ROTATING MODULE FOR A TEST TURBOMACHINE

Abstract

Rotating module (1) for a test turbomachine, the rotating module (1) comprising: - a frame (4) which extends around an axis (X), the frame (4) being fixed and intended to be secured to at least one fixed element of the test turbomachine; - a measuring ring (6) which extends around the axis (X), the ring (6) being movable in rotation around the axis (X) and guided in rotation relative to the frame (4), the ring (6) comprising an annular body (7) around the axis (X), the body (7) having an internal surface (8) which defines a portion of a flow path (9) of an air flow (F), the body (7) carrying at least one measuring instrument (10) configured to measure at least one parameter of the air flow (F). Figure for the abstract: 1

Description

Title of the invention: ROTATING MODULE FOR A TEST TURBOMACHINE Technical field of the invention

[0001] The present invention relates to a rotating module for a test turbomachine, as well as to a test turbomachine comprising such a rotating module. Technical background

[0002] As part of the development of a turbomachine, engine manufacturers carry out various tests aimed in particular at measuring the parameters (pressure, temperature, etc.) of a flow flowing in a vein of the turbomachine.

[0003] For this, it is known to implant intrusive measuring devices, more commonly called "combs" because of their shape, in the vein studied. A comb is conventionally mounted on a fixed element of the turbomachine, for example a casing.

[0004] Motorists note that a comb is suitable for a local study in the vein, but much less for a broad study covering a larger area of ​​the vein.

[0005] Indeed, a broad study requires having close measurements at different axial positions and / or at different angular positions in the vein.

[0006] For this, a first option could be to implant a large number of combs. However, such an option is expensive, and difficult to achieve due to the size of the combs and the limited space available to implant them all.

[0007] A second option could be to have a limited number of combs and to perform different series of measurements by changing the location of the combs from one series to another. However, such an option proves to be long and tedious since it is necessary to disassemble / reassemble all the combs (including the associated wiring) from one series to another.

[0008] The objective of the present invention is therefore to provide a simple, effective and economical solution making it possible to respond to the aforementioned problem. Summary of the invention

[0009] The invention thus provides a rotating module for a test turbomachine, the rotating module comprising: - a frame which extends around an X axis, the frame being fixed and intended to be secured to at least one fixed element of the test turbomachine; - a measuring ring extending around the X-axis, the ring being rotatable around the X-axis and rotatably guided relative to the frame, the ring comprising an annular body around the X-axis, the body having an internal surface which defines a portion of a flow vein of an air flow F, the body carrying at least one measuring instrument configured to measure at least one parameter of the air flow F.

[0010] The rotational mobility of the measuring ring makes it possible to obtain data for different angular positions in the portion of vein studied (and more generally over three hundred and sixty degrees), so as to carry out a complete and precise study of the portion of vein studied.

[0011] The test turbomachine can of course comprise several rotating modules, successive or distant, to extend the study area, and thus carry out a general and precise study of the vein.

[0012] The data obtained make it possible in particular to precisely analyze the aerodynamic, acoustic and aeroelastic behavior of the vein.

[0013] The rotating module according to the invention may comprise one or more of the following characteristics, taken in isolation from one another or in combination with one another: - the chassis comprises two annular flanges around the X axis, these flanges being axially spaced from each other and axially connected to each other by an annular row of bridges around the X axis, the measuring ring being axially located between the two flanges and being partly covered by the bridges; - the measuring ring is rotated about the X axis by a drive device, the drive device comprising a toothed crown which is meshed with a pinion, the pinion being rotated by a rotary actuator, the toothed crown being integral with the frame and the rotary actuator being integral with the measuring ring; - the measuring ring is guided in rotation relative to the frame via two rolling bearings axially spaced from each other, each bearing comprising two external rings housed in the frame, two internal rings housed in the measuring ring and rolling elements placed radially between the external rings and the internal rings; - the annular body comprises at least one radial opening opening inwards, the opening receiving an instrumented shutter on which the measuring instrument is fixed, the measuring instrument projecting inside the annular body of the ring, so that the measuring instrument is immersed in the air flow F; - the measuring instrument comprises a radial and profiled mast, the mast being axially delimited by a leading edge and a trailing edge, the mast comprising a radial row of inlet nozzles, each inlet nozzle projecting axially from the leading edge; - the measuring ring includes a peripheral chute, the chute being open outwardly and extending circumferentially around the X axis, the chute receiving an articulated chain carrying at least the wiring of the measuring instrument; - the rotating module comprises a chain winder, the winder being configured so that the chain is self-retracting; - the reel comprises a return pulley which is fixed in translation and placed in an upper part of a frame of the reel, and a tension pulley which is movable in translation along an inclined part of the frame, the tension pulley being arranged below the return pulley and weighted so as to permanently tension the chain under the action of gravity; - the tension pulley is mounted to be mobile in rotation between two cheeks, each cheek being guided in translation relative to the inclined part of the frame via a slide, the slide comprising a slide engaged in a guide, the slide being integral with the cheek and the guide being integral with the inclined part of the frame.

[0014] The present invention also relates to an X-axis testing turbomachine comprising: - an external and annular casing around the X axis, the external casing having an internal surface which defines a flow vein of an air flow F; - a mobile blower rotating around the X axis, the blower being housed in the vein and driven in rotation by a drive system arranged downstream of the blower, the drive system being at least partly housed in an internal and annular casing around the X axis; - at least one rotating module as described above, the frame and the ring of the rotating module being part of the outer casing, and the inner surface of the body of the ring being part of the inner surface of the outer casing. Brief description of the figures

[0015] The invention will be better understood and other details, characteristics and advantages of the invention will appear more clearly on reading the following description given by way of non-limiting example and with reference to the appended drawings in which:

[0016] [Fig.l] [Fig.l] is a partial perspective view of a rotating module according to the invention;

[0017] [Fig.2] [Fig.2] is an axial half-sectional view of the rotating module of [Fig.l] according to a section plane passing through the drive device;

[0018] [Fig.3] [Fig.3] is a perspective and detailed view of the training device of the rotating module shown in figures 1 and 2;

[0019] [Fig.4] [Fig.4] is a perspective view of a winder of the rotating module;

[0020] [Fig.5] [Fig.5] is a schematic axial sectional view of a turbomachine test according to the invention. Detailed description of the invention

[0021] Figures 1 to 4 show an example of an embodiment of a rotating module 1 for a test turbomachine 2.

[0022] According to the invention, a rotating module 1 comprises: - a frame 4 which extends around an axis X, the frame 4 being fixed and intended to be secured to at least one fixed element 5 of the test turbomachine 2; - a measuring ring 6 which extends around the axis X, the ring 6 being movable in rotation around the axis X and guided in rotation relative to the frame 4, the ring 6 comprising an annular body 7 around the axis X, the body 7 having an internal surface 8 which defines a portion of a flow vein 9 of an air flow F, the body 7 carrying at least one measuring instrument 10 configured to measure at least one parameter of the air flow F.

[0023] The rotational mobility of the measuring ring 6 makes it possible to obtain data for different angular positions in the portion of vein 9 studied (and more generally over three hundred and sixty degrees), so as to carry out a complete and precise study of the portion of vein 9 studied.

[0024] The test turbomachine 2 can of course comprise several rotating modules 1, successive or distant, to extend the study area, and thus carry out a general and precise study of the vein 9.

[0025] The data obtained make it possible in particular to precisely analyze the aerodynamic, acoustic and aeroelastic behavior of vein 9.

[0026] By convention in the present application, the terms “upstream” and “downstream” are defined relative to the direction of circulation of the air flow F in the portion of vein 9 of the rotating module 1 or in the vein 9 of the test turbomachine 2, when the test turbomachine 2 operates in “propulsor” mode.

[0027] Furthermore, by convention in the present application, “axial” or “axially” means any direction parallel to the X axis of the rotating module 1 or the test turbomachine 2, “radial” or “radially” means any direction perpendicular to the X axis of the rotating module 1 or the test turbomachine 2, and “circumferential” or “circumferentially” any direction relative to the circumference of the rotating module 1 or the test turbomachine 2 (as opposed to the axial and radial directions explained above).

[0028] Finally, by convention in the present application, the terms “internal”, “external”, “interior” and “exterior” are defined relative to the X axis of the rotating module 1 or of the test turbomachine 2.

[0029] Advantageously, the chassis 4 of the rotating module 1 comprises two annular flanges 11a, 11b around the axis X, these flanges 11a, 11b being axially spaced apart from each other. of the other and axially connected to each other by an annular row of bridges 12 around the axis X. The measuring ring 6 is then located axially between the two flanges 11a, 11b and is partly covered by the bridges 12.

[0030] According to the embodiment illustrated in particular in [Fig.l], the chassis 4 here comprises six bridges 12 distributed regularly around X. Each leg 13 of a bridge 12 is fixed to the corresponding flange 11a, 11b via screws (for example three screws).

[0031] As illustrated in particular in [Fig.2], the body 7 of the measuring ring 6 is here formed of several annular parts 7a-7g fixed to each other.

[0032] Advantageously, the measuring ring 6 is driven in rotation about the axis X by a drive device 14. The drive device 14 comprises a toothed crown 15 which is meshed with a pinion 16. The pinion 16 is driven in rotation by a rotary actuator 17. The toothed crown 15 is secured to the frame 4 and the rotary actuator 17 is secured to the measuring ring 6. Thus, the toothed crown 15 is fixed in rotation about the axis X and the rotary actuator 17 is movable in rotation about the axis X.

[0033] According to the embodiment illustrated in particular in Figures 2 and 3, the toothed crown 15 is located here axially directly downstream of the upstream flange 11a. The toothed crown 15 has external teeth.

[0034] The rotary actuator 17 is located axially between the two flanges 11a, 11b. The rotary actuator 17 is a geared motor which comprises an electric motor 18 associated with a speed reducer 19. The pinion 16 is connected in rotation with the output shaft 20 of the speed reducer 19 via one or more keys. The geared motor 17 has a 90-degree angle transmission, and in other words the output shaft 20 of the reducer 19 is perpendicular to the output shaft of the electric motor 18. The 90-degree angle transmission makes it possible to limit the axial size of the geared motor 17. The stator 21 of the geared motor 17 is fixed on a support 22 which is itself fixed on the periphery of the body 7 of the ring 6.

[0035] It is worth noting that several parts (upstream flange 11a, bridges 12, body parts 7, etc.) are hidden in [Fig.3] to clearly show the drive device 14.

[0036] Advantageously, the measuring ring 6 is guided in rotation relative to the frame 4 via two rolling bearings 23a, 23b axially spaced from one another. Each bearing 23a, 23b comprises two external rings 24 housed in the frame 4, two internal rings 25 housed in the measuring ring 6 and rolling elements 26 placed radially between the external rings 24 and the internal rings 25.

[0037] According to the embodiment illustrated in particular in [Fig.2], the external rods 24 of the upstream bearing 23a are here housed in an external space formed jointly in the upstream flange 11a and the toothed crown 15, and the internal snap rings 25 of the upstream bearing 23a are housed in an upstream ring 7d of the body 7 of the ring 6. The external snap rings 24 of the downstream bearing 23b are housed in an external space formed jointly in a non-toothed crown 28 and the downstream flange 11b, and the internal snap rings 25 of the downstream bearing 23b are housed in a downstream ring 7e of the body 7 of the ring 6.

[0038] The rotating module 1 further comprises a seal 30 (here a radial contact lip seal) near each of the bearings 23a, 23b and at the interface between the chassis 4 and the ring 6, in order to protect each of the bearings 23a, 23b from the external environment.

[0039] Advantageously, the body 7 of the ring 6 comprises at least one radial opening 31 opening inwards. The opening 31 receives an instrumented shutter 32a on which the measuring instrument 10 is fixed. The measuring instrument 10 projects inside the body 7 of the ring 6, so that the measuring instrument 10 is immersed in the air flow F.

[0040] According to the embodiment illustrated in particular in Figures 1 and 2, the body 7 of the ring 6 here comprises six openings 31 distributed regularly around the axis X. Among these six openings 31, two of them (at 12 o'clock and at 6 o'clock by analogy with the dial of a watch or a clock) each receive an instrumented shutter 32a, the other four openings 31 receiving a non-instrumented shutter 32b. The internal surface of each shutter 32a, 32b is complementary to the internal surface 8 of the body 7 of the ring 6, to ensure aerodynamic continuity.

[0041] Generally, a measuring instrument 10 may be in various forms (for example in the form of a comb or a disc). A measuring instrument 10 may be equipped with one or more measuring sensors (for example pressure sensors and / or temperature sensors).

[0042] According to a particular embodiment, the measuring instrument 10 comprises a radial and profiled mast 33. The mast 33 is delimited axially by a leading edge 34 and a trailing edge 35. The mast 33 comprises a radial row of inlet nozzles 36, each inlet nozzle 36 projecting axially from the leading edge 34. Such a measuring instrument 10 is commonly called a “comb” due to its shape. Such a comb 10 may be equipped with one or more sensors, each sensor being for example placed in one of the inlet nozzles 36.

[0043] According to the embodiment illustrated in particular in Figures 1 and 2, each instrumented shutter 32a here comprises a comb 10 which is intended in particular to carry out pressure and temperature measurements at the boundary layer of the air flow F which is formed in the immediate vicinity of the internal surface 8 of the body 7 of the ring 6.

[0044] Advantageously, the measuring ring 6 comprises a peripheral chute 37 (or slide). The chute 37 is open towards the outside and extends circumferentially around the axis X. The chute 37 receives an articulated chain 38 carrying at least the wiring of the measuring instrument(s) 10. Such a chain 38 is commonly called a “cable chain”.

[0045] Generally speaking, the chain 38 can of course also carry the wiring of the rotary actuator 17 (drive device 14) and the wiring of various sensors installed on the measuring ring 6. In the present application, the term “wiring” encompasses the various cables (electrical, pneumatic, hydraulic, etc.) which make it possible to connect an element secured to the ring 6 to the control system 54.

[0046] According to the embodiment illustrated in Figures 1 to 4, the chute 37 is located axially between the two flanges 11a, 11b, and more precisely directly upstream of the downstream flange 11b. The chute 37 comprises several sections abutting each other around the axis X. The chain 38 comprises a series of links 39 articulated relative to each other. The chain 38 here carries the wiring of the two measuring instruments 10 and the wiring of the geared motor 17.

[0047] Advantageously, the rotating module 1 comprises a winder 40 for the chain 38. The winder 40 is configured so that the chain 38 is self-retracting, and in other words so that the chain 38 winds and unwinds automatically when the ring 6 moves in rotation around the axis X in one direction of rotation or the other.

[0048] Advantageously, the winder 40 comprises a return pulley 41 which is fixed in translation and placed in the upper part of a frame 42 of the winder 40, for example at the top of the frame 42, and a tension pulley 43 which is movable in translation along an inclined part 44 of the frame 42. The tension pulley 43 is arranged below the return pulley 41 and weighted so as to permanently tension the chain 38 under the action of gravity.

[0049] According to the embodiment illustrated in particular in [Fig.4], the reel 40 here comprises a triangulated and mechanically welded frame 42 which comprises a base resting on the ground, an inclined crosspiece 44 which forms the inclined part 44 of the frame 42 and an upright 45 supporting the inclined crosspiece 44.

[0050] The return pulley 41 and the tension pulley 43 are flanged to improve the guidance of the chain 38. The return pulley 41 is placed at the upper end of the inclined crosspiece 44 and is fixed on fairings 46. The tension pulley 43 is mounted to move in rotation between two cheeks 47, each cheek 47 being guided in translation relative to the inclined crosspiece 44 of the frame 42 via a slide 48 (or a slide). The slide 48 comprises a slider 49 engaged in a guide 50, the slider 49 being integral with the cheek 47 and the guide 50 being integral with the crosspiece inclined 44 of the frame 42. The winder 40 further comprises a gutter 51 extending along the inclined crosspiece 44, this gutter 51 being intended to support and guide the chain reserve 38.

[0051] From the reel 40 to the ring 6, the chain 38 is supported and guided successively by the gutter 51, the tension pulley 43, the return pulley 41 and the chute 37. The chain 38 makes a half turn at the tension pulley 43.

[0052] The reel 40 also comprises a first cable path 52 extending along the fairings 46 and a second cable path 53 extending along the upright 45, these cable paths 52, 53 being intended to support and guide the various wiring from the final end of the chain 38 to the control system 54.

[0053] In [Fig. 5] is shown an exemplary embodiment of a test turbomachine 2 which comprises four rotating modules 1 as described previously in connection with figures 1 to 4.

[0054] According to the invention, a test turbomachine 2 with X axis comprises: - an external casing 55 and annular around the axis X, the external casing 55 having an internal surface 56 which defines a flow vein 9 of an air flow F; - a fan 57 movable in rotation around the axis X, the fan 57 being housed in the vein 9 and driven in rotation by a drive system 58 arranged downstream of the fan 57, the drive system 58 being at least partly housed in an internal casing 59 and annular around the axis X; - at least one rotating module 1, the frame 4 and the ring 6 of the rotating module 1 forming part of the external casing 55, and the internal surface 8 of the body 7 of the ring 6 forming part of the internal surface 56 of the external casing 55.

[0055] The exemplary embodiment shown in [Fig. 5] is in no way limiting, the test turbomachine 2 could obviously comprise a different number of rotating modules 1 (for example three or five), and one or more rotating modules 1 arranged differently.

[0056] According to the embodiment illustrated in [Fig. 5], the external casing 55 is formed by the frames 4 and the rings 6 of the four rotating modules 1, and different casing sections 5 which are fixed in rotation. Each rotating module 1 is arranged axially between two casing sections 5. The frame 4 of each rotating module 1 is secured to the casing sections 5 which are directly adjacent to it.

[0057] The test turbomachine 2 further comprises an annular row of outlet guide vanes 60 around the axis X. These outlet guide vanes 60 are better known by the English acronym OGV for “Outlet Guide Vane”. These outlet guide vanes 60 are located directly downstream of the fan 57 and radially connect the outer casing 55 to the inner casing 59.

[0058] The rotating modules I are arranged axially one after the other and distance from each other. More precisely, the first rotating module 1 is arranged at the inlet of the vein 9. The second rotating module 1 is arranged around the fan 57. The third rotating module 1 is arranged directly downstream of the outlet guide vanes 60. The fourth rotating module 1 is arranged in a downstream portion of the vein 9. The annular portion of the vein 9 which is located downstream of the fan 57 can be likened to the secondary vein of a double-flow turbojet.

[0059] The fan 57 comprises an annular row of propulsive blades 61 around the axis X, these propulsive blades 61 being able to have variable pitch or fixed pitch. The drive system 58 of the fan 57 comprises a rotary actuator 62 and a transmission device 63 which makes it possible to transmit the rotational movement initiated by the rotary actuator 62 to the fan 57. The rotary actuator 62 is here an electric motor and the transmission device 63 is composed of shafts 64 linked in rotation to each other. The drive system 58 makes it possible to carry out various tests for different operating modes (in particular “propulsor”, and possibly “reverser”) and at different operating speeds.

Claims

Claims

1. Rotating module (1) for a test turbomachine (2), the rotating module (1) comprising: - a frame (4) which extends around an axis (X), the frame (4) being fixed and intended to be secured to at least one fixed element (5) of the test turbomachine (2); - a measuring ring (6) which extends around the axis (X), the ring (6) being movable in rotation around the axis (X) and guided in rotation relative to the frame (4), the ring (6) comprising an annular body (7) around the axis (X), the body (7) having an internal surface (8) which defines a portion of a flow path (9) of an air flow (F), the body (7) carrying at least one measuring instrument (10) configured to measure at least one parameter of the air flow (F).

2. Rotating module (1) according to claim 1, characterized in that the frame (4) comprises two annular flanges (11a, 11b) around the axis (X), these flanges (11a, 11b) being axially spaced from each other and axially connected to each other by an annular row of bridges (12) around the axis (X), the measuring ring (6) being located axially between the two flanges (11a, 11b) and being partly covered by the bridges (12).

3. Rotating module (1) according to one of the preceding claims, characterized in that the measuring ring (6) is rotated about the axis (X) by a drive device (14), the drive device (14) comprising a toothed crown (15) which is meshed with a pinion (16), the pinion (16) being rotated by a rotary actuator (17), the toothed crown (15) being integral with the frame (4) and the rotary actuator (17) being integral with the measuring ring (6).

4. Rotating module (1) according to one of the preceding claims, characterized in that the measuring ring (6) is guided in rotation relative to the frame (4) via two rolling bearings (23a, 23b) axially spaced from one another, each bearing (23a, 23b) comprising two external rings (24) housed in the frame (4), two internal rings (25) housed in the measuring ring (6) and rolling elements (26) placed radially between the external rings (24) and the internal rings (25).

5. Rotating module (1) according to one of the preceding claims, characterized in that the annular body (7) comprises at least one radial opening (31) opening inwards, the opening (31) receiving an instrumented shutter (32a) on which the measuring instrument (10) is fixed, the measuring instrument (10) projecting inside the annular body (7) of the ring (6), so that the measuring instrument (10) is immersed in the air flow (F).

6. Rotating module (1) according to the preceding claim, characterized in that the measuring instrument (10) comprises a radial and profiled mast (33), the mast (33) being delimited axially by a leading edge (34) and a trailing edge (35), the mast (33) comprising a radial row of inlet nozzles (36), each inlet nozzle (36) projecting axially from the leading edge (34).

7. Rotating module (1) according to one of the preceding claims, characterized in that the measuring ring (6) comprises a peripheral chute (37), the chute (37) being open towards the outside and extending circumferentially around the axis (X), the chute (37) receiving an articulated chain (38) carrying at least the wiring of the measuring instrument (10).

8. Rotating module (1) according to one of the preceding claims, characterized in that the rotating module (1) comprises a winder (40) of the chain (38), the winder (40) being configured so that the chain (38) is self-retracting.

9. Rotating module (l) according to the preceding claim, characterized in that the winder (40) comprises a return pulley (41) which is fixed in translation and placed in the upper part of a frame (42) of the winder (40), and a tension pulley (43) which is movable in translation along an inclined part (44) of the frame (42), the tension pulley (43) being arranged below the return pulley (41) and weighted so as to permanently tension the chain (38) under the action of gravity.

10. Rotating module (1) according to the preceding claim, characterized in that the tension pulley (43) is mounted to move in rotation between two cheeks (47), each cheek (47) being guided in translation relative to the inclined part (44) of the frame (42) via a slide (48), the slide (48) comprising a slider (49) engaged in a guide (50), the slider (49) being integral with the cheek (47) and the guide (50) being integral with the inclined part (44) of the frame (42).

11. Test turbomachine (2) with axis (X) comprising: - an external casing (55) and annular around the axis (X), the external casing (55) having an internal surface (56) which defines a vein (9) flow of an air flow (F); - a fan (57) rotatable around the axis (X), the fan (57) being housed in the duct (9) and driven in rotation by a drive system (58) arranged downstream of the fan (57), the drive system (58) being at least partly housed in an internal casing (59) and annular around the axis (X); - at least one rotating module (1) according to one of the preceding claims, the frame (4) and the ring (6) of the rotating module (1) forming part of the external casing (55), and the internal surface (8) of the body (7) of the ring (6) forming part of the internal surface (56) of the external casing (55).

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