Aero-engine fan booster stage performance test device

Abstract

The invention belongs to the technical field of aero-engine fan booster stage performance test design, and particularly relates to an aero-engine fan booster stage performance test device, an outer culvert exhaust volute and an inner culvert exhaust volute are designed to be parallel double-stage volutes and are connected with a fan booster stage test piece to form an integrated structure, the overall structure is simple and compact, and the test efficiency is high. Compact layout design can be carried out, the length of a transmission shaft is reduced, the length of a transmission shaft system is reduced, overlarge torque and violent vibration are avoided, collection, measurement and control of internal and external culvert gas are facilitated, and the performance test requirements of a small-size, small-flow and high-rotating-speed fan booster stage can be well met.

Description

Technical Field

[0001] The present application belongs to the technical field of design of performance test for fan boost stage of aircraft engine, and specifically relates to a performance test device for fan boost stage of aircraft engine. Background Art

[0002] The fan boost stage is the main component of a large bypass turbofan engine. The bypass ratio is generally as high as 8 or more. The matching of the aerodynamic design between the fan and the boost stage directly affects the overall performance of the engine.

[0003] The compatibility of the aerodynamic design between the fan and booster stage is verified through fan booster stage performance testing. Currently, the inner and outer exhaust volutes in the fan booster stage performance test device are large and poorly laid out, resulting in a loose overall layout that hinders the collection, measurement, and control of the inner and outer exhaust volutes. Furthermore, the drive shaft is long, resulting in excessive torque and severe vibration, making it difficult to meet the performance testing requirements for small-sized, low-flow, high-speed fan boosters.

[0004] This application is proposed in view of the above-mentioned technical defects. Summary of the Invention

[0005] The purpose of the present application is to provide an aircraft engine fan boost stage performance test device to overcome or alleviate at least one of the known technical defects.

[0006] The technical solution of this application is:

[0007] An aircraft engine fan boost stage performance test device includes a drive motor, an outer exhaust volute, and an inner exhaust volute;

[0008] The driving motor is arranged behind the outlet of the fan boost stage test piece and is connected to the driving shaft of the fan boost stage test piece through a transmission shaft;

[0009] The outer exhaust volute and the inner exhaust volute are annular, and are respectively provided with an outer exhaust pipe and an inner exhaust pipe;

[0010] The outer duct exhaust volute is sleeved on the outer periphery of the drive shaft and is connected to the outer duct outlet of the fan boost stage test piece through the outer duct annular exhaust flow channel formed by the outer duct exhaust outer wall and the outer duct exhaust inner wall;

[0011] The front end of the outer wall of the outer culvert exhaust is connected to the outer wall outlet of the outer culvert, and the rear end is connected to the front side wall of the outer culvert annular exhaust inlet opened on the inner side of the outer culvert exhaust volute; the front end of the inner wall of the outer culvert exhaust is connected to the inner wall outlet of the outer culvert, and the rear end is connected to the rear side wall of the outer culvert annular exhaust inlet;

[0012] The inner exhaust volute is sleeved on the outer periphery of the transmission shaft and is located behind the outer exhaust volute. It is connected to the inner exhaust outlet of the fan boost stage test piece through the inner annular exhaust flow channel formed by the inner exhaust outer wall and the inner exhaust inner wall.

[0013] The inner exhaust outer wall is divided into a front section and a rear section, wherein the front end of the inner exhaust outer wall is connected to the inner wall outlet of the inner exhaust duct, and the front end of the rear section is bolted to the annular boss formed on the outer side of the outer exhaust inner wall through an annular connecting edge, and the annular connecting edge formed at the rear end of the front section is clamped, and the rear end of the rear section is connected to the front side wall of the inner annular exhaust inlet opened on the inner side of the inner exhaust volute;

[0014] The inner wall of the inner exhaust is divided into a front section and a rear section, wherein the front end of the front section is connected to the outlet of the inner wall of the inner channel, the front end of the rear section is connected to the rear end of the front section of the inner exhaust wall, and the rear end of the rear section is connected to the rear side wall of the inner annular exhaust inlet;

[0015] A front bearing seat and a rear bearing seat are formed on the rear section of the inner wall of the exhaust. Roller bearings and ball bearings are installed in the front bearing seat and the rear bearing seat. The roller bearings and the ball bearings are sleeved on the front end and the rear end of the transmission shaft.

[0016] According to at least one embodiment of the present application, in the above-mentioned aircraft engine fan boost stage performance test device, the front end of the transmission shaft is inserted into the rear end of the drive shaft and is connected to the rear end of the drive shaft via a spline, and the front end of the transmission shaft and the rear end of the drive shaft are connected by a coupling;

[0017] The front end of the coupling is sleeved on the rear end of the drive shaft and connected to the rear end of the drive shaft through a spline. The front end of the coupling is sleeved on the front end of the transmission shaft and connected to the front end of the transmission shaft through a spline.

[0018] A torque measuring instrument and a speed change gear box are arranged between the rear end of the transmission shaft and the driving motor.

[0019] According to at least one embodiment of the present application, in the above-mentioned aircraft engine fan boost stage performance test device, the transmission shaft body is separated from the front end and the rear end and is connected with bolts through an annular connecting edge.

[0020] According to at least one embodiment of the present application, in the above-mentioned aircraft engine fan boost stage performance test device, the outer exhaust volute and the inner exhaust volute are horizontally split structures, and the split parts are connected by bolts through an annular connecting edge.

[0021] According to at least one embodiment of the present application, in the above-mentioned aircraft engine fan boost stage performance test device, the front end of the outer wall of the culvert exhaust is connected to the outer wall outlet of the culvert via an annular connecting edge with bolts, and the rear end is inserted into the front side wall of the annular exhaust inlet of the culvert, and is engaged with a stopper and connected with bolts;

[0022] The front end of the outer duct exhaust inner wall is connected to the outer duct inner wall outlet through the stop surface, and the rear end is inserted into the rear side wall of the outer duct annular exhaust inlet, matched with the stop mouth, and connected with bolts.

[0023] According to at least one embodiment of the present application, in the above-mentioned aircraft engine fan boost stage performance test device, the front end of the front section of the inner exhaust outer wall is connected to the inner wall outlet of the inner channel through a stop surface;

[0024] The rear end of the rear section of the inner exhaust outer wall is inserted into the front side wall of the inner annular exhaust inlet, matched with the stopper, and connected by bolts.

[0025] According to at least one embodiment of the present application, in the above-mentioned aircraft engine fan boost stage performance test device, the front end of the front section of the inner wall of the inner exhaust is connected to the outlet of the inner wall of the inner duct through a stop surface;

[0026] The front end of the rear section of the inner wall of the exhaust is connected to the rear end of the front section through the stop surface, and the rear end is inserted into the rear side wall of the inner annular exhaust inlet, matched with the stop mouth, and connected with bolts.

[0027] According to at least one embodiment of the present application, in the above-mentioned aircraft engine fan boost stage performance test device, the outer exhaust volute and the inner exhaust volute are staggered in radial height, and the inner exhaust volute is higher than the outer exhaust volute.

[0028] According to at least one embodiment of the present application, in the above-mentioned aircraft engine fan boost stage performance test device, an outer culvert exhaust flowmeter and an outer culvert exhaust flow regulating valve are provided on the outer culvert exhaust duct, and the outer culvert exhaust duct is connected to an outer culvert exhaust pipe, and an outer culvert exhaust throttle is provided on the outer culvert exhaust pipe;

[0029] An internal exhaust flow meter and an internal exhaust flow regulating valve are arranged on the internal exhaust pipe, and the internal exhaust pipe is connected to the internal exhaust pipe, and an internal exhaust throttle valve is arranged on the internal exhaust pipe.

[0030] According to at least one embodiment of the present application, the above-mentioned aircraft engine fan boost stage performance test device further includes an air intake casing;

[0031] The air intake casing is connected to the inlet of the fan boost stage test piece and is provided with an air intake flow pipe.

[0032] This application has at least the following beneficial technical effects:

[0033] Provided is an aircraft engine fan boost stage performance test device, which improves the exhaust volute related structure and designs the outer exhaust volute and the inner exhaust volute as a parallel double-stage volute, which is connected with the fan boost stage test piece to form an integrated structure. The overall structure is simple and compact, and can be designed in a small size, reducing the length of the drive shaft and the length of the drive shaft system, avoiding excessive torque and severe vibration, and facilitating the collection, measurement and control of inner and outer volute gases, and can well meet the performance test requirements of small-size, low-flow, high-speed fan boost stages. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of an aircraft engine fan boost stage performance test device provided in an embodiment of the present application;

[0035] Figure 2 is a schematic diagram of a transmission shaft and related structures provided in an embodiment of the present application;

[0036] Figure 3 This is a schematic diagram of the assembly of an aircraft engine fan boost stage performance test device provided in an embodiment of the present application;

[0037] Figure 4 This is a schematic diagram of the airflow direction of a fan boost stage of an aircraft engine provided by an embodiment of the present application for a performance test apparatus for the fan boost stage;

[0038] in:

[0039] 1-Intake casing; 2-Drive motor; 3-Exhaust volute; 4-Exhaust volute; 5-Fan boost stage test piece; 6-Drive shaft; 7-Coupling; 8-Torque measuring instrument; 9-Speed transmission gearbox; 10-Intake flow pipe;

[0040] 31 - Outer wall of outer culvert exhaust; 32 - Inner wall of outer culvert exhaust; 33 - Outer culvert exhaust flowmeter; 34 - Outer culvert exhaust flow regulating valve; 35 - Outer culvert exhaust throttle;

[0041] 41 - Exhaust outer wall; 42 - Exhaust inner wall; 43 - Roller bearing; 44 - Ball bearing; 45 - Exhaust flow meter; 46 - Exhaust flow regulating valve; 47 - Exhaust throttle valve;

[0042] 51- drive shaft;

[0043] A1-external channel; B1-internal channel;

[0044] A2-outer annular exhaust duct; B2-outer annular exhaust duct.

[0045] In order to better illustrate this embodiment, some contents of the drawings may be omitted, enlarged or reduced, which is only used for illustrative purposes and should not be construed as limiting this application. DETAILED DESCRIPTION

[0046] To make the technical solution and its advantages of this application more clear, the technical solution of this application will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described here are only some of the embodiments of this application and are only used to explain this application, not to limit this application. It should be noted that for ease of description, only the parts relevant to this application are shown in the accompanying drawings, and other relevant parts can refer to the general design.

[0047] In addition, unless otherwise defined, the technical or scientific terms used in the description of this application shall have the ordinary meanings understood by those skilled in the art to which this application belongs. The term "include" as used in the description of this application means that the concepts preceding the term include the concepts listed after the term and their equivalents, without excluding other related concepts.

[0048] In addition, the words used in the description of this application to indicate orientation are only used to indicate relative directions or positional relationships. When the absolute position of the object being described changes, its relative positional relationship may also change accordingly. It should also be noted that, unless otherwise clearly specified and limited, the words "installation", "connection" and similar words used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand their specific meanings in this application based on the specific circumstances.

[0049] An aircraft engine fan boost stage performance test device, such as Figure 1 As shown, it includes an air intake casing 1, a drive motor 2, an outer exhaust volute 3, and an inner exhaust volute 4.

[0050] The air intake casing 1 is connected to the inlet of the fan boost stage test piece 5, and an air intake flow pipe 10 is provided on it.

[0051] The driving motor 2 is arranged behind the outlet of the fan boost stage test piece 5 to connect to the driving shaft 51 of the fan boost stage test piece 5. The driving motor 2 and the driving shaft 51 can be specifically designed to be connected through a transmission shaft 6.

[0052] The front end of the transmission shaft 6 is inserted into the rear end of the drive shaft 51 and is connected to the rear end of the drive shaft 51 via a spline. It can be further designed that the front end of the transmission shaft 6 and the rear end of the drive shaft 51 are connected by a coupling 7. The front end of the coupling 7 is sleeved on the rear end of the drive shaft 51 and is connected to the rear end of the drive shaft 51 via a spline. The front end of the coupling 7 is sleeved on the front end of the transmission shaft 6 and is connected to the front end of the transmission shaft 6 via a spline.

[0053] A torque meter 8 and a speed change gear box 9 are provided between the rear end of the transmission shaft 6 and the drive motor 2. The torque meter 8 is sleeved on the rear end of the transmission shaft 6 and is connected to the rear end of the transmission shaft 6 via a spline.

[0054] In order to facilitate subsequent assembly, the transmission shaft 6 body can be designed to be separated from the front and rear ends, and connected with bolts through the annular connecting edge, such as Figure 2 shown.

[0055] The outer and inner exhaust volutes 3 and 4 are annular and connect to the outer and inner exhaust ducts A1 and B1, respectively, of the fan boost stage test piece 5. To facilitate subsequent assembly, the outer and inner exhaust volutes 3 and 4 are designed to be horizontally split, connected by bolts at the split ends via an annular connecting edge.

[0056] The outer exhaust volute 3 is sleeved on the outer periphery of the drive shaft 51 and is connected to the outlet of the outer duct A1 through the outer duct annular exhaust flow channel A2 formed by the outer exhaust outer wall 31 and the outer exhaust inner wall 32.

[0057] The front end of the outer wall 31 of the outer duct exhaust is connected to the outer wall outlet of the outer duct A1, and can be connected by bolts through the annular connecting edge, and the rear end is connected to the front side wall of the outer duct annular exhaust inlet opened on the inner side of the outer duct exhaust volute 3, and can be inserted into the front side wall of the outer duct annular exhaust inlet, matched with the stopper, and connected by bolts.

[0058] The front end of the outer duct exhaust inner wall 32 is connected to the inner wall outlet of the outer duct A1, which can be specifically docked through the stop surface, and the rear end is connected to the rear side wall of the outer duct annular exhaust inlet, which can be specifically inserted into the rear side wall of the outer duct annular exhaust inlet, matched with the stopper, and connected with bolts.

[0059] The inner exhaust volute 4 is sleeved on the outer periphery of the transmission shaft 6 and is located behind the outer exhaust volute 3 to form a parallel double-stage volute. The inner annular exhaust flow channel B2 formed by the inner exhaust outer wall 41 and the inner exhaust inner wall 42 is connected to the outlet of the inner channel B1.

[0060] The inner exhaust outer wall 41 is divided into a front section and a rear section, wherein the front end of the front section of the inner exhaust outer wall 41 is connected to the inner wall outlet of the inner channel B1, and can be specifically docked through the stop surface; the front end of the rear section of the inner exhaust outer wall 41 is connected to the annular boss formed on the outside of the outer exhaust inner wall 32 through an annular connecting edge with bolts, and cooperates with the annular connecting edge formed at the rear end of the clamping front section; the rear end of the rear section of the inner exhaust outer wall 41 is connected to the front side wall of the inner annular exhaust inlet opened on the inner side of the inner exhaust volute 4, and can be specifically inserted into the front side wall of the inner annular exhaust inlet, matched with the stop mouth, and connected with bolts.

[0061] The inner wall 42 of the inner exhaust is divided into a front section and a rear section, wherein the front end of the front section of the inner exhaust wall 42 is connected to the inner wall outlet of the inner road B1, and can be specifically connected through the stop surface; the front end of the rear section of the inner exhaust wall 42 is connected to the rear end of the front section of the inner exhaust wall 42, and can be specifically connected through the stop surface; the rear end of the rear section of the inner exhaust wall 42 is connected to the rear side wall of the inner annular exhaust inlet, and can be specifically inserted into the rear side wall of the inner annular exhaust inlet, matched with the stop, and connected by bolts, and a front bearing seat and a rear bearing seat are formed on the rear section of the inner exhaust wall 42, and roller bearings 43 and ball bearings 44 are installed in the front bearing seat and the rear bearing seat, and the roller bearings 43 and the ball bearings 44 are sleeved on the front and rear ends of the drive shaft 6 for support.

[0062] In order to increase the compactness of the structure and shorten the axial length, the outer wall 31 of the outer exhaust, the inner wall 32 of the outer exhaust, and the rear ends of the inner exhaust outer wall 41 and the inner exhaust inner wall 42 can be designed to be steeply bent outward to a large extent, so that the outer exhaust volute 3 and the inner exhaust volute 4 are staggered in radial height, and the inner exhaust volute 4 is higher than the outer exhaust volute 3 at the rear, so as to create a larger space for reasonable arrangement.

[0063] An outer exhaust pipe is provided on the outer exhaust volute 3, an outer exhaust flow meter 33 and an outer exhaust flow regulating valve 34 are provided on the outer exhaust pipe, and the outer exhaust pipe is connected to an outer exhaust gas pipe, and an outer exhaust gas throttle 35 is provided on the outer exhaust gas pipe.

[0064] An internal exhaust pipe is provided on the internal exhaust volute 4, an internal exhaust flow meter 45 and an internal exhaust flow regulating valve 46 are provided on the internal exhaust pipe, and the internal exhaust pipe is connected to an internal exhaust pipe, and an internal exhaust throttle valve 47 is provided on the internal exhaust pipe.

[0065] The aircraft engine fan boost stage performance test device disclosed in the above embodiment can be assembled into an integrated component by pushing the exhaust inner wall 42, the transmission shaft 6, the roller bearing 43, the ball bearing 44, and the coupling 7 in a push-fit manner, and then assembled step by step with other components, such as Figure 3 shown.

[0066] The performance test device for the fan boost stage of an aircraft engine disclosed in the above embodiment is used to perform a performance test on the fan boost stage. The motor 2 can be driven through the transmission shaft 6, the drive shaft 51 and other structures to drive the fan boost stage test piece 5 to rotate, and air is sucked in from the air intake casing 1 to work. The air entering the fan boost stage test piece 5 flows into the outer duct A1 and the inner duct B1 of the fan boost stage test piece 5 respectively, and then flows into the outer exhaust volute 3 and the inner exhaust volute 4 through the outer duct annular exhaust flow channel A2 and the outer duct annular exhaust flow channel B2, and is discharged from the outer exhaust duct and the inner exhaust duct. The exhaust volume of the outer duct A1 and the inner duct B1 can be controlled by the outer exhaust flow regulating valve 34 and the inner exhaust flow regulating valve 46. When surge occurs, the outer duct back-surge throttle valve 35 and the inner duct back-surge throttle valve 47 are opened to allow air to be quickly discharged from the outer duct back-surge duct and the inner duct back-surge duct to avoid severe surge and damage to the structure. Figure 4 shown.

[0067] The aircraft engine fan boost stage performance test device disclosed in the above embodiment has improved the exhaust volute related structure, and designed the outer exhaust volute 3 and the inner exhaust volute 4 as a parallel double-stage volute, which is connected to the fan boost stage test piece 5 to form an integrated structure. The overall structure is simple and compact, and can be designed in a small size, reducing the length of the drive shaft 6 and the length of the drive shaft system, avoiding excessive torque and severe vibration, and facilitating the collection, measurement and control of inner and outer gases, which can well meet the performance test requirements of small-size, small-flow, and high-speed fan boost stages.

[0068] The aircraft engine fan boost stage performance test device disclosed in the above embodiment has related structures of the outer exhaust volute 3 and the inner exhaust volute 4 connected and supported to each other, and supported on the transmission shaft 6 by roller bearings 43 and ball bearings 44. Combined with the front and rear fulcrum bearings provided on the drive shaft 51 inside the fan boost stage test piece 5, a four-point support is formed, and the overall structure is stable and reliable.

[0069] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or replacements to the relevant technical features, and the technical solutions after these changes or replacements will fall within the scope of protection of the present application.

Claims

1. An aircraft engine fan boost stage performance test device, characterized in that: It comprises a driving motor (2), an outer exhaust volute (3), and an inner exhaust volute (4); The driving motor (2) is arranged behind the outlet of the fan boost stage test piece (5) and is connected to the driving shaft (51) of the fan boost stage test piece (5) via a transmission shaft (6); The outer exhaust volute (3) and the inner exhaust volute (4) are annular, and are respectively provided with an outer exhaust pipe and an inner exhaust pipe; The outer duct exhaust volute (3) is sleeved on the outer periphery of the drive shaft (51) and is connected to the outer duct (A1) outlet of the fan boost stage test piece (5) through the outer duct annular exhaust flow channel (A2) formed by the outer duct exhaust outer wall (31) and the outer duct exhaust inner wall (32); The front end of the outer wall of the outer duct (31) is connected to the outer wall outlet of the outer duct (A1), and the rear end is connected to the front side wall of the outer duct annular exhaust inlet opened on the inner side of the outer duct exhaust volute (3); the front end of the inner wall of the outer duct (32) is connected to the inner wall outlet of the outer duct (A1), and the rear end is connected to the rear side wall of the outer duct annular exhaust inlet; The inner exhaust volute (4) is sleeved on the outer periphery of the transmission shaft (6) and is located behind the outer exhaust volute (3). The inner exhaust volute (4) is connected to the outlet of the inner channel (B1) of the fan boost stage test piece (5) through the inner annular exhaust flow channel (B2) formed by the inner exhaust outer wall (41) and the inner exhaust inner wall (42); The inner exhaust outer wall (41) is divided into a front section and a rear section, wherein the front end of the front section of the inner exhaust outer wall (41) is connected to the inner wall outlet of the inner channel (B1), and the front end of the rear section is bolted to the annular boss formed on the outer side of the outer exhaust inner wall (32) through an annular connecting edge, and the annular connecting edge formed at the rear end of the front section is clamped, and the rear end of the rear section is connected to the front side wall of the inner annular exhaust inlet opened on the inner side of the inner exhaust volute (4); The exhaust inner wall (42) is divided into a front section and a rear section, wherein the front end of the front section is connected to the inner wall outlet of the inner channel (B1), the front end of the rear section is connected to the rear end of the front section of the exhaust inner wall (42), and the rear end of the rear section is connected to the rear side wall of the inner annular exhaust inlet; A front bearing seat and a rear bearing seat are formed on the rear section of the exhaust inner wall (42). Roller bearings (43) and ball bearings (44) are installed in the front bearing seat and the rear bearing seat. The roller bearings (43) and the ball bearings (44) are sleeved on the front and rear ends of the transmission shaft (6).

2. The aircraft engine fan boost stage performance test device according to claim 1, characterized in that: The front end of the transmission shaft (6) is inserted into the rear end of the drive shaft (51) and is connected to the rear end of the drive shaft (51) via a spline, and the front end of the transmission shaft (6) and the rear end of the drive shaft (51) are connected via a coupling (7); The front end of the coupling (7) is sleeved on the rear end of the drive shaft (51) and is connected to the rear end of the drive shaft (51) through a spline. The front end of the coupling (7) is sleeved on the front end of the transmission shaft (6) and is connected to the front end of the transmission shaft (6) through a spline. A torque measuring instrument (8) and a speed change gear box (9) are arranged between the rear end of the transmission shaft (6) and the driving motor (2).

3. The aircraft engine fan boost stage performance test device according to claim 2, characterized in that: The transmission shaft (6) body is separated from the front end and the rear end and is connected with bolts via an annular connecting edge.

4. The aircraft engine fan boost stage performance test device according to claim 3, characterized in that: The outer exhaust volute (3) and the inner exhaust volute (4) are horizontally split structures, and the split parts are connected by bolts through an annular connecting edge.

5. The aircraft engine fan boost stage performance test device according to claim 4, characterized in that: The front end of the outer wall (31) of the outer duct exhaust is connected to the outer wall outlet of the outer duct (A1) by bolts through an annular connecting edge, and the rear end is inserted into the front side wall of the outer duct annular exhaust inlet, matched with the stopper, and connected by bolts; The front end of the outer duct exhaust inner wall (32) is butted against the inner wall outlet of the outer duct (A1) through a stop surface, and the rear end is inserted into the rear side wall of the outer duct annular exhaust inlet, matched with the stopper, and connected by bolts.

6. The aircraft engine fan boost stage performance test device according to claim 5, characterized in that: The front end of the front section of the inner exhaust outer wall (41) is connected to the inner wall outlet of the inner channel (B1) through a stop surface; The rear end of the rear section of the inner exhaust outer wall (41) is inserted into the front side wall of the inner annular exhaust inlet, matched with the stopper, and connected by bolts.

7. The aircraft engine fan boost stage performance test device according to claim 6, characterized in that: The front end of the front section of the inner exhaust wall (42) is connected to the inner wall outlet of the inner channel (B1) through a stop surface; The front end of the rear section of the exhaust inner wall (42) is connected to the rear end of the front section through a stop surface, and the rear end is inserted into the rear side wall of the exhaust inlet of the inner ring, matched with the stop, and connected by bolts.

8. The aircraft engine fan boost stage performance test device according to claim 7, characterized in that: The outer exhaust volute (3) and the inner exhaust volute (4) are staggered in radial height, and the inner exhaust volute (4) is higher than the outer exhaust volute (3).

9. The aircraft engine fan boost stage performance test device according to claim 8, characterized in that: An outer culvert exhaust flow meter (33) and an outer culvert exhaust flow regulating valve (34) are provided on the outer culvert exhaust pipe, and the outer culvert exhaust pipe is connected to the outer culvert exhaust pipe, and an outer culvert exhaust throttle valve (35) is provided on the outer culvert exhaust pipe; The internal exhaust pipe is provided with an internal exhaust flow meter (45) and an internal exhaust flow regulating valve (46), and the internal exhaust pipe is connected to the internal exhaust pipe, and the internal exhaust pipe is provided with an internal exhaust throttle valve (47).

10. The aircraft engine fan boost stage performance test device according to claim 9, characterized in that: Also included is an air intake casing (1); The air intake casing (1) is connected to the inlet of the fan boost stage test piece (5), and an air intake flow pipe (10) is arranged on the casing.

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