免費工程工具 #022
振動限值 — 燃氣渦輪機
依據 ISO 20816-4 評估燃氣渦輪機的振動嚴重度。支援工業型、航空衍生型及小型燃氣渦輪機的軸承座速度與軸相對位移。
結果
| 公差帶 | 邊界 | 說明 |
|---|
ISO 20816-4 適用範圍
ISO 20816-4 規範了用於發電與機械驅動應用之燃氣渦輪機的振動評估準則。涵蓋工業重型燃氣渦輪機、航空衍生型燃氣渦輪機，以及 3 MW 以下的小型燃氣渦輪機。
軸承座振動 (工業重型)
於軸承座測得之寬頻振動速度，單位為 mm/s RMS，頻率範圍 10–1000 Hz。
| 區域邊界 | 振速 (mm/s RMS) |
|---|---|
| A/B | 4.5 |
| B/C | 9.3 |
| C/D | 14.7 |
軸相對位移 (工業型)
使用近接感測器測量的軸振動，以 μm 為單位的峰對峰位移表示。下方的固定數值為簡化的保守指導；標準的軸位移區域邊界取決於轉速（隨軸轉速增加而降低）。
| 區域邊界 | 位移 (μm p-p) |
|---|---|
| A/B | 65 |
| B/C | 130 |
| C/D | 200 |
燃氣渦輪機類型
| 類型 | 功率範圍 | 典型轉速 | 特性 |
|---|---|---|---|
| 工業重型 | >40 MW | 3000–3600 RPM | 單軸、滑動軸承、重型轉子 |
| 航空衍生型 | 20–60 MW | 3600–15000+ RPM | 多軸系、較輕轉子，可能使用滾動軸承 |
| 小型 (<3 MW) | <3 MW | 變頻 | 模組化機組、微型渦輪機、工業驅動 |
ℹ️ 注意： 對於航空衍生型與小型燃氣渦輪機，所示區域邊界係以工業重型數值作為一般參考指南。特定製造商的限值可能有所不同。請務必諮詢您特定機器的原廠 (OEM) 振動規格。
⚠️ 重要： 燃氣渦輪機通常配備自動振動跳脫系統。請確保保護系統設定值與 ISO 20816-4 區域邊界或原廠規格一致。切勿停用振動保護系統。
ISO 20816-4 covers all types of gas turbines used in power generation and mechanical drive:
- Industrial heavy-duty — Large frame machines typically >40 MW (e.g., GE Frame 7/9, Siemens SGT-800/2000)
- Aero-derivative — Derived from aircraft engines, typically 20–60 MW (e.g., GE LM2500/LM6000, Rolls-Royce Trent)
- Small gas turbines — Units below 3 MW including microturbines and small industrial drives
Strictly, the ISO standard itself addresses gas-turbine sets with fluid-film bearings; applying its guideline values to aero-derivative or small units with rolling-element bearings is a simplified non-ISO extension.
Bearing housing vibration is measured with sensors (accelerometers or velocimeters) mounted on the bearing pedestal. It provides overall machine vibration in mm/s RMS and is the most common measurement for protection and monitoring.
Shaft relative displacement is measured with proximity (eddy current) probes installed inside the bearing clearance. It measures the actual shaft orbit in μm peak-to-peak and is essential for detecting rotor dynamic issues that may not be visible on the bearing housing.
Gas turbines generally have higher allowable vibration limits due to:
- Combustion-induced vibration — a source not present in steam turbines
- Higher power density and different rotor dynamics
- Operating environment factors (thermal gradients, fuel variations)
- Different bearing and support configurations
For example, bearing housing velocity Zone A/B boundary is 4.5 mm/s for gas turbines (ISO 20816-4) vs. 2.8 mm/s for steam turbines (ISO 20816-2).
Aero-derivative gas turbines have unique characteristics:
- Multi-spool design — gas generator and power turbine rotate at different speeds
- Higher speeds — gas generator may run at 8000–15000+ RPM
- Rolling element bearings — some aero-derivatives use ball/roller bearings instead of journal bearings
- Lighter rotors — more responsive to unbalance and thermal effects
The zone boundaries in this calculator apply as general guidelines; always check OEM specifications for your specific machine.
A sudden vibration increase on a gas turbine requires immediate investigation:
- Check combustion dynamics — combustor issues can cause sudden vibration spikes
- Foreign object damage (FOD) — blade loss causes immediate unbalance
- Bearing deterioration — sudden change may indicate bearing failure
- Coupling problems — misalignment or coupling component failure
- Thermal transients — rapid load changes can cause temporary rotor bowing
Most gas turbines have automatic vibration trip systems. Never override or bypass vibration protection.
本頁所述的操作流程由 Vibromera 團隊使用 Balanset-1A（一款用於現場轉子平衡的便攜式雙通道動平衡儀及振動分析儀）開發並經過實地測試。
用於渦輪機械的專業振動分析儀與現場動平衡系統。依據 ISO 20816-4 現場評估燃氣渦輪機狀態。已應用於 50 多個國家。
Nikolai Shelkovenko
Nikolai Shelkovenko是一名振動分析工程師，也是Vibromera的創辦人兼執行長。 15年多來，他一直在現場——而非在試驗台上——為旋轉設備進行動平衡校正：粉碎機、工業風機、破碎機、離心機、軸與主軸。正是這些實際工作催生了Balanset系列儀器——它們被設計為一種專業人員可以隨身攜帶到機器旁、在現場獨立使用的工具，而非實驗室設備。 Vibromera成立於2017年，自2023年起總部設於葡萄牙波爾圖。Balanset系列產品的研發、組裝與支援均在此完成。旗艦產品是Balanset-1A，一款用於單平面及雙平面動平衡校正與振動診斷的可攜式分析儀。 Nikolai親自參與客戶支援工作，處理各種棘手的動平衡校正案例，並參與軟體開發。他以任何語言為全球客戶提供服務。
