Jzf4/Fjq Series 23-400mm² 330kv and Above Electric Power Fitting Spacer Dampers for Anti Jumper of Overhead Line

The working principle of the damping spacer:
the vibration of the wire caused by the breeze and the vibration of the sub-gap induced by the strong wind will cause the fatigue of the wire, and the looseness of the fastener will cause the wire to wear. Split wires use spacers for stable electromechanical performance. The damping spacer is to use the elasticity of the rubber element to obtain the required rigidity so that it can have sufficient mobility while maintaining the geometric dimensions of the split wire. Utilize the viscosity of rubber to absorb enough energy under alternating stress to achieve the purpose of suppressing wind vibration.
The damping performance of the damping spacer is related to the damping coefficient of the rubber element material. However, the damping effect of the rubber element is more closely related to the structure and use status of the spacer. The damping performance is a key parameter for researching and designing damping spacers. The vibration absorption characteristics and durability of various types of damping spacers can be estimated and compared by testing their stiffness and energy consumption.
The testing principle
of the damping spacer: A support wire support of the damping spacer is connected with the slider of the simulated vibration table to form a rocker slider mechanism, and the vibration of the slider is used to simulate the working state of the damping spacer on the overhead wire. Test the loop line of the damping spacer rod on the overhead wire to support the amplitude of the support line changing with the external force. The area enclosed by this loop line is the weekly energy loss. The average stiffness is calculated from the maximum external force and amplitude.
The anti-dancing mechanism of the clamp rotary spacer:
the ice coating of single wire and split wire is very different. The axis of the transmission line is generally eccentrically iced and facing the windward side. After the conductor is coated with ice, the mass imbalance will twist around its own axis. The cross-sectional shape of the iced conductor becomes uniform during the process of continuous twisting and ice coating. It has the effect of suppressing the galloping of the wire. The split conductors have spacers at intervals to fix the sub-conductors, so that the sub-conductors cannot rotate accordingly near the spacer rods. At the same time, due to the fixed connection, the torsional rigidity of the shorter sub-gauge conductor is increased. The sub-conductor of the sub-gap requires a larger static torque to be reversed, and it is difficult for the conductor to rotate around its own axis. The torsion coefficient of the split wire is much larger than that of the single wire, and the uneven icing is more serious, so the split wire is more likely to gallop than the single wire.
The dancing defense principle of the wire clamp rotary spacer: the rotatable wire clamp is the key to defending against dancing. When the sub-conductors are fixed with spacers, half of the sub-conductors can rotate within a certain range. Even in the case of icing, the conductors can also use the ice-coated and snow-covered eccentric mass to twist, and form by twisting around their own axes Evenly round with icing. So as to achieve the purpose of suppressing the ice-coated galloping of the wire.