Turbine cooling air entraining device

Abstract

The utility model discloses a turbine cooling air entraining device. Comprising a ventilation cooling guide pipe (2) and a ventilation cooling guide pipe connector (6). The ventilation cooling guide pipe air outlet (9) is inserted into the ventilation cooling guide pipe connecting port (6); a spring fixing upper corner box (5a) is arranged in the circumferential direction of the outer pipe wall of the ventilation cooling guide pipe (2) close to one end of the ventilation cooling guide pipe air outlet (9); a spring fixing lower corner box (5b) is arranged on the outer wall of the ventilation cooling guide pipe connecting port (6) in the circumferential direction; the spring fixing upper corner box and the spring fixing lower corner box are connected through a spring fixing stud (4); and the spring fixing stud (4) between the spring fixing upper corner box and the spring fixing lower corner box is provided with a spring (3). The utility model has the characteristic of good air tightness.

Description

Technical Field

[0001] The utility model belongs to the technical field of cooling air bleed of aircraft auxiliary power devices, and relates to a turbine cooling air bleed device. Background Art

[0002] The bleed air cooling method of the aircraft auxiliary power unit is closely related to the flight safety of the aircraft. A good bleed air cooling device for the auxiliary power unit has a good effect on cooling the aircraft engine, thereby reducing the adverse factors caused by overheating of the turbine gas engine, ensuring the normal operation of the auxiliary power unit and ensuring flight safety.

[0003] For aircraft auxiliary power units, a cooling method with bleed air is used. Bleed air cooling can accelerate the circulation of cold air, thereby accelerating the amount of cold air per unit volume, and better cooling the gas turbine engine. However, the current purely rigid connection structure between the bleed air duct outlet and the joint has the disadvantages of inconvenience in connection, and poor air tightness at the joint connection due to the vibration generated by the engine itself when it is working, which cannot ensure good air tightness. Summary of the invention

[0004] The purpose of the utility model is to provide a turbine cooling air bleed device. The utility model has the characteristics of good air tightness.

[0005] Technical solution. A turbine cooling air induction device comprises a ventilation cooling duct and a ventilation cooling duct connection port; the ventilation cooling duct air outlet is inserted into the ventilation cooling duct connection port; a spring-fixed upper corner box is circumferentially provided on the outer tube wall of the ventilation cooling duct near one end of the ventilation cooling duct air outlet; a spring-fixed lower corner box is circumferentially provided on the outer wall of the ventilation cooling duct connection port; the spring-fixed upper and lower corner boxes are connected via spring-fixed screw piles; the spring-fixed screw piles between the spring-fixed upper and lower corner boxes are provided with springs.

[0006] In the aforementioned turbine cooling air induction device, the spring is in a pre-compressed state.

[0007] In the aforementioned turbine cooling air induction device, the air outlet of the ventilation and cooling duct is provided with a limiting lip, and the limiting lip abuts against the bottom end of the inner tube of the ventilation and cooling duct connection port.

[0008] In the aforementioned turbine cooling air induction device, the ventilation cooling duct connection port is a petal structure.

[0009] In the aforementioned turbine cooling air induction device, nuts are connected to both ends of the spring fixing screw.

[0010] In the aforementioned turbine cooling air induction device, both ends of the spring fixing screw are also provided with anti-loosening cotter pins.

[0011] Beneficial Effects

[0012] The utility model provides a turbine cooling air bleed device, which mainly comprises a ventilation cooling duct, a metal spring, a spring fixing screw, a spring fixing upper corner box, a spring fixing lower corner box, a ventilation cooling duct connecting port, a nut, and a cotter pin; the structure can make the air bleed device port have good sealing and elasticity, wherein the installation of the spring also plays a shock absorbing role, and also ensures better cooling air bleed and a more flexible installation structure.

[0013] The utility model has a more flexible installation and a certain degree of shock absorption effect under the action of the spring, so that the airtight effect at the joint is good. It can effectively solve the problems of short service life, easy aging, cracking and derailment of aviation cotton braided hose at the connection of the engine ventilation and cooling system, thereby ensuring flight safety.

[0014] The utility model can be installed flexibly. When the contact distance is too short or too long during installation, the deformation of the spring can be adjusted to compensate for it. Due to the presence of the spring, it also has a certain shock-absorbing effect on this basis, thereby ensuring the reliability of the ventilation and cooling system. The utility model has a simple structure, is easy to disassemble and assemble, and has good interchangeability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the structural diagram of the turbine cooling air bleed device;

[0016] Figure 2 This is the connection diagram of the interface. DETAILED DESCRIPTION

[0017] A turbine cooling air bleed device of the utility model is described in detail with reference to the accompanying drawings:

[0018] Embodiment 1. A turbine cooling air induction device, comprising: Figure 1-Figure 2 As shown, it includes a ventilation cooling duct 2 and a ventilation cooling duct connection port 6; a ventilation cooling duct air outlet 9 is inserted into the ventilation cooling duct connection port 6; a spring fixing upper corner box 5a is provided on the outer tube wall of the ventilation cooling duct 2 near one end of the ventilation cooling duct air outlet 9; a spring fixing lower corner box 5b is provided on the outer wall of the ventilation cooling duct connection port 6 along the circumference; the spring fixing upper and lower corner boxes are connected via spring fixing screw piles 4; the spring fixing screw piles 4 between the spring fixing upper and lower corner boxes are provided with springs 3. When the engine is working and vibrates, the spring 3 will be compressed / expanded along the spring fixing screw piles 4, thereby achieving the purpose of absorbing vibration.

[0019] The aforementioned spring 3 is in a pre-compressed state.

[0020] The aforementioned ventilation and cooling duct air outlet 9 is provided with a limiting lip 1 , and the limiting lip 1 abuts against the bottom end of the inner tube of the ventilation and cooling duct connection port 6 .

[0021] The aforementioned ventilation and cooling duct connection port 6 is a petal structure.

[0022] Both ends of the aforementioned spring fixing screw pile 4 are connected with nuts 7 .

[0023] Anti-loosening cotter pins 8 are also provided at both ends of the aforementioned spring fixing screw pile 4.

Claims

1. A turbine cooling air bleed device, characterized in that: The invention comprises a ventilation cooling duct (2) and a ventilation cooling duct connection port (6); a ventilation cooling duct air outlet (9) is inserted into the ventilation cooling duct connection port (6); a spring-fixed upper corner box (5a) is circumferentially provided on the outer tube wall of the ventilation cooling duct (2) near one end of the ventilation cooling duct air outlet (9); a spring-fixed lower corner box (5b) is circumferentially provided on the outer wall of the ventilation cooling duct connection port (6); the spring-fixed upper and lower corner boxes are connected via spring-fixed screw piles (4); and the spring-fixed screw piles (4) between the spring-fixed upper and lower corner boxes are provided with springs (3).

2. The turbine cooling air bleed device according to claim 1, characterized in that: The spring (3) is in a pre-compression state.

3. The turbine cooling air bleed device according to claim 2, characterized in that: The ventilation and cooling duct air outlet (9) is provided with a limiting lip (1), and the limiting lip (1) abuts against the bottom end of the inner tube of the ventilation and cooling duct connection port (6).

4. The turbine cooling air bleed device according to claim 3, characterized in that: The ventilation and cooling duct connection port (6) is in a petal structure.

5. The turbine cooling air bleed device according to claim 1, characterized in that: Nuts (7) are connected to both ends of the spring fixing screw pile (4).

6. The turbine cooling air bleed device according to claim 5, characterized in that: Anti-loosening cotter pins (8) are also provided at both ends of the spring fixing screw pile (4).

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