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Power Transmission and Gearing Systems
Published in Wei Tong, Mechanical Design and Manufacturing of Electric Motors, 2022
Belts and cables are flexible power transmission elements that are used to transmit power or motion (linear or rotary) over relatively long distances. Their elastic nature enables them to pass over pulleys typically with a high degree of efficiency. The belt and cable drives provide flexibility in the positioning of the motor relative to the load. By changing the diameters of the driving pulley, which is attached to a source of mechanical power (e.g., a motor), and the driven pulley, which is attached to a driven load machine, the speed of the driven machine can be either decreased or increased. Because of the flexibility, the belt and cable drives have an inherent advantage to absorb amounts of shock and vibration. They can also accommodate some degree of misalignment between the transmitting shafts. However, since the power transmission with a belt or cable relies on friction between the belt or cable and pulleys, the belt or cable (excluding positive drives such as toothed synchronous belts running over toothed pulleys) is often subject to slip and creep. Thus, it can result in a decrease in the angular velocity of the driven machine and, in turn, a decrease in transmitted power. Furthermore, due to slippage of the belt, the belt drive helps protect the machinery from overload and jam. However, slippage may cause belts to run hot and age prematurely, leading to enormous wear of belts and pulleys.
Key Factors in Mechanical Power Transmission Failure
Published in Randy Riddell, Practical Root Cause Failure Analysis, 2022
Belt drives can have other characteristics that can be advantageous, such as they are lubricant free, absorb shock loads, have a visual warning of failure, are low cost, and are easy to install. There can be many types of belt drives used on industrial equipment, but the V-belt and synchronous (timing) belt are the most common. V-belts transmit power by friction while synchronous belts transmit power by teeth engagement.
Setting Outside Air, Checking Economizer Operation, And Changing Fan Speed and Drive Components
Published in Samuel C. Sugarman, Testing and Balancing HVAC Air and Water Systems, 2020
Belts shouldn’t be too tight or too loose. Slack belts will squeal on start-up, and they’ll wear out quicker and deliver less power. Belts with excessive tension will also make belts fail earlier and can cause excessive wear on shaft bearings and possible overload of the motor and drive. The correct operating tension is the lowest tension at which the belts will perform without slipping under peak load conditions. To install belts: Loosen and slide the motor forward.Put the belts on the sheaves and move the motor back to adjust the belts for proper tension.Secure the motor.
An intelligent belt wear fault diagnosis method based on deep learning
Published in International Journal of Coal Preparation and Utilization, 2023
Bingjun Wang, Dongyang Dou, Ning Shen
A belt conveyor is a commonly used continuous conveying equipment (He, Pang, and Lodewijks 2017; He et al. 2018) that is highly efficient, has a large conveying capacity and simple construction, and requires little maintenance. It is widely used for material transportation in thermal power plant, mining and coal preparation systems. However, a belt conveyor is subject to frequent failures. Belt slippage, belt wear, tearing, deviation, foreign body impacts, etc. often cause accidents. Belt wear and belt tearing, particularly, can cause serious hazards. In recent years, research has focused on longitudinal belt tearing (Xue 2012).
Ultimate pit limit determination for semi mobile in-pit crushing and conveying system: a case study
Published in International Journal of Mining, Reclamation and Environment, 2020
E. Hay, M. Nehring, P. Knights, M.S. Kizil
The use of conveyors as the major haulage method requires the use of one of five possible pit exit strategies. These are discussed in the Mine Planning and Design section of this paper. There are five main types of conveyor belts used in bulk material movement: belt conveyors, pouch conveyors, pipe conveyors, piggy back conveyors and high angle conveyors.
Development of a single-wheeled inverted pendulum robot capable of climbing stairs
Published in Advanced Robotics, 2020
A. A. Wardana, T. Takaki, M. Jiang, I. Ishii
Figure 9 shows the composition diagram of the proposed driving mechanism. Arms #1 and #2 are attached on shafts #1 and #2, respectively. Pulley #1 is attached to the wheel, and they are both mounted on the wheel shaft. The belt is used to transmit the power from pulley #1 to pulley #2. All shafts are mounted on the frame of body #1.