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CN-224209454-U - Blade grid assembly fixture for steam turbine

CN224209454UCN 224209454 UCN224209454 UCN 224209454UCN-224209454-U

Abstract

The utility model relates to a blade grid assembly tool for a steam turbine, which relates to the technical field of blade grid assembly and comprises a gantry sliding frame vertically supported at the upper end of a steam turbine shell and horizontally extending along the length direction of the steam turbine shell, a translation sliding seat horizontally sliding and connecting with the gantry sliding frame along the length direction of the gantry sliding frame, a vertical sliding seat vertically sliding and connecting with the translation sliding seat, and a clamping assembly arranged at the lower end of the vertical sliding seat and clamping a stationary blade grid, wherein the clamping assembly comprises semicircular pull heads, winding steel wires uniformly distributed at intervals along the circumferential direction of the circular arc side end of the pull heads and wound in the pull heads, and clamping heads arranged at one ends of the winding steel wires far away from the pull heads, and the clamping heads are fixed at the inner edges of the stationary blade grids. The assembling tool has the beneficial effects that the assembling tool can assemble fixed blade grids with different sizes on the same turbine, and is more convenient.

Inventors

  • HAO WEI
  • XI MENG
  • LIU YUXIANG
  • LI NING
  • Min Guangxin
  • DONG JING
  • ZHAO YANFENG
  • REN ZEMING

Assignees

  • 辽宁大唐国际沈东热电有限责任公司

Dates

Publication Date
20260508
Application Date
20250430

Claims (9)

  1. 1. The blade grid assembly tool for the steam turbine is characterized by comprising a gantry sliding frame (1) vertically supported at the upper end of the steam turbine shell and horizontally extending along the length direction of the steam turbine shell, a translation sliding seat (2) horizontally sliding and connecting with the gantry sliding frame (1) along the length direction of the gantry sliding frame (1), a vertical sliding seat (3) vertically sliding and connecting with the translation sliding seat (2) and a clamping assembly (4) arranged at the lower end of the vertical sliding seat (3) and clamping a stationary blade grid, wherein the clamping assembly (4) comprises semicircular pull heads (41), winding steel wires (42) which are uniformly distributed at intervals along the circumference of the arc side end of the pull heads (41) and wound in the pull heads (41), and clamping heads (43) arranged at one end of the winding steel wires (42) away from the pull heads (41), and the clamping heads (43) are fixed at the inner edges of the stationary blade grid.
  2. 2. The blade grid assembly tooling for the steam turbine according to claim 1, wherein the gantry carriage (1) comprises vertical frames (11) with two ends vertically supported at the upper end of the steam turbine shell, horizontal frames (12) horizontally connected to the tops of the two vertical frames (11) and a stabilizing clamping plate (13) rotatably connected to the bottoms of the two vertical frames (11) which are mutually far away from one side end and are abutted against the side end of the steam turbine shell along with rotation.
  3. 3. A blade grid assembly fixture for a steam turbine according to claim 2, wherein one end face of the stabilizing clamping plate (13) abutting against the side end of the casing of the steam turbine is covered with a buffer rubber layer (131).
  4. 4. The blade grid assembly fixture for the steam turbine, as set forth in claim 2, characterized in that a walking slide way (121) is horizontally arranged on the transverse frame (12), a walking pulley (122) is horizontally arranged on the walking slide way (121) in a sliding manner, the translation slide seat (2) is fixed at the lower end of the walking pulley (122), two long cylinders (21) are vertically arranged at the upper end of the translation slide seat (2) at two sides of the walking pulley (122), piston rods of the long cylinders (21) vertically downwards are connected to the vertical movement slide seat (3), and two short chains (31) connected to the upper end of the pull head (41) are vertically arranged at intervals at the lower end of the vertical movement slide seat (3).
  5. 5. The blade grid assembly fixture for the steam turbine, as set forth in claim 2, characterized in that an auxiliary assembly (5) is slidingly arranged on one end surface of the vertical frame (11) far away from each other along the length direction, the auxiliary assembly (5) comprises an auxiliary frame (51) with upper and lower ends slidingly connected to the vertical frame (11), auxiliary cylinders (52) uniformly and horizontally arranged on one end surface of the auxiliary frame (51) from top to bottom, and auxiliary hauling bars (53) coaxially arranged on the end parts of piston rods of the auxiliary cylinders (52), the auxiliary assembly (5) and the translation sliding seat (2) synchronously slide, and the auxiliary hauling bars (53) translate and are supported on the outer edges of the static blade grids in a butt mode.
  6. 6. The turbine blade grid assembly fixture as set forth in claim 5, wherein a buffer rubber pad (54) is arranged at one end of the auxiliary towing bar (53) far away from the auxiliary cylinder (52), and the inclination angles of the buffer rubber pads (54) on the plurality of auxiliary towing bars (53) from top to bottom become gradually larger.
  7. 7. The blade grid assembly fixture for the steam turbine, as set forth in claim 1, is characterized in that a placement frame (6) for vertically placing the blade grid is arranged at one end of the gantry sliding frame (1), a slot (61) for placing the blade grid is vertically arranged on the placement frame (6), and a positioning clamp group for positioning the blade grids with different sizes is arranged inside the slot (61) by the placement frame (6).
  8. 8. The assembly fixture for the blade grid of the steam turbine according to claim 7, wherein the positioning clamp group comprises two positioning cylinders (62) which are arranged at intervals and positioning clamping pieces (63) which are arranged at the end parts of piston rods of the positioning cylinders (62), the positioning clamping pieces (63) are made of hard rubber, and the two positioning cylinders (62) are arranged in an obliquely upward opposite mode.
  9. 9. The blade grid assembly fixture for the steam turbine, as set forth in claim 7, characterized in that the slot (61) is in a flaring shape along the length direction of the gantry sliding frame (1), and the placing frame (6) is provided with a rubber sheet on the inner wall of the slot (61).

Description

Blade grid assembly fixture for steam turbine Technical Field The utility model relates to the technical field of blade grid assembly, in particular to a blade grid assembly fixture for a steam turbine. Background The steam turbine has several working stages, and there are partition boards between adjacent working stages, and the partition boards have cascade as the core part and the cascade is the interstage passage for steam to enter from the upper stage to the lower stage. The blade cascade can be divided into two types of movable blade cascades (also called working blades for short) and stationary blade cascades (also called guide blade blades) according to the purposes, wherein the movable blade cascades are arranged on a rotor impeller (impulse turbine) or a rotary drum (reaction turbine) and are used for receiving high-speed steam emitted by the stationary blade cascades. The kinetic energy of the steam is converted into mechanical energy for rotating the shaft, which causes the rotor to rotate. The stationary blades are mounted on the diaphragm or the retaining ring sleeve. In the vane cascade, the pressure and temperature of the steam decrease. The flow velocity increases, converting thermodynamic potential energy into kinetic energy. The turbine blade cascade is assembled by inserting individual stator blade cascades into corresponding grooves of a turbine casing, inserting moving blades in alignment with all stator blade cascades, covering the other half of stator blade cascades on the moving blades, and finally fixing the same group of stator blade cascades, so that the assembly of the blade cascades is completed, the stator blade cascades are provided with a plurality of groups, the diameter sizes of the stator blade cascades of each group are different, and the assembly of all stator blade cascades cannot be adapted through conventional tools. Disclosure of utility model First, the technical problem to be solved In view of the defects and shortcomings of the prior art, the utility model provides a blade grid assembly fixture for a steam turbine, which solves the technical problem that a conventional fixture cannot be used for adaptively mounting stationary blade grids with different diameters. (II) technical scheme In order to achieve the above purpose, the main technical scheme adopted by the utility model comprises the following steps: The embodiment of the utility model provides a blade grid assembly tool for a steam turbine, which comprises a gantry sliding frame vertically supported at the upper end of a steam turbine shell and horizontally extending along the length direction of the steam turbine shell, a translation sliding seat horizontally sliding and connecting with the gantry sliding frame along the length direction of the gantry sliding frame, a vertical sliding seat vertically sliding and connecting with the translation sliding seat, and a clamping assembly arranged at the lower end of the vertical sliding seat and clamping a stationary blade grid, wherein the clamping assembly comprises semicircular pull heads, winding steel wires uniformly distributed at intervals along the circumferential direction of the circular arc side end of the pull heads and wound in the pull heads, and a chuck arranged at one end of the winding steel wires far away from the pull heads, and the chuck is fixed at the inner edge of the stationary blade grid. According to the blade grid assembly tool for the steam turbine, when the stator blade grid for the steam turbine is installed through the assembly tool, the whole gantry sliding frame is lifted and fixed at the upper end of the lower casing of the steam turbine, then the translation sliding seat is moved to one side of the casing of the steam turbine, the pull head is moved downwards to be coaxially aligned with the stator blade grid, the clamping heads are pulled out, the clamping heads are respectively fixed at the inner edges of the stator blade grid, the stator blade grid is lifted vertically through the vertical movement sliding seat, and finally the stator blade grid is moved to a designated installation position and is placed in the stator blade grid. Optionally, the longmen balladeur train includes that both ends vertically support in the vertical frame of turbine casing upper end, horizontal connection in two the crossbearer at vertical frame top and rotate connect in two the vertical frame keeps away from the bottom of one side end each other and support in the steady splint of turbine casing side with rotating tightly. Through the bottom rotation setting steady splint of keeping away from one end each other at vertical stand for when the longmen balladeur train supports in turbine casing up end, through rotating steady splint centre gripping in turbine casing side, with the firm degree that improves the longmen balladeur train, it is more stable, safer. Optionally, a buffer rubber layer is covered on an end face of the stabilizing clamp pla