A Mechanical Centrifugal Overrun Protection Device for Steam Turbine
A flying car protection and centrifugal technology, applied in the field of steam turbines, can solve the problems of potential safety hazards in collisions, limited scope of application, difficulties in manufacturing and assembly, etc., and achieve the effects of easy manufacturing and assembly, smooth movement, and simple structure
Active Publication Date: 2016-03-23
CHONGQING GEARBOX
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AI Technical Summary
Problems solved by technology
Although the reliability of the overrun protection device with this structure has been improved, the structure is very complicated, and it is difficult to manufacture and assemble. More importantly, there are potential safety hazards in collisions, so its safety is a problem that cannot be ignored.
In order to improve the safety of collision, this protection device is suitable for the case of low rotation speed of the rotating shaft, so the scope of application of this overrunning protection device is also limited
Method used
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Embodiment Construction
[0020] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:
[0021] like figure 1 , 2 As shown, a mechanical centrifugal overrun protection device for a steam turbine is mainly composed of a rotating shaft 1, an air intake valve, an oil inlet nozzle 2, a large flange 3, a small flange 4, a box body 5, an oil inlet joint 6, bolts 7, Adjusting gasket 8, return spring 9, sealing cover 10 and lock nut 11 constitute. Wherein, the end surface of the rotating shaft 1 is provided with an oil inlet chamber 1a along the axis line, and the oil inlet chamber 1a communicates with the inner end of the oil outlet hole 1c through a "cross" shaped oil inlet hole 1b, and the oil outlet hole The outer end of 1c penetrates the outer circular surface of the rotating shaft 1, and the oil outlet hole 1c is a radial hole. At the same time, the oil inlet chamber 1a communicates with the control oil end of the intake valve (not shown in the ...
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The invention discloses a mechanical centrifugal type runaway protection device of a turbine. An oil inlet cavity is formed in the end face of a rotary shaft and communicated with an oil outlet through an oil inlet, the oil inlet cavity is also communicated with the oil control end of an air inlet valve and is in clearance fit with the right portion of an oil inlet nozzle, and an oil inlet connector is installed in a center hole of a small flange and is communicated with an oil pump through an oil inlet pipe; a radial hole is formed in the rotary shaft, a bolt is sequentially sleeved with an adjusting shim and a reset spring and then is inserted into the radial hole, the rod portion of the bolt extends to the outside of the radial hole and then is sequentially sleeved with a sealing cover and a locking nut, the end face of the sealing cover is attached to the outer circular surface of the rotary shaft, and an oil storage groove in the inner surface of the sealing cover is communicated with the outer end of the oil outlet. According to the mechanical centrifugal type runaway protection device of the turbine, the oil pressure of the oil control end of the air inlet valve is controlled by controlling the state of the sealing cover, and then runaway protection is achieved. The protection device does not need electricity for work and is high in reliability.
Description
technical field [0001] The invention belongs to the field of steam turbines, and in particular relates to a mechanical centrifugal flywheel protection device for steam turbines. Background technique [0002] The rotating shaft is one of the important components of the steam turbine. In order to ensure the safe operation of the rotating shaft, the highest safe speed is set in advance. Once the actual speed of the rotating shaft exceeds the designed maximum safe speed, it is easy to cause a safety accident. Therefore, it is necessary to design the overrun protection for the rotating shaft of the steam turbine. device. It should be noted that the actual rotational speed of the rotating shaft is closely related to the opening and closing degree of the intake valve. When the opening and closing degree of the intake valve decreases, the actual rotational speed of the rotating shaft decreases. Moreover, the intake valve has two sets of parallel control systems to control the openi...
Claims
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IPC IPC(8): F01D21/00
Inventor 甘文亮李强吴玉莲王弟方冯健冉贞德
Owner CHONGQING GEARBOX