CN108152690B - Rotating contact arc experimental device - Google Patents
Rotating contact arc experimental device Download PDFInfo
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- CN108152690B CN108152690B CN201711457365.7A CN201711457365A CN108152690B CN 108152690 B CN108152690 B CN 108152690B CN 201711457365 A CN201711457365 A CN 201711457365A CN 108152690 B CN108152690 B CN 108152690B
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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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
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- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Abstract
The invention belongs to an arc experimental device for a rotary contact, and particularly relates to an experimental device for testing the influence of the rotation of a contact on an arc when a switch is switched on and switched off. The small-sized experimental device which is reliable, effective and convenient to operate and can test the influence of the rotation of the contact on the electric arc is provided for the research of the electric arc theory. The arc extinguishing chamber assembly comprises an operating mechanism and an arc extinguishing chamber assembly; the operating mechanism is characterized in that a moving contact in the arc extinguish chamber assembly is operated by the operating mechanism to do linear motion and rotation.
Description
Technical Field
The invention belongs to an arc experimental device for a rotary contact, and particularly relates to an experimental device for testing the influence of the rotation of a contact on an arc when a switch is switched on and switched off.
Background
In recent years, power distribution systems develop rapidly, an ac/dc switch becomes a research hotspot as a key device in power equipment, and an ac/dc contactor is one of indispensable basic elements which are applied to military and national economy (such as space shuttles and electric automobiles) at present. The existing arc experimental device only performs comparison experiments on factors such as arc extinguishing media, gas pressure, breaking speed, magnetic field and the like, and cannot perform experiments on the influence of contact rotation on the arc. The experimental basis for the influence of contact rotation on the arc in action is lacked in the field of arc research. Therefore, it is necessary to design an arc experimental device with simple operation, in which the contact can rotate as required during operation.
Disclosure of Invention
The invention provides a rotary contact arc experimental device aiming at the defects in the prior art, and solves the problem that the existing arc research device in the field of contactor arc research cannot research the influence of contact rotation on an arc.
In order to achieve the purpose, the invention adopts the following technical scheme that the device comprises an operating mechanism and an arc extinguish chamber assembly; the operating mechanism is characterized in that a moving contact in the arc extinguish chamber assembly is operated by the operating mechanism to do linear motion and rotation.
As a preferable aspect of the present invention, the present invention further includes the base; the operating structure and the arc extinguish chamber are both arranged on the base.
As another preferable scheme of the invention, the wire connecting device further comprises wire connecting bars, wherein the wire connecting bars are all rigidly connected with the base through insulating supports; hole sites convenient for connecting the main loop lead and the sensor lead are reserved on the wiring row.
As a preferred scheme of the invention, the operating mechanism comprises a moving contact assembly, a swing arm assembly, a guide seat assembly, a cylinder seat, a linear guide rail seat arranged on a base and a guide seat assembly.
The base is provided with a linear guide rail seat, and a linear guide rail is arranged on the linear guide rail seat and is rigidly connected with the linear guide rail seat; the linear guide rail is sequentially provided with a first guide seat assembly and a second guide seat assembly; the guide seat I assembly and the guide seat II assembly are connected through an over travel spring; the cylinder block is arranged on the base and one side of the linear guide rail seat and is rigidly connected with the linear guide rail seat; the cylinder seat is provided with an operating cylinder; a cylinder shaft of the operating cylinder penetrates through the cylinder seat to apply acting force to the guide seat assembly II; the overtravel spring can only be compressed and can not be stretched.
The guide seat assembly is connected with the swing arm assembly and the moving contact assembly, and the swing arm assembly is supported on the base through a swing arm rotating shaft; the swing arm assembly is connected with the moving contact assembly; the moving contact of the moving contact assembly is connected with the arc extinguish chamber assembly through the linear bearing with the seat.
The operating cylinder applies acting force to the second guide seat assembly, the second guide seat assembly applies acting force to the first guide seat assembly through the overtravel spring, and the second guide seat assembly and the first guide seat assembly both slide on the linear slide rail; the guide seat assembly slides to drive the swing arm assembly and the moving contact assembly to move, so that the moving contact in the arc extinguish chamber assembly can do linear motion and rotary motion.
As another preferred scheme of the invention, the operating mechanism further comprises a displacement sensor arranged on the base and an open distance limiting bolt arranged on the cylinder seat; the spacing bolt penetrates through the cylinder block and is in threaded connection with the cylinder block, one end of the spacing bolt penetrates out of the cylinder block and is parallel to the cylinder shaft, the spacing bolt is adjusted to play a role in limiting the second guide seat assembly, and when the second guide seat assembly slides along the guide rail, the second guide seat assembly touches the spacing bolt and penetrates out of the end of the cylinder block, so that the spacing is forcedly stopped. The spacing bolt penetrates through the cylinder block and is in threaded connection with the cylinder block, and the spacing can be adjusted by adjusting the screwing-in depth of the overtravel limiting bolt; and a displacement sensor shaft of the displacement sensor is connected with a guide seat assembly to measure the moving distance of the guide seat assembly along the guide rail.
As another preferable scheme of the invention, the linear bearing with the seat is connected with the arc extinguish chamber assembly through a flange, an angle indicating laser is arranged on the linear bearing with the seat, the angle indicating laser is rigidly connected with the linear bearing with the seat, and the laser direction is parallel to the axial direction of the movable contact.
As another preferable scheme of the invention, the second guide seat assembly comprises a second guide seat and a sliding block; the second guide seat is fixedly connected with the sliding block; the slide block can slide back and forth on the linear guide rail and is connected with the linear guide rail in a sliding way.
As another preferable scheme of the invention, the guide seat assembly comprises a first guide seat and a sliding block; the sliding block is arranged on the first guide seat and is fixedly connected with the first guide seat; the sliding block can slide back and forth on the linear guide rail and is connected with the linear guide rail in a sliding way; and one side of the guide seat is fixedly connected with a displacement sensor shaft fixing piece for fixing a displacement sensor shaft. And the displacement sensor shaft is rigidly connected with the displacement sensor shaft fixing piece.
As another preferred solution of the present invention, the arc extinguish chamber assembly comprises a front end cover, a supporting column and a rear end cover; the support column is arranged between the front end cover and the rear end cover and is detachably connected with the front end cover and the rear end cover, and the support column integrally forms a shell-shaped structure; the shell-shaped structure is erected on the base through insulating support legs, and the insulating support legs are rigidly connected with the base; one side of the shell-shaped structure is detachably connected with a linear bearing with a seat, a fixed contact and a moving contact are arranged in the shell-shaped structure in an opposite mode, one end of the fixed contact extends out of the front end cover, and one end of the moving contact sequentially extends out of the rear end cover and the linear bearing with the seat through the support of the linear bearing with the seat; the contact end parts of the moving contact and the fixed contact are both provided with replaceable contacts, and the replaceable contacts are connected with the moving contact or the fixed contact connected with the replaceable contacts through threads.
As another preferred scheme of the present invention, the movable contact assembly includes a ball rod and an angle dial; one end of the moving contact penetrating through the linear bearing with the seat penetrates through the angle dial, one end of the moving contact penetrating through the angle dial is provided with a square groove, and a connecting pin penetrates through the square groove; two ball head rods are arranged on the movable contact head along the length direction between the angle dial and the square groove, a space is reserved between the two ball head rods, a first mounting position is reserved between the ball heads at the upper ends of the two ball head rods, and a second mounting position is reserved between the two ball heads at the lower ends of the two ball head rods.
As another preferred scheme of the invention, the swing arm assembly comprises an input swing arm, an output swing arm I, an output swing arm II and a swing arm shaft sleeve; the input swing arm and the output swing arm are connected through a swing arm rotating shaft, one end of the input swing arm is penetrated through by the swing arm rotating shaft, and the other end of the input swing arm is provided with a strip-shaped hole; the swing arm assembly can rotate around a swing arm rotating shaft.
As another preferred scheme of the invention, when the moving contact is required to rotate positively, one end ball of a double-ball-head connecting rod is hinged with a first mounting position of the moving contact assembly through a connecting pin, and the other end ball is rigidly connected with an output swing arm of a swing arm assembly; when the moving contact needs to rotate reversely, one end ball head of the double-ball-head connecting rod is hinged with the two mounting positions of the moving contact assembly through the connecting pin, and the other end ball head of the double-ball-head connecting rod is rigidly connected with the two output swing arms of the swing arm assembly.
One end ball head of the double-ball-head connecting rod II is rigidly connected with the guide seat II assembly, and the other end ball head is rigidly connected with the input swing arm through a strip-shaped hole on the input swing arm through a screw; the rotating angle of the moving contact can be adjusted by adjusting the position of the moving contact in the strip-shaped hole of the input swing arm.
A ball head at one end of the double-ball-head connecting rod is hinged with the moving contact assembly through a connecting pin, and a ball head at the other end of the double-ball-head connecting rod is fixedly connected with the first guide seat; and the length of the double-ball-head connecting rod is adjustable.
As another preferred scheme of the invention, during closing, the operating cylinder pushes outwards to drive the guide seat II assembly, the over travel spring, the guide seat I assembly, the displacement sensor shaft, the double-ball-head connecting rod III and the moving contact assembly to move linearly; meanwhile, the guide seat assembly drives the swing arm assembly to rotate around a swing arm rotating shaft through the double-ball-head connecting rod II, and the swing arm assembly drives the moving contact assembly to rotate around the moving contact axis through the double-ball-head connecting rod I; when the two replaceable contacts are contacted, the moving contact stops moving, the operating cylinder drives the two guide seat assemblies to continue moving, and the overtravel spring is compressed to enable the two replaceable contacts to be tightly attached.
During opening, the operating cylinder drives the second guide seat assembly to move, the over travel spring extends to the longest point and then drives the first guide seat assembly, the displacement sensor shaft, the double-ball-head connecting rod III and the moving contact assembly to move linearly, and the two replaceable contacts are separated; meanwhile, the guide seat assembly drives the swing arm assembly to rotate around the swing arm shaft through the double-ball-head connecting rod II, the swing arm assembly drives the moving contact assembly to rotate around the axis of the moving contact through the double-ball-head connecting rod I, and after the guide seat assembly and the spacing limiting bolt are contacted, all parts stop moving, and the over travel size can be adjusted by adjusting the length of the double-ball-head connecting rod III.
Compared with the prior art, the invention has the beneficial effects.
The rotating contact arc experimental device realizes that the contact rotation angle is adjustable, the contact is replaceable, the switching-on and switching-off speed is adjustable, the arc shape and experimental data are easy to detect in the experimental process, and provides a reliable, effective and convenient-to-operate miniaturized experimental device for checking the calculation result and analysis in the arc theory research process and designing and researching the bridge type direct current contactor. The device can meet various test conditions required by the arc test of the rotary contact, and has high test efficiency, accurate result and detection.
Drawings
The invention is further described with reference to the following figures and detailed description. The scope of the invention is not limited to the following expressions.
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic structural diagram of the operating mechanism of the present invention.
Fig. 3 is a schematic structural diagram of the movable contact assembly of the present invention.
Fig. 4 is a schematic structural view of the swing arm assembly of the present invention.
FIG. 5 is a schematic view of an assembly of the guide base of the present invention.
FIG. 6 is a schematic view of the structure of the guide seat assembly according to the present invention.
Figure 7 is a schematic view of the arc chute assembly of the present invention.
In the figure, 1 is an arc experimental device, 2 is an insulating support, 3 is a wiring bar, 4 is an arc extinguish chamber assembly, 5 is an operating mechanism, 6 is a base, 7 is a moving contact assembly, 8 is a linear bearing, 9 is a linear bearing seat, 10 is an angle indication laser, 11 is a double-ball-head connecting rod I, 12 is a swing arm assembly, 13 is a swing arm rotating shaft, 14 is a double-ball-head connecting rod II, 15 is an overtravel spring, 16 is a guide seat II assembly, 17 is a cylinder shaft, 18 is an operating cylinder, 19 is an open distance limit bolt, 20 is a cylinder seat, 21 is a displacement sensor, 22 is a linear guide rail seat, 23 is a linear guide rail, 24 is a displacement sensor shaft, 25 is a guide seat I assembly, 26 is a double-ball-head connecting rod III, 27 is a moving contact, 28 is a mounting position I, 29 is a connecting pin, 31 is a mounting position II, 32 is a ball-head rod, 33 is an angle dial, 34 is an output swing arm II, 35 is an, 36 is a swing arm shaft sleeve, 37 is a strip-shaped hole, 38 is an input swing arm, 39 is a displacement sensor shaft fixing piece, 40 is a guide seat I, 41 is a sliding block, 42 is a guide seat II, 43 is an insulating support leg, 44 is a fixed contact, 46 is a front end cover, 47 is a support column, 48 is a replaceable contact, and 49 is a rear end cover.
Detailed Description
As shown in fig. 1-7, the present invention includes an operating mechanism 5 and an arc extinguishing chamber assembly 4; the operating mechanism 5 operates the moving contact in the arc extinguish chamber assembly 4 to do linear motion and rotation. The movable contact assembly 7 can move linearly and rotate along the axial direction of the movable contact 27.
Preferably, the base 6 is also included; the operating structure and the arc extinguish chamber assembly 4 are arranged on the base 6.
Preferably, the wire connecting bar comprises wire connecting bars 3, wherein the wire connecting bars 3 are rigidly connected with a base 6 through insulating supports 2; hole sites convenient for connecting the main loop lead and the sensor lead are reserved on the wiring row 3.
Preferably, the operating mechanism 5 includes a movable contact assembly 7, a swing arm assembly 12, a guide seat assembly 16, a cylinder block 20, a linear guide rail seat 22 and a guide seat assembly 25, which are disposed on the base 6.
A linear guide rail seat 22 is arranged on the base 6, and a linear guide rail 23 is arranged on the linear guide rail seat 22 and is rigidly connected with the linear guide rail seat 23; the linear guide rail 22 is sequentially provided with a guide seat assembly 25 and a guide seat assembly 16; the two are connected with a linear guide rail 23 in a sliding way, and a first guide seat assembly 25 is connected with a second guide seat assembly 16 through an overtravel spring 15; one end of the over travel spring 15 is connected with the guide seat assembly 25, and the other end of the over travel spring 15 is connected with the guide seat assembly 16; the cylinder seat 20 is arranged on the base and at one side of the linear guide rail seat 22 and is rigidly connected with the linear guide rail seat 22; the cylinder block 20 is provided with an operating cylinder 18; a cylinder shaft 17 of an operating cylinder 18 penetrates through a cylinder seat 20 to apply acting force to the guide seat assembly 16; (and the over travel spring 15 can only be compressed and not stretched).
The guide seat assembly 25 is connected with the swing arm assembly 12 and the moving contact assembly 7, and the swing arm assembly 12 is supported on the base 6 through a swing arm rotating shaft 13; the swing arm assembly 12 is connected with the moving contact assembly 7; the moving contact 27 of the moving contact assembly 7 is connected with the arc extinguish chamber assembly 4 through a linear bearing with a seat; the linear bearing with the bearing seat comprises a linear bearing seat 9 and a linear bearing 8 positioned on the linear bearing seat 9.
The operating cylinder 18 applies acting force to the second guide seat assembly 16, the second guide seat assembly 16 applies acting force to the first guide seat assembly 25 through the overtravel spring 15, and the second guide seat assembly 16 and the first guide seat assembly 25 both slide on the linear slide rail 23; the guide seat assembly 25 slides to drive the swing arm assembly 12 and the moving contact assembly 7 to move, so that the moving contact 27 in the arc extinguish chamber assembly 4 can do linear motion and rotary motion.
Preferably, the operating mechanism 5 further includes a displacement sensor 21 (electronic ruler) disposed on the base 6, and an open distance limit bolt 19 disposed on the cylinder block 20; the clearance limiting bolt 19 penetrates through the cylinder seat 20 and is in threaded connection with the cylinder seat 20, one end of the clearance limiting bolt 19 penetrates through the cylinder seat 20 and is parallel to the cylinder shaft 17, the clearance limiting bolt 19 is adjusted to play a limiting role on the guide seat assembly 16, and when the guide seat assembly 16 slides along the guide rail, the clearance limiting bolt 19 is collided and penetrates out of the end of the cylinder seat 20, and then the end is forced to stop limiting. (the opening distance limiting bolt 19 penetrates through the cylinder seat and is in threaded connection with the cylinder seat 20, and the opening distance can be adjusted by adjusting the screwing depth of the opening distance limiting bolt 19; the displacement sensor shaft 24 of the displacement sensor 21 is connected with a first guide seat assembly 25, and the moving distance of the first guide seat 40 along the guide rail is measured.
Preferably, the linear bearing with a seat is connected with the arc extinguishing chamber assembly 4 through a flange, an angle indicating laser 10 is arranged on the linear bearing with a seat, the angle indicating laser 10 is rigidly connected with the linear bearing with a seat, and the laser direction is parallel to the axial direction of the movable contact 27.
Preferably, the second guide seat assembly 16 comprises a second guide seat 42 and a sliding block 41; the second guide seat 42 is fixedly connected with the sliding block 41; the slide block 41 can slide back and forth on the linear guide rail 23 and is connected with the linear guide rail 23 in a sliding manner.
Preferably, the first guide seat assembly 25 comprises a first guide seat 40 and a sliding block 41; the sliding block is arranged on the first guide seat 40 and is fixedly connected with the guide seat; the slide block 41 can slide back and forth on the linear guide rail 23 and is connected with the linear guide rail 23 in a sliding manner; and one side of the first guide seat 40 is fixedly connected with a displacement sensor shaft fixing piece 39 for fixing the displacement sensor shaft 24.
Preferably, the arc chute assembly 4 comprises a front end cover 46, a support column 47 and a rear end cover 49; the support column 47 is arranged between the front end cover 46 and the rear end cover 49 and detachably connected with the front end cover and the rear end cover, and integrally forms a shell-shaped structure; the shell-shaped structure is externally erected on the base through an insulating support leg 43, and the insulating support leg 43 is rigidly connected with the base 6; one side of the shell-shaped structure is detachably connected with a linear bearing with a seat, a fixed contact 44 and a movable contact 27 are arranged in the shell-shaped structure in an opposite mode, one end of the fixed contact 44 extends out of the front end cover 46, and one end of the movable contact 27 is supported by the linear bearing with the seat and sequentially extends out of the rear end cover and the linear bearing with the seat; the contact ends of the movable contact 27 and the fixed contact 44 are provided with replaceable contacts 48, and the replaceable contacts 48 are connected with the movable contact 27 or the fixed contact 44 connected with the replaceable contacts 48 through threads. (the movable contact 27 can move linearly along its axis and rotate around its axis).
Preferably, the movable contact assembly 7 includes a ball head rod 32 and an angle dial 33; one end of the moving contact 27 penetrating through the linear bearing with the seat penetrates through the angle dial 33, (the moving contact rotates, the angle dial does not move), one end of the moving contact 27 penetrating through the angle dial 33 is provided with a square groove, and a connecting pin 29 penetrates through the square groove; two ball heads 32 are arranged on the moving contact 27 along the length direction between the angle dial 33 and the square groove, a space is reserved between the two ball heads 32, a first mounting position 28 is reserved between the ball heads at the upper ends of the two ball heads 32, and a second mounting position 31 is reserved between the two ball heads at the lower ends of the two ball heads.
Preferably, the swing arm assembly 12 comprises an input swing arm 38, a first output swing arm 35, a second output swing arm 34 and a swing arm bushing 36; the input swing arm and the output swing arm are connected through a swing arm rotating shaft 13, one end of the input swing arm 38 is penetrated through the swing arm rotating shaft, a swing arm shaft sleeve 36 is arranged between the input swing arm 38 and the output swing arm, and the swing arm shaft sleeve 36 is sleeved on the swing arm rotating shaft 13. The other end of the input swing arm 38 is provided with a strip-shaped hole 37; the swing arm assembly 12 can rotate around a swing arm rotating shaft 13.
Preferably, when the moving contact 27 needs to rotate forwards, one end ball of the double-ball-head connecting rod I11 is hinged with the first mounting position 28 of the moving contact assembly through the connecting pin 29, and the other end ball is rigidly connected with the first output swing arm 35 of the swing arm assembly; when the moving contact 27 needs to rotate reversely, one end ball of the double-ball-head connecting rod I11 is hinged with the second mounting position 31 of the moving contact assembly through the connecting pin 29, and the other end ball is rigidly connected with the second output swing arm 34 of the swing arm assembly.
One end ball head of the double-ball-head connecting rod II 14 is rigidly connected with the guide seat II assembly 16, and the other end ball head is rigidly connected with the input swing arm 38 through a strip-shaped hole 37 on the input swing arm 38 through a screw; the rotating angle of the movable contact 27 can be adjusted by adjusting the position of the movable contact in the strip-shaped hole 37 of the input swing arm.
One end ball of a double-ball connecting rod III 26 is hinged with the moving contact assembly 7 through a connecting pin 29, and the other end ball is fixedly connected with a guide seat I40; and the length of the double-ball-head connecting rod III 26 is adjustable.
Preferably, during closing, the operating cylinder 18 pushes outwards to drive the second guide seat assembly 16, the over travel spring 15, the first guide seat assembly 25, the displacement sensor shaft 24, the third double-ball-head connecting rod 26 and the moving contact assembly 7 to move linearly; meanwhile, the guide seat I assembly 25 drives the swing arm assembly 12 to rotate around the swing arm rotating shaft 13 through the double-ball-head connecting rod II 14, and the swing arm assembly 12 drives the moving contact assembly 7 to rotate around the axis of the moving contact 27 through the double-ball-head connecting rod I11; when the two replaceable contacts 48 are contacted, the movable contact 27 stops moving, the operating cylinder 19 drives the two guide seat assemblies 16 to continue moving, and the over-travel spring 15 is compressed to make the two replaceable contacts 48 tightly attached.
During opening, the operating cylinder 18 drives the second guide seat assembly 16 to move, the over travel spring 15 extends to the longest point and then drives the second guide seat assembly 25, the displacement sensor shaft 24, the third double-ball-head connecting rod 26 and the movable contact assembly 7 to move linearly, and the two replaceable contacts 48 are separated; meanwhile, the first guide seat assembly 25 drives the swing arm assembly 12 to rotate around the swing arm shaft 13 through the second double-ball-head connecting rod 14, the swing arm assembly 12 drives the moving contact assembly 7 to rotate around the axis of the moving contact 27 through the first double-ball-head connecting rod 11, and after the second guide seat assembly 16 is contacted with the spacing bolt 19, all parts stop moving, and the length of the third double-ball-head connecting rod 26 is adjusted, so that the overtravel can be adjusted.
It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the invention.
Claims (8)
1. The rotating contact arc experimental device comprises an operating mechanism and an arc extinguish chamber assembly; the operating mechanism is characterized in that a moving contact in an arc extinguish chamber assembly is operated by the operating mechanism to do linear motion and rotation;
the device also comprises a base; the operating structure and the arc extinguish chamber assembly are arranged on the base;
the wiring board is rigidly connected with the base through an insulating support; hole sites convenient for connecting the main loop lead and the sensor lead are reserved on the wiring row;
the operating mechanism comprises a moving contact assembly, a swing arm assembly, a guide seat assembly II, a cylinder seat, a linear guide rail seat arranged on the base and a guide seat assembly I;
the base is provided with a linear guide rail seat, and a linear guide rail is arranged on the linear guide rail seat and is rigidly connected with the linear guide rail seat; the linear guide rail is sequentially provided with a first guide seat assembly and a second guide seat assembly; the guide seat I assembly and the guide seat II assembly are connected through an over travel spring; the cylinder block is arranged on the base and one side of the linear guide rail seat and is rigidly connected with the linear guide rail seat; the cylinder seat is provided with an operating cylinder; a cylinder shaft of the operating cylinder penetrates through the cylinder seat to apply acting force to the guide seat assembly II;
the guide seat assembly is connected with the swing arm assembly and the moving contact assembly, and the swing arm assembly is supported on the base through a swing arm rotating shaft; the swing arm assembly is connected with the moving contact assembly; the moving contact of the moving contact assembly is connected with the arc extinguish chamber assembly through the linear bearing with the seat;
the operating cylinder applies acting force to the second guide seat assembly, the second guide seat assembly applies acting force to the first guide seat assembly through the overtravel spring, and the second guide seat assembly and the first guide seat assembly both slide on the linear slide rail; the guide seat assembly slides to drive the swing arm assembly and the moving contact assembly to move, so that the moving contact in the arc extinguish chamber assembly can do linear motion and rotary motion.
2. The rotary contact arc experimental apparatus according to claim 1, wherein: the operating mechanism also comprises a displacement sensor arranged on the base and an open distance limiting bolt arranged on the cylinder seat; the clearance limiting bolt penetrates through the cylinder seat and is in threaded connection with the cylinder seat, one end of the clearance limiting bolt penetrates through the cylinder seat and is parallel to the cylinder shaft, the clearance limiting bolt is adjusted to play a role in limiting the second guide seat assembly, and when the second guide seat assembly slides along the guide rail, the second guide seat assembly is forced to stop limiting when touching the end of the clearance limiting bolt, which penetrates out of the cylinder seat; the spacing bolt penetrates through the cylinder seat and is in threaded connection with the cylinder seat, and the spacing can be adjusted by adjusting the screwing-in depth of the spacing bolt; and a displacement sensor shaft of the displacement sensor is connected with a guide seat assembly to measure the moving distance of the guide seat assembly along the guide rail.
3. The rotary contact arc experimental apparatus according to claim 1, wherein: the second guide seat assembly comprises a second guide seat and a sliding block; the second guide seat is fixedly connected with the sliding block; the slide block can slide back and forth on the linear guide rail and is connected with the linear guide rail in a sliding way.
4. The rotary contact arc experimental apparatus of claim 3, wherein: the guide seat assembly comprises a first guide seat and a sliding block; the sliding block is arranged on the first guide seat and is fixedly connected with the first guide seat; the sliding block can slide back and forth on the linear guide rail and is connected with the linear guide rail in a sliding way; one side of the guide seat is fixedly connected with a displacement sensor shaft fixing piece for fixing a displacement sensor shaft;
and the displacement sensor shaft is rigidly connected with the displacement sensor shaft fixing piece.
5. The rotary contact arc experimental apparatus according to claim 1, wherein: the arc extinguish chamber assembly comprises a front end cover, a support column and a rear end cover; the support column is arranged between the front end cover and the rear end cover and is detachably connected with the front end cover and the rear end cover, and the support column integrally forms a shell-shaped structure; the shell-shaped structure is erected on the base through insulating support legs, and the insulating support legs are rigidly connected with the base; one side of the shell-shaped structure is detachably connected with a linear bearing with a seat, a fixed contact and a moving contact are arranged in the shell-shaped structure in an opposite mode, one end of the fixed contact extends out of the front end cover, and one end of the moving contact sequentially extends out of the rear end cover and the linear bearing with the seat through the support of the linear bearing with the seat; the contact end parts of the moving contact and the fixed contact are both provided with replaceable contacts, and the replaceable contacts are connected with the moving contact or the fixed contact connected with the replaceable contacts through threads; the linear bearing with the seat is connected with the arc extinguish chamber assembly through a flange, angle indicating laser is arranged on the linear bearing with the seat, the angle indicating laser is rigidly connected with the linear bearing with the seat, and the laser direction of the angle indicating laser is parallel to the axial direction of the movable contact.
6. The rotary contact arc experimental apparatus according to claim 1, wherein: the moving contact assembly comprises a ball head rod and an angle dial; one end of the moving contact penetrating through the linear bearing with the seat penetrates through the angle dial, one end of the moving contact penetrating through the angle dial is provided with a square groove, and a connecting pin penetrates through the square groove; two ball head rods are arranged on the movable contact head along the length direction between the angle dial and the square groove, a space is reserved between the two ball head rods, a first mounting position is reserved between the ball heads at the upper ends of the two ball head rods, and a second mounting position is reserved between the two ball heads at the lower ends of the two ball head rods.
7. The rotary contact arc experimental apparatus according to claim 1, wherein: the swing arm assembly comprises an input swing arm, an output swing arm I, an output swing arm II and a swing arm shaft sleeve; the input swing arm and the output swing arm are connected through a swing arm rotating shaft, one end of the input swing arm is penetrated through by the swing arm rotating shaft, and the other end of the input swing arm is provided with a strip-shaped hole; the swing arm assembly can rotate around a swing arm rotating shaft.
8. The rotary contact arc experimental apparatus according to claim 4, wherein: when the moving contact needs to rotate forwards, one end ball head of a double-ball-head connecting rod is hinged with a first mounting position of the moving contact assembly through a connecting pin, and the other end ball head of the double-ball-head connecting rod is rigidly connected with a first output swing arm of a swing arm assembly; when the moving contact needs to be reversely rotated, one end ball head of the double-ball-head connecting rod is hinged with the second mounting position of the moving contact assembly through the connecting pin, and the other end ball head of the double-ball-head connecting rod is rigidly connected with the second output swing arm of the swing arm assembly;
one end ball head of the double-ball-head connecting rod II is rigidly connected with the guide seat II assembly, and the other end ball head is rigidly connected with the input swing arm through a strip-shaped hole on the input swing arm through a screw; the rotating angle of the moving contact can be adjusted by adjusting the position of the moving contact in the strip-shaped hole of the input swing arm;
the ball head at the third end of the double-ball-head connecting rod is hinged with the moving contact assembly through a connecting pin, and the ball head at the other end of the double-ball-head connecting rod is fixedly connected with the first guide seat; the length of the double-ball-head connecting rod III is adjustable;
during closing, the operating cylinder pushes outwards to drive the guide seat II assembly, the over travel spring, the guide seat I assembly, the displacement sensor shaft, the double-ball-head connecting rod III and the moving contact assembly to move linearly; meanwhile, the guide seat assembly drives the swing arm assembly to rotate around a swing arm rotating shaft through the double-ball-head connecting rod II, and the swing arm assembly drives the moving contact assembly to rotate around the moving contact axis through the double-ball-head connecting rod I; when the two replaceable contacts are contacted, the moving contact stops moving, the operating cylinder drives the two guide seat assemblies to continue moving, and the overtravel spring is compressed to enable the two replaceable contacts to be tightly attached;
during opening, the operating cylinder drives the second guide seat assembly to move, the over travel spring extends to the longest point and then drives the first guide seat assembly, the displacement sensor shaft, the double-ball-head connecting rod III and the moving contact assembly to move linearly, and the two replaceable contacts are separated; meanwhile, the guide seat assembly drives the swing arm assembly to rotate around the swing arm shaft through the double-ball-head connecting rod II, the swing arm assembly drives the moving contact assembly to rotate around the axis of the moving contact through the double-ball-head connecting rod I, and after the guide seat assembly and the spacing limiting bolt are contacted, all parts stop moving, and the over travel size can be adjusted by adjusting the length of the double-ball-head connecting rod III.
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| CN201711457365.7A CN108152690B (en) | 2017-12-28 | 2017-12-28 | Rotating contact arc experimental device |
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| CN108152690B true CN108152690B (en) | 2020-02-18 |
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