Motor coil immersion resistance experiment device

Abstract

The utility model discloses a motor coil immersion resistance experiment device, which comprises an insulation resistance tester and an immersion resistance experiment mechanism, the positive and negative electrodes of the insulation resistance tester are electrically connected with the positive and negative electrodes of the immersion resistance experiment mechanism respectively, and the immersion resistance experiment mechanism comprises an insulation container, a lifting assembly and a pushing assembly. The lifting assembly and the pushing assembly are installed on the two inner sides of the insulation container respectively, the pushing assembly presses a motor coil to the movable end of the lifting assembly, the positive electrode and the negative electrode of the motor coil are electrically connected with the positive electrode and the negative electrode of the immersion resistance experiment mechanism respectively, and the motor coil, the insulation resistance tester and the immersion resistance experiment mechanism form a closed-loop conductive path. The insulation container is filled with a liquid conducting medium, and the negative electrode of the insulation resistance tester is located in the liquid conducting medium. The device utilizes the working principle that the liquid conducting medium in the insulation container conducts the motor coil to influence the numerical value of the insulation resistance tester to know the damage position of the coil, and the operation is simple and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of resistance experimental devices, in particular to a water-immersed resistance experimental device for a motor coil. Background Art

[0002] After the motor winding is connected, check whether the three-phase winding is connected in reverse or incorrectly. Use a multimeter to measure the conductivity of the coil. If it is connected, it means that the coil is connected correctly. Otherwise, it means that it is connected incorrectly. Check and eliminate the fault. If the wiring is correct, the newly wound motor must also be tested for insulation between the winding and the casing and between the windings. A megohmmeter should be used for the immersion test measurement, and its immersion resistance value is generally not less than 11 megohms.

[0003] In actual insulation testing, the use of megohmmeters has been replaced by water-immersion resistance test devices. In the prior art, the Chinese utility model patent with application number CN200920049502.8 and name of membrane-wrapped flat wire water-immersion insulation resistance test device has the following technical solution: place the wire in a liquid conductive medium, and use an insulation resistance tester to electrically connect the two ends of the wire. When the insulation layer of the wire is damaged, the insulation resistance tester is connected through the water body to detect the insulation of the wire. However, the above device has limitations in use and is only suitable for insulation detection of a single wire. For a group of motor coils, it is difficult to know where the insulation of the motor coil is broken when it is directly placed in water, which is not conducive to insulation detection of the motor coil. Utility Model Content

[0004] The utility model aims to provide a motor coil water immersion resistance test device to solve the problem that the existing water immersion resistance test device is only suitable for insulation detection of a single line, has limitations, and is not conducive to insulation detection of the motor coil.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A motor coil water immersion resistance test device comprises an insulation resistance tester and a water immersion resistance test mechanism, wherein the positive and negative electrodes of the insulation resistance tester are electrically connected to the positive and negative electrodes of the water immersion resistance test mechanism respectively, and the water immersion resistance test mechanism comprises an insulating container, a lifting assembly and a pushing assembly, wherein the lifting assembly and the pushing assembly are respectively mounted on the two inner sides of the insulating container, and the pushing assembly presses the motor coil onto the movable end of the lifting assembly, wherein the positive and negative electrodes of the motor coil are electrically connected to the positive and negative electrodes of the water immersion resistance test mechanism respectively, and the motor coil, the insulation resistance tester and the water immersion resistance test mechanism form a closed-loop conductive path, wherein the insulating container is filled with a liquid conductive medium, and the negative electrode of the insulation resistance tester is located in the liquid conductive medium.

[0007] A further technical solution is: the lifting assembly includes a left side plate, a left slider, a screw, a cross plate and a motor, the left side plate and the cross plate are both installed on the insulating container, the left slider is slidably installed in the first slide groove of the left side plate, the motor is installed on the cross plate, one end of the screw is connected to the output end of the motor, and the screw is threadedly connected to the left slider.

[0008] A further technical solution is: a load-bearing column for the motor coil is arranged on the outer side surface of the left sliding block.

[0009] A further technical solution is: the pushing assembly includes a right side plate, a right slider, a first spring, a telescopic seat and a plunger head, the right side plate is installed on the insulating container, the right slider is slidably installed in the second slide groove of the right side plate, the first spring is located in the second slide groove, and the first spring is pressed against the bottom surface of the right slider, the telescopic seat is installed on the outer side of the right slider, and the plunger head is installed on the outer side of the telescopic seat.

[0010] A further technical solution is: the telescopic seat includes an inner rod, an outer rod and a second spring, the inner rod is installed on the outer side of the right slider, the outer rod is slidably installed on the inner rod, and the second spring is located between the inner rod and the outer rod.

[0011] A further technical solution is: a tooth groove is arranged on the inner rod, a tooth plate matching the tooth groove is slidably mounted on the side surface of the outer rod, and the tooth plate is locked by bolts.

[0012] A further technical solution is that a wire clamp is provided on the insulating container.

[0013] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0014] The utility model provides a motor coil immersion resistance test device, which fixes the motor coil to be tested for resistance by means of a lifting device and a pushing assembly, and uses the working principle that a liquid conductive medium in an insulating container conducts the motor coil to affect the value of an insulation resistance tester, so that it can be known that insulation damage occurs at a coil portion near the liquid surface of the liquid conductive medium, and the device is convenient for positioning, simple and convenient to operate, and efficient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic structural diagram of a motor coil water immersion resistance experimental device.

[0016] Figure 2 For this utility model Figure 1 Schematic diagram of the structure of the lifting component.

[0017] Figure 3 For this utility model Figure 2 Schematic diagram of the structure of the middle screw.

[0018] Figure 4 For this utility model Figure 1 Schematic diagram of the structure of the push-tightening component.

[0019] Figure 5 For this utility model Figure 4 Schematic diagram of the structure of the first spring.

[0020] Figure 6 For this utility model Figure 1 Schematic diagram of the structure from a side view.

[0021] Figure numerals: 1. Insulation resistance tester; 2. Insulation container; 3. Lifting assembly; 4. Pushing assembly; 5. Motor coil; 6. Left side plate; 7. Left slider; 8. Screw; 9. Cross plate; 10. Motor; 11. Load-bearing column; 12. Right side plate; 13. Right slider; 14. First spring; 15. Telescopic seat; 16. Plunger head; 17. Inner rod; 18. Outer rod; 19. Second spring; 20. Tooth groove; 21. Tooth plate; 22. Wire clamp. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Embodiment 1:

[0029] In this embodiment, Figure 1 As shown, a motor coil water immersion resistance test device includes an insulation resistance tester 1 and a water immersion resistance test mechanism, the positive and negative electrodes of the insulation resistance tester 1 are electrically connected to the positive and negative electrodes of the water immersion resistance test mechanism respectively, the water immersion resistance test mechanism includes an insulating container 2, a lifting component 3 and a pushing component 4, the lifting component 3 and the pushing component 4 are respectively installed on the two inner sides of the insulating container 2, the pushing component 4 presses the motor coil 5 on the movable end of the lifting component 3, the positive and negative electrodes of the motor coil 5 are electrically connected to the positive and negative electrodes of the water immersion resistance test mechanism respectively, and the motor coil 5, the insulation resistance tester 1 and the water immersion resistance test mechanism form a closed-loop conductive path, the insulating container 2 is filled with a liquid conductive medium, and the negative electrode of the insulation resistance tester 1 is located in the liquid conductive medium.

[0030] The movable end of the lifting component 3 is used to install the motor coil 5, and the pushing component 4 presses the motor coil 5 onto the movable end of the lifting component 3. The lifting component gradually immerses the motor coil 5 in the liquid conductive medium. When the insulation damage of the motor coil 5 is below the liquid surface, the liquid conductive medium and the insulation resistance tester 1 also form a passage, which affects the change of the numbers of the insulation resistance tester 1. At this time, the coil damage near the liquid surface can be located, which is convenient for maintenance.

[0031] Embodiment 2:

[0032] Based on the above embodiments, this embodiment Figure 2 and Figure 3 As shown, the lifting assembly 3 includes a left side plate 6, a left slider 7, a screw 8, a cross plate 9 and a motor 10. The left side plate 6 and the cross plate 9 are both installed on the insulating container 2. The left slider 7 is slidably installed in the first slide groove of the left side plate 6. The motor 10 is installed on the cross plate 9. One end of the screw 8 is connected to the output end of the motor 10, and the screw 8 is threadedly connected to the left slider 7.

[0033] When the motor 10 drives the screw rod 8 to rotate, the left slider 7 is moved up and down in the vertical direction in the first slide groove, that is, the motor coil 5 is gradually immersed in the liquid conductive medium.

[0034] Preferably, a load-bearing column 11 for the motor coil 5 is provided on the outer side surface of the left sliding block 7 .

[0035] The load-bearing column 11 is used to install the motor coil 5 .

[0036] Embodiment three:

[0037] Based on the above embodiments, this embodiment Figure 4 and Figure 5 As shown, the pushing assembly 4 includes a right side plate 12, a right slider 13, a first spring 14, a telescopic seat 15 and a plunger head 16. The right side plate 12 is installed on the insulating container 2, the right slider 13 is slidably installed in the second slide groove of the right side plate 12, the first spring 14 is located in the second slide groove, and the first spring 14 is pressed against the bottom surface of the right slider 13, the telescopic seat 15 is installed on the outer side of the right slider 13, and the plunger head 16 is installed on the outer side of the telescopic seat 15.

[0038] The plunger head 16 on the telescopic seat 15 will press against one end of the motor coil 5 to prevent the motor coil 5 from shaking or rotating on the lifting assembly 3, thereby affecting the accuracy of the experiment.

[0039] The first spring 14 can help the right slider 13 to return to its original position, making it easier to install the motor coil 5 next time.

[0040] Preferably, the telescopic seat 15 includes an inner rod 17 , an outer rod 18 and a second spring 19 , the inner rod 17 is mounted on the outer side of the right slider 13 , the outer rod 18 is slidably mounted on the inner rod 17 , and the second spring 19 is located between the inner rod 17 and the outer rod 18 .

[0041] The second spring 19 can press the plunger head 16 against the motor coil 5 via the outer rod 18 .

[0042] Preferably, a tooth groove 20 is provided on the inner rod 17, and a tooth plate 21 adapted to the tooth groove 20 is slidably mounted on the side surface of the outer rod 18, and the tooth plate 21 is locked by bolts.

[0043] The tooth groove 20 is matched with the tooth plate 21 to lock the recovered outer rod 18 to facilitate the installation of the motor coil 5.

[0044] Preferably, a wire clamp 22 is provided on the insulating container 2 .

[0045] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A motor coil immersion resistance test device, characterized in that: The invention comprises an insulation resistance tester (1) and a water immersion resistance test mechanism, wherein the positive and negative electrodes of the insulation resistance tester (1) are respectively electrically connected to the positive and negative electrodes of the water immersion resistance test mechanism, and the water immersion resistance test mechanism comprises an insulation container (2), a lifting component (3) and a pressing component (4), wherein the lifting component (3) and the pressing component (4) are respectively mounted on two inner sides of the insulation container (2), and the pressing component (4) presses a motor coil (5) onto the movable end of the lifting component (3), wherein the positive and negative electrodes of the motor coil (5) are respectively electrically connected to the positive and negative electrodes of the water immersion resistance test mechanism, and the motor coil (5), the insulation resistance tester (1) and the water immersion resistance test mechanism form a closed-loop conductive path, and the insulation container (2) is filled with a liquid conductive medium, and the negative electrode of the insulation resistance tester (1) is located in the liquid conductive medium.

2. The motor coil water immersion resistance test device according to claim 1 is characterized by: The lifting assembly (3) comprises a left side plate (6), a left slider (7), a screw rod (8), a transverse plate (9) and a motor (10); the left side plate (6) and the transverse plate (9) are both mounted on the insulating container (2); the left slider (7) is slidably mounted in a first slide groove of the left side plate (6); the motor (10) is mounted on the transverse plate (9); one end of the screw rod (8) is connected to an output end of the motor (10), and the screw rod (8) is threadedly connected to the left slider (7).

3. The motor coil water immersion resistance test device according to claim 2 is characterized in that: A load-bearing column (11) for the motor coil (5) is provided on the outer side surface of the left sliding block (7).

4. The motor coil water immersion resistance test device according to claim 1 is characterized in that: The pushing assembly (4) comprises a right side plate (12), a right slider (13), a first spring (14), a telescopic seat (15) and a plunger head (16); the right side plate (12) is mounted on the insulating container (2); the right slider (13) is slidably mounted in a second slide groove of the right side plate (12); the first spring (14) is located in the second slide groove, and the first spring (14) is pressed against the bottom surface of the right slider (13); the telescopic seat (15) is mounted on the outer side surface of the right slider (13); and the plunger head (16) is mounted on the outer side surface of the telescopic seat (15).

5. The motor coil water immersion resistance test device according to claim 4 is characterized in that: The telescopic seat (15) comprises an inner rod (17), an outer rod (18) and a second spring (19); the inner rod (17) is mounted on the outer side of the right slider (13); the outer rod (18) is slidably mounted on the inner rod (17); and the second spring (19) is located between the inner rod (17) and the outer rod (18).

6. The motor coil water immersion resistance test device according to claim 5, characterized in that: The inner rod (17) is provided with a tooth groove (20), and a tooth plate (21) adapted to the tooth groove (20) is slidably mounted on the side surface of the outer rod (18), and the tooth plate (21) is locked by bolts.

7. The motor coil water immersion resistance test device according to claim 1, characterized in that: The insulating container (2) is provided with a wire clamp (22).

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