SU964590A1 - Jet-type pressure regulator gate drive unit - Google Patents

Description

(5) KNOT OF DRIVE OF THE DRIVE GATE VALVE

PRESSURE

one

This invention relates to a jet hydraulic or pneumatic device for monitoring and regulating non-electrical parameters.

There are various designs of jet devices, containing elements such as a nozzle-flap with the movement of the flap along the axis El.

In devices with a rocking motion of a valve located in a nozzle Q chamber of the regulator, where pressure and the medium are different from others, the valve actuator assembly transmitting the latter movement, for example, from a sensing element that senses, 5 parameter (membrane, bellows, float, etc.), serves as a sealed media separator. Therefore, it includes an elastic rubber shaft sealer, a torsion tube, a rocking bellows 20 or other element that is elastically deformed when the shaft of the flap is rotated. The presence of such elements reduces the reliability and

resource characteristics of devices. The use of shielded magnetic couplings for transmitting motion to the valve shaft with provision of hermetic separation of cavities, the device improves reliability and resource characteristics, since there are no deformable parts. However, the reliability and accuracy of operation of the devices in this case is reduced due to the fact that the supports of the driven coupling half, rigidly connected to the gate shaft, operate in the medium filling the nozzle chamber of the regulator. Clogging and corrosion of the damper shaft supports leads to an increase in friction losses in them and, as a result, to instability and failures in the operation of the jet regulator.

Claims (2)

The closest in technical essence to the present invention is an inkjet pressure regulator, comprising a housing with a nozzle chamber, in which a damper is located, moving in a plane perpendicular to the axis of the nozzles, the damper shaft has dry knife supports. The shaft is sealed with a rubber seal. A bellows was used as a sensing element that perceives pressure and acts on the valve shaft. The disadvantage of the known [eegulator] is the low reliability and accuracy due to the design of the supports and the sealing of the valve shaft. The purpose of the invention is to increase the reliability and accuracy of the controller operation. This goal is achieved by the fact that in the drive unit of the valve of the jet pressure regulator, comprising a housing with a nozzle chamber, in which the nozzle valve connected to the deukhoporny shaft is located, the shaft is rigidly connected to the driven coupling half shielded magnetic coupling, leading the coupling half. through which the rod is connected to the manometric sensor element as one of the shaft supports placed in the wall of the housing restricting the nozzle chamber, the magnetic liquid support is used, and a through hole is made in the case The elastic and internal cavity of the magnetic coupling screen / in the hole is equipped with an elastic element, and the internal cavity of the screen is filled with a neutral liquid that is not mixed with the ferromagnetic liquid-magnetic-liquid support. The drawing shows in a simplified way the structure of the proposed unit for the drive of the gate of the jet pressure regulator,. - /:: The damper drive assembly contains a sensitive manometric element of the regulator - membrane 1, recognizing the difference between the controlled pressures P and P. Through the rod 2 it is connected to the master coupling half 3 of the shielded magnetic coupling, driven by the coupling half 4 which is located inside the shield 3, hermetically sealed with its face to the casing 6. Moreover, the screen and the casing are made of non-magnetic material. The half-coupling is rigidly mounted on the double-support shaft 7 of the valve 8, which rests on the standard bearing support 9 and the magnetic-liquid support placed in the wall of the housing 6, consisting of coaxially shaft 7 of the ring constant magnet 10, two-pole tips 11 and ferromagnetic fluid 12, the filling annular gap between the shaft, the magnet and the pole tips i. The damper .8 is placed in the nozzle chamber 13 and enters the gap between the ends of the inlet 1 and outlet 15 nozzles of the jet regulator. In the wall of the housing 6 ermetichno overlapped .elastichnym member (aperture) 16 opening 17 between the nozzle chamber 13 and the interior of the screen 5 which is filled via the opening 18 neutral liquid immiscible with the ferrofluid 12. The drive unit operates as follows. -. ; : Under the influence of the membrane 1 ved; The half coupling half rotates at a certain angle. Simultaneously with it, the driven coupling half k is turned together with the shaft 7 and the flap 8, which, by cutting the jet of the working medium G, which comes under the pressure Ррп to the nozzle 1, changes the pressure Pgbw of the nozzle output. 15. At the same time, the pressure of the RSD of the working medium in the nozzle chamber changes. 13. This alternating pressure in the Nozzle chamber acts through an elastic diaphragm 16 "and the neutral fluid fills the closed internal cavity of the screen .5. Due to the incompressibility of the neutral fluid, the pressure in it is constantly equal to the pressure in the Nozzle Chamber 13. Thus, the magnetoIdical support is not affected by the pressure differential, and the ferromagnetic fluid 12 is reliably held in it by the magnetic field of the magnet 10 concentrated in the annular gap using pole tips 11 As a result of the location of the housing wall in the confining nozzle chamber, the magneto-fluidic support itself, practically does not cause friction losses, at the same time protects the The rudder shaft support 7 - bearing 9 from the contact with the working medium. At. In this way, the bearing 9 reliably works in the environment of a neutral liquid filling the shield 5. Such conditions ensure long-term reliable and accurate operation of the flap drive assembly, despite changes in a wide pressure range of the working medium in the nozzle chamber. In addition, it is not necessary to increase the dimensions of the magneto-liquid support and the entire assembly, since the hole in the housing, combined with the elastic diaphragm blocked by the elastic diaphragm and filling the inner cavity of the screen with a neutral liquid, is relieved by external pressure. The drive assembly of the jet of the pressure regulator, comprising a housing with a nozzle chamber, in which a nozzle valve is located, is coupled to a two-shaft, the shaft is rigidly connected to a driven coupling half shielded magnetic coupling, leading the coupling half of which through a coupling rod .An with a manometric sensitive element, of those who, with. In order to increase the reliability and accuracy of the regulator, the quality of one of the shaft supports placed in the housing wall restricting the nozzle chamber, the magneto-liquid support was used, and a through hole between the nozzle chamber and the internal screen of the magnetic coupling was installed in the hole. an elastic element, the inner cavity of the screen is filled with a neutral liquid that is not miscible with the ferromagnetic liquid. a magnetic liquid support.,. , Sources of information taken into account in the examination 1. The author's certificate of the USSR N 732828, cl. G 05 D 16/06, 1980. 2. Jet hydraulic pressure regulator of OST5 type-RDM. 095-74 (prototype) ..