Hydraulic cylinder turning gear of steam turbine generator unit
A technology of turbogenerator set and turning device, which is applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve the problems of turbogenerator set limitations, high cost, and bulky reducer, and achieve low cost and structural Simple, good device versatility
Active Publication Date: 2013-12-25
STATE GRID CORP OF CHINA +1
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Problems solved by technology
With the continuous increase of unit capacity, the required turning force is also increasing. For example, when turning an 800MW unit, the weight of the rotor wheel system is more than 250 tons, and the thrust of the turning turning ring gear is as high as 200kN, and the reducer is bulky. , some steam turbine generator sets are often limited due to the site for placing and repairing the turning gear
The drive method using hydraulic motor is very expensive
Method used
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Embodiment 1
[0026] Such as Figure 1-4 As shown, the hydraulic cylinder barring device of the turbogenerator set of the present invention, the turbogenerator set includes a steam turbine, a generator and an exciter, the steam turbine includes a stator part and a rotor part, and the rotor part includes a gear train, The main shaft and coupling, the gear train is provided with a gear ring 9, and the device includes a bracket 13, an oil cylinder 1 connected to the bracket 13 by hinged top 14 of the cylinder tail bracket arranged perpendicular to the bracket 13 , the piston hinge shaft 2, pawl shaft 4, and ratchet shaft 7 at the top of the oil cylinder 1 that are vertically connected to the force transmission plate 3 in turn; the pawl shaft 7 is provided with pawls, and the ratchet shaft 7 is provided with The ratchet 6 is connected with the turning gear 8, and the turning gear 8 is connected with the turning ring gear of the steam turbine train.
[0027] The pawls include a forward rotation...
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The invention relates to a hydraulic cylinder turning gear of a steam turbine generator unit. The hydraulic cylinder turning gear comprises a support, an oil cylinder, a piston hinge shaft at the top end of the oil cylinder, a pawl shaft and a ratchet shaft, the oil cylinder is obliquely arranged on the support through a cylinder tail support, the piston hinge shaft, the pawl shaft and the ratchet shaft are vertically connected with a force transferring plate in sequence, pawls are arranged on the pawl shaft, a ratchet and a turning gear body are arranged at two ends of the ratchet shaft, and the turning gear body is connected with a turning gear ring of a steam turbine gear train. The device is novel in structure, small in size, simple to operate, safe and reliable to use and capable of realizing effect that a rotor system of the steam turbine generator unit of hundreds of tons rotates along with the hydraulic cylinder turning gear.
Description
Technical field: [0001] The invention relates to a cranking device, more particularly to a hydraulic cylinder cranking device of a steam turbine generator set. Background technique: [0002] During the installation and maintenance process of the steam turbine generator set in a thermal power plant, it is necessary to rotate the shafting system to find the center of its wheel, measure the dynamic and static clearance, the seal clearance, the sway, etc., and the rotor needs to be repeatedly rotated and stopped at any time. Most of the existing cranking devices for maintenance of turbogenerators adopt the type of motor + reducer + gear + clutch, and some use the type of hydraulic motor + clutch + low-speed rolling bearing + high-speed sliding bearing. With the continuous increase of unit capacity, the required turning force is also increasing. For example, when turning an 800MW unit, the weight of the rotor wheel system is more than 250 tons, and the thrust of the turning turni...
Claims
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Inventor 邹玉英江明布春磊
Owner STATE GRID CORP OF CHINA