Bidirectional double-suction type centrifugal fan

Abstract

The utility model relates to the technical field of centrifugal fans, and provides a bidirectional double-suction type centrifugal fan which comprises a fan shell, the inner wall of the fan shell is fixedly connected with two sets of supporting rods, and the ends, close to each other, of the two sets of supporting rods are jointly and fixedly connected with two bearing seats. According to the dust removal device, the motor, the driving gear, the secondary gear, the supporting rod, the bearing seat, the rotating shaft, the impeller and the air inducing cover are arranged, the bearing seat is conveniently supported through the design of the supporting rod, and at the moment, the secondary gear rotates along with the driving gear conveniently through matched use of the motor and the driving gear; according to the connection relation between a rotating shaft and a secondary gear, the rotating shaft conveniently rotates in a bearing seat and drives two impellers to rotate at the same time, due to the fact that the number of the impellers is two, air in the front direction and air in the rear direction conveniently enter the fan shell through rotation of the impellers, and air in the front direction and air in the rear direction can be conveniently exhausted through the design of an air inducing cover. And wide gas suction is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal fans, and in particular to a bidirectional double-intake 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 induction of boilers and industrial furnaces, cooling and ventilation in air conditioning equipment and household appliances, drying and conveying of grains, wind tunnel wind sources and inflation and propulsion of hovercraft, etc.

[0003] At present, centrifugal fans are widely used. However, when centrifugal fans are used, they usually inhale air in one direction, which will reduce the suction volume of the centrifugal fan. When the suction volume is reduced, the air output volume will naturally decrease, which is not conducive to current use and needs to be improved. To this end, we propose a bidirectional double-intake centrifugal fan to solve the above problems. Utility Model Content

[0004] The utility model proposes a bidirectional double-intake centrifugal fan, which solves the problem that centrifugal fans usually inhale air through one direction, which reduces the suction volume of the centrifugal fan. When the suction volume is reduced, the air output volume naturally becomes less, which is not conducive to current use and needs to be improved.

[0005] The technical solution of the utility model is as follows:

[0006] A bidirectional double-intake centrifugal fan comprises a fan housing, the inner wall of the fan housing is fixedly connected to two groups of support rods, the ends of the two groups of support rods close to each other are commonly fixedly connected to two bearing seats, the inner rings of the two bearing seats are commonly fixedly connected to a rotating shaft, the outer surface of the rotating shaft is fixedly connected to two impellers, the inner wall of the fan housing is fixedly connected to a motor, the output end of the motor is fixedly connected to a driving gear, the front end of the rotating shaft is fixedly connected to a secondary gear, the secondary gear is meshed with the driving gear, and the front and back sides of the fan housing are fixedly connected to an air hood.

[0007] Two support plates are fixedly connected to the outer surface of the fan housing, a mounting plate is fixedly connected to the bottom surfaces of the two support plates, and two groups of mounting holes are opened on the upper surface of the mounting plate.

[0008] A warning sign is arranged on the left side of the fan housing, and the bottom surface of the warning sign is fixedly connected to the upper surface of the mounting plate.

[0009] The outer surface of the fan housing is fixedly connected to two fixing plates, and rolling bearings are fixedly embedded on the side faces of the two fixing plates away from each other. The inner ring of each rolling bearing is fixedly connected to a threaded rod, and an internal threaded ring is provided on the side faces of the two fixing plates away from each other.

[0010] A product label is arranged above the fan housing, and a bottom surface of the product label is fixedly connected to an upper surface of the fan housing.

[0011] A protective net is provided on the side of the two induced draft hoods which are away from each other, and the outer surface of each protective net is fixedly connected to the outer surface of the internal threaded ring.

[0012] The beneficial effects of the utility model are:

[0013] In the utility model, a motor, a driving gear, a secondary gear, a support rod, a bearing seat, a rotating shaft, an impeller and an induced draft hood are provided. The design of the support rod is used to support the bearing seat. At this time, the motor and the driving gear are used in coordination to facilitate the secondary gear to rotate along with the driving gear. Then, according to the connection relationship between the rotating shaft and the secondary gear, the rotating shaft rotates inside the bearing seat and drives the two impellers to rotate. Since two impellers are provided, the rotation of the impellers facilitates the gas in the front and rear directions to enter the inside of the fan casing. Then, the design of the induced draft hood is used to facilitate the widespread inhalation of gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of a bidirectional double-intake centrifugal fan of the utility model;

[0016] Figure 2 It is a three-dimensional structural schematic diagram of a top view of a fan housing of a bidirectional double-intake centrifugal fan of the utility model;

[0017] Figure 3 It is a three-dimensional structural schematic diagram of a side view of a fan housing of a bidirectional double-intake centrifugal fan of the utility model;

[0018] Figure 4 It is a cross-sectional view of a top view of a fan casing of a bidirectional double-intake centrifugal fan of the utility model.

[0019] In the figure: 1. Mounting hole; 2. Mounting plate; 3. Protective net; 4. Fixing plate; 5. Fan casing; 6. Support plate; 7. Warning sign; 8. Internal threaded ring; 9. Rolling bearing; 10. Threaded rod; 11. Product label; 12. Draft hood; 13. Motor; 14. Secondary gear; 15. Impeller; 16. Support rod; 17. Bearing seat; 18. Driving gear; 19. Rotating shaft. DETAILED DESCRIPTION

[0020] The following will be combined with 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 of 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.

[0021] Embodiment 1

[0022] like Figure 1 to Figure 4 As shown, the present embodiment proposes a bidirectional double-intake centrifugal fan, comprising a fan casing 5, the inner wall of which is fixedly connected with two groups of support rods 16, the ends of the two groups of support rods 16 close to each other are commonly fixedly connected with two bearing seats 17, the inner rings of the two bearing seats 17 are commonly fixedly connected with a rotating shaft 19, the outer surface of the rotating shaft 19 is fixedly connected with two impellers 15, the inner wall of the fan casing 5 is fixedly connected with a motor 13, the output end of the motor 13 is fixedly connected with a driving gear 18, the front end of the rotating shaft 19 is fixedly connected with a secondary driving gear 14, the secondary driving gear 14 is meshed with the driving gear 18, and the front and back sides of the fan casing 5 are fixedly connected with an air hood 12.

[0023] In this embodiment, the design of the support rod 16 is utilized to facilitate supporting the bearing seat 17. At this time, the motor 13 and the driving gear 18 are used in coordination to facilitate the secondary gear 14 to rotate following the driving gear 18. Then, according to the connection relationship between the rotating shaft 19 and the secondary gear 14, the rotating shaft 19 is convenient for rotating inside the bearing seat 17 while driving the two impellers 15 to rotate. Since two impellers 15 are provided, the rotation of the impeller 15 facilitates the gas in the front and rear directions to enter the fan housing 5. Then, the design of the induced draft hood 12 facilitates the extensive inhalation of gas.

[0024] Embodiment 2

[0025] like Figure 1 to Figure 4As shown, based on the same concept as the above-mentioned embodiment 1, this embodiment further proposes that the outer surface of the fan housing 5 is fixedly connected with two support plates 6, the bottom surfaces of the two support plates 6 are commonly fixedly connected with a mounting plate 2, the upper surface of the mounting plate 2 is provided with two groups of mounting holes 1, a warning sign 7 is provided on the left side of the fan housing 5, the bottom surface of the warning sign 7 is fixedly connected to the upper surface of the mounting plate 2, the outer surface of the fan housing 5 is fixedly connected with two fixing plates 4, the side surfaces of the two fixing plates 4 away from each other are fixedly inlaid with rolling bearings 9, the inner ring of each rolling bearing 9 is fixedly connected with a threaded rod 10, and the side surfaces of the two fixing plates 4 away from each other are provided with an internal threaded ring 8.

[0026] In this embodiment, the cooperation of the mounting hole 1, the mounting plate 2 and the mounting screws facilitates the installation of the centrifugal fan at the use position, the warning sign 7 facilitates the reminder of the staff, and the cooperation of the threaded rod 10 and the internal threaded ring 8 facilitates the installation of the protective net 3 by the staff.

[0027] A product label 11 is provided above the fan housing 5, and the bottom surface of the product label 11 is fixedly connected to the upper surface of the fan housing 5. A protective net 3 is provided on the side of the two air hoods 12 away from each other, and the outer surface of each protective net 3 is fixedly connected to the outer surface of the internal threaded ring 8.

[0028] In this embodiment, the product label 11 is used to help users understand the product, and the protective net 3 can achieve the purpose of protection.

[0029] The working principle of the utility model is: when the staff uses it, first rotate the threaded rod 10 to rotate inside the rolling bearing 9, then make the internal thread ring 8 and the threaded rod 10 threadedly connected, and install the protective net 3 on the induced draft cover 12, and then install the centrifugal fan in the use position through the cooperation of the mounting hole 1, the mounting plate 2 and the mounting screws, then connect the centrifugal fan with the power supply, start the motor 13 after power is turned on, use the power provided by the motor 13 to drive the driving gear 18 to rotate, and through the meshing relationship between the driving gear 18 and the secondary gear 14, drive the rotating shaft 19 to rotate inside the bearing seat 17, and use the rotating shaft 19 to drive the impeller 15 to work, at this time, the outside air enters through the induced draft cover 12, and the air outlet is used to discharge the gas.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. 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.

[0031] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A bidirectional double-intake centrifugal fan, characterized in that: The invention comprises a fan housing (5), wherein the inner wall of the fan housing (5) is fixedly connected to two groups of support rods (16), the ends of the two groups of support rods (16) close to each other are fixedly connected to two bearing seats (17), the inner rings of the two bearing seats (17) are fixedly connected to a rotating shaft (19), the outer surface of the rotating shaft (19) is fixedly connected to two impellers (15), the inner wall of the fan housing (5) is fixedly connected to a motor (13), the output end of the motor (13) is fixedly connected to a driving gear (18), the front end of the rotating shaft (19) is fixedly connected to a secondary gear (14), the secondary gear (14) is meshed with the driving gear (18), and the front and back sides of the fan housing (5) are fixedly connected to an air hood (12).

2. A bidirectional double-intake centrifugal fan according to claim 1, characterized in that: Two support plates (6) are fixedly connected to the outer surface of the fan housing (5), the bottom surfaces of the two support plates (6) are commonly fixedly connected to a mounting plate (2), and the upper surface of the mounting plate (2) is provided with two groups of mounting holes (1).

3. The bidirectional double-intake centrifugal fan according to claim 1, characterized in that: A warning sign (7) is provided on the left side of the fan housing (5), and the bottom surface of the warning sign (7) is fixedly connected to the upper surface of the mounting plate (2).

4. The bidirectional double-intake centrifugal fan according to claim 1, characterized in that: Two fixing plates (4) are fixedly connected to the outer surface of the fan housing (5); rolling bearings (9) are fixedly embedded on the side faces of the two fixing plates (4) away from each other; the inner ring of each rolling bearing (9) is fixedly connected to a threaded rod (10); and an internal threaded ring (8) is provided on the side faces of the two fixing plates (4) away from each other.

5. The bidirectional double-intake centrifugal fan according to claim 1, characterized in that: A product label (11) is provided above the fan housing (5), and the bottom surface of the product label (11) is fixedly connected to the upper surface of the fan housing (5).

6. The bidirectional double-intake centrifugal fan according to claim 1, characterized in that: A protective net (3) is provided on the side of the two induced draft hoods (12) that is away from each other, and the outer surface of each protective net (3) is fixedly connected to the outer surface of the internal threaded ring (8).

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