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WO1991009702A1 - Plasmatron - Google Patents

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Publication number
WO1991009702A1
WO1991009702A1 PCT/SU1989/000338 SU8900338W WO9109702A1 WO 1991009702 A1 WO1991009702 A1 WO 1991009702A1 SU 8900338 W SU8900338 W SU 8900338W WO 9109702 A1 WO9109702 A1 WO 9109702A1
Authority
WO
WIPO (PCT)
Prior art keywords
plasma
gas
diameter
channels
outlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/SU1989/000338
Other languages
English (en)
Russian (ru)
Inventor
David Grigorievich Bykhovsky
Vadim Vasilievich Volchkov
Mikhail Valentinovich Karasev
Nikolai Alexandrovich Kelin
Valery Stepanovich Klubnikin
Alexandr Yakovlevich Medvedev
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Leningradsky Politekhnichesky Institut
Original Assignee
Leningradsky Politekhnichesky Institut
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Leningradsky Politekhnichesky Institut filed Critical Leningradsky Politekhnichesky Institut
Priority to PCT/SU1989/000338 priority Critical patent/WO1991009702A1/fr
Priority to EP19900905345 priority patent/EP0461259A4/en
Publication of WO1991009702A1 publication Critical patent/WO1991009702A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc
    • H05H1/34—Details, e.g. electrodes, nozzles
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc
    • H05H1/34—Details, e.g. electrodes, nozzles
    • H05H1/3405—Arrangements for stabilising or constricting the arc, e.g. by an additional gas flow
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc
    • H05H1/34—Details, e.g. electrodes, nozzles
    • H05H1/3442—Cathodes with inserted tip
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc
    • H05H1/34—Details, e.g. electrodes, nozzles
    • H05H1/3468—Vortex generators
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc
    • H05H1/34—Details, e.g. electrodes, nozzles
    • H05H1/3478—Geometrical details

Definitions

  • Plasma is known ("Gas sales from media", Comp., U.S. Borussiv and Drudy, 1987, April 6) Plasma-generating gas is delivered tangentially to the cathodic region of the electric arc, and sprayed gas is supplied to the conventional
  • the tangential discharge of plasma gas into the plasma is used to increase the service life of the electrodes in the case when the chemical gas is chemical (hazardous).
  • the chemical gas is chemical (hazardous).
  • Plasma is known (3, 430801), and on the other hand an inter-elec- tric set was installed on the cathode and anode. In this case, due to the increase in the length of the electric arc, a slight decrease in the tangential component is achieved.
  • the discharge channels to the plasma discharge are also carried out in a simple anode, and in this case the output channels of the exhaust gas are removed from the exhaust When burning electricity
  • the sprayed material must first be released through this “dry” area, therefore there is no waste of gas This, in turn, can be done to cool the plasma jet and to reduce the coefficient of use of sprayed materials and to improve the quality of the product.
  • the basic task of the invention is to create a plasma
  • 25 is small, ⁇ es ⁇ its ⁇ n ⁇ si ⁇ elny ⁇ azme ⁇ b ⁇ lshe than 1.7, ⁇ ⁇ a- ⁇ aya length vs ⁇ av ⁇ i ⁇ azyvae ⁇ sya ned ⁇ s ⁇ a ⁇ chn ⁇ y for ⁇ susches ⁇ vle- Nia ⁇ u ⁇ bulen ⁇ n ⁇ g ⁇ ⁇ e ⁇ emeshivaniya ⁇ yam ⁇ s ⁇ uyn ⁇ g ⁇ ⁇ echeniya gas and vi ⁇ ev ⁇ g ⁇ ⁇ echeniya ⁇ lazmy on uchas ⁇ e dug ⁇ v ⁇ g ⁇ ⁇ anala, ⁇ g ⁇ a- nichenn ⁇ m mezhele ⁇ dn ⁇ y vs ⁇ av ⁇ y and ⁇ a ⁇ zhe for vy ⁇ avnivaniya
  • the intrinsic output diameter of the unit must be no less than the external diameter of the unit, the written out exhaust gas is extra long,
  • FIG. 2 shows a schematic of the proposed plasmas in a separate section
  • Plasma set to pipe 7 for the delivery of bulk material to the plasma.
  • Channels 6 are divided equally, as well as an interesting arc channel 5, as can be seen from FIG. 2. Large gas channels 6 and their diameters are chosen so that 25, the total area and the cross-sections were not avoided.
  • the internal diameter of the interelectrical unit 3 is not the same as the diameter of the external unit 8, the written output is 30% E ⁇ usl ⁇ vie ne ⁇ b ⁇ dim ⁇ for ⁇ g ⁇ , ch ⁇ by ⁇ i gas to vy ⁇ de of d ⁇ lni ⁇ elny ⁇ ⁇ anal ⁇ v 6 is not running over the ⁇ tsevzgyu ⁇ ve ⁇ n ⁇ s ⁇ mezhele ⁇ dn ⁇ y vs ⁇ av- ⁇ i 3 and is ⁇ e ⁇ ali vd ⁇ l its s ⁇ en ⁇ i ⁇ ⁇ echeniyu ⁇ lazmy in du ⁇ v ⁇ m 35 ⁇ anale 5 ch ⁇ ⁇ bes ⁇ echivae ⁇ s ⁇ abiln ⁇ s ⁇ ⁇ ab ⁇ y ⁇ lazm ⁇ na.
  • the diameter of the housing is 8 and the length of the interconnection 3 is in the range from 0.6 to 1.7. The best range for the b / w ratio is divided by the capacity ⁇
  • the plasma on the other hand, is, in its turn, divided by the required production process of the plasma processing.
  • a change in size that is, the size of the plasma is 5 and more.
  • Plasma works as follows. Primary
  • a plasma zone in which there is a plasma structure 15, - 8 - having a uniform temperature and rapid displacement.
  • step 7 in plasma, just 15 feeds the plasma for plasma processing.
  • P ⁇ i e ⁇ m ⁇ sh ⁇ vv ⁇ di ⁇ sya ⁇ a ⁇ iches ⁇ i s ⁇ azu 5 vys ⁇ em ⁇ e ⁇ a ⁇ u ⁇ nuyu ⁇ blas ⁇ ⁇ lazmenn ⁇ y s ⁇ ui in ⁇ lichie ⁇ ⁇ lazm ⁇ na s ⁇ glasn ⁇ ⁇ , ⁇ , 2600229.
  • EXAMPLE I 15 A coating was produced on a commercial base with an average particle size of 28 ⁇ m.
  • the diameter of the outlet, the written-out type of the outlet for the additional gas channels, was 10 mm.
  • the internal diameter of the interconnection was 10 mm, and its length b was 6.2 mm, that is, the ratio of 20 b / w was equal to 1.612, which lies in the range 0.6 ... 1.7.
  • the flow rate was maintained at an equal of 200 ⁇ , the discharge of plasma-forming gas (exit) was 0.8 g / sec.
  • the voltage on the unit was 150 ⁇ .
  • EXAMPLE 2 Dust spraying of a dust was produced by a similar process to the I operating mode and the operating pressure of 30. The difference was that the length of the interconnect was 5.8 mm, that is, the ratio of b / w was 1.724, which lies outside the range of 0.6 ... 1.7.
  • the following indicators of the spraying process are used: yield 0.9 kg / hour, coefficient of use 0.25, adhesive 35 release rate, 15%. These indicators are significantly lower than in Example I.
  • the plasma does not eliminate all the possible variants of the invention. ⁇ Particularly, in the proposed plasma, additional gas channels can be autonomous, because there is no gas to be supplied
  • FIG. ⁇ there is a simple source.
  • the composition of the plasma-gas may be different.
  • additional gas channels it may not be parallel with the other channels, but you must be at a corner to it, and the additional channels themselves may be available.
  • the intentional use of the invention may be used for spraying particles, spheridizing particles, surfacing, etc., for use in applications

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Geometry (AREA)
  • Plasma Technology (AREA)
  • Nozzles (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

Dans un plasmatron, entre les électrodes (1, 4), sont montés une buse d'admission (2) et un élément rapporté d'inter-électrodes (3). La buse (2) est munie de canaux de gaz supplémentaires (6) reliés au canal de formation d'arc (5). Le diamètre interne de l'élément rapporté d'inter-électrodes (3) n'est pas inférieur au diamètre d'une circonférence (8) circonscrite autour de l'ouverture de sortie des canaux supplémentaires (6). Le rapport entre le diamètre de cette circonférence (8) et la longueur de l'élément rapporté (3) se situe entre 0,6 et 1,7. Avec une alimentation tangentielle du gaz générateur de plasma (9), un jet axial de plasma non refroidi (15), aux courbes de température et de vitesse (14) uniformes, se forme derrière l'anode (4).
PCT/SU1989/000338 1989-12-26 1989-12-26 Plasmatron Ceased WO1991009702A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/SU1989/000338 WO1991009702A1 (fr) 1989-12-26 1989-12-26 Plasmatron
EP19900905345 EP0461259A4 (en) 1989-12-26 1989-12-26 Plasmatron

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SU1989/000338 WO1991009702A1 (fr) 1989-12-26 1989-12-26 Plasmatron

Publications (1)

Publication Number Publication Date
WO1991009702A1 true WO1991009702A1 (fr) 1991-07-11

Family

ID=21617623

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SU1989/000338 Ceased WO1991009702A1 (fr) 1989-12-26 1989-12-26 Plasmatron

Country Status (2)

Country Link
EP (1) EP0461259A4 (fr)
WO (1) WO1991009702A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4445021A (en) * 1981-08-14 1984-04-24 Metco, Inc. Heavy duty plasma spray gun
US4788402A (en) * 1987-03-11 1988-11-29 Browning James A High power extended arc plasma spray method and apparatus
US4841114A (en) * 1987-03-11 1989-06-20 Browning James A High-velocity controlled-temperature plasma spray method and apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4035684A (en) * 1976-02-23 1977-07-12 Ustav Pro Vyzkum, Vyrobu A Vyuziti Radiosotopu Stabilized plasmatron
FR2600229B1 (fr) * 1986-06-17 1994-09-09 Metallisation Ind Ste Nle Torche de rechargement a plasma

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4445021A (en) * 1981-08-14 1984-04-24 Metco, Inc. Heavy duty plasma spray gun
US4788402A (en) * 1987-03-11 1988-11-29 Browning James A High power extended arc plasma spray method and apparatus
US4841114A (en) * 1987-03-11 1989-06-20 Browning James A High-velocity controlled-temperature plasma spray method and apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0461259A4 *

Also Published As

Publication number Publication date
EP0461259A4 (en) 1992-12-30
EP0461259A1 (fr) 1991-12-18

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