A salt spray resistance test device for a motor stator

Abstract

The present invention discloses a salt spray test device for a motor stator, which relates to the technical field of salt spray tests. It includes a salt spray chamber with a test cavity opened inside. The salt spray chamber is rotatably connected with a cover plate. Inside the salt spray chamber, a circulation rack is fixedly connected. A drain pipe for discharging the condensed liquid-phase brine out of the salt spray chamber is communicated with the lower part of the circulation rack. A connecting rack is fixedly connected inside the salt spray chamber. One side of the test cavity far from the connecting rack is communicated with the circulation rack, and the connecting rack is communicated with the test cavity of the salt spray chamber. An air compressor is fixedly connected inside the salt spray chamber. A first fan is fixedly connected to one side of the connecting rack close to the test cavity, and a pneumatic nozzle is fixedly connected to one side of the connecting rack close to the first fan. In the present invention, a part of the salt spray flows upward along the first channel into the rotating rack and penetrates into the inner wall of the inner ring of the motor stator through the filter holes of the limiting block. Thus, by expanding the salt spray coverage rate, the range of the motor stator to be tested is expanded, and it is avoided that the test is not representative due to the inability to cover the salt spray locally.

Description

Technical Field

[0001] The present invention relates to the technical field of salt spray resistance testing, and particularly to a salt spray resistance testing device for a motor stator. Background Art

[0002] A motor stator is usually composed of metals (such as iron, copper) and insulating materials (such as enameled wire, insulating paper). These materials are prone to corrosion in humid and saline environments, affecting their mechanical strength and electrical performance. By conducting salt spray resistance tests, such extreme environments can be simulated, the performance of the motor stator under long-term exposure to salt spray conditions can be predicted, the corrosion resistance of these materials in harsh environments can be evaluated, and it can be ensured that the motor can operate stably for a long time in harsh environments.

[0003] Currently in the market, the motor stator is usually fixedly placed in a static salt spray chamber, and salt spray is sprayed into the chamber through a nozzle to simulate the corrosion environment. This method mainly focuses on the salt spray coverage of the external surface and it is difficult to guide the salt spray into the stator interior. The testing of the internal structure (such as the inner circle of the stator) is relatively weak, resulting in the corrosion resistance performance of the internal structure not being fully verified. Locally uncovered areas may lead to unrepresentative test results and unable to truly reflect the overall corrosion resistance performance of the stator. Some key parts are not fully tested, which may lead to the failure to detect design defects in a timely manner, increasing the risk of failures in actual applications. In addition, in the prior art, after the salt spray enters the test chamber, most of it is directly discharged without being effectively utilized, causing waste of resources.

[0004] In order to expand the test salt spray coverage rate and improve the salt spray utilization rate, the present invention proposes a salt spray resistance testing device for a motor stator. Summary of the Invention

[0005] In order to overcome the drawbacks proposed in the above background art, the present invention provides a salt spray resistance testing device for a motor stator.

[0006] A salt spray resistance test device for a motor stator, comprising a salt spray chamber. A test cavity is provided inside the salt spray chamber. A cover plate is rotatably connected to the salt spray chamber. A circulation frame is fixedly connected inside the salt spray chamber. A drain pipe for discharging the salt water condensed into a liquid phase out of the salt spray chamber is communicated with the lower part of the circulation frame. A connecting frame is fixedly connected inside the salt spray chamber. One side of the test cavity far from the connecting frame is communicated with the circulation frame. The connecting frame is communicated with the test cavity of the salt spray chamber and the connecting frame is communicated with the circulation frame. An air compressor is fixedly connected inside the salt spray chamber. A first fan is fixedly connected to one side of the connecting frame close to the test cavity. A pneumatic nozzle is fixedly connected to one side of the connecting frame close to the first fan. The pneumatic nozzle is provided with a salt solution inlet and a compressed air inlet. The compressed air inlet of the pneumatic nozzle is communicated with the air compressor through a pipeline. A rotating frame is rotatably connected inside the test cavity of the salt spray chamber. The rotating frame is communicated with the circulation frame. A second fan is fixedly connected to one side of the circulation frame close to the rotating frame. The rotating frame is fixedly connected with circumferentially distributed limiting blocks. The limiting blocks are provided with circumferentially uniformly distributed filter holes. A first valve is rotatably connected to one side of the circulation frame close to the connecting frame. The first valve is provided with a first valve hole, and the first valve hole faces the connecting frame.

[0007] Preferably, the rotating frame is provided with circumferentially distributed placement grooves, and the placement grooves of the rotating frame correspond to the limiting blocks one by one.

[0008] Preferably, a first channel and a second channel are arranged inside the circulation frame. The first channel guides to the inner bottom of the rotating frame, and the second channel guides to the connecting frame.

[0009] Preferably, it further comprises a diversion frame. The diversion frame is fixedly connected to the middle of the rotating frame and is used for uniformly diffusing the salt spray from the center of the rotating frame to the edge onto the motor stator.

[0010] Preferably, it further comprises a first motor. The first motor is fixedly connected inside the salt spray chamber. The rotating frame is fixedly connected with a first fixed gear. The output shaft of the first motor is fixedly connected with a second fixed gear, and the second fixed gear meshes with the first fixed gear.

[0011] Preferably, it further comprises a second motor. The second motor is fixedly connected inside the salt spray chamber. The output shaft of the second motor is fixedly connected with the first valve. A second valve is slidably connected inside the pipeline of the air compressor. A guiding groove is opened on one side of the first valve close to the second valve. The second valve is slidably connected with the guiding groove. The second valve is provided with a second valve hole. When the first valve hole faces the connecting frame, the second valve hole is misaligned with the air compressor.

[0012] Preferably, it further comprises a rotating plate. The rotating plate is rotatably connected to one side of the connecting frame close to the first fan. A limiting rod for locking the cover plate is slidably connected to the salt spray chamber. The rotating plate is used for pushing and pulling the limiting rod.

[0013] Preferably, the limiting rod is provided with a movable groove, and the limiting rod is movably connected with the rotating plate through the movable groove.

[0014] The present invention has the following advantages: Part of the salt spray of the present invention flows upward along the first channel into the rotating frame, and penetrates into the inner wall of the inner ring of the motor stator through the filter holes of the limiting block. In this way, by expanding the salt spray coverage rate, the range of the motor stator to be tested is expanded, and the situation that the salt spray cannot cover locally and leads to unrepresentative testing is avoided.

[0015] Another part of the salt spray of the present invention enters the second channel to the right, then enters the first valve to the right, and then flows upward through the first valve hole into the connecting frame, and then flows back to cover the motor stator in the salt spray chamber. In this way, the internal circulation of the salt spray is realized, the loss can be reduced, and the utilization rate of the salt spray can be improved. The salt spray entering the rotating frame also evenly diffuses from the center to the edge from the guide frame to the outer wall of the motor stator, further improving the utilization rate of the salt spray.

[0016] During the testing process of the present invention, the motor stator is driven to rotate by the first motor, so that the motor stator is covered with salt spray more evenly.

[0017] The present invention drives the first valve hole to intermittently switch up and down through the second motor, so as to regularly control the quantitative discharge of the old salt spray. The first valve pushes and pulls the second valve to move back and forth through the guide groove, so as to regularly control the suspension of the generation of the new salt spray. On the basis of improving the utilization rate of the salt spray concentration, the salt spray concentration is kept within the test range as much as possible, and the stability of the salt spray concentration is maintained.

[0018] When the first fan blows, the limiting rod is pushed by the rotating plate to slide leftward to block the cover plate, so that the cover plate cannot be opened during the testing process. When the first fan stops blowing, it is automatically unlocked, so that the cover plate can only be opened when the testing work stops, preventing the cover plate from being accidentally opened during the testing process. Description of the Drawings

[0019] Figure 1 It is a three-dimensional structure schematic diagram of the present invention.

[0020] Figure 2 It is a sectional view of the three-dimensional structure of the present invention.

[0021] Figure 3 It is a three-dimensional structure schematic diagram of components such as the air compressor, the first fan and the pneumatic nozzle of the present invention.

[0022] Figure 4 It is a three-dimensional structure schematic diagram of components such as the first fan, the pneumatic nozzle and the rotating frame of the present invention.

[0023] Figure 5 It is a three-dimensional structure schematic diagram of the rotating frame and the limiting block of the present invention.

[0024] Figure 6 It is a three-dimensional structure schematic diagram of the rotating frame and the guide frame of the present invention.

[0025] Figure 7 This is a three-dimensional structure schematic diagram of the first motor, the first fixed tooth and the second fixed tooth of the present invention.

[0026] Figure 8 This is a three-dimensional structure schematic diagram of components such as the second motor, the first valve and the second valve of the present invention.

[0027] Figure 9 This is a three-dimensional structure schematic diagram of the air compressor and the second valve of the present invention.

[0028] Figure 10 This is a three-dimensional structure schematic diagram of components such as the cover plate, the rotating plate and the limiting rod of the present invention.

[0029] Figure 11 This is a three-dimensional structure schematic diagram of components such as the connecting frame, the rotating plate and the limiting rod of the present invention.

[0030] Names and serial numbers of components in the figure: 101, salt spray chamber; 102, cover plate; 103, circulation frame; 104, drain pipe; 105, connecting frame; 106, air compressor; 107, first fan; 108, pneumatic nozzle; 109, rotating frame; 110, second fan; 111, limiting block; 112, first valve; 113, first valve hole; 201, diversion frame; 301, first motor; 302, first fixed tooth; 303, second fixed tooth; 401, second motor; 402, second valve; 403, guide groove; 404, second valve hole; 501, rotating plate; 502, limiting rod. Specific embodiments

[0031] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] Embodiment 1: A salt spray resistance test device for a motor stator, as Figures 1 - 5As shown in the figure, it includes a salt spray chamber 101. A test chamber is opened in the middle of the upper side inside the salt spray chamber 101. A cover plate 102 is rotatably connected to the top of the salt spray chamber 101. A circulation rack 103 is fixedly connected to the left side inside the salt spray chamber 101. A first channel and a second channel are arranged inside the circulation rack 103. A drain pipe 104 is connected to the lower part of the circulation rack 103. The drain pipe 104 is used to discharge the salt water condensed into the liquid phase out of the salt spray chamber 101. A connecting rack 105 is fixedly connected to the right side inside the salt spray chamber 101. The second channel of the circulation rack 103 is guided to the connecting rack 105. The left side of the test chamber in the salt spray chamber 101 is communicated with the circulation rack 103. The connecting rack 105 is communicated with the right side of the test chamber in the salt spray chamber 101. The connecting rack 105 is communicated with the circulation rack 103. An air compressor 106 is fixedly connected to the inside of the salt spray chamber 101. A first fan 107 is fixedly connected to the left side of the connecting rack 105. A pneumatic nozzle 108 is fixedly connected to the left side of the connecting rack 105. The pneumatic nozzle 108 is located to the left of the first fan 107. The first fan 107 is used to blow the salt spray ejected by the pneumatic nozzle 108 into the test chamber. The pneumatic nozzle 108 is provided with a salt solution inlet and a compressed air inlet. The compressed air inlet of the pneumatic nozzle 108 is communicated with the air compressor 106 through a pipeline. A rotating rack 109 is rotatably connected to the inside of the test chamber in the salt spray chamber 101. The rotating rack 109 is communicated with the circulation rack 103. The first channel of the circulation rack 103 is guided to the inner bottom of the rotating rack 109. A circumferentially distributed placement groove is opened at the top of the rotating rack 109. A second fan 110 is fixedly connected to one side of the circulation rack 103 close to the rotating rack 109. The second fan 110 is used to suck the salt spray flowing in the test chamber into the circulation rack 103. A circumferentially distributed limiting block 111 is fixedly connected to the upper part of the rotating rack 109. The placement grooves of the rotating rack 109 correspond to the limiting blocks 111 one by one. Open the cover plate 102, place the motor stator on the limiting blocks 111 in the respective placement grooves of the rotating rack 109. The limiting blocks 111 are provided with circumferentially evenly distributed filter holes. The salt spray passes upward through the filter holes, so as to penetrate into the inner ring of the motor stator. A first valve 112 is rotatably connected to the right side of the second channel of the circulation rack 103. A first valve hole 113 is opened in the right part of the first valve 112. The first valve hole 113 faces the connecting rack 105.

[0033] As Figure 6 shown, it further includes a diversion rack 201. The diversion rack 201 is fixedly connected to the middle inside the rotating rack 109. The diversion rack 201 is used to evenly diffuse the salt spray from the center of the rotating rack 109 to the edge onto the motor stator.

[0034] First, store the prepared salt solution (usually 5% NaCl aqueous solution with a pH value between 6.5 and 7.2) in an external liquid storage tank, and use an external pump (such as a diaphragm pump or a peristaltic pump) to transport the salt solution from the storage tank to the salt solution inlet of the pneumatic nozzle 108. Then, open the cover plate 102, place each motor stator to be tested on the limit block 111 in each placement groove of the rotating rack 109 in the salt spray chamber 101, close the cover plate 102, and then start the air compressor 106 to generate high-pressure clean air, which is transported through a pipeline to the compressed air inlet of the pneumatic nozzle 108. Start the pneumatic nozzle 108, and the compressed air and the salt solution are fully mixed in the internal mixing chamber of the pneumatic nozzle 108 to form fine droplets. The mixed gas is ejected through the spray holes at the end of the pneumatic nozzle 108 to form a uniform salt mist, which is sprayed into the salt spray chamber 101. Start the first fan 107 and the second fan 110. The first fan 107 blows the salt mist to the left, so that the salt mist covers the motor stator. In this way, the salt spray resistance test of the motor stator is carried out to simulate the actual working environment and evaluate its corrosion resistance in a saline and humid environment to ensure safety and reliability. The second fan 110 then sucks the salt mist flowing to the left side of the rotating rack 109 into the first channel of the circulation rack 103. Part of the salt mist flows upward along the first channel into the rotating rack 109 and penetrates into the inner wall of the inner ring of the motor stator through the filter holes of the limit block 111. In this way, by expanding the salt mist coverage rate, the range of the motor stator to be tested is expanded, avoiding the situation that the test is not representative due to the inability to cover the salt mist locally. The salt mist also diffuses uniformly from the center to the edge from the diversion rack 201 to the outer wall of the motor stator, trying to improve the utilization rate of the salt mist; another part of the salt mist enters the second channel to the right and then enters the first valve 112 to the right, and then flows upward through the first valve hole 113 into the connecting rack 105. Under the action of the first fan 107, the salt mist in the connecting rack 105 flows back to cover the motor stator in the salt spray chamber 101. In this way, the internal circulation of the salt mist is realized, which can reduce losses and improve the utilization rate of the salt mist.

[0035] As Figure 7 shown, it further includes a first motor 301. The first motor 301 is fixedly connected to one side of the salt spray chamber 101 close to the rotating rack 109. A first fixed gear 302 is fixedly connected to the lower part of the rotating rack 109, and a second fixed gear 303 is fixedly connected to the output shaft of the first motor 301. The second fixed gear 303 meshes with the first fixed gear 302.

[0036] During the test, start the first motor 301. The output shaft of the first motor 301 drives the second fixed gear 303 to rotate, thereby driving the first fixed gear 302 to rotate, further driving the rotating rack 109 to rotate, and then driving the motor stator to rotate, so that the motor stator is more evenly covered with salt mist.

[0037] Example 2: On the basis of Example 1, as Figure 2 、Figure 8 and Figure 9 As shown, it also includes a second motor 401, the second motor 401 is fixedly connected in the salt spray chamber 101, the output shaft of the second motor 401 is fixedly connected to the first valve 112, the second valve 402 is slidably connected in the pipeline of the air compressor 106, a guide groove 403 is opened on the side of the first valve 112 close to the second valve 402, the second valve 402 is slidably connected to the guide groove 403, the second valve 402 is opened with a second valve hole 404, and when the first valve hole 113 faces the connecting frame 105, the second valve hole 404 is misaligned with the air compressor 106.

[0038] If the operation of generating new salt mist is continuously performed, the salt mist concentration will continue to increase under the internal circulation system, and the anti-salt mist test stipulates that the salt mist concentration should be maintained within a specific range (for example, 5% NaCl aqueous solution). If the concentration continues to increase, the test conditions will deviate from these standards, making the test results lose comparability and repeatability. Therefore, during the test, the second motor 401 is started, and the output shaft of the second motor 401 is controlled to drive the first valve 112 to rotate 180 degrees at a fixed time, so that the first valve hole 113 is intermittently switched up and down. When the first valve hole 113 is facing upward, the second valve hole 404 is misaligned with the pipeline of the air compressor 106, thereby suspending the operation of generating new salt mist and performing the operation of internal circulation of the old salt mist; when the first valve hole 113 is facing downward, the second valve hole 404 is aligned with the pipeline of the air compressor 106, thereby performing the operation of generating new salt mist and performing the operation of quantitatively discharging the old salt mist. In this way, the present invention drives the first valve hole 113 to switch up and down intermittently through the second motor 401, so as to regularly control the quantitative discharge of old salt mist, and the first valve 112 pushes and pulls the second valve 402 to move forward and backward through the guide groove 403, so as to regularly control the suspension of the generation of new salt mist. On the basis of improving the utilization rate of the salt mist concentration, the salt mist concentration is kept within the test range as much as possible to maintain the stability of the salt mist concentration.

[0039] Embodiment 3: Based on embodiment 2, Figure 10 and Figure 11 As shown, it also includes a rotating plate 501, which is rotatably connected to a side of the connecting frame 105 close to the first fan. The upper right part of the front side of the salt spray chamber 101 is slidably connected to a limiting rod 502 along the left and right directions. The limiting rod 502 slides to the left to lock the cover plate 102. The rotating plate 501 is used to push and pull the limiting rod 502. A movable groove is opened at the lower right part of the limiting rod 502, and the limiting rod 502 is movably connected to the rotating plate 501 through the movable groove.

[0040] When the first fan 107 blows, the rotating plate 501 swings to the left, thereby pushing the limiting rod 502 to slide to the left to block the cover plate 102, so that the cover plate 102 cannot be opened during the test process. When the first fan 107 stops blowing, the rotating plate 501 swings reversely and resets under the action of gravity, thereby pulling the limiting rod 502 to slide to the right until it disengages from the cover plate 102. In this way, the cover plate 102 can only be opened when the test work stops, preventing the cover plate 102 from being accidentally opened during the test.

[0041] The technical principles of the embodiments of the present invention have been described above in conjunction with specific embodiments. These descriptions are only for explaining the principles of the embodiments of the present invention and cannot be construed in any way as a limitation on the protection scope of the embodiments of the present invention. Based on the explanations herein, those skilled in the art can readily conceive of other specific implementation manners of the embodiments of the present invention without creative efforts, and these manners will fall within the protection scope of the embodiments of the present invention.

Claims

1. A motor stator salt spray resistance test device, characterized by: The invention comprises a salt spray chamber (101), wherein a test chamber is provided inside the salt spray chamber (101), a cover plate (102) is rotatably connected to the salt spray chamber (101), a circulation frame (103) is fixedly connected inside the salt spray chamber (101), a lower part of the circulation frame (103) is connected to a drain pipe (104) for discharging salt water condensed into a liquid phase out of the salt spray chamber (101), a connecting frame (105) is fixedly connected inside the salt spray chamber (101), a side of the test chamber away from the connecting frame (105) is connected to the circulation frame (103), the connecting frame (105) is connected to the test chamber of the salt spray chamber (101), the connecting frame (105) is connected to the circulation frame (103), an air compressor (106) is fixedly connected inside the salt spray chamber (101), a side of the connecting frame (105) close to the test chamber is fixedly connected to a first fan (107), and the connecting frame (105) close to the first fan (107) is connected to the circulation frame (103). ) is fixedly connected to one side of the chamber, the pneumatic nozzle (108) is provided with a salt solution inlet and a compressed air inlet, the compressed air inlet of the pneumatic nozzle (108) is connected to the air compressor (106) through a pipeline, a rotating frame (109) is rotatably connected in the test cavity of the salt spray chamber (101), the rotating frame (109) is connected to the circulation frame (103), a second fan (110) is fixedly connected to a side of the circulation frame (103) close to the rotating frame (109), the rotating frame (109) is fixedly connected to a circumferentially distributed limit block (111), the limit block (111) is provided with filter holes evenly distributed in the circumferential direction, and a first valve (112) is rotatably connected to a side of the circulation frame (103) close to the connecting frame (105), the first valve (112) is provided with a first valve hole (113), and the first valve hole (113) faces the connecting frame (105).

2. The motor stator salt spray resistance test device according to claim 1 is characterized in that: The rotating frame (109) is provided with placement grooves distributed in the circumferential direction, and the placement grooves of the rotating frame (109) correspond one to one with the limit blocks (111).

3. The motor stator salt spray resistance test device according to claim 2 is characterized in that: A first channel and a second channel are arranged inside the circulation frame (103), the first channel leads to the inner bottom of the rotating frame (109), and the second channel leads to the connecting frame (105).

4. The motor stator salt spray resistance testing device according to claim 3 is characterized in that: It also includes a flow guide frame (201), which is fixed to the middle of the rotating frame (109). The flow guide frame (201) is used to evenly diffuse the salt mist from the center of the rotating frame (109) to the edge onto the motor stator.

5. The motor stator salt spray resistance test device according to claim 4 is characterized in that: It also includes a first motor (301), the first motor (301) is fixedly connected in the salt spray chamber (101), the rotating frame (109) is fixedly connected with a first fixed tooth (302), the output shaft of the first motor (301) is fixedly connected with a second fixed tooth (303), and the second fixed tooth (303) is meshed with the first fixed tooth (302).

6. The motor stator salt spray resistance testing device according to claim 5 is characterized in that: The invention also includes a second motor (401), the second motor (401) is fixedly connected in the salt spray chamber (101), the output shaft of the second motor (401) is fixedly connected to the first valve (112), the second valve (402) is slidably connected in the pipeline of the air compressor (106), a guide groove (403) is formed on a side of the first valve (112) close to the second valve (402), the second valve (402) is slidably connected to the guide groove (403), the second valve (402) is formed with a second valve hole (404), and when the first valve hole (113) faces the connecting frame (105), the second valve hole (404) is misaligned with the air compressor (106).

7. The motor stator salt spray resistance testing device according to claim 6 is characterized in that: It also includes a rotating plate (501), which is rotatably connected to a side of the connecting frame (105) close to the first fan. The salt spray chamber (101) is slidably connected to a limiting rod (502) for locking the cover plate (102), and the rotating plate (501) is used to push and pull the limiting rod (502).

8. The motor stator salt spray resistance testing device according to claim 7 is characterized in that: The limiting rod (502) is provided with a movable groove, and the limiting rod (502) is movably connected to the rotating plate (501) via the movable groove.

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