Design and calculation

Thanks to decades of experience and in-depth expertise in the field of drive technology, we can customise belt drives precisely to your requirements. Our analyses and advice not only cover the planning of new drive systems, but also the testing and improvement of existing systems. The aim is to reduce operating costs and at the same time increase the service life of the components by analysing performance precisely.

To ensure an optimum design, we calculate defined geometries for pulleys based on the respective centre of gravity of the application. This ensures that the drives achieve maximum service life with maximum performance. We use state-of-the-art tools and technologies:

  • Design programmes from leading V-belt and timing belt manufacturers
    Precise calculations of the required dimensions and load limits
  • 3D CAD software
    Detailed design and visualisation of the drive systems
  • FEM analysis technology (finite element method)
    Simulation and optimisation of the load and stability of the components

 

Whether planning new belt drives or analysing and optimising existing systems, our service delivers reliable and customised solutions. Through this precise and technology-based approach, we ensure that your drive systems meet the highest requirements and make a decisive contribution to the productivity and sustainability of your machines.

 
 

Calculation of belt drives

Belt drives are at the heart of many machines and systems where precision, efficiency and reliability are essential. But how do you ensure that the belt drive is perfectly matched to the requirements? The answer lies in the right calculation! With our precise drive calculation, we ensure smooth operation and maximum performance - precisely tailored to your individual requirements.

Incorrect calculation can lead to inefficient performance, increased wear or even system failure. With the right calculation, you can ensure that your belt drive works reliably, saves costs and extends the service life of your machines.

 
 

The most important parameters

Power (P)
The transmitted power that the belt drive must deliver.
Unit: kW or PS

Torque (M)
The torque that must be transmitted to the drive.
Unit: Nm

Rotation of the drive shaft (n1)
The speed of the drive shaft.
Unit: rpm

Rotation of the output shaft (n2)
The speed of the output shaft.
Unit: rpm

Number of teeth on the pulleys (z1, z2)
Determines the transmission ratio between the drive and output pulley.
Unit: Number of teeth

Transmission ratio (i)
The ratio between the speeds of the input and output shafts or the number of teeth on the pulleys.

Belt speed (v)
The speed at which the belt moves.
Unit: m/s

Belt tension (F)
The tension of the belt to transmit the required power.
Unit: Hertz (frequency) or Newton (tensile force)

 

As part of our drive calculation, we ensure that all these parameters are perfectly harmonised. We take into account all relevant factors such as power, speed, belt type and safety factors to provide you with the ideal belt drive - efficient, durable and cost-saving.

Whether you are optimising an existing system or planning a new design, with our support you will receive precise calculations that make all the difference.

Contact us for a personalised consultation and calculation of your belt drive.

Drive design Optibelt CAP 
Drive design Optibelt CAP
Drive design flat belt Forbo 
Drive design flat belt Forbo
Drive design Gates Design Flex 
Drive design Gates Design Flex
Drive design PTS Strongbelt 
Drive design PTS Strongbelt
 
 
 

Design and analysis of pulleys

The design and analytical evaluation of belt pulleys play a crucial role in the construction and operation of belt drives. Incorrect pulley design can lead to a variety of problems, such as excessive wear, inadequate power output, uneven belt tension or even drive failure. To avoid such problems, the pulley must be precisely adapted to the specific requirements of the drive. Both static and dynamic loads play a role here, as does the correct ratio of belt to pulley size.

 
 

Sub-steps of the belt design

Determining the operating conditions

  • Determining the required torque and speed values
  • Determining the belt type (V-belt, timing belt, flat belt, etc.)
  • Determining the ambient conditions (temperature, humidity, vibrations, etc.)


Determining the pulley size

  • Selection of the diameter of the pulley based on the required transmission ratio and the available space
  • Calculation of the speed ratios (transmission ratio between the pulleys)
  • Consideration of the required belt tension


Calculation of forces and moments

  • Calculation of the transmitted torque based on the power and speed
  • Determination of the forces acting on the pulley, such as centrifugal force and frictional force
  • Analysis of the tension acting on the pulley due to the forces


Selection of the material

  • Selection of the appropriate material based on the mechanical requirements, such as strength, corrosion resistance and weight
  • Commonly used materials are cast iron, steel or aluminium

Strength calculation

  • Calculation of the maximum bending stress and tooth flank stress (for timing belt pulleys)
  • Analysis of vibrations and fatigue under load
  • Checking the torsional strength and possible plastic deformation


Consideration of the belt guide

  • Determination of the optimum belt angle and the contact geometry between belt and pulley
  • Consideration of the belt tension part and the deformation of the belt


Tolerances and production

  • Determination of manufacturing tolerances (e.g. diameter, concentricity)
  • Consideration of the surface condition for optimum friction


Simulation and testing

  • Carrying out simulations to check the design, in particular with regard to dynamic load and temperature distribution
  • Testing the pulley under real conditions or through load tests


Maintenance and service life

  • Forecasting the service life of the pulley under the given operating conditions
  • Planning of maintenance intervals and possible replacement cycles
 
Tangential arm disc 3D and drawing 
Tangential arm disc 3D and drawing
Drive design for variable centre distance 
Drive design for variable centre distance
Calculation of weight, moment of inertia and moment of inertia quantity 
Calculation of weight, moment of inertia and moment of inertia quantity
Visualisation of centrifugal force in FEM analysis 
Visualisation of centrifugal force in FEM analysis
 

© Copyright Lütgert & Co. GmbH | Friedrichsdorfer Straße 48 | 33335 Gütersloh (Germany) | Phone: +49 52 41 / 74 07 0  info@luetgert-antriebe.de | Sitemap | Legal Notice | Privacy policy | Privacy policy E-mails

 

© Copyright Lütgert & Co. GmbH
Friedrichsdorfer Straße 48
33335 Gütersloh
Germany

Phone: +49 52 41 / 74 07 0
info@luetgert-antriebe.de
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