Filling and sealing tool and method for stator winding iron core

Abstract

The invention discloses a stator winding iron core potting tool and method. The tool comprises a base, an exhaust ring, a central column, a positioning core, an outer ring, a height limiting cover and a pressing plate. The method comprises the following steps: 1) installing the base, the exhaust ring, the central column, the positioning core, the stator winding iron core, the outer ring and the pressing plate; (2) sealing the positioning groove of the outer ring and the stepped groove of the base by using sealant; 3) putting the sealed encapsulation tool into a drying oven for heating and heat preservation; 4) dismounting the pressing plate, and performing potting on the stator winding iron core; (5) the outgoing line penetrates out of a line outlet hole of the height limiting cover, and the height limiting cover and the pressing plate are installed on the potting tool after potting; (6) horizontally putting the potting tool after potting into a drying oven for heating and curing, and taking out the stator winding iron core after cooling; and 7) removing the sealant and the flash on the taken stator winding iron core to obtain the encapsulated stator winding iron core. The stator winding iron core is simple in structure and suitable for a common stator winding iron core structure. The device can be repeatedly used for multiple times.

Description

Technical Field

[0001] The invention relates to the technical field of motor potting, and in particular to a stator winding core potting tool and method. Background Art

[0002] With the continuous progress and development of motor technology, users have put forward higher requirements for the stability and reliability of motor performance. As one of the core components of the motor, the insulation performance and heat dissipation effect of the stator winding directly affect the overall operating efficiency and life of the motor. The potting of the stator winding core has many advantages. It can improve the motor's voltage resistance and insulation strength, prevent current leakage, form leakage protection, prevent moisture and impurities from entering the motor, and extend the service life of the motor. The potting material has thermal conductivity and can conduct the heat inside the motor to the outer shell to reduce heat generation while maintaining good heat resistance and oil resistance. After potting, the overall mechanical strength is enhanced, which can meet the mechanical requirements of the motor. At the same time, the internal gaps and cracks of the motor are filled by potting, which reduces internal vibration and noise, improves the stability of the motor operation, improves the moisture and corrosion resistance of the motor, and adapts to different working environments. The potting process can also achieve mass production and improve production efficiency. These advantages make motor stator potting an important process in motor manufacturing. An important part of the motor stator potting process is the design of the potting mold, which directly affects the success or failure of potting.

[0003] At present, the more common motor potting process in the industry is to press the stator winding core into the casing to form the stator, and then install the potting mold on the stator for potting. This method has certain requirements for the structural design of the motor. The needs of the potting process must be fully considered in the structural design stage, and the installation sequence of the components in the motor and the structure of the casing must be adjusted to ensure the sealing of the potting and the ease of installation of the tooling. Summary of the invention

[0004] The purpose of the present invention is to provide a stator winding core potting tool and method.

[0005] The technical solution adopted to achieve the purpose of the present invention is as follows: a stator winding core potting tool, including: a base, an exhaust ring, a center column, a positioning core, an outer ring, a height limiting cover, and a pressure plate.

[0006] The top surface of the base is provided with a stepped groove, the bottom surface is provided with a groove I, and the stepped groove and the groove I are connected through a through hole I.

[0007] The inner side wall and the outer side wall of the exhaust ring are both provided with V-shaped grooves.

[0008] The central column is a column structure, and a baffle is provided at the bottom.

[0009] The top of the central column is provided with a fastening structure matched with a nut.

[0010] The positioning core is a columnar structure, and a through hole II is provided at the center along the axis.

[0011] The outer diameter of the positioning core matches the inner diameter of the stator winding core.

[0012] The top of the positioning core is provided with an inwardly inclined guiding structure, and the bottom is provided with an outwardly inclined demoulding structure.

[0013] A positioning groove is provided at the bottom center of the outer ring.

[0014] A demoulding groove is arranged inside the outer ring, and a height limiting cover installation groove is arranged on the top, and the inclinations of the demoulding groove and the height limiting cover installation groove are opposite, forming a V-shaped convex groove on the inner wall of the outer ring.

[0015] The positioning groove, the demoulding groove and the height limiting cover installation groove are connected.

[0016] The height limiting cover is a column structure, and a chassis is provided at the bottom.

[0017] A groove II is provided at the center of the top surface of the height limiting cover, and a plurality of wire outlet holes and exhaust holes are evenly surrounded by the groove II.

[0018] The wire outlet holes and the exhaust holes are distributed at intervals.

[0019] A through hole III is provided at the bottom of the groove II.

[0020] The pressing plate is a cross-shaped structure, and a through hole IV is provided at the center along the vertical line of the cross-shaped structure.

[0021] The outer diameter of the pressure plate cross-shaped structure is greater than the outer diameter of the outer ring.

[0022] The central column is inserted into the through hole I of the base, and the baffle of the central column is located in the groove I of the base.

[0023] The center column is inserted into the through hole II of the positioning core.

[0024] The demoulding structure of the positioning core is sleeved with an exhaust ring and then inserted into the stepped groove of the base.

[0025] The stator winding iron core is sleeved on the outer diameter of the positioning core, and the bottom is inserted into the stepped groove of the base.

[0026] The top of the stator winding core abuts against the positioning groove of the outer ring.

[0027] The guide structure of the positioning core is inserted into the groove II of the height limiting cover, and the height limiting cover is located in the height limiting cover installation groove of the outer ring.

[0028] The fastening structure of the center column passes through the through hole III of the height limiting cover and the through hole IV of the pressure plate in sequence and is then fixed by a nut.

[0029] Furthermore, an extension structure for demoulding is provided on the outer wall of the base.

[0030] Furthermore, the stepped groove of the base is provided with a chamfer for positioning and sealing the stator winding core.

[0031] Furthermore, the positioning groove of the outer ring is provided with a chamfer for positioning and sealing the stator winding core.

[0032] Furthermore, the stepped groove of the base has a certain slope for demoulding after potting.

[0033] Furthermore, the positioning core is made of polytetrafluoroethylene rod.

[0034] The positioning core expands and fills the inner hole of the stator winding core after being heated.

[0035] Furthermore, the base, exhaust ring, center column, outer ring, height limiting cover and pressure plate are all made of aluminum alloy.

[0036] The method for potting using the above potting tool comprises the following steps:

[0037] 1) Install the base, exhaust ring, center column, and positioning core, install the stator winding core onto the outer diameter of the positioning core, and fix it with the outer ring and pressure plate.

[0038] 2) Use sealant to seal the positioning groove of the outer ring and the stepped groove of the base.

[0039] 3) Place the sealed potting tooling into an oven for heating and heat preservation.

[0040] 4) Remove the pressure plate and pot the stator winding core.

[0041] 5) Pass the lead wire through the lead hole of the height limit cover, and install the height limit cover and the pressure plate onto the potting tooling after potting.

[0042] 6) Place the potting tooling horizontally into an oven for heating and curing, and take out the stator winding core after cooling.

[0043] 7) Remove the sealant and burrs on the removed stator winding core to obtain the potted stator winding core.

[0044] Furthermore, the sealant includes silicone rubber sealant.

[0045] The encapsulation glue includes epoxy resin.

[0046] Furthermore, the method for potting the stator winding core includes manual potting and automatic potting by equipment.

[0047] The technical effect of the present invention is unquestionable. The present invention designs a potting tool for a stator winding core, which can meet both manual potting and mechanical automatic potting. The design is simple and is based on the structure of most stator winding cores. Therefore, its structure can meet the potting requirements of most stator winding cores.

[0048] The present invention is based on potting on the stator winding core, has a wider range of applications, and is basically not affected by the casing structure. Because it is potted directly on the stator winding core, it will not affect the installation sequence of other components, and has relatively lower requirements on design and process.

[0049] The invention has a simple structure and is suitable for a common stator winding core structure; the invention is easy to use and can satisfy both manual potting and automatic potting by equipment; the invention can be repeatedly used. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is a schematic diagram of the stator winding core potting tooling;

[0051] Figure 2 is a schematic diagram of the base; Figure 2 (a) is a cross-sectional view of the base; Figure 2 (b) is a top view of the base;

[0052] Figure 3 is a schematic diagram of the exhaust ring cross section;

[0053] Figure 4 This is a schematic diagram of the central column; Figure 4 (a) is the right side view of the center column; Figure 4 (b) is the front view of the central column;

[0054] Figure 5 It is a schematic diagram of the positioning core; Figure 5 (a) is the right side view of the positioning core; Figure 5 (b) is a front view of the positioning core;

[0055] Figure 6 It is a schematic diagram of the outer circle;

[0056] Figure 7 This is a schematic diagram of the height limit cover; Figure 7 (a) is a cross-sectional view of the height limiting cover; Figure 7 (b) is a top view of the height limiting cover;

[0057] Figure 8 It is a schematic diagram of the pressure plate;

[0058] In the figure, base 1, stepped groove 101, groove I102, through hole I103, extension structure 104, exhaust ring 2, center column 3, baffle 301, fastening structure 302, positioning core 4, through hole II401, guide structure 402, demolding structure 403, outer ring 5, positioning groove 501, demolding groove 502, height limiting cover installation groove 503, height limiting cover 6, chassis 601, groove II602, through hole III603, wire outlet hole 604, exhaust hole 605, pressure plate 7, through hole IV701, stator winding core 8. DETAILED DESCRIPTION

[0059] The present invention is further described below in conjunction with the embodiments, but it should not be understood that the above subject matter of the present invention is limited to the following embodiments. Without departing from the above technical ideas of the present invention, various substitutions and changes are made according to the common technical knowledge and customary means in the art, which should all be included in the protection scope of the present invention.

[0060] Embodiment 1:

[0061] See also Figures 1 to 8 A stator winding core potting tool includes: a base 1, an exhaust ring 2, a center column 3, a positioning core 4, an outer ring 5, a height limiting cover 6, and a pressure plate 7.

[0062] The top surface of the base 1 is provided with a stepped groove 101, and the bottom surface is provided with a groove I102, and the stepped groove 101 and the groove I102 are connected through a through hole I103.

[0063] The inner wall and the outer wall of the exhaust ring 2 are both provided with V-shaped grooves.

[0064] The central column 3 is a column structure, and a baffle 301 is provided at the bottom.

[0065] The top of the central column 3 is provided with a fastening structure 302 that cooperates with a nut.

[0066] The positioning core 4 is a columnar structure, and a through hole II401 is provided at the center along the axis.

[0067] The outer diameter of the positioning core 4 matches the inner diameter of the stator winding core 8 .

[0068] The top of the positioning core 4 is provided with an inwardly inclined guiding structure 402 , and the bottom is provided with an outwardly inclined demoulding structure 403 .

[0069] A positioning groove 501 is provided at the bottom center of the outer ring 5 .

[0070] The outer ring 5 is provided with a demoulding groove 502 inside and a height limiting cover installation groove 503 on the top. The demoulding groove 502 and the height limiting cover installation groove 503 have opposite inclinations, forming a V-shaped convex groove on the inner wall of the outer ring 5 .

[0071] The positioning groove 501 , the demoulding groove 502 and the height limiting cover installation groove 503 are connected.

[0072] The height limiting cover 6 is a columnar structure, and a chassis 601 is provided at the bottom.

[0073] A groove II 602 is provided at the center of the top surface of the height limiting cover 6 , and a plurality of wire outlet holes 604 and exhaust holes 605 are evenly surrounded by the groove II 602 .

[0074] The wire outlet holes 604 and the exhaust holes 605 are distributed at intervals.

[0075] A through hole III603 is provided at the bottom of the groove II602.

[0076] The pressing plate 7 is a cross-shaped structure, and a through hole IV701 is provided at the center along the vertical line of the cross-shaped structure.

[0077] The outer diameter of the cross-shaped structure of the pressure plate 7 is greater than the outer diameter of the outer ring 5 .

[0078] The central column 3 is inserted into the through hole I103 of the base 1 , and the baffle 301 of the central column 3 is located in the groove I102 of the base 1 .

[0079] The center column 3 is inserted into the through hole II401 of the positioning core 4 .

[0080] The demoulding structure 403 of the positioning core 4 is put on the exhaust ring 2 and then inserted into the stepped groove 101 of the base 1 .

[0081] The stator winding core 8 is sleeved on the outer diameter of the positioning core 4 , and the bottom is inserted into the stepped groove 101 of the base 1 .

[0082] The top of the stator winding core 8 abuts against the positioning groove 501 of the outer ring 5 .

[0083] The guide structure 402 of the positioning core 4 is inserted into the groove II602 of the height limiting cover 6 , and the height limiting cover 6 is located in the height limiting cover installation groove 503 of the outer ring 5 .

[0084] The fastening structure 302 of the center column 3 passes through the through hole III603 of the height limiting cover 6 and the through hole IV701 of the pressing plate 7 in sequence, and is then fixed by a nut.

[0085] Embodiment 2:

[0086] A stator winding core potting tool, the main technical content of which is shown in Example 1. Furthermore, an extension structure 104 for demoulding is provided on the outer wall of the base 1.

[0087] Embodiment 3:

[0088] A stator winding core potting tool, the main technical content of which is shown in any one of embodiments 1 to 2. Furthermore, the stepped groove 101 of the base 1 is provided with a chamfer for positioning and sealing the stator winding core 8.

[0089] Embodiment 4:

[0090] A stator winding core potting tool, the main technical content of which is shown in any one of embodiments 1 to 3. Further, the positioning groove 501 of the outer ring 5 is provided with a chamfer for positioning and sealing the stator winding core 8.

[0091] Embodiment 5:

[0092] A stator winding core potting tool, the main technical content of which is shown in any one of embodiments 1 to 4. Furthermore, the stepped groove 101 of the base 1 has a certain slope for demoulding after potting.

[0093] Embodiment 6:

[0094] A stator winding core potting tool, the main technical content of which is shown in any one of embodiments 1 to 5, and further, the positioning core 4 is processed by polytetrafluoroethylene rod.

[0095] After being heated, the positioning core 4 expands and fills the inner hole of the stator winding core 8 .

[0096] Embodiment 7:

[0097] A stator winding core potting tool, the main technical content of which is shown in any one of Examples 1 to 6. Furthermore, the base 1, exhaust ring 2, center column 3, outer ring 5, height limiting cover 6, and pressure plate 7 are all made of aluminum alloy.

[0098] Embodiment 8:

[0099] The method for potting using the potting tool described in any one of Examples 1 to 7 comprises the following steps:

[0100] 1) Install the base, exhaust ring, center column, and positioning core, install the stator winding core onto the outer diameter of the positioning core, and fix it with the outer ring and pressure plate.

[0101] 2) Use sealant to seal the positioning groove of the outer ring and the stepped groove of the base.

[0102] 3) Place the sealed potting tooling into an oven for heating and heat preservation.

[0103] 4) Remove the pressure plate and pot the stator winding core.

[0104] 5) Pass the lead wire through the lead hole of the height limit cover, and install the height limit cover and the pressure plate onto the potting tooling after potting.

[0105] 6) Place the potting tooling horizontally into an oven for heating and curing, and take out the stator winding core after cooling.

[0106] 7) Remove the sealant and burrs on the removed stator winding core to obtain the potted stator winding core.

[0107] Embodiment 9:

[0108] A method for potting a stator winding core, the main technical content of which is shown in Example 8, and further, the sealant includes silicone rubber sealant.

[0109] The encapsulation glue includes epoxy resin.

[0110] Embodiment 10:

[0111] A method for potting a stator winding core, the main technical content of which is shown in any one of Embodiments 8 to 9. Furthermore, the method for potting the stator winding core includes manual potting and automatic potting by equipment.

[0112] Embodiment 11:

[0113] See also Figures 1 to 8 A stator winding core potting tool includes: a base 1, an exhaust ring 2, a center column 3, a positioning core 4, an outer ring 5, a height limiting cover 6, and a pressure plate 7.

[0114] The top surface of the base 1 is provided with a stepped groove 101, and the bottom surface is provided with a groove I102, and the stepped groove 101 and the groove I102 are connected through a through hole I103.

[0115] The inner wall and the outer wall of the exhaust ring 2 are both provided with V-shaped grooves.

[0116] The central column 3 is a column structure, and a baffle 301 is provided at the bottom.

[0117] The top of the central column 3 is provided with a fastening structure 302 that cooperates with a nut.

[0118] The positioning core 4 is a columnar structure, and a through hole II401 is provided at the center along the axis.

[0119] The outer diameter of the positioning core 4 matches the inner diameter of the stator winding core 8 .

[0120] The top of the positioning core 4 is provided with an inwardly inclined guiding structure 402 , and the bottom is provided with an outwardly inclined demoulding structure 403 .

[0121] A positioning groove 501 is provided at the bottom center of the outer ring 5 .

[0122] The outer ring 5 is provided with a demoulding groove 502 inside and a height limiting cover installation groove 503 on the top. The demoulding groove 502 and the height limiting cover installation groove 503 have opposite inclinations, forming a V-shaped convex groove on the inner wall of the outer ring 5 .

[0123] The positioning groove 501 , the demoulding groove 502 and the height limiting cover installation groove 503 are connected.

[0124] The height limiting cover 6 is a columnar structure, and a chassis 601 is provided at the bottom.

[0125] A groove II 602 is provided at the center of the top surface of the height limiting cover 6 , and a plurality of wire outlet holes 604 and exhaust holes 605 are evenly surrounded by the groove II 602 .

[0126] The wire outlet holes 604 and the exhaust holes 605 are distributed at intervals.

[0127] A through hole III603 is provided at the bottom of the groove II602.

[0128] The pressing plate 7 is a cross-shaped structure, and a through hole IV701 is provided at the center along the vertical line of the cross-shaped structure.

[0129] The outer diameter of the cross-shaped structure of the pressure plate 7 is greater than the outer diameter of the outer ring 5 .

[0130] The central column 3 is inserted into the through hole I103 of the base 1 , and the baffle 301 of the central column 3 is located in the groove I102 of the base 1 .

[0131] The center column 3 is inserted into the through hole II401 of the positioning core 4 .

[0132] The demoulding structure 403 of the positioning core 4 is put on the exhaust ring 2 and then inserted into the stepped groove 101 of the base 1 .

[0133] The stator winding core 8 is sleeved on the outer diameter of the positioning core 4 , and the bottom is inserted into the stepped groove 101 of the base 1 .

[0134] The top of the stator winding core 8 abuts against the positioning groove 501 of the outer ring 5 .

[0135] The guide structure 402 of the positioning core 4 is inserted into the groove II602 of the height limiting cover 6 , and the height limiting cover 6 is located in the height limiting cover installation groove 503 of the outer ring 5 .

[0136] The fastening structure 302 of the center column 3 passes through the through hole III603 of the height limiting cover 6 and the through hole IV701 of the pressing plate 7 in sequence, and is then fixed by a nut.

[0137] Embodiment 12:

[0138] A stator winding core potting tool, the main technical content of which is shown in Example 11. Furthermore, an extension structure 104 for demoulding is provided on the outer wall of the base 1.

[0139] Embodiment 13:

[0140] A stator winding core potting tool, the main technical content of which is shown in any one of Examples 11 to 12. Furthermore, the stepped groove 101 of the base 1 is provided with a chamfer for positioning and sealing the stator winding core 8.

[0141] Embodiment 14:

[0142] A stator winding core potting tool, the main technical content of which is shown in any one of Examples 11 to 13. Furthermore, the positioning groove 501 of the outer ring 5 is provided with a chamfer for positioning and sealing the stator winding core 8.

[0143] Embodiment 15:

[0144] A stator winding core potting tool, the main technical content of which is shown in any one of Examples 11 to 14. Furthermore, the stepped groove 101 of the base 1 has a certain slope for demolding after potting.

[0145] Embodiment 16:

[0146] A stator winding core potting tool, the main technical content of which is shown in any one of Examples 11 to 15, and further, the positioning core 4 is processed by polytetrafluoroethylene rod.

[0147] After being heated, the positioning core 4 expands and fills the inner hole of the stator winding core 8 .

[0148] Embodiment 17:

[0149] A stator winding core potting tool, the main technical content of which is shown in any one of Examples 11 to 16. Furthermore, the base 1, exhaust ring 2, center column 3, outer ring 5, height limiting cover 6, and pressure plate 7 are all made of aluminum alloy.

[0150] Embodiment 18:

[0151] The method for potting using the potting tool described in any one of Examples 11-17 comprises the following steps:

[0152] 1) Install the base, exhaust ring, center column, and positioning core, install the stator winding core onto the outer diameter of the positioning core, and fix it with the outer ring and pressure plate.

[0153] 2) Use sealant to seal the positioning groove of the outer ring and the stepped groove of the base.

[0154] 3) Place the sealed potting tooling into an oven and heat to 60°C for 1 hour.

[0155] 4) Remove the pressure plate and pot the stator winding core.

[0156] 5) Pass the lead wire through the lead hole of the height limit cover, and install the height limit cover and the pressure plate onto the potting tooling after potting.

[0157] 6) Place the potting tooling horizontally into an oven for heating and curing, and take out the stator winding core after cooling.

[0158] 7) Remove the sealant and burrs on the removed stator winding core to obtain the potted stator winding core.

[0159] Use an electrician's knife to remove the sealant on the outer circle of the stator winding core, and remove the hexagonal nut, pressure plate, height limit cover and other parts in turn, and use flat-angle pliers to cut off the burrs and excess glue.

[0160] Embodiment 19:

[0161] A method for potting a stator winding core, the main technical content of which is shown in Example 18, and further, the sealant includes silicone rubber sealant.

[0162] The potting glue includes epoxy resin.

[0163] Embodiment 20:

[0164] A method for potting a stator winding core, the main technical content of which is shown in any one of Examples 18 to 19. Furthermore, the method for potting the stator winding core includes manual potting and automatic potting by equipment.

[0165] Manual potting: Weigh the epoxy glue according to the calculated amount of epoxy resin used, and put it into a vacuum chamber for degassing; take out the heated stator winding core and epoxy resin glue, and slowly pour the epoxy resin glue from the upper end of the stator winding core onto the wire package until all the glue is poured, and then put the stator winding core that has been filled with glue into the vacuum chamber again for vacuuming, and then take it out after completion. Automatic potting by equipment: Set the glue output during potting according to the calculated amount of epoxy resin used, and start the equipment for vacuum degassing; take out the heated stator winding core and put it into the vacuum potting equipment, start the equipment for vacuum potting, and then take it out and keep it horizontal after completion.

[0166] Embodiment 21:

[0167] See also Figures 1 to 8 , a stator winding core potting tool and method, the main technical contents include:

[0168] A stator winding iron core potting tool comprises a base, an exhaust ring, a center column, a positioning core, an outer ring, a height limiting cover, a pressure plate, and a hexagonal nut, and includes a method for using the potting tool.

[0169] The stator winding core potting tooling is as follows:

[0170] The inner cavity of the base is equipped with four steps. The height of the outermost step is only 1mm and chamfered, which is used to locate the outer circle of the stator winding core. At the same time, the chamfered part can be used as a sealant groove for external sealing; the second step has a certain slope, which is convenient for demoulding after potting; the third step is used for the installation of the exhaust ring; the fourth step is used for the installation of the positioning core. In addition, a through hole is provided in the center of the base for the installation of the center column. The inner and outer cylindrical surfaces of the exhaust ring are provided with V-shaped grooves, which are conducive to exhaust during potting and can also be used as an overflow trough. The center column is a component that connects the potting tooling and the stator winding core. The upper end is processed with threads, and the potting tooling and the stator winding core can be pressed together in combination with a hexagonal nut. The positioning core is divided into four sections, from top to bottom, one to four sections respectively. The first section is a truncated cone with a certain slope. Its large end is basically consistent with the inner diameter of the stator winding core, which is used for guidance during installation. The second section is a cylinder with a diameter basically consistent with the inner circle of the stator winding core. The third section is a truncated cone, which also has a certain slope. Its small end is basically consistent with the inner diameter of the stator winding core, which is convenient for demoulding after potting. The fourth section is a cylinder with a diameter consistent with the large end of the third section. There is a through hole processed in its axis part for the installation of the center column. The positioning core is processed with polytetrafluoroethylene rods, whose thermal expansion coefficient is greater than that of silicon steel sheets. When heated, the positioning core expands to fill the inner hole of the stator winding core. The inner cavity of the outer ring is provided with three steps. The outermost step is the same as the base, with a height of only 1mm and chamfered, which is used for positioning the outer circle of the stator winding core. At the same time, the chamfered part can be used as a sealant groove for external sealing; the second step has a certain slope, which is convenient for demoulding after potting; the slope of the third step is opposite to that of the second step. The height limit cover has a circular chassis with a round tube structure processed on it. After the round tube structure and the third step of the outer ring and the first section of the positioning core are installed, a V-shaped ring groove is formed on the inner circle and the outer circle respectively. Because there is a certain gap at the bottom of the V-shaped ring groove, the excess potting glue will be squeezed into the V-shaped ring groove after the height limit cover is installed. Because the gap is very small, the colloid here is very thin after curing, and it is slightly stressed during demoulding. The excess potting glue can be broken at the bottom of the V-shaped ring groove and easily removed. In addition, the round tube part of the height limit cover is processed with a through hole along the axial direction for the passage of the lead wire, and evenly distributed exhaust holes are also provided to further strengthen the exhaust. The center of the disc is also provided with a through hole for the center column to pass through. The pressure plate is a cross-shaped structure, and a through hole for the center column to pass through is provided at the center of the circle, which is used to press the outer ring, the height limit cover and the positioning core. After all parts are installed, the tooling is pressed against the stator winding core using a hexagonal nut and a center column.

[0171] The stator winding core potting method is as follows:

[0172] 1) Install the base, center column, exhaust ring, and positioning core, then install the stator winding core (lead wire facing up) on the tooling, then install the outer ring to the stator winding core lead wire end, install the pressure plate, and lock it with a hexagonal nut.

[0173] 2) Apply silicone rubber sealant to the contact point between the outer circle of the stator winding core and the tooling for sealing, and leave it at room temperature or heat it at low temperature to cure the sealant.

[0174] 3) Put the stator winding core that has completed steps 1)-2) into an oven together with the tooling and heat to 60°C for 1 hour;

[0175] 4) Manual potting: weigh the epoxy glue according to the calculated amount of epoxy resin used, and put it into a vacuum chamber for degassing; take out the heated stator winding core and epoxy resin glue, and slowly pour the epoxy resin glue from the upper end of the stator winding core onto the wire package until all the glue is poured, and put the stator winding core that has been filled with glue into the vacuum chamber again to evacuate the vacuum, and take it out after completion. Automatic potting by equipment: set the glue output during potting according to the calculated amount of epoxy resin used, and start the equipment for vacuum degassing; take out the heated stator winding core and put it into the vacuum potting equipment, start the equipment for vacuum potting, and take it out and keep it horizontal after completion.

[0176] 5) Remove the hexagonal nut and pressure plate, pass the lead wire through the height limit cover, and install the height limit cover on the stator winding core that has been potted, and then reinstall and tighten the hexagonal nut and pressure plate.

[0177] 6) Place the stator winding core that has completed the above steps horizontally into an oven for heating and curing, and take it out after cooling down.

[0178] 7) Use an electrician's knife to remove the sealant on the outer circle of the stator winding core, and remove the hexagonal nut, pressure plate, height limit cover and other parts in turn, and use flat-angle pliers to cut off the burrs and excess glue.

[0179] At this point, the stator winding core is potted. The potting tooling is made of aluminum alloy with high finish. The epoxy resin has weak adhesion to it. The colloid on the tooling can be easily removed using tools such as electrician's knives, which will not affect the next use.

Claims

1. A stator winding core potting tool, characterized in that: include: Base (1), exhaust ring (2), center column (3), positioning core (4), outer ring (5), height limiting cover (6), pressing plate (7); The top surface of the base (1) is provided with a stepped groove (101), the bottom surface is provided with a groove I (102), and the stepped groove (101) and the groove I (102) are connected via a through hole I (103); The inner side wall and the outer side wall of the exhaust ring (2) are both provided with V-shaped grooves; The central column (3) is a column structure, and a baffle (301) is provided at the bottom. The top of the central column (3) is provided with a fastening structure (302) that cooperates with a nut; The positioning core (4) is a columnar structure, and a through hole II (401) is provided at the center along the axis. The outer diameter of the positioning core (4) matches the inner diameter of the stator winding iron core (8); The top of the positioning core (4) is provided with an inwardly inclined guiding structure (402), and the bottom is provided with an outwardly inclined demoulding structure (403); A positioning groove (501) is provided at the bottom center of the outer ring (5); The outer ring (5) is provided with a demoulding groove (502) inside and a height limiting cover installation groove (503) on the top, and the demoulding groove (502) and the height limiting cover installation groove (503) have opposite inclinations, forming a V-shaped convex groove on the inner wall of the outer ring (5); The positioning groove (501), the demoulding groove (502) and the height limiting cover installation groove (503) are connected; The height limiting cover (6) is a columnar structure, and a chassis (601) is provided at the bottom; A groove II (602) is provided at the center of the top surface of the height limiting cover (6), and a plurality of wire outlet holes (604) and exhaust holes (605) are evenly surrounded by the groove II (602); The wire outlet holes (604) and the exhaust holes (605) are distributed at intervals; A through hole III (603) is provided at the bottom of the groove II (602); The pressing plate (7) is a cross-shaped structure, and a through hole IV (701) is provided at the center along the vertical line of the cross-shaped structure; The outer diameter of the cross-shaped structure of the pressure plate (7) is greater than the outer diameter of the outer ring (5); The central column (3) is inserted into the through hole I (103) of the base (1), and the baffle (301) of the central column (3) is located in the groove I (102) of the base (1); The central column (3) is inserted into the through hole II (401) of the positioning core (4); The demoulding structure (403) of the positioning core (4) is inserted into the stepped groove (101) of the base (1) after the exhaust ring (2) is put on; The stator winding iron core (8) is sleeved on the outer diameter of the positioning core (4), and the bottom is inserted into the stepped groove (101) of the base (1); The top of the stator winding core (8) abuts against the positioning groove (501) of the outer ring (5); The guide structure (402) of the positioning core (4) is inserted into the groove II (602) of the height limiting cover (6), and the height limiting cover (6) is located in the height limiting cover installation groove (503) of the outer ring (5); The fastening structure (302) of the central column (3) passes through the through hole III (603) of the height limiting cover (6) and the through hole IV (701) of the pressure plate (7) in sequence, and is then fixed by a nut.

2. The stator winding core potting tool according to claim 1, characterized in that: An extension structure (104) for demoulding is provided on the outer wall of the base (1).

3. The stator winding core potting tool according to claim 1, characterized in that: The stepped groove (101) of the base (1) is provided with a chamfer for positioning and sealing the stator winding core (8).

4. The stator winding core potting tool according to claim 1, characterized in that: The positioning groove (501) of the outer ring (5) is provided with a chamfer for positioning and sealing the stator winding core (8).

5. The stator winding core potting tool according to claim 1, characterized in that: The stepped groove (101) of the base (1) has a certain slope and is used for demoulding after potting.

6. The stator winding core potting tool according to claim 1, characterized in that: The positioning core (4) is made of polytetrafluoroethylene rod; The positioning core (4) expands and fills the inner hole of the stator winding core (8) after being heated.

7. The stator winding core potting tool according to claim 1, characterized in that: The base (1), the exhaust ring (2), the central column (3), the outer ring (5), the height limiting cover (6), and the pressure plate (7) are all made of aluminum alloy.

8. A method for potting using the potting tool according to any one of claims 1 to 7, characterized in that: The following steps are involved: 1) Install the base, exhaust ring, center column, and positioning core, install the stator winding core on the outer diameter of the positioning core, and fix it through the outer ring and pressure plate; 2) Use sealant to seal the positioning groove of the outer ring and the stepped groove of the base; 3) placing the sealed potting tooling into an oven for heating and heat preservation; 4) Remove the pressing plate and potting the stator winding core; 5) Pass the lead wire through the lead hole of the height limit cover, and install the height limit cover and the pressure plate on the potting tooling after potting; 6) Place the potting tooling horizontally into an oven for heating and curing, and take out the stator winding core after cooling; 7) Remove the sealant and burrs on the removed stator winding core to obtain the potted stator winding core.

9. The potting method according to claim 8, characterized in that: The sealant includes silicone rubber sealant; The potting glue includes epoxy resin.

10. The potting method according to claim 8, characterized in that: The method for potting the stator winding core includes manual potting and automatic potting by equipment.

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