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Diester (dibasic acid ester)
| Глоссарий терминов смазочных материалов |
A synthetic lubricant formed by reacting dicarboxylic acid with an alcohol, having high viscosity index and low volatility. with additives, it finds service in compressors, internal combustion engines and fluid power systems.
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Volatility, английский
- The degree of price fluctuation for a given asset, rate, or index; usually expressed as a variance or standard deviation.
- A statistical measure of the tendency of a market price or yield to vary over time.
- Волатильность, относительная скорость, с которой цена перемещается вверх и вниз; мера степени изменений рыночной стоимости ценных бумаг, определяемая за период в 52 недели (12 месяцев) и измеряемая в процентах. для того чтобы измерить волатильность, нужно
- This property describes the degree and rate at which a liquid will vaporize under given conditions of temperature and pressure. when liquid stability changes, this property is often reduced in value.
- Относительная скорость, с которой цена перемещается вверх и вниз. вычисляется годовое среднеквадратичное отклонение ежедневного изменения цены.
- Property of having a low boiling point or temperature of sublimation at normal pressure. likewise, having a high vapor pressure at ambient conditions.
- A measure of risk based on the standard deviation of the asset return. volatility is a variable that appears in option pricing formulas, where it denotes the volatility of the underlying asset return from now to the expiration of the option. there are volatility indexes. such as a scale of 1-9; a higher rating means higher risk.
- Нестабильность
- Describes how easily a substance will vaporize (turn into a gas or vapor).
- The property of a liquid that defines its evaporation characteristics. of two liquids, the more volatile will boil at a lower temperature and will evaporate faster when both liquids are at the same temperature. the volatility of petroleum products can be evaluated by tests for flash point, vapor pressure, distillation and evaporation rate.
Compressors, английский
Combustion, английский
- Сгорание; горение
- Горение, сожжение
- Any chemical process that produces light and heat as either glow or flames.
- Burning, &c. (see spontaneous combustion.)
- Сгорание, сжигание, горение, возгорание
- Сгорание. химическая реакция, при: которой вещество соединяется с кислородом с выделением тепла: «горение». сгорание топлива, содержащего углерод и водород, считается полным, если цроисходит полное окисление этих двух элементов до углекислого газа и воды. неполное сгорание может привести к тому, что: 1) в золе остается значительное количество углерода; 2) часть углерода выделяется в виде окиси углерода; и 3) молекулы топлива реагируют с образованием ряда продуктов более сложного состава по сравнению с исходными молекулами топлива, и если эти продукты не сгорают, они выделяются в виде дыма. сгорание летучих продуктов может протекать более полно, если сверху на слой топлива подается так называемый вторичный воздух (воздух, пропускаемый через слой топлива, называется «первичным»). воздух сверх количества, теоретически необходимого для полного сгорания (избыточный воздух), следует подавать с минимальным избытком, чтобы` избежать неоправданных потерь тепла с дымовыми газами, слабой теплопередачи и окисления двуокиси серы в трехокись. перенасыщенное сгорание происходит в системе, где топливо подается сверху на раскаленный слой топлива. такая система характеризуется тенденцией к образованию дыма. тороидальное (кольцевое) сгорание происходит в системе, где в печи поддерживается вихревой поток; это увеличивает время пребывания топлива в печи и настолько улучшает горение, что дополнительной подачи воздуха, требуется мало или не требуется совсем. 40
- A combustion reaction involves a substance combining with an oxidizer, releasing a large amount of heat (exothermic) and produces a flame. the heat produced can make combustion self-sustaining. an oxidizer is a compound that takes electrons in a reaction and can promote or initiate combustion. oxygen and chlorine are examples of oxidizers. when oxygen is available in sufficient amounts, complete combustion occurs. if a hydrocarbon undergoes complete combustion, carbon dioxide and water vapor are produced. combustion reactions can be oxygen starved or can involve excess oxygen. in an oxygen starved combustion reaction, a combustion reaction has a limited oxygen supply and incomplete combustion occurs. in an environment of combustion in excess air, the amount of oxygen supplied to the combustion reaction is more than is needed for complete combustion and can lead to a hotter, faster burning fire.
- A chemical process of oxidation that occurs at a rate fast enough to produce heat and usually light in the form of either a glow or flame.
- The chemical process of oxidation that occurs at a rate fast enough to produce heat and usually light in the form of either a glow or flame.
Compressor, английский
- Compresseur;surpresseur
- A mechanical device that pressurizes a gas in order to turn it into a liquid, thereby allowing heat to be removed or added. a compressor is the main component of conventional heat pumps and air conditioners. in an air conditioning system, the compressor n
- Part of a split-system heat pump or air conditioner’s outdoor unit that controls the pressure applied to the refrigerant so that it can circulate. it plays a vital role in taking in heat to warm your home with a heat pump or getting rid of heat to keep yo
- In an air conditioner this is known as
- The compressor plays an integral role in cooling your home. it is the device responsible for pumping refrigerant through the refrigerant lines and the coil, making the transfer of heat from inside your house to the outdoors possible. rheem uses high-quali
- A device which converts mechanical force and motion into pneumatic fluid power.
- Компрессор
- A machine for compressing air or other gases which is a basic component in some refrigeration systems; draws vaporized refrigerant from the evaporator at a relatively low pressure, compresses it, and then discharges it to a condenser. compressor-type liquid chiller equipment utilizing a compressor, condensor, evaporator, controls, and accessories to cool water or other secondary liquid. compression coupling compression faucet
- A mechanism generally adopted afloat for facilitating the working of the large guns recently introduced; the gun-carriage is thus compressed to its slide or platform during the recoil, and set free again by the turn of a handle for running up. it is of various forms; one of the simpler kind used to be always applied to carronade slides.
- Система сжатия данных; компрессор
- A signal processor that reduces dynamic range by using automatic volume control. also, an amplifier whose gain decreases as the input signal level increases above a pre-set point.
- An air pump, usually electrically driven, which supplies air under pressure (generally between 90 and 140 psi) for use on trains. brakes, doors and other items of equipment like suspension and whistles commonly require compressed air. compressors may be driven directly off a diesel engine or from an electrical supply on the locomotive or train. see the brakes page for more details.
- An engine that is used to increase natural gas pressure so that it can more easily flow through the pipeline.
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Differential (chassis), английский
A set or train of gears that change the direction of the vehicle propeller shaft to that of the axle shafts; also adjusts the amount of rotation between the right and left wheels on a particular driven axle to prevent wheel skidding when turning a corner.
Diametral pitch (gears), английский
Sometimes simply called “pitch”; the measure of tooth size, equal to the number of teeth divided by the pitch diameter. mating gears have the same diametral pitch. dielectric strength (astm d-877): measures the capacity of an insulating material to withstand electric stress (voltage) without failure. fluids with high dielectric strength (usually expressed in kv) are good electrical insulators.
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