JP-7855590-B2 - Device for removing or installing turbine blades

JP7855590B2JP 7855590 B2JP7855590 B2JP 7855590B2JP-7855590-B2

Inventors

ピリホフスカ、ヨアンナシルヴィア
ジエンチョウ、ピョートルクシシュトフ
ペルコフスキー、シモン
モロニー、ダニエルジョン
ヘンドリックス、エリックウェイン

Assignees

ジーイー・ベルノバ・テクノロジー・ゲーエムベーハー
アトランティックプラントメンテナンスインコーポレイテッド

Dates

Publication Date: 20260508
Application Date: 20220117
Priority Date: 20210122

Claims (14)

A device for removing or installing turbine blades from a turbomachinery turbine, wherein the turbomachinery includes an upper half-joint casing and a lower half-joint casing, and includes a casing in which the turbine is housed while the turbine is operating and while the device is in use, An operating head configured to engage with the axial side wall of the turbine blade base, An actuator configured to selectively engage with the axial side wall of the turbine blade base and move an operating head to apply axial force in order to remove or install a turbine blade, A support gantry configured to position the actuator substantially vertically above the turbine blades, A device comprising a support gantry, the turbine being positioned for removal or installation of turbine blades , and the upper half-joint casing being attached to the removed casing.
The apparatus according to claim 1, wherein the support gantry is attached to a portion of the turbomachinery on which the turbine blades are arranged, and the portion of the turbomachinery is adjacent to the turbine or includes at least one of the structures on which the turbine is arranged.
The apparatus according to claim 2, wherein the support gantry is attached to opposing sides of the lower half-joint casing in which the turbine is located and to an exhaust hood adjacent to the turbine.
A device for removing or installing turbine blades from a turbine, wherein the turbomachinery includes an upper half-joint casing and a lower half-joint casing, and the device includes a casing in which the turbine is housed while the turbine is operating and while the device is in use, An operating head configured to engage with the axial side wall of the turbine blade base, An actuator configured to selectively engage with the axial side wall of a turbine blade base and apply an axial force to the turbine blade base in order to remove a turbine blade from the turbine or to install a turbine blade, A support gantry configured to position an actuator substantially vertically above the turbine blades, wherein the turbine is positioned for removal or installation of the turbine blades , and the support gantry is configured to be attached to the casing from which the upper half-joint casing has been removed , Includes, The actuator further, A mounting member configured to be connected to a support gantry, A sliding system configured to allow the operating head to slide relative to the mounting member, A linear actuator configured to selectively move a slide system axially relative to a mounting member in order to apply an axial force, Equipped with, The operating head includes an arm operably coupled to an actuator, the actuator further includes a coupler configured to selectively position a mounting member between a first state and a second state, in the first state, the mounting member is fixed axially pivotably to a support portion extending axially to a support gantry, and the arm extends substantially perpendicularly adjacent to a first stage of a plurality of turbine blade stages. In the second state, the mounting member is pivotable with respect to a support member extending in the axial direction, the arm is positioned radially outward from the turbine blades on the turbine, and is movable in the axial direction along the support member extending in the axial direction of the support gantry. In a second state, the actuator is movable along an axially extending support member to position it relative to a different second stage of a plurality of turbine blades.
A device for removing or installing turbine blades from a turbine, wherein the turbomachinery includes an upper half-joint casing and a lower half-joint casing, and includes a casing in which the turbine is housed while the turbine is operating and while the device is in use, The operating head, which includes an arm, is configured to engage with the axial side wall of the turbine blade base. An actuator configured to selectively engage with the axial side wall of the turbine blade base and apply an axial force to the turbine blade base in order to remove or install the turbine blade, With the upper half-joint casing removed and the turbine positioned within the casing, a support gantry is configured to position the actuator substantially vertically above the turbine blades, Includes, The actuator further, A mounting member configured to be connected to a support gantry, A coupler configured to selectively position a mounting member between a first state and a second state, Equipped with, In the first state, the mounting member is fixed to a support portion extending axially from the support gantry so as to be pivotable in the axial direction, and the arm extends substantially perpendicularly adjacent to the first stage of a plurality of turbine blade stages. In the second state, the mounting member is pivotable with respect to a support member extending in the axial direction, the arm is located radially outward of the turbine blades on the turbine, and the arm is movable in the axial direction along the support member extending in the axial direction of the support gantry. In a second state, the actuator is movable along an axially extending support member to position it relative to a different second stage of a plurality of turbine blades.
The apparatus according to claim 5, further comprising a vibration assembly including a vibration drive mechanism coupled to an arm.
The apparatus according to claim 5, wherein the operating head includes a vertically extending arm operably coupled to an actuator, the vertically extending arm being selectable from a set of arms of multiple different lengths.
The actuator further, A sliding system configured to allow the operating head to slide relative to the mounting member, A linear actuator configured to selectively move the slide system axially relative to the mounting member, The apparatus according to claim 7 , including the following:
The apparatus according to claim 5, characterized in that the support gantry is attached to a plurality of opposing sides of the lower half-joint casing in which the turbine is located, and to an exhaust hood adjacent to the turbine.
A method for removing or installing turbine blades from a turbomachinery turbine, comprising an upper half-joint casing and a lower half-joint casing, and including a casing in which the turbomachinery turbine is housed during at least one of the removal or installation while the turbine is in operation, the method is A step of attaching the device to a part of a turbomachinery while the upper half-joint casing is removed, the device comprising: an operating head configured to engage with the axial side wall of a turbine blade base; an actuator configured to selectively engage with the axial side wall of a turbine blade base and move the operating head to apply an axial force to the turbine blade base; and a support gantry configured to position the actuator and the operating head substantially vertically above the turbine blades; The steps of mechanically acting the turbine blade base relative to the turbomachine by applying an axial force to the turbine blade base via an operating head so that the turbine blade base moves in or out of the rotor wheel of the first stage of the turbine blade, A method that includes this.
The steps include coupling the vibration assembly to the operating head of the device, The steps include applying axial force and simultaneously vibrating the turbine blade base, The method according to claim 10 , including
The method according to claim 10 , further comprising a stage for moving an operating head to engage with a turbine blade base before mechanically operating the turbine blade base.
A method for attaching or removing turbine blades from a turbomachinery turbine, A step of attaching an apparatus to a part of a turbomachinery when the upper half-joint casing of the turbomachinery has been removed, the apparatus comprising: an operating head configured to engage with the axial side wall of the turbine blade base; an actuator configured to selectively engage with the axial side wall of the turbine blade base and move the operating head to apply an axial force to the turbine blade base; and a support gantry configured to position the actuator and the operating head substantially vertically above the turbine blades, The steps of mechanically acting the turbine blade base relative to the turbomachine by applying an axial force to the turbine blade base via an operating head including an arm extending from an actuator, so that the turbine blade base moves in or out of the rotor wheel of the first stage of the turbine blade, The steps include performing a first rotation of the actuator to rotate the arm from a first operating position adjacent to the rotor wheel of the first stage of the turbine blade to a position radially outward of the turbine blade, The steps include moving the actuator axially along a support member extending axially from the support gantry to a non-operating position where the arm is radially outward and axially on another second stage of the turbine blade of the turbomachine, The steps include performing a second rotation of the actuator so as to rotate the arm from a non-operating position to a second operating position adjacent to a different second-stage turbine blade, The process involves repeatedly mechanically acting the turbine blade base relative to the turbomachine by applying an axial force to the turbine blade base via an operating head so that the turbine blade base moves into or out of the rotor wheel of a different second stage turbine blade, A method that includes this.
The method according to claim 13 , wherein the installation includes the step of attaching a support gantry to a plurality of opposing sides of the lower half-joint casing in which the turbine is located and to an exhaust hood adjacent to the turbine in the turbomachinery.

Description

This disclosure generally relates to the removal of turbine blades in a turbomachinery assembly, and more particularly to an apparatus for removing or installing turbine blades from a turbine within a turbomachinery. Turbomachinery turbine rotors are often machined from large forgings. The rotor wheels cut from the forgings typically have grooves for mounting the turbine blade bases. As the demands for increased turbine power and improved turbine performance continue to grow, turbomachinery is increasingly fitted with larger and more articulated turbine blades. Dynamic properties influencing the design of these downstream turbine blades include the various blade profiles and external shapes used in turbomachinery, which can affect the fluid velocity profile and other characteristics of the working fluid within the system. In addition to the blade profile, other characteristics such as the effective length of the blades, the pitch diameter of the blades, and the high operating speed of the blades in both supersonic and subsonic flow regions can also significantly impact system performance. Damping and blade fatigue are other properties that play a role in the mechanical design of the blade and its profile. These mechanical and dynamic response characteristics, as well as other properties, all influence the relationship between performance and the turbine blade's surface profile. As a result, the profiles of latter-stage turbine blades often include complex blade geometries designed to improve performance while minimizing losses under a wide range of operating conditions. The application of complex blade geometries to turbine blades, particularly latter-stage turbine blades, presents specific challenges in assembling and disassembling these blades on the rotor wheel. For example, adjacent turbine blades on a rotor wheel are typically connected to each other by cover bands or interlocking tip shrouds positioned around the outer circumference of the blades to confine the working fluid within a well-defined path and increase blade rigidity. These interlocking shrouds can hinder the direct assembly and disassembly of blades mounted on the rotor wheel. Furthermore, the inner platforms and dovetail slots of these blades are often angled relative to the axis of the turbine rotor wheel to which they are mounted, which can also hinder assembly onto the rotor wheel. In many cases, turbine blades must be removed one at a time. The working environment in which turbine blades are used can cause corrosion and thermal distortion, requiring significant force to disassemble the blades. One method of removing or installing turbine blades requires forcing the blades axially by applying force to other parts of the turbine, such as the adjacent rotor wheel. Applying force to adjacent structures can damage them. Another approach involves cantilevering a removal or installation device to a portion of the turbine's half-joint casing, i.e., at the 3 o'clock or 9 o'clock position relative to the turbine axis. This latter approach requires rotating the turbine to position each turbine blade at the 3 o'clock or 9 o'clock position, so that the turbine blades extend roughly horizontally from the rotor wheel in a cantilevered manner. As a result, the weight of the turbine blades works against the removal or installation of the turbine blades by applying torque to the dovetail connection at the base of the turbine blades, requiring a greater axial force to remove the turbine blades. Furthermore, supporting the turbine blades during removal and/or installation is extremely difficult to prevent them from falling or rotating in a way that could damage the turbine blades, rotor wheel, half-joint casing, or other components of the turbine. If the turbine blades are mounted in angled dovetail slots (i.e., dovetail slots relative to the turbine axis), the rotor must be rotated when inserting or removing the turbine blades, which is extremely difficult if the blades are generally horizontal. One aspect of this disclosure provides an apparatus for removing or installing turbine blades from a turbomachinery turbine, the apparatus comprising: an operative head configured to engage with the axial sidewall of a turbine blade base; an actuator configured to selectively engage with the axial sidewall of a turbine blade base and move the operative head to apply an axial force to the turbine blade base in order to remove or install a turbine blade; and a support gantry configured to position the actuator substantially vertically above the turbine blade in a position within the turbomachinery. Another aspect of the present disclosure provides a device for removing or installing a turbine blade from a turbine. The device includes an operating head configured to engage with the axial side wall of a turbine blade base, the operating head including an arm, and an actuator configured to move the operating head to selectively engage with the axial side wall of a t