CN220151608U - Adjustable stator blade fixing clamp of gas turbine - Google Patents

Abstract

The utility model relates to the technical field of auxiliary equipment of gas turbines and discloses a fixing clamp for adjustable stator blades of gas turbines, which comprises a clamp body, wherein the clamp body is in a fan ring shape, a plurality of groups of limiting grooves are uniformly formed in the side wall of the clamp body along the circumferential direction, the limiting grooves are obliquely arranged and penetrate through the inner side wall and the outer side wall of the clamp body, a first groove is formed in the top end of one side wall of each limiting groove, and a second groove is formed in the top end of the other side wall of each limiting groove. According to the utility model, the adjustable stator blade can be fixed in the process of mounting or dismounting the adjustable stator blade, so that the collision between the blade and the casing is avoided, the operation by a single person is convenient, and the mounting or dismounting efficiency and the operation safety of the adjustable stator blade are effectively improved.

Description

Adjustable stator blade fixing clamp of gas turbine

Technical Field

The utility model relates to the technical field of auxiliary equipment of gas turbines, in particular to an adjustable stator blade fixing clamp of a gas turbine.

Background

The gas turbine is an internal combustion type power machine which takes continuously flowing gas as working medium to drive an impeller to rotate at high speed and convert the energy of fuel into useful work, and is a rotary impeller type heat engine, wherein stator blades are non-rotating parts in a gas compressor and are used for rectifying and diffusing the air flow compressed by the movable blades; the adjustable stator blade is different from the traditional stator blade, the angle of the blade can be adjusted by the control system during operation to adjust the distribution and flow of inlet air, and the aerodynamic characteristics of the gas turbine are optimized to adapt to different working condition demands, so that the efficiency and power output of the gas turbine are improved. Each adjustable stator blade in each stage of the gas turbine is fixed on the same annular ring outside the casing through a nut, so that the blades of each stage can act simultaneously.

At present, when processing traditional stator blade, there is the difficult fixed problem, the easy damage that causes stator blade, consequently, the patent of application number 201720260289.X appears, this chinese patent discloses a stator blade ring anchor clamps, including the anchor clamps base, the arc anchor clamps support, the cambered surface presss from both sides the frame, connect the locking frame, top locating clip, the anchor clamps base is equipped with the arc anchor clamps support, the arc anchor clamps support comprises the arc fixed boss, fixed support boss and fixed lacing wire boss, the arc fixed boss, fixed support boss and fixed lacing wire boss are ladder structure, the arc fixed boss is equipped with arc blade groove and locating hole, fixed support boss intrados end is equipped with cambered surface clamping frame reference column, fixed lacing wire boss top surface is equipped with the lacing wire groove, the cambered surface clamping frame is fixed on the arc fixed boss top surface, cambered surface clamping frame top tight cambered surface clamping frame reference column, be equipped with two at least connection locking frames on lacing wire groove and the locating hole, be equipped with two at least top locating clips on the fixed support boss. The problem of stator blade processing fixed has been solved to above-mentioned patent, guarantees blade groove size uniformity, effectively improves product quality, has improved production efficiency, but can not be applied to adjustable stator blade installation or disassemble in-process.

The prior art has at least the following problems: in the process of installing or dismantling the adjustable stator blade, as the blade is fastened on the annular ring through the bolts, the tightening torque of the bolts is larger, when one blade is unscrewed, the blade can drive the annular ring to move, the movement of the annular ring can lead the blade of the whole stage to simultaneously rotate towards one direction, if the nut is given a larger force, the blade can be led to rotate to the limit position and collide with the casing, and the whole stage blade and the casing can be damaged to a certain extent. The current mode of installing or dismantling the blade of the adjustable stator blade is that two persons cooperate, one person installs or dismounts the nut, the other person fixes the blade, because the blade cannot be fixed by using too hard materials due to the special structure of the blade, the other person needs to fix the blade by hands or holding a wood block with a groove, and then one person loosens the nut one by one; the two persons cooperate to mount or dismount the adjustable stator blades, so that the efficiency is low, the probability of collision between the blades and the casing still exists, the blades are sharp, and certain potential safety hazards exist when the blades are fixed by hands or wood blocks.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model develops the adjustable stator blade fixing clamp of the gas turbine, which can fix the adjustable stator blade of the gas turbine, avoid collision between the blade and the casing, facilitate single operation and effectively improve the installation or disassembly efficiency and the operation safety of the adjustable stator blade.

The technical scheme for solving the technical problems is as follows: the utility model provides an adjustable stator blade mounting fixture of gas turbine, includes the anchor clamps body, and the anchor clamps body is the fan ring shape, evenly is equipped with a plurality of groups spacing groove along the circumferencial direction on the lateral wall of anchor clamps body, and spacing groove slope sets up, runs through the inside wall and the lateral wall of anchor clamps body, and the lateral wall top of spacing groove one side is equipped with first recess, and the lateral wall top of opposite side is equipped with the second recess.

As an optimization, the first groove is an arc-shaped groove. Through setting up circular-arc recess, can adapt to the edge radian of adjustable stator blade.

As optimization, the top of the first groove is tangent to the top of the limit groove, and a fillet is arranged at the joint of the bottom and the side wall of the limit groove. The edge radian of the adjustable stator blade can be better adapted, and the adjustable stator blade is protected.

As optimization, the second groove is a rectangular groove, two side walls of the second groove are arc-shaped, a round corner is arranged at the joint of the top of the second groove and the top of the limit groove, and a round corner is arranged at the joint of the bottom of the second groove and the side wall of the limit groove. Can reserve certain rotation space when rotating the nut, the edge radian of better adaptation adjustable stator blade protects adjustable stator blade.

As optimization, the bottom end of the side wall on one side of the limit groove is provided with a chamfer. The bottom end of the side wall on one side of the limit groove is prevented from damaging the blade.

As optimization, the inclination angle of the limiting groove is 30-80 degrees.

Compared with the prior art, the utility model has the following beneficial effects:

the clamp body is in a fan ring shape, a plurality of groups of limit grooves corresponding to the adjustable stator blades can be circumferentially arranged, and a plurality of groups of adjustable stator blades can be limited at one time, so that the adjustable stator blades of the whole stage are limited; the limiting groove is obliquely arranged, so that the adjustable stator blade can be contained to limit the adjustable stator blade, when the corresponding nut is unscrewed, the adjustable stator blade is prevented from rotating along with the nut to influence the unscrewing of the nut, the adjustable stator blade of the whole stage is prevented from rotating along with the nut, the adjustable stator blade is prevented from colliding with the casing after rotating to the limit position, and the whole stage blade and the casing are damaged; through setting up first recess and second recess, can hold the arc limit of blade.

Drawings

Fig. 1 is a front view of an embodiment of the present utility model.

Fig. 2 is a top view of an embodiment of the present utility model.

Fig. 3 is a partial enlarged view of the area a in fig. 1.

In the figure 1, a clamp body; 2. a limit groove; 3. a first groove; 4. a second groove; 5. chamfering.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present utility model will be described in detail below with reference to the following detailed description and the accompanying drawings.

Example 1

Fig. 1 to 3 are schematic diagrams of an embodiment of the present utility model, as shown in fig. 1 and 2, a fixing clamp for an adjustable stator blade of a gas turbine, including a clamp body 1, where the clamp body 1 is in a fan shape, a plurality of groups of limiting grooves 2 are uniformly arranged on a side wall of the clamp body 1 along a circumferential direction, the limiting grooves 2 are obliquely arranged, penetrate through an inner side wall and an outer side wall of the clamp body 1, a first groove 3 is arranged at a top end of a side wall on one side of the limiting grooves 2, and a second groove 4 is arranged at a top end of a side wall on the other side. By arranging the clamp body 1 in a fan ring shape, a plurality of groups of limit grooves 2 corresponding to the stator blades can be circumferentially arranged; the limiting groove 2 is obliquely arranged, so that the blades can be limited, when the corresponding nuts are unscrewed, the follow-up rotation of the blades is prevented, the unscrewed nuts are prevented from being influenced, the follow-up rotation of the blades of the whole stage is avoided, the blades collide with the casing after rotating to the limit position, and the structures of the blades of the whole stage and the casing are damaged; by providing the first recess 3 and the second recess 4, the edges of the adjustable stator vane having a large rotational amplitude can be accommodated.

As shown in fig. 3, the first groove 3 is an arc-shaped groove. Through setting up circular-arc recess, can adapt to the edge radian of adjustable stator blade.

The top of the first groove 3 is tangent with the top of the limit groove 2, and a round corner is arranged at the joint of the bottom and the side wall of the limit groove 2. The edge radian of the adjustable stator blade can be better adapted, and the adjustable stator blade is protected.

The second groove 4 is a rectangular groove, two side walls of the second groove 4 are arc-shaped, a round corner is arranged at the joint of the top of the second groove 4 and the top of the limit groove 2, and a round corner is arranged at the joint of the bottom and the side walls of the limit groove 2. When the nut is rotated, a certain rotating space is reserved for the adjustable stator blade, the edge radian of the adjustable stator blade is better adapted, and the adjustable stator blade is protected.

The bottom end of the side wall on one side of the limit groove 2 is provided with a chamfer 5. Chamfer 5 can avoid the lateral wall bottom damage blade in spacing groove 2 one side.

The inclination angle of the limiting groove 2 is 60 degrees. Through setting up inclination for 60, can make things convenient for the staff to insert spacing groove 2 to adjustable stator blade's middle part.

When the stator blade fixing clamp is used, a fixing clamp with a corresponding size is found according to the number of stages of the adjustable stator blade, the fixing clamp is manufactured by processing bakelite, and the bakelite has the characteristics of high hardness, no water absorption, heat resistance, corrosion resistance, good plasticity and the like, and the mechanical strength is higher than that of common wood, but lower than that of the blade, so that the damage to the blade in the working process is reduced; after a fixed clamp with a corresponding size is found, the whole blade is adjusted to an angle in which the fixed clamp can be placed through an annular ring outside the casing, the clamp body 1 and the whole-stage adjustable stator blade are concentrically aligned, a limiting groove 2 on the clamp body 1 corresponds to the middle part of the adjustable stator blade, then the limiting groove 2 is sleeved in the middle part of the adjustable stator blade, and the clamp body 1 which is in a fan ring shape is provided with the limiting groove 2 corresponding to the adjustable stator blade, so that a plurality of groups of adjustable stator blades can be limited at one time; because each adjustable stator blade is connected with each other through the annular ring, the purpose of limiting the whole-stage blades can be achieved only by limiting two groups of adjustable stator blades, and in order to enhance the limiting effect, limiting grooves 2 with the same number as half-stage adjustable stator blades are arranged on the clamp body 1, so that materials can be saved under the condition of ensuring the limiting effect, the weight of the clamp body 1 is reduced, and the labor capacity of workers is reduced; the annular ring outside the casing is fixed when the position of the whole-stage adjustable stator blade is fixed, when a worker installs or disassembles a certain adjustable stator blade, the nut outside the casing corresponding to the adjustable stator blade is screwed, the adjustable stator blade is limited by the limiting groove 2, only small-amplitude rotation can be carried out in the limiting groove 2, the annular ring cannot be driven to move, the annular ring cannot move in a displacement mode, the whole-stage adjustable stator blade cannot rotate in one direction at the same time, the possibility of collision between the adjustable stator blade and the casing is completely avoided, only one person is required for operation in installation or disassembly, the working efficiency is improved, and the potential safety hazard is reduced.

The description of the orientation or relative positional relationship of the structures in the present utility model, such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., is based on the orientation or positional relationship shown in the drawings, is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the structures referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Claims (6)

1. An adjustable stator blade fixing clamp of a gas turbine is characterized in that: including anchor clamps body (1), anchor clamps body (1) are the fan ring-type, evenly are equipped with a plurality of groups of spacing groove (2) along circumferencial direction on the lateral wall of anchor clamps body (1), and spacing groove (2) slope sets up, runs through the inside wall and the lateral wall of anchor clamps body (1), and the lateral wall top of spacing groove (2) one side is equipped with first recess (3), and the lateral wall top of opposite side is equipped with second recess (4).

2. The adjustable stator blade attachment clamp for a gas turbine engine of claim 1, wherein: the first groove (3) is an arc-shaped groove.

3. The adjustable stator blade attachment clamp for a gas turbine engine of claim 2, wherein: the top of the first groove (3) is tangent to the top of the limit groove (2), and a round corner is arranged at the joint of the bottom of the first groove (3) and the side wall of the limit groove (2).

4. The adjustable stator blade attachment clamp for a gas turbine engine of claim 3, wherein: the second groove (4) is a rectangular groove, two side walls of the second groove (4) are arc-shaped, a round corner is arranged at the joint of the top of the second groove (4) and the top of the limit groove (2), and a round corner is arranged at the joint of the bottom of the second groove (4) and the side walls of the limit groove (2).

5. The adjustable stator blade attachment clamp for a gas turbine engine of claim 1, wherein: the bottom end of the side wall on one side of the limit groove (2) is provided with a chamfer (5).

6. The adjustable stator blade attachment clamp for a gas turbine engine according to any one of claims 1-5, wherein: the inclination angle of the limiting groove (2) is 30-80 degrees.