A high-speed shaft supported by magnetic bearings applied to energy systems

Rosa, Fabiano Camargo; Lima, Fábio; Fumagalli, Marco Antonio

doi:10.1007/s40430-016-0650-3

Cited by 6 publications

(3 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hydrodynamic pressure depends on several factors, such as the system rotation, the bearing clearance,bushingdiameterandlength,andappliedload.Asthedampingandstiffnessofabearing arehighlysensitivetothegap(ho),thisparameterisextremelyimportantfortheassemblydynamics control.BearingclearancehoisdefinedbyTable3,whereDistheshaftdiameter.Consideringthat theshaftdiameterwherethebearingswillbeallocatedisD=30mm (Rosa,Lima,&Fumagalli, 2017),thebearingclearancevaluewasho=0.03mm.Theotherconstructivemeasuresofthebushing bearingwereobtainedaccordingtoDIN1850-5standard (Kiehl,2001).Bushingbearingmodeling wasperformedbythepresentedmethodologyfromtheavailabledimensionalparameters.Figure2 showsthehydrodynamicbearingfinaldesign.…”

Section: Hydrodynamic Bearing Modellingmentioning

confidence: 99%

Structural Design and Stress Analysis of a High-Speed Turbogenerator Assembly Supported by Hydrodynamic Bearings

Bento

Filho²,

Fumagalli³

2020

International Journal of Manufacturing, Materials, and Mechanical Engineering

Self Cite

View full text Add to dashboard Cite

Turbine and bushing bearing are the most critical components of high-speed machines. This article describes the design of a high-speed turbine supported by hydrodynamic bearings. The mathematical dimensioning and the FEM analysis are presented to validate the mechanical strength of the turbine and the bushing bearing models. Fatigue life and factor of safety were also determined. The simulations showed that the maximum Von Mises stress values obtained are associated to the centrifugal force generated by the system rotational movement. The results variation was mainly due to the properties of the materials proposed. For the turbine, 7075-T6 aluminum alloy and SAE 4340 steel obtained satisfactory behavior under a constant operating speed of 30,000 RPM. For the hydrodynamic bearing, the TM23 bronze alloy exhibited excellent results, without fracture, and low mechanical deformation. The models exhibited a great potential employment in several applications, such as biogas systems to generate electrical energy, and educational test bench for thermodynamic and tribological simulations.

show abstract

Section: Hydrodynamic Bearing Modellingmentioning

confidence: 99%

Structural Design and Stress Analysis of a High-Speed Turbogenerator Assembly Supported by Hydrodynamic Bearings

Bento

Filho²,

Fumagalli³

2020

International Journal of Manufacturing, Materials, and Mechanical Engineering

Self Cite

View full text Add to dashboard Cite

show abstract

“…Bearing clearance ho is defined by Table 3, where D is the shaft diameter. Considering that the shaft diameter where the bearings will be allocated is D = 30 mm [5], the bearing clearance value was ho = 0.03 mm. The other constructive measures of the bushing bearing were obtained according to DIN 1850-5 standard [18].…”

Section: Hydrodynamic Bearing Modelingmentioning

confidence: 99%

“…This generated energy is transferred to an shaft, and it can be used efficiently for the pumps drive, compressors, turboblowers, propulsion, electric generators, among other several applications. Such efficiency is justified since this type of machine can operate at frequencies an order of magnitude above line frequency, which allows to reduce the size of the machines in the same power rating [5]. Currently, great percentage of the world's energy is produced by the turbogenerators.…”

Section: Introductionmentioning

confidence: 99%

Structural design and stress analysis of a high-speed turbogenerator assembly supported by hydrodynamic bearings

Bento

Filho²,

Fumagalli³

2019

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

Turbine and bushing bearing are the most critical components of high-speed machines. This paper describes the design of a high-speed turbine supported by hydrodynamic bearings. The mathematical dimensioning and the FEM analysis are presented to validate the mechanical strength of the turbine and the bushing bearing models. Fatigue life and factor of safety are also determined. The simulations show that the maximum von Mises stress values obtained are associated with the centrifugal force generated by the system rotational movement. The results variation is mainly due to the properties of the materials proposed. For the turbine, 7075-T6 aluminum alloy and SAE 4340 steel obtained satisfactory behavior under a constant operating speed of 30,000 RPM. For the hydrodynamic bearing, the TM23 bronze alloy exhibited excellent results, without fracture, and low mechanical deformation. The models exhibited a great potential employment in several applications, such as biogas systems to generate electrical energy, and educational test bench for thermodynamic and tribological simulations. Keywords High-speed machines • Structural design • Steam turbine • Hydrodynamic bearings • FEM analysis List of symbols µ d Coefficient of dynamic friction Aα Turbine full-arc C y Blades theoretical velocity D m Mean blade diameter F f Dynamic friction force F N Normal force h e Input enthalpy h s Output enthalpy ṁ Mass flow ƞ i Internal efficiency ƞ m Mechanical efficiency R Mean radius of blades length u Tangential velocity v m Mean velocity coefficient Ẇ Power Z Number of blades Z min Minimum number of blades γ Specific internal work ε Coefficient of laminar steam flow ω Angular velocity

show abstract

Simulation Training Remote Control System of Industrial Robot Based on Deep Learning

Zhao

2020

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering

View full text Add to dashboard Cite

In order to improve the remote control performance of industrial robot simulation training, deep learning algorithm is used to optimize the design of traditional remote control system. On the basis of traditional remote control system, the configuration of hardware system is modified, and the database of control system is established. With the support of hardware system and database, the remote control of two training items of industrial robot simulation mobile training and simulation picking training are realized respectively. Through the system test experiment, the conclusion is drawn: compared with the traditional industrial robot remote control system, the control function of the design control system is improved, and the system can save about 12.5 s response time in the control process.

show abstract

A high-speed shaft supported by magnetic bearings applied to energy systems

Abstract: performance of the generator side. On the grid side, the voltage-oriented control (VOC) is applied to guarantee the high quality of the current injected into the grid.

Cited by 6 publications

References 19 publications

Structural Design and Stress Analysis of a High-Speed Turbogenerator Assembly Supported by Hydrodynamic Bearings

Structural Design and Stress Analysis of a High-Speed Turbogenerator Assembly Supported by Hydrodynamic Bearings

Structural design and stress analysis of a high-speed turbogenerator assembly supported by hydrodynamic bearings

Simulation Training Remote Control System of Industrial Robot Based on Deep Learning

Contact Info

Product

Resources

About