142results about "Contact materials" patented technology

The invention discloses a CuCr contact and a preparation method thereof, and belongs to the field of alloy contact manufacturing, the CuCr contact is divided into an arc contact area, a transition area and a conductive connection area, and the Cr content of each area is in gradient distribution and is sequentially reduced, so that interface stress concentration can be avoided, and the structural compatibility and mechanical reliability of the whole contact are improved; meanwhile, integrated forming is achieved through the 3D printing technology, the size and the component boundary of each area can be accurately controlled, the complex structure design requirement of the contact is met, and the problems that in the prior art, performance gradient cannot be achieved according to the function requirements of different parts of the contact, and the material utilization rate is low are solved; the printed contact does not have the phenomena of composition segregation, agglomeration, uneven pores and the like, and the problems that in the prior art, Cr elements are difficult to distribute uniformly in a Cu matrix, Cr particles are prone to segregation and agglomeration, local ablation resistance is insufficient, and burning resistance is low are solved.

A contact for a vacuum interrupter of a low, medium or high-voltage switchgear includes a contact rod composed of a first electrically conductive material and extending along a longitudinal axis of the contact, and a contact piece composed of a second electrically conductive material and fastened to an end face of the contact rod. The contact rod and the contact piece are materially bonded to one another at a connecting face. At least one of the contact rod or the contact piece has a wall which delimits the connecting face, rises perpendicularly to the longitudinal axis and is disposed such that the contact piece and the contact rod are also force-lockingly connected to one another by a force acting transversely to the longitudinal axis between the contact piece and the contact rod. A production method for such a contact is also provided.

A clapper-type electromagnetic relay, comprising a magnetic circuit part, a moving reed part, a static reed part. a first load lead-out end (4). and a second load lead-out end (5) electrically connected to the static reed part. The magnetic circuit part comprises a coil former (11). A static contact (32) of the static red part and a moving contact (22) of the moving reed part form a contact set. The first load lead-out end (4). the second load lead-out end (5), and the contact set are located on the same side of the coil former (11), and current carrying paths flowing through the first load lead-out end (4) and the second load lead-out end (5) are located on the same side of the coil former (11).

The invention relates to a method for producing a contact layer (2) on a contact electrode (1) of a vacuum interrupter (100), a layer of contact-layer printing paste (300) being printed onto a front face (7) of the contact electrode (1) by way of screen printing in order to form the contact layer (2).

The invention relates to the technical field of contact materials for high-voltage electrical equipment, and particularly discloses a contact material, a preparation method and a contact state monitoring method. The contact material includes a base material; the surface of the substrate material is combined with a porous HEAs framework, and the porous HEAs framework is provided with through holes perpendicular to the substrate material; the through holes are filled with phase change alloy, and the melting point of the phase change alloy is smaller than or equal to 200 DEG C. An integrated double-layer structure is adopted, a substrate material with excellent static electrical performance is combined with a porous HEAs framework-phase change alloy composite surface layer with dynamic response characteristics and self-adjusting performance, the contact material is endowed with the electric arc energy active dissipation, erosion self-inhibition and surface self-repairing capacity, and through doping modification of rare earth elements, the contact material can be subjected to surface self-repairing, so that the service life of the contact material is prolonged, and the service life of the contact material is prolonged. Consumption monitoring of the contact material in the working state is achieved, and the technical bottleneck that an existing contact material lacks active protection, self-adaptive repairing and state monitoring is solved.

The invention provides a static contact of an electric switch, which at least comprises a conductive connecting piece, a contact point and a conductive body, the contact point is welded on the conductive body or the conductive connecting piece, the conductive body and the conductive connecting piece are arranged in a split or integrated manner, and the contact point is welded on the conductive body or the conductive connecting piece based on the total volume of the conductive body. The volume ratio of the conductor made of the iron material in the conductor is 30%-100%, or the material of the conductor at least contains more than 30% of the iron material in volume ratio. The invention also provides an electromagnetic release comprising the static contact. The invention relates to a static contact of an electric switch, which is applied to the electric switch, because an electric conductor containing an iron material is arranged in a main loop, part of arc energy is consumed on the iron material when the electric switch is switched off by utilizing the positive temperature coefficient characteristic of the iron material, so that the current limiting coefficient of the electric switch is reduced; the current limiting performance of the electrical switch can be improved.

Formulations of each group of graphene, graphene carbon, metal and dielectric ink compatible with each other for making high performance film touch switches (MTSs) are disclosed. The components of these inks are optimized to achieve a higher degree of compatibility with highly engineered polymer substrates, providing an overall solution for manufacturing high performance MTS. These material sets may also be used to fabricate sensors, biosensors, and RFID on flexible substrates such as polymers and paper.

The invention discloses an electric contact material for a high-resistance circuit breaker and a preparation method of the electric contact material, and relates to the technical field of electric contact materials for circuit breakers, the material comprises the following components based on 100 parts by weight of the total weight of a finished product: 92.0-96.8 parts by weight of a pre-alloyed matrix phase which is Ag-30Ni pre-alloyed powder prepared by a gas atomization method; an in-situ carbon reinforcing phase: 1.0 to 2.0 parts by weight of a novolac resin powder as a carbon precursor; the three-phase functional layer phase is 0.1-5.0 parts by weight and is one of tungsten carbide and titanium carbide or a compound of tungsten carbide and titanium carbide according to the weight ratio of 1: 1; the copper infiltration filling phase is electrolytic copper powder or oxygen-free copper liquid; a multi-phase synergistic material system is constructed, all components are complementary, core performance such as arc resistance is balanced and optimized, and the problem that a traditional contact material is short in service life is solved; a precise preparation process chain is integrated, the structure and performance are directionally regulated and controlled, defects are reduced, the anti-loss capacity is improved, the strict requirements of a high-resistance circuit breaker are met, and the service cycle is prolonged.

The invention discloses a multi-contact disconnecting switch and a copper bar stamping device. The multi-contact disconnecting switch comprises a disconnecting switch body and a movable knife switch, and one end of the movable knife switch is hinged to the top of an insulator column of the disconnecting switch body through a compression spring bolt and a hinge seat; the movable knife switch comprises two copper bar bodies which are arranged face to face, the inner side walls of the copper bar bodies are provided with more than two protruding strips in a full-length mode, and the protruding strips are symmetrically arranged in the width direction of the copper bar bodies. And the outer wall of the raised line is in contact with the outer wall of the contact. According to the invention, the convex strips are arranged on the contact surface in a full-length manner and are in multi-contact contact with the contact, so that virtual connection and impurity padding are avoided, and the temperature of the contact during normal operation is reduced.

A device for thermionic arc extinction via anode ion depletion. The device includes a body including an inner compartment. The inner compartment includes at least an arc shield housing at least two arcing contacts, wherein the two arcing contacts are zinc-plated. The at least two zinc-plated arcing contacts further comprise a thickness and contact area customized based on a desired corrosion time of the zinc, wherein the corrosion time corresponds to extinction of the arc. A sensor is associated with the device. The sensor is configured to operate the movement of the at least two arcing contacts.

The invention discloses an outdoor high-voltage isolation switch, and relates to the technical field of high-voltage switches, and the outdoor high-voltage isolation switch comprises an isolation pedestal which is used for the fixed installation of the isolation switch, and is fixedly provided with two groups of insulating pillars; the connecting contact is fixedly installed on the insulating supporting column, one end of the connecting contact is provided with a connector lug connected with a high-voltage wire, and the other end of the connecting contact is fixedly provided with a knife switch support used for installing a switch knife switch; and one end of the switch blade is rotatably mounted on the blade bracket of one group of connecting contacts, and the other end of the switch blade is in contact with or separated from the other group of connecting contacts to realize on-off control of the switch. The invention has the advantages of reducing contact abrasion, improving connection stability and prolonging service life.

The application discloses a structure-reinforced longitudinal magnetic contact and a vacuum arc-extinguishing chamber using the same, and belongs to the technical field of vacuum arc-extinguishing chambers. The structure-reinforced longitudinal magnetic contact comprises a static contact combined structure and a dynamic contact combined structure. The static contact combined structure comprises a static conductive rod, a static excitation contact seat welded at one end of the static conductive rod, a static stainless steel cup seat with a wing piece and a static contact piece. The dynamic contact combined structure comprises a dynamic conductive rod, a dynamic excitation contact seat welded at one end of the dynamic conductive rod, a dynamic stainless steel cup seat with a wing piece and a dynamic contact piece. The wing piece structure attached to the dynamic and static stainless steel cup seats is matched with the slotted gap of the dynamic and static excitation contact seats, and is installed in the longitudinal magnetic slotted gap to play a supporting role. The surfaces of the dynamic and static stainless steel cup seats and the attached wing pieces are coated with an insulating layer, and the electrical performance of the original contact is not affected. On the basis of meeting the insulation, current flow and excitation design of the contact, the mechanical strength of the contact is greatly reinforced.

The utility model relates to a composite contact and a relay. The composite contact includes a substrate and an electrical contact layer. The base body is provided with a first surface, and the edge of the first surface is provided with a first embedding groove. The electric contact layer comprises a main body part and a first embedding part connected with the main body part, the main body part is arranged on the first surface, a first through hole is formed in the edge of the main body part, and the first through hole is opposite to a notch of the first embedding groove. The first embedding part extends from the hole wall of the first through hole to the direction close to the groove bottom of the first embedding groove, and the first embedding part is arranged in the first embedding groove. Therefore, the embedded structure that the first embedded part is embedded into the first embedded groove is not limited by the processing technology, the material consumption of the electric contact layer can be reduced, and the cost is saved.

Provided is a copper terminal material with a film, which prevents the occurrence of adhesion when used as a connector, and which stably reduces the insertion / extraction force. A film is formed on a substrate comprising copper or a copper alloy, a tin layer comprising tin or a tin alloy having an average thickness of 0.2 [mu] m to 2.0 [mu] m is provided on the surface of the film, the arithmetic mean curvature (Spc) of the peak points of the surface of the film is 10 mm-1 to 70 mm-1, and the standard deviation / average value of the Spc when 10 fields of view are measured is 30% or less.

The invention relates to a device (3) for controlling the temperature of a vacuum interrupter (1), comprising a housing (5) and two switch contact elements (7, 8) which are movable relative to each other and which are arranged in the housing (5) and are surrounded by a metal housing central region (9) of the housing (5). According to the method, a first alternating voltage (U1) with a first frequency (f1) is applied to a first switch contact element (7), a second alternating voltage (U2) with a second frequency (f2) is applied to the second switch contact element (8), and a third alternating voltage (Uk) with a third frequency (fk) is applied to the housing central region (9), wherein at least two frequencies (f1, f2, fk) differ from each other.

The invention discloses an AgSnO2 contact material and a preparation method thereof, relates to the technical field of electric contact materials for electric appliances, and solves the problems of high resistivity, poor welding resistance, short arc resistance life, high production cost and the like of contact materials in the prior art. The raw materials of the contact material comprise raw material powder and a dispersing agent, wherein the raw material powder comprises the following components in percentage by mass: 79-90% of Ag powder, 4-10% of Sn powder and 4-10% of alkali metal M powder; the dispersing agent accounts for 0.2-1% of the mass of the raw material powder. According to the preparation method, the AgSnO2 contact material with low resistivity, high welding resistance and long arc-resistant life is obtained through the synergistic effect of methods such as alkali metal doping, freeze drying and oxidation after sintering, the arc-resistant life and other properties of the obtained contact material are improved by 15% or above compared with those of a conventional AgSnO2 material, the process is simple, and the production cost is low.

To provide terminals employing plating films of a noble metal or a single metal, whose durability is improved even when operated under a high temperature environment, while a plating film made of a noble or single metal, such as a silver or tin plating film, is widely applied to contacts or terminal components used for the connectors, switches, or relays of electronic devices because of high conductivity.SOLUTION: A terminal includes a plating layer formed on the surface of a base material. The plating layer has a structure in which an intermetallic compound crystal including Sn, Cu, Cr, and Ni is dispersed in a parent layer including Sn and a Sn-Cu alloy. The terminal has a concentration gradient in the plating layer, in which the concentration of Cu and Sn changes from the base material toward the terminal surface.SELECTED DRAWING: Figure 1

This invention discloses a method for preparing silver-tin oxide wire for rivet-type contacts. The technical solution employs a bidirectional hot pressing process, which greatly improves the density of the ingot, resulting in near-fully dense finished wire. This improves the wire's plastic deformation capability and avoids cracking abnormalities caused by poor material density during subsequent rivet manufacturing. A low-hardness pure silver plating layer is formed by spraying onto the ingot surface, directly preventing the high-hardness silver-tin oxide layer from contacting the extrusion liner, extrusion die, extrusion nozzle, drawing die, and annealing fixture during hot extrusion, hot drawing, and annealing processes. This significantly improves the surface quality of the final finished wire, thereby mitigating cracking abnormalities during final rivet manufacturing. The hot spraying process forms a multi-layered composite material in the extruded wire: a low-hardness, easily machinable pure silver coating layer and an internal high-hardness, brittle AgSnO2 structure. This significantly reduces the fracture abnormalities that occur during subsequent hot drawing, improving the material yield.

The invention discloses a silver tin oxide / copper rivet type electrical contact and a preparation method thereof, the point contact comprises a nail head and a nail tail, the bus shapes of the nail head and the nail tail are cylindrical, and the nail head is composed of a nail head surface layer and a nail head bottom layer; cylindrical array structures are uniformly distributed on the surface layer of the nail head; the material of the nail head surface layer is Ag-xSnO2-yM, the content of x is 5-8 wt.%, the content of y is 2-3 wt.%, and M is one of lanthanum, antimony and cerium; the material of the nail head bottom layer is Cu-zSn, and the content of z is 5-10 wt.%; and the nail tail is made of Cu. According to the method, the high-performance rivet type electrical contact with high hardness, low resistivity and long service life can be prepared, the hardness is improved by more than 20% compared with that of a conventional electrical contact, the hardness of the material is greatly improved, the resistivity is reduced, the service life of the electrical contact is prolonged, and meanwhile the method has the advantages of being simple in process, suitable for mass production and the like.

The utility model discloses a relay with a high-bearing contact, which relates to the technical field of relays and comprises a relay body, a base is fixedly connected to one side of the bottom end of the relay body, a movable contact spring is fixedly connected to one side of the top end of the base, and a movable contact is fixedly connected to the outer surface of the movable contact spring. The outer wall of the bottom end of the movable reed is fixedly connected with a movable reed bottom plate, the bottom end of one side of the movable reed bottom plate is fixedly provided with a movable reed leading-out pin, the other side of the top end of the base is fixedly provided with a static reed, and the outer side surface of the static reed is fixedly connected with a static contact. The HRS3FT lead-out pin with the width of 1.3 mm can enable heat to be dissipated more quickly, so that the risk of performance reduction or damage caused by overheating of the movable reed and the static reed is reduced, meanwhile, the diameter of the contact and the thickness of the composite layer are increased, the bearing capacity of the contact is effectively improved, and when 16A current is processed, compared with HRS3FN, the HRS3FN can better cope with the heat effect and mechanical stress brought by large current.

Grounding systems, grounding components, and methods of manufacturing, assembling, and using the same to provide dynamic and adaptable electrical grounding. In one aspect, an adaptable grounding system is provided. The grounding system may include a plurality of grounding components positioned to adaptively engage with an electrical-grounding surface, e.g., facilitating improved electrical contact. The grounding components may be mounted on a first structure which is opposite to a second structure that includes an electrical-grounding surface. The first structure and / or the second structure may be adjustable, e.g., between at least a first configuration, e.g., a non-grounded configuration, and a second configuration, e.g., a grounded configuration. The grounding systems, components, and related methods described herein may be used with different manufacturing systems and processes including those that are electrically-driven.

The application discloses a copper-chromium contact material surface alloy film for a vacuum circuit breaker and a preparation method thereof, and belongs to the technical field of contact material surface modification. The preparation method of the copper-chromium contact material surface alloy film for the vacuum circuit breaker is as follows: Cu target, Cr target and Nb target are used as target materials, a CuCrNb alloy film is deposited on a CuCr alloy substrate by adopting a magnetron sputtering method, and a CuCr alloy substrate with the CuCrNb alloy film is obtained; the CuCr alloy substrate with the CuCrNb alloy film is subjected to annealing treatment under inert atmosphere protection, Cu phases on the surface of the CuCrNb alloy film are uniformly distributed during the annealing process, and Cr2Nb phases are generated, and a copper-chromium contact material surface alloy film is obtained. The CuCrNb alloy film prepared by the application improves arc dispersion capacity of a contact surface, stability and voltage resistance strength of a discharge process, and thus improves arc ablation resistance of the contact.

The invention discloses a silver-tungsten composite electric contact material and a preparation method and application thereof. The silver-tungsten composite contact material is obtained by directly curing nano tungsten-silver powder with a core-shell structure at high temperature through an electric spark plasma sintering technology, wherein the silver-tungsten composite contact material is composed of nanoscale tungsten and silver particles; the preparation method comprises the following steps: introducing a silver nanoparticle metal shell layer on the surface of a nano tungsten particle through a two-step chemical plating means to obtain nano tungsten-silver powder, and then directly curing the nano tungsten-silver powder at high temperature by adopting an electric spark plasma sintering technology under a vacuum condition. The silver-tungsten composite contact material provided by the invention has excellent physical properties and excellent arc erosion resistance, and has a uniform and compact microstructure.

The invention relates to the field of electric contact elements, in particular to a gradient failure type insulation contact structure and a preparation method thereof. The contact sequentially comprises an iron base layer, a copper conductive middle layer and a silver alloy contact layer from bottom to top. The middle area of the surface of the copper conductive intermediate layer is recessed downwards to form a mounting groove, and the opening size of the mounting position along the width direction of the contact does not exceed 2 / 3 of the total width of the upper surface of the copper conductive intermediate layer; the copper conductive middle layer forms flow guide shoulder parts on the two sides of the mounting groove; an insulating part is arranged in the mounting groove; the silver alloy contact function layer covers the upper surface of the middle layer and is combined with the flow guide shoulder part for electric conduction; a non-contact gap is formed between the bottom surface of the contact function layer and the groove bottom of the mounting groove, and the contact function layer is electrically connected with the copper conductive middle layer only through the diversion shoulders on the two sides to form an electric conduction path. The active insulation failure when the service life of the contact is ended is realized, and the fusion adhesion and short circuit risk is prevented.

The invention provides a switch with at least two poles, which at least comprises an insulating shell and elements arranged inside the insulating shell, and the internal elements at least comprise a moving contact device, a static contact device, an operating mechanism and an electromagnet mechanism; and a linkage device is arranged between the moving contact device and the electromagnet mechanism. The electromagnet mechanism can apply pressure to the short-arm moving contact of the moving contact device more quickly, the short resistance of the switch is improved, the installation and application requirements of an energy storage system PCS cabinet are met, and the PV2 requirement of a photovoltaic electric appliance is met at the same time.

The utility model provides a copper contact with an arc protection structure, which relates to the technical field of copper contacts and comprises a base, the top of the base is fixedly connected with a shell and a plurality of supporting rods, and permanent magnet rings are fixedly connected among the top ends of the supporting rods. The outer surface of the permanent magnet ring is fixedly connected with a spiral heat dissipation plate, a surrounding wire is spirally wound on the outer surface of the permanent magnet ring, one end of the surrounding wire is electrically connected with an output wire, and the other end of the surrounding wire is electrically connected with a receiving wire. According to the utility model, an external magnetic field is applied through the permanent magnet ring to change the path of an electric arc, so that the path of the electric arc deflects, the electric arc is easier to disperse and extinguish, and meanwhile, the electric arc can be guided to a heat absorption area at the spiral heat dissipation plate to absorb heat generated by the electric arc, thereby reducing the temperature of the electric arc and reducing the damage of the electric arc to a surrounding wire; therefore, the arc-proof effect is achieved.

The invention relates to the technical field of radio frequency microwave devices, in particular to a W-band broadband RF MEMS multi-pole multi-throw switch, which comprises a silicon substrate, a plurality of input and output ports and an MEMS cantilever beam switch unit, the MEMS cantilever beam switch unit is provided with a driving electrode, and by applying voltage to the driving electrode, the W-band broadband RF MEMS multi-pole multi-throw switch is switched on and switched off. And connection and disconnection of a radio frequency signal path between the corresponding input port and the output port can be controlled. Deformation of the cantilever beam is controlled through electrostatic driving, on-off of a radio frequency signal path is achieved, the driving mode has the advantages of being low in power consumption, high in speed and easy to integrate, compared with a common single-pole structure, more complex signal routing can be achieved in a compact unit, the system integration degree and function flexibility are improved, and the cost is reduced. Through a horizontal swing type structure and a vertical lifting type structure, interference-free crossing is realized by utilizing a groove structure, the high-frequency parasitic effect is remarkably reduced, and the switch ensures the transmission quality of millimeter wave signals in a W wave band.