A disc motor with adjustable stator-rotor air gap

Abstract

The present invention provides a disc motor with adjustable stator-rotor air gap applied to the field of disc motors, which includes a housing, end covers, and a stator disc. A main shaft is arranged between the end covers, and a rotor disc is arranged on the main shaft. The rotor disc is arranged between two groups of stator discs. Water channel bases are encapsulated by water channel cover plates on the sides of the two groups of end covers away from each other, and a first shaft seal plate and a second shaft seal plate for restricting the axial positions of both ends of the main shaft are respectively arranged on the two end covers; A plurality of permanent magnets are fixedly arranged on the rotor disc at equal angular intervals, and the adjacent permanent magnets have different magnetic polarities. The rotor disc is sleeved on the main shaft and is locked and fixed by a locking nut; A junction box is fixedly arranged on the outer circumference of the housing, and a through circular through hole is arranged in the junction box of the housing for observing the air gap between the rotor disc and the stator disc; The present application makes the adjustment of the stator-rotor air gap of the motor visual, reduces the assembly cost, has a market prospect, and is suitable for popularization and application.

Description

Technical Field

[0001] The present application relates to the field of disc motors, and particularly to a disc motor with adjustable stator-rotor air gap. Background Art

[0002] With the rapid advancement of global industrialization, the demand for miniaturization and flattening of motors has become increasingly strong. Against this background, disc motors are highly favored due to their short axial length, compact structure, high power density, high efficiency, etc., and are widely used in industries, aerospace, new energy power generation, electric vehicles and other fields.

[0003] There is a large axial magnetic pull force during the assembly process of the stator and rotor discs of the disc motor, which brings great difficulties to the entire assembly process.

[0004] During the assembly process of the stator and rotor discs of traditional disc motors, the air gap between the stator and rotor discs is invisible, and it is difficult to accurately control the air gap length. The unbalanced unilateral magnetic pull force on the rotor disc is likely to cause axial eccentricity of the rotor disc. At the same time, when correcting the dynamic balance of the rotor disc, repeated tests and adjustments are usually required, and the operation is very cumbersome and complex, which not only increases the assembly difficulty and cost, but also may affect the performance and stability of the motor.

[0005] Therefore, in order to solve the problem of adjusting the air gap size during the assembly process of the disc motor, improve the motor assembly efficiency, reduce costs and ensure the motor performance, a disc motor with adjustable stator-rotor air gap is proposed. Summary of the Invention

[0006] The purpose of the present application is to solve the problem of adjusting the air gap size during the assembly process of the disc motor, improve the motor assembly efficiency, reduce costs and ensure the motor performance. Compared with the prior art, a disc motor with adjustable stator-rotor air gap is provided, including a housing. Two groups of end covers are symmetrically assembled on both axial sides of the housing. On the opposite sides of the two groups of end covers, stator discs are assembled. A main shaft is rotatably connected between the two groups of end covers through a bearing structure. A rotor disc is coaxially fixed on the main shaft. The rotor disc is arranged between the two stator discs. On the opposite sides of the two groups of end covers, water channel bases are encapsulated through water channel covers. A first shaft seal plate and a second shaft seal plate for restricting the axial positions of both ends of the main shaft are respectively arranged on the two groups of end covers;

[0007] A number of permanent magnets are evenly fixed on the rotor disc at equal angles, and adjacent permanent magnets have different magnetic polarities. The rotor disc is sleeved on the main shaft and locked and fixed through a locking nut;

[0008] A junction box is fixed on the outer circumference of the housing. A circular through hole is provided in the junction box of the housing for observing the air gap between the rotor disc and the stator disc.

[0009] Further, two sets of symmetrically arranged sealing plates are fixed in the circular through hole. On one side of the two sets of sealing plates facing each other, there are rectangular holes, and the two long sides of both sides of the rectangular hole are arranged parallel to the end face of the stator disc;

[0010] A calibration mechanism is also arranged in the circular through hole. The calibration mechanism includes a rotating ring rotatably connected in the circular through hole through a threaded structure. A transparent scale plate is fixed in the rotating ring. Scale rulers are arranged on both sides of the transparent scale plate, and an observation groove is also arranged between the transparent scale plate and the rotating ring.

[0011] Further, the width of the transparent scale plate is greater than the width of the rectangular hole between the two sets of sealing plates, and the rotation angle of the transparent scale plate in the circular through hole is 0-90°.

[0012] Further, a convex lens is also fixed in the middle of the transparent scale plate, and an identification ring groove is also fixed on the outer circumference of the rotor disc.

[0013] Further, the calibration mechanism also includes four pairs of feedback plates facing each other in pairs. The bottom of the rotating ring extends into the interior of the machine shell and is fixed with two sets of mounting seats. Two sets of symmetrically arranged rotating shafts are fixed on each mounting seat. A baffle is fixed at the top of the rotating shaft on one side of the same mounting seat, and a baffle is fixed at the bottom of the rotating shaft on the other side of the same mounting seat. The baffles on the two sets of mounting seats are arranged in rotational symmetry.

[0014] Further, a magnetic block is built in at one end of the feedback plate away from the mounting seat. The two feedback plates on the same mounting seat have different magnetic polarities. The magnetic distributions of the feedback plates on the two sets of mounting seats are arranged in rotational symmetry. Elastic traction belts are arranged between the two feedback plates with the same magnetic polarity. An observation hole is arranged in the middle of the elastic traction belt. Rotating seats are fixed at both ends of the elastic traction belt. The rotating seats are rotatably connected to the corresponding feedback plates. The two elastic traction belts are separated up and down and arranged in a staggered manner.

[0015] Further, a spring piece is arranged on one side of the feedback plate away from the rotating seat, and the spring piece is clamped between the feedback plate and the baffle.

[0016] Further, the spring piece has an elastic force to drive the feedback plate away from the baffle, and the elastic traction belt has an elastic force to drive the two rotating seats closer to each other.

[0017] Further, when the feedback plate is in a free state, the observation holes on the two elastic traction belts are both coaxially arranged with the convex lens.

[0018] Further, when the transparent scale plate rotates to 0°, the side of the transparent scale plate is perpendicular to the straight edge of the sealing plate. When the transparent scale plate rotates to 90°, the side of the transparent scale plate is parallel to the straight edge of the sealing plate. At this time, the transparent scale plate blocks the rectangular hole between the two sealing plates, and the rotating ring and the circular through-hole are in a threaded locking state.

[0019] Compared with the prior art, the advantages of the present application are as follows:

[0020] Through the design of the circular through-hole with a calibration mechanism, the present application makes the adjustment of the air gap between the stator and rotor of the motor visible, solves the problem of adjusting the air gap size during the assembly process of the disc motor, improves the motor assembly efficiency, reduces the assembly cost, and ensures the motor assembly quality and motor performance by accurately adjusting the air gap between the stator and rotor. It has a market prospect and is suitable for popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present application;

[0022] Figure 2 is an exploded structural diagram of the present application;

[0023] Figure 3 is a schematic structural diagram of the circular through-hole proposed in the present application;

[0024] Figure 4 is a schematic structural diagram of the main shaft and the rotor disc proposed in the present application;

[0025] Figure 5 is Figure 4 an enlarged structural diagram of part A in

[0026] Figure 6 is a schematic internal structure diagram of the junction box proposed in the present application;

[0027] Figure 7 is Figure 6 an enlarged structural diagram of part B in

[0028] Figure 8 is a schematic sectional structure diagram of the present application;

[0029] Figure 9 is Figure 8 an enlarged structural diagram of part C in

[0030] Figure 10 is a perspective structural view of the calibration mechanism proposed in the present application;

[0031] Figure 11 is a schematic bottom structure diagram of the calibration mechanism proposed in the present application;

[0032] Figure 12For Figure 11 Schematic enlarged structure diagram of part D in

[0033] Figure 13 Schematic structure diagram of the mounting base proposed in the present application;

[0034] Figure 14 Schematic structure diagram of the feedback board proposed in the present application;

[0035] Figure 15 Schematic structure diagram when the magnetic steel coincides with the symmetry plane of the rotor disc in the present application;

[0036] Figure 16 Schematic diagram of the state when both ends of the elastic traction belt are subjected to uniform tension in the present application;

[0037] Figure 17 Schematic structure diagram when the magnetic steel does not coincide with the symmetry plane of the rotor disc in the present application;

[0038] Figure 18 Schematic diagram of the state when both ends of the elastic traction belt are subjected to non-uniform tension in the present application;

[0039] Figure 19 Schematic diagram of the state when observing the identification ring groove with a convex lens in the present application.

[0040] Explanation of the reference numerals in the figure:

[0041] 1. Machine housing; 11. Junction box; 12. Circular through hole; 121. Sealing plate; 2. End cover; 21. Water channel cover plate; 22. First shaft seal plate; 23. Second shaft seal plate; 3. Main shaft; 4. Rotor disc; 41. Magnetic steel; 42. Locking nut; 43. Identification ring groove; 5. Water channel base; 6. Stator disc; 7. Calibration mechanism; 701. Observation groove; 71. Rotating ring; 72. Transparent scale plate; 721. Scale ruler; 722. Convex lens; 73. Feedback board; 74. Rotating seat; 75. Elastic traction belt; 751. Observation hole; 76. Mounting base; 761. Baffle; 762. Rotating shaft; 77. Spring piece. Detailed implementation manners

[0042] The embodiments will clearly and completely describe the technical solutions of the present application in conjunction with the accompanying drawings of the specification. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present application.

[0043] Embodiment 1:

[0044] The present invention provides a disc motor with adjustable stator-rotor air gap. Please refer to Figure 1 - Figure 19, including a housing 1, two sets of end covers 2 are symmetrically assembled on both axial sides of the housing 1, stator discs 6 are assembled on one side of the two sets of end covers 2 facing each other, a main shaft 3 is rotationally connected between the two sets of end covers 2 through a bearing structure, a rotor disc 4 is coaxially fixed on the main shaft 3, the rotor disc 4 is arranged between the two sets of stator discs 6, water channel bases 5 are encapsulated on one side of the two sets of end covers 2 away from each other through water channel cover plates 21, and a first shaft seal plate 22 and a second shaft seal plate 23 for restricting the axial positions of both ends of the main shaft 3 are respectively arranged on the two sets of end covers 2;

[0045] A number of permanent magnets 41 are evenly fixed on the rotor disc 4 at equal angles, adjacent permanent magnets 41 have different magnetic polarities, and the rotor disc 4 is sleeved on the main shaft 3 and locked and fixed through a locking nut 42;

[0046] A junction box 11 is fixed on the circumferential outer side of the housing 1, and a through circular through hole 12 is arranged in the junction box 11 of the housing 1, and the circular through hole 12 is used to observe the air gap between the rotor disc 4 and the stator disc 6.

[0047] In this application, by arranging the circular through hole 12 on the housing 1, operators can directly observe the air gap situation between the rotor disc 4 and the stator disc 6, which facilitates the adjustment of the air gap length and reduces the trial-and-error rate during the correction of the dynamic balance of the rotor disc 4.

[0048] Furthermore, please refer to Figure 3 , two sets of symmetrically arranged sealing plates 121 are fixed in the circular through hole 12, a rectangular hole is arranged on one side of the two sets of sealing plates 121 facing each other, and the long sides on both sides of the rectangular hole are parallel to the end face of the stator disc 6; a calibration mechanism 7 is also arranged in the circular through hole 12, please refer to Figure 6 - Figure 9 , the calibration mechanism 7 includes a rotating ring 71 rotationally connected in the circular through hole 12 through a threaded structure, a transparent scale plate 72 is fixed in the rotating ring 71, scale rulers 721 are arranged on both sides of the transparent scale plate 72, and an observation groove 701 is also arranged between the transparent scale plate 72 and the rotating ring 71.

[0049] Operators can accurately read the air gap between the rotor disc 4 and the stator disc 6 through the scale rulers 721, thereby improving the accuracy of the correction of the rotor disc 4.

[0050] Please refer to Figure 3 and Figure 6 - Figure 7, to prevent the circular through-hole 12 from being in an open state during the use of the motor, the width of the transparent scale plate 72 is greater than the width of the rectangular hole between the two sets of sealing plates 121. The transparent scale plate 72 rotates within the circular through-hole 12 at an angle of 0 - 90°. When the transparent scale plate 72 rotates to 0°, the side of the transparent scale plate 72 is perpendicular to the straight edge of the sealing plate 121, so that the scale ruler 721 can accurately read the vertical distance between the rotor disk 4 and the stator disk 6, thereby reducing the reading error. It should be noted that the central axis of the circular through-hole 12 and the zero scale line of the scale ruler 721 both coincide with the symmetry plane of the machine housing 1. When the transparent scale plate 72 rotates to 90°, the side of the transparent scale plate 72 is parallel to the straight edge of the sealing plate 121. At this time, the transparent scale plate 72 blocks the rectangular hole between the two sets of sealing plates 121, and the rotating ring 71 is in a threaded locking state with the circular through-hole 12. Thus, the circular through-hole 12 is blocked by the transparent scale plate 72, so that the motor does not contact the outside during use, improving its internal sealing performance.

[0051] Please refer to Figure 9 , a convex lens 722 is also fixed in the middle of the transparent scale plate 72, and an identification ring groove 43 is also fixed on the outer circumference of the rotor disk 4. For easy observation, the identification ring groove 43 is coated with a distinct coating (such as a bright yellow coating). When adjusting the air gap of the rotor disk 4, the identification ring groove 43 on the rotor disk 4 can be observed through the convex lens 722. Further, an auxiliary straight line coinciding with the symmetry plane of the machine housing 1 and an auxiliary circle concentric with the circular through-hole 12 are provided on the convex lens 722.

[0052] Please refer to Figure 10 - Figure 14 , to further reduce the air gap adjustment error of the rotor disk 4, the calibration mechanism 7 further includes four pairs of feedback plates 73 that are opposite to each other in pairs. The bottom of the rotating ring 71 extends into the interior of the machine housing 1 and is fixed with two sets of mounting seats 76. Two sets of symmetrically arranged rotating shafts 762 are fixed on each mounting seat 76. A baffle 761 is fixed to the top of the rotating shaft 762 on one side of the same mounting seat 76, and a baffle 761 is fixed to the bottom of the rotating shaft 762 on the other side of the same mounting seat 76. The baffles 761 on the two sets of mounting seats 76 are arranged in rotational symmetry.

[0053] Among them, a magnetic block is built into the end of the feedback plate 73 away from the mounting seat 76. The two feedback plates 73 on the same mounting seat 76 have different magnetic polarities. The magnetic distribution of the feedback plates 73 on the two sets of mounting seats 76 is arranged in rotational symmetry. An elastic traction belt 75 is provided between the two feedback plates 73 with the same magnetic polarity. An observation hole 751 is provided in the middle of the elastic traction belt 75. Rotating seats 74 are fixed to both ends of the elastic traction belt 75. The rotating seats 74 are rotatably connected to the corresponding feedback plates 73. The two elastic traction belts 75 are separated up and down and arranged in a staggered manner.

[0054] Further, a spring piece 77 is provided on the side of the feedback plate 73 away from the rotating base 74. The spring piece 77 is clamped between the feedback plate 73 and the baffle 761. The spring piece 77 has an elastic force to drive the feedback plate 73 away from the baffle 761. The elastic traction belt 75 has an elastic force to drive the two rotating bases 74 closer to each other. In the free state of the feedback plate 73, the observation holes 751 on the two elastic traction belts 75 are coaxially arranged with the convex lens 722.

[0055] Please refer to Figure 15 - Figure 18 , in the specific use process, the scale ruler 721 on the transparent scale plate 72 can be used to roughly adjust the air gap of the rotor disk 4 in cooperation with the identification ring groove 43 on the rotor disk 4. Further, to avoid the assembly error of multiple sets of permanent magnets 41 on the rotor disk 4, that is, the symmetry plane of the permanent magnet 41 does not coincide with the symmetry plane of the rotor disk 4, resulting in the phenomenon that even when the identification ring groove 43 is aligned with the zero scale line on the scale ruler 721, the air gap distances between the permanent magnet 41 and the two stator disks 6 are still different. The feedback plate 73 can be used to further accurately detect the air gap.

[0056] Specifically, when the relative distances between the permanent magnet 41 on the rotor disk 4 and the two stator disks 6 are equal, and the magnetic suction or magnetic repulsion forces on both sides of the permanent magnet 41 acting on the feedback plate 73 are equal, the flipping angles of the feedback plate 73 on the same elastic traction belt 75 around the rotating shaft 762 are the same, that is, the elastic traction belt 75 is subjected to symmetric forces. Therefore, the observation holes 751 on the two elastic traction belts 75 remain in a coaxial state, and are observed in cooperation with the auxiliary circle on the convex lens 722. When the operator can observe the identification ring groove 43 through the convex lens 722 and the coincident observation holes 751, it indicates that the permanent magnet 41 here is accurately assembled.

[0057] The operator can rotate the main shaft 3 and the rotor disk 4 in the rough adjustment process at equal angles for rotation to detect each permanent magnet 41 one by one. When the relative distances between the permanent magnet 41 on the rotor disk 4 and the two stator disks 6 are not equal, and the magnetic suction or magnetic repulsion forces on both sides of the permanent magnet 41 acting on the feedback plate 73 are not equal, the flipping angles of the feedback plate 73 on the same elastic traction belt 75 around the rotating shaft 762 are different, that is, the elastic traction belt 75 is subjected to asymmetric forces. Therefore, the observation holes 751 on the two elastic traction belts 75 are in a non - coaxial state. Due to the interleaving phenomenon of the two observation holes 751, the operator cannot observe the identification ring groove 43 through the convex lens 722 and the interleaved observation holes 751, which indicates that the assembly of the permanent magnet 41 here is deviated, and the permanent magnet 41 here can be disassembled for adjustment.

[0058] Please refer to Figure 19, under the working conditions that require quick re-inspection, the operator quickly drives the main shaft 3 and the rotor disk 4 to rotate through the above method. The operator only needs to look directly at the convex lens 722. When the continuous identification ring groove 43 is observed in the convex lens 722, it means that the air gap adjustment between the stator and rotor of the motor is qualified.

[0059] Through the design of the circular through hole 12 with the calibration mechanism 7 in this application, the visualization of the air gap adjustment between the stator and rotor of the motor is realized, solving the problem of air gap size adjustment in the assembly process of the disc motor, improving the motor assembly efficiency, reducing the assembly cost, and ensuring the motor assembly quality and motor performance by accurately adjusting the air gap between the stator and rotor. It has a market prospect and is suitable for popularization and application.

[0060] The above is only the best implementation mode adopted by this application in combination with the current actual needs, but the protection scope of this application is not limited thereto.

Claims

1. A disc motor with adjustable stator-rotor air gap, comprising a housing (1), two groups of end covers (2) are symmetrically assembled on both axial sides of the housing (1), stator discs (6) are assembled on one side of each of the two groups of end covers (2) facing each other, a main shaft (3) is rotatably connected between the two groups of end covers (2) through a bearing structure, a rotor disc (4) is coaxially fixed on the main shaft (3), and the rotor disc (4) is arranged between the two stator discs (6), characterized in that, On the sides of the two end caps (2) away from each other, a water channel base (5) is encapsulated through a water channel cover plate (21). On the two end caps (2), a first shaft seal plate (22) and a second shaft seal plate (23) for restricting the axial positions of both ends of the main shaft (3) are respectively provided; on the rotor disc (4), a number of magnetic steel (41) are evenly fixed at equal angles, and adjacent magnetic steel (41) have different magnetic polarities. The rotor disc (4) is sleeved on the main shaft (3) and is locked and fixed through a locking nut (42); on the circumferential outer side of the housing (1), a junction box (11) is fixed. Inside the junction box (11) of the housing (1), there is a through circular through-hole (12), and the circular through-hole (12) is used to observe the air gap between the rotor disc (4) and the stator disc (6). Inside the circular through-hole (12), two groups of symmetrically arranged sealing plates (121) are fixed. On the opposite sides of the two groups of sealing plates (121), there are rectangular holes, and the long sides on both sides of the rectangular holes are parallel to the end face of the stator disc (6). Inside the circular through-hole (12), there is also a calibration mechanism (7). The calibration mechanism (7) includes a rotating ring (71) rotatably connected inside the circular through-hole (12) through a threaded structure. Inside the rotating ring (71), a transparent scale plate (72) is fixed. On both sides of the transparent scale plate (72), there are scale rulers (721). Between the transparent scale plate (72) and the rotating ring (71), there is also an observation slot (701). The calibration mechanism (7) further includes four pairs of feedback plates (73) opposite to each other. The bottom of the rotating ring (71) extends into the interior of the housing (1) and is fixed with two groups of mounting seats (76). On each mounting seat (76), two groups of symmetrically arranged rotating shafts (762) are fixed. On the top of the rotating shaft (762) on one side of the same mounting seat (76), a baffle (761) is fixed. On the bottom of the rotating shaft (762) on the other side of the same mounting seat (76), a baffle (761) is fixed. The baffles (761) on the two mounting seats (76) are arranged in rotational symmetry. At the end of the feedback plate (73) away from the mounting seat (76), a magnetic block is built in. The two feedback plates (73) on the same mounting seat (76) have different magnetic polarities. The magnetic distribution of the feedback plates (73) on the two mounting seats (76) is arranged in rotational symmetry. Between the two feedback plates (73) with the same magnetic polarity, an elastic traction belt (75) is provided. In the middle of the elastic traction belt (75), there is an observation hole (751). At both ends of the elastic traction belt (75), a rotating seat (74) is fixed. The rotating seat (74) is rotatably connected to the corresponding feedback plate (73). The two elastic traction belts (75) are separated up and down and arranged in a staggered manner. On the side of the feedback plate (73) away from the rotating seat (74), there is a spring piece (77), and the spring piece (77) is clamped between the feedback plate (73) and the baffle (761).

2. The disk motor with adjustable stator-rotor air gap according to claim 1, characterized in that, The width of the transparent scale plate (72) is greater than the width of the rectangular hole between the two sealing plates (121), and the rotation angle of the transparent scale plate (72) inside the circular through-hole (12) is 0 - 90°.

3. The disk motor with adjustable stator-rotor air gap according to claim 2, wherein, A convex lens (722) is also fixed in the middle of the transparent scale plate (72), and an identification ring groove (43) is also fixed on the outer circumference of the rotor disc (4).

4. A disc motor with adjustable stator-rotor air gap according to claim 1, characterized in that, The spring piece (77) has an elastic force that drives the feedback plate (73) away from the baffle plate (761), and the elastic traction belt (75) has an elastic force that drives the two sets of rotating seats (74) closer to each other.

5. A disc motor with adjustable stator-rotor air gap according to claim 4, characterized in that, When the feedback plate (73) is in a free state, the observation holes (751) on the two sets of elastic traction belts (75) are coaxially arranged with the convex lens (722).

6. The disk motor with adjustable stator-rotor air gap according to claim 1, wherein When the transparent scale plate (72) rotates to 0°, the side of the transparent scale plate (72) is perpendicular to the straight edge of the sealing plate (121). When the transparent scale plate (72) rotates to 90°, the side of the transparent scale plate (72) is parallel to the straight edge of the sealing plate (121). At this time, the transparent scale plate (72) seals the rectangular hole between the two sets of sealing plates (121), and the rotating ring (71) and the circular through hole (12) are in a thread-locked state.

Images