Belts 1 Flashcards
Main advantage of belt drives?
Belt will act as a clutch and slip or fail before the equipment does.
Also cost less than chain drives
What are the three main types of belts?
V or wedge belt
Flat belt
Toothed / synchronous / timing
What is the component being turned by the belt refers to as?
Pulley
The v style belt uses what type of pulley?
Sheave
The toothed style belt uses what type of pulley?
Sprocket
The flat style belt uses what style pulley?
Drum style pulley.
Advantages of belt drives over close coupled, roller chain, and gear drives?
They are relatively economical to install and maintain
They are simple to design
They are easy to install
No lubrication is required
Wide variety of applications
Can adjust for any speed requirements
V belt drives are quiet and operate smoothly
Pulleys are less expensive then comparable chain sprockets
Long sheave / pull life
Belts act as a clutch to prevent machine failure
Advantage of flat belts?
They have flexibility and can go around corners
Disadvantage of flat belts?
Relies on high tension to keep belt in contact with pulley and high friction to keep it from slipping
Why must pulleys be crowned and often have flanges?
To keep belt centered and keep it from walking off.
Will smaller or larger sheave wear out faster?
Smaller
Is the slack side or tight side opposite of rotation?
Slack side
What are the two construction categories of v belts?
Envelope and raw edge
How do you know it’s envelope style v belt?
Tensile cord is not showing. And is protected from from elements. (Used outside)
How to you know it’s raw edge style v belt?
Tensile cord is showing. Not protected