techniques created on the basis of science discovery by scientists and designers of university AUES ... Show More -
Automatic-Box (CVT) without Hydraulics
Issue: Volume 2, Issue 6-1, November 2014Pages: 13-20Received: 22 August 2014Accepted: 26 August 2014Published: 27 December 2014DOI: 10.11648/j.ajma.s.2014020601.13Downloads:Views:Abstract: Mechanical automatic-box is developed on the basis of discovery «Effect of force adaptation in mechanics». Automatic- box represents the gear differential with two degrees of freedom which has a cogwheels closed contour. Closed contour imposes additional constraint on motion of links and provides definability of motion. Automatic-box has constant e... Show More -
Theory of Gear Adaptive Transmission
Issue: Volume 2, Issue 6-1, November 2014Pages: 5-12Received: 29 October 2014Accepted: 4 November 2014Published: 27 December 2014DOI: 10.11648/j.ajma.s.2014020601.12Downloads:Views:Abstract: Gear adaptive transmission represents itself as the gear variator with the variable transfer ratio. Unsuccessful attempts of creation of a gear variator were undertaken repeatedly. The main problem is - maintenance of constant gearing of cogwheels of a variator. The decision of this problem is based on use of science discovery in the kinematic chai... Show More -
Issue: Volume 2, Issue 6-1, November 2014Pages: 1-4Received: 1 November 2014Accepted: 5 November 2014Published: 27 December 2014DOI: 10.11648/j.ajma.s.2014020601.11Downloads:Views:Abstract: Paradox of the mechanism theory has been detected in connection with attempts of practical use mechanism with two degree of freedom and one entry for achievement of power adaptation. According to the mechanism theory and machines such mechanism is statically indefinable. However recently there were patents and publications with the description of e... Show More
