Double safety protection device of top cap connection mechanism of hydroelectric generating unit
A technology of safety protection device and connecting mechanism, applied in the direction of connecting components, mechanical equipment, threaded fasteners, etc., can solve the problems of connection nut creeping and loss of mechanical connection, etc.
Inactive Publication Date: 2018-03-20
HARBIN ELECTRIC MASCH CO LTD
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Problems solved by technology
[0004] The invention discloses a double safety protection device for the connection mechanism of the top cover of a hydroelectric unit. The technical problem to be solved is that under different working conditions, the pressure amplitude is too large or the vibration of the unit causes the connection nut to wriggle, resulting in the loss of the effective connection between the top cover and the seat ring. When the mechanical connection is made, the safe operation of the hydroelectric unit can still be guaranteed
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[0010] like figure 1 , figure 2 As shown, a double safety protection device for the top cover connection mechanism of a hydroelectric unit, a force transmission part 8, a first nut 7 and a second nut 6 are added between the third nut 2 and the top cover 3 and on each screw 1 , and act on the screw rod 1 at the same time as the third nut 2, and there is a certain gap between the position of the force transmission part 8 close to the first nut 7 and the first nut 7, when installing, first put the second nut 6, the first nut 7 Tighten on the screw rod 1, and the first nut 7 is in contact with the second nut 6, which can play a role of anti-loosening; secondly, the third nut 2 acts on the force transmission part 8 through the screw rod 1; finally, pull it with a hydraulic tensioner Hold the upper end of the screw 1, pull the screw 1 to the predetermined stretching amount, tighten the third nut 2 on the screw 1 again, make it tightly act on the force transmission part 8, release ...
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The invention discloses a double safety protection device of a top cap connection mechanism of a hydroelectric generating unit. Force transmission parts are additionally arranged in the positions, between third nuts and a top cap, of screws correspondingly, the force transmission parts and the third nuts act on the screws simultaneously, and the force transmission parts and first nuts on the top cap have certain gaps. When the hydroelectric generating unit works normally, the pressure of pressure water acts on the force transmission parts, the screws, the third nuts and the force transmissionparts are in mechanical connection, so that effective mechanical connection between the top cap and a seat ring is guaranteed, and accordingly the sealing effect of a sealing strip is guaranteed; andwhen the screws and the third nuts move slightly, the force borne by the screws is reduced, elastic deformation of the screws recovers gradually, second nuts fall accordingly and make contact with theseat ring gradually, at the moment, the second nuts bear the load gradually, accordingly the effective mechanical connection between the top cap and the seat ring is guaranteed, it is guaranteed thatthe sealing strip continues playing a role in sealing, and the safety of the hydroelectric generating unit is protected.
Description
technical field [0001] The invention relates to a double safety protection device for a top cover connection mechanism of a hydroelectric unit. Background technique [0002] With the gradual improvement of users' requirements for the stability and safety of hydropower station operation, ensuring the safe and stable operation of hydropower units has become an important indicator for evaluating the operation status of hydropower units. However, during the operation of the hydroelectric unit, the unit vibration is often caused by the interaction of fluid, machinery, and electromagnetics, which makes the connecting bolts of the top cover subject to alternating stress, which easily causes the connecting bolts and nuts to wriggle. In addition, since the hydroelectric unit will operate under different water heads and different working conditions, the operating range of the unit under load is large, the startup and shutdown are frequent, and it is often operated under non-optimal wo...
Claims
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Login to View More IPC IPC(8): F16B39/12F16B39/10
CPCF16B39/12F16B39/108
Inventor 卜良峰覃大清羿兰贵赵越高欣王燕张晨琦刘永新高洪军杨卫彬
Owner HARBIN ELECTRIC MASCH CO LTD