Rotating shaft lifting jig and rotating shaft lifting method

Patent metadata

Field	Value
Publication number	US-9790066-B2
Application number	US-201414780254-A
Country	US
Kind code	B2
Filing date	Jun 9, 2014
Priority date	Jun 12, 2013
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

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.

First claim

The invention claimed is:

1. 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.

2. The rotating shaft lifting jig according to claim 1 , wherein the plurality of support members are disposed with the jack part being interposed therebetween in the peripheral direction of the rotating shaft.

3. The rotating shaft lifting jig according to claim 1 , wherein the pedestal has a curved surface having part of a cylindrical surface conforming to the inner peripheral surface of the bearing stand.

4. The rotating shaft lifting jig according to claim 1 , wherein the bearing stand has an opening at a bottom of the bearing stand, and the pedestal is provided with a protrusion which projects downward and engages with the opening.

5. 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.

6. The rotating shaft lifting jig according to claim 1 , wherein an inner surface of at least a lower half part of the bearing stand has a cylindrical shape concentric with the rotating shaft.

7. The rotating shaft lifting jig according to claim 1 , wherein the rotor receiver is a semi-annular member which covers the outer periphery of the rotating shaft on the lower side in close contact with the rotating shaft.

8. The rotating shaft lifting jig according to claim 1 , wherein the rotor receiver has a cylindrical surface that butts against an outer peripheral surface of the lower part of the rotating shaft, and a plurality of screw holes in which the plurality of support members are capable of being fixed.

9. The rotating shaft lifting jig according to claim 1 , wherein the pedestal has a pedestal main body part which is placed on the inner peripheral surface of the bearing stand, and the pedestal main body part has a shape of a block with a flat jack mounting surface and a curved seating surface which is formed of a curved surface having a part of a cylindrical surface conforming to the inner peripheral surface of the bearing stand.

10. The rotating shaft lifting jig according to claim 4 further comprising a turnbuckle having a pair of butting parts at both ends and that is capable of adjusting a distance between the pair of butting parts, wherein the pair of butting parts is each in contact with the protrusion of the pedestal and the opening of the bearing stand.

11. The rotating shaft lifting jig according to claim 3 , wherein an inner surface of at least a lower half part of the bearing stand has a cylindrical shape concentric with the rotating shaft.

12. The rotating shaft lifting jig according to claim 3 , wherein the rotor receiver is a semi-annular member which covers the outer periphery of the rotating shaft on the lower side in close contact with the rotating shaft.

13. The rotating shaft lifting jig according to claim 6 , wherein the rotor receiver is a semi-annular member which covers the outer periphery of the rotating shaft on the lower side in close contact with the rotating shaft.

14. The rotating shaft lifting jig according to claim 6 , wherein the pedestal has a pedestal main body part which is placed on the inner peripheral surface of the bearing stand, and the pedestal main body part has a shape of a block with a flat jack mounting surface and a curved seating surface which is formed of a curved surface having a part of a cylindrical surface conforming to the inner peripheral surface of the bearing stand.

15. The rotating shaft lifting method according to claim 5 , wherein in a step of providing the plurality of support members, the plurality of support members are disposed with the jack part being interposed therebetween in a peripheral direction of the rotating shaft.

16. The rotating shaft lifting method according to claim 5 , wherein an inner surface of at least a lower half part of the bearing stand has a cylindrical shape concentric with the rotating shaft, and the pedestal has a curved surface having part of a cylindrical surface conforming to an inner peripheral surface of the bearing stand, and wherein the method further comprises a step of fixing the pedestal on the inner peripheral surface of the bearing stand so as to be supported on the bearing stand.

17. The rotating shaft lifting method according to claim 5 , further comprising a step of covering the outer periphery of the rotating shaft on a lower side in close contact with the rotating shaft by the rotor receiver that is a semi-annular member.

18. The rotating shaft lifting method according to claim 5 , wherein the rotor receiver has a cylindrical surface that butts against an outer peripheral surface of the lower part of the rotating shaft, and the rotor receiver includes a plurality of screw holes in which the plurality of support members are capable of being fixed, and wherein the method further comprises the step of fixing each of the plurality of support members in the plurality of screw holes, respectively, to dispose the plurality of support members between the rotor receiver and the bearing stand.

19. The rotating shaft lifting method according to claim 5 , wherein the pedestal has a pedestal main body part which is placed on an inner peripheral surface of the bearing stand, and the pedestal main body part has a shape of a block with a flat jack

Assignees

• Mitsubishi Hitachi Power Sys

Inventors

• Yamasue Shingo
• Kataoka Masahito
• Morimoto Hitoshi

Classifications

• F16C17/24

  with devices affected by abnormal or undesired positions, e.g. for preventing overheating, for safety · CPC title

• B66F3/24 Primary

  fluid-pressure operated (water-pressure machines F03B; hydraulic gearings F16H; cylinders, pistons F16J; fluid-pressure servomotors F15B) · CPC title

• F16C2360/23

  Gas turbine engines · CPC title

• F01D25/285

  Temporary support structures, e.g. for testing, assembling, installing, repairing; Assembly methods using such structures · CPC title

• F16C41/04 Primary

  Preventing damage to bearings during storage or transport thereof or when otherwise out of use · CPC title