Fan variable pitch mechanism

Abstract

The utility model belongs to the technical field of wind power generation equipment, in particular to a fan variable pitch mechanism, which is characterized in that a mounting cylinder is arranged on a protective shell along the circumferential direction, clamping plates are arranged in the mounting cylinder at intervals, damping rods and clamping springs are arranged between the clamping plates and the inner side wall of the mounting cylinder, and auxiliary rollers are arranged on the clamping plates; bearings are arranged on the side wall of the protective shell at intervals, and a mounting plate is arranged at the top of the protective shell; the paddle is provided with a rotating shaft matched with the bearing, and the rotating shaft is located in the mounting cylinder and matched with an auxiliary roller arranged on the clamping plate; the protective shell is rotationally connected with a first bevel gear, the rotating shaft is provided with a second bevel gear meshed with the first bevel gear, and the first bevel gear is driven by a power device.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind power generation equipment, in particular to a wind turbine pitch-changing mechanism. Background Art

[0002] Wind energy is a clean energy source. Wind turbines can convert the kinetic energy of wind into electrical energy, so they are widely used and developed in the world today. In the process of wind power generation, the power generation efficiency is related to the wind speed. However, when the wind speed is too high, the wind turbine blades are easily damaged. Therefore, a variable pitch structure is required to adjust the wind receiving area and angle of the blades to protect the wind turbine.

[0003] As one of the core parts of the control system of large wind turbines, the variable pitch structure plays a very important role in the safe, stable and efficient operation of the unit. Stable variable pitch control has become one of the hot spots and difficulties in the current research of large wind turbine control technology. In simple terms, the variable pitch control technology is to change the angle of attack of the airflow on the blades by adjusting the angle of the blades, thereby controlling the aerodynamic torque and aerodynamic power captured by the wind rotor.

[0004] The existing fan blades and motors are usually fixed in one piece. If one blade is damaged, all blades need to be replaced, which causes waste.

[0005] Therefore, the utility model designs a fan pitch mechanism to solve the technical problems existing in the prior art. Utility Model Content

[0006] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a wind turbine pitch mechanism to solve the above-mentioned technical problems.

[0007] The solution adopted by the utility model is: a wind turbine pitch mechanism, including a protective shell and a blade, characterized in that:

[0008] A mounting cylinder is provided on the protective shell along the circumferential direction, a clamping plate is provided inside the mounting cylinder, a damping rod and a clamping spring are provided between the clamping plate and the inner wall of the mounting cylinder, and an auxiliary roller is provided on the clamping plate;

[0009] Bearings are arranged at intervals on the side walls of the protective shell, and a mounting plate is arranged on the top;

[0010] The blade is provided with a rotating shaft matched with the bearing, the rotating shaft is located in the mounting tube and matched with the auxiliary roller provided on the clamping plate;

[0011] The protective shell is rotatably connected to a first bevel gear, the rotating shaft is provided with a second bevel gear meshing with the first bevel gear, and the first bevel gear is driven by a power device.

[0012] Preferably, three groups of mounting tubes are arranged at intervals on the protective shell, and a plurality of clamping plates are arranged in the three groups of mounting tubes, and the plurality of clamping plates are evenly distributed on the inner side wall of the mounting tube.

[0013] Preferably, an interference fit is arranged between the inner ring of the bearing and the rotating shaft.

[0014] Preferably, the power device comprises an electric motor disposed on the protective shell, the first bevel gear is driven by the first electric motor, and the first electric motor is electrically connected to the controller.

[0015] Preferably, the mounting plate is provided with a transmission shaft.

[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is one of the three-dimensional view angles of the present utility model.

[0018] Figure 2 It is one of the perspectives of the stereoscopic cross-sectional view of the present utility model.

[0019] Figure 3 yes Figure 2 A partial enlarged view of .

[0020] Figure 4 This is the second perspective of the stereoscopic cross-sectional view of the present invention.

[0021] Figure 5 yes Figure 4 A partial enlarged view of B.

[0022] Figure numerals: 1. protective shell; 2. blade; 3. mounting cylinder; 4. clamping plate; 5. damping rod; 6. clamping spring; 7. auxiliary roller; 8. bearing; 9. mounting plate; 10. rotating shaft; 11. first bevel gear; 12. second bevel gear; 13. motor; 14. transmission shaft. DETAILED DESCRIPTION

[0023] The above and other technical contents, features and functions of the present invention are described in detail below with reference to the attached Figure 1-5 The detailed description of the embodiments will clearly show that the structural contents mentioned in the following embodiments are all based on the drawings in the specification.

[0024] Various exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0025] Embodiment 1, a wind turbine pitch mechanism, comprising a protective shell 1 and a blade 2, characterized in that:

[0026] The protective shell 1 is provided with a mounting tube 3 along the circumferential direction, a clamping plate 4 is provided inside the mounting tube 3, a damping rod 5 and a clamping spring 6 are provided between the clamping plate 4 and the inner side wall of the mounting tube 3, and an auxiliary roller 7 is provided on the clamping plate 4;

[0027] The side walls of the protective shell 1 are provided with bearings 8 at intervals, and a mounting plate 9 is provided on the top;

[0028] The blade 2 is provided with a rotating shaft 10 matched with the bearing 8, the rotating shaft is located in the mounting tube 3, and is matched with the auxiliary roller 7 provided on the clamping plate 4;

[0029] The protective shell 1 is rotatably connected to a first bevel gear 11, and a second bevel gear 12 meshing with the first bevel gear 11 is provided on the rotating shaft, and the first bevel gear 11 is driven by a power device;

[0030] Three groups of mounting tubes 3 are arranged at intervals on the protective shell 1, and a plurality of clamping plates 4 are arranged in the three groups of mounting tubes 3, and the plurality of clamping plates 4 are evenly distributed on the inner wall of the mounting tubes 3;

[0031] The inner ring of the bearing 8 and the rotating shaft are arranged with interference fit;

[0032] The power device comprises a motor 13 provided on the protective shell 1, the first bevel gear 11 is driven by the first motor 13, and the first motor 13 is electrically connected to the controller;

[0033] The mounting plate 9 is provided with a transmission shaft 14 .

[0034] When the angle of the blade 2 is adjusted, the first bevel gear 11 can be driven to rotate by driving the motor 13. Under the action of the first bevel gear 11, the second bevel gear 12 drives the rotating shaft to rotate, thereby driving the blade 2 to adjust the angle. Since the clamping plate 4 is provided with an auxiliary roller 7, when the rotating shaft rotates, the smoothness is further increased under the action of the auxiliary roller 7. When the motor 13 stops, under the action of the damping rod 5 and the clamping spring 6, the clamping plate 4 is firmly attached to the outer wall of the rotating shaft, thereby ensuring the stability of the adjustment of the blade 2.

[0035] When installing the blade 2, first open the mounting plate 9, insert the rotating shaft of the blade 2 into the mounting tube 3, and under the action of the damping rod 5 and the clamping spring 6, the blade 2 is temporarily fixed in the mounting tube 3, and then the bearing 8 is installed to the side wall of the protective shell 1 and matched with the rotating shaft of the blade 2, and then the first bevel gear 11 and the second bevel gear 12 are installed, and finally the mounting plate 9 is matched with the protective shell 1.

[0036] Through the above, the blade 2 can be disassembled, and the disassembly is convenient. When the blade 2 rotates, the stability is high and the efficiency of converting electricity is significant.

[0037] The above description is only for illustrating the present invention, and it should be understood that the present invention is not limited to the above embodiments, and various variations that conform to the concept of the present invention are within the protection scope of the present invention.

Claims

1. A wind turbine pitch mechanism, comprising a protective shell (1) and a blade (2), characterized in that: A mounting cylinder (3) is provided on the protective shell (1) along the circumferential direction, a clamping plate (4) is provided inside the mounting cylinder (3), a damping rod (5) and a clamping spring (6) are provided between the clamping plate (4) and the inner wall of the mounting cylinder (3), and an auxiliary roller (7) is provided on the clamping plate (4); The protective shell (1) has bearings (8) arranged at intervals on the side walls and a mounting plate (9) arranged on the top; The blade (2) is provided with a rotating shaft (10) cooperating with the bearing (8); the rotating shaft (10) is located in the mounting tube (3) and cooperates with the auxiliary roller (7) provided on the clamping plate (4); The protective shell (1) is rotatably connected to a first bevel gear (11); a second bevel gear (12) meshing with the first bevel gear (11) is provided on the rotating shaft; and the first bevel gear (11) is driven by a power device.

2. A wind turbine pitch control mechanism according to claim 1, characterized in that: Three groups of mounting tubes (3) are arranged at intervals on the protective shell (1), and a plurality of clamping plates (4) are arranged in the three groups of mounting tubes (3), and the plurality of clamping plates (4) are evenly distributed on the inner side walls of the mounting tubes (3).

3. A wind turbine pitch control mechanism according to claim 2, characterized in that: The inner ring of the bearing (8) and the rotating shaft are arranged with an interference fit.

4. A wind turbine pitch mechanism according to claim 3, characterized in that: The power device comprises an electric motor (13) disposed on the protective shell (1), the first bevel gear (11) is driven by the first electric motor (13), and the first electric motor (13) is electrically connected to a controller.

5. A wind turbine pitch control mechanism according to claim 4, characterized in that: The mounting plate (9) is provided with a transmission shaft (14).

Images