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

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 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.