Axial Play & End Play in Rotating Assemblies

  • Thread starter droptchevy
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In summary, the conversation discusses the need for information on axial play and end play in a rotating assembly, specifically in a centrifugal chiller. The speaker mentions that the end play requirements are dependent on the bearing configuration and can vary in different designs. They suggest consulting with the supplier of the bearings for more specific information.
  • #1
droptchevy
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I was looking for information on axial play on a rotating assembly.More specifically a centrifugal chiller although any information would be good

I need information on end play, and why it is needed, why this axial force is created,etc.

Any help or links is appreciated
 
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  • #2
The end play requirements are usually dictated by the bearing configuration you have. The max endplay will be related to the minimum preload that your bearings need to stay "happy." It's tough to give any real general information because every situation is different. You need to examine what you can tolerate for every design. For example, I have different end play requirements when I have a centrifugal compressor design. The endplay has an effect on the tip and cover clearances which need to be kept at certain values.

If you really need a place to start, take a look at who supplied the bearings in a particular installation and ask them directly about the allowable end play/axial play.
 
  • #3
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Axial play and end play are important factors to consider in rotating assemblies, including those in centrifugal chillers. They refer to the amount of movement or displacement that a rotating component (such as a shaft or rotor) can experience along its axis.

Axial play is the amount of movement that a rotating component can experience in a linear direction along its axis. This can be caused by factors such as manufacturing tolerances, thermal expansion, and wear over time. In the case of a centrifugal chiller, axial play may occur in the compressor shaft as it rotates at high speeds.

End play, on the other hand, refers to the amount of movement that a rotating component can experience at the ends of its axis. This can be caused by factors such as bearing clearances, thermal expansion, and external forces acting on the assembly. In a centrifugal chiller, end play may occur in the compressor shaft due to thermal expansion or pressure differentials.

Both axial play and end play are important to consider in rotating assemblies because they can affect the performance and reliability of the equipment. Excessive axial play can cause vibration, noise, and premature wear on components, while insufficient end play can result in binding or seizing of the assembly.

To address these issues, manufacturers design rotating assemblies with specific tolerances for axial play and end play. This ensures that the assembly can operate smoothly and reliably within its intended parameters. In the case of a centrifugal chiller, the compressor shaft may have bearings with specific clearances to allow for a certain amount of axial and end play.

In summary, axial play and end play are crucial considerations in rotating assemblies, including those in centrifugal chillers. By understanding the causes and effects of these types of movement, manufacturers can design and maintain efficient and reliable equipment.
 

1. What is axial play in rotating assemblies?

Axial play refers to the amount of movement or play that occurs in the axial direction (parallel to the axis of rotation) of a rotating component. This can be measured by the distance the component can move back and forth along the axis.

2. Why is axial play important?

Axial play can affect the performance and longevity of a rotating assembly. Too much axial play can cause vibrations, noise, and premature wear and failure of the components. It is important to properly measure and control axial play to ensure optimal operation.

3. What is end play in rotating assemblies?

End play, also known as end float, refers to the movement or play that occurs in the direction perpendicular to the axis of rotation. This can be measured by the distance the component can move in this direction.

4. How is axial play and end play measured?

Axial play and end play can be measured using precision instruments such as dial indicators or feeler gauges. The component is typically moved in the direction of play and the distance is recorded.

5. How can axial play and end play be controlled?

Axial play and end play can be controlled by adjusting the components or using shims to achieve the desired amount of play. Proper maintenance and regular checks can also help to ensure that the play remains within acceptable limits.

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