High-pressure axial flow centrifugal fan

Abstract

The utility model discloses a high-pressure axial flow centrifugal fan which comprises a high-pressure axial flow centrifugal fan body, an air inlet and an air outlet are formed in one side and the upper portion of the high-pressure axial flow centrifugal fan body respectively, the air inlet is formed in a right side thickened convex face, and the right side thickened convex face is arranged on one side of the high-pressure axial flow centrifugal fan body. A mounting bottom plate is arranged at the bottom of the high-pressure axial flow centrifugal fan body, and a left thickened convex face is arranged on the other side of the high-pressure axial flow centrifugal fan body. The outer anti-explosion protection cover and the inner anti-explosion protection cover are arranged to be of the integrated structure, the assembly firmness of the two structures can be guaranteed, the outer anti-explosion protection cover can play an anti-explosion protection role on the motor, and the inner anti-explosion protection cover can play an anti-explosion protection role on the impeller. Therefore, better anti-explosion protection is carried out on the inside and outside of the shell, and the use safety of the high-pressure axial flow centrifugal fan is improved.

Description

Technical Field

[0001] The utility model relates to the field of centrifugal fans, in particular to a high-pressure axial flow centrifugal fan. Background Art

[0002] A centrifugal fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine. Centrifugal fans are widely used in ventilation, dust removal and cooling in factories, mines, tunnels, cooling towers, vehicles, ships and buildings. Centrifugal fans are based on the principle of converting kinetic energy into potential energy. They use a high-speed rotating impeller to accelerate the gas, then slow it down and change the flow direction, so that the kinetic energy is converted into potential energy.

[0003] There are still certain deficiencies in the use of high-pressure axial-flow centrifugal fans in the prior art. During long-term operation, sparks will appear due to friction between the impeller and the casing of the traditional high-pressure axial-flow centrifugal fan, causing the internal temperature to be too high, resulting in the risk of explosion, and posing certain safety hazards. Utility Model Content

[0004] The utility model aims to provide a high-pressure axial flow centrifugal fan to solve the problem that in the traditional high-pressure axial flow centrifugal fan proposed in the above background technology, sparks will appear due to friction between the impeller and the casing during long-term operation, resulting in excessive internal temperature and the risk of explosion, which poses certain safety hazards.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-pressure axial flow centrifugal fan, comprising a high-pressure axial flow centrifugal fan body, an air inlet and an air outlet are respectively arranged on one side and the top of the high-pressure axial flow centrifugal fan body, the air inlet is arranged on the right side thickened convex surface, the right side thickened convex surface is arranged on one side of the high-pressure axial flow centrifugal fan body, a mounting base plate is arranged on the bottom of the high-pressure axial flow centrifugal fan body, a left side thickened convex surface is arranged on the other side of the high-pressure axial flow centrifugal fan body, a sealing cover is arranged on the outside of the left side thickened convex surface, a motor is arranged on the outside of the sealing cover, one end of the motor is connected to the motor shaft, an impeller is arranged on the motor shaft, an external explosion-proof protective cover is arranged on the outside of the motor, and the inner end of the external explosion-proof protective cover is connected to the internal explosion-proof protective cover.

[0006] In a further embodiment, the outer explosion-proof protective cover and the inner explosion-proof protective cover are configured as an integral structure, and the outer explosion-proof protective cover and the sealing cover are plug-connected via an insertion port.

[0007] In a further embodiment, a support plate is provided on the inner side of the sealing cover, a U-shaped bayonet is provided on the edge of the support plate, and the outer explosion-proof protective cover is connected to the U-shaped bayonet by inlaying.

[0008] In a further embodiment, a reinforcing cross bar is provided at the outer ring position inside the outer explosion-proof protective cover, a fixing ring is provided at the center position of the outer end of the outer explosion-proof protective cover, and the fixing ring is connected to the outer explosion-proof protective cover by welding.

[0009] In a further embodiment, the sealing cover is fixedly connected to the high-pressure axial-flow centrifugal fan body by means of hexagon socket fixing bolts, and the outer shape of the sealing cover is set to a circular structure.

[0010] In a further embodiment, a locking screw hole is provided at the bottom end of the inner explosion-proof protective cover, and the inner explosion-proof protective cover and the right thickened convex surface are fixedly connected through a long locking bolt and the locking screw hole.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. In the utility model, the outer explosion-proof protective cover and the inner explosion-proof protective cover are set as an integrated structure. By setting it as an integrated structure, the firmness of the assembly of the two structures can be ensured. The outer explosion-proof protective cover can provide explosion-proof protection for the motor, and the inner explosion-proof protective cover can provide explosion-proof protection for the impeller, thereby providing better explosion-proof protection for the inside and outside of the shell, improving the safety of the use of the high-pressure axial flow centrifugal fan, and the explosion-proof structure is simple and easier to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of a high-pressure axial flow centrifugal fan of the utility model;

[0014] Figure 2 It is a front view of the impeller of the utility model;

[0015] Figure 3 It is a side view of a high-pressure axial flow centrifugal fan of the utility model;

[0016] Figure 4 This is a schematic diagram of the disassembled structure of a high-pressure axial flow centrifugal fan of the utility model;

[0017] Figure 5 It is a structural schematic diagram of the support plate of the utility model.

[0018] In the figure: 1. High-pressure axial-flow centrifugal fan body; 2. Thickened convex surface on the right; 3. Locking screw hole; 4. Air outlet; 5. Mounting base plate; 6. Support plate; 7. Impeller; 8. External explosion-proof protective cover; 9. Sealing cover; 10. Hexagon socket fixing bolt; 11. Motor; 12. Reinforcement cross bar; 13. Thickened convex surface on the left; 14. Long locking bolt; 15. Air inlet; 16. Fixing ring; 17. Insertion port; 18. U-shaped bayonet; 19. Internal explosion-proof protective cover; 20. Motor shaft. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] See also Figure 1-5 The utility model provides an embodiment: a high-pressure axial flow centrifugal fan, including a high-pressure axial flow centrifugal fan body 1, an air inlet 15 and an air outlet 4 are respectively arranged on one side and the top of the high-pressure axial flow centrifugal fan body 1, the air inlet 15 is arranged on the right thickened convex surface 2, the right thickened convex surface 2 is arranged on one side of the high-pressure axial flow centrifugal fan body 1, a mounting base plate 5 is arranged at the bottom of the high-pressure axial flow centrifugal fan body 1, a left thickened convex surface 13 is arranged on the other side of the high-pressure axial flow centrifugal fan body 1, a sealing cover 9 is arranged on the outer side of the left thickened convex surface 13, a motor 11 is arranged on the outer side of the sealing cover 9, and one end of the motor 11 is connected to the motor shaft 20 An impeller 7 is provided on the motor shaft 20, an outer explosion-proof protective cover 8 is provided on the outside of the motor 11, and the inner end of the outer explosion-proof protective cover 8 is connected to the inner explosion-proof protective cover 19; the right thickened convex surface 2 and the left thickened convex surface 13 are used to increase the thickness of both sides of the high-pressure axial flow centrifugal fan body 1, and the installation bottom plate 5 is used to increase the stability of the installation of the high-pressure axial flow centrifugal fan body 1, and the sealing cover 9 is used to open or close one side of the high-pressure axial flow centrifugal fan body 1, and the impeller 7 is installed and fixed, the outer explosion-proof protective cover 8 is used to perform explosion-proof protection on the motor 11, and the inner explosion-proof protective cover 19 is used to perform explosion-proof protection on the impeller 7.

[0021] The outer explosion-proof protective cover 8 and the inner explosion-proof protective cover 19 are set as an integral structure, and the outer explosion-proof protective cover 8 and the sealing cover 9 are plug-connected through the plug-in port 17, and the plug-in connection facilitates the assembly of the outer explosion-proof protective cover 8 and the sealing cover 9; the inner side of the sealing cover 9 is provided with a support plate 6, and the edge position of the support plate 6 is provided with a U-shaped bayonet 18, and the outer explosion-proof protective cover 8 and the U-shaped bayonet 18 are connected by inlaying, and the support plate 6 is used to increase the support of the connection position between the outer explosion-proof protective cover 8 and the sealing cover 9, so that the installation is more secure The sealing cover 9 is fixedly connected to the high-pressure axial-flow centrifugal fan body 1 by means of an inner hexagonal fixing bolt 10, and the outer shape of the sealing cover 9 is set to a circular structure, and the inner hexagonal fixing bolt 10 is used to fix the installation position of the sealing cover 9; a reinforcing cross bar 12 is provided at the outer ring position of the outer explosion-proof protective cover 8, and a fixing ring 16 is provided at the center position of the outer end of the outer explosion-proof protective cover 8, and the fixing ring 16 is connected to the outer explosion-proof protective cover 8 by welding, and the reinforcing cross bar 12 is used to increase the explosion-proof strength of the outer explosion-proof protective cover 8.

[0022] A locking screw hole 3 is provided at the bottom end of the inner explosion-proof protective cover 19, and the inner explosion-proof protective cover 19 and the right thickened convex surface 2 are fixedly connected through a long locking bolt 14 and the locking screw hole 3. The locking screw hole 3 is used to install the long locking bolt 14, and the long locking bolt 14 is used to fix the inner explosion-proof protective cover 19 to the right thickened convex surface 2.

[0023] Working principle: When in use, the outer explosion-proof protective cover 8 and the inner explosion-proof protective cover 19 are inserted and installed in the sealing cover 9, so that the outer explosion-proof protective cover 8 is embedded and fixed with the U-shaped bayonet 18, and then the impeller 7 is clamped on the motor shaft 20, and the sealing cover 9 is installed on the outside of the left thickened convex surface 13, so that the impeller 7 is installed inside the high-pressure axial flow centrifugal fan body 1, and the installation position of the inner explosion-proof protective cover 19 is locked and fixed by connecting the long locking bolt 14 with the locking screw hole 3, and the sealing cover 9 is fixed by the hexagonal fixing bolt 10, and the electric motor 11 converts electrical energy into mechanical energy to drive the impeller 7 to rotate at a uniform speed, and the gas is sucked in through the air inlet 15 and discharged through the air outlet 4.

[0024] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A high-pressure axial flow centrifugal fan, comprising a high-pressure axial flow centrifugal fan body (1), characterized in that: An air inlet (15) and an air outlet (4) are respectively provided on one side and the top of the high-pressure axial flow centrifugal fan body (1); the air inlet (15) is provided on the right thickened convex surface (2); the right thickened convex surface (2) is provided on one side of the high-pressure axial flow centrifugal fan body (1); a mounting base plate (5) is provided at the bottom of the high-pressure axial flow centrifugal fan body (1); a left thickened convex surface (13) is provided on the other side of the high-pressure axial flow centrifugal fan body (1); a sealing cover (9) is provided on the outer side of the left thickened convex surface (13); a motor (11) is provided on the outer side of the sealing cover (9); one end of the motor (11) is connected to a motor shaft (20); an impeller (7) is provided on the motor shaft (20); an external explosion-proof protective cover (8) is provided on the outside of the motor (11); the inner end of the external explosion-proof protective cover (8) is connected to an internal explosion-proof protective cover (19).

2. A high pressure axial flow centrifugal fan according to claim 1, characterized in that: The outer explosion-proof protective cover (8) and the inner explosion-proof protective cover (19) are arranged as an integral structure, and the outer explosion-proof protective cover (8) and the sealing cover (9) are connected by plugging through the plug-in opening (17).

3. A high pressure axial flow centrifugal fan according to claim 1, characterized in that: A support plate (6) is provided on the inner side of the sealing cover (9), a U-shaped bayonet (18) is provided at the edge of the support plate (6), and the outer explosion-proof protective cover (8) is connected to the U-shaped bayonet (18) by embedding.

4. A high pressure axial flow centrifugal fan according to claim 1, characterized in that: A reinforcing cross bar (12) is provided at the outer ring position inside the outer explosion-proof protective cover (8), a fixing ring (16) is provided at the center position of the outer end of the outer explosion-proof protective cover (8), and the fixing ring (16) is connected to the outer explosion-proof protective cover (8) by welding.

5. A high pressure axial flow centrifugal fan according to claim 1, characterized in that: The sealing cover (9) is fixedly connected to the high-pressure axial-flow centrifugal fan body (1) via hexagon socket fixing bolts (10), and the outer shape of the sealing cover (9) is set to be a circular structure.

6. A high pressure axial flow centrifugal fan according to claim 1, characterized in that: A locking screw hole (3) is provided at the bottom end of the inner explosion-proof protective cover (19), and the inner explosion-proof protective cover (19) and the right thickened convex surface (2) are fixedly connected through a long locking bolt (14) and the locking screw hole (3).

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