Hydraulic machine

A technology of hydraulic machinery and guide vanes, applied in the field of hydraulic machinery, can solve the problems of increased loss, increased flow loss of guide vanes 120, flow turbulence, etc., and achieve the effect of reducing flow loss and suppressing horseshoe-shaped vortices

Active Publication Date: 2018-06-08
KK TOSHIBA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The generation of such a horseshoe-shaped vortex W disturbs the flow of water flowing into the guide vane 120, and thus the loss of the flow on the guide vane 120 may increase.
In addition, since water flows into the flow channel in a turbulent flow, the flow loss on the flow channel may also increase.

Method used

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Examples

Experimental program
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Effect test

no. 1 approach

[0031] figure 1 It shows the Francis-type pump-turbine 1 as an example of the hydraulic machine according to the first embodiment of the present invention. In addition, in the following description, the Francis-type pump-turbine 1 is simply referred to as the hydraulic turbine 1 . The water turbine 1 includes a casing 10 into which water flows through an iron pipe 11 from an upper tank (not shown), a plurality of guide vanes 12 , a plurality of stator vanes 13 , and a flow channel 14 .

[0032] In the hydraulic turbine 1 , during the operation of the hydraulic turbine, the water from the casing 10 flows into the flow channel 14 through the stationary blade row flow path constituted by the guide vanes 12 and the stator vanes 13 . Thereby, the flow channel 14 rotates around the flow channel rotation axis C1. In addition, in the following description, when it is only called the axial direction, it means that the direction is the direction on the flow path rotation axis C1 or t...

no. 2 approach

[0048] Next, the second embodiment will be described. Figure 4 It is the figure which looked at the stator vane, the guide vane, and the lower cover of the Francis-type pump-turbine which concerns on 2nd Embodiment along the rotation axis of a flow passage. In this embodiment, the same reference numerals are given to the same components as those of the above-described first embodiment, and descriptions thereof will be omitted.

[0049] In the present embodiment, the configuration of the groove 41 is different from that of the first embodiment. That is, as Figure 4 As shown, the groove 41 in the present embodiment is formed on an arc centered on the guide vane rotation axis L1 passing between the adjacent guide vanes 12 and the stator vanes 13, and is formed, for example, in a Figure 4 on the arc of the part of the circle indicated by the dotted line. The grooves 41 are provided for each combination of the adjacent guide vanes 12 and the stator vanes 13 , and each groove ...

no. 3 approach

[0053] Next, a third embodiment will be described. Figure 5 It is a meridian cross-sectional view of the Francis-type pump-turbine according to the third embodiment. In this embodiment, the same components as those of the above-described embodiments are denoted by the same reference numerals, and the description thereof will be omitted.

[0054] In the above-described first embodiment, the suction hole 42 sends the suctioned water to the outside of the turbine 1 as an example, but in this embodiment, the water suctioned by the suction hole 42 is sent to the flow passage side pressure chamber 20 . Specifically, Figure 5 As shown, the suction mechanism 30 has a pipe portion 43 that communicates the suction hole 42 with the flow passage side pressure chamber 20 . In addition, the arrangement|positioning structure of the suction hole 42 is the same as that of 1st Embodiment.

[0055] Such an embodiment can also suppress the generation of horseshoe-shaped vortices that may be ...

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PUM

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Abstract

The present invention provides a hydraulic machine that suppresses the generation of horseshoe-shaped vortices that may be generated around the guide vanes and reduces the loss. A Francis-type pump turbine (1) as a hydraulic machine is a hydraulic machine that rotates a flow path (14) by water flowing from a fixed blade (13) to a flow path (14) via a guide vane (12). An upper cover (18U) is disposed above the fixed blade (13) and the guide vane (12), and a lower cover (18D) is disposed below. Then, it is provided with a suction mechanism that can suck in at least one of the area between the fixed blade (13) and the guide vane (12) on the upper cover (18U) side and the lower cover (18D) side.

Description

technical field [0001] Embodiments of the invention relate to a hydraulic machine. Background technique [0002] As a hydraulic machine, for example, a Francis-type hydraulic turbine and a Francis-type pump-turbine are known. Figure 12 It is a figure which shows the stationary blade row flow path which consists of the guide vane 120 and the stationary vane 130 of a general Francis-type pump-turbine in a plan view. A plurality of guide vanes 120 are arranged at intervals in the circumferential direction so as to surround the flow channel on the radially outer side of the flow channel (not shown). A plurality of them are arranged at intervals upward. In addition, a casing (not shown) is arranged radially outside the stator vane 130 . [0003] Figure 12 The hollow arrows in the middle indicate the direction of the water flow during the operation of the turbine, and the blackened arrows indicate the direction of the water flow during the operation of the pump. In this Franc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03B3/02F03B3/12F03B3/18
CPCF03B3/02F03B3/125F03B3/186Y02E10/20
Inventor 成川円川尻秀之黑泽贞男翟雅斌大竹典男富冈拓也稻田浩也
Owner KK TOSHIBA
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