Basic Technology

What are Belt Drives? Advantages and Disadvantages of Belt Drives

len Alfred Ajibola - 09th August, 2019 @ 2:42 PM

Topics in Basic Technology

Definitions of technology and their explanations Examples of technology Forms of technology explained with their differences Types of chain drive Types of belt drive Types of Ceramics Advantages and Disadvantages of Chain Drives Len Academy Questions for Basic Technology JSS3, 2nd Term Len Academy Basic Technology Questions, JSS3 Belt and Pulley Drives: Types of belt in belt drives Refrigerator as an electromechanical device, its parts and operations What is chain drive? Classification of chain drive What are Belt Drives? Advantages and Disadvantages of Belt Drives Type of Lines in Technical Drawings Len Academy questions for Basic Technology, JSS2, 2nd Term Len Academy questions for Basic Technology JSS2, 2nd Term, Part 2 What is Maintenance? Types of Maintenance Hardwood and Softwood - Characteristics and Examples What are Ceramics? Characteristics of Ceramics


Academic Questions in Basic Technology

Please click here to see all Questions and Answers

The _____ functions to remove excess heat from the refrigerator.

  • A. Evaporator

  • B. Compressor

  • C. Condenser

  • D. Expansion Valve

  • E. Thermostat

  • F. Defrost System

A fluid or gas that runs through the compartments of a refrigerator is termed _____.

  • A. Water vapor

  • B. Liquid vapor

  • C. Frost

  • D. Refrigerant

  • E. Compressed water

  • F. Evaporated water

Current flows through a path called _____.

  • A. Electricity

  • B. Electric Route

  • C. Electrolysis

  • D. Transformer

  • E. High Tension

  • F. Electric Circuit

Googles are safety wears.

  • A. True

  • B. False

Which of the following is false concerning advanced ceramics?

  • A. They can be made from metallic oxides

  • B. They are very hard and durable

  • C. They are corrosion resistant

  • D. They are fired in the presence of oxygen

  • E. They are fired at a very high temperature of about 1700oC

  • F. They can be made from non-oxides such as carbides and borides

A thin continuous line is used for representing the followings except _____.

  • A. Intersections

  • B. Hatching lines

  • C. Long breaks

  • D. Diagonal line used to state plane surfaces

  • E. Leader lines

  • F. Back section lines

Inverted toothed chain drive - Len Academy

With regards to chain drives, the diagram above is a/an _____ chain.

  • A. Roller

  • B. Silent

  • C. Leaf

  • D. Flat-top

  • E. Detachable

  • F. Acceleration

A type of chain drive commonly used in bicycles is the _____ chain.

  • A. Roller

  • B. Silent

  • C. Leaf

  • D. Flat-top

  • E. Detachable

  • F. Acceleration



What are Belt Drives?

Belt drives are one of the drive mechanisms or transmissions employed in machines to bring about mechanical movement via power transmission.

It is important to understand that the most ideal and simplest form of transmitting mechanical power is via the rotational motion; and the belt drive proves to be very useful here.

You can read on the concept of motion here.


The concept of belt drive is employed in the working mechanisms of numerous machines. As an instance, a pepper grinder uses a drive (in the form of a belt) to propel forward its shaft.

Similarly, a sewing machine utilizes a belt (as its drive); and it can be mechanically moved via the 'foot actions' of the tailor.

Please read on the concept of belt and pulley drives here.


Below is an image showing a belt drive connecting two pulley systems:

Belt Drive - Len Academy


From the diagram, we can see that the belt drive requires a belt as its mechanism for mechanical power transmission.


Apart from belt drives, Other methods of mechanical power transmission includes:

  • Chain Drives

  • Gear Drives

Please read on chain drives here.


In the drive system, the machines are driven by rotational motion through its shaft to the other parts around it.

The driving pulley of the machine is termed the driver system while that which is driven is termed the driven system.


Understand that a pulley system in this instance refers to a wheel or sets of wheel over which a belt or chain is attached in order to create a movement or motion.

Please read more on the types of belt drives in pulley system here.


The pulley systems utilized in various machines have shown to be very important in making work much easier; be it connected via the belt drive, chain drive or gear drive respectively.


Below are the advantages and disadvantage of belt drives.

 

Advantages of Belt Drives

  1. They are economical.
  2. They are great shock absorbers.
  3. They don’t usually generate noise.
    Please read on pollution and waste management system here.
  4. They have a high efficiency rate (up to 98% efficiency rate).
  5. They are excellent in transmitting power between widely spaced shafts.
  6. The shafts do not need to be parallel to one another.
  7. They show you visual signs when they begin to fail.
  8. They don’t requiring oiling or lubrication.

 

Disadvantages of Belt Drives

  1. They deteriorate when exposed to chemicals.
    Please read on acids here.
  2. They effectively operate only at a temperature of about -35oC – 38oC.
  3. Once damaged, they can’t be repaired.
  4. They build up heat.
  5. Belt drives can occupy larger space in the machine.
  6. The slipping of belt occurs; thus disrupting speed.

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Amazing facts in Basic Technology

Rubber bands - Len Academy

Rubber bands last longer when refrigerated

Lighter was invented before matches

Johann Wolfgang Dobereiner was credited with the invention of lighter in 1826 while the match was made 3 years later

Volkswagen group of companies own some of the top cars of the world. These are Audi, Bentley, Bugatti, Ducati, Lamborghini and Porsche


Notable points in Basic Technology

Arrowhead Lines - Len Academy

Arrowhead lines are lines with pointed edges at one or both ends. The pointed edges are in the form of an arrow.

Arrowhead lines are used:

  • At the end of dimensional lines.

  • As measurement lines.

Please read more on types of line here.

A thin continuous line could be a straight or curved line. However, the main point to remember is this: 'it is a tiny line with no dot or dashes within it'.

_______________________

A thin continuous line is used for representing the followings:

  • Projection lines

  • Hatching lines

  • Construction lines

  • Short center lines

  • Measurement lines

  • Diagonal lines used to state plane surfaces

  • Intersections

  • Leader lines

  • Backside section lines

Any action that involves the servicing, checking, replacing and repairing of an equipment, object or device is termed maintenance.

Maintenance has two main goals. These are:

  1. To prevent a breakdown

  2. To repair the breakdown

 

Below are the types of maintenance:

  • Preventive maintenance

  • Corrective maintenance

  • Predictive maintenance

  • Periodic maintenance

  • Reinforcement

  • Overhaul

Please read more on maintenance here.

 

Softwoods are often derived from coniferous trees, that is: trees with needle-like leaves, and whose seeds are covered in cones.

Below are some characteristics of softwood:

  • Most softwood have lower densities than hardwood (weighs lower).

  • In terms of price, they are often less expensive than hardwood.

  • Their growth rate is faster than hardwood.

  • Most softwood do not shed their needle-like leaves during the year. However, the softwood 'larch' and 'cypress' are exceptions.

  • They are less fire resistant.

Please read on hardwood and softwood here

The diagram below shows the various types of line in technical drawing, their description and general application:

Type of Lines - Len Academy

Please read more on the types of line in technical drawing here