The Contact Pressure Between Rope and Sheave

Heller, S. R.

doi:10.1111/j.1559-3584.1970.tb05195.x

Cited by 6 publications

(5 citation statements)

References 1 publication

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“…The circumferential surface of the pulley was made reflecting and the photoelastic observation made as described in method 3. The tensile force in the belt was obtained using the simplification of method 3 and is shown in Fig 11. The pressure, Or, was obtained from equation (4). The results obtained using the exponential law are also shown in Fig 11 computed for p=0.6 which was the approximate value of the coefficient of friction for aluminized rubber over rubber.…”

Section: Rubber Beltmentioning

confidence: 97%

State of stress and strain in a rectangular belt pulled over a cylindrical pulley

Durelli

Buitrago

1973

Strain

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This paper deals with the contact pressure between a belt and the pulley to which it transmits force and with the bending and membrane stresses in the belt. The anticlastic configuration of the belt is also taken into consideration. The commonly known simplified approximate analysis of the pressure, as well as the results of a more elaborated theory, are presented. Also given in the paper are the description and evaluation of several experimental stress analysis methods that can be used to solve the problem. Two– and three–dimensional photoelasticity, thickness measurements and electrical strain gauges were found to be the most practical approaches. The correlation of results obtained, using the theories and the experimental methods, is discussed. It is estimated that the peak contact pressure is 3–5 times that computed using the plane stress assumption. Results obtained will also have application in the design of wire–ropes or cables transmitting forces to sheaves or drums.

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Section: Rubber Beltmentioning

confidence: 97%

State of stress and strain in a rectangular belt pulled over a cylindrical pulley

Durelli

Buitrago

1973

Strain

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“…Heller 2 developed an equivalent expression to the Eytelweins formula which shows a diameter ratio dependence. The most significant difference between the Eytelwein and the Heller models is that the former only considers the axial forces in the rope, whereas the latter, besides considering the axial forces, also considers radial shear forces of the rope.…”

Section: Theorymentioning

confidence: 99%

“… Critical imbalance ratio, q c , versus diameters ratio, D / d , according to Eytelwein 6 and Heller 2 …”

Section: Theorymentioning

confidence: 99%

“…It basically consists of what in the elevator sector is described as 2:1 hoisting suspension. Two variable mass counterweights (1,2) are used, in order to prescribe an average rope tension as well as an imbalance ratio between both ends of the rope. Note that the selected suspension scheme provides a gain of two in the ratio between the stroke length of the rope and the stroke length of the counterweights, so that a l s length of counterweight stroke involves 2l s length of rope running the sheave.…”

Section: Testing Frame Descriptionmentioning

confidence: 99%

“…However, the reduction of the ratio between sheave and rope diameter, D / d , beyond a determined value may entail, on one hand, a drastic reduction of rope life and on the other, a reduction of the adherence capacity of the hoisting drive (see Heller 2 and Nabijou 3 ) and therefore of safeguard level in the elevator. Under these circumstances, the sector is demanding a more precise and accurate comprehension about the mechanical interaction between rope and traction drive in order to combine a more reduced traction sheave diameter design with enough safeguard level.…”

mentioning

confidence: 99%

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