Circular adjusting door device of centrifugal fan

Abstract

The utility model discloses a circular adjusting door device of a centrifugal fan, and relates to the technical field of adjusting door accessories, the circular adjusting door device comprises a barrel and a cylinder, a plurality of joints are symmetrically and fixedly mounted on the cylinder, blades are fixedly mounted on the joints, and a plurality of reinforcing columns fixedly mounted with the barrel are fixedly mounted on the cylinder. Under the matching action of the oil injection nozzles and the like, grease is added into the cavity through the oil injection nozzles on the outer wall of the rotating shaft sleeve, and the periphery of the rotating shaft is filled with the grease, so that the situation that the rotating shaft is stuck due to dust entering is effectively prevented, the lubricating and maintaining effects can be achieved, stable operation of the adjusting door is ensured, and the service life of the adjusting door is prolonged. The first baffle, the second baffle and the sealing ring are arranged at the top of the rotating shaft sleeve, so that the top of the rotating shaft sleeve where dust possibly enters can be thoroughly blocked, the sealing performance of the rotating shaft sleeve is greatly improved, lubricating grease is prevented from being lost, and a powerful guarantee is provided for stable operation of the adjusting door.

Description

Technical Field

[0001] This application relates to the technical field of regulating door fittings, and in particular to a circular regulating door device for a centrifugal ventilator. Background Art

[0002] The fan regulating door, also known as a petal-shaped air damper, is mainly used to regulate the output of the blower, that is, to control the wind force by adjusting the air volume at the outlet of the blower. The design of this regulating door makes it so that when the door is closed or partially closed, the air volume at the inlet of the fan decreases, and thus the air volume sent out at the outlet also decreases, and vice versa.

[0003] After retrieval, a patent with the Chinese patent authorization publication number CN202381372U discloses a circular regulating door device for a centrifugal ventilator, including a regulating door cylinder body with a handle, and regulating vanes inside the regulating door cylinder body. The key structural point is that the handle is connected to the rotating shaft of the regulating device through an electric actuator.

[0004] The circular regulating door device for a centrifugal ventilator in the above patent has the following deficiencies: Although the quality of the regulating door has been improved through structural transformation, its service life has been extended, and its regulating accuracy and regulating efficiency are higher. However, due to the presence of an interval inside the inner cavity of the regulating door rotating shaft sleeve, the sealing performance is not very good. As a result, in actual use, dust in the air easily mixes into it. After a long time, it is very easy to block the inner cavity, jam the rotating shaft, and ultimately cause the blades to rotate difficultly, seriously affecting the regulating efficiency and regulating accuracy of the regulating door. Summary of the Utility Model

[0005] The purpose of the present utility model is to solve or at least alleviate the problem that in actual use, dust in the air easily mixes into it. After a long time, it is very easy to block the inner cavity, jam the rotating shaft, and ultimately cause the blades to rotate difficultly, seriously affecting the regulating efficiency and regulating accuracy of the regulating door existing in the prior art.

[0006] To achieve the above purpose, the present utility model provides the following technical solution: A circular regulating door device for a centrifugal ventilator, including a cylinder body and a cylinder. A plurality of joints are symmetrically and fixedly installed on the cylinder, and a plurality of blades are fixedly installed on each of the joints. A plurality of strengthening columns for fixedly installing with the cylinder body are fixedly installed on the cylinder. A rotating shaft is fixedly installed inside the cylinder, a rotating shaft sleeve is sleeved on the rotating shaft, and the rotating shaft sleeve is fixedly connected to the cylinder. A cavity for storing grease is formed between the rotating shaft and the rotating shaft sleeve. An oil injection nozzle is provided on the rotating shaft sleeve, and a sealing plug is provided on the oil injection nozzle.

[0007] With the above technical solution, grease is added to the cavity through the grease nozzle on the outer wall of the rotating shaft sleeve, and the rotating shaft is filled with grease all around, thus effectively preventing the occurrence of the rotating shaft being stuck due to dust entering, and also playing a role in lubrication and maintenance, ensuring the stable operation of the regulating door.

[0008] Optionally, a first baffle is fixedly installed on the rotating shaft sleeve, an installation groove is formed on the first baffle, and a sealing ring is arranged in the installation groove.

[0009] With the above technical solution, the sealing ring can play a sealing role.

[0010] Optionally, a second baffle is detachably installed on the first baffle, and the first baffle and the second baffle are of the same size.

[0011] With the above technical solution, the first baffle and the second baffle can play an auxiliary installation role.

[0012] Optionally, a circular hole for the rotating shaft to be rotatably installed is formed on the second baffle.

[0013] With the above technical solution, the circular hole facilitates the rotational installation of the rotating shaft therein.

[0014] Optionally, insertion holes are formed on both the first baffle and the second baffle, and insertion posts are slidably installed in the two insertion holes, and the two insertion posts are of the same size.

[0015] With the above technical solution, the insertion posts can be slidably installed in the insertion holes by setting the insertion holes.

[0016] Optionally, two threads are symmetrically formed on both of the two insertion posts, and nuts are screwed on the two threads.

[0017] With the above technical solution, the two insertion posts are inserted into the corresponding insertion holes, and then the nuts are rotated to complete the fixed connection of the first baffle and the second baffle.

[0018] Optionally, anti-slip threads are provided on both of the two nuts, an arc-shaped block is provided on the cylinder body, and the arc-shaped block wraps one end of the rotating shaft.

[0019] With the above technical solution, the arc-shaped block can play a protective role.

[0020] In summary, the beneficial effects of the present application are as follows:

[0021] 1. In the present new application, with the cooperation of an oil injection nozzle and the like, grease is added into the cavity through the oil injection nozzle on the outer wall of the rotating shaft sleeve, and the periphery of the rotating shaft is filled with grease, thereby effectively preventing the occurrence of the situation where the rotating shaft is stuck due to dust entering. Moreover, it can also play a role in lubrication and maintenance, ensuring the stable operation of the regulating door. By providing a first baffle, a second baffle and a sealing ring at the top of the rotating shaft sleeve, the top of the rotating shaft sleeve where dust may enter can be completely blocked, greatly enhancing the sealing performance of the rotating shaft sleeve, preventing the loss of lubricating grease, and also providing a strong guarantee for the stable operation of the regulating door.

[0022] 2. In the present new application, with the cooperation of plug posts and the like, by placing the sealing ring in the installation groove, and then splicing the first baffle and the second baffle, at this time, the two plug posts can be inserted into the corresponding jacks, and then the nut is rotated to complete the fixed connection of the first baffle and the second baffle, and it is also convenient to replace the sealing ring in the later stage. Brief Description of the Drawings

[0023] Figure 1 is the overall schematic diagram of the present application;

[0024] Figure 2 is the schematic diagram of the rotating shaft sleeve of the present application;

[0025] Figure 3 is the schematic diagram of the first baffle of the present application;

[0026] Figure 4 is the schematic diagram of the sealing ring of the present application.

[0027] Description of the Reference Numerals in the Drawings: In the figure: 1, cylinder body; 2, cylinder; 3, joint; 4, blade; 5, strengthening column; 6, arc-shaped block; 7, rotating shaft; 8, rotating shaft sleeve; 9, oil injection nozzle; 10, sealing plug; 11, first baffle; 12, second baffle; 13, cavity; 14, plug post; 15, nut; 16, jack; 17, thread; 18, installation groove; 19, sealing ring; 20, circular hole. Detailed Description of the Embodiment

[0028] The following is a further detailed description of the present application in conjunction with the attached Figures 1-4 drawings.

[0029] Please refer to Figures 1-3, A circular regulating door device for a centrifugal ventilator, comprising a cylinder body 1 and a cylinder 2. A plurality of connectors 3 are symmetrically and fixedly installed on the cylinder 2. By setting the connectors 3, the auxiliary installation function can be achieved. A plurality of blades 4 are fixedly installed on the plurality of connectors 3. A plurality of reinforcing columns 5 for fixedly installing with the cylinder body 1 are fixedly installed on the cylinder 2. By setting the reinforcing columns 5, the function of strengthening the installation and fixation can be achieved. A rotating shaft 7 is fixedly installed inside the cylinder 2. A rotating shaft sleeve 8 is sleeved on the rotating shaft 7, and the rotating shaft sleeve 8 is fixedly connected with the cylinder 2. A cavity 13 for storing grease is formed between the rotating shaft 7 and the rotating shaft sleeve 8. An oil injection nozzle 9 is provided on the rotating shaft sleeve 8. By setting the oil injection nozzle 9, it is convenient to add grease into the cavity 13. A sealing plug 10 is provided on the oil injection nozzle 9.

[0030] During use, grease is added into the cavity 13 through the oil injection nozzle 9 on the outer wall of the rotating shaft sleeve 8, and the periphery of the rotating shaft 7 is filled with grease, thus effectively preventing the occurrence of the situation where the rotating shaft 7 is stuck due to dust entry, and it can also play a role in lubrication and maintenance, ensuring the stable operation of the regulating door.

[0031] Refer to Figure 3 and Figure 4 , A first baffle 11 is fixedly installed on the rotating shaft sleeve 8. An installation groove 18 is formed on the first baffle 11. A sealing ring 19 is provided in the installation groove 18. By setting the sealing ring 19, the sealing function can be achieved.

[0032] Refer to Figure 3 and Figure 4 , A second baffle 12 is detachably installed on the first baffle 11. The first baffle 11 and the second baffle 12 are of the same size. By setting the first baffle 11 and the second baffle 12, the auxiliary installation function can be achieved.

[0033] Refer to Figure 4 , A circular hole 20 for rotatably installing the rotating shaft 7 is formed on the second baffle 12. By setting the circular hole 20, it is convenient for the rotating shaft 7 to be rotatably installed inside.

[0034] Refer to Figure 3 and Figure 4 , Socket holes 16 are formed on both the first baffle 11 and the second baffle 12. Plug posts 14 are slidably installed in the two socket holes 16. The two plug posts 14 are of the same size. By setting the socket holes 16, the plug posts 14 can be slidably installed inside.

[0035] Refer to Figure 4 , Two threads 17 are symmetrically formed on both of the two plug posts 14. Nuts 15 are screwed on the two threads 17. By inserting the two plug posts 14 into the corresponding socket holes 16, and then rotating the nuts 15, the fixed connection between the first baffle 11 and the second baffle 12 is completed.

[0036] Refer toFigure 1 and Figure 4 Both of the two nuts 15 are provided with anti-slip threads, and the arc-shaped block 6 is provided on the cylinder 2, and the arc-shaped block 6 wraps one end of the rotating shaft 7 therein. By providing the arc-shaped block 6, a protective effect can be achieved.

[0037] The implementation principle of this application is as follows: During use, grease is added into the cavity 13 through the grease nozzle 9 on the outer wall of the rotating shaft sleeve 8, and the periphery of the rotating shaft 7 is filled with grease, thus effectively preventing the occurrence of the situation where the rotating shaft 7 is stuck due to dust entry, and it can also play a role in lubrication and maintenance, ensuring the stable operation of the adjusting door;

[0038] By placing the sealing ring 19 in the installation groove 18, and then splicing the first baffle 11 and the second baffle 12, at this time, the two plug posts 14 can be inserted into the corresponding jacks 16, and then the nut 15 is rotated to complete the fixed connection of the first baffle 11 and the second baffle 12;

[0039] By providing the first baffle 11, the second baffle 12 and the sealing ring 19 on the top of the rotating shaft sleeve 8, the top of the rotating shaft sleeve 8 that may enter dust can be completely blocked, greatly enhancing the sealing performance of the rotating shaft sleeve 8, preventing the loss of lubricating grease, and also providing a strong guarantee for the stable operation of the adjusting door.

[0040] The above are all the preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of this application should be covered within the protection scope of this application.

Claims

1. A circular regulating door device for a centrifugal fan, comprising a barrel (1) and a cylindrical body (2), wherein a plurality of joints (3) are symmetrically fixedly mounted on the cylindrical body (2), blades (4) are fixedly mounted on each of the plurality of joints (3), and a plurality of reinforcing columns (5) are fixedly mounted on the cylindrical body (2) and are fixedly mounted on the barrel (1), characterized in that: A rotating shaft (7) is fixedly mounted in the cylindrical body (2); a rotating shaft sleeve (8) is sleeved on the rotating shaft (7); the rotating shaft sleeve (8) is fixedly connected to the cylindrical body (2); a cavity (13) for storing butter is formed between the rotating shaft (7) and the rotating shaft sleeve (8); a grease injection nozzle (9) is provided on the rotating shaft sleeve (8); and a sealing plug (10) is provided on the grease injection nozzle (9).

2. A circular regulating door device for a centrifugal fan according to claim 1, characterized in that: A first baffle (11) is fixedly mounted on the rotating shaft sleeve (8), a mounting groove (18) is formed on the first baffle (11), and a sealing ring (19) is disposed in the mounting groove (18).

3. A circular regulating door device for a centrifugal fan according to claim 2, characterized in that: A second baffle (12) is detachably mounted on the first baffle (11); the first baffle (11) and the second baffle (12) are of the same size.

4. A circular regulating door device for a centrifugal fan according to claim 3, characterized in that: The second baffle (12) is provided with a circular hole (20) for rotatably mounting the rotating shaft (7).

5. A circular regulating door device for a centrifugal fan according to claim 4, characterized in that: The first baffle plate (11) and the second baffle plate (12) are both provided with an insertion hole (16), and an insertion column (14) is slidably installed in the two insertion holes (16), and the two insertion columns (14) are of the same size.

6. A circular regulating door device for a centrifugal fan according to claim 5, characterized in that: The two plug posts (14) are symmetrically provided with two threads (17), and the two threads (17) are both threaded with nuts (15).

7. A circular regulating door device for a centrifugal fan according to claim 6, characterized in that: The two nuts (15) are both provided with anti-slip threads, and the cylindrical body (2) is provided with an arc block (6), and the arc block (6) wraps one end of the rotating shaft (7) therein.

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