Damping arrangement for an oscillatably mounted electrical energy transmission device

Abstract

A damping configuration for an oscillatably mounted, electrical energy transmission device includes a supporting frame which is connected to stationary abutments through a plurality of damping elements. A group of first and second damping elements which have damping rates dimensioned so as to differ from one another and which act in parallel, connect the supporting frame to the abutments. Favorable damping of both weaker and stronger movements, for example caused by an earthquake, is ensured due to a combination of damping elements having differently dimensioned damping rates.

Claims

1. A damping configuration for an oscillatably mounted electrical energy transmission device, the damping configuration comprising: at least one abutment having an upper surface disposed along a plane; a supporting frame; and a plurality of mutually parallel damping elements including first and second damping elements having mutually different rated damping rates, said damping elements having a lower rated damping rate supporting said supporting frame; said first and second damping elements acting in parallel to connect said supporting frame to said at least one abutment; said plurality of damping elements having longitudinal axes distributed along a circular path parallel to said plane of said upper surface of said at least one abutment, and said first and second damping elements alternating with one another over a course of said path.

2. The damping configuration according to claim 1, wherein said at least one abutment is stationary.

3. The damping configuration according to claim 1, wherein at least one of said first or second damping elements has a substantially linear damping behavior.

4. The damping configuration according to claim 1, wherein said first and second damping elements have an identical construction.

5. The damping configuration according to claim 1, wherein said first and second damping elements have constructions differing from each another.

6. The damping configuration according to claim 1, wherein at least one of said first or second damping elements acts as a friction damper.

7. The damping configuration according to claim 1, wherein at least one of said first or second damping elements acts as a hydraulic damper.

8. The damping configuration according to claim 1, wherein at least one of said first or second damping elements acts as a pneumatic damper.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

(1) An exemplary embodiment of the invention is shown schematically in a drawing and will be described in more detail below. In the drawing

(2) FIG. 1 shows a view of a damping arrangement comprising a supporting frame,

(3) FIG. 2 shows a view of a wire cable spring,

(4) FIG. 3 shows a plan view of the supporting frame known from FIG. 1, and

(5) FIG. 4 shows a hydraulic damper or a pneumatic damper.

DESCRIPTION OF THE INVENTION

(6) FIG. 1 shows a side view of an electrical energy transmission device. The electrical energy transmission device is provided with an upright 1. The upright 1 is part of a supporting frame 2. A drive device 3 is supported on the upright 1. The drive device 3 is accommodated in a housing providing protection against weathering influences. The drive device 3 is used for driving switching contact pieces of an interrupter unit of a circuit breaker 4 which are movable relative to one another. The circuit breaker 4 has a base with a post insulator 5, which is supported on that end of the upright 1 on which the drive device 3 is arranged. The post insulator 5 is hollow, with the result that transmission of a movement output by the drive device 3 via a kinematic chain in the interior of the post insulator 5 can take place and can be transmitted to the switching contact pieces of the circuit breaker which are movable relative to one another.

(7) The supporting frame 2 is supported on a pedestal 6. The pedestal 6 is anchored in the ground and acts as abutment. The supporting frame 2 is supported on the pedestal 6 via a plurality of first and a plurality of second damping elements 7, 8. The damping elements 7, 8 are arranged along a circular path, wherein a first and a second damping element 7, 8 are arranged in each case successively around the circular path. Preferably, the number of first and second damping elements 7, 8 should be an even number, so that a continuous change between the first and second damping elements 7, 8 is provided in the case of a closed revolution of the path. The first and second damping elements 7, 8 have mutually different rated damping rates, i.e. the first damping elements 7 are provided with a weaker rated damping rate than the rated damping rate of the second damping elements 8. In other words, the first damping elements 7 convert kinetic energy into other energy forms, for example heat, to a lesser extent than the second damping elements 8. In this case, the first and second damping elements 7, 8 each have the same designs. In the present exemplary embodiment, the use of wire cable spring dampers is provided.

(8) By way of example, a design of a wire cable spring damper is illustrated in FIG. 2. A wire spring damper has a multiply stranded wire cable 9, which is wound helically with elastic deformation. In order to keep the wire cable 9 wound in helical fashion in shape, a first yoke 10 and a second yoke 11 are provided in the direction of the winding axis of the wire cable 9. The yokes 10, 11 are oriented substantially parallel to one another and lie, on the lateral surface side, on mutually opposite sides of the wound wire cable 9. In this case, the yokes 10, 11 are formed in two parts, wherein in each case cutouts are provided in a joint between the yokes 10, 11, through which cutouts the turns of the wire pass. The turns are spaced apart from one another via the yokes 10, 11, wherein spontaneous unwinding of the turns is prevented. The subelements of the yokes 10, 11 are fixed so as to press the wire cable 9 into the cutouts by means of threaded bolts 12. As a result, a helical profile of the wire cable 9 is established. The wire cable springs of the first damping elements 7 have a lower intrinsic damping/friction than the wire cable springs of the second damping elements 8.

(9) It is possible by virtue of the two yokes 10, 11 to fasten firstly the supporting frame 2 and secondly the pedestal 6. For this purpose, studs are illustrated symbolically on the pedestal 6 in FIG. 1, with the respective second yoke 11 of the damping elements 7, 8 being fastened on said pedestal. Opposite this, the first yoke 10 is connected to the supporting frame 2. As a result, the winding axis of the wire cable 9 is substantially perpendicular to a weight force axis 13, with which weight forces of the circuit breaker 4 at rest are introduced into the supporting frame 2 or into the pedestal 6. The first and second damping elements 7, 8 in this case each serve to mount the electrical energy transmission device comprising the supporting frame 2 in oscillatory fashion. Provision is made here for both the first and the second damping elements 7, 8 to be used for mounting the electrical energy transmission device. Alternatively, however, provision can also be made for only the first damping elements 7, which have the reduced rated damping rate, to perform a supporting function for the electrical energy transmission device, whereas the second damping elements 8, which have a greater rated damping rate, can merely serve to damp a relative movement of the supporting frame with respect to the pedestal or another abutment.

(10) The outer configuration of the damping elements 7, 8 used is identical independently of their respective rated damping rate. Preferably, in each case an identical number of turns, an identical dimensioning of the turns and the use of identical yokes 10, 11 are provided. The damping rate is determined substantially by the type of stranding of the wires of the wire cable 9 and the surface properties thereof, i.e. the intrinsic friction behavior of the wires of the wire cable 9.

(11) Furthermore, provision can also be made, however, for a variation to be provided between the first and second damping elements 7, 8 via the dimensioning of the wire cable 9, the number of turns, the diameter of the turns, etc.

(12) In addition to the use of identical designs for the first and second damping elements 7, 8, mutually different designs can also be used for the first and second damping elements 7, 8. For example, alternative constructions of friction dampers, such as, for example, spiral springs, leaf springs, elastomer buffers, etc. can be used. However, provision can also be made for a hydraulic damper or a pneumatic damper 18 shown in FIG. 4 in the manner of a hydraulic spring or in the manner of a pneumatic spring to be used as damping element.

(13) FIG. 3 illustrates a plan view of the supporting frame 2. The supporting frame 2 has an octagonal base plate 14, which is substantially planar. A plurality of substantially rectangular receiving plates 15 are connected to the base plate 14 at a rigid angle on a circular path, which is arranged centrally with respect to the center point of the octagonal base plate 14. In each case one outer edge delimiting the receiving plates 15 is in this case oriented substantially parallel or perpendicular to a body edge of the hexagonal base plate 14. The receiving plates 15 are in this case connected flat to the base plate 14, with the receiving plates 15 protruding beyond the sides between the eight corners of the base plate 14. The receiving plates 15 are therefore arranged distributed on a circular path/polygon function around the center of the base plate 14. Cutouts 16 are arranged in the center of the base plate 14 (point of intersection between the central verticals of the sides of the base plate 14), and the upright 1 can be bolted in said cutouts, with the result that the weight force axis 13 is in this case perpendicular to the plane of the drawing in FIG. 3. The receiving plates 15 are arranged distributed symmetrically around the circular path, with the result that the receiving plates 15 are in a circular orbit, in each case pivoted through an angular dimension of 45. Correspondingly, eight receiving plates 15 result in the orbit, which receiving plates are used for receiving four first damping elements 7 and four second damping elements 8. The positions of the four first damping elements 7 are denoted by the Roman numerals I, II, III and IV. The position of the four second damping elements 8 is denoted by the Roman numerals V, VI, VII and VIII. The first and second damping elements 7, 8 in the form of wire cable spring dampers are in this case positioned on the supporting frame 2 in such a way that the winding axes (in the same way as the longitudinal axes of the yokes 10, 11) are oriented parallel to the sides of the octagon of the base plate 14. Correspondingly, the winding axes of the wire springs are each substantially perpendicular to the central vertical 17 of the sides of the base plate 14.

(14) In the case of a movement of the circuit breaker 4, a movement is transmitted to the first and second damping elements 7, 8. Both groups of first and second damping elements 7, 8 are involved in oscillatory supporting of the supporting frame 2, wherein, owing to the selection of the rated damping rates, initially at least substantially only the first damping elements 7, i.e. the damping elements with the lower rated damping rate, perform damping of the introduced movement during deformation. On the other hand, the group of second damping elements 8 at first does not have any damping effect (or a comparatively insubstantially small damping effect). Only when there is an increase in the amplitude and/or the rate/frequency of the movement on the supporting frame 2 relative to the pedestal 6 does additional damping parallel to the (possibly decreasing) damping effect of the first group of first damping elements 7 by the group of second damping elements 8 become effective. Thus, both in the case of small movements at the electrical energy transmission device, slight damping is made possible and, in the case of an increase in the amplitude of the movement, said movement is damped to a greater degree by the second damping elements 8.