Electric drive project 2 Design a conveyor drive control circuit ELECTRIC POWER UNIVERCITY DEPARTMENT OF CONTROL AND AUTOMATICS Electric drive project 2 Name of topic Design a conveyor drive control c.
OVERVIEW OF LOADS
The history of the conveyor belt
The history of conveyors dates back to the late 17th century, marking their importance in material transportation However, it was in 1795 that conveyor belts gained popularity for conveying bulk materials, initially used for moving grain sacks over short distances.
In the early days, conveyor systems featured a simple design with a flat wooden bed and a belt running through it, originally made of leather, cloth, or rubber This basic conveyor system was widely used for transporting bulky items from one location to another By the early 20th century, the applications of conveyor belts expanded significantly, showcasing their versatility in various industries.
Hymle Goddard was the first to receive a patent for roller conveyors in 1908. The conveyor roller conveyor businesses did not prosper A few years later, in
Since their introduction in 1919, conveyor belts have revolutionized automobile production and become essential for transporting heavy cargo in factories The 1920s saw significant advancements in conveyor technology, with their use expanding to coal mines where they efficiently transported coal over distances exceeding 8 kilometers Today, some of the longest conveyors operate in the western Sahara phosphate mines, stretching hundreds of kilometers A pivotal moment in conveyor history occurred during World War II with the introduction of synthetic materials, addressing the scarcity of natural resources like cotton and rubber.
In 1957, BF Goodrich Company patented the Mửbius strip conveyor, known today as the "Rotary Conveyor System." This innovative design features a half-twist, allowing for a longer lifespan as it exposes the full surface area to wear However, Mửbius strip belts are no longer produced, as modern belts are constructed from multiple layers of various materials, making them more durable without the need for twisting.
In 1970, Intralox, a Louisiana-based company, pioneered the patent for plastic modular belts, leading to the widespread adoption of synthetic conveyors across various industries As market demand grew, the use of diverse synthetic polymers and fabrics expanded in conveyor manufacturing Today, commonly utilized materials include cotton, fabric, EPDM, leather, neoprene, nylon, polyester, polyurethane, urethane, PVC, rubber, silicone, and steel.
Structure and operation principle of the conveyor belt
The shaped aluminum conveyor frame has gained popularity in the electronics and computer manufacturing sectors due to its aesthetic appeal, lightweight design, and high flexibility This innovative solution allows for easy structural modifications to meet specific production requirements, making it ideal for handling light to medium loads efficiently.
Stainless steel conveyor frame: Usually used in environments subject to dust and chemicals such as food processing, aerospace, pharmaceutical, chemical industries, bottling and canning
Conveyor frame Galvanized steel and powder coated steel: economic advantages and withstand all different loads Commonly used in the automotive and motorcycle industries, printing finishing and packaging
The shaped aluminum conveyor frame has gained popularity in the electronics and computer manufacturing sectors due to its aesthetic appeal, lightweight design, and high flexibility This innovative solution allows for easy structural modifications to meet varying production requirements, making it ideal for handling light to medium loads in modern assembly processes.
Stainless steel conveyor frame: Usually used in environments subject to dust and chemicals such as food processing, aerospace, pharmaceutical, chemical industries, bottling and canning
Conveyor frame Galvanized steel and powder coated steel: economic advantages and withstand all different loads Commonly used in the automotive and motorcycle industries, printing finishing and packaging
Belt conveyors are essential for transporting materials, and the choice of belt type depends on the load and product specifications For lighter loads, PVC or PU belts with a thickness of 1-5mm are commonly utilized In contrast, heavy-duty applications require robust rubber conveyor belts to ensure durability and efficiency.
+ Rollers pull tape in stainless steel, galvanized steel or aluminum There are
+ Roller support for upper and lower sides of stainless steel or galvanized steel, with diameters: ỉ25, ỉ32 and ỉ38.
+ Drive from engine to working shaft by chain transmission and belt.
Current conveyor motors often use two popular types:
Geared-box motors with power ranges from 25W to 200W.
- Separate motor and gearbox, power range is usually from 0.37KW to 2.5KW. Speed controller: Inverter, sensor, timer, sensor, PLC
+ Support belt: Usually made of stainless steel, galvanized steel or aluminum plate trauma.
+ The roller support ball bearings.
The conveyor drive system offers numerous advantages, including a simple and durable structure that efficiently transports materials over long distances in both horizontal and inclined directions This system ensures smooth operation and high productivity while maintaining low energy consumption.
Disadvantages of conveyor drive system:
+ There is a loss of transporting materials due to spillage on the transportation route, causing pollution and environmental pollution.
+ When transporting over long and not straight distances, expensive transfer stations are required.
+ Transport speed is not high, conveyor inclination is small (> Tu; however, the adjustments during transients are smaller.
When there are more current regulators and speed regulators, the feedback voltage follows the applied voltage more.
The current limiting step installed after the speed regulator has the effect of reducing the signal set for the current loop.
Through extensive research and the invaluable guidance of industry experts, particularly Mr Nguyen Duy Trung, I have gained a comprehensive understanding of conveyors in industrial systems, complemented by my own dedicated efforts in the field of automation and measurement.
Through my research on the topic, I have gained valuable knowledge that has significantly enhanced my understanding Nevertheless, time constraints have imposed limitations on the depth of my exploration.
Despite our best efforts, some shortcomings are unavoidable during this process I welcome constructive feedback from teachers to enhance my project further I would also like to express my gratitude to my mentors and teachers for their invaluable support in successfully completing my graduation project.