CN111146041B - Driving mechanism of vacuum switch - Google Patents
Driving mechanism of vacuum switch Download PDFInfo
- Publication number
- CN111146041B CN111146041B CN201911399731.7A CN201911399731A CN111146041B CN 111146041 B CN111146041 B CN 111146041B CN 201911399731 A CN201911399731 A CN 201911399731A CN 111146041 B CN111146041 B CN 111146041B
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- iron plate
- pure iron
- transmission shaft
- coil
- fixed
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- 230000007246 mechanism Effects 0.000 title claims abstract description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 142
- 230000005540 biological transmission Effects 0.000 claims abstract description 81
- 229910052742 iron Inorganic materials 0.000 claims abstract description 71
- 230000000670 limiting effect Effects 0.000 claims abstract description 51
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000009471 action Effects 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/46—Interlocking mechanisms
- H01H33/50—Interlocking mechanisms for interlocking two or more parts of the mechanism for operating contacts
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses a driving mechanism of a vacuum switch, which comprises a first pure iron plate; a second pure iron plate; a bottom plate; a first support column; a second support; the brake separating coil is fixed on the lower surface of the first pure iron plate; the closing coil is fixed on the upper surface of the second pure iron plate; the vortex disc is arranged between the opening coil and the closing coil; the upper end of the transmission shaft extends out of the upper surface of the first pure iron plate; the fixed seat is fixed on the lower surface of the second pure iron plate; the guide section is sleeved in the guide hole; the limiting groove is arranged on the guide section and extends along the circumferential direction of the guide section; the first elastic piece is arranged in the mounting hole; the limiting ball is arranged in the mounting hole and positioned between the first elastic piece and the guide section; the lower end of the mounting piece is fixed with the upper surface of the bottom plate, and the upper end of the mounting piece extends upwards; the limiting piece is arranged on the mounting piece; the second elastic piece is arranged between the end face of the lower end of the transmission shaft and the limiting piece. The vacuum switch is driven to be opened and closed quickly, the time is short, and the reliability of opening and closing of the vacuum switch can be ensured.
Description
Technical Field
The invention relates to switch driving equipment in a flexible direct-current extra-high voltage converter valve control power transmission system, in particular to a driving mechanism of a vacuum switch.
Background
The control of the flexible direct current extra-high voltage converter valve is a solid switch formed by power electronic devices, and the direct current cannot be switched on or off by the existing alternating current vacuum circuit breaker because the direct current does not have zero crossing. At present, in a flexible direct-current extra-high voltage converter valve power transmission system, an improved vacuum switch is adopted, the vacuum switch is usually driven to open or close by a magnetic driving mechanism, the magnetic driving mechanism comprises an opening coil, a closing coil, an eddy current disc and a connecting rod, and a pulse magnetic field generated by the opening coil and the closing coil pushes the eddy current disc to move up and down to drive the contact to be attracted and disconnected, so that opening and closing actions are completed. According to the requirement, in order to keep the solid-state switch in a switching-off or switching-on state, a magnetic mechanism is adopted for keeping, the exciting time is long, so that the response speed is slow when switching the switching-on state and the switching-off state, the magnetic mechanism needs a permanent magnet, and the product cost is high.
Therefore, how to shorten the response time of the solid-state switch and reduce the cost of the product is a technical problem to be solved.
Disclosure of Invention
The invention aims to provide a driving mechanism of a vacuum switch, which has the advantages of high switching-on and switching-off speed and short time and can ensure the switching-on and switching-off reliability of the vacuum switch.
The technical scheme for achieving the purpose is as follows:
a drive mechanism for a vacuum switch, comprising:
A first pure iron plate;
a second pure iron plate;
A bottom plate;
the upper end of the first support column is fixed with the lower surface of the first pure iron plate, and the lower end of the first support column is fixed with the upper surface of the second pure iron plate;
The upper end of the second support column is fixed with the lower surface of the second pure iron plate, and the lower end of the second support column is fixed with the upper surface of the bottom plate;
a switching-off coil fixed to a lower surface of the first pure iron plate;
a closing coil fixed to an upper surface of the second pure iron plate;
The eddy current disc is arranged between the opening coil and the closing coil and can move towards the opening coil or the closing coil;
The upper end of the transmission shaft sequentially passes through the second pure iron plate, the switching-on coil, the vortex plate, the switching-off coil and the first pure iron plate upwards and extends out of the upper surface of the first pure iron plate, the lower end of the transmission shaft is positioned between the second pure iron plate and the base, is fixed with the vortex plate, is movably matched with the first pure iron plate, the switching-on coil and the second pure iron plate and can reciprocate up and down along the axis of the transmission shaft;
The fixing seat is fixed on the lower surface of the second pure iron plate and comprises a guide hole penetrating along the upper and lower directions of the second pure iron plate and a mounting hole which is arranged on the side surface of the second pure iron plate, extends towards the direction of the inner wall of the guide hole and penetrates the inner wall of the guide hole;
the guide section is formed by a part of the transmission shaft between the lower surface of the second pure iron plate and the end face of the lower end of the transmission shaft, is sleeved in the guide hole and can reciprocate up and down along the guide hole;
the limiting groove is arranged on the guide section and extends along the circumferential direction of the guide section;
the first elastic piece is arranged in the mounting hole;
the limiting ball is arranged in the mounting hole and positioned between the first elastic piece and the guide section;
the lower end of the mounting piece is fixed with the upper surface of the bottom plate, and the upper end of the mounting piece extends upwards and points to the end face of the lower end of the transmission shaft;
the limiting piece is arranged on the mounting piece;
the second elastic piece is arranged between the end face of the lower end of the transmission shaft and the limiting piece.
The distance between the closing coil and the opening coil is larger than the stroke of the eddy current disc.
The opening coil, the vortex disc and the closing coil are all round, and the circle centers of the opening coil, the vortex disc and the closing coil are collinear.
The clearance distance between the eddy current disc and the closing coil is 1mm, and the clearance distance between the eddy current disc and the opening coil is 1mm.
The transmission shaft is sleeved in the first guide sleeve and is in sliding fit with the first guide sleeve, and the first guide sleeve is fixedly connected with the inner ring of the brake separating coil and the first pure iron plate; the transmission shaft is sleeved in the second guide sleeve and is in sliding fit with the second guide sleeve, and the second guide sleeve is fixedly connected with the inner ring of the closing coil and the second pure iron plate.
The first elastic piece is a pressure spring, and the second elastic piece is a top spring sleeved outside the mounting piece.
The periphery of the end of the guide section, which faces the base, is provided with a boss.
The mounting piece is provided with external threads, the limiting piece is provided with a through hole, the inner wall of the through hole is provided with internal threads, and the mounting piece is screwed with the limiting piece; or the mounting piece and the limiting piece are integrally manufactured, and the lower end of the mounting piece is screwed with a nut fixed on the upper surface of the bottom plate.
The device also comprises an adjusting piece, wherein the adjusting piece is screwed with the mounting hole from the orifice on the side surface of the mounting hole.
The beneficial effects of the invention are as follows:
When the invention is applied to a vacuum switch in a flexible direct-current ultra-high voltage transmission system, the upper end of the transmission shaft is connected with a moving contact of the vacuum switch. The invention generates a magnetic field through the electrifying of the switching-on/switching-off coil, generates repulsive force with the vortex disk, drives the transmission shaft to move up and down, drives the moving contact in the vacuum switch to move up to be contacted with the fixed contact so as to realize switching-on, or drives the moving contact in the vacuum switch to move down to be separated from the fixed contact so as to realize switching-off and switching-on of the vacuum switch. The transmission shaft of the invention has the advantages of coaxial up-and-down movement direction and the movement direction of the moving contact, no crank lever, simple and stable mechanical transfer function of the driving system, and the action time dispersity smaller than plus or minus 0.2ms, and is suitable for accurate control. The external energy storage capacitor is adopted to discharge the closing and opening coil, the driving force intensity is in direct proportion to the energy storage of the capacitor, and the capacitor energy storage mode can output larger current to enable the circuit breaker to complete closing and opening between 2ms, so that the moving and static contacts have the advantages of high closing and opening action speed, small moving inertia, high closing and opening efficiency, high control precision, short pre-breakdown time, short time of existence of an electric arc, small on-state loss of a switch, small heating value, small electric abrasion energy on the surfaces of the moving and static contacts and prolonged service life.
When the brake is opened, the transmission shaft is locked by the self-locking mechanism formed by the fixed seat, the guide section, the limiting groove, the first elastic piece, the limiting ball, the mounting piece, the limiting piece and the second elastic piece, so that the reliable maintenance of the brake opening state of the invention can be ensured, and when the brake is closed, the second elastic piece stretched by the self-locking mechanism to prop against the end face of the lower end of the transmission shaft, the reliable maintenance of the contact between the moving contact and the fixed contact of the invention can be ensured, the false operation of the moving contact is prevented, and the reliability of the brake opening and closing is ensured. The self-locking mechanism has the advantages of simple structure, reliable and stable performance, and flexible application of mechanical principles to achieve the functions of opening self-locking and closing holding. And the traditional magnetic force is replaced, the exciting time is reduced, the switching-on and switching-off response speed is increased, and the cost of the permanent magnet is reduced.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic diagram of the connection structure of the opening coil, the closing coil, the eddy current disk and the transmission shaft.
Fig. 3 is a schematic diagram of a connection structure among a fixing seat, a guide section, a limit groove, a limit ball, a mounting piece and a second elastic piece.
Fig. 4 is an enlarged view of fig. 1A.
Fig. 5 is a schematic structural diagram of the fixing base of the present invention.
Detailed Description
The following examples are given as a specific description of the present invention, it being necessary to point out that the following examples are given for further illustration of the invention and are not to be construed as limiting the scope of the invention.
It should be noted that, in the description of the present invention, the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. The description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.
Fig. 1-2 schematically illustrate an embodiment of a drive mechanism for a vacuum switch, among many embodiments of the invention. The driving mechanism of the vacuum switch comprises a first pure iron plate 1, a second pure iron plate 2, a bottom plate 3, a first support column 4, a second support column 5, a switching-off coil 6, a switching-on coil 7, an eddy current disk 8, a transmission shaft 9, a fixing seat 10, a first elastic piece 11, a guide section 91, a limit groove 92, a limit ball 12, a mounting piece 13, a limit piece 14 and a second elastic piece 15.
In the embodiment shown in fig. 1, the first pure iron plate 1, the second pure iron plate 2 and the bottom plate 3 are all flat plate structures. It is to be understood that the first and second pure iron plates 1,2, 3 are not limited to a flat plate structure, but may be other structures as long as the functions thereof in the present invention can be achieved.
The upper end of the first leg 4 is fixed to the lower surface of the first pure iron plate 1 and the lower end thereof is fixed to the upper surface of the second pure iron plate 2, for example, by, but not limited to, welding. The upper end of the second leg 5 is fixed to the lower surface of the second pure iron plate 2 and the lower end thereof is fixed to the upper surface of the bottom plate 3, for example, but not limited to, by welding. Or the first pure iron plate 1, the second pure iron plate 2, the bottom plate 3, the first support post 4 and the second support post 5 are integrally manufactured.
In the embodiment shown in fig. 1, the number of the first struts 4 and the second struts 5 is 4, and the first struts and the second struts are respectively distributed in a quadrilateral manner. It will be appreciated that the number of first struts 4, second struts 5 is not a particular value, but may be other numbers as desired. When the invention is arranged in the manner presented in fig. 1, both the first support column 4 and the second support column 5 act as supports.
Referring also to fig. 2, the opening coil 6 is fixed to the lower surface of the first pure iron plate 1. The closing coil 7 is fixed to the upper surface of the second pure iron plate 2. The eddy current disk 8 is provided between the opening coil 6 and the closing coil 7 and is movable in the direction of the opening coil 6 or the closing coil 7. The upper end of the transmission shaft 9 sequentially passes through the second pure iron plate 2, the switching-on coil 7, the vortex plate 8, the switching-off coil 6 and the first pure iron plate 1 upwards and extends out of the first pure iron plate 1, the lower end of the transmission shaft is positioned between the second pure iron plate 2 and the base, the transmission shaft is fixed with the vortex plate 8, and the transmission shaft is movably matched with the first pure iron plate 1, the switching-on coil 6, the switching-on coil 7 and the second pure iron plate 2 and can reciprocate up and down along the axis of the transmission shaft. Preferably, the upper end of the transmission shaft 9 is connected with a connecting seat 20, and the connecting seat 20 is used for being connected with a moving contact of a vacuum switch. The outer diameter of the connection seat 20 is greater than the inner diameter of the through hole provided in the first pure iron plate 1 through which the driving shaft 9 passes, so as to prevent the stroke of the driving shaft 9 moving downward from exceeding the allowable range. The drive shaft 9 may be a stepped shaft having a cylindrical shape.
The brake separating coil 6 comprises a first coil skeleton 61 and a first enameled wire 62 arranged on the first coil skeleton 61. The closing coil 7 includes a second bobbin 71 and a second enamel wire 72 disposed on the second bobbin 71.
Referring to fig. 3 to 5 together, the fixing base 10 is fixed to the lower surface of the second pure iron plate 2, and includes a guide hole 101 penetrating in the up-down direction thereof and a mounting hole 102 provided at a side surface thereof to extend in the direction of the inner wall of the guide hole 101 and penetrating the inner wall of the guide hole 101. The guide hole 101 guides the upward and downward movement of the transmission shaft 9, and prevents the lower end of the transmission shaft 9 from swinging sideways when it moves upward and downward.
The guide section 91 is formed by a portion of the transmission shaft 9 between the lower surface of the second pure iron plate 2 and the lower end face of the transmission shaft 9, is sleeved in the guide hole 101, and can reciprocate up and down along the guide hole 101.
The limiting groove 92 is disposed on the guide section 91, and extends along the circumferential direction of the guide section 91. The limiting grooves 92 preferably extend circumferentially along the guide section 91 in end-to-end communication.
The first elastic member 11 is disposed in the mounting hole 102.
The limiting ball 12 is a ball structure, and is disposed in the mounting hole 102 and located between the first elastic member 11 and the guide section 91. The check ball 12 may be, but is not limited to, a steel ball.
The lower end of the mounting member 13 is fixed to the upper surface of the base plate 3, and the upper end thereof extends upward and is directed toward the lower end face of the drive shaft 9. The mounting member 13 also prevents the transmission shaft 9 from moving downward beyond the allowable range.
The stopper 14 is provided to the mount 13.
The second elastic element 15 is disposed between the lower end surface of the transmission shaft 9 and the limiting element 14, and the limiting element 14 limits the downward movement of the second elastic element 15.
The up-and-down movement track of the transmission shaft 9 is preferably coincident with the axis of the transmission shaft, so that the up-and-down movement direction of the transmission shaft 9 and the movement direction of the moving contact of the vacuum switch are reliably ensured to be coaxial without a crank lever.
In some embodiments, the distance between the closing coil 7 and the opening coil 6 is greater than the stroke of the eddy current disk 8.
In some embodiments, the opening coil 6, the eddy current disk 8 and the closing coil 7 are all circular, and the centers of the circles of the opening coil, the eddy current disk and the closing coil are collinear.
In some embodiments, the gap distance between the eddy current disk 8 and the closing coil 7 is 1mm, and the gap distance between the eddy current disk 8 and the opening coil 6 is 1mm.
In some embodiments, the invention further comprises a first guide sleeve 27 sleeved in the inner ring of the brake separating coil 6 and penetrating through the first pure iron plate 1, the transmission shaft 9 is sleeved in the first guide sleeve 27 and is in sliding fit with the first guide sleeve 27, and the first guide sleeve 27 is fixedly connected with the inner ring of the brake separating coil 6 and the first pure iron plate 1, so that the transmission shaft 9 can flexibly move in the first guide sleeve 27, and can be prevented from swinging sideways when the transmission shaft 9 moves up and down. The driving shaft 9 is sleeved in the second guide sleeve 28 and is in sliding fit with the second guide sleeve 28, and the second guide sleeve 28 is fixedly connected with the inner ring of the closing coil 7 and the second pure iron plate 2, so that the driving shaft 9 can flexibly move in the second guide sleeve 28 and can be prevented from swinging sideways when the driving shaft 9 moves up and down.
In some embodiments, the first elastic member 11 is a compression spring, and the second elastic member 15 is a top spring sleeved outside the mounting member 13.
In some embodiments, the outer periphery of the end of the guide section 91 facing the base is provided with a boss 93, and the boss 93 limits the upward movement travel of the transmission shaft 9, so as not to cause the second elastic member 15 to be located upward too much to damage the moving contact and/or the fixed contact of the vacuum switch.
In some embodiments, the mounting piece 13 is integrally formed with the limiting piece 14, the lower end of the mounting piece 13 is screwed with the nut 18 fixed on the upper surface of the bottom plate 3, the moment of the second elastic piece 15 can be conveniently adjusted by rotating the mounting piece 13, the height of the upper end face of the mounting piece 13 relative to the upper surface of the bottom plate 3 can be adjusted by adjusting the mounting piece 13, and the limiting effect on the downward moving stroke of the transmission shaft 9 can be achieved. Or the mounting piece 13 is provided with external threads, the limiting piece 14 is provided with a through hole, the inner wall of the through hole is provided with internal threads, the mounting piece 13 is screwed with the limiting piece 14, and the limiting piece 14 is rotated, so that the moment of the second elastic piece 15 can be conveniently adjusted.
In some embodiments, the present invention further includes an adjusting member 19, where the adjusting member 19 is screwed with the mounting hole 102 from an aperture of the mounting hole 102 located on the side surface of the fixing base 10, and the adjusting member 19 is rotated to adjust the moment of the first elastic member 11, so as to adjust the pressure of the limiting ball 12 on the limiting groove 92, and further adjust the magnitude of the self-locking force.
When the invention is applied to a vacuum switch in a flexible direct-current ultra-high voltage transmission system, the upper end of the transmission shaft 9 is connected with a moving contact of the vacuum switch. When the brake is opened, the brake opening coil 6 is driven by an external energy storage capacitor to generate a magnetic field, repulsive force is generated between the brake opening coil 6 and the vortex disc 8, the vortex disc 8 is driven to move downwards, the vortex disc 8 applies downward acting force to the transmission shaft 9, the acting force overcomes the upward pushing force applied by the second elastic piece 15 to the transmission shaft 9, the transmission shaft 9 is driven to move downwards, the transmission shaft 9 drives the moving contact to move downwards, and the moving contact is separated from the static contact of the vacuum switch to realize brake opening. The limiting ball 12 is pressed on the side face of the transmission shaft 9 under the elastic action of the first elastic piece 11, the limiting ball 12 and the side face of the transmission shaft 9 form a rolling pair together, and in the process that the vortex disk 8 drives the transmission shaft 9 to move downwards, under the action of friction force, the transmission shaft 9 moves downwards to drive the limiting ball 12 to rotate in the mounting hole 102. Along with the continuous downward movement of the transmission shaft 9, the orifice of the limiting groove 92 and the mounting hole 102 positioned on the inner wall of the guide hole 101 are gradually aligned, in this process, the limiting ball 12 gradually moves from the side wall of the transmission shaft 9 into the limiting groove 52 under the elastic force of the first elastic piece 11 until the limiting ball 12 enters the limiting groove 92 and can not move towards the bottom surface of the limiting groove 92, at this time, the limiting ball 12 is positioned in the limiting groove 92, the rest of the limiting ball 12 is positioned in the mounting hole 102, the limiting ball 12, the limiting groove 92 and the mounting hole 102 mutually cooperate to lock the transmission shaft 9 and can not move up and down freely, the reliable maintenance of the vacuum switch in the opening state is ensured, and the opening self-locking function of the vacuum switch is realized.
When the electric switch is switched on, the switching-on coil 7 generates a magnetic field under the drive of an external energy storage capacitor, repulsive force is generated between the switching-on coil 7 and the vortex disc 8, the vortex disc 8 is driven to move upwards, under the combined action that the vortex disc 8 applies upward acting force to the transmission shaft 9 and the second elastic piece 15 applies upward jacking force to the transmission shaft 9, the transmission shaft 9 moves upwards, the transmission shaft 9 drives the moving contact to move upwards, and the moving contact contacts with the fixed contact of the vacuum switch to realize switching-on. When the transmission shaft 9 just starts to move upwards, the limiting ball 12 receives the acting force of the side wall edge of the limiting groove 92, one component force of the acting force directs to the first elastic element 11, the component force overcomes the acting force of the first elastic element 11 to the limiting ball 12, the limiting ball 12 is pushed to move along the mounting hole 102 in the direction away from the transmission shaft 9, as the transmission shaft 9 continues to move upwards, the limiting ball 12 gradually moves along the mounting hole 102 in the direction away from the transmission shaft 9, the first elastic element 11 is gradually compressed until the limiting ball 12 is completely separated from the limiting groove 92, and self-locking is released. The transmission shaft 9 continues to move upwards again, the limit ball 12 is pressed in the side of transmission shaft 9 under the elasticity effect of first elastic component 11, limit ball 12 constitutes the rolling pair with transmission shaft 9 side jointly, vortex dish 8 drives transmission shaft 9 and upwards moves the in-process, under the frictional force effect, transmission shaft 9 upwards moves and drives limit ball 12 and rotate in mounting hole 102, after transmission shaft 9 upwards moves in place, second elastic component 15 stretches upwards to prop up transmission shaft 9, guarantee that the vacuum switch reliably keeps the combined floodgate state, realize this vacuum switch combined floodgate function of keeping. The second elastic member 15 may also play a role of cushioning the downward movement of the transmission shaft 9.
The specific features described in the above embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the invention is not described in any detail with respect to the various possible combinations.
The present invention has been described in detail with reference to the embodiments thereof, which are intended to be illustrative rather than restrictive, and variations and modifications are within the scope of the present invention without departing from the general inventive concept.
Claims (8)
1. The utility model provides a actuating mechanism of vacuum switch, this vacuum switch is arranged in flexible direct current extra-high voltage transmission system, its characterized in that includes:
A first pure iron plate (1);
a second pure iron plate (2);
a bottom plate (3);
the upper end of the first support column (4) is fixed with the lower surface of the first pure iron plate (1), and the lower end of the first support column is fixed with the upper surface of the second pure iron plate (2);
The upper end of the second support column (5) is fixed with the lower surface of the second pure iron plate (2), and the lower end of the second support column is fixed with the upper surface of the bottom plate (3);
a brake-separating coil (6) fixed to the lower surface of the first pure iron plate (1);
a closing coil (7) fixed to the upper surface of the second pure iron plate (2);
An eddy current disk (8) which is provided between the opening coil (6) and the closing coil (7) and can move in the direction of the opening coil (6) or the closing coil (7);
the upper end of the transmission shaft (9) sequentially passes through the second pure iron plate (2), the closing coil (7), the vortex disc (8), the opening coil (6) and the first pure iron plate (1) upwards and stretches out of the upper surface of the first pure iron plate (1), the lower end of the transmission shaft is positioned between the second pure iron plate (2) and the base, is fixed with the vortex disc (8), and is movably matched with the first pure iron plate (1), the opening coil (6), the closing coil (7) and the second pure iron plate (2) and can reciprocate up and down along the axis of the transmission shaft;
The fixing seat (10) is fixed on the lower surface of the second pure iron plate (2) and comprises a guide hole (101) penetrating along the up-down direction of the second pure iron plate and a mounting hole (102) which is arranged on the side surface of the second pure iron plate, extends towards the inner wall of the guide hole (101) and penetrates the inner wall of the guide hole (101);
the guide section (91) is formed by a part, between the lower surface of the second pure iron plate (2) and the end surface of the lower end of the transmission shaft (9), is sleeved in the guide hole (101) and can reciprocate up and down along the guide hole (101);
a limit groove (92) which is provided on the guide section (91) and extends circumferentially along the guide section (91);
a first elastic member (11) provided in the mounting hole (102);
A limit ball (12) which is arranged in the mounting hole (102) and is positioned between the first elastic piece (11) and the guide section (91);
The lower end of the mounting piece (13) is fixed with the upper surface of the bottom plate (3), and the upper end of the mounting piece extends upwards and points to the end face of the lower end of the transmission shaft (9);
A stopper (14) provided to the mounting member (13);
The second elastic piece (15) is arranged between the lower end face of the transmission shaft (9) and the limiting piece (14);
the distance between the closing coil (7) and the opening coil (6) is larger than the stroke of the eddy current disc (8);
The gap distance between the vortex disc (8) and the closing coil (7) is 1mm, and the gap distance between the vortex disc (8) and the opening coil (6) is 1mm.
2. The drive mechanism according to claim 1, wherein the opening coil (6), the eddy current disc (8) and the closing coil (7) are all circular, and the centers of the circles of the opening coil, the eddy current disc and the closing coil are collinear.
3. The driving mechanism according to claim 1, further comprising a first guide sleeve (16) sleeved in the inner ring of the opening coil (6) and penetrating through the first pure iron plate (1), wherein the transmission shaft (9) is sleeved in the first guide sleeve (16) and is in sliding fit with the first guide sleeve (16), and the first guide sleeve (16) is fixedly connected with the inner ring of the opening coil (6) and the first pure iron plate (1); the device also comprises a second guide sleeve (17) sleeved in the inner ring of the closing coil (7) and penetrating through the second pure iron plate (2), the transmission shaft (9) is sleeved in the second guide sleeve (17) and is in sliding fit with the second guide sleeve (17), and the second guide sleeve (17) is fixedly connected with the inner ring of the closing coil (7) and the second pure iron plate (2).
4. The driving mechanism according to claim 1, wherein the first elastic member (11) is a compression spring, and the second elastic member (15) is a top spring sleeved outside the mounting member (13).
5. A drive mechanism according to claim 1, characterized in that the outer periphery of the end of the guide section (91) facing the base is provided with a boss (93).
6. The driving mechanism according to claim 1, wherein the mounting member (13) has an external thread, the stopper member (14) has a through hole, the inner wall of the through hole has an internal thread, and the mounting member (13) is screwed with the stopper member (14); or the mounting piece (13) and the limiting piece (14) are integrally manufactured, and the lower end of the mounting piece (13) is screwed with a nut (18) fixed on the upper surface of the bottom plate (3).
7. The driving mechanism according to claim 1, wherein the upper end of the transmission shaft (9) is connected with a connecting seat (20), and the outer diameter of the connecting seat (20) is larger than the inner diameter of a through hole provided in the first pure iron plate (1) and through which the transmission shaft (9) passes.
8. The drive mechanism of any one of claims 1 to 7, further comprising an adjustment member (19), wherein the adjustment member (19) is screwed into the mounting hole (102) from an aperture in the mounting hole (102) located on a side of the mounting base (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911399731.7A CN111146041B (en) | 2019-12-30 | 2019-12-30 | Driving mechanism of vacuum switch |
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