What are the conditions to be satisfied to avoid interference?

What are the conditions to be satisfied to avoid interference?

To set up a stable and clear interference pattern, two conditions must be met: The sources of the waves must be coherent, which means they emit identical waves with a constant phase difference. The waves should be monochromatic – they should be of a single wavelength.

Which is the incorrect relationship of gears?

8. Which is the incorrect relationship of gears? Explanation: Module, m = D /T.

Which is the relationship of gears?

We use the word ratio to describe this constant relationship between two values. A gear ratio is the ratio of the number of rotations of a driver gear to the number of rotations of a driven gear. A colon is often used to show a gear ratio: gear ratio = rotations of a driver gear : rotations of a driven gear.

What is meant by contact ratio in gears?

Contact ratio is average number of gear teeth in contact with one another as the gears are in operation. Gear tooth profiles must be dimensioned in such a way that more than one pair of gears must be in contact with one another.

Which of the gears has the highest contact ratio?

High contact-ratio (HCR) gears are gears defined with a contact ratio greater than 2.0. Standard gears have a typical contact ratio of 1.2 to 1.6. In their most basic form, gears are designed to transmit power, and HCR gears perform especially well.

What is high contact ratio?

High contact ratio gears (HCRG) are generally referred as a spur gear mesh with a contact ratio between two and three. This means there are at least two tooth pairs in contact at all times during the gear mesh, whereas conventional low contact ratio gears (LCRG) alternate between one and two pairs in contact [1].

What is the minimum and maximum value of contact ratio in gear pair?

The contact ratio is also influenced by shaft and bearing deformations of even a few micrometers, since they affect the center distance between the gears. For that reason contact ratios should be greater than 1.2, because contact between gears must not be lost.

How can I make my gear stronger?

How to encourage bending strength

1. Use durable materials (Increase allowable bending stress at root)
2. Enlarge the gear size (For large module / wide tooth width)
3. Strengthen tooth profile (Decrease tooth profile factor) – Large pressure angle.
4. Increase contact ratio (Decrease load distribution factor)
5. Improve accuracy.

How do you know what gear ratio you have?

The gear ratio is calculated by dividing the output speed by the input speed (i= Ws/ We) or by dividing the number of teeth of the driving gear by the number of teeth of the driven gear (i= Ze/ Zs).