Friction Force of Rotating Shaft

In summary, the conversation discusses the analysis of forces on a vacuum roller brush and the determination of power and rpm's needed for an electric motor to rotate the shaft. It is mentioned that at any given time, there will be three contact points between the bristles and the carpet. The goal is to achieve a rotation of 5000 RPM, and the maximum friction that would be felt is questioned, assuming nylon bristles. The conversation also touches on the torque that would need to be applied to keep the shaft rotating while in contact with the carpet, with the caveat that the dimensions are flexible and need to be considered in the design. The formula of (frictional force) * (radius of shaft) is mentioned as a way to determine
  • #1
calypsoman4
1
0
I'm analysing the forces on a vacuum roller brush in an effort to determine the power and rpm's that will be required of an electric motor to rotate the shaft. At anyone time there will be three contact points with the bristles to the carpet. Assuming we want the roller brush around 5000 RPM, what is the maximum friction that would be felt? (assuming nylon bristles) How much Torque would need to be applied to shaft to keep it rotating when in contact with the carpet? (this is a design problem so all dimensions are up to me just having trouble on how to represent this situation.)
 
Engineering news on Phys.org
  • #2
well you know the torque put on the shaft y the bristles will be the (frictional force) * (radius of shaft). you know what the radius of the shaft is, but you have to somehow estimate the frictional force between the carped and the nylon bristles.
 

Related to Friction Force of Rotating Shaft

1. What is friction force of a rotating shaft?

The friction force of a rotating shaft is the resistance force that acts on a rotating shaft due to the contact between the shaft and the surface it rotates on. It is caused by the roughness and imperfections on the surface of the shaft and the surface it rotates on.

2. How is friction force of a rotating shaft calculated?

The friction force of a rotating shaft can be calculated using the formula F = μN, where F is the friction force, μ is the coefficient of friction, and N is the normal force acting on the shaft.

3. What factors affect the friction force of a rotating shaft?

The friction force of a rotating shaft is affected by several factors including the coefficient of friction, the normal force, the surface roughness of the shaft and the surface it rotates on, and the speed of rotation.

4. How can friction force of a rotating shaft be reduced?

To reduce the friction force of a rotating shaft, measures such as using lubricants, polishing the surfaces, and reducing the speed of rotation can be taken. Additionally, using bearings or other mechanisms to support the shaft and reduce contact with the surface can also decrease the friction force.

5. Why is understanding friction force of a rotating shaft important?

Understanding the friction force of a rotating shaft is important because it affects the performance and efficiency of rotating machinery. It also plays a crucial role in the design and maintenance of these machines to prevent excessive wear and damage caused by friction.

Similar threads

Torque calculations: Rotating vertical shaft
    • Mechanical Engineering
Replies
5
Views
3K
How to Measure Torque Required for motor to spin a rotating shaft?
    • Mechanical Engineering
Replies
3
Views
3K
Torque required to rotate a hollow cylinder containing chips
    • Mechanical Engineering
Replies
5
Views
2K
Bearing and Bushing design
    • Mechanical Engineering
Replies
5
Views
1K
Formula to calculate force as a function of angle
    • Mechanical Engineering
Replies
1
Views
1K
Calculating Rotational Forces: Understanding Motor Dynamics | Diagram Included
    • Mechanical Engineering
Replies
2
Views
826
Calculating Maximum Force for C1018 Steel Shaft
    • Mechanical Engineering
Replies
9
Views
3K
[Cam Design] Calculation of torque required by cam shaft
    • Mechanical Engineering
Replies
9
Views
26K
How to select a stepper motor and gear ratio?
    • Mechanical Engineering
Replies
2
Views
3K
How Do You Calculate Torque for a Rotating Shaft with Bearings?
    • Mechanical Engineering
Replies
7
Views
2K

Hot Threads

Recent Insights

Back
Top