Research on Method of Improving Load Capacity Within Limited Volume of Crystal Cover Sealed Electromagnetic Relay

doi:10.16628/j.cnki.2095-8188.2025.02.003

Abstract

Abstract:

Sealed electromagnetic relays used in the aerospace field are characterized by small size and strong environmental adaptability.In view of the demand of high load capacity under the limited volume of the relay,firstly,the product failure mechanism of the relay under high load condition was analyzed.Based on the single factor analysis method,the main influencing factors of the shape and position parameters affecting the maximization of space were determined by taking the maximum threshold of the holding force and the maximum suction voltage of the electromagnetic system as the upper and lower limits.The design scheme of maximizing the increase of contact opening distance was realized.Subsequently,schemes such as installing a heat sink,adding SF6 arc extinguishing atmosphere,and adding a permanent magnet arc extinguishing in the limited space were tried respectively.Based on the comparison of the test results,the design of the relay within the limited volume was determined,and the principle prototype was made and the production test was carried out.Finally,according to the results of the high-temperature life test,it was determined that the installation of heat sink was the optimal design scheme.

Key words: sealed electromagnetic relays, load capacity, failure mechanism, limited volume, improved reliability

CLC Number:

TM581

ZHANG Yongjian, YOU Jiaxin, WU Di, XUE Yutong, GONG Shijia, ZHAN Xiaoyu. Research on Method of Improving Load Capacity Within Limited Volume of Crystal Cover Sealed Electromagnetic Relay[J]. LOW VOLTAGE APPARATUS, 2025, 0(2): 15-23.

Figures/Tables 25

References 18

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被测触点编号	首次失效次数/次	被测触点编号	首次失效次数/次
A₁	18 746	C₁	28 659
A₂	19 713	C₂	15 795
B₁	18 075	D₁	—
B₂	29 281	D₂	—

触点	动合分断燃弧时间/ms	动合吸合燃弧时间/ms	静合吸合燃弧时间/ms	静合分断燃弧时间/ms
B₁	0.77	0.53	1.51	1.24
E₁	0.27	0	0.40	0.31

参数	寿命试验后样品				寿命试验前样品
参数	4号继电器	5号继电器	6号继电器	7号继电器	1号继电器	2号继电器	3号继电器
吸合电压/V	11.8	11.8	12.0	11.7	14.2	14.1	15.8
释放电压/V	1.40	1.60	1.50	1.27	3.00	2.60	3.30
释放时间/ms	1.53	1.82	1.48	2.08	1.10	1.20	1.03
释放回跳次数/次	27	10	14	9	44	30	37
释放回跳时间/ms	4.65	1.78	3.14	2.73	2.31	1.91	2.52
吸合时间/ms	3.38	3.68	3.67	3.57	3.69	3.76	3.78
吸合回跳次数/次	19	8	7	12	6	11	10
吸合回跳时间/ms	1.14	0.40	0.48	1.07	0.27	0.55	0.37

参数	实验					均值
参数	1号	2号	3号	4号	5号	均值
燃弧拉断距离/mm	0.53	0.40	0.55	0.55	0.35	0.476

衔铁减短值/ mm	增加的衔铁行程/(°)	减短后的衔铁行程/(°)	减短后的触点开距/mm
0.2	0.185	6.72	0.297~0.327
0.4	0.381	6.91	0.315~0.335
0.6	0.590	7.12	0.334~0.364
0.8	0.813	7.34	0.355~0.384
1.0	1.051	7.58	0.377~0.407
1.2	1.306	7.84	0.400~0.430
1.4	1.579	8.11	0.425~0.455
1.6	1.864	8.39	0.452~0.482
1.8	2.192	8.72	0.482~0.512
2.0	2.536	9.07	0.514~0.544