Fan booster stage test bench and fan booster stage test piece centering method

Abstract

The invention aims to provide a fan booster stage test bench and a fan booster stage test piece centering method. The test bench comprises a test piece driving shaft, a switching support, a double-duct exhaust device, a first position detection unit and a second position detection unit. The first position detection unit is arranged between the inner circumference of the double-duct exhaust device and the shaft body of the test piece driving shaft, and the second position detection unit is arranged between the inner circumference of the double-duct exhaust device and the end face of one end of the test piece driving shaft. Through the test bench and the centering method, the centering difficulty of the fan booster stage test piece can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of aircraft engine fan testing, and in particular to a fan boost stage test bench and a method for centering a fan boost stage test piece. Background Art

[0002] The fan boost stage is a compression component of an aircraft engine. Its working performance and safety margin directly affect the engine's working capacity. In order to verify the design indicators of the fan boost stage, it is necessary to obtain its internal and external performance and working range through bench testing. For the smooth conduct of the fan boost stage test, in addition to the test piece itself having good working characteristics, the installation technical status of the test piece on the test bench also has an important impact on the test.

[0003] The fan boost stage test piece is a double-duct structure, and its exhaust structure is more complicated than that of a single-duct compressor. When the test bench is installed, the drive shaft is located at the center of the exhaust structure. The space is small and it is impossible to install equipment such as laser alignment instruments. Therefore, the test piece shaft alignment is mostly guaranteed by external structures, such as adding a spherical structure for centering and processing a small-clearance sleeve gear structure. This makes the test bench installation more difficult and the alignment accuracy cannot be directly measured.

[0004] How to reduce the difficulty of centering the fan boost stage test piece is an urgent problem that needs to be solved. Summary of the invention

[0005] The object of the present invention is to provide a fan boost stage test bench, which can reduce the difficulty of centering a fan boost stage test piece.

[0006] A fan booster test bench for achieving the above-mentioned purpose comprises:

[0007] A test piece drive shaft, one end of which is drivingly connected to the rotating shaft of the test device, and the other end of which is drivingly connected to the rotating shaft of the fan boost stage test piece;

[0008] A transfer support, arranged on the outer periphery of the rotating shaft in the test device;

[0009] A double-duct exhaust device, one end of which is connected to the outer casing of the fan boost stage test piece, and the other end of which is connected to the adapter support, wherein the double-duct exhaust device has a first airflow channel, and the adapter support has a second airflow channel, and in a connected state, is arranged on the outer periphery of the drive shaft of the test piece, and the first airflow channel is communicated with the second airflow channel;

[0010] A first position detection unit is disposed between the inner periphery of the dual-duct exhaust device and the shaft body of the test piece drive shaft; and

[0011] The second position detection unit is disposed between the inner periphery of the dual-duct exhaust device and the one end surface of the test piece drive shaft.

[0012] In one or more embodiments, the dual duct exhaust device includes an outer duct outer cylinder, an outer duct inner cylinder, an inner duct outer cylinder, an inner duct inner cylinder, and a connecting portion connecting the outer duct outer cylinder, the outer duct inner cylinder, the inner duct outer cylinder, and the inner duct inner cylinder;

[0013] Among them, the first airflow channel includes a first outer duct enclosed between the outer tube of the outer duct and the inner tube of the outer duct, and a first inner duct enclosed between the outer tube of the inner duct and the inner tube of the inner duct, the second airflow channel includes a second outer duct arranged corresponding to the first outer duct and a second inner duct arranged corresponding to the first inner duct, and the first position detection unit and the second position detection unit are respectively arranged on the inner circumference of the inner tube of the inner duct.

[0014] In one or more embodiments, the connecting portion is a leaf-shaped structure.

[0015] In one or more embodiments, the connecting portion is a hollow structure.

[0016] In one or more embodiments, it also includes a traction rope sleeved on the outer circumference of the test piece driving shaft.

[0017] In one or more embodiments, a measuring reference surface is provided in the shaft body of the test piece driving shaft, and the first position detection unit is disposed between the inner periphery of the dual-duct exhaust device and the measuring reference surface.

[0018] In one or more embodiments, the first position detection unit and the second position detection unit are distance measuring sensors.

[0019] On the other hand, according to some embodiments of the present application, a method for centering a fan boost stage test piece is provided, which uses the fan boost stage test bench as described above to realize the centering of the fan boost stage test piece to be tested and the rotating shaft of the test device fixed thereto, and the centering method comprises the following steps:

[0020] Define the direction of the test device's rotation axis in the horizontal plane as the horizontal direction, and the direction perpendicular to the horizontal plane as the vertical direction;

[0021] One end of the test piece drive shaft is docked with the rotating shaft of the test device, and the other end is docked with the rotating shaft of the fan boost stage test piece, so that the test piece drive shaft, the rotating shaft of the test device and the rotating shaft of the fan boost stage test piece in the docked state are coaxial;

[0022] Installing the dual-duct exhaust device having the first position detection unit and the second position detection unit on the outer periphery of the driving shaft of the test piece through the adapter support;

[0023] Obtaining, by means of the first position detection unit, a first horizontal distance along the horizontal direction and a first vertical distance along the vertical direction between the axis center of the dual-duct exhaust device and the axis center of the test piece drive shaft at the axial position where the first position detection unit is located, and a first angle between the distance direction between the axis center of the dual-duct exhaust device and the axis center of the test piece drive shaft and the vertical direction;

[0024] A first deviation of the axis of the dual-duct exhaust device relative to the axis of the test piece drive shaft is calculated by using the first horizontal distance and the first vertical distance;

[0025] Obtaining, by means of the second position detection unit, a second horizontal distance along the horizontal direction and a second vertical distance along the vertical direction between the axis center of the dual-duct exhaust device and the axis center of the test piece drive shaft at the axial position where the second position detection unit is located, and a second angle between the distance direction between the axis center of the dual-duct exhaust device and the axis center of the test piece drive shaft and the vertical direction;

[0026] A second deviation of the axis of the dual-duct exhaust device relative to the axis of the test piece drive shaft is calculated by using the second horizontal distance and the second vertical distance;

[0027] The overall deviation between the axis of the dual-duct exhaust device and the axis of the test device shaft, and the overall angle between the distance direction between the axis of the dual-duct exhaust device and the axis of the test device shaft and the vertical direction are calculated through the first deviation, the second deviation, the first angle, and the second angle;

[0028] Adjusting the position of the driving shaft of the test piece until the overall deviation and the overall angle meet the centering accuracy requirement;

[0029] The outer casing of the fan boost stage test piece is connected to the end surface of the double-duct exhaust device to complete the alignment of the entire fan boost stage test piece and the rotating shaft of the test device.

[0030] In one or more embodiments, the first deviation δ1 is calculated by the following formula:

[0031]

[0032] Wherein, x1 is the first horizontal distance, y1 is the first vertical distance;

[0033] The second deviation δ2 is calculated by the following formula:

[0034]

[0035] Wherein, x2 is the second horizontal distance, y2 is the second vertical distance;

[0036] The first angle α1 is calculated by the following formula:

[0037] α1=tanx1 / y1;

[0038] The second angle α2 is calculated by the following formula:

[0039] α2=tanx2 / y2.

[0040] In one or more embodiments, the overall deviation and the overall angle are calculated by a vector synthesis method.

[0041] The beneficial effects of the present invention are:

[0042] The centering method of the fan boost stage test bench and the fan boost stage test piece solves the problem that the centering accuracy value cannot be measured during the installation of the double-duct fan boost stage bench by directly measuring the horizontal and vertical relative distances of the shaft axis and calculating the centering accuracy. The vector synthesis method can be used to obtain the final deviation size and angle, which makes it easier to adjust the position of the shaft and the test piece. At the same time, the spherical structure specially designed for centering can be reduced, the structure can be simplified to reduce weight, save processing cycle and funds, and avoid problems such as test piece shaft wear and bumping due to poor centering accuracy during blind insertion of the test piece.

[0043] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0045] Figure 1 A half-section schematic diagram of some embodiments of the fan boost stage test bench is shown;

[0046] Figure 2 A side schematic diagram of some embodiments of the fan boost stage test bench is shown;

[0047] Figure 3 A schematic diagram of the vector synthesis method is shown. DETAILED DESCRIPTION

[0048] The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0050] In order to solve the aforementioned problems existing in the prior art, on the one hand, a fan boost stage test bench is provided according to some embodiments of the present application, which can easily reduce the difficulty of centering a fan boost stage test piece installed on a test equipment through the fan boost stage test bench. Figure 1 A half-section schematic diagram of some embodiments of the fan boost stage test bench is shown, Figure 2 The side schematic diagram of some embodiments of the fan boost stage test bench is shown, and the fan boost stage test bench includes a test piece drive shaft 1, an adapter support 2, a dual duct exhaust device 3, a first position detection unit 4, and a second position detection unit 5. One end of the test piece drive shaft 1 is transmission-connected to the rotating shaft 6 of the test device, and the other end is transmission-connected to the rotating shaft of the fan boost stage test piece (not shown in the figure). In this connection state, the torsional force shown by the rotating shaft 6 of the test device can be transmitted to the fan boost stage test piece through the test piece drive shaft 1 for testing. The purpose of this test bench is to facilitate the alignment between the fan boost stage test piece as a whole and the rotating shaft 6 of the test device.

[0051] The adapter support 2 is arranged on the outer periphery of the rotating shaft 6 of the test device, one end of the dual-duct exhaust device 3 is connected to the outer casing of the fan boost stage test piece (not shown in the figure), and the other end is connected to the adapter support 2. The dual-duct exhaust device 3 has a first airflow channel 31, and the adapter support 2 has a second airflow channel 21. In the connected state, the dual-duct exhaust device 3 is arranged on the outer periphery of the test piece drive shaft 1, and the first airflow channel 31 is connected to the second airflow channel 21.

[0052] The first position detection unit 4 is disposed between the inner periphery of the dual duct exhaust device 3 and the shaft body of the test piece drive shaft 1, and the second position detection unit 5 is disposed between the inner periphery of the dual duct exhaust device 3 and one end surface where the test piece drive shaft 1 and the rotating shaft 6 of the test device are connected. The first position detection unit 4 is disposed between the inner periphery of the dual duct exhaust device 3 and the shaft body of the test piece drive shaft 1, which means that the axial position of the first position detection unit 4 along the test piece drive shaft 1 is located between the inner periphery of the dual duct exhaust device 3 and the shaft body of the test piece drive shaft 1.

[0053] On the other hand, according to some embodiments of the present application, a method for centering a fan boost stage test piece is provided, which uses the fan boost stage test bench as described above or as recorded in one or more embodiments of the present application to realize the centering of the fan boost stage test piece to be tested and the rotating shaft of the test device fixed thereto. Combining this centering method can further reflect the progressiveness of the fan boost stage test bench. This centering method includes the following steps:

[0054] First, the direction perpendicular to the rotating shaft 6 of the test device in the horizontal plane is defined as the horizontal direction, and the direction perpendicular to the horizontal plane is defined as the vertical direction.

[0055] One end of the test piece drive shaft 1 is docked with the rotating shaft 6 of the test device, and the other end is docked with the rotating shaft of the fan boost stage test piece. In the docked state, the test piece drive shaft 1, the rotating shaft 6 of the test device and the rotating shaft of the fan boost stage test piece are coaxial, thereby first completing the alignment between the rotating shaft in the fan boost stage test piece and the rotating shaft 6 of the test device.

[0056] The dual-duct exhaust device 3 having the first position detection unit 4 and the second position detection unit 5 is mounted on the outer periphery of the driving shaft 1 of the test piece through a transfer support;

[0057] The first horizontal distance in the horizontal direction and the first vertical distance in the vertical direction between the axis of the dual duct exhaust device 3 and the axis of the test piece drive shaft 1 at the axial position where the first position detection unit 4 is located, as well as the first angle between the distance direction between the axis of the dual duct exhaust device 3 and the axis of the test piece drive shaft 1 and the vertical direction are obtained by the first position detection unit 4. It can be understood that the first horizontal distance is represented by the distance between the axis of the dual duct exhaust device 3 and the axis of the test piece drive shaft 1 at the axial position where the first position detection unit 4 is located in the orthographic projection of the horizontal plane, and the first vertical distance is represented by the distance between the axis of the dual duct exhaust device 3 and the axis of the test piece drive shaft 1 at the axial position where the first position detection unit 4 is located in the orthographic projection of the longitudinal section of the test bench. The distance direction between the axis of the dual duct exhaust device 3 and the axis of the test piece drive shaft 1 refers to the direction of the line from the axis of the dual duct exhaust device 3 to the axis of the test piece drive shaft 1 at the axial position where the first position detection unit 4 is located. The axial position of the first position detection unit 4 refers to the position of the first position detection unit 4 along the axial direction of the rotating shaft 6 of the test device.

[0058] The first deviation of the axis of the dual-duct exhaust device 3 relative to the axis of the test piece drive shaft 1 is calculated by the first horizontal distance and the first vertical distance.

[0059] The second horizontal distance in the horizontal direction and the second vertical distance in the vertical direction between the axis of the dual duct exhaust device 3 and the axis of the test piece drive shaft 1 at the axial position where the second position detection unit 5 is located, as well as the second angle between the distance direction between the axis of the dual duct exhaust device 3 and the axis of the test piece drive shaft 1 and the vertical direction are obtained by the second position detection unit 5. Similarly, it can be understood that the second horizontal distance is represented by the distance between the axis of the dual duct exhaust device 3 and the axis of the test piece drive shaft 1 at the axial position where the second position detection unit 5 is located in the orthographic projection of the horizontal plane, and the second vertical distance is represented by the distance between the axis of the dual duct exhaust device 3 and the axis of the test piece drive shaft 1 at the axial position where the second position detection unit 5 is located in the orthographic projection of the longitudinal section of the test bench. The distance direction between the axis of the dual duct exhaust device 3 and the axis of the test piece drive shaft 1 refers to the direction of the line from the axis of the dual duct exhaust device 3 to the axis of the test piece drive shaft 1 at the axial position where the second position detection unit 5 is located. The axial position of the second position detection unit 5 refers to the position of the second position detection unit 5 along the axial direction of the rotating shaft 6 of the test device.

[0060] The second deviation of the axis of the dual-duct exhaust device 3 relative to the axis of the test piece drive shaft 1 is calculated by the second horizontal distance and the second vertical distance.

[0061] The overall deviation between the axis of the dual-duct exhaust device 3 and the axis of the test device shaft, as well as the overall angle between the distance direction and the vertical direction between the axis of the dual-duct exhaust device 3 and the axis of the test device shaft are calculated through the first deviation, the second deviation, the first angle and the second angle.

[0062] Adjust the position of the test piece drive shaft 1 until the overall deviation and the overall angle meet the centering accuracy requirements. After this step of adjustment, the dual duct exhaust device 3 as a whole can be aligned with the rotating shaft 6 of the test device.

[0063] Connect the outer casing of the fan boost stage test piece to the end face of the dual duct exhaust device 3 to complete the alignment of the fan boost stage test piece as a whole and the test device rotating shaft. Since the alignment between the dual duct exhaust device 3 as a whole and the rotating shaft 6 of the test device has been completed in the previous step, the outer casing of the fan boost stage test piece in the connected state and the dual duct exhaust device 3 are also coaxial, so the outer casing of the fan boost stage test piece can be aligned with the rotating shaft 6 of the test device.

[0064] Since the axial position of the first position detection unit 4 is exactly at the shaft body of the test piece drive shaft 1, the first deviation and the first angle can reflect the deviation and the angle between the dual ducted exhaust device 3 and the extension line of the axis of the test device's rotating shaft 6 (i.e., the shaft body of the test piece drive shaft 1). At the same time, since the axial position of the second position detection unit 5 is exactly at the connection point between the test device's rotating shaft 6 and the test piece drive shaft 1, the second deviation and the second angle can reflect the deviation and the angle between the dual ducted exhaust device 3 and the axis of the test device's rotating shaft 6. By considering the deviations and angles at both locations for calculation, the overall deviation and the overall angle between the dual ducted exhaust device 3 as a whole and the axis of the test device's rotating shaft 6 can be accurately reflected, so that adjustment can be made according to the calculated value, so that the dual ducted exhaust device 3 as a whole and the rotating shaft 6 of the test device can be well aligned.

[0065] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0066] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0067] In some embodiments of the fan boost stage test bench, the fan boost stage test bench further includes a traction rope 7 sleeved on the outer periphery of the test piece drive shaft 1, one end of the traction rope 7 can be fixed by a pin or bolt, and the other end passes around the test piece drive shaft 1, and the pin or bolt is inserted into the horizontal and vertical pin holes or bolt holes of the front flange of the double duct exhaust device 3. The position of the test piece drive shaft 1 is adjusted by pulling the traction rope 7. In a specific embodiment, the traction rope 7 is a steel wire rope.

[0068] In some embodiments of the fan boost stage test bench, the shaft body of the test piece drive shaft 1 has a measurement reference plane 10, and the first position detection unit 4 is arranged between the inner periphery of the double duct exhaust device and the measurement reference plane 10. It can be understood that the measurement reference plane 10 is a section of the shaft body of the test piece drive shaft 1 defined in the design stage, which is helpful for centering. In other embodiments, the measurement reference plane 10 is not preset in the shaft body of the test piece drive shaft 1, and any position in the shaft body away from the end connected with the rotating shaft 6 of the test device is selected as the axial position where the first position detection unit 4 is arranged.

[0069] In some specific embodiments of the fan boost stage test piece centering method,

[0070] The first deviation δ1 is calculated by the following formula:

[0071]

[0072] Wherein, x1 is the first horizontal distance, y1 is the first vertical distance;

[0073] The second deviation δ2 is calculated by the following formula:

[0074]

[0075] Wherein, x2 is the second horizontal distance, y2 is the second vertical distance;

[0076] The first angle α1 is calculated by the following formula:

[0077] α1=tanx1 / y1;

[0078] The second angle α2 is calculated by the following formula:

[0079] α2=tanx2 / y2.

[0080] In some specific embodiments of the fan boost stage test piece alignment method, the overall deviation and the overall angle are calculated by vector synthesis method. Figure 3A schematic diagram of the vector synthesis method is shown, wherein a coordinate system can be established with the horizontal direction as the Y-axis, the vertical direction as the X-axis, and the center of the circle at the end face of the rotating shaft 6 of the test device as the origin, and the first deviation δ1 and the second deviation δ2 are expressed in the coordinate system. The overall deviation δ and the overall angle α can be obtained by the vector synthesis method.

[0081] In some specific embodiments, the rotating shaft 6 of the test device is connected to the test piece drive shaft 1 by a flange to ensure the alignment between the two. In other specific embodiments, the rotating shaft 6 of the test device and the test piece drive shaft 1 are designed to be a small interference fit to improve the concentricity of the test piece drive shaft 1 and the rotating shaft 6 of the test device.

[0082] In some specific embodiments of the fan boost stage test bench, the dual-duct exhaust device 3 includes an outer duct outer cylinder 31, an outer duct inner cylinder 32, an inner duct outer cylinder 33, an inner duct inner cylinder 34, and a connecting part 35 connecting the outer duct outer cylinder 31, the outer duct inner cylinder 32, the inner duct outer cylinder 33 and the inner duct inner cylinder 34.

[0083] Among them, the first air flow channel 31 includes a first outer duct 311 enclosed between the outer duct outer tube 31 and the outer duct inner tube 32, and a first inner duct 312 enclosed between the inner duct outer tube 33 and the inner duct inner tube 34. The second air flow channel 21 includes a second outer duct 211 corresponding to the first outer duct 311 and a second inner duct 212 corresponding to the first inner duct 312. The first position detection unit 4 and the second position detection unit 5 are respectively arranged on the inner periphery of the inner duct inner tube 34.

[0084] In some specific embodiments of the fan boost stage test bench, the connecting portion 35 is a blade-shaped structure. In a specific embodiment, the connecting portion 35 is a C4 blade shape, which can reduce exhaust loss.

[0085] In some specific embodiments of the fan boost stage test bench, the first outer duct 311 and the second outer duct 211, the first inner duct 312 and the second inner duct 212 formed by docking are streamlined as a whole after assembly, which can reduce exhaust loss.

[0086] In some specific embodiments of the fan boost stage test bench, the connecting portion 35 is a hollow structure so as to be used for arranging test leads and boresight.

[0087] In some specific embodiments of the fan boost stage test bench, the first position detection unit 4 and the second position detection unit 5 are distance sensors to replace large-sized laser centering instruments and other measuring instruments, and can be installed and used in a small space.

[0088] In some specific embodiments of the fan boost stage test bench, the first position detection unit 4 and the second position detection unit 5 are respectively arranged in multiple pairs, for example four, along the inner circumference of the inner tube 34, and are arranged at 90 degrees in the inner circumference direction of the inner tube 34 between each pair.

[0089] The centering method of the fan boost stage test bench and the fan boost stage test piece solves the problem that the centering accuracy value cannot be measured during the installation of the double-duct fan boost stage bench by directly measuring the horizontal and vertical relative distances of the shaft axis and calculating the centering accuracy. The vector synthesis method can be used to obtain the final deviation size and angle, which makes it easier to adjust the position of the shaft and the test piece. At the same time, the spherical structure specially designed for centering can be reduced, the structure can be simplified to reduce weight, save processing cycle and funds, and avoid problems such as test piece shaft wear and bumping due to poor centering accuracy during blind insertion of the test piece.

[0090] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral 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, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A fan boost test bench, characterized in that: include: A test piece drive shaft, one end of which is drivingly connected to the rotating shaft of the test device, and the other end of which is drivingly connected to the rotating shaft of the fan boost stage test piece; A transfer support, arranged on the outer periphery of the rotating shaft in the test device; A double-duct exhaust device, one end of which is connected to the outer casing of the fan boost stage test piece, and the other end of which is connected to the adapter support, wherein the double-duct exhaust device has a first airflow channel, and the adapter support has a second airflow channel, and in a connected state, is arranged on the outer periphery of the drive shaft of the test piece, and the first airflow channel is communicated with the second airflow channel; A first position detection unit is disposed between the inner periphery of the dual-duct exhaust device and the shaft body of the test piece drive shaft; and The second position detection unit is disposed between the inner periphery of the dual-duct exhaust device and the one end surface of the test piece drive shaft.

2. The fan boost test bench according to claim 1, characterized in that: The dual duct exhaust device comprises an outer duct outer cylinder, an outer duct inner cylinder, an inner duct outer cylinder, an inner duct inner cylinder, and a connecting portion connecting the outer duct outer cylinder, the outer duct inner cylinder, the inner duct outer cylinder, and the inner duct inner cylinder; Among them, the first airflow channel includes a first outer duct enclosed between the outer tube of the outer duct and the inner tube of the outer duct, and a first inner duct enclosed between the outer tube of the inner duct and the inner tube of the inner duct, the second airflow channel includes a second outer duct arranged corresponding to the first outer duct and a second inner duct arranged corresponding to the first inner duct, and the first position detection unit and the second position detection unit are respectively arranged on the inner circumference of the inner tube of the inner duct.

3. The fan boost level test bench according to claim 2, characterized in that: The connecting portion is a leaf-shaped structure.

4. The fan boost test bench according to claim 2, characterized in that: The connecting portion is a hollow structure.

5. The fan boost test bench according to claim 1, characterized in that: It also includes a traction rope sleeved on the outer periphery of the driving shaft of the test piece.

6. The fan boost test bench according to claim 1, characterized in that: The shaft body of the test piece driving shaft has a measurement reference surface, and the first position detection unit is arranged between the inner periphery of the dual-duct exhaust device and the measurement reference surface.

7. The fan boost level test bench according to claim 1, characterized in that: The first position detection unit and the second position detection unit are distance measuring sensors.

8. A method for centering a fan booster test piece, characterized in that: The fan boost stage test bench as claimed in any one of claims 1 to 7 is used to align the fan boost stage test piece to be tested and the rotating shaft of the test device fixed thereto, and the alignment method comprises the following steps: Define the direction of the test device's rotation axis in the horizontal plane as the horizontal direction, and the direction perpendicular to the horizontal plane as the vertical direction; One end of the test piece drive shaft is docked with the rotating shaft of the test device, and the other end is docked with the rotating shaft of the fan boost stage test piece, wherein the test piece drive shaft, the rotating shaft of the test device and the rotating shaft of the fan boost stage test piece are coaxial in the docked state; Installing the dual-duct exhaust device having the first position detection unit and the second position detection unit on the outer periphery of the driving shaft of the test piece through the adapter support; Obtaining, by means of the first position detection unit, a first horizontal distance along the horizontal direction and a first vertical distance along the vertical direction between the axis center of the dual-duct exhaust device and the axis center of the test piece drive shaft at the axial position where the first position detection unit is located, and a first angle between the distance direction between the axis center of the dual-duct exhaust device and the axis center of the test piece drive shaft and the vertical direction; A first deviation of the axis of the dual-duct exhaust device relative to the axis of the test piece drive shaft is calculated by using the first horizontal distance and the first vertical distance; Obtaining, by means of the second position detection unit, a second horizontal distance along the horizontal direction and a second vertical distance along the vertical direction between the axis center of the dual-duct exhaust device and the axis center of the test piece drive shaft at the axial position where the second position detection unit is located, and a second angle between the distance direction between the axis center of the dual-duct exhaust device and the axis center of the test piece drive shaft and the vertical direction; A second deviation of the axis of the dual-duct exhaust device relative to the axis of the test piece drive shaft is calculated by using the second horizontal distance and the second vertical distance; The overall deviation between the axis of the dual-duct exhaust device and the axis of the test device shaft, and the overall angle between the distance direction between the axis of the dual-duct exhaust device and the axis of the test device shaft and the vertical direction are calculated through the first deviation, the second deviation, the first angle, and the second angle; Adjusting the position of the driving shaft of the test piece until the overall deviation and the overall angle meet the centering accuracy requirement; The outer casing of the fan boost stage test piece is connected to the end surface of the double-duct exhaust device to complete the alignment of the entire fan boost stage test piece and the rotating shaft of the test device.

9. The method for centering a fan boost stage test piece according to claim 8, characterized in that: The first deviation δ1 is calculated by the following formula: Wherein, x1 is the first horizontal distance, y1 is the first vertical distance; The second deviation δ2 is calculated by the following formula: Wherein, x2 is the second horizontal distance, y2 is the second vertical distance; The first angle α1 is calculated by the following formula: α1=tanx1 / y1; The second angle α2 is calculated by the following formula: α2=tanx2 / y2.

10. The method for centering a fan boost stage test piece according to claim 8, characterized in that: The overall deviation and the overall angle are calculated by a vector synthesis method.

Images