The planetary gear set also known as the epicyclic gear train, is one of the most important and interesting inventions in engineering. They are great speed variation mechanisms and are often used in automobiles as a vital part of automatic transmissions. Let's explore the secrets of the planetary gear set. A planetary year that has four main parts The sun protection equipment planet gears ring gear. and career.
You can see that it sometimes rotates quickly and sometimes slowly. and sometimes, even in reverse. But how does this happen? You will be able to predict the motion of this year completely, if you understand one simple fact. when two gears are moving, they should have the same speed at the interface. This means that the speed of your A gear should be the same as your B gear at their meeting point. As demonstrated, that is an impossible condition. apply this fact to planetary gear sets, and you will be able to predict how speed variation is achieved.
We assume that the rain gear is held stationary, and we rotate the sun every year. Think of what happens to the planet's gears. At point a, the planet should have a certain speed, and at point b, the speed should be zero as the ring gear is stationary. However, how are both of these conditions possible at the same time? There is only one way the planet's year should spin as well as turn.
As the turning produces unit direction velocities, the spinning will produce velocities in opposite directions at the top and bottom points, as shown. the top, the spinning and turning velocities are in opposite directions. So the velocity of point b is zero at the bottom. They get edited. In short, the planet's years are forced to turn in order to satisfy the condition of velocity as the carrier is attached to the planet gear. He will turn along with the planet. Now, what happens when the sun gear is held stationary and the rain gear is rotated? This is the exact opposite of the previous case at the inner point of the planet's gear. The velocity should be zero, and the outer point should have the speed of the ring gear. In this case, the planetary spin will reverse in order to satisfy these conditions.
However, this case has one more difference: the speed of point b will be higher than the speed of point a in the previous case. This is obvious as the range of radius is higher. In turn, this will make the planet's year spin at a higher speed. Thus, the career will turn at a higher speed. Let's now explore this reverse mechanism of planet gears. For this, what you have to do is just arrest the motion of the career.
This means that the planet's gears are not allowed to turn, and can only spin. This spin will be the opposite to the rotation of the sun on Sunday. This spitting planet this year will make the ringer rotate in the same direction. In short, the direction of rotation of the ring gear will be the opposite to that of the sun gear. Thus, we will get the reverse. Here you can note that in order to achieve different speeds, the input must be given to different parts of the planetary gear. As said, this is practically impossible in practise. In an automatic transmission, three planetary gear sets are connected in series with a coaxial shaft. It is important to understand how this arrangement effectively transfers the input rotation to different parts of the planetary gear.
You must be logged in to post a comment.