High-stability core-penetrating high-voltage ceramic capacitor

Abstract

The application discloses a high-pressure ceramic capacitor with high stability, which comprises a metal base and a mounting hole, the surface of the metal base is processed with the mounting hole, the inner wall of the metal base is fixedly connected with a lower ceramic shell, the inner wall of the lower ceramic shell is fixedly connected with a lower insulating sleeve, the inner wall of the lower insulating sleeve is mounted with insulating resin, and the upper end of the lower ceramic shell is connected with a fixing mechanism. Different lengths of supporting blocks on the supporting ring are prepared in advance to control the distance of the circular sleeve, the distance of the dielectric ceramic body on the circular sleeve between the upper insulating sleeves is controlled, the supporting ring is pushed into the upper insulating sleeve from the lower end, the outer wall of the supporting ring is tightly fixed with the upper insulating sleeve, the electric field distribution and the storage charge capacity in the capacitor are adjusted, the change of the capacitance value is changed, the gap between the adjacent ceramic dielectric bodies can be adjusted, and the stability of the capacitance value is improved.

Description

Technical Field

[0001] This utility model relates to the field of ceramic capacitor technology, and in particular to a high-stability through-core high-voltage ceramic capacitor. Background Technology

[0002] Microwave ovens and similar microwave devices require high-power microwaves, which can be obtained using magnetrons. However, to prevent electromagnetic wave leakage from the magnetron, it is placed in a shielded metal box, and a high-voltage ceramic through-core capacitor is used as a bypass filter.

[0003] For example, the magnetron feedthrough type dual high-voltage ceramic capacitor with announcement number "CN2671100Y" solves the problem of existing magnetron feedthrough type dual high-voltage ceramic capacitors easily generating electric sparks in DC high-voltage environments, ultimately causing the feedthrough capacitor to fail. By making the feedthrough conductor and metal cap into an integrated structure, the source of electric sparks is eliminated without welding between the two, thus saving a welding process. Considering that the gap between adjacent ceramic dielectric bodies in existing magnetron feedthrough type dual high-voltage ceramic capacitors cannot be adjusted, the gap between the ceramic dielectric bodies will affect the electric field distribution and charge storage capacity of the capacitor, resulting in poor capacitance stability. Summary of the Invention

[0004] This invention aims to solve the problems existing in the prior art by providing a high-stability through-core high-voltage ceramic capacitor. The gap between adjacent ceramic dielectric bodies cannot be adjusted, resulting in poor stability of the capacitance value.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows:

[0006] A high-stability through-core high-voltage ceramic capacitor is designed, comprising a metal base and mounting holes. The surface of the metal base is machined with mounting holes. The inner wall of the metal base is fixedly connected to a lower ceramic shell. The inner wall of the lower ceramic shell is fixedly connected to a lower insulating sleeve. The inner wall of the lower insulating sleeve is fitted with insulating resin. A fixing mechanism is connected to the upper end of the lower ceramic shell.

[0007] Further improvements include a fixing mechanism comprising a protruding strip, the outer wall of which is engaged with the lower ceramic shell, the upper end of which is fixedly connected to the upper insulating sleeve, the outer wall of which is fixedly connected to the upper ceramic shell, and the inner wall of which is threadedly connected to a metal threaded head.

[0008] Further improvements include an electrical connection between the lower end of the metal threaded head and a conductor, and an adjustment mechanism connected to the inner wall of the upper insulating sleeve.

[0009] Further improvements include the adjustment mechanism comprising a support ring, the outer wall of which abuts against the upper insulating sleeve, the inner side of which is fixedly connected to a support block, the end of which is fixedly connected to a circular sleeve, and the inner wall of which is fixedly connected to a dielectric ceramic body.

[0010] Further improvements include: the outer wall of the middle part of the conductor is attached to the dielectric ceramic body; the outer wall of the conductor is fixedly connected to the metal cap; and the outer wall of the metal cap is movably connected to the dielectric ceramic body.

[0011] Further improvements include a fixed connection between the lower outer wall of the conductor and the insulating sleeve.

[0012] The beneficial effects of this utility model are as follows: By pre-fabricating support blocks of different lengths on the support ring to control the distance of the circular sleeve, the distance between the dielectric ceramic body on the circular sleeve and the upper insulating sleeve can be controlled. This allows the support ring to be pushed into the upper insulating sleeve from the bottom, so that the outer wall of the support ring is tightly fixed against the upper insulating sleeve. This allows the electric field distribution and charge storage capacity within the capacitor to be adjusted, thereby enabling changes in the capacitance value and allowing the gap between adjacent ceramic dielectric bodies to be adjusted, thus improving the stability of the capacitance value. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0014] Figure 2 for Figure 1 A frontal sectional view;

[0015] Figure 3 for Figure 2 A top-view sectional diagram;

[0016] Figure 4 for Figure 2 Enlarged sectional view of part A in the middle:

[0017] Figure 5 for Figure 2 Enlarged sectional view of section B:

[0018] Figure 6 for Figure 3 Enlarged sectional view of section C.

[0019] Explanation of reference numerals in the attached figures: 1. Metal base; 2. Mounting hole; 3. Lower ceramic shell; 4. Lower insulating sleeve; 5. Insulating resin; 6. Fixing mechanism; 601. Raised strip; 602. Upper insulating sleeve; 603. Upper ceramic shell; 604. Metal threaded head; 7. Conductor; 8. Adjustment mechanism; 801. Support ring; 802. Support block; 803. Circular sleeve; 804. Dielectric ceramic body; 9. Metal cap; 10. Insulating sleeve. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] Example 1:

[0022] See attached document Figure 1-6 In this embodiment, a high-stability through-core high-voltage ceramic capacitor includes a metal base 1 and mounting holes 2. The surface of the metal base 1 is machined with mounting holes 2. The inner wall of the metal base 1 is fixedly connected to the lower ceramic shell 3. The inner wall of the lower ceramic shell 3 is fixedly connected to the lower insulating sleeve 4. The inner wall of the lower insulating sleeve 4 is fitted with insulating resin 5. The upper end of the lower ceramic shell 3 is connected to a fixing mechanism 6.

[0023] The fixing mechanism 6 includes a protrusion 601, which is connected to the lower ceramic shell 3 through the outer wall of the protrusion 601, so that the upper ceramic shell 603 and the lower ceramic shell 3 are fixed together. The outer wall of the protrusion 601 is locked to the lower ceramic shell 3. The upper end of the protrusion 601 is fixedly connected to the upper insulating sleeve 602. The outer wall of the upper insulating sleeve 602 is fixedly connected to the upper ceramic shell 603. The inner wall of the upper ceramic shell 603 is threadedly connected to the metal threaded head 604.

[0024] The lower end of the metal threaded head 604 is electrically connected to the conductor 7. An adjustment mechanism 8 is connected to the inner wall of the upper insulating sleeve 602. The adjustment mechanism 8 can be freely disengaged from the upper insulating sleeve 602 through the support ring 801, so that the adjustment mechanism 8 can be replaced on the upper insulating sleeve 602. This achieves the effect of adjusting the distance between the circular sleeve 803 on the support block 802 and the upper insulating sleeve 602. The adjustment mechanism 8 includes a support ring 801. The outer wall of the support ring 801 abuts against the upper insulating sleeve 602. The inner side of the support ring 801 is fixedly connected to the support block 802. The end of the support block 802 is fixedly connected to the circular sleeve 803. The inner wall of the circular sleeve 803 is fixedly connected to the dielectric ceramic body 804.

[0025] By pre-fabricating support blocks 802 of different lengths on the support ring 801, the distance of the circular sleeve 803 is controlled, thereby controlling the distance between the dielectric ceramic body 804 on the circular sleeve 803 and the upper insulating sleeve 602. This allows the support ring 801 to be pushed into the upper insulating sleeve 602 from the bottom, so that the outer wall of the support ring 801 is tightly fixed against the upper insulating sleeve 602. This adjusts the electric field distribution and charge storage capacity within the capacitor, thereby enabling changes in capacitance value and adjusting the gap between adjacent ceramic dielectric bodies, thus improving the stability of the capacitance value.

[0026] The outer wall of the middle part of conductor 7 is attached to the dielectric ceramic body 804, the outer wall of conductor 7 is fixedly connected to the metal cap 9, the outer wall of the metal cap 9 is movably connected to the dielectric ceramic body 804, and the outer wall of the lower part of conductor 7 is fixedly connected to the insulating sleeve 10.

[0027] Working principle:

[0028] By pre-fabricating support blocks 802 of varying lengths on the support ring 801, the distance of the circular sleeve 803 is controlled, thereby controlling the distance between the dielectric ceramic bodies 804 on the circular sleeve 803 and the upper insulating sleeve 602. The length of the support blocks 802 is controlled by the overall replacement and adjustment mechanism 8, which also adjusts the spacing between the dielectric ceramic bodies 804 on the circular sleeve 803. This allows for easy adjustment of the electric field distribution and charge storage capacity within the capacitor according to usage requirements, enabling changes in capacitance value. This prevents the dielectric ceramic bodies 804 from cracking during use, improving stability. Pressing the upper ceramic shell 603... The protruding strip 601 will be inserted into the interior of the lower ceramic shell 3, and the upper ceramic shell 603 will be attached and fixed to the lower ceramic shell 3. At the same time, the insulating resin 5 is poured into the upper insulating sleeve 602 and the lower insulating sleeve 4 from the top, which facilitates the venting of the upper insulating sleeve 602 and the lower insulating sleeve 4 and the drying of the surrounding area, so that the insulation performance of the products inside the upper insulating sleeve 602 and the lower insulating sleeve 4 can reach more than 10KV·AC. The threaded metal head 603 is screwed into the upper ceramic shell 603, ensuring that the interior of the threaded metal head 603 forms an electrical contact with the conductor 7. The threaded metal head 603 is then electrically connected to the circuit board in the external electrical appliance, so that the whole device can play a role in demagnetizing and filtering the electrical appliance.

[0029] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A high-stability through-core high-voltage ceramic capacitor, comprising a metal base (1) and mounting holes (2), wherein the surface of the metal base (1) is machined with mounting holes (2), characterized in that: The inner wall of the metal base (1) is fixedly connected to the lower ceramic shell (3), the inner wall of the lower ceramic shell (3) is fixedly connected to the lower insulating sleeve (4), the inner wall of the lower insulating sleeve (4) is fitted with insulating resin (5), and the upper end of the lower ceramic shell (3) is connected to a fixing mechanism (6).

2. The high-stability feedthrough high-voltage ceramic capacitor according to claim 1, characterized in that: The fixing mechanism (6) includes a protrusion (601), the outer wall of which is engaged with the lower ceramic shell (3), the upper end of which is fixedly connected to the upper insulating sleeve (602), the outer wall of which is fixedly connected to the upper ceramic shell (603), and the inner wall of which is threaded to a metal threaded head (604).

3. The high-stability feedthrough high-voltage ceramic capacitor according to claim 2, characterized in that: The lower end of the metal threaded head (604) is electrically connected to the conductor (7), and the inner wall of the upper insulating sleeve (602) is connected to an adjustment mechanism (8).

4. The high-stability feedthrough high-voltage ceramic capacitor according to claim 3, characterized in that: The adjustment mechanism (8) includes a support ring (801), the outer wall of which abuts against the upper insulating sleeve (602), the inner side of which is fixedly connected to the support block (802), the end of which is fixedly connected to the circular sleeve (803), and the inner wall of which is fixedly connected to the dielectric ceramic body (804).

5. The high-stability feedthrough high-voltage ceramic capacitor according to claim 3, characterized in that: The outer wall of the middle part of the conductor (7) is attached to the dielectric ceramic body (804), the outer wall of the conductor (7) is fixedly connected to the metal cap (9), and the outer wall of the metal cap (9) is movably connected to the dielectric ceramic body (804).

6. The high-stability feedthrough high-voltage ceramic capacitor according to claim 3, characterized in that: The lower outer wall of the conductor (7) is fixedly connected to the insulating sleeve (10).

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