Vibration and noise reduction type centrifugal fan

Abstract

The utility model relates to the technical field of centrifugal fans, and discloses a vibration and noise reduction type centrifugal fan, a vibration and noise reduction mechanism is arranged in a vibration reduction box, a fixing mechanism is arranged at the top of the vibration and noise reduction mechanism, and the vibration and noise reduction mechanism comprises a first vibration reduction assembly and a second vibration reduction assembly. The first vibration reduction assembly is arranged in the vibration reduction box, the second vibration reduction assembly is arranged at the bottom of the first vibration reduction assembly, and during use, through the arranged vibration reduction and noise reduction mechanism, when the fan body works or vibrates due to other factors, the vibration reduction and noise reduction effects on the fan body can be achieved; and through the arrangement of the upper damping device and the lower damping device, the fan can be quickly recovered to a stable state after being instantly impacted, meanwhile, sound radiation generated by vibration of the fan can be reduced, mechanical noise can be reduced, the noise reduction effect is achieved, when the fan body is used, vibration can be generated, and the noise is reduced. And during vibration, a bearing table extrudes a first telescopic rod and a first spring.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal fans, in particular to a vibration-reducing and noise-reducing centrifugal fan. Background Art

[0002] A centrifugal fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine. Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and air intake of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selection of grains; inflation and propulsion of wind tunnel wind sources and hovercraft, etc. Centrifugal fans produce resonance during operation, which brings a lot of noise and also reduces their service life.

[0003] According to the description of a vibration-reducing and noise-reducing centrifugal fan published on the patent website (authorization announcement number: CN 210218171 U), the vibration-reducing and noise-reducing centrifugal fan includes "a base, a motor, a fan body, a noise reduction box, a shock-absorbing assembly, a box body, a first support plate", etc. to achieve vibration-reducing and noise-reducing effects.

[0004] In view of the above description, the applicant believes that there are the following problems:

[0005] The vibration-reducing and noise-reducing centrifugal fan utilizes a base, a motor, a fan body, a noise reduction box, a shock-absorbing assembly, a box body, a first support plate, etc. to achieve vibration-reducing and noise-reducing effects. In the process of vibration-reducing and noise-reducing, the centrifugal fan uses an air spring airbag to achieve a vibration-reducing effect. The airbag is not only expensive to use, but also relatively difficult to maintain, which affects the vibration-reducing effect. If the airbag is in a high-pressure state or a minimum state for a long time, the service life of the airbag will be reduced. Therefore, this centrifugal fan needs to be improved. Utility Model Content

[0006] The utility model aims to provide a vibration-reducing and noise-reducing centrifugal fan to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the utility model provides the following technical solution: a vibration reduction and noise reduction centrifugal fan, comprising a vibration reduction box, a vibration reduction and noise reduction mechanism is arranged in the vibration reduction box, and a fixing mechanism is arranged on the top of the vibration reduction and noise reduction mechanism;

[0008] The vibration and noise reduction mechanism comprises a first vibration reduction assembly and a second vibration reduction assembly. The first vibration reduction assembly is arranged in a vibration reduction box, and the second vibration reduction assembly is arranged at the bottom of the first vibration reduction assembly.

[0009] Preferably, the first vibration damping assembly includes a telescopic rod, the telescopic rod is fixedly connected to the bottom of the vibration damping box, the top of the telescopic rod is fixedly connected to a load-bearing platform, a first spring is sleeved on the outer periphery of the telescopic rod, the top of the first spring is fixedly connected to the bottom of the load-bearing platform, the bottom of the first spring is fixedly connected to the bottom of the vibration damping box, a placement groove is provided on the top of the load-bearing platform, the bottom of the load-bearing platform is fixedly connected to an upper damper, and a lower damper is provided on the right side of the upper damper.

[0010] Preferably, the lower damping is fixedly connected to the bottom of the vibration damping box, and the upper damping and the lower damping are in contact with each other, so that when the fan body is working or other factors cause vibration, the upper damping and the damping can help the fan to quickly recover to a stable state after being subjected to an instantaneous impact. At the same time, it helps to reduce the sound radiation generated by the vibration of the fan, reduce mechanical noise, and achieve a noise reduction effect.

[0011] Preferably, the second vibration damping assembly includes a first concave frame, the first concave frame is fixedly connected to the bottom of the load-bearing platform, a rotating shaft is rotatably connected inside the first concave frame, a second concave frame is rotatably connected to the left side of the rotating shaft, a rectangular block is fixedly connected to the left side of the second concave frame, a fixed rod is fixedly connected to the left side of the rectangular block, a connecting plate is fixedly connected to the left side of the fixing rod, a sleeve is slidably connected to the periphery of the connecting plate, a second spring is fixedly connected to the left side of the sleeve, the right side of the second spring is fixedly connected to the left side of the connecting plate, and the sleeve is fixedly connected to the left side of the vibration damping box.

[0012] Preferably, a slider is fixedly connected to the bottom of the rectangular block, and the slider is slidably connected to the bottom of the vibration damping box, so that when the angle of the rotating shaft changes and drives the second concave frame to move left and right, the rectangular block drives the slider to slide at the bottom of the vibration damping box, which can limit the rectangular block and make the movement of the rectangular block more stable.

[0013] Preferably, the fixing mechanism includes a base, which is arranged at the bottom of the placement groove, the bottom of the base is in contact with the bottom of the placement groove, the base is internally threaded with a fixing bolt, the top of the base is fixedly connected to a load-bearing frame, the top of the load-bearing frame is fixedly connected to a servo motor, and the left side of the servo motor is fixedly connected to a fan body.

[0014] Preferably, four fixing bolts are provided, and the four fixing bolts are respectively threadedly connected to the inside of the base, so that the base and the load-bearing platform are in a fixed connection state through the fixing bolts, thereby ensuring the stability of the fan body.

[0015] Compared with the prior art, the utility model provides a vibration-reducing and noise-reducing centrifugal fan, which has the following beneficial effects:

[0016] 1. The vibration reduction and noise reduction centrifugal fan can achieve the effect of vibration reduction and noise reduction on the fan body when the fan body is working or vibrates due to other factors through the vibration reduction and noise reduction mechanism, and the upper damping and lower damping can help the fan to quickly recover to a stable state after being subjected to an instantaneous impact, and at the same time help to reduce the sound radiation caused by the vibration of the fan, reduce mechanical noise, and achieve a noise reduction effect. When the fan body is in use, it will vibrate, and when vibrating, the load-bearing platform will squeeze the first telescopic rod and the first spring. The elasticity of the first spring can achieve a preliminary vibration reduction and noise reduction effect on the load-bearing platform, and at the same time When the platform moves downward, the angle of the rotating shaft will change through the first concave frame, and the second concave frame will be squeezed through the rotating shaft, so that the second concave frame drives the rectangular block to move left and right. During the movement of the rectangular block, the connecting plate will be driven to slide in the sleeve through the fixed rod, and the second spring will be squeezed through the connecting plate. The elasticity of the second spring will also have a buffering effect on the load-bearing platform, thereby achieving a vibration reduction and noise reduction effect. When the load-bearing platform moves downward, the upper damping and the lower damping will contact each other at the same time. Under the action of the upper damping and the lower damping, the sound radiation generated by the vibration of the fan can be reduced, the mechanical noise can be reduced, and the noise reduction effect can be better.

[0017] 2. The vibration-reducing and noise-reducing centrifugal fan can quickly fix the fan body through the setting of the fixing mechanism, so that the base and the load-bearing platform are in a fixed connection state to ensure the stability of the fan body. First, place the base in the placement groove, and then fix the base and the load-bearing platform with the fixing bolts to fix the fan body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative labor:

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 This is a front sectional structural schematic diagram of the utility model;

[0021] Figure 3 It is a schematic diagram of the structure of the vibration reduction and noise reduction mechanism;

[0022] Figure 4 is a schematic diagram of the structure of the first vibration reduction assembly;

[0023] Figure 5 is a schematic diagram of the structure of the second vibration reduction assembly;

[0024] Figure 6 It is a schematic diagram of the structure on the left side of the rectangular block;

[0025] Figure 7 It is a schematic diagram of the fixed mechanism structure.

[0026] In the figure: 1. vibration damping box; 2. vibration damping and noise reduction mechanism; 3. fixing mechanism; 21. first vibration damping assembly; 22. second vibration damping assembly; 211. load-bearing platform; 212. placement slot; 213. first spring; 214. telescopic rod; 215. upper damping; 216. lower damping; 221. first concave frame; 222. rotating shaft; 223. rectangular block; 224. fixing rod; 225. second concave frame; 226. connecting plate; 227. second spring; 228. sleeve; 31. base; 32. fixing bolt; 33. load-bearing frame; 34. servo motor; 35. fan body. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] The utility model provides the following technical solutions: Example

[0030] See also Figure 1-7 The utility model provides a technical solution: a vibration-damping and noise-reducing centrifugal fan, comprising a vibration-damping box 1, a vibration-damping and noise-reducing mechanism 2 is arranged in the vibration-damping box 1, a fixing mechanism 3 is arranged on the top of the vibration-damping and noise-reducing mechanism 2, the vibration-damping and noise-reducing mechanism 2 comprises a first vibration-damping component 21 and a second vibration-damping component 22, the first vibration-damping component 21 is arranged in the vibration-damping box 1, and the second vibration-damping component 22 is arranged at the bottom of the first vibration-damping component 21.

[0031] The first vibration reduction assembly 21 includes a telescopic rod 214, which is fixedly connected to the bottom of the vibration reduction box 1, and a load-bearing platform 211 is fixedly connected to the top of the telescopic rod 214. A first spring 213 is sleeved on the outer periphery of the telescopic rod 214, and the top of the first spring 213 is fixedly connected to the bottom of the load-bearing platform 211, and the bottom of the first spring 213 is fixedly connected to the bottom of the vibration reduction box 1. A placement groove 212 is provided on the top of the load-bearing platform 211, and an upper damper 215 is fixedly connected to the bottom of the load-bearing platform 211. A lower damper 216 is arranged on the right side of the upper damper 215, and the lower damper 216 is fixedly connected to the bottom of the vibration reduction box 1. The upper damper 215 and the lower damper 216 are in contact with each other, so that when the fan body 35 is working or other factors cause vibration, the upper damper 215 and the damper can help the fan to quickly recover to a stable state after being subjected to an instantaneous impact, and at the same time help to reduce the sound radiation generated by the vibration of the fan, reduce mechanical noise, and achieve a noise reduction effect.

[0032] See also Figure 1-7 The utility model provides a technical solution: the second vibration reduction assembly 22 includes a first concave frame 221, the first concave frame 221 is fixedly connected to the bottom of the load-bearing platform 211, a rotating shaft 222 is rotatably connected inside the first concave frame 221, a second concave frame 225 is rotatably connected to the left side of the rotating shaft 222, a rectangular block 223 is fixedly connected to the left side of the second concave frame 225, a fixed rod 224 is fixedly connected to the left side of the rectangular block 223, a connecting plate 226 is fixedly connected to the left side of the fixing rod 224, and a sleeve 226 is slidably connected to the outer periphery of the connecting plate 226 8. A second spring 227 is fixedly connected to the left side of the sleeve 228, and the right side of the second spring 227 is fixedly connected to the left side of the connecting plate 226. The sleeve 228 is fixedly connected to the left side of the vibration damping box 1. A slider is fixedly connected to the bottom of the rectangular block 223, and the slider is slidably connected to the bottom of the vibration damping box 1, so that when the angle of the rotating shaft 222 changes and drives the second concave frame 225 to move left and right, the rectangular block 223 drives the slider to slide at the bottom of the vibration damping box 1, which can limit the rectangular block 223 and make the movement of the rectangular block 223 more stable. Example

[0033] See also Figure 1-7 On the basis of the first embodiment, the fixing mechanism 3 further comprises a base 31, the base 31 is arranged at the bottom of the placement groove 212, the bottom of the base 31 is in contact with the bottom of the placement groove 212, a fixing bolt 32 is threadedly connected inside the base 31, a load-bearing frame 33 is fixedly connected to the top of the base 31, a servo motor 34 is fixedly connected to the top of the load-bearing frame 33, a fan body 35 is fixedly connected to the left side of the servo motor 34, four fixing bolts 32 are arranged, and the four fixing bolts 32 are respectively threadedly connected to the inside of the base 31, so that the base 31 and the load-bearing platform 211 are in a fixed connection state through the fixing bolts 32, thereby ensuring the stability of the fan body 35.

[0034] In actual operation, when the device is used, the base 31 is first placed in the placement groove 212, and then the base 31 is fixedly connected to the load-bearing platform 211 through the fixing bolt 32, so that the fan body 35 is in a fixed state. When the fan body 35 is in use, it will vibrate, and when vibrating, the load-bearing platform 211 will squeeze the first telescopic rod 214 and the first spring 213. The elasticity of the first spring 213 can play a preliminary vibration reduction and noise reduction effect on the load-bearing platform 211. At the same time, when the load-bearing platform 211 moves downward, it will drive the rotation shaft 222 to change its angle through the first concave frame 221, and the second concave frame 22 will be pressed by the rotation shaft 222. 5 is squeezed, so that the second concave frame 225 drives the rectangular block 223 to move left and right. During the movement of the rectangular block 223, the connecting plate 226 is driven to slide in the sleeve 228 through the fixing rod 224, and the second spring 227 is squeezed through the connecting plate 226. The elasticity of the second spring 227 also plays a buffering role on the load-bearing platform 211, and has a vibration reduction and noise reduction effect. When the load-bearing platform 211 moves downward, the upper damping 215 and the lower damping 216 are simultaneously brought into contact with each other. Under the action of the upper damping 215 and the lower damping 216, the sound radiation generated by the vibration of the fan can be reduced, the mechanical noise can be reduced, and the noise reduction effect can be better.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A vibration-reducing and noise-reducing centrifugal fan, comprising a vibration-reducing box (1), characterized in that: A vibration reduction and noise reduction mechanism (2) is arranged in the vibration reduction box (1), and a fixing mechanism (3) is arranged on the top of the vibration reduction and noise reduction mechanism (2); The vibration and noise reduction mechanism (2) comprises a first vibration reduction component (21) and a second vibration reduction component (22), wherein the first vibration reduction component (21) is arranged in the vibration reduction box (1), and the second vibration reduction component (22) is arranged at the bottom of the first vibration reduction component (21); The first vibration damping assembly (21) comprises a telescopic rod (214), the telescopic rod (214) being fixedly connected to the bottom of the vibration damping box (1), the top of the telescopic rod (214) being fixedly connected to a load-bearing platform (211), the outer periphery of the telescopic rod (214) being sleeved with a first spring (213), the top of the first spring (213) being fixedly connected to the bottom of the load-bearing platform (211), the bottom of the first spring (213) being fixedly connected to the bottom of the vibration damping box (1), the top of the load-bearing platform (211) being provided with a placement groove (212), the bottom of the load-bearing platform (211) being fixedly connected to an upper damper (215), and a lower damper (216) being provided on the right side of the upper damper (215); The lower damper (216) is fixedly connected to the inner bottom of the vibration damping box (1), and the upper damper (215) and the lower damper (216) are in contact with each other.

2. A vibration-reducing and noise-reducing centrifugal fan according to claim 1, characterized in that: The second vibration damping assembly (22) comprises a first concave frame (221), the first concave frame (221) being fixedly connected to the bottom of the load-bearing platform (211), a rotating shaft (222) being rotatably connected inside the first concave frame (221), a second concave frame (225) being rotatably connected on the left side of the rotating shaft (222), a rectangular block (223) being fixedly connected on the left side of the second concave frame (225), a fixing rod (224) being fixedly connected on the left side of the rectangular block (223), a connecting plate (226) being fixedly connected on the left side of the fixing rod (224), a sleeve (228) being slidably connected to the periphery of the connecting plate (226), a second spring (227) being fixedly connected on the left side inside the sleeve (228), the second spring (227) being fixedly connected on the right side to the left side of the connecting plate (226), and the sleeve (228) being fixedly connected to the left side inside the vibration damping box (1).

3. A vibration-reducing and noise-reducing centrifugal fan according to claim 2, characterized in that: A sliding block is fixedly connected to the bottom of the rectangular block (223), and the sliding block is slidably connected to the bottom of the vibration damping box (1).

4. The vibration-reducing and noise-reducing centrifugal fan according to claim 1, characterized in that: The fixing mechanism (3) comprises a base (31), the base (31) being arranged at the bottom of the placement groove (212), the bottom of the base (31) being in contact with the bottom of the placement groove (212), a fixing bolt (32) being internally threadedly connected to the base (31), a load-bearing frame (33) being fixedly connected to the top of the base (31), a servo motor (34) being fixedly connected to the top of the load-bearing frame (33), and a fan body (35) being fixedly connected to the left side of the servo motor (34).

5. A vibration-reducing and noise-reducing centrifugal fan according to claim 4, characterized in that: Four fixing bolts (32) are provided, and the four fixing bolts (32) are respectively threadedly connected to the inside of the base (31).

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