magnetic thrust force relief for a oil bearing turbomachine

MAGNETIC BEARING OPERATING EXPERIENCE

thrust bearing location inboard or outboard of the radial bearing. Magnetic bearings have a lower specific design load capacity than do hydrodynamic bearings (60 to 70 psi, vs 350 to 500 psi).

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Turboexpanders with pressurized magnetic bearings for off-shore applications (Conference) | OSTI.GOV

31/12/1995 · Furthermore, the thrust bearing system should withstand process fluctuations which are more severe due to high pressure. In this paper, the authors explain their experience of designing a turboexpander-compressor with magnetic bearings for an

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OF ACTIVE MAGNETIC BEARINGS

ic loads the magnetic bearing \\ill control. Magnetic bearings are Figure 3. System Engineering Methodology. RADIAL AND THRUST BEARINGS not as forgiving of gross overloads. It is often difficult to establish the exact load requirements,

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Fundamentals of turboexpander design and operation

Examples include spare seal gas and oil filter elements, control panel electronic components, or magnetic bearing controller-related spares. Active magnetic bearings. An area of significant development in the turboexpander industry is the

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Twelfth International Symposium on Magnetic Bearings 2010 (ISMB 12)

Active Magnetic Bearing for Tubular Linear Induction Motor Applied to Onshore Oil Exploitation 211 Eduardo Alves da Costa, Ivan Eduardo Chabu, Jose Jaime da Cruz Comparison of Different Control Concepts for Bearingless Brushless Motors 223 Franz

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US5355040A – Magnetic bearing back-up – Google Patents

A back-up bearing (50, FIG. 1) is provided for a magnetic journal or thrust bearing by a source of pressurized fluid 52 (such as gas), channels 51 supplying the fluid to the suspension gap 30 between moving bearing armature 25 and stationary

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Bearing assembly having a mechanical component and using attractive magnetic forces – Rozlev Corp., LLC

Magnetic thrust force relief for a foil bearing turbomachine 1979-09-11 Glaser 4062097 Roll having magnetic deflection compensation 1977-12-13 Riihinen 3877761 Electromagnetic bearing means 1975-04-15 Boden et al. 3780668 1973-12-25 Schwärzler

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(PDF) Axial active magnetic bearing design

The magnetic thrust force can be expressed by following equation 17, 18… A new novel six-degree of freedom two-link manipulator using active magnetic bearing: Design, kinematics, and control Article

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“High Vibrations & Component Failure In Turbomachinery, due to Magnetic Currents

High vibrations appeared on Intake end of second stage of Compressor, BCL-407a – Value of 5 mils / 125 microns (shaft vibration as on monitor) Shaft vibration on discharge end was normal (0.4 mils) Inspected bearings and observed rubbing /

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US Patent Application for Permanent Magnet Thrust Bearing Patent Application (Application #20180100543 issued April 12, 2018) – Justia Patents Search

11/10/2016 · Each thrust disc 130 and platter 132 is oriented within the magnetic thrust bearing 128 to produce a repelling magnetic force with an adjacent thrust disc 130 or platter 132. This repulsive force is produced by matching the polarity of the magne

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Development of active magnetic bearings and ferrofluid seals toward oil free sodium pumps – ScienceDirect

1/12/2013 · (iii) Active magnetic thrust bearing: The thrust magnetic bearing actuator consists of two sets of electromagnets positioned on either side of a rotor disc mounted on the shaft. The axial clearance during operation between the rotor disc and the

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US Patent for Rotodynamic machine for the forwarding of a fluid Patent (Patent # 6,043,580 issued March 28, 2000) – Justia Patents Search

Electrical windings (15, 16) produce the required torque and the magnetic bearing force and are arranged together in the stator. The rotor (4a) forms a section of the shaft (4) of the turbomachine (2) and a control apparatus (7) and excites the

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Motors and Generators:Lubrication, Bearings, and Oil Seals | electrical power generation

Never add oil to bearings when the machine is running. In most cases, the safe temperature rise for a bearing is considered to be within 40°C above the room ambient. Small sleeve-bearing motors use either wool packing or fluid wick for

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A High Absolute Thrust Permanent Magnet Linear Actuator for Direct Drive of Ship's Steering Gears: Concept and FEM Analysis

system issues, other challenges concern the innovation of oil-powered on-board actuators. Very high torques analysis for magnetic optimization and high thrust per volume maximization are

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US6469411B2 – Compliant foil fluid film bearing with eddy current damper – Google Patents

The invention relates to means and methods by which a rotor is rotationally journalled relative to a stator in a magnetic field provided concentrically about a longitudinal axis, coincident with the rotor and the stator axis such that an annular

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Turboexpanders with dry gas seals and active magnetic bearings in hydrocarbon processing (Conference) | OSTI.GOV

1/7/1999 · As advances in magnetic bearing technology and understanding occur, the design and performance of the magnetic bearings continues to improve. The purpose of this paper is to describe some characteristics of industrial magnetic bearing supported

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DESIGN OF THE HTR-10 HELIUM CIRCULATOR WITH THE ACTIVE MAGNETIC BEARINGS | Request PDF

Magnetic bearing is one of oil-free bearing and recently it started to be applied to a few turbo refrigerant Thrust magnetic bearing are designed to support 2,000N thrust force by compressor

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Net Axial Force – an overview | ScienceDirect Topics

The thrust bearings on the pinion shaft transmit the net axial load from the aerodynamics and gear axial force through the thrust bearing to the static bearing housing. The advantage of the high-speed thrust bearing is that large axial loads can

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Patents Assigned to Nuovo Pignone Srl – Justia Patents Search

8/4/2013 · Thrust bearing, a turbomachine, and a method of making a bearing rotor disk for an electromagnetic thrust bearing in a turbomachine Patent number: 9926976

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Oil&Gas – PEH:Compressors – PetroWiki

26/4/2017 · Use of magnetic bearings eliminates the need for an auxiliary lube oil system; however, the magnetic bearing control system also requires cooling. The pressure rise in each of the stages of a centrifugal compressor creates an axial thrust force

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Technical Leader Baker Hughes, a GE Company Engineering Bearing Products Baker Hughes, a GE Company Florence, Italy

Where magnetic bearings are not a viable solution due to bearing loads and dimensions, hydrodynamic journal and thrust bearings remain the preferred solution for most oil and gas service turbomachinery applications.

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Gas Foil Bearing Coating Behavior in Environments Relevant to S-CO2 Power System Turbomachinery M.S. Walker, D. D. Fleming, and J. J. Pasch Sandia

The other bearing types (gas foil bearings, magnetic bearings, hydrostatic bearings, and hybrid bearings) are useful primarily for S-CO 2 history with the oil bearings. Radial Bearing Axial (Thrust) Bearing 4 Figure 2. Types of bearings prop

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Mounting for a turbo-machine rotor and its use – Allweiler AG

A force, acting in the opposite direction from the axial force, is generated by axial displacement of the rotor-sided bearing elements of the permanent magnet bearing, in relation to the housing-sided bearing elements, counter to the direction

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Cost and performance design approach for GTHTR300 power conversion system – ScienceDirect

1/12/2003 · Thrust loads in magnetic bearing and auxiliary catch bearing were near or beyond the current design limits in the vertical design. In the case of horizontal turbogenerator arrangement where static and dynamic loads are not jointly concentrated

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What is Thrust? – NASA

13/5/2021 · Thrust is the force which moves an aircraft through the air. Thrust is used to overcome the drag of an airplane, and to overcome the weight of a rocket. Thrust is generated by the engines of the aircraft through some kind of propulsion system .

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Performance Assessment of a Hybrid Magnetic Bearing System for Rotary Centrifugal Blood Pump – Mohawk Innovative Technology, Inc.

The hybrid magnetic bearing system uses permanent magnets to provide passive radial support and electromagnetic coils to maintain rotor axial stability. The magnetic thrust bearing is actively controlled using a simple PID controller with zero-f

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(PDF) On the Control of Single Stage Centrifugal Compressor Surge with Active Magnetic Bearings

This research presents a new method for active surge control in centrifugal compressors with unshrouded impellers using a magnetic thrust bearing to modulate the impeller tip clearance.

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Shimmed three lobe compliant foil gas bearing – Air Products and Chemicals, Inc.

Magnetic thrust force relief for a foil bearing turbomachine 1979-09-11 Glaser 384/105 4133585 Resilient foil journal bearing 1979-01-09 Licht 384/103 4082375 Dual wedge fluid thrust bearing including wave spring 1978-04-04 Fortmann 384/105

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Evaluation of alternate power conversion unit designs for the GT-MHR – ScienceDirect

1/11/2008 · The entire turbomachine (TM) rotor, including the generator, was supported by active magnetic bearings—five radial bearings (two in generator and three in turbocompressor) and one double acting thrust bearing (between generator and turbocompress

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Compressor Rotor – an overview | ScienceDirect Topics

Bearing in mind that the main rotor axial force is larger than the gate one, this effect is more beneficial for the main rotor. Since the radial force R and its axial position z 1 are calculated in advance for every rotation angle θ , calculated

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