ºÝºÝߣ

ºÝºÝߣShare a Scribd company logo

Planetary wheel (shweel) efficiency

•Download as PPTX, PDF•
•
Zoltan Kemeny
Zoltan Kemeny

The document describes a new wheel design called the planetary wheel or "shweel" that replaces air-filled tires with steel-armored shock spokes for improved safety, comfort and efficiency. It analyzes the shweel's higher rolling resistance ratios, shock capacities, and potential efficiencies compared to traditional tires, finding that shweels with higher compression ratios could achieve up to 4% lower rolling resistance and 30% less drivetrain wear while providing more impact resistance than tires. Contact information is provided for questions about the shweel technology.

1 of 11
Downloaded 10 times
Airless Armored Stealth Planetary Wheel Efficiency The planetary wheel is also called shweel (shock-spoke wheel). Copyright ©, 2014 LLC, 2013. Pat. Pend. All rights reserved.
Shock Crown Configuration The shock spokes are tangential to the hub.
The planetary wheel concept Retain air in steel, not in rubber. Thus boost safety, comfort and efficiency.
Forced eccentricity
As a flex torque coupler Foam Filled Very large cushioned twist capacity. It works against slippage and wear. It reduces drivetrain maintenances.
Planetary wheel (shweel) efficiency
Rolling resistance The rolling resistance expressed in road slope angle term Ï‘ is the steepest slope on which free rolling is about to start. Higher compression ratio shocks (CR > 1:1) are more efficient.
Hardening characteristic CR = 4:1 Stiffness CR=1:4 Force CR=1:2 CR = 1:1 CR=1:1 High compression (CR) ratio design reduces: • rolling resistance 2-4x and • drive train wear by 15-30%
Efficiency Efficiency: η = 1- ϑ Power-Losses/Rolling-Resistances: CR=1:2 Shweels CR=1:1 ε = 1/18 ε = 1/12 ε = 1/8 ε = 1/6 ϑ = 1.8-1.9% ϑ = 2.7-2.9% ϑ = 3.9-4.5% ϑ = 5.1-6.4% Tires ε = 1/18 ε = 1/27 ε = 1/40 ε = 1/60 ϑ = 3.5-3.7% ϑ = 2.4-2.4% ϑ = 1.6-1.6% ϑ = 1.1-1.1% ε = 1/18 ε = 1/27 ε = 1/40 ε = 1/60 η = 96% η = 98% η = 98% η = 99% Efficiencies: Shweels ε = 1/18 ε = 1/12 ε = 1/8 ε = 1/6 η = 98% η = 97% η = 95% η = 93% Compare: Electric motors: η = 79-92% Tires Petrol-Diesel engines: η = 20-40%.
Comparison At the same tire-deflections or shock-strokes, an inflated tire has at least twice as much hysteretic losses than a shweel. For more comfort, stability and impact resistance or attenuation however, shweels have larger stroke capacities. Shweels thus may need to pay for extra comfort by a few percent more power. Shweels of higher compression ratio shocks are more efficient. A linear shock (CR=1:1) is the same efficient as an inflated tire.
Call Dr. Kemeny 888-588-0999 or email to 2014LLC@cox.net Bullet-proof Foam-filled Contact

More Related Content

Planetary wheel (shweel) efficiency

  • 1. Airless Armored Stealth Planetary Wheel Efficiency The planetary wheel is also called shweel (shock-spoke wheel). Copyright ©, 2014 LLC, 2013. Pat. Pend. All rights reserved.
  • 2. Shock Crown Configuration The shock spokes are tangential to the hub.
  • 3. The planetary wheel concept Retain air in steel, not in rubber. Thus boost safety, comfort and efficiency.
  • 5. As a flex torque coupler Foam Filled Very large cushioned twist capacity. It works against slippage and wear. It reduces drivetrain maintenances.
  • 7. Rolling resistance The rolling resistance expressed in road slope angle term Ï‘ is the steepest slope on which free rolling is about to start. Higher compression ratio shocks (CR > 1:1) are more efficient.
  • 8. Hardening characteristic CR = 4:1 Stiffness CR=1:4 Force CR=1:2 CR = 1:1 CR=1:1 High compression (CR) ratio design reduces: • rolling resistance 2-4x and • drive train wear by 15-30%
  • 9. Efficiency Efficiency: η = 1- Ï‘ Power-Losses/Rolling-Resistances: CR=1:2 Shweels CR=1:1 ε = 1/18 ε = 1/12 ε = 1/8 ε = 1/6 Ï‘ = 1.8-1.9% Ï‘ = 2.7-2.9% Ï‘ = 3.9-4.5% Ï‘ = 5.1-6.4% Tires ε = 1/18 ε = 1/27 ε = 1/40 ε = 1/60 Ï‘ = 3.5-3.7% Ï‘ = 2.4-2.4% Ï‘ = 1.6-1.6% Ï‘ = 1.1-1.1% ε = 1/18 ε = 1/27 ε = 1/40 ε = 1/60 η = 96% η = 98% η = 98% η = 99% Efficiencies: Shweels ε = 1/18 ε = 1/12 ε = 1/8 ε = 1/6 η = 98% η = 97% η = 95% η = 93% Compare: Electric motors: η = 79-92% Tires Petrol-Diesel engines: η = 20-40%.
  • 10. Comparison At the same tire-deflections or shock-strokes, an inflated tire has at least twice as much hysteretic losses than a shweel. For more comfort, stability and impact resistance or attenuation however, shweels have larger stroke capacities. Shweels thus may need to pay for extra comfort by a few percent more power. Shweels of higher compression ratio shocks are more efficient. A linear shock (CR=1:1) is the same efficient as an inflated tire.
  • 11. Call Dr. Kemeny 888-588-0999 or email to 2014LLC@cox.net Bullet-proof Foam-filled Contact