Computing train value of planetary gear

In summary, planetary gear is a type of gear system that consists of a central gear (called the sun) surrounded by multiple smaller gears (called planets) that rotate around it. The train value of planetary gear can be computed by multiplying the gear ratio of each stage of the gear train, which is calculated by dividing the number of teeth on the driven gear by the number of teeth on the driving gear in each stage. The train value is affected by factors such as the number of stages, gear ratios, and efficiency of the gear system. The efficiency of a planetary gear system is determined by comparing input and output power, and can be affected by factors such as friction and lubrication. Planetary gear systems have various advantages, including high power density
  • #1
lucfuture
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Homework Equations


e=(product of number of driving teeth)/(product of number of driven teeth)

e=(n[itex]_{out}[/itex]-n[itex]_{arm}[/itex])/(n[itex]_{in}[/itex]-n[itex]_{arm}[/itex])


The Attempt at a Solution


e=(N[itex]_{p1}[/itex]/N[itex]_{s1}[/itex])*(N[itex]_{s2}[/itex]/N[itex]_{p2}[/itex])
e=1.25926

e should be 0.7941 however

From there out it seems pretty trivial. I just need to get the right e value.
 
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Problem statement
 

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1. What is planetary gear?

Planetary gear is a type of gear system that consists of a central gear (called the sun) surrounded by multiple smaller gears (called planets) that rotate around it. This system allows for a compact and efficient way of transferring power between two shafts at different speeds.

2. How do you compute the train value of planetary gear?

The train value of planetary gear can be computed by multiplying the gear ratio of each stage of the gear train. The gear ratio is calculated by dividing the number of teeth on the driven gear by the number of teeth on the driving gear in each stage.

3. What factors affect the train value of planetary gear?

The train value of planetary gear is affected by the number of stages in the gear train, the gear ratios of each stage, and the efficiency of the gear system. Other factors such as the size and quality of the gears can also have an impact on the train value.

4. How is the efficiency of a planetary gear system determined?

The efficiency of a planetary gear system is determined by comparing the input power to the output power. The efficiency can also be affected by friction, lubrication, and other factors that can cause energy loss in the system.

5. What are the advantages of using planetary gear?

Planetary gear systems have many advantages, including high power density, compact size, and low noise levels. They also have the ability to handle high torque loads and provide a wide range of gear ratios. Additionally, the gear system can be designed for specific applications, making it versatile for various industries.

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