What does hydraulic oil do?
Hydraulic oil is an indispensable working medium in the hydraulic system, and its performance directly affects the efficiency and life of the hydraulic system. This article will combine the hot topics and hot content on the Internet in the past 10 days to analyze the functions, types and selection points of hydraulic oil in detail, and attach structured data for reference.
1. The core role of hydraulic oil
Hydraulic oil performs the following key functions in hydraulic systems:
| effect | illustrate |
|---|---|
| energy transfer | Transmit power through incompressibility to drive actuators (such as cylinders and motors) to work |
| Lubrication protection | Reduce friction and wear between metal parts and extend the life of pumps, valves and other components |
| Heat dissipation cooling | Absorbs system heat and dissipates it through the tank or cooler |
| Sealed and leak-proof | Fill component gaps and improve sealing performance |
| Anti-corrosion and anti-rust | Additives neutralize acids and protect metal surfaces |
2. Comparison of recently popular hydraulic oil types
According to the popularity of industry discussions, the following three hydraulic oils have attracted much attention:
| type | Features | Applicable scenarios | Popular Brands (2023) |
|---|---|---|---|
| Mineral oil type | Good economy, average antioxidant properties | General industrial equipment | Shell Tellus, Mobil DTE |
| Synthetic hydrocarbon type | Excellent low temperature fluidity and long service life | Polar construction machinery | Castrol Hyspin, BP Energol |
| Biodegradable | Environmentally friendly, non-toxic, higher cost | Agricultural and forestry machinery, marine equipment | Flowserve Renolin, Total Ecofluid |
3. Hot issues in hydraulic oil selection
According to the discussion data of technology forums in the past 10 days, the three major issues that users are most concerned about are:
1.Misunderstandings in viscosity selection: 60% of the consulting cases involve the problem of viscosity drop under high temperature environment. Experts recommend referring to the ISO VG grade, recommending VG46/VG68 in summer and VG32 in winter.
2.Oil change interval controversy: New research shows that using a three-stage filtration system can extend the oil change cycle by 30%-50%, but it requires regular detection of acid value (≤1.0mgKOH/g) and moisture (≤0.1%).
3.Mixed risk warning: A fault analysis of a construction machinery showed that mixing mineral oil and ester oil can cause additive precipitation and cause valve core to become stuck.
4. Latest industry trends
1.Carbon Neutrality Trend: The European Union plans to upgrade the biodegradation standard for hydraulic oil from CEC-L-33-A-93 to OECD 301B, and many companies are accelerating the development of vegetable oil-based products.
2.Intelligent monitoring technology: A car company released a hydraulic tank with built-in sensors that can monitor viscosity, particulate matter (NAS level 8 alarm) and dielectric constant changes in real time.
3.Breakthrough in recycling technology: A Japanese research institute developed a molecular sieve regeneration process that can restore the performance of waste hydraulic oil to 92% and reduce costs by 40%.
5. Maintenance points
| project | standard | Detection tools |
|---|---|---|
| pollution degree | ISO 4406 18/16/13 | particle counter |
| Degree of oxidation | Acid value increase ≤0.5 | FTIR spectrometer |
| Moisture content | ≤500ppm | Karl Fischer moisture meter |
Conclusion: Hydraulic oil is like the "blood" of the hydraulic system. Correct selection and maintenance can not only improve equipment efficiency, but also significantly reduce the failure rate. It is recommended that users choose appropriate oil products according to working conditions and establish a regular testing mechanism.
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