Stockbridge Vibration Damper used in Transmission Line
Stockbridge Vibration Damper used in Transmission Line
Stockbridge Vibration Damper
Stockbridge Dampers are solid dampers used to help suppress the vibrational impact on outdoor electrical structures caused by windy weather, limiting the damage caused to fragile cables and wires.
huaneng Product Page
A classic damper long favoured for its efficiency, the Stockbridge Vibration Damper is made from solid aluminium and galvanized steel. This maximises the resilience of the damper against the full range of weather conditions whilst maintaining a lightweight finish.
Its distinctive dumbbell shape consists of a flexible cable with two weighted ends and a central clamp. This design makes it ideal for safely dissipating energy throughout the connection, and it works with a wide frequency range.
Economic, effective, and easy to install, the Stockbridge Vibration Damper is the ideal choice for achieving maximum weather protection whilst facilitating optimum energy efficiency.
Suitable for clamping connectors between 1.1- 1.7&#; and for use on overhead power lines, OPGWS, cable-stayed bridges, long cantilevered signs, and more.
Key Features:
- Suppresses weather induced vibrations
- Aluminium safety plate and clamp
- Galvanized steel cable & weights
- Suitable for cables between 1.1 &#; 1.7&#;
- Effective on a range of frequencies
- Optimized barbell design
- Safe, easy installation
- Rust resistant
Get Free Quote
How Vibration Damper Works in Transmission Line?
How Does a Small Size Damper Reduce Vibration in Transmission Lines?
Vibration dampers are usually used in high voltage and extra-high voltage electrical energy overhead transmission lines to handle aeolian and galloping or dancing vibrations in the transmission lines' conductors. The dampers are designed in such a way that they attenuate the line vibrations by reaching the same frequency as the cable that has wind-induced vibrations.
The overhead Transmission Line mainly experiences two types of vibrations in a vertical plane which can be categorized into two groups.
Aeolian Vibration;
Galloping or Dancing vibration.
Aeolian Vibration has a high frequency and low amplitude at shallow velocity (
4 to 15 km/hr)
of wind, like- a vibration frequency of 5 to 40 cycles/second, and the amplitude is 2 cm to 5 cm with a loop length of 1 m to 10 m.
Galloping or Dancing Vibration is having self-explanted type of a low frequency but higher amplitude, like- 1/4 &#; 3/2 cycle/second, and an amplitude of vibration around 10 m.
The Vibration phenomenon in the Transmission Line is solved by using specially designed dampers called
Stockbridge Damper
which
is basically a device to absorb vibration energy and prevent vibration in the Transmission Line.
Stockbridge Damper
Want more information on transmission line dampers? Feel free to contact us.
The Stockbridge damper was invented in the s by engineer George H. Stockbridge, as per his name it is called Stockbridge. In early Stockbridge dampers used concrete as damper mass material, nowadays it uses some heavy metal.
As in the figure's right end, the Stockbridge Damper has two masses at the ends of a connecting rod or stiff cable which gives it a dumbbell shape. It is connected to the line conductor immediately above it through a clamp.
They can effectively dampen Aeolian wind vibrations.
See video of what actually happens during conductor vibration
Stockbridge Dampers
absorb vibrational energy and thus prevent the formation of standing waves which can cause serious stress fatigue to the energy transmission line and damage it.
The Spiral Vibration Damper
Smaller diameter
(less than 0.75")
Spiral Vibration Damper.conductors like shield wire or optical ground wire (OPGW), a Stockbridge damper is not suitable rather a different type and more effective damper is available named
The Spiral Vibration Damper has been used successfully over the last few decades to control Aeolian Vibration on these smaller sizes of overhead transmission line conductors and wires.
Spiral Vibration Damper
Spiral vibration dampers have a helically-formed damping section sized for the interplay of damper and cable to provide the action/reaction motion
such that they impact during Aeolian vibration activity
that absorbs the natural vibration wave.
The company is the world’s best active damping vs passive damping supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.