Telecurso 2000 - Manutenção - 25 Variadores e redutores de velocidade e manutenção de engrenagens

Summary

This educational video script introduces viewers to the importance of preventive maintenance in mechanical equipment. It covers the functions and maintenance of speed variators and gear reducers, as well as the signs of gear defects and how to assemble and disassemble gears in mechanical sets. The script emphasizes proper lubrication, alignment, and periodic inspections to ensure equipment efficiency and longevity, providing a comprehensive guide for students and professionals in mechanical maintenance.

Takeaways

• 😀 The video is a professional development course module, specifically Teleaula number 25, focused on equipment maintenance.
• 🔧 The script covers preventive maintenance of equipment, starting with a practical demonstration of the process.
• 📚 Today's lesson introduces and explains the function and maintenance of speed variators, which are crucial for smooth changes in machine speed.
• ⚙️ The video discusses two main types of speed variators: belt transmission and friction wheel, each with its own method of operation.
• 👷‍♂️ Maintenance of speed variators includes proper care of elements like bearings and shafts, as well as overall system maintenance like alignment and lubrication.
• 🔄 The reducer is another key component explained, which is used to decrease machine speed, and the script details its maintenance process.
• 🦈 Understanding the correct disassembly and assembly of gear systems is vital, starting from the highest rotation axis and ending with the lowest.
• 🛠️ Gear maintenance involves avoiding sudden load changes, proper lubrication to prevent dry operation, and using the correct amount and type of oil.
• 🔍 The script identifies common gear defects such as pitting, scoring, and wear due to misalignment or overload, and the importance of early detection through symptoms.
• 🔨 During gear assembly and disassembly, it's important to avoid using a hammer and to use soft metal tools like a copper punch to prevent damage.
• 📈 The video concludes with the importance of monitoring the equipment during the first 50 hours of operation to ensure proper gear break-in and function.

Q & A

What is the main topic of the Teleaula number 25?

The main topic of Teleaula number 25 is the preventive maintenance of equipment, focusing on speed variators, speed reducers, and gears.

Why is preventive maintenance important for equipment?

Preventive maintenance is important to prevent equipment from making strange noises, potential defects, and to ensure smooth and efficient operation.

What are the two main types of speed variators mentioned in the script?

The two main types of speed variators mentioned are transmission by belt and friction wheel variators.

How does a belt transmission speed variator change rotation?

A belt transmission speed variator changes rotation by varying the diameter of contact between the belt and the pulleys.

What is the function of a speed variator in a machine?

The function of a speed variator is to allow variation in the speed of the machine's other elements without impacts, smoothly and automatically adapting to each working condition.

What are the key maintenance considerations for speed variators?

Key maintenance considerations for speed variators include caring for each element such as bearings and shafts, proper alignment and leveling, correct lubrication, and periodic inspections.

What is the purpose of a speed reducer in a machine?

A speed reducer serves to reduce the machine's speed, typically using a set of gears or a worm gear set.

What should be done when disassembling a speed reducer and gears?

When disassembling a speed reducer and gears, start with the highest rotation shaft and end with the lowest. Replace shafts and pins together, and ensure that conical crowns and pins are replaced in pairs.

What are some common symptoms of gear defects?

Common symptoms of gear defects include noise, tooth wear, scoring, pitting, and backlash.

How should gears be handled during assembly and disassembly to ensure optimal performance?

Gears should be handled with care, avoiding the use of hammers, and using soft metal tug tools. Proper lubrication should be applied during assembly, and the equipment should be monitored during the first 50 hours of operation.

What is the significance of understanding the symptoms of gear defects as mentioned in the script?

Understanding the symptoms of gear defects is crucial for early detection and prevention of corrective maintenance, which is better than preventive maintenance.