Collecting device for combustion products of fuel-rich gas generator of aero-engine

Abstract

The utility model discloses a collection device for combustion products of an aero-engine fuel-rich gas generator, which adopts an asbestos fiber material, a zeolite molecular sieve, sandy soil and a filter screen for multiple filtration, and filters and collects solid-liquid components in outlet flue gas; and under the action of the water-cooling coil pipe, the residual outlet flue gas is cooled to a safe temperature, and the low-pressure gas tank is utilized to complete the collection of gas components. The collecting device disclosed by the utility model is stable in material performance, low in price, good in usability and service life, and capable of obtaining remarkable working and economic benefits.

Description

Technical Field

[0001] This utility model belongs to the field of aero-engine combustion technology, specifically relating to a collection device for combustion products of an aero-engine rich gas generator. Background Technology

[0002] With the development of aerospace technology, high-performance, highly reliable, and low-emission aero-engine technology has attracted widespread attention from various countries. Building upon the current state of aero-engine development, how to further optimize aero-engine technology is a key issue that needs to be explored and resolved. As the core of engine power output, the combustion device, including the thrust chamber and gas generator, determines the vibration magnitude and thrust adjustment capability of the entire engine under varying operating conditions, and has a decisive impact on the feasibility of deep variable thrust engine designs.

[0003] The gas generator provides higher combustion pressure and longer operating time for liquid rocket engines, making it crucial to the overall reliability and stability of the engine. The rich-fuel gas generator for aero-engines mainly consists of an injector, cylindrical section, spoiler ring, turbine blade simulator, and nozzle section. During steady-state operation, the turbine output power reaches its maximum. At low power output, the gas generator operates in pulse mode under controller control to ensure constant turbine speed and power output requirements. As one of the core combustion devices for engine power output, the combustion stability of the gas generator determines the vibration level and thrust regulation capability under varying engine operating conditions, thus being critical to the overall reliability and stability of the engine.

[0004] Because the collection of combustion products from gas generators is characterized by high temperature, high speed, and short collection time, existing technologies often employ samplers or vacuum tanks. However, these methods have certain drawbacks. For example, samplers collect a limited number of samples, making it difficult to conduct a reasonable analysis of the overall combustion conditions. Furthermore, the lifespan and reliability of sampler components decrease under harsh environments. Vacuum tank collection requires coverage of the entire fuel outlet, posing certain risks, and also demands high material strength and dimensional accuracy, resulting in poor economic efficiency and reusability. Therefore, a new device and method for collecting combustion products from gas generators is urgently needed. Summary of the Invention

[0005] To address the aforementioned problems in the existing technology, the purpose of this invention is to provide a collection device for combustion products from a fuel-rich gas generator in an aero-engine. This device employs multiple filtration methods, including asbestos fiber, zeolite molecular sieve, sand, and a filter screen, to collect the solid and liquid components in the outlet flue gas. A water-cooling coil further cools the remaining outlet flue gas to a safe temperature, and a low-pressure gas tank completes the collection of the gas components. The materials used in this collection device are stable, inexpensive, and have good usability and service life, resulting in significant operational and economic benefits.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A collection device for combustion products of an aero-engine rich gas generator, comprising an extraction system and a collection system;

[0008] The pumping system includes a vacuum pump 10, a three-way valve 6, an electrically controlled valve 7, a pressure gauge 8, and a gas cylinder 9; the vacuum pump 10 is connected to the first inlet of the three-way valve 6; the outlet of the three-way valve 6 is connected to the inlet of the electrically controlled valve 7; and the outlet of the electrically controlled valve 7 is connected to the inlet of the gas cylinder 9 via the pressure gauge 8.

[0009] The collection system includes a filtration system, a water-cooled coil 5, a three-way valve 6, an electrically controlled valve 7, a pressure gauge 8, and a gas cylinder 9 connected in sequence. At the outlet of the aircraft engine generator, a multi-stage filtration system is used to collect the high-temperature combustion gas. The filtration system includes asbestos fiber material 1, zeolite molecular sieve 2, sand 3, and a filter screen 4 arranged in sequence from the inlet to the outlet. When the combustion gas flows through the filtration system, the solid and liquid components are collected. The remaining combustion gas is cooled by the water-cooled coil 5. The outlet of the water-cooled coil 5 is connected to the second inlet of the three-way valve 6. The outlet of the three-way valve 6 is connected to the inlet of the electrically controlled valve 7. The outlet of the electrically controlled valve 7 is connected to the inlet of the gas cylinder 9 via the pressure gauge 8.

[0010] The zeolite molecular sieve 2 is made of alkali or alkaline earth metals, has interconnected channels, and a framework structure of silicate or aluminosilicate minerals. The basic structural unit of the zeolite molecular sieve is a tetrahedral framework structure formed by interconnected oxygen bridges. The pore size of the zeolite molecular sieve is 0.3-2 nm, and the specific surface area is as high as 400-800 m². 2 / g, and the molecular sieve has uniform pores and the pore size can be controlled according to the synthesis conditions.

[0011] The asbestos fiber material 1, zeolite molecular sieve 2, sand 3, and filter screen 4 in the filtration system are arranged in stainless steel pipes from inlet to outlet.

[0012] This utility model provides a collection device and detection method for combustion products from an aero-engine generator. It only requires connecting relevant equipment to the existing engine gas generator outlet for collection and detection. The materials used in the collection device are stable, inexpensive, and have good usability and service life, resulting in significant operational and economic benefits. The following advantages can be achieved:

[0013] (1) The filter and collection materials used in this utility model are low in cost and have stable physical and chemical properties, and have little impact on the collection and detection of combustible substances.

[0014] utility model

[0015] (2) The zeolite molecular sieve material used in this invention has excellent specific surface area and pore structure properties. Moreover, the pores of the molecular sieve are very uniform and the pore size can be controlled according to the synthesis conditions, thus exhibiting excellent selectivity and good adsorption performance. At the same time, the molecular sieve also has a large electrostatic attraction and a high affinity for molecules with strong polarity and high polarizability, thus having a strong adsorption efficiency.

[0016] (3) The stainless steel pipes used in the filtration system of this utility model can withstand a maximum temperature of 800℃, which can cope with the high temperature heating and scouring of gas, and have good safety and stability.

[0017] (4) The collection of combustion products of aero-engine generator in this utility model can be extended to other generator gases. Only the corresponding filter and pipeline materials need to be changed, which has good applicability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the device of this utility model. Detailed Implementation

[0019] like Figure 1 As shown, this utility model discloses a collection device for combustion products of a fuel-rich gas generator in an aero-engine. It employs multiple filtration methods, including asbestos fiber material, zeolite molecular sieve, sand, and a filter screen, to collect the solid and liquid components in the outlet flue gas. A water-cooling coil cools the remaining outlet flue gas to a safe temperature, and a low-pressure gas tank completes the collection of gas components. The mass of the solid and liquid components is obtained by weighing the mass change of the filtration device, and the composition distribution of the gas phase components is obtained by gas chromatography, enabling the assessment and analysis of the combustion conditions of the fuel-rich generator.

[0020] like Figure 1As shown, this utility model discloses a collection device for combustion products of a rich-fuel gas generator in an aero-engine, comprising an extraction system and a collection system. The extraction system includes a vacuum pump 10, a three-way valve 6, an electrically controlled valve 7, a pressure gauge 8, and a gas cylinder 9. The vacuum pump 10 is connected to the first inlet of the three-way valve 6; the outlet of the three-way valve 6 is connected to the inlet of the electrically controlled valve 7; the outlet of the electrically controlled valve 7 is connected to the inlet of the gas cylinder 9 via the pressure gauge 8. The collection system includes a filtration system, a water-cooled coil 5, the three-way valve 6, the electrically controlled valve 7, and a pressure gauge 8 connected in sequence. Pressure gauge 8 and gas cylinder 9; at the outlet of the aircraft engine generator, a multi-stage filtration system is used to collect high-temperature combustion gas; the filtration system includes asbestos fiber material 1, zeolite molecular sieve 2, sand 3 and filter screen 4 arranged sequentially from inlet to outlet; when the combustion gas flows through the filtration system, the solid and liquid components are collected; the remaining combustion gas is cooled by water-cooled coil 5; the outlet of water-cooled coil 5 is connected to the second inlet of three-way valve 6; the outlet of three-way valve 6 is connected to the inlet of electrically controlled valve 7; the outlet of electrically controlled valve 7 is connected to the inlet of gas cylinder 9 via pressure gauge 8.

[0021] Preferably, the zeolite molecular sieve 2 is made of silicate or aluminosilicate minerals containing alkali or alkaline earth metals, having interconnected channels and a framework structure. The basic structural unit of the zeolite molecular sieve is a tetrahedral framework structure formed by interconnected oxygen bridges. The pore size of the zeolite molecular sieve is 0.3–2 nm, and the specific surface area is as high as 400–800 m². 2 The molecular sieve exhibits uniform pore size, which can be controlled according to the synthesis conditions. This results in excellent selectivity and good adsorption performance. Furthermore, the molecular sieve possesses significant electrostatic attraction, exhibiting a high affinity for molecules with strong polarity and high polarizability, thus demonstrating strong adsorption efficiency.

[0022] Preferably, the asbestos fiber material 1, zeolite molecular sieve 2, sand 3 and filter screen 4 from the inlet to the outlet of the filtration system are arranged in a stainless steel pipe. The stainless steel pipe can withstand the high temperature heating and scouring of the gas, and has good safety and stability.

[0023] This utility model discloses a collection device and method for collecting and detecting combustion products from a fuel-rich gas generator in an aero-engine, as detailed below:

[0024] (1) Air extraction stage

[0025] During the evacuation phase, at 25℃ and 101 kPa, open the first inlet and outlet of the three-way valve 6, close the second inlet of the three-way valve 6, and connect the vacuum pump 10, the electrically controlled valve 7, and the 20L standard gas cylinder 9. Start evacuation by turning on the vacuum pump 10. When the pressure gauge reading is less than 10 kPa, close the three-way valve 6, the vacuum pump 10, and the electrically controlled valve 7 to prepare a negative pressure gas cylinder.

[0026] (2) Collection stage

[0027] Arrange 100g of asbestos fiber material, 100g of zeolite molecular sieve, 200g of sand, and a 400-mesh filter screen in a 20mm diameter stainless steel pipe, and weigh the entire filtration system. Connect the outlet of the filtration system to the inlet of cooling coil 5, and connect the outlet of cooling coil 5 to the second inlet of three-way valve 6. Close the first inlet of three-way valve 6. At the start of collection, connect the starting end of the collection system to the end of the heat exchanger and check for airtightness. After confirming there is no leakage, wait for experimental ignition. When combustion products are observed being ejected from behind the fuel-rich gas generator of the aero-engine, sequentially open the electronically controlled valve 7 and the second inlet and outlet of three-way valve 6. This allows the gas to pass through the filter, and the solid and liquid components are collected, cooled, and then enter the gas cylinder 9. The collection stage is now complete.

[0028] (3) Gas collection and detection analysis

[0029] Remove the filter system and weigh it again, comparing the mass with that before the start of the collection phase to calculate the mass of the solid and liquid components in the gas. Remove pressure gauge 8 and gas cylinder 9, and let them stand for 2-3 days until the pressure gauge readings stabilize. Collect a pre-set mass of gas sample using a gas trap, dissolve it in anhydrous ethanol, and perform gas chromatography analysis under selected chromatographic conditions. Determine the actual concentration of each component in the gas from the concentration-time curve of the gas sample. The gas chromatography analysis conditions are: HP-5 weakly polar capillary column; hydrogen as carrier gas; and the injector temperature controlled at 260℃. The programmed temperature rise method is as follows: initial temperature 40℃; heating rate of 3℃ / min during the 40-120℃ rise; heating rate of 10℃ / min during the 120-260℃ rise; and holding at 260℃ for 5 minutes. Calculate the component distribution of the gas phase.

[0030] This invention relates to a collection device and detection method for combustion products using multiple filtration and cooling processes. It can separate, cool, and detect the combustion products of a fuel-rich gas generator, thereby clarifying the combustion status and product distribution of the generator.

[0031] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A collection device for combustion products from a fuel-rich gas generator in an aero-engine, characterized in that: The device includes an air extraction system and a collection system; The pumping system includes a vacuum pump (10), a three-way valve (6), an electrically controlled valve (7), a pressure gauge (8), and a gas cylinder (9); the vacuum pump (10) is connected to the first inlet of the three-way valve (6); the outlet of the three-way valve (6) is connected to the inlet of the electrically controlled valve (7); the outlet of the electrically controlled valve (7) is connected to the inlet of the gas cylinder (9) via the pressure gauge (8); The collection system includes a filtration system, a water-cooled coil (5), a three-way valve (6), an electrically controlled valve (7), a pressure gauge (8), and a gas cylinder (9) connected in sequence. At the outlet of the aircraft engine generator, a multi-stage filtration system is used to collect the high-temperature gas. The filtration system includes asbestos fiber material (1), zeolite molecular sieve (2), sand (3), and a filter screen (4) arranged in sequence from the inlet to the outlet. When the gas flows through the filtration system, the solid and liquid components are collected. The remaining gas is cooled by the water-cooled coil (5). The outlet of the water-cooled coil (5) is connected to the second inlet of the three-way valve (6). The outlet of the three-way valve (6) is connected to the inlet of the electrically controlled valve (7). The outlet of the electrically controlled valve (7) is connected to the inlet of the gas cylinder (9) via the pressure gauge (8).

2. The collection device for combustion products of an aero-engine rich gas generator as described in claim 1, characterized in that: The zeolite molecular sieve (2) is made of silicate or aluminosilicate minerals containing alkali or alkaline earth metals, having interconnected channels and a framework structure. The basic structural unit of the zeolite molecular sieve is a tetrahedral framework structure formed by interconnected oxygen bridges. The pore size of the zeolite molecular sieve is 0.3-2 nm, and the specific surface area is as high as 400-800 m². 2 / g, and the molecular sieve has uniform pores and the pore size can be controlled according to the synthesis conditions.

3. The collection device for combustion products of an aero-engine rich gas generator as described in claim 1, characterized in that: The asbestos fiber material (1), zeolite molecular sieve (2), sand (3) and filter screen (4) in the filtration system are arranged in stainless steel pipes from inlet to outlet.

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