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Requirements for the use of hydraulic oil by the breaker
Release time:
Jul 04,2022
The hydraulic oil with the same viscosity label is also very different. Visco-temperature refers to the change of oil viscosity with temperature rise and fall, usually expressed by viscosity index (VI). The larger the viscosity index is, the viscosity of the working oil will also change with the temperature change, and the leakage in the system will not be too large. The operating conditions of the breaker are generally harsh. During the entire operation period, the system oil temperature changes with the load and ambient temperature, so the viscosity index should be ≥90.
Good viscosity-temperature characteristics help reduce cold-start problems. The viscosity index has a great relationship with the grade of the base oil. Some base oils have high viscosity index when no additives are used. Adding a viscosity index improver can improve the viscosity and temperature. properties, but viscosity index improvers may fail under high shear conditions, as the molecules are sheared off.
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Jul 04,2022
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