DISKRET ELEMENTLAR USULI BILAN SHARLI TEGIRMONLARDA TUVURLOVCHI MUHIT HARAKATINI SIMULYATSIYA QILISH: METODOLOGIYA, TEKSHIRISH VA YEYILISHNI BASHORAT QILISHDA QO‘LLANILISHI
Referat
Sharli tegirmonlarda maydalovchi muhit va futerovkalarning yeyilishini bashorat qilish donador zaryadning qanday harakatlanishi va tegirmon korpusiga ta'sir etishi haqida batafsil ma'lumotga ega bo'lishni talab qiladi, bu ma'lumotni to'liq hajmdagi sanoat ekspluatatsiyasidan bevosita olish mumkin emas. Ushbu maqolada kon-texnika uskunalarining chidamliligi va holat diagnostikasi bo'yicha ishlab chiqilgan Diskret Elementlar Usuli (DEM) simulyatsiya metodologiyasi taqdim etilgan bo'lib, u aylanuvchi sharli tegirmonda maydalovchi muhit harakatini va natijada yuzaga keladigan kontakt kuchlarini modellashtirish uchun mo‘ljallangan. Model har bir maydalovchi sharni Nyutonning ikkinchi qonuniga bo‘ysunuvchi alohida jism sifatida ko‘rib chiqadi va sharlararo hamda sharlar-futerovka o‘rtasidagi o‘zaro ta'sirlarni Kulon ishqalanishiga ega chiziqli prujina-damper kontakt modeli yordamida hal qiladi, vaqt bo‘yicha aniq "leapfrog" sxemasi bilan integrallaydi hamda ROCKY DEM dasturiy ta'minotida amalga oshiriladi. Simulyatsiyalar aylanish tezligi, to‘ldirish darajasi va shar diametrini qamrab olgan omilli ish sharoitlari to‘plami uchun o‘tkazildi hamda hosil bo‘lgan zaryad kinematikasi va kontakt kuchlari tegirmon qo‘zg‘alish tizimining chekli elementlar modeli bilan bog‘lanib, zarba ta'siridan kelib chiqadigan reduktor tebranishlarini baholashga imkon berdi. DEM modeli sanoat tegirmonida to‘liq hajmdagi "flash-stop" (to‘satdan to‘xtatish) tajribalari asosida tekshirildi, bunda bashorat qilingan zaryad burchaklari (yelka, oyoq, chiqish va zarba nuqtasi) o‘lchangan qiymatlar bilan 4% gacha xatolikda mos keldi. Natijalar shuni ko‘rsatadiki, to‘ldirish darajasi va aylanish tezligi kontakt kuchining kattaligi, tushish balandligi hamda kaskadli harakatdan kataraktli harakatga o‘tishga kuchli ta'sir ko‘rsatadi va DEM asosida olingan zarba statistikasi futerovkalarning yeyilishining akustik ko‘rsatkichlari bilan bog‘liqdir. Olingan xulosalar tasdiqlangan DEM simulyatsiyasi sanoat sharli tegirmonlarida yeyilishni bashorat qilish, ish rejimini optimallashtirish va holatga asoslangan diagnostika uchun ishonchli asos yaratishini ko‘rsatadi.
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