CN113451078A - Star-delta starting drive - Google Patents
Star-delta starting drive Download PDFInfo
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- CN113451078A CN113451078A CN202110867822.XA CN202110867822A CN113451078A CN 113451078 A CN113451078 A CN 113451078A CN 202110867822 A CN202110867822 A CN 202110867822A CN 113451078 A CN113451078 A CN 113451078A
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- 230000007246 mechanism Effects 0.000 claims abstract description 81
- 230000000903 blocking effect Effects 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 10
- 230000004913 activation Effects 0.000 claims description 8
- 238000000926 separation method Methods 0.000 description 22
- 238000000034 method Methods 0.000 description 11
- 230000009471 action Effects 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 239000004020 conductor Substances 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 239000003086 colorant Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/14—Terminal arrangements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/26—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor
- H02P1/32—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor by star/delta switching
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention belongs to the technical field of star-delta motors, and particularly relates to a star-delta starting device. The actuating mechanism comprises a plurality of actuating mechanisms arranged side by side, each actuating mechanism comprises a first moving contact and a second moving contact, a first fixed contact is correspondingly arranged at the free end of each first moving contact, second fixed contacts and short contacts are correspondingly arranged on two sides of the free end of each second moving contact, a first wiring end is in flexible connection with the fixed end of each first moving contact, a second wiring end is in flexible connection with the first fixed contact, a third wiring end is in flexible connection with the fixed end of each second moving contact, and the first fixed contacts are connected with the second fixed contacts. The invention is used for solving the problems that the star-delta loop adopts more electric devices and occupies large space, realizes the state switching of the star-delta loop by utilizing the two moving contacts, the fixed contact and the short contact, saves the adoption of the electric devices, reduces the cost, saves the space in a switch cabinet, optimizes the layout in the cabinet, and ensures that the traditional star-delta starting circuit uses a plurality of components and the state of wiring to be intensified by one component.
Description
Technical Field
The invention belongs to the technical field of star-delta motors, and particularly relates to a star-delta starting device.
Background
The star-delta starting circuit is realized by connecting a motor into a star connection when the motor is started, delaying a period of time according to set time after the motor is started successfully, and then connecting the motor into a delta connection, wherein the star-delta starting belongs to step-down starting and is realized by replacing reduced starting current with the sacrifice of power.
At present, the star-delta starting circuit is adopted, and the star-delta starting circuit can be realized only by three contactors or a combination of one control and protection switch and two contactors.
The currently used method of grafting has the following problems: the adoption of more electric devices results in the occupation of larger space in the control cabinet, and meanwhile, the connection points of the primary wire and the secondary wire are more, so that the installation and wiring cost is high; the multi-way switches are in linkage fit, and the requirement on consistency is high; the electric devices are more, so that the easily generated fault points are more, and the problem troubleshooting difficulty is high.
Disclosure of Invention
The technical problem to be solved by the embodiment of the application lies in overcoming the defects of the prior art, and the star-delta starting device is used for solving the problems.
The technical scheme for solving the technical problems in the embodiment of the application is as follows: a star delta activation device, comprising: a plurality of actuating mechanism that set up side by side, actuating mechanism includes:
the free end of the first moving contact is correspondingly provided with a first fixed contact;
the two sides of the free end of the second moving contact are correspondingly provided with a second fixed contact and a short contact;
the first terminal is in flexible connection with the fixed end of the first moving contact;
a second terminal in flexible connection with the first stationary contact;
the third terminal is in flexible connection with the fixed end of the second moving contact;
the first fixed contact is connected with the second fixed contact.
Compared with the prior art, the technical scheme has the following beneficial effects:
the actuating mechanisms arranged side by side are respectively connected with three phase lines, namely first terminals arranged side by side are respectively connected with three-phase power supplies L1, L2 and L3, second terminals arranged side by side are respectively connected with three phases of U1, V1 and W1 of the motor, third terminals arranged side by side are respectively connected with three phases of W2, U2 and V2 of the motor, when the star connection is needed during starting, a first movable contact is connected with a first fixed contact to switch on the three-phase power supplies and the three-phase ends of U1, V1 and W1 of the motor, meanwhile, a second movable contact is connected with a short contact, a short contact in the actuating mechanisms is arranged side by side, the three-phase ends of U2, V2 and W2 of the motor are short-circuited to form the star connection, after a period of time, when the triangle connection needs to be switched, the second movable contact is separated from the short contact and is connected with a second fixed contact, and at the same time, because the second fixed contact is connected with the first fixed contact, the W2 of the motor connected with the third terminals, U2, V2 three-phase passes through the second static contact, the U1 of first static contact and motor, V1, W1 three-phase short circuit, later pass through first moving contact, first wiring end and three phase current's L1, L2, L3 three-phase connection, form the triangular connection, whole start switching process only need control two moving contacts rotate switch can, the quantity of electrical part has been reduced, the occupation space of electrical part has been reduced simultaneously, in addition, carry out the electricity connection inside actuating mechanism, reduce the connection of outside secondary line, the cost is reduced, reduce the trouble probability of occurence of failure and the maintenance degree of difficulty simultaneously.
The two output ends of the control mechanism are respectively connected with the first moving contact and the second moving contact and are used for driving the first moving contact and/or the second moving contact in the plurality of actuating mechanisms to synchronously rotate.
The control mechanism drives the first moving contacts and the second moving contacts in the executing mechanisms arranged side by side to rotate respectively, so that the action of a plurality of first moving contacts in the executing mechanisms arranged side by side is consistent, or the action of a plurality of second moving contacts is consistent, or the action of a plurality of first moving contacts and the action of a plurality of second moving contacts are consistent.
Further, still include with actuating mechanism corresponds the drive mechanism who sets up, drive mechanism includes:
the middle part of the first deflector rod is connected with the output end of the control mechanism;
a first end of the first connecting rod is hinged with a first end of the first driving lever, and a second end of the first connecting rod is hinged with the first moving contact;
the middle part of the second deflector rod is connected with the other output end of the control mechanism;
the first end of the second connecting rod is hinged with the first end of the second driving lever, and the second end of the second connecting rod is hinged with the second moving contact;
the output end of the control mechanism penetrates through the transmission mechanisms to drive the first moving contact and/or the second moving contact to synchronously rotate.
The first moving contact and the second moving contact are driven to act through the transmission mechanism, linkage cooperation of a multi-way switch is omitted, and switching consistency of two loops is guaranteed.
Furthermore, the second end parts of the first shifting lever and the second shifting lever are respectively provided with a two-color indicator.
The rotating positions of the first shifting lever and the second shifting lever are judged through color code colors of the end parts of the first shifting lever and the second shifting lever, so that the current wiring mode, namely the working state of the motor, is conveniently judged.
Further, the first fixed contact and the second fixed contact are the same in structure, and the first fixed contact includes:
an insulating cover;
the contact is arranged in the insulating cover through a first elastic piece, and the first elastic piece is used for ejecting the contact to the first movable contact.
The contact is pushed to the moving contact when the first elastic element between the insulating cover and the contact is in contact with the moving contact, so that the contact is ensured to be in full contact with the moving contact.
Further, the first movable contact is the same as the second movable contact in structure, and the first movable contact includes:
a bracket, the bracket opening facing away from the first stationary contact direction;
the movable contact block is installed in the support, the fixed end of the movable contact block is fixed with the support through a shaft lever in a pivoted mode, a long round hole used for being connected with the support through a pin rod is formed in the middle of the movable contact block, and an elastic piece II used for pushing the movable contact block to rotate around the pivoted position is arranged between the support and the movable contact block.
The movable contact block is arranged in the support, the long round hole formed in the middle of the movable contact block is connected with the support through the pin rod, a certain redundant angle is formed between the movable contact block and the support when the movable contact block rotates around the fixed end shaft rod, and when the movable contact block is pushed to rotate around the fixed end by the elastic piece II arranged between the movable contact block and the support, the free end of the movable contact block is pressed downwards to contact with the short contact head below the free end of the movable contact block, so that good contact between the movable contact block and the short contact head is guaranteed.
Furthermore, the first moving contact and the second moving contact are arranged oppositely, and an arc extinguishing device is arranged between the first moving contact and the second moving contact.
The arc extinguishing device is used for guiding and discharging contact electric arcs, and the two moving contacts are arranged oppositely, so that the overall size of the actuating mechanism is reduced due to reasonable layout.
Furthermore, the control mechanism comprises a supporting plate, a triggering assembly, a switching assembly, a first shifting piece and a second shifting piece, the triggering assembly comprises an electromagnet, a push rod, a shifting block, a pin shaft and a connecting rod, and the switching assembly comprises a rotary disc, a blocking piece, a fixed seat, a connecting piece and an elastic piece; the supporting plate is provided with a V-shaped guide groove, the electromagnet is arranged in the guide sleeve, one end of the ejector rod is arranged in the guide sleeve, a pressure spring is arranged between the ejector rod and the electromagnet, the other end of the ejector rod is hinged with one end of the shifting block, the middle part of the shifting block is connected to the supporting plate in a shaft mode, the other end of the shifting block is connected with the pin shaft, one end of the connecting rod is hinged with the pin shaft, the other end of the connecting rod is provided with a guide post, and the guide post is located in the V-shaped guide groove; the turntable and the blocking piece are coaxially coupled to the support plate, a limiting groove is arranged at the upper part of the turntable, a notch is arranged below the turntable, the guide post is simultaneously positioned in the notch, a limiting post is arranged at the upper end of the blocking piece, the limiting post is positioned in the limiting groove, the forward projection part at the bottom of the lower end of the blocking piece shields the forward projection of the V-shaped guide groove, a gap is reserved between the forward projection part and the inner wall of the V-shaped guide groove, the fixing seat is fixed on the support plate, one end of the elastic piece is fixed on the support plate, the other end of the elastic piece is connected with the fixing seat through a spring, one end of the connecting piece is hinged to the turntable, the other end of the connecting piece is hinged to the elastic piece, one ends of the first shifting piece and the second shifting piece are respectively and coaxially connected to the support plate, and a first output shaft and a second output shaft which are respectively and are coaxially connected to the first moving contact and the second moving contact, the other ends of the first shifting piece and the second shifting piece are respectively provided with a waist hole, and the guide post is simultaneously positioned in the waist holes of the first shifting piece and the second shifting piece.
The control mechanism has two states of normal state and trigger driving, wherein in the normal state: the electromagnet is not electrified, the push rod enables one end, provided with the pin shaft, of the shifting block to keep an upward posture under the action of the pressure spring, so that the guide post is located at the top of one end of the V-shaped guide groove, the bottom of the lower end of the blocking piece is located at one end, where the guide post is located, of the V-shaped guide groove, meanwhile, the first shifting piece and the second shifting piece are kept immovable, and the first output shaft and the second output shaft which are connected with the first shifting piece and the second shifting piece are kept immovable; when the driving is triggered: the electromagnet is powered on temporarily, the elastic force of a compression spring is overcome to cause the ejector rod to contract, so that the shifting block rotates, one end of the shifting block, which is provided with a pin shaft, moves downwards, the guide post moves downwards along the V-shaped guide groove and abuts against the bottom of the lower end of the separation blade in the moving process, the separation blade and the rotary disc are forced to rotate at a small angle, the guide post is separated from the bottom of the lower end of the separation blade and then is positioned at the bottom of the V-shaped guide groove, under the action of the spring and the elastic sheet, the rotary disc drives the separation blade to return to the original position, the separation blade continuously and partially shields the V-shaped guide groove at the end, one of the first shifting sheet and the second shifting sheet is kept still during the downward movement of the guide post, the other shifting sheet rotates correspondingly, then the electromagnet is powered off, the ejector rod extends under the action of the compression spring, so that the shifting block reversely rotates, one end, which is provided with the pin shaft, the guide post moves upwards along the V-shaped guide groove at the one end of the separation blade is partially shielded at the moment, the guide post pushes against the bottom of the lower end of the separation blade to move to the other end of the V-shaped guide groove and is positioned at the top of the other end of the V-shaped guide groove in the moving process, one of the corresponding first shifting sheet and the second shifting sheet correspondingly rotates, the other shifting sheet is kept still, meanwhile, the guide post pushes the turntable to push the turntable to rotate, the turntable drives the separation blade to rotate, so that the bottom of the lower end of the separation blade moves and partially shields the other end of the V-shaped guide groove, the connecting piece overcomes the pressure of the spring and the elastic sheet during the rotation of the turntable and drives the turntable to rotate towards the opposite direction, preparation is made for next trigger driving, and the guide post enters a conventional state after the movement is stopped; therefore, the control mechanism triggers the driving process once, so that the first shifting piece and the second shifting piece rotate in the same direction for a set angle, the driving requirements of the first output shaft and the second output shaft are met, the first output shaft and the second output shaft rotate for a specific angle and are kept, the electromagnet needs to be electrified only in the triggering driving process, the electromagnet does not need to be electrified in a conventional state, and the problem that when an original contactor acts, the contact coil continuously is electrified and generates heat to consume energy is solved.
Furthermore, the supporting plate is simultaneously provided with a limiting hole, and the limiting column is simultaneously positioned in the limiting hole.
Prevent that carousel and separation blade from excessively rotating to the position of accurate location separation blade bottom in V type guide way.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
1. compared with the mode that three contacts realize the switching of the star-delta circuit in the prior art, only one electric device replaces the original three electric devices, the occupied space of the electric devices is greatly reduced, the layout and the structure of an electric device box are intensified, and the manufacturing and using cost is greatly reduced;
2. the structure that the contact is locked and closed is adopted, so that the working mode that the existing switch contact is continuously attracted by the power on of the electromagnetic coil is cancelled, and the problem that the energy consumption is generated due to the continuous power on and heating of the contact coil when the original contactor acts is solved;
3. through the structure of intensification, simplified the connecting wire between the electrical part by a wide margin, made the cost and the fault incidence of switching circuit to and overhaul the degree of difficulty and effectively reduced, thereby reduced the maintenance cost by a wide margin.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention.
Fig. 2 is a schematic front view of the structure of fig. 1.
Fig. 3 is a schematic cross-sectional structural view of the first movable contact in fig. 1.
Fig. 4 is an enlarged schematic view of a portion a in fig. 1.
Fig. 5 is a schematic perspective view of the control mechanism.
Fig. 6 is a first schematic front view of the control mechanism.
Fig. 7 is a schematic front view of the control mechanism.
Fig. 8 is a first rear view structural diagram of the control mechanism.
Fig. 9 is a second schematic rear view of the control mechanism.
Fig. 10 is an exploded view of the trigger assembly.
Reference numerals:
1. a first moving contact; 2. a second moving contact;
101. a support; 102. a movable contact block; 103. a shaft lever; 104. a pin rod; 105. a long round hole; 106. a second elastic piece;
3. a first fixed contact; 4. a second fixed contact;
31. an insulating cover; 32. a contact; 33. a first elastic part;
5. a short contact;
6. a first terminal; 7. a second terminal; 8. a third terminal;
9. a control mechanism;
10. a first shift lever; 11. a first connecting rod;
12. a second deflector rod; 13. a second connecting rod;
14. an indicator mark;
15. an arc extinguishing device;
16. a support plate; 161. a V-shaped guide groove; 162. a limiting hole;
17. a trigger component; 171. an electromagnet; 172. a top rod; 173. shifting blocks; 174. a pin shaft; 175. a connecting rod; 1751. a guide post; 176. a guide sleeve; 177. a pressure spring;
18. a switching component; 181. a turntable; 1811. a limiting groove; 182. a baffle plate; 1821. a limiting column; 183. a fixed seat; 184. a connecting member; 185. a spring plate; 186. a spring;
19. a first shifting sheet; 191. a shaft hole; 192. a waist hole;
20. a second poking sheet;
21. a flexible wire; 22. copper bars are arranged.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Examples
As shown in fig. 1 to 4, an embodiment of the present invention provides a star delta activation apparatus, which includes: four actuating mechanism that set up side by side for connect three phase current and three phase motor, every actuating mechanism outside all is provided with the shell, and not shown in the concrete shell figure, actuating mechanism includes: the movable contact device comprises a first movable contact, a second movable contact, a first wiring end, a second wiring end and a third wiring end, wherein a first fixed contact is correspondingly arranged at the free end of the first movable contact, a second fixed contact and a short contact are correspondingly arranged on two sides of the free end of the second movable contact, the first wiring end is in flexible connection with the fixed end of the first movable contact, the second wiring end is in flexible connection with the first fixed contact, the third wiring end is in flexible connection with the fixed end of the second movable contact, and the first fixed contact is connected with the second fixed contact.
Specifically, the flexible connection is realized by adopting a flexible conductor, a first wiring end is connected with a first moving contact fixed end through the flexible conductor, a second wiring end is connected with a first fixed contact through the flexible conductor, a third wiring end is connected with a second moving contact fixed end through the flexible conductor, the first fixed contact and the second fixed contact are connected through the flexible conductor, a copper bar and the flexible conductor in sequence, and the copper bar is connected with the second wiring end through the flexible conductor as the first fixed contact is connected with the second wiring end;
wherein, short contact connects to a department through the copper bar short circuit among the actuating mechanism that sets up side by side.
The actuating mechanisms arranged side by side are respectively connected with three phase lines, namely first terminals arranged side by side are respectively connected with three-phase power supplies L1, L2 and L3, second terminals arranged side by side are respectively connected with three phases of U1, V1 and W1 of the motor, third terminals arranged side by side are respectively connected with three phases of W2, U2 and V2 of the motor, when the star connection is needed during starting, a first movable contact is connected with a first fixed contact to switch on the three-phase power supplies and the three-phase ends of U1, V1 and W1 of the motor, meanwhile, a second movable contact is connected with a short contact, a short contact in the actuating mechanisms is arranged side by side, the three-phase ends of U2, V2 and W2 of the motor are short-circuited to form the star connection, after a period of time, when the triangle connection needs to be switched, the second movable contact is separated from the short contact and is connected with a second fixed contact, and at the same time, because the second fixed contact is connected with the first fixed contact, the W2 of the motor connected with the third terminals, U2, V2 three-phase passes through the second static contact, the U1 of first static contact and motor, V1, W1 three-phase short circuit, later pass through first moving contact, first wiring end and three phase current's L1, L2, L3 three-phase connection, form the triangular connection, whole start switching process only need control two moving contacts rotate switch can, the quantity of electrical part has been reduced, the occupation space of electrical part has been reduced simultaneously, in addition, carry out the electricity connection inside actuating mechanism, reduce the connection of outside secondary line, the cost is reduced, reduce the trouble probability of occurence of failure and the maintenance degree of difficulty simultaneously.
In this embodiment, the actuator further includes a control mechanism, two output ends of the control mechanism are respectively connected to the first moving contact and the second moving contact, and the control mechanism is configured to drive the first moving contact and/or the second moving contact in the four actuating mechanisms to rotate synchronously.
Specifically, the control mechanism drives the first moving contacts and the second moving contacts in the executing mechanisms arranged side by side to rotate respectively, so that the four first moving contacts in the executing mechanisms arranged side by side are ensured to act in the same way, or the four second moving contacts are ensured to act in the same way, or the four first moving contacts and the four second moving contacts act in the same way simultaneously.
In this embodiment, the device further comprises a transmission mechanism arranged corresponding to the execution mechanism, the transmission mechanism is connected with the output end of the control mechanism and the execution mechanism, and the transmission mechanism transmits the driving force of the output end of the control mechanism to the first moving contact and the second moving contact in the execution mechanism to drive the two moving contacts to rotate;
as shown in fig. 2, the transmission mechanism includes: the first driving lever and the first connecting rod are connected between the output end of the control mechanism and the first moving contact, and the second driving lever and the second connecting rod are connected between the other output end of the control mechanism and the second moving contact;
specifically, the middle of the first driving lever is connected with the output end of the control mechanism, the first end of the first connecting rod is hinged to the first end of the first driving lever, the second end of the first connecting rod is hinged to the first moving contact, the middle of the second driving lever is connected to the other output end of the control mechanism, the first end of the second connecting rod is hinged to the first end of the second driving lever, the second end of the second connecting rod is hinged to the second moving contact, the output end of the control mechanism penetrates through a plurality of transmission mechanisms to drive the first moving contact and/or the second moving contact to rotate synchronously, the output end of the control mechanism drives the driving lever to rotate around the output end when rotating, and the driving lever pushes and pulls the connecting rod to further drive the moving contact to rotate around the fixed end of the moving contact, so that a short contact head or a vacant position below the fixed contact head above the moving contact is contacted.
The first moving contact and the second moving contact are driven to act through the transmission mechanism, linkage cooperation of a multi-way switch is omitted, and switching consistency of two loops is guaranteed.
The control mechanism is also connected with a circuit chip, and the control mechanism is driven by a signal sent by the circuit chip, wherein the circuit chip is not shown in the figure, as shown in fig. 5-10, the control mechanism comprises a supporting plate, a triggering assembly, a switching assembly, a first shifting sheet and a second shifting sheet, the triggering assembly comprises an electromagnet, a mandril, a shifting block, a pin shaft and a connecting rod, and the switching assembly comprises a turntable, a blocking sheet, a fixed seat, a connecting piece and an elastic sheet; the supporting plate is provided with a V-shaped guide groove, the electromagnet is arranged in the guide sleeve, one end of the ejector rod is arranged in the guide sleeve, a pressure spring is arranged between the ejector rod and the electromagnet, the other end of the ejector rod is hinged with one end of the shifting block, the middle part of the shifting block is connected to the supporting plate in a shaft mode, the other end of the shifting block is connected with the pin shaft, one end of the connecting rod is hinged with the pin shaft, the other end of the connecting rod is provided with a guide post, and the guide post is located in the V-shaped guide groove; the turntable and the blocking piece are coaxially coupled to the support plate, a limiting groove is arranged at the upper part of the turntable, a notch is arranged below the turntable, the guide post is simultaneously positioned in the notch, a limiting post is arranged at the upper end of the blocking piece, the limiting post is positioned in the limiting groove, the forward projection part at the bottom of the lower end of the blocking piece shields the forward projection of the V-shaped guide groove, a gap is reserved between the forward projection part and the inner wall of the V-shaped guide groove, the fixing seat is fixed on the support plate, one end of the elastic piece is fixed on the support plate, the other end of the elastic piece is connected with the fixing seat through a spring, one end of the connecting piece is hinged to the turntable, the other end of the connecting piece is hinged to the elastic piece, one ends of the first shifting piece and the second shifting piece are respectively and coaxially connected to the support plate, and a first output shaft and a second output shaft which are respectively and are coaxially connected to the first moving contact and the second moving contact, the other ends of the first shifting piece and the second shifting piece are respectively provided with a waist hole, and the guide post is simultaneously positioned in the waist holes of the first shifting piece and the second shifting piece.
The control mechanism has two states of normal state and trigger driving, wherein in the normal state: the electromagnet is not electrified, the push rod enables one end, provided with the pin shaft, of the shifting block to keep an upward posture under the action of the pressure spring, so that the guide post is located at the top of one end of the V-shaped guide groove, the bottom of the lower end of the blocking piece is located at one end, where the guide post is located, of the V-shaped guide groove, meanwhile, the first shifting piece and the second shifting piece are kept immovable, and the first output shaft and the second output shaft which are connected with the first shifting piece and the second shifting piece are kept immovable; when the driving is triggered: the electromagnet is powered on temporarily, the elastic force of a compression spring is overcome to cause the ejector rod to contract, so that the shifting block rotates, one end of the shifting block, which is provided with a pin shaft, moves downwards, the guide post moves downwards along the V-shaped guide groove and abuts against the bottom of the lower end of the separation blade in the moving process, the separation blade and the rotary disc are forced to rotate at a small angle, the guide post is separated from the bottom of the lower end of the separation blade and then is positioned at the bottom of the V-shaped guide groove, under the action of the spring and the elastic sheet, the rotary disc drives the separation blade to return to the original position, the separation blade continuously and partially shields the V-shaped guide groove at the end, one of the first shifting sheet and the second shifting sheet is kept still during the downward movement of the guide post, the other shifting sheet rotates correspondingly, then the electromagnet is powered off, the ejector rod extends under the action of the compression spring, so that the shifting block reversely rotates, one end, which is provided with the pin shaft, the guide post moves upwards along the V-shaped guide groove at the one end of the separation blade is partially shielded at the moment, the guide post pushes against the bottom of the lower end of the separation blade to move to the other end of the V-shaped guide groove and is positioned at the top of the other end of the V-shaped guide groove in the moving process, one of the corresponding first shifting sheet and the second shifting sheet correspondingly rotates, the other shifting sheet is kept still, meanwhile, the guide post pushes the turntable to push the turntable to rotate, the turntable drives the separation blade to rotate, so that the bottom of the lower end of the separation blade moves and partially shields the other end of the V-shaped guide groove, the connecting piece overcomes the pressure of the spring and the elastic sheet during the rotation of the turntable and drives the turntable to rotate towards the opposite direction, preparation is made for next trigger driving, and the guide post enters a conventional state after the movement is stopped; therefore, the control mechanism triggers the driving process once, so that the first shifting piece and the second shifting piece rotate in the same direction for a set angle, the driving requirements of the first output shaft and the second output shaft are met, the first output shaft and the second output shaft rotate for a specific angle and are kept, the electromagnet needs to be electrified only in the triggering driving process, the electromagnet does not need to be electrified in a conventional state, and the problem that when an original contactor acts, the contact coil continuously is electrified and generates heat to consume energy is solved.
The backup pad is provided with spacing hole simultaneously, spacing post is located simultaneously spacing downthehole prevents that carousel and separation blade from excessively rotating to the position of accurate location separation blade bottom in V type guide way.
And the second end parts of the first deflector rod and the second deflector rod are respectively provided with a two-color indicator.
The rotating positions of the first shifting lever and the second shifting lever are judged through color code colors of the end parts of the first shifting lever and the second shifting lever, so that the current wiring mode, namely the working state of the motor, is conveniently judged.
In this embodiment, as shown in fig. 2 and 4, the first fixed contact and the second fixed contact are the same in structure, and the first fixed contact includes: the contact is installed in the insulating cover through an elastic element I, a first wiring end connected with the first fixed contact through a flexible conductor is connected with the contact end and the first wiring end through a flexible conductor, the elastic element I can be used for pushing the contact to the first moving contact through a spring and the like, and the contact when the contact is contacted with the moving contact is pushed to the moving contact through the elastic element I between the insulating cover and the contact, so that the contact is ensured to be fully contacted with the moving contact.
In this embodiment, as shown in fig. 3, the first movable contact has the same structure as the second movable contact, and the first movable contact includes: the opening of the support is opposite to the direction of the first stationary contact, the movable contact block is installed in the support, the fixed end of the movable contact block is fixed with the support in a pin joint mode through a shaft rod, a long round hole used for being connected with the support through a pin rod is formed in the middle of the movable contact block, the pin rod is located in the long round hole and connected with the second end of a connecting rod in the transmission mechanism, and an elastic piece II used for pushing the movable contact block to rotate around the pin joint is arranged between the support and the movable contact block.
The movable contact block is arranged in the support, the long round hole formed in the middle of the movable contact block is connected with the support through the pin rod, a certain redundant angle is formed between the movable contact block and the support when the movable contact block rotates around the fixed end shaft rod, and when the movable contact block is pushed to rotate around the fixed end by the elastic piece II arranged between the movable contact block and the support, the free end of the movable contact block is pressed downwards to contact with the short contact head below the free end of the movable contact block, so that good contact between the movable contact block and the short contact head is guaranteed.
The first moving contact and the second moving contact are arranged oppositely, and an arc extinguishing device is arranged between the first moving contact and the second moving contact.
The arc extinguishing device is used for guiding and discharging contact electric arcs, and the two moving contacts are arranged oppositely, so that the overall size of the actuating mechanism is reduced due to reasonable layout.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
1. compared with the mode that three contacts realize the switching of the star-delta circuit in the prior art, only one electric device replaces the original three electric devices, the occupied space of the electric devices is greatly reduced, the layout and the structure of an electric device box are intensified, and the manufacturing and using cost is greatly reduced;
2. the structure that the contact is locked and closed is adopted, so that the working mode that the existing switch contact is continuously attracted by the power on of the electromagnetic coil is cancelled, and the problem that the energy consumption is generated due to the continuous power on and heating of the contact coil when the original contactor acts is solved;
3. through the structure of intensification, simplified the connecting wire between the electrical part by a wide margin, made the cost and the fault incidence of switching circuit to and overhaul the degree of difficulty and effectively reduced, thereby reduced the maintenance cost by a wide margin.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A star delta activation device, comprising: a plurality of actuating mechanism that set up side by side, actuating mechanism includes:
the free end of the first moving contact is correspondingly provided with a first fixed contact;
the two sides of the free end of the second moving contact are correspondingly provided with a second fixed contact and a short contact;
the first terminal is in flexible connection with the fixed end of the first moving contact;
a second terminal in flexible connection with the first stationary contact;
the third terminal is in flexible connection with the fixed end of the second moving contact;
the first fixed contact is connected with the second fixed contact.
2. The star-delta activation device according to claim 1, further comprising a control mechanism, wherein two output ends of the control mechanism are respectively connected to the first moving contact and the second moving contact, and are used for driving the first moving contact and/or the second moving contact in the plurality of the actuator to synchronously rotate.
3. The star-delta activation device of claim 2,
still include with actuating mechanism corresponds the drive mechanism who sets up, drive mechanism includes:
the middle part of the first deflector rod is connected with the output end of the control mechanism;
a first end of the first connecting rod is hinged with a first end of the first driving lever, and a second end of the first connecting rod is hinged with the first moving contact;
the middle part of the second deflector rod is connected with the other output end of the control mechanism;
the first end of the second connecting rod is hinged with the first end of the second driving lever, and the second end of the second connecting rod is hinged with the second moving contact;
the output end of the control mechanism penetrates through the transmission mechanisms to drive the first moving contact and/or the second moving contact to synchronously rotate.
4. The star-delta activation device according to claim 3, wherein the second end portions of the first and second shift levers are respectively provided with a two-color indicator.
5. The star-delta activation device according to claim 1, wherein the first stationary contact and the second stationary contact are identical, and the first stationary contact comprises:
an insulating cover;
the contact is arranged in the insulating cover through a first elastic piece, and the first elastic piece is used for ejecting the contact to the first movable contact.
6. The star-delta activation device of claim 1, wherein the first movable contact is the same as the second movable contact structure, the first movable contact comprising:
a bracket, the bracket opening facing away from the first stationary contact direction;
the movable contact block is installed in the support, the fixed end of the movable contact block is fixed with the support through a shaft lever in a pivoted mode, a long round hole used for being connected with the support through a pin rod is formed in the middle of the movable contact block, and an elastic piece II used for pushing the movable contact block to rotate around the pivoted position is arranged between the support and the movable contact block.
7. The star-delta connection device as claimed in claim 1, wherein the first movable contact and the second movable contact are disposed opposite to each other with an arc extinguishing device disposed therebetween.
8. The star-delta starting device according to claim 2, wherein the control mechanism comprises a supporting plate, a triggering component, a switching component, a first shifting piece and a second shifting piece, the triggering component comprises an electromagnet, a mandril, a shifting block, a pin shaft and a connecting rod, and the switching component comprises a rotary disc, a blocking piece, a fixed seat, a connecting piece and an elastic sheet; the supporting plate is provided with a V-shaped guide groove, the electromagnet is arranged in the guide sleeve, one end of the ejector rod is arranged in the guide sleeve, a pressure spring is arranged between the ejector rod and the electromagnet, the other end of the ejector rod is hinged with one end of the shifting block, the middle part of the shifting block is connected to the supporting plate in a shaft mode, the other end of the shifting block is connected with the pin shaft, one end of the connecting rod is hinged with the pin shaft, the other end of the connecting rod is provided with a guide post, and the guide post is located in the V-shaped guide groove; the turntable and the blocking piece are coaxially coupled to the support plate, a limiting groove is arranged at the upper part of the turntable, a notch is arranged below the turntable, the guide post is simultaneously positioned in the notch, a limiting post is arranged at the upper end of the blocking piece, the limiting post is positioned in the limiting groove, the forward projection part at the bottom of the lower end of the blocking piece shields the forward projection of the V-shaped guide groove, a gap is reserved between the forward projection part and the inner wall of the V-shaped guide groove, the fixing seat is fixed on the support plate, one end of the elastic piece is fixed on the support plate, the other end of the elastic piece is connected with the fixing seat through a spring, one end of the connecting piece is hinged to the turntable, the other end of the connecting piece is hinged to the elastic piece, one ends of the first shifting piece and the second shifting piece are respectively and coaxially connected to the support plate, and a first output shaft and a second output shaft which are respectively and are coaxially connected to the first moving contact and the second moving contact, the other ends of the first shifting piece and the second shifting piece are respectively provided with a waist hole, and the guide post is simultaneously positioned in the waist holes of the first shifting piece and the second shifting piece.
9. The star-delta connection of claim 8, wherein the support plate is also provided with a limit hole, and the limit post is also located in the limit hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110867822.XA CN113451078A (en) | 2021-07-29 | 2021-07-29 | Star-delta starting drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110867822.XA CN113451078A (en) | 2021-07-29 | 2021-07-29 | Star-delta starting drive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113451078A true CN113451078A (en) | 2021-09-28 |
Family
ID=77817720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110867822.XA Withdrawn CN113451078A (en) | 2021-07-29 | 2021-07-29 | Star-delta starting drive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113451078A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116364479A (en) * | 2023-03-27 | 2023-06-30 | 嘉兴正誉电气有限公司 | Three-phase synchronous high-voltage contactor for rail transit permanent magnet motor |
-
2021
- 2021-07-29 CN CN202110867822.XA patent/CN113451078A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116364479A (en) * | 2023-03-27 | 2023-06-30 | 嘉兴正誉电气有限公司 | Three-phase synchronous high-voltage contactor for rail transit permanent magnet motor |
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