A dust removal device for a wind turbine nacelle

Abstract

This application provides a dust removal device for a wind turbine nacelle, relating to the field of dust removal devices. It includes: a spray gun body; and a feed nozzle disposed on the spray gun body and communicating with the discharge port of the spray gun body. This application utilizes a unique structure incorporating an elastic ring, a tightening ring, and a drive ring. When the dry ice delivery pipe is inserted, the elastic ring, in conjunction with other components, causes the tightening ring to open for easy insertion. After insertion, the elastic ring resets and pushes the drive ring, causing the tightening ring to clamp the pipe, ensuring a stable connection. Simultaneously, the elastic protrusions on the elastic ring enhance the seal, prevent the pipe from guiding the dry ice delivery, and the threaded spring assists the reciprocating motion of the elastic ring. Overall, this achieves a stable connection, reliable sealing, and convenient operation of the dry ice delivery pipe, improving dust removal effect and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of dust removal devices, and more specifically, to a dust removal device for a fan nacelle. Background Technology

[0002] During the operation of wind turbine generators, the nacelle generates a large amount of heat due to the operation of equipment such as gearboxes and generators, requiring the continuous introduction of outside air for heat dissipation through the ventilation system. However, impurities such as dust, salt spray, and insect debris in the air easily accumulate on dust filters, heat sinks, and equipment surfaces, leading to reduced ventilation efficiency, overheating, and even equipment malfunctions. Traditional dust removal methods often employ mechanical rapping or high-pressure air guns, but these methods suffer from incomplete cleaning and potential damage to precision components. In recent years, dry ice cleaning technology has been widely used in the field of power equipment maintenance due to its advantages such as non-contact cleaning, no secondary pollution, and high energy efficiency. This technology uses compressed air to propel dry ice particles at high speed onto the surface to be cleaned. Utilizing the low-temperature embrittlement of dirt and the volume expansion effect generated by dry ice sublimation, dirt is removed. It is particularly suitable for cleaning complex structures such as honeycomb electrodes and slits, and the sublimation of dry ice only produces carbon dioxide gas, meeting environmental protection requirements.

[0003] During dry ice blasting, the temperature inside the pipe drops rapidly to below -80°C, causing uneven contraction and deformation of the metal spray gun tube and mounting base due to the difference in their coefficients of thermal expansion. This deformation leads to a non-linear change in the threaded fit clearance, requiring a torque far exceeding the design value to overcome the engagement resistance during disassembly. In extreme cases, the metal's brittleness effect can cause the threads to seize, making it impossible to separate the spray gun tube from the supply pipe. This not only forces maintenance personnel to use destructive disassembly methods but also risks pipe breakage or seal failure due to forced operation, seriously threatening equipment safety and maintenance efficiency.

[0004] Therefore, we have made improvements to this and proposed a dust removal device for the wind turbine nacelle. Utility Model Content

[0005] In order to achieve the above-mentioned objectives, this utility model provides a dust removal device for a wind turbine nacelle to improve the aforementioned problems.

[0006] The application is as follows:

[0007] include:

[0008] Spray gun body;

[0009] The feed nozzle is disposed on the body of the spray gun and communicates with the discharge port of the spray gun body;

[0010] An elastic ring is elastically disposed on the feed nozzle;

[0011] A limiting rod, disposed on the spray gun body and extending towards the elastic circumferential side, wherein its extended end is rolled back to form an annular cavity, comprising:

[0012] The ball bearings are housed within the annular cavity.

[0013] A tightening ring, disposed in each of the annular cavities and located between the free end of the limiting rod and the ball bearing, has the following characteristics:

[0014] The inclined surface is formed on the surface adjacent to the tightening ring and the ball, and moves towards the center of the tightening ring under the pressure of the ball.

[0015] A drive ring is disposed in each of the annular cavities and is located on the opposite side of the tightening ring, separated by balls;

[0016] A connecting rod is disposed between the elastic ring and the drive ring;

[0017] When the dry ice delivery tube squeezes and releases the elastic ring, the elastic ring squeezes the drive ring through the connecting rod, pushing the ball bearings to the inclined plane and causing the tightening ring to move in the direction of squeezing the dry ice delivery tube.

[0018] Preferably, the elastic ring has multiple circumferentially distributed elastic protrusions on its ring wall, and the elastic protrusions protrude toward the axis of the feed nozzle.

[0019] Preferably, the inner wall of the drive ring has an annular groove, and a sealing ring is provided in the annular groove.

[0020] Preferred options also include:

[0021] A barrier tube is disposed on the feed nozzle and located within the inner ring of the elastic ring, and the diameter of the dry ice delivery tube is larger than the diameter of the barrier tube.

[0022] Preferably, a threaded spring is provided between the elastic ring and the spray gun body, so that the elastic ring can block the reciprocating motion of the tube axis.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] In the scheme of this application:

[0025] To address the problems of loose connections and leaks in dry ice delivery pipes during dust removal in wind turbine nacelles, as well as the cumbersome operation that affects dust removal efficiency, this application employs a unique structure incorporating an elastic ring, a tightening ring, and a drive ring. When the dry ice delivery pipe is inserted, the elastic ring, in conjunction with other components, opens the tightening ring for easy insertion. Once inserted, the elastic ring resets, pushing the drive ring to clamp the pipe, ensuring a stable connection. Simultaneously, the elastic protrusions on the elastic ring enhance the seal, guide the dry ice delivery through the obstruction pipe, and the threaded spring assists the reciprocating motion of the elastic ring. Overall, this design achieves a stable connection, reliable sealing, and convenient operation for the dry ice delivery pipe, improving dust removal effect and efficiency. Attached Figure Description

[0026] Figure 1 One of the schematic diagrams illustrating the connection relationship between the spray gun and the conveying pipeline of a dust removal device for a wind turbine nacelle provided in this application;

[0027] Figure 2 A schematic diagram of a dust removal device for a wind turbine nacelle provided in this application;

[0028] Figure 3 A second schematic diagram illustrating the connection relationship between the spray gun and the conveying pipeline of a dust removal device for a wind turbine nacelle provided in this application;

[0029] Figure 4 An enlarged view of section A of a dust removal device for a wind turbine nacelle provided in this application.

[0030] The image shows:

[0031] 1. Spray gun body; 2. Feed nozzle; 3. Elastic ring; 31. Barrier tube; 4. Limiting rod; 41. Ball bearing; 5. Tightening ring; 51. Inclined surface; 6. Drive ring; 61. Connecting rod. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0033] For an example, please refer to... Figure 1 , Figure 2 , Figure 3 and Figure 4 A dust removal device for a wind turbine nacelle, comprising:

[0034] Spray gun body 1;

[0035] The feed nozzle 2 is installed on the spray gun body 1 and is connected to the discharge port of the spray gun body 1;

[0036] The elastic ring 3 is elastically set on the feed nozzle 2;

[0037] Limiting rod 4 is disposed on the spray gun body 1 and extends towards the periphery of elastic ring 3. Its extended end is rolled back to form an annular cavity, comprising:

[0038] Ball bearing 41 is disposed in the annular cavity;

[0039] The tightening ring 5 is disposed in each annular cavity and located between the free end of the limiting rod 4 and the ball 41, and has the following characteristics:

[0040] The inclined surface 51 is formed on the adjacent surface of the tightening ring 5 and the ball 41, and moves towards the center of the tightening ring 5 under the pressure of the ball 41.

[0041] The drive ring 6 is disposed in each annular cavity and is located on the opposite side of the tightening ring 5, separated by the ball bearing 41.

[0042] Connecting rod 61 is disposed between elastic ring 3 and drive ring 6;

[0043] When the dry ice delivery tube squeezes and releases the elastic ring 3, the elastic ring 3 squeezes the drive ring 6 through the connecting rod 61, pushing the ball 41 to the inclined surface 51, causing the tightening ring 5 to move in the direction of squeezing the dry ice delivery tube.

[0044] When connecting a dry ice delivery tube, the operator must manually squeeze the elastic ring 3 inward before inserting the tube. This action directly pulls the connected drive ring 6 via the connecting rod 61, causing it to move away from the ball bearing 41 within the annular cavity of the limiting rod 4. The retraction of the drive ring 6 releases the lateral pressure on the ball bearing 41, allowing it to relax within the annular cavity. Since the ball bearing 41 is no longer tightly pressed against the inclined surface 51 of the tightening ring 5 (it should be noted that the limiting rod 4 has a groove restricting the path of the ball bearing 41), the inclined surface 51 loses its wedging force, and the inner diameter of the tightening ring 5 increases accordingly, losing its pre-tightening force on the pipe and entering an "open" or relaxed state, thus facilitating smooth pipe insertion.

[0045] The operator then inserts the dry ice delivery tube axially. The tube first passes easily through the relaxed tightening ring 5. The end of the tube continues forward, directly contacting and pressing the elastic ring 3, which has been manually moved into place. The elastic ring 3 undergoes elastic deformation, causing the previously obscured barrier tube 31 to move and be exposed, precisely positioned at the critical connection point between the end of the dry ice delivery tube and the outlet of the spray gun body 1. This exposure and positioning of the barrier tube 31 ensures that the dry ice material or airflow enters the spray gun body 1 correctly and controllably.

[0046] Once the pipe is inserted and the barrier tube 31 is exposed and positioned, the operator releases the initial manual force used to actuate the elastic ring 3. At this point, the elastic ring 3, due to its inherent elasticity, begins to automatically reset towards its center. This reset motion, via the connecting rod 61, pushes the drive ring 6 towards the ball 41 within the annular cavity. The drive ring 6 forcefully compresses the ball 41, forcing it to roll along the inclined surface 51 of the tightening ring 5 within the annular cavity. The geometry of the inclined surface 51 converts the radial pressure of the ball 41 into an axial component that forces the tightening ring 5 to move towards its own center. The tightening ring 5 is thus powerfully driven, moving towards the outer wall of the dry ice delivery pipe and applying a significant radial clamping force. This clamping force maintains the compressive force on the elastic ring 3, ensuring that the clamping force is maintained while the dry ice is blocked by the barrier tube 31 during dry ice transport, preventing the dry ice delivery pipe from detaching and facilitating removal after transport.

[0047] The elastic ring 3 has multiple circumferentially distributed elastic protrusions on its ring wall. The elastic protrusions protrude towards the axis of the feed nozzle 2, so that the elastic protrusions can better contact the components inside the feed nozzle 2, enhance the sealing effect, and prevent material leakage.

[0048] The inner wall of the drive ring 6 is provided with an annular groove, and a sealing ring is provided in the annular groove. The sealing ring can effectively prevent the medium leakage between the drive ring 6 and adjacent components, and ensure the stability and safety of the equipment operation.

[0049] Also includes:

[0050] The barrier tube 31 is set on the feed nozzle 2 and located in the inner ring of the elastic ring 3. The diameter of the dry ice conveying tube is larger than the diameter of the barrier tube 31. The barrier tube 31 can guide and restrict the dry ice conveying to a certain extent, so as to prevent the dry ice from deviating during the conveying process. At the same time, its diameter is smaller than that of the dry ice conveying tube, so that the dry ice can pass through smoothly.

[0051] A threaded spring is provided between the elastic ring 3 and the spray gun body 1, so that the elastic ring 3 can reciprocate along the axis of the blocking tube 31.

[0052] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A dust removal device for a fan engine room, characterized by, include: Spray gun body; The feed nozzle is disposed on the body of the spray gun and communicates with the discharge port of the spray gun body; An elastic ring is elastically disposed on the feed nozzle; A limiting rod, disposed on the spray gun body and extending towards the elastic circumferential side, wherein its extended end is rolled back to form an annular cavity, comprising: The ball bearings are housed within the annular cavity. A tightening ring, disposed in each of the annular cavities and located between the free end of the limiting rod and the ball bearing, has the following characteristics: The inclined surface is formed on the surface adjacent to the tightening ring and the ball, and moves towards the center of the tightening ring under the pressure of the ball. A drive ring is disposed in each of the annular cavities and is located on the opposite side of the tightening ring, separated by balls; A connecting rod is disposed between the elastic ring and the drive ring; When the dry ice delivery tube squeezes and releases the elastic ring, the elastic ring squeezes the drive ring through the connecting rod, pushing the ball bearings to the inclined plane and causing the tightening ring to move in the direction of squeezing the dry ice delivery tube.

2. The fan nacelle dust extraction device of claim 1, wherein, The elastic ring has multiple circumferentially distributed elastic protrusions on its ring wall, and the elastic protrusions protrude toward the axis of the feed nozzle.

3. The dust removal device for a fan engine room according to claim 2, characterized in that, The inner wall of the drive ring is provided with an annular groove, and a sealing ring is provided in the annular groove.

4. A dust removal device for a fan nacelle according to claim 3, characterized in that, Also includes: A barrier tube is disposed on the feed nozzle and located within the inner ring of the elastic ring, and the diameter of the dry ice delivery tube is larger than the diameter of the barrier tube.

5. A dust removal device for a fan engine room according to claim 4, characterized in that, A threaded spring is provided between the elastic ring and the spray gun body, so that the elastic ring can block the reciprocating motion of the tube axis.

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