SU1516573A1 - Suction pipe of hydraulic machine - Google Patents

Abstract

The invention relates to hydropower construction. The purpose of the invention is to reduce the volume of construction work by reducing the length of the suction pipe in terms of while maintaining the optimum energy performance of the hydraulic machine. The suction pipe includes a cone 1, an elbow 2 with an output section height H _K and a steeply-curved outlet diffuser 3 with a lifting angle of 20 ° * 98A≤70 °. ELIMINATING DIFFUSER 3 IS EDUCATED BY A DUAL PROTECTION HAS BEEN POSSIBLE FROM GROWTH 4 AND 5, CONNECTED BY A ROLLER L ₂ = (0.5-2.0) H _K. The bend 2 of the suction pipe is mated to the inlet section of the diverting diffuser 3 by a straight horizontal insert 7 with a length L ₁ = (0.5 ÷ 1.0) H _K. When the hydraulic machine operates in turbine mode, water from the impeller enters the cone 1, where most of the kinetic energy of the flow is restored. From the cone 1, the water enters the knee 2 and then into the diffuser 3. The presence of a horizontal insert 7 connecting the elbow 2 with the initial part of the diverting diffuser 3 ensures alignment of the flow structure at the entrance to the diffuser 3 and reducing energy losses in it. The presence of a straight line transition section 6 between the two oppositely curved sockets 4 and 5 that form the diffuser 3 also helps to reduce the energy loss of the flow due to the mutual influence of closely spaced resistances (sockets 4 and 5). When operating in pumping mode, the flow of water passes through the elements of the suction pipe in reverse order.

Description

one

(21) 4009370 / 29-} 5

(22) 01/08/86

(46) 23.0 „89. Bul, № 39

(71) The Ukrainian Department of the All-Union Project-Survey and Research Institute Guide, Project 1, S.Ya., Zhuk and the Research Sector of the All-Union Project-Research and Research Institute, from the Institute of Gitsroproekt . S.Ya, Beetle

(72) S.G.Agayev, I.I. Ivanov, V.Mg.Kschshtratrap, V.A.Osadchuk, MF.Sarkisova and A.G. Sharkhuchov

(53) 627, FOR (088.8) (56) Pumped-storage power plants. / Ed. L, B. Scheynman. M .: Energie, 1978, p. 92, fig.4-31.

(5D) SUCTION PIPE OF HYDRAULIC MACHINES (57) The invention relates to hydropower construction. The purpose of the invention is to reduce construction work by reducing the length of the pipe with an octagonal pipe while maintaining the optimum energy performance of the hydraulic machine. The suction pipe includes a housing I, a bend 2 with a height of the output section h and a steeply curved discharge diffuser 3 with a lifting angle. The discharge diffuser 3 is formed by two oppositely bent sockets 4 and 5 connected by a straight-line section 1 (Oj5-2.0) h. The bend 2 of the suction tube is mated to the inlet section of the discharge diffuser 3

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a straight linear TicTanic horizon 7 with a length of 1 (0.5-l, 0) h. When the turbines are operated in turbine-1K1M mode of the type and: the impeller enters the cone 1, where most of the kinetic 7: flow energy is set. And cone 1, the water enters the knee 2 and then into the diffuser 3, and the presence of the throats of the insert 7, which connects the knee 2 to the initial part of the outlet diffuser 3, ensures that the flow structure is

The invention relates to the field of hydropower construction, in particular, to the construction of the outflowing pipe of hydraulic machines of hydroelectric power plants (HPPs), hydroaccumulative stations (PSPPs) and pumping stations (HCs), built mainly in lowering wells.

The purpose of the invention is to reduce the volume of construction works by reducing the length of the suction pipe in the plan while preserving and optimizing energy hara; tistikiki ;;,; about

In the drawing of an Ibrand, a pre-lot-suction suction pipe.

The suction pipe includes a cone 1, a knee 7. with a height of output section h and a steeply-curved outlet diffuser 3 with a lifting angle of 20 ct 70, Horn 1 diffuser 3 is shaped by two oppositely bent bells 4 and 5 connected by a length of 6 cm C O, 5-2, O), h,.,

The bend 2 of the suction tube is mated with the inlet section of the diverting diffuser 3 by a straight horizontal insert 7 with a length of 1, (0.5-1.0) h ,.

The suction pipe works as follows

When the hydraulic crank operates in turbine mode, water from the impeller enters cone 1, where most of the kinetic energy of the flow entering the extraction pipe is recovered. From cone 1, the cross-section enters the knee 2, in which part of the kinetic is also restored: the core and distant passages in diffuser 3 and the secondary losses in Hf M. The presence of a direct line (1 | of the transition section 6 Me; iyiy forming a diffuser 3 two P1k1 tiropolozhno curved sockets 4 and 5 also contribute to the reduction of the flow energy loss due to the mutual influence of closely spaced resistance, sockets 4 and 5). When operating in pumping mode, the flow of water passes through the elements of the suction pipe and the reverse sequence. 1 il.

neck - pizheeee ci; oi cr gay. Rest

hour .- ;. energy eats (Hey E BLiXOAiijM, P1 - Fusor - “At the same time, the difference is roiji; iOH7 ajibHoi RC barks i connect; 1b; th knee 2 .-. start at the uchaskom of the diverter di ,

obest TI years are aligned 1e of the flow structure. the entrance to the diffuser 3 and coo i neTCTiiL-.HHO decrease the loss of eper- ate p. It is the presence of a straightforward) -o nepexo iKOi of the part fi between the image: l l m diffuser 3 to two opposites (; 1 zgunug1 and sockets 4 and b, akl; i-11-dit to reduce losses; .iepj Hi; flow at the expense of B l aHMnoro nli and closely located resistances - d f (sockets 4 and 5).

When the hydropower plant is operating in the pumping mode, the suction pipe is operated in the cfuzer mode. Water comes from the reservoir

There is an element with sockets D and 5, a straight line of the same area 6, bounded between them, which ensures a loss of energy, alignment of the flow structure at the inlet to the cone 1 and corresponding to the input of the impeller.

Experimental studies of the hydraulic-hydraulic model of a pump turbine in a block with a suction tube made in accordance with this invention showed that the energy efficiency of a pump turbine is almost equal to the energy quality of a pump turbine with a normalized suction tube.

The extraction of the suction pipe with a cool 1: a curved di (M) pattern,

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formed by two oppositely bent sockets, allows you to perform the underwater part of the power plant building block (PSPP or not) with significantly smaller work volumes using the sump well, which significantly reduces construction costs.

Claims (1)

Invention Formula The suction pipe of the hydraulic machine, mainly the pump-turbine, consisting of a cone, elbow, and discharge diffuser, installed with elevations in the direction of the lower reach, is 165736 loving with with that The goal of reducing the volume of construction work is by reducing its length in terms of maintaining the optimal energy characteristics of the hydraulic machine, the diffuser retractor is installed with a lifting angle of 20 "70 70 and is made in the form of two oppositely curved sockets connected by a straight transition section (0, 5-2.0) -h, j, where h, is the height of the exit section of the knee, with the outlet diffuser connected to the knee straight horizontal inset length (0.5-1.0) bc,