Round adjusting door with eccentric blades

Abstract

The utility model relates to the technical field of fans, and discloses a circular adjusting door adopting eccentric blades, which comprises an air duct, a conical core body is arranged in the middle of the inside of the air duct, first rotating shafts are fixedly mounted at the top and the bottom of the conical core body, and rotating shaft sleeves are fixedly mounted at the top and the bottom of the air duct. Second rotating shafts extending into the air duct are rotationally inserted into the two rotating shaft sleeves, connecting rods are fixedly connected between the two first rotating shafts and the corresponding second rotating shafts, the two connecting rods are fixedly sleeved with blades, the blades are of eccentric structures, and the included angle, located on the right sides of the connecting rods, of the blades is set to be beta, and the included angle of the blade on the left side part of the connecting rod is alpha, and the angle beta is greater than the angle alpha. The air volume adjusting device has the advantages of flexibility in adjustment and accuracy in control, and is stable in operation.

Description

Technical Field

[0001] This utility model belongs to the field of fan technology, specifically a circular regulating gate with eccentric blades. Background Technology

[0002] A fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a type of driven fluid machinery. Currently, the air volume regulating devices used in fans generally have certain defects. Although the baffle-type regulating gate is flexible, the air volume control accuracy is not high. The petal-type regulating gate has higher air volume control accuracy, but the installation gap is difficult to control. If the gap is too small, it will cause "jamming". If the gap is too large, it will cause vibration and abnormal noise. In addition, under unstable airflow conditions, the baffle or blade in the regulating device is under unstable force, which may lead to the baffle or blade falling off in severe cases. Therefore, this application proposes a circular regulating gate with eccentric blades. Utility Model Content

[0003] To address the problems mentioned in the background art, this utility model provides the following technical solution: a circular regulating door with eccentric blades, comprising a duct, a conical body located at the center of the duct, a first rotating shaft fixedly installed at the top and bottom of the conical body, a rotating shaft sleeve fixedly installed at the top and bottom of the duct, a second rotating shaft extending into the duct being rotatably inserted into each of the two rotating shaft sleeves, a connecting rod fixedly connected between each of the two first rotating shafts and the corresponding second rotating shaft, and blades fixedly sleeved on each of the two connecting rods, the blades being configured as an eccentric structure, the included angle of the blade on the right side of the connecting rod being set as β, the included angle of the blade on the left side of the connecting rod being set as α, and the angle of β being greater than the angle of α.

[0004] Furthermore, connecting plates are movably installed at one end of each of the two second rotating shafts located outside the air duct. Spherical bearings are fixedly installed at both ends of the two connecting plates, and long connecting rods and short connecting rods are fixedly connected to the spherical bearings at both ends of the two connecting plates, respectively. Linkage shafts are fixedly installed at the lower position of the front of the air duct and the upper position of the back of the air duct, and linkage handles are rotatably installed on the two linkage shafts. Long connecting rods and short connecting rods are movably connected to both ends of the two linkage handles, respectively.

[0005] Furthermore, the long connecting rod connected to the left end of the upper connecting plate and the short connecting rod connected to the right end of the lower connecting plate are connected to the linkage handle on the front of the air duct, while the short connecting rod connected to the right end of the upper connecting plate and the long connecting rod connected to the left end of the lower connecting plate are connected to the linkage handle on the back of the air duct.

[0006] Furthermore, the blades are connected to the connecting rod, the first rotating shaft, and the second rotating shaft as a whole.

[0007] Furthermore, the connecting rods at the top and bottom of the cone are on the same vertical axis, but the center of the connecting rod and the center of the duct are not on the same vertical axis.

[0008] Furthermore, the blades do not contact the inner wall of the duct when rotating around the connecting rod.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] Due to the self-aligning function of the spherical bearing, the regulating door will not "jam" even with a small installation gap. Under unstable working conditions, the force on the eccentric blade is relatively stable. The improved linkage method ensures that the regulating door has a small installation gap, thereby avoiding vibration and abnormal noise. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of a partial cross-section of the present invention;

[0014] In the diagram: 1. Air duct; 2. Conical body; 3. First rotating shaft; 4. Second rotating shaft; 5. Connecting rod; 6. Blade; 7. Connecting plate; 8. Spherical bearing; 9. Long connecting rod; 10. Short connecting rod; 11. Linkage handle; 12. Linkage shaft; 13. Rotating shaft sleeve. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0016] Depend on Figure 1-2The present invention includes a wind tunnel 1, a conical body 2 located at the center of the wind tunnel 1, a first rotating shaft 3 fixedly installed at the top and bottom of the conical body 2, a rotating shaft sleeve 13 fixedly installed at the top and bottom of the wind tunnel 1, a second rotating shaft 4 extending into the wind tunnel 1 rotatably inserted into each of the two rotating shaft sleeves 13, a connecting rod 5 fixedly connected between each of the two first rotating shafts 3 and the corresponding second rotating shaft 4, and a blade 6 fixedly sleeved on each of the two connecting rods 5. The blade 6 is configured as an eccentric structure, the included angle of the part of the blade 6 on the right side of the connecting rod 5 is set as β, and the included angle of the part of the blade 6 on the left side of the connecting rod 5 is set as α. The angle β is greater than the angle α. Based on the original petal-shaped regulating gate, the linkage method is improved by changing the petal-shaped blade 6 to an asymmetrical eccentric structure. When it works under unstable airflow conditions, the force within the β angle range is always greater than the force within the α angle range, and the blade 6 will not swing as a result.

[0017] like Figure 1 and Figure 2 As shown, connecting plates 7 are movably installed at one end of each of the two second rotating shafts 4 located outside the air duct 1. Spherical bearings 8 are fixedly installed at both ends of the two connecting plates 7, and long connecting rods 9 and short connecting rods 10 are fixedly connected to the spherical bearings 8 at both ends of the two connecting plates 7, respectively. Linkage shafts 12 are fixedly installed at the lower position of the front and the upper position of the back of the air duct 1, and linkage handles 11 are rotatably installed on the two linkage shafts 12. Long connecting rods 9 and short connecting rods 10 are movably connected to the two ends of the two linkage handles 11, respectively.

[0018] like Figure 1 and Figure 2 As shown, the long connecting rod 9 connected to the left end of the upper connecting plate 7 and the short connecting rod 10 connected to the right end of the lower connecting plate 7 are connected to the linkage handle 11 on the front of the air duct 1, and the short connecting rod 10 connected to the right end of the upper connecting plate 7 and the long connecting rod 9 connected to the left end of the lower connecting plate 7 are connected to the linkage handle 11 on the back of the air duct 1.

[0019] like Figure 1 and Figure 2 As shown, the blade 6 is connected to the connecting rod 5, the first rotating shaft 3 and the second rotating shaft 4 to form a whole.

[0020] like Figure 1 and Figure 2 As shown, the connecting rods 5 at the top and bottom of the conical body 2 are on the same vertical axis, but the center of the connecting rod 5 and the center of the air duct 1 are not on the same vertical axis.

[0021] like Figure 1 and Figure 2 As shown, when the blade 6 rotates around the connecting rod 5, it does not contact the inner wall of the air duct 1, so that the blade 6 can operate normally inside the air duct 1.

[0022] The blade 6, connecting rod 5, second rotating shaft 4 and first rotating shaft 3 are connected into an integral structure. The linkage handle 11 is linked through the spherical bearing 8, long connecting rod 9 and short connecting rod 10. Due to the self-aligning function of the spherical bearing 8, the regulating door will not "get stuck" under small installation gaps. Under unstable working conditions, the force on the eccentric blade 6 is relatively stable. The improved linkage method ensures that the regulating door has a small installation gap, thereby avoiding shaking and abnormal noise.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A circular regulating gate employing eccentric blades, comprising a duct (1), characterized in that: A conical core (2) is provided at the middle position inside the air duct (1). A first rotating shaft (3) is fixedly installed at the top and bottom of the conical core (2). A rotating shaft sleeve (13) is fixedly installed at the top and bottom of the air duct (1). A second rotating shaft (4) extending into the air duct (1) is rotatably inserted into each of the two rotating shaft sleeves (13). A connecting rod (5) is fixedly connected between each of the two first rotating shafts (3) and the corresponding second rotating shaft (4). A blade (6) is fixedly sleeved on each of the two connecting rods (5). The blade (6) is set as an eccentric structure. The included angle of the part of the blade (6) on the right side of the connecting rod (5) is set as β, and the included angle of the part of the blade (6) on the left side of the connecting rod (5) is set as α. The angle of β is greater than the angle of α.

2. A circular regulating gate employing eccentric blades according to claim 1, characterized in that: Two second rotating shafts (4) are movably mounted with connecting plates (7) at one end outside the air duct (1). Spherical bearings (8) are fixedly mounted at both ends of the two connecting plates (7). Long connecting rods (9) and short connecting rods (10) are fixedly connected to the spherical bearings (8) at both ends of the two connecting plates (7). Linkage shafts (12) are fixedly mounted at the lower position of the front and the upper position of the back of the air duct (1). Linkage handles (11) are rotatably mounted on the two linkage shafts (12). Long connecting rods (9) and short connecting rods (10) are movably connected to both ends of the two linkage handles (11).

3. A circular regulating gate employing eccentric blades according to claim 2, characterized in that: The long connecting rod (9) connected to the left end of the upper connecting plate (7) and the short connecting rod (10) connected to the right end of the lower connecting plate (7) are connected to the linkage handle (11) on the front of the air duct (1). The short connecting rod (10) connected to the right end of the upper connecting plate (7) and the long connecting rod (9) connected to the left end of the lower connecting plate (7) are connected to the linkage handle (11) on the back of the air duct (1).

4. A circular regulating gate employing eccentric blades according to claim 1, characterized in that: The blade (6) is connected to the connecting rod (5), the first rotating shaft (3), and the second rotating shaft (4) as a whole.

5. A circular regulating gate employing eccentric blades according to claim 1, characterized in that: The connecting rods (5) at the top and bottom of the conical body (2) are on the same vertical axis, but the center of the connecting rod (5) and the center of the air duct (1) are not on the same vertical axis.

6. A circular regulating gate employing eccentric blades according to claim 1, characterized in that: The blade (6) does not contact the inner wall of the wind tunnel (1) when it rotates around the connecting rod (5).

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