CN111521931B - Contact material simulation test device based on vortex repulsive force mechanism and working method thereof - Google Patents
Contact material simulation test device based on vortex repulsive force mechanism and working method thereof Download PDFInfo
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- CN111521931B CN111521931B CN202010440637.8A CN202010440637A CN111521931B CN 111521931 B CN111521931 B CN 111521931B CN 202010440637 A CN202010440637 A CN 202010440637A CN 111521931 B CN111521931 B CN 111521931B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 49
- 239000000463 material Substances 0.000 title claims abstract description 37
- 238000012360 testing method Methods 0.000 title claims abstract description 31
- 238000004088 simulation Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000003068 static effect Effects 0.000 claims abstract description 14
- 239000012212 insulator Substances 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 11
- 229910052802 copper Inorganic materials 0.000 claims description 11
- 239000010949 copper Substances 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 229910002804 graphite Inorganic materials 0.000 claims description 10
- 239000010439 graphite Substances 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000009471 action Effects 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 3
- 230000001133 acceleration Effects 0.000 abstract description 2
- 230000004044 response Effects 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 description 13
- 229910000838 Al alloy Inorganic materials 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000011160 research Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The invention relates to a contact material simulation test device based on an eddy-current repulsive force mechanism and a working method thereof, wherein the contact material simulation test device comprises a base, a contact clamp positioned above the base and an eddy-current repulsive force mechanism arranged at the right end of the base, wherein the contact clamp comprises a fixed contact clamp and a movable contact clamp which are distributed oppositely left and right; the eddy current repulsive force mechanism comprises a breaking coil disc, a repulsive force disc and an attraction coil disc which are sequentially arranged from left to right, the middle of the repulsive force disc is connected with the moving contact through a connecting piece, and the attraction coil disc is connected with an opening distance adjusting mechanism for adjusting the distance between the attraction coil disc and the breaking coil disc. The invention adopts the eddy current repulsive force mechanism to drive the closing and breaking of the moving and static contacts, and the eddy current repulsive force mechanism has simple structure, small volume, short repulsive force forming and action response time and high acceleration, so the stepless adjustment of the closing speed and breaking speed of the contacts in a large range is easy to realize through a driving circuit, and the defects of the current contact material electrical property simulation test device can be overcome.
Description
Technical field:
the invention belongs to the technical field of switching appliances, and particularly relates to a contact material simulation test device based on an eddy-current repulsive force mechanism and a working method thereof.
The background technology is as follows:
In recent years, with the rapid development of new energy systems and smart grids, low-voltage distribution systems are transformed and upgraded to be intelligent, and the requirements on the power level and the electric life of a breaking circuit are higher and higher, so that the switching electric appliance is required to comprehensively improve the capability of rapid arc quenching and contact fusion welding resistance and arc erosion resistance. The breaking speed of the contacts of the AC/DC switch electrical appliance is reasonably improved, the closing speed of the contacts is optimized, the contact materials and the pairing modes thereof are improved, and the capabilities of fusion welding resistance, arc erosion resistance and quick arc extinction of the contacts of the AC/DC switch electrical appliance can be effectively improved. Therefore, the simulation test research of the electrical performance of the contact material is necessary for the AC/DC switching apparatus.
However, the conventional contact material electrical performance simulation test device has the defects of poor universality, limited contact closing and breaking speed adjustment range, complex structure, large volume and the like, so that the development of the contact material electrical performance simulation test device with wide application range, large speed adjustment range and small volume is required.
The invention comprises the following steps:
The invention aims at improving the problems existing in the prior art, namely the technical problem to be solved by the invention is to provide a contact material simulation test device based on an eddy-current repulsive force mechanism and a working method thereof, so as to solve the problems of smaller closing and breaking speed adjusting range and limited application range of the conventional contact material simulation test device.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the contact material simulation test device based on the eddy-current repulsive force mechanism comprises a base, a contact clamp positioned above the base and an eddy-current repulsive force mechanism arranged at the right end of the base, wherein the contact clamp comprises a fixed contact clamp and a movable contact clamp which are distributed oppositely left and right; the eddy current repulsive force mechanism comprises a shell, a breaking coil disc, a repulsive force disc and an attraction coil disc are sequentially arranged in the shell from left to right, the middle of the repulsive force disc is connected with a moving contact through a connecting piece, and an opening distance adjusting mechanism for adjusting the distance between the attraction coil disc and the breaking coil disc is connected to the attraction coil disc.
Further, the distance adjusting mechanism comprises a distance adjusting bolt and a lock nut which is in threaded connection with the distance adjusting bolt, the distance adjusting bolt penetrates through the center of the right end face of the shell and is in threaded connection with the middle of the suction coil disc, and the lock nuts are a pair and are respectively arranged on the inner side and the outer side of the right end face of the shell.
Further, the connecting piece comprises a guide rod, a connecting shaft and a first insulator, wherein the guide rod penetrates through the left end face of the shell in a sliding mode, the right end of the guide rod penetrates through the breaking coil disc and is in threaded connection with the middle of the repulsive force disc, and a blind hole is formed in the middle of the left end face of the guide rod; the connecting shaft is arranged between the moving contact clamp and the guide rod, a first insulator is fixedly connected between the left end of the connecting shaft and the moving contact clamp, and the right end of the connecting shaft stretches into the blind hole and is in sliding fit with the blind hole.
Further, the connecting shaft is in a step shape with a large left end diameter and a small right end diameter, a spring assembly is connected between the shaft shoulder of the connecting shaft and the left end face of the guide rod, the spring assembly comprises a first spring seat, a second spring seat and a contact spring, the first spring seat is fixedly arranged on the left end face of the guide rod, the second spring seat is fixedly arranged on the shaft shoulder of the connecting shaft, and one end of the contact spring is fixedly arranged on the first spring seat, and the other end of the contact spring is fixedly arranged on the second spring seat; the flange graphite copper sleeve is fixedly connected to the center of the left end face of the shell, and the flange graphite copper sleeve is in sliding fit with the connecting shaft.
Further, a transverse screw rod sliding block mechanism is arranged on the base, a screw rod of the transverse screw rod sliding block mechanism is driven to rotate by a hand wheel, a lifting block is fixedly connected to the top surface of a sliding block of the transverse screw rod sliding block mechanism, a support fixing seat is fixedly connected to the top surface of the lifting block, a connecting rod which is transversely arranged is fixed on the support fixing seat, and a second insulator is connected between the right end surface of the connecting rod and the fixed contact clamp; and the rear end of the sliding block of the transverse screw rod sliding block mechanism is connected with a sliding block locking screw in a threaded manner.
Further, a first mounting hole for mounting the moving contact is formed in the left end face of the moving contact clamp, a first clamping notch is formed in the side wall of the first mounting hole, and moving contact fixing screws for locking the moving contact penetrate through threads at the upper end and the lower end of the first clamping notch; a first binding post is arranged on the side surface of the movable contact clamp; the right end face of the static contact clamp is provided with a second mounting hole for mounting the static contact, the side wall of the second mounting hole is provided with a second clamping notch, and the threads at the upper end and the lower end of the second clamping notch penetrate through static contact fixing screws for locking the static contact; and a second binding post is arranged on the side surface of the fixed contact clamp.
Further, still have on the base and be the protection casing that "冂" font was linked firmly, the left end of moving contact anchor clamps and the right-hand member of static contact anchor clamps all stretch into the protection casing inside, first terminal and second terminal all are located the inside of protection casing.
Further, the attraction coil disc comprises a round attraction coil disc framework, annular attraction coils and attraction coil disc permanent magnets, the attraction coils are embedded into the attraction coil disc framework, the attraction coil disc permanent magnets are four and uniformly distributed around the circumference of the axis of the attraction coil disc framework, and the attraction coil disc permanent magnets are positioned at the outer sides of the attraction coils and are embedded into the attraction coil disc framework; the breaking coil disc comprises a square breaking coil disc framework, annular breaking coils and breaking coil disc permanent magnets, wherein the breaking coils are embedded into the breaking coil disc framework, the number of the breaking coil disc permanent magnets is four and are uniformly distributed around the circumference of the axis of the breaking coil disc framework, and the breaking coil disc permanent magnets are positioned on the outer side of the breaking coils and are embedded into the breaking coil disc framework; the repulsion tray comprises an annular repulsion tray framework, a circular metal tray and a repulsion tray permanent magnet, wherein the metal tray is embedded into the repulsion tray framework, the left end face and the right end face of the metal tray are respectively flush with the left end face and the right end face of the repulsion tray framework, the number of the repulsion tray permanent magnets is four, the repulsion tray permanent magnets are uniformly distributed around the circumference of the axis of the repulsion tray framework, and the repulsion tray permanent magnets are located on the outer side of the metal tray and embedded into the repulsion tray framework.
Further, the machine also comprises four upper convex ribs and four lower convex ribs, wherein the four upper convex ribs are arranged at the upper ends of the front and rear inner walls of the machine shell, and the four lower convex ribs are arranged at the lower ends of the front and rear inner walls of the machine shell; the breaking coil disc framework is arranged between the upper convex rib and the lower convex rib; the upper end cover of the shell is detachable, and the rear side wall of the shell is provided with a penetrating hole which is used for facilitating the breaking of the wire end and the wire tail of the coil panel and a penetrating notch which is used for facilitating the sucking of the wire end and the wire tail of the coil panel, so that the driving circuit can be conveniently connected.
The invention adopts another technical scheme that: a working method of a contact material simulation test device based on an eddy-current repulsive force mechanism comprises the following steps: when the attraction coil flows instantaneous strong pulse current, the generated huge eddy repulsive force enables the repulsive force disc to move in a direction away from the attraction coil disc, and the repulsive force disc drives the moving contact to move in a direction close to the fixed contact through the connecting piece and the moving contact clamp until the moving contact and the fixed contact are in stable contact, at the moment, the left side surfaces of the four permanent magnets of the repulsive force disc are in one-to-one superposition with the surfaces of the four permanent magnets of the breaking coil disc, so that the moving contact and the fixed contact are kept in stable contact, and the repulsion of the moving contact due to electric repulsive force between the moving contact and the fixed contact and the elastic force after the contact spring is compressed is prevented; when the breaking coil flows through the instantaneous strong pulse current, the generated huge eddy repulsive force enables the repulsive force disc to move in the direction away from the breaking coil disc, the repulsive force disc drives the moving contact to move in the direction away from the fixed contact through the connecting piece and the moving contact clamp and return to the initial position, at the moment, the right side surfaces of the four permanent magnets of the repulsive force disc are overlapped with the surfaces of the four permanent magnets of the suction coil disc one by one, so that the moving contact returns to the initial position, and the next closing of the moving contact and the fixed contact is facilitated, and therefore the closing and breaking functions of the contact can be realized.
Compared with the prior art, the invention has the following effects: the invention has reasonable design, can simulate the action process of contact systems of various switching appliances, can adjust the opening distance of the moving contact, realize the clamping of contacts with different specifications, realize the stepless adjustment of the large-scale closing speed and breaking speed of the contacts, is convenient for analyzing the influence of different closing and breaking speeds on the electrical performance of the contact materials, and is suitable for the simulation test research of the electrical performance of the contact materials of switching appliances with various capacities.
Description of the drawings:
FIG. 1 is a schematic perspective view of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a front view configuration of an embodiment of the present invention;
FIG. 3 is a schematic view of a bottom view configuration of an embodiment of the present invention;
FIG. 4 is a schematic diagram showing a front view of a distance adjusting mechanism according to an embodiment of the present invention;
Fig. 5 is a schematic perspective view of a breaking coil panel according to an embodiment of the present invention;
Fig. 6 is a schematic perspective view of an attracting coil panel according to an embodiment of the present invention;
fig. 7 is a schematic perspective view of a repulsive force disc according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a front view of a connector in accordance with an embodiment of the present invention;
fig. 9 is a schematic perspective view of a spring assembly according to an embodiment of the present invention.
In the figure:
1-an aluminum alloy bottom plate; 2-base support feet; 3-fixing blocks; 4-a first baffle; 5-a second baffle; 6-a first optical axis; 7-a second optical axis; 8-a screw rod; 9-a hand wheel; 10-sliding blocks; 11-a slider locking screw; 12-a shell; 121-an upper end cap; 122-a through hole; 123-out of the notch; 13-a distance adjusting bolt; 14-locking nut; 15-an attracting coil panel; 151-an attracting coil panel framework; 152-an attracting coil; 153-attracting coil disc permanent magnet; 16-upward convex ribs; 17-lower convex ribs; 18-breaking a coil disc; 181-breaking a coil panel framework; 182-breaking the coil; 183-breaking coil disc permanent magnet; 19-flange graphite copper sleeve; 20-repulsive force disc; 201-repulsive force disc skeleton; 202-repulsive force disc permanent magnet; 203-a metal disc; 21-a guide rod; 211-blind holes of guide rods; 22-a first spring seat; 23-contact springs; 24-a second spring seat; 25-connecting shaft; 26-a first insulator; 27-a moving contact clamp; 28-a first binding post; 29-a moving contact fixing screw; 30-moving contact; 31-heightening the block; 32-a bracket fixing seat; 33-connecting rods; 34-a second insulator; 35-a static contact clamp; 36-a second binding post; 37-fixed contact fixing screws; 38-a fixed contact; 39-protecting cover; 40-base; 41-first clamping notch.
The specific embodiment is as follows:
the invention will be described in further detail with reference to the drawings and the detailed description.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
As shown in fig. 1 to 9, the contact material simulation test device based on the eddy-current repulsive force mechanism is used for simulation test research of the electrical properties of contact materials of various switching devices, can provide conditions for testing and testing of the contact materials of various switching devices, and further provides basis for selection and design of the contact materials of various switching devices, and the structure of the contact material simulation test device comprises a base 40, a contact clamp positioned above the base 40 and an eddy-current repulsive force mechanism arranged at the right end of the base, wherein the contact clamp comprises a fixed contact clamp 35 and a movable contact clamp 27 which are distributed in a left-right opposite manner, the fixed contact clamp 35 is used for installing a fixed contact 38, and the movable contact clamp 27 is used for installing a movable contact 30; the eddy current repulsive force mechanism comprises a machine shell 12, a breaking coil disc 18, a repulsive force disc 20 and an attraction coil disc 15 are sequentially arranged in the machine shell 12 from left to right, the middle of the repulsive force disc 20 is connected with a moving contact 30 through a connecting piece, and an opening distance adjusting mechanism for adjusting the distance between the attraction coil disc 15 and the breaking coil disc 18 is connected to the attraction coil disc 15. When the device works, the eddy current repulsive force of the eddy current repulsive force mechanism is utilized to drive the repulsive force disc to move between the attraction coil disc and the breaking coil disc, and the connecting piece drives the moving contact clamp to synchronously move in the moving process of the repulsive force disc, so that the closing and breaking between the moving contact and the fixed contact can be realized; the contact closing speed can be changed by adjusting the magnitude of the instantaneous strong pulse current fed into the attraction coil 152 through the driving circuit; the contact breaking speed can be changed by adjusting the magnitude of the instantaneous strong pulse current which is fed into the breaking coil 182 through the driving circuit.
In this embodiment, as shown in fig. 1,2 and 4, the distance adjusting mechanism includes a distance adjusting bolt 13 and a lock nut 14 screwed with the distance adjusting bolt 13, where the distance adjusting bolt 13 penetrates through the center of the right end face of the casing 12 and is screwed with the middle of the suction coil disc 15, and the lock nuts 14 are a pair and are respectively disposed on the inner and outer sides of the right end face of the casing 12. By adjusting the position of the opening adjusting bolt 13, the position of the attraction coil disc 15 screwed with the opening adjusting bolt 13 is changed, so that the distance between the attraction coil disc 15 and the breaking coil disc 18 is changed, namely the moving range of the repulsive force disc 20 is changed, and the opening distance of the movable contact and the fixed contact is further changed.
In this embodiment, as shown in fig. 1,2, 8 and 9, the connecting piece includes a guide rod 21, a connecting shaft 25 and a first insulator 26, where the guide rod 21 penetrates through the center of the left end face of the casing 12 in a sliding manner, and the right end of the guide rod 21 penetrates through the middle of the breaking coil disc 18 in a sliding manner and then is screwed with the middle of the repulsive force disc 20, and a blind hole 211 is formed in the middle of the left end face of the guide rod 21; the connecting shaft 25 is arranged between the moving contact clamp 27 and the guide rod 21, the connecting shaft 25 is in a stepped shape with a large left end diameter and a small right end diameter, the left end of the connecting shaft 25 is in threaded connection with the right end of the first insulator 26, the left end of the first insulator 26 is in threaded connection with the right end of the moving contact clamp 27, and the right end of the connecting shaft 25 extends into the blind hole 211 and is in sliding fit with the blind hole 211. In order to make the movable contact 30 and the fixed contact 38 have a pressure after being closed, a spring assembly is connected between the shaft shoulder of the connecting shaft 25 and the left end face of the guide rod, the spring assembly comprises a first spring seat 22, a second spring seat 24 and a contact spring 23, the first spring seat 22 is fixedly arranged on the left end face of the guide rod 21, the second spring seat 24 is fixedly arranged on the shaft shoulder of the connecting shaft 25, and one end of the contact spring 23 is fixedly arranged on the first spring seat 22, and the other end of the contact spring 23 is fixedly arranged on the second spring seat 24.
In this embodiment, a flange graphite copper sleeve 19 is fixedly connected to the center of the left end face of the casing 12, and the flange graphite copper sleeve 19 is in sliding fit with the connecting shaft 25. The flange graphite copper sleeve 19 can effectively fix the positions of the guide rod 21 with the blind hole, the first spring seat 22, the second spring seat 24 and the connecting shaft 25, so that the direction deviation caused by the reciprocating motion is reduced; on the other hand, the flange graphite copper sleeve 19 has self-lubricating property, and can effectively reduce friction force when the guide rod 21 with the blind hole, the first spring seat 22, the second spring seat 24 and the connecting shaft 25 reciprocate in the guide rod.
In this embodiment, as shown in fig. 1 and 2, the base 40 is provided with a transverse screw rod slider mechanism, the transverse screw rod slider mechanism includes a first optical axis 6, a second optical axis 7, a screw rod 8 and a slider 10, the screw rod 8 is transversely arranged, the first optical axis 6 and the second optical axis 7 are parallel to each other and are disposed on the front and rear sides of the screw rod plate, the middle part of the slider 10 is in threaded connection with the screw rod 8, and the front and rear ends of the slider 10 are sequentially penetrated by the first optical axis 6, the screw rod 8 and the second optical axis 7 in a sliding manner. In order to facilitate the movement of the driving slide block 10, a hand wheel 9 is fixedly connected to the left end of the screw rod 8, and the screw rod 8 is manually driven to rotate through the hand wheel 9 so as to drive the slide block 10 to move transversely; in order to fix the position of the sliding block conveniently, the rear end of the sliding block 10 is in threaded connection with a sliding block locking screw 11, and the sliding block locking screw 11 locks the sliding block 10 on the second optical axis 7 longitudinally. The top surface of the sliding block 10 is fixedly connected with a heightening block 31, the top surface of the heightening block 31 is fixedly connected with a bracket fixing seat 32, a connecting rod 33 transversely arranged is fixed on the bracket fixing seat 32, and a second insulator 34 is connected between the right end surface of the connecting rod 33 and a static contact clamp 35. The position of the sliding block 10 is changed through the hand wheel 9, so that the distance between the moving contact and the fixed contact can be changed, and the moving contact and the fixed contact can be replaced conveniently.
In this embodiment, as shown in fig. 1, 2 and 3, the base includes an aluminum alloy bottom plate 1, and base supporting feet 2 are respectively fixed around the bottom surface of the aluminum alloy bottom plate 1. The right-hand member of aluminum alloy bottom plate 1 is fixed firmly fixed with fixed block 3, casing 12 fixed mounting is at fixed block 3 top surface, the side of fixed block 3 is equipped with the first baffle 4 of fixing at aluminum alloy bottom plate 1, and the left end of aluminum alloy bottom plate 1 is fixed firmly with second baffle 5. The transverse screw rod sliding block mechanism is arranged between the first baffle 4 and the second baffle 5, the right ends of the first optical axis 6 and the second optical axis 7 penetrate through the first baffle 4 and are flush with the right end face of the first baffle 4, the left ends of the first optical axis 6 and the second optical axis 7 penetrate through the second baffle 5 and are flush with the left end face of the second baffle 5, the right ends of the screw rods 8 penetrate through the first baffle 4 and are flush with the right end face of the first baffle 4, and the left ends of the screw rods 8 penetrate through the second baffle 5 and are linked with the hand wheels 9.
In this embodiment, a first mounting hole for mounting the moving contact is formed in the left end face of the moving contact fixture 27, a first clamping notch 41 is formed in the side wall of the first mounting hole, and moving contact fixing screws 29 for locking the moving contact 30 are threaded through the upper and lower ends of the first clamping notch 41; a first binding post 28 is arranged on the side surface of the movable contact clamp 27; the right end face of the fixed contact clamp 35 is provided with a second mounting hole for mounting the fixed contact 38, the side wall of the second mounting hole is provided with a second clamping notch, and the upper end and the lower end of the second clamping notch are threaded through with fixed contact fixing screws 37 for locking the fixed contact 38; the side of the stationary contact clamp 35 is provided with a second binding post 36. The first terminal 28 and the second terminal 36 are connectable to an external circuit, and form a contact circuit together with the moving contact clamp 27, the moving contact fixing screw 29, the moving contact 30, the fixed contact 38, the fixed contact fixing screw 37, and the fixed contact clamp 35. By replacing the moving contact clamp 27 and the fixed contact clamp 35 with different specifications, the moving contact 30 and the fixed contact 38 with different specifications can be clamped.
In this embodiment, the base 40 is further fixedly connected with a protective cover 39 in a shape of 冂', the protective cover 39 is fixed on the front and rear end surfaces of the aluminum alloy bottom plate 1 by screws, the left end of the moving contact clamp 27 and the right end of the fixed contact clamp 35 both extend into the protective cover 39, the first binding post 28 and the second binding post 36 can be located in or outside the protective cover 39, the protective cover 39 can prevent electric arc from splashing, and safety is ensured.
In this embodiment, as shown in fig. 6, the attraction coil 15 includes a circular attraction coil bobbin 151, a ring-shaped attraction coil 152, and a cylindrical attraction coil permanent magnet 153, the attraction coil 152 is embedded in the attraction coil bobbin 151, the attraction coil permanent magnets 153 are four and circumferentially distributed around the axis of the attraction coil bobbin 151, and the attraction coil permanent magnet 153 is located outside the attraction coil 152 and is embedded in the attraction coil bobbin 151.
In this embodiment, as shown in fig. 5, the breaking coil 18 includes a square-shaped breaking coil bobbin 181, a ring-shaped breaking coil 182, and a cylindrical breaking coil permanent magnet 183, the breaking coil 182 is embedded into the breaking coil bobbin 181, the number of the breaking coil permanent magnets 183 is four and uniformly distributed around the circumference of the axis of the breaking coil bobbin 181, and the breaking coil permanent magnets 183 are located outside the breaking coil 182 and embedded into the breaking coil bobbin 181. In order to facilitate the installation of the breaking coil disc, the shell 12 also comprises four upper convex ribs 16 and four lower convex ribs 17, the four upper convex ribs 16 are arranged at the upper ends of the front and rear inner walls of the shell 12, and the four lower convex ribs 17 are arranged at the lower ends of the front and rear inner walls of the shell 12; the breaking coil former 181 is arranged between the upper convex rib 16 and the lower convex rib 17.
In this embodiment, as shown in fig. 7, the repulsive disc 20 includes an annular repulsive disc skeleton 201, a circular metal disc 203 and a cylindrical repulsive disc permanent magnet 202, the metal disc 203 is embedded into the repulsive disc skeleton 201, the left and right end surfaces of the metal disc 203 are respectively flush with the left and right end surfaces of the repulsive disc skeleton 201, the repulsive disc permanent magnets 202 are four and uniformly distributed around the axis circumference of the repulsive disc skeleton 201, and the repulsive disc permanent magnets 202 are located outside the metal disc 203 and are embedded into the repulsive disc skeleton 201.
In this embodiment, the upper end cover 121 of the housing 12 is detachable, and the rear side wall of the housing 12 is provided with a through hole 122 for facilitating the wire end and wire tail of the breaking coil disc 18 to be penetrated out and a through notch 123 for facilitating the wire end and wire tail of the sucking coil disc 15 to be penetrated out, so as to facilitate the connection of the driving circuit.
In this embodiment, the driving circuit adjusts the magnitude of the instantaneous strong pulse current flowing into the suction coil 152, so as to change the closing speed of the contact; the contact breaking speed can be changed by adjusting the magnitude of the instantaneous strong pulse current which is fed into the breaking coil 182 through the driving circuit.
In this embodiment, the power supply of the contact loop where the moving contact 30 and the fixed contact 38 are located is a direct current or alternating current power supply, the load is a resistor or an inductor, and the two ends of the moving contact 30 and the fixed contact 38 are connected with oscilloscope probes, so that the contact voltage and the current waveform can be obtained.
In this embodiment, the materials of the moving contact clamp 27, the moving contact fixing screw 29, the fixed contact clamp 35 and the fixed contact fixing screw 37 are copper or copper alloy or other materials with good electrical conductivity.
In this embodiment, the centers of the opening adjusting bolt 13, the locking nut 14, the attraction coil disc 15, the repulsion disc 20, the breaking coil disc 18, the flange graphite copper sleeve 19, the guide rod 21 with a blind hole, the first spring seat 22, the contact spring 23, the second spring seat 24, the connecting shaft 25, the first insulator 26, the moving contact clamp 27, the moving contact 30, the fixed contact 38, the fixed contact clamp 35, the second insulator 34 and the connecting rod 33 are arranged on the same straight line, namely, are coaxial.
The specific implementation process comprises the following steps: when the attraction coil flows instantaneous strong pulse current, the generated huge eddy current repulsive force enables the repulsive force disc to move in a direction away from the attraction coil disc, and the repulsive force disc drives the guide rod 21, the first spring seat 22, the contact spring 23, the second spring seat 24, the connecting shaft 25, the first insulator 26, the moving contact clamp 27, the first binding post 28, the moving contact fixing screw 29 and the moving contact 30 to move in a direction close to the fixed contact 38 until the moving contact 30 and the fixed contact 38 are in stable contact, at the moment, the left side surfaces of the four repulsive force disc permanent magnets 202 are in one-to-one superposition with the surfaces of the four breaking coil disc permanent magnets 183, so that the moving contact 30 and the fixed contact 38 are kept in stable contact, and the moving contact 30 is prevented from being repelled due to electric repulsive force between the moving contact 30 and the fixed contact 38 and elasticity after the contact spring 23 is compressed; when the breaking coil flows through the instantaneous strong pulse current, the generated huge eddy current repulsive force enables the repulsive force disc 20 to move in a direction away from the breaking coil disc 18, the repulsive force disc 20 drives the guide rod 21, the first spring seat 22, the contact spring 23, the second spring seat 24, the connecting shaft 25, the first insulator 26, the moving contact clamp 27, the first binding post 28, the moving contact fixing screw 29 and the moving contact 30 to move in a direction away from the fixed contact 38 and return to an initial position, and at the moment, the right side surfaces of the four repulsive force disc permanent magnets 202 are overlapped with the surfaces of the four attraction coil disc permanent magnets 153 one by one, so that the moving contact 30 returns to the initial position, and the next closing of the moving contact 30 and the fixed contact 38 is facilitated, and therefore the closing and breaking functions of the contacts can be realized.
The invention has the advantages that: (1) The device adopts the eddy-current repulsive force mechanism to drive the closing and breaking of the moving and static contacts, and the eddy-current repulsive force mechanism has simple structure, small volume, short repulsive force forming and action response time and high acceleration, so that the stepless adjustment of the closing speed and breaking speed of the contacts in a large range is easily realized through a driving circuit, and the defects of the current contact material electrical property simulation test device can be overcome; (2) The device can simulate the action process of various switch electrical appliance contact systems, can adjust the opening distance of a moving contact, realize the clamping of contacts with different specifications, realize the stepless adjustment of the large-scale closing speed and breaking speed of the contacts, is convenient for analyzing the influence of different closing and breaking speeds on the electrical performance of the contact materials, is suitable for the simulation test research of the electrical performance of the contact materials of various switch electrical appliances, can provide conditions for the test and the experiment of the contact materials of various switch electrical appliances, and further provides basis for the selection and design of the contact materials of various switch electrical appliances.
If the invention discloses or relates to components or structures fixedly connected with each other, then unless otherwise stated, the fixed connection is understood as: detachably fixed connection (e.g. using bolts or screws) can also be understood as: the non-detachable fixed connection (e.g. riveting, welding), of course, the mutual fixed connection may also be replaced by an integral structure (e.g. integrally formed using a casting process) (except for obviously being unable to use an integral forming process).
In addition, terms used in any of the above-described aspects of the present disclosure to express positional relationship or shape have meanings including a state or shape similar to, similar to or approaching thereto unless otherwise stated.
Any part provided by the invention can be assembled by a plurality of independent components, or can be manufactured by an integral forming process.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same; while the invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.
Claims (8)
1. A contact material simulation test device based on an eddy-current repulsive force mechanism is characterized in that: the device comprises a base, a contact clamp arranged above the base and an eddy-current repulsive force mechanism arranged at the right end of the base, wherein the contact clamp comprises a fixed contact clamp and a movable contact clamp which are distributed oppositely left and right; the eddy-current repulsive force mechanism comprises a shell, a breaking coil disc, a repulsive force disc and an attraction coil disc are sequentially arranged in the shell from left to right, the middle of the repulsive force disc is connected with a moving contact through a connecting piece, and an opening distance adjusting mechanism for adjusting the distance between the attraction coil disc and the breaking coil disc is connected to the attraction coil disc;
the opening adjusting mechanism comprises an opening adjusting bolt and locking nuts which are in threaded connection with the opening adjusting bolt, the opening adjusting bolt penetrates through the center of the right end face of the shell and is in threaded connection with the middle of the suction coil disc, and the locking nuts are a pair and are respectively arranged on the inner side and the outer side of the right end face of the shell;
The connecting piece comprises a guide rod, a connecting shaft and a first insulator, wherein the guide rod penetrates through the left end face of the shell in a sliding mode, the right end of the guide rod penetrates through the breaking coil disc and is in threaded connection with the middle of the repulsive force disc, and a blind hole is formed in the middle of the left end face of the guide rod; the connecting shaft is arranged between the moving contact clamp and the guide rod, a first insulator is fixedly connected between the left end of the connecting shaft and the moving contact clamp, and the right end of the connecting shaft stretches into the blind hole and is in sliding fit with the blind hole.
2. The contact material simulation test device based on the eddy current repulsion mechanism according to claim 1, wherein: the connecting shaft is in a step shape with a large left end diameter and a small right end diameter, a spring assembly is connected between the shaft shoulder of the connecting shaft and the left end face of the guide rod, the spring assembly comprises a first spring seat, a second spring seat and a contact spring, the first spring seat is fixedly arranged on the left end face of the guide rod, the second spring seat is fixedly arranged on the shaft shoulder of the connecting shaft, and one end of the contact spring is fixedly arranged on the first spring seat, and the other end of the contact spring is fixedly arranged on the second spring seat; the flange graphite copper sleeve is fixedly connected to the center of the left end face of the shell, and the flange graphite copper sleeve is in sliding fit with the connecting shaft.
3. The contact material simulation test device based on the eddy current repulsion mechanism according to claim 1, wherein: the base is provided with a transverse screw rod sliding block mechanism, a screw rod of the transverse screw rod sliding block mechanism is driven to rotate by a hand wheel, the top surface of a sliding block of the transverse screw rod sliding block mechanism is fixedly connected with a heightening block, the top surface of the heightening block is fixedly connected with a support fixing seat, a connecting rod which is transversely arranged is fixed on the support fixing seat, and a second insulator is connected between the right end surface of the connecting rod and a static contact clamp; and the rear end of the sliding block of the transverse screw rod sliding block mechanism is connected with a sliding block locking screw in a threaded manner.
4. The contact material simulation test device based on the eddy current repulsion mechanism according to claim 1, wherein: the left end face of the moving contact clamp is provided with a first mounting hole for mounting the moving contact, the side wall of the first mounting hole is provided with a first clamping notch, and the threads at the upper end and the lower end of the first clamping notch penetrate through moving contact fixing screws for locking the moving contact; a first binding post is arranged on the side surface of the movable contact clamp; the right end face of the static contact clamp is provided with a second mounting hole for mounting the static contact, the side wall of the second mounting hole is provided with a second clamping notch, and the threads at the upper end and the lower end of the second clamping notch penetrate through static contact fixing screws for locking the static contact; and a second binding post is arranged on the side surface of the fixed contact clamp.
5. The contact material simulation test device based on the eddy current repulsion mechanism according to claim 4, wherein: the base is also fixedly connected with a protective cover in a 冂 shape, and the left end of the moving contact clamp and the right end of the fixed contact clamp extend into the protective cover.
6. The contact material simulation test device based on the eddy current repulsion mechanism according to claim 1, wherein: the suction coil disc comprises a circular suction coil disc framework, annular suction coils and suction coil disc permanent magnets, wherein the suction coils are embedded into the suction coil disc framework, the suction coil disc permanent magnets are four and uniformly distributed around the circumference of the axis of the suction coil disc framework, and the suction coil disc permanent magnets are positioned at the outer sides of the suction coils and are embedded into the suction coil disc framework; the breaking coil disc comprises a square breaking coil disc framework, annular breaking coils and breaking coil disc permanent magnets, wherein the breaking coils are embedded into the breaking coil disc framework, the number of the breaking coil disc permanent magnets is four and are uniformly distributed around the circumference of the axis of the breaking coil disc framework, and the breaking coil disc permanent magnets are positioned on the outer side of the breaking coils and are embedded into the breaking coil disc framework; the repulsion tray comprises an annular repulsion tray framework, a circular metal tray and a repulsion tray permanent magnet, wherein the metal tray is embedded into the repulsion tray framework, the left end face and the right end face of the metal tray are respectively flush with the left end face and the right end face of the repulsion tray framework, the number of the repulsion tray permanent magnets is four, the repulsion tray permanent magnets are uniformly distributed around the circumference of the axis of the repulsion tray framework, and the repulsion tray permanent magnets are located on the outer side of the metal tray and embedded into the repulsion tray framework.
7. The contact material simulation test device based on the eddy current repulsion mechanism according to claim 6, wherein: the device also comprises four upper convex ribs and four lower convex ribs, wherein the four upper convex ribs are arranged at the upper ends of the inner walls of the front and rear surfaces of the machine shell, and the four lower convex ribs are arranged at the lower ends of the inner walls of the front and rear surfaces of the machine shell; the breaking coil disc framework is arranged between the upper convex rib and the lower convex rib; the upper end cover of the shell is detachable, and the rear side wall of the shell is provided with a penetrating hole which is used for facilitating the breaking of the wire end and the wire tail of the coil panel and a penetrating notch which is used for facilitating the sucking of the wire end and the wire tail of the coil panel, so that the driving circuit can be conveniently connected.
8. A working method of a contact material simulation test device based on an eddy-current repulsive force mechanism is characterized by comprising the following steps of: a contact material simulation test device based on an eddy current repulsion mechanism according to any one of claims 1 to 7, wherein the device is used for working: when the attraction coil flows instantaneous strong pulse current, the generated huge eddy repulsive force enables the repulsive force disc to move in a direction away from the attraction coil disc, and the repulsive force disc drives the moving contact to move in a direction close to the fixed contact through the connecting piece and the moving contact clamp until the moving contact and the fixed contact are in stable contact, at the moment, the left side surfaces of the four permanent magnets of the repulsive force disc are in one-to-one superposition with the surfaces of the four permanent magnets of the breaking coil disc, so that the moving contact and the fixed contact are kept in stable contact, and the repulsion of the moving contact due to electric repulsive force between the moving contact and the fixed contact and the elastic force after the contact spring is compressed is prevented; when the breaking coil flows through the instantaneous strong pulse current, the generated huge eddy repulsive force enables the repulsive force disc to move in the direction away from the breaking coil disc, the repulsive force disc drives the moving contact to move in the direction away from the fixed contact through the connecting piece and the moving contact clamp and return to the initial position, at the moment, the right side surfaces of the four permanent magnets of the repulsive force disc are overlapped with the surfaces of the four permanent magnets of the suction coil disc one by one, so that the moving contact returns to the initial position, and the next closing of the moving contact and the fixed contact is facilitated, and therefore the closing and breaking functions of the contact can be realized.
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