CN115898643A - Oil-gas separation structure - Google Patents

Abstract

The invention relates to the technical field of aero-engines, in particular to an oil-gas separation structure. An oil and gas separation structure comprising: the engine bearing seat is internally provided with a bearing cavity; the transmission shaft is arranged in the bearing cavity, a ventilation shaft is fixedly arranged in the transmission shaft, a channel for oil-gas mixture to flow is formed in the ventilation shaft, and the ventilation shaft is suitable for separating lubricating oil in the oil-gas mixture through centrifugal force; the ventilation assembly is fixedly arranged on one side of the bearing seat of the engine and located at one end of the ventilation shaft, the ventilation assembly comprises a shell, a cavity for oil-gas separation is formed in the shell, the ventilation shaft is communicated with the shell, an oil-gas mixture enters the shell through the ventilation shaft, the shell is provided with an air outlet, the air outlet is communicated with a tail nozzle, and oil in the oil-gas mixture is suitable for falling to the bottom of the shell through gravity.

Description

Oil-gas separation structure

Technical Field

The invention relates to the technical field of aero-engines, in particular to an oil-gas separation structure.

Background

At current aeroengine, among the gas turbine structure, can be provided with a plurality of bearings on the transmission shaft, the transmission shaft can drive the bearing and rotate together when rotating, the bearing rotates for a long time and can lead to the bearing temperature to improve, reduce the bearing life-span, consequently, have the device of spouting the lubricating oil for the bearing in the bearing frame, the lubricating oil can reduce the temperature of bearing and play lubricated effect, thereby play the effect of protection bearing, there is the ball that sprays to the bearing to splash, form oil-gas mixture after the lubricating oil that splashes and the air mixture in the bearing frame, need carry out oil-gas separation to oil-gas mixture, the lubricating oil in the recovery oil-gas mixture carries out the reutilization.

In the prior art, the oil-gas separation of the oil-gas mixture in the bearing cavity is mainly realized by an oil-gas injection pipeline outside the main machine body and an oil-gas separator on the accessory gearbox, and the oil-gas mixture in the bearing cavity is sucked out to the oil-gas separator to realize the separation, but the oil-gas separator and the oil-gas injection pipe can increase the overall complexity and weight of the engine, and finally the performance of the high-performance engine is influenced.

Disclosure of Invention

Therefore, the invention aims to solve the technical problem that the oil-gas separator and the oil-gas injection pipe in the prior art can increase the overall complexity and weight of the engine and finally influence the performance of the high-performance engine, thereby providing the oil-gas separation structure.

In order to solve the above problems, the present invention provides an oil-gas separation structure, comprising:

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An engine bearing mount having a bearing cavity therein;

the transmission shaft is arranged in the bearing cavity, a ventilation shaft is fixedly arranged in the transmission shaft, a channel for oil-gas mixture to flow is formed in the ventilation shaft, and the ventilation shaft is suitable for separating oil in the oil-gas mixture through centrifugal force;

the ventilation subassembly is fixed to be set up one side of engine bearing frame, and is located the one end of ventilation axle, the ventilation subassembly includes the casing, the cavity that has oil-gas separation in the casing, the ventilation axle with the casing intercommunication, oil-gas mixture passes through the ventilation axle gets into in the casing, the casing has the air outlet, air outlet and tail-nozzle intercommunication, oil in the oil-gas mixture is suitable for and drops through gravity the bottom of casing.

Further, a ventilation pipe is arranged in the shell, the ventilation pipe is provided with an outlet with a downward opening, the ventilation pipe is communicated with the ventilation shaft, and the oil-gas mixture in the ventilation shaft is suitable to enter the shell through the ventilation pipe.

Furthermore, the outer diameter of the ventilation pipe is smaller than the inner diameter of the transmission shaft, the ventilation pipe is inserted into the transmission shaft, a gap is formed between the ventilation pipe and the transmission shaft, the oil-gas mixture in the bearing cavity is suitable for entering the ventilation pipe through the gap, and the lubricating oil in the ventilation shaft flows into the bearing cavity through the gap.

Further, the method also comprises the following steps:

the heat insulation cover plate is arranged on one side, provided with an air outlet, of the shell, the heat insulation cover plate is provided with an annular cavity, an air inlet and an air outlet are respectively formed in the upper end and the lower end of the annular cavity, the air inlet is connected with the air outlet, and the air outlet is communicated with the tail nozzle.

Further, a partition plate is arranged in the shell and is suitable for increasing the circulation distance of the oil-gas mixture.

2 number of customer

Further, an oil return pipe is arranged at the bottom of the shell.

Further, the bottom of the bearing cavity is provided with an oil return port.

Further, the method also comprises the following steps:

and the oil return port and the oil return pipe are respectively connected with the oil return groove.

Furthermore, the periphery of the shell is provided with a plurality of mounting structures, the mounting structures are provided with mounting holes, and the shell is fixedly arranged on the engine bearing seat through the mounting structures.

Furthermore, the periphery of the heat insulation cover plate is provided with a plurality of fixing structures, fixing holes are formed in the fixing structures, and the heat insulation cover plate is fixedly arranged on the exhaust casing through the fixing structures.

The invention has the following advantages:

1. the invention discloses an oil-gas separation structure which comprises an engine bearing seat, a transmission shaft and a ventilation assembly. The engine bearing seat is internally provided with a bearing cavity; the transmission shaft is arranged in the bearing cavity, a ventilation shaft is fixedly arranged in the transmission shaft, a channel for oil-gas mixture to flow is formed in the ventilation shaft, and the ventilation shaft is suitable for separating lubricating oil in the oil-gas mixture through centrifugal force; the ventilation subassembly is fixed to be set up one side of engine bearing frame, and is located the one end of ventilation axle, the ventilation subassembly includes the casing, the cavity that has oil-gas separation in the casing, the ventilation axle with the casing intercommunication, oil-gas mixture passes through the ventilation axle gets into in the casing, the casing has the air outlet, air outlet and jet-tail intercommunication, the lubricating oil in the oil-gas mixture is suitable for and drops through gravity the bottom of casing.

The oil-gas separation structure of the structure has the advantages that the air outlet of the shell is connected with the tail jet pipe of the engine, because the gas flow speed at the outlet part of the tail jet pipe is higher, the pressure is lower than the pressure in the inner part of the bearing cavity, a suction effect is formed on the bearing cavity, the oil-gas mixture in the ventilation shaft is pumped out, meanwhile, the ventilation shaft rotates along with the transmission shaft to generate centrifugal force, and the oil-gas mixture in the ventilation shaft is subjected to oil-gas separation,

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After the oil-gas mixture enters the shell, the oil-gas mixture is separated from the oil-gas mixture due to the gravity of the lubricating oil, so that the oil-gas separation of the oil-gas mixture in the bearing cavity is solved.

2. The oil-gas separation structure of this structure through setting up thermal-insulated apron, makes the exhaust gas in the ventilation pipe internal flow in the annular chamber, and the temperature of the tail nozzle of effectual isolated engine prevents the high temperature of casing and bearing chamber.

3. The oil-gas separation structure of this structure is provided with the baffle in the casing to can increase oil-gas mixture's circulation distance, increase the separation time, make oil-gas mixture separate more thoroughly.

4. The oil-gas separation structure of this structure, the bottom of casing sets up back oil pipe to and bearing cavity bottom has the oil return opening, thereby can retrieve the back with the lubricating oil of separation, the reutilization.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural diagram of an oil-gas separation structure in an embodiment of the invention;

FIG. 2 is a schematic view of the internal structure of the housing in the embodiment of the present invention;

FIG. 3 is a schematic structural view of an insulating cover sheet according to an embodiment of the present invention;

FIG. 4 is a schematic view of an oil-gas flow path of an oil-gas separation structure in an embodiment of the present invention;

description of reference numerals:

1. an engine bearing seat; 2. a bearing cavity; 3. a drive shaft; 4. a ventilation shaft; 5. a housing; 6.

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An air outlet; 7. a ventilation pipe; 8. an outlet; 9. a gap; 10. a heat insulating cover plate; 11. an annular cavity; 12. an air inlet; 13. an air outlet; 14. a partition plate; 15. an oil return pipe; 16. a mounting structure; 17. mounting holes; 18. a fixed structure; 19. a fixing hole; 20. an exhaust casing; 21. and a tail spout.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Furthermore, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

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As shown in fig. 1 to 4, the present embodiment discloses an oil-gas separation structure, which includes an engine bearing seat 1, a transmission shaft 3 and a ventilation assembly. The bearing seat 1 of the engine is internally provided with a bearing cavity 2; the transmission shaft 3 is arranged in the bearing cavity 2, the ventilation shaft 4 is fixedly arranged in the transmission shaft 3, a channel for oil-gas mixture to flow is formed in the ventilation shaft 4, and the ventilation shaft 4 is suitable for separating lubricating oil in the oil-gas mixture through centrifugal force; the fixed one side that sets up at engine bearing frame 1 of ventilation subassembly, and be located the one end of ventilation axle 4, the ventilation subassembly includes casing 5, has oil-gas separation's cavity in the casing 5, ventilation axle 4 and casing 5 intercommunication, and during oil-gas mixture passed through ventilation axle 4 and gets into casing 5, casing 5 had air outlet 6, and air outlet 6 and tail spout 21 intercommunication, oil in the oil-gas mixture was suitable for through gravity drop in the bottom of casing 5.

Specifically, in this embodiment, the engine bearing seat 1 has two bearing cavities 2, the ventilation shaft 4 is communicated with the bearing cavity 2 on the front side, the right end of the ventilation shaft 4 is communicated with the housing 5, the air outlet 6 of the housing 5 is communicated with the rear nozzle 21, the gas flow rate of the rear nozzle 21 is higher, the air pressure is lower than that inside the bearing cavity 2, a suction effect is formed on the bearing cavity 2, the oil-gas mixture in the bearing cavity 2 is sucked into the ventilation shaft 4, the oil-gas mixture enters the housing 5 through the ventilation shaft 4, meanwhile, the ventilation shaft 4 rotates along with the transmission shaft 3 to generate a centrifugal force, the oil-gas mixture in the ventilation shaft 4 is subjected to oil-gas separation, the lubricating oil is thrown onto the inner wall of the ventilation shaft 4 through the centrifugal force, so as to perform primary separation, the remaining oil-gas mixture enters the housing 5 and falls to the bottom of the housing 5 due to the gravity of the lubricating oil, the remaining oil-gas mixture is discharged from the air outlet 6, and is subjected to double separation, the lubricating oil in the oil-gas mixture can be separated to the maximum limit, so as to effectively reduce pollution, and the secondary utilization of the recovered lubricating oil.

Further, the shell 5 is internally provided with a vent pipe 7, the vent pipe 7 is provided with an outlet 8 which is opened downwards, the vent pipe 7 is communicated with the vent shaft 4, and the oil-gas mixture in the vent shaft 4 is suitable for entering the shell 5 through the vent pipe 7.

Specifically, as shown in fig. 2, the ventilation pipe 7 is arranged coaxially with the housing 5, and the right end 6 of the ventilation pipe 7 is numbered by customer

Fixed setting is in casing 5, and ventilation pipe 7 and ventilation shaft 4 intercommunication do not connect nevertheless, have the interval between the left end of ventilation pipe 7 and the right-hand member of ventilation shaft 4, and the oil gas mixture in the ventilation shaft 4 can be inhaled ventilation pipe 7, and the right-hand member of ventilation pipe 7 is provided with the decurrent opening of opening, and oil gas mixture accessible opening gets into casing 5, and the below opening can increase the circulation distance of oil gas mixture in casing 5, increases the separation time.

Further, the outer diameter of the ventilation pipe 7 is smaller than the inner diameter of the transmission shaft 3, the ventilation pipe 7 is inserted into the transmission shaft 3, a gap 9 is formed between the ventilation pipe 7 and the transmission shaft 3, the oil-gas mixture in the bearing cavity 2 is suitable to enter the ventilation pipe 7 through the gap 9, and the lubricating oil in the ventilation shaft 4 flows into the bearing cavity 2 through the gap 9.

Specifically, as shown in fig. 1, the outer diameter of the ventilation pipe 7 is smaller than the inner diameter of the transmission shaft 3, the length of the ventilation shaft 4 is smaller than the length of the transmission shaft 3, the ventilation pipe 7 can be inserted into the transmission shaft 3 and is communicated with the ventilation shaft 4, a gap 9 is formed between the ventilation pipe 7 and the transmission shaft 3, an oil-gas mixture in the bearing cavity 2 on the rear side can enter the ventilation pipe 7 through the gap 9 and enter the housing 5 from the ventilation pipe 7, and an oil-gas mixture in the bearing cavity 2 on the front side can flow into the bearing cavity 2 through the gap 9 due to centrifugal force when passing through the ventilation shaft 4.

In this embodiment, the engine bearing block 1 has two bearing cavities 2, the left end of the ventilation shaft 4 is communicated with the front bearing cavity 2, and the rear bearing cavity 2 is communicated with the ventilation shaft 4 through the gap 9.

Further, the method also comprises the following steps: an insulating cover panel 10. The heat insulation cover plate 10 is arranged on one side, provided with the air outlet 6, of the shell 5, the heat insulation cover plate 10 is provided with an annular cavity 11, an air inlet 12 and an air outlet 13 are respectively arranged at the upper end and the lower end of the annular cavity 11, the air inlet 12 is connected with the air outlet 6, and the air outlet 13 is communicated with the tail nozzle 21.

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Specifically, as shown in fig. 1 and 3, the heat insulation cover plate 10 is disposed on the right side of the casing 5, the inner diameter of the annular cavity 11 is larger than the outer diameter of the casing 5, the air inlet 12 of the annular cavity 11 corresponds to the air outlet 6 of the casing 5, the oil-gas mixture discharged from the air outlet 6 enters the annular cavity 11 through the air inlet 12, flows in the annular cavity 11 and is discharged from the air outlet 13 at the bottom of the annular cavity 11, the air outlet 13 is communicated with the tail nozzle 21, and the oil-gas mixture is pumped out through pressure difference. Because the temperature of the jet nozzle 21 is higher, the service life of the shell 5 is influenced by overhigh temperature, and when the oil-gas mixture flows in the annular cavity 11, a part of heat can be absorbed, so that the temperature is reduced.

Further, a partition 14 is provided in the housing 5, the partition 14 being adapted to increase the distance of flow of the oil-gas mixture.

Specifically, as shown in fig. 2, the partition 14 is disposed at the lower end of the air outlet 6, the partition 14 is an arc-shaped plate, and the partition 14 can block the oil-gas mixture, increase the circulation distance of the oil-gas mixture, and increase the separation time of the oil-gas mixture.

Preferably, in this embodiment, the housing 5 has two air outlets 6 therein, and the air outlets 6 are kidney-shaped holes.

Further, the bottom of the housing 5 is provided with an oil return pipe 15.

Have, as shown in fig. 1, oil return pipe 15 has oil feed section and the section of producing oil, and the oil feed section sets up with casing 5 is perpendicular, and the right-hand member of oil feed section is connected with the left side wall of casing 5 bottom to with casing 5 intercommunication, the section of producing oil and casing 5 parallel arrangement, the upper end and the left end of oil feed section of producing oil are connected.

Further, the bottom of the bearing cavity 2 is provided with an oil return port.

Further, the method also comprises the following steps: and an oil return groove. The oil return port and the oil return pipe 15 are respectively connected with the oil return groove.

Specifically, the bottom of the bearing cavity 2 at the rear end is provided with an oil return port. The oil recovered from the oil return port and the oil return pipe 15 enters the oil return groove and is stored.

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Further, a plurality of mounting structures 16 are arranged on the periphery of the housing 5, mounting holes 17 are formed in the mounting structures 16, and the housing 5 is fixedly arranged on the engine bearing seat 1 through the mounting structures 16.

Preferably, the periphery of the housing 5 is provided with three mounting structures 16, the three mounting structures 16 are uniformly arranged along the circumferential direction of the housing 5, each mounting structure 16 is provided with a mounting hole 17, and the housing 5 is fixedly arranged on the engine bearing seat 1 by matching with the mounting hole 17 through bolts. In alternative embodiments, the outer periphery of the housing 5 may be provided with other numbers of mounting structures 16, such as four or five.

Further, the periphery of the heat insulation cover plate 10 is provided with a plurality of fixing structures 18, fixing holes 19 are formed in the fixing structures 18, and the heat insulation cover plate 10 is fixedly arranged on the exhaust casing 20 through the fixing structures 18.

Preferably, the periphery of the heat insulation cover plate 10 is provided with eight fixing structures 18, the eight fixing structures 18 are uniformly arranged along the circumferential direction of the heat insulation cover plate 10, each fixing structure 18 is provided with a fixing hole 19, the exhaust casing 20 is arranged on the outer side of the bearing seat, and the heat insulation cover plate 10 is fixedly arranged on the exhaust casing 20 through the matching of bolts and the fixing holes 19 and is fixedly connected with the shell 5. In alternative embodiments, the periphery of the insulating thermal cover panel 10 may be provided with seven or nine, among other numbers of securing structures 18.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications derived therefrom are intended to be within the scope of the invention.

Claims (10)

1. An oil-gas separation structure, comprising:

the engine bearing seat (1), wherein a bearing cavity (2) is arranged in the engine bearing seat (1);

the transmission shaft (3) is arranged in the bearing cavity (2), a ventilation shaft (4) is fixedly arranged in the transmission shaft (3), a channel for oil-gas mixture to flow is arranged in the ventilation shaft (4), and the ventilation shaft (4) is suitable for separating lubricating oil in the oil-gas mixture through centrifugal force;

the ventilation subassembly is fixed to be set up one side of engine bearing frame (1), and is located the one end of ventilation axle (4), the ventilation subassembly includes casing (5), the cavity that has oil-gas separation in casing (5), ventilation axle (4) with casing (5) intercommunication, oil-gas mixture passes through ventilation axle (4) gets into in casing (5), casing (5) have air outlet (6), air outlet (6) and tail spout (21) intercommunication, oil in the oil-gas mixture is suitable for dropping through gravity the bottom of casing (5).

2. The oil-gas separation structure of claim 1,

the shell (5) is internally provided with a ventilation pipe (7), the ventilation pipe (7) is provided with an outlet (8) with a downward opening, the ventilation pipe (7) is communicated with the ventilation shaft (4), and the oil-gas mixture in the ventilation shaft (4) is suitable for entering the shell (5) through the ventilation pipe (7).

3. The oil-gas separation structure of claim 2,

the outer diameter of the ventilation pipe (7) is smaller than the inner diameter of the transmission shaft (3), the ventilation pipe (7) is inserted into the transmission shaft (3), a gap (9) is formed between the ventilation pipe (7) and the transmission shaft (3), an oil-gas mixture in the bearing cavity (2) is suitable for entering the ventilation pipe (7) through the gap (9), and lubricating oil in the ventilation shaft (4) flows into the bearing cavity (2) through the gap (9).

4. The oil and gas separation structure according to claim 1, further comprising:

thermal-insulated apron (10), thermal-insulated apron (10) set up casing (5) have one side of air outlet (6), thermal-insulated apron (10) have annular cavity (11), the upper and lower both ends of annular cavity (11) are provided with air inlet (12) and gas outlet (13) respectively, air inlet (12) with air outlet (6) are connected, gas outlet (13) and tail spout (21) intercommunication.

5. The oil-gas separation structure according to claims 1 to 4, wherein:

a partition plate (14) is arranged in the shell (5), and the partition plate (14) is suitable for increasing the circulation distance of the oil-gas mixture.

6. The oil-gas separation structure according to claim 5, wherein:

an oil return pipe (15) is arranged at the bottom of the shell (5).

7. The oil and gas separation structure according to claim 6, wherein:

the bottom of the bearing cavity (2) is provided with an oil return port.

8. The oil and gas separation structure of claim 7, further comprising:

and the oil return port and the oil return pipe (15) are respectively connected with the oil return groove.

9. The oil and gas separation structure according to claim 1,

the periphery of casing (5) is provided with a plurality of mounting structure (16), mounting structure (16) are last to have mounting hole (17), casing (5) pass through mounting structure (16) and fix the setting on engine bearing seat (1).

10. The oil and gas separation structure according to claim 4, wherein:

the periphery of the heat insulation cover plate (10) is provided with a plurality of fixing structures (18), fixing holes (19) are formed in the fixing structures (18), and the heat insulation cover plate (10) is fixedly arranged on an exhaust casing (20) through the fixing structures (18).

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