CN220825942U - Centering and mounting device for inner ring of first-stage stator blade of gas turbine - Google Patents

Abstract

A centering and mounting device for the inner ring of a first-stage stator blade of a gas turbine. When the turbine first-stage stationary blade is installed, the installation accuracy is high, meanwhile, the control parameters are too many, the artificial influence factor is large during installation, and the adjustment period is long. If the installation process is not controlled in place, a great potential safety hazard exists in equipment. The utility model comprises a hexagonal support frame (1), wherein each two opposite sides of the hexagonal support frame are connected with an adjusting rod (2); the adjusting rod comprises an adjusting screw sleeve (24), two ends of the adjusting screw sleeve are respectively in threaded connection with a screw rod (23), the end part of each screw rod is rotatably connected with a connecting plate (22), and two hook plates (21) are fixed on the connecting plate. The utility model is used for centering and installing the inner ring of the first-stage stator blade of the gas turbine.

Description

Centering and mounting device for inner ring of first-stage stator blade of gas turbine

Technical Field

The utility model relates to a centering and mounting device for an inner ring of a first-stage stationary blade of a gas turbine.

Background

SGT5-4000F (4+) gas turbine, which adopts single-shaft, single-cylinder, axial exhaust, cold end driving and double-bearing support (the compressed air end is a radial/support combined bearing). The gas turbine consists of a compressor, a combustion chamber and a turbine. Standard service of gas turbines is generally divided into minor, medium and major repairs. And respectively executing different levels of overhauling according to the actual equivalent operating hours and the starting times of the unit. When the SGT5-4000F (4+) type gas turbine is in middle repair, the 4-stage movable blades, the stationary blades and the first-stage guide ring of the turbine are required to be replaced, so that the thermal components of the gas turbine are ensured to be in a reliable running state. The blade root of the turbine first-stage stator blade is fixed on the turbine cylinder body, the 6 inner rings are arranged on the top of the turbine first-stage stator blade, the process is complex when the turbine first-stage stator blade and the inner rings are arranged, the gap between the blades, the radial gap of the blades, the concentricity of the stator blade sealing ring and the swinging value of the turbine first-stage stator blade are ensured by adjusting the eccentric pins, so that the safe operation of the gas turbine is ensured.

When the turbine first-stage stationary blade is installed, the installation accuracy is high, meanwhile, the control parameters are too many, the artificial influence factor is large during installation, and the adjustment period is long. If the installation process is not controlled in place, the equipment has great potential safety hazard, and once the equipment of the gas turbine body is in accident, huge economic loss is caused.

Disclosure of utility model

The utility model aims to provide a centering and mounting device for an inner ring of a first-stage stationary blade of a gas turbine, which aims to solve the technical problems.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the centering and mounting device for the inner ring of the first-stage stationary blade of the gas turbine comprises a hexagonal support frame, wherein each two opposite sides of the hexagonal support frame are connected with an adjusting rod;

The adjusting rod comprises an adjusting screw sleeve, two ends of the adjusting screw sleeve are respectively connected with screw threads, the end part of each screw is rotatably connected with a connecting plate, and two hook plates are fixed on the connecting plate.

The inner ring centering installation device of the turbine first-stage stationary blade of the gas turbine is characterized in that the screw thread directions of the two screws are opposite.

The gas turbine first-stage stationary blade inner ring centering installation device is characterized in that the hooking plate is an L-shaped plate.

Advantageous effects

1. According to the utility model, each adjusting rod can simultaneously control the two arc sections of the inner ring of the stator blade to move simultaneously, so that 6 arc sections of the whole circle of the inner ring of the stator blade of the turbine can be adjusted and conveniently centered.

2. The utility model has simple structure and can be suitable for searching the inner rings of the static blades with different blade lengths.

Drawings

FIG. 1 is a top view of the present utility model;

FIG. 2 is a schematic diagram of the structure of the present utility model;

FIG. 3 is a front view of the present utility model;

FIG. 4 is a schematic view of the structure of the present utility model in use;

In the figure: 1. a hexagonal support frame; 2. an adjusting lever; 3. a vane inner ring; 21. a hook plate; 22. a connecting plate; 23. a screw; 24. and adjusting the screw sleeve.

Description of the embodiments

Referring to fig. 1-3, a centering and mounting device for a first-stage stator blade inner ring of a gas turbine comprises a hexagonal support frame 1, wherein each two opposite sides of the hexagonal support frame are connected with adjusting rods 2, three adjusting rods are arranged in total, and the three adjusting rods are distributed in a staggered manner up and down, so that the three adjusting rods can be prevented from being influenced when operated;

The adjusting rod comprises an adjusting screw sleeve 24, the adjusting screw sleeve is respectively connected with two opposite sides through bearings, two ends of the adjusting screw sleeve are respectively connected with screw rods 23 in a threaded mode, the screw threads of the two screw rods are opposite in direction, two inner screw threads with opposite directions are formed in the two inner sides of the adjusting screw sleeve, the inner screw threads of the adjusting screw rods are matched with the outer screw threads of the screw rods on the corresponding sides, the end portions of each screw rod are rotatably connected with a connecting plate 22, the rotatable connection is arranged to be connected through the bearings, two hook plates 21 are fixed on the connecting plates, the hook plates are L-shaped plates, and the hook plates are welded with the connecting plates;

When the turbine stator blade is used, referring to FIG. 4, the turbine primary stator blade is installed through the eccentric pin of the blade root, after the installation of the whole circle is completed, the turbine primary stator blade inner ring is installed, the whole circle of the turbine stator blade inner ring is divided into 6 arc sections, when the stator blade inner ring is installed, the inner ring is preassembled on the stator blade support angle, a stainless steel gasket with a certain thickness is temporarily placed at the joint of the stator blade inner ring section, and the gap between the stator blade inner rings is ensured to meet the requirement;

The adjusting screw sleeve of each adjusting rod is rotated to enable the distance between the two screws to be adjusted, the hooking plates are hooked on the arc sections of the stator blade inner ring 3, each adjusting rod can hook the arc sections of the two stator blade inner rings, the three adjusting rods can hook the 6 arc sections of the stator blade inner ring, the adjusting screws are adjusted, the two connecting plates move in opposite directions respectively, the 6 arc section stator blade inner rings are tightened, the inner rings initially form a circle, concentricity is measured through the dial indicator, then each adjusting rod is adjusted one by one according to concentricity measurement results, the concentricity of the stator blade inner rings is in the design deviation, then eccentric pins of the inner rings are screwed in different directions one by one, the eccentric pins are contacted with the stator blade inner ring adjusting tool is disassembled, and after the repeated measurement concentricity meets the requirements, the stator blade inner ring eccentric pins are punched and riveted and fixed. The method can rapidly complete the centering work of the stator blade inner ring, and save the overhaul period.

Claims (3)

1. A gas turbine first-stage stationary blade inner ring centering installation device is characterized in that: the device comprises a hexagonal support frame, wherein each two opposite sides of the hexagonal support frame are connected with an adjusting rod;

The adjusting rod comprises an adjusting screw sleeve, two ends of the adjusting screw sleeve are respectively connected with screw threads, the end part of each screw is rotatably connected with a connecting plate, and two hook plates are fixed on the connecting plate.

2. The gas turbine first stage vane inner ring centering and mounting device of claim 1, characterized by: the screw threads of the two screws are opposite in direction.

3. The gas turbine first stage vane inner ring centering and mounting device of claim 2, characterized by: the hook plate is an L-shaped plate.