Pitch changing device and wind driven generator with pitch changing function

Abstract

The utility model relates to the technical field of wind driven generator equipment, and aims to solve the technical problems of huge structure and high cost. In order to solve the technical problem, the utility model provides the variable pitch device and the wind driven generator with the variable pitch function. The device comprises a telescopic part, a middle connecting rod and an arc-shaped connecting rod. One end of the middle connecting rod is connected with the output end of the telescopic component. The axis of the arc-shaped connecting rod coincides with the axis of the blade; two ends of the arc-shaped connecting rod are respectively a first end and a second end; the first end is movably connected with the other end of the middle connecting rod; and the second end is movably connected with the connecting piece. A through hole coaxial with the main shaft is formed in the main shaft, and a middle connecting rod of the variable pitch device is connected into the through hole in a sliding mode. The output end of the telescopic component stretches out and draws back and is used for driving the blades to rotate around the axes of the blades so as to achieve variable pitch. The device is simple in structure, compact in layout, stable and reliable in operation and low in cost, and does not affect the layout of other parts of the generator.

Description

TECHNICAL FIELD

[0001] The utility model relates to wind driven generator equipment technical field especially is a kind of variable pitch device and wind driven generator with variable pitch function. BACKGROUND

[0002] As one of the core parts of large wind turbine control system, the variable pitch system has a very important role for the safe, stable and efficient operation of the unit. Stable variable pitch control has become one of the hotspots and difficulties of current large wind turbine control technology research. Simply speaking, the variable pitch control technology is to adjust the pitch angle of the blade, change the angle of attack of the airflow to the blade, and then control the aerodynamic torque and aerodynamic power captured by the wind wheel.

[0003] The variable pitch device of prior art is large in structure, which makes the structure of generator larger, affects the layout of other components of generator, and is high in cost. UTILITY MODEL CONTENTS

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the above-mentioned problems existing in the prior art.

[0005] To solve the above technical problems, on the one hand, the utility model provides a variable pitch device, comprising:

[0006] a telescopic component;

[0007] an intermediate connecting rod, one end of which is connected to the output end of the telescopic component.

[0008] an arc-shaped connecting rod, the axis of which coincides with the axis of the blade; the two ends of the arc-shaped connecting rod are a first end and a second end respectively; the first end is movably connected to the other end of the intermediate connecting rod;

[0009] wherein the output end of the telescopic component is telescopic, for driving the blade to rotate around the axis of the blade to realize variable pitch.

[0010] In an embodiment of the utility model, the arc-shaped connecting rod is two, and the two arc-shaped connecting rods are symmetrically connected on both sides of the intermediate connecting rod.

[0011] In an embodiment of the utility model, the end of the intermediate connecting rod is provided with a connecting lug with a hole; the arc-shaped connecting rod is provided with a connecting hole, and the connecting hole and the connecting lug are hingedly connected through a pin shaft.

[0012] In an embodiment of the utility model, the rotation angle of the second end is 90°.

[0013] In an embodiment of the utility model, the telescopic component is an electric cylinder.

[0014] In one embodiment of the utility model, the outer wall of connecting piece is equipped with connecting rod, connecting rod is hinged with second end.

[0015] In one embodiment of the utility model, the outer wall of connecting piece is equipped with connecting rod, connecting rod is hinged with second end.

[0016] In one embodiment of the utility model, the outer wall of connecting piece is equipped with connecting rod, connecting rod is hinged with second end.

[0017] In one embodiment of the utility model, the outer wall of connecting piece is equipped with connecting rod, connecting rod is hinged with second end.

[0018] In one embodiment of the utility model, the outer wall of connecting piece is equipped with connecting rod, connecting rod is hinged with second end.

[0019] The above technical scheme of the utility model has the following advantages compared with prior art:

[0020] The variable pitch device and the wind driven generator with variable pitch function have the advantages that the intermediate connecting rod is driven to stretch and contract in the main shaft by the output end of the telescopic component, so that the arc-shaped connecting rod drives the blade to rotate around the axis of the blade to change the pitch, the structure is simple, the layout is compact, the operation is stable and reliable, the cost is low, and the layout of other components of the generator is not affected. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to make the content of the utility model more easily understood clearly, the utility model is further explained in detail below according to the specific embodiments of the utility model and in conjunction with the drawings, wherein:

[0022] Figure 1 It is the structure schematic view of a kind of wind driven generator with variable pitch function in preferred embodiment of the utility model;

[0023] Figure 2 It is Figure 1 It is the sectional view of a kind of wind driven generator with variable pitch function;

[0024] Figure 3 It is the structure schematic view of a kind of variable pitch device in preferred embodiment of the utility model;

[0025] Figure 4 It is Figure 1Connection diagram of the middle variable-paddle device and the main shaft and the hub;

[0026] Description of the drawings: 100, main body;

[0027] 200, blade;

[0028] 300, hub; 310, bearing seat;

[0029] 400, main shaft; 410, through hole; 411, second mounting step; 420, bushing;

[0030] 500, gearbox;

[0031] 600, generator;

[0032] 700, variable-paddle device; 710, telescopic part; 720, intermediate connecting rod; 721, connecting lug; 722, first mounting step; 730, arc-shaped connecting rod;

[0033] 800, connecting piece; 810, connecting rod. DETAILED DESCRIPTION

[0034] The utility model will be further explained in combination with the drawings and specific embodiments, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model.

[0035] Referring to Figures 1-4 The utility model discloses a wind driven generator with variable-paddle function, which comprises:

[0036] A main body 100, at least two blades 200, a hub 300, a main shaft 400, a gearbox 500, a generator 600 and a variable-paddle device 700; the at least two blades 200 are connected through a connecting piece 800; the hub 300 is movably connected with the connecting piece 800; the main shaft 400 is rotatably connected with the main body 100, one end of the main shaft 400 is connected with the hub 300, and the other end of the main shaft 400 is connected with the generator 600 through the gearbox 500.

[0037] The pitch control device 700 includes a telescopic component 710, an intermediate connecting rod 720, and an arc-shaped connecting rod 730. The telescopic component 710 is connected to the main body 100. A through hole 410 coaxial with the main shaft 400 is provided, and the intermediate connecting rod 720 is slidably connected in the through hole 410. One end of the intermediate connecting rod 720 is connected to the output end of the telescopic component 710. The axis of the arc-shaped connecting rod 730 coincides with the axis of the blade 200; the two ends of the arc-shaped connecting rod 730 are a first end and a second end, respectively; the first end is movably connected (e.g., hinged) to the other end of the intermediate connecting rod 720; and the second end is movably connected to the connecting member 800. The telescopic component 710 extends and retracts to drive the blade 200 to rotate around its axis to achieve pitch control.

[0038] Specifically, in this embodiment, the output end of the telescopic component 710 drives the intermediate connecting rod 720 to extend and retract in the main shaft 400, thereby causing the arc-shaped connecting rod 730 to drive the blade 200 to rotate around the axis of the blade 200 to change the pitch. It has a simple structure, compact layout, stable and reliable operation, low cost, and does not affect the layout of other components of the generator 600.

[0039] Furthermore, there are two arc-shaped connecting rods 730, which are symmetrically connected to both sides of the middle connecting rod 720. Specifically, the two arc-shaped connecting rods 730 provided in this embodiment make the operation smoother and more stable.

[0040] In one embodiment of this utility model, the end of the intermediate connecting rod 720 is provided with a connecting lug 721 with a hole; the arc-shaped connecting rod 730 is provided with a connecting hole, and the connecting hole and the connecting lug 721 are hinged by a pin. Specifically, the connection method of this embodiment is simple and low in cost.

[0041] Furthermore, the rotation angle of the second end is 90°. For example, the second end (i.e., blade 200 in the vertical plane) rotates from 45 degrees to 135 degrees. The 90° pitch angle is sufficient to meet practical needs.

[0042] Furthermore, the telescopic component 710 is an electric cylinder. The telescopic component 710 can also be a hydraulic cylinder. Alternatively, the telescopic component 710 can also be a pneumatic cylinder. Specifically, in this embodiment, the telescopic component 710 uses an electric cylinder for ease of use.

[0043] Furthermore, a connecting rod 810 is provided on the outer wall of the connector 800, and the connecting rod 810 is hinged to the second end. Specifically, the second end is hinged to the connecting rod 810, which makes it more adaptable.

[0044] Furthermore, a first mounting step 722 is provided on the outer wall of the middle part of the intermediate connecting rod 720 of the pitch device 700, and a second mounting step 411 corresponding to the first mounting step 722 is provided in the through hole 410. Specifically, in this embodiment, the retraction of the intermediate connecting rod 720 can be limited by the cooperation of the first mounting step 722 and the second mounting step 411 to prevent it from overtraveling.

[0045] Furthermore, at least one bushing 420 is provided in the through hole 410. Specifically, the bushing 420 can reduce the friction between the spindle 400 and the intermediate connecting rod 720, reduce the wear of the spindle 400 and the intermediate connecting rod 720, and extend their service life.

[0046] Furthermore, the hub 300 and the connector 800 are movably connected (rotatably connected) via bearings. In some embodiments, the hub 300 is provided with a plurality of bearing seats 310, the number of bearing seats 310 being the same as the number of blades 200. Bearings are provided in the bearing seats 310, and the connector 800 mates with the inner ring of the bearing.

[0047] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A pitch control device, characterized in that: include: Telescopic components; The intermediate connecting rod is connected at one end to the output end of the telescopic component; The axis of the arc-shaped connecting rod coincides with the axis of the blade; The two ends of the arc-shaped connecting rod are a first end and a second end, respectively; the first end is movably connected to the other end of the intermediate connecting rod; The output end of the telescopic component extends and retracts to drive the blade to rotate around its axis to achieve pitch control.

2. The pitch control device according to claim 1, characterized in that: There are two arc-shaped connecting rods, which are symmetrically connected to both sides of the middle connecting rod.

3. The pitch control device according to claim 1, characterized in that: The end of the intermediate connecting rod is provided with a connecting lug with a hole; the arc-shaped connecting rod is provided with a connecting hole, and the connecting hole and the connecting lug are hinged by a pin.

4. The pitch control device according to claim 1, characterized in that: The rotation angle of the second end is 90°.

5. The pitch control device according to claim 1, characterized in that: The telescopic component is an electric cylinder.

6. A wind turbine generator with pitch control, comprising: The main body, at least two blades, hub, main shaft, gearbox, and generator; The at least two blades are connected by a connector; the hub is movably connected to the connector. The main shaft is rotatably connected to the main body, one end of the main shaft is connected to the wheel hub, and the other end is connected to the generator through the gearbox; characterized in that: it further includes: The pitch control device according to any one of claims 1 to 5, wherein the second end of the pitch control device is movably connected to the connecting member; and the telescopic component of the pitch control device is connected to the main body; The main shaft has a through hole coaxial with it, and the intermediate connecting rod of the pitch device is slidably connected in the through hole.

7. The wind turbine generator with pitch control according to claim 6, characterized in that: The outer wall of the connector is provided with a connecting rod, which is hinged to the second end.

8. The wind turbine generator with pitch control according to claim 6, characterized in that: The middle connecting rod of the pitch device is provided with a first mounting step on the outer wall, and the through hole is provided with a second mounting step that cooperates with the first mounting step.

9. The wind turbine generator with pitch control function according to claim 6, characterized in that: At least one bushing is provided in the through hole.

10. The wind turbine generator with pitch control according to claim 6, characterized in that: The wheel hub and the connecting member are movably connected by bearings.

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