Design and Analysis on Operating Mechanism of Smart Miniature Circuit Breakers

doi:10.16628/j.cnki.2095-8188.2024.07.007

Abstract

Abstract:

For smart miniature circuit breakers,a schematic diagram of the mechanism motion is drawed,the size of the four connecting rods of the operating mechanism is adjusted, and the motion trajectory of the operating mechanism is analyzed.Combined with the static analysis to analyze the force situation of the operating mechanism at certain steady-state positions,the contact parameters of the smart miniature circuit breaker (opening distance,overtravel,final pressure,driving unit force) are calculated,which provides a new design direction for the design and analysis of the operating mechanism of smart miniature circuit breakers.

Key words: smart miniature circuit breaker, operating mechanism, static analysis, contact parameter

CLC Number:

TM561

SHENG Yongbing, TANG Fulong, ZHANG Jin, RU Dezhi, LI Junting, YUE Kang. Design and Analysis on Operating Mechanism of Smart Miniature Circuit Breakers[J]. LOW VOLTAGE APPARATUS, 2024, 0(7): 50-53.

Figures/Tables 5

References 9

[1]	陈德桂, 刘庆江, 康艳. 塑壳断路器操作机构分断速度的影响因素[J]. 低压电器, 2005(12):9-12.
[2]	张良程. 低压微型断路器的机构分析[J]. 科技与创新, 2015(19):112.
[3]	范承勇. 真空断路器传动系统中配重对合/分闸机械特性的影响[J]. 电工电气, 2010(6):28-30.
[4]	蒋顾平, 顾惠民. 提高塑壳断路器操作机构动作速度的研究[J]. 电器与能效管理技术, 2015(1):21-23.
[5]	潘庆元. 小型断路器操作机构的运动及静力分析[J]. 电器与能效管理技术, 2018(14):7-12.
[6]	连理枝. 低压断路器设计与制造[M]. 北京: 中国电力出版社, 2003.
[7]	周茂祥. 低压电器设计手册[M]. 北京: 机械工业出版社, 1992.
[8]	张策. 机械原理与机械设计[M]. 北京: 机械工业出版社, 2004.
[9]	陈文华, 张文, 潘骏, 等. 小型断路器操作机构的动作可靠性分析[J]. 中国机械工程, 2015, 26(21):2918-2922.

尺寸	标称尺寸		允差值	敏感度/%
尺寸	+	-	允差值	敏感度/%
手柄与手柄轴		a	±0.050	1.41
手柄	b		±0.120	8.11
手柄孔与连杆	c		±0.050	1.41
连杆		g	±0.200	22.54
连杆与滑块1孔	d		±0.050	1.41
套筒与滑块1孔	e		±0.100	5.63
套筒与滑块2		h	±0.050	1.41
套筒与推杆	f		±0.080	3.61
驱动单元		h	±0.150	12.68
滑块3	e		±0.150	12.68
推杆	d		±0.150	12.68
滑块3与触头支架		g	±0.080	3.61
触头支架与动触头	c		±0.100	3.61
触头支架	b		±0.100	5.63
动触头		a	±0.100	3.61

测试样品编号	开距/mm	超程/mm	终压力/N
1	7.80	1.65	5.0
2	7.50	1.73	5.3
3	7.90	1.62	4.8
4	7.60	1.70	5.2
5	7.80	1.65	5.1
平均值	7.72	1.67	5.2

[1]	LI Peng. Design on Operating Mechanism Key Parameters of Moulded Case Circuit Breaker [J]. LOW VOLTAGE APPARATUS, 2024, 0(3): 47-52.
[2]	WANG Bin, ZHAO Dayong, LI Qian. Estimation of Impact Fatigue Life of Spring Operating Mechanism’s Opening Gusset Plate [J]. LOW VOLTAGE APPARATUS, 2024, 0(1): 31-37.
[3]	PAN Xuan, LI Tao, HOU Kui, LIU Fengfeng. Analysis and Research on Key Component Characteristics of ACB Based on NX Motion Simulation [J]. LOW VOLTAGE APPARATUS, 2023, 0(8): 76-82.
[4]	WEI Bo, ZHAO Zhisheng, ZHAO Ming, SHENG Yongbing, REN Changbin. Structural Design and Analysis of Smart Miniature Circuit Breaker’s Electric Operating Mechanism [J]. LOW VOLTAGE APPARATUS, 2023, 0(4): 47-55.
[5]	ZHOU Qiang. Matching Calculation Analysis and Application of Medium Voltage Vacuum Circuit Breaker Operating Mechanism Counterforce Characteristic [J]. LOW VOLTAGE APPARATUS, 2022, 0(7): 67-72.
[6]	WU Shuyao, MA Shaohua. Dynamic Simulation on Operating Mechanism of Vacuum Circuit Breaker and Fatigue Life Analysis on Push Rod [J]. LOW VOLTAGE APPARATUS, 2022, 0(11): 14-18.
[7]	HUANG Jia, SHI Keshao, ZHAO Ming, SHENG Yongbing, ZHANG Yanyang, REN Changbin. Optimal Designof Operating Mechanism of Miniature Circuit Breaker [J]. LOW VOLTAGE APPARATUS, 2022, 0(10): 62-64.
[8]	ZHANG Chen, WU Weiyu, LIU Wanli, MA Shuangbiao. Dynamic Simulationand Research on Buffer Device of AIR Circuit Breaker Operating Mechanism of Based On ADAMS [J]. LOW VOLTAGE APPARATUS, 2022, 0(1): 57-62.
[9]	XU Xiaodong, LIAN Yunfei, GAO Fei. Dynamic Simulation of Air Circuit Breaker Based on NX Motion [J]. LOW VOLTAGE APPARATUS, 2021, 0(6): 52-57.
[10]	TANG Ting, WANG Taiyu, XU Pengsheng, XIE Lingfeng. Study on Operation Mechanism and Stress Analysis of MCCB [J]. DIANQI YU NENGXIAO GUANLI JISHU, 2020, 0(4): 47-53.
[11]	MA Longtao, DAI Minglei. Research on Fatigue Life Simulation of Operation Mechanism of Molded Case Circuit Breaker [J]. DIANQI YU NENGXIAO GUANLI JISHU, 2020, 0(3): 8-13.