A device for detecting waterproof performance of plastic-sealed motor rotor

Abstract

The present invention discloses a device for detecting the waterproof performance of a plastic-sealed motor rotor, which relates to the technical field of waterproof detection equipment. The device comprises a cabinet body, a hydraulic rod is fixedly installed on the top of the cabinet body, a telescopic end of the hydraulic rod is fixedly connected to a lifting plate, an upper mold base and a lower mold base are fixedly connected to the bottom of the lifting plate and a workbench of the cabinet body respectively, a pressure sensor is installed on the lifting plate, a pump is installed inside the cabinet body, and two waterproof testing mechanisms are also included. The waterproof testing mechanism comprises a sleeve, an annular part is movably connected to the inside of the sleeve, a first spring is provided between the sleeve and the annular part, and a water inlet hole is provided on one side of the annular part and the sleeve, so as to realize local waterproof performance detection of the welding point of the rotor shell and find out the specific leakage point position on the welding point so as to improve the production process in time. The local position on the welding point can also be pressurized separately to test the waterproof performance of different positions on the welding point, so as to make the detection result more refined.

Description

Technical Field

[0001] The present invention relates to the technical field of airtightness detection equipment, and in particular to a device for detecting the waterproof performance of a plastic-sealed motor rotor. Background Art

[0002] A plastic-encapsulated motor is a motor that uses plastic packaging technology. It mainly encapsulates the motor's stator core, windings and other components with engineering plastics to improve the motor's protection, insulation and stability. Since water ingress into the motor rotor will cause the insulation performance between the windings or between the windings and the core to deteriorate, and electrochemical corrosion is prone to occur, seriously shortening the motor's service life, the motor rotor needs to be specially tested for waterproof performance before leaving the factory.

[0003] A waterproof rotor is usually wrapped in a shell on the outside, which seals the internal parts to achieve a waterproof effect. Methods for testing the waterproof performance of the rotor include hydrostatic pressure testing, immersion testing, and gas leak detection. The principle of the hydrostatic pressure testing method is to place the rotor in a sealed chamber, inject water into the chamber and pressurize it. When water enters the rotor, the pressure inside the chamber will change, and the waterproof performance of the rotor will be reflected by the pressure change.

[0004] The outer shell of the rotor is usually cast in one piece, and both ends of the rotor shaft need to pass through the shell and be fixed to the shell by welding. Since the welding process will produce problems such as air holes, slag inclusions and incomplete welding, when the rotor leaks, the water inlet position is generally located at the welding surface of the shell, and this position is also the main test position for the rotor waterproof performance detection. Traditional waterproof performance detection equipment can only detect the waterproof performance of the rotor through the pressure change inside the chamber, and cannot detect the specific location of the leakage point on the welding surface of the rotor shell. Therefore, the production process cannot be improved in time to improve the product qualification rate. For this reason, a waterproof performance detection device is needed that can detect the waterproof performance of the rotor as a whole and find the specific location of the leakage point on the rotor welding surface. Summary of the Invention

[0005] The purpose of the present invention is to propose a device for detecting the waterproof performance of a plastic-encapsulated motor rotor in order to solve the problem that traditional waterproof performance detection equipment can only detect the waterproof performance of the rotor through the pressure change inside the chamber, but cannot detect the specific location of the leakage point on the welding surface of the rotor shell, and therefore cannot improve the production process in time to improve the product qualification rate.

[0006] To achieve the above objectives, the present invention adopts the following technology: a device for detecting the waterproof performance of a plastic-encapsulated motor rotor: comprising a cabinet, a hydraulic rod fixedly mounted on the top of the cabinet, a lifting plate fixedly connected to the telescopic end of the hydraulic rod, an upper die base and a lower die base fixedly connected to the bottom of the lifting plate and the workbench of the cabinet, respectively, a pressure sensor mounted on the lifting plate, a pump mounted inside the cabinet, and further comprising:

[0007] Two waterproof testing mechanisms, each comprising a sleeve, an annular member movably connected thereto, a first spring disposed between the sleeve and the annular member, a water inlet hole formed on one side of each of the annular member and the sleeve, and a protrusion fixedly connected to one side of the annular member and embedded in the water inlet hole of the sleeve;

[0008] The lower transmission assembly and the upper transmission assembly are used to drive the two waterproof test mechanisms respectively, the fixing assembly is used to lock the rotor when the lower mold base and the upper mold base are closed, and the water supply mechanism;

[0009] When the annular member abuts against the rotor housing, the water inlet hole on the annular member is located at the welding point between the rotor housing and the rotating shaft. The waterproof performance of the welding point is tested by injecting water into the water inlet hole, and the testing position is switched when the annular member rotates.

[0010] As a further description of the above-mentioned technology, a device for detecting the waterproof performance of a plastic-encapsulated motor rotor is provided: the fixing assembly includes a fixing frame fixedly connected to the interior of the upper mold base, the bottom of the fixing frame is rotatably connected to gear 2, the interior of gear 2 is slidably connected to a reducer, the inner diameter of the reducer gradually decreases from bottom to top, a support spring is provided between gear 2 and the reducer, after the lower mold base and the upper mold base are closed, the top end of the rotor shaft is inserted into the reducer and the reducer moves upward, at this time the support spring is stretched, and the rotor shaft and the reducer are fixed under the action of friction.

[0011] As a further description of the above-mentioned technology, a device for detecting the waterproof performance of a plastic-encapsulated motor rotor is provided: the lower transmission assembly includes a lower motor and an electric telescopic rod fixedly installed inside the lower mold base, the drive shaft of the lower motor is fixedly connected to the lower gear, the telescopic end of the electric telescopic rod is rotatably connected to a lower connecting tube fixed to the sleeve, and the outer portion of the lower connecting tube is slidably connected to a lower gear ring that meshes with the lower gear and is rotatably connected to the inside of the lower mold base.

[0012] As a further description of the above-mentioned technology, a device for detecting the waterproof performance of a plastic-encapsulated motor rotor is provided: the upper transmission assembly includes an upper motor fixedly mounted inside the upper mold base, the drive shaft of the upper motor is fixedly connected to the upper gear, the interior of the upper mold base is rotatably connected to an upper connecting tube fixed to the sleeve, and the exterior of the upper connecting tube is fixedly connected to an upper gear ring meshing with the upper gear and rotatably connected to the interior of the upper mold base.

[0013] As a further description of the above-mentioned technology, a device for detecting the waterproof performance of a plastic-encapsulated motor rotor is provided: a sealing unit is provided inside the sleeve, and the sealing unit includes a sealing ring 1 fixed to one end of an annular member, and the other end of the annular member is fixedly connected to a sealing ring 2, and the inside of the sleeve is fixedly connected to a clamping ring. When the annular member drives the sealing ring 2 to move downward, the clamping ring clamps the sealing ring 2 on the rotor shaft through the inclined surface of the inner wall.

[0014] As a further description of the above technology, a device for detecting the waterproof performance of a plastic-encapsulated motor rotor is provided: a separation unit is provided on the annular member, and the separation unit includes a separation ring slidably connected to one end of the annular member, and a second spring is provided between the separation ring and the annular member.

[0015] As a further description of the above technology, a device for detecting the waterproof performance of a plastic-encapsulated motor rotor is provided: a water flow generating unit is provided on the sleeve, and the water flow generating unit includes a spring fixed on the sleeve, and the outer rotation of the sleeve is connected to an impeller, and the annular member drives the impeller to rotate in one direction through the spring.

[0016] As a further description of the above-mentioned technology, a device for detecting the waterproof performance of a plastic-encapsulated motor rotor is provided: the water supply mechanism includes a water supply pipe fixed inside the lower mold base and the upper mold base, one end of the water supply pipe is fixed to the water outlet of the pump, and the other end of the water supply pipe is fixedly installed with an electromagnetic valve 1, the outside of the sleeve is rotatably connected to a water supply ring, and one side of the water supply ring is fixedly installed with an electromagnetic valve 3. When the electromagnetic valve 3 is opened, the rotor shell welding point is connected to the internal cavity of the lower mold base and the upper mold base through the sleeve, the water inlet hole of the ring and the water supply ring.

[0017] As a further description of a device for detecting the waterproof performance of a plastic-encapsulated motor rotor according to the above technology: solenoid valve 2 is fixedly installed between the water supply ring and the water supply pipe and is connected through solenoid valve 2. When solenoid valve 1 and solenoid valve 3 are closed and solenoid valve 2 is opened, the pump directly injects water into the water supply ring through the water supply pipe.

[0018] As a further description of the above-mentioned technology, a device for detecting the waterproof performance of a plastic-encapsulated motor rotor is provided: the upper transmission assembly also includes a one-way transmission unit, the one-way transmission unit includes a turntable fixed on the upper motor drive shaft, the outer portion of the turntable is rotatably connected to gear one meshing with gear two, one side of the turntable is rotatably connected to a pawl, and a torsion spring is provided at the connection between the pawl and the turntable.

[0019] In summary, due to the use of the above-mentioned technology in a device for detecting the waterproof performance of a plastic-encapsulated motor rotor, the beneficial effects of the present invention are:

[0020] After the lower mold base and the upper mold base are closed, the solenoid valve 2 is closed and the solenoid valve 1 is opened. The pump directly injects water into the test cavity and pressurizes it through the water pipe to realize the waterproof performance test of the entire rotor. When the ring part abuts against the rotor shell, the solenoid valve 1 is closed and the solenoid valve 2 is opened. The pump injects water and pressurizes the local positions on the welding points at both ends of the rotor shell through the water pipe, the water ring and the sleeve and the water inlet hole of the ring part. This design can not only realize the local waterproof performance test of the welding points of the rotor shell and find the specific leakage point position on the welding point so as to improve the production process in time, but also can separately pressurize the local position on the welding point to test the waterproof performance of different positions on the welding point, so as to make the test results more refined and facilitate further improvement of the waterproof performance of the rotor.

[0021] When a leak is detected at a certain position on the weld of the rotor housing, the ring member continues to deflect to drive the sealing ring to seal the leak point, and the waterproof performance of the remaining parts of the weld point is continuously tested. Therefore, when there are multiple leaks at the weld of the rotor housing, the present application can detect and troubleshoot each leak point one by one, making the test results more accurate and comprehensive.

[0022] The rotor weld points are isolated from the test cavity by a separator ring, and water is injected into the separator ring to pressurize it, which enables the overall waterproofness test of the rotor weld points. This design can detect the overall waterproof weak points at the weld points through pressurization, so as to improve the waterproof weak points of the rotor and enhance the waterproof performance of the rotor.

[0023] This application drives the rotor to rotate by the upper motor, and at the same time, the rotation of the two impellers generates water flow inside the test cavity to impact the rotor welding points, simulating the actual waterproof conditions during the operation of the rotor, improving the authenticity of the test results, and facilitating accurate evaluation of the rotor's ability to resist water flow impact and prevent water intrusion during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Shows an overall schematic diagram provided according to an embodiment of the present invention;

[0025] Figure 2 A schematic cross-sectional view of a lower die base and an upper die base provided in an embodiment of the present invention is shown;

[0026] Figure 3 It shows a schematic diagram of the interior of the lower die base provided according to an embodiment of the present invention;

[0027] Figure 4 The embodiment of the present invention provides Figure 3 Enlarged view of point A in the middle;

[0028] Figure 5 Shows three schematic diagrams of a solenoid valve provided according to an embodiment of the present invention;

[0029] Figure 6 The embodiment of the present invention provides Figure 5 Enlarged view of point B in the middle;

[0030] Figure 7 It shows a plan view of a ring member provided in an embodiment of the present invention;

[0031] Figure 8 A schematic cross-sectional view of a sleeve provided in an embodiment of the present invention is shown;

[0032] Figure 9 It shows a schematic diagram of the interior of the upper die base provided according to an embodiment of the present invention;

[0033] Figure 10 A schematic diagram of a fixing assembly provided in an embodiment of the present invention is shown;

[0034] Figure 11 The embodiment of the present invention provides Figure 10 Enlarged view of point C in the middle.

[0035] Legend:

[0036] 10. Cabinet; 11. Hydraulic rod; 12. Lifting plate; 13. Pump; 14. Pressure sensor; 15. Lower die base; 16. Upper die base;

[0037] 20. Lower transmission assembly; 21. Lower motor; 22. Electric telescopic rod; 23. Lower gear; 24. Lower connecting pipe; 25. Lower gear ring;

[0038] 30. Upper transmission assembly; 31. Upper motor; 32. Upper gear; 33. Upper gear ring; 34. Upper connecting pipe; 35. One-way transmission unit; 351. Turntable; 352. Gear 1; 353. Ratchet; 354. Torsion spring;

[0039] 40. Fixing assembly; 41. Fixing frame; 42. Gear 2; 43. Reducer; 44. Support spring;

[0040] 50. Waterproof testing mechanism; 51. Sleeve; 52. First spring; 53. Ring member; 54. Bump; 55. Separation unit; 551. Separation ring; 552. Second spring; 56. Water flow generating unit; 561. Shrapnel; 562. Impeller; 57. Sealing unit; 571. Sealing ring 1; 572. Clamping ring; 573. Sealing ring 2;

[0041] 60. Water delivery mechanism; 61. Water delivery pipe; 62. Solenoid valve 1; 63. Solenoid valve 2; 64. Solenoid valve 3; 65. Water delivery ring. DETAILED DESCRIPTION

[0042] The following, in conjunction with the accompanying drawings, provides a clear and complete description of a device for detecting the waterproof performance of a plastic-encapsulated motor rotor, according to the present invention. Obviously, the described embodiments are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0043] like Figures 1-11 As shown, the present invention provides a device for testing the waterproof performance of a plastic-encapsulated motor rotor: comprising a cabinet 10, a hydraulic rod 11 fixedly mounted on the top of the cabinet 10, a lifting plate 12 fixedly connected to the telescopic end of the hydraulic rod 11, an upper die base 16 and a lower die base 15 fixedly connected to the bottom of the lifting plate 12 and the workbench of the cabinet 10, respectively, the hydraulic rod 11 is controlled to extend to drive the lifting plate 12 and the upper die base 16 to descend, and after the upper die base 16 descends and closes with the upper die base 16, a closed test cavity is formed between the two. After the rotor is placed in the test cavity, the waterproof performance of the rotor is tested by water injection and pressurization, a pressure sensor 14 is mounted on the lifting plate 12, and a pump 13 is mounted inside the cabinet 10, and further comprising:

[0044] Two waterproof testing mechanisms 50 are respectively provided in the lower die base 15 and the upper die base 16. The waterproof testing mechanisms 50 include a sleeve 51. An annular member 53 is movably connected to the interior of the sleeve 51. A first spring 52 is provided between the sleeve 51 and the annular member 53. Water inlet holes are formed on one side of the annular member 53 and the sleeve 51. A protrusion 54 is fixedly connected to one side of the annular member 53 and is embedded in the water inlet hole of the sleeve 51. When the annular member 53 abuts the rotor, the sleeve 51 rotates to align its water inlet hole with the annular member 53, so that pressure can be applied to a local position on the weld point of the rotor shell through the water inlet holes of the two.

[0045] The lower transmission assembly 20 and the upper transmission assembly 30 are respectively used to drive the two waterproof test mechanisms 50, the fixing assembly 40 is used to lock the rotor when the lower mold base 15 and the upper mold base 16 are closed, and the water supply mechanism 60;

[0046] When the annular member 53 abuts against the rotor housing, the water inlet on the annular member 53 is located at the welding point between the rotor housing and the rotating shaft. The waterproof performance of the welding point is tested by injecting water into the water inlet. The testing position is switched when the annular member 53 rotates.

[0047] Reference Figure 9 and Figure 10The fixing assembly 40 includes a fixing frame 41 fixedly connected to the inside of the upper mold base 16, and the bottom of the fixing frame 41 is rotatably connected to a gear 2 42, and the inside of the gear 2 42 is slidably connected to a reducer 43, and the inner diameter of the reducer 43 gradually decreases from bottom to top. A support spring 44 is provided between the gear 2 42 and the reducer 43. After the lower mold base 15 and the upper mold base 16 are closed, the top end of the rotor shaft is inserted into the reducer 43 and causes the reducer 43 to move upward. At this time, the support spring 44 is stretched, and the support spring 44 applies downward pressure to the reducer 43, increasing the extrusion force between the reducer 43 and the rotor shaft, so that the rotor shaft and the reducer 43 are fixed under the action of friction. By fixing the rotor shaft, the annular member 53 can be prevented from rotating with the rotor when rotating, thereby ensuring that the annular member 53 rotates relative to the rotor, and the waterproof performance of each position on the rotor welding point is tested.

[0048] Reference Figure 9 The upper transmission assembly 30 includes an upper motor 31 fixedly mounted inside the upper die base 16. The drive shaft of the upper motor 31 is fixedly connected to the upper gear 32. The interior of the upper die base 16 is rotatably connected to an upper connecting tube 34 fixed to the sleeve 51. The upper connecting tube 34 cannot move up and down. The exterior of the upper connecting tube 34 is fixedly connected to an upper gear ring 33 meshing with the upper gear 32 and rotatably connected to the interior of the upper die base 16. When the electric telescopic rod 22 is extended, the waterproof test mechanism 50 below is driven to move upward, so that the rotor is clamped between the two waterproof test mechanisms 50. In between, the annular parts 53 in the two waterproof testing mechanisms 50 are respectively in contact with the two ends of the rotor shell. At this time, the bottom of the rotor is separated from the lower mold base 15, which can prevent the bottom of the inner wall of the lower mold base 15 from blocking the rotor shell, and avoid the situation where the blocked part cannot be detected during the overall waterproof performance test of the rotor. After the upper motor 31 is started, it drives the upper gear 32 to rotate, thereby driving the upper gear ring 33, the upper connecting pipe 34 and the sleeve 51 to rotate. The sleeve 51 rotates to push the protrusion 54 and drive the annular part 53 to rotate, switching the position of the water inlet hole on the welding point above the rotor shell.

[0049] Reference Figure 3 The lower transmission assembly 20 includes a lower motor 21 and an electric telescopic rod 22 fixedly mounted inside the lower die base 15. The driving shaft of the lower motor 21 is fixedly connected to the lower gear 23. The telescopic end of the electric telescopic rod 22 is rotatably connected to the lower connecting tube 24 fixed to the sleeve 51. The outer portion of the lower connecting tube 24 is slidably connected to the lower gear ring 25 meshing with the lower gear 23 and rotatably connected to the inside of the lower die base 15. After the lower motor 21 is started, it drives the lower gear 23 to rotate, thereby driving the lower gear ring 25, the lower connecting tube 24 and the sleeve 51 under the rotor to rotate, causing the protrusion 54 and the ring 53 to rotate, switching the position of the water inlet hole on the welding point below the rotor shell.

[0050] Reference Figure 7 In order to ensure the sealing between the ring member 53 and the rotor when the welding points of the rotor housing are pressurized, a sealing unit 57 is provided inside the sleeve 51. The sealing unit 57 includes a sealing ring 1 571 fixed to one end of the ring member 53. When the ring member 53 abuts against the rotor housing, the sealing ring 1 571 is located between the ring member 53 and the rotor to seal the two. The other end of the ring member 53 is fixedly connected to a sealing ring 2 573. The interior of the sleeve 51 is fixedly connected to a tightening ring 572. When the ring member 53 drives the sealing ring 2 573 to move downward, the tightening ring 572 clamps the sealing ring 2 573 on the rotor shaft through the inner wall inclined surface, thereby sealing the ring member 53 and the rotor shaft.

[0051] In order to improve the functionality of the detection equipment and enable the detection equipment to directly test the waterproof performance of the entire rotor shell weld, a separation unit 55 is provided on the annular member 53. The separation unit 55 includes a separation ring 551 slidably connected to one end of the annular member 53. A second spring 552 is provided between the separation ring 551 and the annular member 53. The elastic force of the second spring 552 is much greater than the elastic force of the first spring 52. Therefore, when the first spring 52 is compressed, the second spring 552 is in an uncompressed state. At this time, the sealing unit 57 has been sealed, but the annular member 53 does not abut against the rotor. The separation ring 551 abuts against the rotor, isolating the rotor shell weld from the test cavity. At this time, water is injected into the separation ring 551 and pressurized to detect the overall waterproof performance of the rotor shell weld, so as to test the weak parts of the weld as a whole when there is no leakage point in the weld.

[0052] Reference Figure 5 、 Figure 6 and Figure 7 A water flow generating unit 56 is provided on the sleeve 51. The water flow generating unit 56 includes a spring piece 561 fixed on the sleeve 51. The outer rotation of the sleeve 51 is connected to the impeller 562. The ring member 53 drives the impeller 562 to rotate in one direction through the spring piece 561. The rotation of the impeller 562 generates a water flow inside the test cavity to impact the rotor welding point, and detects the waterproof effect of the rotor when it is impacted by the water flow. When the ring member 53 rotates to detect the waterproof performance of the local position of the welding point, the impeller 562 does not rotate to avoid disturbing the water flow and interfering with the test.

[0053] Reference Figure 3 、 Figure 4 and Figure 5The water supply mechanism 60 includes a water supply pipe 61 fixed to the inside of the lower die base 15 and the upper die base 16. One end of the water supply pipe 61 is fixed to the water outlet of the pump 13, and the other end of the water supply pipe 61 is fixedly installed with an electromagnetic valve 1 62. The outside of the sleeve 51 is rotatably connected to a water supply ring 65, and one side of the water supply ring 65 is fixedly installed with an electromagnetic valve 3 64. When the electromagnetic valve 3 64 is opened, the rotor shell welding point is connected to the internal cavity of the lower die base 15 and the upper die base 16 through the sleeve 51, the water inlet hole of the ring 53 and the water supply ring 65, so that the pressure on the rotor shell welding point is consistent with the pressure on the outside of the rotor shell, and the waterproof performance of various parts of the rotor under the same pressure is tested.

[0054] A solenoid valve 2 63 is fixedly installed between the water supply ring 65 and the water supply pipe 61 and is connected through the solenoid valve 2 63. When the solenoid valve 1 62 and the solenoid valve 3 64 are closed and the solenoid valve 2 63 is opened, the pump 13 directly injects water into the water supply ring 65 through the water supply pipe 61, and injects water and pressurizes the local positions on the welding points at both ends of the rotor shell through the water inlet holes of the sleeve 51 and the annular member 53 to realize the local waterproof performance test of the rotor shell welding points.

[0055] The pressure sensor 14 is connected to the water supply ring 65 and the interior of the test cavity, and can perform waterproof performance testing on the local positions of the rotor shell welding points and the entire rotor.

[0056] Reference Figure 10 and Figure 11 The upper transmission assembly 30 also includes a one-way transmission unit 35. The one-way transmission unit 35 includes a turntable 351 fixed to the drive shaft of the upper motor 31. The outer rotation of the turntable 351 is connected to the gear 1 352 that meshes with the gear 2 42. One side of the turntable 351 is rotatably connected to a pawl 353. A torsion spring 354 is provided at the connection between the pawl 353 and the turntable 351. The upper motor 31 drive shaft rotates and drives the turntable 351 and the upper gear 32 to rotate at the same time. Under the action of the pawl 353 and the torsion spring 354, the turntable 351 can only drive the gear 1 352 to rotate in one direction. Through the unidirectional transmission of the one-way transmission unit 35, the rotation of the rotor is separated from the upper gear ring 33. The rotor is in a stationary state when the waterproof performance is tested by hydrostatic pressure. When the impeller 562 rotates to generate water flow inside the test cavity to impact the rotor welding point, the rotor is in a rotating state, simulating the actual waterproof condition of the rotor during operation and improving the authenticity of the test results.

[0057] Working principle: Mode 1, test the waterproof performance of the entire rotor: Place the rotor inside the lower die base 15, control the hydraulic rod 11 to extend to drive the lifting plate 12 and the upper die base 16 to move downward, so that the upper die base 16 and the lower die base 15 are molded together. At this time, the test cavity between the lower die base 15 and the upper die base 16 is sealed, the solenoid valve 2 63 and the solenoid valve 3 64 are closed, the solenoid valve 1 62 is opened, and the pump 13 directly injects water into the test cavity through the water pipe 61 and the solenoid valve 1 62 to test the overall waterproof performance of the rotor;

[0058] Mode 2: Test the waterproof performance of the rotor shell weld as a whole: control the electric telescopic rod 22 to extend and drive the lower connecting pipe 24, sleeve 51, first spring 52, ring 53, second spring 552 and separator ring 551 to move upward, so that the separator ring 551 contacts the bottom end of the rotor and pushes the rotor upward, so that the top end of the rotor contacts the upper separator ring 551. At this time, the two separator rings 551 are sealed with the rotor shell, separating the welds at both ends of the rotor shell from the test cavity, start the lower motor 21 to drive the lower gear 23 to rotate, and drive the lower connecting pipe 24 and sleeve 51 to rotate through the lower gear ring 25, so that the water inlet of the sleeve 51 is connected to the water inlet of the ring 53, close the solenoid valve 1 62 and the solenoid valve 3 64, open the solenoid valve 2 63, and the pump 13 injects water into the separator ring 551 through the water pipe 61, the solenoid valve 2 63, the water ring 65 and the water inlet to test the waterproof performance of the rotor shell weld as a whole;

[0059] Mode three, test the waterproof performance of the local position of the rotor shell welding point: continue to drive the sleeve 51 upward by extending the electric telescopic rod 22 until the second spring 552 is compressed and the separating ring 551 is retracted into the inside of the ring part 53. At this time, the sealing ring 1 571 abuts against the rotor, sealing the ring part 53 and the rotor shell. The ring part 53 retracts into the inside of the sleeve 51 and drives the sealing ring 2 573 to move, so that the closing ring 572 locks the sealing ring 2 573 on the rotor shaft. The positions on the rotor shell welding point that are not connected to the water inlet hole are all sealed by the sealing ring 1 571. At this time, the solenoid valve 1 62 and the solenoid valve 3 64 are closed, the solenoid valve 2 63 is opened, and the pump The machine 13 injects water into the water inlet through the water pipe 61, the second solenoid valve 63 and the water supply ring 65 to increase pressure and detect the local waterproof performance of the rotor shell welding point. At this time, the lower motor 21 is started to continue to drive the sleeve 51 to rotate, pushing the protrusion 54 to drive the ring member 53 to rotate, which can switch the contact position between the water inlet and the welding point and switch the detection position. When the pressure inside the water inlet changes, the position on the welding point connected to the water inlet is the leakage point. The upper motor 31 is started to drive the upper gear 32 to rotate. The upper gear ring 33 and the upper connecting pipe 34 drive the sleeve 51 above the rotor to rotate. Similarly, the ring member 53 above the rotor rotates to switch the detection position.

[0060] Mode 4 simulates the waterproofing of the rotor when the weld point is impacted by water during rotor rotation: the drive shafts of the lower motor 21 and the upper motor 31 are controlled to rotate in opposite directions. The sleeves 51 below and above the rotor both rotate in opposite directions, driving the impeller 562 through the spring 561, generating water flow that impacts the rotor weld point. At the same time, the turntable 351 rotates, driving the gear 1 352 through the pawl 353 and the torsion spring 354, and then driving the gear 2 42, the reducer 43 and the rotor. The rotor is impacted by water during rotation, and the waterproofing performance of the rotor during actual operation is tested.

[0061] Mode 5: Testing the waterproof performance of the rotor, excluding the weld points on the housing: In Mode 2, the two separation rings 551 are sealed against the rotor housing, isolating the weld points at both ends of the rotor housing from the test cavity. No water is injected into the separation rings 551 to increase pressure. Solenoid valve 1 62 is opened, while solenoid valve 2 63 and solenoid valve 3 64 are closed. Pump 13 injects water into the test cavity through water pipe 61 and solenoid valve 1 62 to increase pressure.

[0062] Mode six simulates the waterproof condition of the rotor shell welding point when the plastic-sealed motor shell is suddenly broken and the rotor shell welding point is impacted by water flow: following mode five, the solenoid valve three 64 is opened, and the water between the test cavity and the rotor shell enters the water supply ring 65 through the solenoid valve three 64 and enters the separation ring 551 through the water inlet hole, impacting the position of the rotor shell welding point to test the waterproof performance of the welding point when it is impacted. At this time, the pump 13 injects water into the test cavity through the water supply pipe 61 and the solenoid valve one 62 to increase the pressure. When the rotor shell welding point is obviously broken, the sleeve 51 is controlled to rotate in the opposite direction by the lower motor 21 and the upper motor 31, so that the sleeve 51 and the ring part 53 are misaligned to close the water inlet hole to prevent water from continuing to enter the rotor.

[0063] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes to the device for detecting the waterproof performance of a plastic-encapsulated motor rotor and its inventive concept according to the technology of the present invention, and these changes should be covered by the scope of protection of the present invention.

Claims

1. A device for detecting the waterproof performance of a plastic-encapsulated motor rotor, comprising a cabinet (10), a hydraulic rod (11) fixedly mounted on the top of the cabinet (10), a telescopic end of the hydraulic rod (11) fixedly connected to a lifting plate (12), an upper die base (16) and a lower die base (15) fixedly connected to the bottom of the lifting plate (12) and a workbench of the cabinet (10), a pressure sensor (14) mounted on the lifting plate (12), and a pump (13) mounted inside the cabinet (10), characterized in that: Also includes: Two waterproof testing mechanisms (50), the waterproof testing mechanism (50) comprising a sleeve (51), an annular member (53) movably connected inside the sleeve (51), a first spring (52) being provided between the sleeve (51) and the annular member (53), a water inlet hole being provided on one side of the annular member (53) and the sleeve (51), and a protrusion (54) being fixedly connected to one side of the annular member (53) and embedded in the water inlet hole of the sleeve (51); A lower transmission assembly (20) and an upper transmission assembly (30) for driving two waterproof test mechanisms (50), respectively, a fixing assembly (40) for locking the rotor when the lower mold base (15) and the upper mold base (16) are closed, and a water delivery mechanism (60); A sealing unit (57) is provided inside the sleeve (51), and the sealing unit (57) includes a sealing ring 1 (571) fixed to one end of the annular member (53), and a sealing ring 2 (573) is fixedly connected to the other end of the annular member (53). A clamping ring (572) is fixedly connected inside the sleeve (51), and when the annular member (53) drives the sealing ring 2 (573) to move downward, the clamping ring (572) clamps the sealing ring 2 (573) onto the rotor shaft through the inner wall slope; A separation unit (55) is provided on the annular member (53), and the separation unit (55) comprises a separation ring (551) slidably connected to one end of the annular member (53), and a second spring (552) is provided between the separation ring (551) and the annular member (53); The sleeve (51) is provided with a water flow generating unit (56), the water flow generating unit (56) comprising a spring piece (561) fixed on the sleeve (51), the outer portion of the sleeve (51) is rotatably connected to an impeller (562), and the annular member (53) drives the impeller (562) to rotate in one direction via the spring piece (561); The water delivery mechanism (60) includes a water delivery pipe (61) fixed inside the lower die base (15) and the upper die base (16), one end of the water delivery pipe (61) is fixed to the water outlet of the pump (13), and the other end of the water delivery pipe (61) is fixedly installed with a solenoid valve (62), the outer portion of the sleeve (51) is rotatably connected to a water delivery ring (65), and one side of the water delivery ring (65) is fixedly installed with a solenoid valve (64), when the solenoid valve (64) is opened, the rotor shell welding point is communicated with the internal cavities of the lower die base (15) and the upper die base (16) through the sleeve (51), the water inlet hole of the ring member (53) and the water delivery ring (65); A second solenoid valve (63) is fixedly installed between the water delivery ring (65) and the water delivery pipe (61) and is connected via the second solenoid valve (63). When the first solenoid valve (62) and the third solenoid valve (64) are closed and the second solenoid valve (63) is opened, the pump (13) directly injects water into the water delivery ring (65) via the water delivery pipe (61); When the annular member (53) abuts against the rotor housing, the water inlet hole on the annular member (53) is located at the welding point between the rotor housing and the rotating shaft. Water is injected into the water inlet hole to detect the waterproof performance of the welding point. The detection position is switched when the annular member (53) rotates.

2. The device for detecting the waterproof performance of a plastic-encapsulated motor rotor according to claim 1, characterized in that: The fixing assembly (40) includes a fixing frame (41) fixedly connected to the interior of the upper die base (16), the bottom of the fixing frame (41) is rotatably connected to a gear 2 (42), the interior of the gear 2 (42) is slidably connected to a reducer (43), the inner diameter of the reducer (43) gradually decreases from bottom to top, a support spring (44) is provided between the gear 2 (42) and the reducer (43), after the lower die base (15) and the upper die base (16) are closed, the top end of the rotor shaft is inserted into the reducer (43) and the reducer (43) is moved upward, at which time the support spring (44) is stretched, and the rotor shaft and the reducer (43) are fixed under the action of friction.

3. The device for detecting waterproof performance of a plastic-encapsulated motor rotor according to claim 1, characterized in that: The lower transmission assembly (20) includes a lower motor (21) and an electric telescopic rod (22) fixedly mounted inside the lower die base (15); a drive shaft of the lower motor (21) is fixedly connected to a lower gear (23); a telescopic end of the electric telescopic rod (22) is rotatably connected to a lower connecting tube (24) fixed to a sleeve (51); and an outer portion of the lower connecting tube (24) is slidably connected to a lower gear ring (25) meshing with the lower gear (23) and rotatably connected to the inside of the lower die base (15).

4. The device for detecting the waterproof performance of a plastic-encapsulated motor rotor according to claim 1, characterized in that: The upper transmission assembly (30) includes an upper motor (31) fixedly mounted inside the upper die base (16), a drive shaft of the upper motor (31) fixedly connected to an upper gear (32), an upper connecting tube (34) fixed to a sleeve (51) is rotatably connected inside the upper die base (16), and an upper gear ring (33) is fixedly connected to the outside of the upper connecting tube (34) and meshes with the upper gear (32) and is rotatably connected to the inside of the upper die base (16).

5. The device for detecting waterproof performance of a plastic-encapsulated motor rotor according to claim 1, characterized in that: The upper transmission assembly (30) further includes a one-way transmission unit (35), the one-way transmission unit (35) including a turntable (351) fixed on the drive shaft of the upper motor (31), the outer portion of the turntable (351) being rotatably connected to a gear 1 (352) meshing with a gear 2 (42), one side of the turntable (351) being rotatably connected to a pawl (353), and a torsion spring (354) being provided at a connection between the pawl (353) and the turntable (351).

Images