Horizontal shaft magnetic suspension wind driven generator

Abstract

The invention relates to a horizontal shaft magnetic suspension wind driven generator, comprising a stationery part and a rotating part; the stationery part comprises a radial magnetic bearing stator part, an axial magnetic bearing stator part, a generator stator part, a front protective bearing, a rear protective bearing, a stator shell and a blower tower; the rotating part comprises a blade, a hub, a rotating shaft, a radial magnetic bearing rotor part, an axial magnetic bearing rotor part and a generator rotor part; an axial magnetic bearing is composed of a permanent magnet without a control system, a radial magnetic bearing is a permanent magnet bias magnetic bearing, the permanent magnet provides bias flux density, and control force is adjusted by current; the blower rotor realizes five-freedom-degree stable suspension, can completely eliminate the mechanical friction of the rotating part and the stationery part, reduce starting resisting moment and starting wind velocity of the blower and improve the wind energy utilization rate. All components of the invention have rational and compact layout, the maintenance of the blower can be reduced and the service life is prolonged.

Description

technical field [0001] The invention relates to a magnetic levitation wind power generator, in particular to a horizontal axis magnetic levitation wind power generator for converting wind energy into electric energy. Background technique [0002] Wind energy is widely distributed on the earth, has high utilization value, and its development and utilization will not pollute the environment, so that various wind power generators have flourished. Common wind power generators generally use mechanical bearings to support the rotor system. When the fan is running There is serious friction and wear between the rotating part and the non-rotating part, which seriously affects the starting wind speed and wind energy conversion efficiency of the fan. Small mechanical friction and wear, the technology disclosed in the Chinese invention patent ZL200610011434.7 "Full Permanent Magnetic Levitation Wind Power Generator" is: For horizontal axis wind power generators, the rotor system is supp...

AI Technical Summary

Problems solved by technology

[0002] Wind energy is widely distributed on the earth, has high utilization value, and its development and utilization will not pollute the environment, so that various wind power generators have flourished. Common wind power generators generally use mechanical bearings to support the rotor system. When the fan is running There is serious friction and wear between the rotating part and the non-rotating part, which seriously affects the starting wind speed and wind energy conversion efficiency of the fan. Small mechanical friction and wear, the technology disclosed in the Chinese invention patent ZL200610011434.7 "Full Permanent Magnetic Levitation Wind Power Generator" is: For horizontal axis wind power generators, the rotor system is supported by mechanical bearings, and the permanent magnetic levitation offset bearings are used to offset the rotor gravity. The invention only weakens the influence of the gravity of the rotor on the mechanical bearings to a certain extent, but the fan is still in a low-friction operating state, which does not fundamentally eliminate the mechanical friction between the rotating part and the non-rotating part, and cannot greatly reduce the starting wind speed of the fan

Wuhan University of Technology has conducted research on small maglev fans, using permanent magnetic passive magnetic bearings in the radial direction and a small steel ball for auxiliary support in the axial direction to complete the mechanical restraint of the fan rotor in the axial direction, but at this time the fan The rotor still has mechanical contact in the axial direction, and the whole system has no control system, and the stability and anti-interference ability of the system are poor

The technical solution given in the US invention patent US7,391,128B2 "Windgenerator system using attractive magnetic forces to reduce the load on the bearings" is that the shaft of the wind generator is connected by a gearbox, and the two rotors are respectively connected by radial magnetic bearings and axial magnetic bearings , and all adopt the fully active form, and the rotating shaft realizes segmented suspension. Although there is no mechanical bearing in the system, there is still mechanical contact due to the gearbox in the fan system, and the complete suspension of the entire rotor system has not been realized, and the rotating shaft with gears , the design of the control system of the magnetic bearing is more complex

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