Disc type motor with adjustable air gap between stator and rotor

Abstract

The invention provides a disc type motor with adjustable stator and rotor air gaps, which is applied to the field of disc type motors, and comprises a shell, end covers and stator discs, a main shaft is arranged between the end covers, a rotor disc is arranged on the main shaft, the rotor disc is arranged between the two groups of stator discs, and water channel bases are packaged on one sides, far away from each other, of the two groups of end covers through water channel cover plates; a first shaft sealing plate and a second shaft sealing plate for limiting the axial positions of the two ends of the main shaft are respectively arranged on the two groups of end covers; a plurality of magnetic steels are uniformly fixed on the rotor disc at equal angles, the adjacent magnetic steels are different in magnetism, and the rotor disc sleeves the main shaft and is locked and fixed through a locking nut; a junction box is fixed on the outer side of the circumference of the machine shell, a through circular through hole is formed in the junction box of the machine shell, and the circular through hole is used for observing an air gap between the rotor disc and the stator disc. The stator and rotor air gap adjustment of the motor is visualized, the assembly cost is reduced, and the motor has market prospects and is suitable for popularization and application.

Description

Technical Field

[0001] The present application relates to the field of disc motors, and in particular to a disc motor with adjustable stator and 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. In this context, disc motors are favored due to their short axial length, compact structure, high power density and high efficiency, and are widely used in industries such as industry, aerospace, new energy power generation and electric vehicles.

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

[0004] In the assembly process of the stator and rotor discs of traditional disc motors, the air gap between the stator and rotor discs is not visible, and the air gap length is difficult to accurately control. The unbalanced unilateral magnetic pull on the rotor disc can easily cause the rotor disc to be axially eccentric. 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 complicated, which not only increases the difficulty and cost of assembly, but may also affect the performance and stability of the motor.

[0005] Therefore, in order to solve the problem of air gap adjustment during the assembly of a disc motor, improve motor assembly efficiency, reduce costs and ensure motor performance, a disc motor with adjustable stator and 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 of a 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 casing, two groups of end covers are symmetrically mounted on both axial sides of the casing, and the opposite sides of the two groups of end covers are both mounted with stator disks, a main shaft is rotatably connected between the two groups of end covers through a bearing structure, a rotor disk is coaxially fixed on the main shaft, and the rotor disk is arranged between the two groups of stator disks, and the two groups of end covers are both sealed with a waterway base through a waterway cover plate on the sides away from each other, and the two groups of end covers are respectively provided with a first shaft sealing plate and a second shaft sealing plate for limiting the axial position of the two ends of the main shaft; A plurality of magnets are fixed on the rotor disk at equal angles, and adjacent magnets have different magnetic properties. The rotor disk is sleeved on the main shaft and is locked and fixed by a locking nut; A junction box is fixed on the outer circumference of the casing, and a circular through hole is provided in the junction box of the casing. The circular through hole is used to observe the air gap between the rotor disk and the stator disk.

[0007] Furthermore, two groups of symmetrically arranged sealing plates are fixed in the circular through hole, and rectangular holes are arranged on opposite sides of the two groups of sealing plates, and the long sides of the two sides of the rectangular holes are arranged parallel to the end surface of the stator disk; A calibration mechanism is also provided in the circular through hole, and the calibration mechanism includes a rotating ring rotatably connected to the circular through hole through a threaded structure, a transparent scale plate is fixed in the rotating ring, scale rulers are provided on both sides of the transparent scale plate, and an observation groove is also provided between the transparent scale plate and the rotating ring.

[0008] Furthermore, 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°. Furthermore, a convex lens is fixed to the middle of the transparent scale plate, and an identification ring groove is fixed to the outer circumference of the rotor disk.

[0009] Furthermore, the calibration mechanism also includes four feedback plates opposite to each other, the bottom of the rotating ring extends to the interior of the casing and is fixed with two groups of mounting seats, two groups of symmetrically arranged rotating shafts are fixed on the mounting seats, a baffle is fixed on the top of the rotating shaft on one side of the same mounting seat, and a baffle is fixed on the bottom of the rotating shaft on the other side of the same mounting seat, and the baffles on the two groups of mounting seats are arranged in rotational symmetry.

[0010] Furthermore, a magnetic block is built into one end of the feedback plate away from the mounting seat, and the two groups of feedback plates on the same mounting seat have different magnetic properties. The magnetic distribution of the feedback plates on the two groups of mounting seats is rotationally symmetrical, and an elastic traction belt is provided between the two groups of feedback plates with the same magnetic properties. An observation hole is provided in the middle of the elastic traction belt, and rotating seats are fixed at both ends of the elastic traction belt. The rotating seats are rotatably connected to the corresponding feedback plates, and the two groups of elastic traction belts are separated up and down and staggered.

[0011] Furthermore, a spring sheet is provided on a side of the feedback plate away from the rotating seat, and the spring sheet is clamped between the feedback plate and the baffle.

[0012] Furthermore, the spring sheet has an elastic force that drives the feedback plate away from the baffle, and the elastic traction belt has an elastic force that drives the two groups of rotating seats closer together.

[0013] Furthermore, when the feedback plate is in a free state, the observation holes on the two groups of elastic traction belts are coaxially arranged with the convex lens.

[0014] Furthermore, when the transparent scale plate is rotated to 0°, the side of the transparent scale plate is perpendicular to the straight edge of the sealing plate, and when the transparent scale plate is rotated 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 groups of sealing plates, and the rotating ring and the circular through hole are in a threaded locking state.

[0015] Compared with the prior art, the advantages of this application are: The present application uses a circular through-hole design with a calibration mechanism to visualize the stator and rotor air gap adjustment of the motor, solves the problem of air gap size adjustment during the assembly process of the disc motor, improves the motor assembly efficiency, reduces assembly costs, and ensures the motor assembly quality and motor performance by accurately adjusting the stator and rotor air gap. The application has market prospects and is suitable for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of this application; Figure 2 This is a schematic diagram of the explosion structure of this application; Figure 3 It is a schematic diagram of the structure of the circular through hole proposed in this application; Figure 4 It is a schematic diagram of the structure of the main shaft and the rotor disk proposed in this application; Figure 5 for Figure 4 The enlarged structural diagram of the middle A part; Figure 6 A schematic diagram of the internal structure of the junction box proposed in this application; Figure 7 for Figure 6 A schematic diagram of the enlarged structure of the middle B part; Figure 8 It is a schematic diagram of the cross-sectional structure of this application; Fig. 9 for Figure 8 The enlarged structural diagram of the middle C part; Fig.10 is a structural perspective view of the calibration mechanism proposed in this application; Fig.11 A schematic diagram of the bottom structure of the calibration mechanism proposed in this application; Fig.12 for Fig.11 The enlarged structural diagram of the middle D part; Fig.13 It is a schematic diagram of the structure of the mounting base proposed in this application; Fig.14 It is a structural schematic diagram of the feedback board proposed in this application; Fig.15This is a schematic diagram of the structure when the magnetic steel proposed in this application coincides with the symmetry plane of the rotor disk; Fig.16 This is a schematic diagram of the state when both ends of the elastic traction belt proposed in this application are subjected to uniform tension; Fig.17 This is a schematic diagram of the structure when the symmetry planes of the magnetic steel and the rotor disk proposed in this application do not overlap; Fig.18 It is a schematic diagram of the state when the two ends of the elastic traction belt proposed in this application are subjected to uneven tension; Fig.19 This is a schematic diagram of the state when the convex lens proposed in this application observes the identification ring groove.

[0017] Description of the numbers in the figure: 1. Casing; 11. Junction box; 12. Circular through hole; 121. Sealing plate; 2. End cover; 21. Water channel cover plate; 22. First shaft sealing plate; 23. Second shaft sealing plate; 3. Main shaft; 4. Rotor disk; 41. Magnetic steel; 42. Locking nut; 43. Identification ring groove; 5. Water channel base; 6. Stator disk; 7. Calibration mechanism; 701. Observation slot; 71. Rotating ring; 72. Transparent scale plate; 721. Scale ruler; 722. Convex lens; 73. Feedback plate; 74. Rotating seat; 75. Elastic traction belt; 751. Observation hole; 76. Mounting seat; 761. Baffle; 762. Rotating shaft; 77. Spring sheet. DETAILED DESCRIPTION

[0018] The embodiments will be combined with the drawings in the specification to provide a clear and complete description of the technical solution of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making any creative work shall fall within the scope of protection of the present application.

[0019] Embodiment 1: The present invention provides a disc-type motor with adjustable stator-rotor air gap, see Figure 1 - Fig.19 , comprising a casing 1, two sets of end covers 2 are symmetrically mounted on both axial sides of the casing 1, stator discs 6 are mounted on opposite sides of the two sets of end covers 2, a main shaft 3 is rotatably 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, a waterway base 5 is encapsulated by a waterway cover plate 21 on the side away from the two sets of end covers 2, and a first shaft sealing plate 22 and a second shaft sealing plate 23 for limiting the axial position of the two ends of the main shaft 3 are respectively provided on the two sets of end covers 2; A plurality of magnets 41 are fixed on the rotor disk 4 at equal angles, and adjacent magnets 41 have different magnetic properties. The rotor disk 4 is sleeved on the main shaft 3 and is locked and fixed by a locking nut 42; A junction box 11 is fixed to the outer circumference of the casing 1 . A circular through hole 12 is provided in the junction box 11 of the casing 1 . The circular through hole 12 is used to observe the air gap between the rotor disk 4 and the stator disk 6 .

[0020] The present application provides a circular through hole 12 on the casing 1 so that the operator can visually observe the air gap between the rotor disk 4 and the stator disk 6 , thereby facilitating the adjustment of the air gap length and reducing the trial and error rate when correcting the dynamic balance of the rotor disk 4 .

[0021] For further information, see Figure 3 Two sets of symmetrically arranged sealing plates 121 are fixed in the circular through hole 12. Rectangular holes are arranged on opposite sides of the two sets of sealing plates 121. The long sides of the two sides of the rectangular holes are arranged parallel to the end surface of the stator disk 6. A calibration mechanism 7 is also arranged in the circular through hole 12. Please refer to Figure 6 - Fig. 9 The calibration mechanism 7 includes a rotating ring 71 rotatably connected to 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 provided on both sides of the transparent scale plate 72, and an observation groove 701 is also provided between the transparent scale plate 72 and the rotating ring 71.

[0022] The operator can use the scale ruler 721 to accurately read the air gap between the rotor disk 4 and the stator disk 6 , thereby improving the accuracy of the correction of the rotor disk 4 .

[0023] See also Figure 3 and Figure 6 - Figure 7 In order 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 center 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 housing 1. When the transparent scale plate 72 is rotated 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 and the circular through hole 12 are in a threaded locking state, and then the transparent scale plate 72 is used to block the circular through hole 12, so that the motor does not contact the outside world during use, thereby improving its internal sealing performance. See also Fig. 9A convex lens 722 is also fixed to the middle of the transparent scale plate 72, and an identification ring groove 43 is also fixed to the outer circumferential side of the rotor disk 4. For easy observation, the identification ring groove 43 is coated with a bright paint (such as bright yellow paint). When the air gap of the rotor disk 4 is adjusted, the identification ring groove 43 on the rotor disk 4 can be observed through the convex lens 722. Furthermore, the convex lens 722 is provided with an auxiliary straight line coinciding with the symmetry plane of the casing 1 and an auxiliary circle concentric with the circular through hole 12.

[0024] See also Fig.10 - Fig.14 In order to further reduce the air gap adjustment error of the rotor disk 4, the calibration mechanism 7 also includes four feedback plates 73 opposite to each other. The bottom of the rotating ring 71 extends to the inside of the casing 1 and is fixed with two groups of mounting seats 76. Two groups of symmetrically arranged rotating shafts 762 are fixed on the mounting seats 76. A baffle 761 is fixed on the top of the rotating shaft 762 on one side of the same mounting seat 76, and a baffle 761 is fixed on the bottom of the rotating shaft 762 on the other side of the same mounting seat 76. The baffles 761 on the two groups of mounting seats 76 are arranged in rotational symmetry.

[0025] Among them, a magnetic block is built into one end of the feedback plate 73 away from the mounting seat 76, and the two groups of feedback plates 73 on the same mounting seat 76 have different magnetic properties. The magnetic distribution of the feedback plates 73 on the two groups of mounting seats 76 is rotationally symmetrical. An elastic traction belt 75 is provided between the two groups of feedback plates 73 with the same magnetic properties, and an observation hole 751 is provided in the middle of the elastic traction belt 75. Rotating seats 74 are fixed at both ends of the elastic traction belt 75, and the rotating seat 74 is rotatably connected to the corresponding feedback plate 73. The two groups of elastic traction belts 75 are separated up and down and are staggered.

[0026] Furthermore, a spring sheet 77 is provided on the side of the feedback plate 73 away from the rotating seat 74. The spring sheet 77 is clamped between the feedback plate 73 and the baffle 761. The spring sheet 77 has an elastic force that drives the feedback plate 73 away from the baffle 761. The elastic traction belt 75 has an elastic force that drives the two groups of rotating seats 74 closer together. When the feedback plate 73 is in a free state, the observation holes 751 on the two groups of elastic traction belts 75 are both coaxially arranged with the convex lens 722.

[0027] See also Fig.15 - Fig.18 In the specific use process, the air gap of the rotor disk 4 can be roughly adjusted by using the scale scale 721 on the transparent scale plate 72 in conjunction with the identification ring groove 43 on the rotor disk 4. Furthermore, in order to avoid the assembly error of the multiple groups of magnetic steels 41 on the rotor disk 4, that is, the symmetric plane of the magnetic steel 41 does not coincide with the symmetric plane of the rotor disk 4, so that even if the identification ring groove 43 is aligned with the zero scale line on the scale scale 721, the air gap spacing between the magnetic steel 41 and the two groups of stator disks 6 is still different, the feedback plate 73 can be used to perform further accurate detection of the air gap; Specifically, when the relative spacing between the magnet 41 on the rotor disk 4 and the two groups of stator disks 6 is equal, and the magnetic attraction or repulsion of the magnet 41 on the feedback plates 73 on both sides of the magnet 41 is equal, the flip angles of the feedback plates 73 on the same elastic traction belt 75 around the rotation axis 762 are the same, that is, the elastic traction belt 75 is subjected to symmetrical forces, so the observation holes 751 on the two groups of elastic traction belts 75 remain in a coaxial state, and observation is performed in conjunction 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 through the overlapping observation holes 751, it indicates that the magnet 41 here is assembled accurately; The operator can rotate the main shaft 3 and the rotor disk 4 in the coarse adjustment process at equal angles to detect the magnets 41 one by one. When the relative spacing between the magnets 41 on the rotor disk 4 and the two groups of stator disks 6 is not equal, the feedback plates 73 on both sides of the magnets 41 are subjected to unequal magnetic attraction or repulsion by the magnets 41. The flipping angles of the feedback plates 73 on the same elastic traction belt 75 around the rotation axis 762 are different, that is, the elastic traction belt 75 is subjected to asymmetric forces. Therefore, the observation holes 751 on the two groups of elastic traction belts 75 are in a non-coaxial state. Due to the staggered phenomenon of the two groups of observation holes 751, the operator cannot observe the identification ring groove 43 through the convex lens 722 and the staggered observation holes 751, which indicates that the assembly of the magnets 41 here is deviated, and the magnets 41 here can be disassembled for adjustment.

[0028] See also Fig.19 Under the working condition that requires rapid re-inspection, the operator can quickly drive 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 a continuous identification ring groove 43 is observed in the convex lens 722, it means that the stator and rotor air gap adjustment of the motor is qualified.

[0029] The present application visualizes the adjustment of the stator and rotor air gap of the motor through the design of a circular through hole 12 with a calibration mechanism 7, solves the problem of air gap size adjustment 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 stator and rotor air gap. The application has market prospects and is suitable for promotion and application.

[0030] The above is only the best implementation method adopted by this application in combination with current actual needs, but the protection scope of this application is not limited to this.

Claims

1. A disc-type motor with adjustable stator-rotor air gap, comprising a housing (1), two sets of end covers (2) symmetrically mounted on both axial sides of the housing (1), stator discs (6) mounted on opposite sides of the two sets of end covers (2), a main shaft (3) rotatably connected between the two sets of end covers (2) via a bearing structure, a rotor disc (4) coaxially fixed on the main shaft (3), and the rotor disc (4) disposed between the two sets of stator discs (6), characterized in that: The two sets of end covers (2) have a waterway base (5) encapsulated by a waterway cover plate (21) on the side away from each other, and the two sets of end covers (2) are respectively provided with a first shaft sealing plate (22) and a second shaft sealing plate (23) for limiting the axial position of the two ends of the main shaft (3); A plurality of magnets (41) are fixed at equal angles on the rotor disk (4), and adjacent magnets (41) have different magnetic properties. The rotor disk (4) is sleeved on the main shaft (3) and is locked and fixed by a locking nut (42); A terminal box (11) is fixed to the outer circumferential side of the housing (1), and a circular through hole (12) is provided in the terminal box (11) of the housing (1), wherein the circular through hole (12) is used to observe the air gap between the rotor disk (4) and the stator disk (6).

2. A disc-type motor with adjustable stator-rotor air gap according to claim 1, characterized in that: Two groups of symmetrically arranged sealing plates (121) are fixed in the circular through hole (12), and rectangular holes are provided on opposite sides of the two groups of sealing plates (121), and the long sides of the two sides of the rectangular holes are arranged parallel to the end surface of the stator disk (6); A calibration mechanism (7) is also provided in the circular through hole (12), the calibration mechanism (7) comprising a rotating ring (71) rotatably connected to the circular through hole (12) via a threaded structure, a transparent scale plate (72) being fixed in the rotating ring (71), scale scales (721) being provided on both sides of the transparent scale plate (72), and an observation slot (701) being provided between the transparent scale plate (72) and the rotating ring (71).

3. A disc-type motor with adjustable stator-rotor air gap according to claim 2, characterized in that: 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), and the transparent scale plate (72) rotates within the circular through hole (12) at an angle of 0-90°.

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

5. The disc-type motor with adjustable stator-rotor air gap according to claim 4, characterized in that: The calibration mechanism (7) further comprises four feedback plates (73) which are opposed to each other in pairs. The bottom of the rotating ring (71) extends to the interior of the housing (1) and is fixed with two groups of mounting seats (76). Two groups of symmetrically arranged rotating shafts (762) are fixed on each of the mounting seats (76). A baffle (761) is fixed on the top of the rotating shaft (762) on one side of the same mounting seat (76), and a baffle (761) is fixed on the bottom of the rotating shaft (762) on the other side of the same mounting seat (76). The baffles (761) on the two groups of mounting seats (76) are arranged in rotational symmetry.

6. The disc-type motor with adjustable stator-rotor air gap according to claim 5, characterized in that: A magnetic block is built into one end of the feedback plate (73) away from the mounting seat (76); the two groups of feedback plates (73) on the same mounting seat (76) have different magnetic properties; the magnetic distribution of the feedback plates (73) on the two groups of mounting seats (76) is arranged in rotational symmetry; an elastic traction belt (75) is provided between the two groups of feedback plates (73) with the same magnetic properties; an observation hole (751) is provided in the middle of the elastic traction belt (75); rotating seats (74) are fixed at both ends of the elastic traction belt (75); the rotating seats (74) are rotatably connected to the corresponding feedback plates (73); and the two groups of elastic traction belts (75) are separated from each other and arranged alternately.

7. The disc-type motor with adjustable stator-rotor air gap according to claim 6, characterized in that: A spring sheet (77) is provided on one side of the feedback plate (73) away from the rotating seat (74), and the spring sheet (77) is clamped between the feedback plate (73) and the baffle (761).

8. The disc-type motor with adjustable stator-rotor air gap according to claim 7, characterized in that: The spring sheet (77) has an elastic force that drives the feedback plate (73) away from the baffle (761), and the elastic traction belt (75) has an elastic force that drives the two sets of rotating seats (74) closer together.

9. The disc-type motor with adjustable stator-rotor air gap according to claim 7, 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 both coaxially arranged with the convex lens (722).

10. The disc-type motor with adjustable stator-rotor air gap according to claim 3, characterized in that: When the transparent scale plate (72) is rotated 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) is rotated 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 groups of sealing plates (121), and the rotating ring (71) and the circular through hole (12) are in a threaded locking state.

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