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81 источник
м. sourceисточник излучения — radiation source; radiator
«слоёный» источник — sandwiched source
источник тока — current source; power supply
Синонимический ряд:ключ (сущ.) ключ; криница; криницу; родник -
82 мощная электростанция
Русско-английский большой базовый словарь > мощная электростанция
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83 полное напряжение
1. мех. combined stress2. эл. total voltageнапряжение сети — mains voltage; supply-line voltage
напряжение сигнала выделяется на сопротивлении нагрузки RH — the signal voltage is developed across the load resistor RL
получать напряжение смещения за счёт протекания катодного тока через резистор — derive bias voltage by the passage of cathode current through a resistor
усиление по напряжению — voltage amplification; voltage gain
пусковое напряжение; отпирающее напряжение — trigger voltage
Русско-английский большой базовый словарь > полное напряжение
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84 статистическая обработка
1. static handling2. statistical treatmentРусско-английский большой базовый словарь > статистическая обработка
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85 ток смещения
1. displacement current2. bias currentток установившегося режима — steady-state current; steady-state current
ток холостого хода — no-load current; open-circuit current
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86 устойчивость
1. ж. stability2. ж. insensitivity, immunity, resistanceСинонимический ряд:постоянство (сущ.) константность; неизменность; постоянство; стабильность -
87 удар
shock
(при испытании на ударные нагрузки) — shock conditions, eighteen 10millisecond shocks at 15 g.
- (соударение двух масс) — impact а single collision of one mass with a second mass.
-, гидравлический — hydraulic shock
динамическое воздействие жидкости на трубопроводы при резком изменении ее скорости. — dynamic effect of the fluid on the tube wall at a sudden change in the fluid velocity.
-, динамический, при раскрытии купола парашюта — canopy opening shock load
-, звуковой — sonic boom
звук, издаваемый ударной волной от ла, летящего со звуковой или сверхзвуковой скоростью. — а noise caused by а shock wave that emanates from an aircraft traveling at or above sonic velocity.
-, обратный — back kick
явление, возникающее при запуске пд с поворотом вала в сторону, противоположную нормальному направлению вращения. — а phenomenon occuring when а reciprocating engine crankshaft turns in the direction opposite to normal rotation during starting.
-, повторный (при посадке, "козел") — rebound
- птицы (о самолет) — bird strike
-, тепловой — thermal shock
the development of a steep temperature gradient and accompanying high stresses within a structure.
- шасси о землю при посадке — impact of landing gear at touchdown
подвергать у. — subject to shock, strike do not strike or scratch the tube at any time.
раздавать мягкие вещи (одеяла, подушки) для предохранения от у. (при авар. посадке) — distribute pillows, blankets, etc., for use on impactРусско-английский сборник авиационно-технических терминов > удар
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88 Corliss, George Henry
SUBJECT AREA: Steam and internal combustion engines[br]b. 2 June 1817 Easton, Washington City, New York, USAd. 21 February 1888 USA[br]American inventor of a cut-off mechanism linked to the governor which revolutionized the operation of steam engines.[br]Corliss's father was a physician and surgeon. The son was educated at Greenwich, New York, but while he showed an aptitude for mathematics and mechanics he first of all became a storekeeper and then clerk, bookkeeper, salesperson and official measurer and inspector of the cloth produced at W.Mowbray \& Son. He went to the Castleton Academy, Vermont, for three years and at the age of 21 returned to a store of his own in Greenwich. Complaints about stitching in the boots he sold led him to patent a sewing machine. He approached Fairbanks, Bancroft \& Co., Providence, Rhode Island, machine and steam engine builders, about producing his machine, but they agreed to take him on as a draughtsman providing he abandoned it. Corliss moved to Providence with his family and soon revolutionized the design and construction of steam engines. Although he started working out ideas for his engine in 1846 and completed one in 1848 for the Providence Dyeing, Bleaching and Calendering Company, it was not until March 1849 that he obtained a patent. By that time he had joined John Barstow and E.J.Nightingale to form a new company, Corliss Nightingale \& Co., to build his design of steam-engines. He used paired valves, two inlet and two exhaust, placed on opposite sides of the cylinder, which gave good thermal properties in the flow of steam. His wrist-plate operating mechanism gave quick opening and his trip mechanism allowed the governor to regulate the closure of the inlet valve, giving maximum expansion for any load. It has been claimed that Corliss should rank equally with James Watt in the development of the steam-engine. The new company bought land in Providence for a factory which was completed in 1856 when the Corliss Engine Company was incorporated. Corliss directed the business activities as well as technical improvements. He took out further patents modifying his valve gear in 1851, 1852, 1859, 1867, 1875, 1880. The business grew until well over 1,000 workers were employed. The cylindrical oscillating valve normally associated with the Corliss engine did not make its appearance until 1850 and was included in the 1859 patent. The impressive beam engine designed for the 1876 Centennial Exhibition by E. Reynolds was the product of Corliss's works. Corliss also patented gear-cutting machines, boilers, condensing apparatus and a pumping engine for waterworks. While having little interest in politics, he represented North Providence in the General Assembly of Rhode Island between 1868 and 1870.[br]Further ReadingMany obituaries appeared in engineering journals at the time of his death. Dictionary of American Biography, 1930, Vol. IV, New York: C.Scribner's Sons. R.L.Hills, 1989, Power from Steam. A History of the Stationary Steam Engine, Cambridge University Press (explains Corliss's development of his valve gear).J.L.Wood, 1980–1, "The introduction of the Corliss engine to Britain", Transactions of the Newcomen Society 52 (provides an account of the introduction of his valve gear to Britain).W.H.Uhland, 1879, Corliss Engines and Allied Steam-motors, London: E. \& F.N.Spon.RLH -
89 Priestman, William Dent
SUBJECT AREA: Steam and internal combustion engines[br]b. 23 August 1847 Sutton, Hull, Englandd. 7 September 1936 Hull, England[br]English oil engine pioneer.[br]William was the second son and one of eleven children of Samuel Priestman, who had moved to Hull after retiring as a corn miller in Kirkstall, Leeds, and who in retirement had become a director of the North Eastern Railway Company. The family were strict Quakers, so William was sent to the Quaker School in Bootham, York. He left school at the age of 17 to start an engineering apprenticeship at the Humber Iron Works, but this company failed so the apprenticeship was continued with the North Eastern Railway, Gateshead. In 1869 he joined the hydraulics department of Sir William Armstrong \& Company, Newcastle upon Tyne, but after a year there his father financed him in business at a small, run down works, the Holderness Foundry, Hull. He was soon joined by his brother, Samuel, their main business being the manufacture of dredging equipment (grabs), cranes and winches. In the late 1870s William became interested in internal combustion engines. He took a sublicence to manufacture petrol engines to the patents of Eugène Etève of Paris from the British licensees, Moll and Dando. These engines operated in a similar manner to the non-compression gas engines of Lenoir. Failure to make the two-stroke version of this engine work satisfactorily forced him to pay royalties to Crossley Bros, the British licensees of the Otto four-stroke patents.Fear of the dangers of petrol as a fuel, reflected by the associated very high insurance premiums, led William to experiment with the use of lamp oil as an engine fuel. His first of many patents was for a vaporizer. This was in 1885, well before Ackroyd Stuart. What distinguished the Priestman engine was the provision of an air pump which pressurized the fuel tank, outlets at the top and bottom of which led to a fuel atomizer injecting continuously into a vaporizing chamber heated by the exhaust gases. A spring-loaded inlet valve connected the chamber to the atmosphere, with the inlet valve proper between the chamber and the working cylinder being camoperated. A plug valve in the fuel line and a butterfly valve at the inlet to the chamber were operated, via a linkage, by the speed governor; this is believed to be the first use of this method of control. It was found that vaporization was only partly achieved, the higher fractions of the fuel condensing on the cylinder walls. A virtue was made of this as it provided vital lubrication. A starting system had to be provided, this comprising a lamp for preheating the vaporizing chamber and a hand pump for pressurizing the fuel tank.Engines of 2–10 hp (1.5–7.5 kW) were exhibited to the press in 1886; of these, a vertical engine was installed in a tram car and one of the horizontals in a motor dray. In 1888, engines were shown publicly at the Royal Agricultural Show, while in 1890 two-cylinder vertical marine engines were introduced in sizes from 2 to 10 hp (1.5–7.5 kW), and later double-acting ones up to some 60 hp (45 kW). First, clutch and gearbox reversing was used, but reversing propellers were fitted later (Priestman patent of 1892). In the same year a factory was established in Philadelphia, USA, where engines in the range 5–20 hp (3.7–15 kW) were made. Construction was radically different from that of the previous ones, the bosses of the twin flywheels acting as crank discs with the main bearings on the outside.On independent test in 1892, a Priestman engine achieved a full-load brake thermal efficiency of some 14 per cent, a very creditable figure for a compression ratio limited to under 3:1 by detonation problems. However, efficiency at low loads fell off seriously owing to the throttle governing, and the engines were heavy, complex and expensive compared with the competition.Decline in sales of dredging equipment and bad debts forced the firm into insolvency in 1895 and receivers took over. A new company was formed, the brothers being excluded. However, they were able to attend board meetings, but to exert no influence. Engine activities ceased in about 1904 after over 1,000 engines had been made. It is probable that the Quaker ethics of the brothers were out of place in a business that was becoming increasingly cut-throat. William spent the rest of his long life serving others.[br]Further ReadingC.Lyle Cummins, 1976, Internal Fire, Carnot Press.C.Lyle Cummins and J.D.Priestman, 1985, "William Dent Priestman, oil engine pioneer and inventor: his engine patents 1885–1901", Proceedings of the Institution ofMechanical Engineers 199:133.Anthony Harcombe, 1977, "Priestman's oil engine", Stationary Engine Magazine 42 (August).JBBiographical history of technology > Priestman, William Dent
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90 Wöhler, August
SUBJECT AREA: Metallurgy[br]b. 22 June 1819 Soltau, Germanyd. 21 June 1914 Hannover, Germany[br]German railway engineer who first established the fatigue fracture of metals.[br]Wöhler, the son of a schoolteacher, was born at Soltau on the Luneburg Heath and received his early education at his father's school, where his mathematical abilities soon became apparent. He completed his studies at the Technical High School, Hannover.In 1840 he obtained a position at the Borsig Engineering Works in Berlin and acquired there much valuable experience in railway technology. He trained as an engine driver in Belgium and in 1843 was appointed as an engineer to the first Hannoverian Railway, then being constructed between Hannover and Lehrte. In 1847 he became Chief Superintendent of rolling stock on the Lower Silesian-Brandenhurg Railway, where his technical abilities influenced the Prussian Minister of Commerce to appoint him to a commission set up to investigate the reasons for the unusually high incidence of axle failures then being encountered on the railways. This was in 1852, and by 1854, when the Brandenburg line had been nationalized, Wöhler had already embarked on the long, systematic programme of mechanical testing which eventually provided him with a clear insight into the process of what is now referred to as "fatigue failure". He concentrated initially on the behaviour of machined iron and steel specimens subjected to fluctuating direct, bending and torsional stresses that were imposed by testing machines of his own design.Although Wöhler was not the first investigator in this area, he was the first to recognize the state of "fatigue" induced in metals by the repeated application of cycles of stress at levels well below those that would cause immediate failure. His method of plotting the fatigue stress amplitude "S" against the number of stress cycles necessary to cause failure "N" yielded the well-known S-N curve which described very precisely the susceptibility to fatigue failure of the material concerned. Engineers were thus provided with an invaluable testing technique that is still widely used in the 1990s.Between 1851 and 1898 Wöhler published forty-two papers in German technical journals, although the importance of his work was not initially fully appreciated in other countries. A display of some of his fracture fatigue specimens at the Paris Exposition in 1867, however, stimulated a short review of his work in Engineering in London. Four years later, in 1871, Engineering published a series of nine articles which described Wöhler's findings in considerable detail and brought them to the attention of engineers. Wöhler became a member of the newly created management board of the Imperial German Railways in 1874, an appointment that he retained until 1889. He is also remembered for his derivation in 1855 of a formula for calculating the deflections under load of lattice girders, plate girders, and other continuous beams resting on more than two supports. This "Three Moments" theorem appeared two years before Clapeyron independently advanced the same expression. Wöhler's other major contribution to bridge design was to use rollers at one end to allow for thermal expansion and contraction.[br]Bibliography1855, "Theorie rechteckiger eiserner Brückenbalken", Zeitschrift für Bauwesen 5:122–66. 1870, "Über die Festigkeitversuche mit Eisen und Stahl", Zeitschrift für Bauwesen 20:73– 106.Wöhler's experiments on the fatigue of metals were reported in Engineering (1867) 2:160; (1871) 11:199–200, 222, 243–4, 261, 299–300, 326–7, 349–50, 397, 439–41.Further ReadingR.Blaum, 1918, "August Wöhler", Beiträge zur Geschichte der Technik und Industrie 8:35–55.——1925, "August Wöhler", Deutsches biographisches Jahrbuch, Vol. I, Stuttgart, pp. 103–7.K.Pearson, 1890, "On Wöhler's experiments on alternating stress", Messeng. Math.20:21–37.J.Gilchrist, 1900, "On Wöhler's Laws", Engineer 90:203–4.ASD -
91 двигатель с постоянной нагрузкой
Авиация и космонавтика. Русско-английский словарь > двигатель с постоянной нагрузкой
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92 режим
режим сущbehaviorвертолет в режиме висенияhovering helicopterвзлет на режимах работы двигателей, составляющих наименьший шумnoise abatement takeoffвнезапно изменять режимchop the powerвоздушный винт на режиме малого газаidling propellerв режимеin modeв режиме большого шагаin coarse pitchв режиме готовностиin alertв режиме малого шагаin fine pitchв режиме самоориентированияwhen castoringвыбирать режимselect the modeвыбор режима работы двигателяselection of engine modeвывод из режима сваливания1. recovery from the stall2. stall recovery выводить двигатель из режима реверсаunreverse an engineвыводить на режим малого газаset idle powerвыполнять полет в режиме ожидания над аэродромомhold over the beaconвыходить на взлетный режимcome to takeoff powerгоризонтальный полет на крейсерском режимеlevel cruiseдальность полета на режиме авторотацииautorotation rangeдвигатель на режиме малого газаidling engineдиапазон взлетных режимовtakeoff rangeдиапазон рабочих режимовnormal operating rangeдиапазон режимов полетаflight envelopeзаданный режим полетаbasic flight referenceзадатчик режимаmode selector(полета) запуск в режиме авторотацииwindmill startingзаход на посадку в режиме планированияgliding approachзаход на посадку на установившемся режимеsteady approachзона воздушного пространства с особым режимом полетаairspace restricted areaиспытание в режиме висенияhovering testкрутящий момент воздушного винта в режиме авторотацииpropeller windmill torqueлетать в курсовом режимеfly heading modeлетать в режиме бреющего полетаfly at a low levelмаксимальный режимfull power conditionsмощность на режиме полетного малого газаflight idle powerмощность на чрезвычайном режимеcontingency powerнабор высоты в крейсерском режимеcruise climbнабор высоты до крейсерского режимаclimb to cruise operationна режиме малого газаat idle powerнерасчетный ветровой режимanomalous wind conditionsнеустановившийся режимunsteady modeнеустановившийся режим набора высотыnonsteady climbноминальный режимmaximum continuous powerобратная тяга на режиме малого газаreverse idle thrustоптимальный режимbest economy powerосновной режим воздушного пространстваdominant air modeпереключатель выбора режима работы автопилотаautopilot mode selectorпереключатель режимов работыmode selector switchпереход в режим горизонтального полетаpuchoverпереходить в режим набора высотыentry into climbпереход на режим висенияreconversion hoveringпериодический режимperiodic dutyповторно-кратковременный режимintermittent dutyповторный запуск на режиме авторотацииwindmilling restartполет в режиме висенияhover flightполет в режиме ожиданияholding operationполет в режиме ожидания на маршрутеholding en-route operationполет на крейсерском режимеnormal cruise operationполет на номинальном расчетном режимеwith rated power flightполет на режиме авторотацииautorotational flightпорядок набора высоты на крейсерском режимеcruise climb techniqueпосадка в режиме авторотации в выключенным двигателемpower-off autorotative landingпосадка на режиме малого газаidle-powerпотолок в режиме висенияhovering ceilingпредел скоростей на крейсерском режимеcruising speeds rangeпродолжительность в режиме висенияhovering enduranceпродолжительность работы двигателя на взлетном режимеfull-thrust durationпрямая тяга на режиме малого газаforward idle thrustработа в режиме запуска двигателяengine start modeработа двигателя на режиме малого газаidling engine operationработа на режиме холостого ходаidle runningработа только в режиме приемаreceiving onlyработать на режиме малого газаrun at idle powerработать на режиме холостого ходаrun idleрабочий режимoperating modeрадиус действия радиолокатора в режиме поискаradar search rangeразворот в режиме висенияhovering turnрасход на крейсерском режимеcruise consumptionрежим автоматической посадкиautoland modeрежим воздушного потока в заборнике воздухаinlet airflow scheduleрежим готовностиstandby modeрежим закрытых тарифовclosed-rate situationрежим запросаinterrogation modeрежим земного малого газаground idleрежим малого газа1. idle2. idling 3. idle power rating режим малого газа в заданных пределахdeadband idleрежим малого газа при заходе на посадкуapproach idleрежим обогреваheating modeрежим ожиданияholding modeрежим ответаreply modeрежим открытых тарифовopen-rate situationрежим поискаsearch modeрежим полета1. flight mode2. mode of flight режим полетного малого газаflight idleрежим работыratingрежим работы автопилота по заданному курсуautopilot heading modeрежим работы с полной нагрузкойfull-load conditionsрежим равновесных оборотовon-speed conditionsрежим согласованияsynchronization modeрежим стабилизации курсаheading hold modeрежим стабилизации на заданной высотеheight-lock modeрежим управленияcontrol modeрежим холостого ходаidle conditionsсертификация по шуму на взлетном режимеtake-off noiseснижать режим работы двигателяslow down an engineснижение в режиме авторотацииautorotative descentснижение в режиме планированияgliding descentснижение в режиме торможенияbraked descentснижение на крейсерском режимеcruise descentснижение на режиме авторотацииautorotative descend operationснижение режима работыthrottle retardingсовмещенный режимcoupled modeстартерный режим генератораgenerator motorizing modeтабло режимов работыmode annunciatorтепловой режимthermal behaviorтехника пилотирования на крейсерском режимеaeroplane cruising techniqueтормозной режим работыretardation modeтяга на взлетном режимеtakeoff thrustтяга на максимально продолжительном режимеmaximum continuous thrustтяга на режиме максимального газаfull throttle thrustтяга на режиме малого газаidling thrustтяга на установившемся режимеsteady thrustубрать режимpower offугол начального участка установившегося режима набора высотыfirst constant climb angleугол установившегося режима набора высотыconstant climb angleуказатель режима работыmode indicatorуправление на переходном режимеcontrol in transitionустанавливать взлетный режимset takeoff powerустанавливать режим набора высотыestablish climbустанавливать режим полетаestablish the flight conditionsустанавливать режим сниженияestablish descentустановившийся режимsteady modeустановившийся режим набора высотыconstant climbустановка режима работы двигателяthrottle settingфорсажный режимreheat powerфорсированный режимaugmented powerцифровой электронный регулятор режимов работы двигателяdigital engine controlчисло оборотов двигателя на взлетном режимеengine takeoff speedчрезвычайный режим работыcontingency ratingшаг в режиме торможенияbraking pitchштурвальный режимmanual modeэксплуатационный режимoperation conditionsэлеронный режим работыaileron mode -
93 энергия
аккумулировать энергиюstore energyзвуковая энергияsound energyкинетическая энергияkinetic energyмеханическая энергияmechanical energyотбирать энергиюtake the energy fromпоглощать энергию удараabsorb the shock energyтепловая энергияthermal energyэнергия маховикаflywheel energyэнергия пограничного слояboundary layer energyэнергия порыва воздушной массыgust loadэнергия потокаflow energyэнергия скачка уплотненияshock wave energyэнергия ударной волныshock-wave intensity -
94 прямой пуск вращающегося электродвигателя
- full voltage starter application
- DOL
- direct-on-line starting
- direct starting
- direct operation of a motor
- direct line starting
- across-the-line starting (US)
прямой пуск вращающегося электродвигателя
Пуск вращающегося электродвигателя путем непосредственного подключения его к питающей сети.
[ ГОСТ 27471-87]EN
direct-on-line starting
across-the-line starting (US)
the process of starting a motor by connecting it directly to the supply at rated voltage
[IEV number 411-52-15]FR
démarrage direct
mode de démarrage d'un moteur, consistant à lui appliquer directement sa pleine tension assignée
[IEV number 411-52-15]
Рис. ABB
Схема прямого пуска электродвигателяMagnetic only circuit-breaker - Автоматический выключатель с электромагнитным расцепителем
Contactor KL - Контактор KL
Thermal relay - Тепловое реле
Параллельные тексты EN-RU
Direct-on-line starting
Direct-on-line starting, which is often abbreviated as DOL, is perhaps the most traditional system and consists in connecting the motor directly to the supply network, thus carrying out starting at full voltage.Direct-on-line starting represents the simplest and the most economical system to start a squirrel-cage asynchronous motor and it is the most used.
As represented in Figure 5, it provides the direct connection to the supply network and therefore starting is carried out at full voltage and with constant frequency, developing a high starting torque with very reduced acceleration times.
The typical applications are relevant to small power motors also with full load starting.
These advantages are linked to some problems such as, for example, the high inrush current, which - in the first instants - can reach values of about 10 to 12 times the rated current, then can decrease to about 6 to 8 times the rated current and can persist to reach the maximum torque speed.The effects of such currents can be identified with the high electro-dynamical stresses on the motor connection cables and could affect also the windings of the motor itself; besides, the high inrush torques can cause violent accelerations which stress the transmission components (belts and joints) generating distribution problems with a reduction in the mechanical life of these elements.
Finally, also the possible electrical problems due to voltage drops on the supply line of the motor or of the connected equipment must be taken into consideration.
[ABB]Прямой пуск
Прямой пуск, который по-английски часто сокращенно обозначают как DOL, является, пожалуй наиболее распространенным способом пуска. Он заключается в непосредственном (т. е. прямом) подключении двигателя к питающей сети. Это означает, что пуск двигателя осуществляется при полном напряжении.Схема прямого пуска является наиболее простым, экономичным и чаще всего применяемым решением для электродвигателей с короткозамкнутым ротором.
Схема прямого подключения к сети представлена на рисунке 5. Пуск осуществляется при полном напряжении и постоянной частоте сети. Электродвигатель развивает высокий пусковой момент при коротком времени разгона.
Типичные области применения – маломощные электродвигатели, в том числе с пуском при полной нагрузке.
Однако, наряду с преимуществами имеются и определенные недостатки, например, бросок пускового тока, достигающий в первоначальный момент 10…12-кратного значения от номинального тока электродвигателя. Затем ток двигателя уменьшается примерно до 6…8-кратного значения номинального тока и будет держаться на этом уровне до тех пор, пока скорость двигателя не достигнет максимального значения.
Такое изменение тока оказывает значительное электродинамическое воздействие на кабель, подключенный к двигателю. Кроме того пусковой ток воздействует на обмотки двигателя. Высокий начальный пусковой момент может привести к значительному ускорению и следовательно к значительной нагрузке элементов привода (ремней, крепления узлов), что вызывает сокращение их срока службы.
И, наконец, следует принять во внимание возможное возникновение проблем, связанных с падением напряжения в линии питания двигателя и подключенного к этой линии оборудования.
[Перевод Интент]
Тематики
Синонимы
EN
- across-the-line starting (US)
- direct line starting
- direct operation of a motor
- direct starting
- direct-on-line starting
- DOL
- full voltage starter application
DE
FR
Русско-английский словарь нормативно-технической терминологии > прямой пуск вращающегося электродвигателя
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