Centrifugal blower

Abstract

The utility model relates to the technical field of air feeders, in particular to a centrifugal air feeder which is efficient in conversion, stable in air flow, high in adjustability and adaptability and easy to maintain. Comprising a driving mechanism, a reverser is arranged at the output end of the driving mechanism, an impeller is arranged at the output end of the reverser, and the driving mechanism drives the reverser and the impeller to rotate; the impeller comprises a main plate, a plurality of wings are arranged on the main plate, the wings are distributed on the edge of the main plate in the circumferential direction, a certain angle is formed between the chord lines of the wings and the plane of the main plate, side plates corresponding to the wings are arranged on the main plate, and the side plates are connected with the wings. The outer side of the impeller is provided with a volute, the volute is provided with an air suction port and an air blowing port, and the volute forms a flow path of air flow generated by rotation of the impeller.

Description

Technical Field

[0001] The utility model relates to the technical field of air blowers, in particular to a centrifugal air blower. Background Art

[0002] A blower is a power device used to deliver air to a specific space or system. Its main purpose is to provide the required air flow to meet various air treatment needs such as ventilation, air exchange, heating, cooling, dehumidification, purification, etc. Centrifugal blowers are the most common type of blowers. They are mechanical devices that use the principle of centrifugal force to increase air flow pressure and speed. They are widely used in various occasions that require high-efficiency and high-pressure ventilation, such as building air conditioning systems, industrial ventilation systems, environmental protection equipment, etc.

[0003] The existing centrifugal blower has a fan housed in a scroll housing, and a spiral flow path is formed around the fan in the scroll housing. When the fan is rotated by a motor, the air on the radial inner side of the blade is discharged to the radial outer side, so that the air passes through the flow path and is blown out from the blow-out port formed on the downstream side. In this case, when a large amount of air flows between the spiral end and the spiral start end of the spiral flow path, the air supply volume decreases and the air supply efficiency decreases. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a centrifugal blower with high efficiency conversion, stable airflow, strong adjustability and adaptability, and easy maintenance.

[0005] The utility model discloses a centrifugal blower, comprising:

[0006] A driving mechanism, wherein a commutator is provided at an output end of the driving mechanism, an impeller is provided at an output end of the commutator, and the driving mechanism drives the commutator and the impeller to rotate;

[0007] The impeller comprises a main board, a plurality of wings are arranged on the main board, the wings are arranged circumferentially and distributed on the edge of the main board, the chord of the wings forms a certain angle with the plane of the main board, the main board is provided with side plates corresponding to the wings, and the side plates are connected to the wings;

[0008] A scroll housing is provided outside the impeller. The scroll housing is provided with an air intake port and an air outlet port, and forms a flow path of an air flow generated by the rotation of the impeller.

[0009] Furthermore, a vortex portion is provided on the volute, and an end portion of the vortex portion and a connection portion with the volute are smoothly curved.

[0010] Furthermore, the opening diameter of the vortex portion gradually decreases toward the connection with the volute casing.

[0011] Furthermore, a connection between the swirl portion and the volute casing forms a certain angle with a horizontal reference plane.

[0012] Furthermore, a plurality of protrusions are provided on the vortex portion, and the protrusions extend on the inner wall of the vortex portion along the direction of the air flow.

[0013] Furthermore, a buffer curved surface is provided on the volute.

[0014] Furthermore, a filter screen is provided on the volute, and the filter screen is detachably installed.

[0015] Furthermore, an induction alarm is provided on the volute casing, and the induction alarm is electrically connected to the driving mechanism.

[0016] Furthermore, sound absorbing material is arranged in the volute.

[0017] Furthermore, it also includes a bracket, which is connected to the driving mechanism, the commutator and the volute.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The driving mechanism drives the impeller to rotate directly through the commutator, and the power transmission path is short, which reduces energy loss and improves energy conversion efficiency. The impeller structure is reasonably designed, and the wings are evenly distributed and tilted along the circumference, which is conducive to generating strong centrifugal force during rotation, promoting air to flow faster and improving the overall aerodynamic performance and air supply efficiency of the fan. Through the side panels, each wing forms a closed flow channel structure with the main board and the side panels, which can guide the airflow to flow along a predetermined path, avoid airflow turbulence, enhance airflow stability, reduce noise, and help improve the working efficiency of the fan. At the same time, it helps to reduce eddy loss at the wing end and further improve the aerodynamics of the fan. The volute wraps the outer side of the impeller to form a closed air flow path, which effectively prevents air from flowing. The air flow is clear and there is no backflow or short circuit, which improves the air supply efficiency and working stability of the fan. The commutator is used as the connecting component between the driving mechanism and the impeller, and the rotation direction of the impeller can be adjusted as needed to adapt to different installation positions or air supply requirements. By adjusting the inclination angle of the blades or replacing impellers of different specifications, the performance parameters of the fan, such as air volume and air pressure, can be flexibly adjusted to meet the use requirements under different working conditions. At the same time, the connections between the components are clear, easy to disassemble and repair, and reduce the difficulty and cost of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1It is a structural schematic diagram of the utility model;

[0022] Figure 2 It is a structural schematic diagram of the utility model;

[0023] Figure 3 It is a structural schematic diagram of the impeller of the utility model;

[0024] Markings in the attached drawings: 1. driving mechanism; 2. commutator; 3. impeller; 4. volute; 5. main board; 6. wing; 7. side plate; 8. vortex part; 9. protrusion; 10. buffer curved surface; 11. bracket; 12. filter. DETAILED DESCRIPTION

[0025] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] like Figures 1 to 3 As shown, a centrifugal blower of the utility model comprises a driving mechanism 1, a commutator 2 is arranged at the output end of the driving mechanism 1, an impeller 3 is arranged at the output end of the commutator 2, and the driving mechanism 1 drives the commutator 2 and the impeller 3 to rotate; the impeller 3 comprises a main board 5, a plurality of wings 6 are arranged on the main board 5, the wings 6 are arranged and distributed on the edge of the main board 5 along the circumferential direction, the chord of the wings 6 forms a certain angle with the plane of the main board 5, and the main board 5 is provided with a side plate 7 corresponding to the wings 6, and the side plate 7 is connected to the wings 6; a volute 4 is arranged on the outer side of the impeller 3, and an air suction port and an air blowing port are arranged on the volute 4, and a flow path of the air flow generated by the rotation of the impeller 3 is formed;

[0027] The driving mechanism 1 directly drives the impeller 3 to rotate through the commutator 2, and the power transmission path is short, which reduces energy loss and improves energy conversion efficiency; the impeller structure is reasonably designed, and the wings 6 are evenly distributed and inclined along the circumference, which is conducive to generating strong centrifugal force during rotation, promoting air to flow faster, and improving the overall aerodynamic performance and air supply efficiency of the fan; each wing 6 is formed with the main board 5 and the side plate 7 through the side plate to form a closed flow channel structure, which can guide the airflow to flow along a predetermined path, avoid airflow turbulence, enhance airflow stability, reduce noise, and help improve the working efficiency of the fan, while helping to reduce the eddy loss at the end of the wing 6, and further improve the aerodynamics of the fan; the volute wraps the outer side of the impeller to form a closed air flow path, effectively preventing Prevent air leakage and ensure the stability of the fan's air supply and air pressure; the clear division of the suction port and the blowout port ensures that the air enters from the suction port and is discharged from the blowout port after being accelerated by the impeller 3. The air flow direction is clear during the whole process, without backflow or short circuit, thereby improving the air supply efficiency and working stability of the fan; by using the commutator 2 as a connecting component between the driving mechanism 1 and the impeller 3, the rotation direction of the impeller 3 can be adjusted as needed to adapt to different installation positions or air supply requirements; by adjusting the inclination angle of the blades or replacing impellers of different specifications, the fan's performance parameters such as air volume and air pressure can be flexibly adjusted to meet the use requirements under different working conditions; at the same time, the connections between the components are clear, easy to disassemble and repair, and reduce the difficulty and cost of maintenance.

[0028] A vortex portion 8 is provided on the volute 4, and the end of the vortex portion 8 and the connection portion with the volute 4 are smoothly curved. By providing the vortex portion 8, a flow channel is formed inside the volute 4, and the airflow accelerated by the impeller 3 is guided so that the airflow flows along a curved path in the vortex portion, and can transition to the blowout port more smoothly, thereby avoiding energy loss and noise increase caused by sudden changes in flow direction. The smoothly curved end and connection portions help to maintain the continuity and stability of the airflow, further improving the aerodynamic efficiency of the fan.

[0029] As a preferred embodiment of the above embodiment, the opening diameter of the vortex portion 8 gradually decreases toward the connection with the volute casing 4; through this design, the airflow can transition more smoothly when leaving the vortex portion 8 and entering the subsequent pipeline or space, reducing the resistance loss caused by the rapid expansion of the airflow, which is beneficial to improving the overall efficiency of the fan; effectively avoiding eddies and turbulence caused by the rapid decrease in airflow speed and the violent collision of the airflow with the edge of the outlet, thereby significantly reducing the noise level of the fan during operation and improving its applicability in noise-sensitive environments.

[0030] As a preferred embodiment of the above embodiment, the connection between the vortex portion 8 and the volute 4 forms a certain angle with the horizontal reference plane; the air inlet is matched with the airflow trajectory formed by the impeller 3, so as to better receive and guide the airflow accelerated by the impeller 3, reduce the airflow impact and energy loss, disperse and alleviate the impulse of the airflow generated by the rotation of the impeller 3, and reduce the vibration and noise caused by the imbalance of radial force; at the same time, the airflow is made to flow along an oblique path when leaving the vortex portion 8, avoiding direct vertical impact on the ground or other objects, and reducing the airflow rebound and the generation of vortices.

[0031] As a preferred embodiment of the above-mentioned embodiment, a plurality of protrusions 9 are provided on the vortex portion 8, and the protrusions 9 extend on the inner wall of the vortex portion 8 along the direction of the air flow; by providing the protrusions 9 to form guide grooves on the inner wall of the vortex portion 8, it is helpful to guide the airflow to flow smoothly along the inner wall of the vortex portion, reduce phenomena such as vortex and separation, enhance the stability of the airflow, and thus improve the overall efficiency of the fan; the protrusions 9 play a role in dividing and rectifying the airflow, which can reduce the turbulence intensity and airflow velocity fluctuations inside the vortex portion 8, thereby reducing the noise caused by turbulence and velocity fluctuations, dispersing the impact of the airflow on the inner wall, and further reducing the operating noise; the rigidity of the inner wall is increased by the protrusions 9, the ability to resist internal air pressure and mechanical stress is improved, and the durability and reliability of the blower are improved.

[0032] As a preferred embodiment of the above embodiment, a buffer surface 10 is provided on the volute 4; by providing the buffer surface 10, the airflow entering the volute 4 is preliminarily decelerated and dispersed, making the airflow smoother, absorbing and dispersing the kinetic energy of the inlet airflow, reducing the direct impact of the airflow on the inner wall of the volute and the wind wheel blades, avoiding eddies, turbulence and noise caused by sudden changes in air flow velocity, thereby improving the operating efficiency of the fan and reducing noise; the buffer surface 10 guides the airflow to be evenly distributed to different parts of the impeller 3, thereby improving the utilization rate of the working surface of the impeller 3.

[0033] As a preferred embodiment of the above embodiment, a filter 12 is provided on the volute 4, and the filter 12 is detachably installed; by setting the filter 12, impurities in the air entering the fan are intercepted to ensure the quality of air supply and protect the internal components of the fan from pollution and wear; the detachable installation allows for convenient and quick cleaning or replacement. When the filter accumulates too much dust or is severely blocked, there is no need to disassemble the entire fan. The filter can be simply removed for cleaning or replacement, which simplifies maintenance operations, reduces maintenance costs, and avoids the problem of fan performance degradation caused by long-term uncleaning; filters of different filtration grades can be selected for installation according to actual usage and air quality requirements to meet the specific requirements for air cleanliness in different occasions.

[0034] As a preferred embodiment of the above embodiment, an induction alarm is provided on the vortex casing 4, and the induction alarm is electrically connected to the driving mechanism 1; by setting the induction alarm, the operating status of the fan, such as temperature, vibration, current, pressure and other key parameters, is monitored in real time, abnormal conditions are discovered in time, and early warning guarantees are provided for the safe and stable operation of the equipment; when the induction alarm detects an abnormality in the fan, a signal can be immediately sent to the driving mechanism 1 through an electrical connection to stop the operation, thereby effectively preventing the fault from expanding and protecting the safety of equipment and personnel.

[0035] As a preferred embodiment of the above, a sound-absorbing material is provided in the volute 4; by arranging the sound-absorbing material to absorb and transform the sound wave energy generated during the operation of the fan, the noise generated by the air flow inside the volute, blade vibration and mechanical friction can be effectively reduced, making the blower quieter when working.

[0036] As a preferred embodiment of the above embodiment, it also includes a bracket 11, which is connected to the driving mechanism 1, the commutator 2 and the volute 4; by setting the bracket 11 to provide strong support and fixation for the driving mechanism 1, the commutator 2 and the volute 4, it is ensured that the entire blower remains stable during operation.

[0037] The utility model discloses a centrifugal blower, which, when working, supplies power to a driving mechanism 1, and a commutator 2 connected to the driving mechanism 1 drives an impeller 3 to rotate, so that air is sucked into the inner peripheral side of the impeller 3 from an inlet, and the air on the inner peripheral side of the impeller 3 is radially discharged to the outer peripheral side through wings 6, and the air is rectified toward the blowing outlet by utilizing the flow path of a volute 4 and blown out by a vortex portion 8.

[0038] The centrifugal blower of the utility model has common mechanical installation, connection or setting methods, and any method that can achieve beneficial effects can be implemented.

[0039] The above are only preferred implementations of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A centrifugal blower, characterized in that: include: A driving mechanism (1), wherein a commutator (2) is provided at an output end of the driving mechanism (1), an impeller (3) is provided at an output end of the commutator (2), and the driving mechanism (1) drives the commutator (2) and the impeller (3) to rotate; The impeller (3) comprises a main board (5), a plurality of wings (6) are arranged on the main board (5), the wings (6) are arranged and distributed on the edge of the main board (5) along the circumferential direction, the chord of the wings (6) forms a certain angle with the plane of the main board (5), and the main board (5) is provided with side plates (7) corresponding to the wings (6), and the side plates (7) are connected to the wings (6); A volute (4) is provided outside the impeller (3), and an air intake port and an air outlet are provided on the volute (4), constituting a flow path of an air flow generated by the rotation of the impeller (3).

2. The centrifugal blower according to claim 1, characterized in that: The volute (4) is provided with a vortex portion (8), and the end of the vortex portion (8) and the connection portion with the volute (4) are smoothly curved.

3. The centrifugal blower according to claim 2, characterized in that: The opening diameter of the swirl portion (8) gradually decreases towards the connection with the volute (4).

4. A centrifugal blower as claimed in claim 3, characterized in that: The connection between the swirl portion (8) and the volute (4) forms a certain angle with the horizontal reference plane.

5. The centrifugal blower according to claim 4, characterized in that: A plurality of protrusions (9) are provided on the vortex portion (8), and the protrusions (9) extend on the inner wall of the vortex portion (8) along the direction of the air flow.

6. The centrifugal blower according to claim 5, characterized in that: The scroll casing (4) is provided with a buffer curved surface (10).

7. The centrifugal blower according to claim 6, characterized in that: The volute (4) is provided with a filter screen (12), and the filter screen (12) is detachably installed.

8. The centrifugal blower according to claim 7, characterized in that: The volute (4) is provided with an induction alarm, and the induction alarm is electrically connected to the driving mechanism (1).

9. The centrifugal blower according to claim 8, characterized in that: Sound absorbing material is arranged in the volute (4).

10. The centrifugal blower according to claim 9, characterized in that: It also comprises a bracket (11), wherein the bracket (11) is connected to the driving mechanism (1), the commutator (2) and the volute (4).

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