This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Development of a High Performance Biodegradable Hydraulic Oil for Construction Equipment
Annotation ability available
Sector:
Language:
English
Abstract
We have found that most commercially available biodegradable hydraulic oils show low static friction coefficients not depending on the kinds of wet friction materials. Since hydraulic motors of a hydraulic excavator contain wet parking brakes, the most commercially available biodegradable hydraulic oils can not provide enough brake torque capacity to park safely. Furthermore, all kinds of commercially available biodegradable hydraulic oils do not have adequate oil performance for a hydraulic system of construction eq ipment. Thus we have developed a n high performance biodegradable hydraulic oil. To obtain a high static friction coefficient and compatibility with elastomers, a new synthetic ester base fluid has been developed. To improve oxidation stability and to attain compatibility with mineral oil based hydraulic oils,. an additive formulation has also been developed. After evaluating friction characteristics and oxidation stability, we selected the best candidate oil and conducted a high pressure axial piston pump bench test. Furthermore, we confirmed biodegradability and toxicity of this candidate oil.
Recommended Content
Technical Paper | Fluoroelastomer Resistant to Automotive Lubricants |
Aerospace Standard | Performance Testing of Lubricant Filter Elements Utilized in Aircraft Power and Propulsion Lubrication Systems |
Ground Vehicle Standard | Hydraulic Cylinder Leakage Test |
Authors
Topic
Citation
Konishi, A., Ohkawa, S., Nanba, M., Nakamoto, N. et al., "Development of a High Performance Biodegradable Hydraulic Oil for Construction Equipment," SAE Technical Paper 971632, 1997, https://doi.org/10.4271/971632.Also In
References
- 1994
- 1994
- Ohkawa S. “Present and Future Lubricants for Construction Machine” Fuels & Lubes Asia Conference Proceeding 1995
- Ohkawa S. Konishi A. et al “Oxidation and Corrosion Characteristics of Vegetable-Base Biodegradable Hydraulic Oil” SAE 951038 1995
- Ohkawa S. et al “Evaluation Method of Friction Characteristics on Engine Oil” Proceeding of Japan Society of Lubrication Engineers B11 1979 113 116
- van der Waal G. “The Relationship Between the Chemical Structure of Ester Base Fluids and their influence on Elastomer Seals, and Wear Characteristics” Journal of Synthetic Lubrication 1 1994
- Critchley Stuart W. et al “Synthetic Lubricants - Selection of Ester Types for Different Temperature Environments” Proceedings Industrial Lubrication Symposium London 1965
- “Testing Methods for Oxidation Stability of Lubricants”
- Eguchl R. Ohtake Y. Ohkawa S. Iwamura M. Konishi A. “Compatibility of Hydraulic Seal Elastomers with Biodegradable Oils” SAE 960210 1996
- “Biodegradability of Two-Stroke Cycle Outboard Engine Oils in Water” 1993
- “Fish Acute Toxicity Test”
- “Activated Sludge, Respiration inhibition Test”