US 9,790,066 B2 · Rotating shaft lifting jig and rotating shaft lifting method

Abstract

A rotating shaft lifting jig is inserted between a rotating shaft of a rotary machine and a bearing stand surrounding the outer periphery of at least a lower part of the rotating shaft. The jig for lifting the rotating shaft includes: a pedestal which is supported on an inner peripheral surface of the bearing stand; and a jack part which is disposed between the pedestal and the outer peripheral surface of the rotating shaft and extends/contracts in the radial direction. The radial dimension of the pedestal is smaller than a radial clearance between the rotating shaft and the bearing stand. A rotor receiver having a cylindrical surface conforming to the outer peripheral surface of the rotating shaft is provided between the jack part and the rotating shaft. The rotor receiver is provided with a plurality of support members in directions different from the direction of the jack part.

Claims20

Dependent claims

A rotating shaft lifting jig which is inserted between a rotating shaft of a rotary machine and a bearing stand surrounding an outer periphery of at least a lower part of the rotating shaft, the rotating shaft lifting jig comprising:

a pedestal which is supported on an inner peripheral surface of the bearing stand under the rotating shaft;
a rotor receiver, an inner peripheral surface of which is formed so as to conform to an outer peripheral surface of the rotating shaft, and which covers the outer periphery of the rotating shaft on a lower side by extending in a peripheral direction of the rotating shaft;
a jack part which is disposed between the pedestal and the rotor receiver, the jack part extends upward in a vertical direction to move the rotating shaft along with the rotor receiver upward in the vertical direction:
a plurality of support members which are interposed between the rotor receiver and the bearing stand, the support members extending in radial directions of the rotating shaft, and the support members support the rotor receiver against the bearing stand from directions different from the vertical direction and the radial directions are different from one another.

1 more element

A rotating shaft lifting method for lifting a rotating shaft of a rotary machine by means of a jig which is inserted between the rotating shaft and a bearing stand surrounding an outer periphery of at least a lower part of the rotating shaft, the rotating shaft lifting method comprising the steps of:

fixing a pedestal, of which a radial dimension is smaller than a radial clearance between the rotating shaft and the bearing stand, between the rotating shaft and the bearing stand so as to be supported on the bearing stand;
mounting a jack part, which extends upward in a vertical direction and lifts the rotating shaft from below, on the pedestal;
mounting a rotor receiver between the jack part and the rotating shaft, the rotor receiver having a cylindrical surface conforming to an outer peripheral surface of the rotating shaft;
providing the rotor receiver with a plurality of support members extending in radial directions of the rotating shaft, the radial directions being different from the vertical direction in which the jack part extends, and the radial directions being different from one another, wherein the plurality of support members are interposed between the rotor receiver and the bearing stand;
and activating the jack part and extending the jack part upward in the vertical direction.

2 more elements

Dependencies are inferred from the claim text.

Rotating shaft lifting jig and rotating shaft lifting method

Life of this patent

Rotating shaft lifting jig and rotating shaft lifting method

Life of this patent

Abstract

Claims20