Decoupling elements
Decoupling elements
ESM supplies a wide range of small rubber-metal components and rubber buffers for the elastic mounting of electrical enclosures, busbars and other sensitive items. Our standard products can be adapted to your requirements – and even custom rubber-metal components and rubber buffers can be developed. Our components are designed for the complete lifetime of the system so that no replacement is necessary.
One highlight developed by ESM is the combination mount. It has similar adjustable properties in all directions, i.e. tensile and compressive forces of a similar magnitude can be transferred. Even when exposed to radial loads, the connecting bolt experiences negligible static and dynamic bending loads, meaning the mount can have a very small size. In addition, the mounts’ stiffness and hole patterns can easily be adapted to clients’ requirements.
Properties
- Design for system lifetime
- Isolation of structure-borne noise
- Compensation of manufacturing tolerances
- Reduction of constraining forces
- Integrated fail-safe function
- Optimized damping
Applications
- Mounting of electrical enclosures, busbars and other components
- Mounting of pipelines and aggregates, which are loaded in two or three axes
- Wind turbines, drivetrains, construction, general engineering, others
Cover mounts
ESM cover mounts are ideal for isolating the nacelle cover of a wind turbine from the main frame. Simple rubber-metal components or modified generator mounts are used here. They reduce the transferred forces in vertical and horizontal direction on the nacelle cover.
Properties
- Available with or without height adjusting device
- A wide range of different cover mounts is available
Applications
- Decoupling of nacelle covers of wind turbines
- Others
Teeter hinge
The rotors of two-bladed wind turbines have to transfer higher dynamic loads to the drivetrain than three-bladed rotors due to wind shear. If the blades are rigidly fixed to the rotor shaft, these high dynamic loads are directly transferred to the drivetrain. Therefore, an elastic joint is installed between rotor and drivetrain to reduce the dynamic loads on the wind turbine. The ESM elastic joint (teeter hinge) consists of several elastomer layers to archieve the necessary rotation angles. Furthermore, ESM rubber-hydraulic elements can be used to turn the pitch axis of the blades.
Properties
- The teeter hinge consists of several simple rubber mounts
- The rubber elements can be easily fitted and removed
- ESM rubber-hydraulic elements can be used to actively control the rotor
Applications
- Wind turbines with two-bladed rotors
Decoupling of the main bearing
Wind turbines with three-point suspension have a main bearing in front of the drivetrain. This main bearing absorbs the axial force and part of the radial force. The yaw and bending moments lead to a tipping of the drivetrain due to the deflection of the elastomeric gearbox support. To compensate for the tipping of the drivetrain, a spherical bearing is normally used as the main bearing. Axial deflection is possible in these bearings (if not pre-stressed), leading to high axial gearbox shocks.
A tapered roller bearing is used in the ESM main bearing isolation. As these bearings are pre-stressed, no axial shock from the axial movement in the main bearing is possible. An elastomeric isolation system is positioned between the tapered roller bearing and the housing to enable the tipping of the drivetrain. Furthermore, this elastomeric isolation leads to higher drivetrain damping and the isolation of acoustic noise between the drivetrain and the main frame.
In the high MW wind turbine class, the elastomeric main bearing isolation provides a commercial alternative to four-point-suspension. The system can be adapted to different roller bearings.
Properties
- Isolation of acoustic noise
- Additional damping of the drivetrain
- Compensation of fabrication tolerances and stiffness variation of the housing through the elastomer
Applications
- Alternative system for three-point-suspension based on tapered roller bearings instead of spherical bearings
- For four-point suspension based on a pre-stressed tapered roller bearing in combination with a cylindrical roller bearing in separate housings
- Drivetrains and components