A stator oil hole detection device and method based on gas flow rate variation

Abstract

This invention discloses a stator oil hole detection device and method based on airflow variation, aiming to provide an efficient, accurate, and reliable device and method for detecting stator oil holes based on airflow variation. The key technical features include a worktable, with an oil hole detection device positioned above the worktable and a conveying device below for transporting the stator to be inspected to the detection position. The oil hole detection device includes a rotating bracket mounted on the worktable, detection components symmetrically distributed at both ends of the rotating bracket, a driving component for rotating the rotating bracket, clamping cylinders evenly and symmetrically distributed in four directions on the rotating bracket, and air pressure detection components mounted on each clamping cylinder. The detection components include a guide plate mounted on the rotating bracket and several pins evenly distributed on the guide plate. The rotating bracket has displacement grooves that allow the pins to synchronously insert into the oil holes. This invention is applicable to the field of stator oil hole detection technology.

Description

Technical Field

[0001] This invention relates to the field of stator oil hole detection technology, and more specifically, to a stator oil hole detection device and method based on changes in air flow rate. Background Technology

[0002] In industries such as motor manufacturing, the stator is a crucial component of the motor, and the quality of its oil holes directly affects the motor's performance and lifespan. The stator oil holes play a vital role, ensuring proper lubrication and heat dissipation during motor operation, thereby guaranteeing stable and efficient motor performance.

[0003] Currently, methods for detecting stator oil holes have many shortcomings. Traditional methods mostly rely on manual operation, which is not only inefficient but also highly susceptible to human error in terms of accuracy and reliability, making it difficult to meet the needs of large-scale production. While some existing automated testing equipment has improved efficiency to some extent, it still has deficiencies in terms of accuracy and adaptability to complex situations. For example, existing equipment may not be able to accurately detect minute blockages or oil holes with small dimensional deviations; moreover, these devices are easily affected by external factors during the testing process, leading to inaccurate data and impacting product quality assessment. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a high-efficiency, accurate and reliable stator oil hole detection device and detection method based on gas flow rate changes.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a stator oil hole detection device based on airflow variation, comprising a worktable, an oil hole detection device above the worktable and a conveying device below for conveying the stator to be inspected to the detection position, the oil hole detection device comprising a rotating bracket disposed on the worktable, detection components symmetrically distributed at both ends of the rotating bracket, a driving component for driving the rotating bracket to rotate, clamping cylinders uniformly and symmetrically distributed in four directions of the rotating bracket, and air pressure detection components disposed on each clamping cylinder, the detection components comprising a guide plate disposed on the rotating bracket and a plurality of pins uniformly distributed on the guide plate, the rotating bracket being provided with a displacement groove for synchronously inserting each pin into the oil hole, and each pin being provided with an air jet unit for conveying high-pressure air into the oil hole.

[0006] The present invention is further configured such that: the jet unit includes an air inlet disposed at the end of the pin, an air passage disposed inside the pin, and an air outlet disposed at a position perpendicular to the oil hole of the pin.

[0007] The present invention is further configured such that: the conveying device includes a loading point, two parallel conveying tracks for conveying the stator to be tested, a driving component for moving the stator to be tested, a tray disposed below the loading point, a first cylinder for controlling the lifting and lowering of the tray, a plurality of claws penetrating the tray and used to abut against the inner wall of the stator to be tested, and a second cylinder for controlling the extension and retraction of the claws.

[0008] The present invention is further configured such that: the driving component includes a gear disposed on one side of the bottom of the rotating bracket, a rack and pinion slide disposed on the worktable and meshing with the gear, a third cylinder for driving the rack and pinion slide to move, and a limiting cover plate disposed on the bottom surface of the rotating bracket. When the third cylinder drives the rack and pinion slide to move, it drives the rotating bracket to rotate, causing the pin to be inserted into the oil hole.

[0009] The present invention is further configured such that a rubber gasket is provided between the clamping cylinder and the contact surface of the stator to be tested to prevent gas from overflowing during testing and affecting the test data.

[0010] This application also provides a control method for a stator oil hole detection device based on electrode induction, characterized by comprising the following steps:

[0011] S1. Initial Conveying and Positioning: The drive unit of the conveying device transports the stator to be tested along the conveying track to the loading point;

[0012] S2. Move to the detection point: The first cylinder drives the tray to rise to the bottom of the stator to be tested, and the second cylinder drives each jaw to rise to the central cavity of the stator to be tested, and makes the jaws extend and abut against the inner wall of the central cavity, raising the stator to be tested to the monitoring area. The pressure value is fed back in real time by the pressure sensor built into the jaw. When the pressure reaches the preset threshold, the second cylinder is controlled to stop, realizing the centering and clamping of the inner wall of the stator, and avoiding the stator displacement during the testing process.

[0013] S3. Stator fixing: The clamping cylinders in four directions of the rotating bracket extend synchronously, and the clamping end gradually approaches the middle of the outer wall of the stator. During the approach process, the speed gradually slows down to avoid impacting the stator. The clamping cylinders are tightly connected to the stator to be tested through the set ring rubber to ensure the accuracy of the data.

[0014] S4. Stator oil hole detection: The third cylinder continues to extend, the rack slide drives the gear to rotate, the rotating bracket rotates synchronously with the gear, and several pins on the guide plates at both ends of the rotating bracket move synchronously along the displacement groove of the rotating bracket, so that the pin outlet is located above the stator oil hole.

[0015] S41. After the pin is in place, the jet unit is turned on to detect the four detection areas. The high-pressure air source enters the air channel through the air inlet at the end of the pin and is injected into the oil hole through the air outlet of the pin. The air pressure detection device collects the air pressure value F in the oil hole in real time, continuously collects for 500ms and records the stable air pressure value, and filters the collected data to remove interference signals, records the stable air pressure value, and presets the standard air pressure value S.

[0016] When F ≥ S, the product passes the inspection.

[0017] When F < S, the product fails the inspection, and the defective area is inspected separately.

[0018] The jetting units within the non-compliant area are activated sequentially. The air pressure detection device continuously collects the air pressure value P within the oil hole for 500ms, recording the stable air pressure value. The collected data is filtered to remove interference signals, and the stable air pressure value is recorded. Simultaneously, within the first 100ms after jetting begins, the rate of change of air pressure ΔP1 is calculated; within 300-500ms of jetting, the stable rate of change of air pressure ΔP2 is calculated. The preset standard air pressure range for qualified oil holes is 0.4-0.6 MPa. ΔP1 is the average rate of change of air pressure obtained from multiple tests of normal oil holes.

[0019] If 0.4≤P≤0.6, and |ΔP1-ΔP1standard|≤0.05Mpa / 100ms, and |ΔP2|≤0.01Mpa / 200ms, the oil hole is judged to be unblocked and the size is qualified.

[0020] If P < 0.4, or ΔP1 < ΔP1 standard - 0.05 MPa / 100 ms, or if the air pressure value fluctuates abnormally during the jetting process (such as a sudden drop), the oil hole is determined to be blocked and the oil hole is marked.

[0021] If P > 0.6, or ΔP1 > ΔP1 standard + 0.05 MPa / 100 ms, or ΔP2 > 0.01 MPa / 200 ms, then the oil hole size is determined to be too large or there is a leak, and the oil hole is marked.

[0022] S42. Processing of test results: Products that pass the test are sent to the qualified product area along the conveying pipeline. Oil holes marked on unqualified products are manually inspected and the above judgment is repeated. If the product still fails the test, it is sent to the unqualified product area. The detailed test data and maintenance records of the product are stored in the database for subsequent analysis and improvement of the production process.

[0023] The beneficial effects of this invention are:

[0024] 1. The device features an oil hole detection unit at the top and a conveying unit at the bottom. Working in tandem, they achieve efficient integration of stator transport and inspection. The conveying unit continuously transports the stator to the inspection position, while the oil hole detection unit quickly inspects the stator's oil holes. Symmetrically distributed inspection components at both ends of the rotating bracket allow simultaneous inspection of both the upper and lower parts of the stator during a single rotation, significantly improving inspection efficiency. Clamping cylinders evenly and symmetrically distributed in four directions on the rotating bracket ensure stable clamping of the stator during inspection. The guide plate ensures accurate alignment of the pin with the stator's oil hole, and the jet unit within the pin delivers high-pressure air into the oil hole. Air pressure detection elements monitor changes in airflow; any blockage or damage to the oil hole will cause abnormal changes in airflow, enabling precise detection of stator oil hole defects.

[0025] 2. The jet unit accurately delivers high-pressure air to the stator oil holes. The air inlet is located at the end of the pin for stable high-pressure air introduction. The air channel is located inside the pin, providing a smooth transmission path for the air. The air outlet is positioned perpendicular to the pin and the oil hole, allowing high-pressure air to enter the oil hole directly and accurately. The feeding point, conveying track, and drive unit of the conveying device work together to automate the feeding of the stator to be tested. The drive unit can drive the stator to be tested to move stably on the conveying track, accurately delivering the stator to the testing position. The first cylinder controls the lifting and lowering of the tray, facilitating the adjustment of the stator's height. The grippers penetrate the tray and abut against the inner wall of the stator to be tested. The second cylinder controls the extension and retraction of the grippers, allowing for flexible adjustment according to the inner diameter of the stator, ensuring that the stator is firmly fixed during conveying and testing, thus improving the versatility and adaptability of the conveying device.

[0026] 3. The meshing design of the gear and rack slide plate in the drive assembly provides a precise and stable transmission method for the rotation of the rotating bracket. When the third cylinder drives the rack slide plate to move, the gear engagement precisely drives the rotating bracket to rotate, ensuring the pin is accurately positioned above the stator oil hole. This precise transmission mechanism ensures efficient execution of the testing action, avoiding misalignment of the pin and oil hole due to transmission errors, greatly improving the success rate and efficiency of the test. The limiting cover plate on the bottom surface of the rotating bracket plays an important limiting role. During the rotation of the rotating bracket, the limiting cover plate restricts its rotation range, preventing over-rotation or under-rotation. The rubber gasket between the clamping cylinder and the contact surface of the stator to be tested has good sealing performance. During the test, the rubber gasket can tightly adhere to the stator surface, effectively preventing high-pressure air from leaking out from the contact point between the stator and the clamping cylinder.

[0027] 4. Regarding inspection efficiency, the initial conveying and positioning step utilizes the drive components of the conveying device to quickly reach the loading point along the conveying track, achieving automated and efficient flow. When moving to the inspection point, the first and second cylinders, in conjunction with the grippers, precisely center and clamp the stator based on pressure sensor feedback, avoiding offset and repeated adjustments, saving significant time. In terms of inspection accuracy, stator oil hole inspection is performed in two steps. During the initial inspection, the air jet unit simultaneously inspects four areas, collecting and filtering stable air pressure values, comparing them with preset standards to quickly screen problematic products. Unqualified areas are inspected separately, calculating the air pressure change rate, and comparing multiple parameters to accurately determine oil hole defects, promptly identifying minor issues and ensuring product quality. Regarding stator protection, during the stator fixing step, the clamping cylinders extend synchronously and decelerate as they approach the stator to avoid impact damage. Rubber gaskets seal to prevent gas leakage, ensuring accurate and reliable data. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0029] Figure 2 A three-dimensional structural diagram of the oil hole detection device;

[0030] Figure 3 This is a magnified view of point A;

[0031] Figure 4 This is a schematic diagram of the internal structure of the latch;

[0032] Figure 5 A flowchart illustrating an embodiment of a stator oil hole detection device and method based on changes in air flow rate;

[0033] Figure 1-5 Reference numerals: 1. Workbench; 2. Rotating support; 3. Limiting cover; 4. Guide plate; 5. Pin; 6. Displacement groove; 7. Air inlet; 8. Air passage; 9. Air outlet; 10. Conveying track; 11. Driving component; 12. Tray; 13. First cylinder; 14. Second cylinder; 15. Gear; 16. Rack and pinion slide; 17. Third cylinder. Detailed Implementation

[0034] Reference Figure 1-5 The embodiments of the present invention will be further described below.

[0035] For ease of explanation, spatial relative terms such as “up,” “down,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “down” of other elements or features would be positioned “up” of those other elements or features. Therefore, the exemplary term “down” can encompass both up and down orientations. The device may be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0036] Moreover, relational terms such as “first” and “second” are used merely to distinguish one component from another that has the same name, without necessarily requiring or implying any such actual relationship or order between the components.

[0037] Figures 1 to 5 The device for detecting stator oil holes based on changes in airflow is shown. It includes a worktable, with an oil hole detection device positioned above the worktable and a conveying device below for transporting the stator to be inspected to the inspection position. These two devices work together to achieve efficient connection between stator transport and inspection. The conveying device continuously transports the stator to the inspection position, while the oil hole detection device quickly detects the stator oil holes. The oil hole detection device includes a rotating bracket mounted on the worktable, detection components symmetrically distributed at both ends of the rotating bracket, a drive component for rotating the rotating bracket, clamping cylinders evenly and symmetrically distributed in four directions on the rotating bracket, and air pressure detection components mounted on each clamping cylinder. The symmetrically distributed detection components at both ends of the rotating bracket allow for simultaneous inspection of both the upper and lower parts of the stator during a single rotation, significantly improving inspection efficiency. Clamping cylinders, evenly and symmetrically distributed in four directions on the rotating bracket, ensure the stator is stably clamped during testing. The testing assembly includes a guide plate on the rotating bracket and several pins evenly distributed on the guide plate. The guide plate ensures the pins are accurately aligned with the stator oil holes, and the jetting unit inside the pins delivers high-pressure air into the oil holes. The rotating bracket is equipped with displacement grooves that allow the pins to insert into the oil holes synchronously. Each pin contains a jetting unit for delivering high-pressure air into the oil hole. Air flow changes are monitored by an air pressure detection device. If there are problems such as blockage or damage in the oil holes, the air flow will change abnormally, thus enabling accurate detection of defects in the stator oil holes.

[0038] The jet unit includes an air inlet located at the end of the pin, an air passage located inside the pin, and an air outlet located at a position perpendicular to the oil hole. It can accurately deliver high-pressure air to the stator oil hole. The air inlet is located at the end of the pin to facilitate the stable introduction of high-pressure air. The air passage is located inside the pin to provide a smooth transmission path for the air. The air outlet is located at a position perpendicular to the oil hole, which allows high-pressure air to enter the oil hole directly and accurately.

[0039] The conveying device includes a loading point, two parallel conveying tracks for transporting the stator to be tested, a drive unit for moving the stator, a tray positioned below the loading point, a first cylinder for controlling the lifting and lowering of the tray, several claws penetrating the tray and contacting the inner wall of the stator, and a second cylinder for controlling the extension and retraction of the claws. This achieves automated loading of the stator, and the drive unit enables the stator to move stably on the conveying tracks, accurately transporting it to the testing position. The first cylinder controls the lifting and lowering of the tray, facilitating adjustment of the stator's height. The claws penetrate the tray and contact the inner wall of the stator. The second cylinder controls the extension and retraction of the claws, allowing for flexible adjustment according to the stator's inner diameter, ensuring the stator is firmly fixed during transport and testing, thus improving the versatility and adaptability of the conveying device.

[0040] The drive assembly includes a gear located on one side of the bottom of the rotating bracket, a rack and pinion slide plate mounted on the worktable and meshing with the gear, a third cylinder driving the rack and pinion slide plate to move, and a limiting cover plate located on the bottom surface of the rotating bracket. The meshing design of the gear and rack and pinion slide plate provides a precise and stable transmission method for the rotation of the rotating bracket. When the third cylinder drives the rack and pinion slide plate to move, the gear engagement precisely drives the rotating bracket to rotate, ensuring that the pin is accurately positioned above the stator oil hole. This precise transmission mechanism ensures efficient execution of the testing action, avoiding the problem of inaccurate alignment between the pin and the oil hole due to transmission errors, greatly improving the success rate and efficiency of the testing. The limiting cover plate on the bottom surface of the rotating bracket plays an important limiting role. During the rotation of the rotating bracket, the limiting cover plate restricts its rotation range, preventing over-rotation or under-rotation.

[0041] A rubber gasket is provided between the clamping cylinder and the contact surface of the stator to be tested, which has good sealing performance. During the testing process, the rubber gasket can fit tightly against the surface of the stator, effectively preventing high-pressure air from leaking out from the contact point between the stator and the clamping cylinder.

[0042] This application also provides a control method for a stator oil hole detection device based on electrode induction, comprising the following steps:

[0043] S1. Initial Conveying and Positioning: The drive unit of the conveying device transports the stator to be tested along the conveying track to the loading point;

[0044] S2. Move to the detection point: The first cylinder drives the tray to rise to the bottom of the stator to be tested, and the second cylinder drives each jaw to rise to the central cavity of the stator to be tested, and makes the jaws extend and abut against the inner wall of the central cavity, raising the stator to be tested to the monitoring area. The pressure value is fed back in real time by the pressure sensor built into the jaw. When the pressure reaches the preset threshold, the second cylinder is controlled to stop, realizing the centering and clamping of the inner wall of the stator, and avoiding the stator displacement during the testing process.

[0045] S3. Stator fixing: The clamping cylinders in four directions of the rotating bracket extend synchronously, and the clamping end gradually approaches the middle of the outer wall of the stator. During the approach process, the speed gradually slows down to avoid impacting the stator. The clamping cylinders are tightly connected to the stator to be tested through the set ring rubber to ensure the accuracy of the data.

[0046] S4. Stator oil hole detection: The third cylinder continues to extend, the rack slide drives the gear to rotate, the rotating bracket rotates synchronously with the gear, and several pins on the guide plates at both ends of the rotating bracket move synchronously along the displacement groove of the rotating bracket, so that the pin outlet is located above the stator oil hole.

[0047] S41. After the pin is in place, the jet unit is turned on to detect the four detection areas. The high-pressure air source enters the air channel through the air inlet at the end of the pin and is injected into the oil hole through the air outlet of the pin. The air pressure detection device collects the air pressure value F in the oil hole in real time, continuously collects for 500ms and records the stable air pressure value, and filters the collected data to remove interference signals, records the stable air pressure value, and presets the standard air pressure value S.

[0048] When F ≥ S, the product passes the inspection.

[0049] When F < S, the product fails the inspection, and the defective area is inspected separately.

[0050] The jetting units within the non-compliant area are activated sequentially. The air pressure detection device continuously collects the air pressure value P within the oil hole for 500ms, recording the stable air pressure value. The collected data is filtered to remove interference signals, and the stable air pressure value is recorded. Simultaneously, within the first 100ms after jetting begins, the rate of change of air pressure ΔP1 is calculated; within 300-500ms of jetting, the stable rate of change of air pressure ΔP2 is calculated. The preset standard air pressure range for qualified oil holes is 0.4-0.6 MPa. ΔP1 is the average rate of change of air pressure obtained from multiple tests of normal oil holes.

[0051] If 0.4≤P≤0.6, and |ΔP1-ΔP1standard|≤0.05Mpa / 100ms, and |ΔP2|≤0.01Mpa / 200ms, the oil hole is judged to be unblocked and the size is qualified.

[0052] If P < 0.4, or ΔP1 < ΔP1 standard - 0.05 MPa / 100 ms, or if the air pressure value fluctuates abnormally during the jetting process (such as a sudden drop), the oil hole is determined to be blocked and the oil hole is marked.

[0053] If P > 0.6, or ΔP1 > ΔP1 standard + 0.05 MPa / 100 ms, or ΔP2 > 0.01 MPa / 200 ms, then the oil hole size is determined to be too large or there is a leak, and the oil hole is marked.

[0054] S42. Processing of test results: Products that pass the test are sent to the qualified product area along the conveying pipeline. Oil holes marked on unqualified products are manually inspected and the above judgment is repeated. If the product still fails the test, it is sent to the unqualified product area. The detailed test data and maintenance records of the product are stored in the database for subsequent analysis and improvement of the production process.

[0055] In terms of inspection efficiency, the initial conveying and positioning step utilizes the drive components of the conveying device to quickly reach the loading point along the conveying track, achieving automated and efficient flow. When moving to the inspection point, the first and second cylinders, in conjunction with the grippers, precisely center and clamp the stator based on pressure sensor feedback, avoiding offset and repeated adjustments, saving significant time. Regarding inspection accuracy, stator oil hole inspection is performed in two steps. During the initial inspection, the air jet unit simultaneously inspects four areas, collecting and filtering stable air pressure values, comparing them with preset standards to quickly screen problematic products. Unqualified areas are inspected separately, calculating the air pressure change rate, and comparing multiple parameters to accurately determine oil hole defects, promptly identifying minor issues and ensuring product quality. For stator protection, during the stator fixing step, the clamping cylinders extend synchronously and decelerate as they approach the stator to avoid impact damage. Rubber gaskets seal to prevent gas leakage, ensuring accurate and reliable data.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included within the protection scope of the present invention.

Claims

1. A stator oil hole detection device based on gas flow rate variation, comprising a worktable (1), characterized in that, The workbench (1) is equipped with an oil hole detection device above and a conveying device for conveying the stator to be inspected to the detection position below. The oil hole detection device includes a rotating bracket (2) set on the workbench (1), detection components symmetrically distributed at both ends of the rotating bracket (2), a driving component for driving the rotating bracket (2) to rotate, clamping cylinders evenly and symmetrically distributed in four directions of the rotating bracket (2), and air pressure detection components set on each clamping cylinder. The detection component includes a guide plate (4) set on the rotating bracket (2) and several pins (5) evenly distributed on the guide plate (4). The rotating bracket (2) is provided with a displacement groove (6) that allows each pin (5) to move synchronously and insert into the oil hole. Each pin (5) is provided with a jet unit for conveying high-pressure air into the oil hole. The jet unit includes an air inlet (7) located at the end of the pin (5), an air passage (8) located inside the pin (5), and an air outlet (9) located at a position perpendicular to the oil hole in the pin (5). The drive assembly includes a gear (15) disposed on one side of the bottom of the rotating bracket (2), a rack slide plate (16) disposed on the worktable (1) and meshing with the gear (15), a third cylinder (17) for driving the rack slide plate (16) to move, and a limiting cover plate (3) disposed on the bottom surface of the rotating bracket (2). When the third cylinder (17) drives the rack slide plate (16) to move, it drives the rotating bracket (2) to rotate, causing the pin (5) to be inserted into the oil hole.

2. The stator oil hole detection device based on gas flow rate variation according to claim 1, characterized in that, The conveying device includes a loading point, two parallel conveying tracks (10) for conveying the stator to be tested, a drive unit (11) for moving the stator to be tested, a tray (12) set below the loading point, a first cylinder (13) for controlling the lifting and lowering of the tray (12), several claws that penetrate the tray (12) and are used to abut against the inner wall of the stator to be tested, and a second cylinder (14) for controlling the extension and retraction of the claws.

3. The stator oil hole detection device based on gas flow rate variation according to claim 1, characterized in that, A rubber gasket is provided between the clamping cylinder and the contact surface of the stator to be tested to prevent gas from overflowing during testing and affecting the test data.

4. A stator oil hole detection device based on gas flow rate variation according to any one of claims 1-3, characterized in that, Includes the following steps: S1. Initial conveying and positioning: The drive unit (11) of the conveying device conveys the stator to be tested along the conveying track (10) to the loading point; S2, Move to the detection point: The first cylinder (13) drives the tray (12) to rise to the bottom of the stator to be tested, and the second cylinder (14) drives each claw to rise to the central cavity of the stator to be tested, and makes the claws extend and abut against the inner wall of the central cavity, raising the stator to be tested to the monitoring area. The pressure value is fed back in real time by the pressure sensor built into the claw. When the pressure reaches the preset threshold, the second cylinder (14) is controlled to stop, realizing the centering and clamping of the inner wall of the stator, and avoiding the stator displacement during the testing process; S3, Stator fixing: The clamping cylinders in the four directions of the rotating bracket (2) extend synchronously, and the clamping end gradually approaches the middle of the outer wall of the stator. During the approach process, the speed gradually slows down to avoid impacting the stator, so that the clamping cylinder and the stator to be tested are tightly connected through the set ring rubber to ensure the accuracy of the data. S4, Stator oil hole detection: The third cylinder (17) continues to extend, the rack slide (16) drives the gear to rotate, the rotating bracket (2) rotates synchronously with the gear (15), and several pins (5) on the guide discs (4) at both ends of the rotating bracket (2) move synchronously along the displacement groove (6) of the rotating bracket (2), so that the air outlet (9) of the pin (5) is located above the stator oil hole; S41. After the pin (5) is in place, the jet unit is turned on to detect the four detection areas. The high-pressure air source enters the air channel (8) through the air inlet (7) at the end of the pin (5) and is injected into the oil hole through the air outlet (9) of the pin (5). The air pressure detection device collects the air pressure value F in the oil hole in real time, continuously collects for 500ms and records the stable air pressure value, and filters the collected data to remove interference signals, records the stable air pressure value, and presets the standard air pressure value S. When F ≥ S, the product passes the inspection. When F < S, the product fails the inspection, and the defective area is inspected separately. The jetting units within the non-compliant area are activated sequentially. The air pressure detection device continuously collects the air pressure value P within the oil hole for 500ms, recording the stable air pressure value. The collected data is filtered to remove interference signals, and the stable air pressure value is recorded. Simultaneously, within the first 100ms after jetting begins, the rate of change of air pressure ΔP1 is calculated; within 300-500ms of jetting, the stable rate of change of air pressure ΔP2 is calculated. The preset standard air pressure range for qualified oil holes is 0.4-0.6 MPa. ΔP1 is the average rate of change of air pressure obtained from multiple tests of normal oil holes. If 0.4≤P≤0.6, and |ΔP1-ΔP1standard|≤0.05Mpa / 100ms, and |ΔP2|≤0.01Mpa / 200ms, the oil hole is judged to be unblocked and the size is qualified. If P < 0.4, or ΔP1 < ΔP1 standard - 0.05 MPa / 100 ms, or if the air pressure value fluctuates abnormally during the jetting process, the oil hole is determined to be blocked and the oil hole is marked. If P > 0.6, or ΔP1 > ΔP1 standard + 0.05 MPa / 100 ms, or ΔP2 > 0.01 MPa / 200 ms, then the oil hole size is determined to be too large or there is a leak, and the oil hole is marked. S42. Processing of test results: Products that pass the test are sent to the qualified product area along the conveying pipeline. Oil holes marked on unqualified products are manually inspected and the above judgment is repeated. If the product still fails the test, it is sent to the unqualified product area. The detailed test data and maintenance records of the product are stored in the database for subsequent analysis and improvement of the production process.

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