A large-capacity double-fed generator stator core lamination device

Abstract

The application discloses a large-capacity double-fed generator stator core stacking equipment and relates to the technical field of motor production, and aims at the problems of lamination dislocation or deformation caused by single high-pressure stress concentration; the application realizes gradual stacking operation through the mode of preliminary stacking combined with secondary stacking, and then the jacking action is supplemented to combine the above-mentioned stacking action, so that the positioning forming precision of the generator stator core sheet is realized, finally, under the condition of double actions, the rapid and effective stacking processing of the generator stator core sheet is completed, the motor production and processing efficiency is improved; through the added thickness detection procedure, the finished product quality detection of the generator stator core stacking processing is effectively carried out, and the selection of re-stacking and discharging is made, the stacking efficiency and the finished product quality are improved, and the preliminary stacking, the secondary stacking and the synchronous jacking action are complementary to each other, and then the finished product quality detection procedure is combined to jointly constitute the stable stacking processing of the generator stator core sheet.

Description

A large-capacity doubly-fed generator stator core stacking device Technical Field

[0001] This invention relates to the field of motor manufacturing technology, specifically to a stator core stacking device for a large-capacity doubly-fed generator. Background Technology

[0002] The motor stator core is composed of multiple layers of silicon steel sheets. These sheets require surface insulation treatment before stacking to reduce eddy current losses. The stacking process begins by stacking these silicon steel sheets in a specific order, then applying pressure using a press to ensure a tight bond. During pressing, the layers are also securely fixed using rivets or other methods to ensure the overall stability of the core. The required pressure during the stator core stacking process directly affects the pressing effect and the motor's performance. Generally, the pressure between the silicon steel sheets should be controlled within the range of 10-20 kgf / cm². This pressure range ensures a tight bond between the silicon steel sheets, preventing loosening and misalignment, while also preventing damage to the core material or insulation layer due to excessive pressure.

[0003] It is important to note that the stator core stacking factor is a crucial indicator of the quality and performance of stator core stacking, reflecting the proportion of effective material after stacking. Traditional stacking equipment typically employs a single-stage pressurization method when stacking silicon steel sheets for the core. However, as the thickness of the silicon steel sheets increases, the friction also increases accordingly. The stress concentration caused by a single high-pressure operation can easily lead to misalignment or deformation of the laminations, making it difficult to guarantee the positioning accuracy between the silicon steel sheets. Therefore, this application proposes a solution. Summary of the Invention

[0004] The purpose of this invention is to provide a large-capacity doubly-fed generator stator core lamination device to solve the problem of lamination misalignment or deformation caused by stress concentration under single high voltage.

[0005] The objective of this invention can be achieved through the following technical solution: A large-capacity doubly-fed generator stator core stacking device, comprising a main frame and a feeding roller frame, wherein a stacking plate is vertically and movably installed on the far side of the feeding roller frame and the feeding roller frame, and the stacking plate has at least three stacking cavities; a step-by-step stacking assembly is suspended above the stacking plate, the step-by-step stacking assembly comprising a swing plate, a front pressure block and a rear pressure block, the front pressure block and the rear pressure block are always vertically aligned with two of the stacking cavities; a synchronous lifting assembly is also provided below the stacking plate, the synchronous lifting assembly comprising a base plate and a top plate, the top plate being located at the inner bottom of the stacking cavity, a synchronous cylinder for driving the stacking plate to move vertically is provided under the base plate, and a stripping cylinder for driving the top plate to move vertically is provided on the base plate.

[0006] The configuration is further defined as follows: a motor is provided above the swing plate, the output end of the motor is connected to a turntable, a guide rod is installed through the middle of the swing plate, a repositioning frame is slidably installed on the guide rod, and an eccentric rod connected to the turntable is installed at the upper end of the repositioning frame.

[0007] The device is further configured such that a rear actuator and a front actuator are mounted on the lower end of the swing plate, and the rear actuator and the front actuator are respectively connected to the rear pressure block and the front pressure block.

[0008] The configuration is further defined as follows: a guide cylinder is installed above the stacking plate, the front pressure block and the rear pressure block are vertically slidably connected to the guide cylinder, and the bottom of the front pressure block and the rear pressure block extend into the stacking cavity and contact the top plate.

[0009] The following configuration is further provided: a second motor is installed at the lower center of the substrate, and a drive rod is connected to the output end of the second motor. The cross-section of the drive rod is square and it is vertically slidably connected to the substrate.

[0010] The material removal cylinder is further configured such that it is located on the upper end of the substrate and vertically aligned with each stacking cavity, and the top plate overlaps with the inner bottom of the stacking cavity.

[0011] A further configuration is provided: a detection plate is installed on one side of the guide cylinder, and a thickness sensor is embedded in the lower center of the detection plate.

[0012] The configuration is further defined as follows: each stacking plate is symmetrically equipped with a feed rod at the outer edge of each stacking cavity, and a pair of feed rods are used for feeding guidance of the stator core.

[0013] The present invention has the following beneficial effects:

[0014] 1. This invention addresses the problem of lamination misalignment or deformation caused by stress concentration during a single high-pressure process. It achieves a progressive lamination operation through a combination of initial and secondary lamination, further enhanced by a lifting action that works in conjunction with the lamination process to ensure precise positioning and forming of the generator stator core laminations. Ultimately, the combined action of these two processes enables rapid and efficient lamination of the generator stator core laminations, improving motor production efficiency. Furthermore, the added thickness detection process effectively inspects the finished product quality of the generator stator core laminations, allowing for selection between further lamination and final product discharge, thereby significantly improving lamination efficiency and finished product quality.

[0015] 2. In the double-overlapping operation, the generator stator laminations can undergo continuous double-overlapping, thus converting a single high-pressure impact into a double-overlapping process. This avoids stress concentration caused by a single high pressure, which could lead to lamination misalignment or deformation, and ensures the positioning accuracy between the generator stator laminations. During the initial and secondary overlapping operations, a lifting action is also performed simultaneously. That is, the entire overlapping plate is moved upward by the same top cylinder. Similar to downward pressurization, while being subjected to the initial and secondary overlapping, the upward movement of the overlapping plate as a whole shortens the starting stroke of the current overlapping operation, and the overlapping process of the generator stator laminations can be completed in a "pincer" manner. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 is a schematic diagram of the structure of the present invention;

[0018] Figure 2 is a bottom view of the present invention;

[0019] Figure 3 is a structural breakdown diagram of the step-by-step stacking assembly of the present invention;

[0020] Figure 4 is a split bottom view of the step-by-step stacking assembly of the present invention;

[0021] Figure 5 is a cross-sectional view of the step-by-step stacking assembly of the present invention;

[0022] Figure 6 is a structural diagram of the synchronous lifting assembly of the present invention;

[0023] Figure 7 is a diagram showing the operating status of the synchronous lifting component of the present invention;

[0024] Figure 8 is an overall cross-sectional view of the present invention;

[0025] Figure 9 is a flowchart of the stacking process of the present invention.

[0026] In the diagram: 1. Main frame; 2. Feed roller frame; 3. Stacking plate; 4. Guide cylinder; 5. Stacking chamber; 6. Motor 1; 7. Turntable; 8. Eccentric rod; 9. Transfer frame; 10. Swing plate; 11. Rear actuator rod; 12. Front actuator rod; 13. Rear pressure block; 14. Front pressure block; 15. Detection plate; 16. Top cylinder; 17. Base plate; 18. Unloading cylinder; 19. Motor 2; 20. Guide rod; 21. Feeding rod; 22. Top plate; 23. Drive rod. Detailed Implementation

[0027] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1

[0029] To address the problem of lamination misalignment or deformation caused by stress concentration under single high pressure, the following technical solution is proposed:

[0030] Referring to Figures 1-8, a large-capacity doubly-fed generator stator core stacking device in this embodiment includes a main frame 1 and a feed roller frame 2. A stacking plate 3 is vertically and movably installed on the far side of the feed of the main frame 1 and the feed roller frame 2. At least three stacking cavities 5 are opened on the stacking plate 3.

[0031] Specifically, taking three stacking cavities 5 as an example, the stacking cavity 5 corresponding to the feed roller frame 2 is called the preliminary stacking station. After rotating 120° according to the rotation direction of the stacking plate 3, the stacking cavity 5 is called the secondary stacking station. The generator stator iron chips are stacked continuously by the preliminary stacking station and the secondary stacking station.

[0032] A step-by-step stacking assembly is suspended above the stacking plate 3. The step-by-step stacking assembly includes a swing plate 10, a front pressure block 14, and a rear pressure block 13. The front pressure block 14 and the rear pressure block 13 are always vertically aligned with two of the stacking cavities 5. A motor 6 is installed above the swing plate 10. The output end of the motor 6 is connected to a turntable 7. A guide rod 20 is installed through the middle of the swing plate 10. A repositioning frame 9 is slidably installed on the guide rod 20. An eccentric rod 8 connected to the turntable 7 is installed at the upper end of the repositioning frame 9. A rear actuating rod 11 and a front actuating rod 12 are installed at the lower end of the swing plate 10. The rear actuating rod 11 and the front actuating rod 12 are connected to the rear pressure block 13 and the front pressure block 14, respectively.

[0033] Specifically, the generator stator iron chips are moved sequentially to the corresponding stacking chamber 5 (i.e., the preliminary stacking station) via the feed roller frame 2. After the chips have been moved according to the quantity, the feeding stops. At this time, the motor 6 starts and drives the swing plate 10 to swing through the turntable 7 and the eccentric rod 8. Meanwhile, the rear pressure block 13 and the front pressure block 14, which are located at the lower ends of the rear actuator rod 11 and the front actuator rod 12 respectively, perform a downward pressing action with a fixed stroke. During this process, the front actuator rod 12 drives the front pressure block 14 to complete the preliminary stacking of the generator stator iron chips in the preliminary stacking station.

[0034] Furthermore, the stacking plate 3 rotates, and the generator stator iron chips that have completed the initial stacking rotate to the secondary stacking station. At this time, the motor 6 continues to start, driving the rear actuator 11 and the rear pressure block 13 to perform a secondary stacking operation on the generator stator iron chips that have completed the initial stacking process in the secondary stacking station. During this process, the generator stator iron chips can receive continuous double stacking action, thereby converting a single high-pressure impact into a stacking process of two stacking impacts, avoiding the stress concentration phenomenon of a single high pressure that causes misalignment or deformation of the laminations, and ensuring the positioning accuracy between the generator stator iron chips.

[0035] A synchronous lifting assembly is also provided below the stacking plate 3. The synchronous lifting assembly includes a base plate 17 and a top plate 22. The top plate 22 is located at the bottom of the stacking cavity 5. A synchronous lifting cylinder 16 for driving the stacking plate 3 to move vertically is provided under the base plate 17. A stripping cylinder 18 for driving the top plate 22 to move vertically is provided on the base plate 17.

[0036] Specifically, during the initial and secondary stacking operations, a lifting action is also performed simultaneously. That is, the stacking plate 3 is moved upward by the cylinder 16. Similar to the downward pressurization, while being subjected to the initial and secondary stacking, the upward movement of the stacking plate 3 as a whole shortens the starting stroke of the current stacking operation and can complete the stacking processing of the generator stator iron ferrite in a "pincer attack" manner.

[0037] Basic principle: When using this invention, during the stacking process of generator stator iron chips, a progressive stacking operation is achieved through a combination of preliminary stacking and secondary stacking. Then, a lifting action is added in conjunction with the above stacking action to achieve the positioning and forming accuracy of the generator stator iron chips. Finally, the generator stator iron chips are quickly and effectively stacked under the combined action of the two actions, thereby improving the efficiency of motor production and processing.

[0038] Example 2

[0039] This embodiment is a structural optimization of the structure in Embodiment 1:

[0040] Referring to Figures 3-5, the system includes: a guide cylinder 4 installed above the stacking plate 3; a front pressure block 14 and a rear pressure block 13 that are vertically slidably connected to the guide cylinder 4; the bottoms of the front pressure block 14 and the rear pressure block 13 that extend into the stacking cavity 5 and contact the top plate 22; a detection plate 15 installed on one side of the guide cylinder 4; and a thickness sensor embedded in the lower middle part of the detection plate 15.

[0041] Specifically, the purpose of the guide cylinder 4 is to ensure the accuracy of the vertical movement of the front actuator 12 and the rear actuator 11 in driving the front pressure block 14 and the rear pressure block 13 respectively, so as to avoid uneven stacking caused by guide misalignment; the purpose of the thickness sensor is to detect the thickness of the stacked generator stator iron chip and compare it with the required thickness for processing to complete the finished product quality inspection.

[0042] Referring to Figures 6-8, a second motor 19 is installed at the lower center of the substrate 17. The output end of the second motor 19 is connected to a drive rod 23. The cross-section of the drive rod 23 is square and it is vertically slidably connected to the substrate 17.

[0043] Specifically, the square cross-section of the drive rod 23 is designed so that the stacking plate 3 can move vertically under the lifting action of the top cylinder 16, and when the stacking position is changed by the starting rotation of the second motor 19, the stacking plate 3 is driven to complete the follow-up rotation. The above-mentioned rotation and lifting actions do not interfere with each other and operate independently.

[0044] The unloading cylinder 18 is disposed on the upper end of the substrate 17 and vertically aligned with each stacking cavity 5, and the top plate 22 overlaps with the inner bottom of the stacking cavity 5;

[0045] Each stacking plate 3 is symmetrically equipped with a feed rod 21 at the outer edge of each stacking cavity 5. A pair of feed rods 21 are used for feeding guide of stator iron core. During feeding, the generator stator iron core moves to the surface of the stacking plate 3 through the feed roller frame 2 and is guided by the feed rods 21 to complete the accurate feeding into the stacking cavity 5.

[0046] Specifically, referring to Figures 6, 7, and 9, and still using three stacking cavities 5 for explanation, during the stacking operation of the generator stator iron chips, after the initial stacking and secondary stacking are completed consecutively, the stacked generator stator iron chips rotate to the last stacking cavity 5, which is below the detection plate 15. At this time, the thickness sensor embedded in the detection plate 15 will detect the thickness of the currently stacked generator stator iron chips and compare the measured thickness value with the required stacking thickness. If the required thickness is not met, then... Motor 2 19 drives the entire stacking plate 3 to rotate, causing the stacked generator stator iron chips to rotate to the initial stacking station, where the initial stacking and secondary stacking operations continue. After stacking, the thickness is checked until the required thickness is met, at which point the chip is discharged. If the required thickness is met, the unloading cylinder 18 is activated, which drives the top plate 22 to lift the generator stator iron chips upward. The finished product is removed using a robotic arm, and the stacking process for the next set of generator stator iron chips continues.

[0047] Structural advantages: The thickness detection process added in this embodiment can effectively detect the finished product quality of generator stator core lamination and make a choice between re-lamination and unloading, thereby effectively improving lamination efficiency and finished product quality; and the continuous preliminary lamination, secondary lamination and synchronous lifting actions complement each other, and together with the finished product quality detection steps, they constitute the stable lamination process of generator stator core chips.

[0048] Example 3

[0049] This embodiment combines the technical content of Embodiment 1 and Embodiment 2 to construct a process and principle for stacking stator cores of a large-capacity doubly-fed generator, including the following steps:

[0050] 1. Initial stacking: The generator stator iron chips are moved sequentially to the corresponding stacking chamber 5 (i.e., the initial stacking station) by the feed roller frame 2. After the number of chips has been moved, the feeding stops. At this time, the motor 6 starts and drives the swing plate 10 to swing through the turntable 7 and the eccentric rod 8. Meanwhile, the rear pressure block 13 and the front pressure block 14, which are located at the lower end of the rear execution rod 11 and the front execution rod 12 respectively, perform a downward pressing action with a fixed stroke. During this process, the front execution rod 12 drives the front pressure block 14 to complete the initial stacking of the generator stator iron chips in the initial stacking station.

[0051] Second: Secondary stacking. Further, the stacking plate 3 rotates, and the generator stator iron chips that have completed the initial stacking rotate to the secondary stacking station. At this time, the motor 6 continues to start, driving the rear actuator 11 and the rear pressure block 13 to perform a secondary stacking operation on the generator stator iron chips that have completed the initial stacking process in the secondary stacking station. During this process, the generator stator iron chips can receive continuous double stacking action, thereby converting a single high-pressure impact into a stacking process of two stacking impacts, avoiding the stress concentration phenomenon of a single high pressure that causes misalignment or deformation of the laminations, and ensuring the positioning accuracy between the generator stator iron chips.

[0052] Third: Synchronous lifting action. During the initial and secondary stacking actions, a lifting action is also performed simultaneously. That is, the stacking plate 3 is driven to move upward by the cylinder 16. Similar to the downward pressurization, while being subjected to the initial and secondary stacking, the upward movement of the stacking plate 3 as a whole shortens the starting stroke of the current stacking action and can complete the stacking processing of the generator stator iron ferrite in a "pincer attack" manner.

[0053] 4. After the initial and secondary stacking are completed, the stacked generator stator iron chips rotate to the last stacking chamber 5, which is below the detection plate 15. At this time, the thickness sensor embedded in the detection plate 15 will detect the thickness of the stacked generator stator iron chips and compare the measured thickness value with the required thickness for stacking. If the required thickness is not met, the second motor 19 is started, which drives the entire stacking plate 3 to rotate, so that the stacked generator stator iron chips rotate to the initial stacking position and continue the initial and secondary stacking operations. After stacking, the thickness detection continues until the required thickness is met and the chips are discharged. If the required thickness is met, the unloading cylinder 18 is started, which drives the top plate 22 to lift the generator stator iron chips upward to complete the discharge.

[0054] In summary, this invention achieves progressive stacking operation through a combination of preliminary and secondary stacking. This is further enhanced by a lifting action combined with the aforementioned stacking actions to ensure precise positioning and forming of the generator stator core. Ultimately, the combined action enables rapid and efficient stacking of the generator stator core, improving motor production efficiency. Furthermore, the added thickness detection process effectively inspects the finished product quality of the stacked generator stator core, allowing for selection between further stacking and unloading, thus significantly improving stacking efficiency and finished product quality. The continuous preliminary stacking, secondary stacking, and synchronous lifting actions complement each other, and together with the finished product quality inspection steps, constitute a stable stacking process for the generator stator core.

[0055] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not describe all details exhaustively, nor do they limit the invention to any specific implementation method.

Claims

1. A large-capacity doubly-fed generator stator core stacking device, comprising a main frame (1) and a feed roller frame (2), wherein a stacking plate (3) is provided on the far side of the feed of the main frame (1) and the feed roller frame (2), and the stacking plate (3) is provided with at least three stacking cavities (5), characterized in that: A step-by-step stacking assembly is suspended above the stacking plate (3), and a synchronous lifting and rotating assembly is arranged below the stacking plate (3); the step-by-step stacking assembly includes a motor (6), a turntable (7), an eccentric rod (8), a repositioning frame (9), a guide rod (20), a swing plate (10), a front actuator rod (12), a rear actuator rod (11), a front pressure block (14), and a rear pressure block (13); the output end of the motor (6) is fixedly connected to the turntable (7), and the turntable (7) is hinged to the repositioning frame (9) through the eccentric rod (8). The repositioning frame (9) is slidably mounted on the guide rod (20), which is vertically fixed through the middle of the swing plate (10). The lower end of the swing plate (10) is fixedly mounted with a front actuator rod (12) and a rear actuator rod (11). The lower end of the front actuator rod (12) is fixedly connected to the front pressure block (14), and the lower end of the rear actuator rod (11) is fixedly connected to the rear pressure block (13). The front pressure block (14) and the rear pressure block (13) are always vertically aligned with the two stacking cavities (5) on the stacking plate (3) for synchronization. The stator core laminations in the two stacking cavities (5) are subjected to a progressive pressurization operation of initial stacking and secondary stacking; the synchronous lifting and indexing assembly includes a second motor (19), a drive rod (23), a base plate (17), a top cylinder (16), a stripping cylinder (18), and a top plate (22); the output end of the second motor (19) is fixedly connected to the drive rod (23), the cross-section of the drive rod (23) is square, the drive rod (23) is vertically slidably connected to the base plate (17), and the base plate (17) is fixedly connected to the stacking plate (3). The output end of the top cylinder (16) is fixedly connected to the lower end face of the substrate (17) and is used to drive the substrate (17) and the stacking plate (3) to move vertically as a whole. During the stacking operation, it forms a bidirectional pressure with the front pressure block (14) and the rear pressure block (13) to clamp from above and below. The stripping cylinder (18) is fixedly installed on the upper end face of the substrate (17). The output end of the stripping cylinder (18) is fixedly connected to the top plate (22). The top plate (22) is located at the bottom of the stacking cavity (5) and is used to push the stator core out of the stacking cavity (5) after the stacking is completed.

2. The large-capacity doubly-fed generator stator core stacking equipment according to claim 1, characterized in that, A guide cylinder (4) is fixedly installed above the stacking plate (3). The front pressure block (14) and the rear pressure block (13) are vertically slidably connected to the guide cylinder (4). The bottom of the front pressure block (14) and the rear pressure block (13) can extend into the stacking cavity (5) and contact the top plate (22).

3. The large-capacity doubly-fed generator stator core stacking device according to claim 2, characterized in that, A detection plate (15) is fixedly installed on one side of the guide cylinder (4). A thickness sensor is embedded in the middle of the lower end of the detection plate (15). The thickness sensor is vertically aligned with the stacking cavity (5) and is used to detect the thickness of the stator core after stacking.

4. The large-capacity doubly-fed generator stator core stacking device according to claim 3, characterized in that, The stacking plate (3) is symmetrically equipped with a pair of feed rods (21) at the outer edge of each stacking cavity (5). The feed rods (21) extend along the axial direction of the stacking cavity (5) and are used for feeding guidance of stator core laminations.

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