SU1000832A1

SU1000832A1 - Sampling device

Info

Publication number: SU1000832A1
Application number: SU813348912A
Authority: SU
Inventors: Николай Евгеньевич Амбарцумов; Татьяна Георгиевна Монюшко; Виктор Борисович Гололобов
Original assignee: Предприятие П/Я А-3513
Priority date: 1981-10-23
Filing date: 1981-10-23
Publication date: 1983-02-28

Description

Изобретение относится к устройствам] обеспечивающим контроль процесса распыления жидкого топлива, и может быть использовано для определения дисперсных характеристик форсунок различных типов.The invention relates to devices] providing control of the process of spraying liquid fuel, and can be used to determine the dispersed characteristics of nozzles of various types.

Известно пробоотборире устройство, ⁵включающее корпус с шелеобразным отверстием, поперечное сечение корпуса, выполнено в виде координаты, длина щелеобразного отверстия равна длине кор- ₍₀цуса, внешняя кромка корпуса выполнена в виде желоба, а лобовая сторона корпуса снабжена установленным на ней сетчатым дефлегматором £.1^ .It is known to sample a device ⁵ including a housing with a helical hole, the cross section of the housing made in the form of a coordinate, the length of the slotted hole is equal to the length of the core ₍₀ cm, the outer edge of the housing is made in the form of a groove, and the front side of the housing is equipped with a mesh reflux condenser mounted on it £ .1 ^.

Недостатком устройства является низ-_t5кая достоверность отбираемых проб в высокоскоростном газожидкостном потоке.A disadvantage of the device is the low _t5 reliability of the samples taken in the high-speed gas-liquid flow.

Известно пробоотборное устройство, содержащее корпус в виде обечайки с окнами, затвор, представляющий из себя 20 пустотелый цилиндр с прорезью, имеющий привод, и индикаторную пластинку, установленную внутри пробоотборника. Наличие защитной обечайки с окнами и ’ затвора с приводом позволяет подобрать время срабатывания затвора таким обра зом, чтобы исключить влияние газового потока на отобранную пробу ^2 J .A sampling device is known that comprises a shell in the form of a shell with windows, a shutter, which is a 20 hollow cylinder with a slot, having a drive, and an indicator plate mounted inside the sampler. The presence of a protective shell with windows and a ’shutter with an actuator allows one to choose the shutter response time in such a way as to exclude the influence of gas flow on the selected sample ^ 2 J.

Однако, как показывает опыт работы с подобного типа пробоотборниками при улавливании капель жидкости из воздушного потока, практически очень трудно получить представительную пробу. Это связано с тем, что при достаточно больших скоростях воздушного потока, при очень малом времени срабатывания затвора (порядка 1/100 с и менее) отбирается недостаточное количество капель, а при увеличении времени срабатывания воздушный поток начинает сдувать капли с индикаторной пластинки. Кроме того, наименьшее влияние конструкции затвора на пробу имеет место при центральном, а не шторчатом затворе.However, as experience with this type of sampler shows when capturing liquid droplets from the air stream, it is practically very difficult to obtain a representative sample. This is due to the fact that at sufficiently high air flow rates, with a very short shutter response time (of the order of 1/100 s or less), an insufficient number of drops is selected, and with an increase in the response time, the air flow begins to blow off drops from the indicator plate. In addition, the smallest effect of the shutter design on the sample occurs with a central shutter rather than a shutter.

Цель изобретения - повышение качества отбора и представительности пробы, а также обеспечение возможности отбораThe purpose of the invention is to improve the quality of sampling and representativeness of the sample, as well as providing sampling

1000832 4 проб из газожидкостного высокоскоростного потока.1000832 4 samples from a gas-liquid high-speed stream.

Указанная цель достигается тем, что в пробоотборном устройстве, содержащем корпус с установленной в нем индикатор- g ной пластинкой и затвором с приводом, затвор выполнен в виде двух встречно и синхронно вращающихся на одной оси конусов, при этом на боковой поверхности каждого конуса выполнено по сквоз- 10 ному отверстию, центры которых расположены на одинаковом расстоянии от оси вращения конусов затвора.This goal is achieved by the fact that in a sampling device containing a housing with an indicator plate g mounted in it and a shutter with an actuator, the shutter is made in the form of two cones in the opposite direction and synchronously rotating on the same axis, while on the side surface of each cone it is made through - 10 hole, the centers of which are located at the same distance from the axis of rotation of the shutter cones.

Целесообразно затвор снабдить последовательно и соосно установленными над 15 ним двумя усеченными конусами с открытым выходом в основаниях, при этом их ось проходит через окружность,на которой расположены центры отверстий затвора.It is advisable to provide the shutter with two truncated cones with an open exit in the bases sequentially and coaxially mounted above it 15 with their axis passing through the circle on which the centers of the shutter openings are located.

' 20' 20

На фиг. 1 изображено пробоотборное устройство, общий вид; на фиг. 2 - вид А на фиг. 1.In FIG. 1 shows a sampling device, a General view; in FIG. 2 is a view A in FIG. 1.

Пробоотборное устройство содержит корпус 1, в котором установлена съем- ₂₅ная индикаторная пластинка 2 с нанесенным слоем смазки. Над пластинкой выполнен затвор 3, представляющий из себя два конуса с отверстиями 4 и привод 5 срабатывания, В корпусе, над затвором, установлены , последовательно на одной оси два усеченных конуса 6 таким образом,' что их ось проходит через точку окружности, по которой перемещаются центры отверстий затвора 3.The sample acquiring device comprises a body 1 in which is installed a removable indicator ₂₅ Naja plate 2 coated with a layer of lubricant. A shutter 3 is made above the plate, consisting of two cones with holes 4 and a actuator 5 of operation. In the housing, above the shutter, two truncated cones 6 are mounted sequentially on the same axis so that their axis passes through the point of the circle along which they move centers of the shutter holes 3.

Перед отбором пробы пробоотборное устройство опытно или с помощью дополнительного устройства выставляется таким образом, чтобы ось конусов 6 совпадала с вектором скорости капель в данной точке потока или отклонялась от него не ⁴⁰более, чем на угол видения oL^ , При набегании двухфазного потока на пробоотборник газ, проходя последовательно первый и второй конус, тормозится за счет расширения внутри конусов и истекает через открытые основания, чему способствует эжектируклцее действие потока, обтекающего снаружи конуса. Конусы затвора 3 для синхронизации связаны тягами с движком, двигающимся по на- ⁵⁰правляюшей под действием пружины. После отрабатывания механизма спуска конусы затвора начинают вращаться навстречу друг другу. Капли’жидкости, попадая на коническую поверхность затвора, 55 скатываются по ней до момента совмещения отверстий, когда они осаждаются на индикаторную пластинку. Дальнейшее встречное вращение конуса уводит отверстая из совмещения, отсекая пробу капель. Подбор пружины различной жесткости позволяет подобрать нужное время срабатывания, хотя рабочий промежуток времени срабатывания расширяется за счет уменьшения влияния газового потока с помощью конусов. 6.Before sampling, the sampling device is experimentally or using an additional device set so that the axis of the cones 6 coincides with the droplet velocity vector at a given point in the flow or deviates from it no more than ⁴⁰ by an angle of view oL ^. When a two-phase flow is incident on the gas sampler passing sequentially the first and second cone, it is inhibited due to expansion inside the cones and expires through open bases, which is facilitated by the ejection effect of the stream flowing around the outside of the cone. The cones of the shutter 3 for synchronization are connected by rods with an engine moving along the ⁵⁰ direction under the action of the spring. After practicing the descent mechanism, the shutter cones begin to rotate towards each other. Drops of liquid, falling on the conical surface of the shutter, 55 roll along it until the holes are aligned when they are deposited on the indicator plate. Further counter rotation of the cone leads the hole out of alignment, cutting off the sample of drops. Selection of a spring of different stiffness allows you to choose the right response time, although the working interval of the response time is expanded by reducing the influence of the gas flow using cones. 6.

Форма окон (отверстий) в боковых^ поверхностях конусов затвора может быть различной, в зависимости от условий применения пробоотборного устройства.The shape of the windows (holes) in the lateral surfaces of the shutter cones may vary, depending on the conditions of use of the sampling device.

Технико-экономические преимущества состоят в том, что устройство позволяет получить качественные пробы капель жидкости, распыленной в высокоскоростном газовом потоке: отобрать пробы капель из распыленного факела паровых, паромеханических и пневматических форсунок при условии подачи пара или иммигирующего воздуха, также из потока воздуха при изучении распределения жидкого топлива в факелах горелочных устройств и жидкой фазы из потока воздуха различных охлаждающих и сепарационных устройств. Это значительно расширит диапазон исследования вопросов смесеобразования.Technical appraisal and economic advantages consist in the fact that the device allows to obtain high-quality samples of droplets of liquid sprayed in a high-speed gas stream: to take samples of drops from a sprayed torch of steam, steam-mechanical and pneumatic nozzles provided that steam or immigrant air is supplied, also from the air stream when studying the distribution liquid fuel in the torches of the burner devices and the liquid phase from the air stream of various cooling and separation devices. This will significantly expand the range of research on the issues of mixture formation.

Claims

The invention relates to devices that control the process of spraying a liquid fuel, and can be used to determine the dispersed characteristics of various types of nozzles. A device is known to sampler, a housing with a slit-like opening, the cross-section of the housing is in the form of a coordinate, the length of the slit-like opening is equal to the length of the corsus, the outer edge of the housing is filled in the form of a groove, and the front side of the housing is fitted to. her mesh reflux 1. The drawback of the device is the low reliability of the samples taken in the high-speed gas-liquid flow. A sampling device is known, comprising a shell-shaped case with windows, a shutter, which is a hollow cylinder with a slot, an actuator, and an indicator plate installed inside the sampler. The insertion of a protective shell with windows and a shutter with a drive makes it possible to select the shutter response time in such a way as to exclude the influence of the gas flow on the 2 T sample taken. However, as experience with samplers of this type shows when trapping liquid droplets from an air stream, it is practically very difficult to obtain a representative sample. This is due to the fact that at sufficiently high air flow rates, with a very short shutter response time (on the order of 1 / 1OO s and less), an insufficient number of drops is selected, and with an increase in running time. the air flow begins to blow off the drops from the indicator plate. In addition, the smallest effect of the gate design on the sample occurs when the central gate valve, not the curtain gate. The purpose of the invention is to demonstrate the quality of sampling and representativeness of the sample, as well as to ensure the possibility of sampling 310 samples from a gas-liquid high-speed flow. This circuit is achieved by the fact that, in a sampling device comprising a housing with an indicator plate installed in it and an actuator gate, the valve is formed as two oppositely and synchronously rotating cones on the same axis, while on the side surface of each cone there is a through-hole, centers which are located at the same distance from the axis of rotation of the gate cones. It is advisable to provide the shutter sequentially and coaxially mounted above it with two truncated cones with an open outlet at the bases, while their axis passes through a circle on which the centers of the shutter holes are located. FIG. 1 shows a sampling device, a general view; in fig. 2 is a view A of FIG. 1. The sampling device comprises a housing 1 in which a removable indicator plate 2 is installed with a layer of lubricant applied. Above the plate there is a shutter 3, which consists of two cones with holes 4 and a drive 5 of the srabatan. In the case, above the gate, installed. successively on the same axis, two truncated cones b so that their axis passes through the point of the circle along which the centers of the gate 3 move. Before sampling, the sampling device is experienced or using the ADDITIONAL device exposes the axis of the cones 6 droplet velocity vector at a given point of flow or deviated from it no more than at the angle of vision cL. When a two-phase flow rushes onto the sampler, the gas, passing the first and second cone in series, is inhibited due to p expansion inside the cones and expires through the open bases, which is facilitated by the ejection of the flow flowing around the outside of the cone. The cones of the shutter 3 for synchronization are connected with the engine, moving along the guide under the action of the spring. After the release mechanism is retracted, the shutter cones begin to rotate towards each other. The caps of the liquid, falling on the conical surface of the bolt, roll over it until the holes are aligned, when they are deposited on the shishkatorny plate. A further 2 counter rotation of the cone leads the branch out of the combination, sample compartment of the droplets. The selection of a spring of different stiffness permits the selection of the required response time, although the working time interval is relieved by reducing the influence of the gas flow with the help of cones. 6. The shape of the windows (openings) in the side surfaces of the gate cones may vary depending on the conditions of use of the sampling device. Technical and economic advantages are that the device allows to obtain high-quality samples of droplets of a liquid sprayed in a high-speed gas flow: take samples of droplets from a spray torch of steam, steam-mechanical and pneumatic nozzles, provided that steam or imitating air is supplied, also from air in the study of the distribution of liquid fuel in the flares of the burner devices and the liquid phase from the air flow of various cooling and separation devices. This will greatly expand the range of research on blending issues. Claim 1. A sampling device comprising a housing with an indicator plate installed therein and a drive gate, characterized in that, in order to improve the quality of selection and representativeness of the sample from a gas-liquid velocity flow, the gate is executed as two counter-rotating and synchronously rotating on one the axis of the cones, while on the side surface of each cone is made through a through hole, the centers of which are located at the same distance from the axis of rotation of the cones of the gate, 2, The device according to claim 1, 1 Now that the shutter is equipped with two truncated cones mounted coaxially above it with an open outlet at the bases, their axis passes through a circle on which the centers of the shutter holes are located. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 697861, cl. G-01 M 1/10, .1U7P.

2. Copyright certificate USSR No. 583382, cl. GO 1./1O, to 7.