Muhandislik uchun bepul vosita
Quvurdagi Oqim Tezligi Kalkulyatori
Calculate flow velocity v = 4Q/(πd²), Reynolds number, and check against recommended velocity limits for hydraulic and water systems.
Results
Oqim Tezligi Formulasi
Aylana quvurdagi o'rtacha oqim tezligi uzluksizlik tenglamasidan Q = v × A asosida aniqlanadi:
- v — o'rtacha oqim tezligi (m/s)
- Q — hajmiy oqim tezligi (m³/s)
- d — quvurning ichki diametri (m)
- A — quvurning kesim yuzasi (m²)
Reynolds soni
Reynoldsov soni oqim rejimini belgilaydi — laminар, o'tish yoki turbulent:
- Re < 2300 — Laminar oqim (silliq, tartibli)
- 2300 ≤ Re ≤ 4000 — O'tish rejimi (beqaror)
- Re > 4000 — Turbulent oqim (tartibsiz, yuqori ishqalanish)
Tavsiya etilgan tezlik chegaralari
| Line Type | Velocity (m/s) | Tezlik (ft/s) | Notes |
|---|---|---|---|
| Gidravlik so'rish | 0.5 – 1.5 | 1.6 – 4.9 | Nasos kirish qismida kavitatsiyadan qochish |
| Gidravlik bosim | 3.0 – 6.0 | 9.8 – 19.7 | Qisqa quvur uchun 7 m/s gacha |
| Gidravlik qaytarish | 2.0 – 4.0 | 6.6 – 13.1 | Past bosimli, kattaroq quvurlar maqbul |
| Water supply | 1.0 – 3.0 | 3.3 – 9.8 | Binolarda shovqin chegarasi ~2,5 m/s |
| Bug' (to'yingan) | 20 – 40 | 66 – 131 | Bug' uchun yuqori tezlik odatiy hisoblanadi |
| Compressed air | 6 – 15 | 20 – 49 | Tezlik ortishi = bosim yo'qotishining ortishi |
Quvur jadval ma'lumotnomasi — tashqi diametr va devor qalinligidan ichki diametrni aniqlash
Tashqi diametr, devor qalinligi va ichki diametr ko'rsatilgan keng tarqalgan po'lat quvur o'lchamlari (Schedule 40):
| Nominal | OD (mm) | Wall (mm) | ID (mm) |
|---|---|---|---|
| DN15 (½″) | 21.3 | 2.77 | 15.8 |
| DN20 (¾″) | 26.7 | 2.87 | 20.9 |
| DN25 (1″) | 33.4 | 3.38 | 26.6 |
| DN32 (1¼″) | 42.2 | 3.56 | 35.1 |
| DN40 (1½″) | 48.3 | 3.68 | 40.9 |
| DN50 (2″) | 60.3 | 3.91 | 52.5 |
| DN65 (2½″) | 73.0 | 5.16 | 62.7 |
| DN80 (3″) | 88.9 | 5.49 | 77.9 |
| DN100 (4″) | 114.3 | 6.02 | 102.3 |
| DN150 (6″) | 168.3 | 7.11 | 154.1 |
| DN200 (8″) | 219.1 | 8.18 | 202.7 |
Amaliy Misol
Given: Q = 60 L/min, Pipe ID = 25 mm, Oil viscosity = 32 cSt
Convert: Q = 60 / 60000 = 0.001 m³/s, d = 0.025 m
A = π/4 × 0.025² = 4.909 × 10⁻⁴ m²
v = 0.001 / 4.909×10⁻⁴ = 2.04 m/s
Re = 2.04 × 0.025 / (32 × 10⁻⁶) = 1,592 → Laminar
2,04 m/s tezlik bosimli quvurlar uchun tavsiya etilgan diapazon doirasida (3–6 m/s optimal, lekin 2 m/s ham maqbul).
⚠️ Note: Hisoblangan tezlik — quvur ko'ndalang kesimi bo'yicha o'rtacha tezlik. Haqiqiy tezlik devor yaqinidagi noldan markazdagi maksimalgacha o'zgarib boradi (laminar oqim uchun parabolik profil).
Professional dala balansirovka asboblari va dasturiy ta'minot. 50dan ortiq mamlakatda qo'llaniladi.
