Coating oven fan

Abstract

The utility model discloses a fan of a coating oven. The fan comprises a main supporting base; the volute is connected with the supporting base, one side of the volute is provided with a first through hole, and the other side of the volute and the first through hole are coaxially provided with an air guide piece used for air inlet; the coaxial mounting piece is arranged on the side, provided with the first through hole, of the volute; a connecting hole coaxial with the first through hole is formed in the coaxial mounting piece, and the diameter of the first through hole is larger than that of the connecting hole; the driving motor is connected with the supporting base and located on the side, away from the air guiding piece, of the volute. An output shaft of the driving motor is rotatably arranged in the connecting hole in a penetrating mode, and the diameter of the output shaft of the driving motor is matched with the diameter of the connecting hole. And the impeller assembly is in driving connection with an output shaft of the driving motor and is suitable for being driven by the driving motor to rotate and pressurize in the volute. The technical problems that in an existing coating oven fan, deviation is prone to occurring between an output shaft of a driving motor and the axial direction of a volute, an impeller is prone to making contact with an air guiding piece, friction damage is caused, and the service life is affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of coating equipment, in particular to a coating oven fan. Background Art

[0002] As a coating oven fan, the working principle is that the fan converts kinetic energy into potential energy and then uses the high-speed rotating impeller to accelerate the gas, then decelerate and change the flow direction, so that the kinetic energy is converted into potential energy (pressure). In a single-stage centrifugal fan, the gas enters the impeller from the axial direction, changes to the radial direction when passing through the impeller, and then enters the diffuser. In the diffuser, the gas changes the flow direction and causes deceleration. This deceleration effect converts kinetic energy into pressure energy. The pressure increase mainly occurs in the impeller, and secondly in the expansion process. In a multi-stage centrifugal fan, a reflow device is used to allow the airflow to enter the next impeller to generate higher pressure.

[0003] An existing coating oven fan usually includes a volute, an impeller and a motor. The impeller is arranged in the volute. A first through hole is arranged on the back of the volute. An air guide is arranged coaxially with the front of the volute. The output shaft of the motor passes through the first through hole and is driven and connected to the impeller. The diameter of the first through hole arranged on the volute is larger than the diameter of the output shaft of the motor. Therefore, when installing the drive motor or during use, the output shaft of the drive motor is prone to deviation from the axial direction of the volute, and the impeller is prone to contact with the air guide, resulting in friction damage and affecting the service life. Utility Model Content

[0004] The utility model provides a coating oven fan, which solves the technical problems in the existing coating oven fan that the output shaft of the driving motor and the axial direction of the volute are prone to deviation, the impeller is prone to contact with the air guide member, resulting in friction damage and affecting the service life.

[0005] In view of this, the utility model provides a coating oven fan, comprising:

[0006] Main support base;

[0007] A volute connected to the support base, wherein a first through hole is provided on one side of the volute, and an air guide for air intake is provided coaxially with the first through hole on the other side;

[0008] A coaxial mounting member is arranged on a side of the volute provided with the first through hole; the coaxial mounting member is provided with a connecting hole coaxial with the first through hole, and the diameter of the first through hole is larger than the diameter of the connecting hole;

[0009] The drive motor is connected to the support base and is located on the side of the volute away from the air guide member; the output shaft of the drive motor can be rotatably inserted into the connecting hole, and the diameter of the output shaft of the drive motor is adapted to the diameter of the connecting hole.

[0010] The impeller assembly is drivingly connected to the output shaft of the driving motor and is suitable for being driven by the driving motor to rotate and increase pressure in the volute.

[0011] Optionally, the coaxial mounting member includes a mounting sealing ring and a symmetrical flange; the mounting sealing ring is sleeved on the symmetrical flange, and two ends of the symmetrical flange respectively protrude from two ends of the mounting sealing ring; the mounting sealing ring is connected to the volute, and the connecting hole is located in the symmetrical flange; wherein, one end of the symmetrical flange close to the volute is penetrated into the first through hole, and the outer diameter of the symmetrical flange is adapted to the diameter of the first through hole.

[0012] Optionally, the main support base is connected to the volute via a connecting disc, and the connecting disc is located between the mounting seal ring and the volute; a second through hole for the symmetrical flange to pass through is opened on the connecting disc along its axial direction.

[0013] Optionally, the connecting disc is coaxially arranged with the first through hole, and the diameter of the second through hole is adapted to the outer diameter of the symmetrical flange.

[0014] Optionally, a first gasket is provided between the connecting disc and the volute.

[0015] Optionally, the mounting sealing ring is provided with a plurality of positioning holes for connecting with the volute bolts.

[0016] Optionally, a second gasket is provided on a side of the mounting sealing ring facing away from the volute, and a first mounting hole is provided on the second gasket corresponding to the positioning hole.

[0017] Optionally, the impeller assembly includes a shaft disk and an impeller, the impeller is sleeved on the shaft disk, and the impeller is provided with a plurality of blades; the shaft disk is sleeved on the output shaft of the drive motor, and the shaft disk is key-connected to the output shaft of the drive motor.

[0018] Optionally, a first keyway is provided at the end of the output shaft of the drive motor, a second keyway is provided in the shaft disc corresponding to the first keyway, and a connecting piece is provided between the first keyway and the second keyway; a shaft end retaining ring is detachably connected to the end of the output shaft of the drive motor, and the shaft end retaining ring is suitable for limiting the movement of the shaft disc in a direction away from the output shaft of the drive motor.

[0019] Optionally, a secondary support base is provided at the bottom of the volute, and the secondary support base is suitable for fixed connection with external equipment.

[0020] The technical solution of the utility model has the following advantages:

[0021] In the utility model, a coaxial mounting piece is correspondingly arranged at the first through hole of the volute, and the connecting hole on the coaxial mounting piece is coaxially arranged with the first through hole. When installing the drive motor, the output shaft of the drive motor is extended into the volute along the connecting hole, and the impeller assembly is driven and connected. Since the diameter of the output shaft of the drive motor is equal to the diameter of the connecting hole, the output shaft of the drive motor is always kept coaxial with the first through hole under the action of the connecting hole, so as to avoid the axis of the output shaft of the drive motor being offset from the axis of the first through hole during the installation of the drive motor or in the use of the drive motor, that is, the axis of the output shaft of the drive motor is offset from the axis of the volute, so as to avoid the impeller assembly from contacting and wearing with the air guide member or the volute after the output shaft of the drive motor is offset, thereby affecting the service life. Since the output shaft of the volute and the drive motor are both made of hard materials such as iron or stainless steel, the output shaft of the drive motor is limitedly supported by the coaxial mounting piece, so as to avoid the output shaft of the drive motor from directly contacting and rubbing with the volute during high-speed rotation to generate sparks, thereby improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of the coating oven fan provided by the utility model at a first viewing angle;

[0024] Figure 2 for Figure 1 Sectional view at AA;

[0025] Figure 3 for Figure 2 Enlarged view of point B in the middle;

[0026] Figure 4 A schematic diagram of the structure of the coaxial mounting member provided by the utility model;

[0027] Figure 5 A schematic diagram of the structure of the coating oven fan provided by the utility model at a second viewing angle;

[0028] Figure 6 A schematic diagram of the structure of the coating oven fan provided by the utility model at a third viewing angle;

[0029] Description of reference numerals:

[0030] 1. Main support base; 2. Volute; 3. Air guide; 4. Connection hole; 5. Drive motor; 6. Install sealing ring; 7. Symmetrical flange; 8. Connecting disc; 9. First gasket; 10. Positioning hole; 11. Second gasket; 12. Shaft disc; 13. Impeller; 14. Blade; 15. First keyway; 16. Shaft end retaining ring; 17. Secondary support base; 18. Air inlet; 19. Air outlet. DETAILED DESCRIPTION

[0031] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] Example 1

[0036] See also Figures 1 to 6A coating oven fan provided in this embodiment includes: a main supporting base 1; a volute 2, connected to the supporting base, a first through hole is provided on one side of the volute 2, and an air guide 3 for air intake is provided coaxially with the first through hole on the other side; a coaxial mounting member is arranged on the side of the volute 2 where the first through hole is provided; a connecting hole 4 coaxial with the first through hole is provided on the coaxial mounting member, and the diameter of the first through hole is larger than the diameter of the connecting hole 4; a driving motor 5, connected to the supporting base and located on the side of the volute 2 away from the air guide 3; the output shaft of the driving motor 5 can be rotatably penetrated in the connecting hole 4, and the diameter of the output shaft of the driving motor 5 is adapted to the diameter of the connecting hole 4; an impeller assembly is drivingly connected to the output shaft of the driving motor 5, and is suitable for being driven by the driving motor 5 to rotate and increase pressure in the volute 2.

[0037] It should be noted that the volute 2 has an air inlet 18 and an air outlet 19 , the air guide 3 is arranged at the air outlet 19 of the volute 2 , and the air outlet 19 is arranged on the peripheral side of the volute 2 .

[0038] In this embodiment, a coaxial mounting piece is provided at the corresponding position of the first through hole of the volute 2, and the connecting hole 4 on the coaxial mounting piece is provided coaxially with the first through hole. When the drive motor 5 is installed, the output shaft of the drive motor 5 is extended into the volute 2 along the connecting hole 4, and the impeller assembly is driven and connected. Since the diameter of the output shaft of the drive motor 5 is adapted to the diameter of the connecting hole 4, the output shaft of the drive motor 5 is always kept coaxial with the first through hole under the action of the connecting hole 4, so as to avoid the axis of the output shaft of the drive motor 5 being offset from the axis of the first through hole during the installation of the drive motor 5 or during the use of the drive motor 5, that is, the axis of the output shaft of the drive motor 5 is offset from the axis of the volute 2, so as to avoid the impeller assembly from contacting and wearing with the air guide 3 or the volute 2 after the output shaft of the drive motor 5 is offset, thereby affecting the service life. Since the output shafts of the volute 2 and the drive motor 5 are both made of hard materials such as iron or stainless steel, the output shaft of the drive motor 5 is limitedly supported by the coaxial mounting piece, so as to avoid the output shaft of the drive motor 5 from directly contacting and rubbing with the volute 2 during high-speed rotation to generate sparks, thereby improving safety.

[0039] Example 2

[0040] As a further improvement to Example 1, Figure 3 and Figure 4 As shown, the coaxial mounting member includes a mounting sealing ring 6 and a symmetrical flange 7; the mounting sealing ring 6 is sleeved on the symmetrical flange 7, and the two ends of the symmetrical flange 7 protrude from the two ends of the mounting sealing ring 6 respectively; the mounting sealing ring 6 is connected to the volute 2, and the connecting hole 4 is located in the symmetrical flange 7; wherein, one end of the symmetrical flange 7 close to the volute 2 is penetrated in the first through hole, and the outer diameter of the symmetrical flange 7 is adapted to the diameter of the first through hole.

[0041] In this embodiment, the sealing ring 6 is installed to connect with the volute 2 for fixation, and at the same time, the two ends of the symmetrical flange 7 protrude from the two ends of the installing sealing ring 6 respectively, so that when the sealing ring 6 is installed to connect with the volute 2, the end of the symmetrical flange 7 close to the volute 2 is inserted into the first through hole. Since the outer diameter of the symmetrical flange 7 is adapted to the diameter of the first through hole, the symmetrical flange 7 maintains coaxiality with the first through hole when inserted into the first through hole, further improving the overall coaxiality. At the same time, the symmetrical flange 7 cooperates with the first through hole for support, further improving stability.

[0042] Specifically, an annular groove is provided on the circumferential side of the symmetrical flange 7 around its axial direction, and the mounting seal ring 6 is fixedly clamped in the annular groove to improve stability.

[0043] Based on the above implementation, in a preferred implementation, Figure 2 , Figure 3 and Figure 5 As shown, the main support base 1 is connected to the volute 2 via a connecting disc 8, and the connecting disc 8 is located between the mounting seal ring 6 and the volute 2; a second through hole for the symmetrical flange 7 to pass through is opened on the connecting disc 8 along its axial direction.

[0044] In this embodiment, the main support base 1 is connected to the volute 2 via a connecting disc 8, which strengthens the connection strength, improves the stability, and prevents the volute 2 from shaking during operation.

[0045] Specifically, the connecting disc 8 is connected to the volute 2 by bolts.

[0046] Specifically, Figure 5 As shown, a plurality of side support plates are provided on the main support base 1, and the side support plates are welded to the connecting disc 8 to improve the connection strength.

[0047] Based on the above implementation, in a preferred implementation, Figure 3 As shown, the connecting disc 8 is coaxially arranged with the first through hole, and the diameter of the second through hole is adapted to the outer diameter of the symmetrical flange 7 .

[0048] In this embodiment, the connecting disk 8 is coaxially arranged with the first through hole, that is, the second through hole is coaxially arranged with the first through hole, and the diameter of the second through hole is adapted to the outer diameter of the symmetrical flange 7. The symmetrical flange 7 is further limited by the second through hole to further ensure the coaxiality of the connecting hole 4 and the first through hole, that is, the overall coaxiality is further improved, and at the same time the supporting strength of the symmetrical flange 7 is increased, thereby further avoiding the displacement of the output shaft of the drive motor 5.

[0049] Based on the above implementation, in a preferred implementation, Figure 2 and Figure 3 As shown, a first gasket 9 is provided between the connecting disc 8 and the volute 2 .

[0050] In this embodiment, the first gasket 9 is added to improve the stability of the connection between the connecting disc 8 and the volute 2.

[0051] Specifically, the first gasket 9 is a silicone disc gasket, which plays a role in shock absorption and preventing the connecting disc 8 and the volute 2 from loosening due to vibration during operation.

[0052] Based on the above implementation, in a preferred implementation, Figure 4 As shown, the mounting seal ring 6 is provided with a plurality of positioning holes 10 for bolt connection with the volute 2 .

[0053] It should be noted that a second mounting hole is provided on the volute 2 corresponding to the positioning hole 10 .

[0054] In this embodiment, a positioning hole 10 is provided on the installation sealing ring 6 to facilitate bolt connection between the installation sealing ring 6 and the volute 2, and the installation sealing ring 6 is positioned so that the connecting hole 4 is coaxially arranged with the first through hole.

[0055] Specifically, a third mounting hole is provided on the connecting disc 8 corresponding to the positioning hole 10, so as to facilitate the fixing and connection of the mounting sealing ring 6, the connecting disc 8 and the volute 2 by bolts.

[0056] Based on the above implementation, in a preferred implementation, Figure 3 and Figure 5 As shown, a second gasket 11 is provided on the side of the mounting seal ring 6 facing away from the volute 2 , and a first mounting hole is provided on the second gasket 11 corresponding to the positioning hole 10 .

[0057] In this embodiment, by providing a second gasket 11 on the side of the installation sealing ring 6 facing away from the volute 2, it is convenient to prevent the bolts from loosening when the installation sealing ring 6 is bolted to the volute 2, thereby improving stability.

[0058] Based on the above implementation, in a preferred implementation, Figure 1 , Figure 3 and Figure 6 As shown, the impeller assembly includes a shaft disc 12 and an impeller 13. The impeller 13 is sleeved on the shaft disc 12, and a plurality of blades 14 are provided on the impeller 13. The shaft disc 12 is sleeved on the output shaft of the driving motor 5, and the shaft disc 12 is key-connected to the output shaft of the driving motor 5.

[0059] It should be noted that the shaft disc 12 is coaxially arranged with the output shaft of the driving motor 5 .

[0060] In this embodiment, the shaft disc 12 and the output shaft of the driving motor 5 are connected by a key, and the driving motor 5 can drive the shaft disc 12 to drive the multiple blades 14 on the impeller 13 to rotate, thereby performing pressurized blowing.

[0061] Specifically, Figure 6 As shown, a plurality of blades 14 are evenly arranged on the impeller 13 around the axial direction of the impeller 13 , and the blades 14 are located on the end surface of the impeller 13 facing the air inlet 18 .

[0062] Based on the above implementation, in a preferred implementation, Figure 3 As shown, a first keyway 15 is provided at the end of the output shaft of the drive motor 5, a second keyway is provided in the shaft disc 12 corresponding to the first keyway 15, and a connecting piece is provided between the first keyway 15 and the second keyway; a shaft end retaining ring 16 is detachably connected to the end of the output shaft of the drive motor 5, and the shaft end retaining ring 16 is suitable for limiting the movement of the shaft disc 12 in a direction away from the output shaft of the drive motor 5.

[0063] In this embodiment, by placing a connecting piece in the first keyway 15 and the second keyway, and at the same time, the shaft disc 12 is sleeved on the output shaft of the drive motor 5, and then the shaft end retaining ring 16 is connected to the end of the output shaft of the drive motor 5, the shaft disc 12 is limited to prevent the shaft disc 12 from shaking along the axial direction on the output shaft of the drive motor 5, thereby improving stability. At the same time, under the action of the connecting piece, the shaft disc 12 can rotate with the rotation of the output shaft of the drive motor 5.

[0064] Specifically, the shaft end retaining ring 16 is screw-connected to the output shaft of the driving motor 5 to facilitate installation and disassembly.

[0065] Specifically, the shaft end retaining ring 16 and the shaft disc 12 are interference fit, and the interference amount is preferably 0.03-0.04 mm, which further improves stability.

[0066] Based on the above implementation, in a preferred implementation, Figure 6 As shown, a secondary support base 17 is provided at the bottom of the volute 2, and the secondary support base 17 is suitable for fixed connection with external equipment.

[0067] In this embodiment, by providing a secondary support base 17 at the bottom of the volute 2, it can be fixed to the bottom surface or fixedly connected to an external device to improve the overall stability.

[0068] The installation and working principle of the coating oven fan provided in this embodiment are as follows: the external equipment can be connected or fixed to the bottom surface for support through the main support base 1 and the auxiliary support base 17, the volute 2, the connecting disc 8 and the mounting sealing ring 6 are connected by bolts, and the symmetrical flange 7 is penetrated in the first through hole and the second through hole, and the outer diameter of the symmetrical flange 7 is adapted to the first through hole and the second through hole, so that the connecting hole 4 in the symmetrical flange 7 is coaxially arranged with the first through hole, so that the connecting hole 4 is also coaxial with the air guide 3, and then the driving motor 5 is connected to the main supporting base 1, and the output shaft of the driving motor 5 extends from the connecting hole 4 into the volute 2 and is connected to the impeller assembly at the end drive, so that under the action of the coaxial mounting part, the overall coaxiality is guaranteed and the installation accuracy is improved. At the same time, the output shaft of the driving motor 5 is limited under the cooperation of the first through hole, the second through hole, the symmetrical flange 7 and the connecting hole 4 to improve the support strength and avoid driving the driving motor 5 during installation or use. The axis of the output shaft of the motor 5 is offset from the axis of the first through hole, that is, the axis of the output shaft of the drive motor 5 is offset from the axis of the volute 2, so as to avoid the impeller assembly from contacting and wearing with the air guide member 3 or the volute 2 after the output shaft of the drive motor 5 is offset, thereby affecting the service life. Since the volute 2 and the output shaft of the drive motor 5 are both made of hard materials such as iron or stainless steel, the output shaft of the drive motor 5 is limitedly supported by a coaxial mounting member, so as to avoid the output shaft of the drive motor 5 from directly contacting and rubbing with the volute 2 during high-speed rotation, thereby generating sparks, thereby improving safety and service life. During use, the impeller 13 is driven by the output shaft of the drive motor 5 to drive the blades 14 to rotate in the volute 2, and the wind enters the volute 2 from the air guide member 3 at the air inlet 18. Since the air guide member 3 and the impeller 13 have an overlapping part, the wind can be introduced into the impeller 13, that is, the air guide member 3 will form a vortex zone when the wind enters to improve the carrying effect. Then, the wind entering the volute 2 is pressurized under the action of the blades 14 and blown out from the air outlet 19. The technical problem that the output shaft of the driving motor 5 and the axial direction of the volute 2 are easily deviated in the existing coating oven fan, the impeller 13 is easily in contact with the air guide 3, resulting in friction damage and shortening the service life is solved.

[0069] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A coating oven fan, characterized in that: include: Main support base (1); A volute (2) connected to the support base, wherein a first through hole is provided on one side of the volute (2), and an air guide (3) for air intake is provided coaxially with the first through hole on the other side; A coaxial mounting member is arranged on a side of the volute (2) provided with a first through hole; the coaxial mounting member is provided with a connecting hole (4) coaxial with the first through hole, and the diameter of the first through hole is larger than the diameter of the connecting hole (4); A drive motor (5) is connected to the support base and is located on a side of the volute (2) away from the air guide member (3); an output shaft of the drive motor (5) is rotatably inserted into the connection hole (4), and a diameter of the output shaft of the drive motor (5) is adapted to a diameter of the connection hole (4); The impeller assembly is drivingly connected to the output shaft of the driving motor (5), and is suitable for being driven by the driving motor (5) to rotate and increase pressure in the volute (2).

2. The coating oven fan according to claim 1, characterized in that: The coaxial mounting member comprises a mounting seal ring (6) and a symmetrical flange (7); the mounting seal ring (6) is sleeved on the symmetrical flange (7), and two ends of the symmetrical flange (7) respectively protrude from two ends of the mounting seal ring (6); the mounting seal ring (6) is connected to the volute (2), and the connecting hole (4) is located in the symmetrical flange (7); wherein one end of the symmetrical flange (7) close to the volute (2) is penetrated in the first through hole, and the outer diameter of the symmetrical flange (7) is adapted to the diameter of the first through hole.

3. The coating oven fan according to claim 2, characterized in that: The main support base (1) is connected to the volute (2) via a connecting disc (8), and the connecting disc (8) is located between the mounting seal ring (6) and the volute (2); a second through hole for the symmetrical flange (7) to pass through is provided on the connecting disc (8) along its axial direction.

4. The coating oven fan according to claim 3, characterized in that: The connecting disc (8) is coaxially arranged with the first through hole, and the diameter of the second through hole is adapted to the outer diameter of the symmetrical flange (7).

5. The coating oven fan according to claim 3, characterized in that: A first gasket (9) is provided between the connecting disc (8) and the volute (2).

6. The coating oven fan according to claim 2, characterized in that: The mounting seal ring (6) is provided with a plurality of positioning holes (10) for bolt connection with the volute (2).

7. The coating oven fan according to claim 6, characterized in that: A second gasket (11) is provided on the side of the mounting seal ring (6) facing away from the volute (2), and a first mounting hole is provided on the second gasket (11) corresponding to the positioning hole (10).

8. The coating oven fan according to any one of claims 1 to 7, characterized in that: The impeller assembly comprises a shaft disc (12) and an impeller (13); the impeller (13) is sleeved on the shaft disc (12), and a plurality of blades (14) are provided on the impeller (13); the shaft disc (12) is sleeved on the output shaft of the drive motor (5), and the shaft disc (12) is key-connected to the output shaft of the drive motor (5).

9. The coating oven fan according to claim 8, characterized in that: A first keyway (15) is provided at the end of the output shaft of the drive motor (5), a second keyway is provided in the shaft disc (12) corresponding to the first keyway (15), and a connecting piece is provided between the first keyway (15) and the second keyway; a shaft end retaining ring (16) is detachably connected to the end of the output shaft of the drive motor (5), and the shaft end retaining ring (16) is suitable for limiting the movement of the shaft disc (12) in a direction away from the output shaft of the drive motor (5).

10. The coating oven fan according to claim 1, characterized in that: A secondary support base (17) is provided at the bottom of the volute (2), and the secondary support base (17) is suitable for being fixedly connected to an external device.

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