What kind of hydraulic oil is used for cranes: comprehensive analysis and purchasing guide
In the field of construction machinery, cranes are heavy equipment, and the stable operation of their hydraulic systems is crucial. The choice of hydraulic oil directly affects the working efficiency and life of the crane. This article will combine the hot topics on the Internet in the past 10 days to provide you with a detailed analysis of the selection standards, common types and precautions of crane hydraulic oil.
1. The core role of crane hydraulic oil
Hydraulic oil assumes the four major functions of energy transmission, lubrication, cooling and rust prevention in cranes. Improper selection may lead to the following problems:
| Question type | Specific performance |
|---|---|
| System efficiency decreases | Slow movements and lack of motivation |
| Part wear | Pump valve is damaged and seal fails |
| Abnormal temperature | Overheating alarm, oil oxidation |
2. Comparison of mainstream hydraulic oil types
According to the international standard ISO 11158 and recommendations from mainstream manufacturers, commonly used hydraulic oils for cranes can be divided into three categories:
| Type | Applicable temperature | Typical viscosity | Brand example |
|---|---|---|---|
| HL mineral oil | -10℃~40℃ | ISO VG 32/46 | Shell Tellus, Mobil DTE |
| HM anti-wear oil | -25℃~50℃ | ISO VG 46/68 | Great Wall L-HM46, Kunlun Tianhong |
| HV low temperature oil | -40℃~60℃ | ISO VG 32/46 | Castrol Hyspin, Total HV |
3. Hot hydraulic oil technologies in 2024
Recent industry discussions have focused on three major technical directions:
1.Bio-based hydraulic oil: Sany Heavy Industry piloted the use of plant-based hydraulic oil, improving environmental protection indicators by 40%
2.Nano Additive Technology: The latest research from the Chinese Academy of Sciences shows that graphene additives can reduce wear rate by 25%
3.Intelligent monitoring system: XCMG launches real-time monitoring platform for hydraulic oil status, with early warning accuracy reaching 92%
4. Practical Guide to Purchasing
| decision factors | specific suggestions |
|---|---|
| climate match | HV series low-temperature oil must be used in northern winter |
| Equipment age | It is recommended to use high viscosity oil (ISO VG68) for old equipment |
| work intensity | Continuous operation requires the selection of antioxidant oils |
| cost control | Equipment with less than 2000 hours can use HL grade base oil |
5. Common misunderstandings and warnings
1.Mix different brands: Recently, a construction site’s system was paralyzed due to mixed use of hydraulic oil, and the repair cost exceeded 120,000 yuan.
2.Ignore oil change intervals: A survey shows that 61% of hydraulic failures are caused by excessive use of oil products.
3.Excessive pursuit of high prices: Laboratory tests found that the performance of some domestically produced oils has reached international standards.
6. Maintenance points
It is recommended to establish a hydraulic oil usage file, including the following data:
| Monitoring items | normal range | Testing cycle |
|---|---|---|
| Moisture content | <0.1% | monthly |
| particulate pollution | NAS level 9 or below | quarterly |
| Acid value changes | Increase <0.3mgKOH/g | every 500 hours |
Conclusion:The correct selection of hydraulic oil can extend the life of the crane hydraulic system by more than 30%. It is recommended that users refer to the equipment manual based on actual working conditions and consult a professional lubrication engineer when necessary. With the improvement of environmental protection requirements, degradable hydraulic oil will become a new trend in the industry in the future.
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