Qurt uzatmasi nima va u qachon ishlatiladi?

Qurt uzatmasi qurt g'ildiragi (tishli g'ildirak) bilan ilashgan qurtdan (vintdan) iborat. Yagona bosqichda yuqori kamaytirish nisbatlari (5:1 dan 100:1 gacha), ixcham to'g'ri burchakli uzatmalar va o'z-o'zini bloklash talab etiladigan ilovalar (ko'tarish qurilmalari, konveyerlar) uchun qo'llaniladi.

Qurt uzatmasining FIK nimaga bog'liq?

Efficiency depends mainly on lead angle (γ) and friction coefficient (μ). η = tan(γ)/tan(γ+ρ) where ρ=arctan(μ). Higher lead angles (more starts) give better efficiency. Single-start: 40-65%, double-start: 60-80%, quad-start: 75-92%.

Qurt uzatmalarida o'z-o'zini bloklash nima?

O'z-o'zini bloklash qurt g'ildiragi qurtni harakatlantira olmaganda yuz beradi — ishqalanish burchagi qo'rg'oshin burchagidan katta bo'ladi (ρ > γ). Bu odatda FIK ~50% dan past bo'lganda kuzatiladi. Ko'tarish qurilmalari va yukni ushlab turish uchun foydali, ammo sezilarli issiqlik hosil qiladi.

Qurt uzatmasi nisbatini qanday hisoblash mumkin?

Gear ratio i = Z2/z1, where Z2 is the number of worm wheel teeth and z1 is the number of worm starts. For a single-start worm with a 40-tooth wheel: i = 40/1 = 40:1.

Qurtning qo'rg'oshin burchagi nima?

Lead angle γ = arctan(z1×m / d1), where z1 is number of starts, m is axial module, and d1 is worm reference diameter. Higher lead angle = better efficiency but no self-locking.

Bepul Muhandislik Vositasi #096

Qurt uzatmasi kalkulyatori

Qurt uzatma drayverlarini loyihalash. Modul, qurt boshlanishlari, g'ildirak tishlari va tezlikni kiriting — nisbat, FIK, qo'rg'oshin burchagi va o'z-o'zini bloklashni hisoblang. FIK odatda 50–90%.

Worm DriveSelf-LockingEfficiency

Results

Uzatma Nisbati & FIK

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Lead Angle (γ)

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Self-Locking

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Output Speed

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G'ildirak qadamining diametri

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Markazlar orasidagi masofa

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Gear Ratio

Lead Angle

Efficiency

O'z-o'zini blokirovka qilish γ < ρ (ishqalanish burchagi) bo'lganda, ya'ni FIK < ~50% bo'lganda yuz beradi.

Starts	Odatiy qo'rg'oshin burchagi	Odatiy FIK (foydali ish koeffitsienti)	Self-Locking?
1	2–6°	40–65%	Usually yes
2	6–12°	60–80%	Sometimes
3	10–18°	70–85%	Rarely
4	14–25°	75–92%	No