Explosion-proof rear end cover of alternating-current generator

Abstract

The utility model discloses an explosion-proof rear end cover of an AC generator. The explosion-proof rear end cover comprises a swing driver; the connecting seat is fixed with the swing driver; the grinding mechanism is fixed to the connecting base; the dust collection assembly is fixed to the connecting base; the lifting driver is located on one side of the polishing mechanism, and the blowing mechanism is connected with the lifting driver; and the control unit is electrically connected with the swing driver, the polishing mechanism, the dust collection assembly, the lifting driver and the blowing mechanism. The surface of the stator lead is automatically polished, so that the welding spot quality and the welding efficiency can be subsequently improved.

Description

Technical Field

[0001] This utility model relates to the technical field of AC generator rear end cover, specifically to an explosion-proof AC generator rear end cover. Background Technology

[0002] An alternating current generator (AC generator) utilizes the principle of electromagnetic induction—where a conductor cutting magnetic lines of force induces an electromotive force—to convert the mechanical energy of a prime mover into electrical energy output. An AC generator consists of a stator, rotor, front cover, rear cover, and other components. The stator is the armature that generates electricity, and the rotor is the magnetic pole. The stator comprises an armature core, three evenly spaced three-phase windings, a frame, and end covers. The rotor is typically a salient-pole type, consisting of an excitation winding, core, shaft, retaining rings, and center ring. A direct current flows through the rotor's excitation winding, generating a near-sinusoidal magnetic field (called the rotor magnetic field), whose effective excitation flux links with the stationary armature windings. As the rotor rotates, the rotor magnetic field rotates along with it. With each revolution, the magnetic lines of force sequentially cut each phase of the stator windings, inducing a three-phase alternating electromotive force within the three-phase stator windings. When the generator operates under a symmetrical load, the three-phase armature currents combine to generate a rotating magnetic field operating at synchronous speed. The interaction between the stator and rotor magnetic fields produces a braking torque.

[0003] The rear end cover serves to support the rectifier, regulator, and brush holder, while also venting carbon dust. For alternators, the rear end cover is a crucial component. Existing alternator rear end covers typically have dust vents on the side to expel carbon dust generated by brush friction from the slip ring chamber.

[0004] The generator with the above structure has the following shortcomings: On a ship, the engine room is sealed, and the concentration of flammable gases such as methane inside is high. The carbon powder generated by the friction between the slip ring and the carbon brush can easily be discharged through the powder discharge hole, igniting the gas and causing an explosion. Summary of the Invention

[0005] This invention provides an explosion-proof rear end cover for an AC generator. This invention can reduce carbon powder discharge and pass the explosion-proof test.

[0006] The explosion-proof rear end cover of the alternator includes an upper connecting ring, connecting ribs, a lower connecting ring, a connecting seat, a slip ring, and supporting ribs. There are multiple connecting ribs arranged circumferentially along the upper connecting ring. The connecting ribs are fixed to the upper connecting ring and the lower connecting ring respectively. The connecting seat is fixed to the upper connecting ring and the lower connecting ring respectively. The upper connecting ring surrounds the slip ring. The supporting ribs are fixed to the upper connecting ring and the slip ring respectively. The slip ring is provided with a powder discharge hole. It also includes a mesh component for attaching and cooling at least a portion of the toner. The mesh component cooperates with the powder discharge hole.

[0007] Furthermore, the powder discharge hole is a stepped hole, and the steps inside the powder discharge hole provide axial positioning for the mesh component.

[0008] Furthermore, the mesh component is located inside the powder discharge hole and fixed to the collector ring.

[0009] Furthermore, the mesh component is interference-fitted with the powder discharge hole.

[0010] Furthermore, an annular component is provided on the inner circumferential surface of the upper connecting ring, and the annular component has a first mounting hole for mounting the rectifier.

[0011] Furthermore, the support rib is provided with a boss for cooperating with the rectifier, and the boss and the support rib are provided with a second mounting hole for mounting the rectifier.

[0012] A mesh component is installed inside the powder discharge hole of the rear cover by riveting, ensuring that the mesh component has the appropriate pull-out strength and can withstand certain vibrations or thermal shocks without falling off. Some of the carbon powder exiting from the collector ring's chamber is adsorbed and cooled by the mesh component, reducing the possibility of flammable gas being ignited. Attached Figure Description

[0013] Figure 1 This is a 3D view of the explosion-proof rear end cover of an AC generator.

[0014] Figure 2 This is a cross-sectional view of the explosion-proof rear end cover of an AC generator.

[0015] Figure 3 This is a schematic diagram showing the rectifier installed on the rear cover.

[0016] Labels in the attached diagram:

[0017] Upper connecting ring 1, space 1a, connecting rib 2, lower connecting ring 3, connecting seat 4, collector ring 5, powder discharge hole 5a, supporting rib 6, mesh component 7, ring component 8, first mounting hole 8a, boss 9, second mounting hole 10, rectifier A. Detailed Implementation

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art are briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained based on the drawings without creative effort, and these embodiments are still within the protection scope of the claims of this utility model.

[0019] like Figures 1 to 3The explosion-proof rear end cover of the AC generator of this utility model includes an upper connecting ring 1, a connecting rib 2, a lower connecting ring 3, a connecting seat 4, a collector ring 5, a supporting rib 6, and a mesh component 7. There are multiple connecting ribs 2 arranged along the circumference of the upper connecting ring 1. The connecting ribs 2 are fixed to the upper connecting ring 1 and the lower connecting ring 3 respectively. There is a space 1a between adjacent connecting ribs 2, and the space 1a is used for airflow.

[0020] The connecting seat 4 is fixed to the upper connecting ring 1 and the lower connecting ring 3 respectively, and the connecting seat 4 is used for assembly with the housing of the AC motor. The upper connecting ring 1 surrounds the slip ring 5, and the supporting ribs 6 are arranged radially along the upper connecting ring 1. There are multiple supporting ribs 6, which are evenly arranged circumferentially along the upper connecting ring 1. The supporting ribs 6 are fixed to the upper connecting ring 1 and the slip ring 5 respectively. In this embodiment, the supporting ribs 6 are integrally formed with the upper connecting ring 1 and the slip ring 5 by casting.

[0021] The collector ring 5 is used to mount carbon brushes. The collector ring 5 is provided with a dust discharge hole 5a, which is used to discharge carbon dust generated by the friction of the carbon brushes from the collector ring chamber. In this embodiment, the dust discharge hole 5a is preferably a stepped hole.

[0022] The mesh component 7 is used to attach and cool at least a portion of the toner, and it mates with the toner discharge hole 5a. The mesh component 7 is made of steel; therefore, it is a steel mesh. In this embodiment, since the toner discharge hole 5a is a stepped hole, after the mesh component 7 enters the hole, the step within the hole 5a axially positions the mesh component 7.

[0023] The mesh component 7 is located inside the powder discharge hole 5a and fixed to the collector ring 5. In this embodiment, the mesh component 7 is riveted to the collector ring 5, so that the mesh component 7 has the corresponding pull-out strength, thereby enabling the mesh component 7 to withstand vibration or thermal shock without falling off.

[0024] An annular component 8 is provided on the inner circumferential surface of the upper connecting ring 1. The annular component 8 has a first mounting hole 8a for mounting the rectifier A. The annular component 8 supports the rectifier A. The support rib 6 has a boss 9 for cooperating with the rectifier A. The boss 9 and the support rib 6 have a second mounting hole 10 for mounting the rectifier A.

Claims

1. An explosion-proof rear end cover of an alternator, comprising an upper connecting ring (1), connecting ribs (2), a lower connecting ring (3), a connecting seat (4), a current collecting ring (5), and a supporting rib (6), the connecting ribs (2) are multiple and arranged along the circumference of the upper connecting ring (1), the connecting ribs (2) are fixed with the upper connecting ring (1) and the lower connecting ring (3) respectively, the connecting seat (4) is fixed with the upper connecting ring (1) and the lower connecting ring (3) respectively, the upper connecting ring (1) surrounds the current collecting ring (5), the supporting rib (6) is fixed with the upper connecting ring (1) and the current collecting ring (5) respectively, and the current collecting ring (5) is provided with a powder discharging hole (5a), characterized in that, Also included is a mesh member (7) for attaching and cooling at least a portion of the carbon powder, the mesh member (7) cooperating with the powder discharge hole (5a).

2. The explosion-proof rear end cover of an alternator according to claim 1, characterized in that, The powder discharge hole (5a) is a stepped hole, the step in the powder discharge hole (5a) axially positioning the mesh member (7).

3. The explosion-proof rear end cover of an alternator according to claim 1 or 2, characterized in that, The mesh member (7) is located in the powder discharge hole (5a) and is fixed to the collector ring (5).

4. The explosion-proof rear end cover of an alternator according to claim 3, characterized in that, The mesh member (7) is interference fit with the powder discharge hole (5a).

5. The explosion-proof rear end cover of an alternator according to claim 1, characterized in that, An annular member (8) is provided on the inner circumferential surface of the upper connecting ring (1), the annular member (8) having a first mounting hole (8a) for mounting the rectifier (A).

6. The explosion-proof rear end cover of an alternator according to claim 1, characterized in that, A boss (9) is provided on the support rib (6) for cooperating with the rectifier (A), the boss (9) and the support rib (6) having a second mounting hole (10) for mounting the rectifier (A).

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