Quick detachable joint for an aeroengine test cell ejection duct

Abstract

The utility model discloses a quick detachable joint for aero-engine test bed injection cylinder belongs to aero-engine test bed exhaust detection and test technical field, to solve the problem of the poor detection accuracy caused by the exhaust sampling position deviation of aero-engine test bed injection cylinder in the prior art. The quick detachable joint of the utility model includes internal gas pipe, connecting pipe and external gas pipe, the side wall of the injection cylinder is provided with detection hole, one end of the connecting pipe is sealingly and fixedly connected with the detection hole, the other end of the connecting pipe is provided with connecting flange, one end of the internal gas pipe penetrates the connecting pipe and detection hole and extends to the injection cylinder, the other end of the internal gas pipe is provided with first end flange, one end of the external gas pipe is connected with detection equipment, the other end of the external gas pipe is provided with second end flange, and the connecting flange, first end flange and second end flange are detachably connected. The utility model can be used for aero-engine test bed exhaust detection and test.

Description

Technical Field

[0001] This utility model belongs to the field of exhaust gas detection and testing technology for aero-engine test benches, and particularly relates to a quick-release connector for the ejector tube of an aero-engine test bench. Background Technology

[0002] Gas pipelines are one of the main components used for gas transportation. In order to detect the fluid inside the gas pipeline, it is usually necessary to make holes in the pipeline wall and extract a certain amount of gas.

[0003] However, for the ejector tube of the aero-engine test stand, due to its large size, usually more than 3m in diameter, the exhaust gas flows along the axial direction of the ejector tube. The exhaust gas flow is weaker near the wall, and the temperature and concentration are significantly different from those at the axial position of the ejector tube. This makes it impossible for the extracted exhaust gas to accurately reflect the real situation. Utility Model Content

[0004] Based on the above analysis, this utility model aims to provide a quick-release connector for the ejector tube of an aero-engine test stand, in order to solve the problem of poor detection accuracy caused by the deviation of the exhaust gas sampling position of the ejector tube of the aero-engine test stand in the prior art.

[0005] The purpose of this utility model is mainly achieved through the following technical solutions.

[0006] This utility model provides a quick-release connector for an ejector tube on an aero-engine test stand, including an internal air bleed pipe, a connecting pipe, and an external air bleed pipe;

[0007] An inspection hole is provided on the side wall of the ejector tube. One end of the connecting pipe is sealed and fixedly connected to the inspection hole, and the other end of the connecting pipe is provided with a connecting flange.

[0008] One end of the internal air intake tube passes through the connecting tube and the detection hole and extends into the ejector tube, while the other end of the internal air intake tube is provided with a first end flange.

[0009] One end of the external air intake pipe is connected to the testing equipment, and the other end of the external air intake pipe is equipped with a second end flange.

[0010] Furthermore, the quick-release connector also includes a reinforcing plate fitted onto the outer wall of the connecting pipe.

[0011] Furthermore, the quick-release connector also includes a reinforcing rib, which is located at the corner where the reinforcing plate and the connecting pipe are connected, and the reinforcing rib, the reinforcing plate and the connecting pipe are fixedly connected.

[0012] Furthermore, there are multiple internal air intake tubes, each with a different length.

[0013] Furthermore, the quick-release connector also includes an air intake bend, one end of which is fixedly connected to the internal air intake pipe, and the other end of which is oriented along the axial direction of the ejector tube and toward the direction of exhaust gas flow.

[0014] Furthermore, the internal air intake tube is arranged radially along the ejector tube, and the curvature of the bend is 90°.

[0015] Furthermore, the quick-release connector also includes an extension tube, one end of which is fixedly connected to the drainage bend.

[0016] Furthermore, the extension pipe is a straight pipe.

[0017] Furthermore, the extension pipe includes a horizontal straight pipe section, a first bend pipe section, a vertical straight pipe section, and a second bend pipe section that are connected in sequence to the drainage bend pipe.

[0018] Furthermore, the quick-release connector also includes a flow regulating valve located on the external air intake pipe.

[0019] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0020] A) The quick-release connector for the ejector tube of an aero-engine test stand provided by this utility model can flexibly adjust the exhaust gas extraction position by setting the internal and external air bleed pipes, avoiding the deviation caused by sampling only near the wall of the ejector tube, thereby more accurately reflecting the actual exhaust gas situation inside the ejector tube of the aero-engine test stand.

[0021] B) The quick-release connector for the ejector tube of the aero-engine test stand provided by this utility model adopts a detachable flange structure, which makes the entire connector assembly and disassembly process more convenient and faster, without the need for large-scale disassembly or modification of the ejector tube, greatly improving work efficiency and reducing maintenance costs.

[0022] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the embodiments described and the accompanying drawings, which are particularly pointed out. Attached Figure Description

[0023] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0024] Figure 1A schematic diagram of the structure of the quick-release connector for the ejector tube of an aero-engine test stand provided in Embodiment 1 of this utility model;

[0025] Figure 2 A schematic diagram showing the connection between the quick-release connector and the ejector tube for an aero-engine test stand provided in Embodiment 1 of this utility model.

[0026] Figure 3 A bottom view of the quick-release connector for the ejector tube of an aero-engine test stand provided in Embodiment 1 of this utility model.

[0027] Figure 4a A schematic diagram showing the radially adjustable exhaust gas collection point of the quick-release connector for the ejector tube of an aero-engine test stand provided in Embodiment 1 of this utility model.

[0028] Figure 4b A schematic diagram showing the axially adjustable exhaust gas collection point of the quick-release connector for the ejector tube of an aero-engine test stand provided in Embodiment 1 of this utility model.

[0029] Figure 4c This is a schematic diagram showing that the exhaust gas collection point of the quick-release connector for the ejector tube of an aero-engine test stand is radially and axially adjustable, as provided in Embodiment 1 of this utility model.

[0030] Figure label:

[0031] 1-Internal air intake pipe; 2-Connecting pipe; 3-External air intake pipe; 4-Ejector tube; 5-Connecting flange; 6-First end flange; 7-Second end flange; 8-Reinforcing plate; 9-Reinforcing rib; 10-Air intake bend; 11-Straight pipe; 12-Horizontal straight pipe section; 13-First bend section; 14-Vertical straight pipe section; 15-Second bend section; 16-Flow regulating valve. Detailed Implementation

[0032] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0033] Example 1

[0034] This embodiment provides a quick-release connector for the ejector tube 4 of an aero-engine test stand. See [link / reference]. Figures 1 to 3 It includes an internal air intake tube 1, a connecting tube 2, and an external air intake tube 3.

[0035] The ejector tube 4 has a detection hole on its side wall. One end of the connecting pipe 2 is sealed and fixedly connected to the detection hole (e.g., by welding), and the other end is provided with a connecting flange 5.

[0036] One end of the internal air intake pipe 1 passes through the connecting pipe 2 and the detection hole and extends into the ejector tube 4, while the other end of the internal air intake pipe 1 is provided with a first end flange 6.

[0037] One end of the external air intake pipe 3 is connected to the detection equipment, and the other end is equipped with a second end flange 7.

[0038] The connecting flange 5, the first end flange 6, and the second end flange 7 are detachably connected, thereby connecting the internal air intake pipe 1, the connecting pipe 2, and the external air intake pipe 3 into a whole.

[0039] Compared with the prior art, the quick-release connector for the ejector tube 4 of the aero-engine test stand provided in this embodiment can, on the one hand, flexibly adjust the exhaust gas extraction position by setting the internal air bleed pipe 1 and the external air bleed pipe 3, avoiding the deviation caused by sampling only near the wall of the ejector tube 4, thereby more accurately reflecting the actual exhaust gas situation inside the ejector tube 4 of the aero-engine test stand.

[0040] On the other hand, the use of a detachable flange structure makes the entire joint assembly and disassembly process more convenient and faster, eliminating the need for large-scale disassembly or modification of the ejector tube 4, which greatly improves work efficiency and reduces maintenance costs.

[0041] To improve the structural strength of the connecting pipe 2 and reduce the overall swaying of the internal air bleed pipe 1, connecting pipe 2, and external air bleed pipe 3, the quick-release connector for the ejector tube 4 of the aero-engine test stand also includes a reinforcing plate 8 sleeved on the outer wall of the connecting pipe 2. By adding the reinforcing plate 8, the connecting pipe 2's ability to resist external deformation is effectively enhanced. During exhaust gas extraction, even if the internal air bleed pipe 1 is subjected to the impact of airflow, the connecting pipe 2 can maintain a stable structure, reducing overall swaying and ensuring the stability and accuracy of exhaust gas extraction. At the same time, the reinforcing plate 8 also extends the service life of the connecting pipe 2, reduces the risk of damage to the connecting pipe 2 due to frequent swaying, and further improves the reliability and durability of the quick-release connector.

[0042] To further enhance the structural strength of the connecting pipe 2, the quick-release connector for the ejector tube 4 of the aero-engine test stand also includes a reinforcing rib 9. The reinforcing rib 9 is located at the corner where the reinforcing plate 8 connects to the connecting pipe 2, and the reinforcing rib 9, reinforcing plate 8, and connecting pipe 2 are fixedly connected (e.g., welded). Thus, by providing the reinforcing rib 9, a more stable support structure is formed at the connection point between the reinforcing plate 8 and the connecting pipe 2, effectively dispersing the external forces borne by the connecting pipe 2 and preventing structural damage caused by stress concentration. Furthermore, the reinforcing rib 9 not only enhances the deformation resistance of the connecting pipe 2 at the corner but also works synergistically with the reinforcing plate 8 to improve the overall structural rigidity of the connector, ensuring stable performance even under complex operating conditions.

[0043] To ensure smooth introduction of exhaust gas into the internal bleed pipe 1, the quick-release connector for the ejector tube 4 of the aero-engine test stand also includes an bleed pipe bend 10. One end of the bleed pipe bend 10 is fixedly connected to the internal bleed pipe 1, while the other end is oriented along the axial direction of the ejector tube 4 and towards the direction of exhaust gas flow. This design of the bleed pipe bend 10 allows the exhaust gas to flow more smoothly along the axial direction of the ejector tube 4 into the internal bleed pipe 1, avoiding turbulence and backflow during the entry process, thus ensuring the smoothness and continuity of exhaust gas extraction. The special design of the bleed pipe bend 10 allows it to better adapt to the airflow environment inside the ejector tube 4, efficiently and accurately guiding the exhaust gas into the internal bleed pipe 1, providing a stable and reliable gas sample for subsequent testing.

[0044] For example, the internal air intake tube 1 is arranged radially along the ejector tube 4, and the curvature of the bend is 90°.

[0045] It should be noted that the concentration and temperature of the exhaust gas may differ along the axial and radial directions of the ejector tube 4. To adjust the exhaust gas collection position, the following method can be used:

[0046] In one method, there are multiple internal air intake tubes 1, each with a different length. By replacing internal air intake tubes 1 of different lengths, the internal air intake tubes 1 can extend radially to different positions of the ejector tube 4. (See [reference]). Figure 4a .

[0047] Alternatively, the quick-release connector for the ejector tube 4 of the aero-engine test stand also includes an extension tube, one end of which is fixedly connected to the drain bend. This extension tube allows the position of the drain bend in the axial and / or radial direction of the ejector tube 4 to be adjusted as needed.

[0048] Specifically, if it is necessary to change the position of the exhaust gas collection point along the axis of the ejector tube 4, the extension tube is a straight tube 11, achieved through extension tubes of different axial lengths, ensuring accurate capture of exhaust gas characteristics at a specific axial position within the ejector tube 4. (See [reference]). Figure 4b .

[0049] If it is necessary to change the radial position of the exhaust gas collection point in the ejector tube 4, the extension tube includes a horizontal straight section 12, a first bend section 13, a vertical straight section 14, and a second bend section 15. The addition of the vertical bend section allows the air inlet end of the internal air intake pipe 1 to penetrate to different radial and axial positions in the ejector tube 4, thereby obtaining exhaust gas samples from different locations. See [link to documentation]. Figure 4c .

[0050] In summary, this design enhances the flexibility and adaptability of quick-release connectors, making exhaust gas collection more accurate and efficient, and providing more reliable data support for the detection and analysis of exhaust gas on aero-engine test benches.

[0051] Furthermore, to enable adjustable exhaust gas flow rate, the quick-release connector for the ejector tube 4 of the aero-engine test stand also includes a flow regulating valve on the external air intake pipe 3. This flow regulating valve allows for flexible adjustment of the exhaust gas flow rate through the external air intake pipe 3 according to actual testing requirements. When a large volume of exhaust gas sample is needed for comprehensive analysis, the flow regulating valve can be opened wider, allowing more exhaust gas to pass through smoothly. Conversely, when only a small amount of exhaust gas is needed for specific indicator testing, the flow regulating valve can be closed to precisely control the exhaust gas flow rate, avoiding unnecessary exhaust gas pollution and ensuring the stability and accuracy of the testing process.

[0052] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quick-release connector for an ejector tube on an aero-engine test stand, characterized in that, Includes internal air intake tubes, connecting tubes, and external air intake tubes; The ejector tube has a detection hole on its side wall, one end of the connecting pipe is sealed and fixedly connected to the detection hole, and the other end of the connecting pipe is provided with a connecting flange; One end of the internal air intake pipe passes through the connecting pipe and the detection hole and extends into the ejector tube, while the other end of the internal air intake pipe is provided with a first end flange; One end of the external air intake pipe is connected to the detection equipment, and the other end of the external air intake pipe is provided with a second end flange.

2. The quick-release connector for the ejector tube of an aero-engine test stand according to claim 1, characterized in that, The quick-release connector also includes a reinforcing plate sleeved on the outer wall of the connecting pipe.

3. The quick-release connector for the ejector tube of an aero-engine test stand according to claim 1, characterized in that, The quick-release connector also includes a reinforcing rib, which is located at the corner where the reinforcing plate and the connecting pipe are connected, and the reinforcing rib, the reinforcing plate and the connecting pipe are fixedly connected.

4. The quick-release connector for the ejector tube of an aero-engine test stand according to claim 1, characterized in that, There are multiple internal air intake tubes, and the lengths of the multiple internal air intake tubes are different.

5. The quick-release connector for the ejector tube of an aero-engine test stand according to claim 1, characterized in that, The quick-release connector also includes an air intake bend, one end of which is fixedly connected to the internal air intake pipe, and the other end of which is arranged along the axial direction of the ejector tube and faces the direction of exhaust gas inflow.

6. The quick-release connector for the ejector tube of an aero-engine test stand according to claim 5, characterized in that, The internal air intake tube is arranged radially along the ejector tube, and the curvature of the bend is 90°.

7. The quick-release connector for the ejector tube of an aero-engine test stand according to claim 5, characterized in that, The quick-release connector also includes an extension tube, one end of which is fixedly connected to the drainage bend.

8. The quick-release connector for the ejector tube of an aero-engine test stand according to claim 7, characterized in that, The extension tube is a straight tube.

9. The quick-release connector for the ejector tube of an aero-engine test stand according to claim 7, characterized in that, The extension pipe includes a horizontal straight pipe section, a first bend pipe section, a vertical straight pipe section, and a second bend pipe section that are connected in sequence to the drainage bend pipe.

10. The quick-release connector for an ejector tube of an aero-engine test stand according to any one of claims 1 to 9, characterized in that, The quick-release connector also includes a flow regulating valve located on the external air intake pipe.

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