Cabin cabinet door fastening device of wind driven generator

Abstract

The invention belongs to wind driven generator electrical equipment, and discloses a cabin cabinet door fastening device of a wind driven generator, a cabin cabinet comprises a cabinet body and a cabinet door, the top of the cabinet body is provided with at least two lifting lugs used for lifting the cabinet body, and the cabin cabinet door fastening device comprises a cross beam, a baffle plate and a fastening bolt, one side of the cross beam is provided with a bayonet part which can be clamped on one side of the root part of the lifting lug, the baffle plate adopts a sliding fit structure which can move along the length direction of the cross beam, the fastening bolt is in threaded fit with the baffle plate, so that the movable end of the fastening bolt is propped against the cabinet door, and meanwhile, the cross beam can be tensioned by the baffle plate, so that the cabinet door can be fixed. And the cross beam is clamped at the root part of the lifting lug. According to the cabin cabinet door fastening device of the wind driven generator, the problem that the cabin cabinet door shakes due to strong wind weather is solved, and mistaken shutdown of a fan is effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of wind turbine accessories, and in particular to a fastening device for a cabin cabinet door of a wind turbine. Background Art

[0002] The fan control cabinet is located at the tower base and cabin of the fan. The tower base cabinet and the cabin cabinet integrate most of the electrical components of the fan. Since the fan shakes greatly during strong winds, the cabinet door needs to be opened every time the fan is inspected and repaired to take safety measures to shut down the fan. As a result, the cabinet door locks are worn due to frequent use, and the doors are stuck and cannot be closed tightly. The contact surface of the cabinet door is worn and cannot be clamped. In windy weather, the cabinet door swings open and triggers the safety chain loop button, causing the fan to shut down due to malfunction in strong winds and unable to generate electricity normally.

[0003] In order to solve this defect during daily operation and maintenance, the measure adopted is to replace the lock. However, the cabinet door has already been worn out and cannot be replaced. Therefore, even if the lock is replaced and the cabinet door is successfully locked, the cabinet door will disengage if it swings for a long time, causing the emergency stop button to be triggered and the fan to stop due to failure. Summary of the invention

[0004] In view of the problem that cabinet doors are difficult to lock in the prior art, the present invention provides a cabinet door fastening device for a wind turbine cabin cabinet, which improves the locking effect of the cabinet door and prevents the cabinet door from shaking and being thrown open in windy weather, thereby causing the emergency stop button to be triggered.

[0005] The present invention is achieved through the following technical solutions:

[0006] A fastening device for a cabin cabinet door of a wind turbine, the cabin cabinet comprising a cabinet body and a cabinet door, the top of the cabinet body having at least two lifting ears for lifting the cabinet body, the cabin cabinet door fastening device comprising a crossbeam, a baffle and a fastening bolt, one side of the crossbeam is provided with a bayonet portion which can be clamped on one side of the root of the lifting ear, the baffle adopts a sliding fitting structure which can move along the length direction of the crossbeam, the fastening bolt is threadedly matched with the baffle so that the movable end of the fastening bolt is abutted against the cabinet door, and at the same time the baffle can tighten the crossbeam and make the crossbeam clamped on the root of the lifting ear.

[0007] Optionally, the baffle adopts an L-shaped structure in cross section, one end of which is slidably fitted with the crossbeam, and the other end is placed on the surface of the cabinet door.

[0008] Optionally, the crossbeam is provided with a slide groove, a pad is provided on one side of the slide groove, and the other side is the baffle, and the baffle and the pad are connected by a first detachable fastening component.

[0009] Optionally, the baffle has a U-shaped cross-section at one end of the cabinet door, and a pressure plate is provided at the movable end of the fastening bolt. The pressure plate also has a U-shaped structure. The pressure plate and the baffle are fastened together by relative snap-fitting of the openings, and a guide structure is provided between the pressure plate and the baffle in a manner that moves along the fastening bolt.

[0010] Optionally, the guide structure is a guide groove arranged on the side of the pressure plate, and the pressure plate and the baffle are connected by a second detachable fastening component.

[0011] Optionally, the end surface of the pressing plate is provided with a rubber pad for abutting against the cabinet door.

[0012] Optionally, a shutter is also provided on the cabinet door, and a detachable cover structure is provided on the shutter. A telescopic airbag is also provided on the cabinet door, and the telescopic airbag is connected to the cover structure through a pipeline. A telescopic rod is provided in the middle of the telescopic airbag, and a ratchet and pawl mechanism is provided on the fastening bolt. A transmission mechanism for converting linear motion into rotational motion is provided between the telescopic rod and the ratchet and pawl, which is used to drive the rotation of the ratchet and pawl mechanism, and the ratchet and pawl mechanism is used to drive the fastening bolt to rotate in one direction.

[0013] Optionally, the cover structure is provided with an exhaust valve.

[0014] Optionally, the telescopic airbag is made of elastic material.

[0015] Optionally, positioning components are provided at both ends of the telescopic airbag, a guide rail is provided on the cabinet door, the positioning components are configured on the guide rail, and one of the positioning components is fixedly arranged and the other positioning component is slidably arranged.

[0016] The technical solution of the present invention has at least the following beneficial effects:

[0017] The wind turbine cabin cabinet door fastening device of the present invention has a fastening structure composed of a crossbeam, a baffle and fastening bolts arranged between the cabinet body and the cabinet door. The crossbeam can be limited by relying on the lifting ears on the top of the cabinet body, and the crossbeam is connected to the fastening bolts through the baffle. The cabinet door can be abutted and fixed by screwing the fastening bolts, which solves the problem of violent shaking of the cabinet door due to fluctuating wind pressure in the cabinet body in windy weather, thereby causing the wind turbine to shut down incorrectly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of the cabin cabinet of Embodiment 1 of the present invention;

[0019] Figure 2 for Figure 1 A magnified view of part A;

[0020] Figure 3 This is a left view of the cabin cabinet of Embodiment 1 of the present invention;

[0021] Figure 4 for Figure 3 A magnified view of part B;

[0022] Figure 5 This is a front view of a cabin cabinet according to Embodiment 2 of the present invention;

[0023] Figure 6 for Figure 5 Enlarged view of part C.

[0024] Icons: 1-cabinet body, 11-lifting ear, 2-cabinet door, 21-shutter, 31-baffle, 311-first detachable fastening component, 32-cross beam, 321-slide groove, 33-fastening bolt, 34-pressure plate, 341-guide groove, 35-rubber pad, 36-pad, 4-cover structure, 41-exhaust valve, 5-telescopic airbag, 51-positioning component, 6-telescopic rod, 7-ratchet and pawl mechanism, 8-guide rail. DETAILED DESCRIPTION

[0025] Example 1

[0026] Reference Figure 1-Figure 4 The wind turbine cabin cabinet door fastening device of the present invention comprises a cabinet body 1 and a cabinet door 2. The cabinet body 1 has at least two lifting ears 11 on the top for lifting the cabinet body 1. The two lifting ears 11 are respectively located at two sides close to the cabinet door 2. The cabinet door 2 generally adopts a single door or a double door. The present embodiment takes a double door as an example.

[0027] The cabin cabinet door fastening device includes a crossbeam 32, a baffle 31 and a fastening bolt 33. The crossbeam 32 is supported by a metal material that is the same as the cabinet body 1 or has a certain strength. A bayonet portion (not shown) that can be snapped into one side of the root of the ear 11 is provided on one side of the crossbeam 32. The length of the crossbeam 32 is close to the width of the cabinet body 1. The bayonet portion adopts a long circular hole structure design, which can just be snapped into the root of the ear 11. The two ears 11 correspond to two bayonet portions respectively. The bayonet portion is similar to a U-shaped structure, and the opening width is slightly larger than the root outer diameter of the ear 11. The spacing of the bayonet portions is consistent with the spacing of the ears 11. In this way, the crossbeam 32 can be directly snapped in from the back to the front of the ear 11 during installation. The baffle 31 adopts a sliding matching structure that can move along the length direction of the cross beam 32. The fastening bolt 33 is threadedly matched with the baffle 31, so that the movable end of the fastening bolt 33 is abutted against the cabinet door 2. At the same time, the baffle 31 can tighten the cross beam 32 and make the cross beam 32 clamped at the root of the ear 11. The baffle 31 realizes the connection between the fastening bolt 33 and the cross beam 32, and plays a connecting role. When the fastening bolt 33 is screwed, the fastening bolt 33 moves toward the cabinet door 2. At this time, the distance between the cabinet door 2 and the baffle 31 is pulled apart, which is equivalent to separating the baffle 31 away from the cabinet door 2. When the baffle 31 moves, the cross beam 32 connected to it can be tightened, so that the cross beam 32 and the ear 11 are clamped more tightly. In this way, the compression effect on the cabinet door 2 is maintained by the fastening bolt 33, thereby solving the problem that the cabinet door 2 shakes due to the fluctuating wind pressure in the cabinet.

[0028] The fastening device of this embodiment can be arranged in different ways according to different structures of the cabinet door 2. If it is a single-door structure, since the baffle 31 adopts a sliding matching structure that can move along the length direction of the crossbeam 32, the baffle 31 can be moved to the side where the cabinet door 2 can be opened and closed to fasten the cabinet door 2. If it is a double-door structure, two baffles 31 can be provided to fasten the two cabinet doors 2 respectively. The present embodiment takes a double door as an example and provides a more optimized method, that is, a pressure plate 34 is provided at the movable end of the fastening bolt 33, and the contact area between the fastening bolt 33 and the cabinet door 2 is increased by providing the pressure plate 34. In this way, for the double door structure, a set of baffle plate 31 and fastening bolt 33 is sufficient, and the baffle plate 31 slides to the gap position of the cross beam 32 or the cabinet door 2, and the pressure plate 34 of the fastening bolt 33 presses the two cabinet doors 2 at one time. On the one hand, it can simplify the fastening device, avoid setting up two sets of fastening, and is more convenient in operation; on the other hand, this structure is very convenient when opening and closing the door, especially when only one door is opened, it is only necessary to slide the baffle plate 31 to the other cabinet door 2 that does not need to be opened, and the door that needs to be opened can be opened. This structural design has another advantage in that the clamping assembly composed of the pressure plate 34, the fastening bolts 33 and the baffle 31 is pressed against the door gap position of the two cabinet doors 2. The wind pressure in the cabinet generally causes the two doors to open and close at the same time. Therefore, the clamping assembly is pressed against the door gap position, and the force is offset from the middle to both sides. The force of the two doors to both sides can be offset or consumed. Such a structure can effectively prevent this force from offsetting to both sides. Compared with the single-door structure, the stability will be better.

[0029] In this embodiment, the baffle 31 preferably adopts a structure with an L-shaped cross section, one end of which is slidably matched with the cross beam 32, and the other end is placed on the surface of the cabinet door 2. The sliding matching structure adopts a slide groove 321 set on the cross beam 32, one side of the slide groove 321 is provided with a pad 36, and the baffle 31 is arranged on the other side. The baffle 31 and the pad 36 are connected by a first detachable fastening component 311, and the first detachable fastening component 311 can be connected with bolts. When it is necessary to open the door, it is only necessary to loosen the first detachable fastening component 311 to move the baffle 31; when closing the door, the baffle 31 is moved to the middle of the door gap, the middle of the baffle 31 is kept aligned with the door gap, and then the first detachable fastening component 311 is locked, and then the fastening bolt 33 is screwed to press the cabinet door 2.

[0030] When tightening the fastening bolt 33, in order to ensure that the pressing plate 34 can move along a straight line, so that it can accurately press the position of the door gap. The baffle 31 adopts a U-shaped cross-section structure at one end of the cabinet door 2, and the pressing plate 34 also adopts a U-shaped structure. The pressing plate 34 and the baffle 31 are buckled together in an opening-to-baffle manner, and a guide structure is provided between the pressing plate 34 and the baffle 31 in a manner of moving along the fastening bolt 33. The guide structure is a guide groove 341 provided on the side of the pressing plate 34. The pressing plate 34 and the baffle 31 are connected by a second detachable fastening component, and the second detachable fastening component can also be realized by bolts. In general, the second detachable fastening component is in a loose state, ensuring that the pressing plate 34 can slide along the guide groove 341, and ensuring that the fastening bolt 33 can drive the pressing plate 34 to move accurately. The end surface of the pressing plate 34 is provided with a rubber pad 35 for abutting against the cabinet door 2. The rubber pad 35 is provided to provide a buffer, which can further improve the stability of the cabinet door 2.

[0031] Example 2

[0032] Reference Figure 5-6 The wind turbine nacelle cabinet door fastening device of embodiment 1 improves the stability of the cabinet door 2 to a certain extent, and can keep the cabinet door 2 in a fastened state for a long period of time, thereby avoiding the wrong shutdown of the wind turbine. However, in the case of long-term operation, the fastening bolts 33 may also become loose, and when the fastening bolts 33 become loose, the problem of fastening failure may occur. Based on embodiment 1, this embodiment further improves the problem of loosening of the fastening bolts 33 after long-term operation.

[0033] Specifically, the cabinet door 2 is generally provided with a shutter 21 to achieve ventilation of the cabinet body 1, but the ventilation volume of the shutter 21 is limited, and on windy days, the wind pressure in the cabinet body 1 will fluctuate. In this embodiment, a detachable cover structure 4 is provided on the shutter 21, and a telescopic airbag 5 is still provided on the cabinet door 2. The telescopic airbag 5 is connected to the cover structure 4 through a pipeline, and a telescopic rod 6 is provided in the middle of the telescopic airbag 5. A ratchet pawl mechanism 7 is provided on the fastening bolt 33, and a transmission mechanism (not shown in the figure) for converting linear motion into rotational motion is provided between the telescopic rod 6 and the ratchet pawl, which is used to drive the rotation of the ratchet pawl mechanism 7, and the ratchet pawl mechanism 7 is used to drive the fastening bolt 33 to rotate in one direction. The wind blown out through the shutter 21 is collected by the cover structure 4, and then enters the telescopic airbag 5 through the pipeline, thereby expanding the telescopic airbag 5. During the expansion of the telescopic airbag 5, the telescopic rod 6 in the middle thereof will be driven to move. By configuring a ratchet pawl mechanism 7 on the fastening bolt 33 and connecting it with the telescopic rod 6 through a transmission mechanism, when the telescopic rod 6 moves, the fastening bolt 33 can be driven to rotate, thereby achieving the tightening of the fastening bolt 33. When the wind pressure is low, the telescopic airbag 5 can be naturally reset, and the telescopic rod 6 can be driven to move in the opposite direction during the reset process. Due to the one-way transmission characteristics of the ratchet pawl mechanism 7, the fastening bolt 33 can be reset without loosening, and further tightening can be achieved when waiting for the next high wind pressure.

[0034] The telescopic airbag 5 is made of elastic material, such as highly elastic rubber, or a coil spring is embedded in the rubber, so that it has a certain restoring force. Positioning components 51 are provided at both ends of the telescopic airbag 5, and a guide rail 8 is provided on the cabinet door 2. The positioning components 51 are arranged on the guide rail 8, and one of the positioning components 51 is fixedly arranged and the other positioning component 51 is slidably arranged. The slidably arranged positioning component 51 fixes the telescopic rod 6 and can drive the movement of the telescopic rod 6. A limit bolt is provided at the end of the telescopic rod 6 to limit its moving stroke.

[0035] The ratchet pawl mechanism 7 adopts an outer disc structure as shown in the figure to arrange the pawl, and the ratchet is arranged on the fastening bolt 33. When the outer disc structure rotates clockwise, the ratchet of the fastening bolt 33 can be driven to rotate through the pawl; when the outer disc structure rotates counterclockwise, no transmission is achieved.

[0036] A gear rack transmission mechanism may be used between the outer disc structure and the telescopic rod 6. For example, a rack is arranged on the telescopic rod 6 and a gear is arranged on the outer disc structure, so as to realize the transmission of linear motion and rotational motion.

[0037] The cover structure 4 is provided with an exhaust valve 41 to discharge the excess wind pressure and avoid damaging the telescopic airbag 5 .

Claims

1. A fastening device for a nacelle cabinet door of a wind turbine, wherein the nacelle cabinet comprises a cabinet body and a cabinet door, and the top of the cabinet body has at least two lifting ears for lifting the cabinet body, characterized in that: The cabin cabinet door fastening device includes a crossbeam, a baffle and a fastening bolt. One side of the crossbeam is provided with a bayonet portion that can be clamped on one side of the root of the lifting ear. The baffle adopts a sliding fitting structure that can move along the length direction of the crossbeam. The fastening bolt is threadedly matched with the baffle so that the movable end of the fastening bolt is abutted against the cabinet door. At the same time, the baffle can tighten the crossbeam and make the crossbeam clamped on the root of the lifting ear.

2. The wind turbine cabin cabinet door fastening device according to claim 1, characterized in that: The baffle adopts an L-shaped structure in cross section, one end of which is slidably matched with the crossbeam, and the other end is placed on the surface of the cabinet door.

3. The wind turbine cabin cabinet door fastening device according to claim 2, characterized in that: The crossbeam is provided with a slide groove, a pad is provided on one side of the slide groove, and the other side is the baffle, and the baffle and the pad are connected by a first detachable fastening component.

4. The wind turbine cabin cabinet door fastening device according to claim 2, characterized in that: The baffle adopts a U-shaped cross-section structure at one end of the cabinet door, and a pressure plate is also provided at the movable end of the fastening bolt. The pressure plate also adopts a U-shaped structure. The pressure plate and the baffle are fastened together by relative snap-fitting of the openings, and a guide structure is provided between the pressure plate and the baffle in a manner that moves along the fastening bolt.

5. The wind turbine cabin cabinet door fastening device according to claim 4, characterized in that: The guide structure is a guide groove arranged on the side of the pressure plate, and the pressure plate is connected to the baffle plate through a second detachable fastening component.

6. The wind turbine cabin cabinet door fastening device according to claim 4, characterized in that: The end surface of the pressing plate is provided with a rubber pad for abutting against the cabinet door.

7. The wind turbine cabin cabinet door fastening device according to any one of claims 1 to 6, characterized in that: The cabinet door is also provided with a shutter, and a detachable cover structure is provided on the shutter. The cabinet door is also provided with a telescopic airbag, and the telescopic airbag is connected to the cover structure through a pipeline. A telescopic rod is provided in the middle of the telescopic airbag, and a ratchet and pawl mechanism is provided on the fastening bolt. A transmission mechanism for converting linear motion into rotational motion is provided between the telescopic rod and the ratchet and pawl, which is used to drive the rotation of the ratchet and pawl mechanism. The ratchet and pawl mechanism is used to drive the fastening bolt to rotate in one direction.

8. The wind turbine cabin cabinet door fastening device according to claim 7, characterized in that: The cover structure is provided with an exhaust valve.

9. The wind turbine cabin cabinet door fastening device according to claim 7, characterized in that: The telescopic airbag is made of elastic material.

10. The wind turbine cabin cabinet door fastening device according to claim 7, characterized in that: Both ends of the telescopic airbag are provided with positioning components, and the cabinet door is provided with a guide rail. The positioning components are arranged on the guide rail, and one of the positioning components is fixedly arranged and the other positioning component is slidably arranged.

Images