Industrial centrifugal fan with noise reduction structure

Abstract

The utility model relates to the technical field of fans, and discloses an industrial centrifugal fan with a noise reduction structure, which comprises a base, a motor is fixedly mounted on one side of the top of the base, a shell is fixedly mounted on the other side of the top of the base, and an impeller is arranged in the shell. The impeller is connected with an output shaft of the motor through a coupler. According to the industrial centrifugal fan with the noise reduction structure, the impeller is the backward-tilting type centrifugal impeller, the backward-tilting type centrifugal impeller is small in friction and very low in generated noise during operation, the shell and the impeller are made of steel plates, the surfaces of the shell and the impeller are coated with the anti-oxidation coatings, the overall oxidation resistance is improved, the structure is firm and durable, and the rotary knob is rotated. The rotary knob drives the baffle to rotate through the damping rotating shaft, so that the opening size of the air inlet is controlled, the air inlet amount is controlled, the front side and the rear side of the dustproof cover are of hollowed-out grid structures, certain dustproof protection can be conducted on the coupler, and the service life is prolonged.

Description

Technical Field

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

[0002] Fan is the customary abbreviation for gas compression and gas transportation machinery in China. The fans usually mentioned include ventilators and blowers. The main structural components of the fan are impeller, casing, air inlet, bracket, motor, pulley, coupling, muffler, transmission parts (bearings), etc.

[0003] Existing fans use angle steel brackets, which are costly and wasteful to manufacture. In addition, the control of the fan's air intake is cumbersome, and the air intake is poorly matched with the user's pipe network system. Utility Model Content

[0004] 1. Technical issues to be resolved

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

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an industrial centrifugal fan with a noise reduction structure, comprising a base, a motor fixedly mounted on one side of the top of the base, a shell fixedly mounted on the other side of the top of the base, an impeller arranged inside the shell, the impeller and the output shaft of the motor are connected to each other through a coupling, an air inlet is opened at the top of the outer side of the shell, a baffle is arranged on the inner side of the air inlet, a dust cover fixedly mounted on the top of the base, the dust cover covers the outside of the coupling, and gaskets are fixedly mounted at the four corners of the bottom of the base.

[0008] Preferably, the impeller is a backward inclined centrifugal impeller.

[0009] Preferably, the casing and the impeller are made of steel plates, and an anti-oxidation coating is sprayed on the surface.

[0010] Preferably, the baffle plate matches the air inlet, and a knob is installed on the side of the baffle plate through a damping shaft, and the knob is located outside the housing.

[0011] Preferably, the front and rear sides of the dust cover are hollow grid structures.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The industrial centrifugal fan with a noise reduction structure has a backward-inclined impeller. The backward-inclined impeller has low friction during operation and generates very low noise. The casing and impeller are made of steel plates. The casing is welded and assembled with channel steel and steel plates. It has low manufacturing difficulty and low cost. The surface is sprayed with an anti-oxidation coating to improve the overall oxidation resistance. The structure is sturdy and durable. When the knob is turned, the knob drives the baffle to rotate through the damping shaft, thereby controlling the opening size of the air inlet and the air intake volume. The front and rear sides of the dust cover are hollow grid structures, which can provide certain dust protection for the coupling and extend its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the top view structure of the utility model;

[0016] Figure 3 This is a side view of the structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the coupling of the utility model;

[0018] Figure 5 It is a schematic diagram of the structure of the dust cover of the utility model.

[0019] In the figure: 1. base; 2. motor; 3. coupling; 4. impeller; 5. casing; 6. air inlet; 7. baffle; 8. dust cover; 9. gasket; 10. knob. DETAILED DESCRIPTION

[0020] 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.

[0021] See also Figure 1-5The utility model provides a technical solution: an industrial centrifugal fan with a noise reduction structure, comprising a base 1, a motor 2, a coupling 3, an impeller 4, a casing 5, an air inlet 6, a baffle 7, a dust cover 8, a gasket 9, and a knob 10. The motor 2 is fixedly mounted on one side of the top of the base 1, and the casing 5 is fixedly mounted on the other side of the top of the base 1. The impeller 4 is arranged inside the casing 5, and the impeller 4 and the output shaft of the motor 2 are connected to each other through the coupling 3. The top of the outer side of the casing 5 is provided with an air inlet 6, and the inner side of the air inlet 6 is provided with a baffle 7. The top of the base 1 is fixedly mounted with a dust cover 8, and the dust cover 8 covers the outside of the coupling 3. Gaskets 9 are fixedly mounted at the four corners of the bottom of the base 1.

[0022] Furthermore, the impeller 4 is a backward-inclined centrifugal impeller, which has the advantage that the backward-inclined centrifugal impeller has low friction and generates very low noise during operation.

[0023] Furthermore, the casing 5 and the impeller 4 are made of steel plates, and an anti-oxidation coating is sprayed on the surface. The advantage is that the overall oxidation resistance is improved and the structure is strong and durable.

[0024] Furthermore, the baffle 7 is matched with the air inlet 6, and a knob 10 is installed on the side of the baffle 7 through a damping shaft. The knob 10 is located outside the shell 5. The advantage is that by rotating the knob 10, the knob 10 drives the baffle 7 to rotate through the damping shaft, thereby controlling the opening size of the air inlet 6 and controlling the air intake volume.

[0025] Furthermore, the front and rear sides of the dust cover 8 are hollow grid structures, which has the advantage of being able to provide a certain degree of dust protection for the coupling 3 and extend its service life.

[0026] Working principle: First, start the motor 2, and the motor 2 drives the impeller 4 to rotate through the connecting shaft 3. Among them, the impeller 4 is a backward-inclined centrifugal impeller. The backward-inclined centrifugal impeller has low friction during operation and generates very low noise. The casing 5 and the impeller 4 are made of steel plates, and the surface is sprayed with an anti-oxidation coating to improve the overall oxidation resistance. The structure is sturdy and durable. Rotate the knob 10, and the knob 10 drives the baffle 7 to rotate through the damping shaft, thereby controlling the opening size of the air inlet 6 and controlling the air intake volume. The front and rear sides of the dust cover 8 are hollow grid structures, which can provide certain dust protection for the coupling 3 and extend its service life.

[0027] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. An industrial centrifugal fan with a noise reduction structure, comprising a base (1), characterized in that: A motor (2) is fixedly mounted on one side of the top of the base (1), a housing (5) is fixedly mounted on the other side of the top of the base (1), an impeller (4) is arranged inside the housing (5), the impeller (4) and the output shaft of the motor (2) are connected to each other via a coupling (3), an air inlet (6) is opened at the top of the outer side of the housing (5), a baffle (7) is arranged on the inner side of the air inlet (6), a dust cover (8) is fixedly mounted on the top of the base (1), the dust cover (8) covers the outside of the coupling (3), and gaskets (9) are fixedly mounted at the four corners of the bottom of the base (1).

2. The industrial centrifugal fan with a noise reduction structure according to claim 1, characterized in that: The impeller (4) is a backward-inclined centrifugal impeller.

3. The industrial centrifugal fan with a noise reduction structure according to claim 1, characterized in that: The housing (5) and the impeller (4) are made of steel plates, and an anti-oxidation coating is sprayed on the surface.

4. The industrial centrifugal fan with a noise reduction structure according to claim 1, characterized in that: The baffle plate (7) matches the air inlet (6), and a knob (10) is installed on the side of the baffle plate (7) via a damping shaft, and the knob (10) is located outside the housing (5).

5. The industrial centrifugal fan with a noise reduction structure according to claim 1, characterized in that: The front and rear sides of the dust cover (8) are hollow grid structures.

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