41results about How to "Reduce the degree of ablation" patented technology

The invention provides a hybrid circuit breaker topology system used for alternating-current capacitive load switching. The system comprises a three-phase alternating-current feeder line, a hybrid circuit breaker topology structure and a coordination controller, wherein the coordination controller is connected with the three-phase alternating-current feeder line, collects, analyzes and processes avoltage amplitude and a phase signal of the three-phase alternating-current feeder line, the three-phase alternating-current feeder line is connected with the hybrid circuit breaker topology structure, and operation of the hybrid circuit breaker topology structure is supported through a voltage of the three-phase alternating-current feeder line; and the coordination controller is in bidirectionalconnection with the hybrid circuit breaker topology structure, and the coordination controller uses an acquired three-phase alternating-current feeder line voltage amplitude and the phase signal to drive the hybrid circuit breaker topology structure to carry out on-off closing phase selection action, and receives an on-off closing signal fed back by the hybrid circuit breaker topology structure.In the invention, the coordination controller coordinates and controls on-off closing cooperation action between hybrid circuit breakers so as to reduce an ablation degree of circuit breaker contacts,prolong a service life of the circuit breaker which is applied to the alternating-current capacitive load switching, and improve reliability.

The invention belongs to a vacuum circuit breaker field and especially relates to a disc-type gyromagnetic transverse blowing vacuum arc extinguish chamber. The vacuum arc extinguish chamber comprises: a conducting rod (1), a contact cup bottom (2), an iron core (7) and a contact cup (3). The contact cup bottom (2), the contact cup (3) and the conducting rod (1) are successively matched. The contact cup (3) is provided with circulating tanks with equal intervals. A deflection angle of the circulating tanks and a longitudinal axis of the conducting rod (1) is 15-35 DEG. The iron core (7) is placed in the contact cup (3). The iron core (7) is provided with winding slots (6) with equal intervals. Coil windings (8), which are distributed along a radial direction and are in a radiation shape, form a disc structure. A contact blade is fixedly arranged on an end of the contact cup bottom (2). According to the invention, through a strong force of a rotating magnetic field and simultaneously under an effect of a vertical magnetic field, an arc voltage can be reduced; arc columns are impelled to be uniformly distributed on an anode surface; arc energy release can be accelerated; a breaking capacity of the vacuum circuit breaker can be increased.

The invention belongs to the field of high-voltage SF6 circuit breakers, and in particular relates to a cyclone energy-separated high-voltage SF6 circuit breaker and its energy separation method, which includes a piston (1), a cylinder (2), a moving main contact (3), a moving arc Contact (4), static arc contact (5), static main contact (6) and spout (7); upstream of the spout (7), a vortex is fixed near the end of the moving arc contact (4). The swirl guide mechanism (8); the vortex guide mechanism (8) is composed of a group of guide vane units (9) adopting a cross structure; the vortex guide mechanism (8) can also be composed of a fan-type guide vane ( 16) or spiral guide vanes (21) constitute. The invention makes the SF6 gas flowing out of the compressed air cylinder perform a vortex motion, forming a temperature gradient change along the radial direction during the motion process, the arc energy dissipates rapidly, the arc temperature drops quickly, the insulation performance is good, and the breaking capacity is strong. Easy installation and maintenance, high operating reliability.

The invention discloses a pre-combusted aircraft engine plasma igniter. The pre-combusted aircraft engine plasma igniter comprises an outer tube, a ceramic tube fuel channel, a cathode portion, an anode, an insulation sleeve, a bushing and a top cover; the cathode portion is installed on the middle-lower portion of the ceramic tube fuel channel in a sleeving mode, and a nozzle is arranged at the front end of the ceramic tube fuel channel; the insulation sleeve is installed on the middle-upper portion of the cathode portion in a sleeving mode and arranged in the outer tube; air inlet holes areformed in the outer wall of the lower portion of the outer tube, the anode is arranged under the air inlet holes, the upper portion of the anode is located in the outer tube and is in threaded connection with the outer tube, and the anode is a hollow revolving body; the cathode portion comprises a cathode base and a cathode, the upper portion of the cathode is in threaded connection with the lowerportion of the cathode base, and a spiral groove is formed in the middle of the inner wall of the anode; the lower end of the bushing is fixedly connected with the upper end of the cathode base; andthe top cover is installed outside the bushing in a sleeving mode, and the lower portion of the top cover is fixedly connected with the upper end of the outer tube. According to the pre-combusted aircraft engine plasma igniter, the ceramic tube fuel channel is additionally installed in the cathode portion, a reaction occurs outside the anode, therefore, electrodes are protected, the safety is improved, and the insulating problem is well solved.

The disclosed installation for testing heat value of propelling agent containing boron and deficient oxygen is to overcome shortcoming in prior art that propelling agent is unable to burn fully, and part of oxidation bomb is ablated. The invention has following arrangement: using thick walled vessel as body, exhaust valve, electrode, and charge valve installed on head; electrode insulated to the head; ignition thread connected between the charge valve and the electrode, and ignition thread being as wire with known heat value; through ignition thread, sample enwound and hung on the oxidation bomb; sample apart from crucible a certain distance; crucible is on rank; additive for combustion with known heat value in specified mass is placed on the crucible. The said additive for combustion guarantees complete combustion of the propelling agent. Since the propelling agent with high heat value does not burn inside crucible totally so as to reduce ablation degree for crucible.

The invention discloses an asymmetric coil-type rotating magnetic vacuum arc extinguishing chamber contact system, which is characterized by comprising a static conductive rod, an A-phase coil, a B-phase coil, a conductive base, a static contact sheet, a moving contact, a moving conductive rod, a first A-phase crank arm, a first B-phase crank arm, a second B-phase crank arm and a second A-phase crank arm, wherein the static conductive rod is welded with the first A-phase crank arm and the second B-phase crank arm; the conductive base is welded with the second A-phase crank arm and the first B-phase crank arm; the conductive base is welded with the static contact sheet; the A-phase coil is welded with the first A-phase crank arm and the second A-phase crank arm; and the B-phase coil is welded with the first B-phase crank arm and the second B-phase crank arm. A rotating magnetic field can be generated between the contacts, arc energy can be quickly taken away through effects of the strong force of the rotating magnetic field, extinguishing of the arc can be facilitated, the opening and closing ability of a vacuum circuit breaker is improved, the ablation degree of the contact can be reduced, the contact structure can be protected, the service life of each contact is prolonged, mounting and maintenance are convenient, and operation reliability is high.

The invention discloses a multi-gap spark plug comprising a metal shell and an insulated ceramic core arranged in the metal shell. The metal shell is connected with a side electrode which is arranged in the same direction with the axial direction of the metal shell. The insulated ceramic core is internally provided with a main electrode which is arranged in the same direction with the axial direction of the insulated ceramic core. A guide electrode is arranged between the main electrode and the side electrode. The guide electrode is transversely arranged on an upward protruding boss of the insulating ceramic core and two ends of the guide electrode are exposed outside the boss. The axial line of the guide electrode is perpendicular to the main electrode and the side electrode respectively. According to the multi-gap spark plug, the guide electrode is transversely arranged on the boss of the insulating ceramic core, the guide electrode is perpendicular to the main electrode and the side electrode respectively, excluding the end faces of two ends of the guide electrode, other parts of the guide electrode are arranged in the boss, the heating area of the other parts is smaller than that of the end faces of the two ends, the ablation degree of the guide electrode is greatly reduced, the use time of the guide electrode is prolonged, thus the service life of the spark plug is raised, and the use time reaches 40000 hours.

The invention belongs to a vacuum circuit breaker field and especially relates to a disc-type overlapping gyromagnetic vacuum arc extinguish chamber. The vacuum arc extinguish chamber comprises: a conducting rod (1), a contact cup bottom (2) and a contact cup (3). The contact cup bottom (2), the contact cup (3) and the conducting rod (1) are successively matched. The contact cup (3) is provided with an iron core (7) which is equipped with winding slots (6) with equal intervals. Coil windings (8) are placed in the winding slots (6). The coil windings (8), which are distributed along a radial direction and are in a radiation shape, form a disc structure. A contact blade (4) is fixedly arranged on an end of the contact cup bottom (2). More than two groups of the coaxial coil windings (8) are stacked into the winding slots (6) and the coaxial coil windings are staggered with a certain angle theta. According to the invention, a transverse magnetic field can be provided and simultaneously a vertical magnetic field effect can be generated. Using the chamber of the invention helps the loss of the arc energy. The arc can be cooled quickly. An insulating property is good. A breaking capacity is good. Installation and maintenance is convenient. Operation reliability is high.

The invention provides an automatic capacity regulating distribution transformer and a capacity regulating method thereof. The distribution transformer comprises a transformer core, a capacity regulating switch, a load control switch and a comprehensive monitoring controller, and further comprises a transformer casing, wherein the capacity regulating switch and the load control switch are integrally designed and are suspended inside the transformer casing to be connected with the transformer core, the comprehensive monitoring controller is suspended out of the transformer casing, and is connected with the capacity regulating switch through a cable. The capacity regulating switch is composed of a permanent magnet operation mechanism and a disc-shaped switch, a fixed contact of the disc-shaped switch is connected with high and low voltage windings of the transformer core respectively, transformation of the low voltage winding is completed before the high voltage winding because the separated distances of a moving contact relative to the fixed contact are different during capacity regulating, so that currents born by a low voltage contact are reduced greatly, and ablation degree of the contact is alleviated; the comprehensive monitoring controller controls action sequences of a capacity adjusting negative control switch based on the action characteristics of the capacity regulating switch and the load control switch, capacity regulating is completed in an on-off period of the load control switch, and capacity changing time is shortened to be within 20ms.

The invention belongs to a vacuum circuit breaker field and especially relates to a disc-type overlapping gyromagnetic longitudinal blowing vacuum arc extinguish chamber. The vacuum arc extinguish chamber comprises: a conducting rod (1), a contact cup (5), an iron core (7) and an electrode (4) which is connected to the contact cup (5). The contact cup (5) is fixedly matched with the conducting rod (1). The iron core (7) is placed in the contact cup (5). The contact cup (5) is provided with a plurality of circulation side slots with equal intervals. The iron core (7) is provided with the winding slots (6) with the equal intervals. More than two groups of the coaxial coil windings (8) are stacked into the winding slots (6) and the coaxial coil windings are staggered with a certain angle theta successively. According to the invention, through a strong force of a rotating magnetic field and simultaneously under an effect of a vertical magnetic field, an arc voltage can be reduced; arc columns are impelled to be uniformly distributed on an anode surface; arc energy release can be accelerated; a breaking capacity of the vacuum circuit breaker can be increased.