Engine rotor runout measuring system and measuring method based on endoscope optical fiber device

Abstract

The invention relates to an engine rotor runout measuring system and method based on an endoscope optical fiber device. The measuring system comprises an endoscope optical fiber device which comprises an optical fiber measuring part and an extending part, and the optical fiber measuring part is connected to the extending part; the complete machine structure to be tested comprises an inlet channel and target positions corresponding to the inlet channel, the inlet channel comprises a hole and / or a pipeline and / or a flow channel communicated with the outside of the complete machine structure to be tested, and the target positions comprise a high-pressure rotor target group and a low-pressure rotor target group; wherein the diameter of the entering channel is larger than 0.5 mm, the turning radius of the entering channel is larger than 10 times of the diameter of the optical fiber measuring part, and the extending part carries the optical fiber measuring part to extend into the whole machine structure to be measured from the entering channel so as to reach the target position for measurement. And rotor run-out measurement in a complete machine state is realized.

Description

TECHNICAL FIELD

[0001] The technical field of the present application relates to an engine rotor run-out measurement system and a measurement method based on an endoscope optical fiber device. BACKGROUND

[0002] Assembly technology is directly related to engine performance, safety, reliability and stability. The internal cavity of the whole engine is a blind cavity, the rotor and stator are coupled, the high and low pressure are coupled, the accessibility and visibility are very poor, and the measurement and detection means are limited. At present, it is impossible to measure the engine rotor run-out under the whole engine state, and the engine needs to be disassembled for unit inspection. The operation process is complex, time-consuming and labor-intensive.

[0003] There is no effective evaluation method for the assembly quality of the whole engine, and a complete assembly quality closed-loop control has not been formed. SUMMARY

[0004] The purpose of the present application is to provide an engine rotor run-out measurement system.

[0005] Another purpose of the present application is to provide a rotor run-out measurement method based on an endoscope optical fiber device.

[0006] According to one aspect of the present application, an engine rotor run-out measurement system comprises: an endoscope optical fiber device, comprising a fiber measurement part and a stretching part, the fiber measurement part being connected to the stretching part; a whole engine structure to be measured, comprising an access channel and a target position corresponding to the access channel, the access channel comprising a hole and / or a pipeline and / or a flow channel in communication with the outside of the whole engine structure to be measured, and the target position comprising a high-pressure rotor target group and a low-pressure rotor target group; wherein the diameter of the access channel is greater than 0.5mm, the turning radius of the access channel is greater than 10 times the diameter of the fiber measurement part, and the stretching part carries the fiber measurement part to stretch into the inside of the whole engine structure to be measured to reach the target position for measurement.

[0007] The technical solution of the present application adopts a fiber measurement part, which can pass through an access channel with a size not less than 1mm to meet the rotor run-out measurement of a narrow target position. The measurement route formed by the access channel and the corresponding target position can realize the measurement of different target positions by the endoscope optical fiber device without disassembling the unit, realize the high and low pressure rotor run-out measurement under the whole engine state, facilitate early analysis and research, reduce unnecessary disassembly work, realize assembly inspection and air route maintenance after assembly, reduce overhaul disassembly actions, save time and labor cost.

[0008] In one or more embodiments of the engine rotor run-out measurement system, the fiber measurement part comprises a fiber sensor, and the diameter of the fiber sensor is less than or equal to 3mm.

[0009] In one or more embodiments of the engine rotor run-out measurement system, the diameter of the insertion portion is less than or equal to 7mm, and the insertion portion is C-shaped.

[0010] In one or more embodiments of the engine rotor run-out measurement system, the fiber measurement portion includes a probe, the probe is disposed at the front end of the insertion portion together with the sensor, and the diameter of the probe is less than or equal to 3mm.

[0011] In one or more embodiments of the engine rotor run-out measurement system, the high-pressure rotor target group includes a high-pressure upstream target, the high-pressure upstream target includes a high-pressure compressor rotor front-end front labyrinth nut, and the upstream target corresponds to an intermediate casing vent pipe.

[0012] In one or more embodiments of the engine rotor run-out measurement system, the high-pressure rotor target group further includes a high-pressure downstream target, the high-pressure downstream target includes an inter-stage casing four-point bearing cavity, and the inter-stage casing four-point bearing cavity corresponds to an inter-stage casing oil drain pipe.

[0013] In one or more embodiments of the engine rotor run-out measurement system, the low-pressure rotor target group includes a low-pressure upstream target, the low-pressure upstream target includes a fan disk and a fan booster stage tertiary disk, the fan disk corresponds to a fan casing flow channel, and the fan booster stage tertiary disk corresponds to an inner duct flow channel.

[0014] In one or more embodiments of the engine rotor run-out measurement system, the low-pressure rotor target group includes a low-pressure downstream target, the low-pressure downstream target includes a low-pressure turbine seventh stage disk, and the low-pressure turbine seventh stage disk corresponds to a turbine rear casing flow channel.

[0015] In one or more embodiments of the engine rotor run-out measurement system, the endoscope fiber device further includes a transmission portion and a data acquisition portion, the transmission portion is connected to the insertion portion, and the data acquisition portion collects and analyzes data measured by the fiber measurement portion through the transmission portion.

[0016] According to another aspect of the present application, a rotor run-out measurement method based on an endoscope fiber device includes: using an endoscope fiber device of any one of the rotor run-out measurement systems described above; inserting an insertion portion of the endoscope fiber device into an internal part of a whole machine structure to be measured through an access channel of the whole machine structure to be measured, and measuring a target position corresponding to the access channel; wherein the access channel includes a hole and / or a pipeline in communication with an external part of the whole machine structure to be measured, and the target position includes a high-pressure rotor target group and a low-pressure rotor target group. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and other features, aspects and advantages of the present application will become more apparent from the following description in conjunction with the accompanying drawings, in which like reference numerals designate the same features throughout the drawings, and wherein:

[0018] Figure 1 Structure diagram of an embodiment of an endoscopic fiber device.

[0019] Figure 2 Structure diagram of an embodiment of a high pressure upstream target and corresponding access channel.

[0020] Figure 3 Structure diagram of an embodiment of a high pressure downstream target and corresponding access channel.

[0021] Figure 4 Structure diagram of an embodiment of a low pressure upstream target and corresponding access channel.

[0022] Figure 5 Structure diagram of an embodiment of a low pressure upstream target and corresponding access channel.

[0023] Figure 6 Structure diagram of an embodiment of a low pressure upstream target and corresponding access channel.

[0024] Figure 7 Structure diagram of an embodiment of a low pressure downstream target and corresponding access channel.

[0025] Figure 8 Flow diagram of an embodiment of a rotor run-out measurement method based on an endoscopic fiber device.

[0026] Reference numerals:

[0027] 1000 - Engine rotor run-out measurement system

[0028] 100 - Endoscopic fiber device

[0029] 1 - Fiber measurement portion

[0030] 10 - Fiber sensor

[0031] 103 - Operation portion, 104 - Display portion, 105 - Data acquisition portion, 106 - Transmission portion

[0032] 2 - Extension portion

[0033] 200 - Access channel

[0034] 3 - 3-hole;

[0035] 33 - Low pressure compressor rotor speed measurement hole;

[0036] 4 - 4-pipe;

[0037] 41 - Inter-duct intercooler vent tube;

[0038] 42 - Inter-stage case oil drain tube;

[0039] 6 - 6-flow passage;

[0040] 61 - Turbine aft case flow passage;

[0041] 62 - Inward flow passage;

[0042] 63 - Fan case flow passage;

[0043] 300 - Target position;

[0044] 51 - High pressure compressor rotor front end front retainer nut;

[0045] 52 - Fan boost stage 3rd stage disk; 53 - Fan disk; 55 - Inter- stage case 4-pivot bearing cavity;

[0046] 56 - Fan shaft;

[0047] 57 - Low pressure turbine 7th stage disk;

[0048] 400 - Endoscope fiber based rotor run-out measurement method. DETAILED DESCRIPTION

[0049] Reference will now be made in detail to various embodiments of the application, examples of which are illustrated in the accompanying drawings and described below. While the application will be described in conjunction with the exemplary embodiments, it will be understood that the application is not limited to the exemplary embodiments. On the contrary, the application is intended to cover all alternatives, modifications, equivalents, and other embodiments that are included within the spirit and scope of the application as defined by the appended claims.

[0050] Meanwhile, specific words are used in this application to describe the embodiments of the application. As used in the description of the application and the appended claims, the singular forms "a," "an," and "the" are used to include plural forms unless the context clearly dictates otherwise. Also, the term "one" followed by a reference numeral or a plurality of reference numerals does not exclude that more than one of the referenced item can be present. Similarly, the term "at least one" preceding a reference numeral or a plurality of reference numerals does not exclude that more than one of the referenced item can be present. It is further noted that the claims can be drafted to exclude any optional element. As such, these terms are used in the description and in the claims to preserve the recitation of one or more claimed elements in the case of more than one claimed element. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the application.

[0051] Flowcharts are used in this application to illustrate the operations performed by systems according to embodiments of the application. It should be understood that the operations in the figures need not necessarily be performed in the order shown. Other operations can be added or some operations can be removed, or some operations can be performed in parallel.

[0052] Reference Figures 1 to 7 As shown in the figure, in one embodiment, the specific structure of the engine rotor run-out measurement system 1000 can be that it includes an endoscopic fiber device 100 and a whole machine structure to be measured. The meaning of "whole machine structure to be measured" is that the engine is not disassembled into units for maintenance, but is directly maintained in the form of the whole engine structure. The endoscopic fiber device 100 includes a fiber measurement part 1 and a penetrating part 2, and the fiber measurement part 1 is connected to the penetrating part 2. The whole machine structure to be measured includes an access channel 200 and a target position 300 corresponding to the access channel 200, and the access channel 200 includes a hole 3 and / or a pipeline 4 and / or a flow passage 6 that are in communication with the outside of the whole machine structure to be measured. The meaning of "the hole 3 and / or the pipeline 4 and / or the flow passage 6 that are in communication with the outside of the whole machine structure to be measured" is that the inside of the whole machine structure to be measured can be reached from the outside of the whole machine structure to be measured through the hole 3 or the pipeline 4 or the flow passage 6. The target position 300 includes a high-pressure rotor target group and a low-pressure rotor target group. The diameter of the access channel is greater than 0.5 mm, and the turning radius of the access channel is greater than 10 times the diameter of the fiber measurement part. Since the fiber measurement part is prone to damage when it is bent at a large angle, the turning radius of the access channel is required to be greater than 10 times the diameter of the fiber measurement part. Generally, the bending radius of the fiber measurement part is greater than 10 times the diameter of the fiber measurement part itself, but in actual operation, the fiber measurement part is provided with a layer of protective metal or rubber clothing on the outside, so the turning radius of the access channel needs to be greater. When the turning radius of the access channel is greater than 50 mm, the measurement loss is smaller. The penetrating part 2 carries the fiber measurement part 1 to reach the target position 300 in the inside of the whole machine structure to be measured through the access channel 200 to perform measurement.

[0053] The beneficial effects of the embodiment are that the fiber measurement part can be used to measure the rotor run-out of a narrow target position through an access channel with a size of not less than 1 mm, and the measurement route formed by the access channel and the corresponding target position can realize measurement of different target positions by the endoscopic fiber device without disassembling the units, realize high and low pressure rotor run-out measurement in the whole machine state, facilitate early analysis and research, reduce unnecessary disassembly work, realize assembly inspection and in-flight maintenance after assembly, reduce disassembly actions during overhaul, save time and labor costs.

[0054] In one embodiment, as shown in the figure, Figure 1 , Figure 2As shown, the fiber measurement part 1 includes a fiber sensor 10, the diameter of the fiber sensor 10 is less than or equal to 3mm. The fiber measurement part has a small volume, which is convenient to reach the target position for measurement. The diameter of the insertion part 2 is less than or equal to 7mm, and the insertion part 2 is in the shape of C, which is convenient to wrap and carry the fiber sensor, and make the fiber measurement part reach the target position inside the engine for measurement. The endoscope fiber device 100 further includes a probe, an operation part 103 and a display part 104, the probe is arranged at the front end of the insertion part 2 together with the fiber sensor 10, and the diameter of the probe is less than or equal to 3mm. The insertion part 2 carries the fiber measurement part 1 and the probe to the inside of the whole structure of the engine to be measured through the operation of the operation part 103 by the entrance channel 200, and the probe outputs the picture in front of the fiber measurement part 1 to the display part 104, so that the operator adjusts and positions the fiber sensor 10 by operating the operation part 103. The endoscope fiber device 100 further includes a data acquisition part 105, which acquires and analyzes the rotor run-out value measured by the fiber sensor 10, and further includes a transmission part 106 connected with the insertion part 2, the data acquisition part 105 acquires and analyzes the data measured by the fiber sensor 10 through the transmission part 106, and the transmission part 106 includes a cable.

[0055] The measurement process includes debugging and calibrating the endoscope fiber device, connecting the motor driven accessory transmission gear box to drive the high pressure and / or low pressure rotor to rotate stably and slowly, the insertion part carrying the fiber measurement part to the inside of the whole structure of the engine to be measured through the entrance channel to reach the target position, adjusting the measurement posture and aligning with the measured surface, being perpendicular to the measured surface, the fiber measurement part performing measurement, collecting data, analyzing data and ending measurement.

[0056] Reference Figures 2 to 3 As shown, in one embodiment, the target group of the high pressure rotor includes a high pressure upstream target and a high pressure downstream target. Here and hereinafter, "upstream" and "downstream" are divided based on the direction of engine air intake, and the airflow flows from upstream to downstream.

[0057] As shown Figure 2 As shown, the high pressure upstream target includes a high pressure compressor rotor front end front grate compression nut 51, and the corresponding entrance channel 400 of the high pressure upstream target includes an intermediate casing vent pipe 41. The insertion part 2 carries the fiber measurement part 1 to measure the high pressure compressor rotor front end front grate compression nut 51 through the intermediate casing vent pipe 41.

[0058] As shown Figure 3 As shown, the high pressure downstream target includes an interstage casing four fulcrum bearing cavity 55. As shown Figure 3 As shown, the corresponding entrance channel 200 of the interstage casing four fulcrum bearing cavity 55 includes an interstage casing oil discharge pipe 42, and the insertion part 2 carries the fiber measurement part 1 to the interstage casing four fulcrum bearing cavity 55 for measurement through the interstage casing oil discharge pipe 42.

[0059] Referring to Figures 4 to 6 As shown in the drawings, in one embodiment, the low-pressure rotor target group includes a low-pressure upstream target, a low-pressure downstream target.

[0060] As Figures 4 to 6 shown, the low-pressure upstream target includes a fan shaft 56, a fan disk 53, and a fan booster stage tertiary disk 52. As Figure 4 shown, the fan shaft 56 corresponding entry channel 200 includes a low-pressure compressor rotor rotational speed measurement hole 33. As Figure 5 shown, the fan disk 53 corresponding entry channel includes a fan case flow channel 63. As Figure 6 shown, the fan booster stage tertiary disk 52 corresponding entry channel 200 includes an inner shaft flow channel 62.

[0061] As Figure 7 shown, the low-pressure downstream target includes a low-pressure turbine seventh stage disk 57, and the low-pressure turbine seventh stage disk 57 corresponding entry channel 200 includes a turbine rear case flow channel 61.

[0062] By measuring and analyzing the radial runout quality of different positions of the high-pressure and low-pressure rotors of the engine, not only can the qualitative analysis of the blade scraping of the rotors be obtained, but also the smoothness and stability of the bearing operation of the engine can be mastered, and it is also a testing method for the bearing force system of the engine stator case, that is, the coaxial centering effect of the bearing seat is also monitored and observed. The measurement scheme decomposes few engine components, can realize line maintenance, reduces the disassembly action of overhaul, saves time and labor cost.

[0063] Referring to Figure 8 As shown in the drawings, in one embodiment, the specific steps of the rotor runout measurement method 400 based on the endoscopic fiber device can be as follows:

[0064] The endoscopic fiber device of the rotor runout measurement system as described above is adopted;

[0065] The insertion part of the endoscopic fiber device is inserted into the inside of the whole machine structure to be measured from the entry channel of the whole machine structure to be measured, and the target position corresponding to the entry channel is measured;

[0066] The entry channel includes a hole and / or pipeline and / or flow channel in communication with the outside of the whole machine structure to be measured, and the target position includes a high-pressure rotor target group and a low-pressure rotor target group.

[0067] The present application is from the engine health management quality of the whole machine state, through the study of the existing structure of the engine, through the opening of the larger hole or pipeline which can connect the inside and outside of the engine, the assembly quality of the high pressure and low pressure rotor of the engine and the state after the test run or the health state of the route maintenance of the engine in different stages can be monitored and checked. Meanwhile, the present application can also be applied to the structure design and manufacturing of military and civil aviation engines, ground gas engines or gas generators.

[0068] Although the present application is disclosed with the preferred embodiments as above, it is not intended to limit the present application, and any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, which does not deviate from the technical solutions of the present application, falls within the protection scope defined by the claims of the present application.

Claims

1. An engine rotor run-out measurement system characterized by, The endoscope fiber device comprises a fiber measuring part and a stretching part, the fiber measuring part is connected to the stretching part. The whole machine structure to be measured comprises an access channel and target positions corresponding to the access channel, the access channel comprises holes and / or pipelines and / or flow channels which are in communication with the outside of the whole machine structure to be measured, and the target positions comprise high-pressure rotor target groups and low-pressure rotor target groups. The diameter of the access channel is greater than 0.5 mm, the turning radius of the access channel is greater than 10 times the diameter of the fiber measuring part, and the stretching part carries the fiber measuring part to stretch into the inside of the whole machine structure to be measured to reach the target positions for measurement. The fiber measuring part comprises a fiber sensor, and the diameter of the fiber sensor is less than or equal to 3 mm.

2. The engine rotor run-out measurement system of claim 1, wherein, The diameter of the stretching part is less than or equal to 7 mm, and the stretching part is C-shaped.

3. The engine rotor run-out measurement system of claim 2, wherein, The fiber measuring part comprises a probe, the probe is arranged at the front end of the stretching part together with the sensor, and the diameter of the probe is less than or equal to 3 mm.

4. The engine rotor run-out measurement system of claim 2, wherein, The high-pressure rotor target groups comprise high-pressure upstream targets, the high-pressure upstream targets comprise high-pressure compressor rotor front-end front-tooth pressing nuts, and the access channel corresponding to the upstream targets comprises an intermediate casing ventilation pipe.

5. The engine rotor run-out measurement system of claim 1, wherein, The high-pressure rotor target groups further comprise high-pressure downstream targets, the high-pressure downstream targets comprise inter-stage casing four-point bearing cavities, and the access channel corresponding to the inter-stage casing four-point bearing cavities comprises an inter-stage casing oil discharge pipe.

6. The engine rotor run-out measurement system of claim 1, wherein, The low-pressure rotor target groups comprise low-pressure upstream targets, the low-pressure upstream targets comprise a fan disc and a fan pressurization stage three-stage disc, the access channel corresponding to the fan disc comprises a fan casing flow channel, and the access channel corresponding to the fan pressurization stage three-stage disc comprises an inner flow channel.

7. The engine rotor run-out measurement system of claim 1, wherein, The low-pressure rotor target groups comprise low-pressure downstream targets, the low-pressure downstream targets comprise a low-pressure turbine seven-stage disc, and the access channel corresponding to the low-pressure turbine seven-stage disc comprises a turbine rear casing flow channel.

8. The engine rotor run-out measurement system of claim 1, wherein, The endoscope fiber device further comprises a transmission part and a data acquisition part, the transmission part is connected to the stretching part, and the data acquisition part collects data measured by the fiber measuring part through the transmission part and performs analysis.

9. The engine rotor run-out measurement system of claim 1, wherein, The endoscope fiber device adopts the rotor run-out measurement system according to any one of claims 1-9.

10. An endoscope fiber optic based rotor run-out measurement method, characterized by, The stretching part of the endoscope fiber device is stretched into the inside of the whole machine structure to be measured from the access channel of the whole machine structure to be measured, and target positions corresponding to the access channel are measured. The access channel comprises holes and / or pipelines which are in communication with the outside of the whole machine structure to be measured, and the target positions comprise high-pressure rotor target groups and low-pressure rotor target groups. ​ ​

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