Planetary Gear

PLANETARY GEAR

AIM

Our aim is to design planetary gear mechanism in Solidworks and to conduct motion analysis in different conditions and to evaluvate the result of angular velocity.

GIVEN DATA

Ring Gear
Module = 2.5
Number of teeth = 46
Sun Gear
Number of teeth = 14
Input Speed of the Gear = 200 rpm.
Number of planet gears = 4

PLANETARY GEAR SYSTEM

It contains a sun gear, a set of planet gear and finally a ring gear. The planet gears are supported by a carrier. The sun gear is situated at the centre of the system. Around the sun gears, the planets gears are placed. In this particular challenge, there are 4 planet gears. The ring gear are situated on the outer. This is the basics of the PLANETARY GEAR MECHANISM.

CALCULATIONS

Let R be no. of teeth of ring gear
Let P be no. of teeth of planet gear
Let S be no. of teeth of sun gear

then,
R=(2*P)+S
substituting R=46 and S=14, we obtain P=16

PITCH CIRCLE DIAMETER of planet gear = NO. OF TEETH of planet gear * MODULE

PITCH CIRCLE DIAMETER of planet gear = 16*2.5= 40

similarly,
PITCH CIRCLE DIAMETER of sun gear = 35
PITCH CIRCLE DIAMETER of ring gear = 115

LINKS

ASSEMBLY AND PARTS

https://drive.google.com/drive/folders/1P2kVjG1g16meRmnzKKCwkHMbnSHOPWR9?usp=sharing
ASSEMBLY

CARRIER

SIMULATION
The creation of the model starts with designing spur gear(planet and sun gear) and internal gear (ring gear). We have to provide them with the details we obtained from the above calculations.
Then we should start designing the carrier with correct shaft diameter as that of planet gear and so create a sketch with the correct pitch circle dia
Then, in the assembly we have to align/mate the gears with respect to the carrier.
After mating correctly, we can observe the movement of the gears.
In Motion analysis, we have to do the following

The motor must have 200rpm.
the we have to create the lots and analyse the results.

PLOTS
Output1

Output2

Output3

CONCLUSION
It is observed that the angular velocity is the highest in case of sun gear is fixed and ring gear is given 200rpm and output is obtained at the carrier. It is also noted that angular velocity of carrier can be varied by differnt case. This denotes that wide appilcations of planetary gear system. The next important finding is that, there is a situation of rolling happening in case oF sun gear 200rpm and ring gear is fixed. Also sliding is noted when carrier is fixed and sun gear is at 200rpm.