Discharging device for accelerated equivalent test of aviation magneto transformer

Abstract

The invention relates to a discharging device for an aviation magneto transformer acceleration equivalent test. The discharging device comprises three electrodes, adjusting screws, fixing screws, three supports and an insulation base. The three electrodes are plate-shaped electrodes; the electrode corrosion condition is slow, and the problem that a spark plug test piece is frequently replaced in the test process is solved. Through the method of connecting the plate-shaped discharger with the spark plug test piece in series, the assessment standard of the service life test of the magnetor transformer is enhanced, the accelerated equivalent test is realized, the period of the service life test of the aviation magnetor transformer is shortened, and the reliability of the service life test of the aviation magnetor transformer is improved. And the fault probability of the aviation magneto transformer is reduced.

Description

Technical Field

[0001] The invention relates to the field of performance test of aviation magneto transformer for aviation piston engine, and relates to a discharge device for accelerated equivalent test of aviation magneto transformer. Background Art

[0002] The aviation magneto is the core component of the ignition system of a piston aircraft engine. The transformer is a key component of the aviation magneto. Its function is to ensure that the ignition system works highly reliably and accurately, and to achieve normal and reliable operation of the piston aircraft engine. In order to ensure the reliability of the magneto's performance, a reliability life test must be carried out before the magneto leaves the factory. The life test uses an existing aviation three-pin discharger and takes 600 hours.

[0003] The main problems with using traditional aviation three-pin dischargers are that the life test cycle is relatively long, the cost of test equipment and test personnel is high, the test index redundancy is small, and the fault screening rate of magneto transformer is low. Summary of the invention

[0004] The purpose of the present invention is to accelerate the equivalent test method and the test device of the plate-shaped discharger, shorten the cycle of the life test of the aviation magneto transformer, improve the reliability of the life test of the aviation magneto transformer, and reduce the probability of failure of the aviation magneto transformer.

[0005] The technical solution of the present invention is:

[0006] Provide discharge device for accelerated equivalent test of aviation magneto transformer,

[0007] The circuit of the aviation magneto transformer accelerated equivalent test includes the aviation magneto transformer and the spark plug test piece. The aviation magneto transformer provides high voltage electricity to the spark plug test piece when it is working. The insulation strength and high voltage output capability of the aviation magneto transformer can be judged according to the working status of the spark plug test piece.

[0008] The discharge device comprises three electrodes, an adjustment screw, a fixing screw, three brackets and an insulating base; the three electrodes are all plate-shaped electrodes; the three plate-shaped electrodes are respectively a first electrode, a second electrode and a third electrode, the three plate-shaped electrodes correspond to a first bracket, a second bracket and a third bracket respectively, the three electrodes are in the same horizontal plane and are respectively fixed on the corresponding brackets, and the three electrode brackets are all fixed on the insulating base; the three electrodes are arranged in a straight line, the second electrode is located between the first and third electrodes, and a gap is maintained between the three electrodes, the second electrode has a through hole and is fixedly connected to the second bracket by a fixing screw, the first electrode has a waist-shaped hole and is adjustably connected to the first bracket by an adjustment screw, the third electrode has a waist-shaped hole and is adjustably connected to the third bracket by an adjustment screw; the gap between the second electrode and the first and third electrodes is consistent;

[0009] The first plate-shaped electrode and the third plate-shaped electrode are connected ends, so that the discharge device is connected in series with the spark plug test piece of the aviation magneto transformer accelerated equivalent test; by adjusting the horizontal distance between the first electrode and the third electrode, the voltage of the discharge device can be adjusted, so that the total working voltage of the discharge device and the spark plug test piece can be adjusted; when the horizontal distance between the first electrode and the third electrode is longer, the voltage of the discharge device is higher, and the total working voltage is higher.

[0010] In the present invention, the second plate-shaped electrode is an auxiliary electrode, which forms a gap with the first electrode and the third electrode, and is used to effectively reduce the first breakdown voltage and maintain the stability of the discharge spark.

[0011] Furthermore, the insulation resistance of the gap between the second electrode and the first electrode is not less than 500 megohms, and the insulation resistance of the gap between the second electrode and the third electrode is not less than 500 MΩ.

[0012] Furthermore, the three electrodes are made of copper plates. Preferably, the three electrodes are made of 1 mm copper plates.

[0013] Furthermore, the adjusting screw and the fixing screw are made of brass.

[0014] Furthermore, the three brackets are made of brass or zirconium copper.

[0015] Furthermore, the insulating base is an insulating bakelite board.

[0016] Furthermore, the three plate electrodes are in the same plane.

[0017] Furthermore, the contact resistance between the three electrodes and the corresponding brackets is less than 0.15Ω.

[0018] Furthermore, the spark plug test piece is simulated by an aviation three-needle discharger.

[0019] Technical points of the present invention:

[0020] The electrode erosion between the electrodes of the plate-shaped discharger structure is relatively slow, which solves the problem of frequent replacement of electrodes during the test process. By connecting the plate-shaped discharger in series with the traditional aviation three-pin discharger test method, the assessment standard of the aviation magneto transformer life test is tightened, the accelerated equivalent test is realized, the cycle of the aviation magneto transformer life test is shortened, the reliability of the aviation magneto transformer life test is improved, and the probability of failure of the aviation magneto transformer is reduced.

[0021] The second plate-shaped electrode is an auxiliary electrode, which effectively reduces the first breakdown voltage and maintains the stability of the discharge spark.

[0022] Plate electrodes effectively reduce electrode erosion between electrodes.

[0023] The relative distances between the first plate-shaped electrode and the third plate-shaped electrode relative to the second plate-shaped electrode can be adjusted to control the discharge spark state and the overall breakdown voltage.

[0024] The advantages of the present invention are as follows: the present invention shortens the life test cycle of an aviation magneto transformer, reduces the cost of test equipment and test personnel, and improves the reliability of the life test of an aviation magneto transformer. The probability of failure of an aviation magneto transformer is reduced. The electrode erosion of the present invention is relatively slow, which solves the problem of frequent replacement of spark plug test pieces during the test process. By connecting the spark plug test piece in series with a plate-shaped discharger, the assessment standard of the life test of the magneto transformer is tightened, an accelerated equivalent test is realized, the life test cycle of the aviation magneto transformer is shortened, the reliability of the life test of the aviation magneto transformer is improved, and the probability of failure of the aviation magneto transformer is reduced.

[0025] The second plate-shaped electrode is an auxiliary electrode, which effectively reduces the first breakdown voltage and maintains the stability of the discharge spark. The plate-shaped electrode effectively reduces the electrode erosion between the electrodes.

[0026] The relative distances between the first plate-shaped electrode and the third plate-shaped electrode relative to the second plate-shaped electrode can be adjusted to control the discharge spark state and the overall breakdown voltage. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 It is the circuit principle diagram of the present invention;

[0029] Among them: 1-first electrode, 2-second electrode, 3-third electrode, 4-adjusting screw, 5-fixing screw, 6-bracket, 7-insulating base. DETAILED DESCRIPTION

[0030] The disclosed examples will be more fully described with reference to the accompanying drawings, in which some (but not all) of the disclosed examples are shown. In fact, many different examples may be described and these examples should not be construed as limited to the examples set forth herein. Instead, these examples are described so that this disclosure will be thorough and complete and will fully convey the scope of the disclosure to those skilled in the art.

[0031] Provide discharge device for accelerated equivalent test of aviation magneto transformer,

[0032] The circuit of the aviation magneto transformer accelerated equivalent test includes the aviation magneto transformer and the spark plug test piece. The aviation magneto transformer provides high voltage electricity to the spark plug test piece when it is working. The insulation strength and high voltage output capability of the aviation magneto transformer can be judged according to the working status of the spark plug test piece.

[0033] The discharge device comprises three electrodes, an adjustment screw, a fixing screw, three brackets and an insulating base; the three electrodes are all plate-shaped electrodes; the three plate-shaped electrodes are respectively a first electrode, a second electrode and a third electrode, the three plate-shaped electrodes correspond to a first bracket, a second bracket and a third bracket respectively, the three electrodes are in the same horizontal plane and are respectively fixed on the corresponding brackets, and the three electrode brackets are all fixed on the insulating base; the three electrodes are arranged in a straight line, the second electrode is located between the first and third electrodes, and a gap is maintained between the three electrodes, the second electrode has a through hole and is fixedly connected to the second bracket by a fixing screw, the first electrode has a waist-shaped hole and is adjustably connected to the first bracket by an adjustment screw, the third electrode has a waist-shaped hole and is adjustably connected to the third bracket by an adjustment screw; the gap between the second electrode and the first and third electrodes is consistent;

[0034] The first plate-shaped electrode and the third plate-shaped electrode are connected ends, so that the discharge device is connected in series with the spark plug test piece of the aviation magneto transformer accelerated equivalent test; by adjusting the horizontal distance between the first electrode and the third electrode, the voltage of the discharge device can be adjusted, so that the total working voltage of the discharge device and the spark plug test piece can be adjusted; when the horizontal distance between the first electrode and the third electrode is longer, the voltage of the discharge device is higher, and the total working voltage is higher.

[0035] Furthermore, the insulation resistance of the gap between the second electrode and the first electrode is not less than 500 megohms, and the insulation resistance of the gap between the second electrode and the third electrode is not less than 500 MΩ.

[0036] The three electrodes are made of copper plates. The three electrodes are 1 mm copper plates.

[0037] The adjusting screw and the fixing screw are made of brass.

[0038] The three brackets are made of brass.

[0039] The insulating base is an insulating bakelite board. The three plate-shaped electrodes are on the same plane.

[0040] The contact resistance between the three electrodes and the corresponding brackets is less than 0.15Ω.

[0041] The spark plug test piece is simulated by an aviation three-needle discharger.

[0042] The description of different advantageous arrangements has been presented for purposes of illustration and description, but the description is not intended to be exclusive or limited to examples of the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. Additionally, different advantageous examples may describe different advantages over other advantageous examples. The selected example or examples are chosen and described in order to best illustrate the principles of the examples, the practical application, and to enable those of ordinary skill in the art to understand the disclosure with various examples with various modifications suitable for the particular use contemplated.

Claims

1. A discharge device for accelerated equivalent test of aviation magneto transformer, characterized in that: The circuit of the aviation magneto transformer accelerated equivalent test includes the aviation magneto transformer and the spark plug test piece. The aviation magneto transformer provides high voltage electricity to the spark plug test piece when it is working. The insulation strength and high voltage output capability of the aviation magneto transformer can be judged according to the working status of the spark plug test piece. The discharge device comprises three electrodes, an adjustment screw, a fixing screw, three brackets and an insulating base; the three electrodes are all plate-shaped electrodes; the three plate-shaped electrodes are respectively a first electrode, a second electrode and a third electrode, the three plate-shaped electrodes correspond to a first bracket, a second bracket and a third bracket respectively, the three electrodes are in the same horizontal plane and are respectively fixed on the corresponding brackets, and the three electrode brackets are all fixed on the insulating base; the three electrodes are arranged in a straight line, the second electrode is located between the first and third electrodes, and a gap is maintained between the three electrodes, the second electrode has a through hole and is fixedly connected to the second bracket by a fixing screw, the first electrode has a waist-shaped hole and is adjustably connected to the first bracket by an adjustment screw, the third electrode has a waist-shaped hole and is adjustably connected to the third bracket by an adjustment screw; the gap between the second electrode and the first and third electrodes is consistent; The first plate-shaped electrode and the third plate-shaped electrode are connected ends, so that the discharge device is connected in series with the spark plug test piece of the aviation magneto transformer accelerated equivalent test; by adjusting the horizontal distance between the first electrode and the third electrode, the voltage of the discharge device can be adjusted, so that the total working voltage of the discharge device and the spark plug test piece can be adjusted; when the horizontal distance between the first electrode and the third electrode is longer, the voltage of the discharge device is higher, and the total working voltage is higher.

2. The discharge device for accelerated equivalent test of aviation magneto transformer according to claim 1, characterized in that: The insulation resistance of the gap between the second electrode and the first electrode is not less than 500 megohms, and the insulation resistance of the gap between the second electrode and the third electrode is not less than 500 MΩ.

3. The discharge device for accelerated equivalent test of aviation magneto transformer according to claim 1, characterized in that: The three electrodes are made of copper plates.

4. The discharge device for accelerated equivalent test of aviation magneto transformer according to claim 1, characterized in that: The adjusting screw and the fixing screw are made of brass.

5. The discharge device for accelerated equivalent test of aviation magneto transformer according to claim 1, characterized in that: The three brackets are made of brass or zirconium copper.

6. The discharge device for accelerated equivalent test of aviation magneto transformer according to claim 1, characterized in that: The insulating base is an insulating bakelite board.

7. The discharge device for accelerated equivalent test of aviation magneto transformer according to claim 1, characterized in that: The three plate electrodes are in the same plane.

8. The discharge device for accelerated equivalent test of aviation magneto transformer according to claim 1, characterized in that: The contact resistance between the three electrodes and the corresponding brackets is less than 0.15Ω.

9. The discharge device for accelerated equivalent test of aviation magneto transformer according to claim 1, characterized in that: The spark plug test piece is simulated by an aviation three-needle discharger.

10. The discharge device for accelerated equivalent test of aviation magneto transformer according to claim 3, characterized in that: The three electrodes are 1 mm thick copper plates.

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