new traction drive pairing with inner spherical rotor for automobile usage depart of mechanical...
Post on 24-Jan-2016
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![Page 1: New Traction Drive Pairing with Inner Spherical Rotor for Automobile Usage Depart of Mechanical Design, Pusan National Univ. South Korea. Researcher: Ilkeun](https://reader036.vdocuments.site/reader036/viewer/2022062500/56649d7b5503460f94a5f68e/html5/thumbnails/1.jpg)
New Traction Drive Pairing withInner Spherical Rotor for Automobile
Usage
Depart of Mechanical Design, Pusan National Univ. South Korea.
Researcher: Ilkeun KuProfessor: Nogill Park
![Page 2: New Traction Drive Pairing with Inner Spherical Rotor for Automobile Usage Depart of Mechanical Design, Pusan National Univ. South Korea. Researcher: Ilkeun](https://reader036.vdocuments.site/reader036/viewer/2022062500/56649d7b5503460f94a5f68e/html5/thumbnails/2.jpg)
Layout
1. Driving / driven rotor
2. Traction ball assembly
3. Pressure device
4. Ratio changer
- Basic components
![Page 3: New Traction Drive Pairing with Inner Spherical Rotor for Automobile Usage Depart of Mechanical Design, Pusan National Univ. South Korea. Researcher: Ilkeun](https://reader036.vdocuments.site/reader036/viewer/2022062500/56649d7b5503460f94a5f68e/html5/thumbnails/3.jpg)
Operation principle
- ISCVT assemnly
![Page 4: New Traction Drive Pairing with Inner Spherical Rotor for Automobile Usage Depart of Mechanical Design, Pusan National Univ. South Korea. Researcher: Ilkeun](https://reader036.vdocuments.site/reader036/viewer/2022062500/56649d7b5503460f94a5f68e/html5/thumbnails/4.jpg)
Operation principle
- Pressure device
1 11
1 1
/
cos tan costhF T r
N
/
tan tant i i
th
F T rF
![Page 5: New Traction Drive Pairing with Inner Spherical Rotor for Automobile Usage Depart of Mechanical Design, Pusan National Univ. South Korea. Researcher: Ilkeun](https://reader036.vdocuments.site/reader036/viewer/2022062500/56649d7b5503460f94a5f68e/html5/thumbnails/5.jpg)
Operation principle
- Traction ball assembly components
1. One pair of countor rotor
2. Two bearings
3. Countor rotor shaft
4. Countor rotor housing
5. Connector between CRA and RC
![Page 6: New Traction Drive Pairing with Inner Spherical Rotor for Automobile Usage Depart of Mechanical Design, Pusan National Univ. South Korea. Researcher: Ilkeun](https://reader036.vdocuments.site/reader036/viewer/2022062500/56649d7b5503460f94a5f68e/html5/thumbnails/6.jpg)
Operation principle
- Ratio changer and speed ratio
2 4
1 3
h h
h h
![Page 7: New Traction Drive Pairing with Inner Spherical Rotor for Automobile Usage Depart of Mechanical Design, Pusan National Univ. South Korea. Researcher: Ilkeun](https://reader036.vdocuments.site/reader036/viewer/2022062500/56649d7b5503460f94a5f68e/html5/thumbnails/7.jpg)
Numerical investigation
▪ Max. power 110 kW / 6,000 RPM
▪ Max. torque 194 N·m / 4,500 RPM
▪ Overall speed ratio 0.09~0.37
▪ Driving / driven rotor diameter range
100 ~ 200 mm
▪ Radius of traction ball range 10~50 mm
▪ height of traction ball pivot range 50 ~ 100 mm
▪ Preloading thrust forces range 0.1 ~ 500 N
▪ Cam lead angle range 0.1 ~ 50°
- Design specification for the passenger car
![Page 8: New Traction Drive Pairing with Inner Spherical Rotor for Automobile Usage Depart of Mechanical Design, Pusan National Univ. South Korea. Researcher: Ilkeun](https://reader036.vdocuments.site/reader036/viewer/2022062500/56649d7b5503460f94a5f68e/html5/thumbnails/8.jpg)
Numerical investigation
Kinematic analysis- Calculate traction ball angle range
Kinetic analysis- Direction vector declaration- Torque equilibrium Equations- Hertzian contact theory- Life time- Transmission efficiency
Simulation results
Simulation start
Input design parameter
End program
- Flow chart
![Page 9: New Traction Drive Pairing with Inner Spherical Rotor for Automobile Usage Depart of Mechanical Design, Pusan National Univ. South Korea. Researcher: Ilkeun](https://reader036.vdocuments.site/reader036/viewer/2022062500/56649d7b5503460f94a5f68e/html5/thumbnails/9.jpg)
Numerical investigation
Optimal design variables
▪ Radius of driving / driven rotor 125 mm
▪ Radius of traction ball 43.3 mm
▪ Height of traction ball pivot 52 mm
▪ Cam lead angle 36°
▪ Preloading thrust force 220 N
Transmission performances
▪ Transmission efficiency 93 %
▪ Ratio changer work 263 joul
▪ Life time 10,800 hour
▪ Maximum shear stress 552 MPa
▪ Gradeability 20°
- Simulation results
![Page 10: New Traction Drive Pairing with Inner Spherical Rotor for Automobile Usage Depart of Mechanical Design, Pusan National Univ. South Korea. Researcher: Ilkeun](https://reader036.vdocuments.site/reader036/viewer/2022062500/56649d7b5503460f94a5f68e/html5/thumbnails/10.jpg)
Stress analysis
-Driving rotor, traction ball,
- Frame and bearing housing
![Page 11: New Traction Drive Pairing with Inner Spherical Rotor for Automobile Usage Depart of Mechanical Design, Pusan National Univ. South Korea. Researcher: Ilkeun](https://reader036.vdocuments.site/reader036/viewer/2022062500/56649d7b5503460f94a5f68e/html5/thumbnails/11.jpg)
Performance analysis
Transmission efficiency (%)
2 2
1 1
T
T
![Page 12: New Traction Drive Pairing with Inner Spherical Rotor for Automobile Usage Depart of Mechanical Design, Pusan National Univ. South Korea. Researcher: Ilkeun](https://reader036.vdocuments.site/reader036/viewer/2022062500/56649d7b5503460f94a5f68e/html5/thumbnails/12.jpg)
Performance analysis
Maximum shear stress (MPa)
Driving rotor Driven rotor
1sd
sd
VpV
<<<<<<<<<<<<<<<<<<<<<<<<<<<<
<<<<<<<<<<<<<< ( , )rp C 1
sd
r
VC
V
<<<<<<<<<<<<<<
<<<<<<<<<<<<<<
![Page 13: New Traction Drive Pairing with Inner Spherical Rotor for Automobile Usage Depart of Mechanical Design, Pusan National Univ. South Korea. Researcher: Ilkeun](https://reader036.vdocuments.site/reader036/viewer/2022062500/56649d7b5503460f94a5f68e/html5/thumbnails/13.jpg)
Performance analysis
Life time (Hour)
Driving rotor Driven rotor
![Page 14: New Traction Drive Pairing with Inner Spherical Rotor for Automobile Usage Depart of Mechanical Design, Pusan National Univ. South Korea. Researcher: Ilkeun](https://reader036.vdocuments.site/reader036/viewer/2022062500/56649d7b5503460f94a5f68e/html5/thumbnails/14.jpg)
Performance analysis
Ratio changer work (Joul)
max 1 2 max min( ) ( )rcW N N r
![Page 15: New Traction Drive Pairing with Inner Spherical Rotor for Automobile Usage Depart of Mechanical Design, Pusan National Univ. South Korea. Researcher: Ilkeun](https://reader036.vdocuments.site/reader036/viewer/2022062500/56649d7b5503460f94a5f68e/html5/thumbnails/15.jpg)
Performance analysis
Gradeability (Degree)
21sin
2thrust air area
tire
F C VC
Wg Wg
![Page 16: New Traction Drive Pairing with Inner Spherical Rotor for Automobile Usage Depart of Mechanical Design, Pusan National Univ. South Korea. Researcher: Ilkeun](https://reader036.vdocuments.site/reader036/viewer/2022062500/56649d7b5503460f94a5f68e/html5/thumbnails/16.jpg)
Capacity expantion
Transmission efficiency (%)
![Page 17: New Traction Drive Pairing with Inner Spherical Rotor for Automobile Usage Depart of Mechanical Design, Pusan National Univ. South Korea. Researcher: Ilkeun](https://reader036.vdocuments.site/reader036/viewer/2022062500/56649d7b5503460f94a5f68e/html5/thumbnails/17.jpg)
Capacity expansion
Maximum shear stress (MPa)
![Page 18: New Traction Drive Pairing with Inner Spherical Rotor for Automobile Usage Depart of Mechanical Design, Pusan National Univ. South Korea. Researcher: Ilkeun](https://reader036.vdocuments.site/reader036/viewer/2022062500/56649d7b5503460f94a5f68e/html5/thumbnails/18.jpg)
Capacity expansion
Life time (Hour)
![Page 19: New Traction Drive Pairing with Inner Spherical Rotor for Automobile Usage Depart of Mechanical Design, Pusan National Univ. South Korea. Researcher: Ilkeun](https://reader036.vdocuments.site/reader036/viewer/2022062500/56649d7b5503460f94a5f68e/html5/thumbnails/19.jpg)
Comparison with toroidal CVT
Performance analysis
![Page 20: New Traction Drive Pairing with Inner Spherical Rotor for Automobile Usage Depart of Mechanical Design, Pusan National Univ. South Korea. Researcher: Ilkeun](https://reader036.vdocuments.site/reader036/viewer/2022062500/56649d7b5503460f94a5f68e/html5/thumbnails/20.jpg)
Comparison with toroidal CVT
Performance analysis
![Page 21: New Traction Drive Pairing with Inner Spherical Rotor for Automobile Usage Depart of Mechanical Design, Pusan National Univ. South Korea. Researcher: Ilkeun](https://reader036.vdocuments.site/reader036/viewer/2022062500/56649d7b5503460f94a5f68e/html5/thumbnails/21.jpg)
Comparison with toroidal CVT
Performance
![Page 22: New Traction Drive Pairing with Inner Spherical Rotor for Automobile Usage Depart of Mechanical Design, Pusan National Univ. South Korea. Researcher: Ilkeun](https://reader036.vdocuments.site/reader036/viewer/2022062500/56649d7b5503460f94a5f68e/html5/thumbnails/22.jpg)
Comparison with toroidal CVT
Power density
[ / ]Power
PowerDensity kWVolume
2
11019.3 /
220150
4
ISCVT kW
2
1108.6 /
260240
4
TCVT kW
![Page 23: New Traction Drive Pairing with Inner Spherical Rotor for Automobile Usage Depart of Mechanical Design, Pusan National Univ. South Korea. Researcher: Ilkeun](https://reader036.vdocuments.site/reader036/viewer/2022062500/56649d7b5503460f94a5f68e/html5/thumbnails/23.jpg)
Apply to the automobile
![Page 24: New Traction Drive Pairing with Inner Spherical Rotor for Automobile Usage Depart of Mechanical Design, Pusan National Univ. South Korea. Researcher: Ilkeun](https://reader036.vdocuments.site/reader036/viewer/2022062500/56649d7b5503460f94a5f68e/html5/thumbnails/24.jpg)
Conclusion
Introduce a new traction drive ISCVT.
Perform kinematic / kinetic analysis and derive the speed ratio.
Numerical investigation and conceptual design on the basis of simulation results. ▪ CAD and stress analysis
Apply to the 110 kW automobile and evaluate its performances. ▪ Transimssion efficiency, ▪ Maximum shear stress ▪ Life time ▪ Gradeability ▪ Ratio changer work
Comparison with toroidal CVT and the results show the better performances.