SU868112A1

SU868112A1 - Heat drive

Info

Publication number: SU868112A1
Application number: SU792852160A
Authority: SU
Inventors: Виктор Георгиевич Абрамов; Игорь Владимирович Бармин; Александр Федорович Драенков; Александр Викторович Егоров; Александр Федорович Иванов; Борис Александрович Карпов; Сергей Владимирович Осокин; Юрий Федорович Сергеев; Игорь Гаврилович Филатов; Виктор Васильевич Филиппов
Original assignee: Предприятие П/Я А-7731
Priority date: 1979-12-17
Filing date: 1979-12-17
Publication date: 1981-09-30

Description

(54) ТЕПЛОВОЙ ПРИВОД(54) THERMAL ACTUATOR

II

Изобретение относитс к машиностроению , касаетс тепловых приводов и может найти применение в различных отрасл х народного хоз йства в исполнительных механизмах .FIELD OF THE INVENTION The invention relates to mechanical engineering, relates to heat drives, and may find application in various branches of the national economy in actuators.

Известен тепловой привод, содержащий корпус, в котором выполнена рабоча камера , заполненна термочувствительной средой и снабженна нагревательным элементом, подключенным к блоку электропитани , и поршнем, св занным с выходным звеном 1.A heat actuator is known, comprising a housing in which a working chamber is made, filled with a temperature-sensitive medium and provided with a heating element connected to the power supply unit and a piston connected with the output link 1.

Недостатком известного теплового привода вл етс неравномерность перемещени выходного звена вследствие изменени теплового баланса привода с окружающей средой при повышении температуры термочувствительной среды.A disadvantage of the known thermal drive is the uneven movement of the output link due to the change in the thermal balance of the drive with the environment when the temperature of the heat-sensitive medium increases.

Цель изобретени - обеспечение равномерного перемещени выходного звена.The purpose of the invention is to ensure uniform displacement of the output link.

Дл достижени указанной цели привод дополнительно снабжен кожухом с теплоизолирующим покрытием на его наружной поверхности, дополнительным нагревательным элементом, расположенным между покрытием и кожухом и подключенным к блоку электропитани через дополнительно установленный регул тор напр жени , и механизмом фиксации поршн в исходном положении , причем корпус рабочей камеры размещен с зазором внутри кожуха, а на внутренней поверхности последнего и на наружной поверхности корпуса установлены датчики температуры, подключенные к управл ющему входу регул тора напр жени .To achieve this goal, the drive is additionally equipped with a casing with a heat insulating coating on its outer surface, an additional heating element located between the cover and the casing and connected to the power supply unit through an additionally installed voltage regulator, and a piston fixing mechanism in the initial position, the working chamber housing placed with a gap inside the casing, and temperature sensors are installed on the inner surface of the latter and on the outer surface of the case; to the control input of the voltage regulator.

-Кроме того, в кожухе установлен вентил тор , выход которого сообщен с зазором между кожухом и корпусом;- In addition, a fan is installed in the casing, the output of which is connected with the gap between the casing and the housing;

На чертеже показано предлагаемое устройство ,The drawing shows the proposed device

10ten

В корпусе 1 привода выполнена рабоча камера 2, заполненна термочувствительной средой и снабженна нагревательным элементом 3, подключенным к блоку электропитани (не показан). В камере 2 установлен поршень 4, св занный с выходным звеном 5 гидроприводом поступательного движени , образованным поршн ми 6 и 7 и гидролинией 8. Привод дополнительно снабжен кожухом 9 с теплоизолирующим покрытием 10 на его наружной поверхности и In the drive housing 1, a working chamber 2 is made, filled with a temperature-sensitive medium and provided with a heating element 3 connected to a power supply unit (not shown). The chamber 2 is fitted with a piston 4 connected to the output link 5 by means of a hydraulic actuating movement formed by the pistons 6 and 7 and the hydraulic line 8. The drive is additionally equipped with a casing 9 with a heat insulating coating 10 on its outer surface and

Claims

20 by an additional heating element 11 located between the cover 10 and the casing 9 and connected to the power supply unit through an additionally installed voltage regulator (not shown). In addition, the drive is provided with a mechanism for fixing the piston 4 in the initial position, made in the form of a ball retainer 12 with a control rod 13 connected with a bellows 14 filled with gas. On the control, I eat the rod 13 is made annular groove 15 under the retainer balls 12. The bellows 14 is installed in the working chamber 2 of the drive. The housing 1 is stirred, with a gap inside the housing 9, and temperature sensors 16 and 17 are connected to the control input of the voltage regulator on the inner surface of the latter and on the outer surface of the housing 1. A fan 18 is installed in the casing 9, the output of which is in communication with the gap between the casing 9 and the casing 1. When the voltage is applied to the heating element 3, the temperature-sensitive medium in the working chamber 2 heats and expands. The expansion of the heat-sensitive environment is proportional to its temperature. Expanding the temperature-sensitive medium compresses the bellows 14, which does not have a control rod 13. Once the groove 15 of the rod 13 is aligned with the ball lock 12, the balls release the piston 4, which begins to move and transmits movement through the pistons 6 and 7 of the hydraulic drive to the output link 5. In order to ensure uniform motion of the output element with a constant voltage across the heating element 3, it is necessary that the temperature difference between the housing 1 and the casing 9 remains constant. At the same time, the heat radiation will be constant nor to the environment. The temperature difference between the housing 1 and the housing 9 is supported by an additional heating element 11, which is connected to the power supply unit via a voltage regulator controlled from temperature sensors 16 and 17. With increasing temperature difference. fixed by sensors 16 and 17, respectively, the voltage on the additional heating element 11 increases and the heating intensity of the housing 9 increases. When the temperature difference between housing I and the housing 9 decreases, the voltage on the additional heating heating decreases and the intensity of heating of the housing 9 decreases. To return the actuator to its original position, turn off the power supply to the heating elements 3 and 11 and turn on the fan 18, which injects cold air into the gap between the casing 9 and the casing 1 and contributes to the rapid cooling of the heat-sensitive environment, the casing 1 and the casing 9. Thus, by installing outside the casing 1 of the casing 9 with an additional heating element 11 controlled by the temperature difference between the casing 1 and the casing 9, the heat radiation into the environment is ensured and the thermal expansion is even environment in the working chamber 2 at a constant voltage on the heating element 3. Accordingly, the uniformity of movement of the output link 5 is achieved. At the same time, the use of a clamp eliminates the movement of the output link until the working pressure is reached at chamber 2 and minimizes the transition period 5 of a given speed of movement, i.e. also provides an increase in the uniformity of its movement. Claim 1. Thermal actuator, comprising a housing in which a working chamber is made, filled with a heat-sensitive medium and provided with a heating element connected to the power supply unit, and a piston connected with the output section 1, characterized in that in order to ensure uniform displacement of the output link. the drive is additionally equipped with a casing With a heat insulating coating on its outer surface, an additional heating element located between the coating and the casing and connected to the power supply unit through an additionally installed voltage regulator, and a piston fixing mechanism in the initial position the casing, and on the inner surface of the latter and on the outer surface of the casing, temperature sensors are installed, connected to the control input of the controller ora voltage.

2. The actuator according to claim 1, characterized in that a fan is installed in the casing, the output of which is in communication with the gap between the casing and the housing. Sources of information taken into account in the examination 1. US patent No. 3805528, cl. 60-530, 1974.