Sealed heat-resistant electrical connector

 

The invention relates to energy, in particular, to electrical switching apparatus, and can be used in power plants operating in vacuum conditions, at elevated temperatures and providing a sealed connection, operating at temperatures up to 800With high mechanical loads. The technical result - improving the manufacturability and reliability of the electrical connector when the extended range of the used materials. The connector comprises a sealed plug and unpressurized outlet, each of which consists of a housing, an insulator and located in the holes of the insulator metal contacts, with sealed plug contains metal cuffs that are located between the surfaces of the pins and insulating and hermetically United with them. Each node of the sealing plug and cuff located outside the installation of the insulator on the side opposite to the location of the outlet, and contains additional sleeve covering the pin contact and the end part of the cuff, having a conical shape. 1 Il.

The invention relates to power engineers, working under vacuum conditions, at elevated temperatures and providing a sealed connection, operating at temperatures up to 800With high mechanical loads, with multiple joints and unsoldering in these conditions.

Most of the known connectors is characterized manual articulation and division of two mandatory parts of the connector plugs and sockets, as well as performance under normal operating and climatic conditions. Some connectors have been developed for special operating conditions, in particular for diagnostics of high-temperature aircraft engines, nuclear and other power plants, for dockable space objects where necessary as heat-resistant performance, and the ability of articulation and dismemberment automatically and repeatedly.

Known design sealed connector, protected by U.S. patent No. 3685005, MKI H 01 R 13/40, publ. 1972, in which the outer shell is made of light alloy surrounds the copper contacts passing through the glass insulator is fixed inside the shell. Shell, insulator and contacts possess coefficients of linear the cross connection. This and numerous varieties of such hermetic connectors are made, in main part, same design scheme, which includes the body placed in it, plug, socket, connected with cables. These designs are in continuous operation and have proven themselves on the good side, because when selecting materials with loved ones, Ltram design works reliably at elevated temperatures, where the difference cltr still no effect and does not cause stress, leading to damage or leakage.

The design allows, in accordance with the terms of the combination of cltr materials, to ensure the tightness, but the range of materials, cltr which combines at high temperatures, small, additionally, the level of stress in these structures increases with increasing temperature, because the full match cltr to achieve the almost impossible. Therefore, the operation of such connectors is possible in a limited range of temperatures and loads.

However, further development of technology has led to the tightening operation of devices that use electrical connectors, allowing the power supply apparatus. Weerasak, that, in turn, resulted in a tightening of the requirements to the design of electrical connectors.

The weak link in such constructions is the area of the connection cables with pins and tight connection of dissimilar materials, because virtually impossible selection of materials with coefficients of linear thermal expansion, allowing it to operate at high operating temperatures, multiple heating - cooling cycles. In addition, it is important to protect elements of the connector of the materials from which they are composed, and technological compatibility of the created protection with the structural elements of the connector and its production technologies. Failure to observe the above conditions leads to failure of the whole structure under extreme conditions.

Known design gastight plug electrical connector, secure and.with. The USSR №1508303, MKI H 01 R 13/52, publ. 1989 Plug consists of a body, glass insulator, glass pins from Kovar, according to the invention in a plug introduced an additional sealing insulator, reinforced metal inputs, and flexible conductors connecting pairs corresponding stria allows you to save the integrity of the fork when multiple joints and unsoldering, however, the case covering both insulator, General and with a considerable increase in the operating temperature difference values cltr of materials and insulators will lead to significant stresses in the body of the insulator, which would reduce the reliability of the design when power loads, for example, when the difference of pressures on the side of the plug and socket. Sealing is carried out when implementing high-temperature processes, which leads to disruption of the protective properties of coatings on pins and for hardening the surface of the pins with the surface of the metal cuffs that are installed in the slots of the socket, welding them to the surface of the socket outlet. This makes it difficult to dismantle or dismemberment of the plug and socket, and the connector becomes unsuitable for re-use.

The closest technical solution to the claimed invention is an electrical connector that is protected but.with. The USSR №1693670, MKI H 01 R 13/52, publ. 1991, selected as a prototype.

The connector consists of a sealed plug and leaking sockets, each of which consists of a housing, an insulator and located in the hole of the insulator, the metal contacts, both of the case is made from elektroizoljatsionnye between the surfaces of pins and insulating and hermetically United with them.

The connector provides tightness and thermal stability when heated to 500C. However, such construction is not power, because the lack of hard power enclosure prevents operation under conditions of elevated pressure or differential pressure. The choice of material for the metal cuffs limited by materials combined in LTR with the material of the ceramic insulator is not ensured accuracy of positioning pins for mnogoshipovyh connectors, operating at multiple joints and unsoldering.

The claimed invention solves the problem of improving the manufacturability and reliability of the electrical connector when the extended range of the used materials.

The problem is solved in that in a heat-sealed electrical connector containing a sealed plug and unpressurized outlet, each of which consists of a housing, an insulator and located in the holes of the insulator metal contacts, with sealed plug contains metal cuffs that are located between the surfaces of the pins and insulating and hermetically United with them, according to the invention, the node sealed ner is Apolonas the location of the outlet and contains a sleeve, covering each pin contact and a tapered end portion of each cuff, the inner surface of the sleeve is negative in relation to the covered surface of the cuff, the materials of the sleeve and plug, as well as material cuff and insulator are pairwise consistent coefficients of linear thermal expansion, but not agreed between the pairs, in addition, the working portion of the pin contact is made with multi-layered heat resistant and protivosvertyvayuschih coating and the body of the plug and socket are made of metal material.

The presence of distinctive features indicates that the proposed solution meets the condition of patentability “novelty.”

In the search process not identified technical solutions containing elements similar to the distinctive features of the proposed method, which allows to make a conclusion on compliance with a condition of patentability “inventive step”.

The possibility of solving the problem due to the fact that diversity constructively in place, and hence technologically, and over time, the two processes: sealing cuff relative to the insulator and sealing cuff relative to the pin contempraries and exclude the creation of a critical stress at work design in a wide range of temperatures. Constructive performance creates the possibility of stress relaxation that occurs during mechanical and thermal loads during connection and disconnections in the operation of the structural elements at high temperatures. This became possible due to stress relaxation resulting from inaccurate positioning of each pin contact by deformation of the thin tapered end of the cuff in the layer of plastic material that creates an airtight, the permanent connection and the relaxation of thermal stresses generated due to the difference in LTR.

New constructive design allows the seal spaced nodes separately, which, in turn, allows the use of pins with the floor, because it was realized, process connection, eliminating overheating of the coating during sealing of the site and the violation of its protective properties.

Thus, the proposed electrical connector meets the requirements of high reliability at high temperatures, allowing it to be used in those industries where reliability is one of the main requirements to the operation of the structure.

Metal pins 9 secured in the slots of the insulator 6 of the socket 2. Pins 8 secured in the holes in the insulator 5 of the plug 1 with cuffs 7. Cuff 7 is made in the form of hollow sleeves with a tapered end surface 11. The connection of the cuff 7 is carried out using a detachable connection, for example, by soldering, with the walls of the insulator 5. Cuff 7 protrude from the holes of the insulator opposite the installation of a socket 2. In C the inner surface 13 of each sleeve 12, at the site of contact with the conical part of the cuff 7, is made negative with respect to the covered surface. Between the inner surface 13 of the sleeve 12, the outer conical surface 11 of the cuff 7 and the outer surface of the plug 7 is formed by an airtight connection, such as soldering. At the end of the plug 8 is equipped with a laminated coating 15, which provides the resistance of the connector. The outer layer 16 of the cover 15 is made of a material excluding the setting and thereby providing a multiple articulation and dismemberment after use at high temperatures or after repeated heating - cooling cycles.

Thanks to this constructive implementation has managed to combine two functions fine legalempowerment conical element, on the one hand, ensuring accurate positioning of the pins in the sockets of the socket with minimal mechanical stresses that occur at the same time, on the other hand, the possibility of removing thermal stresses generated during heating design because of a difference cltr materials, and thermal cycles during operation of the connector.

When practicing the claimed design at the Institute was made of megusta install metal cuffs made of tantalum, joined by permanent connection to the insulator by soldering the solder glasses, simultaneously with fixation sleeves in the holes in the insulator are fixing the insulator in the housing by soldering.

Then in the simulator sockets installed pins from an alloy of copper, which was previously applied complex multilayer coating. As the coating used, for example, a coating of platinum through the Nickel sublayer, which provides the heat resistance of the connection and preventing its bonding with the surface of the metal contacts of the socket at high temperatures. This setup ensured accurate positioning of the free ends of the pins with the coating in the holes of the socket. The opposite ends of the pins were placed through the cuff to the place of otstykovki. In place of the engagement pin contact with the conical part of the cuff has established a sleeve of steel with negative inner surface with respect to covered surfaces and carried out a permanent connection, filling the gaps between the cuff, pin contact, and a sleeve, the material which has been agreed upon by Cllr material plug made of copper alloy. Material mange is that coordinated.

The operation of the electrical connector in the following order.

When mating plug and socket pins are in the sockets of the socket. The presence of the protective coating eliminates sticking of the material of the pins and sockets with increasing temperature during operation up to temperatures of 500-800With, and also prevents difficulties dismemberment plug and socket, due to the possible adhesion after heating to such temperatures.

At the same time, in the process of articulation may be offset pin contact when it is placed in the sockets of the socket, due to the presence of tolerance to the manufacturer, this shift causes the voltage in the place of fixation of the plug, however, because the pin contact in this design is the possibility of deformation displacement without breaching, this allows you to compensate for mechanical stresses arising due to the offset of the individual contacts. The stresses caused by inaccurate positioning will not be transmitted to the insulator and the housing, and is transmitted to the cuff, in the place of its tight connection with pin contact are offset by the offset pin and legkodeformiruemyh belt.

Thus, in the AMI plug and socket, it can be effectively repeated connection and disconnections last, even after use at high temperatures and numerous cycles of heating - cooling with simultaneous elimination of the problem of matching on cltr three or more materials in contact in a sealed plug connector.

The presence of thinned legkodeformiruemyh belt allows to compensate the voltage arising due to the difference in cltr materials pins, cuff, sleeve and insulator arising when heated during operation of the connector. This design run at the same time allows to compensate the mechanical displacement arising in the process of joining the plug and socket, due to inaccurate positioning.

Claims

1. Sealed heat-resistant electrical connector containing a sealed plug and unpressurized outlet, each of which consists of a housing, an insulator and located in the holes of the insulator metal contacts, with sealed plug contains metal cuffs that are located between the surfaces of the pins and insulating and hermetically United with them, distinguishing hand, opposite the location of the outlet, and contains additional sleeve covering the pin contact and the end part of the cuff, having a conical shape, the inner surface of the sleeve is negative in relation to the covered surface of the cuff, the parts of the unit are connected all-in-one connection, the materials of the sleeve and plug and materials cuffs and insulator are pairwise consistent coefficients of linear thermal expansion.

2. Sealed heat-resistant electrical connector according to p. 1, characterized in that the working portion of the pin contact is made with multi-layered heat resistant and protivosvertyvayuschih the floor.

3. Sealed heat-resistant electrical connector according to p. 1, characterized in that the plug is made of metal material, for example titanium.

 

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