CN109799018B - Friction force measurement test device for arc extinguish chamber of circuit breaker - Google Patents
Friction force measurement test device for arc extinguish chamber of circuit breaker Download PDFInfo
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- CN109799018B CN109799018B CN201811565507.6A CN201811565507A CN109799018B CN 109799018 B CN109799018 B CN 109799018B CN 201811565507 A CN201811565507 A CN 201811565507A CN 109799018 B CN109799018 B CN 109799018B
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- 238000005259 measurement Methods 0.000 title claims abstract description 29
- 238000012360 testing method Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000004880 explosion Methods 0.000 claims abstract description 14
- 230000003068 static effect Effects 0.000 claims abstract description 11
- 230000007246 mechanism Effects 0.000 claims description 24
- 230000005540 biological transmission Effects 0.000 claims description 17
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 239000000725 suspension Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 238000000418 atomic force spectrum Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to a friction force measurement test device for a circuit breaker arc extinguish chamber. The friction force measurement test device for the arc extinguish chamber of the circuit breaker comprises a supporting table, wherein a movable end supporting frame for supporting the movable end of the arc extinguish chamber and a static end supporting frame for supporting the static end of the arc extinguish chamber are arranged on the supporting table; and a driving device for applying force to the driving end to drive the swing rod to swing is arranged on the supporting table, and a pressure sensor for measuring the friction force of the arc extinguish chamber is arranged between the driving device and the driving end of the swing rod. Above-mentioned technical scheme can be used for simulating the divide-shut brake process of circuit breaker, has solved the great technical problem of measurement result and the actual deviation of current explosion chamber frictional force measurement test device.
Description
Technical Field
The invention belongs to the technical field of high-voltage equipment, and particularly relates to a friction force measurement test device for a circuit breaker arc extinguish chamber.
Background
Under the background of the intense development of ultrahigh voltage in China, the field of high-voltage power transmission and distribution is rapidly developed, and particularly, a circuit breaker serving as one of cores for transmitting electric energy is developed. Because the current ultrahigh voltage circuit breaker has large operation power, and the design of the circuit breaker must be combined with related disciplines of mechanical dynamics, high voltage insulation and magnetohydrodynamics, the performance of the circuit breaker is required to reach the balance of electric appliances, breaking and mechanical service life, and the circuit breaker has high requirements on the assembly process of each part in the circuit breaker. At present, most manufacturers respectively assemble an arc extinguish chamber and an operating mechanism, then carry out general assembly and mechanical adjustment to enable a circuit breaker to meet corresponding mechanical characteristics, when the assembly is abnormal, the friction force of the arc extinguish chamber is overlarge, even if the measured mechanical characteristics meet the requirements, the circuit breaker still can cause fatigue and even damage of part of aluminum parts under long-term operation, and serious safety accidents are possibly caused. Therefore, an accurate measurement of the friction of the arc chute is of great significance for the assembly of the circuit breaker.
There is the device that measures to the frictional force of the explosion chamber of circuit breaker among the prior art, as the chinese utility model patent that the publication number is CN204903064U discloses a circuit breaker arc extinguishing unit frictional force measuring device, this measuring device includes motor, lead screw, adorns screw nut and the dynamometer on the lead screw soon, and dynamometer one end links to each other with the action bars of arc extinguishing unit, and the other end is fixed on screw nut. Through the cooperation with the lead screw and lead screw nut, under the drive of motor, the action bars can pull out the dynamometer at the uniform velocity, can accurately survey the size of frictional force through the dynamometer. However, the rear end of the pull rod of the existing arc extinguish chamber is usually hinged with an operating mechanism comprising a connecting rod, and the driving rod of the arc extinguish chamber is driven to move through the hinged relation between the operating mechanism and the pull rod of the arc extinguish chamber, so that the opening and closing of the circuit breaker are realized; the above patent documents drive the operating rod of the arc extinguishing unit through the screw nut mechanism, and the switching-on and switching-off process of the circuit breaker simulated by the direct-acting type measuring device is different from the switching-on and switching-off process of an actual circuit breaker product to a certain extent, so that the measured friction force of the arc extinguishing chamber has a larger deviation from the friction force of the arc extinguishing chamber in the actual circuit breaker product.
Disclosure of Invention
The invention aims to provide a friction force measurement test device for an arc extinguish chamber of a circuit breaker, and the friction force measurement test device is used for solving the technical problem that the measurement result of the existing arc extinguish chamber friction force measurement test device has larger deviation with the actual measurement result.
In order to achieve the purpose, the technical scheme of the friction force measurement test device for the arc extinguish chamber of the circuit breaker provided by the invention is as follows:
the friction force measurement test device for the arc extinguish chamber of the circuit breaker comprises a supporting table, wherein a movable end supporting frame for supporting the movable end of the arc extinguish chamber and a static end supporting frame for supporting the static end of the arc extinguish chamber are arranged on the supporting table; the supporting table is provided with a driving device for applying force to the driving end to drive the swing rod to swing, and a pressure sensor for measuring friction force is arranged between the driving device and the driving end of the swing rod.
The friction force measurement test device for the arc extinguish chamber of the circuit breaker has the advantages that: the measurement test device drives the swing of the swing rod through the driving device to drive the transmission connecting rod of the arc extinguish chamber to move, the driving process of the connecting rod type operating mechanism in the arc extinguish chamber in an actual circuit breaker product is simulated through the swing process of the swing rod, and the friction force of the arc extinguish chamber is measured through the pressure sensor arranged between the driving device and the swing rod. The whole simulation process is close to the driving process of the operating mechanism in the actual circuit breaker product, so that the measurement test device can improve the measurement accuracy and reduce the deviation between the measurement result and the actual circuit breaker product.
Furthermore, a sliding block is assembled on the supporting table in a guiding sliding mode, a hinge long hole is formed in the sliding block, the driving end of the swing rod is hinged to the sliding block through the hinge long hole, and the pressure sensor is arranged between the sliding block and the driving device.
Has the advantages that: the swing rod is hinged with the sliding block through the hinged long hole, the structure is simple, the assembly is convenient, the sliding block can be moved along the guide of the supporting table and can be transmitted to move of the arc extinguish chamber through the swing rod, the friction force of the arc extinguish chamber is converted into the resistance force applied to the sliding block, the pressure sensor is arranged between the sliding block and the driving device, the dynamic friction force applied to the sliding block in the moving process can be measured, and then the friction force of the arc extinguish chamber is measured.
Further, the driving device comprises a driving motor and a lead screw and nut mechanism driven by the driving motor, and the pressure sensor is pressed between a nut of the lead screw and nut mechanism and the sliding block.
Has the advantages that: the screw nut mechanism is simple in structure and convenient to arrange, and can convert rotary motion into linear motion; the pressure sensor is pressed between the nut and the sliding block, so that the resistance of the sliding block in the sliding process can be measured in real time, and the friction force of the arc extinguish chamber can be obtained in real time.
Furthermore, the driving device is arranged below the supporting table, and the driving motor is arranged at one end, close to the arc extinguish chamber, of the lead screw.
Has the advantages that: the driving motor is arranged at one end, close to the arc extinguish chamber, of the lead screw, the length of the lead screw can be reduced, and accordingly the mounting space of the driving device is saved correspondingly.
Furthermore, the movable end support frame comprises a supporting vertical plate and reinforcing plates arranged on two sides of the supporting vertical plate.
Has the advantages that: the reinforcing plate can be used for increasing the support intensity of supporting the riser, and then improves the support intensity of whole movable end support frame.
Furthermore, the static end support frame comprises the supporting vertical plate and the reinforcing plates arranged on two sides of the supporting vertical plate.
Has the advantages that: the static end support frame and the dynamic end support frame have the same structure, and the consistency of the support strength of the static end and the dynamic end can be ensured.
Furthermore, the swing axis of the swing rod extends along the horizontal direction, the connecting rod hinged end of the swing rod is arranged above the supporting platform, and the driving end of the swing rod is arranged below the supporting platform.
Has the advantages that: the swing axis of the swing rod extends horizontally, and the two ends of the swing rod are respectively positioned at the upper side and the lower side of the supporting platform instead of being positioned at the same side of the supporting platform, so that the installation space of the swing rod is greatly saved.
Drawings
Fig. 1 is a schematic structural diagram of a friction force measurement testing device for an arc extinguish chamber of a circuit breaker, which is provided by the invention;
fig. 2 is a use state diagram of the friction force measurement test device for the arc extinguish chamber of the circuit breaker.
Description of reference numerals: 1-supporting vertical plates, 2-moving end supporting frames, 3-static end supporting frames, 4-supporting tables, 5-servo motors, 6-screw rod nut mechanisms, 7-pressure sensors, 8-sliding blocks, 9-supporting seats, 10-oscillating bars, 11-reinforcing plates, 12-hinged long holes, 13-transmission connecting rods, 14-moving contact seats, 15-moving contact fingers, 16-arc extinguish chamber static ends and 17-suspension plates.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
The invention provides a specific embodiment of a friction force measurement test device for a circuit breaker arc extinguish chamber, which comprises the following steps:
as shown in figure 1, this frictional force measurement test device for circuit breaker explosion chamber is applicable to the non-direct-acting explosion chamber, including brace table 4 and the drive arrangement of setting in brace table 4 below, the brace table 4 is gone up and is immediately equipped with supporting seat 9, still immediately is equipped with and is used for supporting moving end support frame 2 that the explosion chamber moved the end and is used for supporting the quiet end support frame 3 that the explosion chamber held. Move end support frame 2 and quiet end support frame 3 and all include support riser 1 and set up at the reinforcing plate 11 that supports 1 both sides of riser, and reinforcing plate 11 is used for improving the support intensity that supports riser 1.
The supporting seat 9 is hinged with a swing rod 10 capable of swinging through a hinged shaft arranged on the supporting seat, the swing rod 10 has a certain length, the swing axis of the swing rod extends along the horizontal direction, and one end of the swing rod, which is positioned above the supporting table 4, is hinged with a transmission connecting rod of the arc extinguish chamber to form a connecting rod hinged end; the end of the pendulum rod 10 below the support table 4 forms the drive end. Specifically, drive arrangement includes servo motor 5 and the lead screw nut mechanism 6 of being connected with servo motor 5's output, and the below of brace table 4 is equipped with suspension board 17, and servo motor 5 installs the one end that is close to moving end support frame 2 at suspension board 17, still is equipped with the holding tank that is used for holding the lead screw on the suspension board 17. The suspension plate 17 is further provided with a slide rail (not shown) extending along the swinging direction of the swing link 10, and the slide rail is provided with a slide block 8 in a guiding and moving way.
The slide block 8 is provided with a hinge long hole 12, and the driving end of the swing rod 10 is hinged with the slide block 8 through the hinge long hole 12. The slide block 8 is in transmission connection with the lead screw nut mechanism 6, namely the servo motor 5 is started to drive the lead screw nut mechanism 6 to move, and then the slide block 8 is pushed to move along the slide rail in a guiding mode. A pressure sensor 7 is arranged between the sliding block 8 and the nut of the lead screw nut mechanism 6, the pressure sensor 7 is pressed between the nut and the sliding block 8, and when the sliding block 8 moves on the sliding rail, the pressure sensor 7 can measure the resistance force applied to the sliding block 8. Because the drive end of the oscillating bar 10 is hinged with the sliding block 8, when the sliding block 8 moves, the oscillating bar 10 can be driven to swing, so that when the arc extinguish chamber is placed on the support table 4, the hinged end of the connecting rod of the oscillating bar 10 can drive the transmission connecting rod of the arc extinguish chamber to move to complete the switching-off and switching-on processes of the circuit breaker, namely, the linear motion of the screw nut is transferred to the motion of the arc extinguish chamber. Therefore, the resistance force applied to the slider 8 is the friction force of the arc-extinguishing chamber.
When the friction force measurement test device for the arc extinguish chamber of the circuit breaker is used, as shown in fig. 2, before a measurement test is carried out, a movable contact seat 14, a movable contact finger 15 and a static end 16 of the arc extinguish chamber are respectively supported and placed on a supporting vertical plate 1 on the left side of a movable end supporting frame 2, the movable end supporting frame 2 and a static end supporting frame 3; then, the hinged end of the connecting rod of the oscillating rod 10 is hinged with a transmission connecting rod 13 of the arc extinguish chamber; then, the servo motor 5 is started to rotate forwards, the sliding block 8 moves in a guiding mode along the sliding rail under the transmission of the screw and nut mechanism 6 to drive the swing rod 10 to swing, the hinged end of the connecting rod of the swing rod 10 drives the transmission connecting rod 13 of the arc extinguish chamber to move, the opening process of the circuit breaker is simulated, a friction force signal of the arc extinguish chamber can be collected through the pressure sensor 7, the collected signal is transmitted to the background through the pressure sensor 7, and a friction force curve in the motion process of the arc extinguish chamber is generated through real-time monitoring of the background. The servo motor 5 rotates reversely, and then the closing process of the circuit breaker can be simulated.
Taking the installation of an extra-high voltage GIS circuit breaker as an example, an operator can screen out sub-assemblies with consistent friction force according to an obtained friction force curve, the circuit breaker is assembled, the consistency of the friction force after the three-phase circuit breaker is assembled is realized, the synchronism and the stability of the opening and closing time of the three-phase circuit breaker are further improved, meanwhile, the phase selection and the opening and closing of the circuit breaker near a predetermined point can be realized, the overvoltage and the inrush current generated in the switching process are reduced, the impact on the system is reduced, the service lives of the circuit breaker and peripheral equipment thereof are prolonged, and the stability of an electric power system is improved.
In the above embodiments, the driving device uses a screw nut mechanism to drive the sliding block, and in other embodiments, the driving device may also use an electric push rod, a worm gear transmission mechanism, a rack and pinion transmission mechanism, or a chain transmission mechanism.
In the above embodiment, the driving device is disposed below the supporting stage to save the installation space, and in other embodiments, the driving device may be disposed above the supporting stage.
In the above embodiment, the swing axis horizontal extension of pendulum rod, the drive end of pendulum rod and connecting rod hinged end are located the both sides of brace table respectively, and in other embodiments, the swing axis vertical extension of pendulum rod, the drive end of pendulum rod and connecting rod hinged end also can set up simultaneously in the brace table top this moment, the position of the transmission connecting rod of the corresponding adjustment explosion chamber of needs this moment.
In the above embodiments, the swing rod is hinged to the slider, and the pressure sensor is pressed between the slider and the nut.
Claims (3)
1. Friction force measurement test device for circuit breaker explosion chamber, including a supporting bench, be equipped with on the supporting bench and be used for supporting the explosion chamber and move the end support frame that moves of end and be used for supporting the quiet end support frame of the quiet end of explosion chamber, its characterized in that: a swing rod hinged with a transmission connecting rod of the arc extinguish chamber is hinged to the supporting table, one end of the swing rod is a connecting rod hinged end hinged with the transmission connecting rod, and the other end of the swing rod is a driving end; the device comprises a support table, a driving device for applying force to the driving end to drive a swing rod to swing, a pressure sensor for measuring the friction force of an arc extinguish chamber is arranged between the driving device and the driving end of the swing rod, a slide block is assembled on the support table in a guiding and sliding mode, a hinged long hole is formed in the slide block, the driving end of the swing rod is hinged to the slide block through the hinged long hole, the pressure sensor is arranged between the slide block and the driving device, the driving device comprises a driving motor and a lead screw nut mechanism driven by the driving motor, the pressure sensor is pressed between a nut of the lead screw nut mechanism and the slide block, the driving device is arranged below the support table, the driving motor is arranged at one end, close to the arc extinguish chamber, of a lead screw, the swing axis of the swing rod extends along the horizontal direction, the hinged end of a connecting rod, the slider is connected with the transmission of lead screw nut mechanism, move with the drive lead screw nut mechanism through opening servo motor, and then promote the slider and move along the slide rail direction, be equipped with pressure sensor between the nut of slider and lead screw nut mechanism, pressure sensor pushes up between nut and slider, when the slider moves on the slide rail, pressure sensor can measure the resistance that the slider received, because the drive end and the slider of pendulum rod are articulated, when the slider moves, can drive the pendulum rod swing, thereby when the explosion chamber is placed on a supporting bench, the connecting rod hinged end of pendulum rod can drive the transmission connecting rod action of explosion chamber and accomplish the process of separating brake and closing of circuit breaker, the linear motion transmission through lead screw nut is the motion of explosion chamber promptly, the resistance that the slider received is the frictional force of explosion chamber promptly.
2. The friction force measurement test device for the arc extinguish chamber of the circuit breaker according to claim 1, wherein: the movable end support frame comprises a support vertical plate and reinforcing plates arranged on two sides of the support vertical plate.
3. The friction force measurement test device for the arc extinguish chamber of the circuit breaker according to claim 2, wherein: the static end support frame comprises a support vertical plate and reinforcing plates arranged on two sides of the support vertical plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811565507.6A CN109799018B (en) | 2018-12-20 | 2018-12-20 | Friction force measurement test device for arc extinguish chamber of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811565507.6A CN109799018B (en) | 2018-12-20 | 2018-12-20 | Friction force measurement test device for arc extinguish chamber of circuit breaker |
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| Publication Number | Publication Date |
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| CN109799018A CN109799018A (en) | 2019-05-24 |
| CN109799018B true CN109799018B (en) | 2021-04-09 |
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| CN201811565507.6A Active CN109799018B (en) | 2018-12-20 | 2018-12-20 | Friction force measurement test device for arc extinguish chamber of circuit breaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112710264B (en) * | 2020-12-14 | 2023-01-31 | 平高集团有限公司 | Circuit breaker overstroke measuring device and circuit breaker overstroke measuring system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202119577U (en) * | 2011-05-17 | 2012-01-18 | 山东泰开高压开关有限公司 | Measuring device of dynamic friction force of arc extinguishing chamber |
| CN203479502U (en) * | 2013-08-06 | 2014-03-12 | 江苏森源电气股份有限公司 | A mechanical characteristic online detecting apparatus |
| CN203536292U (en) * | 2013-10-21 | 2014-04-09 | 苏州科陆东自电气有限公司 | Major loop structure of vacuum circuit breaker and vacuum circuit breaker using same |
| CN203811311U (en) * | 2014-04-02 | 2014-09-03 | 上海思源高压开关有限公司 | High-voltage breaker arc-extinguish chamber kinetic friction force measurement apparatus |
| CN204903064U (en) * | 2015-08-21 | 2015-12-23 | 北京中顺恒昌科技有限公司 | Circuit breaker arc extinguishing unit friction force measuring device |
| CN205643643U (en) * | 2016-05-24 | 2016-10-12 | 山东泰开电力开关有限公司 | SF 6 circuit breaker explosion chamber pressure test frock |
| CN206516555U (en) * | 2017-01-20 | 2017-09-22 | 青岛特锐德电气股份有限公司 | SF 6 high-voltage AC series breaker |
| CN206806232U (en) * | 2017-04-24 | 2017-12-26 | 国家电网公司 | A kind of rectilinear transducer mounting bracket |
| CN108627330A (en) * | 2018-07-02 | 2018-10-09 | 河南华盛隆源电气有限公司 | Breaker operation mechanism running-in testing apparatus |
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