Query: belt conveyor pulley shell design

title: A finite element analysis for the design of a conveyor pulley shell
abstract: A finite element analysis of the cylindrical shell of a conveyor pulley is carried out. Deformations and stresses in the shell are calculated. The load is expanded into a Fourier series. The results obtained by the analysis are found to be in good agreement with the analytical and experimental results obtained by Lange. A parametric study is made, varying the wrap angle and belt tension. This approach is useful in the design of a conveyor pulley shell with improved accuracy.

title: Design of Belt Conveyor Pulley Drums
abstract: High performance personal computers allow the use of computationally intensive algorithms to be used as an alternative to classical pulley design techniques. These algorithms offer increased accuracy for stress and stiffness predictions of pulley drums and profiled end discs. A method for designing pulley drums based on the technique developed by Lange is presented. Lange's shell solution has been extended to provide more accurate predictions. The predictions are in close agreement to a finite element solution.

title: Integral analysis of conveyor pulley using finite element method
abstract: Pulleys are functionally critical items in belt conveyors. Earlier researchers have mostly analyzed the pulley in parts rather than as an integral structure. Since the stresses and deflections of its various parts are inter related, an integral analysis is mandatory for reliable pulley design. A finite element software has been developed for the analysis of pulleys utilizing a 3 noded thick conical shell element and a triangular ring element. This work considers all the well known assuctmptions on load variations along the pulley face width and around its periphery. A semi analytical approach using Fourier analysis has been adopted. To validate the software, comparison has been carried out with published experimental and theoretical investigations. A few parametric studies are also reported to elucidate the mutual inter dependence of stresses in the pulley components.

title: Studies on some Aspects of Conveyor Drive Pulley Design
abstract: The present paper brings out the inadequacies of the standards and codes used for conveyor drive pulley design. Some of the aspects of conveyor drive pulley design not covered in standards and codes have been evaluated in the light of the shaft, type of diaphragm and shell with an integrated approach. The different design approaches like classical mechanics approach, finite element method and modified transfer matrix have been discussed highlighting their pros and cons. Keywordsconveyor drive pulley design, integrated approach, classical mechanics approach, finite element method and modified transfer matrix. I. CHALLENGES IN CONVEYOR PULLEY DESIGN Present day conveyors use drum type welded steel construction, comprising of a shaft, hubs, diaphragms (also termed as discs or webs) and shell or rim (to support the belt width) The selection of conveyor drive pulley is based on tension range of belt transmission  Usually, for the lower tension range up to 1300 N/cm of belt width, "conventional or standard construction" pulleys (with welded hub fig.1) are used. For the tension range of 1300 to 4500 N/cm of belt width, "Engineered Class" pulleys (with welded fig.1 or integral hub fig.2) are used and for the tension range of 4500 to 17,500+ N/cm of belt width, "T section" pulleys (with integral/ profiled hub fig. 2) are used.  Turbo diaphram/T section/taper profile diaphragm Most of the general conveying applications, fall within the range of lower tension ratings. The welded hub and diaphragm type pulley design (conventional) is chosen for lower tension ratings, due to the relative ease of manufacture. However, for higher tension ratings, the economic design is achieved through other types of constructions. Conveyor pulley has been recognized as a critical component of conveyor, failure of which, can lead to extensive damage and down time and hence conveyor pulley must be designed carefully for the successful operation of conveyors. The conventional conveyor drive pulley design is based on conveyor belt tensions of tight slack side and self weight under steady state conditions. Different component parts of the drive pulley like shell, diaphragm, hub and shaft are subjected to bending stresses. Thus, strength and rigidity are the main criterion of design. General practice in design is to use classical mechanics approach for strength and rigidity and to use higher factor of safety ~3 to 4) Design is checked for permissible deflection (rigidity) and bending stresses. A conveyor pulley is a rotating device under dynamic, asymmetric lateral load, for every revolution all its parts go through a complete reversal of stresses caused due the load. This leads to fatigue in the components. Hence, when designing a pulley, the problem is to provide sufficient strength in the shell, diaphragms, hubs and shaft to prevent failures due to high stresses, and, at the same time, provide just sufficient flexibility in the overall structure so that it neither fails due to fatigue, nor wobbles on the shaft. It 13 14 May 2011 B.V.M. Engineering College, V.V.Nagar,Gujarat,India National Conference on Recent Trends in Engineering Technology

title: Buckling load and deformations of a cylindrical shell under non uniform belt tensions
abstract: The stability of a cylindrical shell which is used in a conveyor power pulley subjected to exponential belt tensions is analysed. A set of differential equations for buckling of a cylindrical shell under non uniform external pressure has been solved. The formulas and results, deduced for the first time, may be readily applied to determine the critical load and deformations of conveyor power pulley shells for optimum design or other applications.

title: Design of a 10T Flake Pile Roller Stand
abstract: This article provides a summary of the design and operating parameters for a 10T Flake Pile Roller Stand. The 10T Flake Pile Roller Stand is designed to reduce the force required to install conveyor belt that has been pre spliced and assembled into a flake pile. The performance requirements of the 10T Flake Pile Roller Stand were initially determined through Excel spreadsheet calculations. Finite element analysis was used to determine the structural stresses induced by the belt tension during operation within the pulley shell, the pulley shaft and the stand. The maximum belt tension was 10 tonnes. Australian Standard AS3990 Mechanical Equipment Steelwork has been utilized for determining the suitability of the design. The design meets the requirements of the standard for the proposed belt tension.

title: Development of a technique for computer simulation of the stress state of the drive drum shell of a belt conveyor to optimize its design parameters
abstract: The paper considers the method of computer simulation of the stress strain state of the drive drum shell in the NASTRAN integrated environment. Due to the complexity of determining stresses and deformations in the drum sections by the analytical method, it is proposed to solve this important problem using the numerical finite element method. At the preliminary stage of computer modeling, a mechanical design scheme was developed, including a variable pressure that changes depending on the angle of rotation of the drum, the deterministic relations describing the variable force factors are based on the Euler ratio. It is also proposed to take into account the pressure from the variable friction force, which depends on the changing coefficient of adhesion of the belt to the drum. As a result of the computer calculation, the equivalent Mises stresses of 65 MPa were determined, the safety factor was 4.2 and the components of the tangential stresses were determined using the stress tensor marker, the shear stress reached the level t=16 MPa for fabric tape and t=3.14 MPa for rubber tape. According to the results of the calculation, the dependence of the tangential stresses on the angle of rotation of the drum was constructed. A diagram of the change in the component of tangential stresses along the forming shell of the drum was constructed. Analysis of stress strain state allowed us to determine the factor of safety of the drum shell. Based on the analysis of equivalent stresses, it is proposed to further calculate the durability of the drum using the method of long term fatigue. The computer calculation of shear stresses in the component allows choosing the rational parameters of the lining, based on such indicators as peel strength and break, as well as determining the angle 61deg of the slab lining required to improve the reliability and traction ability of the pipeline.

title: DESIGN OF BELT CONVEYOR TO INCREASE THE EFFICIENCY OF FINISHING GOOD PRODUCT TRANSFER FROM WAREHOUSE 1 TO WAREHOUSE 2 IN PT XY
abstract: This research aims to find out how much capacity that could have produced a conveyor according to the rpm speed of the motor and conveyor dimensions as well as to determine the selection of the components that are used as system power supplier. This research was carried out based on the calculation of the design of conveyor design guide book and catalogue containing components of belt conveyor. Results of the design is to be used as a guide for designing a conveyor to transport box containing intravenous fluids in PT XY. After the design resulted in two conveyors with 22.5 m long dimension, 40 cm wide belt and 0.5 m s speed with inclination angle of 30 0 and 25 0 The conveyor has a carrying capacity of 300 boxes hour (4.3 ton jam) For power supply systems used 1.5 kw AC motor, WPX 80 type gearbox reducer ratio 1:10 s d 1:60, S 400/4 type belt, drive pulley 500 mm, roller idler 89 mm, take up type screws, transition roller chain number 40, number of teeth Z 1 21 and Z 2 =50, sprocket 90.5 mm and 209.5 mm, SAE type 10 oil (43 cSt, 200 SUS at 37.8 0 C)

title: Design Modeling of Special Purpose Equipment for Shell diaphragm Welding in Conveyor Pulley
abstract: At the present time in many material handling industries, need and capacity of conveying equipments are increasing rapidly. Conveyor pulleys have been recognized as a most necessary component of the conveyor system. As a result of these demand of conveyor pulley increasing day by day. Various types of pulleys are used for conveying systems. Here a focus is on the high tension pulleys where the use of custom made engineered welded steel pulley is dictated due to its higher capacity and ease of manufacturing. Requirement of various sizes conveyor pulleys are there as a result of various size of conveying systems are to be designed. It is now compulsory for the conveyor pulley manufacturer to increase the production rate. To be specific industries want a special purpose machine which in turn useful according to various diameter and various length of pulleys. Even they have to supply it on time with less cost to fulfill the customer needs. So an attempt is made to design special purpose equipments for Shell Diaphragm Welding in Conveyor Pulley which is useful to increase the productivity and quality of the product.

title: Fatigue Analysis of Bend Pulley of Large Inclination Belt Conveyor and Optimization Design
abstract: With the increase of mining depth of coal seam, the difficulty of exploitation of mine increased. The demand of large inclination belt conveyor becomes more and more. The drum conditions of large inclination belt conveyor is very complicated, So when design the drum, the influence of alternating stress and load to drum fatigue life should be considered. In this paper, the analysis of fatigue life of bend pulley was completed by means of the finite element software of ANSYS and FE SAFE, and by changing the parameters including the thickness of drum cylinder and hub and the spacing of hubs. Then repeated modeling analysis, the discipline between drum fatigue life and drum parameters was gotten, at last, the optimal design was exercised to improve the fatigue life of drum.