HK1115225B - Energy store - Google Patents

Description

The invention relates to a power storage device for a load switcher.

The purpose of the load switches is to switch between the various winding contacts of a loaded step transformer without interruption.

The power storage device is known from DE-PS 19 56 369 and DE-PS 28 06 282 and is pulled up by the power shaft of the load switch at the beginning of each operation, i.e. it is tensioned.

The known power storage system has guide rods on which both lifting and jumping sleds are stored independently of each other in a longitudinal motion.

The lifting slide is moved linearly relative to the spring by an eccentric connected to the drive shaft, which causes the force storage springs in between to tighten. Once the lifting slide reaches its new end position, the stop of the spring is released. This now follows in a leaping manner, since under the force of the tightened spring, the previous linear movement of the lifting slide is also linear.

WO 02/31847 also provides for the transition of the longitudinal movement of the spring slide into a rotational movement by means of a gear incorporating a gear connected to the drive shaft. This type of movement conversion results in a constant development of force which is also not advantageous for certain shift sequences.

The purpose of the invention is to specify a force storage device of the type described at the beginning which allows a simple variation of the torque course at the drive shaft, i.e. after the longitudinal movement of the skid is converted into a rotational motion. In particular, it is intended to be possible to achieve by simple technical means that the translation ratios can be varied and that a high torque is available at the end of the circuit, which ensures that the final position is reached safely and the force storage device is turned back on in all circumstances.

This task is solved by a power store with the characteristics of the first patent claim.

The force storage device according to the invention, with its arrangement of two rollers in combination with the similarly inventive interaction of these rollers with a specially designed backdrop in which the rollers are guided and with whose flanks they interfere with each other, allows to a large extent the adaptation of the specific time and torque courses of the rotation of a drive shaft derived from the linear jump motion of the jumper at the most different circuits and action sequences.

The arrangement according to the invention provides a high torque, especially at the end of the movement of the spring slide and thus the drive shaft, when the shift of the load switch is completed.

The invention is explained in more detail below by means of illustrations.

It shows: Figure 1a force storage device of the invention in perspective from aboveFigure 2the same force storage device in another perspective from belowFigure 3the role arrangement of the force storage device of the invention alone from aboveFigure 4this role arrangement in schematic perspective from above.

Figures 1 and 2 show a force storage device of the invention in different representations, although not all the elements described below can be seen in each representation and therefore not all the reference marks are included.

As is known from the state of the art described above, the force storage device described here also has an eccentric disc 1 connected to a drive shaft not shown, which operates a lifting slide 3 by acting on the participant blocks 2 arranged in the direction of movement of the lifting slide 3 above and below. The force storage device in this example has three parallel guide rods 4, 5 and 6 running along the direction of movement of the lifting slide 3, two of which are enclosed by force storage springs 8.

The invention also allows for other designs of elevator slides 3 and of elevator slides 9 and their bearings. The only important thing is that elevator slides 3 and elevator slides 9 each perform a linear motion as indicated by double arrows in the figures.

On the slide 9 on the side opposite the lift slide 3 below, a support 11 is fixed to support two downward facing rollers 12, 13 arranged in a horizontal plane in a line perpendicular to the direction of movement of the slide 9.

The movement direction of the 11th lever shown there, which corresponds to that of the 9th spring slide, is illustrated by a double arrow. In a line perpendicular to it, the two reels 12, 13 are fixed to the 11th lever.

The two reels 12, 13 correspond to a specially designed backdrop 14 incorporated in a nut-like shape into a swinging window 15; the specially designed backdrop 14 will be explained in more detail below.

The described oscillator 15 is connected to a drive shaft 18 which has a manifold 19 which is connected to an unrepresented drive shaft which transmits the generated rotational motion to the load step switch and thereby operates it.

The aforementioned backdrop 14 has an inner contour 16 and an outer contour 17, whereby in the middle area both contours 16, 17 are not parallel. In other words: the inner width of the backdrop 14 is not constant, but changing. The backdrop 14 has a Y-shaped contour, whereby the distance between inner contour 16 and outer contour 17 in the area of the outer areas of the three thighs of the Y is almost constant and corresponds to the diameter of the reels 12, 13 at least approximately. This allows one of the two reels 12, 13 to be carried in a coherent manner in each of these outer areas. In its middle area, the width of the backdrop 14 increases so that in this area one of the two reels 12 or 13 is freely moveable.

The motion sequence in an elevator of the force storage device according to the invention is as follows: a drive shaft not shown begins to rotate continuously, with which the eccentric disc 1 which slides on the corresponding passenger block 2 and thus moves the lift slide 3 in a longitudinal direction on the guide rods 4, 5, 6. This causes the force storage springs 8 to be tensioned. As the lift slide 3 approaches its new end position, these force storage springs 8 are tensioned again to the maximum before the stop. By this time the blasting slide 9 has stopped, so that it cannot follow the movement of the lift slide 3. If the new short-slit position of the lift slide is reached before the stop, a blasting force is then applied by means of a blasting device. 9 The next step in this process is known as the mechanical stop. 9 The result of the new arrest is the result of the next stop in the position of the blasting force. 9 The next stop is now known as the stop. 9 This is due to the new mechanical stop. 9 The next stop is now known as the stop.

The first roll 12, 13 which is initially attached to the formwork, moves in the direction of the rotation of the second roll 12 to the rotation of the formwork 15, which, by this rotation, again reaches the wider, widening area of the rotation of the formwork 14 again. The second roll 13 can now move in the same direction without the intervention of the second roll 13 and 12 and thus the second roll 13 can now move freely in the direction of the rotation of the formwork 13 without the intervention of the second roll 13 and 13 and thus the second roll 13 can now move in the same direction without the intervention of the formwork 13 and 12 at the same time.

The linear motion of the spring slide 9 is transmitted by the two reels 12, 13 in three consecutive periods of time to a rotation of the pendulum 15: first by a form lock of the first reel 12 in the background 14 with free-running second reel 13, then by a form lock of the second reel 13 in the background 14 with free-running first reel 12, finally by a form lock of the first reel 12 in the background 14 with free-running second reel 13.

The mass of the oscillating disc 15 allows a comparative reduction of the rotational motion produced in a particularly advantageous way.

The next operation of the force storage device is the operation of the described movement sequence of the elevator slides 3 and the jump slides 9 and the transfer of their linear movement by means of the rollers 12, 13 and the backdrop 14 to a rotation of the oscillating disk 15 in the other direction.

The conversion of the linear to a rotational motion described in the present invention gives rise to several advantages for the force storage device: first, it provides a simple variable translation; the torque is particularly high at the beginning and end of the operation of the load switch, if necessary; especially at the end of each switch, a high torque gain is important to ensure that the end of the force storage device is securely reached, it is reliably connected at this end and thus the load switch reaches its new stationary position after the switch.

The geometry of the backdrop 14 is also highly variable; the shape and distance of the inner contour 16 and the outer contour 17 can be varied in various ways, allowing the most varied switching procedures and operation sequences of the various load switches to be adapted.

Claims (5)

1. Energy accumulator for an on-load tap changer,

   - wherein a longitudinally movable lifting carriage connected to a drive shaft and a likewise longitudinally movable jumping carriage connected to a driven shaft are provided,

   - wherein at least one energy-accumulating spring is provided between the lifting carriage and the jumping carriage,

   - wherein the lifting carriage is movable in a linear manner in alternatively one of two opposed directions upon each switching of the on-load tap changer by the rotating drive shaft, such that the at least one energy-accumulating spring can be stressed,

   - wherein after reaching the new end position of the lifting carriage, the jumping carriage which until then is locked can be released such that it suddenly follows the movement of the lifting carriage,

   - and wherein the linear movement of the jumping carriage can be converted into a rotational movement of the driven shaft,

   characterised in that

   - two rollers (12, 13) are disposed on the side of the jumping carriage (9) facing the driven shaft, said rollers running in a rotatable connecting link (14) which faces towards them and which for its part is also connected to the driven shaft,

   - the connecting link (14) comprises an inner contour (16) and outer contour (17) such that during a first part of each movement of the jumping carriage (9) the first roller (12) is initially guided in a positive manner in the connecting link (14) and the second roller (13) is freely movable, during a second part of each movement of the jumping carriage (9) the second roller (13) which until then is freely movable is guided in a positive manner and the first roller (12) which until then is guided in a positive manner is freely movable and during a third part of each movement, in turn the first roller (12) which until then is freely movable is guided in a positive manner and the second roller (13) which until then is guided in a positive manner is freely movable.
2. Energy accumulator as claimed in claim 1, characterised in that the connecting link (14) comprises an at least approximately Y-shaped path, wherein the distance between the inner contour (16) and the outer contour (17) is constant in the region of the outer regions of the three limbs of the Y-shaped path and corresponds substantially to the diameter of the rollers (12, 13), and wherein the width of the connecting link (14) increases in the central region thereof such that one of the two rollers (12 or 13) is freely movable in this region.
3. Energy accumulator as claimed in claim 1 or 2, characterised in that an extension arm (11) which supports the two rollers (12, 13) is attached to the jumping carriage (9).
4. Energy accumulator as claimed in any one of claims 1 to 3, characterised in that the two rollers (12, 13) are disposed in a horizontal plane and in a line perpendicular to the direction of movement of the jumping carriage (9).
5. Energy accumulator as claimed in any one of claims 1 to 4, characterised in that the connecting link (14) is incorporated into a flywheel (15) which for its part is connected to the driven shaft.