An induction superconducting magnetic levitation load shedding device for a vertical shaft hydroelectric generator
A technology of hydro-generator and load-reducing device, which is applied to holding devices using magnetic attraction or thrust, hydroelectric power generation, engine components, etc., can solve the problems of friction and mechanical firmness aging, large thrust bearing load, operation accidents, etc. , to achieve the effect of reducing the magnetic saturation limit, the force is stable, and the vibration damage is reduced
Active Publication Date: 2019-06-14
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
This device can solve the problems of the existing load-bearing device-thrust bearing of the vertical-shaft hydro-generator, such as heavy load, friction and aging of mechanical firmness, which lead to operation accidents and difficult maintenance.
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[0036] The induction-type superconducting magnetic levitation load reduction device for vertical shaft hydroelectric generators of the present invention is designed to be composed of two parts: a stator and a rotor. It adopts a combined structure of a superconducting winding 3 and a non-magnetic body, and utilizes the principle of electromagnetic induction. The non-contact electromagnetic repulsion is generated between the stator and the rotor to realize the suspension function.
[0037] The primary stator part of the device is made of superconducting wire MgB2 wound on the alloy core 2, fixed together with the back iron 7, and fixed on the external support mechanism as a whole. The wire adopts MgB2 with superconducting properties. The wire has good bending properties and a working magnetic field up to 3T, which can increase the energy storage density of the air gap 8 to obtain greater force density. The non-magnetic alloy core 2 is mainly used to support the wire to form a ma...
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The invention discloses an induction-type superconduction magnetic suspension deloading device for a vertical-shaft water wheel generator. The induction-type superconduction magnetic suspension deloading device comprises a stator and a rotor, wherein the rotor is arranged above the stator, the stator is fixedly arranged and is arranged around a large shaft of a water turbine, a gap is maintained between the stator and the water turbine, the rotor is fixedly arranged on the large shaft of the water turbine, the stator comprises back iron and at least one suspension force unit, the at least onesuspension force unit is arranged on an upper side surface of the back iron, the suspension force unit comprises a plurality of superconduction winding pairs, the plurality of superconduction windingpairs are symmetrically arranged by taking the large shaft of the water turbine as a center, each superconduction winding pair comprises two superconduction windings, the two superconduction windingsare arranged adjacent to each other along a radial direction of the back iron, and a working air gap exists between the suspension force unit and the rotor. The induction-type superconduction magneticsuspension deloading device is large in volume energy, is stable in stress and small in stress fluctuation, and meanwhile, a bearing load is greatly reduced.
Description
technical field [0001] The invention belongs to the technical design of hydraulic generator system and the field of magnetic levitation, and relates to an induction type magnetic levitation device for reducing the load of the thrust bearing of a vertical shaft hydraulic generator. Background technique [0002] At present, my country's power industry has entered a period of prosperity and development. This period is developing towards a large-scale power grid and generating units, and has the characteristics of high informatization and high technology. In the field of hydropower generation, my country has built many large-scale hydropower units with a single-unit capacity of 700MW, and has the ability to independently research and develop them. A hydroelectric power generation device with a unit capacity of 1000MW or above can integrate and fully resource and improve economic benefits, which is very suitable for the development status of my country's hydropower generation. "m...
Claims
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IPC IPC(8): H02N15/00F03B11/06F03B13/10
CPCF03B11/066F03B13/10H02N15/00Y02E10/20
Inventor 刘静马宏忠程俊
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)