Research on dynamic characteristics of spraying system of mine sprinklers based on AEMsim

doi:10.16265/j.cnki.issn1003-3033.2023.S2.0003

Abstract

Abstract:

The open-pit mine sprinkler is unable to autonomously adjust the spraying volume based on road dust concentration. To solve this problem, a variable spraying system powered by an engine and a swash plate plunger pump was designed. The mathematical model of the spraying system was designed, and the nozzle diameter of the spraying system was calculated to obtain the dynamic characteristics of the spraying system. The AMESim simulation model of the spraying system was established, the affects of the key parameters such as engine speed, plunger pump opening, and nozzle diameter on the spraying volume of the spraying system were analyzed by parametric simulation. The results show that increasing the tilt angle of the plunger pump and enhancing the engine speed can improve the stability of the system. The nozzle diameter of the variable spraying system is 2 mm. The nozzle enters an oscillation state and gradually stabilizes after 1.1 s. When the tilt angle opening of the swash plate is 0.95, it first enters an oscillation state and tends to stabilize. When the engine speed is 3 000 r/min, the oscillation time is short, which can reduce the system response time.

Key words: sprinkler, hydraulic system, AMEsim simulation analysis, autonomous adjustment, dynamic characteristics

CLC Number:

X936

WANG Han, TANG Yadong, YANG Guoji, YANG Baocheng, ZOU Qi, XIE Miao. Research on dynamic characteristics of spraying system of mine sprinklers based on AEMsim[J]. China Safety Science Journal, 2023, 33(S2): 140-144.

Figures/Tables 5

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模型参数名称	数值	模型参数名称	数值
弹簧预紧力/N	30	针阀质量/g	10
弹簧刚度/(N·mm^-1)	80	针阀密封接触长度/mm	45
控制腔进液孔通径/mm	0.13	针阀的密封通径/mm	5
控制腔出液孔通径/mm	0.34	针阀的配合间隙/mm	0.001 5
控制活塞通径/mm	10	针阀弹簧预紧力/N	35
控制活塞质量/g	25	喷流器内高压管的通径/mm	1.5
控制活塞配合间隙/mm	0.002	喷孔个数	1
针阀宽头通径/mm	1.9	喷孔通径/mm	0.6