Rotor punching sheet, stator punching sheet and generator
By designing improvements in the rotor and stator punch of the synchronous generator, the problem of inefficiency of the existing generator is solved, and more efficient excitation coil heat dissipation and better installation structure are achieved, which improves the overall performance of the generator.
Patent Information
- Application Number
- CN202420912493.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-04-28
AI Technical Summary
The rotor and stator punching plate design of existing synchronous generators has problems of inefficiency, which affects the overall performance of the generator.
A rotor punching piece is designed, which provides partitions in each winding groove, divides the grooves into chambers with left and right symmetrical, and a ventilation groove is provided on the partitions to improve heat dissipation effect. Meanwhile, the stator punching design includes a circular outer contour, a stator inner bore and uniform cogging to optimize the efficiency of the generator.
Through the improved rotor and stator punching design, the overall performance of the generator is improved, including better excitation coil heat dissipation performance and better installation structure, ensuring efficient and stable operation of the generator.
Smart Images
Figure CN222638243U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of a two-pole AC synchronous generator, in particular to a rotor punching sheet, a stator punching sheet and a generator. Background Art
[0002] The operating principle of the synchronous generator is based on electromagnetic induction. It mainly consists of a stator and a rotor, in which the stator is fixed on the base, and the rotor is connected to the prime mover through a shaft and can rotate flexibly in the bearing. When direct current is passed through the rotor coil, a magnetic field is generated. When the rotor rotates under the action of external force, its magnetic field and the stator conductor move relative to each other, causing the stator conductor to cut the magnetic lines of force, thereby generating an induced electromotive force in the stator coil. This induced electromotive force causes current to flow, resulting in voltage and current.
[0003] The rotor laminations of the generator are generally made of silicon steel sheets. Generally, the lamination body with a circular outer contour is set, and winding grooves are set on the lamination body to form the rotor laminations. The rotor laminations are stacked and wound to form the rotor. The design of the rotor laminations has a great influence on the performance of the generator. For example, the rotor laminations are key components in the generator, and their materials, design dimensions, shape and structure have a direct impact on the efficiency of the generator. In order to improve the performance of the generator and other issues, our company has made targeted research and development improvements to the rotor laminations.
[0004] The stator laminations of the generator are generally made of silicon steel sheets. The outer contour of the lamination body is generally circular, and a number of tooth slots (stator winding slots) are arranged around the inner circumference of the lamination. The laminations are stacked and wound to form a stator. The laminations are key components in the generator, and the design of the stator laminations is also very important to the performance of the generator. Its material, inner circle size, outer circle size, slot size, number of slots, etc. have a direct impact on the efficiency of the generator. In order to improve the overall performance of the generator, based on the same technical concept, our company has also made targeted research and development improvements to the stator laminations. Utility Model Content
[0005] The purpose of the utility model is to propose a rotor punching sheet, a stator punching sheet and a generator, so as to further improve the overall performance of the generator.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] In the first aspect, the utility model provides a rotor punching sheet, including a punching sheet body, two winding grooves are symmetrically arranged on the punching sheet body, the winding grooves are opened outward, and a partition is arranged at the central axis of each of the winding grooves; the partition divides the winding groove into two left-right symmetrical chambers, the central axis of the partition coincides with the central axis of the winding groove, and is perpendicular to the symmetry axis between the two winding grooves; the partition is provided with a ventilation groove opening outward, the bottom of the ventilation groove is arc-shaped, and the opening is trumpet-shaped expanding outward; the spacing between the two winding grooves is 60-66mm.
[0008] On the basis of the above scheme and as a preferred scheme of the above scheme: an axial hole is arranged at the center of the punch body, and a notch is arranged on one side of the axial hole.
[0009] On the basis of the above scheme and as a preferred scheme of the above scheme: the outer contour of the punch body is divided into four parts by the symmetry axis between the two winding grooves and the central axis of the partition, wherein the four parts of the contour are respectively on a perfect circle and are not concentric; the radius of the four parts of the contour are all 64-65mm, wherein the center spacing on both sides of the central axis of the partition is 1.4-1.5mm, and the center spacing on both sides of the symmetry axis between the two winding grooves is 2mm.
[0010] On the basis of the above scheme and as a preferred scheme of the above scheme: two symmetrically arranged slots are also provided on the punching sheet body, the slots are open outward, the center axis of the slot is on the symmetry axis between the two winding grooves, and the bottom width of the slot is greater than the opening width of the slot; two through holes are symmetrically provided on the punching sheet body, and the center of the through hole is on the symmetry axis between the winding grooves.
[0011] On the basis of the above scheme and as a preferred scheme of the above scheme: the bottom of the chamber is parallel to the symmetry axis between the two winding grooves, both sides of the partition are perpendicular to the symmetry axis between the two winding grooves, a chamfer structure is arranged at the junction of the chamber bottom and the partition side, the side of the chamber away from the partition direction is a straight edge, the angle between the straight edge and the chamber bottom is an acute angle, a rounded structure is arranged at the junction of the straight edge and the chamber bottom, and convex portions protruding towards each other are arranged on the straight edge and the partition side at the chamber opening.
[0012] On the basis of the above scheme and as a preferred scheme of the above scheme: the two sides of the inner side of the ventilation slot form an angle of 10° with each other, and the opening of the ventilation slot is a rounded structure.
[0013] In the second aspect, based on the same technical concept of the utility model, a stator punching sheet is also provided for matching with the rotor punching sheet described above, including a punching sheet body 2, the outer contour of the punching sheet body 2 is circular as a whole, and the circumferential side diameter is 209.8-210.2mm, and the stator inner hole is arranged at the center of the punching sheet body 2, and the diameter is 129.8-130.2mm, and thirty-six tooth grooves are evenly arranged around the stator inner hole, and the center axis of the tooth groove is on the diameter of the stator inner hole, and the teeth are between adjacent tooth grooves, and the width of the tooth portion is 4.8-5.2mm, and boots protruding toward the tooth groove direction are arranged on both sides of the top of the tooth portion, and the part between the bottom of the tooth groove 203 and the circumferential side of the outer contour of the punching sheet body 2 is a groin, and the width of the groin is 22.4-25.6mm.
[0014] On the basis of the above scheme and as a preferred scheme of the above scheme: two symmetrical through holes are arranged on the punch body 2, and the through hole 2 is arranged on the side of the tooth slot away from the stator inner hole. The center of the through hole 2 is on the same diameter of the stator inner hole, and the diameter of the stator inner hole passing through the center of the through hole 2 is on the central axis of the tooth portion.
[0015] On the basis of the above scheme and as a preferred scheme of the above scheme: notches and a plurality of welding grooves are provided on two outer peripheral sides of the punching sheet body.
[0016] In a third aspect, based on the same technical concept of the utility model, a generator is also provided, comprising: a rotor formed by stacking a plurality of the rotor punching sheets mentioned above; a stator formed by stacking a plurality of the stator punching sheets mentioned above; the rotor is arranged inside the stator inner hole of the stator.
[0017] In order to further improve the overall performance of the generator, the utility model has the following beneficial effects:
[0018] Each winding slot used in the rotor punching of the utility model is used to set a set of excitation coils accordingly. Among them, the ventilation slots set in the rotor punching of the utility model make the center of each set of excitation coils of the rotor composed of the rotor punching have a heat dissipation slot extending along the length direction of the rotor. During operation, during the rotation of the rotor, the heat dissipation wind of the generator can also enter the heat dissipation slot (ventilation slot) to form a flowing cooling wind to cool the excitation coil. First, it avoids the influence of temperature increase on the resistance of the excitation coil, second, it reduces the risk of overheating of the excitation coil, and third, it reduces the copper loss of the coil. It ensures the efficient operation of the motor and further improves the overall performance of the generator.
[0019] On the other hand, the utility model further improves the overall performance of the generator by cooperating with the stator punching sheets of the utility model through improved stator punching sheets.
[0020] At the same time, the generator of the utility model further improves the overall performance of the generator by arranging the stator punching sheets and the rotor punching sheets of the utility model.
[0021] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a schematic diagram of the rotor punching structure of the utility model;
[0023] Figure 2 It is a schematic diagram of the center of the rotor punching of the utility model;
[0024] Figure 3 This is a schematic diagram of the stator punching structure of the utility model;
[0025] Figure 4 It is an enlarged view of part A of the stator punching sheet of the present utility model. DETAILED DESCRIPTION
[0026] The technical solutions in the embodiments of the present utility model are clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments.
[0027] See also Figure 1-4 The utility model discloses a rotor punching sheet 100, a stator punching sheet 200 and a generator, which can improve the working performance of the generator as a whole.
[0028] In the first aspect, in the embodiments of the present disclosure, Figure 1 As shown, the rotor punching sheet 100 includes a punching sheet body 101 with a thickness of 0.5 mm. Two winding grooves 102 are symmetrically arranged on the punching sheet body 101. The winding grooves 102 are used to set the excitation coils. The winding grooves 102 are opened outwards. A partition 103 is arranged at the central axis of each winding groove 102. The partition 103 is the middle support between each group of excitation coils. The partition 103 divides the winding groove 102 into two left-right symmetrical chambers 105. The central axis of the partition 103 coincides with the central axis of the winding groove 102 and is perpendicular to the symmetry axis between the two winding grooves 102. The distance between the two winding grooves 102 is the magnetic pole width, and the magnetic pole width is 60-66 mm.
[0029] The partition 103 is provided with a ventilation slot 104 with an opening facing outwards, and the ventilation slot 104 is used to ventilate and dissipate heat for the excitation coil. The bottom of the ventilation slot 104 is in an arc shape, and the opening is in an outwardly expanding trumpet shape, which is conducive to the passage of cooling air and increases the heat dissipation area, thereby achieving a better heat dissipation effect.
[0030] Furthermore, the two sides of the inner side of the ventilation slot form an angle of 10° with each other, and the opening of the ventilation slot 104 is a rounded structure 109 .
[0031] For example, the rotor punching 100 disclosed in patent No. 2011202403314 has a slot in the partition 103 for installation, and the inside of the coil is solid. However, each winding slot 102 used in the rotor punching 100 is used to set a set of excitation coils accordingly. Among them, the ventilation slots 104 set in the rotor punching 100 of the present invention make each set of excitation coils of the rotor composed of the rotor punching 100 have a heat dissipation slot extending along the length direction of the rotor. During operation, during the rotation of the rotor, the heat dissipation wind of the generator can also enter the heat dissipation slot (ventilation slot 104) to form a flowing cooling wind to cool the excitation coil. First, it avoids the influence of temperature increase on the resistance of the excitation coil, second, it reduces the risk of overheating of the excitation coil, and third, it reduces the copper loss of the coil. It is achieved to ensure the efficient and stable operation of the motor and further improve the overall performance of the generator.
[0032] In the disclosed embodiment, an axial hole 111 is provided at the center of the punch body 101, and a recess 112 is provided on one side of the axial hole 111. The axial hole 111 is used to install the generator shaft, and the purpose of the recess 112 is to exhaust and release pressure when the rotor punch 100 is installed on the shaft, so as to facilitate installation.
[0033] In the disclosed embodiment, two symmetrically arranged slots 113 are also provided on the punch body 101, and the slots 113 are used to set the magnetic steel. The slots 113 are open outward, the central axis of the slots 113 is on the symmetry axis between the two winding slots 102, and the slot bottom width of the slots 113 is greater than the opening width of the slots 113.
[0034] In the embodiment of the present disclosure, two through-holes 114 are symmetrically arranged on the sheet body 101 , and the through-holes 114 are used for installation and positioning to ensure the repeatability when multiple rotor sheets 100 are stacked and installed. The center of the through-hole 114 is on the symmetry axis between the winding slots 102 .
[0035] In the disclosed embodiment, to ensure the efficiency of the generator, the bottom 106 of the chamber 105 is parallel to the axis of symmetry between the two winding grooves 102, the spacing between the bottom 106 is the pole width of 60-66 mm, both sides of the partition 103 are perpendicular to the axis of symmetry between the two winding grooves 102, a chamfered structure 107 is provided at the junction of the bottom 106 and the side of the partition 103, the side of the chamber 105 away from the partition 103 is a straight edge 108, the angle between the straight edge 108 and the bottom 106 is an acute angle, and a rounded structure 109 is provided at the junction of the straight edge 108 and the bottom 106.
[0036] It is worth noting that at the opening of the chamber 105, convex portions 110 protruding towards each other are respectively provided on the straight edge 108 and the side of the partition 103. The design of the convex portion 110 has changed the previous excitation safety installation method. In the past, the excitation coil needed to be protected and fixed in a manner. However, after the convex portion 110 is provided, the insulating plate can be directly inserted into the opening of the chamber 105 to fix and protect the excitation coil, and the convex portion 110 is pressed on the side of the insulating plate to fix it.
[0037] In some embodiments, the outer contour of the punch body 101 is on a perfect circle.
[0038] In some embodiments, Figure 1 The outer contour of the punch body 101 is divided into four parts by the symmetry axis between the two winding grooves 102 and the central axis of the partition 103, wherein the contours of the four parts are respectively on a perfect circle and are not concentric. The radius of the contours of the four parts is 64-65mm, preferably 64.4mm. Figure 2 , wherein the center spacing of the partition 103 on both sides of the central axis is 1.4-1.5mm, and the optimal value is 1.5mm, and the center spacing of the two sides of the symmetry axis between the two winding slots 102 is 2mm. In this way, a non-uniform air gap can be formed between the rotor and the stator, thereby improving the waveform distortion rate of the generator output voltage.
[0039] In the second aspect, based on the same technical concept of the present utility model, in the embodiments of the present disclosure, as Figure 3-4 As shown, the stator punching sheet 200 is used to cooperate with the rotor punching sheet 100 described above. In order to optimize the design structure of the stator punching sheet 200, improve the efficiency of the generator, and improve the overall performance of the generator, the stator punching sheet 200 includes a punching sheet body 201 with a thickness of 0.5mm. The outer contour of the punching sheet body 201 is circular as a whole, the maximum contour diameter design size is 210mm, the processing accuracy requirement is 209.8-210.2mm, and the optimal diameter is 209.9-209.94mm. The stator inner hole 202 is set in the center of the punching sheet body 201, the design size is 130mm in diameter, the processing accuracy control diameter is 129.8-130.2mm, and the optimal diameter is 130.03-130.07mm.
[0040] 36 tooth slots 203 are evenly arranged around the stator inner hole 202, the central axis of the tooth slot 203 is on the diameter of the stator inner hole 202, the groove bottom diameter of the tooth slot 203 is 159mm, and there are teeth 204 between adjacent tooth slots 203, the width of the tooth portion 204 is 4.8-5.2mm, preferably 5mm, and the top two sides of the tooth portion 204 are provided with boots 205 protruding toward the tooth slot 203, and the interval between the boots 205 provided in each tooth slot 203 is 3.06mm. The part between the groove bottom of the tooth slot 203 and the circumferential side of the second outer contour of the punch body is the elbow portion 210, and the width of the elbow portion 210 is 22.4-25.6mm.
[0041] In some embodiments, four cutting edges 209 are evenly distributed on the outer circumference of the second punch body 201, and the distance between two opposite cutting edges 209 is 204 mm.
[0042] In the disclosed embodiment, two symmetrical second through-holes 206 are arranged on the second punch body 201, and the second through-hole 206 is arranged on the side of the tooth slot 203 away from the stator inner hole 202, and the center of the second through-hole 206 is on the same diameter of the stator inner hole 202, and the diameter of the stator inner hole 202 passing through the center of the second through-hole 206 is on the central axis of the tooth portion 204. The second through-hole 206 is used for repeated positioning and assembly during installation.
[0043] Furthermore, a notch 207 and a plurality of welding grooves 208 are provided on the outer peripheral side of the second punching sheet body 201, wherein the notch 207 is used for repeated positioning between adjacent stator punching sheets 200, and the welding grooves 208 are used for argon arc welding.
[0044] In the second aspect, based on the same technical concept of the utility model, in the disclosed embodiment, the generator includes a rotor formed by stacking a plurality of rotor punchings 100 described above and a stator formed by stacking a plurality of stator punchings 200 described above; the rotor is arranged inside the stator inner hole 202 of the stator. The working performance of the generator is optimized by improving the shape structure, size design and other aspects.
[0045] The excitation coil of the generator has good heat dissipation performance and an excellent rotor installation structure, the efficiency can be improved, the structure of the stator punching sheet 200 of the stator is optimized, the use efficiency can be guaranteed and improved, and the overall performance of the generator is improved.
[0046] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A rotor punching, characterized in that: It comprises a punching sheet body 1, on which two winding grooves are symmetrically arranged, the openings of the winding grooves are facing outwards, and a partition is arranged at the central axis of each of the winding grooves; The partition divides the winding groove into two bilaterally symmetrical chambers, the central axis of the partition coincides with the central axis of the winding groove, and is perpendicular to the symmetry axis between the two winding grooves; The partition is provided with a ventilation slot with an opening facing outwards, the slot bottom of the ventilation slot is in an arc shape, and the opening is in a trumpet shape expanding outwards; The distance between the two winding grooves is 60-66 mm.
2. The rotor punching according to claim 1, characterized in that: An axial hole is arranged at a center of the punch body, and a notch is arranged at one side of the axial hole.
3. The rotor punching according to claim 1, characterized in that: The outer contour of the punch body is divided into four parts by the symmetry axis between the two winding grooves and the center axis of the partition, wherein the contours of the four parts are respectively on a perfect circle and are not concentric; The radius of the four-part contour is 64-65 mm, wherein the center spacing on both sides of the central axis of the partition is 1.4-1.5 mm, and the center spacing on both sides of the symmetry axis between the two winding grooves is 2 mm.
4. The rotor punching according to claim 1, characterized in that: The punch body is also provided with two symmetrically arranged notches, the notches are open outward, the center axis of the notches is on the symmetry axis between the two winding grooves, and the bottom width of the notches is greater than the opening width of the notches; Two through holes 1 are symmetrically arranged on the punch body 1, and the centers of the through holes 1 are on the symmetry axis between the winding grooves.
5. The rotor punching according to claim 1, characterized in that: The bottom of the chamber is parallel to the symmetry axis between the two winding grooves, and both sides of the partition are perpendicular to the symmetry axis between the two winding grooves. A chamfered structure is arranged at the junction of the chamber bottom and the partition side. The side of the chamber away from the partition is a straight edge, and the angle between the straight edge and the chamber bottom is an acute angle. A rounded structure is arranged at the junction of the straight edge and the chamber bottom, and convex portions protruding toward each other are arranged at the chamber opening on the straight edge and the partition side respectively.
6. The rotor punching according to claim 1, characterized in that: The two sides of the inner side of the ventilation slot form an angle of 10° with each other, and the opening of the ventilation slot is a rounded structure.
7. A stator punching sheet, used to match the rotor punching sheet according to any one of claims 1 to 6, characterized in that: It comprises a punch body 2, the outer contour of the punch body 2 is circular as a whole, the diameter of the circumferential side is 209.8-210.2mm, a stator inner hole is arranged at the center of the punch body 2, the diameter is 129.8-130.2mm, thirty-six tooth slots are evenly arranged around the stator inner hole, the center axis of the tooth slot is on the diameter of the stator inner hole, the teeth are between adjacent tooth slots, the width of the teeth is 4.8-5.2mm, the top of the tooth is provided with boots protruding towards the tooth slot on both sides, the part between the bottom of the tooth slot (203) and the circumferential side of the outer contour of the punch body 2 is a groin, the width of the groin is 22.4-25.6mm.
8. The stator sheet according to claim 7, characterized in that: Two symmetrical through holes are arranged on the punch body 2, and the through holes are arranged on the side of the tooth slot away from the stator inner hole. The centers of the through holes are on the same diameter of the stator inner hole, and the diameter of the stator inner hole passing through the centers of the through holes is on the central axis of the tooth portion.
9. The stator sheet according to claim 7, characterized in that: The two outer peripheral sides of the punching sheet body are provided with notches and a plurality of welding grooves.
10. A generator, characterized in that: include: A rotor formed by laminating a plurality of rotor punchings according to any one of claims 1 to 6; A stator formed by stacking a plurality of stator punching sheets according to any one of claims 7 to 9; the rotor is arranged inside the stator inner hole of the stator.