SU703721A1 - Flow rate limiting device - Google Patents

Description

(54) RAHBDA LIMITER

,-/-, one --

. This invention relates to the field of hydraulic drive and hydraulic automation and to be used in. machine building in all branches of the national economy.

Known valves with elastic control element that performs the function of the flow limiter 1.

Valves are known that contain elastic control elements and function as a pressure valve 2. The disadvantages of such valves are the limited capacity, the inconvenience of adjusting the initial working bore section & given flow rate and instability. static characteristics with a relatively large pressure drop of regulation. ... in order to ensure stable

The static characteristics and the flow rate increase with a constant differential pressure of the beginning of the regulation. In the proposed flow limiter, separating washers are installed between the elastic control plates. .

In order to control TV

the initial working bore at a predetermined flow rate, on the side of the pressure hydroline coaxially to the regulating elements

with a tapered surface, with the possibility of axial movement relative to the central hole of the lower regulator:

In Fig. 1 shows the limiter

flow, cut; in fig. 2 shows section A-A in FIG. one.

The flow limiter contains a package of elastic annular plates 1, separated by washers 2 and rings, 3. The package is fixed by screws 4, washers 5 and cover 6 on the end surface inside the case. 7. The VTU.LKI 8 and 9 with sealing rings 10 and 11 are coaxially screwed on both sides. The sleeve 9 with the conical surface abuts against the sharp edge 12 of the lower adjustable plate. By rotating the sleeve 9, the working flow area between the two lower plates 1 is adjusted, the adjustment of the flow limiter is fixed by the adjusting ring 13. The cavity under the lower plate 1 communicates with the cavity 14 through the hole 15.

Flow limiter works as follows

The working fluid flow from field 14, the working flow areas passed between the top plate 1 and adjacent to it and between the bottom plate 1 and adjacent to it, then between washers 2, enters the hydroline of user 16. I don’t use middle plates to 1 flow of slabs liquids are blocked by the ring 3 path. At the beginning, with increasing pressure pressure through the initial flow sections, the flow passes through constant Yresel, then, following advances in the regulation start pressure, a critical flow rate occurs, Ora elastic plate Prgibats start and reduce the working flow section. A further increase in pressure drop bends more flexibly the adjustable plates than on one) and maintains the constancy of the flow rate of the fluid (regardless of the injection pressure supplied). By increasing the number of plates 1, washers 2, and rings 3, it is possible, by slightly increasing the size of the flow limiter, to increase by several times the total working passage area and, consequently, the required flow rate through the flow limiter (at the same time increasing the pressure control pressure drop). The CCTBO ensures the stability of static performance in an adjustable range.

Claims (2)

1. A flow limiter containing elastic control plates with a central axial orifice assembled in a package in a shell, so that, in order to provide a stable static characteristic and increase the flow rate at a constant differential pressure of the start of regulation, Separating washers are installed between the elastic control plates. 2. The flow limiter according to claim 1, that is, so that, in order to conveniently regulate the initial working flow area for a given flow rate, a sleeve with a tapered surface is installed on the side of the hydraulic control unit and coaxially to the regulating elements axial movement relative to 5 central holes of the lower control element. Sources of information taken into account in the examination 0, 1. USSR author's certificate 495484, cl. F 16 K 25/00, 1971. 2. USSR inventor's certificate O 407135, cl, G 16 K 17/06, 1971 Prototype.