Engine rotor runout measuring method and measuring system based on endoscope capacitor device

Abstract

The invention relates to an engine rotor run-out measuring method and measuring system based on an endoscope capacitor device. The method comprises the following steps: fixing a capacitance measuring part of the endoscope capacitance device at the front end of an extending part of the endoscope capacitance device; the operation part of the endoscope capacitor device is operated to control the extending part to enter the whole machine structure to be detected from an entering channel of the whole machine structure to be detected, the diameter of the entering channel is larger than or equal to 1 mm, and the entering channel comprises a hole and / or a pipeline and / or a flow channel communicated with the outside of the whole machine structure to be detected; and the capacitance measuring part reaches a target position corresponding to the inlet channel to carry out measurement, wherein the target position comprises a high-voltage rotor target group and a low-voltage rotor target group. 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 an endoscopic capacitance device. 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 an endoscope device.

[0006] According to one aspect of the present invention, a method for measuring rotor runout based on an endoscopic capacitance device includes: fixing the capacitance measuring part of the endoscopic capacitance device to the front end of the extension part of the endoscopic capacitance device; operating the operating part of the endoscopic capacitance device to manipulate the extension part to enter the interior of the machine structure under test through an entry channel, the diameter of the entry channel being greater than or equal to 1 mm, the entry channel including a hole and / or pipe and / or flow channel communicating with the outside of the machine structure under test; and performing measurement by the capacitance measuring part at a target position corresponding to the entry channel, the target position including a high-voltage rotor target group and a low-voltage rotor target group.

[0007] The technical solution of this application employs a capacitance measurement unit, which can adapt to various measurement routes formed by the entry channel and the corresponding target position through an entry channel with a size of not less than 1 mm. Even in measurement routes with many turns and small turning radii, it can successfully reach the target position. The endoscopic capacitance device, in conjunction with the measurement route formed by the entry channel and the corresponding target position, enables measurement of different target positions via the endoscopic device without disassembling the unit. This allows for the measurement of high and low voltage rotor runout in the overall machine state, facilitating advance analysis and reducing unnecessary disassembly work. It also enables assembly inspection and line maintenance after assembly, reducing overhaul disassembly and saving time and labor costs.

[0008] In one or more embodiments of the rotor runout measurement method based on an endoscope capacitance device, the high-voltage rotor target group includes an upstream target, the upstream target includes a driven bevel gear of a central drive gearbox, and the extension portion enters the interior of the machine structure under test through an intermediate casing ventilation pipe to measure the driven bevel gear of the central drive gearbox.

[0009] In one or more embodiments of the rotor runout measurement method based on an endoscope capacitance device, the high-pressure rotor target group further includes a midstream target, which includes a high-pressure compressor rotor blade tip. The extension portion enters the interior of the entire structure under test through a high-pressure compressor probe hole to measure the high-pressure compressor rotor blade tip.

[0010] In one or more embodiments of the rotor runout measurement method based on an endoscope capacitance device, the midstream target further includes a high-pressure compressor rotor disk cavity, and the extension portion enters the interior of the entire structure under test through the extension casing lead hole to perform measurement on the high-pressure compressor rotor disk cavity.

[0011] In one or more embodiments of the rotor runout measurement method based on an endoscope capacitance device, the midstream target further includes a high-pressure compressor exhaust chamber, and the extension portion enters the interior of the machine structure under test through a nozzle mounting hole to measure the high-pressure compressor exhaust chamber.

[0012] In one or more embodiments of the rotor runout measurement method based on an endoscope capacitance device, the high-pressure rotor target group further includes a downstream target, the downstream target including a high-pressure turbine rotor blade tip, and the extension portion extends into the interior of the entire structure under test through a high-pressure turbine borehole to measure the high-pressure turbine rotor blade tip.

[0013] In one or more embodiments of the rotor runout measurement method based on an endoscope capacitance device, the low-pressure rotor target group includes a low-pressure turbine rotor disk cavity, and the extension portion enters the interior of the entire structure under test through the oil return pipe of the turbine rear casing to perform measurement on the low-pressure turbine rotor disk cavity.

[0014] According to another aspect of the present invention, an engine rotor runout measurement system is characterized in that it includes an endoscopic capacitance device and a test engine structure, wherein the endoscopic capacitance device is the endoscopic capacitance device in any of the above-described rotor runout measurement methods, and the test engine structure is the test engine structure in any of the above-described rotor runout measurement methods; the endoscopic capacitance device includes a capacitance measuring part, an insertion part, and an operating part, wherein the capacitance measuring part is fixed to the front end of the insertion part, and the operating part manipulates the insertion part to carry the capacitance measuring part through the entry channel of the test engine structure into the interior of the test engine structure, so as to measure the target position corresponding to the entry channel.

[0015] In one or more embodiments of the engine rotor runout measurement system, the capacitance measurement unit includes a capacitance sensor with a diameter of 6 mm or less and a wire diameter of 3 mm or less.

[0016] In one or more embodiments of the engine rotor runout measurement system, the diameter of the protrusion is less than or equal to 7 mm, and the protrusion is C-shaped. Attached Figure Description

[0017] The above-described 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 flowchart of a rotor runout measurement method based on an endoscope capacitance device according to an embodiment.

[0019] Figure 2 This is a schematic diagram of the structure of an endoscope capacitive device according to one embodiment.

[0020] Figure 3 This is a schematic diagram of the driven bevel gear of the central transmission gearbox of an upstream target and the corresponding entry channel, as shown in one embodiment.

[0021] Figure 4 A schematic diagram of the front grate clamping nut and corresponding inlet channel of the high-pressure compressor rotor of an upstream target, as shown in one embodiment.

[0022] Figure 5A This is a schematic diagram of the inlet channel corresponding to the high-pressure compressor rotor blade tip of a midstream target in one embodiment.

[0023] Figure 5B for Figure 5AThe diagram shows the structure of the midstream target corresponding to the entry channel.

[0024] Figure 6 This is a schematic diagram of the high-pressure compressor rotor disk cavity and corresponding inlet channel of a midstream target in one embodiment.

[0025] Figure 7 This is a schematic diagram of the high-pressure compressor exhaust chamber and corresponding inlet channel of a midstream target in one embodiment.

[0026] Figure 8A This is a schematic diagram of the inlet channel corresponding to the high-pressure turbine rotor blade tip of a downstream target in one embodiment.

[0027] Figure 8B for Figure 8A The diagram shows the structure of the high-pressure turbine rotor blade tip corresponding to the inlet channel.

[0028] Figure 9 This is a schematic diagram of the structure of the four-point bearing cavity of the interstage casing of a downstream target and the corresponding entry channel in one embodiment.

[0029] Figure 10 This is a schematic diagram of the fan shaft and corresponding inlet channel of a low-pressure rotor target assembly according to an embodiment.

[0030] Figure 11 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.

[0031] Figure 12 This is a schematic diagram of the fan disk and corresponding inlet channel of a low-pressure rotor target group according to an embodiment;

[0032] Figure 13 This is a schematic diagram of the three-stage fan booster disk and corresponding inlet channel of a low-pressure rotor target assembly according to an embodiment;

[0033] Figure 14 This is a schematic diagram of the structure of the low-pressure turbine seven-stage disk and the corresponding entry channel of a low-pressure rotor target group according to an embodiment.

[0034] Figure label:

[0035] 1000-Engine rotor runout measurement system;

[0036] 100-Endoscope Capacitive Device;

[0037] 1-Capacitance Measurement Section;

[0038] 10-Capacitive sensor;

[0039] 11-Operation unit, 12-Display unit, 13-Data acquisition unit, 14-Transmission unit;

[0040] 2-Insertion portion;

[0041] 200 - Enter the channel;

[0042] 3-hole;

[0043] 31 - High-pressure compressor borehole probe;

[0044] 32-High-pressure turbine borehole probe;

[0045] 33 - Low-pressure compressor rotor speed measuring hole;

[0046] 34 - Nozzle mounting hole;

[0047] 4-Pipelines;

[0048] 41-Intermediate casing ventilation pipe;

[0049] 42-Interstage casing oil drain pipe;

[0050] 6-Flow channel;

[0051] 601 - Fan casing flow channel;

[0052] 602 - Internal flow channel;

[0053] 603 - Turbine rear casing flow channel;

[0054] 300 - Target location;

[0055] 50 - Driven bevel gear of the central transmission gearbox;

[0056] 51-Pressure nut for front gear teeth at the front end of the high-pressure compressor rotor;

[0057] 52 - High-pressure compressor rotor blade tip;

[0058] 53 - High-pressure compressor rotor disk cavity;

[0059] 54 - High-pressure turbine rotor blade tip;

[0060] 55-stage inter-stage casing four-point bearing cavity;

[0061] 56-Fan shaft;

[0062] 57 - Low-pressure turbine rotor disk cavity;

[0063] 58 - High-pressure compressor exhaust chamber;

[0064] 59-Fan plate;

[0065] 60-Fan booster stage 3-stage disk;

[0066] 61-Low-pressure turbine seven-stage disc;

[0067] 400 - Endoscopic-based method for measuring rotor runout. Detailed Implementation

[0068] 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.

[0069] 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.

[0070] 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.

[0071] refer to Figures 1 to 14 As shown, in one embodiment, the specific steps of the rotor runout measurement method 400 based on the endoscope capacitance device may include:

[0072] The capacitance measuring part 1 of the endoscope capacitance device 100 is fixed to the front end of the extension part 2 of the endoscope capacitance device 100. The meaning of "the whole structure to be tested" is that, relative to the engine being disassembled into unit parts for repair, it is not disassembled, but directly repaired as a whole engine structure.

[0073] The operating part 11 of the endoscope capacitance device 100 is used to manipulate the insertion part 2 to enter the interior of the device under test through the entry channel 200 of the device under test. The diameter of the entry channel 200 is greater than or equal to 1 mm. The entry channel 200 includes a hole 3 and / or a pipe 4 and / or a flow channel 6 that communicate with the outside of the device under test. The meaning of "hole 3 and / or pipe 4 and / or flow channel 6 that communicate with the outside of the device under test" is that the hole 3, pipe 4, and flow channel 6 can extend from the outside of the device under test into the interior of the device under test.

[0074] The capacitance measurement unit 1 reaches the target position 400 corresponding to the entry channel 200 to perform measurement. The target position 400 includes the high-voltage rotor target group and the low-voltage rotor target group.

[0075] The beneficial effects of this embodiment are that, by employing a capacitance measurement unit, it can adapt to various measurement routes formed by the entry channel and the corresponding target position through an entry channel with a size of not less than 1 mm. Even in situations where the measurement route has many turns and small turning radii, it can still successfully reach the target position. The endoscopic capacitance device, in conjunction with the measurement route formed by the entry channel and the corresponding target position, enables measurement of different target positions via the endoscopic device without disassembling the unit. This allows for the measurement of high and low voltage rotor runout in the overall machine state, facilitating advance analysis and research, reducing unnecessary disassembly work, and enabling assembly inspection and line maintenance after assembly. It also reduces overhaul disassembly actions, saving time and labor costs.

[0076] refer to Figures 3 to 9 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.

[0077] like Figure 3 As shown, the upstream target includes the entry channel 200 corresponding to the driven bevel gear 50 of the central transmission gearbox, which includes an intermediate housing ventilation pipe 41. The extension part 2 enters the interior of the entire structure under test through the intermediate housing ventilation pipe 41, bypassing a certain angle to perform the measurement. Figure 4 As shown, the runout of the front grate clamping nut 51 at the front end of the high-pressure compressor rotor can also be measured by extending through the ventilation pipe 41 of the intermediate casing.

[0078] like Figures 5A to 7 As shown, the midstream targets include the high-pressure compressor rotor blade tip 52, the high-pressure compressor rotor disk cavity 53, and the high-pressure compressor exhaust cavity 58. 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 5B 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 6 As shown. The inlet channel 200 corresponding to the high-pressure compressor exhaust chamber 58 includes a nozzle mounting hole 34, such as... Figure 7As shown, the extension part 2 enters the interior of the machine structure under test through the nozzle mounting hole 34, and enters the high-pressure compressor exhaust chamber 58 along the diffuser and the 10-stage stationary vane flow channel to measure the vibration.

[0079] like Figures 8A to 9 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 8A , Figure 8B 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 9 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.

[0080] like Figures 10 to 11 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 10 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 11 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.

[0081] like Figures 12 to 14 As shown, the low-pressure rotor target assembly may also include a fan disk 59, a fan booster stage three-stage disk 60, and a low-pressure turbine seven-stage disk 61. Figure 12 As shown, the inlet channel 200 corresponding to the fan disc 59 includes the fan casing flow channel 601. For example... Figure 13 As shown, the inlet channel 200 corresponding to the three-stage fan booster disk 60 includes the inner flow channel 602. For example... Figure 14 As shown, the inlet channel 200 corresponding to the low-pressure turbine seventh-stage disk 61 includes the turbine rear casing flow channel 603.

[0082] 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 verifying the load-bearing system of the engine stator casing, monitoring the coaxial alignment of the bearing housings. This measurement scheme requires very few engine components to be disassembled, enabling line maintenance, reducing overhaul disassembly, and saving time and labor costs. Furthermore, the measurement route formed by the entry channel and the corresponding target position...

[0083] refer to Figures 2 to 14As shown, in one embodiment, the specific structure of the engine rotor runout measurement system 1000 may include the endoscope device 100 and the entire machine structure to be tested as described in the rotor runout measurement method above. The endoscope device 100 includes a capacitance measurement unit 1, an insertion unit 2, and an operation unit 11. The capacitance measurement unit 1 is fixed to the front end of the insertion unit 2. The operation unit 11 manipulates the insertion unit 2 to carry the capacitance measurement unit 1 from the entry channel 200 of the entire machine structure to be tested into the interior of the entire machine structure to be tested, so as to perform measurement on the target position 300 corresponding to the entry channel 200.

[0084] In one embodiment, such as Figure 2 As shown, the capacitance measurement unit 1 includes a capacitance sensor 10 with a diameter of 6 mm or less and a wire diameter of 3 mm or less. The capacitance measurement unit is small in size, facilitating measurement at the target location. The insertion part 2 has a diameter of 7 mm or less and is C-shaped, making it easy to wrap and carry the capacitance sensor wire, allowing the capacitance measurement unit to reach the target location inside the engine for measurement. The capacitance measurement unit 1 also includes a probe and a display unit 12. The probe and sensor 10 are located at the front end of the insertion part 2, and the probe has a diameter of 3 mm or less. The probe outputs the view from the front of the capacitance measurement unit 1 to the display unit 12, allowing the operator to adjust and position the capacitance sensor using the operating unit 11. The endoscope capacitance device 100 also includes a data acquisition unit 13, which acquires and analyzes the rotor runout value measured by the capacitance sensor 10. It also includes a transmission unit 14, which is connected to the insertion part 2. The data acquisition unit 13 acquires and analyzes the data measured by the capacitance sensor 10 through the transmission unit 14, which includes a cable.

[0085] The measurement process includes: debugging and calibrating the endoscope device; the external motor drives the accessory transmission gearbox to rotate, which in turn drives the high-pressure and / or low-pressure rotor to rotate steadily and slowly; the extension part carrying the capacitance measurement part extends into the interior of the engine under test through the entry channel to reach the target position; adjusting the measurement posture to align with the surface being measured and perpendicular to the surface being measured; the measurement part measures; data is collected; data is analyzed; and the measurement ends.

[0086] 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.

[0087] 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 method for measuring rotor runout based on an endoscopic capacitance device, characterized in that, include: The capacitance measuring part of the endoscope capacitance device is fixed to the front end of the extension part of the endoscope capacitance device; The operating part of the endoscope capacitor device is operated to manipulate the insertion part to enter the interior of the test structure through the entry channel of the test structure. The diameter of the entry channel is greater than or equal to 1 mm. The entry channel includes holes and / or pipes and / or flow channels communicating with the outside of the test structure. The capacitance measurement unit reaches the target position corresponding to the entry channel to perform measurement, and the target position includes the high-voltage rotor target group and the low-voltage rotor target group.

2. The rotor runout measurement method based on an endoscope capacitance device according to claim 1, characterized in that, The high-pressure rotor target group includes an upstream target, which includes a driven bevel gear of the central drive gearbox. The extension part enters the interior of the structure under test through the ventilation pipe of the intermediate casing to measure the driven bevel gear of the central drive gearbox.

3. The rotor runout measurement method based on an endoscope capacitance device according to claim 1, characterized in that, The high-pressure rotor target group also includes a midstream target, which includes the tip of a high-pressure compressor rotor blade. The extension part enters the interior of the structure to be tested through the high-pressure compressor probe hole to measure the tip of the high-pressure compressor rotor blade.

4. The rotor runout measurement method based on an endoscope capacitance device according to claim 3, characterized in that, The midstream target also includes a high-pressure compressor rotor disk cavity. The extension part enters the interior of the entire structure under test through the extension casing lead hole to perform measurement on the high-pressure compressor rotor disk cavity.

5. The rotor runout measurement method based on an endoscope capacitance device according to claim 3, characterized in that, The midstream target also includes the high-pressure compressor exhaust chamber. The extension part enters the interior of the machine structure under test through the nozzle mounting hole to measure the high-pressure compressor exhaust chamber.

6. The rotor runout measurement method based on an endoscope capacitance device according to claim 1, characterized in that, The high-pressure rotor target group also includes a downstream target, which includes a high-pressure turbine rotor blade tip. The extension part extends into the interior of the structure under test through a high-pressure turbine borehole to measure the high-pressure turbine rotor blade tip.

7. The rotor runout measurement method based on an endoscope capacitance device according to claim 1, characterized in that, The low-pressure rotor target group includes a low-pressure turbine rotor disk cavity. The extension part enters the interior of the whole structure under test through the oil return pipe of the turbine rear casing to perform measurement on the low-pressure turbine rotor disk cavity.

8. An engine rotor runout measurement system, characterized in that, The device includes an endoscope capacitance device and a test unit structure. The endoscope capacitance device is the same as the endoscope capacitance device in the rotor runout measurement method according to any one of claims 1-7, and the test unit structure is the same as the test unit structure in the rotor runout measurement method according to any one of claims 1-7. The endoscope capacitance device includes a capacitance measuring part, an insertion part, and an operating part. The capacitance measuring part is fixed to the front end of the insertion part. The operating part manipulates the insertion part to carry the capacitance measuring part from the entry channel of the test unit structure into the interior of the test unit structure to measure the target position corresponding to the entry channel.

9. The engine rotor runout measurement system according to claim 8, characterized in that, The capacitance measurement unit includes a capacitance sensor with a diameter of 6 mm or less and a wire diameter of 3 mm or less.

10. The engine rotor runout measurement system according to claim 8, characterized in that, The diameter of the inserted part is less than or equal to 7 mm, and the inserted part is C-shaped.

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