Double-layer wind locking large fan

Abstract

The application discloses a double-layer wind-locking large fan, and aims at solving the problem that when the welding quality cannot reach the technical requirement or the flange plate and the air inlet I or the annular bottom plate and the left side plate are not connected tightly, external airflow is easily led into the fan, thereby affecting the air pressure of the fan. The left side plate (4) outwardly connected with the sealing plate (8) on the surface of the support frame (9) is adopted, and the sealing plate (8), the support frame (9) bottom plate and the left side plate (4) are sleeved on the air inlet II (7) of the impeller (3).

Description

Technical Field

[0001] This invention relates to a fan, and more particularly to a large double-layer airlock fan consisting of a volute, a left side plate, a right side plate, an air inlet I, and an impeller. Background Technology

[0002] Currently, a large fan has been publicly disclosed on the market. Its structure consists of a volute, a left side plate, a right side plate, an air inlet I, and an impeller. The left and right side plates are respectively located on both sides of the volute. The impeller is installed inside the volute between the left and right side plates. A reinforcing plate is also installed between the impeller and the left side plate. The trumpet-shaped air inlet I is mounted on the left side plate via a support frame, with the smaller end of the trumpet-shaped air inlet I placed inside the impeller air inlet II. The support frame consists of a cylinder, an annular base plate, and a flange. The flange is connected to the annular base plate via the cylinder. The plates are connected, and the cylinder and the annular base plate are connected to form an axial cross-section in the shape of a T. Therefore, the support frame, the air inlet I and the impeller air inlet II form a sealed cavity. However, for ease of assembly, the aperture of the impeller air inlet II on the left side plate and the annular base plate is relatively large, so the so-called sealed cavity is not sealed. Furthermore, since the cylinder and the annular base plate are connected by electric welding, when the welding quality does not meet the technical requirements or the flange and the air inlet I or the annular base plate and the left side plate are not tightly connected, external airflow can easily enter the fan, thereby affecting the fan's air pressure. Summary of the Invention

[0003] The purpose of this invention is to provide a large double-layer airlock fan with a simple structure that prevents external airflow from entering the fan and ensures the fan's air pressure.

[0004] To achieve the above objectives, the present invention provides a large double-layer airlock fan, comprising a volute, a left side plate, a right side plate, an air inlet I, and an impeller. The left side plate and the right side plate are respectively provided on both sides of the volute. The impeller is installed in the volute between the left side plate and the right side plate. A reinforcing plate is also provided between the impeller and the left side plate. The trumpet-shaped air inlet I is set on the left side plate by a support frame, with the small end of the trumpet-shaped air inlet I placed inside the impeller air inlet II. A sealing plate is connected to the outward-facing surface of the left side plate inside the support frame, and the sealing plate, the support frame base plate, and the left side plate are fitted onto the impeller air inlet II.

[0005] The sealing plate is set in a circular shape, and multiple U-shaped grooves are evenly distributed around the periphery of the circular sealing plate to adjust the gap between the inner hole of the sealing plate and the air inlet II of the impeller.

[0006] The plurality of the U-shaped grooves are arranged radially along the sealing plate.

[0007] Multiple screw holes corresponding to the U-shaped grooves of the sealing plate are evenly distributed on the left side plate.

[0008] The screw hole is a blind hole.

[0009] The sealing plate is slidably connected to the impeller air inlet II.

[0010] With this structure, a sealing plate is connected to the outward-facing surface of the left side plate within the support frame, and the sealing plate, the support frame base plate, and the left side plate are fitted onto the impeller's air inlet II. This achieves a simple structure, prevents external airflow from entering the fan, and ensures the fan's air pressure. Attached Figure Description

[0011] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0012] Appendix Figure 1 This is a schematic cross-sectional view of a large double-layer airlock fan according to the present invention.

[0013] Appendix Figure 2 It is attached Figure 1 A partially enlarged cross-sectional view.

[0014] Appendix Figure 3 This is a front view schematic diagram of a double-layer airlock large fan sealing plate according to the present invention.

[0015] In the diagram: 1. Volute 2. Right side plate 3. Impeller 4. Left side plate 5. Reinforcing plate 6. Air inlet I 7. Air inlet II 8. Sealing plate 9. Support frame 10. U-shaped channel. Detailed Implementation

[0016] Appendix Figure 1 Appendix Figure 2 The present invention discloses a large double-layer airlock fan, comprising a volute 1, a left side plate 4, a right side plate 2, an air inlet I6, and an impeller 3. The left side plate 4 and the right side plate 2 are respectively provided on both sides of the volute 1. The impeller 3 is installed in the volute 1 between the left side plate 4 and the right side plate 2. A reinforcing plate 5 is also provided between the impeller 3 and the left side plate 4. The trumpet-shaped air inlet I6 is provided on the left side plate 4 through a support frame 9, with the small end of the trumpet-shaped air inlet I6 placed in the air inlet II7 of the impeller 3. A sealing plate 8 is connected to the outward-facing surface of the left side plate 4 in the support frame 9, and the sealing plate 8, the bottom plate of the support frame 9, and the left side plate 4 are fitted onto the air inlet II7 of the impeller 3.

[0017] Appendix Figure 3 As shown, the sealing plate 8 is arranged in a circular shape, and multiple U-shaped grooves 10 are evenly distributed around the periphery of the circular sealing plate 8 to adjust the gap between the inner hole of the sealing plate 8 and the air inlet II 7 of the impeller 3; the multiple U-shaped grooves 10 are arranged radially along the radial direction of the sealing plate 8.

[0018] Appendix Figure 1 Appendix Figure 2As shown, multiple screw holes corresponding to the U-shaped groove 10 of the sealing plate 8 are evenly distributed on the left side plate 4; the screw holes are blind holes; the sealing plate 8 is slidably connected to the air inlet II 7 of the impeller 3. The sealing plate 8 is made of aluminum plate.

Claims

1. A large double-layer airlock fan, comprising a volute, a left side plate, a right side plate, an air inlet I, and an impeller, wherein the left side plate and the right side plate are respectively provided on both sides of the volute, the impeller is installed in the volute between the left side plate and the right side plate, a reinforcing plate is also provided between the impeller and the left side plate, and the trumpet-shaped air inlet I is mounted on the left side plate by a support frame, with the small end of the trumpet-shaped air inlet I placed inside the impeller air inlet II, characterized in that: A sealing plate (8) is connected to the outward-facing surface of the left side plate (4) inside the support frame (9), and the sealing plate (8), the bottom plate of the support frame (9) and the left side plate (4) are fitted onto the air inlet II (7) of the impeller (3).

2. A large double-layer airlock fan according to claim 1, characterized in that: The sealing plate (8) is set in a circular shape, and multiple U-shaped grooves (10) are evenly distributed around the circular sealing plate (8) to adjust the gap between the inner hole of the sealing plate (8) and the air inlet II (7) of the impeller (3).

3. A large double-layer airlock fan according to claim 2, characterized in that: Multiple U-shaped grooves (10) are arranged radially along the sealing plate (8) and are arranged in a radial pattern.

4. A large double-layer airlock fan according to claim 1, characterized in that: Multiple screw holes corresponding to the U-shaped groove (10) of the sealing plate (8) are evenly distributed on the left side plate (4).

5. A large double-layer airlock fan according to claim 5, characterized in that: The screw hole is a blind hole.

6. A large double-layer airlock fan according to claim 1, characterized in that: The sealing plate (8) is slidably connected to the air inlet II (7) of the impeller (3).

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