Motor stator salt spray resistance testing device

Abstract

The invention discloses a motor stator salt mist resistance testing device, and relates to the technical field of salt mist resistance testing, the motor stator salt mist resistance testing device comprises a salt mist chamber, a testing cavity is arranged in the salt mist chamber, the salt mist chamber is rotatably connected with a cover plate, a circulation frame is fixedly connected in the salt mist chamber, and the lower part of the circulation frame is communicated with a liquid discharge pipe for discharging salt water condensed into a liquid phase out of the salt mist chamber; a connecting frame is fixedly connected inside the salt mist chamber, one side, far away from the connecting frame, of the testing cavity is communicated with the circulating frame, the connecting frame is communicated with the testing cavity of the salt mist chamber, an air compressor is fixedly connected inside the salt mist chamber, one side, close to the testing cavity, of the connecting frame is fixedly connected with a first fan, and one side, close to the first fan, of the connecting frame is fixedly connected with a pneumatic nozzle. Part of salt mist flows upwards into the rotating frame along the first channel and permeates into the inner wall of the inner ring of the motor stator from the filtering holes of the limiting block, so that the tested range of the motor stator is expanded by expanding the salt mist coverage rate, and the situation that the test is not representative due to the fact that the salt mist cannot be covered locally is avoided.

Description

Technical Field

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

[0002] Motor stators are usually made of metals (such as iron and copper) and insulating materials (such as enameled wire and insulating paper). These materials are susceptible to corrosion in humid and salty environments, affecting their mechanical strength and electrical properties. Through salt spray resistance testing, this extreme environment can be simulated, the performance of motor stators under long-term exposure to salt spray conditions can be predicted, and the corrosion resistance of these materials in harsh environments can be evaluated to ensure that the motor can operate stably and for a long time in harsh environments.

[0003] Currently on the market, the motor stator is usually fixed in a static salt spray chamber, and salt spray is sprayed into the chamber through a nozzle to simulate a corrosive 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. The test of the internal structure (such as the inner ring of the stator) is relatively weak, resulting in the failure to fully verify the corrosion resistance of the internal structure. Partially uncovered areas may cause the test results to be unrepresentative and unable to truly reflect the overall corrosion resistance of the stator. Certain key parts have not been fully tested, which may lead to design defects that are not discovered in time, increasing the risk of failure in actual applications. In addition, in the existing technology, most of the salt spray is directly discharged after entering the test box, and it cannot be effectively utilized, resulting in a waste of resources.

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

[0005] In order to overcome the shortcomings mentioned in the above background technology, the present invention provides a motor stator salt spray resistance testing device.

[0006] A motor stator anti-salt spray test device comprises a salt spray chamber, a test cavity is opened 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 lower part of the circulation frame is connected with a drain pipe for discharging brine condensed into a liquid phase out of the salt spray chamber, a connecting frame is fixedly connected inside the salt spray chamber, a side of the test cavity away from the connecting frame is connected with the circulation frame, the connecting frame is connected with the test cavity of the salt spray chamber, the connecting frame is connected with the circulation frame, an air compressor is fixedly connected inside the salt spray chamber, a first fan is fixedly connected to a side of the connecting frame close to the test cavity, and a first fan is fixedly connected to a side of the connecting frame close to the first fan. A pneumatic nozzle is fixedly connected to one side of a fan, and the pneumatic nozzle is provided with a salt solution inlet and a compressed air inlet. The compressed air inlet of the pneumatic nozzle is connected to the air compressor through a pipeline. A rotating frame is rotatably connected in the test cavity of the salt spray chamber, and the rotating frame is connected to the circulation frame. A second fan is fixedly connected to a side of the circulation frame close to the rotating frame, and the rotating frame is fixed with circumferentially distributed limit blocks, and the limit blocks are provided with circumferentially evenly distributed filter holes. A first valve is rotatably connected to a side of the circulation frame close to the connecting frame, and 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 one-to-one to the limit blocks.

[0008] Preferably, a first channel and a second channel are provided inside the circulation frame, the first channel leads to the bottom of the rotating frame, and the second channel leads to the connecting frame.

[0009] Preferably, a guide frame is further included, which is fixed to the middle of the rotating frame and is used to evenly diffuse the salt mist from the center to the edge of the rotating frame onto the motor stator.

[0010] Preferably, the first motor is further included, the first motor is fixedly connected to the salt spray chamber, the rotating frame is fixedly connected to a first fixed tooth, the output shaft of the first motor is fixedly connected to a second fixed tooth, and the second fixed tooth is meshed with the first fixed tooth.

[0011] Preferably, a second motor is further included, the second motor is fixedly connected to the salt spray chamber, the output shaft of the second motor is fixedly connected to the first valve, the second valve is slidably connected in the pipeline of the air compressor, a guide groove is provided on the side of the first valve close to the second valve, the second valve is slidably connected to the guide groove, the second valve is provided with a second valve hole, and when the first valve hole faces the connecting frame, the second valve hole is misaligned with the air compressor.

[0012] Preferably, a rotating plate is further included, which is rotatably connected to a side of the connecting frame close to the first fan, and the salt spray chamber is slidably connected to a limiting rod for locking the cover plate, and the rotating plate is used to push and pull the limiting rod.

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

[0014] The present invention has the following advantages: a part of the salt mist flows upward into the rotating frame along the first channel, and penetrates into the inner wall of the inner ring of the motor stator from the filter hole of the limit block. In this way, the coverage of the salt mist is expanded, the tested range of the motor stator is expanded, and the test is not representative due to the inability to cover the salt mist locally.

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

[0016] During the test process of the present invention, the first motor drives the motor stator to rotate, so that the motor stator is more evenly covered with salt mist.

[0017] The present invention drives the first valve hole to switch up and down intermittently by the second motor, so as to regularly control the quantitative discharge of old salt mist, and the first valve pushes and pulls the second valve to move forward and backward through the guide groove, 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, and the stability of the salt mist concentration is maintained.

[0018] When the first fan is blowing, the present invention pushes the limit rod to slide leftward to clamp the cover plate by the rotating plate, so that the cover plate cannot be opened during the test work. When the first fan stops blowing, it is automatically unlocked, so that the cover plate can be opened only when the test work is stopped, thereby preventing the cover plate from being accidentally opened during the test. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

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

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

[0026] Figure 8 It is a three-dimensional structural schematic diagram of the second motor, the first valve, the second valve and other components of the present invention.

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

[0028] Fig.10 It is a schematic diagram of the three-dimensional structure of the cover plate, rotating plate, limiting rod and other components of the present invention.

[0029] Fig.11 It is a three-dimensional structural schematic diagram of the connecting frame, rotating plate, limiting rod and other components of the present invention.

[0030] Names and serial numbers of parts 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, limit block, 112, first valve, 113, first valve hole, 201, guide 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, limit rod. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] Embodiment 1: A motor stator salt spray resistance test device, such as Figure 1-Figure 5As shown, a salt spray chamber 101 is included, a test cavity is provided in the middle of the upper side of the salt spray chamber 101, a cover plate 102 is rotatably connected to the top of the salt spray chamber 101, a circulation frame 103 is fixedly connected to the left side of the salt spray chamber 101, a first channel and a second channel are arranged inside the circulation frame 103, a drain pipe 104 is connected to the lower part of the circulation frame 103, and the drain pipe 104 is used to discharge the brine condensed into a liquid phase out of the salt spray chamber 101, a connecting frame 105 is fixedly connected to the right side of the salt spray chamber 101, the second channel of the circulation frame 103 guides the connecting frame 105, and the salt spray chamber The left side of the test chamber of 101 is connected to the circulation frame 103, the connecting frame 105 is connected to the right side of the test chamber of the salt spray chamber 101, the connecting frame 105 is connected to the circulation frame 103, the inside of the salt spray chamber 101 is fixedly connected with an air compressor 106, the left side of the connecting frame 105 is fixedly connected with a first fan 107, the left side of the connecting frame 105 is fixedly connected with a pneumatic nozzle 108, the pneumatic nozzle 108 is located to the left of the first fan 107, the first fan 107 is used to blow the salt mist sprayed by the pneumatic nozzle 108 into the test chamber, and the pneumatic nozzle 108 is provided with a salt solution 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. The first channel of the circulation frame 103 guides the bottom of the rotating frame 109. The top of the rotating frame 109 is provided with circumferentially distributed placement grooves. A second fan 110 is fixedly connected to one side of the circulation frame 103 near the rotating frame 109. The second fan 110 is used to suck the salt mist flowing in the test cavity into the circulation frame 103. The upper part of 109 is fixedly connected with circumferentially distributed limit blocks 111, and the placement grooves of the rotating frame 109 correspond one to one with the limit blocks 111. The cover plate 102 is opened, and the motor stator is placed on the limit blocks 111 in each placement groove of the rotating frame 109. The limit blocks 111 are provided with filter holes evenly distributed circumferentially. The salt mist passes through the filter holes upward and penetrates into the inner ring of the motor stator. The second channel of the circulation frame 103 is rotatably connected with the first valve 112 on the right side. The first valve hole 113 is provided on the right side of the first valve 112, and the first valve hole 113 faces the connecting frame 105.

[0033] like Figure 6 As shown, a guide frame 201 is also included. The guide frame 201 is fixed to the middle of the rotating frame 109. The guide frame 201 is used to evenly diffuse the salt mist from the center to the edge of the rotating frame 109 to the motor stator.

[0034] First, a prepared salt solution (usually a 5% NaCl aqueous solution with a pH value between 6.5 and 7.2) is stored in an external liquid storage tank, and the salt solution is transported from the liquid storage tank to the salt solution inlet of the pneumatic nozzle 108 through an external pump (such as a diaphragm pump or a peristaltic pump). Then, the cover 102 is opened, and each motor stator to be tested is placed on the limit block 111 in each placement slot of the rotating frame 109 in the salt spray chamber 101. The cover 102 is closed, and the air compressor 106 is started to generate high-pressure cleaning. The clean air is transported to the compressed air inlet of the pneumatic nozzle 108 through a pipeline, the pneumatic nozzle 108 is started, the compressed air and the salt solution are fully mixed in the mixing chamber inside the pneumatic nozzle 108 to form fine droplets, and the mixed gas is sprayed out through the spray hole at the end of the pneumatic nozzle 108 to form a uniform salt mist, which is sprayed into the salt mist chamber 101, and the first fan 107 and the second fan 110 are started. The first fan 107 blows the salt mist to the left so that the salt mist covers the motor stator. In this way, the motor stator is The salt spray resistance test is carried out to simulate the actual working environment, evaluate its corrosion resistance in a salty and humid environment, and ensure safety and reliability. The second fan 110 then sucks the salt spray flowing to the left side of the rotating frame 109 into the first channel of the circulation frame 103, and a part of the salt spray flows upward along the first channel into the rotating frame 109, and penetrates from the filter hole of the limit block 111 to the inner wall of the inner ring of the motor stator. In this way, by expanding the coverage of the salt spray, the range of the motor stator to be tested is expanded, and the test is not representative due to the inability to cover the salt spray locally. It is also evenly diffused from the center to the edge from the guide frame 201 to the outer wall of the motor stator, and the utilization rate of the salt spray is improved as much as possible; another part of the salt spray enters the second channel to the right, and enters the first valve 112 to the right, and then flows upward to the connecting frame 105 through the first valve hole 113. Under the action of the first fan 107, the salt spray in the connecting frame 105 flows back and covers the motor stator in the salt spray chamber 101, so that the internal circulation of the salt spray is realized, the loss can be reduced, and the utilization rate of the salt spray is improved.

[0035] like Figure 7 As shown, it also includes a first motor 301, which is fixedly connected to a side of the salt spray chamber 101 close to the rotating frame 109, and a first fixed tooth 302 is fixedly connected to the lower part of the rotating frame 109, and a second fixed tooth 303 is fixedly connected to the output shaft of the first motor 301, and the second fixed tooth 303 is meshed with the first fixed tooth 302.

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

[0037] Embodiment 2: Based on embodiment 1, Figure 2 , Figure 8 and Fig. 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, Fig.10 and Fig.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 limit rod 502 to slide to the left and clamp the cover 102, so that the cover 102 cannot be opened during the test. When the first fan 107 stops blowing, the rotating plate 501 swings in the opposite direction and resets under the action of gravity, thereby pulling the limit rod 502 to slide to the right to disengage from the cover 102. In this way, the cover 102 can be opened only when the test is stopped, preventing the cover 102 from being accidentally opened during the test.

[0041] The technical principles of the embodiments of the present invention are 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 interpreted in any way as limiting the protection scope of the embodiments of the present invention. Based on the explanations herein, those skilled in the art can think of other specific implementation methods of the embodiments of the present invention without creative work, and these methods 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 testing 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: The invention also comprises a flow guide frame (201), which is fixedly connected to the middle of the rotating frame (109), and is used to evenly diffuse the salt mist from the center to the edge of the rotating frame (109) 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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