Motor stator coil potting process

Abstract

The invention relates to the technical field of motor stator coil potting, and discloses a motor stator coil potting process, which comprises the following steps: S1, blending potting glue; s2, potting: pouring the prepared potting adhesive into a charging barrel of potting equipment, accurately placing the stator coil in a potting mold, starting the potting equipment, slowly injecting the potting adhesive into a gap between the stator coil and the mold, and carrying out bubble removal treatment; s3, curing treatment: curing the stator coil by using ultraviolet irradiation equipment in an ultraviolet curing pouring sealant mode; s4, demolding treatment: after the pouring sealant is completely cured, a demolding agent is used for assisting demolding, and the stator coil is taken out of the mold; s5, model cleaning; and S6, model detection. In the working process, bubbles in the potting glue are removed through bubble removal treatment, bubbles are prevented from being formed on the stator coil after potting, the insulativity and the heat dissipation performance of the stator coil are guaranteed, and the use of the stator coil is optimized.

Description

Technical Field

[0001] The invention belongs to the technical field of motor stator coil potting, in particular to a motor stator coil potting process. Background Art

[0002] The motor stator is the fixed part of the motor, while the stator coil is the conductive winding wound on the stator core; the stator coil is usually made of insulated wire (such as copper wire). When current passes through the stator coil, a magnetic field is generated. This magnetic field interacts with the magnetic field in the motor rotor, causing the motor rotor to rotate and realize the conversion of electrical energy into mechanical energy.

[0003] When assembling the stator coil of a motor, it is often necessary to perform potting glue treatment to enhance the insulation performance. The potting glue can fill the gap between the stator coil and the iron core, provide good insulation protection, and prevent short circuits between coils or between the coil and the iron core. However, when potting the existing stator coil, bubbles are often generated, causing bubbles to form on the stator coil after potting, resulting in poor insulation and heat dissipation of the stator coil, affecting the use of the stator coil. Summary of the invention

[0004] To achieve the above object, the present invention provides the following technical solution: a motor stator coil potting process, comprising the following steps:

[0005] S1. Prepare potting glue: add the specified glue into the container according to the proportion, and then stir it thoroughly with a stirring device;

[0006] S2. Potting: Pour the prepared potting glue into the barrel of the potting equipment, and accurately place the stator coil in the potting mold. Start the potting equipment, slowly inject the potting glue into the gap between the stator coil and the mold, and remove bubbles.

[0007] S3, curing treatment: using ultraviolet curing potting glue, using ultraviolet irradiation equipment to cure the stator coil;

[0008] S4, demoulding process: when the potting glue is completely cured, use a demoulding agent to assist demoulding and take the stator coil out of the mold;

[0009] S5. Model cleaning: Use a cleaning agent to clean the residual potting glue and impurities on the surface of the stator coil, and then wipe it dry with a clean cloth;

[0010] S6. Model testing: Inspect the stator coil after potting to check whether the potting quality meets the requirements.

[0011] Preferably, the stirring device used in S1 should be strictly controlled to stir slowly to avoid air from mixing into the potting glue, and at the same time, the stirring device should be controlled to stir in one direction to ensure that the various glues are mixed evenly and avoid air from being drawn in.

[0012] Preferably, the degassing process in S2 comprises the following steps:

[0013] S2-1, vibration treatment: Place the potting mold on a vibration table and vibrate it at an appropriate frequency and amplitude to cause bubbles to float up and be removed;

[0014] S2-2, installation: placing the potting mold on the rotating device and fixing it, then placing the rotating device in the sealed container and fixing the sealed container;

[0015] S2-3, Rotation treatment: Start the rotating device and control the rotation speed of the rotating device to be slow, thereby driving the potting mold to rotate slowly in the vertical direction, so that the bubbles are separated from the mold under the action of gravity. The slow rotation is to ensure that every part of the stator coil is subjected to the same gravity;

[0016] S2-4, Vacuum treatment: The vacuum degassing equipment is used on the sealed container, the mold is placed in a vacuum box, and vacuum is drawn for a period of time at a certain vacuum degree, so that the residual bubbles can expand and burst and be discharged under the negative pressure environment.

[0017] Preferably, the time and intensity of the vibration in S2-1 need to be adjusted according to the characteristics of the potting compound to avoid stratification of the potting compound due to excessive vibration, and measures are taken to regularly observe the specific conditions of the potting compound during the vibration process.

[0018] Preferably, the vacuum degree and vacuuming time in S2-4 need to be adjusted according to the properties of the potting glue and the bubble situation. Usually, the vacuum degree can be set between 0.05MPa and 0.7MPa, and the vacuuming time is 35 minutes to 50 minutes.

[0019] Preferably, when potting glue in S2, the flow rate and pressure of the potting glue need to be controlled to ensure that the potting glue can fully fill the gaps in the stator coils. Usually, a step-by-step addition method is adopted to gradually inject the potting glue to reduce the generation of bubbles.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. During work, the bubbles in the potting glue are removed through debubbling treatment, which avoids the formation of bubbles on the stator coil after potting, ensures the insulation and heat dissipation of the stator coil, and optimizes the use of the stator coil.

[0022] 2. During operation, the mold is rotated during the bubble removal process so that the bubbles are separated from the mold under the action of gravity. The slow rotation is to ensure that each part of the stator coil is subjected to the same gravity to ensure the normal use of the stator coil after molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 It is a schematic diagram of the process flow of the present invention. DETAILED DESCRIPTION

[0025] The technical solutions 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 only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] Embodiment 1, by Figure 1 The present invention includes a motor stator coil potting process, comprising the following steps:

[0027] S1. Prepare potting glue: add the specified glue into the container according to the proportion, and then use a stirring device to stir thoroughly. The stirring device used should be strictly controlled to stir slowly to avoid air mixing into the potting glue. At the same time, the stirring device should be controlled to stir in one direction to ensure that the glues are mixed evenly and avoid air being drawn in.

[0028] S2. Potting: Pour the prepared potting glue into the barrel of the potting equipment, and accurately place the stator coil in the potting mold. Start the potting equipment, slowly inject the potting glue into the gap between the stator coil and the mold, and remove bubbles.

[0029] The debubbling process in S2 includes the following steps:

[0030] S2-1, vibration treatment: Place the potting mold on a vibration table and vibrate it at an appropriate frequency and amplitude to cause bubbles to float up and be removed;

[0031] The vibration time and intensity in S2-1 need to be adjusted according to the characteristics of the potting compound to avoid excessive vibration leading to potting compound delamination, and measures should be taken to regularly observe the specific conditions of the potting compound during the vibration process;

[0032] S2-2, installation: placing the potting mold on the rotating device and fixing it, then placing the rotating device in the sealed container and fixing the sealed container;

[0033] S2-3, Rotation treatment: Start the rotating device and control the rotation speed of the rotating device to be slow, thereby driving the potting mold to rotate slowly in the vertical direction, so that the bubbles are separated from the mold under the action of gravity. The slow rotation is to ensure that every part of the stator coil is subjected to the same gravity;

[0034] S2-4, vacuum treatment: The vacuum degassing equipment acts on the sealed container, the mold is placed in a vacuum box, and vacuum is drawn for a period of time at a certain vacuum degree, so that the residual bubbles expand and burst under negative pressure environment and are discharged;

[0035] The vacuum degree and vacuuming time in S2-4 need to be adjusted according to the properties of the potting compound and the bubble situation. Usually the vacuum degree can be set at 0.05MPa and the vacuuming time is 35 minutes.

[0036] When pouring glue, it is necessary to control the flow and pressure of the potting glue to ensure that the potting glue can fully fill the gap of the stator coil. Usually, the potting glue is gradually injected in a step-by-step manner to reduce the generation of bubbles.

[0037] S3, curing treatment: using ultraviolet curing potting glue, using ultraviolet irradiation equipment to cure the stator coil;

[0038] S4, demoulding process: when the potting glue is completely cured, use a demoulding agent to assist demoulding and take the stator coil out of the mold;

[0039] S5. Model cleaning: Use a cleaning agent to clean the residual potting glue and impurities on the surface of the stator coil, and then wipe it dry with a clean cloth;

[0040] S6. Model testing: Inspect the stator coil after potting to check whether the potting quality meets the requirements.

[0041] Embodiment 2, by Figure 1 It is given that the debubbling process in S2 includes the following steps:

[0042] S2-1, vibration treatment: Place the potting mold on a vibration table and vibrate it at an appropriate frequency and amplitude to cause bubbles to float up and be removed;

[0043] The vibration time and intensity in S2-1 need to be adjusted according to the characteristics of the potting compound to avoid excessive vibration leading to potting compound delamination, and measures should be taken to regularly observe the specific conditions of the potting compound during the vibration process;

[0044] S2-2, installation: placing the potting mold on the rotating device and fixing it, then placing the rotating device in the sealed container and fixing the sealed container;

[0045] S2-3, Rotation treatment: Start the rotating device and control the rotation speed of the rotating device to be slow, thereby driving the potting mold to rotate slowly in the vertical direction, so that the bubbles are separated from the mold under the action of gravity. The slow rotation is to ensure that every part of the stator coil is subjected to the same gravity;

[0046] S2-4, vacuum treatment: The vacuum degassing equipment acts on the sealed container, the mold is placed in a vacuum box, and vacuum is drawn for a period of time at a certain vacuum degree, so that the residual bubbles expand and burst under negative pressure environment and are discharged;

[0047] The vacuum degree and vacuuming time in S2-4 need to be adjusted according to the properties of the potting compound and the bubble situation. Usually the vacuum degree can be set at 0.7MPa and the vacuuming time is 50 minutes.

[0048] When pouring glue, it is necessary to control the flow and pressure of the potting glue to ensure that the potting glue can fully fill the gap of the stator coil. Usually, a step-by-step addition method is adopted to gradually inject the potting glue to reduce the generation of bubbles.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A motor stator coil potting process, characterized in that: The following steps are involved: S1. Prepare potting glue: add the specified glue into the container according to the proportion, and then stir it thoroughly with a stirring device; S2. Potting: Pour the prepared potting glue into the barrel of the potting equipment, and accurately place the stator coil in the potting mold. Start the potting equipment, slowly inject the potting glue into the gap between the stator coil and the mold, and remove bubbles. S3, curing treatment: using ultraviolet curing potting glue, using ultraviolet irradiation equipment to cure the stator coil; S4, demoulding process: when the potting glue is completely cured, use a demoulding agent to assist demoulding and take the stator coil out of the mold; S5. Model cleaning: Use a cleaning agent to clean the residual potting glue and impurities on the surface of the stator coil, and then wipe it dry with a clean cloth; S6. Model testing: Inspect the stator coil after potting to check whether the potting quality meets the requirements.

2. The process for encapsulating a motor stator coil according to claim 1, characterized in that: The stirring device used in S1 should be strictly controlled to stir slowly to avoid air from being mixed into the potting glue. At the same time, the stirring device should be controlled to stir in one direction to ensure that the various glues are mixed evenly and avoid air from being drawn in.

3. The process for encapsulating a motor stator coil according to claim 1, characterized in that: The degassing process in S2 comprises the following steps: S2-1, vibration treatment: Place the potting mold on a vibration table and vibrate it at an appropriate frequency and amplitude to cause bubbles to float up and be removed; S2-2, installation: placing the potting mold on the rotating device and fixing it, then placing the rotating device in the sealed container and fixing the sealed container; S2-3, Rotation treatment: Start the rotating device and control the rotation speed of the rotating device to be slow, thereby driving the potting mold to rotate slowly in the vertical direction, so that the bubbles are separated from the mold under the action of gravity. The slow rotation is to ensure that every part of the stator coil is subjected to the same gravity; S2-4, Vacuum treatment: The vacuum degassing equipment is used on the sealed container, the mold is placed in a vacuum box, and vacuum is drawn for a period of time at a certain vacuum degree, so that the residual bubbles can expand and burst and be discharged under the negative pressure environment.

4. The process for encapsulating a motor stator coil according to claim 1, characterized in that: The time and intensity of the vibration in S2-1 need to be adjusted according to the characteristics of the potting compound to avoid excessive vibration leading to stratification of the potting compound, and measures should be taken to regularly observe the specific conditions of the potting compound during the vibration process.

5. The process for encapsulating a motor stator coil according to claim 1, characterized in that: The vacuum degree and vacuuming time in S2-4 need to be adjusted according to the properties of the potting glue and the bubble situation. Usually, the vacuum degree can be set between 0.05MPa and 0.7MPa, and the vacuuming time is 35 minutes to 50 minutes.

6. The process for encapsulating a motor stator coil according to claim 1, characterized in that: When the potting glue is poured in S2, the flow rate and pressure of the potting glue need to be controlled to ensure that the potting glue can fully fill the gaps in the stator coils. Usually, a step-by-step addition method is adopted to gradually inject the potting glue to reduce the generation of bubbles.

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