A blade zero calibration device for a wind turbine

Abstract

The present invention relates to a zeroing device for blades of a wind turbine generator set, comprising a strip plate, and two cylinders respectively arranged at the two ends of the bottom surface of the strip plate; a handle, the handle is in a U-shape with long and short arms, the end of the short arm is fixed to the center of the bottom surface of the strip plate, the end of the long arm passes through the top surface of the strip plate in midair, and the length of the long arm is at least twice the length of the short arm, and the plane formed by the short arm and the long arm is perpendicular to the strip plate. Compared with the prior art, the present invention can realize the smooth movement of the entire device along the large range of the blade root bearing through the strip plate, the cylinder and the specially designed handle, while the handle realizes the alignment of the zero scale line and the marking line, thereby solving the problem of low efficiency of zeroing work of large-capacity wind turbine blades in the prior art.

Description

Technical Field

[0001] The present invention relates to a zero calibration device, in particular to a blade zero calibration device for a wind turbine. Background Art

[0002] In the daily annual regular inspection and maintenance of wind turbines, in order to ensure the accuracy of the blade pitch angle to ensure the safe, stable and maximum efficient operation of the wind turbine, blade zero calibration is an essential task. For example, Chinese Patent CN209743091U discloses a blade zero calibration tool for a wind turbine, which includes a strip-shaped mounting member, a strip-shaped indicating extension member, two clamping members, two abutting members, and an adjusting assembly for driving the two clamping members to open and close synchronously. One side of the middle of the mounting member is provided with a first hinge shaft perpendicular to its axial direction; the indicating extension member is telescopically connected to one end of the mounting portion; the two clamping members are respectively hinged on the first hinge shaft and form a V-shaped structure; the two abutting members are respectively vertically fixed to the ends of the clamping members away from the first hinge shaft in a one-to-one correspondence.

[0003] However, in some models of large-capacity wind turbines, there are high-strength fixing bolts at the connection between the blade root bearing and the hub. Due to the large size of the fixing bolts, the clamping members of the above zero calibration tool will conflict with the high-strength fixing bolts during the zero calibration work, and the available angle is too small. Summary of the Invention

[0004] The purpose of the present invention is to provide a blade zero calibration device for a wind turbine. Through a strip-shaped plate, a cylinder and a specially designed handle, it can realize the large-range smooth movement of the whole device along the blade root bearing, and at the same time, the handle can align the zero scale line and the marking line, solving the problem of low efficiency of blade zero calibration work in existing large-capacity wind turbines.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A blade zero calibration device for a wind turbine, comprising:

[0007] A strip-shaped plate, and two cylinders respectively arranged at both ends of the bottom surface of the strip-shaped plate;

[0008] A handle, which is in the shape of a U with long and short arms. The end of the short arm is fixed to the center of the bottom surface of the strip-shaped plate, the long arm end passes through the top surface of the strip-shaped plate in the air, and the length of the long arm is at least twice the length of the short arm. The plane formed by the short arm and the long arm is perpendicular to the strip-shaped plate.

[0009] The distance between the long arm and the plane where the strip-shaped plate is located gradually decreases from the root to the end of the long arm.

[0010] The cylinder is a hollow cylinder.

[0011] A baffle is provided between the cylinder and the strip plate, and the cross-sectional area of the baffle is larger than the cross-sectional area of the cylinder.

[0012] The baffle is disc-shaped and has a diameter larger than the width of the strip plate.

[0013] The cylinder is fixed to the strip plate by screws.

[0014] The projected length of the long arm on the plane of the strip plate is more than twice the projected length of the short arm on the plane of the strip plate.

[0015] The projected length of the long arm on the plane of the strip plate is 3 - 4 times the projected length of the short arm on the plane of the strip plate.

[0016] The short arm includes two longitudinal plates perpendicular to the strip plate, and the two ends of the two longitudinal plates are connected to each other, forming a cavity therebetween.

[0017] The end of the long arm is provided with barbs.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1) Through the strip plate, the cylinder and the specially designed handle, while enabling the entire device to move smoothly within a large range along the blade root bearing, the handle can align the zero scale line and the marking line, solving the problem of low work efficiency in zero calibration of large-capacity wind turbine blades in the prior art.

[0020] 2) The distance between the long arm and the plane where the strip plate is located gradually decreases from the root to the end of the long arm, getting closer to the scale line and reducing the deviation caused by visual inspection.

[0021] 3) The cylinder is a hollow cylinder, reducing the weight and being convenient.

[0022] 4) The addition of the baffle can further reduce the size of the strip plate and improve the stability of the device fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the present invention;

[0024] Wherein: 1, strip plate; 2, cylinder; 3, short arm; 4, long arm; 5, groove part; 6, baffle. DETAILED DESCRIPTION OF THE INVENTION

[0025] The present invention will be described in detail below with reference to the drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation manners and specific operation processes are given, but the protection scope of the present invention is not limited to the following embodiments.

[0026] A blade zero calibration device for a wind turbine unit includes

[0027] A strip plate 1, and two cylinders 2 respectively arranged at two ends of the bottom surface of the strip plate 1;

[0028] The handle is in a U-shape with long and short arms 3, the end of the short arm 3 is fixed to the center of the bottom surface of the strip plate 1, the end of the long arm 4 passes through the top surface of the strip plate 1 in mid-air, and the length of the long arm 4 is at least twice the length of the short arm 3, and the plane formed by the short arm 3 and the long arm 4 is perpendicular to the strip plate 1.

[0029] When in use, the two cylinders 2 are pressed against the surface of the blade root bearing, the groove 5 of the handle is held by hand, and then the entire device is moved along the blade root bearing so that the end of the short arm 3 is aligned with the marking line and the end of the long arm 4 is aligned with the zero scale line on the blade to achieve zero calibration.

[0030] In this embodiment, the distance between the long arm 4 and the plane where the strip plate 1 is located gradually decreases from the root to the end of the long arm 4, and the end is closer to the scale line, thereby reducing the deviation caused by visual inspection.

[0031] In another embodiment, the cylinder 2 is a hollow cylinder 2, which can reduce weight and thus reduce operating difficulty.

[0032] In another embodiment, a baffle 6 is provided between the cylinder 2 and the strip plate 1. The cross-sectional area of ​​the baffle 6 is larger than the cross-sectional area of ​​the cylinder 2. The baffle 6 is disc-shaped and has a diameter larger than the width of the strip plate 1, so that the width of the strip plate 1 can be further reduced. The baffle 6 is hung on the surface of the blade root bearing with the fixing bolts to prevent the strip plate 1 from colliding with the fixing bolts, thereby improving the stability of the device fixation and broadening the types of applicable wind turbine blades. The cylinder 2 is fixed to the strip plate 1 by screws.

[0033] In another embodiment, the projection length of the long arm 4 on the plane of the strip plate 1 is more than twice the projection length of the short arm 3 on the plane of the strip plate 1. Preferably, the projection length of the long arm 4 on the plane of the strip plate 1 is 3-4 times the projection length of the short arm 3 on the plane of the strip plate 1.

[0034] In other embodiments, the short arm 3 includes two longitudinal plates perpendicular to the strip plate 1, and the two ends of the two longitudinal plates are connected to each other to form a cavity therebetween, thereby increasing the stability of the handle. The end of the long arm 4 is provided with a barb.

[0035] In other embodiments of the present application, the long arm 4 may be a multi-section structure, and the length may be adjusted in this way to adapt to different wind turbine blades, thereby broadening the scope of application.

Claims

1. A blade zeroing device for a wind turbine, characterized in that, Comprising, a strip board, and two cylinders respectively provided at both ends of the bottom surface of the strip board; a handle, the handle being in the shape of a U with long and short arms, the end of the short arm being fixed to the center of the bottom surface of the strip board, the long arm end passing through the top surface of the strip board in the air, and the length of the long arm being at least twice the length of the short arm, the plane formed by the short arm and the long arm being perpendicular to the strip board, and the distance between the plane where the long arm is located and the plane of the strip board gradually decreasing from the root to the end of the long arm; the cylinder is a hollow cylinder, a baffle is provided between the cylinder and the strip board, the cross-sectional area of the baffle is larger than the cross-sectional area of the cylinder, the baffle is in the shape of a disc and has a diameter larger than the width of the strip board, and the baffle is hung on the surface of the bearing at the root of the blade where the fixing bolt is provided to prevent the strip board from colliding with the fixing bolt; When in use, the two cylinders are closely attached to the surface of the bearing at the root of the blade, the hand holds the groove of the handle, and then the whole device is moved along the bearing at the root of the blade, so that the end of the short arm is aligned with the marking line and the end of the long arm is aligned with the zero scale line on the blade to achieve zero calibration.

2. The blade zero calibration device for a wind turbine unit according to claim 1, characterized in that The cylinder is fixed to the strip board by screws.

3. The blade zeroing device for a wind turbine unit according to claim 1, characterized in that The projected length of the long arm on the plane of the strip board is more than twice the projected length of the short arm on the plane of the strip board.

4. The blade zeroing device for a wind turbine unit according to claim 3, characterized in that, The projected length of the long arm on the plane of the strip board is 3 - 4 times the projected length of the short arm on the plane of the strip board.

5. The blade zeroing device for a wind turbine unit according to claim 1, characterized in that, The short arm includes two longitudinal plates perpendicular to the strip board, and the two longitudinal plates are connected at both ends, and a cavity is formed between them.

6. The blade zero calibration device for a wind turbine according to claim 1, characterized in that, The end of the long arm is provided with a barb.

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