A gas turbine compressor adjustable stator blade angle fixing tool

Abstract

The present invention provides a gas turbine compressor adjustable stator blade angle fixing tool, the fixing tool comprising: a rocker arm, used to adjust the angle of the adjustable stator blade; a hollow connecting rod, connected to the rocker arm, used to limit the adjustment range of the adjustable stator blade; and a sleeve, used to assist the connection between the rocker arm and the adjustable stator blade. The present invention provides an adjustable stator blade angle fixing tool with high precision, convenient use and good installation consistency through the cooperation of the rocker arm and the hollow connecting rod. The adjustable stator blade angle fixing tool has a simple structure and is easy to use. It can quickly and accurately fix the adjustable stator blade to a certain angle, and is easy to disassemble and assemble, and has low cost.

Description

Technical Field

[0001] The invention belongs to the field of compressors, and in particular relates to an adjustable stator blade angle fixing tool for a gas turbine compressor. Background Art

[0002] The compressor variable stator (VSV) mechanism is one of the important anti-surge measures for gas turbines. Under non-design conditions of the compressor, by adjusting the stator installation angle to reduce the inlet airflow angle of the next-stage moving blades, the airflow separation can be effectively suppressed, thereby achieving the function of improving the performance parameters of the compressor and gas turbine under non-design conditions. Most modern gas turbines use a multi-stage adjustable stator structure.

[0003] Working process of adjustable stator blades: Generally, the controller sends instructions to the actuator according to the received temperature, speed and other signals. The joystick of the actuator drives the linkage ring to rotate, and the linkage ring drives the rocker arms of all the guide blades of this stage, so that all the blades rotate synchronously at a corresponding angle. During the assembly process, the adjustable stator blades of each level must first be turned to their respective design angles and fixed before the stator blade tip can be ground. Then, the adjustable stator blades of each level must also be turned to their respective limit angles to determine the initial position of the actuator. Therefore, a device is required to fix the adjustable blades at a predetermined angle.

[0004] In the prior art, a protractor is usually used to measure the angle between the center line of the rocker arm and the center line of the engine, and an adjustable stator is fixed by increasing the tightening torque. This method has the following disadvantages: 1. The error is relatively large. Since the adjustable blade is installed in the circumferential direction, the angle measurement is not flat, and the protractor can only be held by hand and cannot be fixed in position, so there is a large error in the measurement. 2. Increasing the tightening torque will damage the thread at the top of the blade. 3. The consistency is poor.

[0005] Therefore, it is necessary to provide an adjustable stator blade angle fixing tool with high precision, convenient use and good installation consistency. Summary of the invention

[0006] In order to solve the above problems, the present invention aims to provide a gas turbine compressor adjustable stator blade angle fixing tool, the fixing tool comprising:

[0007] Rocker arm, used to adjust the angle of the adjustable stator blades;

[0008] a hollow connecting rod connected to the rocker arm and used to limit the adjustment range of the adjustable stator blade; and

[0009] A sleeve is used to assist the connection between the rocker arm and the adjustable stator blade.

[0010] The gas turbine compressor adjustable stator blade angle fixing tooling provided by the present invention also has the following characteristics: one end of the rocker arm is provided with a through hole for connecting with the adjustable stator blade, and the other end is provided with a fixing piece for connecting with the linkage ring.

[0011] The gas turbine compressor adjustable stator blade angle fixing tool provided by the present invention also has the following characteristics: the diameter of the through hole is larger than the threaded rod at the top end of the adjustable stator blade, and the fixing member is a pin.

[0012] The gas turbine compressor adjustable stator blade angle fixing tool provided by the present invention also has the characteristic that the pin is riveted or welded to the rocker arm.

[0013] The adjustable stator blade angle fixing tooling for a gas turbine compressor provided by the present invention also has the following characteristics: one end of the hollow connecting rod is provided with a connecting hole for connecting to a rocker arm, and the center of the other end is provided with a rectangular hole for limiting the adjustment range of the adjustable stator blade.

[0014] The gas turbine compressor adjustable stator blade angle fixing tool provided by the present invention also has the following characteristics: the width of the rectangular hole is the same as the diameter of the threaded rod at the upper end of the adjustable stator blade, and the length is greater than the sum of the diameters of the two threaded rods.

[0015] The gas turbine compressor adjustable stator blade angle fixing tool provided by the present invention also has the characteristic that the inner diameter of the sleeve is the same as the through hole diameter of the rocker arm.

[0016] The gas turbine compressor adjustable stator blade angle fixing tool provided by the present invention also has the characteristic that the through hole of the rocker arm, the connecting hole of the hollow connecting rod and the sleeve are aligned.

[0017] The gas turbine compressor adjustable stator blade angle fixing tool provided by the present invention also has the following characteristics: the rocker arm, the hollow connecting rod and the sleeve are all made of metal.

[0018] The gas turbine compressor adjustable stator blade angle fixing tool provided by the present invention also has the following characteristics: the rocker arm, the hollow connecting rod and the sleeve are welded and connected, and the angle between the through hole on the rocker arm, the connecting line of the fixing part and the center line of the hollow connecting rod is the angle at which the adjustable stator blade needs to be fixed.

[0019] Beneficial effects:

[0020] The present invention provides an adjustable stator blade angle fixing tool with high precision, easy use and good installation consistency through the cooperation of a rocker arm and a hollow connecting rod. The adjustable stator blade angle fixing tool has a simple structure and is easy to use. It can quickly and accurately fix the adjustable stator blade to a certain angle, and is easy to assemble and disassemble and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 for Figure 2 Schematic diagram of the cross section of the middle BB surface;

[0023] Figure 2 This is a schematic diagram of the structure of the angle fixing tool provided by the present invention;

[0024] Figure 3 A schematic diagram of the angle fixing operation provided by the present invention;

[0025] Among them: 1: adjustable stationary blade; 2: rocker arm; 3: linkage ring; 4: angle fixing work; 5: hollow connecting rod; 6: sleeve. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the following embodiments are combined with the accompanying drawings to specifically illustrate the cutting device provided by the present invention.

[0027] In the description of the embodiments of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the invention.

[0028] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0029] The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0030] like Figure 1-3 As shown, a gas turbine compressor adjustable stator blade angle fixing tool is provided, and the fixing tool comprises:

[0031] The rocker arm 2 is used to adjust the angle of the adjustable stator blade 1;

[0032] A hollow connecting rod 5 connected to the rocker arm 2 and used to limit the adjustment range of the adjustable stator blade 1; and

[0033] The sleeve 6 is used to assist the connection between the rocker arm 2 and the adjustable stator blade 1 .

[0034] In some embodiments, one end of the rocker arm 2 is provided with a through hole for connecting with the adjustable stator blade 1 , and the other end is provided with a fixing piece for connecting with the linkage ring 3 .

[0035] In some embodiments, the diameter of the through hole is larger than the threaded rod at the top end of the adjustable stationary blade 1, and the fixing member is a pin.

[0036] In some embodiments, the pin is riveted or welded to the rocker arm 2 .

[0037] In some embodiments, one end of the hollow connecting rod 5 is provided with a connection hole for connecting with the rocker arm 2, and the center of the other end is provided with a rectangular hole for limiting the adjustment range of the adjustable stator blade 1. The diameter of the connection hole is the same as the through hole of the rocker arm 2.

[0038] In some embodiments, the width of the rectangular hole is the same as the diameter of the threaded rod at the upper end of the adjustable stationary blade 1, and the length is greater than the sum of the diameters of the two threaded rods. The width of the rectangular hole is the same as the threaded rod so that the threaded rod can just pass through the rectangular hole; the length is greater than the sum of the diameters of the two threaded rods to meet the requirement that each end of the hollow connecting rod 5 passes through a threaded rod of the adjustable stationary blade 1.

[0039] In some embodiments, the inner diameter of the sleeve 6 is the same as the diameter of the through hole of the rocker arm 2. The sleeve 6 is a metal ring.

[0040] In some embodiments, the through hole of the rocker arm 2 , the connecting hole of the hollow connecting rod 5 , and the sleeve 6 are aligned.

[0041] In some embodiments, the rocker arm 2, the hollow connecting rod 5 and the sleeve 6 are all made of metal.

[0042] In some embodiments, the rocker arm 2, the hollow connecting rod 5 and the sleeve 6 are welded and connected, and the angle α between the through hole on the rocker arm 2, the connecting line of the fixing member and the center line of the hollow connecting rod 5 is the angle that the adjustable stationary blade 1 needs to be fixed. That is, if the tool is used before the blade tip is ground, the angle α is set to the design angle of the adjustable stationary blade 1, and if the tool is used to determine the limit position of the actuator during assembly, the angle α should be set to the limit angle of the adjustable stationary blade 1.

[0043] Workflow:

[0044] The adjustable stationary blade 1 is installed in the circular mounting hole of the casing, one end of the through hole of the rocker arm 2 passes through the threaded rod at the top of the blade, the metal sheet of the rocker arm 2 is embedded in the rectangular groove of the blade head, and the pin at the other end of the rocker arm 2 is inserted into the hole on the linkage ring 3. The through hole of the angle fixing tool 4 passes through the threaded rod at the top of the adjustable stationary blade 1, and the rectangular hole passes through the threaded rod of the adjacent adjustable blade, and then fixed on the threaded rod of the adjustable stationary blade 1 by a nut. If necessary, a gasket can be added between the rocker arm 2 and the casing to adjust the rotation torque of the blade.

[0045] The holes on the linkage ring 3 that match the pins of the rocker arm 2 are evenly distributed in the circumferential direction, so as long as the angle fixing tool 4 is installed on one blade, the angles of all blades in this stage can be guaranteed to be consistent. Moreover, the angle fixing tool designed in this way has a simple structure, is easy to disassemble and assemble, and has low cost. And the consistency is very good.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A gas turbine compressor adjustable stator blade angle fixing tool, characterized in that: The fixed tooling comprises: Rocker arm, used to adjust the angle of the adjustable stator blades; a hollow connecting rod connected to the rocker arm and used to limit the adjustment range of the adjustable stator blade; and A sleeve is used to assist the connection between the rocker arm and the adjustable stator blade. One end of the rocker arm is provided with a through hole for connecting with the adjustable stationary blade, and the other end is provided with a fixing piece for connecting with the linkage ring. One end of the hollow connecting rod is provided with a connection hole for connecting with the rocker arm, and the center of the other end is provided with a rectangular hole for limiting the adjustment range of the adjustable stator blade. The through hole of the rocker arm, the connecting hole of the hollow connecting rod and the sleeve are aligned.

2. The gas turbine compressor adjustable stator blade angle fixing fixture according to claim 1, characterized in that: The diameter of the through hole is larger than the threaded rod at the top end of the adjustable stationary blade, and the fixing member is a pin.

3. The gas turbine compressor adjustable stator blade angle fixing fixture according to claim 2, characterized in that: The pin is riveted or welded to the rocker arm.

4. The gas turbine compressor adjustable stator blade angle fixing fixture according to claim 1, characterized in that: The width of the rectangular hole is the same as the diameter of the threaded rod at the upper end of the adjustable stationary blade, and the length is greater than the sum of the diameters of the two threaded rods.

5. The gas turbine compressor adjustable stator blade angle fixing fixture according to claim 1, characterized in that: The inner diameter of the sleeve is the same as the diameter of the through hole of the rocker arm.

6. The gas turbine compressor adjustable stator blade angle fixing tool according to claim 1, characterized in that: The rocker arm, the hollow connecting rod and the sleeve are all made of metal.

7. The gas turbine compressor adjustable stator blade angle fixing fixture according to claim 1, characterized in that: The rocker arm, the hollow connecting rod and the sleeve are welded and connected, and the angle between the through hole on the rocker arm, the connecting line of the fixing piece and the center line of the hollow connecting rod is the angle at which the adjustable stator blade needs to be fixed.

Images