An integrated high-pressure compressor bleed pipe

Abstract

This invention discloses an integrated high-pressure compressor bleed air pipe. A bleed air mounting base is welded to the outside of the outer casing, and mounting holes are provided at the four corners of the mounting base for easy tightening and fixing with bolts. The outer casing is hollow and has an air inlet and an air outlet, which are connected to the hollow space inside the outer casing. A cooling air assembly is installed inside the outer casing to cool the cooling air. An air filter assembly is installed inside the outer casing to filter the cooling air. After cooling by the cooling air assembly and filtration by the air filter assembly, the filtered and cooled low-temperature clean air provides high-quality cooling to the turbine blades, solving the problem of poor cooling quality in turbine blades due to high-temperature introduced cooling air.

Description

Technical Field

[0001] This invention relates to an integrated high-pressure compressor bleed pipe, belonging to the field of aero-engine technology. Background Technology

[0002] Aero gas turbine engines often require high-pressure air to be drawn from the high-pressure compressor to cool the turbine blades. However, the drawn high-pressure air has two main drawbacks: First, because aero gas turbine engines often operate in atmospheric environments containing sand and dust or with severe pollution, the particle concentration near the air intake is relatively high due to the centrifugal force of the compressor blades. After being introduced into the turbine blades, particles are prone to depositing and clogging the film cooling pores, resulting in the inability of cooling air to flow, reducing film cooling efficiency, and affecting the reliability of the turbine blades. Second, the air temperature at the high-pressure compressor is relatively high, sometimes exceeding 500°C. The high temperature of the introduced cooling air leads to poor cooling quality for the turbine blades in the later stages.

[0003] Although a Chinese patent (CN2019209867513) discloses an aero-engine system and aircraft that uses an air filter to filter dust and impurities, thus solving the problem of particle deposition and blockage of the air film pores after the introduction of the turbine blades, which leads to the inability of cooling air to flow and reduces the air film cooling efficiency, the problem of high temperature of the introduced cooling air and poor cooling quality of the turbine blades in the later stage still exists. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides an integrated high-pressure compressor bleed pipe.

[0005] The present invention is achieved through the following technical solutions.

[0006] This invention provides an integrated high-pressure compressor bleed pipe, comprising:

[0007] The outer casing has an air duct mounting base welded to its exterior.

[0008] The outer casing is hollow and has an air inlet and an air outlet, which are connected to the hollow space inside the outer casing.

[0009] Cooling air assembly: The cooling air assembly is installed inside the outer casing to cool the air.

[0010] Air filter assembly: The air filter assembly is installed inside the outer casing to filter the cooling air.

[0011] The air inlet of the outer casing is eccentrically set; it also includes an air bleed mounting base, which is eccentrically welded and fixedly connected to the outer casing. The air bleed mounting base has a through hole inside, which is connected to the air inlet of the outer casing to form an air inlet.

[0012] The cooling air assembly is installed in front of the air filter assembly, and the air filter assembly is installed inside the cooling air assembly.

[0013] The cooling air assembly includes: an inner housing that is sealed and fixedly installed inside the outer casing, with a spiral cooling medium circulation path on the outer periphery of the inner housing; a cooling medium inlet interface on the outer casing corresponding to the cooling medium inlet of the cooling medium circulation path, and a cooling medium outlet interface on the outer casing corresponding to the cooling medium outlet of the cooling medium circulation path.

[0014] The cooling medium inlet and outlet ports are vertically distributed at a 90-degree angle on the outer casing.

[0015] The air filtration assembly includes: an air filter element installed inside the inner housing; the air filter element filters the air inlet and air outlet of the outer housing.

[0016] The air filter assembly further includes: a plug that is fixedly connected to the outer casing at the air outlet via a flange A, bolt A, locking washer A and nut A, and the plug has an exhaust hole in the middle for the cooled gas after filtration to be discharged.

[0017] An inner metal mesh and an outer metal mesh are spaced apart and installed on the end of a plug located inside the inner housing; the air filter element is supported by being installed between the inner and outer metal meshes.

[0018] Both the inner and outer metal mesh layers are fixed to the end of the plug by screws and flange C.

[0019] The outer periphery of the plug is in sealed contact with the inner shell via a sealing ring.

[0020] The air filter assembly further includes an exhaust pipe that is connected to the exhaust port of the plug.

[0021] The exhaust pipe is fixedly connected to flange B, bolt B, locking washer B, and plug.

[0022] The beneficial effects of this invention are as follows: After the air introduced from the high-pressure compressor enters the air inlet of the outer casing, it is cooled by the cooling air assembly and filtered by the air filter assembly. The filtered and cooled low-temperature clean air is used to cool the turbine blades with high quality, which solves the problem that the cooling air temperature is too high and the cooling effect on the turbine blades is poor in the later stage. Attached Figure Description

[0023] Figure 1 This is a cross-sectional schematic diagram from the perspective of the structure of the present invention;

[0024] Figure 2This is a cross-sectional schematic diagram from the main viewpoint of the present invention;

[0025] In the diagram: 1-Outer metal mesh; 2-Air filter element; 3-Inner metal mesh; 4-Screw; 5-Flange C; 6-Sealing ring; 7-Plug; 8-Bolt A; 9-Locking washer A; 10-Nut A; 11-Air bleed mounting base; 12-Inner shell; 13-Outer shell; 14-Cooling medium circulation path; 15-Cooling medium inlet interface; 16-Cooling medium outlet interface; 17-Exhaust pipe; 18-Bolt B; 19-Locking washer B. Detailed Implementation

[0026] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0027] like Figures 1 to 2 As shown.

[0028] This application discloses an integrated high-pressure compressor bleed pipe, comprising:

[0029] The outer casing 13 provides the mounting base. An air duct mounting seat 11 is welded to the outside of the outer casing 13. The air duct mounting seat 11 has mounting holes at the four corners to facilitate tightening and fixing the installation with bolts.

[0030] The outer casing 13 is hollow inside and has an air inlet and an air outlet, which are connected to the hollow space inside the outer casing 13.

[0031] A cooling air assembly installed inside the outer casing 13 to cool the cooling air;

[0032] An air filter assembly installed inside the outer casing 13 to filter cooling air.

[0033] The air inlet of the outer casing 13 is connected to the air outlet of the high-pressure compressor, and the air outlet of the outer casing 13 is connected to the gas interface point of the turbine blades. After the air introduced from the high-pressure compressor enters the air inlet of the outer casing 13, it is cooled by the cooling air assembly and filtered by the air filter assembly. The filtered and cooled low-temperature clean air is used to cool the turbine blades with high quality, which solves the problem that the cooling air temperature is too high and the cooling effect on the turbine blades is poor in the later stage.

[0034] The air inlet of the outer casing 13 is eccentrically set; it also includes an air intake mounting base 11, which is eccentrically welded and fixedly connected to the outer casing 13. The air intake mounting base 11 has a through hole inside, which is connected to the air inlet of the outer casing 13 to form an air inlet. This allows the air entering the outer casing 13 from the high-pressure compressor to rotate, causing solid particles such as dust and impurities with large inertial centrifugal force to be thrown into the gas on the inner wall of the cooling air assembly and separated. At the same time, the high temperature and high pressure gas entering from the air inlet is pre-cooled by the separated solid particles as a cooling medium. After being further filtered by the cooling air assembly, it serves as the cooling airflow for the turbine blades.

[0035] The cooling air assembly is installed in front of the air filter assembly, and the air filter assembly is installed inside the cooling air assembly. This allows the air to be partially cooled down first, reducing the heat generated by the step change in the air. As a result, the air entering the air filter assembly later is more concentrated in the middle of the air filter assembly, where it is cooled and filtered simultaneously, thus improving the filtration effect of the air filter assembly.

[0036] The cooling air assembly includes: an inner housing 12, which is hermetically and fixedly installed inside the outer casing 13; a spiral cooling medium circulation path 14 is provided on the outer periphery of the inner housing 12; the outer casing 13 is provided with a cooling medium inlet interface 15 corresponding to the cooling medium inlet of the cooling medium circulation path 14, and a cooling medium outlet interface 16 corresponding to the cooling medium outlet of the cooling medium circulation path 14; cooling medium is introduced into the spiral cooling medium circulation path 14 through the cooling medium inlet interface 15 and discharged through the cooling medium outlet interface 16. When high-temperature cooling air introduced from the high-pressure compressor enters through the air inlet of the bleed air mounting base 11, the high-temperature cooling air exchanges heat with the cooling medium in the cooling medium circulation path 14 through the inner housing 12 for cooling. The spiral cooling medium circulation path 14 increases the heat exchange time and improves the cooling effect.

[0037] The inner housing 12 and the outer housing 13 are sealed and welded together as one unit.

[0038] The cooling medium inlet 15 and cooling medium outlet 16 are vertically distributed at ninety degrees on the outer casing 13; the cooling medium conduit can be connected to the cooling medium inlet 15 and cooling medium outlet 16 on the air duct mounting base 11 through a bolt flange connection structure for sealed connection, which is convenient for installation and maintenance.

[0039] The air filtration assembly includes an air filter element 2 installed within the inner housing 12. The air filter element 2 is made of a metal-ceramic porous material, possessing excellent filtration efficiency such as high porosity, large flow rate, and low resistance. It can operate continuously at temperatures below 800℃ and is suitable for the high-temperature environment of the high-pressure compressor bleed location. The air filter element 2 separates the air inlet and air outlet of the outer housing 13. Cooled air is filtered by the air filter element 2 and then discharged from the air outlet of the outer housing 13.

[0040] The air filter assembly further includes: a plug 7 fixedly connected to the outer casing 13 at the air outlet via a flange A, bolt A8, locking washer A9 and nut A10, and the plug 7 has an exhaust hole in the middle for the cooled gas after filtration to be discharged.

[0041] An inner metal mesh 3 and an outer metal mesh 1 are spaced apart on the end of a plug 7 located within the inner housing 12, and the air filter element 2 is supported by being installed between the inner metal mesh 3 and the outer metal mesh 1. The end of the air filter element 2, away from the air intake mounting seat 11, is embedded in the plug 7.

[0042] Both the inner metal mesh 3 and the outer metal mesh 1 are fixed to the end of the plug 7 by screws 4 and flanges C5.

[0043] The plug 7 has an annular groove on its outer periphery for installing the sealing ring 6, and the outer periphery of the plug 7 is in sealed contact with the inner shell 12 via the sealing ring 6.

[0044] The air filter assembly further includes an exhaust pipe 17 that communicates with the exhaust port of the plug 7. The filtered cooling gas discharged from the exhaust port of the plug 7 is led through the exhaust pipe 17 to cool the turbine blades. The exhaust pipe 17 is fixedly connected to the flange B, bolt B18, locking washer B19, and plug 7.

[0045] The bleed air mounting base 11 is eccentrically welded and fixed to the outer shell 13. After the airflow is tangentially introduced into the inner body 12, it rotates, causing solid particles such as dust and impurities with large inertial centrifugal force to be thrown towards the inner wall of the inner body 12 and separated from the gas. At the same time, the high temperature and high pressure gas is pre-cooled under the action of the cooling medium. After being filtered by the air filter element 2, it flows into the duct 17 and becomes the cooling airflow for the turbine blades.

Claims

1. An integrated high-pressure compressor bleed pipe, characterized in that, include: The outer casing (13) has an air intake mounting base (11) welded to its exterior; The outer casing (13) is hollow inside and has an air inlet and an air outlet, which are connected to the hollow space inside the outer casing (13); Cooling air assembly, which is installed inside the outer casing (13) to cool the cooling air; An air filter assembly is installed inside the outer casing (13) to filter the cooling air; The air inlet of the outer casing (13) is eccentrically set; it also includes an air intake mounting seat (11), which is eccentrically fixedly connected to the outer casing (13). The air intake mounting seat (11) has a through hole inside and is connected to the air inlet of the outer casing (13) to form an air inlet. This causes the high-pressure compressor to rotate when it enters the outer casing (13), causing the dust and impurity solid particles with large inertial centrifugal force to be thrown into the gas on the inner wall of the cooling air assembly and separated. At the same time, the high temperature and high pressure gas entering from the air inlet is pre-cooled by the separated solid particles as a cooling medium. After being filtered by the cooling air assembly, it serves as the cooling airflow for the turbine blades. The cooling air assembly includes: an inner housing (12) that is sealed and fixedly installed inside the outer casing (13), and a spirally distributed cooling medium circulation path (14) is provided on the outer periphery of the inner housing (12); The outer casing (13) is provided with a cooling medium inlet interface (15) corresponding to the cooling medium inlet of the cooling medium circulation path (14), and the outer casing (13) is provided with a cooling medium outlet interface (16) corresponding to the cooling medium outlet of the cooling medium circulation path (14). The cooling medium inlet (15) and cooling medium outlet (16) are vertically distributed at ninety degrees on the outer casing (13).

2. The integrated high-pressure compressor bleed pipe as described in claim 1, characterized in that: The cooling air assembly is installed in front of the air filter assembly, and the air filter assembly is installed inside the cooling air assembly.

3. The integrated high-pressure compressor duct pipe as described in claim 1, characterized in that, The air filtration assembly includes: an air filter element (2) installed inside the inner housing (12); The air filter (2) filters the air inlet and air outlet of the outer casing (13).

4. The integrated high-pressure compressor bleed pipe as described in claim 3, characterized in that, The air filter assembly further includes a plug (7) which is fixedly connected to the outer casing (13) at the air outlet via a flange A, bolt A (8), locking washer A (9) and nut A (10). The plug (7) has an exhaust vent in the middle for the cooled gas after filtration to be discharged. An inner metal mesh (3) and an outer metal mesh (1) are spaced apart on the end of a plug (7) located inside the inner housing (12); the air filter (2) is supported by being installed between the inner metal mesh (3) and the outer metal mesh (1).

5. The integrated high-pressure compressor bleed pipe as described in claim 4, characterized in that: The inner metal mesh (3) and the outer metal mesh (1) are both fixed to the end of the plug (7) by screws (4) and flange C (5).

6. The integrated high-pressure compressor bleed pipe as described in claim 4, characterized in that: The outer periphery of the plug (7) is in sealed contact with the inner shell (12) via the sealing ring (6).

7. The integrated high-pressure compressor bleed pipe as described in claim 4, characterized in that, The air filter assembly further includes an exhaust pipe (17) that is connected to the exhaust port of the plug (7).

Images