Plastic package motor rotor waterproof performance detection device

Abstract

The invention discloses a plastic package motor rotor waterproof performance detection device, and relates to the technical field of waterproof detection equipment, the plastic package motor rotor waterproof performance detection device comprises a cabinet body, the top of the cabinet body is fixedly provided with a hydraulic rod, the telescopic end of the hydraulic rod is fixedly connected with a lifting plate, and the bottom of the lifting plate and a workbench of the cabinet body are fixedly connected with an upper die holder and a lower die holder respectively; a pressure sensor is installed on the lifting plate, a pump machine is installed in the cabinet body, each waterproof testing mechanism comprises a sleeve, an annular piece is movably connected into the sleeve, a first spring is arranged between the sleeve and the annular piece, and water inlet holes are formed in one side of the annular piece and one side of the sleeve; the local waterproof performance detection of the welding spot of the rotor shell is realized, the specific leakage point position on the welding spot is found out, so that the production process is improved in time, the local position on the welding spot can be independently pressurized, the waterproof performance of different positions on the welding spot is tested, and the detection result is more refined.

Description

Technical Field

[0001] The 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] Plastic-encapsulated motors are motors that use plastic packaging technology. They mainly use engineering plastics to encapsulate the motor's stator core, windings and other components as a whole to improve the motor's protection, insulation and stability. Since the insulation performance between windings or between windings and cores will decrease after the motor rotor enters water, and electrochemical corrosion is prone to occur, which seriously shortens the motor's service life, the motor rotor needs to be specially tested for waterproof performance before leaving the factory.

[0003] The outside of a waterproof rotor is usually wrapped with a shell, 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 detecting the waterproof performance of the rotor. Traditional waterproof performance testing 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 testing 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 a rotor through the pressure change inside a chamber, but cannot detect the specific position 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] In order to achieve the above-mentioned purpose, the present invention adopts the following technology: a device for detecting the waterproof performance of a plastic-sealed motor rotor: comprising a cabinet, a hydraulic rod is fixedly installed on the top of the cabinet, a lifting plate is fixedly connected to the telescopic end of the hydraulic rod, an upper die seat and a lower die seat are fixedly connected to the bottom of the lifting plate and the working table of the cabinet respectively, a pressure sensor is installed on the lifting plate, a pump is installed inside the cabinet, and further comprising: Two waterproof testing mechanisms, the waterproof testing mechanism comprising a sleeve, an annular member is movably connected inside the sleeve, a first spring is arranged between the sleeve and the annular member, a water inlet hole is opened on one side of the annular member and the sleeve, and a protrusion embedded in the water inlet hole of the sleeve is fixedly connected on one side of the annular member; A lower transmission assembly and an upper transmission assembly respectively used to drive two waterproof test mechanisms, a fixing assembly used to lock the rotor when the lower mold base and the upper mold base are closed, and a water delivery mechanism; 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 detected by injecting water into the water inlet hole. The detection position is switched when the annular member rotates.

[0007] 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 an 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 supporting 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 which time the supporting spring is stretched, and the rotor shaft and the reducer are fixed under the action of friction.

[0008] 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 a lower mold base, the drive shaft of the lower motor is fixedly connected to a lower gear, the telescopic end of the electric telescopic rod is rotatably connected to a lower connecting tube fixed to a sleeve, the outer portion of the lower connecting tube is slidably connected to a lower gear ring meshing with the lower gear and rotatably connected to the inside of the lower mold base.

[0009] 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 installed inside an upper mold base, a drive shaft of the upper motor is fixedly connected to an upper gear, the interior of the upper mold base is rotatably connected to an upper connecting tube fixed to a 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.

[0010] As a further description of the above-mentioned technology, a device for detecting the waterproof performance of a plastic-sealed motor rotor is provided: a sealing unit is arranged inside the sleeve, and the sealing unit includes a sealing ring 1 fixed to one end of an annular member, and a sealing ring 2 is fixedly connected to the other end of the annular member, and a clamping ring is fixedly connected to the inside of the sleeve. When the annular member drives the sealing ring 2 to move downward, the clamping ring clamps the sealing ring 2 onto the rotor shaft through the inner wall inclined surface.

[0011] 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.

[0012] 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 arranged on the sleeve, and the water flow generating unit includes a spring sheet 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 unidirectionally through the spring sheet.

[0013] As a further description of a device for detecting the waterproof performance of a plastic-sealed motor rotor according to the above technology: the water supply mechanism includes a water supply pipe fixed to the inside of a lower mold base and an upper mold base, one end of the water supply pipe is fixed to the water outlet of a pump, and an electromagnetic valve 1 is fixedly installed on the other end of the water supply pipe, and a water supply ring is rotatably connected to the outside of the sleeve, and an electromagnetic valve 3 is fixedly installed on one side of the water supply ring. When the electromagnetic valve 3 is opened, the welding point of the rotor shell 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.

[0014] As a further description of the above-mentioned technology, a device for detecting the waterproof performance of a plastic-sealed motor rotor is provided: a solenoid valve 2 is fixedly installed between the water supply ring and the water supply pipe and is connected through the solenoid valve 2; when the solenoid valve 1 and the solenoid valve 3 are closed and the solenoid valve 2 is opened, the pump directly injects water into the water supply ring through the water supply pipe.

[0015] 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, and the one-way transmission unit includes a turntable fixed on the upper motor drive shaft, and the outer portion of the turntable is rotatably connected to gear one meshing with gear two, and 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.

[0016] In summary, due to the use of the above-mentioned technology, a device for detecting the waterproof performance of a plastic-encapsulated motor rotor has the following beneficial effects: After the lower mold base and the upper mold base are molded together, the solenoid valve 2 is closed and the solenoid valve 1 is opened. The pump directly injects water into the test cavity through the water pipe and pressurizes it to realize the waterproof performance test of the rotor as a whole. 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 out 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 result more refined and facilitate the further improvement of the waterproof performance of the rotor. When a leak is detected at a certain position on the rotor housing weld, the ring member continues to deflect to drive the sealing ring to seal the leak, and the remaining parts of the weld continue to be tested for waterproof performance. Therefore, when multiple leaks occur at the rotor housing weld, the present application can detect and troubleshoot each leak one by one, making the test results more accurate and comprehensive. The rotor welding point is isolated from the test cavity by a separation ring, and water is injected into the separation ring to pressurize it, so as to realize the overall waterproofness test of the rotor welding point. This design can detect the overall waterproof weak point at the welding point by pressurizing, so as to improve the waterproof weak point of the rotor and improve the waterproof performance of the rotor. In the present application, the upper motor drives the rotor to rotate. 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 situation 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

[0017] Figure 1 It shows an overall schematic diagram provided according to an embodiment of the present invention; Figure 2 A schematic cross-sectional view of a lower die base and an upper die base provided according to an embodiment of the present invention is shown; Figure 3 It shows a schematic diagram of the interior of the lower die base provided according to an embodiment of the present invention; Figure 4 The embodiment of the present invention provides Figure 3 Enlarged view of point A in the middle; Figure 5 Three schematic diagrams of a solenoid valve provided according to an embodiment of the present invention are shown; Figure 6 The embodiment of the present invention provides Figure 5 Enlarged view of point B in the middle; Figure 7 A schematic plan view of a ring member provided according to an embodiment of the present invention is shown; Figure 8 A schematic cross-sectional view of a sleeve provided in an embodiment of the present invention is shown; Fig. 9 It shows a schematic diagram of the interior of an upper die base provided according to an embodiment of the present invention; Fig.10 A schematic diagram of a fixing assembly provided according to an embodiment of the present invention is shown; Fig.11 The embodiment of the present invention provides Fig.10 Enlarged view of center C.

[0018] Legend: 10. Cabinet; 11. Hydraulic rod; 12. Lifting plate; 13. Pump; 14. Pressure sensor; 15. Lower die base; 16. Upper die base; 20. Lower transmission assembly; 21. Lower motor; 22. Electric telescopic rod; 23. Lower gear; 24. Lower connecting pipe; 25. Lower gear ring; 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; 40. Fixing assembly; 41. Fixing frame; 42. Gear 2; 43. Reducer; 44. Support spring; 50. Waterproof testing mechanism; 51. Sleeve; 52. First spring; 53. Ring member; 54. Protrusion; 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. Converging ring; 573. Sealing ring 2; 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

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technology in the embodiments of the present invention, a plastic-encapsulated motor rotor waterproof performance detection device. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figure 1-Figure 11As shown, a device for detecting the waterproof performance of a plastic-encapsulated motor rotor provided by the present invention comprises a cabinet 10, a hydraulic rod 11 is fixedly installed on the top of the cabinet 10, a lifting plate 12 is fixedly connected to the telescopic end of the hydraulic rod 11, an upper die seat 16 and a lower die seat 15 are 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 seat 16 to descend, and a closed test cavity is formed between the upper die seat 16 after the upper die seat 16 descends and closes with the upper die seat 16, and the waterproof performance of the rotor is detected by water injection and pressurization after the rotor is placed in the test cavity, a pressure sensor 14 is installed on the lifting plate 12, and a pump 13 is installed inside the cabinet 10, and further comprises: Two waterproof test mechanisms 50 are respectively arranged in the lower die base 15 and the upper die base 16. The waterproof test mechanism 50 includes a sleeve 51. A ring member 53 is movably connected inside the sleeve 51. A first spring 52 is arranged between the sleeve 51 and the ring member 53. Water inlet holes are opened on one side of the ring member 53 and the sleeve 51. A protrusion 54 embedded in the water inlet hole of the sleeve 51 is fixedly connected on one side of the ring member 53. When the ring member 53 abuts against the rotor, the sleeve 51 rotates to align its water inlet hole with the ring member 53, so that the local position on the welding point of the rotor shell can be pressurized through the water inlet holes of the two. A lower transmission assembly 20 and an upper transmission assembly 30 respectively used to drive two waterproof test mechanisms 50, a fixing assembly 40 used to lock the rotor when the lower mold base 15 and the upper mold base 16 are molded together, and a water delivery mechanism 60; When the ring member 53 abuts against the rotor housing, the water inlet hole on the ring 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 hole. The testing position is switched when the ring member 53 rotates.

[0021] Reference Fig. 9 and Fig.10 The fixing assembly 40 includes a fixing frame 41 fixedly connected to the interior of the upper die seat 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 supporting spring 44 is provided between the gear 2 42 and the reducer 43, after the lower die seat 15 and the upper die seat 16 are molded, the top end of the rotor shaft is inserted into the reducer 43 and the reducer 43 is moved upward, at this time the supporting spring 44 is stretched, the supporting 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, and by fixing the rotor shaft, it is possible to prevent the annular member 53 from driving the rotor to rotate together 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.

[0022] Reference Fig. 9The upper transmission assembly 30 includes an upper motor 31 fixedly mounted inside the upper die seat 16, a driving shaft of the upper motor 31 is fixedly connected to an upper gear 32, an upper connecting tube 34 fixed to the sleeve 51 is rotatably connected inside the upper die seat 16, the upper connecting tube 34 cannot move up and down, an upper gear ring 33 meshing with the upper gear 32 and rotatably connected to the inside of the upper die seat 16 is fixedly connected to the outside of the upper connecting tube 34, and the waterproof test mechanism 50 below is driven to move upward when the electric telescopic rod 22 is extended, so that the rotor is clamped between the two waterproof test mechanisms 50 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.

[0023] Reference Figure 3 The lower transmission assembly 20 includes a lower motor 21 and an electric telescopic rod 22 fixedly installed inside the lower mold 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 lower mold 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, so that the protrusion 54 and the ring 53 rotate, and the position of the water inlet hole on the welding point below the rotor shell is switched.

[0024] Reference Figure 7 In order to ensure the sealing between the ring member 53 and the rotor when the welding point of the rotor shell is 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 shell, 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 inside of the sleeve 51 is fixedly connected to a closing ring 572. When the ring member 53 drives the sealing ring 2 573 to move downward, the closing ring 572 clamps the sealing ring 2 573 on the rotor shaft through the inner wall inclined surface to seal the ring member 53 and the rotor shaft.

[0025] 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, and 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 has not abutted against the rotor. The separation ring 551 abuts against the rotor to isolate 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.

[0026] 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, so as to detect the waterproof effect of the rotor when 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.

[0027] Reference Figure 3 , Figure 4 and Figure 5 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 an electromagnetic valve 1 62, the outside 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 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 annular member 53 and the water delivery 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 detected.

[0028] A solenoid valve 2 63 is fixedly installed between the water delivery ring 65 and the water delivery 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 delivery ring 65 through the water delivery 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, so as to realize the local waterproof performance detection of the welding points of the rotor shell.

[0029] The pressure sensor 14 is connected to the water delivery ring 65 and the inside of the test cavity, and can perform waterproof performance tests on the local positions of the welding points of the rotor shell and the waterproof performance tests on the rotor as a whole.

[0030] Reference Fig.10 and Fig.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 on the driving shaft of the upper motor 31. The outer portion of the turntable 351 is rotatably connected to a gear 1 352 meshing with the gear 2 42. A pawl 353 is rotatably connected to one side of the turntable 351. A torsion spring 354 is provided at the connection between the pawl 353 and the turntable 351. The rotation of the driving shaft of the upper motor 31 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 one-way 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 a 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, thereby improving the authenticity of the test result.

[0031] Working principle: Mode 1, testing the waterproof performance of the rotor as a whole: 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 closed, 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; Mode 2: Test the waterproof performance of the rotor shell welding points as a whole: control the extension of the electric telescopic rod 22 to drive the lower connecting pipe 24, sleeve 51, first spring 52, ring 53, second spring 552 and separation ring 551 to move upward, so that the separation ring 551 contacts the bottom end of the rotor and pushes the rotor upward, so that the top of the rotor contacts the upper separation ring 551. At this time, the two separation rings 551 are sealed with the rotor shell, and the welding points at both ends of the rotor shell are separated 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 hole of the sleeve 51 is connected with the water inlet hole 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 separation ring 551 through the water pipe 61, the solenoid valve 2 63, the water ring 65 and the water inlet hole to test the waterproof performance of the rotor shell welding points as a whole. Mode three, test the waterproof performance of the local position of the rotor shell welding point: continue to drive the sleeve 51 to move upward through the extension of the electric telescopic rod 22 until the second spring 552 is compressed and the separation ring 551 is retracted into the inside of the annular member 53. At this time, the sealing ring 1 571 abuts against the rotor to seal the annular member 53 and the rotor shell. The annular member 53 shrinks into 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 sealed by the sealing ring 1 571. At this time, the solenoid valve 1 62 and the solenoid valve 3 64 are closed, and 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 electromagnetic valve 63 and the water ring 65 to pressurize the water inlet, detect the local waterproof performance of the rotor shell welding point, and at this time, the lower motor 21 is started to continue to drive the sleeve 51 to rotate, and the protrusion 54 is pushed to drive the ring member 53 to rotate to 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 position, and the upper motor 31 is started to drive the upper gear 32 to rotate. The upper sleeve 51 above the rotor can be driven to rotate through the upper gear ring 33 and the upper connecting pipe 34. Similarly, the ring member 53 above the rotor is rotated to switch the detection position; Mode 4, simulating the waterproof condition of the rotor when the welding point is impacted by water flow when the rotor rotates: control the drive shafts of the lower motor 21 and the upper motor 31 to rotate in the opposite direction, and the sleeves 51 below and above the rotor both rotate in the opposite direction to drive the impeller 562 to rotate through the spring 561, generating water flow that impacts the rotor welding point, and at the same time, the turntable 351 rotates to drive the gear 1 352 to rotate through the pawl 353 and the torsion spring 354, and drives the gear 2 42, the reducer 43 and the rotor to rotate. The rotor is impacted by water flow when it rotates, and the waterproof performance of the rotor is tested during actual operation; Mode 5, testing the waterproof performance of the rotor except for the welding points of the shell: in mode 2, the two separation rings 551 are sealed with the rotor shell, and the welding points at both ends of the rotor shell are separated from the test cavity. No water is injected into the separation ring 551 for pressurization. At this time, the solenoid valve 1 62 is opened, the solenoid valve 2 63 and the solenoid valve 3 64 are closed, and the pump 13 injects water into the test cavity for pressurization through the water pipe 61 and the solenoid valve 1 62; Mode six simulates the waterproof condition of the rotor shell welding point when it is impacted by water flow when the plastic-sealed motor shell is suddenly broken: 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 through the lower motor 21 and the upper motor 31, so that the sleeve 51 and the ring 53 are misaligned to close the water inlet hole to prevent water from continuing to enter the rotor.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope 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 a plastic-encapsulated motor rotor waterproof performance detection device and its inventive concept according to the technology of the present invention, which should be covered by the protection scope 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 lifting plate (12) fixedly connected to the telescopic end of the hydraulic rod (11), an upper die seat (16) and a lower die seat (15) fixedly connected to the bottom of the lifting plate (12) and a workbench of the cabinet (10), respectively, a pressure sensor (14) mounted on the lifting plate (12), a pump (13) mounted inside the cabinet (10), characterized in that: Also includes: Two waterproof testing mechanisms (50), the waterproof testing mechanisms (50) comprising a sleeve (51), an annular member (53) being 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) respectively used to drive two waterproof test mechanisms (50), a fixing assembly (40) used to lock the rotor when the lower mold base (15) and the upper mold base (16) are closed, and a water delivery mechanism (60); When the annular member (53) is in contact with 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, and the waterproof performance of the welding point is tested by injecting water into the water inlet hole. The testing position is switched when the annular member (53) rotates.

2. A device for detecting waterproof performance of a plastic-encapsulated motor rotor according to claim 1, characterized in that: The fixing assembly (40) comprises a fixing frame (41) fixedly connected to the interior of the upper die seat (16); the bottom of the fixing frame (41) is rotatably connected to a second gear (42); the interior of the second gear (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 second gear (42) and the reducer (43); after the lower die seat (15) and the upper die seat (16) are molded together, 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 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) comprises 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 a lower gear (23); the telescopic end of the electric telescopic rod (22) is rotatably connected to a lower connecting tube (24) fixed to a sleeve (51); the 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 waterproof performance of a plastic-encapsulated motor rotor according to claim 1, characterized in that: The upper transmission assembly (30) comprises an upper motor (31) fixedly mounted inside the upper die base (16); a drive shaft of the upper motor (31) is 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) meshing with the upper gear (32) and rotatably connected to the inside of the upper die base (16) is fixedly connected outside the upper connecting tube (34).

5. The device for detecting waterproof performance of a plastic-encapsulated motor rotor according to claim 1, characterized in that: A sealing unit (57) is provided inside the sleeve (51), and the sealing unit (57) comprises a sealing ring 1 (571) fixed to one end of an annular member (53), and a sealing ring 2 (573) is fixedly connected to the other end of the annular member (53). A closing 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 closing ring (572) clamps the sealing ring 2 (573) onto the rotor shaft through the inner wall inclined surface.

6. The device for detecting waterproof performance of a plastic-encapsulated motor rotor according to claim 1, characterized in that: A separation unit (55) is provided on the annular member (53), wherein 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).

7. The device for detecting the waterproof performance of a plastic-encapsulated motor rotor according to claim 4, characterized in that: The sleeve (51) is provided with a water flow generating unit (56), the water flow generating unit (56) comprising a spring sheet (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 sheet (561).

8. The device for detecting waterproof performance of a plastic-encapsulated motor rotor according to claim 1, characterized in that: The water delivery mechanism (60) comprises a water delivery pipe (61) fixed inside the lower die seat (15) and the upper die seat (16); one end of the water delivery pipe (61) is fixed to the water outlet of the pump (13); the other end of the water delivery pipe (61) is fixedly mounted with a solenoid valve 1 (62); the outside of the sleeve (51) is rotatably connected with a water delivery ring (65); one side of the water delivery ring (65) is fixedly mounted with a solenoid valve 3 (64); when the solenoid valve 3 (64) is opened, the rotor housing welding point is connected to the internal cavities of the lower die seat (15) and the upper die seat (16) through the sleeve (51), the water inlet hole of the annular member (53) and the water delivery ring (65).

9. The device for detecting waterproof performance of a plastic-encapsulated motor rotor according to claim 8, characterized in that: A second solenoid valve (63) is fixedly installed between the water delivery ring (65) and the water delivery pipe (61), and the two are 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).

10. 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 comprises a one-way transmission unit (35), the one-way transmission unit (35) comprising a rotating disk (351) fixed on a driving shaft of the upper motor (31), the outer portion of the rotating disk (351) being rotatably connected to a gear one (352) meshing with a gear two (42), one side of the rotating disk (351) being rotatably connected to a ratchet (353), and a torsion spring (354) being provided at a connection between the ratchet (353) and the rotating disk (351).

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