A centrifugal fan volute and motor connecting structure

Abstract

The utility model discloses a kind of connection structure of centrifugal fan volute and motor, including volute, volute side fixed connection damping component, the side of damping component away from volute is equipped with suction component, part structure of the suction component is inserted into volute and penetrates damping component, one is directly blocked vibration energy along the path of linear penetration rubber layer, avoid energy direct transmission;Two are forced vibration wave at the interface of staggered sheet and rubber repeatedly occurs reflection and scattering, significantly improve the dissipation efficiency of vibration energy, to further weaken vibration transmission intensity.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal fans, and in particular to a connection structure between the centrifugal fan casing and the motor. Background Technology

[0002] In traditional centrifugal fans used in the current industrial field, the connection between their core components generally adopts a specific structural design. Specifically, the fan casing and the flange of the drive motor are rigidly connected to achieve a stable assembly, thereby ensuring the structural stability of the equipment during operation.

[0003] The main drawbacks of direct connection between centrifugal fans and motors are: First, the rigid structure of the direct connection transmits vibration, resulting in significantly low vibration reduction efficiency, which is difficult to meet the vibration reduction requirements of precision working conditions; Second, the high coupling degree of the transmission system requires repeated parameter calibration during the commissioning process, which leads to complex and time-consuming engineering implementation; Third, the airflow disturbance and structural resonance caused by the direct connection make it difficult to effectively control aerodynamic noise, which does not meet the low noise design standards. Utility Model Content

[0004] The purpose of this utility model is to provide a connection structure between the centrifugal fan casing and the motor, so as to solve the problem mentioned in the background art that it is difficult to meet the vibration reduction requirements of precision working conditions.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A connection structure between a centrifugal fan casing and a motor includes a casing, a shock-absorbing component fixedly connected to the side of the casing, and an air extraction component provided on the side of the shock-absorbing component away from the casing. A portion of the air extraction component penetrates the shock-absorbing component and is inserted into the casing. The shock absorption assembly includes a metal flange outer ring, a metal flange inner ring, and a rubber ring. One side of the metal flange outer ring is fixedly connected to the side of the volute, and the metal flange outer ring and the metal flange inner ring are coaxially arranged. The inner ring wall of the metal flange outer ring is provided with several pieces of segmented misaligned plates, and the outer ring wall of the metal flange inner ring is provided with several pieces of segmented misaligned plates. The rubber ring fills the gap formed between the outer ring of the metal flange, the inner ring of the metal flange, and the first and second segmented misaligned plates. The air extraction assembly is connected to the side of the inner ring of the metal flange away from the volute, and part of the structure of the air extraction assembly penetrates the inner ring of the metal flange and is inserted into the volute.

[0006] More preferably, the rubber ring is made of nitrile rubber or silicone rubber.

[0007] More preferably, the outer ring and inner ring of the metal flange are made of 6061-T6 aluminum alloy or Q235B cold-rolled steel.

[0008] More preferably, the first segmented misalignment plate and the second segmented misalignment plate are made of 304 stainless steel or glass fiber PA66.

[0009] Preferably, the first segmented misaligned plate and the second segmented misaligned plate are arranged in a circumferentially offset manner, and the first segmented misaligned plate and the second segmented misaligned plate cooperate with the rubber ring to form a Z-shaped channel inside the rubber ring.

[0010] Preferably, the volute has an air inlet and an air outlet on its side, and the volute, the shock absorption assembly, and the air extraction assembly form a flow cavity, which is interconnected with the air outlet.

[0011] Preferably, the air extraction assembly includes a drive motor, which is fixedly connected to the side of the inner ring of the metal flange away from the volute. The drive end of the drive motor is connected to a drive shaft, and the end of the drive shaft away from the drive motor passes through the inner ring of the metal flange and is inserted into the volute. A fan blade is fixedly mounted on the outer circular surface of the drive shaft inside the volute. Several sets of curved air guide chambers are opened inside the fan blades, and the air guide chambers are interconnected with the air inlet and the flow chamber, respectively.

[0012] The beneficial effects of this utility model are: 1. By using the circular misalignment of the first and second misaligned plates to form a Z-shaped channel inside the rubber ring, a dual mechanism is achieved to enhance the vibration reduction effect: First, it directly blocks the path of vibration energy through the rubber layer in a straight line, avoiding direct energy transmission; second, it forces the vibration wave to be repeatedly reflected and scattered at the interface between the misaligned plates and the rubber, significantly improving the dissipation efficiency of vibration energy, thereby further weakening the intensity of vibration transmission.

[0013] 2. The segmented misaligned plate one and segmented misaligned plate two form an integrated structure with the rubber ring through a vulcanization process. This design has dual technical advantages: First, the interface molecular-level bonding can effectively suppress the deformation displacement and aging peeling risk of the rubber ring under long-term alternating vibration environment, significantly improving the long-term stability of the structure; Second, the rigidity characteristics of the metal sheet itself can be used to precisely control the dynamic deformation amplitude of the rubber layer, avoiding the attenuation of the damping coefficient of the rubber material due to excessive stretching / compression, and continuously maintaining stable vibration reduction and noise reduction performance indicators.

[0014] 3. By combining the rigid positioning of the outer and inner rings of the metal flange with the flexible vibration damping of the rubber ring, a "rigid-flexible" system is formed. This system not only meets the structural strength requirements of the fan during operation but also effectively blocks vibration transmission. The addition of the misalignment plate further optimizes the vibration transmission path and solves the stability problem of the rubber layer during long-term use. This structural design also has installation advantages—the outer and inner rings of the metal flange can be directly connected to the volute and drive motor via bolts through standard interfaces without additional modifications. It balances vibration reduction and noise reduction effects with engineering practicality, and is especially suitable for industrial ventilation and air conditioning systems and other scenarios with high requirements for easy equipment installation. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model; Figure 2 This is a three-dimensional structural diagram of an embodiment of the present utility model; Figure 3 This is a cross-sectional perspective view of an embodiment of the present utility model. Figure 4 This is a schematic diagram of the structure of the fan blade of this utility model; Figure 5 This is a utility model Figure 4 A schematic diagram of AA in the diagram.

[0016] In the diagram: 1. Volute; 2. Shock absorber assembly; 21. Outer ring of metal flange; 22. Inner ring of metal flange; 23. Rubber ring; 24. Segmented misalignment plate one; 25. Segmented misalignment plate two; 3. Air extraction assembly; 31. Drive motor; 32. Drive shaft; 33. Fan blade; 34. Air guide chamber; 11. Air inlet; 12. Air outlet; 13. Flow chamber. Detailed Implementation

[0017] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] See Figures 1-5 This utility model provides a connection structure between a centrifugal fan casing and a motor, including a casing 1, a shock-absorbing component 2 fixedly connected to the side of the casing 1, and an air extraction component 3 provided on the side of the shock-absorbing component 2 away from the casing 1, with a portion of the air extraction component 3 penetrating the shock-absorbing component 2 and inserted into the casing 1. The shock absorption assembly 2 includes a metal flange outer ring 21, a metal flange inner ring 22, and a rubber ring 23. One side of the metal flange outer ring 21 is fixedly connected to the side of the volute 1, and the metal flange outer ring 21 and the metal flange inner ring 22 are coaxially arranged. The inner ring wall of the metal flange outer ring 21 is provided with several pieces of segmented misaligned plate 1 24, and the outer ring wall of the metal flange inner ring 22 is provided with several pieces of segmented misaligned plate 25. The rubber ring 23 fills the gap formed between the outer ring 21 of the metal flange, the inner ring 22 of the metal flange, the first segmented misaligned plate 24 and the second segmented misaligned plate 25. The air extraction component 3 is connected to the side of the inner ring 22 of the metal flange away from the volute 1, and part of the structure of the air extraction component 3 penetrates the inner ring 22 of the metal flange and is inserted into the volute 1.

[0019] The rubber ring 23 is made of nitrile rubber or silicone rubber.

[0020] The outer ring 21 and the inner ring 22 of the metal flange are made of 6061-T6 aluminum alloy or Q235B cold-rolled steel.

[0021] The segmented misalignment plate 24 and the segmented misalignment plate 25 are made of 304 stainless steel or glass fiber PA66.

[0022] The segmented misaligned plate 24 and the segmented misaligned plate 25 are integrated with the rubber ring 23 through a vulcanization process to form an integrated structure.

[0023] When the shock absorption assembly 2 is activated, it generates vibration. This vibration is then transmitted to the inner ring 22 of the metal flange, the second segmented misaligned plate 25, the first segmented misaligned plate 24, and the outer ring 21 of the metal flange, thus achieving the effect of shock absorption.

[0024] Specifically, the segmented misalignment plate 24 and the segmented misalignment plate 25 are arranged in a circumferentially offset manner, and the segmented misalignment plate 24, the segmented misalignment plate 25 and the rubber ring 23 cooperate with each other to form a Z-shaped channel inside the rubber ring 23.

[0025] Among them, the segmented misalignment plate 24 and the segmented misalignment plate 25 are circumferentially misaligned by 4°-8°, which completely cuts off the straight transmission path of vibration, reducing the vibration transmission rate by 25%-30% compared with the design without misalignment. This can effectively avoid the overall resonance caused by the transmission of motor vibration to the volute, and weaken the basis for the generation of mechanical noise from the source.

[0026] Specifically, the volute 1 has an air inlet 11 and an air outlet 12 on its side. The volute 1, the shock absorption assembly 2, and the air extraction assembly 3 form a flow cavity 13, which is interconnected with the air outlet 12.

[0027] Specifically, the air extraction assembly 3 includes a drive motor 31, which is fixedly connected to the side of the inner ring 22 of the metal flange away from the volute 1. A drive shaft 32 is connected to the drive end of the drive motor 31. The end of the drive shaft 32 away from the drive motor 31 passes through the inner ring 22 of the metal flange and is inserted into the volute 1. A fan blade 33 is fixedly mounted on the outer circumferential surface of the drive shaft 32 inside the volute 1. Several sets of curved air guide chambers 34 are formed inside the fan blades 33, and these chambers communicate with the air inlet 11 and the flow chamber 13, respectively. When the drive motor 31 in the air extraction assembly 3 is started, it drives the drive shaft 32 and the fan blades 33 to rotate at high speed, thereby drawing in outside air.

[0028] Working principle of this utility model: Before use, the drive motor 31 in the air extraction assembly 3 is started, which drives the drive shaft 32 and the fan blade 33 to start rotating at high speed, thereby drawing in outside air into the air inlet 11, then through the air guide chamber 34 into the flow chamber 13, and finally out from the air outlet 12. During the start-up process of the drive motor 31, vibration is generated. At this time, the vibration will be transmitted to the inner ring 22 of the metal flange, the second segmented misaligned plate 25, the first segmented misaligned plate 24 and the outer ring 21 of the metal flange, achieving the effect of shock absorption.

[0029] In terms of configuration, 30 to 40 pieces of segmented misaligned plates 24 and 25 are evenly distributed on the outer ring 21 and inner ring 22 of the metal flange (the number of pieces at an appropriate angle is reasonably selected according to the density) to ensure the consistency and stability of the vibration suppression effect in the circumferential direction and to ensure the reliable operation of the overall vibration reduction system.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A connection structure of a centrifugal fan volute and a motor, comprising a volute (1), characterized in that: The side of the volute (1) is fixedly connected to the shock-absorbing component (2). The side of the shock-absorbing component (2) away from the volute (1) is provided with an air extraction component (3). Part of the structure of the air extraction component (3) passes through the shock-absorbing component (2) and is inserted into the volute (1). The shock absorption assembly (2) includes a metal flange outer ring (21), a metal flange inner ring (22) and a rubber ring (23). One side of the metal flange outer ring (21) is fixedly connected to the side of the volute (1), and the metal flange outer ring (21) and the metal flange inner ring (22) are coaxially arranged. The inner ring wall of the metal flange outer ring (21) is provided with several pieces of segmented misaligned plate one (24), and the outer ring wall of the metal flange inner ring (22) is provided with several pieces of segmented misaligned plate two (25). The rubber ring (23) fills the gap formed between the outer ring (21) of the metal flange, the inner ring (22) of the metal flange, the first segmented misalignment plate (24) and the second segmented misalignment plate (25). The air extraction component (3) is connected to the side of the inner ring (22) of the metal flange away from the volute (1), and part of the structure of the air extraction component (3) penetrates the inner ring (22) of the metal flange and is inserted into the volute (1).

2. The connecting structure of the centrifugal fan volute and the motor according to claim 1, characterized in that: The segmented misalignment plate one (24) and segmented misalignment plate two (25) are arranged in a circumferential misalignment, and the segmented misalignment plate one (24), segmented misalignment plate two (25) and rubber ring (23) cooperate with each other to form a Z-shaped channel inside the rubber ring (23).

3. The connection structure of a centrifugal fan volute and a motor according to claim 1, characterized in that: The volute (1) has an air inlet (11) and an air outlet (12) on its side. The volute (1), the shock absorption assembly (2), and the air extraction assembly (3) form a flow cavity (13), which is connected to the air outlet (12).

4. The connection structure of the centrifugal fan volute and the motor according to claim 3, characterized in that: The air extraction assembly (3) includes a drive motor (31), which is fixedly connected to the side of the inner ring (22) of the metal flange away from the volute (1). The drive end of the drive motor (31) is connected to a drive shaft (32). The end of the drive shaft (32) away from the drive motor (31) passes through the inner ring (22) of the metal flange and is inserted into the volute (1). The drive shaft (32) is fixedly fitted with a fan blade (33) on the outer circular surface inside the volute (1). Several sets of curved air guide chambers (34) are opened inside the fan blades (33). The air guide chambers (34) are respectively connected to the air inlet (11) and the flow chamber (13).

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