Multipath fulcrum load combined loading device for intermediate case

Abstract

The invention belongs to the technical field of aero-engines, and particularly relates to an intermediate case multi-path fulcrum load combined loading device, which combines two fulcrum radial loads into one path for loading through loading assemblies such as a loading cylinder and the like, realizes loading of two section radial loads by one path of load, reduces the number of tool processing parts, and shortens the test assembly time; the height of the loading point can be adjusted through the displacement adjusting assembly, so that the stress distribution of the radial force of the two fulcrums is adjusted, and the structure can adapt to various working condition tests; the novel axial force loading assembly can apply two fulcrum axial forces at the same time and does not interfere with the radial load loading assembly.

Description

Technical Field

[0001] The present application belongs to the field of aero-engine technology, and in particular relates to a multi-point load combined loading device for an intermediate casing. Background Art

[0002] The intermediate casing is a critical load-bearing component of an aircraft engine. Located between the low-pressure and high-pressure compressors, it connects the inner and outer ducts of a turbofan engine and is responsible for distributing the ratio of the inner and outer ducts. Furthermore, the engine's center and intermediate fulcrums, as well as the main mounting joints, are typically located on the intermediate casing, playing a crucial role in supporting and securing the engine.

[0003] When conducting a strength test on a certain model of intermediate casing, the rear mounting edge of the casing transition section connected to the mounting edge of the intermediate casing diverter ring will be constrained, and loads will be applied to the 2-point and 3-point mounting sections and the mounting edge section of the intermediate casing respectively. The load types are mainly: axial and radial loads on the mounting section, radial and torque loads on the mounting edge section, and axial and radial loads on the supports.

[0004] The existing similar technology is a strength test device for the intermediate casing of a large bypass ratio aircraft engine. The radial forces of the fulcrums are all loaded through levers. For axial forces, the second fulcrum cannot be loaded, and the third fulcrum is applied through a conventional actuator-force sensor loading unit.

[0005] The existing test methods have the following three shortcomings:

[0006] 1. The two fulcrums are loaded separately, lacking load synthesis and simplification. There are multiple loading channels, making load control difficult and prone to load interference, making loading impossible.

[0007] 2. Three-point radial load loading requires drilling holes in the restraint device, which reduces its load-bearing capacity and increases test risks. Furthermore, installation requires limited space, making assembly more difficult.

[0008] 3. The two-point loading structure can only apply radial loads but not axial loads. Summary of the Invention

[0009] In order to solve the above problems, the present application provides an intermediate casing multi-point load joint loading device, comprising:

[0010] The test pieces have two or three fulcrums, both of which have inner cylindrical surfaces for mounting bearings, and both inner cylindrical surfaces have annular grooves for bearing axial forces;

[0011] A restraining device fixes the test piece on the basic platform, wherein the three supporting points are located below the second supporting point;

[0012] A simulated two-pivot bearing has an outer cylindrical surface sleeved on the inner cylindrical surface of the two pivots, and a ring platform on the outer cylindrical surface is embedded in the ring groove;

[0013] A two-pivot axial force loading assembly, one end of which is fixed to the top support member and the other end is connected to the simulated two-pivot bearing;

[0014] The simulated three-point bearing is cylindrical and has an inner cylindrical surface and an outer cylindrical surface sleeved on the inner cylindrical surface of the three-point bearing, and the outer cylindrical surface has a ring platform embedded in the ring groove;

[0015] A three-point axial loading assembly, one end of which is fixed to the base platform and the other end is connected to the simulated three-point bearing;

[0016] The loading cylinder has two ends respectively sleeved on the inner cylindrical surfaces of the simulated three-point bearing and the simulated two-point bearing, wherein at least one end is in a sliding sleeve connection;

[0017] The loading shaft has its lower end sleeved on the loading cylinder and its upper end hung on the top support;

[0018] A radial force balancing assembly, both ends of which are located in the same horizontal plane, one end of which is connected to the loading shaft and the other end of which is horizontally fixed to the side support member;

[0019] The two- and three-point radial force loading components have their two ends located in the same horizontal plane, are at different heights from the radial force balancing components and are arranged opposite each other, one end is connected to the loading shaft, and the other end is horizontally fixed to the side support.

[0020] Preferably, the two-point axial force loading assembly and the three-point axial force loading assembly both include an actuating cylinder and a force sensor installed on an actuating shaft of the actuating cylinder.

[0021] Preferably, one end of the loading shaft is radially protruded to form a radial ring platform, and the radial ring platform is sleeved on the inner cylindrical wall surface of the loading cylinder for applying a radial load.

[0022] Preferably, the loading shaft is hoisted on the top support frame through a displacement adjustment assembly.

[0023] Preferably, the loading shaft is height-adjustable in the loading cylinder through a displacement adjustment assembly and a sliding pair to distribute the magnitude of the radial force load applied to the two-point support and the three-point support.

[0024] Preferably, the displacement adjustment component includes a hinge wheel wire rope kit or a forward and reverse threaded sleeve.

[0025] Preferably, the displacement adjustment assembly includes a double-ear structure fixed on the top support frame and a single-ear structure connected to the loading shaft. The double-ear structure has multiple ear holes of different heights. The single-ear structure is connected to single-ear structures of different heights through pins to achieve height adjustment of the loading shaft.

[0026] Advantages of this application include:

[0027] 1. The radial loads of the two fulcrums are combined into one load through loading components such as loading cylinders, so that the radial loads of two sections can be loaded in one load, which reduces the number of tooling parts and shortens the test assembly time;

[0028] 2. The height of the loading point can be adjusted through the displacement adjustment component, thereby adjusting the force distribution of the radial force of the two fulcrums, making the structure adaptable to various working condition tests;

[0029] 3. The new axial force loading component can apply axial forces at two fulcrums at the same time without interfering with the radial load loading component. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of a test device according to a preferred embodiment of the present application.

[0031] Figure 2 This is an enlarged view of the local connection between the second and third fulcrums of the test device.

[0032] Figure 3 This is a simplified diagram of the structure of a certain type of intermediate casing. DETAILED DESCRIPTION

[0033] To make the technical solution and its advantages of the present application clearer, the technical solution of the present application will be described in further detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of the present application and are only used to explain the present application, not to limit the present application. It should be noted that, for ease of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0034] In addition, it should be noted that, unless otherwise clearly stipulated and limited, the words "install", "connect", "connect" and similar terms used in the description of this application should be understood in a broad sense. For example, the connection 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, an indirect connection through an intermediate medium, or a connection between two components. Technical personnel in the field can understand their specific meanings in this application according to the specific circumstances.

[0035] like Figure 1 As shown, a multi-point load joint loading device for an intermediate casing includes:

[0036] Test piece 3, such as Figure 3As shown, there are two fulcrums and three fulcrums, both of which have inner cylindrical surfaces for mounting bearings, and the inner cylindrical surfaces have annular grooves for bearing axial forces; fulcrum loads: two-fulcrum loads: axial force R2x, radial force R2yz; three-fulcrum loads: axial force R3x, radial force R3yz,

[0037] The restraint device 1 fixes the test piece 3 on the base platform, and the three supporting points are located below the second supporting point;

[0038] The simulated two-pivot bearing 7 has an outer cylindrical surface sleeved on the inner cylindrical surface of the two fulcrums, and a ring platform on the outer cylindrical surface is embedded in the ring groove;

[0039] A two-pivot axial force loading assembly 8, one end of which is fixed to the top support member and the other end is connected to the simulated two-pivot bearing 7;

[0040] The simulated three-point bearing 4 is cylindrical and has an inner cylindrical surface and an outer cylindrical surface sleeved on the inner cylindrical surface of the three-point bearing, and the outer cylindrical surface has a ring platform embedded in the ring groove;

[0041] A three-point axial loading assembly 2, one end of which is fixed to the base platform and the other end is connected to the simulated three-point bearing 4;

[0042] The loading cylinder 5 has two ends respectively sleeved on the inner cylindrical surfaces of the simulated three-point bearing 4 and the simulated two-point bearing 7, wherein at least one end is in a sliding sleeve connection;

[0043] The loading shaft 6 has its lower end sleeved on the loading cylinder 5 and its upper end hung on the top support;

[0044] The radial force balancing assembly 11 has two ends located in the same horizontal plane, one end is connected to the loading shaft 6, and the other end is horizontally fixed to the side support member;

[0045] The two- and three-point radial force loading assembly 9 has its two ends located in the same horizontal plane, at different heights from the radial force balancing assembly 11 and arranged opposite to each other, one end of which is connected to the loading shaft 6 and the other end of which is horizontally fixed to the side support.

[0046] Preferably, both the two-point axial force loading assembly 8 and the three-point axial force loading assembly 2 include an actuating cylinder and a force sensor installed on an actuating shaft of the actuating cylinder.

[0047] Preferably, one end of the loading shaft 6 is radially protruded to form a radial ring platform, and the radial ring platform is sleeved on the inner cylindrical wall surface of the loading cylinder 5 for applying a radial load.

[0048] Preferably, the loading shaft 6 is hoisted on the top support frame through a displacement adjustment assembly.

[0049] Preferably, the loading shaft 6 is height-adjustable in the loading cylinder 5 through a displacement adjustment assembly and a sliding pair to distribute the magnitude of the radial force load applied to the two-point support and the three-point support.

[0050] Preferably, the displacement adjustment component includes a hinge wheel wire rope kit or a forward and reverse threaded sleeve, specifically, connected by a sleeve with an external thread and a sleeve with an internal thread.

[0051] Preferably, the displacement adjustment assembly includes a double-ear structure fixed to the top support frame and a single-ear structure connected to the loading shaft 6. The double-ear structure has multiple ear holes of different heights. The single-ear structure is connected to the single-ear structures of different heights by pins to achieve height adjustment of the loading shaft 6. During installation,

[0052] a) Restraint: This device simulates a high-pressure compressor casing. Its lower portion is secured to the base platform with T-bolts, and its upper portion is connected to the engine mounting edge with engine bolts. Through structural optimization, its stiffness is kept close to that of a high-pressure compressor casing within a certain range, while still meeting the load capacity.

[0053] b) Support radial force loading method:

[0054] The radial forces at the second and third fulcrums are applied by the loading rod and combined into one load through the loading cylinder. The displacement adjustment assembly can adjust the axial displacement of the loading rod, thereby adjusting the force distribution of the radial forces at the second and third fulcrums.

[0055] c) Fulcrum axial force loading method:

[0056] The lower mounting edge of the two-point axial force loading cylinder is fixed to the simulated two-point bearing, and the upper mounting edge of the two-point axial force loading cylinder is connected to the universal force loading unit; the upper mounting edge of the three-point axial force loading cylinder is fixed to the simulated three-point bearing, and the lower mounting edge of the three-point axial force loading cylinder is connected to the universal force loading unit; the load is applied through the actuator cylinder, and the size is fed back through the force sensor.

[0057] The present invention combines the radial loads of two fulcrums into one load through a loading assembly such as a loading cylinder, thereby achieving one load to load two cross-section radial loads, reducing the number of tooling parts and shortening the test assembly time.

[0058] 2. The height of the loading point can be adjusted through the displacement adjustment component, thereby adjusting the force distribution of the radial force of the two fulcrums, making the structure adaptable to various working condition tests;

[0059] 3. The new axial force loading component can apply axial forces at two fulcrums at the same time without interfering with the radial load loading component.

[0060] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A multi-point load joint loading device for an intermediate casing, characterized in that: include: The test piece (3) has two fulcrums and three fulcrums, both of which have inner cylindrical surfaces for mounting bearings, and both of which have annular grooves for bearing axial forces; A restraining device (1) fixes the test piece (3) on a base platform, wherein the three supporting points are located below the second supporting point; A simulated two-pivot bearing (7) has an outer cylindrical surface sleeved on the inner cylindrical surfaces of the two fulcrums, and a ring platform embedded in the ring groove on the outer cylindrical surface; A two-pivot axial force loading assembly (8), one end of which is fixed to the top support member and the other end of which is connected to the simulated two-pivot bearing (7); The simulated three-point bearing (4) is cylindrical and has an inner cylindrical surface and an outer cylindrical surface sleeved on the inner cylindrical surface of the three-point bearing, and the outer cylindrical surface has a ring platform embedded in the ring groove; A three-point axial loading assembly (2), one end of which is fixed to the base platform and the other end is connected to the simulated three-point bearing (4); The loading cylinder (5) has two ends respectively sleeved on the inner cylindrical surfaces of the simulated three-point bearing (4) and the simulated two-point bearing (7), wherein at least one end is in a sliding sleeve connection; The loading shaft (6) has its lower end sleeved on the loading cylinder (5) and its upper end hung on the top support member; A radial force balancing component (11), both ends of which are located in the same horizontal plane, one end of which is connected to the loading shaft (6) and the other end of which is horizontally fixed to the side support member; The two or three-point radial force loading assembly (9) has two ends located in the same horizontal plane, and is at a different height from the radial force balancing assembly (11) and arranged opposite to each other. One end is connected to the loading shaft (6), and the other end is horizontally fixed to the side support member.

2. The intermediate casing multi-point load combined loading device according to claim 1, characterized in that: The two-point axial force loading assembly (8) and the three-point axial force loading assembly (2) both include an actuating cylinder and a force sensor mounted on an actuating shaft of the actuating cylinder.

3. The intermediate casing multi-point load combined loading device according to claim 1, characterized in that: One end of the loading shaft (6) is radially protruded to form a radial ring platform, which is sleeved on the inner cylindrical wall surface of the loading cylinder (5) and is used to apply a radial load.

4. The multi-point load combined loading device for an intermediate casing as claimed in claim 3, characterized in that: The loading shaft (6) is hoisted on the top support frame through a displacement adjustment component.

5. The multi-point load combined loading device for an intermediate casing as claimed in claim 4, characterized in that: The loading shaft (6) is height-adjustable in the loading cylinder (5) through a displacement adjustment component and a sliding pair, so as to distribute the magnitude of the radial force load applied to the two supporting points and the three supporting points.

6. The multi-point load combined loading device for an intermediate casing according to claim 5, characterized in that: The displacement adjustment assembly includes a hinge wheel wire rope kit or a forward and reverse threaded sleeve.

7. The intermediate casing multi-point load combined loading device according to claim 5, characterized in that: The displacement adjustment component comprises a double-ear structure fixed on the top support frame and a single-ear structure connected to the loading shaft (6); the double-ear structure has a plurality of ear holes at different heights; the single-ear structure is connected to single-ear structures at different heights via a pin to achieve height adjustment of the loading shaft (6).

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