An insulation structure of a vibrator transformer for an aviation ignition device

Abstract

The present application belongs to the technical field of electric ignition of aircraft engines, and particularly relates to an insulation structure of a vibrator transformer of an aircraft ignition device, comprising: an insulation frame, an insulation gasket and a coil; the insulation frame comprises a cylinder and circular baffles located at both ends of the cylinder, the circular baffles and the cylinder form a coil winding space, the coil is wound on the cylinder to fill the winding space; an insulation gasket is installed on the annular surface on the inner side of the circular baffle, and the insulation gasket has a radial paint dipping groove, so that when the insulation frame and the coil are dipped in insulating paint, the insulating paint penetrates radially along the paint dipping groove.

Description

Technical Field

[0001] The present application belongs to the technical field of electric ignition of aircraft engines, and in particular relates to an insulation structure of a vibrator transformer of an aviation ignition device. Background Art

[0002] The main function of the transformer used in the existing aircraft engine vibrator ignition device is to oscillate the input DC through the closing and opening between the moving and static contacts of the vibrator transformer, generate a changing current, and the changing current generates a changing magnetic field, and generates high-voltage pulse electricity at the secondary of the transformer through the principle of electromagnetic induction. The insulation design of the vibrator transformer adopts two layers of polyimide film wrapped on the skeleton, and then the wire is wound on the skeleton, and one layer of polyimide film is wound between each layer. After the wire is wound, four layers of polyimide film are wrapped on the outside, and then three layers of alkali-free glass cloth are wrapped, and finally vacuum varnishing is performed. Since the high temperature of the aviation ignition device for a long time is as high as 150°C and the altitude is as high as 20km, and as the environmental factors of the engine are used, if the insulation of the transformer is not enough, turn-to-turn breakdown will occur, resulting in failure. Therefore, the insulation structure design of the transformer is particularly important. Summary of the invention

[0003] In order to solve the above problems, the present application provides an insulation structure of a vibrator transformer of an aviation ignition device, comprising:

[0004] Including insulating frame, insulating gasket and coil;

[0005] The insulating skeleton includes a cylinder and circular baffles located at both ends of the cylinder. The circular baffles and the cylinder form a coil winding space, and the coil is wound on the cylinder to fill the winding space; an insulating gasket is installed on the annular surface inside the circular baffle, and the insulating gasket has a radial paint dipping groove, so that when the insulating skeleton and the coil are dipped in insulating paint, the insulating paint penetrates radially along the paint dipping groove.

[0006] Preferably, two insulating spacers are installed on each circular baffle side.

[0007] Preferably, the two insulating gaskets on the same side of the circular baffle include an outer edge guide insulating gasket and an inner edge guide insulating gasket; the outer edge guide insulating gasket includes a circular ring with a center hole, which has a mounting groove running through the entire annular surface and a plurality of outer edge guide grooves distributed circumferentially, and the outer edge guide grooves extend from the outer edge of the circular ring to a certain position at a distance from the inner edge; the inner edge guide insulating gasket includes a circular ring with a center hole, which has a mounting groove running through the entire annular surface and a plurality of inner edge guide grooves distributed circumferentially, and the inner edge guide grooves extend from the inner edge of the circular ring to a certain position at a distance from the outer edge.

[0008] Preferably, the outer edge guide groove of the outer edge guide insulating gasket and the inner edge guide groove of the inner edge guide insulating gasket are connected during installation.

[0009] Preferably, the outer edge guide groove and the inner edge guide groove are both distributed along the tangential and circumferential directions.

[0010] Preferably, during installation, the installation groove of the outer edge guide insulating gasket is at the same position as the installation groove of the inner edge guide insulating gasket, and the outer edge guide groove and the inner edge guide groove at the same angular position are connected to form a group of cross-shaped or L-shaped guide grooves to expand the guide area.

[0011] Preferably, the insulating frame and the coil are vacuum-impregnated.

[0012] The advantages of this application include: ensuring that the transformer winding can be fully infiltrated into the insulating varnish, greatly improving the inter-turn insulation performance, reliably achieving the purpose of boosting, and thus improving the reliability and service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of an insulating skeleton in a preferred embodiment of the present application;

[0014] Figure 2 It is a schematic diagram of superimposing an outer edge guide insulating gasket and an inner edge guide insulating gasket in a preferred embodiment of the present application. DETAILED DESCRIPTION

[0015] In order to make the technical solution and advantages of the present application clearer, the technical solution of the present application will be further described in detail in detail and in detail in conjunction with the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present application, which are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design. In the absence of conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0016] In addition, it should be noted that, unless otherwise clearly specified and limited, the words "installed", "connected", "connected" and similar terms used in the description of this application should be understood in a broad sense. For example, the connection 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, an indirect connection through an intermediate medium, or the internal connection of two components. Technical personnel in the field can understand their specific meanings in this application according to the specific circumstances.

[0017] like Figure 1-Figure 2 As shown, the present application provides an insulation structure of a vibrator transformer of an aviation ignition device, comprising:

[0018] Including insulating frame, insulating gasket and coil;

[0019] The insulating frame includes a cylinder and circular baffles at both ends of the cylinder, the circular baffles and the cylinder form a coil winding space, the coil is wound on the cylinder to fill the winding space; an insulating gasket is installed on the annular surface inside the circular baffle, and the insulating gasket has a radial paint dipping groove, so that when the insulating frame and the coil are dipped in insulating paint, the insulating paint penetrates radially along the paint dipping groove. Two insulating gaskets are installed on each side of the circular baffle.

[0020] The two insulating gaskets on the same side of the circular baffle include an outer edge guide insulating gasket and an inner edge guide insulating gasket; the outer edge guide insulating gasket includes a circular ring with a center hole, which has a mounting groove running through the entire ring surface and a plurality of outer edge guide grooves distributed circumferentially, and the outer edge guide grooves extend from the outer edge of the circular ring to a certain position away from the inner edge; the inner edge guide insulating gasket includes a circular ring with a center hole, which has a mounting groove running through the entire ring surface and a plurality of inner edge guide grooves distributed circumferentially, and the inner edge guide grooves extend from the inner edge of the circular ring to a certain position away from the outer edge.

[0021] The outer edge guide groove of the outer edge guide insulating gasket is connected with the inner edge guide groove of the inner edge guide insulating gasket during installation. The outer edge guide groove and the inner edge guide groove are both distributed along the tangential circumferential direction, and there are four in total. When the vibrator transformer with the insulating gasket with the paint dipping groove is vacuum-dipped, the insulating paint flows into the groove under negative pressure and flows into the coil, so that the inter-turn gap of the coil is filled with insulating paint, thereby improving the inter-turn insulation performance. Two insulating gaskets are placed crosswise to ensure that the air can be discharged smoothly during the paint dipping, so that the insulating paint soaks the entire coil. The design method of the present invention ensures that the transformer coil can be fully infiltrated with insulating paint, greatly improves the inter-turn insulation performance, reliably achieves the purpose of boosting, and thus improves the reliability and service life of the product. During installation, the installation groove of the outer edge guide insulating gasket is in the same position as the installation groove of the inner edge guide insulating gasket, and the outer edge guide groove and the inner edge guide groove at the same angular position are connected to form a group of cross-shaped or L-shaped guide grooves to expand the diversion area. The insulating skeleton and the coil are vacuum-dipped.

[0022] The advantages of this application include: ensuring that the transformer winding can be fully infiltrated into the insulating varnish, greatly improving the inter-turn insulation performance, reliably achieving the purpose of boosting, and thus improving the reliability and service life of the product.

[0023] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An insulation structure of an ignition device vibrator transformer for aviation, characterized in that: include: Including an insulating frame, an insulating gasket and a coil; The insulating skeleton includes a cylinder and circular baffles located at both ends of the cylinder. The circular baffles and the cylinder form a coil winding space, and the coil is wound on the cylinder to fill the winding space; an insulating gasket is installed on the annular surface inside the circular baffle, and the insulating gasket has a radial paint dipping groove, so that when the insulating skeleton and the coil are dipped in insulating paint, the insulating paint penetrates radially along the paint dipping groove.

2. The insulating structure of the vibrator transformer of the aviation ignition device according to claim 1, characterized in that: Two insulating spacers are installed on each circular baffle side.

3. The insulating structure of the vibrator transformer of the aviation ignition device according to claim 2, characterized in that: The two insulating gaskets on the same side of the circular baffle include an outer edge guide insulating gasket and an inner edge guide insulating gasket; the outer edge guide insulating gasket includes a circular ring with a center hole, which has a mounting groove running through the entire ring surface and a plurality of outer edge guide grooves distributed circumferentially, and the outer edge guide grooves extend from the outer edge of the circular ring to a certain position away from the inner edge; the inner edge guide insulating gasket includes a circular ring with a center hole, which has a mounting groove running through the entire ring surface and a plurality of inner edge guide grooves distributed circumferentially, and the inner edge guide grooves extend from the inner edge of the circular ring to a certain position away from the outer edge.

4. The aviation ignition device vibrator transformer insulation structure according to claim 3, characterized in that: The outer edge guide groove of the outer edge guide insulating gasket is communicated with the inner edge guide groove of the inner edge guide insulating gasket during installation.

5. The insulating structure of the vibrator transformer of the aviation ignition device according to claim 4, characterized in that: The outer edge guide groove and the inner edge guide groove are both distributed along the tangential and circumferential directions.

6. The insulating structure of the vibrator transformer of the aviation ignition device according to claim 5, characterized in that: During installation, the installation groove of the outer edge guide insulating gasket is at the same position as the installation groove of the inner edge guide insulating gasket, and the outer edge guide groove and the inner edge guide groove at the same angular position are connected to form a group of cross-shaped or L-shaped guide grooves to expand the guide area.

7. The insulating structure of the vibrator transformer of the aviation ignition device according to claim 5, characterized in that: The insulation frame and coil are vacuum-impregnated.

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