About the experience of balancing the cardan shaft directly on the motor grader
Bizning etakchi mutaxassisimiz va mijozlarimizdan biri o'rtasidagi eski yozishmalarni topdik.
O'n yil oldingi yozishmalar!
Muallif: Valeriy Davydovich
Introduction
Tan olaman, avtogreyder haydovchisi Andrey Kobyakovning bizga yozgan xati natijalari meni juda hayratda qoldirdi va quvontirdi.
His letter even surprised me – a specialist with more than 35 years of experience in the field of vibrodiagnostics and muvozanatlash. And for a long time I worked in the defense industry and balanced more than 1500 different machines and mechanisms starting from ordinary fans and smoke pumps and finishing with antenna guidance systems and unique gyroscopes.
And here for the first time in the field balancing of a powerful road machine – a motor grader!!!, the driver of which Andrey works.
Kardan mili, krank mili va debriyaj savatini to'g'ridan-to'g'ri greyderda muvozanatlash
Andrey acquired our balancing instrument “Balanset-1” quite recently – at the end of August this year (2012).
In a little over two months since then, he has managed not only to master the hardware and technology of balancing, but to eliminate without disassembly imbalance of the main units of his machine (driveshaft, crankshaft with clutch basket, wheels).
Endryu biz bilan yozishmalarida qilgan ishini shunday tasvirlaydi.
(Uning ruxsati bilan xatlarini qirqmasdan va tahrirsiz nashr etaman).
1. Letter from A. Kobyakov dated October 18, 2012
Salom, Valeriy Davydovich! Men sizga yozmoqchi edim. Men qurilma bilan ishlashni juda tez o'zlashtirdim va men kabi tayyor bo'lmagan odamlar uchun hamma narsa mavjud. Mening daftarim dasturni tuzatmasdan qabul qiladi. Men uni birinchi marta statsionar kompyuterga o'rnatdim, g'ildiraklarni muvozanatlashtirdim, natija shinalarni o'rnatishdan ko'ra yaxshiroq. 2 ta harakat valini joyida sinab ko'rdim, balanslash yaxshi ko'rinadi. Umuman olganda, qurilma o'rtacha narxda yaxshi funksionallik uchun umidlarimni qondirdi. Boshqa kuni men o'zim ishlayotgan motor greyderda volanni muvozanatlashtirdim. Dastlabki nomutanosiblik 8000 g * mm dan ortiq, qolgan nomutanosiblik taxminan 900 g * mm, bardoshlik 400 g * mm ni tashkil etdi. Buni yaxshiroq qilish mumkin edi, lekin ataylab tark etdi, chunki siz debriyaj moslamasini muvozanatlashingiz kerak bo'ladi. Keyin xuddi shu greyderda dvigatel-vites qutisi kardanini muvozanatlashimiz kerak bo'ladi. Bu avtogreyderlarning abadiy muammosi. Rahbarlarim ish haqida istehzo bilan qarashdi, lekin buni vaqt ko'rsatadi, deb o'ylayman.
Jarayonda savol tug'ildi: qanday qilib tuzatuvchi og'irliklarni bitta muvozanat vazniga yig'ish mumkin? Gimbalni muvozanatlashda bu qulayroqdir. Umuman olganda, menimcha, dastur shunday hisob-kitob qilsa, juda yaxshi bo'lardi.
2. Letter from A. Kobyakov dated October 31, 2012
Salom Valeriy Davydovich!
I want to tell you about the work done. As I told you, I tried balancing the clutch assembly. The first attempt was unsuccessful. Initial imbalance was over 28,000 g*mm. Made the conclusion- misalignment. After that the assembly was disassembled and inspected. Detected worn alignment holes in the clutch housing and abrasion of the adjacent housing flats. Intermediate disk normal, drives new, but of questionable quality (lining displaced). I chose the new one myself, only one of the four was balanced. That’s the case. Assembly was more carefully with the help of the device. My colleagues were giving me the finger with my temple. I made an interesting discovery: the intermediate disc is set only in one position out of three and the basket too. As a result I balanced it to 2600 g*mm. The mass of the whole assembly flywheel + intermediate drive + basket is about 80 Kilo, radius 430mm, speed 1900-2000 rpm. The engine is happy, it runs smoothly.
Keyinchalik kardan. Birinchi urinish yana muvaffaqiyatsizlikka uchradi, uning vazni 15 kilogramm, uzunligi 650 mm.
Men gardishlarni, xochlarni tekshirdim, hammasi joyida, lekin u bormadi. Men kardanni yechdim. Men uni yarim soatga aylantirdim. Shunga qaramay, men xochlardan birida engil radial harakatni ko'rdim. O'rgimchakning o'zgarishi, muvozanatlash.
Result: initial unbalance at the first plane 1600*mm, at the second plane 1000*mm. Residual unbalance at 1 plane 36 g*mm, at 2 plane 9 g*mm. Applause. Curtain. The bosses are shocked.
Valeriy Davidovich, mutaxassis sifatida bunday ishni qanday baholash mumkin?
3. Letter from A. Kobyakov dated November 7, 2012
Valeriy Davydovich, salom! Nihoyat, ishim natijalarini sizga yuboraman. Suratda shahrimizning birinchi “baxtli”si. Og'ir texnika u yoqda tursin, hatto mashinalarda ham hech kim balanslash bilan shug'ullanmagan. Faqatgina istisno - bu mening tajribalarim, ko'proq yoki kamroq muvaffaqiyatli.
Suratda biz juda katta qo'zg'aysan milini ko'rmoqdamiz, uning ustiga qo'rg'oshin tayoq segmentlari tasma qisqichlari bilan o'rnatilgan.
1-rasm 1 va 2-samolyotlarda tuzatuvchi og'irliklar o'rnatilgan kardanning fotosurati.
Bundan tashqari, payvandlangan zavod og'irligini ham ko'rishingiz mumkin. Videoda siz milning silliq aylanishini kuzatishingiz mumkin. Vites qutisi harakati yo'q (videoda chapda). Dvigatelning siljishi (o'ngda) kuzatilmaydi. Idishdagi shovqin sezilarli darajada kamayadi, tebranish deyarli sezilmaydi. 29/10/2012 balanslash daqiqalari haydovchi milini ta'mirlashdan oldin (bitta ko'ndalang elementni almashtirish). Ta'mirlashdan keyin 31/10/2012 daqiqalar. Protokollar bizning mexanik tomonidan tasdiqlangan, u tasodifan bu ishga juda salbiy qaragan.
(Eslatma: afsuski, videoning o‘zini topa olmadim.)
2-rasm 1 va 2-samolyotlarda tuzatuvchi og'irliklar o'rnatilgan kardan fotosurati.
3-rasm. 2-samolyotda tuzatuvchi og'irlikdagi gimbal fotosurati.
Tebranish saqlanib qoladi, lekin u dvigatelning old qismida, ehtimol, haydovchi kasnagi va fanda sezilarli. Endi greyder jangovar navbatchilikda va tajribalar to'xtatildi.
Men ikkinchi sinf o'quvchimizning volanini muvozanatlashni boshladim va to'g'ridan-to'g'ri ta'mirlashga qaytdim. Men krank milining eksenel va radial harakatini topdim. Ochilgach, u silliqlash kerakligini ko'rsatdi.
Agar fizika qonunlarini buzgan bo'lsam, meni kechiring, siz buni qila olishingizni bilmasdim.
Hurmat bilan, Endryu.
Kobyakovning xatlariga javob
Andrew, I compared your balancing results with the requirements for these rotors, which are reflected in ISO 22061-76 Machines and technological equipment. Balance quality grade system. General.
Natijalaringizni ushbu ISO tolerantliklari bilan solishtirish siz uchun qiziqarli bo'ladi deb o'ylayman.
1. Krank mili (shu jumladan debriyaj savati va boshqalar)
Tolerantlik 6-sinf aniqlik darajasiga mos kelishi kerak (1-ilova, 13-betga qarang).
Ushbu sinfda va 2000 aylanish tezligida har bir tekislik uchun ruxsat etilgan qoldiq muvozanat qiymatlari 40 dan 100 mkm gacha (3-betdagi diagrammalarga qarang).
80 kg rotoringiz uchun ruxsat etilgan qoldiq muvozanatga aylantirilganda, bardoshlik 3200 dan 8000 g* mm gacha.
Siz 2600 g* mm ga erishdingiz.
2. Kardan mili .
Tolerantlik 5-sinf aniqligi bo'lishi kerak (1-ilova, 13-betga qarang).
(Kardan shaftida siz tezlikni ko'rsatmadingiz va men uni shartli ravishda 2000 aylanish tezligida oldim).
Ushbu sinf va 2000 rpm aylanish tezligi uchun har bir tekislik uchun ruxsat etilgan qoldiq o'ziga xos muvozanatsizlik 15 dan 40 mkm gacha (3-betdagi diagrammalarga qarang).
15 kg universal qo'shma shaft uchun ruxsat etilgan qoldiq muvozanatiga aylantirilganda, bardoshlik 225 - 600 mm * mm ni tashkil qiladi.
Siz birinchi tekislikda 36 g * mm ga, ikkinchi tekislikda 9 g * mm ga erishdingiz !!!!.
Bu ta'sirli.
Hurmat bilan.
FVD
