RU2168098C2 - Controllable throttling valve - Google Patents

Abstract

FIELD: control equipment. SUBSTANCE: controllable throttling valve has hollow body with sealed cover and inlet and outlet channels. It also includes flexible member with through channel arranged in body and control system of flow section of flexible member channel. Control system is made as a pusher and control power device engaged with the pusher. Flexible member is made in the form of capillary-porous mass, for example, polymer-based, arranged in cup which is cylindrical form with perforated bottom and partially with side walls and side surface. Cup is positioned in the body. It is sealed relative to internal surface of the body and its bottom is turned towards inlet hole. The body is provided with circular collector which is coupled to outlet channel. Collector embraces perforated part of the cup. Pusher is made as a piston sealed with respect to the cup and body. Piston interacts with flexible member and is spring-loaded to cover. Power device is made, for example, in the form of pneumatic system with a source and facilities of control pressure supply. EFFECT: extended range of consumption continuous control, stabilization of flow, reduced pulsations and formation of vortex, enhanced reliability and durability. 1 dwg

Description

 The invention relates to the field of technology, to the elements of a volumetric hydraulic actuator, namely to control equipment.

 Known adjustable throttle (US patent N 4596377, stated. 20.08.84, Z. N 642472, publ. 24.06.86, CL F 16 K 31/44), in the housing of which is placed a throttling element consisting of two ceramic disks with holes . One of the disks is fixedly mounted in the case, and the second is mounted on the rotary sleeve and abuts against the end face of the first disk with its end face. When you turn the sleeve with a movable disk changes the bore of the through channel. The throttle is controlled by an electric motor with an integrated gearbox and a flywheel associated with a sector on the rotary sleeve.

 The disadvantage of this device is the design complexity, as well as the limited ability to fine-tune the flow area of the throttle and the presence of vortex formation of the working medium when passing through the sharp edges of the holes.

 Known hydraulic throttle (patent GDR N 254236, application. 05.12.86, z. N 2971112, publ. 17.02.88, CL F 16 K 77/00), which is adopted as a prototype, containing a cylindrical body with an internal channel, which placed a tube of polymeric material, the ends of the tube are sealed relative to the housing. In the housing there is a fitting with a radial channel perpendicular to the tube. A ball is installed in the channel that interacts with the tube and a ball pusher mounted on the nozzle.

 The design drawback is the inability to remotely control automation and can be adjusted remotely during the operation of the device (this system is not shown in the drawing). The force on the piston 14 (with a slight change in design) can also be obtained by means of an electro- or electromagnetic system or in another way.

 The device operates as follows. Through the input channel 3 of the housing 1 and the system of openings 10 in the bottom 9 of the glass 7, the working medium penetrates into the capillary-porous mass 17 in the glass 7 and through the perforated part of the surface 8, the collector 13 and the output channel 4 of the housing 1 are discharged from the device. If necessary, change the flow rate and pressure of the working medium by acting on the piston 14 from an external system (for example, by supplying an excess controlled pressure through the opening 6 in the cover 5), the piston 14 is moved toward the bottom 9 of the glass 7. In this case, volume compression of the capillary-porous mass occurs 17, microchannels change their shape and dimensions, hydraulic resistance to movement of the working medium increases. An almost complete overlap of the path between channels 3 and 4 can be obtained. The nature of the flow of the working medium also changes, the pulsations and vortices that occur at the inlet of the throttle are quenched in mass 17 when passing through microchannels, which in some applications can be a determining factor.

 When reducing the pressure supplied to the piston 14 through the hole 6, under the action of the elastic forces of the mass 17, the piston 14 moves towards the cover 5, the microchannels increase and the hydraulic resistance of the tract decreases. The piston 14, if necessary, can be constantly pressed against the mass 17 by a tension-compression spring 18, and the spring force can be adjusted by changing the axial dimensions of the adjusting washer 19.

 The quantitative values of the range, the accuracy of regulation of the hydraulic resistance of the throttle, as well as the effect of changing the nature of the flow of the working medium depend on the specific design of the device and can be determined empirically.

 As an example of the application of the proposed device, you can specify the use of a throttle as a regulator of flow parameters in experimental bench-mounted pneumohydrosystems.

 The device does not represent technical and technological difficulties for the manufacture of known metalworking techniques.

Claims (1)

 An adjustable throttle, including a hollow body with a sealed cover, input and output channels, an elastic element with a through channel located in the housing, as well as a system for regulating the passage section of the channel of the elastic element, made in the form of a pusher and a control power device interacting with the pusher, characterized in that the elastic element is made in the form of a capillary-porous mass, for example, on a polymer basis, placed in a cylindrical glass with a perforated bottom and partially lateral rotation In fact, the cup is installed in the housing, sealed relative to its inner surface and facing the bottom toward the inlet, the housing is equipped with an annular collector in communication with the output channel and covering the perforated part of the side surface of the cup, the pusher is made in the form of a piston that is sealed relative to the cup and the housing, interacting with elastic element and spring-loaded to the cover, and the power device is made, for example, in the form of a pneumatic system with a source and means for supplying an adjustable d avleniya.