Induction motor

Abstract

The utility model discloses an induction motor, which comprises a shell, a rotor assembly, a stator assembly and a junction box, the rotor assembly is rotatably arranged in the shell; an insulating shaft sleeve is arranged at one end of the rotor assembly; the stator assembly is located in the shell and arranged on the rotor assembly in a sleeving mode. The junction box is arranged on the outer side of the shell, the junction box is an insulating part, and a capacitor is arranged in the junction box. Compared with the prior art, electric leakage of the motor is reduced, so that potential safety hazards are reduced.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to an induction motor. Background Technology

[0002] An induction motor is a type of motor that uses electromagnetic induction between the stator and rotor to induce current in the rotor, thereby achieving electromechanical energy conversion.

[0003] Insulating components are crucial parts of an electric motor, used to isolate live and non-live conductors, ensuring normal operation and preventing accidents such as electric shock and fire. However, most current motors only have a single layer of insulation. If this insulation is damaged, leakage and fire may occur during motor use, posing a risk to life and property.

[0004] For example, Chinese utility model patent No. 202122711553.6 (authorization announcement No. CN215071869U) discloses "A stator assembly based on a micro energy-saving induction motor". This stator assembly includes a silicon steel ring I, an electromagnetic coil movably connected to the surface of the silicon steel ring I, a silicon steel ring II movably connected to the outer side of the electromagnetic coil, an insulating sleeve fixedly connected to the surface of the silicon steel ring II, a motor rotor movably connected to the inside of the silicon steel ring I, insulating rings movably connected to both the front and back of the insulating sleeve, fixing mechanisms on both sides of the inner side of the insulating ring, and connecting mechanisms on the top and bottom of the outer side of the insulating ring. This utility model, by using an insulating sleeve, can enclose and insulate the silicon steel ring I, the electromagnetic coil, and the silicon steel ring II, preventing leakage. However, this utility model only uses an insulating sleeve for insulation, providing only one layer of insulation. If the insulating sleeve is damaged, there is a high risk of motor leakage and fire during motor use. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an induction motor that is less prone to leakage, in light of the above-mentioned technical situation.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: an induction motor, comprising...

[0007] case;

[0008] The rotor assembly, the rotatable portion of which is housed within the housing; and,

[0009] The stator assembly is located inside the housing and is fitted onto the rotor assembly;

[0010] Its characteristic is that: one end of the rotor assembly is provided with an insulating bushing;

[0011] Induction motors also include

[0012] The junction box is located on the outside of the housing. The junction box is an insulating component and contains a capacitor that is electrically connected to the stator assembly.

[0013] Preferably, the induction motor further includes a fan located at the other end of the rotor assembly and rotating coaxially with the rotor assembly. The fan is located outside the housing, and the housing has multiple ventilation holes for gas to flow through.

[0014] Preferably, the stator assembly includes:

[0015] The stator core has multiple teeth spaced apart on its inner side, and a winding groove is formed between two adjacent teeth. The winding groove has an opening on the side of the inner peripheral wall of the stator core.

[0016] Slotted paper is disposed in the winding slot, and each slotted paper covers at least a portion of the corresponding winding slot;

[0017] A slot wedge is placed inside the winding slot and can block the opening of the winding slot. The slot paper and the slot wedge in the same winding slot surround each other to form a receiving channel.

[0018] The stator winding is wound around the stator core and partially disposed within the receiving channel; the stator winding is electrically connected to the capacitor. The slot paper and slot wedges are insulating components; the junction box and insulating bushing respectively form a double insulation structure with the slot paper and slot wedges.

[0019] Preferably, the rotor assembly includes:

[0020] A rotating shaft, wherein the insulating shaft is sleeved at one end of the rotating shaft, and the fan is located at the other end of the rotating shaft;

[0021] A rotor core, mounted on a rotating shaft and rotating coaxially with the shaft; and,

[0022] The rotor winding is wound on the rotor core.

[0023] To facilitate heat dissipation, preferably, the housing has multiple heat dissipation holes.

[0024] To facilitate the assembly of the housing and the installation of the stator and rotor assemblies, preferably, the housing comprises:

[0025] The casing has multiple ventilation holes for heat dissipation.

[0026] A first end cover is provided at one end of the housing, and one end of the rotating shaft is rotatably mounted on the first end cover. A first bearing is provided between the rotating shaft and the first end cover.

[0027] The second end cover is located at one end of the housing, and the other end of the rotating shaft is rotatably mounted on the second end cover. A second bearing is provided between the rotating shaft and the second end cover.

[0028] Preferably, the housing is cylindrical, and the bottom of the housing is provided with a base that can be connected to external equipment.

[0029] To facilitate gas flow and enable the fan to dissipate heat, preferably, both the first end cover and the second end cover are provided with multiple perforated ventilation holes.

[0030] For mounting the capacitor, preferably, the junction box includes...

[0031] The box has an opening at the top and is located on the outside of the shell, with the capacitor located inside the box;

[0032] The top cover has an opening at the top of the box body, and the box body and the top cover are insulating components.

[0033] Preferably, the bottom of the box is provided with a plurality of hollow mounting posts, and correspondingly, the housing is provided with a plurality of mounting holes, and bolts pass through the mounting holes and mounting posts to fix the junction box and the housing.

[0034] To facilitate the placement of wires, preferably, the bottom of the box is provided with a first guide opening through which the power supply wire passes, and the housing is provided with a second guide opening corresponding to the first guide opening, and a wire protection sleeve is provided inside the second guide opening.

[0035] Compared with the prior art, the advantages of this utility model are as follows: one end of the rotor assembly is provided with an insulating bushing, and the junction box is an insulating component with a double insulation structure. If one insulation structure is damaged during the use of the motor, the other insulation structure still exists, which can reduce motor leakage and thus reduce safety hazards. In addition, it is relatively simple to install the insulating bushing and to make the junction box an insulating component, and the production efficiency is high. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0037] Figure 2 This is an exploded view of an embodiment;

[0038] Figure 3 This is a cross-sectional view of an embodiment;

[0039] Figure 4 This is a schematic diagram of the junction box for an embodiment;

[0040] Figure 5 This is an exploded view of the stator assembly in an embodiment. Detailed Implementation

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0042] like Figure 1-5 The figure shown is a preferred embodiment of the present invention.

[0043] The induction motor includes a housing 1, a rotor assembly 2, a stator assembly 3, a junction box 4, and a fan 5.

[0044] The housing 1 includes a casing 12, a first end cover 13, and a second end cover 14. The casing 12 has multiple heat dissipation holes 11 for heat dissipation. The first end cover 13 is located at one end of the casing 12, and one end of the rotor assembly 2's shaft 22 is rotatably mounted on the first end cover 13. A first bearing 7 is provided between the shaft 22 and the first end cover 13. The second end cover 14 is located at one end of the casing 12, and the other end of the rotor assembly 2's shaft 22 is rotatably mounted on the second end cover 14. A second bearing 8 is provided between the shaft 22 and the second end cover 14. Both the first end cover 13 and the second end cover 14 have multiple perforated ventilation holes 15.

[0045] The rotor assembly 2 is housed within the housing 1; one end of the rotor assembly 2 is provided with an insulating bushing 21; the rotor assembly 2 includes a rotating shaft 22, a rotor core 23, and rotor windings 24. Figure 2 As shown, an insulating bushing 21 is located at one end of the rotating shaft 22, and a fan 5 is located at the other end of the rotating shaft 22 and rotates coaxially with the rotor assembly 2. The rotating shaft 22 is rotatably connected to the housing 1. The rotor core 23 is located on the rotating shaft 22 and rotates coaxially with the rotating shaft 22; the rotor winding 24 is wound on the rotor core 23.

[0046] Stator assembly 3 is located inside housing 1 and is fitted onto rotor assembly 2; such as Figure 5 As shown, the stator assembly 3 includes a stator core 31, slot paper 32, slot wedge 33, and stator winding 34. The inner surface of the stator core 31 is provided with multiple teeth spaced apart, forming a winding slot between two adjacent teeth. An opening is provided on the side of the winding slot adjacent to the inner peripheral wall of the stator core 31. Slot paper 32 is disposed within the winding slot, with each slot paper 32 covering at least a portion of the corresponding winding slot. Slot wedge 33 is disposed within the winding slot and can block the opening of the winding slot. The slot paper 32 and slot wedge 33 within the same winding slot surround each other to form a receiving channel. The stator winding 34 is wound around the stator core 31 and partially disposed within the receiving channel.

[0047] Junction box 4 is located on the outside of housing 1. Junction box 4 is an insulating component, and capacitor 41 is installed inside junction box 4. Figure 4As shown, the junction box 4 includes a box body 42 and a top cover 43, both of which are insulating components. The top of the box body 42 is open and located on the outside of the housing 1, with the capacitor 41 located inside the box body 42; the top cover 43 is located at the top opening of the box body 42. The bottom of the box body 42 has multiple hollow mounting posts 44, and correspondingly, the housing 1 has multiple mounting holes 16. Bolts pass through the mounting holes 16 and mounting posts 44 to fix the junction box 4 and the housing 1. The bottom of the box body 42 also has a first guide port 46 through which the power supply line passes, and the housing 1 has a second guide port 17 corresponding to the first guide port 46, with a cable sleeve 45 inside the second guide port 17. A base 6 is located on the side of the housing 1 away from the junction box 4 for connecting to external devices.

Claims

1. An induction motor, comprising Shell (1); The rotor assembly (2) is rotatably disposed within the housing (1); and, The stator assembly (3) is located inside the housing (1) and is fitted onto the rotor assembly (2); Its features are: An insulating bushing (21) is provided at one end of the rotor assembly (2); Induction motors also include A junction box (4) is located on the outside of the housing (1). The junction box (4) is an insulating component, and a capacitor (41) electrically connected to the stator assembly (3) is provided inside the junction box (4).

2. The induction motor according to claim 1, characterized in that: The induction motor also includes a fan (5) located at the other end of the rotor assembly (2) and rotating coaxially with the rotor assembly (2). The fan (5) is located outside the housing (1), and the housing (1) is provided with a plurality of ventilation holes (15) through which gas flows.

3. The induction motor according to claim 1, characterized in that: The stator assembly (3) includes: The stator core (31) has multiple teeth spaced apart on its inner side, and a winding groove is formed between two adjacent teeth. The winding groove has an opening on the side of the inner peripheral wall of the stator core (31). Slot paper (32) is disposed in the winding slot, and each slot paper (32) covers at least a portion of the corresponding winding slot; A slot wedge (33) is disposed within the winding slot and can block the opening of the winding slot; the slot paper (32) and the slot wedge (33) within the same winding slot surround each other to form a receiving channel; and, The stator winding (34) is wound around the stator core (31) and partially located within the receiving channel.

4. The induction motor according to claim 2, characterized in that: The rotor assembly (2) includes: A rotating shaft (22) is rotatably connected to the housing (1), and an insulating bushing (21) is provided at one end of the rotating shaft (22); A rotor core (23) is mounted on a rotating shaft (22) and rotates coaxially with the rotating shaft (22); and, The rotor winding (24) is wound on the rotor core (23).

5. The induction motor according to claim 4, characterized in that: The housing (1) includes: The housing (12) has multiple heat dissipation holes (11) for heat dissipation. A first end cover (13) is provided at one end of the housing (12), and one end of a rotating shaft (22) is rotatably mounted on the first end cover (13). A first bearing (7) is provided between the rotating shaft (22) and the first end cover (13); and, The second end cover (14) is located at one end of the housing (12), and the other end of the rotating shaft (22) is rotatably mounted on the second end cover (14). A second bearing (8) is provided between the rotating shaft (22) and the second end cover (14).

6. The induction motor according to claim 5, characterized in that: The housing (12) is cylindrical, and the bottom of the housing (12) is provided with a base (6) that can be connected to external equipment.

7. The induction motor according to claim 5, characterized in that: The first end cap (13) and the second end cap (14) are each provided with a plurality of hollowed-out ventilation holes (15).

8. The induction motor according to claim 1, characterized in that: The junction box (4) includes The box (42) has an opening at the top and is located on the outside of the shell (1), and the capacitor (41) is located inside the box (42); The top cover (43) is located at the top opening of the box body (42).

9. The induction motor according to claim 8, characterized in that: The bottom of the box (42) is provided with a plurality of hollow mounting posts (44), and the corresponding housing (1) is provided with a plurality of mounting holes (16). Bolts pass through the mounting holes (16) and the mounting posts (44) to fix the junction box (4) and the housing (1).

10. The induction motor according to claim 8, characterized in that: The bottom of the box (42) is provided with a first guide port (46) through which the power supply line passes, and the shell (1) is provided with a second guide port (17) corresponding to the first guide port (46), and a wire protection sleeve (45) is provided inside the second guide port (17).

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