An exhaust tower with a rainproof structure

Abstract

This utility model relates to an exhaust tower with a rainproof structure, belonging to the field of aero-engine testing technology. It solves the problem in existing technologies where rainproof plates installed on the top of exhaust towers increase exhaust resistance, affecting normal engine testing and increasing noise propagation range. The rainproof structure of this utility model includes multiple rainproof baffles and support frames. Each rainproof baffle comprises two long strip components connected at their ends, forming an inverted V-shape. The upper surface of the rainproof baffle has guide channels to direct rainwater flow to both sides of the rainproof structure. Multiple support frames are provided at the bottom of each rainproof baffle. The multiple rainproof baffles are arranged in two or more layers, staggered vertically. The rainproof structure is located between the exhaust gas treatment device and the first-layer muffler inside the exhaust tower. This utility model, by using multiple layers of staggered rainproof baffles inside the exhaust tower, achieves rain protection for the exhaust gas treatment device without affecting exhaust and noise reduction.

Description

Technical Field

[0001] This utility model relates to the field of aero-engine testing technology, and in particular to an exhaust tower with a rainproof structure. Background Technology

[0002] Currently, some military industrial units' test bases are gradually being surrounded by cities. Exhaust from aircraft engine test stands is being discharged directly from the exhaust towers without any treatment, causing varying degrees of impact on the living environment and health of nearby residents. Calls for exhaust gas treatment at these test stands are growing louder. However, the exhaust gas treatment devices installed on the exhaust towers are affected by rainfall; rainwater may directly enter the device, reducing treatment efficiency and increasing maintenance costs. The traditional method of rain protection involves adding a human-shaped rain shield to the top of the exhaust tower, but this significantly increases exhaust resistance and also affects the noise propagation path during test stands, increasing the noise range. Another method is to add a mechanically driven telescopic baffle, opening it during rainfall and retracting it when not raining. This not only affects normal engine testing but also poses a risk of freezing of the transmission mechanism in winter in northern regions.

[0003] Therefore, it is necessary to design a rainproof structure suitable for aero-engine test stands to prevent the exhaust gas treatment device from malfunctioning due to rain without affecting the normal testing of the test stand. Utility Model Content

[0004] Based on the above analysis, the present invention aims to provide an exhaust tower with a rainproof structure to solve the problem that the rainproof plate installed on the top of the exhaust tower in the prior art increases the exhaust resistance of the exhaust tower, affects the normal test run of the engine, and also increases the noise propagation range.

[0005] On one hand, this utility model provides an exhaust tower with a rainproof structure, the rainproof structure including multiple rainproof baffles and support frames; each rainproof baffle includes two long strip components connected at their ends, and the two long strip components form an inverted V shape; the upper surface of the rainproof baffle is provided with a guide groove for guiding rainwater to both sides of the rainproof structure; each rainproof baffle has multiple support frames at its bottom; the multiple rainproof baffles are divided into two or more layers and are arranged alternately; the rainproof structure is located between the exhaust gas treatment device and the first layer silencer inside the exhaust tower.

[0006] Furthermore, the projection portions of the rainproof baffles of adjacent upper and lower layers overlap in the horizontal plane.

[0007] Furthermore, a gap is provided between the rainproof baffle and the surrounding walls of the exhaust tower.

[0008] Furthermore, the cross-section of the guide channel is semi-circular.

[0009] Furthermore, the cross-section of the guide channel is V-shaped or U-shaped.

[0010] Furthermore, the length of the rainproof baffle is greater than the dimension of the exhaust gas treatment device in the same direction.

[0011] Furthermore, the height of the support frame is between 2 meters and 3 meters.

[0012] Furthermore, the support frame is fixedly mounted on the frame of the exhaust gas treatment device.

[0013] Furthermore, the material of the rainproof baffle is ordinary steel or lightweight, corrosion-resistant material.

[0014] Furthermore, the pressure loss of the rainproof baffle is within 100 Pa.

[0015] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects: (1) This utility model adopts a multi-layer rainproof baffle arranged in an alternating manner inside the exhaust tower. The rainwater is guided to the drainage channels on both sides of the equipment through the guide groove on the upper surface of the rainproof baffle, so as to avoid washing the exhaust gas treatment device and realize the rainproof function of the exhaust gas treatment device. At the same time, it does not affect the exhaust and avoids the problem of the rainproof baffle affecting the noise propagation path and increasing the noise propagation range in the prior art.

[0016] (2) The structure of the rainproof baffle of this utility model makes its pressure loss very small, and its aerodynamic effect on the test bench can be ignored, and it does not affect the normal test of the engine.

[0017] (3) The rainproof baffle of this utility model can be installed by fixing the support frame to the frame of the exhaust gas treatment device. It does not affect the original soundproofing structure of the wall and is easy to modify the existing vehicle platform.

[0018] (4) The available space inside the exhaust tower is extremely limited. This rainproof baffle occupies little space and is easy to install.

[0019] 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 will 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 from the description and accompanying drawings, which are particularly pointed out. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is a schematic diagram of the cross-section of the rainproof baffle array in the exhaust tower with a rainproof structure of this utility model; Figure 2 This is a schematic diagram of the structure of the exhaust tower according to the present invention.

[0022] Figure label: 1-Rainproof baffle; 2-Support frame; 3-Exhaust gas treatment device; 4-Exhaust tower; 5-Silencer. Detailed Implementation

[0023] 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.

[0024] Example 1 This embodiment 1 relates to an exhaust tower with a rainproof structure, such as Figure 1-2 As shown.

[0025] See Figure 2 The exhaust tower 4 is equipped with an exhaust gas treatment device 3, and two layers of silencers 5 are installed above the exhaust gas treatment device 3. The exhaust gas from the aircraft engine test stand enters the exhaust gas treatment device 3 inside the exhaust tower 4 from the bottom. After being purified, it flows upward, passes through the silencers 5, and is discharged from the top of the tower.

[0026] In this embodiment, the rainproof structure is installed in the space between the exhaust gas treatment device 3 and the first layer silencer 5 inside the exhaust tower 4.

[0027] See Figure 2 The rainproof structure includes a rainproof baffle 1 and a support frame 2. The single rainproof baffle 1 is composed of two semi-circular arc-shaped strips or other drainage structures connected at their ends, and these two semi-circular arc-shaped strips or other drainage structures have a certain angle between them, forming an inverted V shape.

[0028] See Figure 1 The upper part of the rainproof baffle 1 is a semi-circular arc-shaped guide channel, which can guide rainwater to both sides of the rainproof structure to prevent the exhaust gas treatment device from being submerged in water and affecting the exhaust gas treatment efficiency. The inclination and semi-circular arc dimensions of the rainproof baffle 1 can be designed according to the local maximum rainfall to ensure that the capacity of the guide channel can meet the maximum rainfall.

[0029] The rainproof baffle 1 can be made of ordinary steel or lightweight, corrosion-resistant materials. The wall thickness of the rainproof baffle 1 is checked based on the selected material and the bearing capacity of the foundation. The length is adjusted according to the size of the exhaust gas treatment device to ensure that the exhaust gas treatment device is within the effective rainproof range of the rainproof baffle 1. Typically, the length of the rainproof baffle 1 is greater than the dimension of the exhaust gas treatment device 3 in the same direction.

[0030] Rainproof baffles 1 are arranged in a staggered pattern to achieve full coverage in terms of visual area, while allowing for smooth airflow. Numerical simulations were used to determine the vertical spacing and number of layers of rainproof baffles 1, ensuring that pressure loss is within a controllable range and does not affect normal test runs. The more layers and the larger the vertical spacing of the rainproof baffles 1, the less pressure loss they will cause. The specific number of layers and vertical spacing will depend on the actual installation space.

[0031] The rainproof baffles 1 of adjacent layers have an appropriate overlap in their projections on the horizontal plane to ensure no leakage during rainfall. The rainproof baffles 1 are spaced appropriately from the surrounding walls of the exhaust tower 4, with no direct contact, thus avoiding damage to the original sound-absorbing structure of the walls. Rainwater is guided through the rainproof baffles 1 to the ground and then discharged through the ground drainage system.

[0032] Each rainproof baffle 1 is equipped with sufficient support frames 2, which are installed on the frame of the exhaust gas treatment device. The height of the support frames 2 should not be too high or too low. If it is too high, it will affect the installation space of the rainproof baffle; if it is too low, it will prevent maintenance personnel from passing through. Preferably, the height of the support frames 2 is between 2 meters and 3 meters to facilitate the operation of maintenance personnel.

[0033] Based on the installation space and aerodynamic requirements, the number of layers is determined to be 2 or more, the vertical spacing is determined, and the number of pieces arranged in each layer is determined. Based on the simulation calculation results, the pressure loss of the rainproof baffle 1 is controlled to be within 100pa, which can be ignored in the high-flow engine test.

[0034] This utility model employs a multi-layered rainproof baffle arranged in an alternating pattern inside the exhaust tower. Rainwater is guided to the drainage channels on both sides of the equipment through the guide grooves on the upper surface of the rainproof baffle, preventing it from washing over the exhaust gas treatment device and achieving the rainproof function of the exhaust gas treatment device without affecting the exhaust noise reduction.

[0035] 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. An exhaust tower with a rainproof structure, characterized in that, The rainproof structure includes multiple rainproof baffles and support frames; each rainproof baffle includes two long strip components connected at their ends, forming an inverted V-shape between the two long strip components; the upper surface of the rainproof baffle is provided with a guide groove to guide rainwater to both sides of the rainproof structure; each rainproof baffle has multiple support frames at its bottom; the multiple rainproof baffles are divided into two or more layers and are arranged alternately; the rainproof structure is located between the exhaust gas treatment device and the first layer silencer inside the exhaust tower.

2. The exhaust tower with a rainproof structure according to claim 1, characterized in that, The rainproof baffles of adjacent layers overlap in the horizontal plane.

3. The exhaust tower with a rainproof structure according to claim 1, characterized in that, There is a gap between the rainproof baffle and the surrounding walls of the exhaust tower.

4. The exhaust tower with a rainproof structure according to claim 1, characterized in that, The cross-section of the guide channel is semi-circular.

5. The exhaust tower with a rainproof structure according to claim 1, characterized in that, The cross-section of the guide channel is V-shaped or U-shaped.

6. The exhaust tower with a rainproof structure according to any one of claims 1-5, characterized in that, The length of the rainproof baffle is greater than the dimension of the exhaust gas treatment device in the same direction.

7. The exhaust tower with a rainproof structure according to claim 1, characterized in that, The height of the support frame is between 2 meters and 3 meters.

8. The exhaust tower with a rainproof structure according to claim 1, characterized in that, The support frame is fixedly mounted on the frame of the exhaust gas treatment device.

9. The exhaust tower with a rainproof structure according to claim 1, characterized in that, The rainproof baffle is made of ordinary steel or lightweight, corrosion-resistant materials.

10. The exhaust tower with a rainproof structure according to claim 1, characterized in that, The pressure loss of the rainproof baffle is within 100 Pa.

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