Sensor winding penetration method and sensor

Abstract

The invention provides a sensor winding soaking method and a sensor, and the sensor winding soaking method comprises the steps: after a primary coil of the sensor is wound and before a secondary coil of the sensor is not wound, immersing the primary coil of the sensor in insulating varnish, and enabling the insulating varnish to soak the primary coil of the sensor; performing vacuum operation on a primary coil of the sensor to enable the primary coil to be in a vacuum state; curing the insulating varnish on the primary coil; the insulating varnish on the primary coil is solidified, and after the secondary coil of the sensor is wound, the secondary coil of the sensor is immersed in the insulating varnish, so that the primary coil of the sensor is immersed in the insulating varnish; performing vacuum operation on a secondary coil of the sensor to enable the secondary coil to be in a vacuum state; and curing the insulating varnish on the secondary coil. The impregnation rate of the sensor winding can be improved.

Description

Technical Field

[0001] The present application relates to a field, and in particular, to a sensor winding impregnation method and a sensor. Background Art

[0002] One of the main core components of aviation sensors is the winding, which consists of a skeleton, insulating tape, a primary coil and a secondary coil. The primary coil and the secondary coil are made of enameled wire wound on the skeleton.

[0003] Furthermore, the protection of the winding is crucial to the performance and life of the sensor, and impregnating the winding with insulating varnish is an important means of protecting the winding. Insulating varnish is a coating with excellent electrical insulation properties, which can protect the winding.

[0004] At present, because the primary coil and the secondary coil of the sensor winding are tightly wound, the primary coil and the secondary coil have many layers, and the insulating tape is pasted between the primary coil and the secondary coil and outside the primary coil, the insulating paint cannot fully penetrate the winding, that is, the impregnation rate of the insulating paint is low. Furthermore, the low impregnation rate of the insulating paint will reduce the protective effect of the insulating paint on the winding. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide a sensor winding impregnation method and a sensor, so as to improve the impregnation rate of the sensor winding.

[0006] In a first aspect, the present invention provides a sensor winding impregnation method, the method comprising:

[0007] After the primary coil of the sensor is wound and before the secondary coil of the sensor is wound, immersing the primary coil of the sensor in insulating varnish so that the insulating varnish impregnates the primary coil of the sensor;

[0008] Performing a vacuum operation on the primary coil of the sensor to place the primary coil in a vacuum state;

[0009] curing the insulating varnish on the primary coil;

[0010] After the insulating varnish on the primary coil is cured and the secondary coil of the sensor is wound, the secondary coil of the sensor is immersed in the insulating varnish so that the insulating varnish impregnates the primary coil of the sensor;

[0011] Performing a vacuum operation on the secondary coil of the sensor to place the secondary coil in a vacuum state;

[0012] The insulating varnish on the secondary coil is cured.

[0013] The present application can immerse the primary coil of the sensor in insulating varnish after the primary coil of the sensor is wound but before the secondary coil of the sensor is wound, and the insulating varnish is solidified on the primary coil. After the secondary coil of the sensor is wound, the secondary coil of the sensor is immersed in the insulating varnish again, so that the insulating varnish impregnates the secondary coil of the sensor and solidifies. In this way, the insulating varnish is segmentedly impregnated into the primary coil and the secondary coil of the sensor, so that the insulating varnish can be more fully immersed in the interior of the coil of the sensor, thereby improving the impregnation rate of the insulating varnish into the sensor winding. On the other hand, the present application adopts vacuum operation in the process of immersing the insulating varnish into the primary coil of the sensor and in the process of immersing the insulating varnish into the secondary coil of the sensor, so that the immersion of the insulating varnish is carried out under vacuum conditions, wherein the vacuum operation can effectively remove air and moisture, avoid the generation of bubbles and surface defects, and thereby avoid bubbles and surface defects from reducing the impregnation rate of the insulating varnish; at the same time, the vacuum operation can put the sensor in a vacuum state, so that the insulating varnish can be more fully absorbed into the interior of the sensor coil under the action of external pressure to fill the pores and capillaries therein, thereby further improving the impregnation rate of the insulating varnish into the sensor winding.

[0014] In an optional embodiment, the vacuum operation of the primary coil includes multiple vacuuming and depressurization, wherein each vacuuming is followed by one depressurization.

[0015] This optional implementation can achieve repeated vacuum operation by performing vacuuming and depressurizing multiple times, wherein the repeated vacuum operation can further remove air and moisture from the primary coil of the sensor, thereby improving the vacuum effect of the primary coil of the sensor.

[0016] In an optional embodiment, the vacuum operation of the secondary coil includes multiple vacuuming and pressure relief, wherein each vacuuming is followed by one pressure relief.

[0017] This optional implementation can achieve repeated vacuum operation by performing vacuuming and depressurizing multiple times, wherein the repeated vacuum operation can further remove air and moisture from the secondary coil of the sensor, thereby improving the vacuum effect of the secondary coil of the sensor.

[0018] In an optional embodiment, the vacuum pressure used in the vacuum operation is -0.05 MPA to -0.1 MPA, and the duration of the vacuum operation is 0.6 to 1 hour.

[0019] This optional implementation adopts a vacuum pressure of -0.05MPA to -0.1MPA and a duration of 0.6 to 1H, which can more fully remove the air and moisture in the sensor coil.

[0020] In an optional embodiment, the curing temperature is 200°C.

[0021] This optional implementation method can solidify the insulating varnish by using the curing temperature parameter of 200° C., while avoiding the insulating varnish being damaged due to excessively high temperature.

[0022] In an optional embodiment, the curing time is 2 to 2.5 hours.

[0023] This optional implementation method can completely cure the insulating varnish through the parameter of curing time 2 to 2.5 hours.

[0024] In an optional embodiment, before immersing the primary coil of the sensor in the insulating varnish, the method further comprises:

[0025] The insulating varnish is mixed with a thinner.

[0026] This optional implementation manner can prevent the insulating varnish from being too thick by mixing the insulating varnish with a diluent, thereby preventing the insulating varnish from being too thick and causing a low impregnation rate of the insulating varnish.

[0027] In an optional implementation, the mixing ratio of the insulating varnish to the diluent is 8:2 to 6:4.

[0028] This optional implementation scheme sets the mixing ratio of the insulating varnish to the diluent to 8:2 to 6:4. On the one hand, it can prevent the insulating varnish from being too thick, and on the other hand, it can avoid excessive diluent, thereby preventing the coating from being too thin due to excessive diluent, affecting the protective effect of the insulating varnish on the sensor winding.

[0029] In an optional embodiment, before mixing the insulating varnish with the diluent to obtain the insulating varnish, the method further comprises:

[0030] The primary coil of the sensor is pre-baked.

[0031] This optional implementation manner can remove part of the moisture inside the primary coil by pre-baking the primary coil of the sensor.

[0032] In a second aspect, the present invention provides a sensor, wherein the sensor is obtained based on the method described in any one of the aforementioned embodiments.

[0033] The sensor of the second aspect of the present application is prepared based on the method of the first aspect, and thus has the advantages of better insulation performance and better mechanical strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 It is a schematic flow chart of a sensor winding impregnation method disclosed in an embodiment of the present application;

[0036] Figure 2 is a schematic diagram of the structure of a sensor winding disclosed in an embodiment of the present application;

[0037] Figure 3 It is a flow chart of another sensor winding penetration method disclosed in an embodiment of the present application.

[0038] Icon: 1- first insulating tape; 2- second insulating tape; 3- third insulating tape; 4- skeleton; 5- primary coil of sensor; 6- secondary coil of sensor. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0040] See also Figure 1 , Figure 1 Schematic diagram of a flow chart of a sensor winding impregnation method disclosed in an embodiment of the present application. Figure 1 As shown, the sensor winding penetration method of the embodiment of the present application includes the following steps:

[0041] 101. After the primary coil of the sensor is wound, but before the secondary coil of the sensor is wound, immerse the primary coil of the sensor in insulating varnish, so that the insulating varnish impregnates the primary coil of the sensor;

[0042] 102. Perform vacuum operation on the primary coil of the sensor to put the primary coil in a vacuum state;

[0043] 103. Curing the insulating varnish on the primary coil;

[0044] 104. After the insulating varnish on the primary coil is cured and the secondary coil of the sensor is wound, the secondary coil of the sensor is immersed in the insulating varnish so that the insulating varnish impregnates the secondary coil of the sensor;

[0045] 105. Perform vacuum operation on the secondary coil of the sensor to make the secondary coil in a vacuum state;

[0046] 106. Cure the insulating varnish on the secondary coil.

[0047] The present application can immerse the primary coil of the sensor in insulating varnish after the primary coil of the sensor is wound but before the secondary coil of the sensor is wound, and the insulating varnish is solidified on the primary coil. After the secondary coil of the sensor is wound, the secondary coil of the sensor is immersed in the insulating varnish again, so that the insulating varnish impregnates the secondary coil of the sensor and solidifies. In this way, the insulating varnish is segmentedly impregnated into the primary coil and the secondary coil of the sensor, so that the insulating varnish can be more fully immersed in the interior of the coil of the sensor, thereby improving the impregnation rate of the insulating varnish into the sensor winding. On the other hand, the present application adopts vacuum operation in the process of immersing the insulating varnish into the primary coil of the sensor and in the process of immersing the insulating varnish into the secondary coil of the sensor, so that the immersion of the insulating varnish is carried out under vacuum conditions, wherein the vacuum operation can effectively remove air and moisture, avoid the generation of bubbles and surface defects, and thereby avoid bubbles and surface defects from reducing the impregnation rate of the insulating varnish; at the same time, the vacuum operation can put the sensor in a vacuum state, so that the insulating varnish can be more fully absorbed into the interior of the sensor coil under the action of external pressure to fill the pores and capillaries therein, thereby further improving the impregnation rate of the insulating varnish into the sensor winding.

[0048] In the embodiment of the present application, the primary coil of the sensor and the secondary coil of the sensor are immersed in the segmented dipping method after the primary coil of the sensor is wound and before the secondary coil of the sensor is wound. The primary coil of the sensor is immersed first; after the primary coil of the sensor is immersed and the secondary coil of the sensor is wound, the secondary coil of the sensor is immersed again. The segmented dipping method can prevent the primary coil and the secondary coil of the sensor winding from being tightly wound, the primary coil and the secondary coil layer, and the insulating tape attached to the outside of the primary coil from hindering the insulating varnish from fully entering the interior of the sensor winding, thereby improving the impregnation rate of the insulating varnish. For example, if the segmented dipping method is not adopted, but the winding is immersed in the insulating varnish after the primary coil and the secondary coil of the sensor are wound, at this time, the primary coil and the secondary coil of the sensor winding are tightly wound, which will hinder the flow of the insulating varnish. At the same time, the insulating tape attached between the primary coil and the secondary coil and the outside of the primary coil will also hinder the flow of the insulating varnish, and then the insulating varnish cannot be fully immersed in the interior of the sensor coil.

[0049] In the embodiment of the present application, a vacuum device may be used to perform a vacuum operation on the primary coil of the sensor. For example, a controllable vacuum pump may be used to perform a vacuum operation on the primary coil of the sensor.

[0050] In the embodiment of the present application, the primary coil or the secondary coil may be immersed in the diluted insulating varnish, so that the insulating varnish covers every corner of the sensor coil as much as possible to form a protective layer.

[0051] In the embodiment of the present application, the curing of the insulating varnish refers to the process of converting the insulating varnish from a liquid state to a solid state, wherein a curing device may be used to accelerate the curing of the insulating varnish. Figure 2 , Figure 2 Schematic diagram of the structure of a sensor winding disclosed in an embodiment of the present application. Figure 2 As shown, the sensor winding includes a skeleton 4, a first insulating tape 1, a second insulating tape 2 and a third insulating tape 3, a primary coil 5 of the sensor and a secondary wire 6 of the sensor, wherein the first insulating tape is used for insulation between the enameled wire and the skeleton, and the first insulating tape is a complete insulating tape pasted on the straight rod of the skeleton. Further, the primary coil is wound, and after the winding is completed, the second insulating tape is pasted on the primary coil. Further, the secondary coil is wound, and the third insulating tape is pasted on the secondary coil.

[0052] In an optional embodiment, the vacuum operation of the primary coil includes multiple vacuuming and depressurization, wherein each vacuuming is followed by one depressurization.

[0053] This optional implementation can achieve repeated vacuum operation by performing vacuuming and depressurizing multiple times, wherein the repeated vacuum operation can further remove air and moisture from the primary coil of the sensor, thereby improving the vacuum effect of the primary coil of the sensor.

[0054] With respect to the above optional implementation manner, performing vacuuming and pressure relief multiple times may refer to performing vacuuming and pressure relief three times, or performing vacuuming and pressure relief four times.

[0055] In an optional embodiment, the vacuum operation of the secondary coil includes multiple vacuuming and depressurization, wherein each vacuuming is followed by one depressurization.

[0056] This optional implementation can achieve repeated vacuum operation by performing vacuuming and depressurizing multiple times, wherein the repeated vacuum operation can further remove air and moisture from the secondary coil of the sensor, thereby improving the vacuum effect of the secondary coil of the sensor.

[0057] In an optional embodiment, the vacuum pressure used in the vacuum operation is -0.05 MPA to -0.1 MPA, and the duration of the vacuum operation is 0.6 to 1 hour.

[0058] This optional implementation adopts a vacuum pressure of -0.05MPA to -0.1MPA and a duration of 0.6 to 1H, which can more fully remove the air and moisture in the sensor coil.

[0059] In an alternative embodiment, the curing temperature is 200°C.

[0060] This optional implementation method can solidify the insulating varnish by using the curing temperature parameter of 200° C., while avoiding the insulating varnish being damaged due to excessively high temperature.

[0061] In an optional embodiment, the curing time is 2 to 2.5 hours.

[0062] This optional implementation method can completely cure the insulating varnish through the parameter of curing time 2 to 2.5 hours.

[0063] In an optional embodiment, before immersing the primary coil of the sensor in the insulating varnish, the method further comprises:

[0064] Mix the insulating varnish with the thinner.

[0065] This optional implementation manner can prevent the insulating varnish from being too thick by mixing the insulating varnish with a diluent, thereby preventing the insulating varnish from being too thick and causing a low impregnation rate of the insulating varnish.

[0066] In an optional embodiment, the mixing ratio of the insulating varnish to the thinner is 8:2 to 6:4.

[0067] This optional implementation scheme sets the mixing ratio of the insulating varnish to the diluent to 8:2 to 6:4. On the one hand, it can prevent the insulating varnish from being too thick, and on the other hand, it can avoid excessive diluent, thereby preventing the coating from being too thin due to excessive diluent, affecting the protective effect of the insulating varnish on the sensor winding.

[0068] In an optional embodiment, before mixing the insulating varnish with the diluent to obtain the insulating varnish, the method further comprises:

[0069] Pre-bake the primary coil of the sensor.

[0070] This optional implementation manner can remove part of the moisture inside the primary coil by pre-baking the primary coil of the sensor.

[0071] For the embodiments of this application, as an example, please refer to Figure 3 , Figure 3 FIG. 1 is a flow chart of another sensor winding penetration method disclosed in an embodiment of the present application. Figure 3 As shown, the sensor winding immersion method includes:

[0072] First, stick insulating tape on the frame, then wind the enameled wire tightly on the frame until the specified number of layers are completed, and finally stick a layer of insulating tape on the surface of the primary coil.

[0073] Furthermore, the wound primary coil is pre-baked to remove moisture inside the primary coil.

[0074] Furthermore, the insulating varnish is mixed with a diluent, wherein the mixing ratio is 8:2 to 6:4.

[0075] Furthermore, the primary coil is evacuated for the first time, wherein the vacuum pressure is -0.05 MPA to -0.1 MPA, and the evacuation time is 0.6 to 1 hour.

[0076] Furthermore, the first pressure relief is performed to remove the vacuum pressure.

[0077] Furthermore, the second and third vacuuming and pressure relief of the primary coil are completed in sequence.

[0078] Furthermore, the impregnated primary coil is cured at a temperature of 200° C. for a time of 2 to 2.5 hours.

[0079] Furthermore, based on the winding method and vacuum method of the primary coil, the winding, vacuuming and curing of the secondary coil are completed in sequence.

[0080] Specifically, in the above process, the optimal mixing ratio of the insulating varnish and the diluent is 8:2 to 6:4. The vacuum pressure is -0.05MPA to -0.1MPA; the vacuuming time is 6 times, each time for 0.6 to 1H; the primary coil is vacuumed 3 times, and the secondary coil is vacuumed 3 times; and the pressure is released 6 times, that is, each vacuuming is followed by 1 pressure release.

[0081] In addition, an embodiment of the present application further provides a sensor, which is obtained based on the method of any of the aforementioned implementation modes.

[0082] The sensor of the embodiment of the present application is prepared based on the method of the first aspect, and thus has the advantages of better insulation performance and better mechanical strength.

[0083] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0084] The above are only embodiments of the present application and are not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of protection of the present application.

Claims

1. A sensor winding impregnation method, characterized in that: The method comprises: After the primary coil of the sensor is wound and before the secondary coil of the sensor is wound, immersing the primary coil of the sensor in insulating varnish so that the insulating varnish impregnates the primary coil of the sensor; Performing a vacuum operation on the primary coil of the sensor to place the primary coil in a vacuum state; curing the insulating varnish on the primary coil; After the insulating varnish on the primary coil is cured and the secondary coil of the sensor is wound, immersing the secondary coil of the sensor in the insulating varnish so that the insulating varnish impregnates the secondary coil of the sensor; Performing a vacuum operation on the secondary coil of the sensor to place the secondary coil in a vacuum state; The insulating varnish on the secondary coil is cured.

2. The method according to claim 1, characterized in that The vacuum operation of the primary coil includes multiple vacuuming and depressurizing, wherein each vacuuming is followed by one depressurizing.

3. The method according to claim 1, characterized in that The vacuum operation of the secondary coil includes multiple vacuuming and depressurizing, wherein each vacuuming is followed by one depressurizing.

4. The method according to claim 1, characterized in that The vacuum pressure used in the vacuum operation is -0.05MPA to -0.1MPA, and the duration of the vacuum operation is 0.6 to 1H.

5. The method according to claim 1, characterized in that The curing temperature is 200°C.

6. The method according to claim 5, characterized in that Curing time: 2 to 2.5 hours.

7. The method according to claim 1, characterized in that Before immersing the primary coil of the sensor in the insulating varnish, the method further comprises: The insulating varnish is mixed with a thinner.

8. The method according to claim 7, characterized in that The mixing ratio of the insulating varnish to the thinner is 8:2 to 6:

4.

9. The method according to claim 1, characterized in that Before mixing the insulating varnish with the diluent to obtain the insulating varnish, the method further comprises: The primary coil of the sensor is pre-baked.

10. A sensor, characterized in that: The sensor is prepared based on the method according to any one of claims 1 to 9.

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