Aero-engine fan drive gearbox temperature measuring device and aero-engine

Abstract

The present disclosure relates to an aero-engine fan drive gear box temperature measuring device and an aero-engine, wherein the temperature measuring device comprises: a mounting part, which is provided with a non-contact first temperature measuring part; an adapter flange connected to one end of the mounting part, the adapter flange having a cavity configured to form a space for zoom adjustment of the first temperature measuring part; and a purging part in the shape of a rod and provided with a purging cavity, the first end of the purging part being connected to the end of the adapter flange away from the mounting part, the second end of the purging part being a purging end provided with a blowing port configured to blow out the gas in the purging cavity to remove the medium at the temperature measuring position; a gas introduction passage is provided on the side wall of the purging part, the gas introduction passage being provided on the purging part close to the adapter flange and used to introduce external gas into the purging cavity; wherein the purging part is configured to extend into the fan drive gear box during temperature measurement so that the purging end is close to the temperature measuring position, and the gas introduction passage is located outside the fan drive gear box.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of aero-engines, in particular to an aero-engine fan drive gearbox temperature measuring device and an aero-engine. BACKGROUND

[0002] In the field of aviation, the low-pressure shaft of a geared turbofan engine and the fan are connected by a fan drive gearbox. The transmission part of the fan drive gearbox is a star gear train. The sun gear of the star gear train is connected to the low-pressure shaft of the engine, the inner ring of the star gear train is connected to the fan, and the planetary gears of the star gear train are fixed to the planet carrier.

[0003] During operation, the power transmitted from the low-pressure shaft is transmitted to the engine fan through the meshing of the sun gear and the planetary gear and the meshing of the planetary gear and the inner ring to achieve the effect of speed reduction. The fan drive gearbox in the field of aviation has the characteristics of small size, high speed and large power transmission.

[0004] These characteristics of the fan drive gearbox result in a large amount of heat generation, so a large amount of lubricating oil is needed for cooling and lubrication. In order to study the cooling effect of different injection lubrication parameters, it is necessary to accurately measure the gear temperature under different lubrication modes and to obtain real-time readings, so a high-precision temperature measurement method is needed to measure the gear temperature under high-speed rotation. SUMMARY

[0005] The embodiments of the present disclosure provide an aero-engine fan drive gearbox temperature measuring device and an aero-engine, which can improve the accuracy of fan drive gearbox temperature detection.

[0006] According to a first aspect of the present disclosure, an aero-engine fan drive gearbox temperature measuring device is provided, comprising:

[0007] a temperature measuring device for measuring the temperature of the inner gear of the fan drive gearbox, comprising:

[0008] a mounting member having a non-contact first temperature measuring component arranged therein;

[0009] a conversion flange connected to one end of the mounting member, the conversion flange having a cavity configured to form a space for zoom adjustment of the first temperature measuring component; and

[0010] a purging member in the form of a rod structure and having a purging cavity arranged therein, the first end of the purging member being connected to the end of the conversion flange away from the mounting member, the second end of the purging member serving as a purging end, the purging end having a gas outlet configured to blow out the gas in the purging cavity to remove the medium at the temperature measuring position, and the purging member having a gas introduction passage arranged on the side wall thereof and located close to the conversion flange, the gas introduction passage being configured to introduce external gas into the purging cavity;

[0011] The blowing member is configured to extend into the fan drive gear box during temperature measurement so that the blowing end is close to the temperature measurement position and the air channel is located outside the fan drive gear box.

[0012] In some embodiments, the cavity, the blowing cavity and the blowing port are sequentially arranged to form a light path channel configured to provide a channel for a temperature measurement light path of the first temperature measurement component.

[0013] In some embodiments, the aero-engine fan drive gear box temperature measurement device further comprises:

[0014] The isolation member is arranged at the connection between the adapter flange and the blowing member, and separates the blowing cavity from the cavity. The isolation member is light-transmissive.

[0015] In some embodiments, the aero-engine fan drive gear box temperature measurement device further comprises:

[0016] The second sealing member is arranged on the outer wall of the blowing member and located on the side of the air channel away from the adapter flange in the axial direction, and is configured to seal between the blowing member and the detection hole on the fan drive gear box.

[0017] In some embodiments, the aero-engine fan drive gear box temperature measurement device further comprises:

[0018] The second temperature measurement component is arranged in the blowing member and is configured to detect the temperature of the gas in the blowing cavity; and

[0019] The temperature adjusting component is configured to adjust the temperature of the gas introduced into the blowing cavity according to the detection values of the first temperature measurement component and the second temperature measurement component.

[0020] In some embodiments, the air channel comprises a first air channel and a second air channel, and the blowing cavity comprises a first blowing cavity and a second blowing cavity which are independent of each other,

[0021] The first blowing cavity is located at the center of the blowing member and extends in the axial direction. The first blowing cavity is in communication with the first air channel and forms a light path channel.

[0022] The second blowing cavity is located at the outer periphery of the first blowing cavity and extends in the axial direction. The second blowing cavity is in communication with the second air channel.

[0023] In some embodiments, the aero-engine fan drive gear box temperature measurement device further comprises a second temperature measurement component arranged in the second blowing cavity. The blowing member further comprises a wiring cavity and a mounting hole. The wiring cavity extends in the axial direction. The mounting hole is arranged on the side wall of the blowing member and is in communication with the wiring cavity. A plug is arranged in the mounting hole. A lead hole is arranged in the plug. The wiring cavity and the mounting hole are configured to form a channel for the lead of the second temperature measurement component.

[0024] In some embodiments, the aero-engine fan drive gearbox temperature measuring device further comprises a second temperature measuring component arranged in the second purge cavity, and the gas introduced through the first and second air bleed passages is heated by the same heating source.

[0025] In some embodiments, the air outlet comprises:

[0026] a first air outlet arranged at the center of the air outlet end of the purge member and in communication with the first purge cavity; and

[0027] a second air outlet arranged at the air outlet end of the purge member and surrounding the first air outlet, the second air outlet being in communication with the second purge cavity.

[0028] In some embodiments, the second purge cavity comprises:

[0029] one or more guide cavities arranged at intervals in the circumferential direction and extending in the axial direction; and

[0030] a collection cavity arranged between the guide cavities and the second air outlet and in communication with the one or more guide cavities, the collection cavity tapering from the guide cavities to the second air outlet.

[0031] In some embodiments, the air outlet comprises a first air outlet and a second air outlet, and the purge member comprises:

[0032] a main body portion, a first end of the main body portion being connected to the adapter flange; and

[0033] a first nozzle portion and a second nozzle portion, both of which are detachably connected to a second end of the main body portion, an end portion of the first nozzle portion forming the first air outlet, and the second nozzle portion being coaxially arranged outside the first nozzle portion and forming the annular second air outlet with the first nozzle portion.

[0034] According to a second aspect of the present disclosure, there is provided an aero-engine comprising the aero-engine fan drive gearbox temperature measuring device of the above embodiments.

[0035] The aero-engine fan drive gearbox temperature measuring device of the embodiments of the present disclosure can extend the purge member into the gearbox for detection, so that the purge end is close to the temperature measuring position, and the oil and other media at the temperature measuring position can be blown away in time, so as to avoid affecting the temperature measuring accuracy. Moreover, when the purge member extends into the gearbox for detection, the air bleed passage is located outside the gearbox, so that the air pipe connected with the air bleed passage is also located outside the gearbox, which is easy to realize air supply, and can reduce the size of the detection hole, thereby reducing the gap between the purge member 2 and the detection hole, and preventing the oil mist from escaping outward. BRIEF DESCRIPTION OF DRAWINGS

[0036] The accompanying drawings, which are included to provide a further understanding of the present disclosure and constitute a part of this application, illustrate certain illustrative embodiments of the present disclosure and are used to explain the present disclosure, but do not limit the present disclosure. In the drawings:

[0037] Figure 1 is a front view of the temperature measuring device for a fan drive gear box of an aero-engine of the present disclosure;

[0038] Figure 2 is an A-A cross-sectional view of Figure 1 ;

[0039] Figure 3 is a front view of the temperature measuring device for a fan drive gear box of an aero-engine of the present disclosure;

[0040] Figure 4 is a B-B cross-sectional view of Figure 3 ;

[0041] Figure 5 is a side view of the temperature measuring device for a fan drive gear box of an aero-engine of the present disclosure;

[0042] Figure 6 is a C-C cross-sectional view of Figure 5 ;

[0043] Figure 7 is a D-D cross-sectional view of Figure 5 .

[0044] BRIEF DESCRIPTION OF DRAWINGS

[0045] 1, adapter flange; 2, purge member; 21, main body portion; 22, first nozzle portion; 23, second nozzle portion; 24, first bleed air passage; 25, second bleed air passage; 26, first blowout port; 27, second blowout port; 3, isolation member; 4, first sealing member; 5, plug; 51, lead hole; 6, second sealing member; 7, fastener; 8, second temperature measuring member; Q0, cavity; Q1, first purge cavity; Q2, second purge cavity; Q3, lead cavity. DETAILED DESCRIPTION

[0046] The present disclosure is described in detail below. In the following passages, different aspects of embodiments are defined in more detail. Each aspect so defined can be combined with any other aspect or aspects unless clearly indicated to the contrary. In particular, any feature indicated to be preferred or advantageous can be combined with any other feature or features indicated to be preferred or advantageous.

[0047] The terms "first", "second", and the like in the present disclosure are only used for the convenience of description to distinguish different components with the same name, and do not represent a chronological or primary and secondary relationship.

[0048] In the description of the present application, it should be understood that the terms "in", "out", "up", "down", "left" and "right" and the like indicate the orientation or positional relationship based on the direction of the aero-engine fan drive gear box temperature measuring device in motion, and are only for the convenience of describing the present application, and do not indicate or imply that the device must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application. The "circumferential", "axial" and "radial" mentioned in the subsequent examples are defined based on the purge member.

[0049] The present disclosure provides an aero-engine fan drive gear box temperature measuring device, hereinafter referred to as "temperature measuring device", for measuring the temperature of the gear in the fan drive gear box, in some embodiments, as shown in Figures 1 to 7 The present disclosure provides an aero-engine fan drive gear box temperature measuring device, hereinafter referred to as "temperature measuring device", for measuring the temperature of the gear in the fan drive gear box, in some embodiments, as shown in

[0050] The mounting member is provided with a non-contact first temperature measuring component, for example, the mounting member can adopt a sleeve structure, and the first temperature measuring component can adopt an infrared temperature measuring instrument. The adapter flange 1 is connected to one end of the mounting member, and the adapter flange 1 has a cavity Q0 which is configured to form a space for zoom adjustment of the first temperature measuring component. In the detection process of the infrared temperature measuring instrument, zoom adjustment is required to achieve accurate detection, and the cavity Q0 leaves a space for zoom adjustment of the infrared temperature measuring instrument. For example, the adapter flange 1 can also adopt a cylindrical structure, and according to the use requirement, the adapter flange 1 can adopt a stepped cylindrical structure.

[0051] The purge member 2 is in the form of a rod and has a purge cavity inside. The first end of the purge member 2 is connected to the end of the adapter flange 1 away from the mounting member, and the second end of the purge member 2 serves as a purge end. The purge member 2 is provided with an air guide passage, such as an air guide hole, on the side wall. The air guide passage is provided on the purge member 2 near the adapter flange 1 along the axial direction of the purge member 2, and the air guide passage is connected to an external air pipe for introducing compressed air from the outside into the purge cavity. The purge end has a gas outlet configured to blow out the gas in the purge cavity to remove the medium at the temperature measuring position, for example, the gear, and the medium can be oil mist, impurities or water vapor on the surface of the gear.

[0052] Thus, the mounting member, the adapter flange 1 and the purge member 2 are connected in sequence along the axial direction, and the whole has a long strip structure. The adapter flange 1 and the purge member 2 can be provided with flanges, and are connected by fasteners 7 such as bolts.

[0053] The purge member 2 is configured to extend into the fan drive gear box during temperature measurement so that the purge end is close to the temperature measuring position, and the air guide passage is located outside the fan drive gear box. For example, a detection hole can be formed on the fan drive gear box, and the purge member 2 extends into the gear box through the detection hole.

[0054] The embodiment can eliminate the influence of medium on the detection path and the temperature measurement position of the first temperature measurement component, improve the detection accuracy of the first temperature measurement component, and improve the service life.

[0055] Moreover, the blowing member 2 can extend into the gear box for detection, so that the blowing end is close to the temperature measurement position, the distance between the blowing section and the temperature measurement position is reduced, and the oil and other media at the temperature measurement position can be blown away in time in the high-speed rotating state of the gear, so as to avoid affecting the temperature measurement accuracy. For the fan-driven gear box already formed on the aero-engine, only a detection hole needs to be arranged on the gear box to realize temperature detection of the internal gear.

[0056] In addition, when the blowing member 2 extends into the gear box for detection, the air inlet path is located outside the gear box, so that the air pipe connected with the air inlet path is also located outward of the gear, which is easy to realize air supply, and can reduce the size of the detection hole, thereby reducing the gap between the blowing member 2 and the detection hole, preventing the oil mist from running outwards, and facilitating the sealing between the blowing member 2 and the detection hole.

[0057] As shown in Figure 2 The cavity Q0, the blowing cavity, and the blowing port sequentially form a light path channel and are configured to provide a channel for the temperature measurement light path of the first temperature measurement component. For example, the light emitted by the infrared temperature measurement instrument sequentially passes through the cavity Q0, the blowing cavity, and the blowing port to reach the measured position.

[0058] The blowing cavity of the embodiment can simultaneously serve as a channel for the blowing gas and the temperature measurement light path, which can simplify the structure of the blowing device, and further remove the oil mist and other media in the temperature measurement light path, thereby further improving the temperature measurement accuracy.

[0059] In some embodiments, the temperature measurement device further comprises an isolation member 3 arranged at the connection between the adapter flange 1 and the blowing member 2, and separating the blowing cavity from the cavity Q0. The isolation member 3 is transparent to light. For example, the isolation member 3 can be a quartz sheet.

[0060] Further, the temperature measurement device further comprises a first sealing member 4 arranged at the connection between the isolation member 3 and at least one of the blowing member 2 and the adapter flange 1, for sealing the isolation member 3 at the connection.

[0061] The embodiment can protect the first temperature measurement component and isolate it from the oil mist and other media and the compressed gas, so as to prevent the lens of the first temperature measurement component from being affected by the media in the gear box, the high-temperature, and the high-pressure blowing air, thereby improving the service life.

[0062] In some embodiments, as shown in Figure 2 and Figure 4As shown, the temperature measuring device further comprises a second sealing member 6 arranged on the outer wall of the purge member 2 and located on the side of the air channel away from the adapter flange 1 in the axial direction, configured to seal between the purge member 2 and the detection hole on the fan drive gear box. For example, the second sealing member 6 is a sealing ring sleeved on the outer wall of the purge member 2, and the outer wall of the purge member 2 can have an annular groove to accommodate the second sealing member 6.

[0063] In the axial direction of the purge member 2, since the air channel is located outside the second sealing member 6, the sealing between the purge member 2 and the detection hole can be achieved through the second sealing member 6, preventing the oil mist from escaping outward, improving the safety during detection, and preventing the oil mist from leaking to pollute the external environment of the gear box.

[0064] In some embodiments, as shown in Figure 2 and Figure 4 The temperature measuring device further comprises a second temperature measuring component 8 and a temperature adjusting component, wherein the second temperature measuring component 8 can be a temperature sensor, which is arranged in the purge member 2 and configured to detect the temperature of the gas in the purge cavity by contact temperature measurement; the temperature adjusting component is configured to adjust the temperature of the gas introduced into the purge cavity according to the detection values of the first temperature measuring component and the second temperature measuring component 8.

[0065] This embodiment can obtain the temperature of the purge air to adjust it, so that the temperature of the purge air is controllable, reducing the influence of the temperature difference between the purge air and the measured position on temperature measurement, and improving the temperature measurement accuracy and accuracy.

[0066] In some embodiments, as shown in Figure 2 and Figure 4 The air channel comprises a first air channel 24 and a second air channel 25, and the first air channel 24 and the second air channel 25 are arranged at intervals along the circumference of the purge member 2.

[0067] The purge cavity comprises a first purge cavity Q1 and a second purge cavity Q2 which are independent of each other, wherein the first purge cavity Q1 is located at the center of the purge member 2 and extends in the axial direction, the first purge cavity Q1 is in communication with the first air channel 24, and simultaneously forms a light path channel; the second purge cavity Q2 is located at the outer periphery of the first purge cavity Q1 and extends in the axial direction, and the second purge cavity Q2 is in communication with the second air channel 25.

[0068] Correspondingly, the air outlet comprises a first air outlet 26 arranged at the center of the air outlet end of the purge member 2 and in communication with the first purge cavity Q1, and a second air outlet 27 arranged at the air outlet end of the purge member 2 and surrounding the first air outlet 26, the second air outlet 27 being in communication with the second purge cavity Q2. The first air outlet 26 and the second air outlet 27 are independent.

[0069] The embodiment simultaneously sets the inner and outer two-layer purge cavities, and makes the gas blow out from the first blowing port 26 located at the center and the second blowing port 27 located at the periphery, which can more thoroughly purge the oil mist and other media at the measured position, and reduce the influence of the residual media at the temperature measuring position on the temperature measuring result. Moreover, the first purge cavity Q1 simultaneously forms the light path channel, which can simplify the structure of the purge member 2, and does not need to additionally set the light path channel, so as to reduce the diameter of the purge member 2, reduce the influence of the detection hole on the fan drive gear box, and the gas in the first purge cavity Q1 can also purge the oil mist and other media existing in the light path channel, so as to prevent the oil mist and other media from entering the light path channel from the first blowing port 26, thereby improving the temperature measuring precision.

[0070] In addition, since the first purge cavity Q1 and the second purge cavity Q2 are independent of each other, different pressures can be set for the two purge cavities, so as to obtain a more optimal purging effect, for example, the gas pressure of the second purge cavity Q2 is greater than that of the first purge cavity Q1, which prevents the first purge cavity Q1 from having an adverse effect on the quartz piece due to excessive pressure.

[0071] Since the isolation member 3 is arranged at a position far away from the purging end, the oil mist and other media contacted are less, so that the gas in the first purge cavity Q1 can mainly purge the measured position, and it is beneficial to arrange the first gas guiding passage 24 at a position far away from the purging end on the purge member 2.

[0072] In some embodiments, as Figure 2 and Figure 4 The temperature measuring device further comprises a second temperature measuring component 8 arranged in the second purge cavity Q2, and the purge member 2 further comprises a wire routing cavity Q3 and a mounting hole, the wire routing cavity Q3 extends in the axial direction, the mounting hole is arranged on the outer wall of the purge member 2 and communicates with the wire routing cavity Q3, for example, the mounting hole can be arranged in the radial direction, a plug 5 is arranged in the mounting hole in a detachable threaded manner, a lead hole 51 is arranged in the plug 5, and the wire routing cavity Q3 and the mounting hole are configured to form a channel for leading out the lead wire of the second temperature measuring component 8. After installation, the lead hole 51 on the plug 5 can be sealed with glue to achieve a sealing effect.

[0073] For example, only one set of wire routing cavity Q3 and mounting hole is arranged, or two or more sets of wire routing cavities Q3 and mounting holes can be arranged, so as to install two or more second temperature measuring components 8, so as to provide a backup when the second temperature measuring component 8 fails.

[0074] The embodiment can sequentially lead out the lead wire of the second temperature measuring component 8 outside through the wire routing cavity Q3 and the mounting hole, which is convenient for installing the second temperature measuring component 8 inside the purge member 2 and leading out the lead wire.

[0075] In some embodiments, the temperature measuring device further comprises a second temperature measuring component 8 arranged in the second purge cavity Q2, and the gas introduced through the first air channel 24 and the second air channel 25 is heated by the same heating source. Since the second temperature measuring component 8 is arranged in the first purge cavity Q1, the gas temperature in the first purge cavity Q1 and the second purge cavity Q2 can be simultaneously detected by the second temperature measuring component 8 by introducing the gas from the same heating source.

[0076] In some specific embodiments, as shown in Figures 5 to 7 the first air blowing cavity Q1, the second air blowing cavity Q2 and the wiring cavity Q3 are all circular hole structures, the first air blowing cavity Q1 is a central hole of the purge member 2, the second air blowing cavity Q2 is arranged in two along the circumference and is symmetric with respect to the central axis, the two second air blowing cavities Q2 are independent of each other, and each second air blowing cavity Q2 is correspondingly provided with a second air channel 25. The wiring cavity Q3 can also be arranged in two along the circumference and be symmetric with respect to the central axis.

[0077] In some embodiments, as shown in Figure 2 and Figure 4 the air blowing port comprises a first air blowing port 26 arranged at the center of the air blowing end of the purge member 2 and in communication with the first purge cavity Q1, and a second air blowing port 27 arranged at the air blowing end of the purge member 2 and surrounding the first air blowing port 26, the second air blowing port 27 being in communication with the second purge cavity Q2.

[0078] On this basis, the second purge cavity Q2 comprises one or more guide cavities arranged along the circumference and extending along the axis, and a collection cavity arranged between the guide cavities and the second air blowing port 27 and in communication with the one or more guide cavities, the collection cavity being at least partially tapered from the guide cavities to the second air blowing port 27. For example, the tapered structure can be designed as a circular cone or a pyramid.

[0079] This embodiment can collect the gas in the one or more guide cavities into the same cavity by arranging the collection cavity, so as to be blown out from the second air blowing port 27 together; and the collection cavity is arranged in a tapered structure, which can reduce the purging range, so that the purging is more concentrated, and the gas is more concentrated when being blown out, thereby improving the purging gas pressure and the purging intensity. Further, the outer wall of the purge member 2 corresponding to the collection cavity can also be arranged in a tapered structure, which can make the purge member 2 closer to the to-be-measured position, thereby improving the purging effect.

[0080] In some embodiments, the air blowing port comprises a first air blowing port 26 and a second air blowing port 27, the purging member 2 comprises a main body part 21, a first end of the main body part 21 being connected with the adapter flange 1, and a first nozzle part 22 and a second nozzle part 23, both of which are detachably connected with a second end of the main body part 21, an end of the first nozzle part 22 forming the first air blowing port 26, the second nozzle part 23 being coaxially sleeved outside the first nozzle part 22 and forming an annular second air blowing port 27 with the first nozzle part 22, and an end of the second nozzle part 23 being tapered.

[0081] Specifically, the first nozzle part 22 can be loaded from the first end of the main body part 21 into the first purging cavity Q1 and fixed by screwing, and the second nozzle part 23 can be screwed with the second end of the main body part 21, and an inner cavity of the second nozzle part 23 can form the above-mentioned collection cavity. For example, the second temperature measuring part 8 can be arranged at a position where the first nozzle part 22 is connected with the main body part 21, which is closer to the temperature measuring position, so that the temperature of the gas reaching the temperature measuring position can be more accurately detected.

[0082] This embodiment is convenient for machining various cavities in the purging member 2 and installing the second temperature measuring part 8 in the purging member 2, and the oil mist accumulated in the cavities is also easy to clean.

[0083] Secondly, the present disclosure also provides an aero-engine fan drive gear box temperature measuring device.

[0084] The above has introduced the embodiments provided by the present disclosure in detail. The principles and implementation manners of the present disclosure are described by applying specific embodiments, and the above embodiment descriptions are only used to help understand the method of the present disclosure and its core idea. It should be noted that, for those skilled in the art, without departing from the principles of the present disclosure, the present disclosure can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the present disclosure.

Claims

1. A temperature measuring device for an aircraft engine fan-driven gearbox, used to measure the temperature of the gears inside the fan-driven gearbox, characterized in that, include: The mounting component contains a non-contact first temperature measuring element; A transition flange (1) is connected to one end of the mounting component. The transition flange (1) has a cavity (Q0) which is configured to form a space for the zoom adjustment of the first temperature measuring component. The purge component (2) has a rod-shaped structure and an internal purge chamber. The first end of the purge component (2) is connected to the end of the adapter flange (1) away from the mounting component. The second end of the purge component (2) serves as the purge end, which has an air outlet and is configured to blow out the gas in the purge chamber to remove the medium at the temperature measurement position. The side wall of the purge component (2) is provided with an air intake passage, which is located on the purge component (2) near the adapter flange (1) and is used to introduce external gas into the purge chamber. The isolation element (3) is light-transmitting and is located at the connection between the transition flange (1) and the purge element (2), and isolates the purge chamber from the cavity (Q0); and The second seal (6) is provided on the outer wall of the purge member (2) and is located axially on the side of the air passage away from the adapter flange (1). It is configured to seal between the purge member (2) and the detection hole on the fan drive gearbox. The purge member (2) is configured to extend into the fan drive gearbox during temperature measurement so that the purge end is close to the temperature measurement position, and the air duct is located outside the fan drive gearbox. In the axial direction of the purge member (2), the air duct is located outside the second seal (6). The cavity (Q0), the purge cavity, and the air vent sequentially form an optical path channel, which is configured to provide a channel for the temperature measurement optical path of the first temperature measuring component. The air inlet includes: a first air inlet (26) and a second air inlet (27), and the purging component (2) includes: The main body (21), the first end of which is connected to the transition flange (1); and The first nozzle portion (22) and the second nozzle portion (23) are detachably connected to the second end of the main body portion (21). The end of the first nozzle portion (22) forms the first air inlet (26). The second nozzle portion (23) is coaxially sleeved outside the first nozzle portion (22) and forms an annular second air inlet (27) with the first nozzle portion (22). The end of the second nozzle portion (23) has a tapered structure.

2. The temperature measuring device for the fan-driven gearbox of an aircraft engine according to claim 1, characterized in that, Also includes: The second temperature measuring component (8) is disposed in the purge component (2) and is configured to detect the gas temperature in the purge chamber; and The temperature regulating component is configured to adjust the temperature of the gas introduced into the purge chamber based on the detection values ​​of the first temperature measuring component and the second temperature measuring component (8).

3. The temperature measuring device for the fan-driven gearbox of an aircraft engine according to claim 1, characterized in that, The air intake passage includes a first air intake passage (24) and a second air intake passage (25), and the purge chamber includes a first purge chamber (Q1) and a second purge chamber (Q2) that are independent of each other. The first purge chamber (Q1) is located at the center of the purge member (2) and extends along the axial direction. The first purge chamber (Q1) is connected to the first air intake passage (24) and forms an optical path channel. The second purge chamber (Q2) is located on the outer periphery of the first purge chamber (Q1) and extends axially. The second purge chamber (Q2) is connected to the second air intake passage (25).

4. The temperature measuring device for the aero-engine fan-driven gearbox according to claim 3, characterized in that, It also includes a second temperature measuring component (8) disposed in the second purge chamber (Q2). The purge component (2) is further provided with a wiring cavity (Q3) and a mounting hole. The wiring cavity (Q3) extends axially. The mounting hole is disposed on the side wall of the purge component (2) and communicates with the wiring cavity (Q3). A plug (5) is provided in the mounting hole. A lead wire hole (51) is provided in the plug (5). The wiring cavity (Q3) and the mounting hole are configured to form a channel for the lead wire of the second temperature measuring component (8) to be led out.

5. The temperature measuring device for the aero-engine fan-driven gearbox according to claim 3, characterized in that, It also includes a second temperature measuring component (8) located in the second purge chamber (Q2), and the gas introduced through the first bleed passage (24) and the second bleed passage (25) uses the same heating source.

6. The temperature measuring device for the aero-engine fan-driven gearbox according to claim 3, characterized in that, The air inlet includes: The first air inlet (26) is located at the center of the air blowing end of the purging member (2) and communicates with the first purging chamber (Q1); and The second air inlet (27) is located at the air inlet of the purge member (2) and surrounds the first air inlet (26). The second air inlet (27) is connected to the second purge chamber (Q2).

7. The temperature measuring device for the aero-engine fan-driven gearbox according to claim 6, characterized in that, The second purge chamber (Q2) includes: One or more guide cavities, spaced circumferentially and extending axially; and A collection cavity is located between the guide cavity and the second air inlet (27) and is connected to one or more guide cavities. The collection cavity gradually narrows from the guide cavity to the second air inlet (27).

8. An aircraft engine, characterized in that, include: The temperature measuring device for the fan-driven gearbox of an aircraft engine as described in any one of claims 1 to 7.

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