Yaw rotation limiting structure

Abstract

The utility model discloses a yaw rotation limiting structure, which relates to the technical field of wind driven generators, and comprises a travel switch and a zero switch, the travel switch is arranged on a stand column, and during rotation, the travel switch is limited according to the matching between a contact iron on a flange connecting disc and the zero switch. By means of the technical scheme, when the draught fan conducts yaw rotation, the zero point switch can record the yaw angle in real time, the travel switch is matched with the touch iron to serve as the yaw limit at the designated position, and when the position is reached, rotation is not needed any more. The zero point switch is used for verifying the yaw angle. And mechanical stop irons are fixedly arranged on the upright post and the flange connecting disc. According to the technical scheme, the travel switch is arranged as a yaw limit position, the mechanical stop iron is arranged as a guarantee, when the travel switch fails, the mechanical stop iron can directly stop the transmission platform from rotating, and part damage caused by excessive rotation is further prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbines, in particular to a yaw rotation limiting structure. Background Art

[0002] A wind turbine is a clean energy device that converts wind energy into electricity. It typically consists of a rotor, generator, tower, and control system. The rotor consists of multiple blades. When wind blows over the blades, they rotate, transferring mechanical energy to the generator through a transmission system. The generator converts this mechanical energy into electrical energy, which is ultimately transmitted through the power grid to various users. The operating principle of a wind turbine is based on the capture and conversion of wind energy. Driven by wind, the rotor begins to rotate. This rotational motion, accelerated by transmission devices such as gearboxes, drives the generator rotor. The relative motion of the magnetic field within the generator and the conductors generates an electromotive force (EMF) in the conductors based on the principle of electromagnetic induction, which in turn generates current, generating electrical energy. Yaw limitering is a critical safety and design concept. It refers to a limiting mechanism designed to prevent the rotation or rotation of the equipment from exceeding a predetermined safety range. This limiter system is typically implemented mechanically, hydraulically, or electronically to ensure stability and safety during operation. Yaw slew limiters are a key safety mechanism in wind turbines, ensuring that the turbine does not exceed predetermined safety limits during yaw and slew. This mechanism, implemented through mechanical, hydraulic, or electronic control, is designed to prevent structural damage, mechanical failure, or accidents caused by excessive yaw or slew. The yaw slew limiter system is configured based on the turbine's design parameters, operating environment conditions, and safety regulations, ensuring stable operation and reliable safety while efficiently capturing wind energy.

[0003] Since wind turbines need to adjust themselves to different wind directions, yaw rotation equipment is often installed on them. The yaw rotation angle needs to be strictly controlled. If the angle is too large, it will cause damage to important components such as cables. If the yaw angle is too small, it will not be conducive to capturing wind energy. Utility Model Content

[0004] In order to solve the above technical problems, the utility model discloses a yaw rotation limit structure, comprising a column, a travel switch seat is fixedly mounted on the column, a travel switch 1 and a travel switch 2 are fixedly mounted on the travel switch seat, a slewing bearing is mounted on the slewing bearing, a flange connecting plate is fixedly mounted on the flange connecting plate, and a contact iron is fixedly mounted on the flange connecting plate.

[0005] Furthermore, a zero point switch is installed on the slewing bearing, and the yaw angle is verified according to the position of the contact iron on the flange connection plate during rotation.

[0006] Furthermore, a rotary reducer is mounted on the column, a zero point switch seat is fixedly mounted on the rotary reducer, and the zero point switch is fixedly mounted on the zero point switch seat.

[0007] Furthermore, a first mechanical stop iron is fixedly mounted on the flange connection plate; and a second mechanical stop iron is fixedly mounted on the column.

[0008] Furthermore, the contact iron is used to sense the position of the limit switch and the zero point switch when rotating with the flange connection plate; when the limit switch 1 and the limit switch 2 fail, the mechanical stop iron 1 and the mechanical stop iron 2 come into contact to provide limit protection.

[0009] The beneficial effects of the present invention compared with the prior art are:

[0010] (1) Through the technical solution of the present invention, when the wind turbine performs yaw rotation, the travel switch can record the yaw angle in real time, and can verify the yaw angle in real time through the zero point switch to ensure the accuracy of the yaw angle.

[0011] (2) Through the technical solution of the present invention, the travel switch 1 and the travel switch 2 can cooperate with the touch iron. When the touch iron follows the rotation to reach the position of the travel switch 2, it will no longer rotate, thereby preventing excessive rotation from causing damage to structures such as cables.

[0012] (3) Through the technical solution of the present invention, mechanical iron stop 1 and mechanical iron stop 2 are set as a safeguard. When the limit switch 1 and the limit switch 2 fail, the mechanical iron stop 1 and the mechanical iron stop 2 can directly block the rotation of the transmission platform, further preventing damage to parts caused by excessive rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the position of a yaw rotation limiting structure according to an embodiment of the present utility model.

[0014] Figure 2 This is a side view of a yaw rotation limiting structure according to an embodiment of the present utility model.

[0015] Figure 3 This is a top view of a yaw rotation limiting structure according to an embodiment of the present utility model.

[0016] Figure numbers: 1-column; 2-fan transmission system; 3-fan blades; 4-transmission platform; 5-rotary bearing; 6-rotary reducer; 7-zero point switch seat; 8-zero point switch; 9-touch iron; 10-travel switch 1; 11-travel switch seat; 12-travel switch 2; 13-flange connection plate; 14-mechanical stop iron 1; 15-mechanical stop iron 2. DETAILED DESCRIPTION

[0017] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] like Figure 1-Figure 3 The yaw rotation limit structure shown is installed at the rotation position of the fan. The fan includes a column 1, which is connected to the transmission platform 4 through a slewing bearing 5. The slewing bearing 5 is fixedly installed on the column 1, and the slewing bearing 5 is installed on the slewing bearing 5. The column 1 is equipped with a slewing reducer 6. The slewing reducer 6 has its own motor. The slewing reducer 6 drives the flange connection plate 13 to rotate through a worm gear structure. The flange connection plate 13 is connected to the transmission platform 4, and the fan transmission system 2 is installed on the transmission platform 4. In this embodiment, a yaw rotation limit structure includes a zero point switch 8. The zero point switch 8 is a position sensor. The zero point switch 8 is installed on the zero point switch seat 7. The zero point switch seat 7 is fixedly installed on the slewing reducer 6. The slewing reducer 6 is fixedly installed on the column 1. When rotating, it cooperates according to the position of the contact iron 9 on the flange connection plate 13. Through the above technical solution, when the fan performs yaw rotation, the zero point switch 8 can verify and record the yaw angle in real time.

[0019] A first travel switch 10 and a second travel switch 12 are fixedly mounted on the slewing bearing 5. In this embodiment, a travel switch base 11 is fixedly mounted on the slewing bearing 5, and the first travel switch 10 and the second travel switch 12 are fixedly mounted on the travel switch base 11. The first travel switch 10 and the second travel switch 12 are position sensors. Through the above technical solution, the first travel switch 10 and the second travel switch 12 can cooperate with the contact iron 9. When the contact iron 9 rotates to the position of the second travel switch 12, it acts as a yaw limit and stops rotating, preventing excessive rotation from damaging cables and other structures. When the contact iron 9 rotates to the position of the first travel switch 10 or the second travel switch 12, the first travel switch 10 and the second travel switch 12 can send a signal to the control system, causing the flange connection plate 13 to stop rotating or rotate in the opposite direction.

[0020] A mechanical stop 14 is fixedly mounted on the flange connection plate 13, and a mechanical stop 2 15 is fixedly mounted on the column 1. Mechanical stop 14 and mechanical stop 2 15 are mechanical structures. When the limit switch 1 10 and the limit switch 2 12 fail, mechanical stop 14 and mechanical stop 2 15 are used for limiting. The flange connection plate 13 is rotationally connected to the slewing bearing 5. A contact 9 is provided on the edge of the slewing bearing 5. The contact 9 rotates to cooperate with the limit switch 1 10 and the limit switch 2 12. The contact 9 is bent into two parts, one part of which is fixedly connected to the column 1, and the other part is perpendicular to it and can cooperate with the limit switch. Through the above technical solution, mechanical stop 14 and mechanical stop 2 15 are provided as a guarantee. When the limit switch 1 10 and the limit switch 2 12 fail, mechanical stop 14 and mechanical stop 2 15 can directly block the rotation of the flange connection plate 13, further preventing damage to parts caused by excessive rotation.

[0021] Working principle: During yaw rotation, the motor drives the slewing reducer 6, and then drives the slewing bearing 5 and the flange connection plate 13 to rotate. At the same time, the touch iron 9 will also rotate. During the rotation process, the rotation position is recorded and the information is sent back through the zero point switch 8. When the touch iron 9 contacts the limit switch 1 10 or the limit switch 2 12, it stops rotating or rotates in the opposite direction by a small angle. If the limit switch 10 and the limit switch 2 12 fail, it will continue to rotate, and then the mechanical stop iron 14 will follow the rotation until it contacts the mechanical stop iron 2 15, and the rotation is mechanically prevented at this time.

[0022] The above embodiments merely represent one or several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A yaw rotation limiting structure, characterized in that: The invention comprises a column (1), a travel switch seat (11) is fixedly mounted on the column (1), a travel switch 1 (10) and a travel switch 2 (12) are fixedly mounted on the travel switch seat (11), a rotary bearing (5) is mounted on the column (1), a flange connection plate (13) is mounted on the rotary bearing (5), and a contact iron (9) is fixedly mounted on the flange connection plate (13).

2. The yaw rotation limiting structure according to claim 1, characterized in that: The slewing bearing (5) is provided with a zero point switch (8), which verifies the yaw angle according to the position of the contact iron (9) on the flange connection plate (13) during rotation.

3. The yaw rotation limiting structure according to claim 2, characterized in that: A rotary reducer (6) is mounted on the column (1), a zero point switch seat (7) is fixedly mounted on the rotary reducer (6), and the zero point switch (8) is mounted on the rotary reducer (6) via the zero point switch seat (7).

4. The yaw rotation limiting structure according to claim 3, characterized in that: A first mechanical stop iron (14) is fixedly mounted on the flange connection plate (13); and a second mechanical stop iron (15) is fixedly mounted on the column (1).

5. The yaw rotation limiting structure according to claim 4, characterized in that: The contact iron (9) is used to sense the position of the travel switch and the zero switch when rotating along with the flange connection plate (13); when the travel switch 1 (10) and the travel switch 2 (12) fail, the mechanical stop iron 1 (14) and the mechanical stop iron 2 (15) come into contact to provide position limiting protection.

Images