A continuous paint dripping process for stator winding package of rotary transformer

Abstract

The present invention discloses a continuous paint dripping process for the stator winding package of a rotary transformer, including the following processes: (1) preheating: passing the stator winding package to be dripped with paint through a tunnel furnace for preheating; (2) primary paint dripping: placing the preheated stator winding package on a paint dripping machine for primary paint dripping; (3) primary curing: passing the stator winding package through a tunnel furnace for primary curing after the primary paint dripping; (4) secondary paint dripping: placing the stator winding package after the primary curing on the stator winding package on a paint dripping machine for secondary paint dripping; (5) secondary curing: passing the stator winding package through a tunnel furnace for secondary curing after the secondary paint dripping. Through the technical solution of the present invention, the gaps between the copper wires inside the winding package are fully filled with varnish, and the copper wires on the surface of the winding package are also fully covered with varnish, thereby effectively protecting the stator winding package, preventing the copper wires from being damaged due to external force or poor environment during subsequent processing, transportation, testing, installation and use, ensuring the working stability of the rotary transformer, and improving the service life of the rotary transformer.

Description

Technical Field

[0001] The invention belongs to the technical field of motor paint dripping, and in particular relates to a continuous paint dripping process for a stator coil of a rotary transformer. Background Art

[0002] A resolver is a small AC motor used to measure angles. It is used to measure the angular displacement and angular velocity of a rotating object's shaft. Due to its simple structure, light weight, high operating speed and good environmental adaptability, the resolver can be used as a position and speed sensor for permanent magnet motors in electric vehicles. It is widely used in the field of new energy vehicles, such as hybrid low-emission vehicles (LEV), hybrid electric vehicles (HEV), fuel cell vehicles (FCEV), electric vehicles (EV), etc.

[0003] The reluctance rotary transformer includes a stator and a rotor structure, and the stator winding includes an excitation winding, a sine output winding, and a cosine output winding. The stator is composed of a stator core and copper wires wound on the stator core wire slots. Since the copper wire used for winding the stator core is generally small in diameter and there are fluctuations in the winding tension during the winding process, the copper wire is exposed after the winding is completed. During the subsequent processing, transportation, testing, installation, and use, it is easy to be damaged by sharp objects and unnecessary external stress, which can cause the copper wire to be damaged, resulting in abnormal performance of the rotary transformer and reduced service life. Summary of the invention

[0004] In view of the above-mentioned problems, the present invention provides a continuous paint dripping process for the stator winding of a rotary transformer, which solves the technical problems that the exposed winding of the stator of the rotary transformer is easily damaged, resulting in abnormal performance.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A continuous paint dripping process for a rotary transformer stator coil includes the following process steps:

[0007] (1) Preheating: The stator coil to be painted is preheated in a tunnel furnace;

[0008] (2) One-time paint dripping: Set the parameters of the paint dripping machine, place the preheated stator coil on the paint dripping machine, and perform the paint dripping process;

[0009] (3) One-time curing: Set the process parameters of the tunnel furnace and pass the stator coil package through the tunnel furnace for one-time curing after the first dripping of paint;

[0010] (4) Secondary paint dripping: Set the parameters of the paint dripping machine, place the stator wire package after primary curing on the paint dripping machine, and perform the secondary paint dripping process;

[0011] (5) Secondary curing: Set the process parameters of the tunnel furnace, and pass the stator wire package through the tunnel furnace for secondary curing after the second dripping of paint to complete the dripping process so that the paint layer can cover the entire surface of the stator wire package.

[0012] As a further technical solution, the paint dripping process includes dripping paint on the front and back sides of the stator coil.

[0013] As a further technical solution, the parameters of the paint dripping machine include paint dripping pressure and paint dripping speed; the process parameters of the tunnel furnace include the rotation speed of the tunnel furnace and the temperature of the tunnel furnace.

[0014] As a further technical solution, the paint dripping pressure is: 0.05-0.5MPa; the paint dripping speed is 10-30 mm / s; the tunnel furnace speed is 110-460r / min, and the tunnel furnace temperature is 110-190°C.

[0015] As a further technical solution, the preheating temperature in step (1) is 100-180°C.

[0016] The present invention also proposes a paint dripping device for completing the continuous paint dripping process of the stator winding package of the rotary transformer as described above, comprising a first tunnel furnace, a first paint dripping unit, a second tunnel furnace, a second paint dripping unit and a third tunnel furnace arranged in sequence.

[0017] As a further technical solution, the first tunnel furnace is used to preheat the stator wire package; the first paint dripping unit is used to drip paint on the stator wire package once; the second tunnel furnace is used to cure the stator wire package once; the second paint dripping unit is used to drip paint on the stator wire package twice; and the third tunnel furnace is used to cure the stator wire package twice.

[0018] As a further technical solution, the first tunnel furnace, the second tunnel furnace and the third tunnel furnace have the same structure, including a conveying unit, a wind shielding unit, a tunnel furnace shell, an emergency stop unit and an electric control unit arranged on an equipment bracket. The wind shielding unit is arranged at the end of the tunnel furnace shell, the emergency stop unit is arranged on the equipment bracket at the rear end of the tunnel furnace shell, and the electric control unit is arranged on the side of the equipment bracket.

[0019] As a further technical solution, the first paint dripping unit and the second paint dripping unit respectively include two paint dripping machines, which are used to drip paint on the front and back sides of the stator coil respectively.

[0020] As a further technical solution, the paint dripping machine includes a panel table, a paint dripping unit, a servo drive unit, a synchronous transmission unit, a clamping unit, a clamping unit fixing table, a control unit and a guide rail unit. The clamping unit is arranged on the guide rail unit through the clamping unit fixing table. The guide rail unit is fixed on the panel table. Vertical guide rails are arranged on both sides of the panel table. A servo drive unit is arranged on the vertical guide rails. The servo drive unit drives the paint dripping unit to drip paint according to a paint dripping program through the synchronous transmission unit. The control unit is used to set the paint dripping program.

[0021] Through the continuous paint dripping process of the stator winding package of the present invention, the gaps between the copper wires inside the winding package can be fully filled with varnish, and the copper wires on the surface of the winding package can be fully covered by the varnish, thereby effectively protecting the stator winding package of the rotary transformer and preventing the copper wires from being damaged due to external force or adverse environment during subsequent processing, transportation, testing, installation and use, thereby ensuring the working stability of the rotary transformer and increasing the service life of the rotary transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the stator and winding structure of the rotary transformer of the present invention;

[0023] Figure 2 It is a schematic diagram of the paint dripping equipment structure of the present invention;

[0024] Figure 3 It is a schematic structural diagram of the first tunnel furnace and the first paint dripping unit of the present invention;

[0025] In the figure: 1. Conveying unit; 2. Wind shielding unit; 3. Tunnel furnace shell; 4. Emergency stop unit; 5. Electronic control unit; 6. Panel table; 7. Paint dripping unit; 8. Servo drive unit; 9. Synchronous transmission unit; 10. Clamping unit; 11. Clamping unit fixing table; 12. Control unit; 13. Guide rail unit; 14. Vertical guide rail; 15. First tunnel furnace; 16. First paint dripping unit; 17. Second tunnel furnace; 18. Second paint dripping unit; 19. Third tunnel furnace. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] A continuous paint dripping process for a rotary transformer stator coil, the specific process steps are as follows: after the rotary transformer stator core is wound and welded (the copper wire is welded to the terminal), the stator semi-finished product to be dripped is first preheated in a tunnel furnace, the purpose of preheating is to ensure that the varnish exhibits better fluidity and permeability on the hot coil, so that the varnish is fully filled in the gaps between the copper wires of the coil, and then the parameters of the paint dripping machine and the tunnel furnace are set, including the paint dripping air pressure and paint dripping speed of the paint dripping machine, the speed and temperature of the tunnel furnace and other parameters, and the initial front and back paint dripping of the semi-finished stator coil of the rotary transformer is performed, and then the initial curing is performed in the tunnel furnace to initially form a paint layer with a certain strength, so as to achieve the purpose of protecting the coil. Because the varnish has a certain fluidity and permeability before curing, the varnish dripped on the front and back of the coil is easy to penetrate into the inside of the coil, and after the initial curing, there is almost no varnish protective layer on the surface of the coil, so it is necessary to perform secondary paint dripping and secondary curing on the front and back of the coil again, so that the paint layer can cover all the coil surfaces.

[0028] After adopting the process of the present invention: set the parameters of the tunnel furnace and the paint dripping machine, preheat the semi-finished product, and cure the semi-finished product by continuous paint dripping on the front and back sides, and cut the final product into pieces for sample preparation (such as Figure 1 ). The varnish can evenly cover the surface of the wire package, and the gaps between the copper wires inside the wire package are fully filled with the varnish.

[0029] like Figure 2 and Figure 3 As shown, the paint dripping equipment used in the paint dripping process of the present invention includes a first tunnel furnace 15, a first paint dripping unit 16, a second tunnel furnace 17, a second paint dripping unit 18 and a third tunnel furnace 19 which are arranged in sequence. Specifically, the first tunnel furnace 15 is used to preheat the stator winding package; the first paint dripping unit 16 is used to drip paint on the stator winding package once; the second tunnel furnace 17 is used to cure the stator winding package once; the second paint dripping unit 18 is used to drip paint on the stator winding package twice; and the third tunnel furnace 19 is used to cure the stator winding package twice.

[0030] The first tunnel furnace 15, the second tunnel furnace 17 and the third tunnel furnace 19 have the same structure, including a conveying unit 1, a wind shielding unit 2, a tunnel furnace shell 3, an emergency stop unit 4 and an electric control unit 5 arranged on an equipment bracket, the wind shielding unit 2 is arranged at the end of the tunnel furnace shell 3, the emergency stop unit 4 is arranged on the equipment bracket at the rear end of the tunnel furnace shell 3, and the electric control unit 5 is arranged on the side of the equipment bracket.

[0031] The first paint dripping unit 16 and the second paint dripping unit 18 respectively include two paint dripping machines, which are respectively used to drip paint on the front and back sides of the stator winding package; the paint dripping machine includes a panel table 6, a paint dripping unit 7, a servo drive unit 8, a synchronous transmission unit 9, a clamping unit 10, a clamping unit fixing table 11, a control unit 12 and a guide rail unit 13. The clamping unit 10 is arranged on the guide rail unit 13 through the clamping unit fixing table 11, and the guide rail unit 13 is fixed on the panel table 6. Vertical guide rails 14 are arranged on both sides of the panel table 6, and the servo drive unit 8 is arranged on the vertical guide rails 14. The servo drive unit 8 drives the paint dripping unit 7 to drip paint according to a pre-set paint dripping program through the synchronous transmission unit 9, and the control unit 12 is used to set the paint dripping program.

[0032] The layout of the rotating transformer stator paint dripping process equipment is as follows Figure 2 As shown, first, the employee turns on the electronic control unit 5 of the first tunnel furnace 15 for preheating and sets the parameters, places the rotary transformer on the conveying unit 1 for preheating, and at the same time turns on the control units 12 of the two paint dripping machines of the first paint dripping unit 16 and sets the parameters. The employee places the preheated sample on the clamping unit 10, and the servo drive unit 8 drives the paint dripping unit 7 through the synchronous transmission unit 9, and paints the front and back sides of the sample respectively according to the paint dripping program. The product of the first paint dripping is cured by the second tunnel furnace 17. At this time, the varnish coverage on the surface of the wire package is insufficient, and then the second paint dripping unit 18 and the third tunnel furnace 19 are used in turn to drip paint and cure the front and back sides of the sample for the second time according to the above-mentioned paint dripping and curing process.

[0033] Through the continuous paint dripping process of the stator winding package of the present invention, the gaps between the copper wires inside the winding package can be fully filled with varnish, and the copper wires on the surface of the winding package can be fully covered by the varnish, thereby effectively protecting the stator winding package of the rotary transformer and preventing the copper wires from being damaged due to external force or adverse environment during subsequent processing, transportation, testing, installation and use, thereby ensuring the working stability of the rotary transformer and increasing the service life of the rotary transformer.

Claims

1. A continuous paint dripping process for a rotary transformer stator coil, characterized in that: The process steps include: (1) Preheating: The stator coil to be painted is preheated in a tunnel furnace; (2) One-time paint dripping: Set the parameters of the paint dripping machine, place the preheated stator coil on the paint dripping machine, and perform the paint dripping process; (3) One-time curing: Set the process parameters of the tunnel furnace and pass the stator coil package through the tunnel furnace for one-time curing after the first dripping of paint; (4) Secondary paint dripping: Set the parameters of the paint dripping machine, place the stator wire package after primary curing on the paint dripping machine, and perform the secondary paint dripping process; (5) Secondary curing: Set the process parameters of the tunnel furnace, pass the stator coil package through the tunnel furnace for secondary curing after the secondary dripping paint, complete the dripping paint process, and make the paint layer cover all the surfaces of the stator coil package; The parameters of the paint dripping machine include the paint dripping pressure and the paint dripping speed; the process parameters of the tunnel furnace include the rotation speed and the temperature of the tunnel furnace; The first and second paint dripping processes both include dripping paint on the front and back sides of the stator coil; The paint dripping pressure is: 0.05-0.5MPa; the paint dripping speed is 10-30 mm / s; the tunnel furnace speed is 110-460r / min, and the tunnel furnace temperature is 110-190°C.

2. The continuous paint dripping process for the stator winding package of a rotary transformer according to claim 1 is characterized in that: The preheating temperature in step (1) is 100-180°C.

3. A paint dripping device for completing the continuous paint dripping process of the stator winding package of the rotary transformer according to any one of claims 1-2, characterized in that: It comprises a first tunnel furnace (15), a first paint dripping unit (16), a second tunnel furnace (17), a second paint dripping unit (18) and a third tunnel furnace (19) which are arranged in sequence; The first tunnel furnace (15), the second tunnel furnace (17) and the third tunnel furnace (19) all comprise a conveying unit (1), a wind shielding unit (2), a tunnel furnace shell (3), an emergency stop unit (4) and an electric control unit (5) arranged on an equipment bracket, the wind shielding unit (2) being arranged at the end of the tunnel furnace shell (3), the emergency stop unit (4) being arranged on the equipment bracket at the rear end of the tunnel furnace shell (3), and the electric control unit (5) being arranged on the side of the equipment bracket; The first paint dripping unit (16) and the second paint dripping unit (18) respectively comprise two paint dripping machines; the paint dripping machines comprise a panel table (6), a paint dripping unit (7), a servo drive unit (8), a synchronous transmission unit (9), a clamping unit (10), a clamping unit fixing table (11), a control unit (12) and a guide rail unit (13); the clamping unit (10) is arranged on the guide rail unit (13) via the clamping unit fixing table (11); the guide rail unit (13) is fixed on the panel table (6); vertical guide rails (14) are arranged on both sides of the panel table (6); a servo drive unit (8) is arranged on the vertical guide rails (14); the servo drive unit (8) drives the paint dripping unit (7) to drip paint according to a paint dripping program via the synchronous transmission unit (9); and the control unit (12) is used to set the paint dripping program.

4. A paint dripping device according to claim 3, characterized in that: The first tunnel furnace (15) is used to preheat the stator wire package; the first paint dripping unit (16) is used to drip paint on the stator wire package once; the second tunnel furnace (17) is used to perform primary curing on the stator wire package; the second paint dripping unit (18) is used to perform secondary paint dripping on the stator wire package; and the third tunnel furnace (19) is used to perform secondary curing on the stator wire package.

5. A paint dripping device according to claim 4, characterized in that: The first tunnel furnace (15), the second tunnel furnace (17) and the third tunnel furnace (19) have the same structure.

6. A paint dripping device according to claim 4, characterized in that: The first paint dripping unit (16) and the second paint dripping unit (18) respectively comprise two paint dripping machines, which are used to drip paint on the front side and the back side of the stator coil respectively.

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