Permanent magnet motor power system convenient to overhaul

Abstract

The invention relates to the technical field of self-starting permanent magnet motors, in particular to a permanent magnet motor power system convenient to overhaul, which comprises a stator punching sheet, a magnetic pole iron core, a threaded hole, a rectangular groove, a cylindrical permanent magnet, a spring, a pinion, a large gear ring, an arc-shaped groove, a compression nut, a guide bar, a pull rod, a sliding block, a compression screw and a rotating shaft. By adopting the principle of shortest path of magnetic lines and the principle of different magnetic permeability of different materials, interaction between the magnetic lines of stator and rotor during operation of the permanent magnet motor and internal interaction between the magnetic lines of rotor and rotor during stopping of the permanent magnet motor are realized, so that a rotor magnetic field forms a self-closed loop without magnetic lines with the stator when the stator and rotor are in a shutdown state; the pull-in effect between the stator and the rotor is eliminated, the stator and the rotor are easy to disassemble when the motor is overhauled, the surfaces of the stator and the rotor are further ensured, and the reliability of the permanent magnet motor is improved.

Description

Technical Field

[0001] This invention relates to the field of self-starting permanent magnet motor technology, specifically to a permanent magnet motor power system that is easy to maintain. Background Technology

[0002] Permanent magnet motors, also known as permanent magnet synchronous motors, use permanent magnets for excitation, which simplifies the motor structure, reduces processing and assembly costs, and eliminates the need for slip rings and brushes, which are prone to problems, thus improving the reliability of motor operation. Furthermore, since no excitation current is required, there is no excitation loss, which improves the efficiency and power density of the motor. Permanent magnet synchronous motors consist of components such as stator, rotor, and end covers. The stator is basically the same as that of a regular induction motor, but it uses a laminated structure to reduce iron losses during motor operation. The rotor can be made solid or laminated. The armature winding can be a concentrated full-pitch winding, a distributed short-pitch winding, or an unconventional winding.

[0003] In existing technologies, permanent magnet motors, due to their strong magnetic characteristics, are prone to attracting each other during rotor maintenance. Forcibly disassembling the rotor can easily damage the rotor or stator surfaces, and even destroy the insulation structure, leading to serious consequences. To prevent damage to the rotor and stator during maintenance, a special tooling system is required to ensure the concentricity of the rotor and stator, which is time-consuming, labor-intensive, and ineffective. Therefore, this invention designs a permanent magnet motor power system that facilitates maintenance. In the off state, the rotor magnetic field forms a self-enclosed loop with no magnetic field lines between the rotor and stator, eliminating the attraction effect between them. This ensures easy disassembly of the rotor and stator during maintenance, thereby protecting the rotor and stator surfaces and improving the reliability of the permanent magnet motor. Summary of the Invention

[0004] The purpose of this invention is to provide a permanent magnet motor power system that is easy to maintain, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a permanent magnet motor power system that is easy to maintain, comprising stator laminations, magnetic pole cores, threaded holes, rectangular grooves, cylindrical permanent magnets, springs, pinions, large gear rings, arc grooves, clamping nuts, guide bars, pull rods, sliders, clamping screws, and shafts. The magnetic pole cores are hollow cylindrical parts, with semi-circular grooves evenly distributed on the outer side of the cylinder for mounting the cylindrical permanent magnets. Threaded holes are provided on the arc protrusions between the semi-circular grooves for mounting the clamping screws. Evenly distributed rectangular grooves are provided on both end faces of the cylinder for accommodating the sliders and springs. The magnetic pole cores are made of a high-permeability material.

[0006] Preferably, the stator lamination is of a conventional lamination shape, and the cylindrical permanent magnet is cylindrical with a non-circular hole in the center for mounting a pull rod. The non-circular hole in the center ensures that the pull rod drives the permanent magnet to rotate.

[0007] Preferably, the pinion is a standard gear, with its tooth tip circle larger than the outer diameter of the permanent magnet to constrain the axial displacement of the permanent magnet, and a non-circular hole in the center to ensure that the pinion drives the pull rod to rotate, thereby driving the permanent magnet to rotate.

[0008] Preferably, the large gear ring is a circular ring-shaped part, whose tooth tip circle matches the tooth root circle of the small gear, and whose module and pressure angle are equal to those of the small gear, thereby ensuring that the large gear ring can effectively drive the small gear. An arc-shaped groove is provided on the inner diameter of the large gear ring for matching with the slider.

[0009] Preferably, the main body of the guide bar is a fan-shaped long strip part, with arc-shaped grooves on both straight ends of the fan shape for cooperating with permanent magnets, and countersunk holes on the outer circle of the fan shape for installing clamping screws. The guide bar is made of a low magnetic permeability material.

[0010] Preferably, the pull rod is a long strip-shaped part with threads on both sides and a cross-section in the middle that matches the non-circular hole opened in the center of the permanent magnet. The central part cooperates with the permanent magnet and the pinion to ensure that the pinion drives the pull rod, and the pull rod drives the permanent magnet to rotate. The threads on both sides cooperate with the clamping nuts to constrain the axial displacement of the permanent magnet and the pinion.

[0011] Preferably, the spring is a standard spring, and its shaped shape is smaller than the groove opened on the end face of the magnetic pole core, and the clamping nut is a standard nut.

[0012] Preferably, the slider is a rectangular part with one end and a cylindrical part with the other end, wherein the rectangular part is placed in the rectangular holes opened on both ends of the magnetic pole core, and the cylindrical part is matched with the arc-shaped groove opened on the large gear ring.

[0013] Preferably, the rotating shaft is a stepped shaft used to mount the magnetic pole core.

[0014] Preferably, the clamping screw is a standard screw.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] This invention utilizes the principle of the shortest path of magnetic field lines and the principle of different permeability of different materials to achieve the interaction of magnetic field lines between the stator and rotor during operation of the permanent magnet motor, and the interaction of magnetic field lines within the rotor when the permanent magnet motor is stopped. This enables the rotor magnetic field to form a self-enclosed loop when the stator and rotor are stopped, eliminating the magnetic field line loop between them and the stator. This eliminates the attraction effect between the stator and rotor, ensures the ease of disassembly between the stator and rotor during motor maintenance, and thus protects the surface of the stator and rotor, improving the reliability of the permanent magnet motor. Attached Figure Description

[0017] Figure 1 This is the front view of the present invention.

[0018] Figure 2 The main view of the hidden gear 5 is shown in the present invention.

[0019] Figure 3 The main view of the stator lamination 1 is hidden for the present invention.

[0020] Figure 4 This is a magnetic field diagram of the motor of the present invention during normal operation.

[0021] Figure 5 This is a magnetic field diagram of the motor of the present invention when it is stopped.

[0022] Figure 6 This is a front view of the stator lamination 1 of the present invention.

[0023] Figure 7 This is a front view of the magnetic pole core 2 of the present invention.

[0024] Figure 8 This is a right view of the magnetic pole core 2 of the present invention.

[0025] Figure 9 This is a front view of the cylindrical permanent magnet 3 of the present invention.

[0026] Figure 10 This is a front view of the pinion 5 of the present invention.

[0027] Figure 11 This is a front view of the large gear ring 6 of the present invention.

[0028] Figure 12 This is a front view of the guide bar 8 of the present invention.

[0029] Figure 13 This is a right view of the guide bar 8 of the present invention.

[0030] Figure 14 This is a front view of the pull rod 9 of the present invention.

[0031] Figure 15 This is a right view of the pull rod 9 of the present invention.

[0032] Figure 16 This is a front view of the slider 10 of the present invention.

[0033] Figure 17 This is a right view of the slider 10 of the present invention.

[0034] Figure 18 This is a front view of the rotating shaft 12 of the present invention.

[0035] In the picture:

[0036] 1. Stator lamination; 2. Magnetic pole core; 201. Threaded hole; 202. Rectangular groove; 3. Cylindrical permanent magnet; 4. Spring; 5. Pinion; 6. Large gear ring; 601. Arc groove; 7. Compression nut; 8. Guide bar; 9. Pull rod; 10. Slider; 11. Compression screw; 12. Shaft. Detailed Implementation

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0039] like Figures 1-18 As shown, this application provides a permanent magnet motor power system that is easy to maintain, including stator laminations 1, magnetic pole cores 2, threaded holes 201, rectangular grooves 202, cylindrical permanent magnets 3, springs 4, pinions 5, large gear rings 6, arc grooves 601, clamping nuts 7, guide bars 8, pull rods 9, sliders 10, clamping screws 11, and rotating shafts 12.

[0040] like Figure 5 As shown, when the permanent magnet motor stops running, the cylindrical permanent magnet 3 preferentially passes through the high permeability magnetic pole core 2, so that the magnetic lines of force form a loop through the high permeability magnetic pole core 2, instead of forming a loop through the low permeability conductor bar 8. Therefore, no magnetic line loop is formed between the stator and the rotor, there is no attraction between the stator and the rotor, and the rotor is easy to separate from the stator.

[0041] When the motor starts, such as Figure 1 As shown, the magnetic pole core 2 begins to rotate. The welded spring 4 and slider 10, installed in the rectangular groove 202 of the magnetic pole core 2, begin to move outward under the action of centrifugal force. At this time, the slider 10 moves within the large gear ring 6, driving the large gear ring 6 to rotate. Due to the interaction of the gears, the large gear ring 6 drives the small gear 5 to rotate, and the pull rod 9 installed in the small gear 5 drives the cylindrical permanent magnet 3 to rotate. When the motor reaches the rated speed, the direction of the permanent magnet changes to... Figure 4 As shown, since the thickness of the guide bar 8 is greater than the size of the air gap, the magnetic lines of force preferentially pass through the stator lamination 1 to form a loop. At this time, magnetic lines of force interact between the stator and rotor, achieving the electromagnetic conversion effect.

[0042] When the motor changes from running to stopped, the magnetic pole core 2 decelerates and rotates. The welded spring 4 and slider 10, installed in the rectangular groove 202 of the magnetic pole core 2, begin to move inwards under the tension of the spring 4. At this time, the slider 10 moves within the large gear ring 6, driving the large gear ring 6 to rotate. Due to the interaction of the gears, the large gear ring 6 drives the small gear 5 to rotate, and the pull rod 9 installed within the small gear 5 drives the cylindrical permanent magnet 3 to rotate. When the motor reaches a stopped state, the direction of the permanent magnet changes... Figure 5 As shown, the cylindrical permanent magnet 3 preferentially passes through the high-permeability magnetic pole core 2, so that the magnetic lines of force form a loop through the high-permeability magnetic pole core 2, instead of forming a loop through the low-permeability conductor bar 8. Therefore, no magnetic line loop is formed between the stator and the rotor, there is no attraction between the stator and the rotor, and the rotor is easy to separate from the stator.

[0043] The specific solution is as follows: The magnetic pole core 2 is installed on the rotating shaft 12, and the cylindrical permanent magnet 3 is installed in the semi-circular grooves evenly distributed on the outer side of the magnetic pole core 2. Then, the guide bar 8 is installed on the outer side of the cylindrical permanent magnet 3, and the guide bar 8 is connected to the magnetic pole core 2 by the clamping screw 11 to ensure that the cylindrical permanent magnet 3 has no displacement in the radial direction of the magnetic pole core 2. The pull rod 9 is placed in the non-circular hole in the center of the cylindrical permanent magnet 3 to drive the cylindrical permanent magnet 3 to rotate. The pinion 5 is installed on both sides of the cylindrical permanent magnet 3. The non-circular hole in the center of the pinion 5 cooperates with the pull rod 9 to ensure that when the pinion 5 rotates, it drives the pull rod 9 to rotate, which in turn drives the cylindrical permanent magnet 3 to rotate. The clamping nuts 7 are installed on both sides of the pull rod 9 to ensure that the cylindrical permanent magnet 3 has no axial displacement. Welded springs 4 and sliders 10 are installed in rectangular grooves 202 opened at both ends of the magnetic pole core 2. Then, large gear ring 6 is installed on both sides of the magnetic pole core 2. The arc groove 601 of the large gear ring 6 cooperates with the cylindrical part of the slider 10 to ensure that the slider 10 can drive the large gear ring 6 to rotate when it moves, thereby driving the pinion 5, the pull rod 9 and the cylindrical permanent magnet 3 to rotate. A clamping nut 7 is installed on the outside of the cylindrical part of the slider 10 to ensure that the large gear ring 6 has no axial displacement. At this time, a rotor system is formed. Finally, the rotor system is installed in the inner hole of the stator lamination 1. At this time, a permanent magnet motor power system that is easy to maintain is formed.

[0044] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary; within the framework of this invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

[0045] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A permanent magnet motor power system that is easy to maintain, characterized in that, The system includes a stator lamination (1), a magnetic pole core (2), a threaded hole (201), a rectangular groove (202), a cylindrical permanent magnet (3), a spring (4), a pinion (5), a large gear ring (6), an arc groove (601), a clamping nut (7), a guide bar (8), a pull rod (9), a slider (10), a clamping screw (11), and a rotating shaft (12). The magnetic pole core (2) is a hollow cylindrical part. Semi-circular grooves are evenly distributed on the outer side of the cylinder for installing the cylindrical permanent magnet (3). Threaded holes (201) are opened on the arc protrusions between the semi-circular grooves for installing the clamping screw (11). Evenly distributed rectangular grooves (202) are opened on both ends of the cylinder for placing the slider (10) and the spring (4). The magnetic pole core (2) is made of a high permeability material.

2. The permanent magnet motor power system for easy maintenance according to claim 1, characterized in that, The stator lamination (1) is a conventional lamination shape, and the cylindrical permanent magnet (3) is cylindrical. A non-circular hole is provided in the center of the cylindrical shape for installing the pull rod (9). The non-circular hole in the center is used to ensure that the pull rod (9) drives the permanent magnet to rotate.

3. The permanent magnet motor power system for easy maintenance according to claim 1, characterized in that, The pinion (5) is a standard gear, and its tooth tip circle is larger than the outer diameter of the permanent magnet to constrain the axial displacement of the permanent magnet. A non-circular hole is opened in the center to ensure that the pinion (5) drives the pull rod (9) to rotate, thereby driving the permanent magnet to rotate.

4. The permanent magnet motor power system for easy maintenance according to claim 1, characterized in that, The large gear ring (6) is a circular ring-shaped part. Its tooth tip circle matches the tooth root circle of the small gear (5), and its module and pressure angle are equal to those of the small gear (5), thereby ensuring that the large gear ring (6) can effectively drive the small gear (5). An arc groove (601) is provided on the inner diameter of the large gear ring (6) for matching with the slider (10).

5. A permanent magnet motor power system for easy maintenance according to claim 1, characterized in that, The main body of the guide bar (8) is a fan-shaped long strip. Arc grooves (601) are provided on the straight ends of both sides of the fan shape for cooperating with permanent magnets. Countersunk holes are provided on the outer circle of the fan shape for installing clamping screws (11). The guide bar (8) is made of a low magnetic permeability material.

6. The permanent magnet motor power system for easy maintenance according to claim 1, characterized in that, The pull rod (9) is a long strip-shaped part with threads on both sides and a cross-section in the middle that matches the non-circular hole opened in the center of the permanent magnet. The central part cooperates with the permanent magnet and the pinion (5) to ensure that the pinion (5) drives the pull rod (9), and the pull rod (9) drives the permanent magnet to rotate. The threads on both sides cooperate with the clamping nut (7) to constrain the axial displacement of the permanent magnet and the pinion (5).

7. A permanent magnet motor power system for easy maintenance according to claim 1, characterized in that, The spring (4) is a standard spring (4), and its shape is smaller than the groove opened on the end face of the magnetic pole core (2). The clamping nut (7) is a standard nut.

8. The permanent magnet motor power system for easy maintenance according to claim 1, characterized in that, The slider (10) is a rectangular part with one end and a cylindrical part with the other end. The rectangular part is placed in the rectangular holes opened on both ends of the magnetic pole core (2), and the cylindrical part is matched with the arc groove (601) opened on the large gear ring (6).

9. A permanent magnet motor power system for easy maintenance according to claim 1, characterized in that, The rotating shaft (12) is a stepped shaft used to install the magnetic pole core (2).

10. A permanent magnet motor power system for easy maintenance according to claim 1, characterized in that, The clamping screw (11) is a standard screw.

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