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CN-115992822-B - Rotary stamping diagonal flow centrifugal combined compressor and application thereof

CN115992822BCN 115992822 BCN115992822 BCN 115992822BCN-115992822-B

Abstract

The invention provides a rotary stamping diagonal flow centrifugal combined compressor and application thereof, belonging to the technical field of turbine engines, comprising an outer casing structure, an inner casing structure, a working mechanism and a diffusion mechanism, the outer casing structure and the inner casing structure are revolution bodies, the inner casing structure is located inside the outer casing structure, the inner casing structure and the outer casing structure form a working cavity, and the working mechanism is installed in the working cavity and used for pressurizing air flow. Compared with the compression mode of the conventional combined compressor, the invention uses the supercharging mode of the supersonic air inlet passage to lead the Mach number of the air flow relative to the rotating impeller to be more than 2 by high-speed rotation, and a series of weak oblique shock waves are constructed by the shrinkage of the passage at the moment, and the efficient compression system is obtained by the supercharging of the shock wave system, so that the single-stage pressure ratio is far higher than that of the conventional compressor, and the invention has compact structure, simple processing and long service life.

Inventors

  • JIN HAILIANG
  • CHEN XUAN
  • LI PING
  • SHAO CHUNLEI
  • XIE JIAN
  • Qiu Bingqing
  • YIN YUEQIAN
  • SHI SHANGUANG

Assignees

  • 中国航发湖南动力机械研究所

Dates

Publication Date
20260512
Application Date
20230207

Claims (8)

  1. 1. The rotary stamping diagonal flow centrifugal combined compressor is characterized by comprising an outer casing structure, an inner casing structure, a working mechanism and a diffusion mechanism; The outer casing structure and the inner casing structure are revolution bodies; The inner casing structure is positioned in the outer casing structure, and the inner casing structure and the outer casing structure form a working cavity; The working mechanism is arranged in the working cavity and is used for pressurizing air flow; The outer casing structure and the inner casing structure are connected with one end of the diffusion mechanism; The diffusion mechanism comprises a first diffuser (16) and a second diffuser (17), wherein the first diffuser (16) is used for diffusing along the radial direction of the outer casing structure, and the second diffuser (17) is used for diffusing along the axial direction of the outer casing structure; the outer casing structure comprises a first outer casing (1), a second outer casing (2), a third outer casing (3), a fourth outer casing (4) and a fifth outer casing (5) which are sequentially connected; The inner casing structure comprises a first inner casing (6), a second inner casing (7) and a third inner casing (8); the first inner casing (6) is positioned at the inner sides of the first outer casing (1) and the second outer casing (2); the second inner casing (7) is positioned at the inner side of the fourth outer casing (4); the third inner casing (8) is positioned at the inner side of the fifth outer casing (5); The working mechanism comprises an adjustable guide vane (9), a punching rotor (10), stator blades (11) and a centrifugal impeller (12); The adjustable guide vane (9) is arranged between the second outer casing (2) and the first inner casing (6); The punching rotor (10) is positioned on the inner side of the third outer casing (3) and between the first inner casing (6) and the second inner casing (7); the stator blades (11) are arranged between the fourth outer casing (4) and the second inner casing (7); The centrifugal impeller (12) is arranged between the fifth outer casing (5) and the third inner casing (8); and a drain hole (301) is formed in the surface of the third outer casing (3), and the drain hole (301) faces the punching rotor (10).
  2. 2. The rotary stamping diagonal flow centrifugal combined compressor according to claim 1, wherein a gas collection chamber (13) is further arranged on the outer side of the third outer casing (3), and a switch is arranged on the surface of the gas collection chamber (13) and used for opening or closing the gas collection chamber (13).
  3. 3. A rotary ram diagonal flow centrifugal combined compressor according to claim 2, wherein the plenum (13) overlaps both ends of the third outer casing (3).
  4. 4. A rotary ramjet centrifugal combined compressor according to claim 1, wherein the diffuser mechanism comprises a first housing (14) and a second housing (15); One end of the first shell (14) is connected with the fifth outer casing (5); The second shell (15) is connected with one end of the first shell (14) far away from the fifth outer casing (5).
  5. 5. A rotary ramjet centrifugal combined compressor according to claim 4, characterized in that the first housing (14) overlaps the second housing (15).
  6. 6. A rotary ramjet centrifugal combined compressor according to claim 4, characterized in that said first housing (14) is radially arranged along a fifth outer casing (5) and said second housing (15) is axially arranged along the fifth outer casing (5).
  7. 7. The rotary ramjet centrifugal combined compressor according to claim 4, wherein the first diffuser (16) is mounted inside the first housing (14) and the second diffuser (17) is mounted inside the second housing (15).
  8. 8. Use of a rotary ramjet centrifugal combined compressor according to any of claims 1-7 for a gas turbine engine; The gas turbine engine comprises a reverse flow combustor (18) and a single stage axial flow turbine (19); one end of the backflow combustion chamber (18) is connected with the rotary stamping diagonal flow centrifugal combined compressor, and the other end of the backflow combustion chamber is connected with the single-stage axial flow turbine (19).

Description

Rotary stamping diagonal flow centrifugal combined compressor and application thereof Technical Field The invention belongs to the technical field of turbine engines, and particularly relates to a rotary stamping diagonal flow centrifugal combined compressor and application thereof. Background The centrifugal compressor has the technical characteristics of compact structure, high step pressure ratio and wide stable working range, the tangential speed of the outlet of the centrifugal impeller at present reaches 680m/s, and the design of the structural strength and the service life of the compressor is provided with serious challenges. As shown in figure 1, the existing combined compressor adopts a three-stage axial flow compressor a and a one-stage centrifugal compressor b to be connected together, combines the characteristics of large inlet flow adaptation of an axial flow stage and small flow adaptation of a centrifugal stage, high single-stage pressure ratio and wide stable working range, and can meet the dual requirements of flow and pressure ratio. The axial flow progression of the conventional combined compressor is changed along with the change of the pressure ratio, and the pressure ratio is realized by three-stage axial flow and one-stage centrifugation on the order of 15. However, in order to further increase the pressure ratio, the existing combined compressor can increase the tangential speed of the impeller outlet on one hand, but the tangential speed limited by materials cannot be increased in an infinite way, the total pressure ratio has limited lifting potential, in addition, the high tangential speed is unfavorable for the structural strength and the service life of the compressor, on the other hand, the number of stages of the axial flow compressor can be increased, but the number of stages of the compressor is increased, the size, the weight, the number of parts and the processing time of the compressor are all increased, and finally, the current design method of the axial flow compressor limits the speed of air flow, so that the single-stage pressure ratio is larger and generally not more than 2.2. Disclosure of Invention Aiming at the problems, the invention provides a rotary stamping diagonal flow centrifugal combined compressor and application thereof. In order to achieve the above purpose, the present invention adopts the following technical scheme: A rotary stamping diagonal flow centrifugal combined compressor comprises an outer casing structure, an inner casing structure, a working mechanism and a diffusion mechanism; The outer casing structure and the inner casing structure are revolution bodies; The inner casing structure is positioned in the outer casing structure, and the inner casing structure and the outer casing structure form a working cavity; The working mechanism is arranged in the working cavity and is used for pressurizing air flow; The outer casing structure and the inner casing structure are connected with one end of the diffusion mechanism; The diffusion mechanism comprises a first diffuser and a second diffuser, wherein the first diffuser is used for diffusing along the radial direction of the outer casing structure, and the second diffuser is used for diffusing along the axial direction of the outer casing structure. Preferably, the outer casing structure comprises a first outer casing, a second outer casing, a third outer casing, a fourth outer casing and a fifth outer casing which are sequentially connected; the inner casing structure comprises a first inner casing, a second inner casing and a third inner casing; The first inner casing is positioned inside the first outer casing and the second outer casing; The second inner casing is positioned on the inner side of the fourth outer casing and is connected with the second inner casing; the third inner casing is located inside the fifth outer casing. Preferably, the working mechanism comprises adjustable guide vanes, a punching rotor, stator blades and a centrifugal impeller; the adjustable guide vane is arranged between the second outer casing and the first inner casing; the punching rotor is positioned on the inner side of the third outer casing and between the first inner casing and the second inner casing; The stator blades are arranged between the fourth outer casing and the second inner casing; The centrifugal impeller is mounted between the fifth outer casing and the third inner casing. Preferably, a drain hole is formed in the surface of the third outer casing, and the drain hole faces the punching rotor. Preferably, a gas collection chamber is further arranged on the outer side of the third outer casing, and a switch is arranged on the surface of the gas collection chamber and used for opening or closing the gas collection chamber. Preferably, the gas collection chamber is overlapped with two ends of the third outer casing. Preferably, the diffusion mechanism comprises a first housing and a second housing;