Libreng Kasanayan sa Inhinyero
Mga Limitasyon sa Temperatura ng Bahagi
Interactive reference para sa maximum operating temperatures ng bearings, seals, lubricants, electric motors, at elastomers. Ilagay ang iyong sinukat na temperatura upang suriin ang safe limits.
Results
Bearings
| Component | Max Continuous | Max Short-term |
|---|---|---|
| Pamantayan na steel bearing (through-hardened) | 120 °C | 150 °C |
| Bearing sa mataas na temperatura (special steel) | 200 °C | 250 °C |
| Ceramic hybrid bearing | 300 °C | 350 °C |
| Bearing grease (standard lithium) | 120 °C | 130 °C |
| Bearing grease (synthetic polyurea) | 160 °C | 180 °C |
Seals
| Material | Min Temp | Max Continuous | Max Short-term |
|---|---|---|---|
| NBR (Nitrile) | −30 °C | 100 °C | 120 °C |
| FKM (Viton) | −20 °C | 200 °C | 230 °C |
| PTFE | −200 °C | 260 °C | 300 °C |
| EPDM | −50 °C | 150 °C | 170 °C |
| Silicone | −60 °C | 200 °C | 230 °C |
Lubricants
| Type | Max Continuous |
|---|---|
| Mineral oil | 90 °C |
| Synthetic PAO | 150 °C |
| Synthetic ester | 180 °C |
| PFPE (perfluorinated) | 260 °C |
| Lithium grease | 120 °C |
| Polyurea grease | 160 °C |
Electric Motors — Insulation Class (IEC 60034-1)
| Class | Max Winding Hotspot |
|---|---|
| Class A | 105 °C |
| Class B | 130 °C |
| Class F | 155 °C |
| Class H | 180 °C |
Rubber / Elastomers
| Material | Min Temp | Max Continuous |
|---|---|---|
| Natural rubber | −50 °C | 80 °C |
| Neoprene | −40 °C | 100 °C |
| Silicone rubber | −60 °C | 200 °C |
| Polyurethane | −30 °C | 80 °C |
Temperature Conversion
Lahat ng internal data ay nakaimbak sa °C. Ang conversion sa pagitan ng Celsius at Fahrenheit:
Status Thresholds
- OK (Green): ang sinukat na temperatura ay mas mababa sa 80% ng maximum continuous limit
- Babala (Dilaw): ang sinukat na temperatura ay nasa pagitan ng 80% at 100% ng maximum continuous limit
- Panganib (Pula): ang sinukat na temperatura ay lumalampas sa maximum continuous limit
Praktikal na Halimbawa
Given: Standard steel ball bearing na sinukat sa 105 °C sa outer housing.
Max continuous = 120 °C, max short-term = 150 °C
Sinukat na 105 °C = 87.5% ng maximum continuous → Warning zone (80–100%)
Ang actual inner raceway temp ay malamang na 115–125 °C (10–20 °C mas mataas kaysa housing)
Recommendation: Approaching thermal limit. Investigate root cause — possible lubrication degradation, misalignment, or overload.
💡 Tip: Para sa bawat pagtaas ng 15 °C sa itaas ng rated temperature, ang buhay ng bearing ay humigit-kumulang na naghuhati sa kalahati. Ang temperature monitoring ay isa sa mga pinaka-epektibong tool ng predictive maintenance.
Professional portable balancers, vibration analyzers, at condition monitoring systems. Matukoy ang overheating bearings nang maaga gamit ang vibration analysis. Ginagamit sa 50+ countries.
