Dynamic balancing without static balancing

In summary, static balancing is when the center of gravity is in the axis of rotation, while dynamic balancing is when the central principal axis of inertia is parallel and coincident with the axis of rotation. It is not possible to have dynamic balancing without first achieving static balancing, as the principal axes of inertia must pass through the center of mass. This is important for ensuring a smooth and stable rotation without any wobbling or vibrations.
  • #1
hazar
4
0
static balancing is when the center of gravity is in the axis of rotation.

dynamic balancing is when the central principal axis of inertia is parallel and coincident with the axis of rotation.

my question is, even if its theoretically, can you have dynamic balancing without static balancing?

If you have the center of gravity outside the axis of rotation but still have the central principal axis of rotation on and parallel with the axis of rotation, do you not have dynamic without static balancing?
 
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  • #2
From experience with car tires, it seems that dynamic balancing is always better. If you statically balance the tires then at some certain speeds you'll get a wobbly feeling due to hitting the resonant frequency.
 
  • #3
jedishrfu said:
From experience with car tires, it seems that dynamic balancing is always better. If you statically balance the tires then at some certain speeds you'll get a wobbly feeling due to hitting the resonant frequency.

Thanks but still doesn't answer my question in a way.

Can you have dynamic without static
 
  • #4
The principal axes of inertia pass through the center of mass, by definition.

So the answer to your original question is no, you can't have the principal axis along the axis of rotation but the center of mass somewhere else.
 

1. What is dynamic balancing without static balancing?

Dynamic balancing without static balancing is a method used to balance rotating machinery, such as motors or turbines, while they are in operation. It involves making adjustments to the rotating parts to minimize vibrations and improve overall performance.

2. How is dynamic balancing without static balancing different from traditional balancing methods?

In traditional balancing methods, the rotating machinery is first stopped and then balanced. In dynamic balancing without static balancing, the machinery is balanced while it is still running, allowing for more accurate balancing and preventing any production downtime.

3. What are the benefits of dynamic balancing without static balancing?

The main benefit of dynamic balancing without static balancing is that it can be done while the machinery is still in operation, saving time and money. It also results in more accurate balancing and can improve the performance and lifespan of the machinery.

4. What types of machinery can benefit from dynamic balancing without static balancing?

Any rotating machinery that experiences vibrations, such as motors, turbines, or fans, can benefit from dynamic balancing without static balancing. This method is particularly useful for high-speed machinery or machinery that cannot be easily stopped for balancing.

5. Are there any limitations or drawbacks to dynamic balancing without static balancing?

One limitation of dynamic balancing without static balancing is that it may not be suitable for all types of machinery. Additionally, it requires specialized equipment and expertise, which may not be readily available. There is also a risk of injury if proper safety measures are not taken during the balancing process.

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