Low-noise low-vibration two-stage ventilation equipment

Abstract

The utility model discloses low-noise low-vibration two-stage ventilation equipment which comprises an outer shell, a motor arranged in the outer shell, two-stage impellers driven by the motor and located in the outer shell, and a plurality of guide vanes located between the two-stage impellers, the guide vanes are fixedly arranged on a guide vane shell, the motor is fixedly installed in the guide vane shell, and the motor is fixedly installed in the guide vane shell. The outer ends of all the guide vanes are fixedly connected with a guide vane annular piece, and the guide vane annular piece surrounds all the guide vanes and is fixedly connected with the outer shell. The motor and the outer shell are fixedly connected through the guide vane annular piece, and the guide vane annular piece makes contact with the inner wall face of the outer shell, so that connection is more stable, and noise and vibration of the draught fan can be reduced easily.

Description

Technical Field

[0001] This utility model relates to ventilation equipment, specifically to axial flow fans. Background Technology

[0002] An axial flow fan is a type of fan in which gas flows parallel to the fan axis. It is typically used in applications requiring high flow rates but low pressure. An axial flow fan is stationary while moving air. It mainly consists of an impeller and a casing.

[0003] Traditional two-stage axial flow fans consist of a first-stage impeller and first-stage guide vanes, and a second-stage impeller and second-stage guide vanes connected in series. In use, they suffer from high aerodynamic noise, significant vibration, and low operating efficiency.

[0004] Patent application CN 119062594 A discloses a low-vibration, low-noise two-stage axial flow fan, comprising a primary impeller, a primary guide vane, and a secondary impeller. The primary and secondary impellers are symmetrically arranged on both sides of the primary guide vane. The primary guide vane is fixed inside a housing and has a drive motor installed inside. The motor shafts at both ends of the drive motor are connected to the primary and secondary impellers via shaft connecting devices. The airflow channels of the primary impeller, primary guide vane, and secondary impeller are interconnected. The drive motor drives the primary and secondary impellers to rotate, axially expelling the gas. Utility Model Content

[0005] The technical problem solved by this utility model is to improve the stability of a two-stage axial flow fan.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a low-noise and low-vibration two-stage ventilation device, including an outer housing, a motor installed in the outer housing, two-stage impellers driven by the motor and located in the outer housing, and a plurality of guide vanes located between the two-stage impellers. The guide vanes are fixedly installed on the guide vane housing, the motor is fixedly installed in the guide vane housing, and a guide vane annular member is fixedly connected to the outer end of all guide vanes. The guide vane annular member surrounds all guide vanes, and the guide vane annular member is concentric with the guide vane housing and fixedly connected to the outer housing.

[0007] According to the above technical solution, the motor is fixedly connected inside the guide vane housing, the guide vane annular component is fixedly connected to the guide vane housing through the guide vane, and the guide vane annular component is fixedly connected to the outer housing. In this way, the motor is fixedly connected to the outer housing.

[0008] The outer housing includes an inner component and two outer housing end components, which are fixedly connected to both ends of the inner component via flanges. The inner component and the two outer housing end components are assembled to form the outer housing, facilitating the installation and maintenance of the components inside the outer housing.

[0009] The inner diameter of the component inside the outer casing is smaller than the inner diameter of the component at the end of the outer casing, and the outer diameter of the guide vane annular component is equal to the inner diameter of the component inside the outer casing.

[0010] The guide vane annular component and the component in the outer housing are provided with corresponding first connection holes, and the guide vane annular component and the component in the outer housing are fixedly connected by a threaded connector in the first connection hole.

[0011] Alternatively, the guide vane annular component is welded to the guide vane, and the guide vane is welded to the guide vane shell.

[0012] The guide vane housing is provided with a second connection hole, which is used to fix the guide vane housing and the motor in a threaded connection.

[0013] The two ends of the motor shaft are respectively connected to the first-stage impeller and the second-stage impeller of the two-stage impeller, which are located in the corresponding external housing end components.

[0014] The outer casing end component is equipped with a filter screen plate, which can be fixedly connected to the outer casing end component through threaded connectors.

[0015] This utility model has the following technical effects:

[0016] First, compared to the radial connector connecting the motor and the outer housing, this utility model uses a guide vane annular component to achieve a fixed connection between the motor and the outer housing. Since the guide vane annular component is in contact with the inner wall of the outer housing, the connection is more stable, which helps to reduce the noise and vibration of the fan.

[0017] Secondly, compared to the radial connector connecting the motor and the outer housing, this invention uses guide vanes to achieve a fixed connection between the motor and the outer housing, eliminating the radial connector, avoiding the influence of the radial connector on the airflow, and the sound emitted by the airflow passing through the radial connector, which helps to reduce the noise and vibration of the fan. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings:

[0019] Figure 1 A schematic diagram of a low-noise, low-vibration two-stage ventilation system;

[0020] Figure 2 Exploded view of a low-noise, low-vibration two-stage ventilation system;

[0021] Figure 3 A schematic diagram of the components inside the outer casing of a low-noise, low-vibration two-stage ventilation system;

[0022] Figure 4 for Figure 3 The main view.

[0023] Explanation of symbols in the diagram:

[0024] 10. Motor; 11. Motor shaft;

[0025] 20. Guide vane; 21. Guide vane housing; 22. Guide vane annular component; 23. Second connecting hole;

[0026] 30. Components inside the outer casing; 31. End components of the outer casing; 32. Flange; 33. First connection hole; 34. Base; 35. Electrical control box;

[0027] 41. First-stage impeller; 42. Second-stage impeller;

[0028] 50. Filter screen. Detailed Implementation

[0029] Combination Figures 1 to 3 The low-noise, low-vibration two-stage ventilation equipment includes an outer casing, a motor 10 installed in the outer casing, two-stage impellers driven by the motor and located in the outer casing, and several guide vanes 20 located between the two-stage impellers. The guide vanes are fixedly installed on the guide vane housing 21, the motor is fixedly installed in the guide vane housing, and a guide vane annular member 22 is fixedly connected to the outer end of all guide vanes. The guide vane annular member surrounds all guide vanes and is concentric with the guide vane housing. The guide vane annular member is fixedly connected to the outer casing.

[0030] The outer housing includes an inner component 30 and two outer housing end components 31, which are fixedly connected to the two ends of the inner component via flanges 32.

[0031] The inner diameter of component 30 in the outer housing is smaller than the inner diameter of component 31 at the end of the outer housing, and the outer diameter of guide vane annular component 22 is equal to the inner diameter of component in the outer housing.

[0032] like Figure 3 The guide vane annular component 22 and the component 30 in the outer housing are provided with corresponding first connection holes 33, which are fixedly connected to the guide vane annular component and the component in the outer housing by a threaded connector in the first connection hole.

[0033] The guide vane annular component 22 is welded to the guide vane 20, and the guide vane is welded to the guide vane housing 21.

[0034] The guide vane housing 21 is provided with a second connection hole 23, which is used to fix the guide vane housing and the motor 10 together with the threaded connector in the second connection hole.

[0035] like Figure 2 , Figure 3 The two ends of the motor shaft 11 are respectively connected to the first-stage impeller 41 and the second-stage impeller 42 of the two-stage impeller, and the first-stage impeller and the second-stage impeller are respectively located in the corresponding outer casing end component 31.

[0036] like Figure 1 , Figure 2 The outer casing end component 31 is equipped with a filter screen 50.

[0037] The motor 10 is fixedly connected inside the guide vane housing 21. The guide vane annular component 22 is fixedly connected to the guide vane housing 21 through the guide vane 20. The guide vane annular component is fixedly connected to the component 30 in the outer housing. Thus, the motor 10 is fixedly connected to the outer housing.

[0038] The inner component 30 of the outer housing is assembled with the two outer housing end components 31 to form the outer housing, which facilitates the installation and maintenance of the components inside the outer housing.

[0039] like Figure 1 A base 34 is welded to the outer wall of component 30 in the outer casing for fixing and installing this ventilation equipment.

[0040] An electrical control box 35 is provided on the outer wall of component 30 in the outer housing, and the control switch inside the electrical control box is electrically connected to the motor 10.

[0041] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A low-noise, low-vibration two-stage ventilation device, comprising an outer casing, a motor (10) disposed within the outer casing, two-stage impellers driven by the motor and located within the outer casing, and a plurality of guide vanes (20) located between the two-stage impellers, the guide vanes being fixedly disposed on a guide vane housing (21), and the motor being fixedly installed within the guide vane housing, characterized in that: A guide vane annular member (22) is fixedly connected to the outer end of all guide vanes. The guide vane annular member surrounds all guide vanes and is concentric with the guide vane housing. The guide vane annular member is fixedly connected to the outer housing.

2. The low-noise, low-vibration two-stage ventilation equipment as described in claim 1, characterized in that: The outer housing includes an inner component (30) and two outer housing end components (31), which are fixedly connected to the two ends of the inner component via flanges (32).

3. The low-noise, low-vibration two-stage ventilation equipment as described in claim 2, characterized in that: The inner diameter of the component (30) in the outer housing is smaller than the inner diameter of the end component (31) in the outer housing, and the outer diameter of the guide vane annular component (22) is equal to the inner diameter of the component in the outer housing.

4. The low-noise, low-vibration two-stage ventilation equipment as described in claim 3, characterized in that: The guide vane annular component (22) and the component (30) in the outer housing are provided with corresponding first connection holes (33), and the guide vane annular component and the component in the outer housing are fixedly connected by a threaded connector in the first connection hole.

5. The low-noise, low-vibration two-stage ventilation equipment as described in claim 1, characterized in that: The guide vane annular part (22) is welded to the guide vane (20), and the guide vane is welded to the guide vane shell (21).

6. The low-noise, low-vibration two-stage ventilation equipment as described in claim 1, characterized in that: The guide vane housing (21) is provided with a second connection hole (23), which is used to fix the guide vane housing and the motor (10) together with the threaded connector in the second connection hole.

7. The low-noise, low-vibration two-stage ventilation equipment as described in claim 2, characterized in that: The two ends of the motor shaft (11) are respectively connected to the first-stage impeller (41) and the second-stage impeller (42) of the two-stage impeller, and the first-stage impeller and the second-stage impeller are respectively located in the corresponding external housing end component (31).

8. The low-noise, low-vibration two-stage ventilation equipment as described in claim 2, characterized in that: The outer housing end component (31) is equipped with a filter screen (50).

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