A vacuum pump professional water-cooled variable frequency motor vacuum internal pressure test system

Abstract

The application belongs to the technical field of motor testing, and discloses a vacuum pump professional water-cooled variable-frequency motor vacuum internal pressure testing system, which comprises a workbench, the upper surface of the workbench is provided with a mounting groove, a motor body is arranged in the mounting groove, a junction box is arranged on the side wall of the motor body, the upper surface of the workbench is provided with a pressure-withstanding instrument for injecting high pressure into the motor body, the upper surface of the workbench is provided with a vacuum pump, the upper surface of the workbench is provided with a power supply, the power supply is electrically connected with the vacuum pump, and the power supply is electrically connected with the pressure-withstanding instrument. The application has the effect of reducing the difficulty of detecting the air bubble condition in the glue injection liquid for the staff.

Description

Technical Field

[0001] This invention relates to the field of motor testing technology, and in particular to a vacuum internal pressure testing system for a professional water-cooled variable frequency motor for vacuum pumps. Background Technology

[0002] A vacuum pump is a device or equipment that uses mechanical, physical, chemical, or physicochemical methods to evacuate a container and create a vacuum. In simpler terms, a vacuum pump is a device that uses various methods to improve, generate, and maintain a vacuum in a closed space. To better achieve the desired vacuum effect, the vacuum pump is usually driven by connecting it to a variable frequency motor. Currently, to improve the stability of motor operation, many factories use glue to fill the motor to enhance its performance.

[0003] When workers inject potting compound into the motor, it is difficult to completely expel the gas inside, and some of the compound can easily become filled with air bubbles. If the motor is powered on while the compound is filled with air bubbles, electrical sparks can easily be generated inside the motor and splatter everywhere, potentially leading to a breakdown. To reduce the probability of motor damage, workers need to test the potting compound. However, because structures such as the stator windings can easily obstruct the flow of the compound, testing is quite difficult. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a professional water-cooled variable frequency motor vacuum internal pressure testing system for vacuum pumps.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a vacuum pump professional water-cooled variable frequency motor vacuum internal pressure testing system, including a workbench, an installation groove is provided on the upper surface of the workbench, a motor body is arranged in the installation groove, a junction box is arranged on the side wall of the motor body, a withstand voltage tester for injecting high pressure into the motor body is arranged on the upper surface of the workbench, a vacuum pump is arranged on the upper surface of the workbench, a power supply is arranged on the upper surface of the workbench, the power supply is electrically connected to the vacuum pump, and the power supply is electrically connected to the withstand voltage tester.

[0006] By adopting the above technical solution, when workers are producing motors, in order to improve the stability of motor operation, the stator windings need to be tightly connected to the motor housing. At this time, workers need to inject potting compound into the motor. Subsequently, workers need to test the potting compound and the stator windings. If there are air bubbles in the potting compound or damaged parts in the stator windings, applying high voltage to the motor in a semi-vacuum state can easily cause corona collisions, leading to electric sparks flying inside the motor and potentially causing breakdown. In this case, workers need to turn on the vacuum pump to create a semi-vacuum state for the motor body and start the withstand voltage tester to apply high voltage to the motor, thus creating a good testing environment. If the motor does not break down, the potting compound and the stator windings are in normal condition, and there are no air bubbles in the potting compound. If electric sparks fly inside the motor, drifting around in the vacuum, accompanied by breakdown, there are air bubbles in the potting compound or damage to the stator windings.

[0007] Previously, without this testing method, breakdown was prone to occur whenever workers continuously performed motor production operations (i.e., applying internal pressure to the motor while it was in a semi-vacuum state), and workers could not determine the cause of this phenomenon. By investigating the cause, workers can accurately detect whether there are air bubbles in the potting compound, thereby improving the user experience.

[0008] Furthermore, a limiting groove is provided on the side wall of the mounting slot, and a fixing mechanism for fixing the motor body is provided on the worktable. The fixing mechanism includes a limiting component set on the worktable for limiting the motor body and a switch component set on the worktable for controlling the opening and closing of the limiting component.

[0009] By adopting the above technical solution, when workers need to test the motor, they need to keep the motor body vertical and connect it to the withstand voltage tester. To keep the motor body stable, workers need to connect the motor body to the mounting slot and activate the limit component, which will keep the motor body stable. This eliminates the need for workers to continuously apply a force to keep the motor body stable, thus reducing the difficulty of operation.

[0010] Furthermore, the limiting assembly includes a mounting plate fixed to the bottom surface of the motor body, a limiting rod slidably disposed in the limiting groove, and a limiting spring with one end fixed to the side wall of the limiting rod away from the motor body. The other end of the limiting spring is fixed to the inner wall of the limiting groove away from the motor body. The mounting plate has a limiting hole on the side wall near the limiting groove that matches the limiting rod.

[0011] By adopting the above technical solution, when workers need to inspect the motor, they must connect the mounting plate to the motor body and align the bottom surface of the mounting plate with the mounting groove. This allows the mounting plate to slide within the mounting groove. Then, the workers must slide the mounting plate downwards, causing the motor body to move downwards with it. During this process, the workers must manually slide the limit rod until it is fully inserted into the limit groove. When the limit groove aligns with the limit hole, the limit rod, under the action of the limit spring, moves away from the limit groove and eventually connects with the limit hole, thus limiting the mounting plate and stabilizing the motor body.

[0012] Furthermore, a first inclined surface is formed on the edge where the upper surface of the limiting rod intersects with the side wall near the mounting plate.

[0013] By adopting the above technical solution, when the operator slides the mounting plate downwards, the bottom surface of the mounting plate presses against the first inclined surface, thereby causing the limiting rod to move completely into the limiting groove under the action of the mounting plate. Subsequently, when the limiting groove aligns with the limiting hole, the limiting rod moves away from the limiting groove under the action of the limiting spring and finally connects with the limiting hole. This eliminates the need for the operator to manually slide the limiting rod, thus reducing the difficulty of operation.

[0014] Furthermore, each of the four inner walls of the mounting groove is provided with a sliding groove, and the switch assembly includes a slider that is slidably disposed in the sliding groove and a mounting ring that is mounted together on the side walls of the four sliders that are close to each other.

[0015] By adopting the above technical solution, after the motor body inspection is completed, the staff needs to remove the motor body. At this time, the staff needs to slide the mounting ring downwards, so that the mounting ring is pressed against the first inclined surface, thereby causing the limiting rod to move back into the limiting groove, and thus separating the limiting rod from the mounting plate.

[0016] Furthermore, a switch spring is fixed to the bottom surface of the slider, and the other end of the switch spring is fixed to the inner bottom wall of the slide groove.

[0017] By adopting the above technical solution, when the operator releases the mounting ring, the slider is reset under the action of the switch spring, which causes the mounting ring to move upward with the slider. This eliminates the need for the operator to manually reset the mounting ring, thus reducing the difficulty of operation for the operator.

[0018] Furthermore, a clamping block is fixed on the side wall of the motor body, and a second inclined surface is formed on the edge of the bottom surface of the clamping block where it intersects with the side wall away from the motor body.

[0019] By adopting the above technical solution, when the operator slides the mounting plate downwards, the motor and the clamping block slide downwards along with the mounting plate, thereby causing the clamping block to press against the second inclined surface. This gradually increases the force between the mounting ring and the inner wall of the mounting groove, thus keeping the mounting ring stable and reducing the probability of continuous vibration of the mounting ring during motor testing.

[0020] Furthermore, a rubber sheet is provided on the upper end of the outer wall of the mounting ring.

[0021] By adopting the above technical solution, the rubber has good elasticity, and the rubber sheet made of rubber increases the upper limit of the maximum static friction force between the mounting ring and the inner wall of the mounting groove, thereby improving the stability of the mounting ring.

[0022] Furthermore, the side wall of the mounting ring is provided with mounting blocks to reduce the difficulty for workers to slide the mounting ring.

[0023] Furthermore, the upper end of the inner wall of the mounting ring is provided with a rounded corner.

[0024] By adopting the above technical solution, the difficulty for staff to pass the mounting plate through the mounting ring is reduced, thereby improving the user experience for staff.

[0025] In summary, the present invention has the following beneficial effects:

[0026] 1. In this application, when workers are producing an electric motor, to improve the stability of motor operation, they need to ensure a tight connection between the stator winding and the motor housing. At this time, workers need to inject potting compound into the motor. Subsequently, workers need to test the potting compound and the stator winding. Because if there are air bubbles in the potting compound or damaged parts in the stator winding, applying high voltage to the motor in a semi-vacuum state can easily cause corona discharge, leading to sparks flying inside the motor and potentially causing breakdown. Therefore, workers need to turn on the vacuum pump to create a semi-vacuum state for the motor body and start the withstand voltage tester to apply high voltage to the motor, thus creating a suitable testing environment. If the motor does not break down, both the potting compound and the stator winding are in normal condition, and there are no air bubbles in the potting compound. If sparks fly inside the motor, drifting in the vacuum, and accompanied by breakdown, then there are air bubbles in the potting compound or damage to the stator winding.

[0027] Previously, without this testing method, breakdown was prone to occur whenever workers continuously performed motor production operations (i.e., applying internal pressure to the motor while it was in a semi-vacuum state), and workers could not determine the cause of this phenomenon. By investigating the cause, workers can accurately detect whether there are air bubbles in the potting compound, thereby improving the user experience.

[0028] 2. In this application, when the operator needs to test the motor, the operator needs to make the motor body vertical and connect the motor body to the withstand voltage tester. In order to keep the motor body stable, the operator needs to connect the motor body to the mounting slot and activate the limit component, which can keep the motor body stable without the operator continuously applying a force to keep the motor body stable, thereby reducing the difficulty of operation for the operator;

[0029] 3. In this application, when the operator needs to inspect the motor, the operator must connect the mounting plate to the motor body and connect the bottom surface of the mounting plate to the mounting groove. This allows the mounting plate to slide within the mounting groove. Then, the operator must slide the mounting plate downwards, causing the motor body to move downwards with the mounting plate. During this process, the operator must manually slide the limiting rod until it is fully moved into the limiting groove. When the limiting groove aligns with the limiting hole, the limiting rod, under the action of the limiting spring, moves away from the limiting groove and eventually connects with the limiting hole, thereby limiting the mounting plate and stabilizing the motor body. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the fixing mechanism and its connection structure according to an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the limiting groove and its connection structure according to an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the limiting hole and its connection structure according to an embodiment of the present invention.

[0034] In the diagram: 1. Workbench; 11. Mounting slot; 2. Motor body; 21. Junction box; 22. Withstand voltage tester; 3. Vacuum pump; 31. Power supply; 32. Limiting slot; 4. Fixing mechanism; 5. Limiting assembly; 51. Mounting plate; 52. Limiting rod; 53. Limiting spring; 54. Limiting hole; 55. Slide groove; 6. Switch assembly; 61. Slider; 62. Mounting ring; 7. First inclined surface; 8. Switch spring; 81. Clamping block; 82. Second inclined surface; 83. Rubber sheet; 9. Mounting block. Detailed Implementation

[0035] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0036] like Figure 1-4 As shown in the figure, this application discloses a vacuum pump professional water-cooled variable frequency motor vacuum internal pressure testing system, including a workbench 1, a motor body 2, a junction box 21, a withstand voltage tester 22, a vacuum pump 3, a power supply 31, a fixing mechanism 4, a switch spring 8, and a clamping block 81. The workbench 1 consists of a table surface and legs. The table surface is a horizontally placed rectangular plate structure, and the legs are vertically placed rectangular rod structures. The legs are fixed to the bottom surface of the table surface, and there are four legs arranged in a rectangular array. A mounting groove 11 is opened on the upper surface of the workbench 1, and the motor body 2 is placed in the mounting groove 11. The junction box 21 is set on the side wall of the motor body 2, and the withstand voltage tester 22 is set on the upper surface of the workbench 1 for injecting high pressure into the motor body 2. The vacuum pump 3 is set on the upper surface of the workbench 1 for creating a vacuum environment. The power supply 31 is set on the upper surface of the workbench 1 and is electrically connected to the vacuum pump 3 and the withstand voltage tester 22.

[0037] A limiting groove 32 is formed on the side wall of the mounting groove 11. A fixing mechanism 4 is set on the workbench 1 for fixing the motor body 2. The fixing mechanism 4 includes a limiting component 5 and a switch component 6. The limiting component 5 is set on the workbench 1 for limiting the motor body 2. The limiting component 5 includes a mounting plate 51, a limiting rod 52, and a limiting spring 53. The mounting plate 51 is a rectangular plate structure and is fixed to the bottom surface of the motor body 2. The limiting rod 52 is a rectangular rod structure and is slidably set in the limiting groove 32. A limiting hole 54 matching the limiting rod 52 is formed on the side wall of the mounting plate 51 near the limiting groove 32. One end of the limiting spring 53 is fixed to the side wall of the limiting rod 52 away from the motor body 2, and the other end of the limiting spring 53 is fixed to the inner wall of the limiting groove 32 away from the motor body 2.

[0038] When the operator needs to test the motor, they must connect the mounting plate 51 to the motor body 2 and align the bottom surface of the mounting plate 51 with the mounting groove 11. This allows the mounting plate 51 to slide within the mounting groove 11. The operator then slides the mounting plate 51 downwards, causing the motor body 2 to move downwards with it. During this process, the operator must manually slide the limiting rod 52 until it is fully inserted into the limiting groove 32. When the limiting groove 32 aligns with the limiting hole 54, the limiting rod 52, under the action of the limiting spring 53, moves away from the limiting groove 32 and eventually connects with the limiting hole 54. This limits the mounting plate 51, thus stabilizing the motor body 2.

[0039] To reduce the difficulty of operation for staff, a first inclined surface 7 is provided on the edge where the upper surface of the limit rod 52 intersects with the side wall near the mounting plate 51.

[0040] When the operator slides the mounting plate 51 downwards, the bottom surface of the mounting plate 51 presses against the first inclined surface 7, thereby causing the limiting rod 52 to move completely into the limiting groove 32 under the action of the mounting plate 51. Subsequently, when the limiting groove 32 is aligned with the limiting hole 54, the limiting rod 52 moves away from the limiting groove 32 under the action of the limiting spring 53 and finally connects with the limiting hole 54. This eliminates the need for the operator to manually slide the limiting rod 52, thus reducing the difficulty of operation.

[0041] The mounting groove 11 has four inner walls with sliding grooves 55. The switch assembly 6 is mounted on the worktable 1 and is used to control the opening and closing of the limit assembly 5. The switch assembly 6 includes a slider 61 and a mounting ring 62. The slider 61 is a rectangular block structure and is slidably mounted in the sliding groove 55. The mounting ring 62 is a plate structure with a square ring cross-section, and the mounting ring 62 is fixed to the side walls of the four sliders 61 that are close to each other.

[0042] After the motor body 2 has been inspected, the staff needs to remove the motor body 2. At this time, the staff needs to slide the mounting ring 62 downward, so that the mounting ring 62 is pressed against the first inclined surface 7, thereby causing the limiting rod 52 to move back into the limiting groove 32, and thus causing the limiting rod 52 to separate from the mounting plate 51.

[0043] One end of the switch spring 8 is fixed to the bottom surface of the slider 61, and the other end of the switch spring 8 is fixed to the inner bottom wall of the slide groove 55.

[0044] When the operator releases the mounting ring 62, the slider 61 is reset by the action of the switch spring 8, which causes the mounting ring 62 to move upward with the slider 61. This eliminates the need for the operator to manually reset the mounting ring 62, thus reducing the difficulty of operation.

[0045] The clamping block 81 is a rectangular block structure. The clamping block 81 is fixed on the side wall of the motor body 2, and a second inclined surface 82 is provided on the edge where the bottom surface of the clamping block 81 intersects with the side wall away from the motor body 2.

[0046] When the operator slides the mounting plate 51 downwards, the motor and the clamping block 81 slide downwards along with the mounting plate 51, thereby causing the clamping block 81 to press against the second inclined surface 82. This gradually increases the force between the mounting ring 62 and the inner wall of the mounting groove 11, thus keeping the mounting ring 62 stable and reducing the probability of continuous vibration of the mounting ring 62 during motor testing.

[0047] To improve the stability of the mounting ring 62, a rubber sheet 83 is provided on the upper end of the outer wall of the mounting ring 62. Rubber has good elasticity, and the rubber sheet 83, made of rubber, increases the upper limit of the maximum static friction force between the mounting ring 62 and the inner wall of the mounting groove 11, thereby improving the stability of the mounting ring 62.

[0048] To reduce the difficulty for workers to slide the installation ring 62, an installation block 9 is provided on the side wall of the installation ring 62.

[0049] To reduce the difficulty for workers to pass the mounting plate 51 through the mounting ring 62 and thus improve the user experience, the upper end of the inner wall of the mounting ring 62 is provided with rounded corners.

[0050] The operating principle of the vacuum pump 3 professional water-cooled variable frequency motor vacuum internal pressure testing system in this embodiment is as follows: When workers are producing motors, in order to improve the stability of motor operation, they need to ensure that the stator windings are tightly connected to the motor housing. At this time, workers need to inject potting compound into the motor. Subsequently, workers need to test the potting compound and the stator windings. If there are air bubbles in the potting compound or damaged parts in the stator windings, applying high voltage to the motor in a semi-vacuum state can easily cause corona collisions, which can easily lead to electric sparks flying inside the motor and thus cause breakdown. At this time, workers need to turn on the vacuum pump 3 to put the motor body 2 in a semi-vacuum state and start the withstand voltage tester 22 to apply high voltage to the motor, thus creating a good testing environment. At this time, if the motor does not break down, the potting compound and the stator windings are in a normal state, and there are no air bubbles in the potting compound. If electric sparks fly inside the motor and drift around in the vacuum, accompanied by breakdown, there are air bubbles in the potting compound or the stator windings are damaged.

[0051] Previously, without this testing method, breakdown was prone to occur whenever workers continuously performed motor production operations (i.e., applying internal pressure to the motor while it was in a semi-vacuum state), and workers could not determine the cause of this phenomenon. By investigating the cause, workers can accurately detect whether there are air bubbles in the potting compound, thereby improving the user experience.

[0052] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A vacuum pump professional water-cooled variable frequency motor vacuum internal pressure test system, comprising a workbench (1), characterized in that: The upper surface of the workbench (1) is provided with a mounting groove (11), and the motor body (2) is arranged in the mounting groove (11); the side wall of the motor body (2) is provided with a junction box (21); the upper surface of the workbench (1) is provided with a high-voltage instrument (22) for injecting high pressure into the motor body (2); the upper surface of the workbench (1) is provided with a vacuum pump (3); the upper surface of the workbench (1) is provided with a power supply (31) electrically connected with the vacuum pump (3) and the high-voltage instrument (22). A limiting groove (32) is formed in the side wall of the mounting groove (11); the workbench (1) is provided with a fixing mechanism (4) for fixing the motor body (2); the fixing mechanism (4) comprises a limiting assembly (5) arranged on the workbench (1) for limiting the motor body (2) and a switch assembly (6) arranged on the workbench (1) for controlling the opening and closing of the limiting assembly (5); when the motor is detected, the motor body is made vertical and connected with the high-voltage instrument. The limiting assembly (5) comprises a mounting plate (51) fixed on the bottom surface of the motor body (2), a limiting rod (52) slidingly arranged in the limiting groove (32), and a limiting spring (53) having one end fixed on the side wall of the limiting rod (52) away from the motor body (2) and the other end fixed on the inner wall of the limiting groove (32) away from the motor body (2); a limiting hole (54) matching with the limiting rod (52) is formed in the side wall of the mounting plate (51) close to the limiting groove (32).

2. The vacuum pump professional water-cooled variable frequency motor vacuum internal pressure test system according to claim 1, characterized in that: A first inclined surface (7) is formed in the edge of the upper surface of the limiting rod (52) intersecting with the side wall close to the mounting plate (51).

3. The vacuum pump professional water-cooled variable frequency motor vacuum internal pressure test system according to claim 2, characterized in that: A sliding groove (55) is formed in each of the four inner walls of the mounting groove (11); the switch assembly (6) comprises a sliding block (61) slidingly arranged in the sliding groove (55) and a mounting ring (62) mounted on the side walls of the four sliding blocks (61) close to each other.

4. The vacuum pump professional water-cooled variable frequency motor vacuum internal pressure test system according to claim 3, characterized in that: A switch spring (8) is fixed on the bottom surface of the sliding block (61) and the other end of the switch spring (8) is fixed on the inner bottom wall of the sliding groove (55).

5. The vacuum pump professional water-cooled variable frequency motor vacuum internal pressure test system according to claim 4, characterized in that: A second inclined surface (82) is formed in the edge of the bottom surface of the abutting block (81) intersecting with the side wall away from the motor body (2).

6. The vacuum pump professional water-cooled variable frequency motor vacuum internal pressure test system according to claim 3, characterized in that: A rubber sheet (83) is arranged on the outer wall of the mounting ring (62).

7. The vacuum pump professional water-cooled variable frequency motor vacuum internal pressure test system according to claim 6, characterized in that: An installation block (9) is arranged on the side wall of the mounting ring (62) for reducing the difficulty of sliding the mounting ring (62) by the worker.

8. The vacuum pump professional water-cooled variable frequency motor vacuum internal pressure test system according to claim 7, characterized in that: A round corner is arranged on the inner wall of the mounting ring (62).

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