Adjustable stator blade mounting angle measuring device and method

Abstract

The invention belongs to the field of aero-engine assembly detection, and discloses an adjustable stator blade mounting angle measuring device and method, and the device comprises a positioning structure, a rotating mechanism, and a measuring mechanism. One end of the positioning structure is connected with the stator casing, and the other end is connected with the air-floating turntable; one end of the rotating mechanism penetrates through the positioning structure to be connected with the air-floating turntable, and the other end is connected with one end of the measuring mechanism; the rotating mechanism can drive the measuring mechanism to axially rotate, and the measuring mechanism can perform axial height adjustment on the rotating mechanism; the other end of the measuring mechanism is provided with a measuring assembly which is used for measuring the installation angle of each adjustable stator blade in the stator casing. And the positioning structure, the rotating mechanism and the stator casing are coaxially arranged. Concentric double-shaft free rotation of the gas compressor stator casing and the measuring mechanism is achieved, measurement can be completed without moving the stator casing and the measuring mechanism for multiple times by an operator, and the problems that in the prior art, measurement and rotation are carried out at the same time, so that a measuring device rotates and rolls over, and the end face of the casing is abraded are solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of aero-engine assembly detection, and relates to a variable stator blade installation angle measuring device and method, in particular to a compressor variable stator blade installation angle measuring device and method. BACKGROUND

[0002] As an important component of the compressor stator assembly, the advanced engine usually adopts multi-stage variable stator blades, and through the adjustment of the variable stator blades within a certain angle range, the inlet angle and attack angle requirements of the airflow flowing into the rotor blades are met, so as to effectively improve the compressor flow field, widen the stable working range of the compressor, and better realize the anti-surge function, therefore, the detection and control of the variable stator blade installation angle is an important link in the development of the compressor.

[0003] In order to realize the control of the variable stator blade installation angle, the fixed section angle of each variable stator blade needs to be measured and controlled during assembly. At present, the existing measuring device uses the rear end face stop of the compressor stator casing for positioning, and the positioning assembly and the compressor stator casing cannot rotate freely, and when in use, the operator needs to push the positioning assembly close to the casing end face stop to adjust the measurement position. Since the positioning reference surface, the casing end face and the casing and the platform are all sliding friction, the casing end face is easily worn during operation. In addition, the existing measuring device has a complex structure, a long detection cantilever, and the detection method is easy to cause the measuring device to rotate and overturn, and is highly dependent on the skills and experience of the operator, and has low accuracy, inconvenient operation, high labor intensity and low efficiency. SUMMARY

[0004] The present application aims to overcome the above-mentioned shortcomings of the prior art, and provides a variable stator blade installation angle measuring device and method.

[0005] In order to achieve the above-mentioned purpose, the following technical solutions are adopted: In a first aspect, the present application provides a variable stator blade installation angle measuring device, which comprises a positioning structure, a rotating mechanism and a measuring mechanism; one end of the positioning structure is used to connect the stator casing, and the other end is used to connect the air floating turntable; one end of the rotating mechanism penetrates through the positioning structure and is used to connect the air floating turntable, and the other end is connected with one end of the measuring mechanism; the rotating mechanism can drive the measuring mechanism to rotate axially, and the measuring mechanism can be adjusted in axial height on the rotating mechanism; a measuring assembly is arranged on the other end of the measuring mechanism, and the measuring assembly is used to measure the installation angle of each variable stator blade in the stator casing; in the use state, the positioning structure, the rotating mechanism and the stator casing are coaxially arranged.

[0006] Optionally, the positioning structure comprises a body; a casing connector is arranged on the body, and the casing connector is used for connecting the stator casing; a mounting hole is arranged on the body, and one end of the rotating mechanism penetrates through the mounting hole and is used for connecting the air floating turntable; an air floating turntable connector is arranged on the body, and the air floating turntable connector is used for connecting the air floating turntable.

[0007] Optionally, the casing connector comprises a bolt and a nut; one end of the bolt penetrates through the stator casing and the body and is connected with the nut; the air floating turntable connector comprises a connecting screw, one end of the connecting screw penetrates through the body and is used for connecting the air floating turntable, and a connecting washer is arranged between the connecting screw and the body.

[0008] Optionally, a lifting ring is arranged on the body, and the lifting ring is connected with the body through a lifting ring screw; a lifting ring bushing is arranged between the lifting ring and the body.

[0009] Optionally, the rotating mechanism comprises a column, a first connecting shaft and a second connecting shaft; a plurality of height positioning holes for connecting one end of the measuring mechanism are circumferentially arranged on the column; one end of the second connecting shaft penetrates through the positioning structure and is used for connecting the air floating turntable, and the other end is connected with the first connecting shaft; the first connecting shaft and the second connecting shaft are coaxially arranged; one end of the column is arranged inside the first connecting shaft and the second connecting shaft; a roller bearing is arranged between the column and the first connecting shaft; and a ball bearing is arranged between the column and the second connecting shaft.

[0010] Optionally, a connecting shaft screw is arranged on one end of the second connecting shaft penetrating through the positioning structure and used for connecting the air floating turntable, the connecting shaft screw is used for connecting the air floating turntable, and a connecting shaft washer is arranged between the connecting shaft screw and the second connecting shaft.

[0011] Optionally, the measuring mechanism comprises a height positioning pin, a guide arm, a fixing piece, a measuring arm, a rotating shaft, a positioning seat, a measuring rod and an inclinometer; one end of the height positioning pin is connected with the height positioning hole, and the other end is sequentially connected with the guide arm and the fixing piece; a length positioning pin is arranged on the fixing piece, a plurality of length positioning holes are arranged on the measuring arm, and the length positioning pin is connected with the length positioning hole; the fixed end of the rotating shaft is connected with the measuring arm, and the rotating end is connected with the positioning seat; the measuring rod and the inclinometer are arranged on the positioning seat, and the measuring rod is connected with the inclinometer.

[0012] Optionally, the measuring rod is a U-shaped measuring rod, and the open end of the U-shaped measuring rod faces the stator casing in the use state.

[0013] Optionally, a plurality of through holes are arranged on the guide arm.

[0014] In the second aspect of the present application, a variable stator blade installation angle measuring method based on the variable stator blade installation angle measuring device is provided, comprising: connecting the positioning structure with the stator casing and fixing it on the air floating turntable; connecting the one end of the rotating mechanism with the air floating turntable through the positioning structure, and ensuring that the positioning structure, the rotating mechanism and the stator casing are coaxially arranged; adjusting the height of the measuring mechanism according to the measurement requirement, and measuring the installation angle of each variable stator blade in the stator casing by rotating the air floating turntable and the measuring mechanism and combining the measuring assembly.

[0015] Compared with the prior art, the present application has the following beneficial effects: The variable stator blade installation angle measuring device of the present application connects the positioning structure and the rotating mechanism with the air floating turntable, the rotating mechanism can drive the axial rotation of the measuring mechanism, and the measuring mechanism can be axially adjusted in height on the rotating mechanism; the measuring assembly is arranged on the other end of the measuring mechanism, and the measuring assembly is used to measure the installation angle of each variable stator blade in the stator casing; in the use state, the positioning structure, the rotating mechanism and the stator casing are coaxially arranged. By combining the air floating turntable and the rotating mechanism, the positioning reference of the measuring device is improved from the end face of the casing to the shaft center of the casing, the concentric double shafts of the stator casing and the measuring mechanism are freely rotated, the measurement can be completed without moving the stator casing and the measuring mechanism by the operator for multiple times, and problems such as rotation side turning of the measuring device and end face wear of the casing caused by measurement and rotation in the prior art are avoided. The present application is convenient and labor-saving, greatly reduces the labor intensity of the operator, and is suitable for measuring other similar variable stator blades.

[0016] The variable stator blade installation angle measuring method of the present application fixes the positioning structure and the stator casing on the air floating turntable after connecting them; connects the one end of the rotating mechanism with the air floating turntable through the positioning structure, and ensures that the positioning structure, the rotating mechanism and the stator casing are coaxially arranged, so as to realize the rolling rotation of the stator casing and the measuring device, one person can complete the detection, saves human resources, reduces labor intensity, and is convenient to disassemble, simple to operate, convenient to measure, realizes efficient, precise and fast detection process, and improves the measurement quality and efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the variable stator blade installation angle measuring device of the embodiment of the present application.

[0018] Figure 2 It is a schematic diagram of the positioning structure of the embodiment of the present application.

[0019] Figure 3 It is a schematic diagram of the rotating mechanism of the embodiment of the present application.

[0020] Figure 4 It is a schematic diagram of the measuring mechanism of the embodiment of the present application.

[0021] Wherein: 1-Positioning structure; 2-Rotating mechanism; 3-Measuring mechanism; 11-Body; 12-Bolt; 13-Nut; 14-Connecting screw; 15-Connecting washer; 16-Lifting ring; 21-Column; 22-First connecting shaft; 23-Second connecting shaft; 24-Roller bearing; 25-Ball bearing; 26-Connecting shaft screw; 27-Connecting shaft washer; 28-First clamping nut; 29-Second clamping nut; 210-Pressure ring; 211-Third clamping nut; 31-Guide arm; 32-Fixing component; 33-Measuring arm; 34-Rotating shaft; 35-Positioning seat; 36-Measuring rod; 37-Inclinometer; 38-Length positioning pin; 39-Height positioning pin; 310-Star handle; 311-Measuring rod screw. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0023] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0024] The present invention will now be described in further detail with reference to the accompanying drawings: See Figure 1 In one embodiment of the present invention, an adjustable stator blade mounting angle measuring device is provided, including a positioning structure 1, a rotating mechanism 2, and a measuring mechanism 3.

[0025] Positioning structure 1 is connected to the stator housing at one end and to the air-bearing turntable at the other end. Rotating mechanism 2 passes through positioning structure 1 at one end to connect to the air-bearing turntable, and is connected to one end of measuring mechanism 3 at the other end. Rotating mechanism 2 can drive measuring mechanism 3 to rotate axially, and measuring mechanism 3 can be adjusted axially on rotating mechanism 2. A measuring component is installed on the other end of measuring mechanism 3, which is used to measure the installation angle of each adjustable stator blade inside the stator housing. In operation, positioning structure 1, rotating mechanism 2, and stator housing are coaxially arranged.

[0026] This invention relates to an adjustable stator blade mounting angle measuring device. A positioning structure and a rotating mechanism are connected to an air-bearing turntable. The rotating mechanism drives the measuring mechanism to rotate axially, and the measuring mechanism can be adjusted axially in height via the rotating mechanism. A measuring component is mounted on the other end of the measuring mechanism to measure the mounting angle of each adjustable stator blade within the stator housing. In operation, the positioning structure, rotating mechanism, and stator housing are coaxially aligned. By combining the air-bearing turntable and rotating mechanism, the positioning reference of the measuring device is changed from the end face of the housing to the housing axis, enabling free concentric dual-axis rotation of the stator housing and measuring mechanism. Measurement can be completed without the operator repeatedly moving the stator housing and measuring mechanism, avoiding problems such as device tilting and end face wear caused by simultaneous measurement and rotation in existing technologies. This invention is convenient and labor-saving, significantly reducing the operator's workload, and is applicable to the measurement of other similar adjustable stator blades.

[0027] In one possible implementation, see Figure 2 The positioning structure 1 includes a body 11; a casing connector is provided on the body 11 for connecting the stator casing; a mounting hole is provided on the body 11, and one end of the rotating mechanism 2 passes through the mounting hole for connecting the air-bearing turntable; an air-bearing turntable connector is provided on the body 11 for connecting the air-bearing turntable.

[0028] Explanatoryly, the positioning structure 1 mainly consists of the body 11 and various connecting parts. Its lower part is connected to the air-bearing turntable, and its upper part is connected to the stator housing. It is mainly used to provide positioning for the stator housing on the air-bearing turntable, ensuring that the stator housing is coaxial with the air-bearing turntable and the rotating mechanism 2.

[0029] In one possible implementation, the casing connector includes a bolt 12 and a nut 13; one end of the bolt 12 passes through the stator casing and the body 11 and is connected to the nut 13.

[0030] In one possible implementation, the air-bearing turntable connector includes a connecting screw 14, one end of which passes through the body 11 and is used to connect the air-bearing turntable, and a connecting washer 15 is provided between the connecting screw 14 and the body 11.

[0031] For example, bolt 12 and nut 13 are respectively hexagonal nuts and hexagonal head bolts, and connecting screw 14 is an internal hexagonal head screw.

[0032] In one possible implementation, a lifting ring 16 is provided on the body 11, and the lifting ring 16 is connected to the body 11 by a lifting ring screw; a lifting ring bushing is provided between the lifting ring 16 and the body 11.

[0033] Explanatoryly, due to the large weight of the overall device, lifting rings 16 are provided to facilitate installation. At the same time, the lifting ring bushings can reduce friction and wear between the lifting rings 16 and the body 11, avoid surface damage caused by direct contact between the two, and also buffer the impact force during lifting. Several lifting rings 16 are generally provided and evenly distributed on the body 11. Multiple lifting rings 16 can distribute the load, prevent single-point overload breakage, ensure stable lifting posture, avoid component collision due to device tilting, and further improve installation safety and structural integrity.

[0034] In one possible implementation, see Figure 3 The rotating mechanism 2 includes a column 21, a first connecting shaft 22, and a second connecting shaft 23. The column 21 has several height positioning holes circumferentially opened for connecting to one end of the measuring mechanism 3. One end of the second connecting shaft 23 passes through the positioning structure 1 to connect to the air-bearing turntable, and the other end is connected to the first connecting shaft 22. The first connecting shaft 22 and the second connecting shaft 23 are coaxially arranged. One end of the column 21 is located inside the first connecting shaft 22 and the second connecting shaft 23. A roller bearing 24 is provided between the column 21 and the first connecting shaft 22. A ball bearing 25 is provided between the column 21 and the second connecting shaft 23.

[0035] Explained, the rotating mechanism 2 mainly consists of a column 21, a first connecting shaft 22, a roller bearing 24, a ball bearing 25, and a second connecting shaft 23. The double bearing structure allows the rotating mechanism 2 to rotate freely. Its lower part is connected to the air-bearing turntable, and its upper part is used to fix the measuring mechanism 3. During measurement, the measuring mechanism 3 is fixed in the positioning holes at the corresponding heights of the column 21, which facilitates positioning and measuring the height required for the installation angle of each stage of the adjustable stator blades.

[0036] In one possible implementation, a first clamping nut 28, a second clamping nut 29, a pressure ring 210, and a third clamping nut 211 are provided for relative stability between the ball bearing 25 and the second connecting shaft 23, as well as relative stability between the first connecting shaft 22 and the second connecting shaft 23, to ensure stable operation of the rotating mechanism 2.

[0037] In one possible implementation, a connecting shaft screw 26 is provided on one end of the second connecting shaft 23 that passes through the positioning structure 1 for connecting the air-bearing turntable. The connecting shaft screw 26 is used to connect the air-bearing turntable, and a connecting shaft washer 27 is provided between the connecting shaft screw 26 and the second connecting shaft 23.

[0038] Explanatoryly, the connecting shaft screw 26 enables the detachable and fixed connection between the second connecting shaft 23 and the air-bearing turntable. The connecting shaft washer 27 avoids wear caused by direct contact between the two, while enhancing the sealing and stability of the connection and preventing the connection failure caused by the connecting shaft screw 26 loosening.

[0039] In one possible implementation, see Figure 4 The measuring mechanism 3 includes a height positioning pin 39, a guide arm 31, a fixing member 32, a measuring arm 33, a rotating shaft 34, a positioning seat 35, a measuring rod 36, and an inclinometer 37. One end of the height positioning pin is connected to a height positioning hole, and the other end is connected to the guide arm 31 and the fixing member 32 in sequence. A length positioning pin 38 is provided on the fixing member 32, and a plurality of length positioning holes are provided on the measuring arm 33. The length positioning pin 38 is connected to the length positioning holes. The fixed end of the rotating shaft 34 is connected to the measuring arm 33, and the rotating end is connected to the positioning seat 35. The measuring rod 36 and the inclinometer 37 are both provided on the positioning seat 35, and the measuring rod 36 is connected to the inclinometer 37.

[0040] Explanatoryly, the measuring mechanism 3 and the air-bearing turntable can be rotated coaxially by the rotating mechanism 2; the axial dimension required for measuring the 0, 1, and 2-level adjustable stator blades can be easily adjusted on the measuring arm 33 using the length positioning pin 38; when the rotating shaft 34 rotates, the inclinometer 37 displays the angle value measured by the measuring rod 34.

[0041] Explanatoryly, the pin holes designed on the column 21 and the measuring arm 33 provide positioning for the axial and radial distances required for measuring the adjustable stator blades at each stage, making the operation simple and quick.

[0042] Optionally, the inclinometer 37 uses a digital display inclinometer to ensure measurement accuracy.

[0043] In one possible implementation, the measuring rod 36 is a U-shaped measuring rod, with the open end of the U-shaped measuring rod facing the stator housing when in use. Explained, when measuring the installation angle, the position of the measuring rod 36 typically needs to be adjusted manually. However, the internal structure of the stator housing is complex. By designing the measuring rod in a U-shape, space can be provided for the operator to adjust the measuring rod 34, avoiding interference with other parts during adjustment, and preventing damage to the adjustable stator blades during adjustment.

[0044] In one possible implementation, the guide arm 31 is provided with several through holes. Explained, the main purpose of providing several through holes on the guide arm 31 is to reduce the weight of the guide arm 31, so as to ensure the stability of the rotating mechanism 2 and the measuring component.

[0045] In one possible implementation, the measuring mechanism 3 further includes a star-shaped handle 310. Two opposing semi-ring assemblies are provided on one side of the guide arm 31 connected to the column 21. The two semi-ring assemblies are sleeved on the column 21, and the gap between the two semi-ring assemblies is adjusted by the star-shaped handle 310, thereby enabling a stable connection between the guide arm 31 and the column 21 and ensuring the accuracy of the measurement results.

[0046] In one possible implementation, the measuring mechanism 3 further includes a measuring rod screw 311 for fixing the measuring rod 36 to the rotating shaft 34.

[0047] In another embodiment of the present invention, an adjustable stator blade mounting angle measurement method based on the above-mentioned adjustable stator blade mounting angle measuring device is provided, comprising the following steps: After connecting the positioning structure 1 to the stator housing, fix it on the air-bearing turntable; pass one end of the rotating mechanism 2 through the positioning structure 1 and connect it to the air-bearing turntable, and ensure that the positioning structure 1, the rotating mechanism 2 and the stator housing are coaxially set; adjust the height of the measuring mechanism 3 according to the measurement requirements, and measure the installation angle of each adjustable stator blade in the stator housing by rotating the air-bearing turntable and the measuring mechanism 3, and in conjunction with the measuring components.

[0048] Explanatoryly, by connecting and fixing the positioning structure 1 to the stator housing onto the air-bearing turntable, and connecting one end of the rotating mechanism 2 through the positioning structure 1 to the air-bearing turntable, and ensuring that the positioning structure 1, the rotating mechanism 2, and the stator housing are coaxially arranged, the stator housing and the measuring device can be rolled and rotated. One person can complete the inspection, saving manpower, reducing labor intensity, and making disassembly convenient, operation simple, and measurement convenient. This achieves an efficient, precise, and fast inspection process, improving measurement quality and efficiency.

[0049] In one possible implementation, the adjustable stator blade mounting angle measurement method includes the following detailed steps: Step 1: Fix the positioning mechanism 1 on the air-bearing turntable.

[0050] Step 2: Fix the rotating mechanism 2 onto the air-bearing turntable.

[0051] Step 3: Place the stator housing on the positioning mechanism 1 for stop positioning, and tighten it with screws.

[0052] Step 4: Install the measuring mechanism 3 into the column 21, adjust it to the 0-level adjustable stator blade measuring height using the height positioning pin 39, and then tighten the star handle 310.

[0053] Step 5: Adjust the measuring arm 31 to the measuring section of the adjustable stator blade at level 0, and fix it with the length positioning pin 38.

[0054] Step 6: Rotate the measuring rod 36 to a vertical position, tighten the inclinometer 37, and then set it to zero.

[0055] Step 7: Loosen the inclinometer 37 and adjust the measuring rod 36 to the cross section of the adjustable stator blade to be measured.

[0056] Step 8: Rotate the measuring rod 36 until it fits the inlet and outlet sides of the adjustable stator blade measuring section, then fix the measuring rod 36. Once the reading of the inclinometer 37 is stable, the value can be read.

[0057] Step 9: Loosen the measuring rod 36, rotate the measuring mechanism 3, and adjust the measuring rod 36 to the cross section of the next adjustable stator blade to be measured. Measure the entire circle of adjustable stator blades in sequence.

[0058] Step 10: After the measurement is completed, remove the measuring device and disassemble the stator casing.

[0059] Step 11: Install the first and second stage adjustable stator blades and repeat steps 3 to 10 respectively to complete the installation angle measurement of each stage of adjustable stator blades.

[0060] In summary, the adjustable stator blade installation angle measuring device and method of this invention offers advantages such as accurate measurement position, high measurement precision, rapid completion of full-circle adjustable stator blade installation angle measurement, and complete avoidance of the rotational tilting of the measuring device and wear on the stator casing end face caused by simultaneous measurement and rotation in existing technologies. Furthermore, it provides positioning for the axial and radial distances required for measuring each stage of adjustable stator blades, offers ample operating space, and is simple and quick to operate, reducing labor costs. In addition, it is convenient and labor-saving, significantly reducing the operator's workload. Moreover, the concentric dual-axis rotation and positioning technology of the stator casing and measuring mechanism implemented in this invention can be extended to the measurement of adjustable stator blade installation angles of other similar structures.

[0061] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. An adjustable stator blade mounting angle measuring device, characterized in that, It includes a positioning structure (1), a rotating mechanism (2), and a measuring mechanism (3); One end of the positioning structure (1) is used to connect to the stator casing, and the other end is used to connect to the air-bearing turntable; one end of the rotating mechanism (2) passes through the positioning structure (1) to connect to the air-bearing turntable, and the other end is connected to one end of the measuring mechanism (3); the rotating mechanism (2) can drive the measuring mechanism (3) to rotate axially, and the measuring mechanism (3) can be adjusted axially on the rotating mechanism (2); a measuring component is set on the other end of the measuring mechanism (3), and the measuring component is used to measure the installation angle of each adjustable stator blade in the stator casing; When in use, the positioning structure (1), the rotating mechanism (2), and the stator casing are arranged coaxially.

2. The adjustable stator blade mounting angle measuring device according to claim 1, characterized in that, The positioning structure (1) includes a body (11); A casing connector is provided on the main body (11), which is used to connect the stator casing; Mounting holes are provided on the main body (11), and one end of the rotating mechanism (2) passes through the mounting holes to connect to the air-floating turntable; An air-floating turntable connector is provided on the main body (11), which is used to connect the air-floating turntable.

3. The adjustable stator blade mounting angle measuring device according to claim 2, characterized in that, The casing connector includes a bolt (12) and a nut (13); one end of the bolt (12) passes through the stator casing and the body (11) and is connected to the nut (13); The air-bearing turntable connector includes a connecting screw (14), one end of which passes through the body (11) and is used to connect the air-bearing turntable. A connecting washer (15) is provided between the connecting screw (14) and the body (11).

4. The adjustable stator blade mounting angle measuring device according to claim 2, characterized in that, A lifting ring (16) is provided on the main body (11), and the lifting ring (16) is connected to the main body (11) by a lifting ring screw; A lifting ring bushing is provided between the lifting ring (16) and the body (11).

5. The adjustable stator blade mounting angle measuring device according to claim 1, characterized in that, The rotating mechanism (2) includes a column (21), a first connecting shaft (22), and a second connecting shaft (23); The column (21) has several height positioning holes for connecting to one end of the measuring mechanism (3) in the forward direction; One end of the second connecting shaft (23) passes through the positioning structure (1) to connect to the air-floating turntable, and the other end is connected to the first connecting shaft (22); the first connecting shaft (22) and the second connecting shaft (23) are coaxially arranged; One end of the column (21) is located inside the first connecting shaft (22) and the second connecting shaft (23); A roller bearing (24) is provided between the column (21) and the first connecting shaft (22); A ball bearing (25) is provided between the column (21) and the second connecting shaft (23).

6. The adjustable stator blade mounting angle measuring device according to claim 5, characterized in that, The second connecting shaft (23) passes through the positioning structure (1) and is connected to the air-floating turntable. A connecting shaft screw (26) is provided on one end of the connecting shaft (23). The connecting shaft screw (26) is used to connect the air-floating turntable. A connecting shaft washer (27) is provided between the connecting shaft screw (26) and the second connecting shaft (23).

7. The adjustable stator blade mounting angle measuring device according to claim 5, characterized in that, The measuring mechanism (3) includes a height positioning pin (39), a guide arm (31), a fixing piece (32), a measuring arm (33), a rotating shaft (34), a positioning seat (35), a measuring rod (36), and an inclinometer (37). One end of the height positioning pin is connected to the height positioning hole, and the other end is connected to the guide arm (31) and the fixing part (32) in sequence; the fixing part (32) is provided with a length positioning pin (38), and the measuring arm (33) is provided with several length positioning holes, and the length positioning pin (38) is connected to the length positioning hole; the fixed end of the rotating shaft (34) is connected to the measuring arm (33), and the rotating end is connected to the positioning seat (35). The measuring rod (36) and the inclinometer (37) are both set on the positioning seat (35), and the measuring rod (36) is connected to the inclinometer (37).

8. The adjustable stator blade mounting angle measuring device according to claim 7, characterized in that, The measuring rod (36) is a U-shaped measuring rod, and when in use, the open end of the U-shaped measuring rod faces the stator casing.

9. The adjustable stator blade mounting angle measuring device according to claim 7, characterized in that, The guide arm (31) is provided with several through holes.

10. A method for measuring the adjustable stator blade mounting angle based on the adjustable stator blade mounting angle measuring device according to any one of claims 1 to 9, characterized in that, include: After the positioning structure (1) is connected to the stator casing, it is fixed on the air-bearing turntable; One end of the rotating mechanism (2) is passed through the positioning structure (1) and connected to the air-floating turntable, and the positioning structure (1), the rotating mechanism (2) and the stator casing are set coaxially. Adjust the height of the measuring mechanism (3) according to the measurement requirements, and measure the installation angle of each adjustable stator blade in the stator casing by rotating the air-bearing turntable and the measuring mechanism (3) and combining the measuring components.

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