SU991201A1

SU991201A1 - Pressure pickup

Info

Publication number: SU991201A1
Application number: SU802991025A
Authority: SU
Inventors: Юрий Васильевич Коновалов; Асхат Гусманович Мустафин; Борис Анатольевич Попов; Александр Трофимович Редченков; Юрий Александрович Тепанов
Original assignee: Предприятие П/Я Р-6456
Priority date: 1980-10-13
Filing date: 1980-10-13
Publication date: 1983-01-23

Description

Изобретение относится к авиационному. приборостроению и может быть использовано при разработке измерительных устройств (указателей, датчиков и сигнализаторов скорости летательных аппаратов ).The invention relates to aviation. instrument engineering and can be used in the development of measuring devices (pointers, sensors and signaling devices for aircraft speed).

Известны дифференциальные преобразователи разности давлений, содержащие две встречно размещенные двухмембранные коробки с неподвижными центрами, закрепленными в корпусе, жестко скрепленные между собой общим подвижным центром, кинематически соединенным с преобразователем его перемещения С1 3.Known differential pressure differential transducers containing two counter-placed two-diaphragm boxes with fixed centers fixed in the housing, rigidly fastened together by a common moving center kinematically connected to the transducer of its movement C1 3.

Существенным недостатком этих преобразователей является наличие двух конструктивно разнесенных в разные стороны двухмембранных коробок, что не позволяет получить компактную конструкцию.A significant drawback of these transducers is the presence of two structurally spaced diaphragm boxes in different directions, which does not allow to obtain a compact design.

Наиболее близким по технической сущности к предлагаемому является датчик давления,содержащий две встречно размещенные мембраны, закрепленные в корпусе по бурту, жестко скрепленные между собой общим подвижным центром, кинематически соединенным с преобразователем его перемещения.The closest in technical essence to the proposed one is a pressure sensor containing two opposed membranes, fixed in the housing along the shoulder, rigidly fastened together by a common moving center kinematically connected to the transducer of its movement.

Использование одиночных мембран, скрепленных с корпусом по бурту, позволяет частично уменьшить габариты §’ дифференциального датчика разности давлений [2 ).The use of single membranes fastened to the housing along the shoulder allows to partially reduce the dimensions of the § ’differential pressure differential sensor [2).

Существенным недостатком этого датчика является наличие двух конструктивно разнесенных в разные стороны IQ одиночных мембран и расположенного между ними узла сборного подвижного центра, состоящего иэ центров мембран и скрепляющей их резьбовой втулки, габариты которых в направлении общей оси центров определяют расстояние '5 между мембрана*®, или объем практи-чески неиспользуемый, что, в совокупности, не позволяет получить компактную конструкцию.A significant drawback of this sensor is the presence of two single membranes structurally spaced on different sides of IQ and an assembled movable center assembly located between them, consisting of the centers of the membranes and the threaded sleeve fastening them, whose dimensions in the direction of the common axis of the centers determine the distance '5 between the membrane * ®, or the volume is practically unused, which, in aggregate, does not allow to obtain a compact design.

__ Целью изобретения является умень^υ шение габаритов датчика.__ object of the invention is the ability ^υ shenie sensor dimensions.

Эта цель достигается тем, что дифференциальный датчик давления, содержащий две встречно размещенные гофрированные мембраны с жестким 75 центром, штуцера для подвода давления и преобразователь перемещения, снабжен упругим разделителем сред, размещенным между мембранами и герметично скрепленным с ними, по их буртику, 30 к которому жестко прикреплен введен3 ный в датчик подвижный центр, связанный с преобразователем перемещения,при этом жесткие центры 'неподвижно закреплены с помощью введенной в датчик скобы и в них выполнены каналы, к' которым подсоединены штуцеры . 5 для подвода давления.This goal is achieved by the fact that the differential pressure sensor, containing two counter-mounted corrugated membranes with a rigid 75 center, pressure fittings and a displacement transducer, is equipped with an elastic media separator located between the membranes and sealed to them along their shoulder 30 to which the movable center introduced into the sensor is rigidly attached and connected to the displacement transducer, while the rigid centers are fixedly fixed by means of the bracket inserted into the sensor and channels are made into them, to which m are connected fittings. 5 for pressure supply.

На чертеже представлена конструкция дифференциального датчика давления.The drawing shows the design of a differential pressure sensor.

Преобразователь содержит две |θ встречно размещенные гофрированные мембраны 1 и 2, скрепленные между собой по бурту 3 в коробку через разделитель 4, выполненный в виде гофрированной или плоской мембраны, ts разделяющей коробку на две полости А и В. Мембраны 1 и 2 неподвижными жесткими центрами 5 и б·, к которым через. трубопроводы 7 и 8 подводятся Сравниваемые давления Р_л и жестко' закреплены в скобе 9. С подвижным буртСм 3 жестко скреплен подвижный ₍центр 10, посредством которого осуществляется связь с преобразователем перемещен ия 11.The transducer contains two | θ opposed corrugated membranes 1 and 2, fastened together by a collar 3 into a box through a separator 4, made in the form of a corrugated or flat membrane, ts dividing the box into two cavities A and B. Membranes 1 and 2 with fixed rigid centers 5 and b · to which through. pipelines 7 and 8 are brought in. Comparable pressures P _l and rigidly fixed in the bracket 9. Movable collar 3 is rigidly fixed to the movable collar 3 ₍ center 10, through which communication with the transducer 11 is carried out.

Преобразователь работает следующим 25 образом.The converter operates as follows 25.

При равенстве давлений Р^=Р^ в полостях А и Б преобразователя и, естественно, эффективных площадей ® Sj мембран 1 и 2 бурт 3 коробки 30 остается неподвижным. При наличии разницы давлений, например, йР = Р_и—Р_|1гв полостях возникает сила Е» Д Р · S, перемещающая бурт 2 и жестко скреп'Ленный с ним центр 10 в сторону мень-35 шего давления. Здесь S - эффективная площадь манометрической коробки, образованной мембраной 1 и разделителем 3, герметично скрепленными по бурту (или мембраной 2 и разделите- дд лем 3, в случае ДР = Р₂—P-j ).If the pressures P ^ = P ^ in the cavities A and B of the transducer are equal and, naturally, the effective areas ® Sj of the membranes 1 and 2 of the shoulder 3 of the box 30 remain stationary. In the presence of a pressure difference, for example, pP = P _and -P _{| 1r} , a force E »D P · S arises in the cavities, moving the collar 2 and the center 10 rigidly fastened with it to the side of lower pressure. Here S is the effective area of the pressure gauge box formed by the membrane 1 and the separator 3, hermetically fastened along the shoulder (or the membrane 2 and the separator 2, in the case of DR = P2 _- Pj).

Перемещение центра 10, пропорцио'нальное разности давлений дР, преобразуется, например, либо в пропорциональный электрический сигнал, либо в показания стрелочного индикатора.The displacement of the center 10, which is proportional to the pressure difference dR, is converted, for example, either into a proportional electric signal or into the readings of a dial indicator.

Таким образом, наличие одной коробки вместо двух, разнесенных в разные стороны., а также осуществление кинематической связи с преобразователем перемещения через боковой подвижный бурт коробки, жестко связанный с подвижным центром, позволяют значитепьно уменьшить габариты датчика по высоте и получить компактную конструкцию устройства.Thus, the presence of one box instead of two spaced apart., As well as the implementation of kinematic communication with the displacement transducer through the lateral movable collar of the box, rigidly connected to the movable center, can significantly reduce the height of the sensor and obtain a compact device design.

Claims

The invention relates to aviation. PEMBOR-BUILDING and can be used in the development of measuring devices (pointers, sensors and airspeed detectors). Differential differential pressure transducers are known, containing two oppositely placed two-membrane boxes with fixed / 1 centers fixed in the housing, rigidly fastened together by a common moving center, kinematically connected with the transducer of its displacement C 1.3. A significant disadvantage of these converters is the presence of two structurally spaced two-membrane boxes, which do not allow for a compact design. The closest in technical essence to the proposed method is a pressure sensor. It contains two mutually placed membranes, fixed in the housing along the shoulder, rigidly fastened together by a common moving center, kinematically connected to the transducer of its movement. The use of single membranes fastened to the housing along the collar partially reduces the dimensions of the differential pressure difference sensor t b. A significant disadvantage of this sensor is the presence of two structurally spaced single membranes and an assembly of movable center consisting of the centers of the membranes located between them. and fastening them to the threaded sleeve, the dimensions of which in the direction of the axle & center axis determine the distance between the membrane 1 B1, or the amount of practically unused, that, aggregate, does not permit a compact design. The aim of the invention is to reduce the size of the sensor. This goal is achieved by the fact that a differential pressure sensor, containing; above counter-mounted corrugated membranes with a rigid center, a pressure fitting and a displacement transducer, is provided with an elastic media separator placed between the diaphragms and sealed to them along the shoulder; rigidly attached to the sensor moving center associated with the displacement transducer (with rigid centers | fixedly fixed by means of the clip inserted into the sensor and in which the channels K m nozzles connected to the pressure supply. The drawing shows the design of a differential pressure sensor. The converter contains two oppositely placed corrugated membranes 1 and 2, fastened between one another along the collar 3 into the box through a divider 4, made in the form of a corrugated or flat membrane dividing the box into two cavities A and B. The membranes 1 and 2 are fixed centers 5 and b, to which the equalized pressures P and P2 are rigidly fixed in the clamp 9 through pipelines 7 and 8. With a movable; shoulder 3m 3, the movable center 10 is rigidly fastened by means of which communication with the displacement transducer li is carried out. The converter works as follows. With equal pressures, in the cavities A and B of the converter and, naturally, the effective areas S $ 2 of the membranes 1 and 2 of the collar 3 of the box remain stationary. In the presence of pressure ratios, for example, LR in the cavities, a force F a P S arises, moving the collar 2 and the center 10 rigidly fastened with it towards the lower pressure. Here S is the effective area of the manometric box formed by the membrane 1 and the separator 3, hermetically fastened along the collar (or membrane 2 and the separator 3, in the case of rR RZ-R-). proportional electrical signal, or in the indication of the dial gauge. Thus, the presence of one box instead of two, spaced apart, as well as the implementation of a kinematic connection with a transducer of movement through a side podzhizhny burt box rigidly connected with a moving center, allows you to reduce the size of the sensor in height and get a compact design devices. Claims; A pressure sensor containing two opposing corrugated membranes with a rigid center, pressure fittings and a displacement transducer, characterized in that, in order to reduce overall dimensions, it is equipped with an elastic media separator placed between the membranes and sealed to them along their collar, to which the mobile center inserted into the sensor, connected to the displacement transducer, is rigidly attached, while the rigid centers are fixedly fixed / by means of the clip inserted into the sensor and in which channels are made, to A pressure connection nipple is connected. Sources of information taken into account in the examination 1. German Patent No. 583502, cl. 42e 23/20, 1933. 2 ,. Ageikin D.I. et al. Sensors of control and regulation, M., 1965, p. 606 (prototype) ..