CN112259389A - Operating mechanism of one-way on-load tap-changer - Google Patents
Operating mechanism of one-way on-load tap-changer Download PDFInfo
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- CN112259389A CN112259389A CN202011098480.1A CN202011098480A CN112259389A CN 112259389 A CN112259389 A CN 112259389A CN 202011098480 A CN202011098480 A CN 202011098480A CN 112259389 A CN112259389 A CN 112259389A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/38—Driving mechanisms, i.e. for transmitting driving force to the contacts using spring or other flexible shaft coupling
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Abstract
The invention discloses an operating mechanism of a one-way on-load tap-changer. The input assembly comprises an input gear and an output gear, the input gear is driven by external force to rotate, the input gear is connected with the output gear through a same-direction transmission path and a reverse transmission path, when the rotation direction of the input gear is the same as that of the output gear, the input gear drives the output gear to rotate through the same-direction transmission path, when the rotation direction of the input gear is reverse to that of the output gear, the input gear drives the output gear to rotate through the reverse transmission path, and the output gear always rotates in the same direction. An energy storage assembly including a spring and a positioning device is connected to the input assembly. The output assembly is connected to the energy storage assembly. The output gear of the input assembly rotates to drive the energy storage assembly to act, the positioning device is located at a locking position, the spring of the energy storage assembly stores energy, the output assembly is locked, the output gear rotates to a releasing position, the positioning device releases to unlock the output assembly, and the spring of the energy storage assembly releases energy to drive the output assembly to rotate.
Description
Technical Field
The invention relates to the field of power equipment, in particular to an operating mechanism of an on-load tap-changer.
Background
On-load tap changers require switching between different winding taps. The operating mechanism is used for driving the on-load tap-changer to change. The traditional combined on-load tap-changer operating mechanisms are gun bolt releasing mechanisms, and the operation characteristics of the traditional combined on-load tap-changer operating mechanisms are that the operation direction of an output assembly is bidirectional rotation, namely, back-and-forth rotation. The bolt release mechanism is divided into an eccentric wheel type and a slider-crank type according to different motion modes, the eccentric wheel type and the slider-crank type have the common characteristic, and the output rotates back and forth no matter what the input direction is. The structure principle of the bolt releasing mechanism in the transmission technology is described below by taking an eccentric wheel type structure as an example.
Fig. 1a and 1b disclose a schematic diagram of an over-center wheel bolt release mechanism as used in the prior art. Wherein fig. 1a discloses the cross-sectional operating principle of an over-center wheel bolt release mechanism and fig. 1b discloses the top operating principle of an over-center wheel bolt release mechanism. It should be noted that fig. 1a and 1b are schematic diagrams, and thus, the structure is abstracted, only components related to the operation principle are shown, and the rest of the components are hidden. The components shown in fig. 1a and 1b are different from each other at different viewing angles.
Referring to fig. 1a and 1b, an over-center wheel bolt release mechanism includes: an eccentric wheel 101, an upper slide box 102, a lower slide box 103, a cam plate 104, a claw 105, an energy storage spring 106, a return spring 107, a slide rail 108, a slider 109, a guide rail 110, a bracket 111, a stopper 112, a rotating shaft 113 and a buffer 114. A guide rail 110 is arranged between the upper slide box 102 and the lower slide box 103, and an energy storage spring 106 is arranged on the guide rail 110 between the upper slide box and the lower slide box. The eccentric wheel 101 is connected to a rotating shaft 113, the rotating shaft 113 is an input shaft, and the rotating shaft 113 is driven to rotate to drive the eccentric wheel 101 to rotate. The upper sliding box 102 is provided with a stop block 112, and when the eccentric wheel 101 rotates, the stop block 112 is pushed, and the upper sliding box 102 is driven to move through the stop block 112. The cam plate 104 is connected to the lower slide case 103, and the circular arc surface of the cam plate 104 has a step surface by which the pawl 105 can lock the cam plate 104. When the pawl 105 locks the cam plate 104, the position of the lower slide cassette 103 is also locked. The eccentric wheel bolt release mechanism is integrally mounted on the bracket 111. When the eccentric wheel 101 rotates, the upper slide case 102 is moved along the guide rail 110. Since the pawl 105 locks the cam plate 104 at this time so that the lower slide case 103 is kept stationary at the original position, the upper slide case 102 and the lower slide case 103 undergo relative movement, which compresses the energy storage spring 106 between the upper and lower slide cases. When the eccentric 101 rotates and moves the upper slide case 102 to the release position, a side arm 121 (shown in fig. 2) on the upper slide case 102 pushes the pawl 105 so that the pawl 105 moves away from the step surface on the cam plate 104. When the pawl 105 no longer locks the cam plate 104, the lower slide box 103 is released. At this time, the energy storage spring 106 releases energy to drive the lower slide box 103 to move and the cam plate 104 to rotate. Referring to fig. 1b, the rotated position of the cam plate 104 is provided with a damper 114. The damper 114 can reduce the impact of each operation of the cam plate 104 and the lower slide case 103, and prolong the mechanical life. After the releasing action is finished, the claw 105 on the other side catches the step surface on the other side on the cam plate 104 under the action of the return spring 107. The downslide cartridge 103 and cam plate 104 are locked again and the entire over-center bolt release mechanism returns to its original state ready for the next action. Referring to fig. 1b, it can be seen that the cam disc 104 is caught from the other side by the catch 105 after one motion is completed, so that the cam disc 104 will rotate in the opposite direction in the next motion. That is, the cam plate 104 will change direction of rotation to rotate back and forth after each actuation. Therefore, the cam plate as the output always rotates back and forth no matter the input rotating shaft rotates clockwise or counterclockwise.
Fig. 2 discloses a block diagram of an over-center wheel bolt release mechanism as used in the prior art. Fig. 2 is one specific implementation of the principle of the over-center wheel bolt release mechanism shown in fig. 1a and 1 b. In fig. 2, the eccentric 101, the upper slide cassette 102, the lower slide cassette 103, the cam plate 104, the pawl 105, the guide rail 110, the bracket 111, the stop 112, the rotation shaft 113 and the side arm 121 on the upper slide cassette 102 are disclosed.
The reciprocating release mechanism is capable of providing a unidirectional rotational output. Figures 3a and 3b disclose a schematic diagram of a reciprocating release mechanism. The basic components of the reciprocating release mechanism include a tension spring S and a rotatable crank arm R. One end of a tension spring with strong tension is fixed on a point B on the crank arm, and the other end of the tension spring is fixed on a fixed point C. The crank arm rotates around the circle center A. When the crank arm is rotated to the position farthest from the fixed point C, it is the position of the dead point D. When the crank arm is at the initial position, the crank arm is located at the position closest to the fixed point C, the tension spring is in a natural state at the moment, and the tension spring does not store energy. Under the drive of external force, the crank arm rotates clockwise at an angular velocity omega, and the angular velocity omega is a drive angular velocity and is a relatively low rotating speed. Before the crank arm rotates to reach the dead point D, the tension spring is gradually stretched to store energy. Referring to fig. 3b, after the crank arm rotates to reach and cross the dead point D, the tension spring is released, and the tension spring contracts to release energy, so that the crank arm is driven to rotate clockwise at a high angular velocity ω 1 (the releasing direction is the same as the energy storing direction). The angular velocity omega 1 is converted angular velocity, the angular velocity omega 1 is converted by utilizing the energy released by the tension spring, and the groove shifting piece drives the grooved wheel to drive the main shaft of the on-load tap-changer to complete primary conversion. In the reciprocating release mechanism shown in fig. 3a and 3b, the rotation direction of the output component, i.e. the crank arm, is always the same direction, and the crank arm respectively stores and releases energy at different stages of each rotation, so that unidirectional rotation output is realized.
Disclosure of Invention
The invention provides an operating mechanism of a one-way on-load tap-changer, which is matched with a reciprocating release mechanism to realize one-way output.
According to an embodiment of the present invention, there is provided an operating mechanism of a one-way on-load tap changer, including: input assembly, energy storage component and output assembly. The input assembly comprises an input gear and an output gear, the input gear is driven by external force to rotate, the input gear is connected with the output gear through a same-direction transmission path and a reverse transmission path, when the rotation direction of the input gear is the same as that of the output gear, the input gear drives the output gear to rotate through the same-direction transmission path, when the rotation direction of the input gear is reverse to that of the output gear, the input gear drives the output gear to rotate through the reverse transmission path, and the output gear always rotates in the same direction. An energy storage assembly is connected to the input assembly, the energy storage assembly including a spring and a positioning device. The output assembly is connected to the energy storage assembly. The output gear of the input assembly rotates to drive the energy storage assembly to act, the positioning device is located at a locking position, the spring of the energy storage assembly stores energy, the output assembly is locked, the output gear rotates to a releasing position, the positioning device releases to unlock the output assembly, the spring of the energy storage assembly releases energy to drive the output assembly to rotate, the output assembly rotates to the next locking position, and the positioning device locks the output assembly again.
In one embodiment, the co-rotating drive path of the input assembly includes a co-rotating drive shaft and a co-rotating overrunning clutch, the input gear is connected to the co-rotating drive shaft, the co-rotating overrunning clutch is mounted on the co-rotating drive shaft, and the output gear is connected to the co-rotating overrunning clutch. When the rotation direction of the input gear is the same as that of the output gear, the homodromous overrunning clutch is meshed with the homodromous transmission shaft, the input gear drives the output gear to rotate in the same direction through the homodromous transmission shaft and the homodromous overrunning clutch, and when the rotation direction of the input gear is opposite to that of the output gear, the homodromous overrunning clutch is sleeved with the homodromous transmission shaft in a hollow way.
In one embodiment, the reverse drive path of the input assembly includes a first transition gear, a second transition gear, a third transition gear, a reverse drive shaft, and a reverse overrunning clutch, the input gear being in engagement with the first transition gear, the first transition gear being connected to the reverse overrunning clutch, the reverse overrunning clutch being mounted on the reverse drive shaft, the reverse drive shaft being connected to the second transition gear, the second transition gear being in engagement with the third transition gear, the third transition gear being in engagement with the output gear. When the rotation direction of the input gear is opposite to that of the output gear, the output gear drives the first transition gear to rotate, the reverse overrunning clutch is meshed with the reverse transmission shaft, the first transition gear drives the reverse transmission shaft to rotate through the reverse overrunning clutch, the reverse transmission shaft drives the second transition gear to rotate, the second transition gear drives the third transition gear to rotate, the third transition gear drives the output gear to rotate, the rotation direction of the output gear is opposite to that of the input gear, and when the rotation direction of the input gear is the same as that of the output gear, the reverse overrunning clutch and the reverse transmission shaft are in an empty sleeve.
In one embodiment, the energy storage assembly comprises: crank pivot, connecting rod, slide bar, slider and spring. The crank rotating shaft is connected with the output gear, the crank rotating shaft rotates along with the output gear, the connecting rod is installed on the crank rotating shaft, the sliding block is installed at the end portion of the connecting rod in a rotating mode, the sliding block is sleeved on the sliding rod and can slide along the sliding rod, and the spring is installed on the sliding rod. The output gear rotates to drive the crank rotating shaft to rotate, the crank rotating shaft drives the connecting rod and drives the sliding block to slide along the sliding rod through the connecting rod, and when the positioning device is located at the locking position, the sliding block pushes the spring to compress, and the spring stores energy.
In one embodiment, the output assembly is an output rotary disc, the sliding rod is mounted on the output rotary disc, when the positioning device is located at the locking position, the output assembly is locked, the spring stores energy, the positioning device is released, the output rotary disc is unlocked, and the spring releases energy to drive the output rotary disc to rotate.
In one embodiment, the positioning device of the energy storage assembly comprises a bolt, a roller and a positioning groove, the bolt is installed on the output rotary table, the positioning groove is formed in the rack of the operating mechanism, the roller is installed on the crank rotating shaft, the bolt is inserted into one positioning groove, the positioning device is located at the locking position, the output rotary table is locked, the output gear drives the crank rotating shaft to rotate to the releasing position, the roller pushes the bolt to exit from the positioning groove, the positioning device releases to unlock the output rotary table, the spring releases energy to drive the output rotary table to rotate, the bolt rotates along with the output rotary table and is inserted into the next positioning groove, and the positioning device locks the.
In one embodiment, the output assembly further comprises a buffer device, the buffer device comprises a damping member and a blocking block, the damping member is mounted on the output rotary disc and rotates along with the output rotary disc, the blocking block is mounted on a frame of the operating mechanism, the damping member is in contact with the blocking block before the output rotary disc rotates to a next locking position, and the damping member enables the rotating speed of the output rotary disc to be reduced.
In one embodiment, the frame of the operating mechanism comprises a lower bracket and an upper bracket, the input assembly is mounted on the lower bracket and distributed on two sides of the lower bracket, and the energy storage assembly and the output assembly are mounted between the lower bracket and the upper bracket.
In one embodiment, the blocking piece and the positioning groove are arranged on the upper bracket, and the plurality of blocking pieces and the plurality of positioning grooves are arranged to be evenly distributed along the circumference.
The operating mechanism of the one-way on-load tap-changer has the following characteristics and advantages: the overrunning clutch forms a homodromous transmission path and a reverse transmission path, so that the output gear always outputs rotation in a single direction no matter the input gear rotates clockwise or anticlockwise in the input assembly. The energy storage of the spring is realized by using a connecting rod mechanism formed by the crank rotating shaft and the sliding block, and the input of a large rotating angle can be realized. A plurality of damping and buffering devices are arranged to reduce the impact of the output turntable on the mechanism and prolong the mechanical life of the operating mechanism.
Drawings
Fig. 1a and 1b disclose a schematic diagram of an over-center wheel bolt release mechanism as used in the prior art.
Fig. 2 discloses a block diagram of an over-center wheel bolt release mechanism as used in the prior art.
Figures 3a and 3b disclose a schematic diagram of a reciprocating release mechanism.
Fig. 4 discloses a schematic diagram of an input assembly in an operating mechanism of a one-way on-load tap changer according to an embodiment of the present invention.
Fig. 5a, 5b and 5c disclose a schematic diagram of the energy storage assembly in the operating mechanism of a unidirectional on-load tap changer according to an embodiment of the present invention.
Fig. 6a and 6b disclose exploded construction views of the operating mechanism of a one-way on-load tap changer according to an embodiment of the invention.
Fig. 7a and 7b disclose combined construction diagrams of the operating mechanism of a one-way on-load tap changer according to an embodiment of the invention.
Detailed Description
The invention provides an operating mechanism of a one-way on-load tap-changer, which comprises an input assembly, an energy storage assembly and an output assembly. The input assembly comprises an input gear and an output gear, the input gear is driven by external force to rotate, the input gear is connected with the output gear through a same-direction transmission path and a reverse transmission path, when the rotation direction of the input gear is the same as that of the output gear, the input gear drives the output gear to rotate through the same-direction transmission path, when the rotation direction of the input gear is reverse to that of the output gear, the input gear drives the output gear to rotate through the reverse transmission path, and the output gear always rotates in the same direction. An energy storage assembly is connected to the input assembly, the energy storage assembly including a spring and a positioning device. The output assembly is connected to the energy storage assembly. The output gear of the input assembly rotates to drive the energy storage assembly to act, the positioning device is located at a locking position, the spring of the energy storage assembly stores energy, the output assembly is locked, the output gear rotates to a releasing position, the positioning device releases energy to unlock the output assembly, the spring of the energy storage assembly releases energy to drive the output assembly to rotate, the output assembly rotates to the next locking position, and the positioning device locks the output assembly again.
In the following description, the terms "in-direction" and "reverse direction" will be used. In this context, the definitions of "same direction" and "reverse direction" only refer to the relative rotation directions of the input gear and the output gear, and the same direction transmission shaft, the reverse direction transmission shaft, the same direction overrunning clutch and the reverse direction overrunning clutch are divided according to the names of transmission paths, and do not limit the actual rotation directions.
The input assembly in the operating mechanism of the one-way on-load tap-changer is of a one-way output structure and comprises an input gear and an output gear, wherein the input gear is driven by external force to rotate, and the input gear is connected with the output gear through a same-direction transmission path and a reverse-direction transmission path. When the rotation direction of the input gear is the same as that of the output gear, the input gear drives the output gear to rotate through the same-direction transmission path, and when the rotation direction of the input gear is the reverse direction of that of the output gear, the input gear drives the output gear to rotate through the reverse transmission path. So that the output gear always rotates in the same direction. Fig. 4 discloses a schematic diagram of an input assembly in an operating mechanism of a one-way on-load tap changer according to an embodiment of the present invention.
The co-rotating drive path of the input assembly includes a co-rotating drive shaft 402 and a co-rotating overrunning clutch 403. The input gear 401 is connected to a co-rotating shaft 402, a co-rotating overrunning clutch 403 is mounted on the co-rotating shaft 402, and the output gear 404 is connected to the co-rotating overrunning clutch 403. The output gear 404 is configured to rotate in a single direction to output, and the output rotation direction of the output gear 404 is fixed to be clockwise or counterclockwise according to different application requirements. When the direction of rotation of the output gear 404 is determined, the direction of rotation of the input gear is the same as the output gear and is referred to as "the same direction", and vice versa. When the rotation direction of the input gear 401 is the same as that of the output gear 404, the same-direction overrunning clutch 403 is meshed with the same-direction transmission shaft 402, and the input gear 401 drives the output gear 404 to rotate in the same direction through the same-direction transmission shaft 402 and the same-direction overrunning clutch 403. When the rotation direction of the input gear 401 is reverse to that of the output gear 404, the overrunning clutch 403 and the coaxial transmission shaft 402 are idle, and when the overrunning clutch and the coaxial transmission shaft are idle, the power transmission is not performed in the coaxial transmission path.
The reverse drive path of the input assembly includes a first transition gear 405, a second transition gear 408, a third transition gear 409, a reverse drive shaft 407, and a reverse overrunning clutch 406. The input gear 401 meshes with a first transition gear 405. The first transition gear 405 is connected to a reverse overrunning clutch 406, and the reverse overrunning clutch 406 is mounted on a reverse drive shaft 407. The counter drive shaft 407 is connected to a second transition gear 408, the second transition gear 408 meshing with a third transition gear 409, the third transition gear 409 meshing with the output gear 404. When the rotation direction of the input gear 401 is opposite to that of the output gear 404, the homodromous transmission path is in an empty state and power transmission is not performed. At this time, the output gear 401 drives the first transition gear 405 to rotate, and the reverse overrunning clutch 406 is engaged with the reverse transmission shaft 407. The first transition gear drives the reverse transmission shaft 407 to rotate through the reverse overrunning clutch 506 via 405. The reverse transmission shaft 407 drives the second transition gear 408 to rotate, and the second transition gear 408 drives the third transition gear 408 to rotate. The third transition gear 409 rotates the output gear 404. The direction of rotation of the output gear 404 is counter to the direction of rotation of the input gear 401 by successive gear mesh reversals and transfers. When the input gear 401 rotates in the same direction as the output gear 404, the reverse overrunning clutch 406 is free from the reverse transmission shaft 407. At this time, although the input gear 401 drives the first transition gear 405 to rotate, the reverse overrunning clutch 406 and the reverse transmission shaft 407 are empty, so that the rotation is not transmitted to the second transition gear 408, and the reverse transmission path does not transmit power. At this time, the same-direction transmission path is in a working state, and power transmission is performed.
Through setting up syntropy transfer path and reverse transfer path for when the direction of rotation of input gear and output gear syntropy or reverse, syntropy transfer path and reverse transfer path alternate work, ensure that output gear rotates output with single direction all the time. In the embodiment shown in fig. 4, the gears are respectively disposed at two sides of the frame 410, the same-direction transmission shaft 402 and the reverse-direction transmission shaft 407 pass through the frame 410 to realize the linkage of the gears, and a bearing 411 is disposed at a position where the transmission shaft passes through the frame. The gear is also provided with a bearing at the position where the gear is arranged on the frame, and the gear rotates through the bearing.
Fig. 5a, 5b and 5c disclose a schematic diagram of the energy storage assembly in the operating mechanism of a unidirectional on-load tap changer according to an embodiment of the present invention. The energy storage component comprises: crank shaft 501, connecting rod 502, sliding rod 503, slider 504 and spring 505. The energy storage assembly further comprises a positioning assembly, and the positioning assembly comprises: a latch 506, a roller 507, and a detent 508. The output component connected to the energy storage component is an output dial 509. The crank rotating shaft 501 is connected with the output gear, and the crank rotating shaft 501 rotates along with the output gear. The connecting rod 502 is mounted on the crank shaft 501. The sliding block 503 is installed at the end of the connecting rod 502, and the sliding block 503 is sleeved on the sliding rod 504 and can slide along the sliding rod 504. A spring 505 is mounted on the slide bar 504. The slide bar 504 is mounted on an output turntable 509. The latch 506 is mounted on an output turntable 509 and the detent 508 is provided on the housing of the operating mechanism. The roller 507 is mounted on the crank shaft 501. When the latch 506 is inserted into one of the detents 508, the detent is in the locked position and the output dial 509 is locked against rotation.
Referring to fig. 5a and 5b, in the process of rotating from fig. 5a to fig. 5b, during the process of storing energy, the output gear rotates, which drives the crank rotating shaft 501 to rotate at the angular velocity ω, and the crank rotating shaft 501 drives the connecting rod 502 and drives the sliding block 503 to slide along the sliding rod 504 through the connecting rod 502. When the positioning device is in the locking position, the position of the output dial 509 is fixed, so the slide 503 pushes the spring 505 to compress, and the spring 505 charges energy.
In the position shown in fig. 5b, the output gear rotates the crank shaft 501 to the release position. The roller 507 mounted on the crank shaft 501 rotates to the position where the latch 506 is located. In the state shown in fig. 5b, the crank shaft 501 continues to rotate at the angular velocity ω. In the release position, the roller 507 pushes the latch 506 out of the detent 508. When the latch 506 exits the detent 508, the detent releases and unlocks the output dial 509.
After the output dial 509 is unlocked, the process of fig. 5b to 5c is entered, and the spring releases energy to drive the output dial to rotate. After the output dial is released, the positioning device is released, the output dial is unlocked, and the spring releases energy to drive the output dial 509 to rotate at the angular speed ω 1. The angular velocity ω 1 is a rotational speed driven by the spring energy release, and the rotational speed of the angular velocity ω 1 is greater than the angular velocity ω. A latch 506 mounted on an output turntable 509 follows the rotation of the output turntable and is inserted into the next detent 508 on the rack. After the bolt is inserted into the positioning groove again, the positioning device locks the output rotary disc again. Comparing fig. 5c and fig. 5a, when the output turntable is locked again, the whole rotates by an angle, the energy storage assembly and the output assembly rotate by an angle after one energy storage and release process, and the energy storage assembly and the output assembly work circularly in this way.
Fig. 6a and 6b disclose exploded construction views of the operating mechanism of a one-way on-load tap changer according to an embodiment of the invention. Fig. 7a and 7b disclose combined construction diagrams of the operating mechanism of a one-way on-load tap changer according to an embodiment of the invention. Fig. 6a, 6b, 7a and 7b show a combined implementation of the principle of the input assembly shown in fig. 4 and the principle of the energy storage assembly and the output assembly shown in fig. 5a, 5b and 5 c. Referring to fig. 6a, 6b, 7a and 7b, the input, energy storage and output assemblies of the operating mechanism are mounted on a frame. In the illustrated embodiment, the frame includes a lower bracket 601 and an upper bracket 602. The input assembly is mounted on the lower bracket 601 and distributed on two sides of the lower bracket 601, and the energy storage assembly and the output assembly are mounted between the lower bracket 601 and the upper bracket 602. In the illustrated embodiment, the input gear 401, the first transition gear 405, and the reverse overrunning clutch 406 of the input assembly are mounted below the lower carrier 601. The output gear 404, the overrunning clutch 403, the second transition gear 408 and the third transition gear 409 are arranged above the lower bracket 601. The same direction transmission shaft 402 and the reverse transmission shaft 407 transmit through the lower bracket 601. The crank rotating shaft 501 in the energy storage assembly and the output assembly is connected with the output gear 404, and the crank rotating shaft 501 rotates along with the output gear 404. The connecting rod 502 is mounted on the crank shaft 501. The sliding block 503 is rotatably mounted at the end of the connecting rod 502, because the connecting rod 502 will rotate along the crank rotating shaft 501, in order to ensure that the sliding block 503 can always smoothly slide along the sliding rod 504, the sliding block 503 needs to have the capability of rotating relative to the connecting rod 502. The sliding block 503 is sleeved on the sliding rod 504 and can slide along the sliding rod 504. A spring 505 is mounted on the slide bar 504. The slide bar 504 is mounted on an output turntable 509. The latch 506 is mounted on an output dial 509. The roller 507 is mounted on the crank shaft 501. The detent 508 is provided on the upper bracket 602 of the operating mechanism. In the illustrated embodiment, detent 508 is disposed at the bottom of upper support 602. Referring to fig. 6b, a plurality of detents 508 are provided evenly circumferentially spaced about the bottom of the upper support 602. In the illustrated embodiment, the output assembly further includes a damping device including a damping member 510 and a blocker 511. The damper 510 is mounted on the output dial 509 to rotate with the output dial 509. The stop block 511 is mounted on the frame of the operating mechanism. In the illustrated embodiment, the block pieces 511 are disposed on the upper support 602, the number of the block pieces 511 is also several, and a plurality of the block pieces 511 are disposed to be evenly distributed on the upper support 602 along the circumference. After each released rotation of the output dial 509, the damping member 510 will contact one of the blocking blocks 511 before rotating to the next locking position, and the damping member 510 will reduce the rotation speed of the output dial 509, so as to reduce the impact of the output dial on the overall machine structure, and on the other hand, reduce the rotation speed of the output dial 509 when the next locking position is reached, so that the latch 506 can be inserted into the next positioning slot 508 more easily.
The operating mechanism of the one-way on-load tap-changer has the following characteristics and advantages: the overrunning clutch forms a homodromous transmission path and a reverse transmission path, so that the output gear always outputs rotation in a single direction no matter the input gear rotates clockwise or anticlockwise in the input assembly. The energy storage of the spring is realized by using a connecting rod mechanism formed by the crank rotating shaft and the sliding block, and the input of a large rotating angle can be realized. A plurality of damping and buffering devices are arranged to reduce the impact of the output turntable on the mechanism and prolong the mechanical life of the operating mechanism.
It should also be noted that the above-mentioned embodiments are only specific embodiments of the present invention. It is apparent that the present invention is not limited to the above embodiments and similar changes or modifications can be easily made by those skilled in the art from the disclosure of the present invention and shall fall within the scope of the present invention. The embodiments described above are provided to enable persons skilled in the art to make or use the invention and that modifications or variations can be made to the embodiments described above by persons skilled in the art without departing from the inventive concept of the present invention, so that the scope of protection of the present invention is not limited by the embodiments described above but should be accorded the widest scope consistent with the innovative features set forth in the claims.
Claims (9)
1. An operating mechanism for a one-way on-load tap changer, comprising:
the input assembly comprises an input gear and an output gear, the input gear is driven by external force to rotate, the input gear is connected with the output gear through a same-direction transmission path and a reverse transmission path, when the rotation direction of the input gear is the same as that of the output gear, the input gear drives the output gear to rotate through the same-direction transmission path, when the rotation direction of the input gear is reverse to that of the output gear, the input gear drives the output gear to rotate through the reverse transmission path, and the output gear always rotates in the same direction;
the energy storage assembly is connected to the input assembly and comprises a spring and a positioning device;
the output assembly is connected to the energy storage assembly;
the output gear of the input assembly rotates to drive the energy storage assembly to act, the positioning device is located at a locking position, the spring of the energy storage assembly stores energy, the output assembly is locked, the output gear rotates to a releasing position, the positioning device releases to unlock the output assembly, the spring of the energy storage assembly releases energy to drive the output assembly to rotate, the output assembly rotates to the next locking position, and the positioning device locks the output assembly again.
2. The operating mechanism for a one-way on-load tap changer of claim 1 wherein the in-line drive path of the input assembly comprises an in-line drive shaft and an in-line overrunning clutch, the input gear being connected to the in-line drive shaft, the in-line overrunning clutch being mounted on the in-line drive shaft, the output gear being connected to the in-line overrunning clutch;
when the rotation direction of the input gear is the same as that of the output gear, the homodromous overrunning clutch is meshed with the homodromous transmission shaft, the input gear drives the output gear to rotate in the same direction through the homodromous transmission shaft and the homodromous overrunning clutch, and when the rotation direction of the input gear is opposite to that of the output gear, the homodromous overrunning clutch is sleeved with the homodromous transmission shaft in a hollow way.
3. The operating mechanism for a one-way on-load tap changer of claim 2, wherein the reverse drive path of the input assembly comprises a first transition gear, a second transition gear, a third transition gear, a reverse drive shaft, and a reverse overrunning clutch, wherein the input gear is engaged with the first transition gear, the first transition gear is connected to the reverse overrunning clutch, the reverse overrunning clutch is mounted on the reverse drive shaft, the reverse drive shaft is connected to the second transition gear, the second transition gear is engaged with the third transition gear, and the third transition gear is engaged with the output gear;
when the rotation direction of the input gear is opposite to that of the output gear, the output gear drives the first transition gear to rotate, the reverse overrunning clutch is meshed with the reverse transmission shaft, the first transition gear drives the reverse transmission shaft to rotate through the reverse overrunning clutch, the reverse transmission shaft drives the second transition gear to rotate, the second transition gear drives the third transition gear to rotate, the third transition gear drives the output gear to rotate, the rotation direction of the output gear is opposite to that of the input gear, and when the rotation direction of the input gear is the same as that of the output gear, the reverse overrunning clutch and the reverse transmission shaft are in an empty sleeve.
4. An operating mechanism for a one-way on-load tap changer according to claim 1 wherein said stored energy assembly comprises: the crank rotating shaft, the connecting rod, the sliding block and the spring;
the crank rotating shaft is connected with the output gear, the crank rotating shaft rotates along with the output gear, the connecting rod is installed on the crank rotating shaft, the sliding block is installed at the end of the connecting rod in a rotating mode, the sliding block is sleeved on the sliding rod and can slide along the sliding rod, and the spring is installed on the sliding rod;
the output gear rotates to drive the crank rotating shaft to rotate, the crank rotating shaft drives the connecting rod and drives the sliding block to slide along the sliding rod through the connecting rod, and when the positioning device is located at the locking position, the sliding block pushes the spring to compress, and the spring stores energy.
5. An operating mechanism for a one-way on-load tap changer according to claim 4 wherein the output member is an output turntable, the slide rod is mounted on the output turntable, and when the positioning means is in the locked position, the output member is locked, the spring is charged, the positioning means is released, the output turntable is unlocked, and the spring is charged to rotate the output turntable.
6. An operating mechanism for a one-way on-load tap-changer according to claim 5 wherein the positioning means of the energy storage assembly comprises a latch, a roller and a positioning slot, the latch is mounted on the output turntable, the positioning slot is provided on the frame of the operating mechanism, the roller is mounted on the crank shaft, the latch is inserted into one positioning slot, the positioning means is located in the locking position, the output turntable is locked, the output gear drives the crank shaft to rotate to the release position, the roller pushes the latch to exit the positioning slot, the positioning means releases the output turntable, the spring releases the energy to drive the output turntable to rotate, the latch follows the output turntable to rotate and is inserted into the next positioning slot, and the positioning means locks the output turntable again.
7. The operating mechanism of a one-way on-load tap-changer according to claim 6, wherein the output assembly further comprises a damping device, the damping device comprises a damping member and a blocking block, the damping member is mounted on the output rotary disc and rotates with the output rotary disc, the blocking block is mounted on the frame of the operating mechanism, the damping member contacts with the blocking block before the output rotary disc rotates to the next locking position, and the damping member reduces the rotation speed of the output rotary disc.
8. An operating mechanism for a one-way on-load tap changer according to claim 7 wherein the housing of the operating mechanism comprises a lower bracket and an upper bracket, the input assembly being mounted to the lower bracket and distributed on opposite sides of the lower bracket, and the energy storage assembly and the output assembly being mounted between the lower bracket and the upper bracket.
9. The operating mechanism for a one-way on-load tap changer according to claim 7, wherein the stops and detents are provided on the upper bracket, and wherein a plurality of stops and a plurality of detents are provided evenly circumferentially distributed.
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| CN202011098480.1A CN112259389B (en) | 2020-10-14 | 2020-10-14 | Operating mechanism of unidirectional on-load tap-changer |
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| CN202011098480.1A CN112259389B (en) | 2020-10-14 | 2020-10-14 | Operating mechanism of unidirectional on-load tap-changer |
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Cited By (1)
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|---|---|---|---|---|
| CN116164141A (en) * | 2023-02-12 | 2023-05-26 | 上海交通大学 | Pressure release valve device of on-load tap-changer |
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| Publication number | Publication date |
|---|---|
| CN112259389B (en) | 2023-06-20 |
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