Tail gas treatment test device and aero-engine test stand

Abstract

The utility model discloses a tail gas treatment test device and aeroengine test bed belongs to tail gas treatment technical field to solve the problem that the detection data obtained by tail gas monitoring device in prior art is unstable, and the accuracy is poor or can not carry out synchronous processing to the detection gas while detecting. The device of the utility model includes gas pipeline, detection processing pipeline and exhaust pipeline, and the detection processing pipeline includes front end detection unit, processing unit and rear end detection unit, and the processing unit is filled with catalyst, and the gas pipeline, front end detection unit, processing unit, rear end detection unit and exhaust pipeline are connected in proper order, and the gas inlet end of gas pipeline is connected with the injection barrel of aeroengine test bed. The utility model can be used for the tail gas detection and processing of the injection barrel of aeroengine test bed.

Description

Technical Field

[0001] This utility model belongs to the field of exhaust gas treatment technology, and in particular relates to an exhaust gas treatment test device and an aero-engine test stand. Background Technology

[0002] Engine testing is a crucial step in engine research, development, production, and maintenance. During this process, the exhaust gases emitted from the test stand contain various pollutants, including nitrogen oxides, particulate matter, and non-methane hydrocarbons. Direct emission of these gases would adversely affect the surrounding environment; therefore, effective treatment is essential. To ensure effective exhaust gas treatment, it is necessary to accurately determine the concentration and content of pollutants in the exhaust gas and develop a targeted treatment plan based on this information.

[0003] Currently, the main monitoring method involves placing the detection probe at the exhaust tower outlet of the test bench. While this method can detect the pollutant components and their corresponding concentrations in the exhaust gas, the unstable airflow at the exhaust tower outlet makes it impossible to obtain a stable gas source during the detection process, affecting the accuracy and continuity of the detection data. Furthermore, the above monitoring method can only perform the detection function and cannot simultaneously treat the detected exhaust gas, making it difficult to form an integrated detection-treatment process. Utility Model Content

[0004] Based on the above analysis, this utility model aims to provide an exhaust gas treatment test device and an aero-engine test stand to solve the problems of unstable detection data, poor accuracy, or inability to simultaneously process the detected gas in the existing exhaust gas monitoring devices.

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

[0006] This utility model provides an exhaust gas treatment test device, including an intake pipe, a detection and treatment pipe, and an exhaust pipe;

[0007] The testing and processing pipeline includes a front-end testing unit, a processing unit, and a rear-end testing unit. The processing unit contains a catalyst. The bleed air pipeline, the front-end testing unit, the processing unit, the rear-end testing unit, and the exhaust pipeline are connected in sequence. The intake end of the bleed air pipeline is connected to the ejector tube of the aero-engine test stand.

[0008] Furthermore, the exhaust gas treatment test device also includes a fan, which is located between the exhaust gas pipeline and the front-end detection unit.

[0009] Furthermore, the exhaust gas treatment test device also includes a heater, which is located between the front-end detection unit and the treatment unit.

[0010] Furthermore, the exhaust gas treatment test device also includes sealing components, and the exhaust gas pipeline and the front-end detection unit, the front-end detection unit and the treatment unit, the treatment unit and the rear-end detection unit, and the rear-end detection unit and the exhaust pipeline are all sealed and connected by sealing components.

[0011] Furthermore, the sealing element between the front-end detection unit and the processing unit includes a sealing flange, one end of which is connected to the front-end detection unit and the other end of which is connected to the processing unit.

[0012] Furthermore, the sealing element between the front-end detection unit and the processing unit also includes a first sealing ring, which is located at the connection surface between one end of the sealing flange and the front-end detection unit.

[0013] Furthermore, the seal between the front-end detection unit and the processing unit also includes a second sealing ring, which is located at the connection surface between the other end of the sealing flange and the processing unit.

[0014] This utility model also provides an aero-engine test stand, including an ejector tube and the aforementioned exhaust gas treatment test device.

[0015] Furthermore, an air vent is provided on the ejector tube.

[0016] Furthermore, the air intake port is located at the bottom of the ejector tube.

[0017] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0018] A) The exhaust gas treatment test device provided by this utility model uses a small-volume catalyst exhaust gas treatment unit to conduct exhaust gas treatment effect tests on a test bench. Part of the test bench exhaust gas is introduced into the exhaust gas treatment test device through an air intake pipe. The treatment unit purifies the introduced exhaust gas. At the same time, the front-end detection unit detects pollutants in the exhaust gas before purification, and the back-end detection unit detects pollutants in the exhaust gas after purification. While treating the exhaust gas from the ejector tube of the aero-engine test bench, the purification and detection effects are compared, forming an integrated process of detection and purification. This provides certain data support for the selection of exhaust gas treatment units used in the subsequent modification of aero-engine test bench exhaust gas treatment, and helps in the formulation of test bench exhaust gas treatment schemes.

[0019] B) The exhaust gas treatment test device provided by this utility model has good flow stability of exhaust gas in the exhaust gas inlet pipe and subsequent front-end detection unit, treatment unit and back-end detection unit because the diameter of the exhaust gas inlet pipe is much smaller than the size of the exhaust tower opening of the test bench. This ensures the accuracy and continuity of the test data.

[0020] 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

[0021] 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.

[0022] Figure 1 This is a structural block diagram of the exhaust gas treatment test device provided in Embodiment 1 of the present utility model;

[0023] Figure 2 A schematic diagram showing the connection between the front-end detection unit, the processing unit, and the back-end detection unit in the exhaust gas treatment test device provided in Embodiment 1 of this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the treatment unit in the exhaust gas treatment test device provided in Embodiment 3 of this utility model;

[0025] Figure 4 This is a schematic diagram of the internal structure of the exhaust gas treatment test device provided in Embodiment 3 of this utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the aero-engine test stand provided in Embodiment 4 of this utility model.

[0027] Figure label:

[0028] 1-Fan; 2-Air intake pipe; 3-Front-end detection unit; 4-Processing unit; 401-Mounting side plate; 402-Side plate slot; 403-Support plate; 404-Slide rail; 405-Mounting top plate; 406-Base plate; 5-Heater; 6-Ejector tube; 7-Exhaust pipe; 8-Rear-end detection unit. Detailed Implementation

[0029] 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.

[0030] Example 1

[0031] This embodiment provides an exhaust gas treatment test device, see [link]. Figures 1 to 2It includes an air intake pipe 2, a detection and processing pipe and an exhaust pipe 7. The detection and processing pipe includes a front detection unit 3, a processing unit 4 and a rear detection unit 8. The processing unit 4 contains a catalyst. The air intake pipe 2, the front detection unit 3, the processing unit 4, the rear detection unit 8 and the exhaust pipe 7 are connected in sequence. The air intake end of the air intake pipe 2 is connected to the ejector tube 6 of the aero-engine test stand.

[0032] Compared with the prior art, the exhaust gas treatment test device provided in this embodiment uses a small-volume catalyst exhaust gas treatment unit 4 to conduct exhaust gas treatment effect tests on the test bench. Part of the test bench exhaust gas is introduced into the exhaust gas treatment test device through the air intake pipe 2. The treatment unit 4 purifies the introduced exhaust gas. At the same time, the front-end detection unit 3 detects pollutants in the exhaust gas before purification, and the back-end detection unit 8 detects pollutants in the exhaust gas after purification. While treating the exhaust gas of the ejector tube 6 of the aero-engine test bench, the purification and detection effects are compared, forming an integrated process of detection and purification. This provides certain data support for the selection of exhaust gas treatment unit 4 used in the subsequent modification of aero-engine test bench exhaust gas treatment, and helps to formulate test bench exhaust gas treatment schemes.

[0033] Meanwhile, since the diameter of the exhaust pipe 2 is much smaller than the size of the exhaust tower opening on the test bench, the flow stability of the exhaust gas in the exhaust pipe 2 and the subsequent front-end detection unit 3, processing unit 4 and rear-end detection unit 8 is good, thus ensuring the accuracy and continuity of the detection data.

[0034] In order to smoothly introduce some of the test bench exhaust gas into the exhaust gas treatment test device, the exhaust gas treatment test device also includes a fan 1. For example, the fan 1 is located between the air intake pipe 2 and the front-end detection unit 3. The air intake end of the fan 1 is connected to the air intake pipe 2, and the air outlet end of the fan 1 is connected to the front-end detection unit 3. The fan 1 provides the flow power of the test bench exhaust gas in the exhaust gas treatment test device.

[0035] It is worth noting that, in order to treat and purify the exhaust gas of the test bench using a catalyst, the exhaust gas needs to be heated to reach the reaction temperature of the catalyst. Therefore, the exhaust gas treatment test device also includes a heater 5. For example, the heater 5 is located between the air intake pipe 2 and the front-end detection unit 3. The air inlet of the heater 5 is connected to the air intake pipe 2, and the air outlet of the heater 5 is connected to the front-end detection unit 3. The heater 5 heats part of the exhaust gas of the test bench in order to reach the catalytic reaction temperature.

[0036] Example 2

[0037] The structure of the exhaust gas treatment test device provided in this embodiment is basically the same as that of the exhaust gas treatment test device provided in Embodiment 1, the difference being:

[0038] In order to improve the sealing performance of the exhaust gas treatment test device and reduce exhaust gas leakage, the exhaust gas treatment test device also includes a sealing element. The air intake pipe 2 and the front-end detection unit 3, the front-end detection unit 3 and the treatment unit 4, the treatment unit 4 and the rear-end detection unit 8, and the rear-end detection unit 8 and the exhaust pipe 7 are all sealed and connected by the sealing element.

[0039] Considering that the treatment unit 4 is filled with a catalyst, resulting in significant flow resistance of the exhaust gas, the sealing structure between the front-end detection unit 3 and the treatment unit 4 is designed to further improve the sealing performance. Specifically, the sealing element includes a first sealing ring, a second sealing ring, and a sealing flange. One end of the sealing flange connects to the front-end detection unit 3, with the first sealing ring positioned at the connection surface. The other end of the sealing flange connects to the treatment unit 4, with the second sealing ring positioned at the connection surface. This dual sealing effect of the first and second sealing rings effectively prevents exhaust gas leakage at the connection between the front-end detection unit 3 and the treatment unit 4, ensuring the sealing performance of the exhaust gas treatment test device. Furthermore, the sealing flange design facilitates disassembly and replacement of the sealing element, improving the maintenance convenience of the device.

[0040] Example 3

[0041] The structure of the exhaust gas treatment test device provided in this embodiment is basically the same as that of the exhaust gas treatment test device provided in Embodiment 1, the difference being:

[0042] For the structure of processing unit 4, see [link to documentation]. Figures 3 to 4 The device includes a top mounting plate 405, a bottom mounting plate, a side plate slot 402, and a side mounting plate 401. The top end of the side plate slot 402 is fixedly connected to the top mounting plate 405, and the bottom end of the side plate slot 402 is fixedly connected to the bottom mounting plate. The side mounting plate 401 is inserted into the side plate slot 402 and is detachably connected to the side plate slot 402. The top mounting plate 405, the bottom mounting plate, and the side mounting plate 401 constitute a catalyst module receiving tube, and the catalyst module is placed in the catalyst module receiving tube.

[0043] The side plate slot 402 includes two side slots and one bottom slot, which together form a U-shape. When the catalyst module needs to be replaced, the mounting side plate 401 is pulled out of the side plate slot 402, allowing the catalyst module to be removed from the catalyst module receiving tube without disassembling the mounting top plate 405, mounting bottom plate, and side plate slot 402. The maximum handling weight during disassembly only needs to consider the weight of the catalyst module itself. The operation is simple and quick, requiring only one person, reducing the time and labor costs associated with catalyst module replacement and thus significantly improving the efficiency of exhaust gas treatment.

[0044] To facilitate the removal of the catalyst module from the catalyst receiving tube, the mounting base structure specifically includes a base plate substrate 406, a support plate 403, a slide rail 404, and a sliding groove. The slide rail 404 is mounted on the support plate 403, and the sliding groove is mounted on the base plate substrate 406. The slide rail 404 is inserted into the sliding groove and can slide along the groove. The sliding direction of the support plate 403 is perpendicular to the plane of the mounting side plate 401. Thus, the sliding of the support plate 403 provides support and guidance for the removal of the catalyst module, making it easier to remove the catalyst module from the catalyst module receiving tube.

[0045] Example 4

[0046] This embodiment provides an aircraft engine test stand, see [link / reference] Figure 5 It includes ejector tube 6 and exhaust gas treatment test device provided in Example 1.

[0047] Compared with the prior art, the beneficial effects of the aero-engine test stand provided in this embodiment are basically the same as those of the exhaust gas treatment test device provided in Embodiment 1, and will not be described in detail here.

[0048] It is understandable that, in order to facilitate the connection between the ejector tube 6 and the air intake pipe 2, an air intake hole is provided on the ejector tube 6. For example, the air intake hole is located at the bottom of the ejector tube 6.

[0049] 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 tail gas treatment test device, characterized in that, This includes bleed air lines, testing and processing lines, and exhaust lines; The detection and processing pipeline includes a front-end detection unit, a processing unit, and a rear-end detection unit. The processing unit contains a catalyst. The bleed air pipeline, the front-end detection unit, the processing unit, the rear-end detection unit, and the exhaust pipeline are connected in sequence. The air inlet of the bleed air pipeline is connected to the ejector tube of the aero-engine test stand.

2. The exhaust gas treatment test apparatus according to claim 1, characterized in that, The exhaust gas treatment test device also includes a fan, which is located between the exhaust gas pipeline and the front-end detection unit.

3. The exhaust gas treatment test apparatus according to claim 1, characterized in that, The exhaust gas treatment test device also includes a heater, which is located between the front-end detection unit and the treatment unit.

4. The exhaust gas treatment test apparatus according to claim 1, characterized in that, The exhaust gas treatment test device also includes a sealing element, and the air intake pipe is sealed to the front-end detection unit, the front-end detection unit and the treatment unit, the treatment unit and the rear-end detection unit, and the rear-end detection unit and the exhaust pipe through the sealing element.

5. The exhaust gas treatment test apparatus according to claim 4, characterized in that, The sealing element between the front-end detection unit and the processing unit includes a sealing flange, one end of which is connected to the front-end detection unit and the other end of which is connected to the processing unit.

6. The exhaust gas treatment test apparatus according to claim 5, characterized in that, The sealing element between the front-end detection unit and the processing unit also includes a first sealing ring, which is located at the connection surface between one end of the sealing flange and the front-end detection unit.

7. The exhaust gas treatment test apparatus according to claim 6, characterized in that, The sealing element between the front-end detection unit and the processing unit also includes a second sealing ring, which is located at the connection surface between the other end of the sealing flange and the processing unit.

8. An aircraft engine test stand, characterized in that, It includes an ejector tube and an exhaust gas treatment test apparatus as described in any one of claims 1 to 7.

9. The aero-engine test stand according to claim 8, characterized in that, An air intake hole is provided on the ejector tube.

10. The aircraft engine test stand according to claim 9, characterized in that, The air intake hole is located at the bottom of the ejector tube.

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