Eight common benefits of dynamic balancing

Rather than trying to remove all vibration from the machinery, it is beneficial to seek to balance the machinery to the greatest extent possible.


Rather than trying to remove all vibration from the machinery, it is beneficial to seek to balance the machinery to the greatest extent possible. Courtesy: L&S ElectricThe ultimate goal in any piece of equipment is to have it operating free of any vibration while running smoothly for a long time. In reality, however, vibration is always going to be a part of any rotating machinery, and certain levels of vibration may even be acceptable. Rather than trying to remove all vibration from the machinery, it is beneficial to seek to balance the machinery to the greatest extent possible. This reduces vibration to the point of reduced noise levels, and the existing vibration doesn't affect machine life.

One method of balancing is known as static balancing, and it is achieved by using low friction bearings to allow the machinery to settle so that the heaviest point is on the bottom. It is then possible to remove material from the lower point or add it to the top point until it is rotating on the true axis. The process of static balancing is continually repeated until the heavy point no longer exists.

The problem with static balancing is that it can give a false correction, so the machinery is not truly balanced. Although this type of balancing may be perfectly acceptable on smaller machines, and it is a step in the right direction, using dynamic balancing is a much more effective way of removing vibration and extending the life of the machine.

Dynamic balancing is performed with sensors attached to the bearing pedestals. It allows for the identification of the imbalance on two planes so that a real correction can take place. It makes use of machinery to identify the point of the imbalance and correct it. Other factors to consider are the length of the machine as well as its operating speed.

A problem with unbalance may be linked to various issues with the machine. These could include fabrication problems at the place of assembly, installation problems, and a machine that has been in service for an extended amount of time.

Benefits of dynamic balancing

When a machine is operating in balance, it is functioning as designed. Numerous consequences could result from having a machine in a smooth, well-balanced operating order. These outcomes include the following:

  • Low vibration: One of the greatest sources of vibration is unbalance.
  • Low noise: Mechanical vibration is also one of the leading causes of airborne noise.
  • Operator fatigue: The exposure to high levels of noise and vibration can affect the efficiency of the operator.
  • Operator safety: Machine failure is less likely to occur, personal safety is increased.
  • Bearing life: Balancing the machine can extend the bearing life as it is affected most by unbalance.
  • Structural stress: Due to the fact that vibration associated with unbalance is absorbed by the surrounding structure, having a machine operating in balance will reduce structural stress.
  • Operating cost: Many facilities will keep extra machines on hand in case a breakdown occurs. Because machines operate longer and with fewer problems, you can keep fewer machines on hand.
  • Productivity: The increase in uptime improves productivity.

Make sure that you include a vibration analysis in your preventative maintenance program. Not only can it help to identify a problem, it can often lead to a solution as to what can be done before a major failure occurs.

- David Manney is a marketing administrator at L&S Electric. This article originally appeared on L&S Electric Watts New Blog. L&S Electric Inc. is a CFE Media content partner.

The Top Plant program honors outstanding manufacturing facilities in North America. View the 2015 Top Plant.
The Product of the Year program recognizes products newly released in the manufacturing industries.
Each year, a panel of Control Engineering and Plant Engineering editors and industry expert judges select the System Integrator of the Year Award winners in three categories.
Doubling down on digital manufacturing; Data driving predictive maintenance; Electric motors and generators; Rewarding operational improvement
2017 Lubrication Guide; Software tools; Microgrids and energy strategies; Use robots effectively
Prescriptive maintenance; Hannover Messe 2017 recap; Reduce welding errors
The cloud, mobility, and remote operations; SCADA and contextual mobility; Custom UPS empowering a secure pipeline
Infrastructure for natural gas expansion; Artificial lift methods; Disruptive technology and fugitive gas emissions
Mobility as the means to offshore innovation; Preventing another Deepwater Horizon; ROVs as subsea robots; SCADA and the radio spectrum
Research team developing Tesla coil designs; Implementing wireless process sensing
Commissioning electrical systems; Designing emergency and standby generator systems; Paralleling switchgear generator systems
Natural gas engines; New applications for fuel cells; Large engines become more efficient; Extending boiler life

Annual Salary Survey

Before the calendar turned, 2016 already had the makings of a pivotal year for manufacturing, and for the world.

There were the big events for the year, including the United States as Partner Country at Hannover Messe in April and the 2016 International Manufacturing Technology Show in Chicago in September. There's also the matter of the U.S. presidential elections in November, which promise to shape policy in manufacturing for years to come.

But the year started with global economic turmoil, as a slowdown in Chinese manufacturing triggered a worldwide stock hiccup that sent values plummeting. The continued plunge in world oil prices has resulted in a slowdown in exploration and, by extension, the manufacture of exploration equipment.

Read more: 2015 Salary Survey

Maintenance and reliability tips and best practices from the maintenance and reliability coaches at Allied Reliability Group.
The One Voice for Manufacturing blog reports on federal public policy issues impacting the manufacturing sector. One Voice is a joint effort by the National Tooling and Machining...
The Society for Maintenance and Reliability Professionals an organization devoted...
Join this ongoing discussion of machine guarding topics, including solutions assessments, regulatory compliance, gap analysis...
IMS Research, recently acquired by IHS Inc., is a leading independent supplier of market research and consultancy to the global electronics industry.
Maintenance is not optional in manufacturing. It’s a profit center, driving productivity and uptime while reducing overall repair costs.
The Lachance on CMMS blog is about current maintenance topics. Blogger Paul Lachance is president and chief technology officer for Smartware Group.
The maintenance journey has been a long, slow trek for most manufacturers and has gone from preventive maintenance to predictive maintenance.
Featured articles highlight technologies that enable the Industrial Internet of Things, IIoT-related products and strategies to get data more easily to the user.
This digital report will explore several aspects of how IIoT will transform manufacturing in the coming years.
Maintenance Manager; California Oils Corp.
Associate, Electrical Engineering; Wood Harbinger
Control Systems Engineer; Robert Bosch Corp.
This course focuses on climate analysis, appropriateness of cooling system selection, and combining cooling systems.
This course will help identify and reveal electrical hazards and identify the solutions to implementing and maintaining a safe work environment.
This course explains how maintaining power and communication systems through emergency power-generation systems is critical.
click me