CN116447014A - Centrifugal ventilation structure of aeroengine - Google Patents

Abstract

The invention discloses a centrifugal ventilation structure of an aeroengine, which comprises an oil-gas separator and a gear, wherein the oil-gas separator consists of a hollow rotating shaft and a centrifugal impeller, an air ventilation pipe is fixedly connected to the inner wall of the hollow rotating shaft, an air hole is formed in the inner wall of the air ventilation pipe, an air outlet hole is formed in the inner wall of the hollow rotating shaft, an oil outlet is formed in the side wall of the centrifugal impeller, the outer wall of the air ventilation pipe is rotationally connected with a cooling ring through a bearing, a vent hole is formed in the side wall of the cooling ring, an air inlet is formed in the inner wall of the vent hole, and a wind shield is fixedly connected to the side wall of the hollow rotating shaft. According to the invention, the cooling ring, the spiral condensing pipes and the circulating device are additionally arranged, so that cooling liquid can circularly flow along each spiral condensing pipe through the circulating device in the working process of the oil-gas separator, the heat of lubricating oil can be quickly absorbed, the lubricating oil is cooled, and the temperature of the lubricating oil is prevented from rising to a higher value so as to increase the internal pressure of the lubricating oil cavity of the engine.

Description

Centrifugal ventilation structure of aeroengine

Technical Field

The invention relates to the technical field of aeroengines, in particular to a centrifugal ventilation structure of an aeroengine.

Background

The main bearing sealing system of the aeroengine is sealed by certain air pressure, in the working process of the engine, sealing air can enter a bearing cavity of the lubricating oil system through a sealing device, air and lubricating oil are mixed together in the bearing cavity to form oil mist, and if the oil mist is directly discharged out of the bearing cavity, a large amount of lubricating oil is consumed, and meanwhile, air pollution is caused; for this purpose, oil and gas are separated by centrifugal ventilator using centrifugal force principle, so that the lubricating oil drops mixed in the air can be separated, the air can be discharged from engine by means of hollow shaft and outlet connector, and the lubricating oil can be returned into lubricating oil tank.

For the current centrifugal ventilator structure of the aero-engine, as generally shown in the structure of a split centrifugal ventilator of the aero-engine disclosed in the patent publication No. CN113550828A, the centrifugal impeller is driven to rotate by the engine speed reducer to finally rotate, so that the oil-gas mixture in the gear box can be sucked away, and gas-liquid separation is carried out. In the specific application process, the internal temperature of the engine gear box is higher, oil mist with larger area is formed by the lubricating oil in the dispersion process of the oil-gas mixture, the lubricating oil can be quickly heated to a higher temperature, the internal pressure of the lubricating oil cavity of the engine can be increased by the lubricating oil with high temperature, and the normal operation of an engine lubricating oil system is influenced. Accordingly, the application proposes an aeroengine centrifugal ventilation structure.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and provides a centrifugal ventilation structure of an aeroengine.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the utility model provides an aeroengine centrifugal ventilation structure, includes oil-gas separator and gear, and oil-gas separator comprises hollow pivot and centrifugal impeller, fixedly connected with air ventilation pipe on the hollow pivot inner wall, the gas pocket has been seted up on the air ventilation pipe inner wall, the venthole has been seted up on the hollow pivot inner wall, the oil-out has been seted up on the centrifugal impeller lateral wall, just the air ventilation pipe outer wall is connected with the cooling ring through the bearing rotation, the ventilation hole has been seted up to the lateral wall of cooling ring, the air intake has been seted up on the ventilation hole inner wall, fixedly connected with deep bead on the lateral wall of hollow pivot, each all be equipped with spiral condenser pipe in the ventilation hole, each spiral condenser pipe communicates each other, rotate on the lateral wall of gear and be connected with the drive case, the reservoir is seted up to the lateral wall of drive case, be equipped with the coolant in the reservoir, install the circulating device who makes coolant in the reservoir circulate in spiral condenser pipe in the drive case in the cooling ring lateral wall, fixedly connected with the ring of cooling ring.

Preferably, the circulating device comprises a piston, a liquid outlet pipe and a liquid return pipe, wherein a sliding groove is formed in the side wall of the driving box, the piston is connected in the sliding groove in a sealing sliding mode, the sliding groove is communicated with an adjacent spiral condensing pipe through the liquid outlet pipe, the liquid storage groove is communicated with the adjacent spiral condensing pipe through the liquid return pipe, the sliding groove is communicated with the liquid storage groove through a liquid inlet pipe, a driving mechanism for driving the piston to move up and down is arranged in the driving box, a liquid inlet one-way valve is arranged in the liquid inlet pipe, and a liquid outlet one-way valve is arranged in the liquid outlet pipe.

Preferably, the driving mechanism comprises a driving wheel rotatably connected in the driving box, a driving rod is rotatably connected to the side wall of the driving wheel, the driving rod is connected with the piston through a push rod, and the driving wheel is fixedly connected with the gear through a rotating shaft.

Preferably, one end of the rotating shaft is fixedly connected to the gear shaft center position, and the other end of the rotating shaft is fixedly connected to the driving wheel shaft center position.

Preferably, the upper end of the push rod is rotationally connected with the driving rod, and the lower end of the push rod is fixedly connected with the piston.

Preferably, the cooling fin is embedded on the driving box, and the cooling fin extends into the liquid storage tank, and a knocking mechanism for knocking the cooling fin is arranged in the driving box.

Preferably, the vibration mechanism comprises a driving cylinder fixedly connected to the inner wall of the driving box, a sliding rod is connected in the driving cylinder in a sealing sliding manner, the sliding rod extends into the liquid storage tank, and the driving cylinder is communicated with the sliding groove through an air duct.

The invention has the following beneficial effects:

1. by additionally arranging the cooling ring, the spiral condensing pipes and the circulating device, cooling liquid can circularly flow along each spiral condensing pipe through the circulating device in the working process of the oil-gas separator, so that the heat of lubricating oil can be quickly absorbed, the lubricating oil is cooled, and the temperature of the lubricating oil is prevented from rising to a higher value to increase the internal pressure of an oil-lubricating cavity of an engine;

2. by arranging a plurality of ventilation openings, a plurality of spiral condensing pipes and a plurality of wind shields, the ventilation openings can sequentially and alternately convey the oil-gas mixture in the rotation process of the hollow rotating shaft, and the heat exchange contact time of the oil-gas mixture and the spiral condensing pipes can be prolonged, so that the cooling efficiency of lubricating oil is improved;

3. through setting up fin and knocking the mechanism, the heat with coolant liquid absorbing that exposes that can be quick distributes away through the fin is external, beats the mechanism and constantly beats the fin simultaneously, also can break up the coolant liquid of inflow to increase the heat transfer area of fin and coolant liquid, thereby further improve the cooling rate to the coolant liquid, make the coolant liquid can last the heat of absorbing the lubricating oil.

Drawings

Fig. 1 is a schematic structural view of a centrifugal ventilation structure of an aeroengine according to the present invention;

fig. 2 is a schematic side structural view of an oil-gas separator in a centrifugal ventilation structure of an aero-engine according to the present invention;

FIG. 3 is a schematic side view of a cooling ring according to the present invention;

FIG. 4 is a schematic side view of a cooling ring, hollow shaft and wind deflector according to the present invention;

FIG. 5 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 6 is an enlarged schematic view of the structure at B in FIG. 1;

fig. 7 is a schematic side view of the driving wheel, driving rod and pushing rod according to the present invention.

In the figure: the device comprises a gear 1, an oil-gas separator 2, a hollow rotating shaft 201, a centrifugal impeller 202, a cooling ring 3, a vent hole 4, a spiral condensing pipe 5, an air inlet 6, a wind shield 7, a driving box 8, an air hole 9, an air outlet hole 10, an oil outlet 11, a rotating shaft 12, a driving wheel 13, a driving rod 14, an air ventilation pipe 15, a liquid storage tank 16, a push rod 17, a sliding groove 18, a piston 19, a liquid outlet pipe 20, a liquid inlet pipe 21, a liquid return pipe 22, a driving cylinder 23, a sliding rod 24, a cooling fin 25, a gas guide pipe 26 and a wind shield ring 27.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.

Referring to fig. 1-7, an aeroengine centrifugal ventilation structure comprises an oil-gas separator 2 and a gear 1, wherein the oil-gas separator 2 is composed of a hollow rotating shaft 201 and a centrifugal impeller 202, an air vent pipe 15 is fixedly connected to the inner wall of the hollow rotating shaft 201, an air hole 9 is formed in the inner wall of the air vent pipe 15, an air outlet hole 10 is formed in the inner wall of the hollow rotating shaft 201, an oil outlet 11 is formed in the side wall of the centrifugal impeller 202, and it is noted that the oil-gas separator 2 and the arrangement of the air outlet hole 9, the air outlet hole 10 and the oil outlet 11 are the same as the structure of the aeroengine split centrifugal ventilator disclosed in the patent publication No. CN113550828A in the background art, and the centrifugal impeller 202 is driven to rotate to generate a horizontal suction force to suck an oil-gas mixture into the centrifugal impeller 202, and then gas-liquid separation is carried out by centrifugal force generated when the centrifugal impeller 202 rotates at a high speed.

Referring to fig. 1, and air ventilation pipe 15 outer wall is connected with cooling ring 3 through the bearing rotation, ventilation hole 4 has been seted up to cooling ring 3's lateral wall, air intake 6 has been seted up on ventilation hole 4 inner wall, fixedly connected with deep bead 7 on hollow pivot 201's the lateral wall, all be equipped with spiral condenser pipe 5 in each ventilation hole 4, each spiral condenser pipe 5 communicates each other, rotate on gear 1's the lateral wall and be connected with drive case 8, reservoir 16 is seted up to drive case 8's lateral wall, be equipped with the coolant liquid in reservoir 16, install the circulating device who makes the coolant liquid in reservoir 16 circulate in spiral condenser pipe 5 in the drive case 8, fixedly connected with ring 27 keeps out the wind on cooling ring 3 lateral wall. It should be noted that, through setting up wind guard ring 27, can guarantee that centrifugal impeller 202 is inhaled all the time by the oil gas mixture that ventilation hole 4 provided to make the nearby oil gas mixture of device all pass through ventilation hole 4, and cooled down by spiral condenser pipe 5 in ventilation hole 4, can effectually cool down the lubricating oil that flows back to in the engine speed reducer box like this.

Referring to fig. 6, the circulation device includes a piston 19, a liquid outlet pipe 20 and a liquid return pipe 22, a chute 18 is provided on the side wall of the driving box 8, the piston 19 is connected in the chute 18 in a sealing and sliding manner, the chute 18 is communicated with an adjacent spiral condensation pipe 5 through the liquid outlet pipe 20, the liquid storage tank 16 is communicated with the adjacent spiral condensation pipe 5 through the liquid return pipe 22, the chute 18 is communicated with the liquid storage tank 16 through a liquid inlet pipe 21, and a driving mechanism for driving the piston 19 to move up and down is installed in the driving box 8. The driving mechanism comprises a driving wheel 13 rotatably connected in the driving box 8, a driving rod 14 is rotatably connected on the side wall of the driving wheel 13, a liquid inlet one-way valve is arranged in the liquid inlet pipe 21, a liquid outlet one-way valve is arranged in the liquid outlet pipe 20, specifically, the liquid inlet one-way valve only allows cooling liquid to flow into the sliding groove 18 from the liquid storage groove 16, and the liquid outlet one-way valve only allows cooling liquid to flow into the liquid outlet pipe 20 from the sliding groove 18.

Referring to fig. 1, 6 and 7, the driving rod 14 is connected to the piston 19 via the push rod 17, and the driving wheel 13 is fixedly connected to the gear 1 via the rotation shaft 12. One end of the rotating shaft 12 is fixedly connected with the axis position of the gear 1, and the other end of the rotating shaft 12 is fixedly connected with the axis position of the driving wheel 13. The upper end of the push rod 17 is rotationally connected with the driving rod 14, and the lower end of the push rod 17 is fixedly connected with the piston 19. The driving wheel 13, the driving rod 14 and the push rod 17 can be similar to a crank block mechanism, and when the driving wheel 13 rotates, the push rod 17 can push the lower piston 19 to reciprocate up and down.

Referring to fig. 1 and 5, a cooling fin 25 is embedded in the driving case 8, the cooling fin 25 extends into the liquid storage tank 16, and a knocking mechanism for knocking the cooling fin 25 is installed in the driving case 8. The vibration mechanism comprises a driving cylinder 23 fixedly connected to the inner wall of the driving box 8, a sliding rod 24 is connected in the driving cylinder 23 in a sealing sliding manner, the sliding rod 24 extends into the liquid storage tank 16, and the driving cylinder 23 is communicated with the sliding groove 18 through an air duct 26. It should be noted that, the sliding rod 24 slides through the inner wall of the liquid storage tank 16 and extends into the liquid storage tank 16, and by arranging the air duct 26, when the piston 19 moves upwards, air above the piston 19 can be squeezed into the driving cylinder 23 along the air duct 26, so that the sliding rod 24 can be pushed to move rightwards, and when the piston 19 moves downwards, air in the driving cylinder 23 can be pumped back, so that the sliding rod 24 can be pulled to move leftwards by utilizing negative pressure, and then the sliding rod 24 can continuously strike the cooling fin 25 when moving leftwards and rightwards so as to break up the cooling liquid sprayed onto the cooling fin 25, and the heat exchange area between the two cooling liquids is increased.

In the invention, when in installation, the upper part of the gear 1 is meshed with a gear in an aeroengine speed reducer, so that the gear 1 and the oil-gas separator 2 are driven to rotate. During the high-speed rotation of the centrifugal impeller 202 of the oil-gas separator 2, a suction force in the horizontal direction is generated, the oil-gas mixture in the gear box can be sucked in through each vent hole 4 and the air inlet 6, and the oil with larger specific gravity is thrown out from the oil outlet 11 and flows back into the gear box casing along with the centrifugal force generated during the rotation of the centrifugal impeller 202, and the air with smaller specific gravity can flow into the air vent pipe 15 through the air outlet holes 10 and the air holes 9, and is discharged to the atmosphere through the air vent pipe 15, which is basically consistent with the existing aircraft engine centrifugal ventilator, so that only a simple description is made.

In addition, when the gear 1 rotates, the driving wheel 13 is driven to rotate together through the rotating shaft 12, so that the piston 19 can be pushed to reciprocate up and down under the action of the driving rod 14 and the push rod 17. When the piston 19 moves upwards, negative pressure can be generated, under the flow limiting effect of the liquid inlet check valve and the liquid outlet check valve, at the moment, only the liquid inlet pipe 21 can pump the cooling liquid in the liquid storage tank 16 into the chute 18, and when the piston 19 moves downwards, only the pumped cooling liquid can be input into the spiral condensation pipes 5 through the liquid outlet pipe 20, the spiral condensation pipes 5 are mutually communicated, and the spiral condensation pipes 5 are communicated with the liquid storage tank 16 through the liquid return pipe 22, so that the cooling liquid finally flowing into the spiral condensation pipes 5 can flow back into the liquid storage tank 16 along the liquid return pipe 22.

Therefore, along with the up-and-down reciprocating movement of the piston 19, the cooling liquid in the liquid storage tank 16 can continuously circulate along the paths of the liquid storage tank 16, the liquid inlet pipe 21, the sliding groove 18, the liquid outlet pipe 20, the spiral condensing pipe 5, the liquid return pipe and the liquid storage tank 16, so that the heat of the oil-gas mixture entering each ventilation hole 4 is absorbed, the purpose of cooling is achieved, the oil is effectively prevented from rising to a higher temperature, and the pressure in the oil cavity of the engine is prevented from increasing after the oil flows back to the engine speed reducer casing.

In addition, it should be noted that when the hollow rotating shaft 201 rotates, the external wind shields 7 are driven to rotate together, and in the rotating process of the wind shields 7, as shown in fig. 4, the wind shields 7 can block each air inlet 6 in sequence, then each air inlet 6 will sequentially input the oil-gas mixture, when a certain air inlet 6 is blocked by the wind shields 7, the oil-gas mixture in the air inlet 6 and the air vent 4 stops flowing, so that the heat exchange contact time between the oil-gas mixture in each air vent 4 and the spiral condensing tube 5 can be effectively prolonged, the cooling effect of the cooling liquid is increased, the whole temperature of the lubricating oil is further prevented from rising to a higher value, and because the number of the wind shields 7 is less than the number of the air inlets 6, the air inlet 6 can smoothly convey the oil-gas mixture to the oil-gas separator 2 all the time, and therefore the separation efficiency of the oil-gas mixture cannot be reduced.

Further, when the reflowed cooling liquid flows back into the liquid storage tank 16 along the liquid return pipe 22, the reflowed cooling liquid is sprayed onto the surface of the cooling fin 25, and the upper end of the cooling fin 25 can exchange heat with the external atmosphere externally, so that the cooling liquid can be timely cooled, and the cooling liquid can continuously absorb the heat of lubricating oil. More prominently, when the piston 19 moves up and down, air above the piston can be continuously input into the driving cylinder 23 through the air duct 26, or the air in the driving cylinder 23 is pumped into the sliding groove 18, so that the sliding rod 24 can be pushed by air pressure to move back and forth along the horizontal direction, the sliding rod 24 can continuously strike the cooling fin 25, so that the cooling liquid sprayed to the surface of the cooling fin 25 can be dispersed, the contact heat exchange area of the cooling liquid and the cooling fin 25 is further increased, the cooling speed of the cooling liquid is increased, the cooling liquid can be cooled down rapidly, and the heat of the lubricating oil can be absorbed stably and continuously.

The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.

Claims (7)

1. The utility model provides an aeroengine centrifugal ventilation structure, includes oil-gas separator (2) and gear (1), and oil-gas separator (2) are by hollow pivot (201) and centrifugal impeller (202) are constituteed, a serial communication port, fixedly connected with air ventilation pipe (15) on hollow pivot (201) inner wall, air vent (9) have been seted up on air ventilation pipe (15) inner wall, air vent (10) have been seted up on hollow pivot (201) inner wall, oil-out (11) have been seted up on centrifugal impeller (202) lateral wall, just air ventilation pipe (15) outer wall is connected with cooling ring (3) through the bearing rotation, ventilation hole (4) have been seted up on cooling ring (3) lateral wall vent (4) inner wall, fixedly connected with wind deflector (7) on hollow pivot (201) lateral wall, each ventilation hole (4) are interior all to be equipped with spiral condenser pipe (5), each spiral condenser pipe (5) are linked together, rotate on gear (1) lateral wall and are connected with driving case (8), driving case (8) lateral wall sets up reservoir (16), cooling liquid circulation device (16) are equipped with in driving case (16) circulation device in cooling liquid circulation tank (16), and a wind shielding ring (27) is fixedly connected to the side wall of the cooling ring (3).

2. The centrifugal ventilation structure of an aeroengine according to claim 1, wherein the circulating device comprises a piston (19), a liquid outlet pipe (20) and a liquid return pipe (22), a sliding groove (18) is formed in the side wall of the driving box (8), the piston (19) is in sealing sliding connection in the sliding groove (18), the sliding groove (18) is communicated with an adjacent spiral condensing pipe (5) through the liquid outlet pipe (20), the liquid storage groove (16) is communicated with the adjacent spiral condensing pipe (5) through the liquid return pipe (22), the sliding groove (18) is communicated with the liquid storage groove (16) through a liquid inlet pipe (21), a driving mechanism for driving the piston (19) to move up and down is arranged in the driving box (8), a liquid inlet one-way valve is arranged in the liquid inlet pipe (21), and a liquid outlet one-way valve is arranged in the liquid outlet pipe (20).

3. An aeroengine centrifugal ventilation structure according to claim 2, wherein the driving mechanism comprises a driving wheel (13) rotatably connected in a driving box (8), a driving rod (14) is rotatably connected to the side wall of the driving wheel (13), the driving rod (14) is connected with a piston (19) through a push rod (17), and the driving wheel (13) is fixedly connected with the gear (1) through a rotating shaft (12).

4. An aeroengine centrifugal ventilation structure according to claim 3, wherein one end of the rotating shaft (12) is fixedly connected to the axial position of the gear (1), and the other end of the rotating shaft (12) is fixedly connected to the axial position of the driving wheel (13).

5. A centrifugal ventilation structure for an aeroengine according to claim 3, wherein the upper end of the push rod (17) is rotatably connected with the driving rod (14), and the lower end of the push rod (17) is fixedly connected with the piston (19).

6. An aeroengine centrifugal ventilation structure according to claim 2, wherein the cooling fins (25) are embedded on the driving box (8), the cooling fins (25) extend into the liquid storage tank (16), and a knocking mechanism for knocking the cooling fins (25) is installed in the driving box (8).

7. An aircraft engine centrifugal ventilation structure according to claim 6, wherein the vibration mechanism comprises a driving cylinder (23) fixedly connected to the inner wall of the driving box (8), a sliding rod (24) is connected in the driving cylinder (23) in a sealing sliding manner, the sliding rod (24) extends into the liquid storage tank (16), and the driving cylinder (23) is communicated with the sliding groove (18) through an air duct (26).