CN103452748A - Suspension type vertical axis wind turbine - Google Patents

Abstract

Suspension vertical axis wind turbine belongs to the wind turbine technology; the main controller is installed on the lower support, and the lower pressure sensor and upper pressure sensor, stepping motor and stepping motor are respectively installed between the bearing sleeve, the lower support and the upper bearing end cover. The motor controller is fixed on the lower flange, and the two transverse blade supports are fixed on the lower beam. The transverse blade support shafts are respectively fixed on the two ends of the transverse blades of the symmetrical airfoil. The transverse vane is rotatably fitted on the lower beam, and the transverse vane angle control transmission mechanism connects the stepper motor with the transverse vane; the upper and lower pressure sensors are connected to the general controller through wires, and the general controller is connected to the stepper motor controller Wireless connection; the fan is suspended during operation, the mechanical wear of parts is small, the service life is long, and the utilization rate of wind energy is high.

Description

Suspended Vertical Axis Wind Turbine

technical field

The invention belongs to the technical field of wind turbines, and mainly relates to a suspended vertical axis wind turbine.

Background technique

With the reduction of non-renewable energy and the enhancement of environmental protection awareness, the development and utilization of renewable and non-environmentally polluting wind energy has become a development trend, and wind turbines are one of them. At present, wind turbines are mainly divided into two types: horizontal axis wind turbines and vertical axis wind turbines. Compared with horizontal-axis wind turbines, vertical-axis wind turbines have superior technical characteristics. Therefore, the development and utilization of vertical-axis wind turbines has become a future development trend. However, due to the huge size and heavy weight of the large vertical axis wind turbine, the bearings, brackets and bases that support the vertical axis wind turbine bring a relatively large load, and the mechanical friction is relatively large when the wind turbine is rotating. In addition to the wear and tear of parts and the reduction of service life, it also reduces the utilization rate of wind energy, resulting in waste of wind energy loss and reducing the operation effect. In order to solve the above problems, there have been researches on two types of vertical axis wind turbines using magnetic levitation bearings and beams with airfoil structures, but the former is expensive and complex in structure, and the angle of attack of the beams in the latter is not adjustable, and its ability to generate lift effect is poor. .

Contents of the invention

The purpose of the present invention is to solve the problems existing in the above-mentioned prior art and combine the actual operation conditions to design and provide a suspension type vertical axis wind turbine with a new structure. By installing a lift device on the beam of the vertical axis wind turbine, the The purpose of reducing and offsetting the weight loaded on the bearing during operation, reducing the wear of parts, prolonging the service life of the machine, and improving the utilization rate of wind energy.

The purpose of the present invention is achieved in this way: a suspended vertical axis wind turbine, a bearing sleeve is fixed on the lower support, and the vertical shaft is rotatably assembled on the bearing sleeve through the lower bearing and the upper bearing, and the upper bearing end cover Fitted on the upper end of the bearing sleeve, on the vertical axis from top to bottom through the upper flange and the lower flange respectively equipped with the upper beam and the lower beam, the wind turbine blades are fitted on the outer ends of the upper and lower beams, on the lower The main controller is installed on the support, and the lower pressure sensor is supported and equipped between the upper part of the lower support and the lower part of the bearing sleeve, and the upper pressure sensor is supported and equipped between the upper end of the bearing sleeve and the upper bearing end cover. The motor controller is fixed on the lower flange and connected by wires. The two transverse blade brackets are fixed on the lower beam. The two ends of the transverse blades of the symmetrical airfoil are respectively fixed on the transverse blade support shafts. The transverse blade rotation angle control The transmission mechanism connects the stepping motor with the transverse blades; the upper and lower pressure sensors communicate with the general controller respectively through wires, and the general controller communicates with the stepping motor controller wirelessly.

The invention creates the principle that the rotating blades are used to generate lift and the magnitude of the lift can be changed by controlling the windward attack angle of the blades, and the lift of the transverse blades and the gravity of the wind turbine can be judged by detecting the pressure difference between the upper and lower ends of the bearing sleeve By continuously fine-tuning the angle of attack of the horizontal blades, the wind turbine can be lifted at any time within the rated speed range to offset the gravity of the wind turbine, ensuring that it works in a suspended state. The characteristics of the invention are: effectively avoiding the greater mechanical friction of the wind turbine during work due to gravity, reducing or even avoiding the pressure load caused by the wind turbine to the supporting bearings, brackets, and bases, prolonging the life, and at the same time Improve wind energy utilization and increase power generation efficiency.

Description of drawings

Figure 1 is a schematic diagram of the structure of a suspended vertical axis wind turbine

Figure 2 is a schematic diagram of the structure of the transverse blade angle control transmission mechanism

Fig. 3 is a sectional view of A-A direction in Fig. 2

Description of part number in the figure:

1. Lower support, 2. Lower pressure sensor, 3. Bearing sleeve, 4. Lower bearing, 5. Vertical shaft, 6. Upper bearing, 7. Upper pressure sensor, 8. Upper bearing cover, 9. Lower flange , 10, upper flange, 11, upper beam, 12, wind turbine blade, 13, transverse blade support, 14, transverse blade support shaft, 15, transverse blade, 16, lower beam, 17, transverse blade angle control transmission mechanism, 18. Stepper motor, 19. Stepper motor controller, 20. Master controller, 21. Lead screw, 22. Rack nut, 23. Cylindrical gear, 24. Worm screw, 25. Worm wheel.

Detailed ways

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

A suspension type vertical axis wind turbine, a bearing sleeve 3 is fixed on the lower support 1, a vertical shaft 5 is rotatably fitted on the bearing sleeve 3 through a lower bearing 4 and an upper bearing 6, and an upper bearing end cover 8 is fitted on the On the upper end of the bearing sleeve 3, the upper beam 11 and the lower beam 16 are respectively fitted on the vertical shaft 5 through the upper flange 10 and the lower flange 9, and the wind turbine blades 12 are fitted on the upper and lower beams 11, 16 On the outer end, install the main controller 20 on the lower support (1), support and fit the lower pressure sensor 2 between the upper part of the lower support 1 and the lower part of the bearing sleeve 3, and install the lower pressure sensor 2 between the upper end of the bearing sleeve 3 and the upper bearing end cover The pressure sensor 7 is supported between the 8, the stepper motor 18 and the stepper motor controller 19 are fixed on the lower flange 9, and are connected by wires, and the two transverse blade brackets 13 are fixed on the lower beam 16, symmetrically The two ends of the transverse blades 15 of the airfoil are respectively fixed on the transverse blade support shafts 14, and the transverse blade rotation angle control transmission mechanism 17 connects the stepping motor 18 with the transverse blades 15; the upper and lower pressure sensors 7, 2 are connected by wires They communicate with the general controller 20 respectively, and the general controller 20 communicates with the stepper motor controller 19 wirelessly.

The transverse blade rotation angle control transmission mechanism 17 is composed of a lead screw 21, a rack nut 22, a cylindrical gear 23, a worm 24 and a worm wheel 25, and the rack nut 22 is fitted on the lead screw 21 in an axially movable manner. , the lead screw 21 is connected with the stepper motor 18, the worm gear 25 is fixed on the transverse blade support shaft 14, the cylindrical gear 23 is fixed on the worm 24, and the rack part of the cylindrical gear 23 and the rack nut 22 meshing, the worm 24 meshes with the worm wheel 25.

When in use, when the suspended vertical axis wind turbine does not reach the rated operating state, the windward attack angle of the transverse blade 15 is 0°, and because it is a symmetrical airfoil, the lift is close to zero at this time, and the suspension system does not work. When the wind turbine reaches the rated working state, the lower pressure sensor 2 and the upper pressure sensor 7 start to work, detect the pressure at both ends of the bearing sleeve 3, and transmit the detection results to the general controller 20 for analysis. When the pressure is greater than the lift force, the master controller 20 issues instructions to the stepper motor controller 19 through a wireless connection, and the stepper motor controller 19 controls the work of the stepper motor 18, and controls the transmission mechanism 17 to increase the transverse blade through the transverse blade angle. The windward angle of attack of 15 increases the lift of the suspension system. When the lower pressure of the bearing sleeve 3 is less than the upper pressure, the gravity is less than the lift force, the master controller 20 sends instructions to the stepper motor controller 19 through the wireless connection, and the stepper motor controller 19 controls the work of the stepper motor 18, and through the transverse blade rotation angle The transmission mechanism 17 is controlled to reduce the windward attack angle of the transverse blades 15, thereby reducing the lift force of the suspension system.

Claims (2)

1. a floated vertical axis windmill, be fixedly mounted with bearing housing (3) on undersetting (1), above by lower bearing (4) and upper bearing (metal) (6), be equipped with rotationally vertical shaft (5) at bearing housing (3), top bearing cover (8) is fitted on bearing housing (3) upper end portion, be equipped with respectively upper beam (11) and bottom end rail (16) by upper flange (10) and lower flange (9) from top to bottom on vertical shaft (5), pneumatic equipment blades made (12) is fitted in, bottom end rail (11, 16) on outer end, it is characterized in that at the upper master controller (20) of installing of undersetting (1), support equipped lower pressure sensor (2) between undersetting (1) top and bearing housing (3) bottom, support equipped upward pressure sensor (7) between bearing housing (3) upper end portion and top bearing cover (8), stepper motor (18) and controllor for step-by-step motor (19) are packed on lower flange (9), and be communicated with by wire, two cross blade supports (13) fit on bottom end rail (16) admittedly, on cross blade (15) two end part of symmetrical airfoil, be fixedly mounted with respectively on cross blade back shaft (14), cross blade controlling angle driving mechanism (17) is connected stepper motor (18) with cross blade (15), described upper and lower pressure transducer (7,2) is communicated with master controller (20) respectively by wire, master controller (20) and controllor for step-by-step motor (19) wireless communications.

2. floated vertical axis windmill according to claim 1, it is characterized in that described cross blade controlling angle driving mechanism (17) is by leading screw (21), rack nut (22), cylindrical gears (23), worm screw (24) and worm gear (25) form, described rack nut (22) can axially movably be fitted on leading screw (21), leading screw (21) is connected with stepper motor (18), described worm gear (25) is packed on cross blade back shaft (14), described cylindrical gears (23) fits on worm screw (24) admittedly, and cylindrical gears (23) meshes with the tooth-strip part of rack nut (22), worm screw (24) and worm gear (25) engagement.

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