Nima uchun muftalarni balanslashtirish kerak?

Couplings rotate at shaft speed and any unbalance creates a centrifugal force proportional to mass × eccentricity × ω². Even small coupling unbalance can cause significant vibration at high speeds, especially in precision machinery.

Muftalar uchun qaysi balans sifat sinfi qo'llanilishi kerak?

Ko'pgina egiluvchan muftalar G6.3 yoki G16 sinfiga tegishli. Turbomashinalardagi aniqlik muftalariga G2.5 yoki G1.0 talab qilinishi mumkin. API 671 standartiga ko'ra, mufta disbalansi hisoblangan ISO sinf qiymati yoki maxsus API chegaralaridan kichigidan oshmasligi kerak.

Mufta disbalansi rotor disbalansidan nimasi bilan farq qiladi?

The formula is identical — U = e × m, where e = G×1000/ω. However, coupling unbalance must be considered separately because it acts at the coupling location, which may amplify its effect depending on the distance to bearings.

API 671 standartida mufta balanslashtirishiga qo'yiladigan talab qanday?

API 671 requires coupling components to be balanced individually to a level that the residual unbalance does not exceed 10W/n (oz·in) or the ISO 21940-11 Grade G1.6 calculation, whichever is less. W = journal weight (lb), n = max speed (RPM).

Yarim muftami yoki to'liq muftami balanslashtirish kerak?

Har bir yarim mufta alohida-alohida balanslashtirilishi kerak, chunki to'liq mufta har doim ham bir xil yo'nalishda yig'ilmasligi mumkin. Hisob-kitob uchun har bir yarim muftaning massasidan foydalaning, so'ngra yig'ilgan muftaning balansini tekshiring.

Bepul Muhandislik Vositasi — #016

Muftaning muvozanatsizlik tolerantligi kalkulyatori

ISO 21940-11 balans sifat sinflari yordamida muftalar uchun ruxsat etilgan disbalansni hisoblang. Muftaning massasini, maksimal aylanish tezligini va sinfni kiriting.

ISO 21940-11API 671Couplings

Coupling Mass (kg)

Maximum Speed (RPM)

Balans sifati darajasi G

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Mufta uchun ruxsat etilgan muvozanatsizlik

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Solishtirma muvozanatsizlik (ekssentrisitet)

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Burchak tezligi ω

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Balance Grade

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Qo'llanilgan samarali massa

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Mufta uchun ruxsat etilgan muvozanatsizlik

Muftalar uchun ham xuddi shu ISO 21940-11 formulasi qo'llaniladi:

G — balanslashtirish sifati darajasi (mm/s)
ω — angular velocity = 2π × n / 60 (rad/s)
m — mufta massasi (kg)

API 671 talabi

API 671 bo'yicha maxsus maqsadli muftalar uchun har bir mufta komponentining ruxsat etilgan muvozanatsizligi quyidagicha chegaralanadi:

Bu yerda W — jurnal uchun statik og'irlik (funt), n esa maksimal uzluksiz aylanish tezligi (RPM).

Amaliy Misol

Misol — Disk mufta

Given: Coupling mass = 15 kg, Speed = 3600 RPM, Grade = G6.3

ω = 2π × 3600 / 60 = 376.99 rad/s

e_per = 6.3 × 1000 / 376.99 = 16.71 μm

U_per = 16.71 × 15 = 250.7 g·mm

⚠️ Note: Yarim mufta muvozanatlashtirilganda umumiy mufta massasining yarmidan foydalaning. Montajdan so'ng yig'ilgan muftaning muvozanatini albatta tekshiring.

Mufta Disbalansi Tolerantligini Hisoblash Kalkulyatori | ISO 21940 | Bepul Onlayn Vosita

Published by Nikolai Shelkovenko on Fevral 15, 2026 Fevral 15, 2026

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Mufta uchun ruxsat etilgan muvozanatsizlik

API 671 talabi

Amaliy Misol

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