Abstract

A heat dissipation device for a high power vertical axis wind generator. A stator portion and a rotor portion in the shape of plane disks are axially arranged in a space surrounded by a center shaft (1) and end caps (6) of the wind generator. A through wind tunnel (5) is disposed in a flat gap in the end caps. At least one exhaust fan (9) is disposed in the wind tunnel. Many vents (10) are arranged through the armature (7) of the stator portion, and many vents (11) are also arranged through the permanent magnets (8) of the rotor portion. The heat dissipation device has a good heat dissipation effect, therefore the critical temperature in the internal of the wind generator is reduced, a local overheating phenomenon is avoided, and a development toward high power of the vertical axis wind generator is favored.

IPC Classes  ?

• H02K 9/02 - Arrangements for cooling or ventilating by ambient air flowing through the machine

Abstract

An energization wing, which is a windshield component and comprises a windshield surface, is set on a supporter for corresponding to one side surface of a wind wheel in a windmill generator with a vertical shaft, and the side surface is one part of the windward side when the wind wheel is being used; the rotation of the wind wheel blades corresponding to the part of the windward side is hindered because of wind stream function, and the energization wing is used to shield the side surface. A windmill generator with a vertical shaft having an energization wing is provided, and the energization wing is a plate or small wind wheel. Setting the energization wing in front of the windward side of the wind wheel blocks wind stream forming resistance moment on the wind wheel of the windmill generator, thus the rotating torque of the wind wheel is enlarged, and the efficiency of the windmill generator is enhanced by at least 25%.

IPC Classes  ?

• F03D 3/04 - Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor having stationary wind-guiding means, e.g. with shrouds or channels
• F03D 9/00 - Adaptations of wind motors for special useCombinations of wind motors with apparatus driven therebyWind motors specially adapted for installation in particular locations
• F03D 1/04 - Wind motors with rotation axis substantially parallel to the air flow entering the rotor having stationary wind-guiding means, e.g. with shrouds or channels

Abstract

A displacement mechanism of an energy-increasing wing for a vertical axis wind power generator includes a support device (21) and a driving device (10). The support device (21) is arranged on a fixed bracket and provided with a connecting structure fixedly connected to an energy-increasing wing (2', 20). The energy-increasing wing (2', 20) is located outside of the maximum rotation circumference (a) of blades (02). The driving device (10) is arranged on the fixed bracket and connected to the support device (21) so that the support device (21) can move and thereby the upwind-rotating blades (02) are covered with the energy-increasing wing (2', 20). The displacement mechanism is simple in structure and can regulate the position of the energy-increasing wing (2', 20) according to changes of wind direction or wind speed so as to increase the efficiency of the wind power generator.

IPC Classes  ?

• F03D 3/04 - Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor having stationary wind-guiding means, e.g. with shrouds or channels
• F03D 7/06 - Controlling wind motors the wind motors having rotation axis substantially perpendicular to the air flow entering the rotor

Abstract

A high-power vertical axis wind generator includes a vertical blade wind wheel (01) and an energy-increasing wing (1, 2, 401). The energy-increasing wing (1, 2, 401) is a wind shield arranged on a bracket in a manner of not blocking the blades (02) to rotate and in front of the windward of the wind wheel (01). The energy-increasing wing (1, 2, 401) corresponds to the upwind rotating portion of blades (02) of the wind wheel (01) so that the side of the wind wheel (01) blocking its rotating is blocked. The efficiency of the vertical axis wind generator may be increased above 25% by arranged the energy-increasing wing (1, 2, 401) in front of the windward of the wind wheel (01).

IPC Classes  ?

• F03D 3/04 - Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor having stationary wind-guiding means, e.g. with shrouds or channels

Abstract

A magnetic levitation supporting structure for a vertical shaft disc-type motor comprises at least two magnetic levitation supporting members (5, 6). The first magnetic levitation supporting member (5) is composed of a first annular upper permanent magnet component mounted under the upper end housing (3) of a rotor and a first annular lower permanent magnet component mounted over a stator (2). The first annular upper and lower permanent magnet components have opposite magnetizing directions and repulse each other to form thrust force. The second magnetic levitation supporting member (6) is composed of a second annular upper permanent magnet component mounted over the lower end housing (4) of the rotor and a second annular lower permanent magnet component mounted under the stator (2). The second annular upper and lower permanent magnet components have opposite magnetizing directions and repulse each other to form thrust force.

IPC Classes  ?

• H02K 21/24 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
• H02N 15/00 - Holding or levitation devices using magnetic attraction or repulsion, not otherwise provided for

Abstract

A braking method and a braking device used for a vertical shaft wind-driven generator are provided. The rotational speed of the vertical shaft wind-driven generator is monitored after the starting of the vertical shaft wind-driven generator. An electromagnetic brake (4) and a pneumatic brake (5) are started respectively when the rotational speed of the vertical shaft wind-driven generator exceeds a value of safety. According to the value of a rotating torque, the electromagnetic brake (4) and the pneumatic brake (5) are started in turn to realize a braking. When the braking effects of the electromagnetic brake (4) and the pneumatic brake (5) are not obvious, a contactor of a braking resistor is started to realize a resistance braking. Due to the combined application of a plurality of kinds of braking means, the effective control of the rotational speed of the wind-driven generator is realized, and the emergency stop is avoided under a high wind speed. The security of the vertical shaft wind-driven generator is improved, and the overlarge impact to the electric network is avoided.

IPC Classes  ?

• F03D 7/06 - Controlling wind motors the wind motors having rotation axis substantially perpendicular to the air flow entering the rotor
• H02P 3/22 - Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an AC motor by short-circuit or resistive braking

Abstract

A wind-wheel blade for vertical axis wind power generator includes a blade-shaped frame (1) and an outer skin fixed on the frame. The blade is constructed as a vertical column form, and its horizontal section is aerofoil-section shaped, that is, the outside surface of the blade is a streamline cambered surface. The smooth transition portion between the outside surface and the opposite inside surface forms a big windward end of the blade, i.e. the leading portion of the blade. Due to the streamline shape and the specific frame structure, the blade has such advantages as light weight, improved strength and rigidity, simple manufacture and assembly and high shaping accuracy.

IPC Classes  ?

• F03D 3/06 - Rotors
• F03D 1/06 - Rotors

Abstract

A magnetic suspension support device for a vertical shaft wind-driven generator comprises at least three magnetic suspension support mechanisms. The first magnetic suspension support mechanism is arranged at a position of an annular outer edge of a basic shaft (1) used for supporting a wind wheel. The second magnetic suspension support mechanism (10) is arranged at a position of an annular outer edge of an armature (4). The third magnetic suspension support mechanism (11) is arranged at a position of an annular outer edge of a center disk of the generator. Each magnetic suspension support mechanism comprises a plurality of groups of magnetic steels distributed in a circle. The magnetic steels adopt a matrix-type structure. The polarities of the magnetic steels whose positions are opposite up and down are opposite. The magnetic suspension support device can reduce the resisting moment of rotation of the vertical shaft wind-driven generator, and the starting wind speed of the wind wheel is also reduced. Thus the generating efficiency is improved. The operating life of bearings and the maintenance period of the vertical shaft wind-driven generator are prolonged.

IPC Classes  ?

• H02K 7/09 - Structural association with bearings with magnetic bearings
• F03D 3/00 - Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor

Abstract

A supporting rod structure of a wind wheel in a vertical axis wind power generator includes supporting rods (1,9,10) provided between blades (0) and a hub or rotating parts of a generator (7). One end of the supporting rod (1,9,10) is provided with a connecting structure (3) connected with an inner side surface of the blade (0), and the other end is provided with a connecting structure (3') connected with the hub or the rotating parts of the generator (7). By using this supporting rod structure, the strength and stiffness of connecting and supporting the blades can be increased and the wind wheel can operate safely.

IPC Classes  ?

• F03D 3/06 - Rotors

Abstract

A high-power vertical axis wind generator includes a vertical blade wind wheel (01) and an energy-increasing wing (1, 2, 401). The energy-increasing wing (1, 2, 401) is a wind shield arranged on a bracket in a manner of not blocking blades (02) to rotate and positioned in front of the windward of the wind wheel (01). The energy-increasing wing (1, 2, 401) corresponds to the blades (02) in the upwind rotating portion of the wind wheel (01) so that the side of the wind wheel (01) blocked from rotating is shielded. The efficiency of the vertical axis wind generator may be increased by above 25% by arranging the energy-increasing wing (1, 2, 401) in front of the windward of the wind wheel (01).

IPC Classes  ?

• F03D 3/04 - Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor having stationary wind-guiding means, e.g. with shrouds or channels

Abstract

A braking equipment for a vertical shaft wind generator consists of a brake disc (8) connected to a generator rotor (3), a brake bracket (7) mounted on a main shaft (1), and a caliper-disc type brake (9) mounted on the brake bracket (7). A braking method for the braking equipment of the vertical shaft wind generator includes the following steps: when the generator is braked, the jaws of the brake (9) are closed to press upper and lower brake pads (6) against the brake disc (8), so as to brake the generator rotor (3); when the generator runs, the jaws of the brake (9) are opened, so as to rotate the generator rotor (3). The braking equipment and the braking method can avoid emergency brake of the generator at a high wind velocity, and thus improve the safety of the generator.

IPC Classes  ?

• F03D 3/00 - Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor

Abstract

A vertical shaft disc-type outer rotor electric machine and a cooling structure thereof are provided. The cooling structure comprises an upper ventilating hole (11), a lower ventilating hole (12) and a heat exchanger within a rotating shaft. The upper ventilating hole (11) located on a circumferential direction of a position between a bearing (7) of an upper end housing (3) of a rotor and a middle stator (2) is used for linking up the internal space of the stator and the rotor with the internal space of the shaft. The lower ventilating hole (12) located on a circumferential direction of a position between a bearing (8) of a lower end housing (4) of the rotor and the middle stator (2) is used for linking up the internal space of the stator and the rotor with the internal space of the shaft. The heat exchanger within the rotating shaft connected between the upper ventilating hole (11) and the lower ventilating hole (12) in the rotating shaft is composed of an air passage, a fan (5) and an air-air heat exchange plate (6).

IPC Classes  ?

• H02K 9/04 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
• H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium