Filter screen assembly and wind generating set

Abstract

The utility model discloses a filter screen assembly and wind generating set relates to wind power generation technical field, the filter screen assembly includes frame, a pair of reel, differential pressure transducer and drive unit, the pair of reel is distributed along the length direction of frame at interval on the both sides of frame, each reel extends along the width direction of frame, and the differential pressure transducer is connected with the drive unit. The rotating shaft is rotationally connected with the frame; the filter screen is stretched on the frame, and two ends of the filter screen are respectively wound on the pair of reels; the pressure difference sensor is arranged on the frame and used for detecting the pressure difference of the two sides of the filter screen; the driving unit is arranged on the frame and used for driving the pair of reels to rotate synchronously; according to the technical scheme provided by the utility model, the technical effects that the filter screen can be automatically replaced in time, time and labor are saved, and cabin equipment damage caused by blockage of the filter screen can be effectively avoided can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power generation, and particularly relates to a filter screen assembly and a wind turbine generator set. Background Art

[0002] A filter screen is usually arranged at the air inlet of the nacelle of a wind turbine generator set to isolate dust in the external environment. However, after long-term use, impurities will adhere to the surface of the filter screen, and it needs to be replaced to ensure the ventilation effect. In the prior art, the replacement of the filter screen is usually manually carried out by staff after a certain period of use, which has the problems of time-consuming, laborious, and untimely replacement, and may cause damage to the nacelle equipment due to the blockage of the filter screen. Summary of the Utility Model

[0003] The main purpose of the utility model is to propose a filter screen assembly and a wind turbine generator set, aiming to solve the problems of time-consuming, laborious, and untimely replacement of the filter screen in the prior art.

[0004] To achieve the above object, the filter screen assembly proposed by the utility model includes:

[0005] A frame;

[0006] A pair of reels, which are arranged on both sides of the frame at intervals along the length direction of the frame, each reel extends along the width direction of the frame and is rotatably connected to the frame;

[0007] A filter screen, which is stretched on the frame, and both ends are respectively wound around a pair of reels;

[0008] A differential pressure sensor, which is arranged on the frame to detect the differential pressure on both sides of the filter screen; and,

[0009] A driving unit, which is arranged on the frame to drive a pair of reels to rotate synchronously.

[0010] In an embodiment, the driving unit includes a motor and a transmission mechanism, an output shaft of the motor is connected to one of the reels, and is in transmission connection with the other reel through the transmission mechanism.

[0011] In one embodiment, the transmission mechanism includes a transmission shaft, a first bevel gear, a second bevel gear, a third bevel gear, and a fourth bevel gear; the transmission shaft extends along the length direction of the frame and is rotatably installed on the frame; the first bevel gear is fixedly sleeved on the output shaft of the motor, the second bevel gear is fixedly sleeved on one end of the transmission shaft, and the second bevel gear meshes with the first bevel gear; the third bevel gear is fixedly sleeved on the other end of the transmission shaft, the fourth bevel gear is fixedly sleeved on the other reel, and the fourth bevel gear meshes with the third bevel gear.

[0012] In one embodiment, the filter screen assembly further includes a brush, the brush is arranged on the frame and is located on one side of the filter screen, the brush contacts the filter screen to clean the filter screen.

[0013] In one embodiment, the brush is arranged close to one of the reels; and / or,

[0014] The brush extends along the width direction of the frame.

[0015] In one embodiment, the filter screen assembly further includes a purging unit, the purging unit includes an air knife, the air knife is arranged on the frame, and the air outlet of the air knife faces the filter screen to purge the filter screen.

[0016] In one embodiment, the purging unit further includes an air pump, the air pump is arranged on the frame, and the air pump is communicated with the air knife through a pipeline.

[0017] In one embodiment, the air knife is arranged close to one of the reels; and / or,

[0018] The air knife extends along the width direction of the frame.

[0019] In one embodiment, the filter screen assembly further includes a purging unit, the purging unit includes an air knife; the brush is arranged close to one of the reels, and the air knife is located between the brush and one of the reels.

[0020] The present utility model further provides a wind power generating set, including:

[0021] A nacelle; and,

[0022] The above-mentioned filter screen assembly, and the filter screen assembly is installed at the air inlet of the nacelle.

[0023] The technical solution of the present utility model detects the pressure difference on both sides of the part of the filter screen located inside the frame through the pressure difference sensor. When the detected pressure difference value is lower than the preset threshold, the driving unit is used to drive a pair of the reels to rotate synchronously, and move the clean part of the filter screen to the inside of the frame to replace the filter screen; thus, the filter screen can be automatically replaced in a timely manner, saving time and effort, and effectively avoiding damage to the cabin equipment caused by the blockage of the filter screen. Brief Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0025] Figure 1 It is a schematic structural diagram of an embodiment of the filter screen assembly provided by the present utility model.

[0026] Explanation of the Reference Numerals in the Drawings:

[0027] 100, filter screen assembly; 1, frame; 2, reel; 3, filter screen; 4, pressure difference sensor; 5, driving unit; 51, motor; 52, transmission shaft; 53, first bevel gear; 54, second bevel gear; 55, third bevel gear; 56, fourth bevel gear; 6, brush; 7, purging unit; 71, air knife; 72, air pump; 73, pipeline.

[0028] The realization of the purpose, functional features and advantages of the present utility model will be further described in conjunction with the embodiments and with reference to the drawings. Detailed Embodiments

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present utility model belong to the scope of protection of the present utility model.

[0030] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0031] In addition, if the descriptions such as "first" and "second" are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0032] In a wind turbine generator nacelle, a filter screen is usually provided at the air inlet to isolate dust in the external environment. However, after long-term use, impurities will adhere to the surface of the filter screen and need to be replaced to ensure the ventilation effect. In the prior art, the replacement of the filter screen is usually manually performed by staff after a certain period of use, which is time-consuming and laborious, and the replacement is not timely. It may cause damage to the nacelle equipment due to the blockage of the filter screen.

[0033] The present utility model provides a filter screen assembly, which can automatically replace the filter screen in a timely manner, saving time and effort, and can effectively avoid damage to the nacelle equipment caused by the blockage of the filter screen. Figure 1 FIG. is a schematic structural diagram of an embodiment of the filter screen assembly provided by the present utility model.

[0034] Please refer to Figure 1 , in an embodiment of the present utility model, the filter screen assembly 100 includes a frame 1, a pair of reels 2, a differential pressure sensor 4, and a driving unit 5. The pair of reels 2 are disposed on both sides of the frame 1 at intervals along the length direction of the frame 1 (as shown in Figure 1 , the left-right direction is the length direction of the frame 1), and each reel 2 extends along the width direction of the frame 1 (as shown in Figure 1 , the up-down direction is the length direction of the frame 1), and is rotatably connected to the frame 1; the filter screen 3 is disposed on the frame 1, and both ends are respectively wound around the pair of reels 2; the differential pressure sensor 4 is disposed on the frame 1 to detect the differential pressure on both sides of the filter screen 3; the driving unit 5 is disposed on the frame 1 to drive the pair of reels 2 to rotate synchronously.

[0035] The technical solution of the present utility model detects the pressure difference between both sides of the part of the filter screen 3 located inside the frame 1 through the pressure difference sensor 4. When the detected pressure difference value is lower than the preset threshold, the driving unit 5 is used to drive a pair of the reels 2 to rotate synchronously, and move the clean part of the filter screen 3 to the inside of the frame 1 to replace the filter screen 3; thus, the filter screen 3 can be automatically replaced in time, saving time and effort, and effectively avoiding damage to the cabin equipment caused by the blockage of the filter screen 3.

[0036] It can be understood that the filter screen assembly 100 may further include a controller, which is respectively connected to the pressure difference sensor 4 and the driving unit 5. The controller obtains the pressure difference value detected by the pressure difference sensor 4. When the detected pressure difference value is lower than the preset threshold, the controller controls the driving unit 5 to rotate to replace the filter screen 3, with simple operation and convenient control; both sides of the filter screen 3 refer to both sides in the thickness direction of the filter screen 3 (as Figure 1 shown, the front-back direction is the thickness direction of the filter screen 3). When the detected pressure difference value is lower than the preset threshold, it indicates that there is more dust deposited on the filter screen 3, affecting the ventilation effect; the driving unit 5 may include two motors 51, and the two motors 51 are arranged corresponding to a pair of reels 2, and the output shaft of each motor 51 is connected to the corresponding reel 2 to drive a pair of reels 2 to rotate synchronously. The driving unit 5 may also include a motor 51 and a transmission mechanism. The output shaft of the motor 51 is connected to one of the reels 2, and the transmission mechanism is arranged on a pair of reels 2 to make a pair of reels 2 rotate synchronously.

[0037] In an embodiment of the present utility model, the driving unit 5 includes a motor 51 and a transmission mechanism. The output shaft of the motor 51 is connected to one of the reels 2 and is in transmission connection with the other reel 2 through the transmission mechanism. The output shaft of the motor 51 is connected to one of the reels 2 and is in transmission connection with the other reel 2 through the transmission mechanism, which can realize the synchronous rotation of a pair of reels 2 through one motor 51 and is also beneficial to ensuring the synchronousness of rotation. It can be understood that the transmission mechanism may be a chain transmission mechanism, a belt transmission mechanism or a worm and worm gear transmission mechanism, etc.

[0038] In an embodiment of the utility model, the transmission mechanism includes a transmission shaft 52, a first bevel gear 53, a second bevel gear 54, a third bevel gear 55 and a fourth bevel gear 56; the transmission shaft 52 extends along the length direction of the frame 1 and is rotatably mounted on the frame 1; the first bevel gear 53 is fixedly sleeved on the output shaft of the motor 51, the second bevel gear 54 is fixedly sleeved on one end of the transmission shaft 52, and the second bevel gear 54 is meshed with the first bevel gear 53; the third bevel gear 55 is fixedly sleeved on the other end of the transmission shaft 52, the fourth bevel gear 56 is fixedly sleeved on the other reel 2, and the fourth bevel gear 56 is meshed with the third bevel gear 55. The output shaft of the motor 51 rotates to drive one of the reels 2 to rotate. At the same time, the rotation of the output shaft of the motor 51 drives the transmission shaft 52 to rotate through the meshing action of the first bevel gear 53 and the second bevel gear 54. The rotation of the transmission shaft 52 drives the other reel 2 to rotate through the meshing action of the third bevel gear 55 and the fourth bevel gear 56. Through the cooperation of the transmission shaft 52 and multiple bevel gears, the output shaft of the motor 51 is connected to the other reel 2 in transmission, so that the synchronous rotation of a pair of reels 2 can be achieved through one motor 51, and the rotation synchronization is good and the stability is also good.

[0039] In the embodiment of the utility model, the filter assembly 100 further includes a brush 6, which is disposed on the frame 1 and located on one side of the filter 3. The brush 6 contacts the filter 3 to clean the filter 3. When the drive unit 5 drives a pair of reels 2 to rotate to replace the filter 3 in the frame 1, the used part of the filter 3 moves relative to the brush 6 along the length direction of the frame 1, so that the brush 6 cleans the filter 3, realizing self-cleaning of the filter 3. The cleaned filter 3 is wound on the reel 2 and can be reused, which is conducive to cost saving.

[0040] In the embodiment of the utility model, the brush 6 is arranged close to one of the reels 2. The brush 6 is arranged close to the frame 1, which can effectively reduce the impact on the ventilation effect while achieving the purpose of cleaning the filter screen 3.

[0041] In the embodiment of the utility model, the brush 6 extends along the width direction of the frame 1. The brush 6 is arranged in a long strip shape, which can improve the cleaning effect and facilitate the movement of the filter 3; optionally, the two ends of the brush 6 along the width direction of the frame 1 are located outside the filter 3, and the brush 6 covers the filter 3 in the width direction of the frame 1, which can improve the cleaning effect.

[0042] In an embodiment of the present utility model, the brush 6 is disposed close to one of the reels 2, and the brush 6 extends along the width direction of the frame 1. While improving the cleaning effect, the brush 6 can effectively reduce the impact on the ventilation effect and also facilitate the movement of the filter net 3.

[0043] In an embodiment of the present utility model, the filter net assembly 100 further includes a purging unit 7. The purging unit 7 includes an air knife 71. The air knife 71 is disposed on the frame 1, and the air outlet of the air knife 71 faces the filter net 3 for purging the filter net 3. When the driving unit 5 drives a pair of reels 2 to rotate to replace the filter net 3 in the frame 1, the air outlet of the air knife 71 blows out air flow towards the filter net 3 to purge the filter net 3, realizing self-cleaning of the filter net 3. The purged filter net 3 is wound around the reel 2 and can be reused, which is beneficial to cost saving.

[0044] In an embodiment of the present utility model, the filter net assembly 100 further includes a brush 6. The brush 6 is disposed on the frame 1 and is located on one side of the filter net 3. The brush 6 contacts the filter net 3 for cleaning the filter net 3. The filter net assembly 100 further includes a purging unit 7. The purging unit 7 includes an air knife 71. The air knife 71 is disposed on the frame 1, and the air outlet of the air knife 71 faces the filter net 3 for purging the filter net 3. By using the brush 6 and the air knife 71 to clean and purge the filter net 3, secondary cleaning is realized, which can further improve the cleaning effect.

[0045] In an embodiment of the present utility model, the purging unit 7 further includes an air pump 72. The air pump 72 is disposed on the frame 1, and the air pump 72 is connected to the air knife 71 through a pipeline 73. By supplying air to the air knife 71 through the air pump 72, the air knife 71 can blow out a stable air flow, which is beneficial to ensuring the cleaning effect.

[0046] In an embodiment of the present utility model, the air knife 71 is disposed close to one of the reels 2. The air knife is disposed close to the frame 1. While achieving the purpose of purging the filter net 3, it can effectively reduce the impact on the ventilation effect.

[0047] In an embodiment of the present utility model, the air knife 71 extends along the width direction of the frame 1. The air knife 71 is arranged in a long strip shape, which can improve the cleaning effect. Optionally, both ends of the air knife 71 along the width direction of the frame 1 are located outside the filter net 3, and the air knife 71 covers the filter net 3 in the width direction of the frame 1, which can improve the cleaning effect.

[0048] In an embodiment of the present utility model, the air knife 71 is disposed close to one of the reels 2; the air knife 71 extends along the width direction of the frame 1. While improving the cleaning effect, the air knife 71 can effectively reduce the impact on the ventilation effect.

[0049] In an embodiment of the present utility model, the filter screen assembly 100 further includes a brush 6 and a purging unit 7, and the purging unit 7 includes an air knife 71; the brush 6 is disposed close to one of the reels 2, and the air knife 71 is located between the brush 6 and one of the reels 2. When the filter screen 3 moves towards one of the reels 2, it is first cleaned by the brush 6 and then purged by the air knife 71, which can further improve the cleaning effect. It can be understood that, further, the brush 6 and the air knife 71 are located on both sides of the filter screen 3, and the dust cleaned and purged falls on the same side of the filter screen 3, which can achieve the purpose of self-cleaning of the filter screen 3 while ensuring the filtering effect of the filter screen 3.

[0050] The present utility model further provides a wind power generating set, which includes a nacelle and a filter screen assembly 100. The specific structure of the filter screen assembly 100 refers to the above embodiments. Since the wind power generating set adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated herein one by one. Among them, the filter screen assembly 100 is installed at the air inlet of the nacelle. It can be understood that the filter screen 3 of the filter screen assembly 100 covers the air inlet of the nacelle to ensure the filtering effect; when the filter screen assembly 100 includes a brush 6, the brush 6 is located outside the nacelle, and the dust cleaned by the brush 6 will directly fall outside the nacelle; when the filter screen assembly 100 includes an air knife 71, the air knife 71 is located inside the nacelle, and at this time, the air outlet of the air knife 71 faces the outside of the nacelle, and the air knife 71 will purge the dust on the filter screen 3 towards the outside of the nacelle, which can effectively prevent dust from entering the nacelle and affecting the nacelle equipment.

[0051] The above description is only an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A filter screen assembly, characterized in that, Comprising: A frame (1); A pair of reels (2), disposed on both sides of the frame (1) at intervals along the length direction of the frame (1), each reel (2) extends along the width direction of the frame (1) and is rotatably connected to the frame (1); A filter screen (3), stretched on the frame (1), and both ends are respectively wound around a pair of the reels (2); A differential pressure sensor (4), disposed on the frame (1) for detecting the differential pressure on both sides of the filter screen (3); And, A driving unit (5), disposed on the frame (1) for driving the pair of reels (2) to rotate synchronously.

2. The filter screen assembly according to claim 1, wherein The driving unit (5) includes a motor (51) and a transmission mechanism, the output shaft of the motor (51) is connected to one of the reels (2), and is in transmission connection with the other reel (2) through the transmission mechanism.

3. The filter screen assembly according to claim 2, characterized in that, The transmission mechanism includes a transmission shaft (52), a first bevel gear (53), a second bevel gear (54), a third bevel gear (55) and a fourth bevel gear (56); the transmission shaft (52) extends along the length direction of the frame (1) and is rotatably installed on the frame (1); the first bevel gear (53) is fixedly sleeved on the output shaft of the motor (51), the second bevel gear (54) is fixedly sleeved on one end of the transmission shaft (52), and the second bevel gear (54) meshes with the first bevel gear (53); the third bevel gear (55) is fixedly sleeved on the other end of the transmission shaft (52), the fourth bevel gear (56) is fixedly sleeved on the other reel (2), and the fourth bevel gear (56) meshes with the third bevel gear (55).

4. The filter screen assembly according to claim 1, wherein, The filter screen assembly (100) further includes a brush (6), the brush (6) is disposed on the frame (1) and is located on one side of the filter screen (3), the brush (6) contacts the filter screen (3) for cleaning the filter screen (3).

5. The filter screen assembly according to claim 4, characterized in that, The brush (6) is disposed close to one of the reels (2); and / or, The brush (6) extends along the width direction of the frame (1).

6. The filter screen assembly according to claim 1 or 4, characterized in that The filter screen assembly (100) further includes a purging unit (7), the purging unit (7) includes an air knife (71), the air knife (71) is disposed on the frame (1), and the air outlet of the air knife (71) faces the filter screen (3) for purging the filter screen (3).

7. The filter screen assembly according to claim 6, wherein The purging unit (7) further includes an air pump (72), the air pump (72) is disposed on the frame (1), and the air pump (72) is communicated with the air knife (71) through a pipeline (73).

8. The filter screen assembly according to claim 6, wherein The air knife (71) is disposed close to one of the reels (2); and / or, The air knife (71) extends along the width direction of the frame (1).

9. The filter screen assembly according to claim 4, wherein, The filter screen assembly (100) further includes a purging unit (7), the purging unit (7) includes an air knife (71); the brush (6) is disposed close to one of the reels (2), and the air knife (71) is located between the brush (6) and one of the reels (2).

10. A wind turbine generator, characterized in that, Comprising: Cabin; And A filter screen assembly (100) as described in any one of claims 1 to 9, the filter screen assembly (100) being installed at the air inlet of the cabin.

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