A fixed connection device for an aircraft engine breathing test device

Abstract

The present invention belongs to the technical field of aircraft engine test devices, and specifically relates to a fixed connection device for an aircraft engine gasping test device, which is used for connecting the engine and the gasping test device, and includes a connecting ring, an elastic gasket and a stop block. The present invention designs a fixed connection method and designs a new fixed connection structure, which can achieve a stable connection between the front end casing of the aircraft engine and the gasping test device, while ensuring the airtightness of the connection and enhancing the vibration resistance, avoiding disengagement during the gasping test and the entry of excess objects into the engine to damage the blades, and at the same time enhancing the effectiveness of the experiment.

Description

Technical Field

[0001] The invention belongs to the technical field of aero-engine experimental devices, and in particular relates to a fixing connection device for an aero-engine breathing test device. Background Art

[0002] During aeroengine gas flow tests, the secure connection between the gas flow test rig and the engine is crucial. During the test, the existing secure connection between the engine and the gas flow test rig resulted in the rig becoming detached from the engine, allowing debris to enter the engine and damage the blades, leading to test failure. Summary of the Invention

[0003] In view of this, the present invention proposes a fixed connection device for an aircraft engine breathing test device, designs a fixed connection method, and designs a new fixed connection structure, which can achieve a stable connection between the aircraft engine and the breathing test device.

[0004] In order to achieve the above technical objectives, the specific technical solutions adopted by the present invention are as follows:

[0005] A fixed connection device for an aero-engine breathing test device, used for connecting the front end casing of the engine and the breathing test device, comprising a connecting ring, an elastic washer and a stopper;

[0006] The front end casing is provided with a protruding casing retaining ring near the end opening; the breathing experiment device is provided with a protruding entrance retaining ring near the front end opening;

[0007] The elastic washer is simultaneously sleeved on the outer periphery of the end opening of the front casing and the outer periphery of the front opening of the breathing experiment device;

[0008] The connecting ring has an L-shaped radial cross-section and is sleeved on the outer periphery of the elastic washer; the connecting ring includes an axial end face parallel to the axial direction of the front end casing and a radial end face perpendicular to the axial direction of the front end casing; a portion of one end face of the elastic washer along the axial direction of the front end casing acts on the casing retaining ring, and the other end face of the elastic washer along the axial direction of the front end casing acts on the radial end face of the connecting ring;

[0009] The radial cross section of the stopper includes a first inner concave portion and a second inner concave portion that are continuous in sequence; the depth of the second inner concave portion is greater than that of the first inner concave portion; the other portion of the elastic washer along the axial end surface of the front end casing and the connecting ring are sleeved in the second inner concave portion, and the casing retaining ring is sleeved in the first inner concave portion;

[0010] Wherein: the radial end surface of the connecting ring is away from the elastic washer and presses against the inlet retaining ring based on the first force conduction; the end of the casing retaining ring is away from the elastic washer and presses against the side of the first recessed portion away from the elastic washer based on the second force conduction.

[0011] Furthermore, the fixed connection device also includes a first axial bolt arranged parallel to the axis of the front end casing; the first axial bolt passes through the connecting ring to reach the entrance retaining ring, and the first force transmission is achieved between the connecting ring and the entrance retaining ring based on the first axial bolt.

[0012] Furthermore, the fixed connection device also includes a second axial bolt arranged parallel to the axis of the front end casing; the second axial bolt passes through the stop block to reach the casing stop ring, and the second force transmission is realized between the stop block and the casing stop ring based on the second axial bolt.

[0013] Furthermore, the first axial bolt includes a first bolt rod, a spring and a nut;

[0014] The elastic washer is a hollow structure; the bolt head of the first bolt rod is arranged in the hollow structure of the elastic washer, and the rod portion of the first bolt rod passes through the elastic washer, the connecting ring and the entrance retaining ring; the bolt rod slides through the elastic washer and the connecting ring;

[0015] The spring is sleeved on the first bolt rod and is arranged between the connecting ring and the inlet retaining ring;

[0016] The nut is threadedly connected to the tail of the first bolt rod and is in close contact with the inlet retaining ring.

[0017] Furthermore, the second axial bolt includes a second bolt rod; the second bolt rod is threadedly connected to the stopper; and the second bolt rod passes through the casing retaining ring and abuts against the stopper.

[0018] Furthermore, the blocks are in multiple groups; the multiple blocks are evenly distributed along the central axis of the front end casing.

[0019] Furthermore, the fixed connection device also includes a radial bolt arranged perpendicular to the axis of the front end casing; the radial bolt passes through the stopper and is threadedly connected to the axial end face of the connecting ring; the radial bolt realizes the fixed connection between the stopper and the connecting ring.

[0020] Furthermore, the fixed connection device also includes a third axial bolt arranged parallel to the axis of the front end casing; the third axial bolt is threadedly installed on the radial end surface, and is used to support the stop block away from one end of the front end casing based on the bolt head.

[0021] By adopting the above technical solution, the present invention can bring the following beneficial effects:

[0022] The present invention ensures the airtightness of the connection between the front end casing and the gasping test device while enhancing the vibration resistance, avoiding disengagement during the gasping test and the entry of excess matter into the engine to damage the blades, thereby enhancing the effectiveness of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 This is an exploded isometric view of a fixing connection device for an aircraft engine breathing test device according to a specific embodiment of the present invention;

[0025] Figure 2 This is a cross-sectional view of a fixed connection device for an aircraft engine breathing test device in a specific embodiment of the present invention in a connected state;

[0026] Figure 3 This is an exploded front view of a fixing connection device for an aircraft engine breathing test device according to a specific embodiment of the present invention;

[0027] Figure 4 This is a schematic structural diagram of an elastic washer in a specific embodiment of the present invention;

[0028] Figure 5 This is a schematic structural diagram of a connecting ring in a specific embodiment of the present invention;

[0029] Figure 6 This is a schematic structural diagram of a stopper in a specific embodiment of the present invention;

[0030] Figure 7 This is a schematic structural diagram of a first axial bolt in a specific embodiment of the present invention;

[0031] Among them: 1. Front end casing; 11. Casing retaining ring; 2. Second axial bolt; 3. Radial bolt; 4. Stop block; 5. Elastic washer; 6. First axial bolt; 61. First bolt rod; 62. Spring; 63. Nut; 7. Connecting ring; 8. Third axial bolt; 9. Breathing test device; 91. Inlet retaining ring. DETAILED DESCRIPTION

[0032] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0033] The following describes the embodiments of the present disclosure through specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0034] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this disclosure, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0035] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present disclosure. The illustrations only show components related to the present disclosure and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0036] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples. However, one skilled in the art will appreciate that the aspects described can be practiced without these specific details.

[0037] In one embodiment of the present invention, a fixed connection device for an aircraft engine breathing test device is provided, which is used to connect the front end casing 1 of the engine and the breathing test device 9; Figure 1-7 As shown, it includes a connecting ring 7, an elastic washer 5 and a stopper 4;

[0038] The front end casing 1 of the engine is provided with a protruding casing retaining ring 11 near the end opening; the breathing experiment device 9 is provided with a protruding entrance retaining ring 91 near the front end opening;

[0039] The elastic washer 5 is simultaneously mounted on the outer periphery of the end opening of the front casing 1 and the outer periphery of the front opening of the breathing experiment device 9;

[0040] The connecting ring 7 has an L-shaped radial cross-section and is sleeved on the outer periphery of the elastic washer 5. The connecting ring 7 includes an axial end face parallel to the axial direction of the front end casing 1 and a radial end face perpendicular to the axial direction of the front end casing 1. A portion of one end face of the elastic washer 5 along the axial direction of the front end casing 1 acts on the casing retaining ring 11, and the other end face of the elastic washer 5 along the axial direction of the front end casing 1 acts on the radial end face of the connecting ring 7.

[0041] The radial cross section of the stopper 4 includes a first inner concave portion and a second inner concave portion that are continuous in sequence; the depth of the second inner concave portion is greater than that of the first inner concave portion; the other portion of the elastic washer 5 along the axial end surface of the front end casing 1 and the connecting ring 7 are mounted in the second inner concave portion, and the casing retaining ring 11 is mounted in the first inner concave portion;

[0042] Among them: the radial end face of the connecting ring 7 away from the elastic washer 5 is pressed against the inlet retaining ring 91 based on the first force conduction; the end of the casing retaining ring 11 away from the elastic washer 5 is pressed against the side of the first inner recess away from the elastic washer 5 based on the second force conduction.

[0043] This embodiment is based on the elastic gasket 5 sealing the connection between the front end casing 1 and the breathing test device 9. The connection between the front end casing 1 and the breathing test device 9 is cylindrical, has the same structure and is coaxially arranged. Figure 1 As shown, a casing retaining ring 11 and an entrance retaining ring 91 are respectively provided near the opening, which are annular and perpendicular to the axial direction of the front end casing 1; the connecting ring 7 of this embodiment seals the elastic gasket 5 and presses it against the casing retaining ring 11, and at the same time acts on the entrance retaining ring 91, so as to achieve the buffering of the axial movement between the front end casing 1 and the breathing experiment device 9; the block 4 of this embodiment limits the axial displacement of the connecting ring 7 through a concave cavity, and then partially limits the axial displacement of the elastic gasket 5, thereby preventing the elastic gasket 5 from falling out while ensuring the vibration damping effect; at the same time, the block 4 also acts on the casing retaining ring 11, and finally uses the casing retaining ring 11 as the initial force point to prevent the elastic gasket 5 from falling out.

[0044] In this embodiment, if Figure 2 As shown, the fixed connection device also includes a first axial bolt 6 arranged parallel to the axis of the front end casing 1; the first axial bolt 6 passes through the connecting ring 7 to reach the entrance retaining ring 91, and the first force transmission is realized between the connecting ring 7 and the entrance retaining ring 91 based on the first axial bolt 6.

[0045] In this embodiment, the fixed connection device also includes a second axial bolt 2 arranged parallel to the axis of the front end casing 1; the second axial bolt 2 passes through the stop block 4 to reach the casing stop ring 11, and the second force transmission is realized between the stop block 4 and the casing stop ring 11 based on the second axial bolt 2.

[0046] In this embodiment, there are multiple groups of first axial bolts 6, and the multiple groups of first axial bolts 6 are centrally symmetrically distributed around the central axis of the front end casing 1; there are multiple groups of second axial bolts 2, and the multiple groups of second axial bolts 2 are centrally symmetrically distributed around the central axis of the front end casing 1.

[0047] In one embodiment, Figure 7 As shown, the first axial bolt 6 includes a first bolt rod 61, a spring 62 and a nut 63;

[0048] The elastic washer 5 is a hollow structure; the bolt head of the first bolt rod 61 is arranged in the hollow structure of the elastic washer 5, and the rod portion of the first bolt rod 61 passes through the elastic washer 5, the connecting ring 7 and the entrance retaining ring 91; the bolt rod slides through the elastic washer 5 and the connecting ring 7;

[0049] The spring 62 is sleeved on the first bolt rod 61 and is arranged between the connecting ring 7 and the entrance retaining ring 91;

[0050] The nut 63 is threadedly connected to the tail end of the first bolt rod 61 and is in close contact with the inlet retaining ring 91 .

[0051] In this embodiment, the rod portion of the first bolt rod 61 can slide through the elastic washer 5, the connecting ring 7, and the entrance retaining ring, ultimately connecting with the nut 63. Under the action of the spring 62, the nut 63 can be tightened and tightly contacted with the entrance retaining ring 91. The spring 62 of this embodiment also buffers the mutual axial vibration between the front end casing 1 and the breathing test device 9, further improving the anti-vibration performance.

[0052] In this embodiment, there are multiple groups of first axial bolts 6 , and the multiple groups of first axial bolts 6 are centrally symmetrically distributed about the central axis of the front end casing 1 .

[0053] In this embodiment, if Figure 2 As shown, the second axial bolt 2 includes a second bolt rod; the second bolt rod is threadedly connected to the stopper 4; the second bolt rod passes through the casing stop ring 11 and abuts against the stopper 4.

[0054] The function of the second axial bolt 2 in this embodiment is to ensure that the elastic washer 5 in the second inner recess can be in close contact with the casing retaining ring 11.

[0055] In this embodiment, in order to facilitate engineering installation, Figure 1 As shown, there are multiple groups of blocks 4; each block 4 is centrally symmetrical about the central axis of the front end casing 1.

[0056] In this embodiment, the fixing and connecting device further comprises radial bolts 3 arranged perpendicular to the axis of the front end casing 1; the radial bolts 3 pass through the stopper 4 and are threadedly connected to the axial end surface of the connecting ring 7; the radial bolts 3 securely connect the stopper 4 to the connecting ring 7. In this embodiment, multiple sets of radial bolts 3 are provided, the specific number of which is not limited in this embodiment; these multiple sets of radial bolts 3 securely secure the connecting ring 7 to the stopper 4.

[0057] In one embodiment, the fixing connection device further comprises a third axial bolt 8 arranged parallel to the axis of the front end casing 1; the third axial bolt 8 is threadedly mounted on the radial end surface, such as Figure 2 As shown, it is used to support the end of the stopper 4 away from the front end casing 1 based on the bolt head. The third axial bolt 8 of this embodiment radially constrains the stopper 4 to prevent the stopper 4 from generating relative displacement.

[0058] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure 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 disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A fixed connection device for an aircraft engine gasping test device, used for connecting the front end casing (1) of the engine and the gasping test device (9); characterized in that: It comprises a connecting ring (7), an elastic washer (5) and a stopper (4); The front end casing (1) is provided with a protruding casing retaining ring (11) near the end opening; the breathing test device (9) is provided with a protruding entrance retaining ring (91) near the front end opening; The elastic washer (5) is simultaneously sleeved on the outer periphery of the end opening of the front end casing (1) and the outer periphery of the front end opening of the breathing test device (9); The radial cross section of the connecting ring (7) is L-shaped and is sleeved on the outer periphery of the elastic washer (5); the connecting ring (7) includes an axial end face parallel to the axial direction of the front end casing (1) and a radial end face arranged perpendicular to the axial direction of the front end casing (1); a portion of an end face of the elastic washer (5) along the axial direction of the front end casing (1) acts on the casing retaining ring (11), and the other end face of the elastic washer (5) along the axial direction of the front end casing (1) acts on the radial end face of the connecting ring (7); The radial cross section of the stopper (4) comprises a first inner concave portion and a second inner concave portion which are continuous in sequence; the depth of the second inner concave portion is greater than that of the first inner concave portion; the other part of the elastic washer (5) along an axial end surface of the front end casing (1) and the connecting ring (7) are sleeved in the second inner concave portion, and the casing retaining ring (11) is sleeved in the first inner concave portion; Wherein: the radial end surface of the connecting ring (7) away from the elastic washer (5) is pressed against the inlet retaining ring (91) based on the first force transmission; the end of the casing retaining ring (11) away from the elastic washer (5) is pressed against the side of the first inner recess away from the elastic washer (5) based on the second force transmission.

2. The fixed connection device according to claim 1, characterized in that: The fixed connection device also includes a first axial bolt (6) arranged parallel to the axis of the front end casing (1); the first axial bolt (6) passes through the connecting ring (7) and reaches the entrance retaining ring (91), and the first force transmission is achieved between the connecting ring (7) and the entrance retaining ring (91) based on the first axial bolt (6).

3. The fixed connection device according to claim 1, characterized in that: The fixed connection device also includes a second axial bolt (2) arranged parallel to the axis of the front end casing (1); the second axial bolt (2) passes through the stopper (4) and reaches the casing retaining ring (11), and the second force transmission is achieved between the stopper (4) and the casing retaining ring (11) based on the second axial bolt (2).

4. The fixed connection device according to claim 2, characterized in that: The first axial bolt (6) comprises a first bolt rod (61), a spring (62) and a nut (63); The elastic washer (5) is a hollow structure; the bolt head of the first bolt rod (61) is arranged in the hollow structure of the elastic washer (5); the rod portion of the first bolt rod (61) passes through the elastic washer (5), the connecting ring (7) and the entrance retaining ring (91); the bolt rod slides through the elastic washer (5) and the connecting ring (7); The spring (62) is sleeved on the first bolt rod (61) and is arranged between the connecting ring (7) and the inlet retaining ring (91); The nut (63) is threadedly connected to the tail of the first bolt rod (61) and is in close contact with the inlet retaining ring (91).

5. The fixed connection device according to claim 3, characterized in that: The second axial bolt (2) comprises a second bolt rod; the second bolt rod is threadedly connected to the stopper (4); the second bolt rod passes through the casing stop ring (11) and abuts against the stopper (4).

6. The fixed connection device according to claim 1, characterized in that: The stoppers (4) are in multiple groups; the multiple stoppers (4) are evenly distributed along the central axis of the front end casing (1).

7. The fixed connection device according to claim 1, characterized in that: The fixed connection device also includes a radial bolt (3) arranged perpendicular to the axis of the front end casing (1); the radial bolt (3) passes through the stopper (4) and is threadedly connected to the axial end surface of the connecting ring (7); the radial bolt (3) realizes the fixed connection between the stopper (4) and the connecting ring (7).

8. The fixed connection device according to claim 1, characterized in that: The fixed connection device also includes a third axial bolt (8) arranged parallel to the axis of the front end casing (1); the third axial bolt (8) is threadedly mounted on the radial end surface and is used to support the end of the stopper (4) away from the front end casing (1) based on the bolt head.

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