Impeller locking device of wind generating set

Abstract

The utility model discloses an impeller locking device of a wind generating set, which comprises an impeller and a generator cabin, the center of the back of the impeller is provided with a rotatable rotating shaft which extends into the generator cabin, the outer wall of the rotating shaft is circumferentially provided with a plurality of locking insertion holes, and a locking component is arranged above the locking insertion holes. A locking device capable of achieving automatic locking after the rotating speed of the impeller is slowed down is designed, after the rotating speed of the impeller reaches a set rotating speed range, a rod body in a hydraulic telescopic piece stretches out downwards to drive a locking block and a ball to abut against a rotating shaft, and when a locking insertion hole is directly aligned with the locking block, the rod body is locked. Therefore, rotation stopping can be directly achieved through resistance matching of the locking block and a braking system, the waiting time is shortened, when misalignment occurs, in the follow-up slow-speed rotation process of the impeller, due to the fact that the locking block is located in the moving track of the locking inserting hole of the rotating shaft, locking and auxiliary rotation stopping can be achieved when follow-up alignment is conducted, and the rotation speed of the impeller is reduced. Therefore, the subsequent maintenance time can be greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of impeller locking, in particular to an impeller locking device for a wind turbine generator set. Background Art

[0002] The impeller locking mechanism is an important safety device used by wind turbine maintenance personnel to lock the impeller. It is only used during wind turbine maintenance. When the wind turbine is under maintenance, the impeller and main shaft are generally stopped by the braking system first, and then the locking pin of the impeller locking mechanism is driven forward along the cylindrical pin hole, so that the tapered part of the front end of the locking pin extends into the tapered pin hole of the impeller locking disk to lock the impeller.

[0003] The current impeller locking mechanism requires the impeller to completely stop rotating before it can be locked, resulting in a long waiting time; in addition, after the impeller stops rotating, the pin hole position of the impeller itself often deviates, resulting in the need for multiple position adjustments later, resulting in a long time spent on overall locking, affecting maintenance efficiency. Utility Model Content

[0004] The purpose of the present invention is to provide an impeller locking device for a wind turbine generator set in order to solve the above-mentioned problem.

[0005] The technical solution adopted by the present invention is as follows: an impeller locking device of a wind turbine generator set, comprising an impeller and a generator cabin, a rotating shaft extending into the generator cabin and rotatable is provided at the center of the back of the impeller, a plurality of locking sockets are circumferentially opened on the outer wall of the rotating shaft, a locking assembly is provided above the locking socket, the locking assembly comprises a locking block, a ball and a hydraulic telescopic part, the ball is embedded in the interior of the locking block by a rotating connection, the tail of the rod body of the hydraulic telescopic part is equipped with a guide seat with a guide groove, the locking block is slidably installed in the guide groove of the guide seat, and a spring is directly installed on the upper end face of the locking block and the upper inner wall of the guide seat.

[0006] In a preferred embodiment, the locking block and the ball are located directly above the movement trajectory of the locking socket.

[0007] In a preferred embodiment, a hydraulic system, a main control panel and a speed sensor are provided in the generator compartment. The speed sensor is located directly below the protrusion on the rotating shaft. The hydraulic telescopic part, the speed sensor and the hydraulic system are all electrically connected to the main control panel.

[0008] In a preferred embodiment, a brake assembly for controlling the impeller to stop rotating is further provided in the generator compartment.

[0009] In a preferred embodiment, the locking assembly also includes a horizontal plate installed in the generator compartment, the hydraulic cylinder body of the hydraulic telescopic part is installed on the horizontal plate, and the lower end of the horizontal plate is installed with a reinforcing sleeve that allows the rod body of the hydraulic telescopic part to pass through.

[0010] In a preferred embodiment, the bottom wall of the locking block is provided with an opening to accommodate the extension of the lower end of the ball.

[0011] To sum up, due to the adoption of the above-mentioned technical solution, the beneficial effect of the utility model is: a locking device is designed that can automatically lock after the impeller speed slows down. After the impeller speed reaches the set speed range, the hydraulic telescopic part is used to drive the locking part to descend, and the locking part can be used to directly lock the rotating part that is still rotating, thereby greatly reducing the subsequent maintenance time, and has advantages that the current impeller locking device does not have. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the internal structure of the utility model as a whole;

[0013] Figure 2 for Figure 1 Schematic diagram of the enlarged structure at point a in the middle.

[0014] Markings in the figure: 1-impeller, 2-speed sensor, 3-rotating shaft, 4-brake assembly, 5-generator compartment, 6-hydraulic telescopic part, 7-cross plate, 8-reinforcement sleeve, 9-guide seat, 10-spring, 11-locking block, 12-locking socket, 13-ball. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0016] Reference Figure 1-2A wind turbine rotor locking device includes an impeller 1 and a generator cabin 5. A rotating shaft 3 extending into the generator cabin 5 and rotatable is provided at the center of the back of the impeller 1. A plurality of locking sockets 12 are circumferentially opened on the outer wall of the rotating shaft 3. A locking assembly is provided above the locking socket 12. The locking assembly includes a locking block 11, a ball 13 and a hydraulic telescopic member 6. The ball 13 is embedded in the interior of the locking block 11 by a rotational connection. The tail of the rod body of the hydraulic telescopic member 6 is equipped with a guide seat 9 with a guide groove. The locking block 11 is slidably installed in the guide groove of the guide seat 9. A spring 10 is directly installed on the upper end surface of the locking block 11 and the upper inner wall of the guide seat 9. A locking device is designed which can automatically lock after the speed of the impeller 1 slows down. After the speed of the impeller 1 reaches the set speed range, the rod in the hydraulic telescopic part 6 extends downward, driving the locking block 11 and the ball 13 to abut against the rotating shaft 3. When the locking socket 12 is directly aligned with the locking block 11, the locking block 11 can cooperate with the resistance of the brake assembly 4 to directly achieve stopping, thereby reducing waiting time. When it is not aligned, the impeller 1 can achieve locking and auxiliary stopping during the subsequent slowing down of the rotation because the locking block 11 is within the running track of the locking socket 12 of the rotating shaft 3, thereby greatly reducing the subsequent maintenance time.

[0017] Furthermore, the locking block 11 and the ball 13 are located directly above the movement trajectory of the locking socket 12. The bottom wall of the locking block 11 is provided with an opening to accommodate the extension of the lower end of the ball 13. The ball 13 can reduce the resistance of the locking assembly against the rotating shaft 3, thereby meeting the adjustment of the subsequent rotation position of the rotating shaft 3 when it is misaligned, and can also avoid affecting the locking assembly when the rotating shaft 3 rotates.

[0018] Furthermore, a hydraulic system, a main control panel and a speed sensor 2 are provided in the generator compartment 5. The speed sensor 2 is located directly below the protrusion of the rotating shaft 3. The hydraulic telescopic part 6, the speed sensor 2 and the hydraulic system are all electrically connected to the main control panel. The rotation speed of the rotating shaft 3 can be monitored by the set speed sensor 2. Only when the rotation speed is lower than the set range, the locking assembly is controlled to descend to avoid the rotating shaft 3 from moving too fast and causing damage to the locking assembly.

[0019] Furthermore, a brake assembly 4 for controlling the impeller 1 to stop is provided in the generator compartment 5. The use of the brake assembly 4 to stop the impeller 1 and the rotating shaft 3 is a function possessed by existing wind turbines. The brake assembly 4 is also an essential part of existing wind turbines, so the specific structure will not be explained one by one.

[0020] Furthermore, the locking assembly also includes a horizontal plate 7 installed in the generator compartment 5, the hydraulic cylinder body of the hydraulic telescopic part 6 is installed on the horizontal plate 7, and the lower end of the horizontal plate 7 is installed with a reinforcing sleeve 8 that allows the rod body of the hydraulic telescopic part 6 to pass through. The reinforcing sleeve 8 can provide auxiliary support and auxiliary guidance for the rod body, and the reinforcing sleeve 8 is used here as a reinforcing part of the rod body.

[0021] Among them, the hydraulic telescopic part 6 includes a cylinder body, a rod body and a pipeline system connected to the hydraulic system. How to achieve hydraulic telescopic expansion is not described here one by one. Moreover, using the hydraulic system in the wind turbine as the driving part can also reduce costs and overall occupied space.

[0022] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An impeller locking device for a wind turbine generator set, comprising an impeller and a generator cabin, characterized in that: A rotating shaft extending into the generator compartment and being rotatable is provided at the center of the back side of the impeller, a plurality of locking sockets are circumferentially opened on the outer wall of the rotating shaft, a locking assembly is provided above the locking socket, the locking assembly comprises a locking block, a ball and a hydraulic telescopic part, the ball is embedded in the interior of the locking block by a rotating connection, a guide seat with a guide groove is installed at the tail of the rod body of the hydraulic telescopic part, the locking block is slidably installed in the guide groove of the guide seat, and a spring is directly installed on the upper end surface of the locking block and the upper inner wall of the guide seat.

2. The impeller locking device of a wind turbine generator set according to claim 1, characterized in that: The locking block and the ball are located directly above the movement track of the locking socket.

3. The impeller locking device of a wind turbine generator set according to claim 1, characterized in that: The generator compartment is provided with a hydraulic system, a main control panel and a rotation speed sensor. The rotation speed sensor is located directly below the protrusion on the rotating shaft. The hydraulic telescopic member, the rotation speed sensor and the hydraulic system are all electrically connected to the main control panel.

4. The impeller locking device of a wind turbine generator set according to claim 1, characterized in that: A brake assembly for controlling the impeller to stop rotating is also provided in the generator compartment.

5. The impeller locking device of a wind turbine generator set according to claim 1, characterized in that: The locking assembly also includes a transverse plate installed in the generator compartment, the hydraulic cylinder body of the hydraulic telescopic component is installed on the transverse plate, and the lower end of the transverse plate is installed with a reinforcing sleeve that allows the rod body of the hydraulic telescopic component to pass through.

6. The impeller locking device of a wind turbine generator set according to claim 1, characterized in that: The bottom wall of the locking block is provided with an opening that allows the lower end of the ball to extend out.

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