Search results for "Belt drive"

showing 8 items of 8 documents

SHEAR COMPLIANCE AND SELF WEIGHT EFFECTS ON TRACTION BELT MECHANICS

2007

The transverse elastic deflection of a traction belt along the free span depends mainly on the flexural stiffness, but may be significantly influenced by the distributed weight and the shear compliance, which affect together the width of the arc of contact. In particular, the shear compliance yields a virtual decrease of the flexural stiffness, flattens the free span and increases the wound regions, to the advantage of the transmissible torque. Moreover, the tensioning of a given belt may be somewhat larger, in comparison with the ideal circular-straight path with the same centre distance, because of the increased length of the deflected belt trajectory due to gravity. The present paper ad…

0209 industrial biotechnologyEngineeringbusiness.industryMechanical EngineeringBelt frictionFlexural rigidity02 engineering and technologyMechanicsStructural engineeringBelt driveWKB approximationTransverse plane020303 mechanical engineering & transports020901 industrial engineering & automation0203 mechanical engineeringShear (geology)Deflection (engineering)Torquebusiness
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Variational approach to the mechanics of metal V-belt systems

2005

The mechanical behaviour of metal V-belt drives is strongly dependent on the elastic properties of both the belt and the pulley, which influence the belt penetration into the groove and the sliding on the pulley wall. The distribution of tension and penetration is quite different from the rubber belts, which may be dealt with in the assumption of perfectly rigid pulleys. The restoring effect of the centrifugal forces of the plate elements has also to be taken into account. The present analysis considers the combination of all those effects, choosing a three parameter deformation function to describe the plate bending and applying the principle of virtual work for the calculation of the unkn…

Centrifugal forceEngineeringbusiness.product_categorybusiness.industryMechanical EngineeringBending of platesMechanicsStructural engineeringBelt driveFinite element methodPulleyMethod of characteristicsDeflection (engineering)Automotive EngineeringVirtual workbusinessInternational Journal of Vehicle Design
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A Note on the Shear Influence on Belt Drive Mechanics

2007

Abstract Belt drives work often with short center distances and very different wrap arcs so that high adherence characteristics are required at the belt-pulley contact. In addition, the belt flexural stiffness reduces the contact width, but this decrease may be compensated in part by the belt softening due to the shear compliance.

Engineeringbusiness.industryMechanical EngineeringBelt frictionFlexural rigidityMechanicsStructural engineeringBelt driveComputer Graphics and Computer-Aided DesignComputer Science ApplicationsShear (geology)Mechanics of MaterialsbusinessSofteningJournal of Mechanical Design
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A Simple Model for the Axial Thrust in V-Belt Drives

1996

Simple formulas can relate axial thrust and torque of rubber V-belt drives, taking into consideration the radial penetration of the belt.

Engineeringbusiness.industryMechanical EngineeringNumerical analysisAxial thrustThrustMechanicsMechanical driveBelt driveComputer Graphics and Computer-Aided DesignComputer Science ApplicationsNatural rubberMechanics of MaterialsSimple (abstract algebra)visual_artForensic engineeringvisual_art.visual_art_mediumTorquebusinessJournal of Mechanical Design
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A Theoretical Approach to the Shift Mechanics of Rubber Belt Variators

2008

This paper proposes a theoretical description of the mechanical behavior of rubber belt variators during the speed ratio shift. Comparing with the steady operation, the mass conservation of the belt is completely reformulated considering an elementary dihedral control volume between two planes through the pulley axis and balancing the inside mass variation with the total mass flux through the control surface. On the other hand, the belt equilibrium conditions are similar to the steady case, as the inertia forces due to the shifting motion are negligible with respect to the other forces. Assuming a one-dimensional belt model, it is shown that adhesive regions may appear inside the arc of con…

Mass fluxConservation lawEngineeringbusiness.product_categorybusiness.industryMechanical Engineeringmedia_common.quotation_subjectBelt frictionMechanicsBelt driveInertiaComputer Graphics and Computer-Aided DesignControl volumeComputer Science ApplicationsPulleyMechanics of MaterialsbusinessConservation of massmedia_common
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Full Sliding “Adhesive-Like” Contact of V-Belts

2002

Abstract Analysis of power transmission in a belt drive consisting of e. g. two pulleys might be treated as a boundary value problem. Tight side tension FT, slack side tension FS and the wrap angle α are the three natural boundary conditions. In the literature, theories are developed where seating and unseating as well as the power transmitting part of the contact are considered. The solutions presented so far don’t fulfil the boundary conditions properly, since a certain tension ratio FT/FS is associated with a certain contact angle and not an a priori specified one. It appears that a new type of full sliding solution must be introduced to handle the boundary condition problem. During part…

Power transmissionEngineeringbusiness.product_categorybusiness.industryTension (physics)Mechanical EngineeringMathematical analysisBelt driveType (model theory)Computer Graphics and Computer-Aided DesignComputer Science ApplicationsPower (physics)PulleyContact angleMechanics of MaterialsCalculusBoundary value problembusinessVolume 6: 8th International Power Transmission and Gearing Conference
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A Qualitative-Quantitative Approach to V-Belt Mechanics

1996

A simplified formulation is adopted for the theoretical problem of tension distribution and radial penetration of a V-belt along the pulley groove. The trajectory portrait of the second order differential system describing the belt behavior is carefully analyzed and asymptotic approximations for the tension solutions are derived which are well suited for design purposes.

business.product_categoryMechanical EngineeringNumerical analysisMechanicsBelt driveDifferential systemsComputer Graphics and Computer-Aided DesignAnalyse qualitativeComputer Science ApplicationsPulleyQualitative analysisMechanics of MaterialsbusinessMathematicsJournal of Mechanical Design
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Implicit regulation for automotive variators

2001

A well-known practice uses mechanical variators to realize the so-called continuously variable transmissions (CVTs) for automotive application. A remarkable problem for one of the most used CVTs is given by the hydraulic control of the axial thrust on the half-pulleys that is necessary for torque transmission. It involves a heavy decrease in transmission efficiency. In the present paper, the possible production of the required axial thrust by a simple spring to eliminate hydraulic losses is analysed. It is shown that the power capacity of such a regulated variator is near to the maximum possible, and the belt torque loss is always considerably lower than the sum of the belt and pump losses…

mechanical transmissionEngineeringVariatorAutomatic transmissionContinuously variable transmissionsbusiness.industryMechanical Engineeringthrust regulationAerospace EngineeringThrustBelt driveSettore ING-IND/13 - Meccanica Applicata Alle Macchineautomotive applicationlaw.inventionPower (physics)Control theorylawsplit power transmissionsLimit (music)TorquebusinessSlip (vehicle dynamics)
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