CN213874964U - Complete machine test device and nacelle mounting assembly thereof - Google Patents

Abstract

The utility model provides a nacelle installation component, wherein, the guide rail of axial extension sets up in the mounting bracket, and the lead screw is rotationally installed in the mounting bracket, and adjustable piece has with lead screw threaded connection's screw thread portion and with guide rail sliding fit's sliding part, borrow this, the accessible is set to the adjustable piece and is rotated the lead screw and axial position is adjustable, the moving part set to with guide rail sliding fit, adjustable piece and moving part are articulated respectively with unilateral nacelle along the different positions of axial distribution, keep articulated axis unanimous. The utility model also provides a complete machine test device for aeroengine, including aforementioned nacelle installation component. The nacelle mounting assembly can conveniently mount a single-sided nacelle of a process nacelle below a mounting bracket.

Description

Complete machine test device and nacelle mounting assembly thereof

Technical Field

The utility model relates to a complete machine test device for aeroengine especially, relates to a nacelle installation component, can install the below of mounting bracket with the unilateral nacelle of technology nacelle.

Background

When the aeroengine is tested on a ground test bed, a technical nacelle needs to be installed as an engine outer culvert air flow passage. Commercial aircraft engines are high bypass ratio turbofan engines whose bypass diameter is determined by the size of the fan blades. The diameter of a common commercial aircraft engine fan is about 2m, so that the diameter of a process nacelle used for carrying out test run on a test bed in a complete machine test device can reach more than 2m, and the weight of the process nacelle can reach more than 300 kg. The greater size and weight place greater demands on the manufacture, installation, disassembly, positioning and fixing of the process nacelle.

The connection between the process nacelle and the test bed mounting rack used at present is usually connected by three fixed hinges, the hinge shaft of the hinge is difficult to insert during mounting, the mounting and positioning are difficult, the consumed working hours are high, and the average time of mounting and dismounting consumes 40 persons per hour. The inventor analyzes and considers that the installation is difficult due to insufficient axial freedom degree in the process of installing and disassembling the technical nacelle, and the manufacturing error at the joint of the technical nacelle and the V-shaped groove of the fan case of the engine is difficult to eliminate.

Thus, there is a need for a nacelle mounting assembly that can facilitate the mounting of a process nacelle to a mounting bracket.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a nacelle installation component can be conveniently install the below of mounting bracket with the unilateral nacelle of technology nacelle.

The utility model provides a nacelle mounting assembly, which is used for mounting a unilateral nacelle of a technical nacelle below a mounting frame, wherein the technical nacelle has an axial direction, and in the nacelle mounting assembly, a guide rail extending axially is arranged on the mounting frame; the screw rod is rotatably arranged on the mounting frame; the adjustable part is provided with a thread part in threaded connection with the screw rod and a sliding part in sliding fit with the guide rail, and therefore the adjustable part is arranged to be adjustable in axial position by rotating the screw rod; the movable piece is arranged to be in sliding fit with the guide rail; the adjustable piece and the movable piece are respectively hinged with different parts of the single-side nacelle distributed along the axial direction, and the hinge axes are kept consistent.

In one embodiment, the guide rail is a sliding groove with a wide upper part and a narrow lower part; the adjustable piece and the movable piece are respectively provided with a sliding block matched with the sliding groove.

In one embodiment, the cross-section of the runner is dovetail shaped.

In one embodiment, the adjustable element and/or the movable element is/are hinged to the nacelle on one side by means of a hinge shaft perforation.

In one embodiment, the one-sided nacelle is provided with a pair of lugs at a position corresponding to the adjustable member and/or the movable member, the pair of lugs having a pair of insertion holes for the hinge shaft to pass through, and the through hole for the hinge shaft to pass through of the adjustable member and/or the movable member is interposed between the pair of insertion holes.

In one embodiment, the adjustable element and/or the movable element is provided with a spherical bushing, and a hinge shaft penetrates through the spherical bushing and the one-sided nacelle to hinge the adjustable element and/or the movable element with the one-sided nacelle.

In one embodiment, the mounting bracket has a rib protruding from a bottom surface and extending in an axial direction, the guide rail is provided to the rib, and the lead screw is provided to a side of the rib.

In one embodiment, the adjustable member has two prongs, one of which provides the threaded portion and the other of which provides the sliding portion.

The utility model also provides a complete machine test device for aeroengine, including two aforementioned nacelle installation component, two nacelle installation components install the mounting bracket with the two side nacelles of technology nacelle respectively.

In one embodiment, the guide rails of the two nacelle mounting assemblies are arranged between the screw rods of the two nacelle mounting assemblies.

In the nacelle mounting assembly, the adjustable piece, the movable piece and the axial position of the hinged unilateral nacelle can be adjusted through the rotation of the screw rod, and the movable piece can axially and freely slide, so that the technical nacelle can be conveniently mounted at a proper position below the mounting frame, the manufacturing error of the joint of the technical nacelle and the V-shaped groove of the fan case of the engine can be eliminated, and the repair and rework of the technical nacelle are avoided.

Adopt the guide rail among the above-mentioned nacelle installation component, adjustable piece and moving part isotructure are fixed a position, axial distance between adjustable piece and the moving part can conveniently be adjusted, therefore can eliminate the articulated position of technology nacelle and follow axial distance difference, compare with original fixed hinge structure, can solve the installation of technology nacelle, the axial degree of freedom is not enough in the dismantlement process leads to the problem of installation difficulty, reduce hinge axial distance's the matching degree of difficulty, the installation degree of difficulty that reduces the unilateral nacelle simultaneously realizes that the nacelle is installed and is dismantled fast, reduce the man-hour that the installation nacelle consumes.

Moreover, in the nacelle mounting assembly, the axial distance between the adjustable piece and the movable piece is adjustable, so that the nacelle mounting assembly can be suitable for mounting a plurality of types of nacelles, the applicability to different aero-engines and different types of nacelles is increased, and the reutilization rate of the nacelle mounting assembly is improved.

In the nacelle mounting assembly, the movable member can release the expansion amount of the process nacelle axially heated in the test process, so that the service life of the nacelle can be prolonged.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:

FIG. 1 is a schematic view of an exemplary complete machine test rig including two exemplary nacelle mounting assemblies.

Figure 2 is a partial schematic view of the nacelle mounting assembly of figure 1.

Detailed Description

The present invention will be further described with reference to the following detailed description and the accompanying drawings, wherein the following description sets forth more details for the purpose of providing a thorough understanding of the present invention, but it is obvious that the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar generalizations and deductions based on the practical application without departing from the spirit of the present invention, and therefore, the scope of the present invention should not be limited by the contents of the detailed description.

For example, a first feature described later in the specification may be formed over or on a second feature, and may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact. Further, when a first element is described as being coupled or coupled to a second element, the description includes embodiments in which the first and second elements are directly coupled or coupled to each other, as well as embodiments in which one or more additional intervening elements are added to indirectly couple or couple the first and second elements to each other.

Fig. 1 and 2 show an exemplary configuration of a nacelle mounting assembly 10. The nacelle mounting assembly 10 can mount a single-sided nacelle 201 of a process nacelle 20 below a mounting frame 30. In the figure, the process nacelle 20 is a semi-open nacelle comprising a double-sided nacelle, i.e. two single-sided nacelles 201 that are half-opened or half-closed. The mount 30 may be referred to as an engine mount or a test bed mount.

It is to be understood that, as used herein, the terms "a," "an," and/or "the" are not to be construed as limiting, but rather as encompassing the plural, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that elements are included which are explicitly identified, that these elements do not form an exclusive list, and that a method or apparatus may comprise other steps or elements.

As shown in FIG. 1, the nacelle mounting assembly 10 may form part of a complete machine test apparatus 100 for an aircraft engine. The complete machine testing apparatus 100 may include two nacelle mounting assemblies 10. Two nacelle mounting assemblies 10 can respectively mount a double-sided nacelle (i.e., two single-sided nacelles 201) of the process nacelle 20 to the mounting frame 30. The complete machine test device 100 can perform a complete machine test run test of the aircraft engine.

For ease of description, the axial direction X0 of the process nacelle 20 is shown in FIGS. 1 and 2, and the axial direction X0 of the process nacelle 20 is also referred to as the horizontal axial direction of the aircraft engine. Fig. 2 is a partial schematic view showing a cross section taken perpendicular to the axial direction X0 in the vicinity of a position a1 in fig. 1. It is to be understood that the drawings are designed solely for purposes of illustration and not as an isometric definition, and should not be construed as limiting the scope of the invention as it is actually claimed.

The nacelle mounting assembly 10 comprises a guide rail 1, a screw 2, an adjustable member 3 and a movable member 4.

The guide rail 1 extends in an axial direction X0 and is arranged on the mounting frame 30. In the illustrated embodiment, the guide rail 1 may be a chute having a wide top and a narrow bottom. Further, in the illustrated embodiment, the cross section of the chute as an example of the guide rail 1 may be dovetail-shaped, which may also be referred to as an inverted trapezoid.

In the illustrated embodiment, the mounting bracket 30 may have a rib 302 protruding from the bottom surface 301 and extending in the axial direction X0, and the guide rail 1 may be provided to the rib 302. In fig. 2, the guide rail 1 may be a groove with a downward opening in the rib 302 and extending along the axial direction X0. It is to be understood that the variations of the different embodiments described herein may be combined as appropriate.

The screw 2 is rotatably mounted to the mounting bracket 30. The screw rod is also a straight rod with external threads and can be also called as a screw rod. For example, the mounting bracket 30 may provide a mounting seat 303, and the screw rod 2 may be mounted in a mounting hole of the mounting seat 303 through a rotary bearing, or the screw rod 2 may be mounted in a threaded hole of the mounting seat 303 through a threaded connection, so that the screw rod 2 can rotate relative to the mounting bracket 30.

In the illustrated embodiment, the screw 2 may be disposed at the side of the aforementioned rib 302, so that the entire nacelle mounting assembly 10 may be more compact in the vertical direction than if the screw 2 were disposed below the aforementioned rib 302.

The adjustable part 3 has a threaded portion 31 which is screwed to the screw spindle 2 and a sliding portion 32 which is in sliding engagement with the guide rail 1, whereby the adjustable part 3 is arranged to be axially position-adjustable by rotating the screw spindle 2. In the illustrated embodiment, the adjustable member 3 may have two prongs, one of which provides the threaded portion 31 and the other of which provides the sliding portion 32.

The mobile element 4 is arranged in sliding engagement with the guide rail 1 and is therefore slidable along the axial direction X0. As mentioned above, in the illustrated embodiment, the guide rail 1 may be a sliding groove, and accordingly, the adjustable member 3 and the movable member 4 may each have a sliding block adapted to the sliding groove. The adjustable element 3 and the movable element 4 are slidably engaged with the guide rail 1, so that in the illustrated embodiment, the adjustable element 3 can be referred to as a front slider and the movable element 4 can be referred to as a rear slider.

The adjustable piece 3 and the movable piece 4 are respectively hinged with different parts A1 and A2 of the unilateral nacelle 201 distributed along the axial direction X0, and the hinge axes are kept consistent. In other words, member 3 is hinged to a point a1 of nacelle 201, whereas member 4 is hinged to a point a2 of nacelle 201, point a1 and point a2 being spaced apart in axial direction X0, and the axis of articulation of point a1 and the axis of articulation of point a2 are coincident and are both axis of articulation C1.

In the nacelle mounting assembly 10, the screw rod 2 is rotated to adjust the axial position of the adjustable member 3, and the adjustable member 3 can drive the single-side nacelle 201 and the movable member 4 to slide along the axial direction X0, so that the axial position of the single-side nacelle 201 can be conveniently adjusted, for example, the axial V-groove structure 202 of the technical nacelle 20 fastened by the double-side nacelle and the V-groove structure of the fan casing (not shown) of the engine can be in the same cross section in the axial direction X0. Moreover, the adjustable piece 3 and the movable piece 4 can both slide along the axial direction X0, and are easy to align with two positions A1 and A2 of the single-side nacelle 201 respectively, so that the installation is more convenient and faster, and the installation method is also suitable for installation of a plurality of types of nacelles. In general, the mounting structure with high degree of freedom in the axial direction can reduce the machining precision requirement of the connecting structure of the technical nacelle and reduce the cost of the technical nacelle.

When the nacelle mounting assembly 10 is used for a complete machine test, the process nacelle 20 is heated and axially expanded in the test process, the expansion amount of the nacelle can be freely released because the moving part 4 is in an axial free state, and the contraction amount can be compensated by the movement of the moving part 4 when the nacelle is cooled and contracted.

In the illustrated embodiment, the adjustable element 3 and/or the movable element 4 can be hinged to the nacelle 201 on one side by means of a hinge bore. Further, in the illustrated embodiment, the nacelle 201 may be provided with a pair of lugs 203 at a position a1 corresponding to the adjustable member 3, and the pair of lugs 203 have a pair of insertion holes for the hinge shaft 53 to pass through. The through hole of the adjustable member 3 through which the hinge shaft 53 passes may be interposed between a pair of insertion holes provided by the lugs 203, that is, the portion of the adjustable member 3 through which the through hole is provided may be interposed between the portions of the pair of lugs 203 through which the insertion holes are provided. Similarly, in the illustrated embodiment, the nacelle 201 may be provided with a pair of lugs 204 at a position a2 corresponding to the movable member 4, and the pair of lugs 204 may have a pair of insertion holes for the hinge shaft 54 to pass through. The through hole of hinge shaft 54 of hinge member 4 may be interposed between a pair of insertion holes provided in lugs 204. The hinge shaft 53 may be called a hinge pin, and forms a hinge together with the insertion hole and the through hole which penetrate through the hinge pin.

Referring to fig. 2, the adjustable member 3 may be provided with a spherical bush 6, and the hinge shaft 53 may penetrate the spherical bush 6 and the one-sided nacelle 201 (specifically, the lug 203) to hinge the adjustable member 3 with the one-sided nacelle 201. Similarly, the moving member 4 may be provided with a spherical bush, and the hinge shaft 54 may penetrate the spherical bush and the one-side nacelle 201 (specifically, the lug 204) to hinge the moving member 4 with the one-side nacelle 201. The mounting holes of the adjustable part 3 and the movable part 4 are provided with spherical bushing structures, so that the requirement for processing the coaxiality of the through holes of the hinge shaft can be further reduced, the difficulty in mounting the hinge shaft is reduced, and the man-hour consumed by mounting the nacelle is reduced.

In one embodiment, the nacelle mounting assembly 10 may further include a screw driving structure, a locking structure, a stopping structure, a screw engaging/disengaging structure, or the like, which together with the screw 2 forms a screw adjusting mechanism, which together enable the mounting and axial positioning of the one-sided nacelle 201. The screw rod driving structure is, for example, a motor, and can drive the screw rod 2 to rotate or stop or lock. The screw rod engaging/disengaging structure may comprise, for example, two gears that can be engaged, one of which is connected to the screw rod 2, and the other of which can be driven by a motor to engage or disengage with the aforementioned gear, i.e., to engage or disengage the screw rod 2. The locking structure can be a locking screw, for example, and can lock the position of the screw rod 2 after the screw rod 2 rotates to a preset position. The stopping structure can be a clamping block for example, and the clamping block blocks the screw rod 2 when the screw rod 2 rotates to the stopping position, so that the screw rod 2 is prevented from rotating continuously. It can be understood that the screw rod 2 can also be rotated manually to match with a locking structure for position locking.

The nacelle mounting assembly 10 can only adopt a single adjustable part 3 and a single movable part 4, that is, the single-side nacelle 201 can be hinged and mounted only through two parts A1 and A2, so that the coaxiality of hinge holes of the two parts A1 and A2 can be ensured during processing and manufacturing, and compared with a structure in the prior art that three fixed hinges are used for connection, the processing requirement on the coaxiality can be reduced. That is, the coaxiality of all hinge shaft through holes of the single-side nacelle needs to be ensured during nacelle machining, and compared with the three fixed hinge connection structures of the existing nacelle, the machining requirement on the coaxiality of the hinge shaft through holes can be reduced by the mode that two hinges are fixedly connected.

In the illustrated complete machine testing apparatus 100, the guide rails 1 of the two nacelle mounting assemblies 10 may be arranged between the screw rods 2 of the two nacelle mounting assemblies 10. In other words, each nacelle mounting assembly 1 has one guide rail 1 and one lead screw 2, and thus, the two nacelle mounting assemblies 10 have two guide rails 1 and two lead screws 2, and the two lead screws 2 are located outside the two guide rails 1, which facilitates the rotation adjustment operation of the lead screws 2.

The nacelle mounting assembly can reduce the mounting difficulty of the technical nacelle, reduce the man-hour consumed by mounting the technical nacelle, and reduce the once-consumed man-hour to sixteen people per hour by average mounting and dismounting. Moreover, the nacelle assembly can ensure the release of the axial thermal expansion in the test process of the nacelle, and the service life of the nacelle is prolonged.

When the nacelle mounting assembly 10 is used for mounting, the distance between the adjustable piece 3 and the movable piece 4 and the direction of the spherical bushing 6 can be adjusted, and the mounting difficulty is reduced. The screw rod 2 is rotated, the technical nacelle 20 moves along the axial direction X0, so that the axial V-shaped groove structure 202 of the technical nacelle 20 and the V-shaped groove structure of the fan case of the engine are in the same section in the axial direction X0, and the adjustable part 3 is axially positioned by locking the screw rod 2 through a compression screw or a motor in a rotation stopping way.

By adjusting the distance between the adjustable piece and the movable piece of the nacelle mounting assembly, the technical nacelles of different models can be mounted on the appointed mounting frame. Through changing the guide rail of different length, above-mentioned nacelle installation component can adapt to different mounting brackets, and this can increase the ability of being suitable for of nacelle installation component to different engines and nacelle models, improves nacelle installation component's reuse rate, reduce cost.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention, all without departing from the content of the technical solution of the present invention, fall within the scope of protection defined by the claims of the present invention.

Claims (10)

1. A nacelle mounting assembly for mounting a single-sided nacelle of a process nacelle below a mounting frame, the process nacelle having an axial direction, the nacelle mounting assembly comprising:

the guide rail extends axially and is arranged on the mounting rack;

the screw rod is rotatably arranged on the mounting frame;

an adjustable member having a threaded portion threadedly coupled to the lead screw and a sliding portion slidably engaged with the guide rail, whereby the adjustable member is configured to be adjustable in axial position by rotating the lead screw; and

the movable piece is arranged to be in sliding fit with the guide rail;

the adjustable piece and the movable piece are respectively hinged with different parts of the single-side nacelle distributed along the axial direction, and the hinge axes are kept consistent.

2. A nacelle mounting assembly as in claim 1,

the guide rail is a sliding groove with a wide upper part and a narrow lower part;

the adjustable piece and the movable piece are respectively provided with a sliding block matched with the sliding groove.

3. A nacelle mounting assembly as in claim 2,

the cross section of the sliding groove is in a dovetail shape.

4. A nacelle mounting assembly as in claim 1,

the adjustable piece and/or the movable piece are/is hinged with the single-side nacelle through a hinge shaft perforation mode.

5. A nacelle mounting assembly as in claim 4,

the single-side nacelle is provided with a pair of lugs at the position corresponding to the adjustable piece and/or the movable piece, the pair of lugs are provided with a pair of insertion holes for the hinge shaft to pass through, and the through hole for the hinge shaft to pass through of the adjustable piece and/or the movable piece is arranged between the pair of insertion holes.

6. A nacelle mounting assembly as in claim 4,

the adjustable piece and/or the movable piece are/is provided with a spherical bushing, and a hinge shaft penetrates through the spherical bushing and the single-side nacelle to hinge the adjustable piece and/or the movable piece with the single-side nacelle.

7. A nacelle mounting assembly as in claim 1,

the mounting bracket is provided with a convex rib which protrudes from the bottom surface and axially extends, the guide rail is arranged on the convex rib, and the screw rod is arranged on the side edge of the convex rib.

8. A nacelle mounting assembly as in claim 1,

the adjustable member has two prongs, one of which provides the threaded portion and the other of which provides the sliding portion.

9. A complete machine testing device for an aircraft engine, comprising two nacelle mounting assemblies as claimed in any one of claims 1 to 8, the two nacelle mounting assemblies respectively mounting a double-sided nacelle of a process nacelle to a mounting bracket.

10. The complete machine testing device as set forth in claim 9, wherein the guide rails of the two nacelle mounting assemblies are arranged between the screw rods of the two nacelle mounting assemblies.

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