Inspection Method of Upper and Lower Leakage Rings of Vertical Shaft Francis Turbine
A technology of mixed flow and hydraulic turbines, which is applied in the direction of reaction engines, mechanical equipment, hydroelectric power generation, etc., and can solve the problems of difficult operation, long construction period, and high manpower and material resources, so as to reduce the difficulty of operation, save time and labor, and save The effect of equipment cost
Active Publication Date: 2022-05-24
STATE GRID CORP OF CHINA +2
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Problems solved by technology
At present, due to the limitation of the internal space of the vertical shaft Francis turbine and the inspection period, the inspection of the upper and lower check rings of the vertical shaft Francis turbine is usually carried out during the overhaul stage. The inspection method is to lift the entire unit out of the pit and then dismantle it Sub-inspection, the operation is extremely difficult and requires a lot of manpower and material resources, and it usually takes more than four months to complete the inspection, and the construction period is long
Method used
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Embodiment Construction
[0037] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0038] like figure 1 and figure 2 As shown in the figure, the bottom of the runner 2 of the vertical-axis Francis turbine is fixedly connected with the top cover 3, the bottom ring 4 supports a plurality of guide vanes 5 distributed around the runner 2 at intervals, and the top cover 3 is supported on each guide vane 5, and the upper cover 3 is supported on each guide vane 5. The o-ring 1 is located at the joint of the runner 2 and the top cover 3, the lower anti-leak ring 11 is located at the joint of the bottom of the runner 2 and the bottom ring 4, and the axial force of the runner 2 is supported in a plurality of evenly spaced and can. On the air damper 6 of the lift adjustment.
[0039] Figure 2 to Figure 6 An embodiment of the inspection method for the upper and lower o-rings of the vertical-axis Francis turbine of the presen...
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The invention discloses a construction method for checking the upper and lower leakage stop rings of a vertical shaft mixed-flow water turbine, which comprises the steps of: removing the connection of the top cover; arranging a hydraulic jack; lifting the top cover; arranging buttresses; Leak stop ring: If the height of the top cover meets the requirements, proceed: check the upper leak stop ring between the top cover and the runner; if the height of the top cover fails to meet the requirements, proceed: at the top of each pier Set up booster pads, each hydraulic jack falls back, the top cover is supported on the booster pads on each pier, add booster pads to the top of each hydraulic jack, and lift up synchronously again; check the lower leak-proof ring; remove at least three orbiting wheels spaced apart place the hydraulic jack at the original position where the damper has been removed, and use the left damper as a buttress. According to the method of lifting the top cover, raise the runner to a height that meets the requirements, and then lower the Check the leak ring. This construction method is less difficult to operate, saves time and effort, and can shorten the inspection period.
Description
technical field [0001] The invention relates to the technical field of vertical shaft Francis turbine inspection, in particular to a method for inspecting the upper and lower leakproof rings of a vertical shaft Francis turbine. Background technique [0002] Vertical shaft Francis turbine upper and lower leakage rings are generally comb type and stepped type rings, such as figure 1 and figure 2 As shown in the figure, the bottom of the runner 2 is fixedly connected with the top cover 3, the bottom ring 4 supports a plurality of guide vanes 5 distributed around the runner 2 at intervals, the top cover 3 is supported on each guide vane 5, and the upper leak-proof ring 1 It is located at the joint of the bottom of the runner 2 and the top cover 3, and the lower leak-proof ring 11 is located at the joint of the runner 2 and the bottom ring 4. The axial force of the runner 2 is supported by a plurality of uniformly spaced and adjustable wind turbines. on gate 6. The main funct...
Claims
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IPC IPC(8): F03B11/00F03B3/02
CPCF03B11/00F03B11/008F03B11/006F03B3/02Y02E10/20
Inventor 刘平王君彭耐梓
Owner STATE GRID CORP OF CHINA