An assembled rotor fan structure

Abstract

This utility model relates to the field of rotor fan technology and discloses an assembled rotor fan structure, including: a fan base, a fan end ring, and multiple fan blades mounted on a motor rotor shaft; the fan base is fixed to the motor rotor shaft by a positioning key and an interference fit, and the fan end ring is mounted on the fan base. This assembled rotor fan structure, by setting up a fan base, fan end ring, and fan blades, with the fan blades independently fixed to the fan end ring by bolts and nuts, allows for easy adjustment of air pressure or replacement of individual components without replacing the entire fan. This simplifies operation, significantly reducing maintenance costs and time. Loosening the nuts allows for adjustment of the fan blade angle. The distribution and angle of the fan blades are designed to provide a suitable internal air pressure value for the motor, uniformly introducing cool air into the internal space of the motor stator and rotor, and achieving heat exchange through the air duct.

Description

Technical Field

[0001] This utility model relates to the field of rotor fan technology, specifically to an assembled rotor fan structure. Background Technology

[0002] High-speed, large-scale synchronous motors are core power equipment in modern industry, and their operational reliability is of paramount importance. During operation, the coils and iron core generate a large amount of heat due to electromagnetic effects, leading to temperature rise. Temperature rise is a key indicator for measuring motor performance; excessively high temperature rise accelerates the aging of insulation materials, directly jeopardizing the motor's insulation performance, shortening its lifespan, and even causing equipment failure.

[0003] For large synchronous motors with high speed, high power and high protection requirements, their internal structure is usually relatively compact and sealed. When the internal ventilation pressure generated by the centrifugal fan motor is insufficient during operation, the cooling airflow will not be able to reach the core heat-generating areas such as the iron core and coils of the stator and rotor effectively and evenly. Currently, the number and structure of the centrifugal fan blades are fixed. When it is found that the internal ventilation pressure generated by the motor is insufficient during operation, it is difficult to adjust and the fan needs to be replaced, which is quite troublesome. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an assembled rotor fan structure, which solves the problems mentioned in the background.

[0005] This utility model provides the following technical solution: an assembled rotor fan structure, including: a fan base, a fan end ring, and multiple fan blades mounted on a motor rotor shaft;

[0006] The fan mount is fixed to the motor rotor shaft by a positioning key and by heat fitting with an interference fit, and the fan end ring is mounted on the fan mount.

[0007] The surface of the fan end ring is provided with multiple adjustment and positioning holes, and the multiple adjustment and positioning holes are evenly distributed along the circumference of the fan end ring. The fan blades are installed on the inner wall of the adjustment and positioning holes by nuts.

[0008] Preferably, the end face of the fan end ring is provided with a plurality of mounting holes evenly distributed around the circumference, and the surface of the fan base is provided with a connecting hole corresponding to the mounting hole. A fixing bolt is connected to the inner wall of the mounting hole, and one end of the fixing bolt is threaded to the inner wall of the connecting hole.

[0009] Preferably, the fan blade includes a blade portion and a bolt portion, the blade portion is integrally formed and connected to one end of the bolt portion, and the other end of the bolt portion passes through an adjustment and positioning hole and is threadedly connected to the inner wall of the nut.

[0010] Preferably, the surfaces of the bolt portion are respectively fitted with anti-slip washers and locking washers. The anti-slip washers are connected to the inner wall of the fan end ring, and the locking washers are located on the side of the anti-slip washers away from the blade portion and are connected to the surface of the nut.

[0011] Preferably, the inner wall of the adjustment positioning hole is provided with a limiting groove, and the inner wall of the limiting groove is connected to the surface of the blade portion.

[0012] Preferably, the fan base is made of steel and the fan blades are made of cast aluminum.

[0013] Preferably, the number of fan blades distributed circumferentially is 25, and the height of the fan blades is 120mm.

[0014] Preferably, the outer diameter of the assembled rotor fan structure is 1340mm.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This assembled rotor fan structure, by setting up a fan base, a fan end ring, and fan blades, allows the fan blades to be independently fixed to the fan end ring by bolts and nuts. When it is necessary to adjust the air pressure or individual components are damaged, it is not necessary to replace the entire fan. The fan blades can be adjusted or replaced individually, which is simple to operate and greatly reduces maintenance costs and time. The angle of the fan blades can be adjusted by loosening the nuts. The distribution of the number and angle of the fan blades is designed to provide a suitable air pressure value inside the motor, so as to evenly introduce the cold air into the internal space of the motor stator and rotor and achieve heat exchange through the air guide duct. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a side sectional view of the structure at position AA of this utility model.

[0019] In the diagram: 1. Motor rotor shaft; 2. Fan base; 3. Fan end ring; 4. Fan blade; 41. Blade section; 42. Bolt section; 5. Adjustment and positioning hole; 6. Nut; 7. Mounting hole; 8. Connecting hole; 9. Fixing bolt; 10. Anti-slip washer; 11. Stop washer; 12. Limiting groove. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-2 An assembled rotor fan structure includes: a fan base 2, a fan end ring 3, and multiple fan blades 4 mounted on a motor rotor shaft 1;

[0022] The fan base 2 is fixed to the motor rotor shaft 1 by a positioning key and by heat fitting with an interference fit, and the fan end ring 3 is installed on the fan base 2;

[0023] The surface of the fan end ring 3 is provided with multiple adjustment positioning holes 5, and the multiple adjustment positioning holes 5 are evenly distributed along the circumference of the fan end ring 3. The fan blade 4 is installed on the inner wall of the adjustment positioning holes 5 by means of nuts 6.

[0024] The end face of the fan end ring 3 is evenly provided with multiple mounting holes 7 along the circumference, and the surface of the fan base 2 is provided with connecting holes 8 corresponding to the mounting holes 7. The inner wall of the mounting hole 7 is connected with a fixing bolt 9, and one end of the fixing bolt 9 is threadedly connected to the inner wall of the connecting hole 8.

[0025] The fan blade 4 includes a blade section 41 and a bolt section 42. The blade section 41 is integrally formed and connected to one end of the bolt section 42. The other end of the bolt section 42 passes through the adjustment and positioning hole 5 and is threadedly connected to the inner wall of the nut 6.

[0026] Anti-slip washer 10 and stop washer 11 are respectively fitted on the surface of bolt part 42. Anti-slip washer 10 is connected to the inner wall of fan end ring 3. Stop washer 11 is located on the side of anti-slip washer 10 away from blade part 41 and is connected to the surface of nut 6. Limit groove 12 is opened in the inner wall of adjustment positioning hole 5. The inner wall of limit groove 12 is connected to the surface of blade part 41.

[0027] In one specific embodiment, the fan base 2 is made of steel, the fan blades 4 are made of cast aluminum, the number of fan blades 4 distributed circumferentially is 25, the height of the fan blades 4 is 120mm, and the outer diameter of the assembled rotor fan structure is 1340mm.

[0028] The fan blade 4 is independently fixed to the fan end ring 3 by bolt 42 and nut 6. When it is necessary to adjust the air pressure or individual parts are damaged, it is not necessary to replace the entire fan. The fan blade 4 can be adjusted or replaced separately. The operation is simple and greatly reduces maintenance costs and time. The angle of the fan blade 4 can be adjusted by loosening the nut 6. The distribution of the number of fan blades 4 and the angle distribution of the fan blades 4 are set to provide a structure that can provide a suitable air pressure value inside the motor, so as to evenly introduce the cold air into the internal space of the motor stator and rotor and achieve heat exchange through the air guide channel.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A prefabricated rotor fan structure, characterized in that, include: Fan mount (2), fan end ring (3) and multiple fan blades (4) are mounted on the motor rotor shaft (1); The fan base (2) is fixed to the motor rotor shaft (1) by a positioning key and by an interference fit, and the fan end ring (3) is installed on the fan base (2); The surface of the fan end ring (3) is provided with multiple adjustment positioning holes (5), and the multiple adjustment positioning holes (5) are evenly distributed along the circumference of the fan end ring (3). The fan blade (4) is installed on the inner wall of the adjustment positioning hole (5) by a nut (6).

2. The assembled rotor fan structure according to claim 1, characterized in that: The end face of the fan end ring (3) is provided with a plurality of mounting holes (7) evenly distributed around the circumference, and the surface of the fan seat (2) is provided with a connecting hole (8) corresponding to the mounting hole (7). The inner wall of the mounting hole (7) is connected with a fixing bolt (9), and one end of the fixing bolt (9) is threadedly connected to the inner wall of the connecting hole (8).

3. The assembled rotor fan structure according to claim 1, characterized in that: The fan blade (4) includes a blade section (41) and a bolt section (42). The blade section (41) is integrally formed and connected to one end of the bolt section (42). The other end of the bolt section (42) passes through the adjustment and positioning hole (5) and is threadedly connected to the inner wall of the nut (6).

4. The assembled rotor fan structure according to claim 3, characterized in that: The surface of the bolt part (42) is fitted with an anti-slip washer (10) and a stop washer (11). The anti-slip washer (10) is connected to the inner wall of the fan end ring (3). The stop washer (11) is located on the side of the anti-slip washer (10) away from the blade part (41) and is connected to the surface of the nut (6).

5. The assembled rotor fan structure according to claim 3, characterized in that: The inner wall of the adjustment positioning hole (5) is provided with a limiting groove (12), and the inner wall of the limiting groove (12) is connected to the surface of the blade part (41).

6. The assembled rotor fan structure according to claim 1, characterized in that: The fan base (2) is made of steel, and the fan blades (4) are made of cast aluminum.

7. The assembled rotor fan structure according to claim 1, characterized in that, The number of blades (4) distributed circumferentially is 25, and the height of the blades (4) is 120mm.

8. The assembled rotor fan structure according to claim 1, characterized in that, The outer diameter of the assembled rotor fan structure is 1340mm.

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