CN114709675A

CN114709675A - Electromagnetic compatibility shielding bush of power socket

Info

Publication number: CN114709675A
Application number: CN202111522873.5A
Authority: CN
Inventors: 彭雨豪; 李成武; 任拓
Original assignee: Shaanxi Aero Electric Co Ltd
Current assignee: Shaanxi Aero Electric Co Ltd
Priority date: 2021-12-13
Filing date: 2021-12-13
Publication date: 2022-07-05
Anticipated expiration: 2041-12-13
Also published as: CN114709675B

Abstract

The application belongs to the technical field of electromagnetic shielding, and particularly relates to an electromagnetic compatibility shielding bushing of a power socket and an ignition device with the same. The bushing comprises a first shaft neck (1) and a second shaft neck (2), wherein the first shaft neck (1) and the second shaft neck (2) are provided with penetrating inner through holes, the outer diameter of the first shaft neck (1) is smaller than that of the second shaft neck (2), the first shaft neck (1) is provided with external threads, the first shaft neck (1) is matched with a mounting nut after penetrating through holes reserved in an ignition device side plate and a filter shell, and the second shaft neck (2) is located outside the ignition device side plate and is provided with a mounting end for mounting a socket. The present application provides an ignition device comprising the bushing described above. The electromagnetic radiation in the ignition device shell can not be coupled to the input line, and can not be transmitted to the outside of the shell, so that the electromagnetic shielding characteristic of the ignition electric nozzle is improved.

Description

Electromagnetic compatibility shielding bush of power socket

Technical Field

The application belongs to the technical field of electromagnetic shielding, and particularly relates to an electromagnetic compatibility shielding bushing of a power socket.

Background

At present, the problem that electromagnetic compatibility exceeds the standard occurs in the use process of an ignition device, and structural improvement design is carried out aiming at the problem. In order to ensure the overall performance and the use reliability of the aircraft engine, the influence of electromagnetic compatibility is strictly controlled. At present, the ignition device is difficult to pass a CE102 power line conduction emission test and a RE102 magnetic field radiation emission test in GBJ 151B requirements only by an internal filter. Therefore, there is a need for an improved emi shielding structure at the outlet connection of an ignition device.

The function of the ignition device is to convert low voltage dc or ac electrical energy into high voltage pulses. The electric energy is provided by a power supply system, is filtered by a filter, is rectified by a high-voltage silicon stack after being boosted by a transformer, is continuously stored in an energy storage capacitor, and when the voltage at two ends of the energy storage capacitor reaches the discharge voltage of a discharge tube, the discharge tube is conducted, and all the electric energy in the energy storage capacitor is released to a rear-stage circuit to form high-voltage pulse.

The circuit components in the ignition device mainly comprise a filter, a transformer, a capacitor and a discharge tube. When the discharge tube discharges, the internal voltage of the circuit reaches 10KV at the moment of system conduction, and the electromagnetic radiation in the device leaks to the outside through the power socket. The effect of filtering only by means of the filter is limited, and the functional performance of the ignition device is affected if filtering components in the filter are added.

Disclosure of Invention

In order to solve the above technical problem, the present application provides an electromagnetic compatibility shielding bushing of an electrical outlet, so that electromagnetic radiation inside an ignition device housing cannot be coupled to an input line and cannot be propagated to the outside of the housing.

The utility model provides a supply socket electromagnetic compatibility shields bush, including first axle journal and second axle journal, first axle journal has the interior through-hole that runs through with the second axle journal, the external diameter of first axle journal is less than the external diameter of second axle journal, just first axle journal has the external screw thread, after the through-hole of reserving on ignition curb plate and the wave filter casing was passed to first axle journal, adaptation mounting nut, the second axle journal is located the ignition curb plate outside, and it has the installation end for the erection socket.

Preferably, the first journal and the second journal form a step surface on an outer wall surface, and the bushing is welded on the ignition device side plate at the step surface through argon arc welding.

Preferably, a plurality of screw holes are formed in the periphery of the end portion of the second journal, and the screw holes are used for being connected with the socket.

Preferably, the nut comprises a first portion with an internal thread and a second portion axially connected to the first portion, the outer wall of the second portion having a wrenching notch.

The utility model provides an ignition, including wave filter, transformer, rectification energy memory and discharge tube, wherein, the wave filter has the wave filter casing, transformer rectification energy memory and discharge tube all are located the ignition casing, and the ignition casing has the lateral wall, the lateral wall has first trompil, the wave filter casing has the second trompil, as above the first journal of supply socket electromagnetic compatibility shielding bush pass behind the through-hole of reserving on ignition curb plate and the wave filter casing, the adaptation mounting nut is used for with the wave filter casing with the curb plate of ignition casing is fixed together, the second journal of supply socket electromagnetic compatibility shielding bush is located the curb plate outside of ignition casing for be connected with the socket of input power.

This application has improved the electromagnetic shielding characteristic of ignition electric nozzle through setting up the bush.

Drawings

Fig. 1 is a schematic diagram of a bushing structure of a preferred embodiment of an electromagnetic compatibility shielding bushing for an electrical outlet according to the present application.

FIG. 2 is a right side view of the bushing configuration of the embodiment of the present application shown in FIG. 1.

Fig. 3 is a schematic structural view of the nut of the embodiment shown in fig. 1 of the present application.

Fig. 4 is a schematic view of a bushing mounting structure according to the embodiment of fig. 1 of the present application.

Fig. 5 is a schematic view of the structure of the ignition device of the present application.

FIG. 6 is a diagram of a first AC power pin for a CE102 power line conduction test in the prior art.

FIG. 7 is a diagram of a second AC power pin for a CE102 power line conduction test in the prior art.

FIG. 8 is a schematic diagram of a prior art RE102 magnetic field radiation perpendicular to 2MHz to 1GHz test.

FIG. 9 is a schematic diagram of a CE102 power line conduction test first AC power pin modified according to the present application.

Fig. 10 is a schematic diagram of a CE102 power line conduction test second ac power pin modified by the present application.

FIG. 11 is a schematic diagram of the RE102 magnetic field radiation perpendicular to the 2MHz to 1GHz test, modified by the present application.

Wherein 1-first journal, 2-second journal, 21-screw hole, 3-first part, 4-second part, 5-bushing, 6-filter, 7-nut, 8-connector, 9-power line, 10-filter housing, 11-ignition housing, 12-transformer.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all embodiments of the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application, and should not be construed as limiting the present application. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application. Embodiments of the present application will be described in detail below with reference to the drawings.

The first aspect of the present application provides a supply socket electromagnetic compatibility shields bush, as shown in fig. 1-4, bush 5 includes first journal 1 and second journal 2, and first journal 1 has the interior through-hole that runs through with second journal 2, the external diameter of first journal 1 is less than the external diameter of second journal 2, just first journal 1 has the external screw thread, after first journal 1 passes the through-hole that reserves on ignition curb plate and the filter casing 10, adaptation mounting nut 7, second journal 2 is located the ignition curb plate outside, and it has the mounting end for the installation socket.

In this embodiment, through holes for mounting the bushing are reserved in the side plate of the ignition device and the filter housing, the end of the bushing having a thread is passed through the side plate and then through the filter housing, and the bushing is fastened by a special nut inside the filter housing. The filter housing and the ignition device housing are tightly attached together. Thus, electromagnetic radiation inside the ignition device housing cannot be coupled to the input line and also cannot propagate outside the housing. The material of the bushing is the same as that of the shell of the ignition device, and the bushing is welded on the side plate of the shell in an argon arc welding mode.

In some alternative embodiments, the first journal 1 and the second journal 2 form a step surface on an outer wall surface, and the bush is welded to the ignition device side plate at the step surface by argon arc welding.

In some alternative embodiments, the end of the second journal 2 is provided with a plurality of screw holes 21 around, and the screw holes 21 are used for connecting the socket.

In some alternative embodiments, the nut comprises a first portion 3 with an internal thread, and a second portion 4 axially connected to the first portion 3, the outer wall of which has a wrenching notch.

In a second aspect, the present application provides an ignition device, as shown in fig. 5, comprising a filter 6, a transformer 12, a rectifying energy storage device and a discharge tube, wherein the filter 6 has a filter housing 10, the rectifying energy storage device of the transformer and the discharge tube are all located in an ignition device housing 11, the ignition device housing 11 has a side wall, the side wall has a first opening, the filter housing 10 has a second opening, after the first journal 1 of the power socket electromagnetic compatibility shielding bushing 5 passes through the ignition device side plate and the through hole reserved on the filter housing, the first journal is adapted with a mounting nut 7 for fixing the filter housing and the side plate of the ignition device housing together, the second journal 2 of the power socket electromagnetic compatibility shielding bushing is located outside the side plate of the ignition device housing for connecting with the socket of the input power supply, i.e. with the connector 8.

The utility model provides an ignition casing and filter casing closely laminate for the inside interference of ignition casing is blockked, and inside the ignition casing, carry out electromagnetic interference through the inside interference equipment of device, through the cooperation of bush 5 and nut 7, make power cord 9 department not have the electromagnetism to reveal.

The electromagnetic compatibility test was conducted when the igniter was equipped with only the filter, the items being CE102 and RE102, and the test results are shown in fig. 6 to 8. The results of the tests performed with the ignition device incorporating the emc shield structure are shown in fig. 9 to 11. Therefore, the electromagnetic compatibility test verifies that the filter effect of the ignition device is good.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The utility model provides an electrical socket electromagnetic compatibility shields bush, characterized in that, includes first journal (1) and second journal (2), first journal (1) and second journal (2) have the interior through-hole that runs through, the external diameter of first journal (1) is less than the external diameter of second journal (2), just first journal (1) has the external screw thread, first journal (1) pass ignition curb plate and filter housing on reserve the through-hole after, adaptation mounting nut, second journal (2) are located the ignition curb plate outside, and it has the installation end for the installation socket.

2. An outlet emc shielding bushing according to claim 1, wherein said first journal (1) and said second journal (2) form a step surface on an outer wall surface, and said bushing is welded to said ignition device side plate at said step surface by argon arc welding.

3. An electric outlet emc shielding bushing according to claim 1, characterized in that the second journal (2) is provided with a plurality of screw holes (21) around its end, said screw holes (21) being adapted to be connected to said electric outlet.

4. An electric outlet emc shield bush according to claim 1, characterized in that the nut comprises a first part (3) with an internal thread and a second part (4) axially connected to the first part (3), the outer wall of the second part having a wrenching notch.

5. An ignition device comprising a filter, a transformer, a rectifying energy storage device and a discharge tube, wherein the filter has a filter housing, the rectifying energy storage device of the transformer and the discharge tube are all located in the ignition device housing, the ignition device housing has a side wall, the side wall has a first opening, the filter housing has a second opening, the first journal (1) of the power socket electromagnetic compatibility shielding bushing of claim 1 passes through the through holes reserved on the ignition device side plate and the filter housing, and then the first journal is adapted with a mounting nut for fixing the filter housing and the side plate of the ignition device housing together, and the second journal (2) of the power socket electromagnetic compatibility shielding bushing is located outside the side plate of the ignition device housing for connecting with a socket of an input power supply.