Circumferential Groove in Cylinder of Piston Machines
- Summary
- Researchers at Purdue University have developed a novel approach to prevent metal-to-metal contact in pistons in the event of insufficient hydrodynamic load carrying ability of the fluid film between the piston and cylinder through the utilization of hydrostatically balanced areas. Subsequently, this technology equips the design of swash-plate type machines for high pressure, utilizing low-viscosity fluids, like water. The technology helps increase the load-carrying capacity of the fluid film between the piston and cylinder due to additional hydrostatic bearing capacity, which helps prevent metal-to-metal contact.
- Technology Benefits
- Prevents metal-to-metal contact between the piston and cylinderAllows swash plate type machines to utilize low viscosity fluids like water
- Technology Application
- Piston-cylinder boresAxial piston pumps
- Detailed Technology Description
- Monika IvantysynovaMaha Fluid Power LabPurdue Mechanical EngineeringMonika IvantysynovaPurdue Agricultural and Biological Engineering
- Countries
- United States
- Application No.
- None
- *Abstract
-
- *Background
- In current swash-plate type axial-piston machines, the pistons move axially in a dynamically changing tilted position, traveling periodically between the inner and outer dead center of the piston while the unit's machine shaft rotates. The fluid film between the piston and its surrounding cylinder bore or bushing is on the order of microns thick, and currently, inefficiencies exist in these machines due to metal-to-metal contact in pistons that result from insufficient fluid film.
- *IP Issue Date
- None
- *IP Type
- Provisional
- *Stage of Development
- Concept Developed
- *Web Links
- Purdue Office of Technology CommercializationPurdueInnovation and EntrepreneurshipMonika IvantysynovaMaha Fluid Power LabPurdue Mechanical EngineeringMonika IvantysynovaPurdue Agricultural and Biological Engineering
- Country/Region
- USA
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