SU836438A1

SU836438A1 - Pneumohydraulic drive

Info

Publication number: SU836438A1
Application number: SU752094306A
Authority: SU
Inventors: Александр Иосифович Свердлов; Борис Федорович Трофимов; Галина Георгиевна Гришенина
Original assignee: Предприятие П/Я А-7899
Priority date: 1975-01-07
Filing date: 1975-01-07
Publication date: 1981-06-07

Description

1one

Изобретение относитс к пневмогидроприводам , которые позвол ют автоматизировать управление механизмами и устройствами современных эне гетических, нефтеперерабатываютцих, химических и иных предпри тий; может быть использовано, например, в трубопроводной арматуре, когда необходимо зафиксировать затвор арматуры в положени х открыто или закрыто , обеспечива при этом необходимое дл герметичности затвора усилие по штоку в течение продолжительного времени. Явл етс усовершенствованием пневмогидропривода по авт. св. № 335490.The invention relates to pneumohydraulic actuators that allow automating the control of the mechanisms and devices of modern energy, oil refineries, chemical and other enterprises; can be used, for example, in pipe fittings, when it is necessary to lock the valve in the open or closed position, while providing the stem force required for the tightness of the valve for an extended period of time. It is an improvement of pneumo-hydraulic actuator according to ed. St. No. 335490.

Известен пневмогидропривод, в цилиндре которого размещен фиксируемый сухар ми поршень, св занный с запорнь1м органом штоком, причем основани цилиндра и штока соединены пружинами с поршнем, в котором телескопически размещен вспомогательный поршень взаимодействующий с сухар ми 1.A pneumohydraulic actuator is known in which a piston fixed by a dry nut and connected to the stem by a stem is placed in a cylinder, the bases of the cylinder and the stem are connected by springs to a piston in which a secondary piston 1 is telescopically located.

Недостатком известного привода вл етс переменна пломадь контакта между рабочими внутреннимиторцами сухарей и поверхностью вспомогательного поршн , что уху.1даает надежность привода из-за больших контактных напр жений.The disadvantage of the known actuator is the variable contact contact between the working internal diets of the rusks and the surface of the auxiliary piston, which also means the reliability of the actuator due to large contact voltages.

Целью изобретени вл етс повышение надежности и долговечности привода за счет уменьшени контактных напр жений.The aim of the invention is to increase the reliability and durability of the drive by reducing the contact voltages.

Указанна цель достигаетс тем, что внутренние торцы сухарей выполнены плоскими, а на наружных цилинд0 рических поверхност х вспомогательного поршн выполнены лыски дл взаимодействи с указанными торцами сухарей .This goal is achieved by the fact that the inner ends of the crackers are made flat, and on the outer cylindrical surfaces of the auxiliary piston are made flats for interaction with the indicated ends of the crackers.

5На фиг. 1 изоражен общий вид5 FIG. 1 is a general view

пневмогидропривода; на фиг. 2 - разрез А-А фиг. 1; на фиг. 3 - разрез Б-Б фиг. 1.pneumohydraulic drive; in fig. 2 - section A-A of FIG. one; in fig. 3 - section bb FIG. one.

В цилиндре 1 расположен поршеньIn the cylinder 1 is a piston

0 2, внутри которого помещен вспомогательный поршень 3, выталкиваюн й сухари 4.0 2, inside of which is placed the auxiliary piston 3, the ejected crumbs 4.

Пружина 5, упира сь в основание 6 цилиндра , фиксирует поршень 2,The spring 5, resting against the base 6 of the cylinder, fixes the piston 2,

5 а с ним и шток 3, св занный с запорным органом (на чертеже не показан), в верхнем положении. С помощью пружины 8 ос тцествл етс упруга св зь поршн 2 со штоком 7. Фикcиp oIДиe5 and with it the rod 3, connected with the locking member (not shown in the drawing), is in the upper position. By means of a spring 8, the elastic connection of the piston 2 with the rod 7 is fixed. Fixation oIDi

Claims

0 crackers 4 are set in the piston grooves

2. The plate 9 connects the piston 2 to the rod 7. The inner ends 10 of the crackers 4 are flat, and on the outer cylindrical surfaces 11 and 12 of the auxiliary piston 3 are flats 13 and 14 for interaction we with the ends of the 10 crackers 4, the cylinder 1 has cavities 15 and 16. Pnevmogidroprivod works as follows. .Under the pressure of the control medium supplied to the actuator cavity 15, then the pins 2 and 3 move, and the rod moves along with the action of the spring 8. As soon as the crackers 4 moving with the piston 2 along the surface 11 of the auxiliary piston 3, go beyond cylinder 1, and porien 3 will push it out. they will be fixed in this position. In the case of depressurization of the control medium from the cavity .15, the piston. 2 will not be able to return to the original application due to the extended crackers 4y which are fixed in this position by the piston 3. When the control medium is fed into the cavity 16 of the cylinder 1, the auxiliary piston 3 moves upwards and allows the crackers 4 to go off the bevel of cylinder 1 Providing the ability to move the piston 2, and with it the rod 3 through the bar 9, the piston 2 and the rod 3 is fixed, in the upper position when the pressure is released from the lower cavity 16 by the spring 5. Performing the flats 13 and 14 increases the contact area of the crackers 4 and the auxiliary piston

3. Formula of the invention St. No. 335490, characterized in that, in order to increase the reliability and durability of the drive by reducing contact stresses, the inner ends of the crackers are made flat, and on the outer cylindrical surfaces of the auxiliary piston are made flats for interaction with the indicated ends of the crackers. Sources of information taken into account in the examination 1, USSR Author's Certificate No. 335490, cl. F 16 B 35/04, 1970 (prototype),. /