Abstract:
An ignition device such as a spark plug (10) having center and ground electrodes (16, 18), at least one of which includes a firing tip (20, 22) formed from an alloy containing iridium, rhodium, tungsten, and zirconium. With the inclusion of tungsten and zirconium in the alloy, the percentage of rhodium can be kept relatively low without sacrificing the erosion resistance or reduced sparking voltage of the firing tip. In one embodiment, the firing tip (20, 22) contains 2 wt % rhodium, 0.3 wt tungsten, 0.02 wt % zirconium, and the balance iridium.
Abstract:
A system for thermionic arc extinction via anode ion depletion. The system includes a fixed terminal end including at least a fixed conductor containing at least a fixed contact. The system includes a moveable terminal end including at least a moveable conductor containing at least a moveable contact. The system includes a body including an inner compartment, wherein the inner compartment includes at least an arc shield housing at least two arcing contacts, the at least two arcing contacts including at least an anode contact and at least a cathode contact.
Abstract:
Eine im Selbstdurchbruch betriebene Schaltfunkenstrecke hat einen durch die beiden Elektroden gebildeten Spalt aus Borda-Profil-Wänden. Die Vermessung einer solchen Funkenstrecke mit einer Kugelfunkenstrecke deckt die spannungslokalisierte Zündzuverlässigkeit der gegenüber der Kugelfunkenstrecke eindrücklich auf.
Abstract:
Представлен разрядник для грозозащиты элементов электрооборудования или линии электропередачи, содержащий разрядное устройство (дугогасительное устройство), высоковольтный электрод, низковольтный электрод и внешний технологический искровой промежуток, служащий для подключению разрядника к высоковольтной сети, который образован между высоковольтным электродом разрядника, и электродом высоковольтной сети, а также защитный промежуток, образованный между низковольтным электродом, подключенным к низковольтной части дугогасительного устройства и высоковольтным электродом. Защитный промежуток образован таким образом, что его канал разряда развивается между пятном электрода, с которого развивается разряд при подключении дугогасительного устройства к высоковольтной сети, и низковольтным электродом. Благодаря тому, что при срабатывании технологического промежутка между электродами на конце электрода образуется расплавленное металлическое пятно, и в пространстве вблизи него - плазменное проводящее облако, создаются благоприятные условия для пробоя защитного промежутка. Он пробивается при относительно низком напряжении, существенно меньшем, чем разрядное напряжение защитного промежутка известной конструкции между холодными электродами.
Abstract:
The present invention relates to a device for emitting acoustic pulses. The device, according to the invention, comprises an enclosing structure having at least one reversibly deformable wall and adapted to be put in contact with a liquid of propagation of acoustic pulses external to said enclosing structure. The enclosing structure is arranged so as to define, at least partially, an internal volume confined with respect to said liquid of propagation. Said internal volume is filled, at least partially, with a conductive liquid having an electrical conductivity lower than 5 mS/cm, at a temperature of 20 °C. The device, according to the invention, also comprises an assembly for generating acoustic pulses comprising at least a pair of electrodes, including a first electrode (or anode electrode) and a second electrode (or cathode electrode) spaced one from another. Said first and second electrodes are arranged so as to be in contact with said conductive liquid and so that a separation space between said first and second electrodes is occupied by said conductive liquid. Said first and second electrodes are electrically connectable to a power source and are adapted to receive electrical energy from said power source so that an electric discharge is generated between said first and second electrodes and, consequently, an acoustic pulse is generated and it is transmitted to said liquid of propagation of the acoustic pulses through the deformable wall of the enclosing structure.
Abstract:
The invention relates to an integrated flue-support construction (2) for a Marx generator (1) comprising several generator stages (3). According to the prior art, a flue (2) for purifying the air of switching spark gaps (4) is arranged separately from a support structure for the switching spark gaps (4), impulse capacitors (5) and series and parallel resistors (7, 8). According to the invention, the flue (2) adopts a supporting function for the switching spark gap (4) and individual or all electrical components (5-10) of the impulse wave switching circuit. According to one form of embodiment, the flue (2) consists of a triangular cylinder support construction (2), the side walls (11) being formed from insulating panels (11) and each receiving one of the electrical components: a switching spark gap (4), an impulse capacitor (5) and resistors (7, 8). The advantages of the invention are as follows: less complicated construction measures and reduced costs, compact construction with a small flue cross-section surface (22) and therefore, low self-inductance of the impulse wave switching circuit and a simple production process, simple transportation and simple handling due to the plug-in modules (14) for at least one generator stage, respectively.
Abstract:
Spark plugs are disclosed that include electrode arrangements to improve the charge flow into and out of the annular volume around the insulator nose and a pre-chamber volume of a pre-chamber device, thus directing a purge of exhaust gases trapped in the annular volume to a space formed by the exterior of the spark plug body and the interior of the pre-chamber device.
Abstract:
An ignition device such as a spark plug (10) having center and ground electrodes (16, 18), at least one of which includes a firing tip (20, 22) formed from an alloy containing iridium, rhodium, tungsten, and zirconium. With the inclusion of tungsten and zirconium in the alloy, the percentage of rhodium can be kept relatively low without sacrificing the erosion resistance or reduced sparking voltage of the firing tip. In one embodiment, the firing tip (20, 22) contains 2 wt % rhodium, 0.3 wt tungsten, 0.02 wt % zirconium, and the balance iridium.