50 YEARS OF EXPERIENCE

CUSTOMIZED, COST-EFFICIENT AND RELIABLE SOLUTIONS

ALL FROM ONE SOURCE

ARE VIBRATIONS REALLY EVERYWHERE?


Yes, and that is why we need a wide range of solutions to reduce vibrations. The aim is always to minimize the impact on production and quality processes as well as environmental pollution. This is exactly what we are specialized in for 50 years.

If your industry or specific vibration problem is not listed on this page, please contact us anyway and we will find a solution.

Please contact us personally

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We are happy to advise you on questions relating to the active and passive reduction of vibrations and support you in solving your specific vibration problem.

Dr.-Ing. Georg Enß
Wind Energy

+49 40 524715-262
enss@woelfel.de
Formular

Dr.-Ing. Marcus Ries
Mechanical and Plant Engineering

+49 931 49708-370
ries@woelfel.de
Formular

PRODUCTS FOR VIBRATION REDUCTION IN INDUSTRIAL AND POWER PLANT ENGINEERING


For vibration reduction in industrial plants and power plants, we prefer to use absorbers and viscoelastic dampers. These systems are mounted directly on the vibrating structure – ideally in the immediate vicinity of the affected area – and have a vibration-reducing effect. They work very efficiently and are characterized by high robustness. This makes them cost-effective and reliable solutions to vibration problems.

Vibration absorbers

Basically, there are different concepts for vibration absorbers: passive systems, semi-active systems and active systems.

Conventional methods for reducing pipeline vibrations in plant engineering often require a strong intervention in the pipeline system, combined with high constructional, financial and time expenditure. Wölfel has developed two absorber systems that effectively reduce pipeline vibrations. They offer significant advantages compared to traditional measures:

ADD.Pipe is an active pipe damper (ADD stands for Active Damping Device) and can greatly reduce pipe vibrations over a wide frequency range. It is a system with three degrees of freedom consisting of three actuators and reaction masses. Thus, all vibrations in different directions to the pipe axis can be reduced.

TMD.Pipe is a passive pipe damper (TMD stands for Tuned Mass Damper). Learn more about the system here.

 

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Viscoelastic dampers

Damping as a method of vibration reduction is only effective if the vibrating system is excited at a frequency close to its natural frequency. Due to their design principle, viscoelastic dampers can be used over a wide frequency range. They reduce vibrations by converting kinetic vibration energy into heat, thus damping the motion of the system.

 

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TMD.PIPE

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TMD.Pipe is a passive pipe damper. It consists of a mass, restoring elements and dampers. The operating principle: The TMD, which is tuned to the resonance of the pipeline, significantly increases the damping and thus reduces the resonant amplitudes. A major advantage is that no abutment is required. Thus, the TMD.Pipe can be installed almost anywhere and optimized exclusively according to effect criteria.

Case Study: "TMD.Pipe Solves Vibration Problem" 169.58 KB
Case Study "TMD.Pipe Solves Vibration Problem"

In a natural gas plant pipe vibrations caused serious problems during commissioning. The installation of tuned mass dampers not only reduced vibrations to a minimum but also allows the plant operation run most effectively.

PRODUCTS FOR VIBRATION REDUCTION ON MACHINES


From machine tools to paper machines and printing machines – in addition to engineering services, we also offer numerous products for reducing vibrations on the above-mentioned as well as other types of machines:

● Vibration absorbers TMD.X: We develop problem-specific passive absorbers (TMD stands for Tuned Mass Damper) to reduce resonance or tonal (mono-frequency) issues – including the passive pipe absorber TMD.Pipe.

ADD.Drive: Using the hardware already present in machines or vehicles (e.g. drive amplifiers, motors, motor control, sensors), a vibration problem (e.g. during positioning processes) can often be solved by specifically extending the existing control software. An extensive software library makes it possible to individually adapt the required software modules to the problem.

ADD.45N: ADD.45N is an active system for broadband damping of mechanical structures. The plug&play system consists of a 45 N actuator (sensor integrated) and a rack. This includes the sensor electronics and a controller for active damping including a power amplifier. Up to two 45 N actuators can be connected to and supplied by one rack. Each controller is parameterized via a separate potentiometer. In addition to closed-loop operation, the system can also be operated with its own hardware. In this case, control signals can be transmitted to the amplifier via a BNC socket and thus the actuator can be controlled. The magnetic feet of the actuator make it easy to attach it to existing structures (retrofit of machines subject to vibration). The cut-off frequency is 8 Hz, further information can be found on the homepage of our subsidiary Micromega.

ADD.1kN: This product is a 35-kilogram inertia mass actuator with a 1000 N nominal force and an 8 Hz cut-off frequency, which can be used e.g. for active vibration reduction. Further information can be found on the homepage of our subsidiary Micromega.

ADD.x: Under ADD.x we summarize our further problem-specific developments for active vibration reduction. The systems or system components were developed for specific customer queries and then converted into products. Such a product or customized product development can also be used for the problem on your machine. This includes for example: ADD.IN (inertial mass actuator, mass 80 gr, cut-off frequency 12 Hz), ADD.5N (inertial mass actuator, mass 250 gr, cut-off frequency 21 Hz), ADD-2D-250N (2D-inertial mass actuator, mass 18 kg, cut-off frequency 22,5 Hz), ADD.Sound (6 kN inertial mass actuator with amplifier), ADD.Pipe

Further information can be found on the homepage of our subsidiary Micromega.

 

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