CN102810362B - High-voltage tapered insulator structure with grounding external shields - Google Patents
High-voltage tapered insulator structure with grounding external shields Download PDFInfo
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- CN102810362B CN102810362B CN201210246311.7A CN201210246311A CN102810362B CN 102810362 B CN102810362 B CN 102810362B CN 201210246311 A CN201210246311 A CN 201210246311A CN 102810362 B CN102810362 B CN 102810362B
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Abstract
The invention relates to a high-voltage tapered insulator structure with grounding external shields. The high-voltage tapered insulator structure with the grounding external shields is characterized in that insulator tapered sections are arranged between an output line inner cylinder and an output line outer cylinder, the insulator tapered sections are connected with diode outer cylinders through insulator low-voltage sections, and the insulator tapered sections are connected with the output line inner cylinder through insulator high-voltage sections; the insulator high-voltage sections are connected with high-voltage shielding rings; and the output line outer cylinder comprises first grounding shielding rings, and second grounding shielding rings are connected with the diode outer cylinders. The high-voltage tapered insulator structure with the grounding external shields has the advantages that the grounding shielding ring structures reduce field intensity on the low-voltage side of a tapered insulator, and improve internal field intensity of the low-voltage section of the insulator and surface flashover of a vacuum interface; a vacuum insulator tapered face has the characteristics of small field intensity on a high-voltage side and large field intensity on a low-voltage side; and when the tapered face and an axis form a 30-degree angle, a power line and the tapered face form an angle of 45 degrees, flashover threshold is low, and vacuum surface field intensity is less than 60kV/cm.
Description
Technical field
The invention belongs to Pulse Power Techniques field, relate to a kind of high voltage taper insulation system.
Background technology
Along with the development of High pulse power technology, energetic particle beam is widely used in the numerous areas such as the testing of materials, X ray generation, microwave generation, laser pumping, thermonuclear fusion, group's particle acceleration.High-Voltage Insulation of vacuum high current diode cavity is a vitals of high current diode cavity, connects negative electrode pedestal and anode, plays the effect of supporting fixed negative pole, and as the part on vacuum cavity border.
Conical insulator is a kind of insulation system that diode vacuum cavity is conventional, and vacuum interface and the power line of insulator have a certain degree, and improve edge flashing.The pulse feed-in of high current diode often adopts coaxial pulse output line structure, insulator except cone section, the low pressure stage and the high pressure section that are connected with urceolus with output line inner core respectively in addition.At the high pressure section of insulator, the shading ring of emitting cathode has been avoided the electron emission of triple point.
Existing conical insulator structure, it is inhomogeneous along face field strength distribution, and especially low pressure stage field intensity is large, and the experimental result of long-time repetition operation confirms that internal breakdown easily appears in low pressure stage.There are a large amount of minute impurities in the industrial insulating material inside of large molded dimension, the dissipation energy at impurity place runs up to and to a certain degree causes insulation breakdown in long-time repetition running.
Summary of the invention
For fear of the deficiencies in the prior art part, the present invention proposes a kind of high voltage taper insulation system of external shield with ground, solves the internal breakdown problem of conical insulator low pressure stage.
A high voltage conical insulator structure for external shield with ground, is characterized in that comprising insulator low pressure stage 5, the first earth terminal shading ring 3, the second earth terminal shading ring 6, insulator cone section 7 and insulator high pressure section 8; Between output line inner core and output line urceolus, be provided with insulator cone section 7, insulator cone section 7 forms 30 ° of angles with the axis of output line inner core; Insulator cone section 7 is connected with diode urceolus by insulator low pressure stage 5, and by with insulator low pressure stage 5 tie points to the radius of diode urceolus tie point transition being 0.29 times of urceolus radius; Insulator cone section 7 is connected with output line inner core by insulator high pressure section 8; Insulator high pressure section 8 is connected with high-tension shielding ring 9; Be provided with the second earth terminal shading ring 6 with insulator low pressure stage 5 flat plate section distances for the position of d, tangent with diode urceolus and be electrically connected to, its radius is 0.29 times of urceolus radius; Described is 0.26 times of urceolus radius apart from d.
Described insulator low pressure stage 5, insulator cone section 7 and insulator high pressure section 8 are overall structure.
Described insulator low pressure stage 5, insulator cone section 7 and insulator high pressure section 8 adopt nylon material.
The high voltage taper insulation system of a kind of external shield with ground that the present invention proposes, advantage is: earth shield ring structure reduces the field intensity of conical insulator low-pressure side, that improves the inside field intensity of insulator low pressure stage and vacuum interface dodges Lip river along face; The vacuum insulation conical surface has the advantages that high-pressure side field intensity is little, low-pressure side field intensity is large, and the conical surface and axis are during into about 30 degree angle, and power line and the conical surface are miter angle, dodges Lip river threshold value low, and vacuum is less than 60kV/cm along face field intensity.
Accompanying drawing explanation
Fig. 1: be the high voltage taper insulation system of a kind of external shield with ground of the present invention
1. output line inner core; 2. output line urceolus; 3. the first earth terminal shading ring; 4. diode urceolus; 5. insulator low pressure stage; 6. the second earth terminal shading ring; 7. insulator is bored section; 8. insulator high pressure section; 9. high-tension shielding ring.
Embodiment
Now in conjunction with the embodiments, the invention will be further described for accompanying drawing:
The high voltage conical insulator of the present embodiment is overall structure, nylon material, from function be divided into insulator cone section 7, with the insulator low pressure stage of external shield with the insulator high pressure section of external shield totally three parts; Insulator low pressure stage 5 connects earth terminal, and earth terminal comprises output line urceolus 2 and diode urceolus 4, and the first earth shield ring 3 and the second earth shield ring 6; Insulator high pressure section 8 connects high-voltage electrode, and high-voltage electrode comprises high voltage shielded ring 9.
Described insulator cone section 7 is main parts of insulator, bears most pressure drop.In uniform external field, the vacuum insulation conical surface has the advantages that high-pressure side field intensity is little, low-pressure side field intensity is large.Conical surface field intensity and insulator tapering theta, the dielectric constant of insulating material, the factor analysis such as radially outer field distribution of output line.Output line urceolus inside radius Rout_TL, output line inner core radius R inn_TL=0.2Rout_TL, diode urceolus radius R out_diode=1.16Rout_TL, output line medium is transformer oil, when insulator tapering theta is about 30 while spending, vacuum insulation interface becomes miter angle with power line, now has best insulation, and vacuum conical surface maximum field strength is less than 60kV/cm.The thickness d of insulator cone section, integral insulation bears the weight of output line inner core, and the suction of vacuum.
Described insulator low pressure stage 5, it is insulator cone section and the linkage section of output line urceolus low-field electrode, insulator low pressure stage can be described as flat plate section (the maximum outer radius Rout_insulator=1.23Rout_TL of insulator being connected with cavity flange, flat plate section thickness L1=0.17Rout_TL, the inside radius Rinn_plate=1.02Rout_TL of the output line side of flat plate section), with and the rounding off that is connected with insulator cone section partly (knuckle radius R2=0.29Rout_TL).The intrinsic feature of conical insulator structure itself is that the field intensity of its low-pressure side is large, the low pressure rounding off part of insulator, and it is all large along face field intensity and body field intensity.Dodging Lip river along face and can be developed to low pressure flange herein, easily there is body and puncture in minute impurities herein, and impurity dissipation energy runs up to and to a certain degree causes that body punctures in long-time repetition running.The contiguous low-voltage external shield ring a of insulator low pressure stage and low-voltage external shield ring b, low pressure shading ring can reduce the field intensity of conical insulator low pressure stage, comprises that inner field intensity and vacuum are along face field intensity.Insulator low pressure stage regional structure is complicated, and vacuum insulation interface becomes the condition of miter angle to meet with power line, and the design field intensity of insulator low pressure stage is far below 60kV/cm.The local field strength of low-voltage external shield ring a is less than 200kV/cm, the circular section radius R 1=0.043Rout_TL of low-voltage external shield ring a, center radius R_shield_a=0.98Rout_TL.The local field strength of low-voltage external shield ring b is less than 240kV/cm, and the radius R 3=0.086Rout_TL of low-voltage external shield ring b, apart from insulator low-pressure panel section vacuum surface distance L 2=0.26Rout_TL.Low-voltage shading ring b is tangent with diode urceolus and be electrically connected to.
Described insulator high pressure section 8 is insulator cone sections and the linkage section of output line inner core 1 high-field electrode, and edge high pressure section can be described as the cylindrical section being connected with output line inner core, with and bore section rounding off part being connected with insulator.The output line of coaxial configuration, the radial distribution trend in outfield is large near inner core field intensity, little near urceolus field intensity.The contiguous high voltage external shield of insulator high pressure section ring, high-tension shielding ring is avoided the electron emission of triple point (intersection point of insulator, vacuum, negative electrode), reduces the interior field intensity of insulator high pressure section and along face field intensity.High-tension shielding ring surface field intensity is less than 240kV/cm.
The output line urceolus inside radius Rout_TL=350mm of the present embodiment, nylon insulator cone angle 30 degree, exterior insulator size Φ 860mm * 585mm, makes die casting moulding.The outer drum flange 2 of the low pressure stage 5 of insulator and output line and the outer drum flange 4 of diode are connected, and the oil gas of the sealing ring assurance insulator both sides by flange face is isolated.The high pressure section 8 of insulator is connected with high-tension shielding ring 9 with output line inner core 1.The emitting cathode of diode is connected with high-tension shielding ring 9, and the positive plate of diode is connected with the urceolus of diode 4, and cathode emission face keeps certain distance with positive plate.The first earth shield ring 3 is the part of the flange of output line urceolus 2, and the second earth shield ring 6 is electrically connected to diode urceolus 4.
The insulation system of the present embodiment has passed through the test of 50Hz repetition operation minute magnitude, diode voltage 2MV, pulsewidth 55ns on high-power pulse source.
Claims (3)
1. a high voltage conical insulator structure for external shield with ground, is characterized in that comprising insulator low pressure stage (5), the first earth terminal shading ring (3), the second earth terminal shading ring (6), insulator cone section (7) and insulator high pressure section (8); Between output line inner core and output line urceolus, be provided with insulator cone section (7), insulator cone section (7) forms 30 ° of angles with the axis of output line inner core; Insulator cone section (7) is connected with diode urceolus by insulator low pressure stage (5), and by with insulator low pressure stage (5) tie point to the radius of diode urceolus tie point transition being 0.29 times of urceolus radius; Insulator cone section (7) is connected with output line inner core by insulator high pressure section (8); Insulator high pressure section (8) is connected with high-tension shielding ring (9); Be provided with the second earth terminal shading ring (6) with insulator low pressure stage (5) flat plate section distance for the position of d, tangent with diode urceolus and be electrically connected to, its radius is 0.29 times of urceolus radius; Described is 0.26 times of urceolus radius apart from d.
2. the high voltage conical insulator structure of external shield with ground according to claim 1, is characterized in that: described insulator low pressure stage (5), insulator cone section (7) and insulator high pressure section (8) are overall structure.
3. the high voltage conical insulator structure of external shield with ground according to claim 1, is characterized in that: described insulator low pressure stage (5), insulator cone section (7) and insulator high pressure section (8) adopt nylon material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210246311.7A CN102810362B (en) | 2012-07-17 | 2012-07-17 | High-voltage tapered insulator structure with grounding external shields |
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| CN201210246311.7A CN102810362B (en) | 2012-07-17 | 2012-07-17 | High-voltage tapered insulator structure with grounding external shields |
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| CN102810362B true CN102810362B (en) | 2014-05-07 |
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| CN109451647B (en) * | 2018-11-01 | 2020-08-07 | 中国人民解放军国防科技大学 | High current diode cone ceramic package vacuum interface insulation structure |
| CN111161930B (en) * | 2020-01-03 | 2021-07-02 | 西北核技术研究院 | Vacuum insulator with composite structure and preparation method thereof |
| CN111462959B (en) * | 2020-04-15 | 2022-02-01 | 中国工程物理研究院应用电子学研究所 | Vacuum high-voltage pulse insulation structure |
| CN114420390B (en) * | 2022-01-19 | 2023-10-24 | 西北核技术研究所 | High-voltage vacuum insulator embedded with grounding inductor |
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| CN1242869A (en) * | 1997-01-02 | 2000-01-26 | 应用先进技术公司 | Electron beam accelerator |
| CN1149404C (en) * | 1999-03-23 | 2004-05-12 | 中国石油集团测井有限公司技术中心 | Plate for high-temperature, high-pressure and micro-resistivity scanning and imaging logging instrument |
| US6798865B2 (en) * | 2002-11-14 | 2004-09-28 | Ge Medical Systems Global Technology | HV system for a mono-polar CT tube |
| US7242137B2 (en) * | 2004-09-30 | 2007-07-10 | Matsushita Toshiba Picture Display Co., Ltd. | Cathode ray tube with cone having non-circular cross-section |
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