(1) Environmental Conditions: Based on ambient temperature and environmental exposure;
(2) Operational Conditions: Includes oil pump type, operating pressure, temperature, speed, compatibility with oil and metal materials, seal and coating adaptability, system cycle, and working characteristics;
(3) Properties of Hydraulic Oil: Covers physical and chemical properties, performance, and functional characteristics of the oil;
(4) Economic Factors: Consider the cost and service life of the hydraulic oil.
After selecting the appropriate hydraulic oil, proper management and maintenance during use are crucial. Pay attention to the following key points:
1. Prevent Contamination: The main danger of contaminants is equipment corrosion, clogged filters and orifices, accelerated oil aging, and component damage.
2. Avoid Air Ingress: If air enters the system, it can cause cavitation, noise, and premature oil degradation, which negatively affects performance.
3. Prevent Moisture Ingress: The presence of cooling water or steam can corrode metal parts, accelerate oil deterioration, and reduce lubricity.
4. Control Operating Temperature: For mineral-based hydraulic oils, continuous operation is typically recommended at 50–65°C, with a maximum of 120–140°C. As temperature rises, oxidation increases, leading to acid formation that can corrode components.
1. Basis for Selecting Hydraulic Oil for Construction Machinery
Different hydraulic components have specific minimum requirements for the hydraulic oil used. When choosing oil, it's important to consider the type of hydraulic components and the compatibility of seals, coatings, and materials with the oil. This ensures proper lubrication and helps components reach their intended lifespan and performance standards.
The hydraulic pump is one of the most sensitive components in terms of oil viscosity and viscosity-temperature characteristics. Therefore, the oil requirements in the system often serve as a primary basis for selection (except in systems with servo valves).
2. System Operating Conditions
If the actuator speed, system pressure, and mechanism accuracy requirements are higher, the hydraulic oil must offer better wear resistance and load-carrying capacity.
Considering the possible operating temperature, continuous operation time, and hygiene conditions of the environment, it’s important to pay attention to oil viscosity, high-temperature performance, and thermal stability when selecting the oil to minimize sludge formation and deposition.
3. Tank Size
Smaller oil tanks require higher levels of oil oxidation stability, extreme pressure wear resistance, air release, and filtration performance.
4. Ambient Temperature
For construction machinery operating in underground, wet, indoor, outdoor, cold, or areas with significant temperature fluctuations, special attention should be given to the suitability of hydraulic oil. If there is no open flame nearby and the working temperature remains below 60°C, standard hydraulic oil may be used. However, if the equipment needs to start at very low temperatures, low-cold hydraulic oil is recommended.
5. Final Selection
After initial selection, it’s essential to check the oil’s source, viscosity, quality, usage characteristics, application scope, and compatibility with system and component materials to ensure all specifications are met.
6. Economic Considerations
Cost and service life of the hydraulic oil, along with system maintenance cycles and safety, should be considered. It’s advisable to choose brands that offer good economic value and reliability.
Stay Alert and Well-Informed
Tag: Key Points for Selecting Hydraulic Oil in Construction Machinery
Previous: Hardware Knowledge: Things to Note When Changing Cutting Fluid Next: Daily Maintenance Details of CMM
LED emergency light have been divided into two heads emergency lights , bulkhead emergency lights , emergency ceiling lights and emergency bulbs . The role of emergency lights is an emergency state evacuating people , generally used in public places . All emergency lights use LED source , its advantages are high brightness , low power consumption , LED lighting effect than the traditional light source energy saving nearly 80% .
Led Emergency Light,,Recessed Emergency Light,Automatic Emergency Light
Jiangmen City Pengjiang District Qihui Lighting Electrical Appliances Co., Ltd , https://www.qihuilights.com