تاثیر پارامترهای عملیاتی بر سایش دیسک برشی ماشین حفاری tbm

دیسک برشی یکی از اصلی ترین اجزای حفاری با ماشین tbm در سنگ سخت است؛ از این رو سایش دیسک برشی در تونلزنی با ماشین حفاری tbm تاثیر عمده ای بر عملکرد ماشین حفاری، بهره‌وری آن و هزینه های تونل سازی دارد. بررسی سایش دیسک برشی خصوصاً با در نظر گرفتن اثر پارامترهای عملیاتی، پیشبینی مصرف دیسک را به یک کار دشوار تبدیل کرده است. هدف اصلی این پژوهش بررسی تاثیر پارامترهای عملیاتی بر سایش دیسک برشی ماشین حفاری است. پارامترهای کلیدی موثر بر سایش دیسک برشی مانند مقاومت سنگ، سایندگی سنگ، نیروی عمودی، نیروی چرخشی و میزان دور بر دقیقه (rpm) دیسک، بوده که مورد بررسی قرار می‌گیرد. نتایج مورد انتظار از مطالعه پارامتری شامل درک درجه اهمیت پارامترهای عملیاتی در سایش دیسک برشی برای انواع سنگ‌ها و برش‌دهنده‌های دیسکی انتخابی است. در نهایت، بین نتایج سایش دیسک برشی اندازه‌گیری شده توسط دستگاه آزمایش تمام مقیاس با پارامترهای عملیاتی مختلف، مقایسه‌ای انجام شده و تاثیرات آن بر سایش دیسک مشخص می شود.

effect of operating parameters on tbm disc cutter wear

the cutting disc is one of the main components in the tbm in hard rock; the disc cutter wear is investigated by considering the effect of operating parameters in order to increase the disc life and machine efficiency in this study. the key parameters affecting the cutting disc wear are rock strength, rock abrasiveness, the normal force (the trust force), rolling force, and the exact rotation speed of the disc (rpm), which have been investigated. finally, the effect of operating parameters on cutting disc wear is estimated using a full-scale cutting disc test.introduction disc cutter is one of the main components of the tbm machine in hard rock; therefore, the wear of the cutting disc in tunneling with a tbm machine has a major effect on the performance of the boring machine, its productivity, and tunneling costs. investigating the wear of the disc cutter, especially considering the effect of the operating parameters, has turned the disc consumption prediction into a difficult task. the main goal of this research is to investigate the effect of operational parameters on the wear of tbm disc cutters.methodology and approaches in order to investigate the phenomenon of wear and to predict the wear of cutting tools, index laboratory tests have been developed. by examining a theoretical relationship presented about disc cutter wear in this research, it has been determined that the two important factors of normal force and rolling force play a significant role in the calculation of disc wear. on the other hand, the results of the modified test on the full test are given, which show that with the changes in the applied load on the test pin, the wear of its tip also changes .therefore, one method to accurately examine cutting disc wear is to use laboratory methods, which make assessments more realistic by bringing the test closer to full scale. so, to investigate the effect of operating parameters on the wear behavior of the disc cutter, a full-scale test device was designed and manufactured by tunnelsaz machine company. interesting results have been presented by conducting rock-cutting simulation experiments and wear measurements on double-tip and single-tip disc cutters in the same laboratory conditions. in these tests, operating parameters such as the vertical force on the disc in both single-tip and double-tip types of discs, were equal to 80 kn and the rolling force was 8 kn.