SU1712530A1 - Hydraulic energy dissipator - Google Patents

Description

SrigZ

The invention relates to hydraulic engineering, in particular to outlets, and can be used to quench the energy of the water flow in the downstream side of the tubular outlets.

The purpose of the invention is to increase efficiency and reliability in operation.

In Fig.1 shows a quencher energy flow with a conical expansion, longitudinal section; figure 2 - section aa in figure 1; on fig.Z - flow energy absorber with a curvilinear expansion, longitudinal section; figure 4 is a section on fig.Z; figure 5 - the energy absorber flow with two lines of pipelines, top view; figure 6 - section bb In figure 5.

The energy damper of the flow includes a horizontal section of the conduit 1. conical expansion 2 or curvilinear expansion 3. Inside the expansion of the conical 2 or curvilinear 3 curvilinear blades 4 are rigidly fixed, which divide the flow into the jets 5. The flow is extinguished in the damping chamber 6 and discharged by the discharge channel 7 .

The inflow stream, the passage through the horizontal section of the conduit 1, in the terminal expansion with curvilinear blades 4, is structurally divided into two symmetrical parts. In the case of a conical expansion 2 and with a small value of the taper angle and the final angle of rotation of the blades 4, it is possible to achieve that the expanded and quenched flow is rejected for a large distance from the base of the structure. This eliminates the bottom mode and, consequently, the possible undermining of the structure in the unfortified bed. By adjusting the angle of taper of expansion 2 and the final angle of rotation of the curvilinear blades 4 to the outgoing expanded flow, the shape corresponding to the cross-sectional shape of the outlet channel 7 is attached. not cleaved. When the flow is divided into two parts and twisted in different directions, there is no twisting moment, and the force of the flow pressure on the curvilinear blades 4 is compensated by the reaction from the base. In the case of a curvilinear expansion 3, the flow divided into two parts, under the action of centrifugal force, expands and is brought into an inkjet impact in the damping chamber 6 (Fig. 3, 4). In the case of paired pipelines (Figs. 5, 6), the flow energy absorbers on the pipelines are oriented in such a way that the flow is brought into an inkjet impact in the damping chamber 6. Curvilinear expansion 3 has a generator, whose angle of rotation toward the end increases gradually. The equation of this generator in the Cartesian coordinate system is

.. tg Ok 2 U-51

where y, X is the ordinate and abscissa of the curvilinear expansion generator;

OK is the angle between the tangent to the generator at the end of the curvilinear expansion and the longitudinal axis, OK 90 °;

t is the length of the extension.

This form of curvilinear expansion 3 is the optimal technical solution, since only in this case it is possible to completely expand the flow at the outlet.

and bring into mutual collision in the extinguishing chamber 6 .. The flow energy extinguisher allows to bring, if necessary, into the mutual jet impact of the flows on

paired pipelines. In this case, the pressure forces of the flow on the curved blades of the 4 dampers are directed in opposite directions so that they compensate each other.

The flow energy absorber allows, using the effect of centrifugal force to expand the output flow, to bring it into a mutual collision, preventing turbulence in the discharge channel 7.

Claims (3)

1. Extinguisher. Flow energy, including a conduit with an end expansion and curvilinear blades installed inside the extension, characterized in that, in order to increase efficiency and efficiency, the blades are installed symmetrically relative to the plane passing along the longitudinal axis the extensions, the blades, of the races (:: laid from different sides of the said plane, are oppositely oriented. 2. A flow energy damper according to claim 1, wherein the expansion is made conical with a taper angle less than 90 °. 3. A flow energy damper according to claim 1, wherein the expansion is made curvilinear with convexity in the direction of flow and the generator described by the Cartesian coordinate system by the equation w - 9 Qit w2 y - 2j-x. where y, X is the ordinate and abscissa of the curvilinear expansion generator; Ok is the angle between the tangent and the 8 end of the curvilinear expansion and the longitudinal axis of the expansion, approx. 90 °: I is the length of the expansion. g / G1 iftue z