Dynamic analysis and experimental study of direct-acting centrifugal speed limiter

Abstract

In response to the issues of significant braking error and low sensitivity associated with the ratchet-claw centrifugal speed limiters, this study proposes a direct-acting centrifugal speed limiter (DCSL) characterized by minimal braking error and heightened sensitivity. A triggering model for the DCSL has been established through dynamic analysis and simulated using MATLAB to elucidate the interrelationships between the total mass of the centrifugal blocks, the rigidity of the speed regulating spring (SRS), the pre-compression, and the release rotational speed of the speed limiter. A mathematical model of the speed limiter has been constructed by setting parameters. An experimental platform for speed limiter detection has been established, and MATLAB has been utilized to mathematically model the experimental data to verify the applicability and reliability of the mathematical model. The results indicate that the triggering system of the DCSL meets the characteristic that the greater the stiffness and pre-compression of the SRS and the smaller the total mass of the centrifugal blocks, the higher the release rotational speed of the speed limiter, which aligns with the expected design. The braking rotational speed error between the mathematical model and the experimental data ranges from 0.73% to 1.76%, meeting the requirements of engineering applications. Through multiple linear regression, the speed limitation range and capability of the speed limiter under the premise of achieving design requirements have been investigated. The error between the mathematical model values and the experimental values at different pre-compressions of the SRS is in the range from 0.01% to 2.66%, all within the specified error range. The DCSL boasts a fast start-up speed and a broad speed range, significantly enhancing the safety of elevator operation systems, reducing the risk of accidents, and providing robust assurance for the continuity and stability of elevator operations.

Keywords

Direct-acting centrifugal speed limiter dynamic analysis parameters simulation data processing experimental verification

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References

Wang

Feng

. Research on collection and preprocessing of multisource heterogeneous elevator data. In: 2020 IEEE International conference on power, Intelligent computing and systems (ICPICS), Shenyang, China, 28–30 July 2020, pp.490–493. New York: IEEE

Gao

Teng

Yuan

. Applied Technology the test of elevator running mileage (dynamic) of scientific significance. Adv Mater Res 2014; 1022: 277–281.

Feng

Chen

Zhang

, et al. Discussion on improving safety in elevator management. In: 2020 2nd International conference on machine learning, Big data and business intelligence (MLBDBI), Shanghai, China, 2020, pp.195-198.

Lan

Jiang

Qiu

, et al. Statistical analysis of typical elevator accidents in China from 2002 to 2019. Appl Math Nonlinear Sci 2021; 6(2): 193–208.

Feng

Chen

Chang

. Analysis of the hidden danger for old elevator safety. In: 2020 3rd International conference on electron device and mechanical engineering (ICEDME), Shanghai, China, 2020, pp.605–608.

Zhang

Feng

, et al. The statistics and analysis of annual fault repair report of an elevator company. In: 2020 2nd International conference on machine learning, Big data and business intelligence (MLBDBI), Shanghai, China, 2020, pp.576-579.

State Administration for Market Regulation. Notice on the safety status of special equipment in China for the year 2023. China Special Equipment Safety 2024; 40(04): 1–3. Beijing, China: State Administration for Market Regulation.

Prahlow

Ashraf

Plaza

, et al. Elevator-related deaths. J Forensic Sci 2020; 65(3): 823–832.

Chen

XD.

Android-based non-contact elevator overspeed governor speed measuring system. In: 2016 3rd International conference on mechatronics and information technology (ICMIT 2016), 2016, pp.67–71. Atlantis Press.

10.

Yang

Liang

. Condition monitoring and fault diagnosis for an antifalling safety device. Shock Vib 2015; 2015(1): 12.

11.

Vermalle

. 14th Aerospace Mechanisms Symposium: proceedings of a symposium held at NASA. Hampton, VA: Langley Research Center, 1980. Vol. 2127, pp.93.

12.

Gradziel

Holgerson

. Aerospace conference, 2008 IEEE, 1–8 March 2008, p.1–20.

13.

Lonkwic

Szydło

. Selected parameters of the work of speed limiter in line straining system in a frictional lift. Adv Sci Technol Res J 2014; 8(21): 73–77.

14.

Xie

Liu

Wang

, et al. Design and analysis of a novel mini-type centrifugal friction speed limiter. Appl Mech Mater 2014; 496-500: 677–682.

15.

Tian

, et al. Design of the integrated device new speed governor and safety gear. In: Wang

Martinsen

, et al. (eds) Advanced Manufacturing and Automation X. Singapore: Springer, 2021, pp.364–370.

16.

Cenitagoya

Remirez

Cabello

, et al. Novel elevator overspeed governor design and multibody dynamic analysis. J Test Eval 2022; 50(5): 2410–2421.

17.

Song

Sun

. Design of structural parameters for centrifugal elevator overspeed governors. Sensors & Transducers 2014; 163(1): 171.

18.

Bian

. Emulational and experimental research on the triggering theory of bi-directional centrifugal elevator over-speed governors. Chin J Constr Mach 2017; 15(05): 377–382.

19.

Song

Chen

. Design of structural parameters of centrifugal elevator overspeed governors. Telkomnika 2014; 12(4): 2480–2488.

20.

. Discussion on the design and calculation of eccentric block type overspeed governor of elevator. China Elev 2020; 31(13): 32–34.

21.

Maulud

Abdulazeez

. A review on linear regression comprehensive in machine learning. J Appl Sci Technol 2020; 1(2): 140–147.

22.

Brown

. Multiple linear regression analysis: a matrix approach with MATLAB. Ala J Math 2009; 34(1): 1–3.