An energy-saving centrifugal fan with ultra-low noise

Abstract

The application relates to the technical field of centrifugal fans with ultra-low noise, and discloses an energy-saving centrifugal fan with ultra-low noise, which comprises a lubricating driving structure, a second shell and an oil pipe, an oil groove is arranged in the output shaft of a motor, and lubricating oil in the second shell is led to a supporting plate and a first bearing through the oil pipe and the oil groove. Through the arrangement of the lubricating driving structure, the lubricating oil is output to an oil outlet hole in the rotating process, a rotating shaft of a driven gear drives the clearance rotation of a stop block, so that the stop block intermittently opens and closes the oil outlet hole, the rotating shaft of the driven gear drives the rotation of a push plate, the lubricating oil is pushed, the lubricating oil is delivered to the inside of the oil pipe to supply the lubricating oil, the lubricating oil flows to the inner sides of the first bearing and the second bearing through the oil pipe and the oil groove, and the lubricating oil is saved while being lubricated through the cooperation of the clearance structure.

Description

Technical Field

[0001] This invention relates to the technical field of ultra-low noise centrifugal fan equipment, specifically to an ultra-low noise energy-saving centrifugal fan. Background Technology

[0002] A centrifugal fan includes a fan body with an internal cavity and an air inlet on the side communicating with the cavity. The fan body also has an air outlet at the bottom communicating with the cavity. An impeller is also present inside the fan body. During impeller rotation, airflow smoothly enters the fan body and is output rapidly through the outlet. Because the air inlet and outlet of the centrifugal fan are staggered, the centrifugal fan generates considerable noise during operation.

[0003] Application number 202210139416.6 discloses an ultra-low noise energy-saving centrifugal fan, including a housing, a connecting cylinder, and a connecting rod. The housing has an internal cavity with an opening at the right end and a through inlet on the side. After the housing is fitted onto the fan body, the inlet is connected to the air inlet of the fan body. The connecting cylinder is cylindrical and horizontally arranged. The impedance silencer is tightly fitted inside the connecting cylinder. The connecting cylinder is connected to the housing via the connecting rod, and the air outlet of the fan body is directly connected to the impedance silencer. This ultra-low noise energy-saving centrifugal fan has high stability.

[0004] Although this setup results in a highly stable, ultra-low-noise energy-saving centrifugal fan, the impedance silencer and casing can reduce noise to some extent for the fan and motor. However, during the rotation of the fan impeller driven by the motor shaft, the friction between the fan shaft and bearings and other mechanical components will generate noise. This is especially true at high speeds, where the wear on the bearings will increase and the friction will produce more noticeable noise. Summary of the Invention

[0005] The purpose of this invention is to provide an ultra-low noise, energy-saving centrifugal fan to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0007] The present invention is an energy-saving centrifugal fan with ultra-low noise, including a support assembly, wherein a drive assembly, a housing and a lubrication drive structure are mounted on the top of the support assembly;

[0008] The outer wall of the housing is provided with an air inlet and an air outlet;

[0009] The drive assembly includes a motor, an impeller, and a duckbill. The impeller and the duckbill are installed inside the housing, and the motor drives the impeller and the duckbill through an output shaft.

[0010] The motor has a first bearing and a second bearing installed on its output shaft.

[0011] The lubrication drive structure includes a second housing and an oil pipe. An oil groove is provided inside the output shaft of the motor. The lubricating oil inside the second housing is delivered to the support plate and the first bearing through the oil pipe and the oil groove.

[0012] The purpose of this design is to lubricate the first and second bearings through a lubrication drive structure, thereby reducing wear.

[0013] Furthermore, the support assembly includes a flat plate, on the upper surface of which a first support plate and two second support plates are mounted. The motor is mounted on top of the first support plate, and the housing is mounted on top of the two second support plates. The output shaft of the motor extends into the interior of the housing.

[0014] The impeller is mounted on the output shaft of the motor, and a duckbill is provided inside the impeller;

[0015] The purpose of this design is to drive the impeller and the duckbill to rotate through the output shaft of the motor, so that the airflow enters from the air inlet, passes through the inside of the casing, and flows out to the air outlet.

[0016] Furthermore, the first bearing is installed between the motor output shaft and the housing, and several support plates are connected to the inner wall of the housing. The second bearing is installed between the support plates and the motor output shaft. The purpose of this arrangement is to allow the motor output shaft to rotate while simultaneously lubricating the first and second bearings.

[0017] Furthermore, a number of guide plates are installed at one end of the output shaft of the motor, and the guide plates are located at the port of the housing. The purpose of this arrangement is that when the output end of the motor rotates, it drives the guide plates to rotate, and the external airflow is introduced through the guide plates. During the introduction process, turbulence is prevented, thereby reducing airflow noise.

[0018] Furthermore, the oil groove extends to the inner side of the first and second bearings, and the purpose of this arrangement is to allow lubricating oil to flow to the inner side of the first and second bearings.

[0019] Furthermore, an intermittent gear is installed on the outer wall of the output shaft of the motor, and the lubrication drive structure also includes a driven gear. The second housing is installed on the outer wall of the motor, and the driven gear is rotatably connected to the outer wall of the second housing. The driven gear meshes with the intermittent gear with a clearance. An oil inlet is provided on the upper surface of the second housing for adding lubricating oil.

[0020] The purpose of this setup is to drive the intermittent gear through the motor's output shaft, thereby causing the driven gear to rotate intermittently.

[0021] Furthermore, the driven gear's shaft extends into the interior of the second housing, a helical rod is mounted on the outer wall of the driven gear's shaft, an oil separator is mounted on the outer wall of the second housing, and the driven gear's shaft extends into the interior of the oil separator.

[0022] The purpose of this design is to allow the driven gear shaft to rotate with clearance, thereby driving the screw rod to rotate with clearance. During this rotation, lubricating oil is output to the oil outlet.

[0023] Furthermore, an oil outlet hole is provided between the second housing and the oil distribution housing. A stop block for opening and closing the oil outlet hole is installed on the shaft of the driven gear. Several push plates are installed on the outer wall of the driven gear shaft. Several push plates are located inside the oil distribution housing. The oil distribution housing is connected to the oil tank through an oil pipe.

[0024] The purpose of this design is to allow the driven gear shaft to rotate the stop block intermittently, thereby allowing the stop block to intermittently open and close the oil outlet. The driven gear shaft drives the push plate to rotate, pushing the lubricating oil and delivering it into the oil pipe for lubrication.

[0025] Furthermore, a buffer structure is installed at the bottom of the support assembly. The buffer structure includes a base plate and a moving groove. A plurality of moving grooves are provided on the lower surface of the plate. An oil distribution pipe is connected to the outer wall of the oil separator. The oil distribution pipe is connected to the moving groove. A second sliding plate and a first sliding plate are slidably connected on the inner wall of the moving groove. A spring is installed between the second sliding plate and the first sliding plate. The second sliding plate is located at the top of the spring. A sliding rod is connected to the lower surface of the first sliding plate, which extends through the moving groove to the outside and connects with the base plate.

[0026] The purpose of this design is that during the intermittent rotation of the screw rod, as the lubricating oil is output to the oil outlet, a portion of the lubricating oil flows into the oil distribution pipe and the cavity between the second sliding plate and the moving groove, forming oil pressure. When the moving groove is vibrated, the oil pressure surface disperses the vibration wave, which is then absorbed by the compression spring of the second sliding plate, thereby reducing vibration.

[0027] The present invention has the following beneficial effects:

[0028] (1) The present invention, through the setting of the lubrication drive structure, the motor output end rotates, which drives the guide plate to rotate, and the external airflow is introduced through the guide plate. During the introduction process, turbulence is prevented, thereby reducing airflow noise. The guide plate can reduce the turbulence and turbulence generated when the air flows from different directions, thereby reducing the noise level. The upper surface of the second housing is provided with an oil inlet for adding lubricating oil. The output shaft of the motor drives the intermittent gear, thereby causing the driven gear to rotate intermittently. The shaft of the driven gear rotates intermittently, which drives the screw rod to rotate intermittently. During the rotation, the lubricating oil is output to the oil outlet. The shaft of the driven gear rotates intermittently on the stop block, thereby allowing the stop block to intermittently open and close the oil outlet. The shaft of the driven gear drives the push plate to rotate, which pushes the lubricating oil and delivers the lubricating oil to the inside of the oil pipe for lubrication. The lubricating oil flows to the inside of the first bearing and the second bearing through the oil pipe and the oil groove. With the cooperation of the gap structure, lubricating oil is saved while lubricating.

[0029] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. 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 effort.

[0031] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the side structure of the present invention;

[0033] Figure 3 This is a schematic diagram of the internal structure of the present invention;

[0034] Figure 4 This is a partial structural diagram of the present invention;

[0035] Figure 5 This is a schematic diagram of the internal structure of the present invention;

[0036] Figure 6 This is a schematic diagram of the lubrication drive structure of the present invention;

[0037] Figure 7 This is a schematic diagram of the lubrication drive structure of the present invention;

[0038] The attached diagram lists the components represented by each number as follows:

[0039] In the diagram: 1. Support assembly; 101. Flat plate; 102. First support plate; 103. Second support plate; 2. Drive assembly; 201. Motor; 2011. Oil tank; 202. Intermittent gear; 203. Impeller; 204. Duck tongue; 205. Guide plate; 3. Housing; 4. Lubrication drive structure; 40. Oil distribution pipe; 400. Oil distribution shell; 401. Second housing; 402. Driven gear; 403. Oil pipe; 404. Push plate; 405. Stop block; 406. Helical rod; 407. Oil outlet; 5. Buffer structure; 501. Base plate; 502. First sliding plate; 503. Spring; 504. Second sliding plate; 505. Moving groove; 6. Support plate; 7. First bearing; 8. Second bearing. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Please see Figure 1 - Figure 7 As shown, the present invention is an energy-saving centrifugal fan with ultra-low noise, including a support assembly 1, a drive assembly 2, a housing 3 and a lubrication drive structure 4 installed on the top of the support assembly 1;

[0042] An air inlet and an air outlet are provided on the outer wall of the housing 3;

[0043] Drive assembly 2 includes motor 201, impeller 203 and duckbill 204. Impeller 203 and duckbill 204 are installed inside housing 3. Motor 201 drives impeller 203 and duckbill 204 through output shaft.

[0044] The output shaft of motor 201 is equipped with a first bearing 7 and a second bearing 8.

[0045] The lubrication drive structure 4 includes a second housing 401 and an oil pipe 403. An oil groove 2011 is provided inside the output shaft of the motor 201. The lubricating oil inside the second housing 401 is delivered to the support plate 6 and the first bearing 7 through the oil pipe 403 and the oil groove 2011.

[0046] The purpose of this arrangement is to lubricate the first bearing 7 and the second bearing 8 through the lubrication drive structure 4, thereby reducing wear.

[0047] The support assembly 1 includes a flat plate 101, on the upper surface of which a first support plate 102 and two second support plates 103 are mounted. A motor 201 is mounted on the top of the first support plate 102, and a housing 3 is mounted on the top of the two second support plates 103. The output shaft of the motor 201 extends into the interior of the housing 3.

[0048] Impeller 203 is mounted on the output shaft of motor 201, and duckbill 204 is provided inside impeller 203;

[0049] The purpose of this configuration is to drive the impeller 203 and the duckbill 204 to rotate through the output shaft of the motor 201, so that the airflow enters from the air inlet, passes through the inside of the housing 3, and flows out to the air outlet.

[0050] The first bearing 7 is installed between the output shaft of the motor 201 and the housing 3. Several support plates 6 are connected to the inner wall of the housing 3. The second bearing 8 is installed between the support plate 6 and the output shaft of the motor 201. The purpose of this arrangement is to allow the output shaft of the motor 201 to rotate, while lubricating the first bearing 7 and the second bearing 8.

[0051] Several guide plates 205 are installed at one end of the output shaft of the motor 201. The guide plates 205 are located at the port of the housing 3. The purpose of this arrangement is that when the output end of the motor 201 rotates, it drives the guide plates 205 to rotate, and the external airflow is introduced through the guide plates 205. During the introduction process, turbulence is prevented, thereby reducing airflow noise.

[0052] The oil groove 2011 extends to the inside of the first bearing 7 and the second bearing 8. The purpose of this arrangement is to allow lubricating oil to flow to the inside of the first bearing 7 and the second bearing 8.

[0053] An intermittent gear 202 is mounted on the outer wall of the output shaft of the motor 201. The lubrication drive structure 4 also includes a driven gear 402. The second housing 401 is mounted on the outer wall of the motor 201. The driven gear 402 is rotatably connected to the outer wall of the second housing 401. The driven gear 402 and the intermittent gear 202 are meshed with each other with a clearance. An oil inlet is provided on the upper surface of the second housing 401 for adding lubricating oil.

[0054] The purpose of this configuration is to drive the intermittent gear 202 through the output shaft of the motor 201, thereby causing the driven gear 402 to rotate intermittently.

[0055] The driven gear 402's shaft extends into the interior of the second housing 401. A helical rod 406 is installed on the outer wall of the driven gear 402's shaft. An oil separator 400 is installed on the outer wall of the second housing 401. The driven gear 402's shaft extends into the interior of the oil separator 400.

[0056] The purpose of this configuration is to allow the driven gear 402 to rotate with a gap, thereby driving the screw rod 406 to rotate with a gap. During the rotation, lubricating oil is output to the oil outlet 407.

[0057] An oil outlet 407 is provided between the second housing 401 and the oil distribution housing 400. A stop 405 for opening and closing the oil outlet 407 is installed on the shaft of the driven gear 402. Several push plates 404 are installed on the outer wall of the shaft of the driven gear 402. The several push plates 404 are located inside the oil distribution housing 400. The oil distribution housing 400 is connected to the oil tank through the oil pipe 403.

[0058] The purpose of this arrangement is to allow the driven gear 402 to rotate the stop 405 with a gap, thereby allowing the stop 405 to intermittently open and close the oil outlet 407. The driven gear 402's shaft drives the push plate 404 to rotate, pushing the lubricating oil and delivering it to the inside of the oil pipe 403 for lubrication.

[0059] A buffer structure 5 is installed at the bottom of the support component 1. The buffer structure 5 includes a base plate 501 and a moving groove 505. A number of moving grooves 505 are provided on the lower surface of the plate 101. An oil distribution pipe 40 is connected to the outer wall of the oil distribution shell 400. The oil distribution pipe 40 is connected to the moving groove 505. A second sliding plate 504 and a first sliding plate 502 are slidably connected on the inner wall of the moving groove 505. A spring 503 is installed between the second sliding plate 504 and the first sliding plate 502. The second sliding plate 504 is located at the top of the spring 503. A sliding rod is connected to the lower surface of the first sliding plate 502, which extends through the moving groove 505 to the outside and connects with the base plate 501.

[0060] The purpose of this design is that during the intermittent rotation of the screw rod 406, when the lubricating oil is output to the oil outlet 407, a portion of the lubricating oil flows into the oil distribution pipe 40 and the cavity between the second sliding plate 504 and the moving groove 505, forming oil pressure. When the moving groove 505 is vibrated, the oil pressure surface disperses the vibration wave, and the second sliding plate 504 compresses the spring 503 to absorb it, thereby reducing vibration.

[0061] In use, the output end of motor 201 rotates, driving the guide plate 205 to rotate. The guide plate 205 guides external airflow, preventing turbulence during the process and reducing airflow noise. The guide plate 205 reduces turbulence and disturbances generated during airflow from different directions, thus lowering the noise level. An oil inlet is provided on the upper surface of the second housing 401 for adding lubricating oil. The output shaft of motor 201 drives the intermittent gear 202, causing the driven gear 402 to rotate intermittently. The shaft of the driven gear 402 rotates intermittently, driving the screw rod 406 to rotate intermittently. During rotation, lubricating oil is output to the oil outlet 407. The shaft of the driven gear 402 rotates intermittently on the stop block 405, thus allowing the stop block... 405 intermittently opens and closes the oil outlet 407. The driven gear 402's shaft drives the push plate 404 to rotate, pushing the lubricating oil and delivering it to the inside of the oil pipe 403 for lubrication. The lubricating oil then flows through the oil pipe 403 and the oil groove to the inside of the first bearing 7 and the second bearing 8. With the intermittent structure, lubrication is saved while lubrication is achieved. During the intermittent rotation of the screw rod 406, as the lubricating oil is output to the oil outlet 407, a portion of the lubricating oil flows into the oil distribution pipe 40 and the cavity between the second sliding plate 504 and the moving groove 505, forming oil pressure. When the moving groove 505 is vibrated, the oil pressure surface disperses the vibration wave, which is absorbed by the compression spring 503 of the second sliding plate 504, thereby reducing vibration.

[0062] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An ultra-low noise energy saving centrifugal fan, characterized by, The utility model relates to a kind of lubricating drive structure and its driving method, including: Supporting assembly (1), the top of the supporting assembly (1) is equipped with driving assembly (2), shell (3) and lubricating drive structure (4); Air inlet and air outlet are provided on the outer wall of the shell (3); The driving assembly (2) includes motor (201), impeller (203) and duck tongue (204), the impeller (203) and duck tongue (204) are installed inside the shell (3), the motor (201) is driven to the impeller (203) and duck tongue (204) by output shaft; The output shaft of the motor (201) is equipped with first bearing (7) and second bearing (8); The lubricating drive structure (4) includes second shell (401) and oil pipe (403), the output shaft inside the motor (201) is provided with oil groove (2011), lubricating oil in the second shell (401) is communicated to first bearing (7) and second bearing (8) by oil pipe (403) and oil groove (2011); The output shaft of the motor (201) is equipped with a plurality of guide vanes (205), a plurality of the guide vanes (205) are at the port of the shell (3), a plurality of the guide vanes (205) are surrounded into conical cylinder, and the end of the larger opening of the conical cylinder is towards the airflow direction; The oil groove (2011) extends to the inside of first bearing (7) and second bearing (8); The output shaft outer wall of the motor (201) is equipped with intermittent gear (202), the lubricating drive structure (4) further includes driven gear (402), the second shell (401) is installed on the outer wall of the motor (201), the driven gear (402) is rotatably connected on the outer wall of the second shell (401), the driven gear (402) is engaged with intermittent gear (202) with clearance, the upper surface of the second shell (401) is provided with oil inlet; The rotating shaft of the driven gear (402) extends to the inside of the second shell (401), the rotating shaft outer wall of the driven gear (402) is equipped with screw rod (406), the outer wall of the second shell (401) is equipped with oil distribution shell (400), the rotating shaft of the driven gear (402) extends to the inside of the oil distribution shell (400); Oil outlet (407) is arranged between the second shell (401) and the oil distribution shell (400), the rotating shaft of the driven gear (402) is equipped with stop block (405) for opening and closing oil outlet (407), the rotating shaft outer wall of the driven gear (402) is equipped with a plurality of push plates (404), a plurality of the push plates (404) are in the inside of the oil distribution shell (400), the oil distribution shell (400) is communicated with oil groove by oil pipe (403); The bottom of the support assembly (1) is provided with a buffer structure (5), the buffer structure (5) comprises a bottom plate (501) and a moving groove (505), the support assembly (1) comprises a flat plate (101), the lower surface of the flat plate (101) is provided with a plurality of moving grooves (505), the outer wall of the oil distribution shell (400) is communicated with an oil distribution pipeline (40), the oil distribution pipeline (40) and the moving groove (505) are communicated with each other, the inner wall of the moving groove (505) is slidably connected with a second sliding plate (504) and a first sliding plate (502), the second sliding plate (504) and the first sliding plate (502) are provided with a spring (503), the second sliding plate (504) is located at the top of the spring (503), the lower surface of the first sliding plate (502) is connected with a sliding rod, which extends through the moving groove (505) to the outside and is connected with the bottom plate (501).

2. A super low noise energy saving centrifugal fan as claimed in claim 1, wherein: The upper surface of the flat plate (101) is provided with a first support plate (102) and two second support plates (103), the motor (201) is installed on the top of the first support plate (102), and the shell (3) is installed on the top of the two second support plates (103), and the output shaft of the motor (201) extends to the inside of the shell (3). The impeller (203) is installed on the output shaft of the motor (201), and the inside of the impeller (203) is provided with a duck tongue (204).

3. A super low noise energy saving centrifugal fan as claimed in claim 1, wherein: The first bearing (7) is installed between the output shaft of the motor (201) and the shell (3), a plurality of support plates (6) are connected to the inner wall of the shell (3), and the second bearing (8) is installed between the support plate (6) and the output shaft of the motor (201).

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