Over View

Gear

Gears are toothed cylindrical wheels used for mechanical power transmission from one rotating shaft to another. Power transmission also done by belts, chains, hydraulic and electrical systems. If the distances of power transmission is large, belts and chains can be used. But when a compact, then the best option is gear drives. The gear drive is very efficient and competitive for transmission of power with high torque and high speed. The amount of torque transmitted through the gears depends on the number of teeth and the size of the gears. Higher the gear ratio, higher the torque An additional benefits of gear drives is quick reversibility.

Types of Gears

According to the tooth profiles.

·         Spur Gears

·         Helical Gears

·         Bevel Gears

·         Worm Gears

·         Spiral Gears

·         Rack and pinion

·         Planetary Gears (Epicyclic gearing)

Function of a Gear Box 

Gear box is to vary the speed of a machine depends on Torque.

Power is the function of speed and torque. In other words, power is product of torque and speed (P = TV) of the shaft. By varying the sizes of gears, the torque and speed of driven member can be changed.

Types of Gearbox

1.    Sliding mesh type gearbox

2.    Constant-mesh type gearbox

3.    Synchromesh gearbox

4.    Epicyclic (or) Planetary gearbox

Types of Gear Trains

1.    Simple Gear Train

2.    Compound Gear Train

3.    Reverted Gear Train

4.    Epicyclic Gear Train (or) Planetary gear trains

·         Simple epicyclic gear trains

·         Compound epicyclic gear trains

About me

  

I am being a Mechanical engineer with 40 years of experience in maintenance of production line and Power plant machines. During my services, I had come across many different kinds of problems and breakdowns which leads to partial or total shutdown of the plant. A suitable & safe method had to be adopted to fix the deficiency and put back the machine into operational. 

In my entire tenure, I had taken up many challenging tasks and successfully solved the issue. To expedite the maintenance, it is very much essential to understand the technology of machine. 

The idea of this website is to share my experience with young generation of Mechanical Engineers. 

Here is a moral story of an Old man's Experience.

A giant ship engine failed. The ship’s owners tried one expert after another, but none of them could figure but how to fix the engine.

Then they brought in an old man who had been fixing ships since he was a young. He carried a large bag of tools with him, and when he arrived, he immediately went to work. He inspected the engine very carefully, top to bottom.

Two of the ship’s owners were there, watching this man, hoping he would know what to do. After looking things over, the old man reached into his bag and pulled out a small hammer. He gently tapped something. Instantly, the engine lurched into life. He carefully put his hammer away. The engine was fixed!

A week later, the owners received a bill from the old man for ten thousand dollars.

“What?!” the owners exclaimed. “He hardly did anything!”

So they wrote the old man a note saying, “Please send us an itemized bill.

The man sent a bill that read:

Tapping with a hammer………………….. $ 2.00

Knowing where to tap…………………….. $ 9,998.00

Effort is important, but knowing where to make an effort makes all the difference!

Good Luck