Centrifugal fan with noise reduction structure

Abstract

The utility model discloses a centrifugal fan with a noise reduction structure, which relates to the technical field of centrifugal fans and comprises a shell, a connecting mechanism and a positioning mechanism, a servo motor is mounted on the front side of the shell, the connecting mechanism comprises a second connecting ring fixedly connected to the back side of the servo motor, and a first connecting ring is fixedly connected to the front side of the shell. The positioning mechanism comprises an inserting ring, a plurality of threaded holes are formed in the outer wall of the first connecting ring, bolts are in threaded connection with the inner walls of the threaded holes, and a plurality of positioning holes are formed in the outer wall of the inserting ring. Through the arrangement of the threaded hole, the bolt, the positioning hole and the inserting ring, the bolt is screwed into the threaded hole, so that the bolt is inserted into the positioning hole, and the second connecting ring and the first connecting ring are fixed in a transverse positioning mode; and the second connecting ring and the first connecting ring cannot be longitudinally separated, so that relatively large vibration noise generated when the servo motor works is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal fans, in particular to a centrifugal fan with a noise reduction structure. 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.

[0003] When the centrifugal fan is working, the motor on it works to make the impeller inside the centrifugal fan rotate, so that the air is drawn out of the air outlet pipe and discharged through the air inlet pipe.

[0004] The motor on the centrifugal fan is generally installed on the centrifugal fan through a flange installation method. This method uses multiple bolts to screw into the centrifugal fan, and the direction of the bolts is consistent with the direction of the motor shaft. As a result, when the bolts are loosened, a gap will appear between the motor and the centrifugal fan housing. When the motor is working, it will generate a large noise due to the gap between the motor and the centrifugal fan housing. For this reason, we propose a centrifugal fan with a noise reduction structure. Utility Model Content

[0005] The utility model aims to provide a centrifugal fan with a noise reduction structure to solve the problems raised in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical solution: a centrifugal fan with a noise reduction structure, comprising:

[0007] A housing, a servo motor being mounted on the front side of the housing;

[0008] A connecting mechanism, the connecting mechanism comprising a second connecting ring fixedly connected to the back of the servo motor, and a first connecting ring fixedly connected to the front of the housing;

[0009] A positioning mechanism is arranged between the first connecting ring and the second connecting ring, and the positioning mechanism includes an insert ring fixedly connected to the back of the second connecting ring, the outer wall of the insert ring is movably connected with the inner wall of the first connecting ring, the outer wall of the first connecting ring is provided with a plurality of threaded holes, the inner walls of the plurality of threaded holes are threadedly connected with bolts, the outer wall of the insert ring is provided with a plurality of positioning holes, and the outer walls of the plurality of bolts are movably connected with the inner walls of the plurality of positioning holes.

[0010] Preferably, one end of the bolt is fixedly connected to a truncated cone block, and the outer wall of the truncated cone block is movably interlaced with the inner wall of the positioning hole.

[0011] Preferably, a washer is provided between the bolt and the first connecting ring, and the washer is sleeved on the outer wall of the bolt.

[0012] Preferably, an annular groove is provided on the front side of the first connecting ring, a rubber ring is movably inserted and connected to the inner wall of the annular groove, and the front side of the rubber ring is arranged in an interference fit with the back side of the second connecting ring.

[0013] Preferably, an air outlet duct is provided on the outer wall of the shell, a connection frame is fixedly connected to the top of the outer wall of the air outlet duct, and a plurality of connection holes are opened on the top of the connection frame.

[0014] Preferably, a base is provided below the servo motor, a mounting seat is fixedly connected to the top of the base, and the servo motor is mounted on the top of the mounting seat.

[0015] Preferably, a plurality of limit blocks are fixedly connected to the inner wall of the first connecting ring, a plurality of limit grooves are provided on the outer wall of the inserting ring, and the outer walls of the plurality of limit blocks are movably interlaced and connected with the inner walls of the plurality of limit grooves respectively.

[0016] Technical effects and advantages of the utility model:

[0017] The utility model utilizes the arrangement of threaded holes, bolts, positioning holes and insert rings. After the insert ring is fully inserted into the first connecting ring, the threaded hole is aligned with the positioning hole. Then the bolt is screwed into the threaded hole so that the bolt is inserted into the positioning hole. Thus, the second connecting ring and the first connecting ring are fixed in a transverse positioning manner. Even if the bolt and the threaded hole are loose, the second connecting ring and the first connecting ring will not be separated longitudinally, thereby avoiding a large gap between the second connecting ring and the first connecting ring and reducing the large vibration noise generated when the servo motor is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 It is a schematic diagram of the top cross-sectional structure of the first connecting ring of the utility model.

[0020] Figure 3 For this utility model Figure 2 Schematic diagram of the local enlarged structure at point A.

[0021] In the figure: 101, housing; 102, servo motor; 201, first connecting ring; 202, second connecting ring; 301, threaded hole; 302, bolt; 303, positioning hole; 304, plug ring; 401, gasket; 402, truncated cone block; 501, annular groove; 502, rubber ring; 601, air outlet duct; 602, connecting frame; 603, connecting hole; 701, base; 702, mounting seat; 801, limit block; 802, limit groove. DETAILED DESCRIPTION

[0022] 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.

[0023] The utility model provides Figure 1-3 A centrifugal fan with a noise reduction structure shown in the figure includes a housing 101, a connecting mechanism and a positioning mechanism. A servo motor 102 is installed on the front of the housing 101. The connecting mechanism includes a second connecting ring 202 fixedly connected to the back of the servo motor 102. A first connecting ring 201 is fixedly connected to the front of the housing 101. The first connecting ring 201 and the second connecting ring 202 are connected by the positioning mechanism, so that the servo motor 102 can be installed on the front of the housing 101, so that the centrifugal fan can work stably. An impeller is arranged inside the housing 101, and the impeller is directly connected to the main shaft of the servo motor 102. The servo motor 102 After working, it can drive the impeller to rotate, and an air inlet is arranged on the back side of the shell 101. The rotation of the impeller can suck the external air into the shell 101 through the air inlet. The outer wall of the shell 101 is provided with an air outlet pipe 601, and the top of the outer wall of the air outlet pipe 601 is fixedly connected with a connecting frame 602, and a plurality of connecting holes 603 are provided at the top of the connecting frame 602. The air entering the shell 101 will be discharged through the air outlet pipe 601, and the connecting frame 602 cooperates with the connecting holes 603 to facilitate the connection of the air outlet pipe 601 with the external equipment, so that the air discharged from the air outlet pipe 601 can directly enter the external equipment for use.

[0024] In a preferred embodiment, the positioning mechanism is arranged between the first connecting ring 201 and the second connecting ring 202, and the positioning mechanism includes an insert ring 304 fixedly connected to the back of the second connecting ring 202, the outer wall of the insert ring 304 is movably connected with the inner wall of the first connecting ring 201, the outer wall of the first connecting ring 201 is provided with a plurality of threaded holes 301, the inner walls of the plurality of threaded holes 301 are all threadedly connected with bolts 302, the outer wall of the insert ring 304 is provided with a plurality of positioning holes 303, the outer walls of the plurality of bolts 302 are respectively movably connected with the inner walls of the plurality of positioning holes 303, and the insert ring 304 is completely inserted into the first connecting ring 201, the threaded hole 301 is aligned with the positioning hole 303, and then the bolt 302 is screwed into the threaded hole 301, so that the bolt 302 is inserted into the positioning hole 303, thereby fixing the second connecting ring 202 and the first connecting ring 201 in a horizontal positioning manner, even if the bolt 302 and the threaded hole 301 are loose, the second connecting ring 202 and the first connecting ring 201 will not be separated longitudinally, thereby avoiding a large gap between the second connecting ring 202 and the first connecting ring 201, and reducing the large vibration noise generated when the servo motor 102 is working.

[0025] Among them, one end of the bolt 302 is fixedly connected to a truncated cone block 402, and the outer wall of the truncated cone block 402 is movably interlaced with the inner wall of the positioning hole 303. Through the setting of the truncated cone block 402, it is convenient to screw the bolt 302 into the threaded hole 301 and insert it into the positioning hole 303, thereby improving the convenience of the positioning mechanism.

[0026] Among them, a washer 401 is arranged between the bolt 302 and the first connecting ring 201, and the washer 401 is sleeved on the outer wall of the bolt 302. Through the setting of the washer 401, when the bolt 302 is screwed into the threaded hole 301, the knob of the bolt 302 is against the washer 401, so that the bolt 302 can be tightly screwed in the threaded hole 301, thereby further improving the stability of the positioning mechanism.

[0027] Among them, an annular groove 501 is opened on the front side of the first connecting ring 201, and a rubber ring 502 is movably inserted and connected to the inner wall of the annular groove 501. The front side of the rubber ring 502 and the back side of the second connecting ring 202 are arranged in an interference fit. Through the arrangement of the rubber ring 502, when the second connecting ring 202 is connected to the first connecting ring 201, the second connecting ring 202 will press against the front side of the rubber ring 502 until the bolt 302 is screwed into the threaded hole 301 and inserted into the positioning hole 303. At this time, the second connecting ring 202 will squeeze the rubber ring 502 to deform, so that the rubber ring 502 is stuck between the second connecting ring 202 and the first connecting ring 201, which can further reduce the noise generated by the hard contact between the first connecting ring 201 and the second connecting ring 202. At the same time, through the arrangement of the annular groove 501, the rubber ring 502 is stuck in the annular groove 501, which can avoid the rubber ring 502 from separating from the second connecting ring 202 and the first connecting ring 201.

[0028] The inner wall of the first connecting ring 201 is fixedly connected with a plurality of limit blocks 801, and the outer wall of the plug ring 304 is provided with a plurality of limit grooves 802. The outer walls of the plurality of limit blocks 801 are movably connected with the inner walls of the plurality of limit grooves 802 respectively. In the process of inserting the plug ring 304 into the first connecting ring 201, the limit grooves 802 are aligned with the limit blocks 801, so that the movement of the second connecting ring 202 drives the plug ring 304 to move, so that the limit blocks 801 are stuck in the limit grooves 802 until the plug ring 304 is completely inserted into the first connecting ring 201. At this time, the threaded hole 301 is aligned with the positioning hole 303, and the bolt 302 can be screwed into the threaded hole 301 and inserted into the positioning hole 303, thereby improving the accuracy of the positioning mechanism.

[0029] A base 701 is disposed below the servo motor 102 , a mounting seat 702 is fixedly connected to the top of the base 701 , and the servo motor 102 is mounted on the top of the mounting seat 702 , so that the servo motor 102 can work stably.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A centrifugal fan with a noise reduction structure, characterized in that: include: A housing (101), a servo motor (102) being mounted on the front side of the housing (101); A connecting mechanism, the connecting mechanism comprising a second connecting ring (202) fixedly connected to the back of the servo motor (102), and a first connecting ring (201) fixedly connected to the front of the housing (101); A positioning mechanism, wherein the positioning mechanism is arranged between the first connecting ring (201) and the second connecting ring (202), and the positioning mechanism includes an insert ring (304) fixedly connected to the back side of the second connecting ring (202), the outer wall of the insert ring (304) is movably connected to the inner wall of the first connecting ring (201), the outer wall of the first connecting ring (201) is provided with a plurality of threaded holes (301), the inner walls of the plurality of threaded holes (301) are all threadedly connected with bolts (302), the outer wall of the insert ring (304) is provided with a plurality of positioning holes (303), and the outer walls of the plurality of bolts (302) are respectively movably connected to the inner walls of the plurality of positioning holes (303).

2. A centrifugal fan with a noise reduction structure according to claim 1, characterized in that: One end of the bolt (302) is fixedly connected to a truncated cone block (402), and the outer wall of the truncated cone block (402) is movably interlaced with the inner wall of the positioning hole (303).

3. The centrifugal fan with a noise reduction structure according to claim 1, characterized in that: A washer (401) is provided between the bolt (302) and the first connecting ring (201), and the washer (401) is sleeved on the outer wall of the bolt (302).

4. The centrifugal fan with a noise reduction structure according to claim 1, characterized in that: The front side of the first connecting ring (201) is provided with an annular groove (501), the inner wall of the annular groove (501) is movably connected with a rubber ring (502), and the front side of the rubber ring (502) and the back side of the second connecting ring (202) are arranged in an interference fit.

5. The centrifugal fan with a noise reduction structure according to claim 1, characterized in that: An air outlet duct (601) is provided on the outer wall of the shell (101), a connection frame (602) is fixedly connected to the top of the outer wall of the air outlet duct (601), and a plurality of connection holes (603) are provided at the top of the connection frame (602).

6. The centrifugal fan with a noise reduction structure according to claim 1, characterized in that: A base (701) is provided below the servo motor (102), a top end of the base (701) is fixedly connected to a mounting seat (702), and the servo motor (102) is mounted on the top end of the mounting seat (702).

7. The centrifugal fan with a noise reduction structure according to claim 1, characterized in that: The inner wall of the first connecting ring (201) is fixedly connected with a plurality of limit blocks (801), the outer wall of the inserting ring (304) is provided with a plurality of limit grooves (802), and the outer walls of the plurality of limit blocks (801) are movably connected with the inner walls of the plurality of limit grooves (802).

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