Dynamic Balancing Course
The Dynamic Balancing Course focuses on the fact that balancing is vitally important. A precision balanced machine exerts less stress on its bearings and structural components, which means it will run longer without requiring maintenance. Modern vibration analysers provide the means to perform the balance, but there is a lot to learn in order to be successful.
Introduction
Machines that have been precision balanced run longer, and cost less to run. Unbalance causes fatigue and reduces the life of bearings and can make looseness and resonance conditions far worse. This course will equip you with the knowledge and skills so that you can use a vibration analyzer/balancer, or a simple sheet of graph paper and protractor, and balance a machine – without even having to remove it from the plant. You will learn how to recognize unbalance and set up the balance job for a successful balance. We will start with the basics, providing an introduction to vibration, phase and vectors, and fully explain the balancing process. You will learn how to balance a machine using the single-plane and two-plane balance function of your analyzer, after you first learn how to perform a single plane balance with vectors. You will watch a demonstration of the balance process, and you will be able to try it for yourself.
What’s included
Type of Course
This is a private course for organisations with 5 or more students.
Public courses may be offered later in 2021 – send us an email if this is of interest.
Location
Onsite course – UK & Ireland. Worldwide by agreement.
Virtual course – Microsoft Teams/Go-to-Meeting. Worldwide.
Duration
Onsite course – 1-2 days
Virtual course – 1 day
No. of Students
Both variations require a minimum of 5 students.
Pricing
To receive a quotation, use the ‘Onsite Private Course’ button above.
Content and Materials
All items in the Topics section below are covered during the 1-day engagement.
The second onsite day is used for practical onsite applications and for greater topic depth.
Each student is sent the Course Slide deck in printed form.
Dynamic Balancing Course Description
Who should attend?
If you have to balance machines, then you need the dynamic balancing course. If you own a modern analyzer/balancer you have two choices: you can just take the readings and do what the analyzer tells you to do, or you can understand what you are doing and be prepared when things go wrong – and they will. We will ensure you understand the entire process, and give you the skills to return to the plant and perform precision balancing. Note: Although we will not have time to explain the operation of every model of vibration analyzer, we will provide you with the knowledge so that you will be successful with whatever model you own.
What is unique about this course?
Mobius helps us make the dynamic balancing course unique. We use 3D animations, Flash simulations, and software simulators that completely explain and demonstrate the balancing process – you need to see them to believe them! You will understand vibration, phase, vectors and the calculations required. And you will understand the balancing process.
Topics
What is unbalance:
- Static and couple (with animations)
- Dynamic
Why do machines become out of balance
Using vibration analysis to ensure it is out of balance and not misaligned
Dealing with runout and eccentricity, etc.
The balancing check-list
- What you must have in place to do the balance job
Practical issues
- Stopping and starting the machine
- Knowing where to place the weights
- Where do you get the weights (what can be used as trial and final weights)
Quick review of amplitude and phase readings
- Relationship between vibration and unbalance and speed
- Relationship between balance weight/force and radius
- Phase conventions
Collecting vibration and phase readings
- What type of vibration and phase sensor to use
- Accelerometers and proximity probes
- Optical and laser tachometers
- Keyphasors
- Can you use a strobe to balance?
- Where to place the sensors
- Mounting the sensors
Understanding vectors
- What are they?
- Adding and subtracting vectors
- Polar plots
- Heavy spot and high spot
- Leading and lagging phase
Single plane balancing
- Review of the process
- When can you use the single-plane method
- Using vectors to perform single-plane balancing
- Using modern data collectors/analyzers to perform single-plane balancing
Estimating the size for the trial weight
Adding weights
- Leaving the trial weights on between runs
- Removing the trial weights between runs
- Splitting weights: when the solutions calls for a weight between two blades or holes
- Combining weights: when balance weights are already on the machine and you wish to consolidate them
Two-plane balancing
- Review of the process
- When should you use the two-plane method
- Using modern data collectors/analyzers to perform two-plane balancing
The static-couple method
Balancing overhung machines
A quick review of balancing flexible rotors
Balancing standards
- ISO grades
- Using the charts
- Which grade to use
Why dynamic balancing may not be successful
- Machine is not out of balance
- Resonances
- Bad phase reference
The four-run method – balancing without phase
A quick introduction to shop balancing
We will demonstrate the entire process, and you will also be able to take readings and balance a machine.
FAQs
Can this course be take from a distance?
We cover all the topics listed on both the onsite and virtual course. This course does lend itself best to an onsite engagement.
Do I need my own technical equipment?
No, although many students do have access to equipment onsite. If that is not the case, we will anyway demonstrate using our own equipment.
How much does the course cost?
Pricing depends on a number of factors. Please complete the ‘Custom Quotation’ form above.
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Stephen K –
Always a pleasure to attend a course with the Reliability Training Institute.