Engine rotor runout measuring method and measuring system based on robot assembly

Abstract

The invention relates to an engine rotor runout measuring method and system based on a robot assembly. The engine rotor runout measuring system comprises a robot assembly which comprises a robot, a measuring part and a control system, the measuring part is arranged on the robot, and the control system controls the robot to move; the to-be-tested complete machine structure comprises an inlet channel and target positions corresponding to the inlet channel, the inlet channel comprises holes and / or pipelines communicated with the outside of the to-be-tested complete machine structure, and the target positions comprise a high-pressure rotor target group and a low-pressure rotor target group; wherein the control system controls the robot to carry the measuring part to enter the whole machine structure to be measured from the entering channel so as to reach a target position for measurement. And rotor run-out measurement in a complete machine state is realized.

Description

Technical Field

[0001] The technical field of this invention relates to a method and system for measuring engine rotor runout based on robot components. Background Technology

[0002] Assembly technology is directly related to engine performance, safety, reliability, and stability. The internal cavity of an aero-engine in its complete state is a blind cavity, with rotor-stator coupling and high-low pressure coupling, resulting in extremely poor accessibility and visibility. Measurement and inspection methods are limited, and it is currently impossible to measure the rotor runout of an engine in its complete state. It is necessary to disassemble the engine into individual units for inspection, which is a complex, time-consuming, and labor-intensive process.

[0003] There is currently no effective evaluation method for the overall assembly quality, and a complete closed-loop control for assembly quality has not been established. Summary of the Invention

[0004] The purpose of this invention is to provide an engine rotor runout measurement system.

[0005] Another object of the present invention is to provide a method for measuring rotor runout based on robot components.

[0006] According to one aspect of the present invention, an engine rotor runout measurement system includes: a robot assembly comprising a robot, a measuring unit, and a control system, wherein the measuring unit is disposed on the robot, and the control system controls the movement of the robot; a complete machine structure to be tested, including an entry channel and a target position corresponding to the entry channel, the entry channel including a hole and / or a pipe communicating with the outside of the complete machine structure to be tested, and the target position including a high-pressure rotor target group and a low-pressure rotor target group; wherein the control system controls the robot to carry the measuring unit from the entry channel into the interior of the complete machine structure to be tested, so as to reach the target position for measurement.

[0007] The technical solution of this application allows for measurement of different target positions via robotic components without requiring disassembly of the unit. This enables measurement of high and low voltage rotor runout in the overall machine state, facilitating advance analysis and reducing unnecessary disassembly work. It also allows for assembly inspection and line maintenance after assembly, reducing overhaul disassembly and saving time and labor costs. Furthermore, using robots for measurement requires less experience from technicians, offers higher measurement stability and reliability, and is faster.

[0008] In one or more embodiments of the engine rotor runout measurement system, the robot has a length of less than or equal to 30 mm, a width of less than or equal to 7 mm, and a height of less than or equal to 7 mm.

[0009] In one or more embodiments of the engine rotor runout measurement system, the robot's maximum crawling speed is 5 times its body length and its minimum turning radius is 30 mm.

[0010] In one or more embodiments of the engine rotor runout measurement system, the robot has a load capacity greater than 5g.

[0011] In one or more embodiments of the engine rotor runout measurement system, the measuring unit includes a sensor whose diameter is smaller than the width of the robot.

[0012] In one or more embodiments of the engine rotor runout measurement system, the control system includes a remote controller that is operated to control the robot to move to the target position.

[0013] In one or more embodiments of the engine rotor runout measurement system, the control system includes a readable storage medium and a processor. The readable storage medium stores a route program, the execution content of which includes a movement route of the robot from the entry channel to the corresponding target position. The processor executes the route program to control the robot to move along the movement route.

[0014] In one or more embodiments of the engine rotor runout measurement system, the high-pressure rotor target group includes an upstream target, a midstream target, and a downstream target. The upstream target includes a front grate clamping nut at the front end of the high-pressure compressor rotor. The midstream target includes the high-pressure compressor rotor blade tip and the high-pressure compressor rotor disk cavity. The downstream target includes the high-pressure turbine rotor blade tip and the interstage casing four-point bearing cavity. The entry channel corresponding to the front grate clamping nut at the front end of the high-pressure compressor rotor includes an intermediate casing ventilation pipe. The entry channel corresponding to the high-pressure compressor rotor blade tip includes a high-pressure compressor borehole. The entry channel corresponding to the high-pressure compressor rotor disk cavity includes an extension casing lead hole. The entry channel corresponding to the high-pressure turbine rotor blade tip includes a high-pressure turbine borehole. The entry channel corresponding to the interstage casing four-point bearing cavity includes an interstage casing oil drain pipe.

[0015] In one or more embodiments of the engine rotor runout measurement system, the low-pressure rotor target group includes a fan shaft and a low-pressure turbine rotor disk cavity, the inlet channel corresponding to the fan shaft includes a low-pressure compressor rotor speed measurement hole, and the inlet channel corresponding to the low-pressure turbine rotor disk cavity includes a turbine rear casing oil return pipe.

[0016] According to another aspect of the present invention, a rotor runout measurement method based on a robot component employs a robot component of the rotor runout measurement system as described in any of the above claims, comprising: a robot of the robot component entering the interior of the machine structure under test through an entry channel; a control system of the robot component controlling the robot to reach a target position corresponding to the entry channel; adjusting the posture of the measuring unit of the robot component to perform measurement; wherein, the entry channel includes a hole and / or pipe communicating with the outside of the machine structure under test, and the target position includes a high-pressure rotor target group and a low-pressure rotor target group. Attached Figure Description

[0017] 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, in which the same reference numerals always denote the same features. It should be noted that these drawings are merely illustrative and are not drawn to scale, and should not be construed as limiting the scope of protection actually claimed by the present invention, wherein:

[0018] Figure 1 This is a schematic diagram of the structure of a robot component according to one embodiment.

[0019] Figure 2 This is a schematic diagram of the structure of a control system according to one embodiment.

[0020] Figure 3 This is a schematic diagram of the upstream target and its corresponding entry channel in one embodiment.

[0021] Figure 4A This is a schematic diagram of the structure of the entry channel for a midstream target in one embodiment.

[0022] Figure 4B for Figure 4A The diagram shows the structure of the midstream target corresponding to the entry channel.

[0023] Figure 5 This is a schematic diagram of the midstream target and its corresponding entry channel in another embodiment.

[0024] Figure 6A This is a schematic diagram of the structure of the entry channel for a downstream target in one embodiment;

[0025] Figure 6B for Figure 6A The diagram shows the structure of the downstream target corresponding to the entry channel.

[0026] Figure 7 A schematic diagram of the downstream target and corresponding entry channel in another embodiment;

[0027] Figure 8This is a schematic diagram of the fan shaft and corresponding inlet channel of a low-pressure rotor target assembly according to an embodiment.

[0028] Figure 9 This is a schematic diagram of the low-pressure turbine rotor disk cavity and corresponding entry channel of a low-pressure rotor target group according to an embodiment.

[0029] Figure 10 This is a schematic flowchart of an embodiment of an endoscope-based rotor runout measurement method.

[0030] Figure label:

[0031] 1000-Engine rotor runout measurement system;

[0032] 100 - Robot components;

[0033] 1-Measuring Department;

[0034] 10-Sensors;

[0035] 20-Robot;

[0036] 21-Control System;

[0037] 101 - Remote Control;

[0038] 102 - Readable storage medium; 103 - Processor;

[0039] 104 - Display system; 105 - Data acquisition system;

[0040] 200 - Enter the channel;

[0041] 3-hole;

[0042] 31 - High-pressure compressor borehole probe;

[0043] 32-High-pressure turbine borehole probe;

[0044] 33 - Low-pressure compressor rotor speed measuring hole;

[0045] 4-Pipelines;

[0046] 41-Intermediate casing ventilation pipe;

[0047] 42-Interstage casing oil drain pipe;

[0048] 300 - Target location;

[0049] 51-Pressure nut for front gear teeth at the front end of the high-pressure compressor rotor;

[0050] 52 - High-pressure compressor rotor blade tip;

[0051] 53 - High-pressure compressor rotor disk cavity;

[0052] 54 - High-pressure turbine rotor blade tip;

[0053] 55-stage inter-stage casing four-point bearing cavity;

[0054] 56-Fan shaft;

[0055] 57 - Low-pressure turbine rotor disk cavity;

[0056] 400 - Endoscopic-based method for measuring rotor runout. Detailed Implementation

[0057] Reference will now be made in detail to various embodiments of the invention, examples of which are shown in the accompanying drawings and described below. Although the invention will be described in conjunction with exemplary embodiments, it should be understood that this specification is not intended to limit the invention to those exemplary embodiments. Rather, the invention is intended to cover not only these exemplary embodiments, but also various alternatives, modifications, equivalents, and other embodiments that may be included within the spirit and scope of the invention as defined by the appended claims.

[0058] Furthermore, this application uses specific terms to describe its embodiments. For example, "an embodiment" and / or "one embodiment" refers to a particular feature, structure, or characteristic associated with at least one embodiment of this application. Therefore, it should be emphasized and noted that "an embodiment" or "one embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application can be appropriately combined.

[0059] Flowcharts are used in this application to illustrate the operations performed by the system according to embodiments of this application. It should be understood that the preceding or following operations are not necessarily performed in exact order. Other operations may be added to these processes, or one or more operations may be removed from these processes.

[0060] In one comparative approach, an endoscope was used to measure the rotor runout of the engine in its entirety. However, the operation of the endoscope requires a high level of experience from the technicians. The technicians need to have a thorough understanding of the engine structure and be very skilled in inserting the endoscope. Otherwise, the measurement will be inaccurate or even fail. In addition, the process is time-consuming and labor-intensive.

[0061] Based on the above considerations, the inventors, after in-depth research, designed an engine rotor runout measurement system. This system allows for measurement of different target positions using robotic components without requiring disassembly of the unit. It enables measurement of high and low pressure rotor runout in the entire engine state, facilitating advance analysis and reducing unnecessary disassembly work. It also allows for assembly inspection and line maintenance after assembly, reducing overhaul disassembly and saving time and labor costs. Furthermore, using robots for measurement requires less experience from technicians, offers higher measurement stability and reliability, and is faster.

[0062] refer to Figure 1 As shown in the figure, in one embodiment, the specific structure of the engine rotor runout measurement system 1000 may include a robot assembly 100 and a complete engine structure under test. "Complete engine structure under test" means that, relative to disassembling the engine into unit parts for repair, the engine is repaired directly as a whole without disassembly. The robot assembly 100 includes a measuring unit 1, a robot 20, and a control system 21. The measuring unit 1 is disposed on the robot 20, and the control system 21 controls the movement of the robot 20. The complete engine structure under test includes an entry channel 200 and a target position 300 corresponding to the entry channel 200. The entry channel 200 includes a hole 3 and / or a pipe 4 communicating with the outside of the complete engine structure under test. "A hole 3 and / or a pipe 4 communicating with the outside of the complete engine structure under test" means that the hole 3 or pipe 4 allows access from the outside of the complete engine structure under test to the inside of the complete engine structure under test. The target position 300 includes a high-pressure rotor target group and a low-pressure rotor target group. The control system 21 controls the robot 20 to carry the measuring unit 1 through the entry channel 200 into the interior of the machine structure to be measured, so as to reach the target position 300 for measurement.

[0063] The advantages of this embodiment are that it allows for measurement of different target positions via robotic components without requiring disassembly of the unit, enabling measurement of high and low voltage rotor runout in the overall machine state. This facilitates advance analysis and research, reduces unnecessary disassembly work, and allows for assembly inspection and line maintenance after assembly, minimizing overhaul disassembly and saving time and labor costs. Furthermore, using robots for measurement requires less experience from technicians, offers higher measurement stability and reliability, and is less time-consuming.

[0064] In one embodiment, such as Figure 1 , Figure 2 As shown, the length of robot 20 is no greater than 30mm, and the width and height of robot 20 are both no greater than 7mm. The robot has a load capacity greater than 5g to carry the measuring unit 1 into the interior of the structure under test for measurement. The measuring unit 1 includes a sensor 10, the diameter of which is smaller than the width of robot 20. The sensor 10 can be as follows: Figure 1The capacitive sensor shown has a diameter no greater than 6mm and a wire diameter no greater than 3mm. Sensor 10 can also be a fiber optic sensor. The robot and its carrying measuring unit are small in size, facilitating measurement at the target location. The robot's maximum crawling speed is 5 times its body length, i.e., 150mm / s, and its minimum turning radius is 30mm. It has a relatively fast movement speed and good maneuverability, enabling it to move along straight lines, circular arcs, and other trajectories.

[0065] The robot component 100 also includes a lighting and camera system and a display system 104. The lighting and camera system is installed on the robot 20 and outputs the image in front of the measuring unit 1 to the display system 104 for technicians to observe.

[0066] In one embodiment, such as Figure 1 As shown, the control system 21 includes a remote controller 101, which is operated by a technician to control the robot 20 carrying the measuring unit to move to the target position 300. The remote controller 101 is operated through the display system 104 to adjust and position the measuring unit 1 to perform measurements. The robot assembly 100 also includes a data acquisition system 105, which collects and analyzes the rotor runout values ​​measured by the measuring unit 1.

[0067] like Figure 2 As shown, the control system 21 also includes a readable storage medium 102 and a processor 103. The readable storage medium 102 stores a route program. The execution content of the route program includes the movement route of the robot from the entry channel to the corresponding target position. The processor 103 executes the route program to control the robot to move along the movement route. In this way, the robot components can be intelligently and automatically implemented to measure rotor runout, further reducing labor costs and improving measurement efficiency and reliability.

[0068] The measurement process includes: debugging and calibrating the robot components—an external motor drives the accessory transmission gearbox to rotate, causing the high-pressure and / or low-pressure rotor to rotate steadily and slowly—the robot carrying the measuring unit enters the internal structure of the engine under test through the entry channel and moves to the target position—adjusting the measuring posture so that the measuring unit is aligned perpendicular to the surface under test—the measuring unit measures—data is collected—data is analyzed—the measurement ends. Storage medium 102 also stores a program for executing the above measurement process, which is executed by processor 103 and controlled by the control system to achieve the robot's operation.

[0069] refer to Figures 3 to 7 As shown, in one embodiment, the high-pressure rotor target group includes an upstream target, a midstream target, and a downstream target. The "upstream, midstream, and downstream" are divided based on the engine intake direction, with the airflow flowing from the upstream to the midstream and then to the downstream.

[0070] like Figure 3As shown, the upstream target includes the front grate clamping nut 51 at the front end of the high-pressure compressor rotor, and the corresponding entry channel 400 includes the intermediate casing ventilation pipe 41. The extension part 2 extends from the intermediate casing lower ventilation pipe 41 to carry the measuring part 1 to measure the runout of the front grate clamping nut 51 at the front end of the high-pressure compressor rotor.

[0071] like Figures 4A to 5 As shown, the midstream targets include the high-pressure compressor rotor blade tip 52 and the high-pressure compressor rotor disk cavity 53. The inlet channel 200 corresponding to the high-pressure compressor rotor blade tip 52 includes a high-pressure compressor probe hole 31, specifically, as shown... Figure 4B As shown, the high-pressure compressor borehole 31 may include boreholes S1, S2, S3, S5, S6, S7, S8, and S9, and corresponding to the blade tips of the high-pressure compressor rotor. The borehole diameter is approximately 8 mm, and the blade tip clearance of the high-pressure compressor rotor is approximately 0.75–1.5 mm, allowing the endoscope device 100 to perform measurements. The entry channel 200 corresponding to the high-pressure compressor rotor disk cavity 53 includes an extension casing lead hole, such as… Figure 5 As shown.

[0072] like Figures 6A to 7 As shown, the downstream targets include the high-pressure turbine rotor blade tip 54 and the four-point bearing cavity 55 of the interstage casing. (As...) Figure 6A , Figure 6B As shown, the entry channel 200 corresponding to the high-pressure turbine rotor blade tip 54 includes a high-pressure turbine bore 32, which has a diameter of approximately 10 mm, allowing the endoscope device 100 to be inserted for measurement. Figure 7 As shown, the entry channel 200 corresponding to the four-point bearing cavity 55 of the interstage casing includes the interstage casing oil drain pipe 42. The extension part 2 carries the measuring part 1 from the interstage casing oil drain pipe 42 to the four-point bearing cavity 55 of the interstage casing for measurement.

[0073] like Figures 8 to 9 As shown, the low-pressure rotor target assembly includes a fan shaft 56 and a low-pressure turbine rotor disk cavity 57. (As indicated...) Figure 8 As shown, the inlet channel 200 corresponding to the fan shaft 56 includes a low-pressure compressor rotor speed measuring hole 33. (As indicated...) Figure 9 As shown, the inlet channel 200 corresponding to the low-pressure turbine rotor disk cavity 57 includes the turbine rear casing oil return pipe 43.

[0074] By measuring and analyzing the radial runout mass at different positions of the high-pressure and low-pressure rotors of the engine, not only can a qualitative analysis of the rotor blade abrasion be obtained, but also the smoothness and stability of the engine bearing operation can be assessed. It also serves as a means of inspecting the load-bearing system of the engine stator casing, monitoring the coaxial alignment of the bearing housings. This measurement scheme requires the disassembly of very few engine components, enabling line maintenance, reducing the need for overhaul disassembly, and saving time and labor costs.

[0075] refer to Figure 10 As shown, in one embodiment, the specific steps of the rotor runout measurement method 400 of the robot component 100 using the above-described rotor runout measurement system may include:

[0076] The robot component enters the interior of the test structure through the access channel of the test structure;

[0077] The robot component's control system controls the robot to reach the target position corresponding to the entry channel;

[0078] Adjust the posture of the measuring unit of the robot component to perform the measurement;

[0079] The entry channel includes holes and / or pipes that connect to the outside of the structure of the machine under test, and the target locations include high-pressure rotor target group and low-pressure rotor target group.

[0080] This invention focuses on the overall health management quality of engines. By studying existing engine structures, it proposes using large-aperture holes or pipes connecting the engine's internal and external parts to monitor and inspect the assembly quality and post-testing condition of the high-pressure and low-pressure rotors, or even extend this monitoring to the engine's operational maintenance health status at different stages. Furthermore, this application can also be applied to the structural design and manufacturing of military and civilian aircraft engines, ground gas turbines, or gas generators.

[0081] 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. An engine rotor runout measurement system, characterized in that, include: A robot assembly includes a robot, a measuring unit, and a control system, wherein the measuring unit is disposed on the robot, and the control system controls the movement of the robot; The test unit structure includes an entry channel and a target position corresponding to the entry channel. The entry channel includes holes and / or pipes communicating with the outside of the test unit structure. The target position includes a high-pressure rotor target group and a low-pressure rotor target group. The control system controls the robot to carry the measuring unit into the interior of the machine structure to be tested through the entry channel, so as to reach the target position for measurement.

2. The engine rotor runout measurement system according to claim 1, characterized in that, The robot's length is less than or equal to 30mm, the robot's width is less than or equal to 7mm, and the robot's height is less than or equal to 7mm.

3. The engine rotor runout measurement system according to claim 2, characterized in that, The robot's maximum crawling speed is 5 times its body length, and its minimum turning radius is 30mm.

4. The engine rotor runout measurement system according to claim 1, characterized in that, The robot has a load capacity of more than 5g.

5. The engine rotor runout measurement system according to claim 2, characterized in that, The measuring unit includes a sensor, the diameter of which is smaller than the width of the robot.

6. The engine rotor runout measurement system according to claim 1, characterized in that, The control system includes a remote controller, which is used to control the robot to move to the target location.

7. The engine rotor runout measurement system according to claim 1, characterized in that, The control system includes a readable storage medium and a processor. The readable storage medium stores a route program. The execution content of the route program includes a movement route of the robot from the entry channel to the corresponding target position. The processor executes the route program to control the robot to move along the movement route.

8. The engine rotor runout measurement system according to claim 1, characterized in that, The high-pressure rotor target group includes an upstream target, a midstream target, and a downstream target. The upstream target includes a front grate clamping nut at the front end of the high-pressure compressor rotor. The midstream target includes the high-pressure compressor rotor blade tip and the high-pressure compressor rotor disk cavity. The downstream target includes the high-pressure turbine rotor blade tip and the interstage casing four-point bearing cavity. The entry channel corresponding to the front grate clamping nut at the front end of the high-pressure compressor rotor includes an intermediate casing ventilation pipe. The entry channel corresponding to the high-pressure compressor rotor blade tip includes a high-pressure compressor bore probe. The entry channel corresponding to the high-pressure compressor rotor disk cavity includes an extension casing lead hole. The entry channel corresponding to the high-pressure turbine rotor blade tip includes a high-pressure turbine bore probe. The entry channel corresponding to the interstage casing four-point bearing cavity includes an interstage casing oil drain pipe.

9. The engine rotor runout measurement system according to claim 1, characterized in that, The low-pressure rotor target group includes a fan shaft and a low-pressure turbine rotor disk cavity. The inlet channel corresponding to the fan shaft includes a low-pressure compressor rotor speed measuring hole, and the inlet channel corresponding to the low-pressure turbine rotor disk cavity includes a turbine rear casing oil return pipe.

10. A method for measuring rotor runout based on robot components, characterized in that, The robot component employing the rotor runout measurement system as described in any one of claims 1-9 includes: The robot component enters the interior of the test structure through the access channel of the test structure; The control system of the robot component controls the robot to reach the target position corresponding to the entry channel; The posture of the measuring unit of the robot component is adjusted to perform the measurement; The entry channel includes holes and / or pipes that communicate with the outside of the structure to be tested, and the target location includes a high-pressure rotor target group and a low-pressure rotor target group.

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