Improved centrifugal fan

Abstract

The utility model provides an improved centrifugal fan, including casing and the drive motor of being placed in the rear side of casing, the motor shaft outside fixed connection sleeve of drive motor, the connection sleeve is cylindrical structure, its outside clamps has the fan blade mounting seat, the fan blade mounting seat is circular ring structure, its side surface is uniformly distributed with a plurality of installation groove for installing the fan blade along the circumferential direction, the front and back two sides of installation groove with the front and back two side surfaces of fan blade mounting seat intercommunication, and its cross section is L, the lower extreme of fan blade is equipped with the plug -in block of adaptation with installation groove. The fan blade mounting seat and fan blade design of the application can replace the fan blade, after opening the air inlet screen cover of centrifugal fan, can replace some / a certain blade quickly, and can adjust the number and distribution of fan blade according to need, not only saves the maintenance cost, still has more extensive use scene.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal fan technology, and specifically to an improved centrifugal fan. Background Technology

[0002] Centrifugal fans, also known as radial fans, are fluid machines that rely on input mechanical energy to increase gas pressure and discharge gas. Over time, various problems can arise with the fan blades, causing the fan to become unable to operate smoothly or lack power.

[0003] Currently, existing patent CN108457910B discloses a centrifugal fan with easily replaceable blades, including a housing, an impeller disposed inside the housing, and a drive device for driving the impeller to rotate. The impeller includes a front impeller disc, a rear impeller disc disposed opposite to the front impeller disc, an inner shaft disc disposed on the side of the front impeller disc near the rear impeller disc, and blades evenly distributed between the front and rear impeller discs. The housing includes a first end face and a second end face. The first end face is provided with a top cover opening for removing the impeller radially and a top cover assembly for closing the top cover opening. The second end face is provided with a front end cover opening for removing the impeller axially and a front end cover assembly for closing the front end cover opening and opening axially along the impeller. This design enables rapid disassembly and replacement of the centrifugal fan.

[0004] However, the above method can only replace the entire impeller and cannot replace individual blades that need to be replaced, which increases maintenance and replacement costs to some extent. In addition, it cannot flexibly adjust the number of blades according to the actual needs of the scenario. Utility Model Content

[0005] To address the aforementioned problems, this utility model discloses an improved centrifugal fan.

[0006] The specific plan is as follows: An improved centrifugal fan includes a housing and a drive motor located at the rear of the housing. A connecting sleeve is fixed to the outside of the motor shaft of the drive motor. The connecting sleeve has a cylindrical structure, and a fan blade mounting seat is snapped onto its outer side. The fan blade mounting seat has an annular structure, and multiple mounting grooves for mounting fan blades are evenly distributed along the circumference on its side. The front and rear sides of the mounting grooves are connected to the front and rear sides of the fan blade mounting seat, and its cross-section is L-shaped. The lower end of the fan blade is provided with an insertion block that matches the mounting groove.

[0007] Furthermore, the outer side of the connecting sleeve is evenly distributed with strip-shaped teeth along the circumferential direction, and the strip-shaped teeth are arranged along its axial direction. The inner ring of the fan blade mounting base is evenly distributed with strip-shaped grooves of the same number and matching the strip-shaped teeth along the circumferential direction, and the strip-shaped grooves are arranged along its axial direction.

[0008] Furthermore, a positioning slot is also provided on one side of the upper section of the mounting groove.

[0009] Furthermore, the fan blade mounting base is provided with symmetrical positioning discs on both sides, and the center of the positioning discs is sleeved on the motor shaft and fixedly connected to the fan blade mounting base by bolts.

[0010] The beneficial effects of this utility model are as follows: It adopts a replaceable fan blade mounting base and fan blade design, which allows for quick replacement of one or more blades after opening the air inlet screen of the centrifugal fan. The number and distribution of fan blades can also be adjusted as needed, which not only saves maintenance costs but also has a wider range of application scenarios. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the present invention.

[0012] Figure 2 This is a schematic diagram of the fan blade mounting base.

[0013] Figure 3 This is a schematic diagram of the connecting sleeve.

[0014] List of reference numerals in the attached diagram: 1-Housing, 2-Motor shaft, 3-Connecting sleeve, 4-Fan blade mounting base, 5-Fan blade, 6-Mounting groove, 7-Positioning slot. Detailed Implementation

[0015] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0016] As shown in the figure, this application discloses an improved centrifugal fan, including a housing 1 and a drive motor located at the rear of the housing. The motor shaft 2 of the drive motor is externally fixed with a connecting sleeve 3. The connecting sleeve 3 is a cylindrical structure, and a fan blade mounting seat 4 is snapped onto its outer side. The fan blade mounting seat 4 is an annular structure, and multiple mounting grooves for mounting fan blades 5 are evenly distributed along the circumferential direction on its side. The front and rear sides of the mounting groove 6 are connected to the front and rear sides of the fan blade mounting seat 4, and its cross-section is L-shaped. The lower end of the fan blade 5 is provided with an insert block that matches the mounting groove 6.

[0017] In this embodiment, the outer side of the connecting sleeve 3 is evenly distributed with strip-shaped teeth along the circumferential direction, and the strip-shaped teeth are arranged along its axial direction. The inner ring of the fan blade mounting base 4 is evenly distributed with strip-shaped grooves of the same number and matching the number of strip-shaped teeth along the circumferential direction, and the strip-shaped grooves are arranged along its axial direction. This ensures the connection stability between the fan blade mounting base and the connecting sleeve, and allows for the replacement of fan blade mounting bases with different numbers of mounting grooves as needed.

[0018] In this embodiment, a positioning slot 7 is also provided on one side of the upper section of the mounting slot 6. This can further improve the stability of the lower end insert block of the fan blade and the mounting slot. When a positioning slot is provided, a corresponding locking block is also provided on the insert block.

[0019] In this embodiment, symmetrical positioning discs are provided on both sides of the fan blade mounting base 4. The center of the positioning disc is sleeved on the motor shaft 2 and fixedly connected to the fan blade mounting base 4 by bolts. The positioning discs on both sides can effectively limit the position of the fan blades on the front and rear sides, ensuring the stability during operation.

[0020] When it is necessary to replace some of the fan blades, simply stop the machine, open the air inlet screen of the centrifugal fan, and after removing the positioning disc, one or more blades can be quickly replaced. In addition, the number and distribution of the fan blades can be adjusted as needed.

[0021] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. An improved centrifugal fan characterized by, The device includes a housing (1) and a drive motor located on the rear side of the housing. The motor shaft (2) of the drive motor is fixed with a connecting sleeve (3). The connecting sleeve (3) is a cylindrical structure, and a fan blade mounting seat (4) is snapped onto its outer side. The fan blade mounting seat (4) is an annular structure, and multiple mounting slots for mounting fan blades (5) are evenly distributed along the circumference on its side. The front and rear sides of the mounting slot (6) are connected to the front and rear sides of the fan blade mounting seat (4), and its cross-section is L-shaped. The lower end of the fan blade (5) is provided with an insert that matches the mounting slot (6).

2. The improved centrifugal fan as claimed in claim 1, wherein The outer side of the connecting sleeve (3) is evenly distributed with strip-shaped teeth along the circumferential direction, and the strip-shaped teeth are arranged along its axial direction. The inner ring of the fan blade mounting base (4) is evenly distributed with strip-shaped grooves that are the same number as and match the strip-shaped teeth along the circumferential direction, and the strip-shaped grooves are arranged along its axial direction.

3. The improved centrifugal fan as claimed in claim 1, wherein The upper side of the mounting groove (6) is also provided with a positioning slot (7).

4. The improved centrifugal fan as claimed in claim 1, wherein The fan blade mounting base (4) has symmetrical positioning discs on both sides. The middle part of the positioning disc is sleeved on the motor shaft (2) and fixedly connected to the fan blade mounting base (4) by bolts.

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