Rotor-stator axial dimension measuring device and control method, engine assembly method

Abstract

This invention provides a device for measuring the axial dimension of a rotor-stator, a method for controlling the axial dimension of a rotor-stator, and an engine assembly method. The engine assembly method includes a method for controlling the axial dimension of a rotor-stator. This method includes: assembling an intermediate housing and a central transmission gearbox into a component assembly; driving a drive bevel gear to move in a first direction to a first limit position; and measuring a first value L of the axial dimension. S1 Drive the active bevel gear to move in the second direction to the second limit position, and measure the second axial dimension L. S2 ; Calculate the thickness T of the adjustment shim C =L S -(L S1 +L S2 ) / 2, where L S This refers to the design value for the axial dimension. In the rotor-stator axial dimension measuring device: the axial force loading fixture is used to apply an axial force toward the driving bevel gear in a first direction or a second direction, so that it moves to the first limit position or the second limit position; the dimensional gauge is used to measure the axial dimension.

Description

Technical Field

[0001] This invention relates to the field of aero-engine assembly technology, specifically to a rotor-stator axial dimension measuring device, a rotor-stator axial dimension control method, and an engine assembly method. Background Technology

[0002] Aero engines have complex structures, numerous and varied parts, high precision in parts manufacturing, and extremely difficult assembly of components and the entire engine. The docking and assembly of the engine core unit is a critical step, directly determining the working quality and operational safety of the high-pressure rotor system. The core engine, in a dual-shaft or multi-shaft engine, mainly consists of a high-pressure compressor, combustion chamber, and high-pressure turbine; its structure is equivalent to that of a single-rotor engine.

[0003] To ensure that the high-pressure rotor and stator of the aero-engine do not collide, and to keep the axial dimensions of the rotor and stator as close as possible to the theoretical center position of the design dimensions to ensure the working efficiency of the compressor, it is necessary to control the axial assembly dimensions of the rotor and stator, including the axial distance from the front positioning surface of the compressor stator casing to the front journal positioning surface of the compressor rotor shaft.

[0004] Currently, the axial dimensions of the compressor rotor and stator are corrected by installing an adjusting shim between the compressor rotor shaft and the central drive gearbox. To calculate the required shim thickness, the current process involves measuring the relevant axial dimensions of the intermediate casing and the central drive gearbox before assembly, and then using a complex dimensional chain to calculate the axial distance between the axial positioning surfaces of the high-pressure compressor rotor and stator after assembly, as well as the thickness of the adjusting shim. This method has a long axial assembly dimension control dimensional chain, a large amount of dimensional data, a heavy workload in measurement and calculation, long processing time, and low assembly efficiency. Furthermore, it is affected by the bearing clearance of the third support bearing, with different calculation formulas under different measurement conditions, which can easily lead to confusion and potential assembly quality issues.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0006] One object of the present invention is to provide a rotor-stator axial dimension measuring device that can improve the efficiency and accuracy of rotor-stator axial dimension measurement.

[0007] A rotor-stator axial dimension measuring device for achieving the aforementioned purpose is used to measure the axial dimension of the rotor-stator of an engine. The engine includes an intermediate housing, a central drive gearbox, and a compressor rotor shaft. The intermediate housing includes a rear locating surface, the compressor rotor shaft includes a front journal locating surface, and the central drive gearbox includes a drive bevel gear. The rotor-stator axial dimension measuring device includes a component assembly, an axial force loading fixture, and a dimensional measuring tool. The component assembly is formed by assembling the intermediate housing and the central drive gearbox. The axial force loading fixture is used to apply an axial force towards a first direction or a second direction to the drive bevel gear, so that the drive bevel gear moves to a first limit position or a second limit position, wherein the first direction is opposite to the second direction. The dimensional measuring tool is used to measure the axial distance between the rear locating surface and the front journal locating surface in the component assembly.

[0008] In one or more embodiments of the rotor-stator axial dimension measuring device, the rotor-stator axial dimension measuring device further includes a force measuring device for measuring the axial force.

[0009] In one or more embodiments of the aforementioned rotor-stator axial dimension measuring device, the force measuring device is a push-pull force gauge.

[0010] In one or more embodiments of the aforementioned rotor-stator axial dimension measuring device, the intermediate housing includes a front mounting edge with a connecting hole, the driving bevel gear includes an axially extending threaded section, and the axial force loading fixture includes a support frame, a connecting portion, and an adapter ring. The support frame is used to connect to the connecting hole, and the adapter ring is used to connect to the threaded section. The adapter ring is axially movable to the support frame via the connecting portion.

[0011] In one or more embodiments of the rotor-stator axial dimension measuring device, the connecting portion includes a screw that extends axially along the adapter ring and is threadedly connected to the support frame.

[0012] This rotor-stator axial dimension measuring device assembles the intermediate housing and central transmission gearbox into a component assembly. By applying axial force to the tooling to push / pull the driving bevel gear to its limit position, the axial dimension between the rotor-stator axial positioning surfaces can be conveniently measured. This eliminates the need to measure the axial dimension before assembly, and the measurement can be achieved using a general-purpose handheld measuring tool, without the need for a coordinate measuring machine or other complex measuring equipment. It is simple to operate and easy to implement, improving the efficiency and accuracy of rotor-stator axial dimension measurement. This allows for precise control of the rotor-stator axial assembly dimensions, improving engine assembly efficiency and quality. It has broad application value and can be used in the assembly and manufacturing processes of military and civilian aircraft engines, ground gas turbines, etc.

[0013] Another objective of this invention is to provide a method for controlling the axial dimensions of a rotor-stator, which can precisely control the axial assembly dimensions of the rotor-stator.

[0014] A method for controlling the axial dimension of a rotor-stator to achieve the aforementioned objective is provided for controlling the axial dimension of the rotor-stator of an engine. The engine includes an intermediate housing, a central drive gearbox, and a compressor rotor shaft. The central drive gearbox includes a drive bevel gear. The axial dimension is the axial distance between the rear locating surface of the intermediate housing and the front journal locating surface of the compressor rotor shaft. An adjusting shim is provided between the central drive gearbox and the compressor rotor shaft. The method for controlling the axial dimension of the rotor-stator includes the following steps: assembling the intermediate housing and the central drive gearbox into a component assembly; driving the drive bevel gear to move in a first direction to a first limit position; and measuring a first measured value L of the axial dimension. S1 The first direction is parallel to the axial direction of the component assembly; the driving bevel gear is driven to move in the second direction to the second limit position, and the second measurement value L of the axial dimension is measured. S2 The second direction is opposite to the first direction; calculate the thickness T of the adjustment pad. C =L S -(L S1 +L S2 ) / 2, where L S This refers to the design value of the axial dimension.

[0015] In one or more embodiments of the described rotor-stator axial dimension control method, the method further includes applying an axial force to the drive bevel gear by setting an axial force loading fixture, and measuring the axial force by setting a force measuring device.

[0016] In one or more embodiments of the rotor-stator axial dimension control method, the method further includes measuring the first measured value L when the axial force measured by the force measuring device is not less than 350 N·m and not greater than 500 N·m. S1 Or the second measured value L S2 .

[0017] In one or more embodiments of the aforementioned rotor-stator axial dimension control method, it further includes controlling the thickness T. C The adjusting shim is ground down, or a shim of thickness T is selected from a series of adjusting shims of different thicknesses. C The adjusting pad, or a set of adjusting pads selected from a series of adjusting pads of different thicknesses, wherein the sum of the thicknesses of the set of adjusting pads is T. C .

[0018] This method for controlling the axial dimensions of the rotor-stator breaks through the current complex dimensional chain calculation and measurement methods. It designs a more optimized and simpler method, significantly shortening the length of the dimensional chain, reducing the measurement and transcription of multiple dimensions, decreasing the workload of measurement and calculation, greatly reducing the impact of measurement errors, and lowering the difficulty of dimensional calculation. It eliminates the need to use different calculation formulas depending on the measurement state, avoiding errors caused by operator confusion in calculation methods, reducing risk factors, and enabling more precise control of the axial assembly dimensions of the rotor-stator. This innovative method proposes that, in the assembly state of the intermediate casing and the central transmission gearbox, the axial dimension between the rotor-stator axial positioning surfaces is directly measured by pushing / pulling the driving bevel gear to its limit position. This eliminates the need to measure the axial dimension before assembly, and can be achieved using a common handheld measuring tool, without the need for a coordinate measuring machine or other complex measuring equipment. The operation is simple and easy to implement. This method can greatly improve the assembly efficiency and quality of engines, and has broad application value. It can be applied to the assembly and manufacturing processes of military and civilian aircraft engines, ground gas turbines, etc.

[0019] Another objective of this invention is to provide an engine assembly method that can improve engine assembly efficiency and assembly quality.

[0020] An engine assembly method for achieving the aforementioned objective includes the aforementioned method for controlling the axial dimensions of the rotor and stator.

[0021] The engine assembly method uses the aforementioned rotor-stator axial dimension control method to control the rotor-stator axial dimension, which can greatly improve the engine assembly efficiency and assembly quality. It has broad application value and can be applied to the assembly and manufacturing process of military and civil aviation engines, ground gas turbines, etc. Attached Figure Description

[0022] The above and other features, properties, and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments. It should be noted that the drawings are merely illustrative and are not drawn to scale, and should not be construed as limiting the actual scope of protection claimed by the present invention. Furthermore, components having similar related characteristics or features may have the same or similar reference numerals.

[0023] Figure 1 A schematic diagram of a dimensional control chain based on a comparative axial dimension is shown.

[0024] Figure 2 A schematic diagram of a rotor-stator axial dimension measuring device and an axial dimension control dimensional chain according to one embodiment is shown. Detailed Implementation

[0025] The following discloses various implementation methods or embodiments of the described subject matter. To simplify the disclosure, specific examples of the elements and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of protection of the present invention. Furthermore, certain features, structures, or characteristics in one or more embodiments of this application can be appropriately combined.

[0026] Reference Figure 1 and Figure 2 The compressor 10 at the front end of the core engine 1 of a certain type of aero-engine includes a compressor stator casing 11, a compressor rotor shaft 12, a central transmission gearbox 13, and an intermediate casing 14. In the description of this specification, the directional term "front" refers to the direction toward the engine inlet, and the directional term "rear" refers to the direction toward the engine nozzle.

[0027] The intermediate housing 14 includes a rear mounting edge 141 and an intermediate mounting edge 143. The rear mounting edge 141 is connected to the front mounting edge 111 of the compressor stator housing 11, and the rear positioning surface 142 of the rear mounting edge 141 is in contact with the front positioning surface 112 of the front mounting edge 111. The intermediate mounting edge 143 is connected to the stator component 131 of the central transmission gearbox 13, and the intermediate positioning surface 144 of the intermediate mounting edge 143 is in contact with the first positioning surface 132 of the stator component 131.

[0028] The central drive gearbox 13 houses a drive bevel gear 133 and a third pivot bearing 15. The gear shaft 136 of the drive bevel gear 133 extends axially along the compressor 10 and is fixedly connected to the inner ring of the third pivot bearing 15. The outer ring of the third pivot bearing 15 is fixedly connected to the stator component 131. A rotor component 137 is also connected to the gear shaft 136, and the second locating surface 134 of the rotor component 137 is opposite to the front journal locating surface 121 of the compressor rotor shaft 12. The third pivot bearing 15 is a high-pressure rotor front bearing, a ball bearing, which bears the axial and radial loads of the rotor. The axial dimensions of the compressor 10's rotor and stator are affected by the bearing clearance of the third pivot bearing 15.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Furthermore, when the first element is described as being connected or combined with the second element, this description includes embodiments where the first and second elements are directly connected or combined with each other, as well as embodiments where one or more other intervening elements are added to indirectly connect or combine the first and second elements with each other. Those skilled in the art will understand the specific meaning of the above terms in this invention through the specific circumstances.

[0030] To ensure that the high-pressure rotor and stator do not collide after assembly and during operation, and to keep the axial dimensions of the rotor and stator as close as possible to the theoretical center position of the design dimensions to ensure the working efficiency of the compressor 10, the axial assembly dimensions of the rotor and stator need to be controlled, including the first axial dimension 100. The first axial dimension 100 is the axial distance from the front locating surface 112 of the compressor stator casing 11 to the front journal locating surface 121 of the compressor rotor shaft 12, which is also the axial distance from the rear locating surface 142 of the intermediate casing 14 to the front journal locating surface 121 of the compressor rotor shaft 12. The design value of the first axial dimension 100 is L. S The design value L S This is the value of the first axial dimension 100 when the third fulcrum bearing 15 is in the middle position.

[0031] By setting an adjusting shim (not shown) between the front journal locating surface 121 of the compressor rotor shaft 12 and the second locating surface 134 of the central transmission gearbox 13, the actual assembly dimensions can be corrected so that the first axial dimension 100 is controlled as close as possible to the design value L. S The theoretical center position.

[0032] exist Figure 1 In the comparative examples shown, the required thickness T of the adjustment shim is calculated. C Before assembly, the relevant axial dimensions of the intermediate housing 14 and the central transmission gearbox 13 were measured respectively. Then, the axial distance between the axial positioning surfaces of the high-pressure rotor and stator after assembly and the thickness T of the adjusting shim were calculated through a complex dimensional chain. C The specific operating steps are as follows:

[0033] I. Measure the axial distance H4 between the intermediate positioning surface 144 and the rear positioning surface 142 on the intermediate housing 14;

[0034] II. Support the central transmission gearbox 13 vertically so that the driving bevel gear 133 sinks and presses the third fulcrum bearing 15 by gravity, so that the third fulcrum bearing 15 is in the extreme position, and measure the distance H3 from the first positioning surface 132 to the second positioning surface 134 of the central transmission gearbox 13.

[0035] III. Obtain the axial clearance ZY3 of the third fulcrum bearing 15 by consulting the quality certification documents;

[0036] IV. Using Formula T C =L S -(H3+ZY3 / 2-H4) or T C =L S -(H3-ZY3 / 2-H4) Calculate the required thickness T of the adjustment shim. C ;

[0037] V. Adjust and grind the shim to achieve the thickness of T. C ±0.01.

[0038] The measurement of H3 involves two states: pushing forward and pulling backward. When the front end of the central transmission gearbox 13 in step II is facing downward, the driving bevel gear 133 and the third fulcrum bearing 15 are in the pushing forward state. In step III, formula T is used. C =L S The calculation is performed using -(H3+ZY3 / 2-H4); when the rear end of the central transmission gearbox 13 in step II is facing downwards, the driving bevel gear 133 and the third fulcrum bearing 15 are in a pulled-back state, and formula T is used in step III. C =L S The calculation is performed using -(H3-ZY3 / 2-H4).

[0039] The axial assembly dimension control chain of this comparative model is relatively long, with a large amount of dimensional data, resulting in a large workload for measurement and calculation, long working hours, and low assembly efficiency. In particular, the measurement value of H3 involves two states: pushing forward and pulling backward. When using the measurement values ​​under different states for calculation, the calculation formula is fundamentally different. On-site workers are very likely to confuse these differences during the measurement and assembly process, which may lead to potential assembly quality problems. Furthermore, relying solely on gravity to bring the third fulcrum bearing 15 to its limit position has poor reliability and may cause errors in the measurement results.

[0040] Reference Figure 2 A method for controlling the axial dimension of a rotor-stator according to one or more embodiments of the present invention is used to control the first axial dimension 100 of the aforementioned aero-engine, comprising the following steps:

[0041] S1. Assemble the intermediate housing 14 and the central transmission gearbox 13 into a component assembly 20;

[0042] S2. Drive the active bevel gear 133 to move in the first direction to the first limit position, and measure the first measurement value L of the first axial dimension 100. S1 The first direction is parallel to the axial direction of the component assembly 20;

[0043] S3. Drive the active bevel gear 133 to move in the second direction to the second limit position, and measure the second measurement value L of the first axial dimension 100. S2 The second direction is opposite to the first direction;

[0044] S4. Calculate the required thickness T of the adjustment shim. C =L S -(L S1 +L S2 ) / 2;

[0045] S5. Grind and adjust the shim to achieve the thickness of T. C±0.01, or select a thickness T from a series of adjustment pads of different thicknesses. C The adjustment shims, or a set of adjustment shims of different thicknesses selected from a series of adjustment shims, the sum of the thicknesses of the set of adjustment shims being T. C ;

[0046] S6. Assemble the compressor stator casing 11, compressor rotor shaft 12, and component assembly 20 together, with a thickness of T. C The sum of the adjustment pads or thicknesses is T. C A set of adjusting pads is installed between the front journal positioning surface 121 of the compressor rotor shaft 12 and the second positioning surface 134 of the central transmission gearbox 13.

[0047] One of the first and second extreme positions is the forward pushing position, and the other is the backward pulling position. Further, based on the first measured value L... S1 Second measured value L S2 Additional calculations can be performed to verify the axial clearance of the third support bearing 15, i.e., ZY3 = |L S1 -L S2 |

[0048] This method for controlling the axial dimensions of the rotor-stator breaks through the current complex dimensional chain calculation and measurement methods. It designs a more optimized and simpler method, significantly shortening the length of the dimensional chain, reducing the measurement and transcription of multiple dimensions, decreasing the workload of measurement and calculation, greatly reducing the impact of measurement errors, and lowering the difficulty of dimensional calculation. It eliminates the need to use different calculation formulas depending on the measurement state, avoiding errors caused by operator confusion in calculation methods, reducing risk factors, and enabling more precise control of the axial assembly dimensions of the rotor-stator. This innovative method proposes that, in the assembled state of the intermediate housing 14 and the central transmission gearbox 13, the axial dimension between the rotor-stator axial positioning surfaces can be directly measured by pushing / pulling the driving bevel gear 133 to its limit position. This eliminates the need to measure the axial dimension before assembly, and can be achieved using a common handheld measuring tool, without the need for a coordinate measuring machine or other complex measuring equipment. The operation is simple and easy to implement. This method can greatly improve the assembly efficiency and quality of engines, and has broad application value. It can be applied to the assembly and manufacturing processes of military and civilian aircraft engines, ground gas turbines, etc.

[0049] The engine assembly method according to one or more embodiments of the present invention uses the aforementioned rotor-stator axial dimension control method to control the rotor-stator axial dimension, which can greatly improve the engine assembly efficiency and assembly quality, and has broad application value. It can be applied to the assembly and manufacturing process of military and civil aircraft engines, ground gas turbines, etc.

[0050] According to one embodiment of the present invention, the rotor-stator axial dimension measuring device 2 is used to measure the aforementioned first measurement value L. S1 Second measured value L S2 The rotor-stator axial dimension measuring device 2 includes the aforementioned component assembly 20, axial force loading fixture 21, force measuring device 22, and dimensional measuring tool (not shown).

[0051] The axial force loading fixture 21 is used to apply an axial force toward the aforementioned first or second direction to the drive bevel gear 133 of the component assembly 20 to facilitate operation.

[0052] The force measuring device 22 is used to measure the axial force applied to the drive bevel gear 133 by the axial force loading fixture 21. For example, the force measuring device 22 is a push-pull force gauge, which is a commonly used measuring tool in the workshop, easy to obtain and convenient to operate.

[0053] Dimensioning tools are used to measure the actual value of the first axial dimension 100 in the component assembly 20. For example, the dimensional measuring tool is a straightedge, depth gauge, or other general-purpose handheld measuring tool, which is easy to operate and has a low cost.

[0054] Optionally, in steps S2 and S3 above, the readings of the force measuring device 22 are observed. When the axial force applied to the driving bevel gear 133 by the axial force loading fixture 21 is not less than 350 N·m and not greater than 500 N·m, the loading can be stopped, and the first measurement value L can be measured. S1 Or the second measured value L S2 The measurement allows for quick determination of when the limit position is reached, making operation convenient and reliable. Based on the inventor's calculations and the results of multiple experiments, when the axial force is within the range of 350 N·m to 500 N·m, it ensures that the drive bevel gear 133 and the third fulcrum bearing 15 reach their limit positions, while preventing excessive axial force from damaging components.

[0055] In another embodiment, during the process of driving the active bevel gear 133 to move by the axial force loading fixture 21, the first axial dimension 100 is measured multiple times by a dimensional measuring tool. When the values ​​of the first axial dimension 100 measured several times are the same, it can be determined that the active bevel gear 133 and the third fulcrum bearing 15 have reached their limit positions, so it is not necessary to set up the force measuring device 22.

[0056] Continue to refer to Figure 2The intermediate housing 14 also includes a front mounting edge 145, which has a connecting hole 146 for assembling with components at the front end of the intermediate housing 14. The front end of the drive bevel gear 133 includes a threaded section 135 extending axially. The axial force loading fixture 21 includes a support frame 211, a connecting part 212, and an adapter ring 213. The support frame 211 is connected to the connecting hole 146 by a fastener 217, and the adapter ring 213 is threadedly connected to the threaded section 135. This allows for the full utilization of the existing structure on the intermediate housing 14 and the central transmission gearbox 13 to connect the axial force loading fixture 21 to the component assembly 20 without altering the structure of the intermediate housing 14 and the central transmission gearbox 13. The structure is simple, the operation is convenient, and the connection is reliable.

[0057] The adapter ring 213 is axially movable to the support frame 211 via the connecting part 212 to drive the drive bevel gear 133 to move axially relative to the intermediate housing 14. Optionally, the connecting part 212 includes an operating handle 214 or handwheel, a screw 215, and a connecting assembly 216. The screw 215 is connected to the operating handle 214 or handwheel. The screw 215 extends axially along the adapter ring 213 and is threadedly connected to the support frame 211. The connecting assembly 216 connects the screw 215, the adapter ring 213, and the force measuring device 22. By rotating the operating handle 214 or handwheel, the screw 215 can be driven to rotate, thereby driving the adapter ring 213 and the drive bevel gear 133 to move axially. The structure is simple and the operation is convenient.

[0058] The rotor-stator axial dimension measuring device 2 assembles the intermediate housing 14 and the central transmission gearbox 13 into a component assembly 20. By using the axial force loading fixture 21 to push / pull the driving bevel gear 133 to its limit position, the axial dimension between the rotor-stator axial positioning surfaces can be conveniently measured. There is no need to measure the axial dimension before assembly, and the axial dimension can be measured using a general handheld measuring tool without the need for a coordinate measuring machine or other complex measuring equipment. It is simple to operate and easy to implement, which can improve the efficiency and accuracy of rotor-stator axial dimension measurement, thereby accurately controlling the rotor-stator axial assembly dimensions, improving the assembly efficiency and quality of the engine, and has broad application value. It can be applied to the assembly and manufacturing process of military and civil aviation engines, ground gas turbines, etc.

[0059] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any variations and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the invention, fall within the protection scope defined by the claims of the present invention.

Claims

1. A rotor-stator axial dimension measuring device, used to measure the axial dimension of the rotor-stator of an engine, the engine including an intermediate housing, a central drive gearbox, and a compressor rotor shaft, the intermediate housing including a rear locating surface, the compressor rotor shaft including a front journal locating surface, and the central drive gearbox including a drive bevel gear, characterized in that, The rotor-stator axial dimension measuring device includes: The component assembly is formed by assembling the intermediate housing and the central transmission gearbox; An axial force loading fixture is used to apply an axial force toward a first direction or a second direction to the driving bevel gear, so that the driving bevel gear moves to a first limit position or a second limit position, wherein the first direction is opposite to the second direction; A dimensional measuring tool is used to measure the axial distance between the rear locating surface and the front journal locating surface in the component assembly.

2. The rotor-stator axial dimension measuring device as described in claim 1, characterized in that, The rotor-stator axial dimension measuring device also includes a force measuring device, which is used to measure the axial force.

3. The rotor-stator axial dimension measuring device as described in claim 2, characterized in that, The force measuring device is a push-pull force gauge.

4. The rotor-stator axial dimension measuring device as described in any one of claims 1 to 3, characterized in that, The intermediate housing includes a front mounting edge with a connecting hole. The drive bevel gear includes a threaded section extending axially. The axial force loading fixture includes a support frame, a connecting part, and an adapter ring. The support frame is used to connect to the connecting hole, and the adapter ring is used to connect to the threaded section. The adapter ring is axially movable to the support frame through the connecting part.

5. The rotor-stator axial dimension measuring device as described in claim 4, characterized in that, The connecting part includes a screw that extends axially along the adapter ring and is threadedly connected to the support frame.

6. A method for controlling the axial dimension of a rotor-stator, used to control the axial dimension of the rotor-stator of an engine, the engine including an intermediate housing, a central drive gearbox, and a compressor rotor shaft, the central drive gearbox including a driving bevel gear, the axial dimension being the axial distance between the rear positioning surface of the intermediate housing and the front journal positioning surface of the compressor rotor shaft, an adjusting shim being provided between the central drive gearbox and the compressor rotor shaft, characterized in that... The method for controlling the axial dimension of the rotor-stator includes the following steps: The intermediate housing and the central transmission gearbox are assembled into a component assembly; Drive the drive bevel gear to move in the first direction to the first limit position, and measure the first value L of the axial dimension. S1 The first direction is parallel to the axial direction of the component assembly; Drive the drive bevel gear to move in the second direction to the second limit position, and measure the second value L of the axial dimension. S2 The second direction is opposite to the first direction; Calculate the thickness T of the adjustment pad. C =L S -(L S1 +L S2 ) / 2, where L S This refers to the design value of the axial dimension.

7. The method for controlling the axial dimension of a rotor-stator as described in claim 6, characterized in that, It also includes setting an axial force loading fixture to apply an axial force to the drive bevel gear, and measuring the axial force by setting a force measuring device.

8. The method for controlling the axial dimension of a rotor-stator as described in claim 7, characterized in that, It also includes taking the first measured value L when the axial force measured by the force measuring device is not less than 350 N·m and not greater than 500 N·m. S1 Or the second measured value L S2 .

9. The method for controlling the axial dimension of a rotor-stator as described in any one of claims 6 to 8, characterized in that, It also includes based on thickness T C The adjusting shim is ground down, or a shim of thickness T is selected from a series of adjusting shims of different thicknesses. C The adjusting pad, or a set of adjusting pads selected from a series of adjusting pads of different thicknesses, wherein the sum of the thicknesses of the set of adjusting pads is T. C .

10. An engine assembly method, characterized in that, Including the method for controlling the axial dimensions of a rotor-stator as described in any one of claims 6 to 9.

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