Energy-saving and noise-eliminating centrifugal fan

Abstract

The utility model relates to the field of centrifugal fans, and discloses an energy-saving noise-eliminating centrifugal fan which comprises a fixing frame, a fan shell, a side cover, a connecting mechanism and a lifting mechanism, noise-eliminating cotton is fixedly arranged at the rear end of the side cover, the connecting mechanism comprises a hollow column, a fixing column is rotationally arranged in the middle of the inner end of the hollow column, and the lifting mechanism is arranged on the fixing column. A first gear fixedly sleeves the front end of the fixed column, three rotating columns are rotatably arranged at the inner end, close to the edge, of the hollow column, second gears fixedly sleeve the upper ends of the outer sides of the three rotating columns, clamping columns fixedly sleeve the lower ends of the outer sides of the three rotating columns, and three through grooves are formed in the lower end of the outer side of the hollow column. And a spring is arranged on one side of the hollow column. According to the utility model, after the clamping column penetrates through the through groove, the hollow column cannot move backwards, so that the installation of the side cover and the fan shell is realized, the installation complexity is reduced, the production efficiency is improved, and the labor cost and time are reduced.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal fans, and in particular to an energy-saving and noise-reducing centrifugal fan. Background Technology

[0002] A centrifugal fan is a mechanical device that uses the principle of centrifugal force to increase the pressure and flow rate of gas (such as air). It draws gas in through an inlet using a rotating impeller, and the centrifugal force of the impeller accelerates and compresses the gas before expelling it through an outlet. Centrifugal fans are widely used in various industrial and civil applications, such as ventilation, air conditioning, heating, dust removal, and gas conveying.

[0003] However, conventional centrifugal fans are usually placed on a flat surface and cannot be repositioned during operation, which limits their adaptability to specific process or space requirements and restricts layout design. Moreover, the side covers and fan casings of conventional centrifugal fans are fixed with bolts, making the installation and disassembly process cumbersome, especially when regular maintenance or inspection is required, which takes a long time and reduces maintenance efficiency.

[0004] Therefore, those skilled in the art have provided an energy-saving and noise-reducing centrifugal fan to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing an energy-saving and noise-reducing centrifugal fan. This new model allows for adjustment of the fan's position during operation.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An energy-saving and noise-absorbing centrifugal fan includes a fixed frame, a fan housing, a side cover, a connecting mechanism, and a lifting mechanism. A No. 1 motor is fixedly installed at the upper end of the fixed frame, and an impeller is fixedly installed at the output end of the No. 1 motor. A fixed plate is fixedly installed at the rear end of the side cover near the edge, and sound-absorbing cotton is fixedly installed at the rear end of the side cover.

[0008] The connecting mechanism includes a hollow column, a fixed column rotatably disposed at the middle position of the inner end of the hollow column, a first gear fixedly sleeved on the front end of the fixed column, three rotating columns rotatably disposed at the edge of the inner end of the hollow column, a second gear fixedly sleeved on the upper outer end of each of the three rotating columns, a locking column fixedly sleeved on the lower outer end of each of the three rotating columns, three through slots opened on the lower outer end of the hollow column, and a spring disposed on one side of the hollow column;

[0009] The lifting mechanism includes a fixed box, a second motor is fixedly installed on one side of the fixed box, a lead screw is fixedly installed at the output end of the second motor, two movable blocks are threaded on the outer side of the lead screw, and a support rod is hinged to the upper end of the two movable blocks.

[0010] Furthermore, the impeller is rotatably disposed on the lower end of the inner side of the fan housing, and the side cover is movably disposed on the upper end of the fan housing.

[0011] Furthermore, the fan housing is rotatably connected to the output end of motor number one, and the fan housing is fixedly mounted at the front end of the fixed frame.

[0012] Furthermore, the spring is fixedly installed at the lower end of the fan housing, and the hollow column penetrates the fan housing and the fixing plate.

[0013] Furthermore, the three No. 2 gears are rotatably disposed on the inner side of the hollow column near the bottom end, and the No. 1 gear is meshed with the three No. 2 gears.

[0014] Furthermore, the three locking pins are rotatably disposed at the inner ends of the three through slots, and the three locking pins are in contact with the rear end of the fixing plate.

[0015] Furthermore, the two movable blocks are movably disposed inside the fixed box, and the two support rods are hinged to the lower end of the fixed frame.

[0016] This utility model has the following beneficial effects:

[0017] 1. This utility model proposes an energy-saving and noise-absorbing centrifugal fan. When installing the side cover and the fan housing, the hollow column is pulled backward, and the spring pushes the hollow column through the hole in the fixing plate. At this time, the fixing column is rotated. Because the first gear and the second gear mesh, the rotating column rotates, causing the locking column to rotate inside the hollow column. When the locking column passes through the through slot, the hollow column can no longer move backward, thereby realizing the installation of the side cover and the fan housing. This can reduce gas leakage and improve the working efficiency of the fan. At the same time, the sound-absorbing cotton can effectively reduce the noise during operation and improve the comfort of the working environment.

[0018] 2. The energy-saving and noise-reducing centrifugal fan proposed in this utility model, after starting the No. 2 motor, the lead screw will start to rotate, and the movable block will move towards the middle of the lead screw. When the support rod is in a vertical state, the support rod can be adjusted to the highest state, thereby raising the height of the fan casing. This allows for flexible adjustment of the height of the fan casing as needed, meeting the needs of different application scenarios and environments. Attached Figure Description

[0019] Figure 1 This is a front axonometric schematic diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the rear axle of this utility model;

[0021] Figure 3 This is a bottom isometric schematic diagram of the side cover and sound-absorbing cotton of this utility model;

[0022] Figure 4 This is an isometric schematic diagram of the connection mechanism of this utility model;

[0023] Figure 5 This is a cross-sectional schematic diagram of the connecting mechanism of this utility model;

[0024] Figure 6 This is an isometric view of the inner end of the hollow column of this utility model;

[0025] Figure 7 This is a top-view isometric schematic diagram of gear No. 1 and gear No. 2 of this utility model;

[0026] Figure 8 This is an isometric view of the fixed column, gear number one, and gear number two of this utility model;

[0027] Figure 9 This is a cross-sectional schematic diagram of the No. 1 motor and fan housing of this utility model;

[0028] Figure 10 This is a cross-sectional schematic diagram of the fixing frame and fixing box of this utility model.

[0029] Legend:

[0030] 1. Fixed frame; 2. Motor No. 1; 3. Impeller; 4. Fan housing; 5. Side cover; 6. Fixed plate; 7. Sound-absorbing cotton; 8. Connecting mechanism; 9. Lifting mechanism; 801. Hollow column; 802. Fixed column; 803. Spring; 804. Gear No. 1; 805. Rotating column; 806. Gear No. 2; 807. Locking column; 808. Through slot; 901. Fixed box; 902. Motor No. 2; 903. Lead screw; 904. Movable block; 905. Support rod. Detailed Implementation

[0031] 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.

[0032] Reference Figures 1-3 One embodiment provided by this utility model:

[0033] An energy-saving and noise-absorbing centrifugal fan includes a fixed frame 1, a fan housing 4, a side cover 5, a connecting mechanism 8, and a lifting mechanism 9. A first motor 2 is fixedly installed at the upper end of the fixed frame 1, and an impeller 3 is fixedly installed at the output end of the first motor 2. A fixed plate 6 is fixedly installed at the rear edge of the side cover 5, and a sound-absorbing cotton 7 is fixedly installed at the rear end of the side cover 5. The impeller 3 is rotatably installed inside the fan housing 4 at the lower end. The side cover 5 is movably installed at the upper end of the fan housing 4. The fan housing 4 is rotatably connected to the output end of the first motor 2, and the fan housing 4 is fixedly installed at the front end of the fixed frame 1.

[0034] Specifically, the connecting mechanism 8 of this new invention can connect the fan housing 4 to the side cover 5, and the lifting mechanism 9 can adjust the overall height of this invention. When the No. 1 motor 2 is started, the impeller 3 begins to rotate.

[0035] Reference Figures 4-8 The connecting mechanism 8 includes a hollow column 801. A fixed column 802 is rotatably mounted at the middle of the inner end of the hollow column 801. A first gear 804 is fixedly sleeved on the front end of the fixed column 802. Three rotating columns 805 are rotatably mounted on the inner end of the hollow column 801 near the edge. A second gear 806 is fixedly sleeved on the upper outer end of each of the three rotating columns 805. A locking column 807 is fixedly sleeved on the lower outer end of each of the three rotating columns 805. Three through slots 808 are opened on the lower outer end of the hollow column 801. A spring 803 is provided on one side of the hollow column 801. The spring 803 is fixedly mounted on the lower end of the fan housing 4. The hollow column 801 passes through the fan housing 4 and the fixing plate 6. The three second gears 806 are rotatably mounted on the inner side of the hollow column 801 near the bottom. The first gear 804 is meshed with the three second gears 806. The three locking columns 807 are rotatably mounted on the inner ends of the three through slots 808 respectively. The three locking columns 807 are in contact with the rear end of the fixing plate 6.

[0036] Specifically, when installing the side cover 5 and the fan housing 4, the hollow column 801 is pulled backward, and the spring 803 pushes the hollow column 801 through the hole in the fixing plate 6. At this time, the fixing column 802 is rotated. Because the first gear 804 and the second gear 806 mesh, the rotating column 805 rotates, which drives the locking column 807 to rotate inside the hollow column 801. When the locking column 807 passes through the through groove 808, the hollow column 801 can no longer move backward, thus realizing the installation of the side cover 5 and the fan housing 4. This can reduce gas leakage and improve the working efficiency of the fan. At the same time, the sound-absorbing cotton 7 can effectively reduce noise during operation and improve the comfort of the working environment.

[0037] Reference Figure 9 , Figure 10The lifting mechanism 9 includes a fixed box 901. A second motor 902 is fixedly installed on one side of the fixed box 901. A lead screw 903 is fixedly installed at the output end of the second motor 902. Two movable blocks 904 are threaded on the outer side of the lead screw 903. Support rods 905 are hinged to the upper ends of the two movable blocks 904. The two movable blocks 904 are movably installed inside the fixed box 901. The two support rods 905 are hinged to the lower end of the fixed frame 1.

[0038] Specifically, after starting the second motor 902, the lead screw 903 will start to rotate, and the movable block 904 will move towards the center of the lead screw 903. When the support rod 905 is in a vertical state, the support rod 905 can be adjusted to the highest state, thereby raising the height of the fan housing 4. This allows for flexible adjustment of the height of the fan housing 4 as needed, meeting the needs of different application scenarios and environments.

[0039] Working principle: When installing the side cover 5 and the fan housing 4, pull the hollow column 801 backward. The spring 803 pushes the hollow column 801 through the hole in the fixing plate 6. At this time, rotate the fixing column 802. Because the first gear 804 and the second gear 806 mesh, the rotating column 805 rotates, which drives the locking column 807 to rotate inside the hollow column 801. When the locking column 807 passes through the through groove 808, the hollow column 801 can no longer move backward, thus realizing the installation of the side cover 5 and the fan housing 4.

[0040] Secondly, after starting the second motor 902, the lead screw 903 will start to rotate, and the movable block 904 will move towards the middle of the lead screw 903. When the support rod 905 is in a vertical state, the support rod 905 can be adjusted to the highest state, thereby raising the height of the fan casing 4.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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. An energy-saving and noise-reducing centrifugal fan, comprising a fixed frame (1), a fan housing (4), a side cover (5), a connecting mechanism (8), and a lifting mechanism (9), characterized in that: A No. 1 motor (2) is fixedly installed at the upper end of the fixed frame (1), and an impeller (3) is fixedly installed at the output end of the No. 1 motor (2). A fixed plate (6) is fixedly installed at the rear end of the side cover (5) near the edge, and a sound-absorbing cotton (7) is fixedly installed at the rear end of the side cover (5). The connecting mechanism (8) includes a hollow column (801), a fixed column (802) is rotatably disposed at the middle position of the inner end of the hollow column (801), a first gear (804) is fixedly sleeved on the front end of the fixed column (802), three rotating columns (805) are rotatably disposed at the inner end of the hollow column (801) near the edge, a second gear (806) is fixedly sleeved on the upper outer end of each of the three rotating columns (805), a locking column (807) is fixedly sleeved on the lower outer end of the three rotating columns (805), three through slots (808) are opened on the lower outer end of the hollow column (801), and a spring (803) is disposed on one side of the hollow column (801). The lifting mechanism (9) includes a fixed box (901), a second motor (902) is fixedly installed on one side of the fixed box (901), a lead screw (903) is fixedly installed at the output end of the second motor (902), two movable blocks (904) are threaded on the outside of the lead screw (903), and a support rod (905) is hinged to the upper end of the two movable blocks (904).

2. The energy-saving and noise-reducing centrifugal fan according to claim 1, characterized in that: The impeller (3) is rotatably mounted on the lower part of the inner side of the fan housing (4), and the side cover (5) is movably mounted on the upper part of the fan housing (4).

3. The energy-saving and noise-reducing centrifugal fan according to claim 1, characterized in that: The fan housing (4) is rotatably connected to the output end of the No. 1 motor (2), and the fan housing (4) is fixedly installed at the front end of the fixed frame (1).

4. The energy-saving and noise-reducing centrifugal fan according to claim 1, characterized in that: The spring (803) is fixedly installed at the lower end of the fan housing (4), and the hollow column (801) passes through the fan housing (4) and the fixing plate (6).

5. The energy-saving and noise-reducing centrifugal fan according to claim 1, characterized in that: The three No. 2 gears (806) are rotatably disposed on the inner side of the hollow column (801) near the bottom end, and the No. 1 gear (804) meshes with the three No. 2 gears (806).

6. The energy-saving and noise-reducing centrifugal fan according to claim 1, characterized in that: The three locking pins (807) are rotatably disposed at the inner ends of the three through slots (808), and the three locking pins (807) are in contact with the rear end of the fixing plate (6).

7. The energy-saving and noise-reducing centrifugal fan according to claim 1, characterized in that: The two movable blocks (904) are movably disposed inside the fixed box (901), and the two support rods (905) are hinged to the lower end of the fixed frame (1).

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