Novel switched reluctance generator

Abstract

The utility model belongs to generator technical field especially a new type switch reluctance generator, including stator and with the coaxial heart setting rotor of stator. The inner wall protruding part of stator is fixedly installed with coil winding, the outer surface of rotor is fixedly installed with rotor tooth. The stator is composed of a plurality of same model stator punching sheet superposition, and the rotor is composed of a plurality of same model rotor punching sheet. The inside of stator punching sheet and rotor punching sheet is equipped with pressure balance mechanism. The new type switch reluctance generator, through setting pressure balance mechanism, not only can realize balance to the recess between stator and rotor pressure, reduce the effect of wind resistance, still can utilize the process of balancing pressure in the rotation process of rotor, realizes the cooling of breathing type, and sets up in recess away from coil winding and rotor, will not influence the magnetic flux between coil winding and rotor tooth.

Description

Technical Field

[0001] This utility model relates to the field of generator technology, and in particular to a novel switched reluctance generator. Background Technology

[0002] In existing technologies, such as the switched reluctance generator and its rotor and rotor laminations disclosed in Chinese patent publication CN 208939692U, this invention optimizes the rotor tooth shape of the switched reluctance generator by tilting the central axis of the rotor teeth to the right. This optimizes the phase inductance curve of the switched reluctance generator, increasing the rate of change of the phase inductance in the descending segment of the curve. Without changing other structural and control strategies, this increases the generator's torque and power output, thus improving its efficiency. However, the following shortcomings still exist:

[0003] When the stator and rotor laminations are stacked and running, the heat generated cannot dissipate quickly, especially at the recesses between the stator and rotor laminations, which can cause problems during rotation. Figure 1 As shown: a) When the recesses of the rotor laminations rotate to be opposite the recesses of the stator laminations, the volume of the two recesses is at its maximum and the pressure is at its minimum; b) When the salient poles of the rotor laminations rotate to be opposite the recesses of the stator laminations, the volume is at its minimum and the pressure is at its maximum. Moreover, the pressure at these two locations changes the most rapidly with increasing rotational speed. The airflow caused by this pressure difference can only flow through the gap between the rotor and stator. However, a large gap will affect power generation efficiency, while a small gap will cause air resistance problems due to the pressure difference. Utility Model Content

[0004] Based on the existing technical problems, this utility model proposes a novel switched reluctance generator.

[0005] This utility model proposes a novel switched reluctance generator, which includes a stator and a rotor coaxially arranged with the stator.

[0006] The inner wall protrusion of the stator is fixedly equipped with a coil winding, and the outer surface of the rotor is fixedly equipped with rotor teeth.

[0007] The stator is composed of multiple stator laminations of the same type stacked together, and the rotor is composed of multiple rotor laminations of the same type.

[0008] Both the stator laminations and the rotor laminations are equipped with pressure balancing mechanisms. When the rotor rotates, the pressure balancing mechanisms perform flow balancing on the pressure inside the cavity between the stator and the rotor.

[0009] Preferably, the pressure balancing mechanism includes a fixed ventilation cavity formed inside the stator lamination, the fixed ventilation cavity being formed in a cavity in the inner wall of the stator, and the inner wall of the fixed ventilation cavity being funnel-shaped.

[0010] The above technical solution facilitates gas flow through the horn-shaped fixed ventilation cavity.

[0011] Preferably, the pressure balancing mechanism further includes a dynamic ventilation cavity formed inside the rotor lamination, the dynamic ventilation cavity being formed in a groove inside the rotor lamination.

[0012] By using the above technical solution, the negative impact on magnetic flux can be minimized by creating a groove inside the rotor lamination.

[0013] Preferably, ventilation holes are provided at the center of the rotor lamination, distributed in a ring array along the rotor lamination, and the inner wall of the ventilation holes is provided with a spiral groove. The plurality of ventilation holes are opened radially along the rotor lamination and communicate with the inner wall of the spiral groove.

[0014] The above technical solution can bring a small amount of cooling air into the ventilation holes by relying on the spiral force of the spiral groove.

[0015] Preferably, the helical grooves located within the rotor are distributed in a mirror-symmetrical manner with the center line of the rotor as the center of symmetry.

[0016] Through the above technical solution, the mirror-symmetrically distributed spiral grooves can use the spiral force of the spiral grooves from both ends of the rotor to spirally draw the surrounding air into the rotor grooves for cooling without the drive of other energy.

[0017] Preferably, when the groove of the rotor rotates to correspond with the groove of the stator, its pressure is at its minimum. At this time, external air is introduced into the generator for cooling through the fixed ventilation cavity and the moving ventilation cavity.

[0018] When the rotor teeth of the rotor rotate to correspond with the groove of the stator, the pressure is at its maximum. At this time, the internal air is discharged to the outside of the generator for heat dissipation through the fixed ventilation cavity and the dynamic ventilation cavity.

[0019] The above technical solution can achieve a breathing-like cooling effect and reduce air resistance caused by pressure, thus achieving a dual effect of balancing pressure and cooling.

[0020] The beneficial effects of this utility model are as follows:

[0021] By setting up a pressure balancing mechanism, not only can the pressure at the groove between the stator and rotor be balanced, reducing wind resistance, but the pressure balancing process during rotor rotation can also be used to achieve breathing-like cooling. Moreover, since it is located in the groove far away from the coil windings and rotor, it will not affect the magnetic flux between the coil windings and rotor teeth. Attached Figure Description

[0022] Figure 1 The prior art diagram shows a novel switched reluctance generator proposed in this utility model;

[0023] Figure 2 This is a cross-sectional view of the lamination of a novel switched reluctance generator proposed in this utility model;

[0024] Figure 3 A perspective view of the stator and rotor installation of a novel switched reluctance generator proposed in this utility model;

[0025] Figure 4 This is a front view of the stator and rotor installation of a novel switched reluctance generator proposed in this utility model.

[0026] In the diagram: 1. Stator; 11. Stator lamination; 12. Stator ventilation cavity; 2. Rotor; 21. Rotor lamination; 22. Dynamic ventilation cavity; 23. Ventilation hole; 24. Spiral groove; 3. Coil winding; 4. Rotor teeth. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] Reference Figure 2-4 A novel switched reluctance generator includes a stator 1 and a rotor 2 coaxially arranged with the stator 1.

[0029] The inner wall protrusion of the stator 1 is fixedly installed with a coil winding 3, and the outer surface of the rotor 2 is fixedly installed with rotor teeth 4.

[0030] The stator 1 is composed of multiple stator laminations 11 of the same type stacked together, and the rotor 2 is composed of multiple rotor laminations 21 of the same type.

[0031] In order to reduce the wind resistance caused by pressure during the rotation of the rotor 2 groove, a pressure balancing mechanism is provided inside the stator lamination 11 and the rotor lamination 21. When the rotor 2 rotates, the pressure balancing mechanism performs flow balancing on the pressure in the cavity between the stator 1 and the rotor 2.

[0032] The pressure balance is achieved as follows: the pressure balancing mechanism includes a fixed ventilation cavity 12 formed inside the stator lamination 11. The fixed ventilation cavity 12 is located in a cavity in the inner wall of the stator 1, and the inner wall of the fixed ventilation cavity 12 is funnel-shaped. The funnel-shaped fixed ventilation cavity 12 facilitates gas flow.

[0033] Furthermore, the pressure balancing mechanism also includes a dynamic ventilation cavity 22 formed inside the rotor lamination 21, which is located in a groove inside the rotor lamination 21. The location of the dynamic ventilation cavity 22 in the groove inside the rotor lamination 21 minimizes the negative impact on the magnetic flux.

[0034] To allow a small amount of air to enter, ventilation holes 23 are provided at the axis of the rotor lamination 21, arranged in a ring array along the rotor lamination 21. The inner wall of each ventilation hole 23 has a spiral groove 24. Multiple ventilation holes 23 are radially opened along the rotor lamination 21 and communicate with the inner wall of the spiral groove 24. The spiral force of the spiral groove 24 allows a small amount of cooling air to be drawn into the ventilation holes 23.

[0035] Furthermore, the spiral grooves 24 located within the rotor 2 are distributed in a mirror-symmetrical manner with the center line of the rotor 2 as the center of symmetry. The mirror-symmetrically distributed spiral grooves 24 can use the spiral force of the spiral grooves 24 from both ends of the rotor 2 to spirally draw surrounding air into the grooves of the rotor 2 for cooling without the drive of other energy.

[0036] In order to achieve the cooling effect, when the groove of the rotor 2 rotates to correspond with the groove of the stator 1, its pressure is at its minimum. At this time, the external air is introduced into the generator for cooling through the fixed ventilation cavity 12 and the moving ventilation cavity 22.

[0037] When the rotor teeth 4 of the rotor 2 rotate to correspond with the grooves of the stator 1, the pressure is at its maximum. At this time, the internal air is discharged to the outside of the generator through the fixed ventilation cavity 12 and the dynamic ventilation cavity 22 to dissipate heat. This achieves a breathing-like cooling effect and reduces air resistance caused by pressure, thus achieving a dual effect of balancing pressure and cooling.

[0038] By setting up a pressure balancing mechanism, not only can the pressure at the groove between the stator 1 and the rotor 2 be balanced, thus reducing wind resistance, but the pressure balancing process during the rotation of the rotor 2 can also be used to achieve breathing-like cooling. Moreover, since it is set away from the groove of the coil winding 3 and the rotor 2, it will not affect the magnetic flux between the coil winding 3 and the rotor teeth 4.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A novel switched reluctance generator, comprising a stator (1) and a rotor (2) coaxially disposed with respect to the stator (1); Its features are: The inner wall protrusion of the stator (1) is fixedly installed with a coil winding (3), and the outer surface of the rotor (2) is fixedly installed with rotor teeth (4). The stator (1) is composed of multiple stator laminations (11) of the same type stacked together, and the rotor (2) is composed of multiple rotor laminations (21) of the same type. The stator lamination (11) and the rotor lamination (21) are both equipped with pressure balancing mechanisms. When the rotor (2) rotates, the pressure balancing mechanism performs flow balancing on the pressure in the cavity between the stator (1) and the rotor (2).

2. The novel switched reluctance generator according to claim 1, characterized in that: The pressure balancing mechanism includes a fixed ventilation cavity (12) opened inside the stator lamination (11). The fixed ventilation cavity (12) is opened in the cavity of the inner wall of the stator (1), and the inner wall of the fixed ventilation cavity (12) is flared.

3. The novel switched reluctance generator according to claim 2, characterized in that: The pressure balancing mechanism also includes a dynamic ventilation cavity (22) formed inside the rotor lamination (21), the dynamic ventilation cavity (22) being formed in the internal groove of the rotor lamination (21).

4. The novel switched reluctance generator according to claim 3, characterized in that: Ventilation holes (23) are provided at the center of the rotor lamination (21) in a ring array. The inner wall of the ventilation holes (23) is provided with a spiral groove (24). The multiple ventilation holes (23) are opened radially along the rotor lamination (21) and communicate with the inner wall of the spiral groove (24).

5. The novel switched reluctance generator according to claim 4, characterized in that: The spiral grooves (24) located within the rotor (2) are distributed in a mirror-symmetric manner with the center line of the rotor (2) as the center of symmetry.

6. The novel switched reluctance generator according to claim 5, characterized in that: When the groove of the rotor (2) rotates to correspond with the groove of the stator (1), its pressure is at its minimum. At this time, external air is introduced into the generator for cooling through the fixed ventilation cavity (12) and the dynamic ventilation cavity (22). When the rotor teeth (4) of the rotor (2) rotate to correspond to the groove of the stator (1), the pressure is at its maximum. At this time, the internal air is discharged to the outside of the generator through the fixed ventilation cavity (12) and the dynamic ventilation cavity (22) to dissipate heat.

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