Aligning device, blade tip clearance calibration device and aligning method

Abstract

The invention relates to the technical field of aero-engines, and discloses an aligning device, a blade tip clearance calibration device and an aligning method.The aligning device is suitable for adjusting the relative position of a rotating center shaft of the blade tip clearance calibration device and a cartridge receiver, and the aligning device comprises a mounting shaft, a blade tip clearance calibration device and a blade tip clearance calibration device, the axial center line of the mounting shaft coincides with the axial center line of the rotating center shaft; the first distance measuring unit is arranged on the mounting shaft and is suitable for acquiring first distance information between the mounting shaft and the inner wall of the cartridge receiver; and the rotation angle detection unit is arranged on the mounting shaft and is suitable for acquiring rotation angle information of the mounting shaft. The obtained first distance information and rotation angle information are sent to the first controller, the first controller is used for calculating the eccentricity of the rotation center shaft relative to the cartridge receiver in the two directions, an operator correspondingly moves the cartridge receiver according to the obtained eccentricity, the aligning operation time is short, and the aligning operation efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of aero-engines, and in particular to a centering device, a blade tip clearance calibration device and a centering method. Background Art

[0002] The real impeller dynamic calibration in the tip clearance calibration method is to install the real impeller and casing on the calibration device, make the impeller and casing concentric, rotate the impeller, change the gap between the impeller and casing and record the corresponding output voltage of the capacitance measurement module to complete the gap calibration.

[0003] Before calibration, the rotating center axis needs to be aligned to ensure that the impeller center, the casing center, and the rotating center axis of the calibration device are concentric after the impeller is subsequently installed on the rotating center axis. Currently, alignment before calibration mainly uses a manual meter to determine whether the rotating center axis and the casing are concentric. The existing meter-based offset calculation method can only adjust the offset in one direction at a time. After completing one alignment, multiple meter adjustments are required. The alignment operation is time-consuming and inefficient. Summary of the Invention

[0004] In view of this, the present invention provides a centering device, a blade tip clearance calibration device and a centering method to solve the problem that the existing method of manually calculating the offset by using a meter can only adjust the offset in one direction at a time, multiple meter adjustments are required after completing one centering operation, and the centering operation takes a long time and is inefficient.

[0005] In a first aspect, the present invention provides a centering device suitable for adjusting the relative position of the rotation center axis of a tip clearance calibration device and a casing, the centering device comprising:

[0006] A mounting shaft is provided on the rotation center shaft, wherein the axial center line of the mounting shaft coincides with the axial center line of the rotation center shaft;

[0007] a first distance measuring unit, disposed on the mounting shaft and adapted to obtain first distance information between the mounting shaft and the inner wall of the casing;

[0008] a rotation angle detection unit, provided on the installation shaft and adapted to obtain rotation angle information of the installation shaft;

[0009] The first controller is communicatively connected to the first distance measuring unit and the rotation angle detection unit, and is adapted to calculate the eccentricity information of the rotation center axis according to the acquired first distance information and the rotation angle information.

[0010] Beneficial effect: The first distance measuring unit and the rotation angle detection unit are set on the rotating center axis through the installation shaft. The first distance measuring unit and the rotation angle detection unit rotate with the rotating center axis, and obtain the first distance information between the installation shaft and the inner wall of the casing, as well as the rotation angle information of the installation shaft in real time. By sending the first distance information and the rotation angle information to the first controller, the eccentricity of the rotating center axis relative to the casing in two directions is calculated by the first controller. The operator moves the casing accordingly according to the obtained eccentricity, and the centering operation of the rotating center axis can be completed at one time. The centering operation time is short and the centering operation efficiency is high.

[0011] Optionally, a driving mechanism is further included, which is in transmission connection with the casing and in communication connection with the first controller, and the driving mechanism is suitable for obtaining the eccentricity information to drive the casing to move relative to the mounting axis.

[0012] Beneficial Effects: By providing a transmission connection between the drive mechanism and the casing, the axial centerline of the mounting shaft coincides with the axial centerline of the rotational axis, enabling the drive mechanism to drive the casing relative to the rotational axis. The drive mechanism obtains eccentricity information calculated by the first controller and drives the casing to a preset position based on the eccentricity information. This eliminates the need for an operator to manually adjust the casing position to complete centering, making the casing position adjustment process simple and convenient, and improving the accuracy of casing position adjustment.

[0013] Optionally, the driving mechanism includes:

[0014] a first driving member connected to the casing and adapted to drive the casing to move in a first direction;

[0015] a second driving member connected to the casing and adapted to drive the casing to move in a second direction;

[0016] Wherein, the first direction is perpendicular to the second direction.

[0017] Beneficial effect: The first driving member and the second driving member can drive the casing to move in different directions, so that the casing can be adjusted in position not only in the X direction but also in the Y direction, making the casing position adjustment operation quick and accurate.

[0018] Optionally, the first controller includes:

[0019] an information receiving module, adapted to receive the first distance information and the rotation angle information;

[0020] a calculation module, adapted to calculate eccentricity information of the installation shaft according to the first distance information and the rotation angle information;

[0021] The information sending module is adapted to send the eccentricity information of the mounting shaft to the driving mechanism.

[0022] Beneficial effects: By utilizing the information receiving module, the calculation module and the information sending module, the first distance information and the rotation angle information can be received and subsequently calculated, and the calculation results can be sent to the driving mechanism, so that the driving mechanism can drive the movement of the casing and improve the efficiency of the casing position adjustment.

[0023] Optionally, it also includes:

[0024] a second distance measuring unit, disposed on the mounting shaft, wherein the first distance measuring unit and the second distance measuring unit are spaced apart along the axial direction of the mounting shaft, and the second distance measuring unit is adapted to obtain second distance information between the mounting shaft and the inner wall of the casing;

[0025] A second controller is connected to the first distance measuring unit, the rotation angle detection unit and the second distance measuring unit for communication, and the second controller is adapted to calculate the offset angle information of the installation axis (3) based on the acquired first distance information, the rotation angle information and the second distance information.

[0026] Beneficial effect: The second distance measuring unit and the first distance measuring unit are arranged at different heights of the mounting shaft. When measuring the eccentricity of the mounting shaft, the first distance measuring unit, the rotation angle detection unit and the second distance measuring unit cooperate to send the obtained relevant information to the second controller for calculation, and the offset angle information of the mounting shaft can also be obtained, thereby facilitating the operator to adjust the offset angle of the mounting shaft, so as to further improve the accuracy of the relative position of the rotation center axis and the casing.

[0027] Optionally, it further comprises a connecting arm adapted to extend in a direction perpendicular to the axial direction of the installation shaft;

[0028] Wherein, the connecting arm is suitable for connecting the first distance measuring unit and the mounting shaft;

[0029] And / or, the connecting arm is suitable for connecting the second distance measuring unit and the mounting shaft.

[0030] Beneficial Effects: A connecting arm is provided in the axial direction of the mounting shaft, and the first ranging unit and / or the second ranging unit are disposed on the connecting arm. This facilitates connection and removal of the first ranging unit and / or the second ranging unit from the mounting shaft. Furthermore, the connecting arm allows the distance between the first ranging unit and / or the second ranging unit and the inner wall of the casing to be varied, thereby meeting various testing requirements.

[0031] Optionally, the first distance measuring unit is a first displacement sensor;

[0032] And / or, the second distance measuring unit is a second displacement sensor;

[0033] And / or, the rotation angle detection unit is a rotary encoder.

[0034] Beneficial effects: The first distance measuring unit and the second distance measuring unit use displacement sensors to detect the distance between them and the casing. The displacement sensors are simple to use and highly accurate. The rotation angle detection unit uses a rotary encoder. The connection between the rotary encoder and the mounting shaft is simple and highly accurate, thereby improving the accuracy of the centering and leveling operations.

[0035] In a second aspect, the present invention provides a blade tip clearance calibration device, comprising: the centering device described in any one of the above items.

[0036] Optionally, it also includes:

[0037] A base is arranged below the rotation center axis;

[0038] The leveling part is arranged on the base, the rotation center axis passes through the leveling part and rotates with the leveling part. The leveling part is suitable for moving relative to the base to adjust the offset angle of the rotation center axis relative to the casing.

[0039] Beneficial effects: The leveling part is arranged on the base, and the rotating center axis is arranged in the leveling part. By changing the relative position of the leveling part and the base, the leveling part drives the rotating center axis to move synchronously, thereby adjusting the offset angle of the rotating center axis relative to the casing, thereby realizing the leveling operation of the rotating center axis.

[0040] In a third aspect, the present invention provides a centering method, which is applied to any of the centering devices described above, or to any of the blade tip clearance calibration devices described above, comprising:

[0041] Starting the rotation center axis, the first distance measuring unit, the rotation angle detection unit and the first controller, and sending the first distance information obtained by the first distance measuring unit and the rotation angle information obtained by the rotation angle detection unit to the first controller;

[0042] After the eccentricity information of the rotation center axis is calculated by the first controller, the casing is moved to adjust the relative position of the casing and the rotation center axis.

[0043] Beneficial effect: When adjusting the relative position of the rotating center axis of the blade tip clearance calibration device and the casing, it is only necessary to start the rotating center axis, the first distance measuring unit, the rotation angle detection unit and the first controller to obtain the eccentricity of the rotating center axis relative to the casing. The operator moves the casing accordingly according to the obtained eccentricity, and the centering operation of the rotating center axis can be completed in one go. The centering operation time is short and the centering operation efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0045] Figure 1 Schematic diagram of the structure of an embodiment of the present invention;

[0046] Figure 2 Schematic diagram of the positional relationship between the mounting axis and the first and second distance measuring units according to an embodiment of the present invention;

[0047] Figure 3 Schematic diagram of the working principle of the first controller according to an embodiment of the present invention;

[0048] Figure 4 A schematic diagram of the positional relationship between the first driving member and the second driving member according to an embodiment of the present invention;

[0049] Figure 5 Schematic diagram of the structure of the leveling part of an embodiment of the present invention;

[0050] Figure 6 Schematic diagram of a method for calculating the eccentricity of the rotation center axis relative to the casing according to an embodiment of the present invention;

[0051] Figure 7 Schematic diagram of a method for calculating the offset angle of the rotation center axis relative to the casing according to an embodiment of the present invention.

[0052] Description of reference numerals:

[0053] 1. Rotation center axis; 2. Casing; 3. Mounting axis;

[0054] 4. First distance measuring unit; 5. Rotation angle detection unit;

[0055] 6. First controller; 601. Information receiving module; 602. Calculation module; 603. Information sending module;

[0056] 7. Driving mechanism; 701. First driving member; 702. Second driving member;

[0057] 8. Second ranging unit; 9. Connecting arm; 10. Base; 11. Leveling part; 111. Leveling flange; 112. Bolt hole; 12. Receiver mounting platform. DETAILED DESCRIPTION

[0058] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0059] Please refer to Figure 1-Figure 7 In the first aspect, an embodiment of the present invention provides a centering device suitable for adjusting the relative position of the rotating center axis 1 and the casing 2 of a blade tip clearance calibration device, the centering device comprising: a mounting shaft 3, arranged on the rotating center axis 1, the axial center line of the mounting shaft 3 coincides with the axial center line of the rotating center axis 1; a first distance measuring unit 4, arranged on the mounting shaft 3, suitable for obtaining first distance information between the mounting shaft 3 and the inner wall of the casing 2; a rotation angle detection unit 5, arranged on the mounting shaft 3, suitable for obtaining rotation angle information of the mounting shaft 3; a first controller 6, communicatively connected to the first distance measuring unit 4 and the rotation angle detection unit 5, suitable for calculating the eccentricity information of the rotating center axis 1 based on the obtained first distance information and rotation angle information.

[0060] In this embodiment, refer to Figure 1 Casing 2 is mounted on casing mounting platform 12 and is capable of moving relative to casing mounting platform 12 in the X and Y directions, thereby adjusting the relative position between casing 2 and rotating central shaft 1. Mounting shaft 3 is detachably connected to the end of rotating central shaft 1. After the relative position of rotating central shaft 1 and casing 2 is adjusted, mounting shaft 3 is removed from rotating central shaft 1, and the impeller to be tested is then securely connected to rotating central shaft 1 for subsequent testing. Mounting shaft 3 can be detachably connected to rotating central shaft 1 by means of bolts, clamps, or threads.

[0061] In this embodiment, a first distance measuring unit 4 and a rotation angle detection unit 5 are disposed on the rotating central axis 1 via the mounting shaft 3. The first distance measuring unit 4 and the rotation angle detection unit 5 rotate with the rotating central axis 1 and obtain, in real time, first distance information between the mounting shaft 3 and the inner wall of the casing 2, as well as rotation angle information of the mounting shaft 3. The first distance information and the rotation angle information are transmitted to a first controller 6, which then calculates the eccentricity of the mounting shaft 3 relative to the casing 2 in two directions. Because the mounting shaft 3 and the rotating central axis 1 are coaxially disposed with respect to the centerline, the eccentricity of the mounting shaft 3 relative to the casing 2 in two directions is equal to the eccentricity of the rotating central axis 1 relative to the casing 2 in two directions, thereby facilitating operator adjustment of the relative position of the rotating central axis 1 and the casing 2.

[0062] In a specific embodiment, referring to Figure 6 , establish a coordinate system, with the rotation center axis 1 as the coordinate origin, and the distance between the measured section of the casing 2 and the rotation center axis 1 at different rotation angles as the coordinates of each point. The actual surface of the casing 2 may have concave and convex points on the surface of the measured circle due to processing or other reasons. Therefore, multi-point measurement can be used (generally not less than 10 measuring points), and the coordinate points with large errors are marked and eliminated. A circle is obtained through each coordinate. This circle is the measured section circle of the casing 2, and the offset between the installation center of the casing 2 and the rotation center axis 1 is the coordinate of the center of the circle.

[0063] Specifically, the center of the circle is calculated by using points on the circle, and the center and radius can be fitted using the least squares method.

[0064] The logic is as follows:

[0065] The formula for a circle is:

[0066] (xx c ) 2 +(yy c ) 2 =r 2

[0067] Simplifying, we can get:

[0068]

[0069] Assumptions:

[0070]

[0071] Suppose there are n points on the circle, then:

[0072]

[0073] By analyzing the matrix, we can get the values of a(1), a(2) and a(3), and thus infer x c 、y c and the value of r.

[0074] Where (x c ,y c ) is the coordinate of the center of the circle, that is, the offset between the installation center of the casing 2 and the rotation center axis 1.

[0075] In an optional embodiment, the first controller 6 includes a display screen, and / or the first controller 6 is communicatively connected to a display screen (not shown in the figure), and the eccentricity information of the rotating center axis 1 calculated by the first controller 6 can be displayed on the display screen, allowing the operator to move the casing 2 in different directions according to the eccentricity information.

[0076] For example, based on the eccentricity information obtained, the operator first moves the housing 2 in the X direction. Once the housing 2 is in place in the X direction, the operator then moves the housing 2 in the Y direction. Once the housing 2 is in place in the Y direction, the centering operation of the rotating central shaft 1 is completed. In this way, the eccentricity of the rotating central shaft 1 relative to the housing 2 in the X and Y directions can be directly determined through a single test, thereby completing the centering operation of the rotating central shaft 1 in a single operation, which shortens the time and improves the efficiency of the centering operation.

[0077] Preferably, refer to Figure 1 、 Figure 3 、 Figure 4 , and also includes a driving mechanism 7, which is transmission-connected to the casing 2 and communicatively connected to the first controller 6. The driving mechanism 7 is suitable for obtaining eccentricity information to drive the casing 2 to move relative to the mounting shaft 3.

[0078] In this embodiment, the drive mechanism 7 is disposed on a side of the receiver mounting platform 12 away from the receiver 2. For example, the receiver 2 is disposed above the receiver mounting platform 12, and the drive mechanism 7 is disposed below the receiver mounting platform 12. By providing a transmission connection between the drive mechanism 7 and the receiver 2, the drive mechanism 7 is capable of driving the receiver 2 relative to the rotational axis 1. The drive mechanism 7 obtains the eccentricity information calculated by the first controller 6 and drives the receiver 2 to a preset position based on the eccentricity information. This eliminates the need for an operator to manually adjust the position of the receiver 2, making the receiver 2 position adjustment process simple and convenient, and improving the accuracy of receiver 2 position adjustment.

[0079] Optionally, refer to Figure 1 、 Figure 4 The driving mechanism 7 includes: a first driving member 701, which is connected to the casing 2 and is suitable for driving the casing 2 to move along a first direction; a second driving member 702, which is connected to the casing 2 and is suitable for driving the casing 2 to move along a second direction; wherein the first direction is perpendicular to the second direction.

[0080] In this embodiment, the first driving member 701 and the second driving member 702 can drive the casing 2 to move in different directions, so that the casing 2 can be adjusted in both the X and Y directions, making the position adjustment operation of the casing 2 quick and accurate.

[0081] In a specific embodiment, the first driving member 701 is used to drive the casing 2 in the X direction, and the second driving member 702 is used to drive the casing 2 in the Y direction. The first driving member 701 is a first electrically powered telescopic rod, and the second driving member 702 is a second electrically powered telescopic rod. The telescopic end of the first driving member 701 is connected to the casing 2 to drive the casing 2 in the X direction. The telescopic end of the second driving member 702 is connected to the fixed end of the first driving member 701 to drive the first driving member 701 and the casing 2 in the Y direction. This arrangement enables the casing 2 to move in both the X and Y directions.

[0082] In another specific embodiment, referring to Figure 4 The first driving member 701 is used to drive the casing 2 in the X direction, and the second driving member 702 is used to drive the casing 2 in the Y direction. The first driving member 701 is a first electrically-operated telescopic rod, and the second driving member 702 is a second electrically-operated telescopic rod. The slider on the telescopic end of the first driving member 701 cooperates with the slide rail on the outer wall of the casing 2. The fixed end of the first driving member 701 is fixed to the casing mounting platform 12. The slider on the telescopic end of the second driving member 702 cooperates with the slide rail on the outer wall of the casing 2. The fixed end of the second driving member 702 is fixed to the casing mounting platform 12. When the telescopic end of the first driving member 701 moves, the slider on the telescopic end of the first driving member 701 abuts against the slide rail on the outer wall of the casing 2, and the slider drives the slide rail and the casing 2 to move along the X direction, and the slider on the telescopic end of the second driving member 702 slides with the slide rail on the outer wall of the casing 2, and the second driving member 702 remains stationary; when the telescopic end of the second driving member 702 moves, the slider on the telescopic end of the second driving member 702 abuts against the slide rail on the outer wall of the casing 2, and the slider drives the slide rail and the casing 2 to move along the Y direction, and the slider on the telescopic end of the first driving member 701 slides with the slide rail on the outer wall of the casing 2, and the first driving member 701 remains stationary.

[0083] Alternatively, in addition to the above two configurations, the first driving member 701 and the second driving member 702 may be coordinated in other configurations according to actual needs.

[0084] Optionally, refer to Figure 3 The first controller 6 includes: an information receiving module 601, suitable for receiving first distance information and rotation angle information; a calculation module 602, suitable for calculating the eccentricity information of the installation shaft 3 based on the first distance information and rotation angle information; an information sending module 603, suitable for sending the eccentricity information of the installation shaft 3 to the driving mechanism 7.

[0085] In this embodiment, the first distance measuring unit 4 and the rotation angle detection unit 5 communicate with the first controller 6 via TCP / IP. The information receiving module 601 periodically sends data reception requests to the first distance measuring unit 4 and the rotation angle detection unit 5, and parses the returned data to obtain first distance information between the rotation center axis 1 and the measured flow passage cross-section of the casing 2, as well as rotation angle data of the rotation center axis 1. Thus, the information receiving module 601, the calculation module 602, and the information sending module 603 are used to receive and subsequently calculate the first distance information and rotation angle information. The calculation results are then transmitted to the drive mechanism 7, enabling the drive mechanism 7 to actuate and move the casing 2, thereby improving the efficiency of adjusting the position of the casing 2.

[0086] Optionally, refer to Figure 1 、 Figure 2 , further comprising: a second distance measuring unit 8, which is arranged on the installation shaft 3, the first distance measuring unit 4 and the second distance measuring unit 8 are spaced apart along the axial direction of the installation shaft 3, and the second distance measuring unit 8 is suitable for obtaining second distance information between the installation shaft 3 and the inner wall of the casing 2; a second controller, which is communicatively connected with the first distance measuring unit 4, the rotation angle detection unit 5 and the second distance measuring unit 8, and the second controller is suitable for calculating the offset angle information of the installation shaft 3 according to the obtained first distance information, rotation angle information and second distance information.

[0087] In this embodiment, the second distance measuring unit 8 and the first distance measuring unit 4 are arranged at different heights of the mounting shaft 3. When measuring the eccentricity of the mounting shaft 3, the first distance measuring unit 4, the rotation angle detection unit 5 and the second distance measuring unit 8 cooperate to send the obtained relevant information to the second controller for calculation, and the offset angle information of the mounting shaft 3 can also be obtained, thereby facilitating the operator to adjust the offset angle of the mounting shaft 3, thereby further improving the accuracy of the relative position of the rotating center axis 1 and the casing 2.

[0088] In the above embodiment, the second controller (not shown) is preferably used in the same manner as the first controller 6, that is, the information receiving module periodically sends data reception requests to the first distance measuring unit 4, the rotation angle detection unit 5, and the second distance measuring unit 8, and parses the returned data to obtain first and second distance information between the rotation center axis 1 and the measured flow passage section of the casing 2, as well as the rotation angle data of the rotation center axis 1, to calculate the offset angle information between the rotation center axis 1 and the casing 2. After obtaining the offset angle information, the operator manually adjusts the relative position of the rotation center axis 1 and the casing 2 to improve the relative position accuracy of the rotation center axis 1 and the casing 2.

[0089] In a specific embodiment, referring to Figure 7, the first distance measuring unit 4 and the second distance measuring unit 8 are used to measure the casing 2 at different heights, and the first cross-sectional circle and the second cross-sectional circle of the casing 2 at two different heights can be calculated. The center 1 of the first cross-sectional circle and the center 2 of the second cross-sectional circle are respectively (x c1 ,y c1 ,h1) and (x c2 ,y c2 ,h2), the line between the center 1 of the first cross-section circle and the center 2 of the second cross-section circle is the installation axis of the casing 2. It can be seen that the angle between the installation axis and the Z-axis direction of the rotation center axis 1 is the installation offset angle of the casing 2.

[0090] We can get:

[0091]

[0092] The installation distance h between the first distance measuring unit 4 and the second distance measuring unit 8 in the height direction is known, h = h1 - h2, and we can get:

[0093]

[0094] At the same time, the offset angle of the casing 2 installed in the X direction is:

[0095]

[0096] The offset angle of the casing 2 in the Y direction is:

[0097]

[0098] Finally, the operator adjusts the tilt angle of the rotation center axis 1 by adjusting the offset angle of the casing 2 in the X direction and the offset angle of the Y direction.

[0099] Preferably, during the centering and leveling operation, the offset angle of the rotating center axis 1 relative to the casing 2 can be first tested and calculated. After the rotating center axis 1 is moved and the leveling operation is performed on the rotating center axis 1, the eccentricity of the rotating center axis 1 relative to the casing 2 is tested again. After the casing 2 is moved to center the rotating center axis 1, the leveling and centering operation of the rotating center axis 1 is completed.

[0100] Optionally, refer to Figure 1 、 Figure 2 , and also includes a connecting arm 9, which is suitable for extending in a direction perpendicular to the axial direction of the mounting shaft 3; wherein the connecting arm 9 is suitable for connecting the first ranging unit 4 and the mounting shaft 3; and / or, the connecting arm 9 is suitable for connecting the second ranging unit 8 and the mounting shaft 3.

[0101] In this embodiment, when both the first distance measuring unit 4 and the second distance measuring unit 8 are disposed on the connecting arm 9, two connecting arms 9 are provided, and the first distance measuring unit 4 and / or the second distance measuring unit 8 are disposed on the connecting arms 9. This facilitates connection and removal of the first distance measuring unit 4 and / or the second distance measuring unit 8 from the mounting shaft 3. Furthermore, the connecting arms 9 can be used to change the distance between the first distance measuring unit 4 and / or the second distance measuring unit 8 and the inner wall of the casing 2, thereby meeting different testing requirements.

[0102] For example, when the first distance measuring unit 4 is set on the connecting arm 9, when different rotation angles are obtained, the distance between the measured cross-section of the casing 2 and the rotation center axis 1 is the coordinate of each point, and the distance between the measured cross-section of the casing 2 and the rotation center axis 1 is the sum of the distance between the rotation center axis 1 and the first distance measuring unit 4 and the distance between the first distance measuring unit 4 and the inner wall of the casing 2.

[0103] In an optional embodiment, the first distance measuring unit 4 and / or the second distance measuring unit 8 are connected to the connecting arm 9 by means of a bolt connection or a clamp connection. In this way, the position of the first distance measuring unit 4 and / or the second distance measuring unit 8 on the connecting arm 9 can be easily adjusted to meet different testing requirements.

[0104] Optionally, refer to Figure 1 、 Figure 2 , the first distance measuring unit 4 is a first displacement sensor; and / or, the second distance measuring unit 8 is a second displacement sensor; and / or, the rotation angle detection unit 5 is a rotary encoder.

[0105] In this embodiment, the first ranging unit 4 and the second ranging unit 8 preferably use displacement sensors to detect the distance between them and the casing 2. The displacement sensors are simple to use and have high accuracy. The rotation angle detection unit 5 preferably uses a rotary encoder. The connection between the rotary encoder and the mounting shaft 3 is simple and has high accuracy, thereby improving the accuracy of the centering and leveling operations.

[0106] In a second aspect, an embodiment of the present invention provides a blade tip clearance calibration device, comprising: any one of the above-mentioned centering devices.

[0107] Optionally, refer to Figure 1 、 Figure 5 , and also includes: a base 10, arranged below the rotating center axis 1; a leveling portion 11, arranged on the base 10, the rotating center axis 1 passes through the leveling portion 11, and rotates with the leveling portion 11, the leveling portion 11 is suitable for moving relative to the base 10 to adjust the offset angle of the rotating center axis 1 relative to the casing 2.

[0108] In this embodiment, the leveling part 11 is arranged on the base 10, and the rotating center axis 1 is arranged in the leveling part 11. By changing the relative position of the leveling part 11 and the base 10, the leveling part 11 drives the rotating center axis 1 to move synchronously, thereby adjusting the offset angle of the rotating center axis 1 relative to the casing 2, and realizing the leveling operation of the rotating center axis 1.

[0109] In one specific embodiment, the leveling portion 11 includes a leveling flange 111. The rotating central shaft 1 is inserted through the leveling flange 111 and rotatably engaged with the leveling flange 111 via bearings. The leveling flange 111 is circumferentially provided with multiple bolt holes 112. Bolts are inserted into the bolt holes 112, and the ends of the bolts are threadedly connected to the base 10. After determining the offset angle of the rotating central shaft 1, the operator adjusts the various bolts on the leveling flange 111 to change the tilt angle of the leveling flange 111 relative to the base 10, thereby driving the tilt angle of the rotating central shaft 1 to achieve leveling of the rotating central shaft 1.

[0110] In a third aspect, the present invention provides a centering method, which is applied to any of the above-mentioned centering devices, or to any of the above-mentioned tip clearance calibration devices, including: starting the rotating center axis 1, the first distance measuring unit 4, the rotation angle detection unit 5 and the first controller 6, and sending the first distance information obtained by the first distance measuring unit 4 and the rotation angle information obtained by the rotation angle detection unit 5 to the first controller 6; after the eccentricity information of the rotating center axis 1 is calculated by the first controller 6, the casing 2 is moved to adjust the relative position of the casing 2 and the rotating center axis 1.

[0111] In this embodiment, when adjusting the relative position of the rotating center axis 1 and the casing 2 of the blade tip clearance calibration device, it is only necessary to start the rotating center axis 1, the first distance measuring unit 4, the rotation angle detection unit 5 and the first controller 6 to obtain the eccentricity of the rotating center axis 1 relative to the casing 2. The operator moves the casing 2 accordingly according to the obtained eccentricity, and the centering operation of the rotating center axis 1 can be completed in one go. The centering operation time is short and the centering operation efficiency is high.

[0112] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A centering device, characterized in that: Suitable for adjusting the relative position of a rotation center axis (1) of a blade tip clearance calibration device and a casing (2), the centering device comprising: A mounting shaft (3) is arranged on the rotation center shaft (1), and the axial center line of the mounting shaft (3) coincides with the axial center line of the rotation center shaft (1); A first distance measuring unit (4) is provided on the mounting shaft (3) and is suitable for obtaining first distance information between the mounting shaft (3) and the inner wall of the casing (2); A rotation angle detection unit (5), arranged on the installation shaft (3), adapted to obtain rotation angle information of the installation shaft (3); A first controller (6) is connected to the first distance measuring unit (4) and the rotation angle detection unit (5) for communication, and is adapted to calculate eccentricity information of the rotation center axis (1) based on the acquired first distance information and the rotation angle information.

2. The centering device according to claim 1, characterized in that: The invention also includes a driving mechanism (7), which is in transmission connection with the casing (2) and in communication connection with the first controller (6). The driving mechanism (7) is suitable for obtaining the eccentricity information to drive the casing (2) to move relative to the mounting shaft (3).

3. The centering device according to claim 2, characterized in that: The driving mechanism (7) comprises: A first driving member (701) is connected to the casing (2) and is suitable for driving the casing (2) to move along a first direction; A second driving member (702) is connected to the casing (2) and is suitable for driving the casing (2) to move along a second direction; Wherein, the first direction is perpendicular to the second direction.

4. The centering device according to claim 2, characterized in that: The first controller (6) comprises: An information receiving module (601), adapted to receive the first distance information and the rotation angle information; a calculation module (602), adapted to calculate eccentricity information of the installation shaft (3) based on the first distance information and the rotation angle information; The information sending module (603) is adapted to send the eccentricity information of the mounting shaft (3) to the driving mechanism (7).

5. The centering device according to any one of claims 1 to 4, characterized in that: Also includes: a second distance measuring unit (8) disposed on the mounting shaft (3), the first distance measuring unit (4) and the second distance measuring unit (8) being spaced apart along the axial direction of the mounting shaft (3), the second distance measuring unit (8) being adapted to obtain second distance information between the mounting shaft (3) and the inner wall of the casing (2); A second controller is communicatively connected to the first distance measuring unit (4), the rotation angle detection unit (5) and the second distance measuring unit (8), and the second controller is adapted to calculate the offset angle information of the installation axis (3) based on the acquired first distance information, the rotation angle information and the second distance information.

6. The centering device according to claim 5, characterized in that: It also includes a connecting arm (9) adapted to extend in a direction perpendicular to the axial direction of the mounting shaft (3); Wherein, the connecting arm (9) is suitable for connecting the first distance measuring unit (4) and the mounting shaft (3); And / or, the connecting arm (9) is suitable for connecting the second distance measuring unit (8) and the mounting shaft (3).

7. The centering device according to claim 5, characterized in that: The first distance measuring unit (4) is a first displacement sensor; And / or, the second distance measuring unit (8) is a second displacement sensor; And / or, the rotation angle detection unit (5) is a rotary encoder.

8. A tip clearance calibration device, characterized in that: include: The centering device according to any one of claims 1 to 7.

9. The tip clearance calibration device according to claim 8, characterized in that: Also includes: A base (10) is arranged below the rotation center axis (1); The leveling portion (11) is provided on the base (10), the rotation center axis (1) is passed through the leveling portion (11) and is rotatably engaged with the leveling portion (11), and the leveling portion (11) is adapted to move relative to the base (10) to adjust the offset angle of the rotation center axis (1) relative to the casing (2).

10. A centering method, applied to the centering device according to any one of claims 1 to 7, or applied to the blade tip clearance calibration device according to any one of claims 8 to 9, characterized in that: include: The rotation center axis (1), the first distance measuring unit (4), the rotation angle detection unit (5) and the first controller (6) are started, and the first distance information obtained by the first distance measuring unit (4) and the rotation angle information obtained by the rotation angle detection unit (5) are sent to the first controller (6); After the eccentricity information of the rotation center axis (1) is calculated by the first controller (6), the casing (2) is moved to adjust the relative position of the casing (2) and the rotation center axis (1).

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