Fixing device for magnetic bearing displacement sensor of flywheel energy storage unit

Abstract

The utility model provides a fixing device for a magnetic bearing displacement sensor of a flywheel energy storage unit, which belongs to the technical field of flywheel energy storage, a plurality of silicon steel bulges are arranged on the inner ring of a silicon steel sheet, coils are correspondingly arranged on the silicon steel bulges, and the silicon steel sheet bulges and the coils are used for detecting the positions of a bearing in different directions; the coil is wound on the silicon steel sheet protrusions, the position of the bearing penetrating through the inner hole of the silicon steel sheet can be detected after the coil is powered on, and the bearing needs to be positioned in the X-axis direction, the Y-axis direction and the Z-axis direction, so that the silicon steel sheet protrusions on the silicon steel sheet comprise the silicon steel sheet protrusions for positioning the bearing in the X-axis direction, the Y-axis direction and the Z-axis direction, and the bearing is prevented from being separated from a suspension area. Through positioning of the sensor, the position precision of the bearing in the using process is higher, and the efficiency of a flywheel energy storage unit is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flywheel energy storage, in particular to a fixing device for a magnetic bearing displacement sensor of a flywheel energy storage unit. Background Art

[0002] Flywheel energy storage devices have the advantages of high stability, high efficiency, rapid charge and discharge response, strong environmental adaptability, high recycling rate, and no or low maintenance. They are gradually being used in industries such as energy storage, power supply, and energy replenishment. At present, flywheels are mainly supported by mechanical bearings. During actual operation, mechanical bearings will suffer from mechanical friction of the bearings, resulting in energy loss, affecting the charging and discharging efficiency of the entire machine. In order to reduce energy loss, magnetic bearings are used to reduce or eliminate the energy loss caused by mechanical friction. Magnetic bearings reduce friction while reducing lubrication, saving costs and improving the operating life and efficiency of the flywheel. However, the technical solution of using magnetic bearings is difficult in that it is difficult to position the high-speed rotating magnetic bearings. Once the bearings leave the magnetic suspension area, the charging and discharging efficiency of the flywheel energy storage unit will be reduced at best, and at worst, it will cause a safety accident.

[0003] Therefore, there is an urgent need for a method to monitor the position of the bearing at all times and respond in time if the bearing deviates from the predetermined position to prevent the bearing from leaving the magnetic suspension area, resulting in reduced charging and discharging efficiency of the flywheel energy storage device or causing major safety accidents. Utility Model Content

[0004] In view of this, the present invention proposes a device with a position sensor to detect the position of the bearing and prevent the bearing from leaving the magnetic suspension area.

[0005] The technical solution of the present utility model is implemented as follows: a fixing device for a magnetic bearing displacement sensor of a flywheel energy storage unit includes a stator base and a silicon steel sheet arranged on the stator base, wherein the inner ring of the silicon steel sheet is provided with a plurality of silicon steel sheet protrusions, and the silicon steel sheet protrusions are correspondingly provided with coils, and the silicon steel sheet protrusions and the coils are used to detect the position of the bearing in different directions.

[0006] On the basis of the above technical solution, preferably, the stator base includes a first ring and a first boss, the silicon steel sheet is arranged on the first ring, the first boss is arranged around the silicon steel sheet, and the first boss is arranged on the first ring.

[0007] On the basis of the above technical solution, preferably, it further includes a stator pressure ring and a pressure ring fixing plate, wherein the pressure ring fixing plate is fixedly connected to the stator pressure ring, the pressure ring fixing plate is fixedly arranged on the first boss, and the stator pressure ring presses the silicon steel sheet.

[0008] On the basis of the above technical solution, preferably, it further includes a PCB board, and the PCB board is electrically connected to the coil.

[0009] On the basis of the above technical solution, preferably, a mounting groove is provided on the stator pressure ring, and the PCB board is arranged in the mounting groove.

[0010] On the basis of the above technical solution, preferably, the stator base further includes a first wire groove and a second wire groove, the first wire groove is connected to the second wire groove, and the first wire groove is arranged around the first boss.

[0011] On the basis of the above technical solution, preferably, the stator base further includes an extended fixing area, the extended fixing area is arranged around the first wire slot, and the second wire slot is arranged on the extended fixing area.

[0012] On the basis of the above technical solution, preferably, a threading hole is provided in the second wire trough, the threading hole is connected to the second wire trough, and the threading hole extends from one side of the extended fixing area to the other side.

[0013] On the basis of the above technical solution, preferably, it further comprises a wire slot cover plate, wherein the wire slot cover plate covers the first wire slot, and the wire slot cover plate is arranged on the stator base.

[0014] On the basis of the above technical solution, preferably, the wire trough cover is provided with a wire guide trough, and the wire guide trough is provided in a one-to-one correspondence with the installation trough.

[0015] The fixing device of the magnetic bearing displacement sensor of the flywheel energy storage unit of the utility model has the following beneficial effects compared with the prior art:

[0016] The coil is wound around the protrusion of the silicon steel sheet. When the coil is energized, it will detect the position of the bearing passing through the inner hole of the silicon steel sheet. Since the bearing positioning requires positioning in the three directions of X, Y, and Z axes, the silicon steel sheet protrusions on the silicon steel sheet include silicon steel sheet protrusions for positioning in the three directions of X, Y, and Z axes to position the bearing and prevent the bearing from leaving the suspension area. The positioning accuracy of the above-mentioned sensor is higher, the structure is simple, and it is easy to implement;

[0017] The silicon steel sheet is placed in the first ring, and the first boss is arranged around the silicon steel sheet. The first ring and the first boss jointly position the silicon steel sheet, which improves the installation accuracy of the silicon steel sheet and the positioning accuracy of the suspended bearing, making the positioning of the bearing by the entire device more accurate and reliable.

[0018] In order to prevent the silicon steel sheet from moving or detaching from the first ring, the stator pressure ring is required to apply external pressure to the silicon steel sheet placed on the first ring. Therefore, a fixedly connected pressure ring fixing plate and the stator pressure ring are provided. The stator pressure ring is used to press the silicon steel sheet, and the pressure ring fixing plate fixes the stator pressure ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a three-dimensional diagram of a magnetic bearing displacement sensor for a flywheel energy storage unit according to the present invention;

[0021] Figure 2 This is a front view of a magnetic bearing displacement sensor for a flywheel energy storage unit according to the present invention;

[0022] Figure 3 This is a cross-sectional view of a magnetic bearing displacement sensor for a flywheel energy storage unit according to the present invention;

[0023] Figure 4 This is a three-dimensional diagram of the stator base of the utility model;

[0024] Figure 5 This is the front view of the PCB board of the utility model. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] like Figure 1-5 As shown, a fixing device for a magnetic bearing displacement sensor of a flywheel energy storage unit includes a stator base 1 and a silicon steel sheet 7 arranged on the stator base 1. The inner ring of the silicon steel sheet 7 is provided with a plurality of silicon steel sheet protrusions 71, and the silicon steel sheet protrusions 71 are correspondingly provided with coils 8. The silicon steel sheet protrusions 71 and the coils 8 are used to detect the position of the bearing in different directions. The coil 8 is wound around the silicon steel sheet protrusions 71. When the coil is energized, it will detect the position of the bearing passing through the inner hole of the silicon steel sheet 7. Since the bearing positioning requires positioning in the three directions of X, Y, and Z axes, as shown in FIG. Figure 4 The X and Y axis directions are marked, and the Z axis direction is perpendicular to the plane formed by the X and Y axis directions. Therefore, the silicon steel sheet protrusion 71 on the silicon steel sheet 7 includes silicon steel sheet protrusions 71 for positioning in the X, Y, and Z axis directions, positioning the bearing to prevent the bearing from leaving the suspension area. The positioning accuracy of the above-mentioned sensor is higher, the structure is simple, and it is easy to implement. The silicon steel sheet protrusion 71 and the silicon steel sheet 7 can be integrally processed or welded.

[0027] The stator base 1 includes a first ring 11 and a first boss 12. The silicon steel sheets 7 are arranged on the first ring 11. The first boss 12 is arranged around the silicon steel sheets 7. The first boss 12 is arranged on the first ring 11. The silicon steel sheets 7 are placed within the first ring 11. The first boss 12 is arranged around the silicon steel sheets 7. The first ring 11 and the first boss 12 jointly position the silicon steel sheets 7. This improves the installation accuracy of the silicon steel sheets 7 and the positioning accuracy of the suspended bearings, making the entire device more accurate and reliable in positioning the bearings.

[0028] The stator pressing ring 31 and the pressing ring fixing plate 32 are further included. The pressing ring fixing plate 32 is fixedly connected to the stator pressing ring 31. The pressing ring fixing plate 32 is fixedly arranged on the first boss 12. The stator pressing ring 31 presses the silicon steel sheet 7. In order to prevent the silicon steel sheet 7 from moving or detaching from the first ring 11 during use, the stator pressing ring 31 needs to apply external pressure to the silicon steel sheet 7 placed on the first ring 11. Therefore, a fixedly connected pressing ring fixing plate 32 and the stator pressing ring 31 are provided. The stator pressing ring 31 is used to press the silicon steel sheet 7, and the pressing ring fixing plate 32 fixes the stator pressing ring 31.

[0029] It also includes a PCB board 4, which is electrically connected to the coil 8. The PCB board 4 is electrically connected to the coil 8. According to the different currents in the PCB board 4, the direction of the current in the coil 8 is different, and the bearing positions measured by the silicon steel sheet protrusion 71 and the coil 8 are different, realizing position detection in the X, Y, and Z axis directions of the bearing.

[0030] The stator pressure ring 31 is provided with a mounting groove 311, and the PCB board 4 is arranged in the mounting groove 311. The PCB board 4 is fixed in the mounting groove 311 by screws or bonding, which reduces the weight of the stator pressure ring 31 and the overall volume of the stator pressure ring 31 and the PCB board 4, saves costs, reduces the volume of the entire equipment, facilitates disassembly and maintenance, and avoids direct contact between the high-speed rotating bearing or rotor and the PCB board 4, which may cause damage or failure of the PCB board due to mutual friction.

[0031] The stator base 1 also includes a first wire groove 13 and a second wire groove 14. The first wire groove 13 is connected to the second wire groove 14. The first wire groove 13 is arranged around the first boss 12. The first wire groove 13 and the second wire groove 14 are used for routing wires to prevent the wires from rubbing against the high-speed rotating rotor or bearings, resulting in short circuit or short circuit.

[0032] The stator base 1 also includes an extended fixing area 15, which is arranged around the first wire slot 13. The second wire slot 14 is provided on the extended fixing area 15. The extended fixing area 15 is used to fix the entire stator base 1. The extended fixing area 15 can be a ring or a portion of a ring, and any part thereof that can provide a fixing function is within the scope of protection of this patent.

[0033] A threading hole 141 is provided in the second wire groove 14 , and the threading hole 141 is connected to the second wire groove 14 . The threading hole 141 extends from one side of the extended fixed area 15 to the other side. The threading hole 141 is used to lead the wire on one side of the extended fixed area 15 to the other side of the extended fixed area 15 .

[0034] The stator further includes a wire slot cover 5, which covers the first wire slot 13 and is disposed on the stator base 1. The wire slot cover 5 protects the wires in the first wire slot 13, preventing the wires from rubbing against the high-speed rotating rotor or bearings, which could cause short circuits or short circuits.

[0035] The wire trough cover 5 is provided with a lead trough 51 , which is arranged in a one-to-one correspondence with the mounting slot 311 . The lead trough 51 guides the line of the PCB board 4 installed in the mounting slot 311 into the first wire trough 13 covered by the wire trough cover 5 .

[0036] The PCB board 4 includes a first sensor PCB board 41 and a second sensor PCB board 42, which correspond to the position distribution of the sensor detection probes respectively. The PCB board 4 has a winding coil pad 411 and an external contact electric welding four-core shielded wire 412. The first sensor PCB board 41 is divided into two groups to respectively detect the displacement signals of the bearing's X and Y axis degrees of freedom. Each group is symmetrically distributed and has two external contact points. The external welding points of the second sensor PCB board 42 are connected in series to form a path for n second sensor PCB boards 42.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fixing device for a magnetic bearing displacement sensor of a flywheel energy storage unit, comprising a stator base (1) and a silicon steel sheet (7) arranged on the stator base (1), characterized in that: The inner ring of the silicon steel sheet (7) is provided with a plurality of silicon steel sheet protrusions (71), and the silicon steel sheet protrusions (71) are correspondingly provided with coils (8). The silicon steel sheet protrusions (71) and the coils (8) are used to detect the position of the bearing in different directions.

2. A fixing device for a magnetic bearing displacement sensor of a flywheel energy storage unit according to claim 1, characterized in that: The stator base (1) comprises a first ring (11) and a first boss (12); the silicon steel sheet (7) is arranged on the first ring (11); the first boss (12) is arranged around the silicon steel sheet (7); and the first boss (12) is arranged on the first ring (11).

3. A fixing device for a magnetic bearing displacement sensor of a flywheel energy storage unit according to claim 2, characterized in that: It also includes a stator pressing ring (31) and a pressing ring fixing plate (32), wherein the pressing ring fixing plate (32) is fixedly connected to the stator pressing ring (31), and the pressing ring fixing plate (32) is fixedly arranged on the first boss (12), and the stator pressing ring (31) presses the silicon steel sheet (7).

4. A fixing device for a magnetic bearing displacement sensor of a flywheel energy storage unit according to claim 3, characterized in that: It also includes a PCB board (4), and the PCB board (4) is electrically connected to the coil (8).

5. The fixing device for the magnetic bearing displacement sensor of a flywheel energy storage unit according to claim 4, characterized in that: The stator pressing ring (31) is provided with a mounting groove (311), and the PCB board (4) is arranged in the mounting groove (311).

6. The fixing device for a magnetic bearing displacement sensor of a flywheel energy storage unit according to claim 5, characterized in that: The stator base (1) further comprises a first wire groove (13) and a second wire groove (14), wherein the first wire groove (13) is connected to the second wire groove (14), and the first wire groove (13) is arranged around the first boss (12).

7. The fixing device for a magnetic bearing displacement sensor of a flywheel energy storage unit according to claim 6, characterized in that: The stator base (1) further comprises an extended fixing area (15), wherein the extended fixing area (15) is arranged around the first wire slot (13), and the second wire slot (14) is arranged on the extended fixing area (15).

8. The fixing device for a magnetic bearing displacement sensor of a flywheel energy storage unit according to claim 6, characterized in that: A threading hole (141) is provided in the second wire groove (14), the threading hole (141) is connected to the second wire groove (14), and the threading hole (141) extends from one side of the extended fixing area (15) to the other side.

9. The fixing device for a magnetic bearing displacement sensor of a flywheel energy storage unit according to claim 6, characterized in that: It also includes a wire slot cover plate (5), wherein the wire slot cover plate (5) covers the first wire slot (13), and the wire slot cover plate (5) is arranged on the stator base (1).

10. The fixing device for a magnetic bearing displacement sensor of a flywheel energy storage unit according to claim 9, characterized in that: The wire trough cover plate (5) is provided with a wire guide trough (51), and the wire guide trough (51) is provided in a one-to-one correspondence with the mounting trough (311).

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