A submersible motor stator core lamination process

Abstract

The present application relates to the technical field of stator core manufacturing, and discloses a process for laminating a stator core of a submersible motor, comprising the following steps: S1, self-riveting a stator core segment of a submersible motor, a stator punching sheet 1 at the bottom, and a stator punching sheet 2, wherein a die applies a certain pressure to produce a trapezoidal protrusion during blanking; S2, riveting the trapezoidal protrusion into the through hole of the stator punching sheet 1, and thus the trapezoidal protrusion produced by the third sheet is riveted into the groove of the stator punching sheet 2; S3, inserting the stator core segment into the core shaft through the positioning key on the core shaft, rotating the next stator core segment 180° in a circle, and then similarly inserting it into the laminating core shaft; S4, placing a 200mm long loose sheet on the core shaft, placing the casing on the sliding saddle of the hydraulic press, pressurizing the stator punch segment through the hydraulic press, and completing the stator core lamination after installing a retaining ring. Through self-riveting, it becomes a stator core segment, and at the same time improves the uneven outer end surfaces of several core segments caused by inconsistent thickness of single stator punching sheets, thereby increasing the stator core stacking coefficient and improving the performance of the motor.

Description

Technical Field

[0001] The invention relates to the technical field of stator core manufacturing, in particular to a stator core lamination process for a submersible motor. Background Art

[0002] Currently, when the stator core of a submersible motor is laminated, the maximum length of the stator laminate can reach 9 meters due to the structural characteristics of the submersible motor itself, which is small in outer diameter and long in length. The current practice is to install the stator laminate on the laminated core shaft in sections of about 200 mm. The next section rotates the 200 mm stator punching 180° in the circumferential direction and continues to install it on the laminated core shaft. However, because the 200 mm long core section is made of 0.5 mm thick silicon steel sheets, there is no pressure between the sheets, so when installing it on the core shaft, it is impossible to achieve integrity and tightness. Although riveted cores are currently used in small motors, transformers, reactors and other electrical equipment, there are generally rivet holes on the punching sheets, and multiple punching sheets are riveted together through the rivet holes and pull rods. However, when the loose sheets are pressed, the total length of the punching sheets changes greatly. It is often necessary to adjust the number of stator punching sheets multiple times to meet the final size requirements. This method is more cumbersome. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the present invention provides a submersible motor stator core lamination process, which solves the problem that silicon steel sheets are stacked without pressure and cannot be integrated and tight when being passed onto the core shaft.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: A process for laminating a stator core of a submersible motor, comprising the following steps:

[0005] S1, self-riveting submersible motor stator core segment, stator punching sheet 1 and stator punching sheet 2 at the bottom will exert a certain pressure to produce a trapezoidal protrusion during blanking;

[0006] S2, the trapezoidal protrusion is riveted into the through hole of stator punching sheet 1, and the trapezoidal protrusion produced by the third sheet is riveted into the groove of stator punching sheet 2;

[0007] S3. Insert the stator core segment into the core shaft through the positioning key on the core shaft, rotate the next stator core segment 180 degrees, and then insert it into the laminated core shaft in the same way;

[0008] S4. Place 200mm long loose sheets on the core shaft, install the retaining ring on the ring groove at the lower end of the casing, place the casing on the sliding saddle of the hydraulic press, place the core support on the sliding saddle, use the overhead crane to lift the core shaft with the stator punching sheets onto the sliding saddle of the hydraulic press, place the core shaft support on the sliding saddle of the hydraulic press, push the tailstock of the hydraulic press so that the outer circle of the casing is embedded in the inner stop of the positioning seat, and continue to push the tailstock of the hydraulic press together with the casing close to the laminated core shaft to make the core shaft pass through the casing;

[0009] S5. After the stator core enters the casing and is inserted into the core shaft near the end of the pressure head, use the positioning plate to fix the tailstock of the hydraulic press, and start the hydraulic press to allow the core to enter the casing;

[0010] S6. Push open the tailstock of the hydraulic press, place the locating seat into the tail end of the casing, and insert the groove gauge into the inner stop of the tailstock pressing sleeve. Place the retaining ring sleeve on the pressing sleeve, start the hydraulic press and slowly increase the pressure.

[0011] S9. When the pressure reaches the specified pressure, use the snap ring sleeve to push the snap ring into the groove until the snap ring is seated in the groove;

[0012] S10. After pressure relief, check whether the retaining ring is fully installed in the ring groove. Finally, use the ejector pin to push the core shaft out of the inner hole of the stator core to complete the stator core lamination.

[0013] Preferably, the core shaft serves as the basic component of the entire device, and is used to carry and assemble each processing mechanism and its subordinate structural components;

[0014] A positioning key is embedded in the outer wall of the core shaft and is used to position the stator core.

[0015] A pressing sleeve, which is arranged at one end of the outer wall of the core shaft and is used to apply pressure during the lamination process;

[0016] Connecting mechanism, which is provided on one side of the outer wall of the core shaft, for achieving the lamination of the stator core segments;

[0017] Preferably, the connecting mechanism includes a stator core segment, which is arranged inside the pressing sleeve, a tailstock pressing sleeve is provided on one side of the outer wall of the pressing sleeve, a groove gauge is provided on one side of the outer wall of the tailstock pressing sleeve, a retaining ring is provided on one side of the outer wall of the tailstock pressing sleeve, an end plate is provided on one side of the outer wall of the retaining ring, and the stator core segment is provided on one side of the end plate.

[0018] Preferably, an outer wall of the stator core segment is provided with an organic shell.

[0019] Preferably, a clamping ring sleeve is fixedly connected to one side of the outer wall of the pressing sleeve.

[0020] Preferably, a tailstock of an oil press is provided at one end of the outer wall of the core shaft, a positioning seat is provided inside the core shaft and the tailstock of the oil press, and a pressure head of an oil press is provided at the other end of the core shaft.

[0021] Preferably, the stator core segment passes through the positioning key and enters the core shaft.

[0022] Preferably, the stator core segment includes a stator punching sheet 1 and a stator punching sheet 2, and outer walls of the stator punching sheet 1 and the stator punching sheet 2 are both provided with marking grooves.

[0023] Preferably, a through hole is opened on one side of the outer wall of the stator punching sheet one, and the size of the through hole is 4mm*1mm. A trapezoidal protrusion is provided on one side of the outer wall of the stator punching sheet two, and the height of the trapezoidal protrusion is 0.5mm. The thickness of the stator punching sheet one and the stator punching sheet two are both 0.5mm.

[0024] The present invention provides a process for laminating the stator core of a submersible motor. The process has the following beneficial effects:

[0025] 1. The present invention transforms the stator punching sheets into a stator core segment through self-riveting, which can greatly improve the efficiency of the stator punching sheets passing through the core shaft and reduce the number of times the number of stator punching sheets is adjusted during stacking. At the same time, when the core segment is passed through the core shaft, the outer circumference of the subsequent core segment is rotated 180° compared with the previous core segment. This can improve the uneven outermost end surfaces of several core segments caused by inconsistent thickness of single stator punching sheets, increase the stator core stacking coefficient, and help improve the performance of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a diagram showing the stacking of the stator core in the present invention;

[0027] Figure 2 Schematic diagram of the stator core stacking in the present invention;

[0028] Figure 3 is a schematic diagram of the core shaft in the present invention;

[0029] Figure 4 A diagram showing the core shaft of the present invention;

[0030] Figure 5 Schematic diagram of stator punching sheet 1 in the present invention;

[0031] Figure 6 Schematic diagram of the second stator punching sheet in the present invention;

[0032] Figure 7 is a schematic diagram of a stator core segment in the present invention;

[0033] Figure 8 It is a side view of the second stator punching sheet in the present invention;

[0034] Figure 9 It is a side view of the stator punching sheet 1 in the present invention.

[0035] Among them, 1. Press sleeve; 2. Snap ring sleeve; 3. Mandrel; 4. Groove gauge; 5. Tailstock press sleeve; 6. Positioning seat; 7. Casing; 8. Snap ring; 9. End plate; 10. Stator core segment; 1001. Stator punching sheet 1; 1002. Stator punching sheet 2; 1003. Trapezoidal protrusion; 11. Hydraulic press head; 12. Hydraulic press tailstock; 13. Marking groove; 14. Through hole; 15. Recess. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0037] Example:

[0038] Please see the attached Figure 1 -Attached Figure 9 The embodiment of the present invention provides a submersible motor stator core lamination process, comprising the following steps:

[0039] S1, self-riveting submersible motor stator core segment 10, stator punching sheet 1 1001 at the bottom, stator punching sheet 2 1002 will exert a certain pressure on the die to produce a trapezoidal protrusion 1003 when blanking;

[0040] S2. The trapezoidal protrusion 1003 is riveted into the through hole 14 of the stator punching sheet 1001. In this way, the trapezoidal protrusion 1003 produced by the third sheet is riveted into the groove 15 of the stator punching sheet 2 1002.

[0041] S3, insert the stator core segment into the core shaft 3 through the positioning key on the core shaft 3, rotate the next stator core segment 10 180 degrees, and then insert it into the laminated core shaft 3 in the same manner;

[0042] S4. Place 200mm long loose sheets on the core shaft 3, install the snap ring 8 on the ring groove at the lower end of the casing 7, place the casing 7 on the sliding saddle of the hydraulic press, place the core support on the sliding saddle, use a crane to lift the core shaft 3 with the stator punching sheets installed to the sliding saddle of the hydraulic press, place the core shaft 3 support on the sliding saddle of the hydraulic press, push the tailstock 12 of the hydraulic press so that the outer circle of the casing 7 is embedded in the inner stop of the positioning seat 6, and continue to push the tailstock 12 of the hydraulic press together with the casing 7 close to the laminated core shaft 3, so that the core shaft 3 penetrates the casing 7;

[0043] S5. The stator core enters the inner hole of the casing 7 until the tailstock can no longer be pushed. After the tailstock pressing sleeve 5 is inserted into the core shaft 3 near the end of the pressure head, the tailstock 12 of the hydraulic press is fixed with a positioning plate. The hydraulic press is started to allow the core to enter the casing 7.

[0044] S6. Push open the tailstock 12 of the hydraulic press, place the positioning seat 6 into the tail end of the casing 7, and insert the groove gauge 4 into the inner stop of the tailstock pressing sleeve 5. Place the retaining ring sleeve 2 on the pressing sleeve 1, start the hydraulic press and slowly increase the pressure;

[0045] S9. When the pressure reaches the specified pressure, use the snap ring sleeve 2 to push the snap ring 8 into the groove until the snap ring 8 is seated in the groove;

[0046] S10, after unloading the pressure, check whether the clamping ring 8 is fully installed in the ring groove, and finally use the ejector pin to push the core shaft 3 out of the inner hole of the stator core to complete the stator core lamination;

[0047] The core shaft 3 is the basic component of the whole device, used to carry and assemble various processing mechanisms and their subordinate structural parts;

[0048] A positioning key is embedded in one side of the outer wall of the core shaft 3 and is used to position the stator core;

[0049] A pressing sleeve 1 is provided at one end of the outer wall of the core shaft 3 and is used to apply pressure during the lamination process;

[0050] Connecting mechanism, which is provided on one side of the outer wall of the mandrel 3, for achieving the lamination of the stator core segments;

[0051] The connecting mechanism includes a stator core segment 10, which is arranged inside the pressing sleeve 1. A tailstock pressing sleeve 5 is provided on one side of the outer wall of the pressing sleeve 1. A groove gauge 4 is provided on one side of the outer wall of the tailstock pressing sleeve 5. A clamping ring 8 is provided on one side of the outer wall of the tailstock pressing sleeve 5. An end plate 9 is provided on one side of the outer wall of the clamping ring 8. The stator core segment 10 is provided on one side of the end plate 9.

[0052] A through hole 14 is formed on one side of the outer wall of the stator sheet 1001. The size of the through hole 14 is 4mm*1mm. The height of the trapezoidal protrusion 1003 is 0.5mm. The thickness of the stator sheet 1001 and the stator sheet 2 1002 are both 0.5mm.

[0053] Specifically, the stator core segment 10 of the self-riveting submersible motor has 8 evenly distributed 4mm*1mm through holes 14 on the yoke of the stator punching sheet 1001 at the bottom. The thickness of the stator punching sheet 1001 is 0.5mm. The die will apply a certain pressure to the stator punching sheet 2 1002 during blanking, and a trapezoidal protrusion 1003 is generated on the stator punching sheet 2 1002 corresponding to the 8 through holes 14 of the stator punching sheet 1 1001 through the punch. The height of the trapezoidal protrusion 1003 is 0.5mm, which is just riveted into the through hole 14 of the stator punching sheet 1 1001. In this way, the trapezoidal protrusion 1003 generated by the third sheet is riveted into the groove 15 of the stator punching sheet 2 1002. According to this principle, each sheet is It is riveted into one with the adjacent punching sheets, thereby achieving self-riveting of 200mm long and about 400 punching sheets into one. When the stator core is stacked, the core shaft 3 of the stator core stacking is inlaid with a positioning key in the outer circumferential direction, and the stator core segment 10 is provided with a marking groove 13 in the inner diameter direction. The stator core segment is inserted into the core shaft 3 through the positioning key on the core shaft 3. The next stator core segment 10 is rotated 180° in circle and then inserted into the stacked core shaft 3 in the same way. This assembly can ensure the flatness of the core end face after dozens of core segments are stacked together, thereby improving the stator core stacking coefficient. In order to ensure the length of the stator core under a specific pressure, it is convenient to increase or decrease the stator punching sheets, and finally place the 200mm long loose sheets on the core shaft 3.

[0054] The outer wall of the stator core segment 10 is provided with an organic shell 7;

[0055] A clamping ring sleeve 2 is fixedly connected to one side of the outer wall of the pressing sleeve 1;

[0056] An oil press tailstock 12 is provided at one end of the outer wall of the core shaft 3, a positioning seat 6 is provided inside the core shaft 3 and the oil press tailstock 12, and an oil press head 11 is provided at the other end of the core shaft 3;

[0057] The stator core segment 10 passes through the positioning key and enters the core shaft 3;

[0058] The stator core segment 10 includes a stator punching sheet 1 1001 and a stator punching sheet 2 1002 . The outer walls of the stator punching sheet 1 1001 and the stator punching sheet 2 1002 are both provided with a marking groove 13 .

[0059] After the tailstock 5 is put into the end portion of the core shaft 3 against the pressure head, the tailstock 12 of the hydraulic press is fixed with the positioning plate, and the hydraulic press is started to allow the core to enter the casing 7. Push open the tailstock 12 of the hydraulic press, place the positioning seat 6 into the tail end of the casing 7, and insert the groove gauge 4 into the inner stop of the tailstock pressing sleeve 5. Push the tailstock 12 of the hydraulic press, so that the tailstock pressing sleeve 5 is inserted into the inner stop of the tailstock 12 of the hydraulic press. Place the snap ring sleeve 2 on the pressing sleeve 1, start the hydraulic press and slowly increase the pressure. Pay attention to observe whether there are any abnormalities in the hydraulic press and the core. If any abnormality is found, stop the machine immediately. When the pressure reaches the specified pressure, use a steel ruler to measure the size from the end face of the casing 7 to the stator end plate 9. If it is larger than the size marked on the drawing, use the snap ring sleeve 2 to push the snap ring 8 into the groove. If it is less than or equal to the size, slightly increase the pressure and remeasure the size until the snap ring 8 is in the groove. When releasing the pressure, check whether the snap ring 8 is fully installed in the ring groove. Finally, use the push rod to push the core shaft 3 out of the inner hole of the stator core to complete the stator core lamination.

[0060] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A process for laminating the stator core of a submersible motor, characterized in that: The following steps are involved: S1, self-riveting submersible motor stator core segment (10), stator punching piece 1 (1001) at the bottom, stator punching piece 2 (1002) will exert a certain pressure on the die to produce a trapezoidal protrusion (1003) when blanking; S2, the trapezoidal protrusion (1003) is riveted into the through hole (14) of the stator punching sheet 1 (1001), and the trapezoidal protrusion (1003) produced by the third sheet is riveted into the groove (15) of the stator punching sheet 2 (1002); S3, insert the stator core segment into the core shaft (3) through the positioning key on the core shaft (3), rotate the next stator core segment (10) 180 degrees, and then insert it into the laminated core shaft (3) in the same manner; S4, place the 200mm long loose pieces on the core shaft (3), install the retaining ring (8) at the ring groove at the lower end of the casing (7), place the casing (7) on the sliding saddle of the hydraulic press, place the core support on the sliding saddle, use the overhead crane to lift the core shaft (3) with the stator punching sheet installed to the sliding saddle of the hydraulic press, place the core shaft (3) support on the sliding saddle of the hydraulic press, push the tailstock (12) of the hydraulic press so that the outer circle of the casing (7) is embedded in the inner stop of the positioning seat (6), and continue to push the tailstock (12) of the hydraulic press together with the casing (7) close to the laminated core shaft (3), so that the core shaft (3) penetrates the casing (7); S5. The stator core enters the inner hole of the housing (7) until the tailstock can no longer be pushed. After the tailstock pressing sleeve (5) is inserted into the core shaft (3) and close to the end of the pressure head, the tailstock (12) of the hydraulic press is fixed with a positioning plate. The hydraulic press is started to allow the core to enter the housing (7). S6. Push open the tailstock (12) of the hydraulic press, place the positioning seat (6) into the tail end of the housing (7), and insert the groove gauge (4) into the inner stop of the tailstock pressing sleeve (5). Place the retaining ring sleeve (2) on the pressing sleeve (1), and start the hydraulic press to slowly increase the pressure. S9. When the pressure reaches the specified pressure, use the snap ring sleeve (2) to push the snap ring (8) into the groove until the snap ring (8) is inserted into the groove; S10, after unloading the pressure, check whether the retaining ring (8) is completely installed in the ring groove, and finally use the ejector pin to push the core shaft (3) out of the inner hole of the stator core to complete the stator core lamination; The core shaft (3) serves as a basic component of the overall device and is used to carry and assemble various processing mechanisms and their subordinate structural members; a positioning key is embedded on one side of the outer wall of the core shaft (3) and is used to position the stator core; a pressing sleeve (1) is arranged on one end of the outer wall of the core shaft (3) and is used to apply pressure during the lamination process; a connecting mechanism is arranged on one side of the outer wall of the core shaft (3) and is used to achieve the lamination of the stator core segments, the connecting mechanism includes a stator core segment (10), the stator core segment (10) is arranged inside the pressing sleeve (1), a tailstock pressing sleeve (5) is arranged on one side of the outer wall of the pressing sleeve (1), a groove gauge (4) is arranged on one side of the outer wall of the tailstock pressing sleeve (5), a clamping ring (8) is arranged on one side of the outer wall of the tailstock pressing sleeve (5), an end plate (9) is arranged on one side of the outer wall of the clamping ring (8), and the stator core segment (10) is arranged on one side of the end plate (9).

2. A submersible motor stator core lamination process according to claim 1, characterized in that: An outer wall of the stator core segment (10) is provided with a housing (7).

3. The process for laminating the stator core of a submersible motor according to claim 1, characterized in that: A clamping ring sleeve (2) is fixedly connected to one side of the outer wall of the pressing sleeve (1).

4. The process for laminating the stator core of a submersible motor according to claim 1, characterized in that: An oil press tailstock (12) is provided at one end of the outer wall of the core shaft (3), a positioning seat (6) is provided inside the core shaft (3) and the oil press tailstock (12), and an oil press pressure head (11) is provided at the other end of the core shaft (3).

5. The process for laminating the stator core of a submersible motor according to claim 1, characterized in that: The stator core segment (10) passes through the positioning key and enters the core shaft (3).

6. The process for laminating the stator core of a submersible motor according to claim 1, characterized in that: The stator core segment (10) comprises a stator punching sheet 1 (1001) and a stator punching sheet 2 (1002), and the outer walls of the stator punching sheet 1 (1001) and the stator punching sheet 2 (1002) are both provided with a marking groove (13).

7. The process for laminating the stator core of a submersible motor according to claim 6, characterized in that: A through hole (14) is provided on one side of the outer wall of the stator punching sheet 1 (1001), and the size of the through hole (14) is 4mm*1mm. A trapezoidal protrusion is provided on one side of the outer wall of the stator punching sheet 2 (1002), and the height of the trapezoidal protrusion (1003) is 0.5mm. The thickness of the stator punching sheet 1 (1001) and the stator punching sheet 2 (1002) are both 0.5mm.

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