31results about How to "Reduce arcing phenomenon" patented technology

The invention discloses a wear resisting material. Aluminum nitride, aluminum oxide, molybdenum disilicide and graphite powder particles are uniformly distributed in an aluminum alloy basal body; a composite micro-arc oxidation layer is distributed on the surface of the aluminum alloy basal body; the aluminum nitride, the aluminum oxide and the molybdenum disilicide are high in hardness to prominently improve the hardness and the wear resistance of the material; and through graphite powder, the antifriction can be improved. Through the composite micro-arc oxidation layer on the surface, the alloy surface wear resistance and corrosion resistance can be effectively improved. Strengthening phases of such elements as Sn, Ru, Sr, Lu, Cu, Mn, Mg, Mo and Fe in an alloy are in dispersion strengthening to improve mechanical performances of the material. In a preparation method, through a mode of attaching mixed powder on a pure aluminum metal wire, the mixed powder is positioned in the center of mother alloy liquid during casting, so that the quick dispersion and the homogenization of micropowder particles are facilitated, and the production efficiency is improved; and micro-arc oxidation film forming parameters and conditions are optimized, so that the hardness and the smoothness degree of oxide ceramic films are improved, the film thickness is reduced, and the wear resistance of the material is effectively improved.

The invention discloses an intelligent pantograph, which relates to the technical field of railway electric locomotives. The intelligent pantograph comprises an insulating upper arm, a wing-shaped pantograph head, a controller, an acceleration sensor, a pressure sensor and a temperature sensor, the wing-shaped pantograph head is provided with a main flap, an auxiliary flap and a sliding plate, andthe wing-shaped pantograph head is connected above the insulating upper arm through an intelligent lifting support frame; a main steering engine and an auxiliary steering engine are arranged in the airfoil bow head; and the rotating part of the main steering engine is connected with the main flap, the rotating part of the auxiliary steering engine is connected with the auxiliary flap, and the intelligent lifting supporting frame, the main steering engine and the auxiliary steering engine are all in signal connection with the controller. The vertical height of the wing-shaped bow head can be adjusted through the intelligent lifting supporting frame, the included angle between the main flap and the horizontal plane can be adjusted through the main steering engine, the included angle betweenthe auxiliary flap and the horizontal plane can be adjusted through the auxiliary steering engine, the adjustment basis is pantograph state information detected by an existing sensor, and then activeadjustment of the posture of the pantograph is achieved.

The invention discloses an electromagnetic switch for a starter, belongs to the start technology field of an engine starter and aims to solve a technical problem of contact arc caused by absorption of iron powder by a static contact existing in an electromagnetic switch for a starter in the prior art. The electromagnetic switch comprises a static core, a moving core, a coil, a contact plate, a static contact and a top rod, wherein the contact plate is fixed at one end of the top rod, the moving core is fixed at another end of the top rod, the moving core under the electromagnetic force generated by the coil moves to approach the static core, the contact plate and the static contact are made to realize contact through the top rod, and a bushing is arranged between the static core and the top rod. The electromagnetic switch is advantaged in that not only can the technical problem of contact arc caused by absorption of iron powder by the static contact existing in the electromagnetic switch for the starter in the prior art be solved, cleanliness of the contact is guaranteed, but also guiding precision of the top rod, high matching precision, low wear rate and long service life are realized.

The invention discloses a high voltage resisting level high molecular PTC (Positive Temperature Coefficient) thermistor and a manufacturing method thereof. The thermistor consists of a high molecular core material with high PTC characteristic and metal foil electrode layers attached to both sides of the core material. A bevel or an arc-shaped face can be formed in the periphery of a sheet attached to the metal foil electrode layers by way of cutting the sheet with tools with different tool bits in shape. The creep distance between two copper foil electrodes is longer than the original linear distance, so that the withstand voltage performance of the product is improved, the arc discharge between the electrodes is effectively reduced, and probability of abnormal situations such as breakdown and combustion is effectively reduced. The bevel or the arc-shaped face is directly cut on the high voltage resisting level high molecular PTC thermistor sheet, so that the manufacturing process is simple and meanwhile, no additional manufacturing steps are increased, the cost is lowered and the performance is improved, and the thermistors can be quickly and economically produced in a large scale.

A power casing comprises a body (1) made of a thick layer (4) with epoxy resin mixed material. The internal wall of the body is provided with a bus voltage-equalizing ring (2), and two ends are respectively provided with a copper spiral ring (21); the bus voltage-equalizing ring and the copper spiral rings are cast in the thick layer of epoxy resin mixed material of the casing; a shielding ring (3) is arranged between the voltage-equalizing ring and the grounding; two ends of the shielding ring are respectively provided with an arc (3) the internal and the external surfaces of which are encased with semiconductor material layers; the voltage-equalizing ring is provided with a spring leap (6) which contacts with the bus. The invention has the advantage that the voltage-equalizing ring and an earth shielding ring are additionally arranged in epoxy resin of a bus casing with a nominal voltage of 35kV to eliminate partial discharge and equalize the electric field; secondly, the end parts of the voltage-equalizing ring are additionally provided with the copper spiral rings to equalize the electric field to achieve better and closer combination with the epoxy resin thick layer and eliminate the air space. The invention has rational structure and can considerably reduce the partial discharge quantity and the phenomenon of casing discharge arc in operation and improve the operational safety and reliability; in addition, the invention has a long service life.

The invention relates to the field of switches, in particular to an electric arc rotation resisting switch. The electric arc erosion resisting switch comprises a first contact portion and a second contact portion. The first contact portion and the second contact portion are in sliding contact with each other. One end of the first contact portion is provided with a first alloy contact. One end of the second contact portion is provided with a second alloy contact. When the first contact portion is not in contact with the second contact portion, the first alloy contact is opposite to the second alloy contact. When the first contact portion is in contact with the second contact portion, the first alloy contact and the second alloy contact are arranged with the back towards each other. According to the electric arc rotation resisting switch, the two contact portions of the switch are provided with the alloy contacts respectively, after the two contact portions are in contact with each other and then separated, because the resistance of the alloy contacts is large, the discharging effect of the contact portions is lowered, and the probability of an arc discharging phenomenon is reduced; because the alloy contacts are resistant to erosion, the erosion, caused by an electric arc, of the contacts is reduced, the surfaces of the two contact portions of the on-load switch are protected, the stability of contact is guaranteed, and the service life of the switch is prolonged.

The invention provides a wafer fuse element having a precut line substrate for surface mounting to a circuit board. The wafer fuse element comprises a substrate body having an upper surface, a lower surface and two end rims connected the upper surface with the lower surface, the substrate body is provided with precut lines corresponding to the two end rims on one of the upper surface and the lower surface; a pair of separate conductive electrodes, the conductive electrodes comprise welding pad portions arranged on the supper surface and welding pin portions extending from the welding pad portions to the lower surface; a surrounding blocking layer which is arranged on the supper surface and is used for sealing and surrounding the welding pad portions, the surrounding blocking layer and the substrate body commonly form an accommodation space, the precut lines are not covered by the surrounding blocking layer and are exposed outside; a fuse body which is arranged in the accommodation space, two ends of the fuse body are respectively welded with the welding pad portions; and a sealing protection layer used for sealing and blocking the accommodation space.

The invention relates to a rocker switch, and belongs to the technical field of switches. The rocker switch comprises a rocker, a transition piece, a support piece and two outgoing line terminals; the rocker, the transition piece and the support piece are located between the two outgoing line terminals, the transition piece is pressed on the upper surface of the bottom of the rocker, and the supporting piece is supported on the lower surface of the bottom of the rocker. The rocker comprises a supporting plate and two movable contact plates, the two movable contact plates are connected to the two ends of the rocker, each movable contact plate is provided with a movable contact, each outgoing line terminal is provided with a static contact, and each static contact is located on the circular motion trail of the movable contact on the same side; a first included angle is formed between the plane where the movable contact face of each movable contact is located and the plane where the supporting plate is located, a second included angle is formed between the plane where the static contact face of each static contact is located and the horizontal plane, the first included angle and the second included angle are both larger than 0 degree and smaller than 180 degrees, and the sum of the first included angle, the second included angle and the rotating angle of the rocker is 180 degrees. By adopting the rocker switch, the service life of the rocker switch can be prolonged.

During machining, a tool electrode and a workpiece are immersed in electrolyte at the same time, the tool electrode is horizontally arranged below the workpiece, feeding of the workpiece is controlled by a feeding adjusting system, and rotation of the tool electrode is controlled by an electrode horizontal rotating system. According to the device, the relative position between the tool electrode and the workpiece in the traditional machining process is changed, and the workpiece is machined through the feeding movement of the workpiece. The layout form that a workpiece is inverted and a tool electrode is horizontally placed is adopted, linear or plane type machining is formed, the defect of single longitudinal point type machining of a conventional electrolysis electric spark machining device is overcome, the machining quality of a groove is greatly improved, corrosion removal products can be rapidly discharged out of electrodes under the action of gravity, the electrolyte flowing capacity in the machining process is enhanced, and the machining efficiency is improved. A stable gas film can be formed, so that the processing efficiency is improved.

The invention discloses an anti-electric shock power taking mechanism, which is used for being connected with a zero line assembly and/or a live line assembly in an electricity meter body and comprises a shell and a plurality of power taking wiring terminals, wherein the shell is provided with a matching groove, and a closing piece is arranged in the matching groove in a sliding mode and used forclosing or opening the matching groove; the power taking wiring terminals are movably arranged on the shell in a penetrating mode, each power taking wiring terminal is provided with a power taking position and a power failure position, and when the power taking wiring terminal is located at the power failure position, the power taking wiring terminal is located above the closing piece, is disconnected from the zero line assembly or the live line assembly and can be connected with a wire; when the power taking wiring terminal is located at the power taking position, the power taking wiring terminal is arranged in the matching groove in a penetrating mode, and the power taking wiring terminal is electrically connected with the zero line assembly or the live line assembly.