Steam turbine low-pressure cylinder flexible sealing ring supporting device

Abstract

The invention belongs to the technical field of maintenance of steam turbines and particularly relates to a steam turbine low-pressure cylinder flexible sealing ring supporting device. A left U-shapedframe and a right U-shaped frame are two semi-symmetric structures and can be unfolded or folded along a rotating shaft; a flexible sealing rings is stored in the left U-shaped frame and the right U-shaped frame and is fixed by quick bolts A; an optic axis is connected with triangular reinforcing rods through quick clamps B; stand columns are connected with the optical axis through L-shaped frames and are connected with the triangular reinforcing rods through hinged structures; holes are drilled in hinged frames, rotating pin shafts are mounted on the hinge frames; rotating pin hole seats arehinged with the hinged frames through rotating pin shafts; hinged points are located on a horizontal center line of a steam turbine low-pressure cylinder; the lower parts of the stand columns are inserted into the rotating pin hole seats and are subsequently locked by quick clamps C to form a whole body; the left U-shaped frame and the right U-shaped frame can rotate turn along the rotating pin shafts to leave away from a vertical center line. The steam turbine low-pressure cylinder flexible sealing ring supporting device is capable of more quickly, conveniently and safely supporting, storingand moving the flexible sealing ring; and the damage risks of trample, collision and tensile deformation of the flexible sealing ring can be avoided.

Description

technical field [0001] The invention belongs to the technical field of steam turbine maintenance, and in particular relates to a flexible sealing ring support device for a low-pressure cylinder of a steam turbine. Background technique [0002] As the key and important equipment of the secondary circuit of the nuclear power plant, the steam turbine is a prime mover that converts the thermal energy of nuclear steam into mechanical energy and drives the generator to rotate. Units 1-4 of a nuclear power plant use HD1080A steam turbines. The low-pressure cylinder is a double-layer cylinder structure. A flexible sealing ring is designed between the inner cylinder and the outer cylinder to absorb the free expansion of the outer cylinder relative to the inner cylinder and ensure that the cylinder The airtightness between the interior and exterior of a structure, thus preventing the entry of outside air. [0003] The flexible sealing ring is a full-circle rubber structure, which can...

AI Technical Summary

Problems solved by technology

[0003] The flexible sealing ring is a full-ring rubber structure, which cannot be disassembled by design

During the disassembly and maintenance of the low-pressure cylinder of the steam turbine, it is directly stored on both sides of the cylinder body, and there is a risk of damage such as being trampled, collided, stretched and deformed

At the same time, during the maintenance period, due to the hoisting work of the steam turbine inner cylinder, rotor and other equipment, the flexible sealing ring needs to be moved many times. The flexible sealing ring weighs 100Kg, and it is very inconvenient to move manually.

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