Rotation angle measuring device for adjustable stator blade of gas compressor

Abstract

The utility model provides a rotation angle measuring device for an adjustable stator blade of a gas compressor. The rotation angle measuring device comprises a dial, an indication structure and a calibration structure, wherein the dial is arranged on the compressor casing; the indication structure is connected with the adjustable stator blade and can rotate along with the adjustable stator blade, so that the indication structure has an indication function of indicating the rotation angle of the adjustable stator blade relative to the position change of the dial; the calibration structure is fixed to the cartridge receiver, and the dial can move relative to the calibration structure so that the zero graduation line on the dial can coincide with the pointing direction of the indication structure. The rotation angle measuring device can conveniently realize calibration of the dial.

Description

TECHNICAL FIELD

[0001] The utility model relates to a compressor, especially a kind of angle measuring device of adjustable stator blade of compressor. BACKGROUND

[0002] A plurality of rocker arms are usually arranged on the compressor of aeroengine, one end of each rocker arm is connected with the part of stator blade that extends from the compressor casing, and a linkage ring connected to the compressor casing is arranged.The other end of each rocker arm is connected with the linkage ring, and the linkage ring is driven to rotate by the actuator connected with the linkage ring, which synchronously drives each rocker arm to swing, so as to synchronously change the angle of each stator blade, to realize the adjustment of compressor inlet flow.To realize the accurate control of compressor inlet flow, the angle of each stator blade that rotates must be known exactly.At present, the value of rotation angle is obtained by angle displacement measuring device.

[0003] However, the conventional angle displacement measuring device may have errors in measuring the rotation angle of adjustable stator blade, which may lead to reading drift, and further cause performance loss or data analysis deviation, and reduce the aerodynamic performance of compressor. SUMMARY

[0004] The utility model aims at providing a kind of angle measuring device of adjustable stator blade of compressor, and the calibration of dial can be conveniently realized.

[0005] One aspect of the utility model provides a kind of angle measuring device of adjustable stator blade of compressor, including dial, indicating structure and calibration structure;Wherein, the dial is arranged in compressor casing;The indicating structure is connected with the adjustable stator blade, and the indicating structure can rotate along with the adjustable stator blade, so that the position change of the indicating structure relative to the dial has the indicating effect of indicating the rotation angle of the adjustable stator blade;The calibration structure is fixed to the casing, and the dial can be moved relative to the calibration structure, so that the zero scale line on the dial and the pointing of the indicating structure coincide.

[0006] In an embodiment, the calibration structure includes first calibration member and second calibration member;The first calibration member and the second calibration member are arranged along the circumference of the journal of the adjustable stator blade.

[0007] In an embodiment, the casing is provided with first calibration hole and second calibration hole;The first calibration member and the first calibration hole are interference fit, and the second calibration member and the second calibration hole are interference fit.

[0008] In an embodiment, the scale disc comprises a scale indicating component and a calibration component; the calibration component has a circular arc side surface; the circular arc side surface can contact the first calibration piece and the second calibration piece and slide along a circle under the guidance of the first calibration piece and the second calibration piece.

[0009] In an embodiment, the scale indicating component is arranged in the circumferential direction of the shaft journal of the adjustable stator blade.

[0010] In an embodiment, the angle measuring device further comprises a locking structure; the locking structure presses the calibration component on the casing to fix the scale disc.

[0011] In an embodiment, the locking structure comprises a locking bolt; the calibration component of the scale disc is provided with a first locking hole, and the casing is provided with a second locking hole; the locking bolt passes through the first locking hole and the second locking hole to fix the scale disc.

[0012] In an embodiment, the locking bolt is two; the two locking bolts are connected to each other through a locking wire.

[0013] In an embodiment, the indicating structure is provided with a mounting hole; the mounting hole passes through the shaft journal of the adjustable stator blade, and the indicating structure is sleeved on the shaft journal of the adjustable stator blade through the mounting hole.

[0014] In an embodiment, the indicating structure is located above the scale disc.

[0015] The scale disc of the angle measuring device of the adjustable stator blade of the compressor can be operatively moved relative to the calibration structure, the calibration of the scale disc is realized by the indicating structure pointing to the zero scale line of the scale disc, the zeroing is more accurate, the performance loss or data analysis deviation caused by reading drift is eliminated, the subsequent work is reliable, the blade angle can be controlled, the compressor performance can be improved, and the calibration process is simple. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and other features, properties and advantages of the present application will become more apparent through the following description with reference to the drawings and embodiments, in which:

[0017] Figure 1 is a cross-sectional view of a compressor structure;

[0018] Figure 2 is a schematic view of an embodiment of the angle measuring device of the adjustable stator blade of the compressor according to the present application;

[0019] Figure 3 is Figure 2Top view of the angle measuring device shown;

[0020] Figure 4 yes Figure 2 A cross-sectional view of the angle measuring device shown. Detailed Implementation

[0021] Figure 1 The structure of the compressor is shown. (Example) Figure 1 As shown, an aero-engine compressor typically has multiple rocker arms 4. One end of each rocker arm 4 is connected to the portion of a stator blade extending out of the compressor casing 1, and a linkage ring is connected to the compressor casing 1. The linkage ring is connected to the other end of each rocker arm 4. An actuator connected to the linkage ring drives the linkage ring to rotate, synchronously causing each rocker arm 4 to swing, thereby synchronously changing the angle of each stator blade to regulate the compressor inlet flow. To achieve precise control of the compressor inlet flow, the exact rotation angle of each stator blade is required. Currently, the magnitude of the rotation angle is obtained through an angular displacement measuring device.

[0022] However, traditional angular displacement measurement devices may contain errors in measuring the rotation angle of adjustable stator blades, leading to reading drift and consequently performance loss or data analysis bias, thus reducing the compressor's aerodynamic performance. Specifically, reading drift causes inaccurate stator blade angle information received by the compressor control system, preventing the system from precisely adjusting the blade angle. This can result in a decrease in the compressor's pressure ratio and efficiency, ultimately leading to engine performance losses such as insufficient thrust and increased fuel consumption.

[0023] Inaccurate angle readings can lead to biased data analysis during compressor performance analysis and fault diagnosis. Maintenance personnel may make incorrect judgments based on erroneous data, failing to promptly identify potential problems or accurately assess their severity. This can impact engine maintenance and upkeep plans, and even potentially cause safety hazards.

[0024] Reference will now be made in detail to embodiments of the present invention, one or more examples of which are illustrated in the accompanying drawings. Each example is provided to explain the present invention and not to limit it. In fact, it will be apparent to those skilled in the art that various modifications and variations may be made to the present invention without departing from the scope or spirit thereof. For example, features shown or described as part of one embodiment may be used with another embodiment to produce yet another embodiment. Therefore, the present invention is intended to cover these modifications and variations that fall within the scope of the appended claims and their equivalents.

[0025] As used herein, the term "axial" refers to the central axis of a component of an aircraft engine or the direction parallel to the central axis of that component, and the term "circumferential" refers to the direction about the "axial". The terms "first" and "second" may be used interchangeably to distinguish one component from another and are not intended to indicate the location or importance of individual components.

[0026] The term "variable stator vanes" refers to stator vanes whose installation angle can be changed around a fixed axis.

[0027] The term "compressor" refers to a turbine machine that uses rotating machinery to do work on the air flowing through it, thereby increasing the air pressure and supplying a high-energy airflow to the combustion chamber.

[0028] Figures 2 to 4 The structure of one embodiment of the angle measuring device for the adjustable stator blade 2 of the compressor of this utility model is shown. For example... Figures 2 to 4 As shown, the compressor adjustable stator blade 2 rotation angle measuring device of this utility model includes a scale 7, an indicating structure 6, and a calibration structure. The scale 7 is disposed in the compressor casing 1. The indicating structure 6 is connected to the adjustable stator blade 2 and can rotate with the adjustable stator blade 2, thus allowing the positional change of the indicating structure 6 relative to the scale 7 to indicate the rotation angle of the adjustable stator blade 2. The calibration structure is fixed to the casing 1, and the scale 7 can move relative to the calibration structure so that the zero mark on the scale 7 coincides with the direction of the indicating structure 6. The zero mark is the starting point for the rotation angle measurement.

[0029] Combination Figures 1 to 4 The compressor drives the linkage ring 3 via the actuator cylinder to move the rocker arm 4, thereby rotating the adjustable stator blade 2. The rotation angle of the adjustable stator blade 2 is obtained by the rotation angle measuring device of the adjustable stator blade 2 of this invention.

[0030] The scale 7 of the compressor adjustable stator blade 2 rotation angle measuring device of this utility model can be operably moved relative to the calibration structure. The calibration of the scale 7 is achieved by pointing the indicator structure 6 to the zero mark of the scale 7, which makes the zeroing more accurate, eliminates the performance loss or data analysis deviation caused by reading drift, ensures the reliability of subsequent work, is conducive to controlling the blade rotation angle, can improve the compressor performance, and the calibration process is simple.

[0031] The dial 7 includes a scale indicator component 71 and a calibration component 72. The scale indicator component 71 is provided with multiple scale lines. The rotation angle of the adjustable stator blade 2 can be determined according to the scale line pointed to by the indicator structure 6.

[0032] In an embodiment, the scale indicating component 71 is arranged to extend in the circumferential direction of the shaft neck 5 of the adjustable stator blade 2. Figure 3 In the plan view shown, the scale indicating component 71 is in the shape of a fan ring, and scale lines are arranged on the top surface of the scale indicating component 71.

[0033] The graduation value and the range of the scale indicating component 71 can be determined according to the actual rotation angle of the adjustable stator blade 2, and the utility model is not limited.

[0034] As shown in the plan view shown, the scale indicating component 71 is in the shape of a fan ring, and scale lines are arranged on the top surface of the scale indicating component 71. Figure 4 As shown, the dial 7 is located below the indicating structure 6, so that the indicating function of the indicating structure 6 can be realized. The indicating structure 6 can be a pointer, and the end thereof does not exceed the scale indicating component 71, so that the current rotation angle can be clearly and directly displayed.

[0035] The connection mode of the indicating structure 6 and the adjustable stator blade 2 is the same as that of the rocker arm 4 and the adjustable stator blade 2. Specifically, the indicating structure 6 is provided with a mounting hole 61. The mounting hole 61 penetrates the shaft neck 5 of the adjustable stator blade 2, and the indicating structure 6 is sleeved on the shaft neck 5 of the adjustable stator blade 2 through the mounting hole 61, so that the indicating structure 67 can rotate synchronously with the adjustable stator blade 2.

[0036] In combination with Figure 2 and Figure 3 , in an embodiment, the calibration structure comprises a first calibration piece 8 and a second calibration piece 9. The first calibration piece 8 and the second calibration piece 9 are arranged in the circumferential direction of the shaft neck 5 of the adjustable stator blade 2. The first calibration piece 8 and the second calibration piece 9 can be pins.

[0037] The casing 1 is provided with a first calibration hole (not shown) and a second calibration hole (not shown). The first calibration piece 8 and the first calibration hole are in interference fit, and the second calibration piece 9 and the second calibration hole are in interference fit, that is, interference pins are inserted into the first calibration hole and the second calibration hole respectively, so that a large pressure is generated between the pins and the hole walls, thereby forming a strong friction force, which can effectively prevent the pins from loosening, shifting or rotating in the holes, so that the connection has high stability and reliability. As shown, Figure 3 the diameters of the first calibration hole and the second calibration hole are

[0038] The calibration component 72 has a circular arc side surface 721. The circular arc side surface 721 can be tightly attached to the first calibration piece 8 and the second calibration piece 9, and can slide in the circumferential direction under the guidance of the first calibration piece 8 and the second calibration piece 9.

[0039] Reference Figure 3, the center of the first calibration member 8 and the second calibration member 9 and the rotation center of the adjustable stator blade 2 form a circle with a radius Rp. In this way, the circular arc side surface 721 of the dial 7 is in circumferential sliding contact with the first calibration member 8 and the second calibration member 9, and the radius of the circular arc side surface of the dial 7 is Ro, wherein Rp = Ro + D / 2, and the center of the circumferential sliding is the rotation center of the adjustable stator blade 2, so that the dial 7, the indicating structure 6 and the rotation center axis of the adjustable stator blade 2 are coincident, and the measurement accuracy can be improved.

[0040] In an embodiment, the rotation angle measuring device further comprises a locking structure. The locking structure presses the calibration member 72 against the casing 1 to fix the dial 7. After the calibration of the dial 7 is completed, the locking structure can fix the position of the dial 7, prevent the dial 7 from moving randomly during the measurement, and further improve the measurement accuracy.

[0041] Further, the locking structure comprises locking bolts 10. The calibration member 72 of the dial 7 is provided with a first locking hole (not shown), and the casing 1 is provided with a second locking hole (not shown). The locking bolts 10 pass through the first locking hole and the second locking hole to fix the dial 7.

[0042] As shown in Figs. Figure 2 and Figure 3 , the locking bolts 10 are two. The two locking bolts 10 are connected to each other by a locking wire (not shown), and are locked to each other by the locking wire, forming a mutual restraint relationship, so that the two locking bolts 10 are mutually restrained to a certain extent, resist loosening together, and further limit the movement of the dial 7.

[0043] In combination with the above embodiment, when the indicating structure 6 points to the zero scale line of the dial 7, the two locking bolts 10 are tightened to lock the dial 7.

[0044] The rotation angle measuring device of the utility model through the cooperation of the first calibration member 8 and the second calibration member 9 makes the circular arc side surface 721 of the dial 7 be limited to only rotate around the rotation center of the adjustable stator blade 2, the dial 7 is fine-tuned along the rotation shaft of the adjustable stator blade 2 during calibration, and the calibration accuracy is improved.

[0045] The rotation angle measuring device has high rotation angle measurement accuracy, is favorable for controlling the blade rotation angle, thereby improving the performance of the compressor, can improve the calibration accuracy, is more accurate in zero setting, eliminates the performance loss or data analysis deviation caused by reading drift, has simple structure, high positioning accuracy, convenient installation and high measurement accuracy.

[0046] The utility model discloses although the above-mentioned preferable embodiment is disclosed, but it is not used to limit the utility model, and any person skilled in the art can make possible change and modification without departing from the spirit and scope of the utility model. Therefore, all the modification, equivalent change and modification of the above-mentioned embodiment according to the technical essence of the utility model without departing from the technical scheme of the utility model all fall into the protection scope defined by the utility model claim.

Claims

1. A device for measuring the angle of rotation of a variable stator blade of a compressor, characterized in that The angle measuring device comprises a dial, an indicating structure and a calibration structure. The dial is arranged on a compressor casing. The indicating structure is connected with the adjustable stator blade, and the indicating structure can rotate with the adjustable stator blade, so that the position change of the indicating structure relative to the dial indicates the rotation angle of the adjustable stator blade. The calibration structure is fixed on the casing, and the dial can move relative to the calibration structure, so that the zero line on the dial and the pointing direction of the indicating structure coincide.

2. The corner measurement device of claim 1, wherein, The calibration structure comprises a first calibration member and a second calibration member. The first calibration member and the second calibration member are arranged along the circumference of the shaft neck of the adjustable stator blade.

3. The corner measurement device of claim 2, wherein, The casing is provided with a first calibration hole and a second calibration hole. The first calibration member and the first calibration hole are in interference fit, and the second calibration member and the second calibration hole are in interference fit.

4. The corner measurement device of claim 3, wherein, The dial comprises a scale indicating part and a calibration part. The calibration part has a circular arc side surface. The circular arc side surface can contact the first calibration member and the second calibration member and slide along the circumference under the guidance of the first calibration member and the second calibration member.

5. The corner measurement device of claim 4, wherein, The scale indicating part is arranged along the circumference of the shaft neck of the adjustable stator blade.

6. The corner measurement device of claim 4, wherein, The angle measuring device further comprises a locking structure. The locking structure presses the calibration part against the casing to fix the dial.

7. The corner measurement device of claim 6, wherein, The locking structure comprises a locking bolt. The calibration part of the dial is provided with a first locking hole, and the casing is provided with a second locking hole. The locking bolt passes through the first locking hole and the second locking hole to fix the dial.

8. The corner measurement device of claim 7, wherein, There are two locking bolts. The two locking bolts are connected with each other by a locking wire.

9. The corner measurement device of any one of claims 1-8, wherein, The indicating structure is provided with a mounting hole. The mounting hole passes through the shaft neck of the adjustable stator blade, and the indicating structure is sleeved on the shaft neck of the adjustable stator blade through the mounting hole.

10. The corner measurement device of any one of claims 1-8, wherein, The indicating structure is located above the dial.

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