Mobile coupling mechanism for external mechanical position indicator

Abstract

The present patent application relates to a mobile coupling mechanism of an external mechanical position indicator used in a load tap changer or OLTC (on load tap changer). The mobile, self-aligning coupling mechanism for actuating the mechanical position indicator eliminates the need for the operator to dismantle the mechanism for adjustments or maintenance, as well as performing self-adjustment between the actuating gears, absorbing small assembly deviations.

Description

MOBILE COUPLING MECHANISM OF THE EXTERNAL MECHANICAL POSITION INDICATOR Field of invention

[0001] This invention patent application concerns a mobile coupling mechanism for the external mechanical position indicator used in an on-load tap changer, with direct drive through gears, used to change taps of an electrical winding, without the need to disconnect them. Fundamentals of the invention

[0002] An On-Load Tap Changer (OLC), also known as a tap changer or On-Load Tap Changer (LTC), is a device that varies the turns ratio of a transformer or autotransformer winding, regulating the operating voltage. It is designed to change the tap position and vary the transformer or autotransformer's transformation ratio while it is energized and under load, performing this function without requiring an interruption to the power supply.

[0003] The mechanical position indicator is the most direct way to externalize the tap position (TAP) indication of the tap changer. In the state of the art, the indicator consists of a dial indicator installed externally on the transformer, with hands and markings that display the current tap changer position. The indicator is connected to a system consisting of flexible cables and gears or chains, connected directly to the CDC, transferring the CDC's movement to the position indicator. If there is a need to synchronize the tap position displayed by the position indicator and the CDC, disassembly will be necessary. partial replacement of the drive system by decoupling the CDC and indicator devices. The solution presented allows for position synchronization between devices without the need for disassembly, in addition to promoting self-adjustment between the drive gears, absorbing small assembly deviations. Brief description of the drawings

[0004] Figure 1 A is a front view of the assembled switch with a focus on viewing the movable coupling mechanism.

[0005] Figure 1B is an enlarged view of detail A of Figure 1A

[0006] Figure 2 is an exploded view of the top level of the switch assembly (100) showing all of its assemblies and individual parts.

[0007] Figure 3 is a perspective view of the fully assembled assembly (1 10).

[0008] Figure 4 is an exploded view of the assembly level (1 10) showing all of its assemblies and individual parts.

[0009] Figure 5 is a perspective view of gear (150).

[0010] Figure 6 is an exploded view of all parts of gear (150).

[0011] Figure 7 is a perspective view of gear (160).

[0012] Figure 8 is an exploded view of all parts of gear (160).

[0013] Figure 9 is a perspective view of the assembly (170).

[0014] Figure 10 is an exploded view of the engine assembly (170) showing all of its individual parts.

[0015] Figure 11 is a perspective view of the top of the assembled resistive divider (180).

[0016] Figure 12 is a perspective view of the bottom of the assembled resistive divider (180).

[0017] Figure 13 is a perspective view of the fully assembled assembly (190).

[0018] Figure 14 is an exploded view of the assembly (190) showing all of its individual parts.

[0019] Figure 15 is a perspective view of the fully assembled terminal strip (200).

[0020] Figure 16 is an exploded view of the terminal strip (200) showing all of its individual parts.

[0021] Figure 17 A is an exploded view of the mobile assembly (130) showing, focusing on the front, all of its assemblies and individual parts.

[0022] Figure 18 B is an exploded view of the mobile assembly (130) showing, focusing on the rear part, all of its assemblies and individual parts.

[0023] Figure 19 is an exploded view of assembly (280) showing all of its assemblies and individual parts.

[0024] Figure 19 is an exploded view of the brushes (300) showing all of its individual parts.

[0025] Figure 20 is an exploded view of the brushes (310) showing all of its individual parts.

[0026] Figure 21 is an exploded view of assembly (290) showing all of its assemblies and individual parts.

[0027] Figure 22 is an exploded view of the brushes (320) showing all of their individual parts.

[0028] Figure 23 is an exploded view of the brushes (330) showing all of their individual parts.

[0029] Figure 24 A is a perspective view of the front of the assembly (140).

[0030] Figure 24B is a perspective view of the rear of the assembly (140).

[0031] Figure 25 A is an exploded view of the drive assembly (140) showing, with a focus on the rear, all of its assemblies and individual parts.

[0032] Figure 25 B is an exploded view of the drive assembly (140) showing, with a focus on the front, all of its assemblies and individual parts.

[0033] Figure 26A is a perspective view of the bottom of the Rotor (340).

[0034] Figure 26B is a perspective view of the top of the Rotor (340).

[0035] Figure 27 is a front view of the Mechanical Indicator (350). Description of the invention

[0036] The present invention relates to a mobile coupling mechanism of the external mechanical position indicator (360) used in a tap changer (100) comprising: a set (130); a set (140); • a set (150); • set (190); • gear (150.1 ) • pin / roller (150.12); • fittings (140.1 a - r); • a Genoa wheel (140.1); • a coil spring system (110.36 a - b); and • items (190.6) and (140.2);

[0037] Referring to Figures 1 A and 1 B, a switch (100) comprising a base assembly (110), a movable assembly (130) and a drive assembly (140) can be visualized.

[0038] With reference to Figure 2, the commutator (100) comprises the holes (100.4 a - c) of the item (100.3) which are housed in the holes (100.9) of the assembly (110); the shaft (100.6) of the assembly (130) is housed in the hole (100.7) of the assembly (110); the key (100.10) is housed in the slot (100.11) of the shaft (100.6); the hole (100.13) of the hub (100.12) is housed in the shaft (100.6) of the assembly (130); the stud screw (100.14) is fixed in the hole (100.15) of the hub (100.12); the holes (100.16) of the assembly (140) are concentric with the holes (100.17 a - c) of the hub (100.12); fastening elements and assembly (140) are fixed in the holes (100.17 a - c) of the hub (100.12); the hole (100.22) of the item (100.21) is housed in the rod (100.20) of the item (100.18)

[0039] With reference to Figures 3 and 4, item (110.1 ) is the basis for fixing the assemblies and unitary items; the diameter (110.3) of the bushing (110.2) is housed in the hole (1 10.4) of item (110.1); the elastic pins (110.5 a - b) are fixed in a hole in the sf (front surface) of item (110.1); the holes (110.7) of item (110.6) are fixed in a hole in the front surface of item (110.1); the hole (110.11 ) of item (1 10.9) and spacer (110.10) are housed in the threaded shaft (110.8), subsequently the threaded shaft (110.8) is fixed in the front surface of item (110.1); are housed in the threaded shafts (110.12 to - b) torsion springs (110.13 a - b) and disc springs (1 10.14 a - b), then threaded shafts (110.12 a - b) are fixed to the front surface of the item (110.1 ); microswitches (110.15 a - b), spacers (110.16) and fastening elements are fixed in holes of the front surface of the item (110.1); microswitch (1 10.17 d), spacers (110.16) and fastening elements are fixed in holes of the front surface of the item (110.1); microswitches (110.17 a - c), spacers (1 10.18 a - f) and fastening elements are fixed in holes of the front surface of the item (110.1 ); microswitches (110.19 a - c), spacers (110.16) and fasteners are fixed in holes of the front surface of item (110.1); shaft 1 10.21 and fasteners fixed in holes of the front surface in item (110.1); item (110.23) is housed in diameter (110.22) of shaft (110.21); assembly (150) is housed in diameter (110.22) of shaft (110.21); snap ring (110.25) is housed in channel (110.24) of shaft (110.21); the axis. (110.26) and fasteners are fixed in holes in the front surface of item (110.1); the assembly (160) is housed in the diameter (110.27) of the shaft (110.26); the snap ring (110.29) is housed in the groove (1 10.28) of the shaft (110.26); assembly (170) and fasteners are fastened in holes in the sp (back surface) of item (1 10.1); resistor (110.31) and fasteners are fastened in holes in the front surface of item (110.1 ); assembly (180), item (110.33) and fasteners are fastened in holes in the front surface of item (110.1 ); shafts (110.35 a - b) are housed in holes (110.34 a - b) of assembly (190). springs (110.36 a - b) are housed in shafts (110.35 a - b) and fasteners are fastened in holes in the front surface of item (110.1); items (1 10.37), (1 10.38) and fasteners are fixed in holes in the front surface of item (110.1); items (110.39) and fasteners are fixed in holes in the front surface of item (110.1).

[0040] Referring to Figures 5 and 6, the gear (150.1) is the base for assembling the other components that form the set (150). The diameters (150.5 a - b) of the bushings (150.4 a - b) are housed in the bore (150.2) of the gear (150.1); the diameter (150.9) of the pin (150.8) is housed in the hole (150.7) of the roller (150.6); the diameter (150.9) of the pin (150.8) is housed in the hole (150.3) of the gear (150.1); the snap ring (150.11) is housed in the slot (150.10) of the pin (150.8).

[0041] With reference to Figures 7 and 8, the gear (160.1) is the base for assembling the other components that form the set (160). The diameters (160.4 a - b) of the bushing (160.3 a - b) are housed in the hole (160.2) of the gear (160.1).

[0042] With reference to Figures 9 and 10, the motor (170.1) is the base for assembling the other components that form the set (170). The diameter (170.3) of the spacer (170.4) is housed in the shaft (170.2) of the motor (170.1); the key (170.5) is housed in the slot (170.6) of the shaft (170.2) of the motor (170.1); the hole (170.8) of the gear (170.7) is housed in the shaft (170.2) of the motor (170.1); the hole (170.10) of the item (170.9) is housed in the shaft (170.2) of the motor (170.1); the item (170.11 ) is coincident and concentric with the item (170.9); the hole (170.12) of the item (170.11) and hole (170.13) of the shaft (170.2) of the motor (170.1) are concentric, fastening elements and item (170.11 ) are fixed in the hole (170.13) of the shaft (170.2) of the motor (170.1).

[0043] Referring to Figures 13 and 14, the bearing (190.1) is the base for assembling the other components that form the set (190). The diameters (190.4 a - b) of the bushings (190.3 a - b) are housed in the hole (190.2) of the bearing (190.1); the diameter (190.7) of the pinion (190.6) is housed in the holes (190.5 a - b) of the bushings (190.3 a - b); the snap ring (190.9) is housed in the slot (190.8) of the pinion (190.6).

[0044] With reference to Figures 15 and 16, the ruler (200.1) is the base for assembling the other components that make up the set; holes (200.2 a - b) of item (200.1), holes (200.4 a - b) of plate (200.3), holes (200.6 a - b) of terminals (200.5 a - b) and holes (200.8 a - b) of terminals (200.7 a - b) are concentric; terminals (200.7 a - b), terminals (200.5 a - b) and sheet (200.3) are riveted with rivets (200.9 a - b) in the holes (200.2 a - b) of item (200.1); holes (200.2 c - m) of item (200.1 ) and hole (200.6 c - m) of the terminals (200.5 c - m) are concentric; the terminals (200.6 c - m) are riveted with rivets (200.9 c - m) in the holes (200.2 c - m) of the item (200.1).

[0045] With reference to Figures 17 A and 17 B, item (130.1) is the base for assembling the other components that form the set (130). The shaft (130.4) of item (130.3) is housed in the hole (130.2) of item (130.1). The hole (130.7) of item (130.4), hole (130.8) of item (130.5), hole (130.9) of item (130.6), hole (130.10) of item (130.1) and hole (130.12) of item (130.11) are concentric, fastening elements and items (130.3), (130.5), (130.6) and (130.11) are fixed in the holes (130.10) of item (130.1). The bore (130.13) of shaft (130.13) and bore (130.15) of item (130.6) are concentric. The fasteners and shaft (130.13) are fixed in the bores (130.15) of item (130.6). The bore (130.17) of item (130.16) is housed in the bore (130.18) of item (130.1). The bore (130.20) of ring (130.19) and bore (130.21) of item (130.1) are concentric. The fasteners and ring (130.19) are fixed in the bores (130.21 ) of item (130.1). The bore (130.23) of roller (130.22), bore (130.25) of spacers (130.24) and hole (130.26) of the item. (130.1) are concentric, fasteners, roller (130.22) and spacers (130.24) are fixed in hole (130.26) of item (130.1). Hole (130.27) of assembly (280) and hole (130.28) of item (130.5) are concentric. Fasteners and assembly (280) are fixed in holes (130.28) of item (130.5). Hole (130.29) of assembly (280) and hole (130.30) of item (130.1) are concentric. The fastening elements and assembly (280) are fixed in the holes (130.30) of item (130.1 ). The hole (130.31 ) of assembly (290) and hole (130.32) of item (130.19) are concentric. The fastening elements and assembly (290) are fixed in the holes (130.32) of item (130.19). The hole (130.33) of assembly (290) and (130.34) of item (130.1) are concentric. The fastening elements and assembly (290) are fixed in the holes (130.34) of item (130.1 ).

[0046] With reference to Figure 18, item (280.1) is the basis for assembling the other components that make up the set (280). The hole (280.2) of item (280.1), hole (280.4 a) of item (280.3 a), hole (280.5 a) of assembly (310), hole (280.7 a) of item (280.6 a), hole (280.9 a) of item (280.8 a), hole (280.4 b) of item (280.3 b), hole (280.5 b) of assembly (300), hole (280.7 b) of item (280.6 b) and hole (280.9 b) of item (280.8 b) are concentric, fastening elements, items (280.3 a - b), (280.6 a - b), (280.8 a - b) and assemblies (300) and (310) are fixed in the hole (280.2) of item (280.1).

[0047] With reference to Figure 19, item (300.1) is the base for assembling the other components that form the set (300). The hole (300.4) of item (300.3), hole (300.6) of item (300.5) and hole (300.7) of item (300.6) are housed in the pins (300.2) of item (300.1). The pins (300.2) are riveted.

[0048] With reference to Figure 20, item (310.1) is the base for assembling the other components that form the set (310). The hole (310.4) of item (310.3), hole (310.6) of item (310.5) and hole (310.8) of item (310.7) are housed in the pins (310.2) of item (310.1). The pins (310.2) are riveted.

[0049] With reference to Figure 21 , item (290.1) is the base for assembling the other components that form the assembly (290). The hole (290.2) of item (290.1), hole (290.4 a) of item (290.3 a), hole (290.5 a) of assembly (330), hole (290.7 a) of item (290.6 a), hole (290.9 a) of item (290.8 a), hole (290.4 b) of item (290.3 b), hole (290.5 b) of assembly (320), hole (290.7 b) of item (290.6 b) and hole (290.9 b) of item (290.8 b) are concentric. The fasteners, items (290.3 a - b), (290.6 a - b), (290.8 a - b) and assemblies (320) and (330) are fixed in the hole (290.2) of the item (290.1).

[0050] With reference to Figure 22, item (320.1) is the basis for assembling the other components that form the set (320). The hole (320.4) of item (320.3), hole (320.6) of item (320.5) and hole (320.7) of item (320.6) are housed in pins (320.2) of item (320.1). Pins (320.2) are riveted.

[0051] With reference to Figure 23, item (330.1) is the base for assembling the other components that form the set (330). The hole (330.4) of item (330.3), hole (330.6) of item (330.5) and hole (330.8) of item (330.7) are housed in the pins (330.2) of item (330.1). The pins (330.2) are riveted.

[0052] With reference to Figures 24 A, 24 b, 25 A and 25 B, item (140.1 ) is the basis for assembling the other components that form the set (140). The holes (140.4 a - d) of item (140.1) and hole (140.5 a - d) of item (140.2) are concentric. Fasteners and item (140.2) are fixed in holes (140.4 a - d) of item (140.1o. Holes (140.7 a - b) of assembly (340) and holes (140.6 a - b) are concentric. Fasteners and assembly (340) are fixed in holes (140.6 a - b) of item (140.1). Holes (140.9 a - b) of item (140.3) and hole (140.8 a - b) of item (140.1) are concentric.

[0053] The control device, upon detecting a voltage variation in the line, sends the necessary signal for the switch (100) to change the tap in order to regulate the line voltage. The switching direction can be to increase or decrease and is defined by the direction of rotation that the control device commands to the motor (170). The shaft (170.6) of the motor (170) is coupled to the gear (170.8) that moves a rotation amplifier system composed of the gears (160) and (150). The gear (150) has in its body a pin / roller (150.12) that acts as a driver for the genoa wheel (140.1).

[0054] The genoa wheel (140.1) of the assembly (140) is driven as the gear (150) rotates and the pin / roller (150.12) comes into contact with the fittings (140.1 a - r) when the pin / roller (150.12) is no longer in contact with the fittings (140.1 a - r) of the genoa wheel (140.1), the item (150.13) of the gear (150) supports the genoa wheel (140.1) in its fittings (140.2 a - r). Each complete rotation of the gear (150) results in a drive cycle.

[0055] The genoa wheel (140.1) of the assembly (140) acts as a coupling between the movement of the motor transmission (170) and the movement of the assembly (130). The assemblies (140) and (130) have coupled shafts so that when the gear (150) makes a complete turn, the assembly (130) has a given rotation angle. This rotation angle causes the brushes of the moving contacts (280) and (290) to move and alternate between the fixed contacts, thus enabling different combinations of positions. This allows the taps to alternate according to the voltage variation readings that the control device performs on the line.

[0056] During the transition movement of the taps, there is movement of the gear (140.2) of the assembly (140). The pinion (190.6) is engaged with the gear (140.2). The bearing (190.1) supports the shaft (190.7) of the pinion (190.6). In this way, the assembly (190) is able to transfer the movement of the internal mechanism of the switch (100) to the external position indicator, moving the pointer (350.2) of the indicator (350), as can be seen in figure 37, in which the term "INST" refers to the instantaneous indication of the position. As shown in figure 36 b, the helical springs (1 10.36 a - b) play the role of keeping the assemblies (190) and (140) coupled. This coupling occurs through the continuous contact generated by the springs (110.36 a - b) between the gears (360.1) and (140.2).

[0057] The use of helical springs (110.36 a - b) makes it possible to couple and uncouple the assemblies (190) and (140) manually, enabling adjustments without the need for disassembly. It also allows for the absorption of small assembly deviations and dimensions of the parts, promoting self-adjustment between the gears. The synchronization between the position indicator and the current position of the tap changer (100) is essential for the operator during switching operations, removal and commissioning of the transformer, and during inspections to validate the correct operation of the transformer and its control devices, since, together with other indications, it provides the operator with security regarding the position of the CDC. In the state of the art, the coupling mechanism is designed in such a way that partial disassembly of the system is necessary to perform position synchronization between the CDC and the indicator. The helical springs (110.36 a - b) allow the maintainer to simply manually exert force on the assembly (190) to disengage the items (360.1) and (140.2), turning the shaft of the assembly (190) in order to synchronize the indication of the pointer (350.2) with the current tap of the switch (100) and re-engage items (360.1) and (140.2) with the mechanism properly synchronized.

[0058] To support the operator by providing redundancy in confirming the current position, tap, the CDC is equipped with a resistive sensor that provides the control devices with an electrical signal that allows the identification of the current position, the position sensor, which is composed of the resistive divider (180) and the rotor (340). The rotor (340) is coupled to the Genova wheel (140.1) so that, during a drive cycle, the pin (340.2 b) moves and alternates between the contacts (180.2 a - q). Meanwhile, the pin (340.2 a) always moves in contact with the conductive track. (180.3). Each combination of the pin (340.2 b) with the respective contact (180.2 a - q) results in different levels of electrical resistance, allowing the control devices to identify and display the current position of the CDC to the operator.

[0059] Thus, a person skilled in the art, when faced with the switch (100) of the present invention, understands that the advantages compared to the state of the art are: - self-adjustment between the drive gears, absorbing small assembly deviations. - possibility of synchronizing the switch position with the external position indicator without the need for total or partial disassembly of the mechanism. Conclusion

[0060] As can be inferred from the description above, the switch (100) of the present invention surpasses state-of-the-art solutions, presenting advantages over state-of-the-art switches, perfectly susceptible to industrial application, which presents a new arrangement, involving inventive activity and resulting in functional improvement in its use.

Claims

CLAIMS 1. MOBILE COUPLING MECHANISM OF THE EXTERNAL MECHANICAL POSITION INDICATOR (360) used in a switch characterized by comprising: • a set (130); • a set (140); • a set (150); • set (190); • gear (150.1 ) • pin / roller (150.12); • fittings (140.1 a - r); • a Genoa wheel (140.1); • a coil spring system (1 10.36 a - b); and • items (190.6) and (140.2); 2. Mechanism, according to claim 1, characterized in that the genoa wheel (140.1) of the assembly (140) is driven as the gear (150.1) rotates and a pin / roller (150.12) comes into contact with fittings (140.1 a - r).

3. Mechanism, according to claim 2, characterized in that the assembly (130) and the assembly (140) have coupled shafts in such a way that when a gear (150) completes a revolution, there is an actuation cycle.

4. Mechanism, according to claim 1, characterized by the fact that it uses a system of helical springs to support the assembly (190) to have a mobile and self-adjusting coupling between the items (190.6) and (140.2).

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