Hydraulic machinery and its operation method
A technology of hydraulic machinery and runners, which is applied in the directions of hydraulic power generation, mechanical equipment, engine components, etc., and can solve problems such as water pressure fluctuations that are not raised.
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no. 1 approach ）
[0042] figure 1 It is a sectional view showing the structure of the hydraulic machine of the first embodiment. figure 1 The hydraulic machinery is equivalent to the Francis water turbine.
[0043] figure 1 hydraulic machinery and Figure 7 The hydraulic machinery is the same, with volute 1, fixed guide vane 2, seat ring 3, guide vane 4, runner 5, upper cover 6, lower cover 7, suction pipe 8, main shaft 9 and generator 10.
[0044]The runner 5 of the present embodiment has a plurality of blades 5a, an upper crown 5b, and a lower ring 5c, but does not have a drain cone. As a result, the crown 5b of this embodiment has the lower end surface S exposed to the downstream side of the rotor 5 at the position surrounded by the blade 5a.
[0045] The upper crown 5b of this embodiment has a hollow at the upper part of the lower end surface S. As shown in FIG. The upper crown 5b may not have such a hollow, but by providing such a hollow in the upper crown 5b, the weight of the uppe...
no. 2 approach ）
[0059] image 3 It is a sectional view showing the structure of the hydraulic machine of the second embodiment.
[0060] In this embodiment, image 3 The lower end surface S of the upper crown 5b is a hollow flat surface having a ring shape. In addition, in the present embodiment, the columnar member 21 is attached to the wall surface of the suction pipe 8 via the strut 22 . Specifically, the columnar member 21 is attached to the wall surface of the part (upper suction pipe) upstream of the bent portion of the suction pipe 8 via the strut 22 . Therefore, the columnar member 21 of this embodiment does not rotate together with the runner 5 and the main shaft 9, but stands still.
[0061] In addition, in this embodiment, although the number of objects of the support|pillar 22 is 2, as long as it is the number of objects which can support the columnar member 21, it may be arbitrary numbers. In addition, the lower end surface S of the upper crown 5b may not be a hollow flat sur...
no. 3 approach ）
[0065] Figure 4 It is a sectional view showing the structure of the hydraulic machine of the third embodiment.
[0066] In this embodiment, Figure 4 The lower end surface S of the upper crown 5b is a hollow flat surface having a ring shape. In addition, the hydraulic machine of the present embodiment includes an air supply pipe 23 passing inside the main shaft 9 and the upper crown 5 b , and a pressure sensor 24 downstream of the runner 5 to detect occurrence of unstable vibration. As indicated by the arrow M, the air supply pipe 23 has a structure in which the front end portion can expand and contract in the vertical direction. In addition, the pressure sensor 24 is attached to the outer wall surface of the suction pipe 8 (specifically, the upper suction pipe).
[0067] In this embodiment, the air supply pipe 23 is used to suppress Figure 7 Fluctuations in water pressure due to the spin mode or telescoping mode of the vortex 11 are shown. The gas supply pipe 23 of the ...
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