A compressor stator blade rotation angle measuring device

Abstract

The application provides a compressor adjustable stator blade angle measuring device for measuring the angle of an adjustable stator blade. The device comprises a foldable sector gauge and a baffle. The baffle is fixed on the compressor casing and rotates synchronously with the adjustable stator blade extending from the compressor casing. The foldable sector gauge comprises a plurality of stacked spokes, one end of which is rotatably connected. The outer edge of the first spoke is attached to the inner end surface of a linkage ring, and the outer edge of the last spoke is attached to the baffle. The adjacent two spokes are slidingly connected to open or fold the foldable sector gauge. The intersection line between the outer edge of the last spoke and the baffle is parallel to the axis of the rocker arm, and the change amount of the included angle between the inner end surface of the linkage ring and the baffle is equal to the angle of the adjustable stator blade. The device has the advantages of simple structure, convenient operation and strong visibility.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of compressor stator blade rotation angle measurement, and particularly relates to a compressor stator blade rotation angle measuring device. BACKGROUND

[0002] A compressor is a device that uses a rotating machine to do work on the air flowing through it to increase the pressure of the air, and is used to supply high-energy air flow to the combustion chamber. Among them, the variable stator vanes can change their installation angle around the fixed axis to optimize and control air flow. On the compressor, a plurality of rocker arms are usually provided, one end of each rocker arm being connected to a part of the stator vane extending from the compressor casing. In addition, a linkage ring is also provided, which is connected to the compressor casing and connected to the other end of each rocker arm. The actuator connected to the linkage ring drives the linkage ring to rotate, thereby realizing the coordinated swinging of each rocker arm. This coordinated swinging causes the angle of each stator vane to change at the same time, so that the adjustment of the compressor inlet flow can be realized.

[0003] To realize accurate control of the compressor inlet flow, the rotation angle of each stator vane must be known. The value of the rotation angle is usually obtained through an angle measuring device. For example, Chinese patent CN215865160U proposes a variable guide vane rotation angle measuring device, which can efficiently and accurately realize the rotation angle measurement of the variable stator vane through the cooperation of the positioning device, angle measuring device and auxiliary positioning device therein. However, the variable guide vane rotation angle measuring device has a complex structure, which may cause some problems as follows:

[0004] 1) It needs to occupy a larger space, making the integration process more complex in an environment with limited space.

[0005] 2) It leads to an increase in the total weight of the system, thereby causing additional energy consumption and rising operating costs.

[0006] 3) It leads to an increase in the complexity of the system, while increasing the risk of failure and the difficulty of maintenance.

[0007] To solve the above problems, engineers usually try to reduce the size and weight of the measuring device while ensuring the accuracy and efficiency of the angle measuring device. Chinese patent CN110439842A proposes a stator blade rotation angle measuring structure and a calibration method. The measuring structure includes a scale disc and a pointer line connected with the measuring rocker. The measuring rocker connected with the stator blade moves synchronously with the remaining rockers under the drive of the linkage ring. In this process, the scale disc moves with the measuring rocker, and the scale indicated by the pointer line changes. The rotation angle of the stator blade can be obtained conveniently and quickly through the scale indicated by the pointer line. Before using the measuring mechanism, the rotation range of the stator blade needs to be calibrated by the actuator piston rod. The extension length of the actuator piston rod has a one-to-one correspondence with the rotation angle of each stator blade. The rotation angle of each stator blade can be obtained by observing the extension length of the actuator piston rod. However, since the extension length of the actuator piston rod is not easy to observe, the scheme of calibrating the rotation angle of each stator blade by the actuator piston rod is inefficient and difficult to implement. SUMMARY

[0008] The purpose of the present application is to provide a simple structure and convenient operation of the compressor adjustable stator blade rotation angle measuring device, which can indirectly and quickly obtain the rotation angle of the adjustable stator blade through the included angle between the linkage ring and the rocker.

[0009] To achieve the above purpose, the present application provides a compressor adjustable stator blade rotation angle measuring device for measuring the rotation angle of the adjustable stator blade, comprising:

[0010] The baffle is fixed on the compressor casing, and the baffle rotates synchronously with the adjustable stator blade extending out of the compressor casing;

[0011] The foldable fan-shaped measuring device comprises a plurality of stacked spokes, one end of the plurality of stacked spokes is rotatably connected, the outer edge of the first spoke is attached to the inner side end surface of the linkage ring, the outer edge of the last spoke is attached to the baffle, and the adjacent two spokes are slidingly connected to open or fold the foldable fan-shaped measuring device;

[0012] The intersection line between the outer edge of the last spoke and the baffle is parallel to the axis of the rocker, and the change amount of the included angle between the inner side end surface of the linkage ring and the baffle is equal to the rotation angle of the adjustable stator blade.

[0013] In one embodiment, the foldable fan-shaped measuring device, with the one end of the plurality of stacked spokes rotatably connected as the rotation center, the rotation axis of the plurality of stacked spokes is a straight line passing through the rotation center and perpendicular to the foldable fan-shaped measuring device, and the last spoke attached to the baffle drives the foldable fan-shaped measuring device to open or fold around the rotation axis;

[0014] The position of the rotating shaft is fixed.

[0015] In one embodiment, the minimum distance between the baffle and the linkage ring is greater than 0.

[0016] In one embodiment, the baffle is L-shaped, and the baffle comprises:

[0017] The first end plate is parallel to the top of the compressor casing, and the adjustable stator blade extends through the first end plate.

[0018] The second end plate is arranged outside the compressor casing, and one side of the second end plate is connected to one side of the first end plate, and the outer edge of the last spoke is attached to the outer end surface of the second end plate.

[0019] The intersection line of the outer edge of the last spoke and the outer end surface of the second end plate is parallel to the axis of the rocker arm.

[0020] In one embodiment, the first end plate and the second end plate are perpendicular to each other.

[0021] In one embodiment, one end of the plurality of stacked spokes is rotationally connected by a connecting piece, and each spoke rotates around the connecting piece relative to the adjacent spoke.

[0022] In one embodiment, the connecting piece is a hinge.

[0023] In one embodiment, a connector is arranged on the contact surface of each adjacent spoke, and the two adjacent spokes are connected by two matching connectors.

[0024] In one embodiment, a limiting mechanism is arranged on the connector to limit the maximum angle of each spoke relative to the adjacent spoke.

[0025] In one embodiment, the maximum angle of sliding is not greater than the maximum angle that each spoke can measure.

[0026] In one embodiment, each of the plurality of stacked spokes is marked with an angular scale.

[0027] In one embodiment, each spoke is sprayed with a different color.

[0028] The adjustable stator blade angle measuring device for a compressor has the advantages of simple structure, easy operation and strong visibility. The device can quickly measure the rotation angle of the adjustable stator blade, which is convenient for observation and helps to control the blade angle, thereby improving the performance of the compressor. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1A schematic view of the position of the adjustable stator blade in the compressor;

[0030] Figure 2 A schematic view of the structure of the adjustable stator blade rotation angle measuring device of the compressor according to an embodiment of the present application;

[0031] Figure 3 A top view of the adjustable stator blade rotation angle measuring device of the compressor according to an embodiment of the present application, with the adjustable stator blade at a first angle;

[0032] Figure 4 A top view of the adjustable stator blade rotation angle measuring device of the compressor according to an embodiment of the present application, with the adjustable stator blade at a second angle.

[0033] Reference numerals

[0034] 1, compressor casing; 2, adjustable stator blade; 3, linkage ring; 4, rocker arm; 5, foldable sector gauge; 6, blocking piece; L1, axis of the rocker arm; L2, intersection line of the outer edge of the last spoke and the outer end surface of the second end plate. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0036] As shown in Figure 1 , the compressor drives the linkage ring to rotate through the actuator cylinder, synchronously drives the rocker arm to swing, and realizes the rotation of the adjustable stator blade 2. The compressor is usually provided with multiple rocker arms and multiple adjustable stator blades. The linkage ring 3 is sleeved on the compressor casing 1, each adjustable stator blade 2 is connected with the compressor casing 1, one end of each rocker arm 4 corresponds to the part of the adjustable stator blade 2 extending out of the compressor casing 1, the other end of each rocker arm 4 is connected with the linkage ring 3, see Figure 2 . The linkage ring 3 drives the rocker arm 4 to realize the rotation of the adjustable stator blade 2, see Figures 3-4 .

[0037] The present application provides a compressor stator blade rotation angle measuring device for measuring the rotation angle of the adjustable stator blade. As shown in Figure 2As shown, the adjustable stator blade angle measuring device of the compressor in an embodiment of the present application comprises a foldable sector 5 and a baffle 6, the baffle 6 is fixed on the compressor casing 1, and the baffle 6 rotates synchronously with the adjustable stator blade 2 extending out of the compressor casing. The foldable sector 5 comprises a plurality of stacked spokes, one end of the plurality of stacked spokes is rotatably connected, the outer edge of the first spoke is attached to the inner end surface of the linkage ring 3, the outer edge of the last spoke is attached to the baffle 6, and the adjacent two spokes are slidingly connected to open or fold the foldable sector 5, see Figure 2 . Wherein, the intersection line L2 between the outer edge of the last spoke and the baffle 6 is parallel to the axis L1 of the rocker arm, and the change amount of the included angle between the inner end surface of the linkage ring 3 and the baffle 6 is equal to the rotation angle of the adjustable stator blade 2, so as to indirectly measure the rotation angle of the adjustable stator blade by folding the foldable sector 5. It should be understood that when the baffle 6 rotates synchronously with the adjustable stator blade 2, the spoke attached to the baffle 6 drives the foldable sector 5 to open or fold. It should also be understood that the first spoke can be the uppermost one of the plurality of stacked spokes, and the last spoke is the lowermost one at this time; or the first spoke can be the lowermost one of the plurality of stacked spokes, and the last spoke is the uppermost one at this time.

[0038] In this embodiment, in the foldable sector 5, the rotation center is the rotatably connected position of one end of the plurality of stacked spokes, the rotation axis is a straight line passing through the rotation center and perpendicular to the foldable sector 5, the spoke attached to the baffle 6 drives the foldable sector 5 to open or fold around the rotation axis, and the position of the rotation axis is fixed. In this embodiment, the position of the rotation axis is fixed by attaching the outer edge of the first spoke to the inner end surface of the linkage ring 3, so as to ensure the accuracy and stability of the angle measurement.

[0039] Further, the minimum distance between the baffle 6 and the linkage ring 3 is greater than 0, so as to ensure that the existence of the baffle 6 does not affect the normal rotation of the rocker arm.

[0040] Further, the baffle 6 is L-shaped, and the baffle 6 comprises a first end plate and a second end plate. The first end plate is parallel to the top of the compressor casing 1, and the end of the adjustable stator blade 2 extending out of the compressor casing 1 passes through the first end plate. The second end plate is arranged outside the compressor casing 1, one side of the second end plate is connected to one side of the first end plate, and the outer edge of the last spoke is attached to the outer end surface of the second end plate. Wherein, the intersection line L2 between the outer edge of the last spoke and the outer end surface of the second end plate is parallel to the axis L1 of the rocker arm, see Figure 2 .

[0041] Further, the first end plate and the second end plate are perpendicular to each other, so as to ensure that the second end plate does not affect the normal use of the compressor casing 1, see Figure 2 .

[0042] Further, the ends of the plurality of stacked spokes are rotationally connected by a connector to form a unitary body, each spoke being rotatable about the connector relative to an adjacent spoke. Preferably, the connector is a hinge.

[0043] Further, each of the contact surfaces of adjacent spokes is provided with a connector, and the adjacent spokes are slidably connected by the two mating connectors. These connectors are components used to connect and support the spokes, ensuring that they can rotate relative to each other and not separate. The adjacent spokes are slidably connected by the two mating connectors. These connectors typically have convex and concave or other mating shapes to ensure that they can be securely connected between adjacent spokes while still allowing relative sliding.

[0044] Still further, the connectors are provided with a limiting mechanism that limits the maximum angle at which each spoke can slide relative to an adjacent spoke. It should be understood that the limiting mechanism can be a mechanical stop: adding physical stops or obstacles to the rotation path of the spokes to limit their rotation angle. These mechanical stops can be fixed blocks, pins or other fixed structures that prevent the spokes from continuing to rotate beyond the desired angle. The limiting mechanism can be a limit pin or pin shaft: a limit pin or pin shaft is installed on the rotation shaft of the spoke, and these pins can be used in combination with fixed holes or grooves, thereby limiting the rotation range of the spoke. When the spoke rotates to a certain position, the pin will enter the hole or groove, thereby preventing further rotation. The limiting mechanism can be a special mechanical angle limiting device: such as a limit pin, cam, cam track or other angle limiting device, which can accurately control and limit the rotation angle of the spoke. The limiting mechanism can be a spring or friction: adding a spring or friction device to the rotation shaft of the spoke to exert a reverse force on the spoke to prevent it from rotating to an angle that is not allowed. This method can provide a certain flexibility, so that after reaching the limit position, the spoke can be slightly bent or bent to avoid damage. In addition, the limiting mechanism can also be a limit switch: a limit switch or sensor is installed on the rotation path of the spoke to detect the position of the spoke and trigger an alarm or stop the mechanical movement when a certain angle is reached. Preferably, the limiting mechanism limits the maximum angle at which each spoke can slide relative to an adjacent spoke to be no greater than the maximum angle that each spoke can measure.

[0045] Further, the foldable fan-shaped measuring device 5 is marked with an angular scale, and the rotation angle of the adjustable stator blade 2 can be directly read. The angular scale on the foldable fan-shaped measuring device is usually realized by a scale ruler, a scale disc or a vernier. For example, a semicircular scale ruler is marked on the surface of the foldable fan-shaped measuring device. Alternatively, a scale disc of a part of the foldable fan-shaped measuring device is fixed at the center of the measuring device. The scale disc is also marked with scale lines or numbers for corresponding with the scale ruler of the foldable fan-shaped measuring device. By rotating the scale disc, the required angle can be aligned. Alternatively, a vernier is arranged on the foldable fan-shaped measuring device for reading and indicating the required angle.

[0046] Further, different colors are sprayed on each spoke for convenient observation.

[0047] The adjustable stator blade rotation angle measuring device of the compressor has the following beneficial effects:

[0048] The device has simple structure, convenient operation and strong visibility. The rotation angle of the adjustable stator blade can be quickly measured by using the device, which is convenient for observation and beneficial for controlling the blade rotation angle, thereby improving the performance of the compressor.

[0049] The embodiments in the description are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the embodiments can be referred to each other.

[0050] It should be noted that, in the description of the present application, the terms indicating the direction or position relationship such as "upper", "lower", "left", "right", "inner", "outer" and the like are based on the direction or position relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0051] It should also be noted that, in the description of the present application, unless otherwise explicitly specified and limited, the terms "set", "connected", "connected" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] The above embodiments are only further illustrations of the present application, and are not intended to limit the present application in other forms. The present application can have other various embodiments. Those skilled in the art can make various corresponding modifications and changes according to the present application without departing from the spirit and essence of the present application, and these corresponding modifications and changes should fall within the protection scope of the present application.

Claims

1. A compressor adjustable stator blade angle measuring device for measuring the angle of adjustable stator blades, characterized in that, The application relates to a folding sector protractor, which comprises a plurality of stacked spokes, one end of the spokes being rotatably connected, the outer edge of a first spoke being attached to the inner end surface of a linkage ring, the outer edge of the last spoke being attached to a baffle, the two adjacent spokes being slidably connected to open or fold the folding sector protractor, a connector being arranged on the contact surface of the two adjacent spokes, the two adjacent spokes being slidably connected through the two matched connectors, a limiting mechanism being arranged on the connector, and the limiting mechanism limiting the maximum angle of each spoke relative to the adjacent spoke. The folding sector protractor takes the rotatable connection of the one end of the plurality of stacked spokes as the rotation center, the rotation axis of the plurality of stacked spokes is a straight line passing through the rotation center and being perpendicular to the folding sector protractor, the last spoke attached to the baffle drives the folding sector protractor to open or fold around the rotation axis, the position of the rotation axis is fixed, and the position of the rotation axis is fixed through the attachment of the outer edge of the first spoke to the inner end surface of the linkage ring. The intersection line of the outer edge of the last spoke and the baffle is parallel to the axis of the rocker arm, and the angle change amount between the inner end surface of the linkage ring and the baffle is equal to the rotation angle of the adjustable stator blade. The first end plate and the second end plate are perpendicular to each other. The one end of the plurality of stacked spokes is rotatably connected through a connecting piece, and each spoke rotates around the connecting piece relative to the adjacent spoke. The connecting piece is a hinge.

2. The compressor adjustable stator blade angle measurement device of claim 1, wherein, The maximum sliding angle is not greater than the maximum angle that can be measured by each spoke.

3. The compressor adjustable stator blade angle measurement device of claim 1, wherein, The plurality of stacked spokes are marked with an angular scale.

4. The compressor variable stator vane angle measurement device of claim 3, wherein, Each spoke is sprayed with different colors.

5. The compressor adjustable stator blade angle measurement device of claim 1, wherein, ​ 6. The compressor adjustable stator blade angle measurement device of claim 1, wherein, ​ 7. The compressor adjustable stator blade angle measurement device of claim 1, wherein, ​

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