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 and an indicating structure, wherein the dial is fixedly arranged on the 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 indicating structure has an indicating effect of indicating the rotating angle of the adjustable stator blade relative to the position change of the dial. The rotation angle measuring device can conveniently realize the measurement of the rotation angle of the adjustable stator blade.

Description

TECHNICAL FIELD

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

[0002] A plurality of rocker arms are usually provided on the compressor of an aeroengine, one end of each rocker arm is connected to a part of a stator blade extending out of the compressor casing, and a linkage ring connected to the compressor casing is provided. The linkage ring is connected to the other end of each rocker arm, and an actuator connected to the linkage ring drives the linkage ring to rotate, synchronously driving each rocker arm to swing, thereby synchronously changing the angle of each stator blade to regulate the inlet flow of the compressor. To accurately control the inlet flow of the compressor, the angle of rotation of each stator blade needs to be accurately known. Currently, the value of the angle of rotation is obtained by an angular displacement measuring device.

[0003] However, on the one hand, the measurement steps of the conventional angular displacement measuring device are complicated. In actual operation, the measuring device needs to be accurately installed and adjusted to ensure that it can accurately sense the rotation of the stator blade. Moreover, multiple measurements and data calibration may be required during the measurement process to ensure the reliability of the measurement results, increasing the time cost and labor cost of operation. On the other hand, due to the extremely compact space inside the aeroengine, there are many complex components and pipelines and other structures, and the space limitation problem is prominent. Installing and arranging the angular displacement measuring device in such a limited space is easily disturbed by the surrounding environment, affecting the accurate acquisition of the angle of rotation of the stator blade, and further affecting the accurate control of the inlet flow of the compressor, reducing the performance and reliability of the engine. SUMMARY

[0004] The utility model aims at providing a kind of angle measuring device of adjustable stator blade of compressor, can conveniently realize the measurement of adjustable stator blade rotation angle.

[0005] One aspect of the utility model provides an angle measuring device of adjustable stator blade of compressor, comprising a dial and an indicating structure;Wherein, the dial is fixedly arranged in the 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 has the indicating effect of indicating the rotation angle of the adjustable stator blade.

[0006] In an embodiment, the dial comprises a mounting component and a scale indicating component;The mounting component is connected with the compressor casing;The scale indicating component is connected with the mounting component, and the scale indicating component is provided with a plurality of scale lines.

[0007] In an embodiment, the mounting component comprises a mounting hole; the mounting hole passes through the journal of the adjustable stator blade, and the dial is sleeved on the journal of the adjustable stator blade through the mounting hole.

[0008] In an embodiment, the mounting component further comprises a fixing hole, and the angle measuring device further comprises a fastener; the fastener passes through the fixing hole and is in contact with the casing to press the dial against the casing.

[0009] In an embodiment, the mounting component further comprises a fixing groove, and the fixing groove is in communication with the fixing hole; the casing is accommodated in the fixing groove, and the fastener passes through the fixing hole and is in contact with the casing in the fixing groove.

[0010] In an embodiment, the scale indicating component is arranged in extension around the journal of the adjustable stator blade.

[0011] In an embodiment, a zero scale line on the scale indicating component is axially coincident with the casing.

[0012] In an embodiment, the dial is located below the indicating structure.

[0013] In an embodiment, the angle measuring device further comprises a calibration member; when the calibration member is connected with the dial and a rocker arm connected with the adjustable stator blade, a zero scale line on the scale indicating component of the dial is axially coincident with the casing.

[0014] In an embodiment, the rocker arm is provided with a first calibration hole, and the dial is provided with a second calibration hole; the calibration member passes through the first calibration hole and the second calibration hole to connect the dial and the rocker arm.

[0015] The dial and the indicating structure of the angle measuring device of the adjustable stator blade of the compressor are matched with each other, the pointing of the indicating structure on the dial can directly show the current rotation angle of the adjustable stator blade, the indicating structure can synchronously rotate with the adjustable stator blade, the dial is fixed on the casing, the stability of the dial is better, the overall structure is simple, the occupied space is smaller, and the measurement of the rotation angle of the adjustable stator blade is more conveniently realized, the measurement error is reduced, and the measurement accuracy is improved. 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 sectional view of a compressor structure;

[0018] Figure 2 This is a schematic diagram of an embodiment of the compressor adjustable stator blade rotation measuring device according to the present invention;

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

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

[0021] Figure 5 A schematic diagram of another embodiment of the compressor adjustable stator blade rotation measuring device of this utility model;

[0022] Figure 6 yes Figure 5 Top view of the angle measuring device shown;

[0023] Figure 7 yes Figure 5 A cross-sectional view of the angle measuring device shown. Detailed Implementation

[0024] 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.

[0025] However, on the one hand, the measurement procedures of traditional angular displacement measuring devices are cumbersome and complex. In actual operation, the measuring device needs to be precisely installed and debugged to ensure that it can accurately sense the rotation of the stator blades. Moreover, multiple measurements and data calibrations may be required during the measurement process to ensure the reliability of the measurement results, increasing the time and labor costs of operation. On the other hand, due to the extremely compact internal space of aero engines, with many complex components and pipelines, space constraints are prominent. Installing and arranging angular displacement measuring devices in such a limited space is easily affected by the surrounding environment, affecting the accurate acquisition of the stator blade rotation angle, and consequently affecting the precise control of the compressor inlet flow, reducing engine performance and reliability.

[0026] 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.

[0027] 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.

[0028] The term "variable stator vanes" refers to stator vanes whose installation angle can be changed around a fixed axis.

[0029] 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.

[0030] Figures 2 to 4 The diagram illustrates the structure of one embodiment of the compressor adjustable stator blade angle measuring device of this invention. The compressor adjustable stator blade angle measuring device includes a scale 8 and an indicating structure 7. The scale 8 is fixedly mounted on the compressor housing 1. The indicating structure 7 is connected to the adjustable stator blade 2, and the indicating structure 7 can rotate with the adjustable stator blade 2, thereby enabling the positional change of the indicating structure 7 relative to the scale 8 to indicate the angle of rotation of the adjustable stator blade 2.

[0031] 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.

[0032] The scale 8 and the indicator structure 7 of the compressor adjustable stator blade 2 rotation angle measuring device of this utility model cooperate with each other. The pointer of the indicator structure 7 on the scale 8 can intuitively display the current rotation angle of the adjustable stator blade 2. The indicator structure 7 can rotate synchronously with the adjustable stator blade 2. The scale 8 is fixed to the housing 1, which makes the scale 8 more stable. The overall structure is simple and occupies less space. It can more easily realize the measurement of any rotation angle of the adjustable stator blade 2, reduce measurement error and improve measurement accuracy.

[0033] Combination Figures 2 to 4 The dial 8 includes a mounting component 81 and a scale indicator component 82. The mounting component 81 is connected to the compressor casing 1. The scale indicator component 82 is connected to the mounting component 81 and has 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 7.

[0034] In one embodiment, the scale indicator 82 extends circumferentially on the journal of the adjustable stator blade 2. Figure 3 In the top view shown, the scale indicator 82 is fan-shaped, and scale lines are provided on the top surface of the scale indicator 82.

[0035] The graduation value and range of the scale indicator component 82 can be determined according to the actual rotation angle of the adjustable stator blade 2, and this utility model does not impose any limitations.

[0036] like Figure 4 As shown, the dial 8 is located below the indicating structure 7, thus enabling the indicating function of the indicating structure 7. The indicating structure 7 can be a pointer, the end of which does not extend beyond the scale indicating component 82, so as to clearly and intuitively display the current angle.

[0037] The connection method between the indicator structure 7 and the adjustable stator blade 2 is the same as the connection method between the rocker arm 4 and the adjustable stator blade 2, that is, it is sleeved on the journal of the adjustable stator blade 2 through the opening, so that the indicator structure 7 can rotate synchronously with the adjustable stator blade 2.

[0038] refer to Figure 4 The mounting component 81 of the dial 8 includes a mounting hole 811. The mounting hole 811 passes through the journal of the adjustable stator blade 2, and the dial 8 is fitted onto the journal of the adjustable stator blade 2 through the mounting hole 811. The mounting hole 811 and the journal of the adjustable stator blade 2 are coaxially arranged.

[0039] Furthermore, the mounting component 81 also includes a fixing hole 812, and the angle measuring device also includes a fastener 9, which passes through the fixing hole 812 and contacts the housing 1 to press the dial 8 against the housing 1, thereby achieving the fixation of the dial 8 and the housing 1.

[0040] Continue to refer toFigure 4 The mounting member 81 further comprises a fixing groove 813. The fixing groove 813 and the fixing hole 812 are in communication. The casing 1 is accommodated in the fixing groove 813, and the fastener 9 passes through the fixing hole 812 and then contacts the casing 1 located in the fixing groove 813.

[0041] The fastener 9 can be a screw. By tightening the screw, the position of the dial 8 relative to the casing 1 can be locked.

[0042] The mounting hole 811 of the dial 8, the opening of the indicating structure 7, the adjustable stator blade 2 and the casing 1 hole are coaxial, the rotation shafts coincide, and the measurement accuracy is high.

[0043] As shown in Figs. Figure 2 and Figure 3 , the zero scale line is provided on the scale indicating member 82 of the dial 8 as the starting point of the angle measurement.

[0044] Since there can be errors in the measurement of the angle of the adjustable stator blade 2, the dial 8 needs to be calibrated to ensure the reliability of subsequent work. As shown in Fig. Figures 5 to 7 , in an embodiment, the angle measurement device further comprises a calibration member 5. When the calibration member 5 is connected to the dial 8 and the rocker arm 4 connected to the adjustable stator blade 2, the zero scale line on the scale indicating member 82 of the dial 8 is coaxial with the axial direction of the casing 1. When the zero scale line is coaxial with the axial direction of the casing 1, it means that the calibration of the dial 8 is completed.

[0045] Specifically, the rocker arm 4 is provided with a first calibration hole 41, and the dial 8 is provided with a second calibration hole 83. The calibration member 5 can be a pin. The first calibration hole 41 of the rocker arm 4 can be a waist-shaped hole, and the second calibration hole 83 of the dial 8 can be a circular hole. The circular hole can constrain the degree of freedom of rotation of the dial 8.

[0046] During calibration, the calibration member 5 passes through the first calibration hole 41 and the second calibration hole 83 to connect the dial 8 and the rocker arm 4. After the initial position of the dial 8 is determined, the fastener 9 is tightened to lock the dial 8, and the calibration member 5 is disassembled, which completes the calibration of the zero position of the dial 8. In this way, the calibration accuracy can be improved.

[0047] The angle measurement device of the utility model through the cooperation of the first calibration hole 41 and the second calibration hole 83, constrain the rotation freedom, namely utilize two-point positioning straight line, the calibration accuracy is high and does not excessively constrain, convenient to install, can improve the calibration accuracy, zero more accurately, reduce the performance loss or data analysis deviation caused by reading drift, positioning accuracy is high, convenient to install and the accuracy of measurement is high, be favorable to control blade angle of rotation, thereby improve the performance of compressor.

[0048] 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 scale disc and the indicating structure are included; wherein, The scale disc is fixedly arranged in the 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 scale disc has an indicating effect of indicating the rotation angle of the adjustable stator blade.

2. The corner measurement device of claim 1, wherein, The scale disc includes a mounting component and a scale indicating component; The mounting component is connected with the compressor casing; The scale indicating component is connected with the mounting component, and the scale indicating component is provided with a plurality of scale lines.

3. The corner measurement device of claim 2, wherein, The mounting component includes a mounting hole; The mounting hole penetrates the journal of the adjustable stator blade, and the scale disc is sleeved on the journal of the adjustable stator blade through the mounting hole.

4. The corner measurement device of claim 3, wherein, The mounting component further includes a fixing hole, and the rotation angle measuring device further includes a fastener, the fastener penetrates the fixing hole and then contacts the casing, so as to press the scale disc to the casing.

5. The corner measurement device of claim 4, wherein, The mounting component further includes a fixing groove, and the fixing groove is communicated with the fixing hole; The casing is accommodated in the fixing groove, and the fastener penetrates the fixing hole and then contacts the casing in the fixing groove.

6. The corner measurement device of claim 2, wherein, The scale indicating component is arranged in extension around the journal of the adjustable stator blade.

7. The corner measurement device of claim 2, wherein, The zero scale line on the scale indicating component is axially coincident with the casing.

8. The corner measurement device of claim 2, wherein, The scale disc is located below the indicating structure.

9. The corner measurement device of any one of claims 2-8, wherein, The rotation angle measuring device further includes a calibration member; When the calibration member is connected with the scale disc and a rocker arm connected with the adjustable stator blade, the zero scale line on the scale indicating component of the scale disc is axially coincident with the casing.

10. The corner measurement device of claim 9, wherein, The rocker arm is provided with a first calibration hole, and the scale disc is provided with a second calibration hole; The calibration member penetrates the first calibration hole and the second calibration hole to connect the scale disc and the rocker arm.

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