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WO2010077183A1 - Connexion à contact électrique amovible et procédé de traitement correspondant - Google Patents

Connexion à contact électrique amovible et procédé de traitement correspondant Download PDF

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Publication number
WO2010077183A1
WO2010077183A1 PCT/RU2009/000738 RU2009000738W WO2010077183A1 WO 2010077183 A1 WO2010077183 A1 WO 2010077183A1 RU 2009000738 W RU2009000738 W RU 2009000738W WO 2010077183 A1 WO2010077183 A1 WO 2010077183A1
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WO
WIPO (PCT)
Prior art keywords
contact
gallium
alloy
flux
metal coating
Prior art date
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Ceased
Application number
PCT/RU2009/000738
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English (en)
Russian (ru)
Inventor
Владимир Александрович РЯБОВ
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Individual
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Individual
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Filing date
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Priority claimed from RU2009100939/02A external-priority patent/RU2411305C2/ru
Application filed by Individual filed Critical Individual
Publication of WO2010077183A1 publication Critical patent/WO2010077183A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C28/00—Alloys based on a metal not provided for in groups C22C5/00 - C22C27/00
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/304—Clamped connections, spring connections utilising a screw or nut clamping member having means for improving contact
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/34—Conductive members located under head of screw
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/03—Contact members characterised by the material, e.g. plating, or coating materials

Definitions

  • the invention relates to the field of electrical engineering and can be used in the manufacture of electrical equipment used in all existing industrial facilities, one of the main elements of which are collapsible electrical contact connections (REKS), including contact details.
  • REKS collapsible electrical contact connections
  • This group of inventions can be used in the processing of current-carrying contact surfaces of contact parts used in the manufacture of a collapsible electrical contact connection (REKS) containing two or more of these contact parts.
  • REKS collapsible electrical contact connection
  • a conditional contact area is formed, which is determined by the part of the working surface on which contact occurs contact parts and the effective contact area over which electric current passes from one contact part to another. Moreover, the effective contact area is only part of the conditional contact area. The discrepancy between the effective contact area and the conditional contact area in the REKS is the result of incomplete contact of the contact surfaces of the contact parts.
  • Collapsible electrical contact joints are known in which the conductive surfaces of the contact parts are coated with an alloy based on tin or silver or nickel, etc., but the deposition technology is expensive and is applicable only in a stationary production environment.
  • the alloy with the specified composition of the components limits the ability to control the properties of the alloy, such as mechanical hardness, corrosion resistance, electrical conductivity.
  • the closest analogue adopted for the prototype in relation to the device is a collapsible contact connecting device, in which the reduction of the transient electrical resistance is achieved by coating the current-carrying surfaces of the contact parts, namely a coating based on a gallium alloy with a thickness of at least 15 ⁇ m, which prevents the formation of surfaces of contact parts of oxide and sulfide films having high electrical resistivity (RU patent for utility model JVb 8530, op. 16.11.1998).
  • This technical solution is aimed at reducing and stabilizing the transient electrical resistance, but does not solve the problem of increasing the effective contact area.
  • the low percentage of gallium in the alloy gives an increase in the electrical resistivity of the layer formed by this alloy, which increases the transient electrical resistance of the joint as a whole and reduces the reliability of the contact joint and worsens its operational parameters.
  • the main method of assembling REKS is a bolted connection.
  • the effective contact area is the contact surface in the area of the bolt head (area of the thrust washer).
  • the remaining contact surface as a result of the relative surface roughness, low rigidity of the connecting structure has an incomplete fit of the contact surfaces and, as a result, has an increased transient electrical resistance already at the time of assembly, which increases during the period of operation as a result of access of the oxidizing medium.
  • the effective contact area operates in high load mode during current transmission, as it is less than the conventional contact area.
  • the increase in transient electrical resistance as a result of oxidation processes on the contact surface of the compound and the increased load during current transmission lead to instability of the modes of electrical consumers, exceeding the temperature conditions of the electrical installation as a whole and loss of electricity.
  • a method of treating contact surfaces of a collapsible electrical contact connector in which a reduction in transient electric resistance is achieved by applying a special coating to the current-carrying surfaces of contact parts, namely, applying a gallium alloy with a coating thickness of at least 15 microns, which prevents the formation of contact parts oxide and sulfide films having a high electrical resistivity.
  • This technical solution is aimed at reducing and stabilizing the transient electrical resistance, but does not solve the problem of increasing the effective contact area.
  • the closest analogue adopted for the prototype in relation to the method is a method of treating contact surfaces of a collapsible electrical contact connection, including cleaning the contact surfaces from an oxide film using flux, heating the contact surface, mechanically cleaning and applying a metal coating on it, while heating is carried out to temperature 40-45 ° C, the deposition of a metal coating is carried out using local contact melting, and a layer of g is applied as a metal coating llievogo alloy having a melting temperature not above 30 ° C, not more than 0.1 mm thick (patent RU N ° 2,301,847, op. 27.06.2007).
  • the disadvantages of the method include the following: 1.
  • the flux solution is applied once, and then heating and mechanical cleaning take place.
  • the amount of flux on the contact surface is minimal, since the flux is removed during mechanical cleaning and partially evaporates when the surface is heated.
  • To treat the contact surface especially if we take into account the duration of the entire time period of the deposition of the alloy, to obtain maximum wettability of the contact surface, a constant presence on the surface of the flux during the entire time of deposition of the alloy is necessary.
  • the flux removes the oxide film from the contact surface and prevents it from forming over the entire period of treatment of the contact surface. In the prototype, this condition is not satisfied.
  • the contact surface is not neutralized from the remainder of the flux and even with a very small amount on the contact surface, the etching process continues, which destroys the contact surface.
  • the application of the alloy on the contact surface with a thickness of not more than 0.1 mm does not allow to form a layer capable of improving and increasing the effective contact area, since in practice the layer of the specified thickness completely diffuses into the contact surface and does not allow to increase the effective contact area.
  • Alloy with the specified composition of the components limits the possibility of: regulating the melting temperature of the alloy, and, therefore, limits the possibility of regulating the temperature of the technological process of processing the contact surface; - regulation of the properties of the alloy, such as mechanical hardness, corrosion resistance, electrical conductivity.
  • the problem to which this invention is directed is to create a reliable, efficient in operation collapsible electrical connection, improve the quality of preparation of the contact surface and increase the load capacity of a collapsible electrical contact connection by increasing its effective contact surface, while ensuring the stability of the characteristics of the transient electrical resistance in the process operation.
  • the metal coating is made of an alloy of the following composition: gallium - 64 ⁇ 99, 9999, indium - 0.001 + 35, tin - 0.001 ⁇ 28, silver - 0.001 ⁇ 7.5, cadmium - 0.001 ⁇ 5, zinc - 0.001 + 5, copper -0.0001 ⁇ S, aluminum - 0.000 l ⁇ l 2 this metal coating is made with a thickness of 0.1-0.5 mm.
  • Contact details can be made of copper and its alloys, steel and its alloys, cobalt, silver, tin, lead, aluminum, grades AO ⁇ ADZ IT and its alloys.
  • the task in terms of the method is solved by the fact that in the method of processing current-carrying contact surfaces of contact parts of a collapsible electrical contact connection, including processing current-carrying contact surfaces of contact parts in order to remove an oxide film by applying a liquid flux to these surfaces, heating the current-carrying contact surfaces of contact details their mechanical cleaning, applying a metal coating, which is used as a gallium-based alloy, according to the invention, initially carry out chemical treatment - etching of the contact surfaces with a first flux solution, followed by its neutralization and cleaning of the contact surfaces from the results of chemical treatment - etching, then carry out mechanical cleaning of the indicated contact surfaces by grinding, after which they are heated and metal coated gallium-based alloy in the environment of the second flux solution, after the deposition of the metal coating, the flux residues are neutralized to stop the etching process.
  • composition of the metal coating alloy is as follows, May,%: gallium -64 ⁇ 99.9999, indium - 0.001 ⁇ 35, tin - 0.001 ⁇ 28, silver - 0.001 ⁇ 7.5, cadmium - 0.001 ⁇ 5, zinc - 0.001 ⁇ 25, copper - 0.0001 ⁇ 10, aluminum - 0.0001 ⁇ 12
  • the metal coating is applied with a layer thickness of 0.1-0.5 mm.
  • the contact surface is heated between 10-70 ° C.
  • the first flux solution is prepared on the basis of hydrochloric acid with a concentration of 5-35% or on the basis of alkali with a concentration of 5-18%.
  • As the second flux a solution similar to the first flux solution with a concentration of 1.5-2.5 times lower than the concentration of the first flux solution is used.
  • the melting temperature of the metal coating of the gallium alloy is 9.0-30.8 ° C.
  • the drawing shows a collapsible contact electrical connection containing contact parts 1, 2, the current-transmitting surfaces of which contain a coating containing a saturated layer of alloy 3 and layers 4, 5, diffused , respectively, in the contact parts 1 and 2.
  • the coating is made of an alloy based on gallium of the following composition: gallium - 64 ⁇ 99.9999, indium - 0.001 ⁇ 35, tin - 0.001 ⁇ 28, silver - 0.001 ⁇ 7.5, cadmium - 0.001 ⁇ 5, zinc - 0.001 ⁇ 25, copper -0.0001 ⁇ S, aluminum - 0,000 l ⁇ l 2.
  • the coating is made with a thickness of 0.1-0.5 mm. Due to the deposition of a layer with a thickness of more than 0.1 mm in the claimed technical solution, a layer diffused into the contact surface up to 20 ⁇ m and a saturated alloy layer on the contact surface itself are obtained, with which the effective contact area is increased during assembly of the contact joint.
  • Contact - parts can be made of copper and its alloys, steel and its alloys, cobalt, silver, tin, lead, aluminum, preferably AO ⁇ ADZ IT grades and its alloys and can be interconnected by a fastening element 6, for example, bolted connection.
  • contact surfaces copper-copper, copper-aluminum, aluminum-aluminum.
  • the coating represents a new intermetallic layer formed by gallium alloy and contact surface material.
  • the use of a coating thickness of the contact surface of less than 0.1 mm reduces the quality of the coating and, accordingly, the reliability of the connection, by increasing the transient electrical resistivity.
  • the processing method is as follows. Initially, chemical treatment is carried out - etching of the contact surfaces with the first flux solution to clean the contact surfaces from oxide films.
  • the first flux solution can be prepared on the basis of hydrochloric acid with a concentration of 5-35% with possible adjustment by zinc, iron in an aqueous medium, for example, a saturated solution of zinc chloride for contact surfaces based on copper and its alloys, steel and its alloys, cobalt, silver, tin, lead.
  • Contact surfaces based on aluminum and its alloys are treated with the first alkali-based flux solution - NaOH in an aqueous solution with a concentration of 5-18%.
  • the first flux solution is neutralized by wiping with a cotton swab moistened with a neutralization solution and the contact surfaces are cleaned of the results of etching with a dry cotton swab.
  • the neutralization of the first flux residues is carried out depending on the type of flux: acid flux is neutralized, for example, with a solution of 5% bicarbonate of soda, alkaline flux is neutralized, for example, with a solution of 8% acetic acid.
  • the contact surface is heated at temperatures of 10-70 ° C, while the contact surfaces made of copper and its alloys, steel and its alloys, cobalt, silver, tin, and lead are heated at –10–7 ° C, and the contact is heated surfaces made of aluminum and its alloys - within 10-52 ° C.
  • a solution of the second flux is applied with the simultaneous application of a metal coating with a gallium alloy with a thickness of 0.1-0.5 mm without leaving the temperature range of 10-70 ° C.
  • Application of the second flux immediately after heating the contact surface allows you to protect the contact surface from oxidative processes and increase the wettability of the applied alloy.
  • the second flux a solution similar to the first flux solution with a concentration of 1.5-2.5 times lower than the concentration of the first flux solution is used.
  • the deposition of the alloy is carried out by local contact melting of the contact surface, a gallium alloy having a melting point of 9.0 ⁇ 30.8 ° C is used as the alloy.
  • the composition of the applied metal coating - gallium-based alloy is as follows: Gallium - 64 ⁇ 99.9999, Indium - 0.001 ⁇ 35, Tin - 0.001 ⁇ 28, Silver - 0.001 ⁇ 7.5, Cadmium - 0.001 ⁇ 5, Zinc - 0.001 ⁇ 25 , Copper - 0.0001 ⁇ S, Aluminum - 0.000 l ⁇ l 2.
  • the electrical contact joint is assembled, for example, by means of a bolted joint, excess gallium alloy squeezed out of the contact surface after tightening the bolted joint is removed.
  • the flux residues are neutralized with a neutralization solution and, if necessary, washed with water.
  • the mechanical and chemical treatment of the contact surface ensures good wettability of the contact surfaces; an equilibrium state of the surface tension forces of the gallium alloy liquid layer on the solid surface of the contact material is created.
  • the contact material within the treated surface is a new intermetallic layer formed by a gallium alloy and the material of the contact surface.
  • the wetting angle of the liquid gallium alloy is 65-91.0 ° with a bond strength of 27-29 MPa with a contact surface with a thickness of the liquid gallium alloy of 0.1-0.5 mm.
  • the given thickness of the liquid layer of gallium alloy provides alignment of the contact surface and increases the effective contact area of REKS, and taking into account the properties of gallium alloys, minimizes and stabilizes the electrical transient resistance in the contact connection.
  • a wide range of liquid state of gallium alloy (about 9-
  • This method is applicable for connecting the following types of contact surfaces: copper-copper, copper-aluminum, aluminum-aluminum.
  • Example 1 A method of processing the contact surfaces of a collapsible electrical connection copper - copper.
  • a cotton swab dipped in the first flux solution (20% hydrochloric acid solution adjusted by zinc to a saturation state) is wiped on the contact surface to remove contamination and oxide film. After thorough cleaning of the surface, it is wiped with a swab moistened in a solution for neutralization (5% solution of bicarbonate of soda) and wiped dry. With a stainless steel soft brush to grind the metal surface, the contact surface is cleaned with a grinder, after cleaning, the metal dust residues are removed - the result of grinding. Hair dryer or the infrared heat source heats the contact surface to a temperature of 35 ° C. Temperature control is carried out by any device with a measurement accuracy of ⁇ 0.5 ° C.
  • the alloy layer on the contact surface should have a saturated (moistened) appearance of a brilliant (mirror) color.
  • the contact surfaces are connected, the bolts are tightened with force according to the technical conditions.
  • the remaining gallium alloy extruded from the contact surface is removed with a swab.
  • the collected contact compound is treated with a swab dipped in a solution to neutralize the flux of a 5% solution of bicarbonate of soda, if necessary, washed with water and wiped dry.
  • the alloy composition for the indicated temperature conditions gallium - 67%, indium - 22%, tin - 5%, silver - 1.5%, cadmium - 0.5%, zinc - 4%, copper - 0, 0001%, aluminum - 0, 0001%
  • the melting point of the alloy is 12.5 ° C.
  • Example 2 A method of processing contact surfaces of a collapsible electrical connection aluminum - aluminum. Cotton swab dipped in the first flux solution -
  • the alloy layer on the contact surface should have a saturated (moistened) appearance of a brilliant (mirror) color.
  • the contact surfaces are connected, the bolts are tightened with force according to the technical conditions.
  • the remaining gallium alloy extruded from the contact surface is removed with a swab.
  • the collected contact compound is treated with a swab dipped in a solution to neutralize the flux -6% solution of acetic acid, and wiped dry.
  • the alloy composition for the indicated temperature regimes gallium - 80%, indium - 10%, tin - 5%, silver - 0.5%, cadmium - 1.5%, zinc - 3%, copper - 0, 0001%, aluminum - 0, 0001%
  • the melting point of the alloy is 17.5 "C. Up to 0.05% of intermetallic compounds may be present in the alloy due to impurities contained in the components.
  • a collapsible electrical contact connection can be processed by the claimed method, the conductive contact surface of at least one of the contact parts.
  • the analysis of theoretical and experimental data on the use of one to eight component gallium alloys in the processing of REKS contact surfaces allowed us to create a universal method for processing REKS contact surfaces, taking into account the features of the treated contact surfaces and determining the method of pretreatment, the choice of alloy and the procedure for applying it.
  • the processing method includes a list of preparatory operations for mechanical and chemical treatments, temperature conditions, the composition of the gallium alloy.
  • this method can be used to solve such problems as reducing and stabilizing the transient electrical resistance of a contact joint, as well as increasing the effective contact area.
  • This method allows to increase by 5-15% the load capacity of REKS when transmitting electrical energy without changing the design of the contact connection, while the temperature regime does not exceed the permissible limits. This is confirmed by the results of experimental and experimental studies.
  • the technical result of the group of inventions is to create a reliable operation of a collapsible electrical contact connection, by ensuring the stability of the transitional electrical resistance for a period commensurate with the life of the electrical equipment as a whole.
  • the inventive combination of features can minimize the loss of electrical energy in contact electrical connections, as well as improve the quality and efficiency of its transmission.
  • the claimed group of inventions can be used in the field of electrical engineering in the manufacture of electrical equipment used in all existing industrial facilities, one of the main elements of which are collapsible electrical contact joints (REKS), including contact parts, namely when processing current-carrying contact surfaces of these contact parts used in the manufacture of a collapsible electrical contact connection (REKS) containing two or more of these contacts t-parts.
  • REKS collapsible electrical contact joints
  • REKS collapsible electrical contact joints

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Contacts (AREA)

Abstract

L'invention se rapporte au domaine de l'électronique et peut être utilisée dans un équipement électrotechnique. La connexion à contact électrique amovible comprend des pièces de contact dont les surfaces électroconductrices comportent un revêtement fait d'un alliage de gallium ayant la composition suivante, en % en poids : gallium - 64 ÷ 99,9999, indium - 0,001 ÷ 35, étain - 0,001 ÷ 28, argent - 0,001÷ 7,5, cadmium - 0,001÷ 5, zinc - 0,001÷ 25, cuivre -0,0001÷ 10, aluminium - 0,0001÷12. Le procédé de traitement des surfaces de contact consiste à attaquer les surfaces de contact afin d'éliminer la pellicule oxyde par une première solution de morsure, puis à neutraliser et nettoyer les surfaces de contact des résidus de l'attaque, après quoi on effectue un nettoyage mécanique des surfaces de contact par meulage, on chauffe les surfaces de contact à 10 à 70°C et on applique un revêtement métallique en alliage de gallium dans un milieu de seconde solution de morsure dont les résidus sont neutralisés après la fin du processus d'attaque.La présente invention permet de produire une connexion à contact électrique amovible fiable lors de son exploitation du fait de la stabilité de la valeur de la résistance électrique transitoire pendant une durée commensurable à la durée d'exploitation de l'équipement électrique dans son ensemble.
PCT/RU2009/000738 2008-12-30 2009-12-28 Connexion à contact électrique amovible et procédé de traitement correspondant Ceased WO2010077183A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
RU2009100939/02A RU2411305C2 (ru) 2008-12-30 2008-12-30 Способ обработки контактных поверхностей разборного электрического контактного соединения
RU2009100939 2008-12-30
RU2009100909 2008-12-30
RU2009100909 2008-12-30

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WO2010077183A1 true WO2010077183A1 (fr) 2010-07-08

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107645074A (zh) * 2016-07-21 2018-01-30 通用电气公司 用于电气接头的热冷却接口

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1527980A (en) * 1974-09-25 1978-10-11 Johnson Matthey Co Ltd Electrical connector
SU825288A1 (ru) * 1979-01-22 1981-04-30 Предприятие П/Я В-8495 УСТРОЙСТВО ДЛЯ ПОДВОДА ТОКАК ВРАЩАЮЩЕМУСЯ ЭЛЕКТРОДУ СВАРОЧНОЙ МАШИНЫ1Изобретение относитс к сварочной технике и может быть использовано в токоподводах роликовых сварочных машин.Известны устройства дл передачи электрического тока от неподвижных частей к вращаю'димс с помощью жидкого металла, например ртути, увеличение срока службы которых осуществл етс применением жидкостного охлаждени сварочньис роликов Г1] .Использование такого высокотоксичного материала, как ртуть, и жидкостного охлаждени непосредственно ролика значительно усложн ет конструкцию устройства и не снижает температуры нагрева жидкостного контакта, завис щей от переходного сопротивлени между поверхност ми жидкого и твердого металлов.Известно устройство да подвода тока к вращающемус электроду сварочной машины, содержащее корпус, подшипники, шпиндель, уплотнение, токо- подвод щую вставку, полость которой заполнена жидкостным контактом из тройного жидкого сплава металлов галли , инди и опова L2J.Используеи«й в качестве^ жидкост- -ного контакта тройной сплав не токси-1015202530чен, но в результате отсутстви химического взаимодействи его с контактными поверхност ми шпиндел и токопро- вод щей вставки (не смачивает их) переходные контакты твердый металп - жидкий сплав обладают высоким омическим сопротивлением, результатом чего вл етс потер мощности и повышенный нагр.ев устройства при прохождении сварочного тока. Следствием повышенного нагрева вл етс также разрушение уплотнени , обеспечивающего герметичность полости с жидким сплавом, и выход устройства из стро .Цель изобретени - уменьшение потерь мощности сварочного тока и уйе- личение срока службы устройства.Указанна цель достигаетс тем, что поверхности шпиндел и токоподво- д щей вставки, соприкасаквдиес с жидкостным контактом, выполнены с подслоем из меди, покрытым одним из :металлов,вход щих в состав тройного сплава.На чертеже изображено устройство дл ' подвода тока к вращающемус электроду сварочной машины, общий вид.Устройство содержит корпус 1, шпиндель 2 с укрепленным на нем сва рочным роликом 3, подшипники 4 и 5,
JPH05326098A (ja) * 1992-05-19 1993-12-10 Fujitsu Ltd 端子の電気的接続方法
RU8529U1 (ru) * 1998-02-16 1998-11-16 Институт теплофизики Уральского отделения РАН Разборное контактное соединительное устройство
RU2301847C1 (ru) * 2005-12-01 2007-06-27 Григорий Наумович Перельштейн Способ нанесения металлического покрытия на токопередающие поверхности разборных контактных соединений

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1527980A (en) * 1974-09-25 1978-10-11 Johnson Matthey Co Ltd Electrical connector
SU825288A1 (ru) * 1979-01-22 1981-04-30 Предприятие П/Я В-8495 УСТРОЙСТВО ДЛЯ ПОДВОДА ТОКАК ВРАЩАЮЩЕМУСЯ ЭЛЕКТРОДУ СВАРОЧНОЙ МАШИНЫ1Изобретение относитс к сварочной технике и может быть использовано в токоподводах роликовых сварочных машин.Известны устройства дл передачи электрического тока от неподвижных частей к вращаю'димс с помощью жидкого металла, например ртути, увеличение срока службы которых осуществл етс применением жидкостного охлаждени сварочньис роликов Г1] .Использование такого высокотоксичного материала, как ртуть, и жидкостного охлаждени непосредственно ролика значительно усложн ет конструкцию устройства и не снижает температуры нагрева жидкостного контакта, завис щей от переходного сопротивлени между поверхност ми жидкого и твердого металлов.Известно устройство да подвода тока к вращающемус электроду сварочной машины, содержащее корпус, подшипники, шпиндель, уплотнение, токо- подвод щую вставку, полость которой заполнена жидкостным контактом из тройного жидкого сплава металлов галли , инди и опова L2J.Используеи«й в качестве^ жидкост- -ного контакта тройной сплав не токси-1015202530чен, но в результате отсутстви химического взаимодействи его с контактными поверхност ми шпиндел и токопро- вод щей вставки (не смачивает их) переходные контакты твердый металп - жидкий сплав обладают высоким омическим сопротивлением, результатом чего вл етс потер мощности и повышенный нагр.ев устройства при прохождении сварочного тока. Следствием повышенного нагрева вл етс также разрушение уплотнени , обеспечивающего герметичность полости с жидким сплавом, и выход устройства из стро .Цель изобретени - уменьшение потерь мощности сварочного тока и уйе- личение срока службы устройства.Указанна цель достигаетс тем, что поверхности шпиндел и токоподво- д щей вставки, соприкасаквдиес с жидкостным контактом, выполнены с подслоем из меди, покрытым одним из :металлов,вход щих в состав тройного сплава.На чертеже изображено устройство дл ' подвода тока к вращающемус электроду сварочной машины, общий вид.Устройство содержит корпус 1, шпиндель 2 с укрепленным на нем сва рочным роликом 3, подшипники 4 и 5,
JPH05326098A (ja) * 1992-05-19 1993-12-10 Fujitsu Ltd 端子の電気的接続方法
RU8529U1 (ru) * 1998-02-16 1998-11-16 Институт теплофизики Уральского отделения РАН Разборное контактное соединительное устройство
RU2301847C1 (ru) * 2005-12-01 2007-06-27 Григорий Наумович Перельштейн Способ нанесения металлического покрытия на токопередающие поверхности разборных контактных соединений

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107645074A (zh) * 2016-07-21 2018-01-30 通用电气公司 用于电气接头的热冷却接口

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