CN110714837A - Turbojet engine lubricating oil system - Google Patents
Turbojet engine lubricating oil system Download PDFInfo
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- CN110714837A CN110714837A CN201911080367.8A CN201911080367A CN110714837A CN 110714837 A CN110714837 A CN 110714837A CN 201911080367 A CN201911080367 A CN 201911080367A CN 110714837 A CN110714837 A CN 110714837A
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- joint
- lubricating oil
- oil
- block body
- valve block
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/06—Arrangements of bearings; Lubricating
Abstract
The invention relates to the technical field of small-sized turbojet engines, in particular to a turbojet engine lubricating oil system, which is used for solving the problems that the small-sized turbojet engine lubricating oil system in the prior art has a dripping phenomenon in a static state and has air plug hidden danger. The variable throttle valve comprises a lubricating oil tank, a variable throttle valve, a lubricating oil pump and an engine, wherein the variable throttle valve comprises a valve block body, an atmosphere communicating joint and an upper throttle joint which are mutually communicated are mounted on the valve block body, the atmosphere communicating joint is connected with an atmosphere communicating pipe extending to the inner top of the lubricating oil tank, a lower throttle joint which is communicated with the upper throttle joint and has a flow resistance effect is mounted in the valve block body, and the variable throttle valve is further connected with an inner oil suction pipe which extends to the inner lower part of the lubricating oil tank and is communicated with the lower throttle joint. Resistance behind the pump can be reduced through above-mentioned technical scheme, the gas lock problem of booster pump has been reduced to and the dribbling phenomenon of lubricating oil can be reduced.
Description
Technical Field
The invention relates to the technical field of small turbojet engines, in particular to a turbojet engine lubricating oil system.
Background
The lubricating oil system is an important component of a small turbojet engine, and the lubricating oil system of the small turbojet engine at present only consists of a lubricating oil tank, a lubricating oil pump and a pipeline system. The adoption of the lubricating oil system can cause the lubricating oil to leak when the lubricating oil tank stores the oil, and the workload of product maintenance is increased after the oil leakage occurs.
When the lubricating oil in the lubricating oil tank and the lubricating oil inlet pipe is leaked, air exists in the lubricating oil inlet pipe and the lubricating oil pump, and after the lubricating oil is refilled into the lubricating oil tank, a section of air column is formed between the lubricating oil inlet pipe and the lubricating oil pump inlet pipe. Therefore, a system capable of reducing the static leakage of the lubricating oil system of the small turbojet engine and reducing the hidden danger of the air plug is urgently needed.
Disclosure of Invention
Based on the problems, the invention provides a turbojet engine lubricating oil system, which is used for solving the problems that in the prior art, a small and medium-sized turbojet engine lubricating oil system has a dripping phenomenon in a static state and has air plug hidden danger. When the engine is started, air in the pipeline system enters the upper throttling joint, so that the resistance behind the pump is reduced, and the problem of air plug of the booster pump is solved; when the engine stops, air at the upper part of the lubricating oil tank enters the lower throttling joint, and an air column is formed between an oil inlet of the lubricating oil pump and lubricating oil in the lubricating oil tank, so that the phenomenon of dripping and leaking of the lubricating oil can be reduced.
The invention specifically adopts the following technical scheme for realizing the purpose:
a turbojet engine lubricating oil system comprises a lubricating oil tank, wherein a variable throttle valve is mounted on the outer wall of the lubricating oil tank, the variable throttle valve is connected with a lubricating oil pump through a pipeline system, and the lubricating oil pump is connected with an engine; the variable throttle valve comprises a valve block body, wherein an atmosphere communicating joint and an upper throttling joint which are communicated with each other are arranged on the valve block body, the atmosphere communicating joint is connected with an atmosphere communicating pipe which extends to the inner top of the lubricating oil tank, a lower throttling joint which is communicated with the upper throttling joint and has a flow resistance effect is arranged in the valve block body, and the variable throttle valve is further connected with an inner suction pipe which extends to the inner lower part of the lubricating oil tank and is communicated with the lower throttling joint.
The working principle is as follows: when the engine starts, the lubricating oil pump starts to work, air is stored in the pipeline system at the moment, the lubricating oil pump starts to suck the air in the pipeline system under the action of self-energy absorption force, the air enters the upper throttling joint through the pipeline system after being compressed and cannot enter the one-way valve, so that the resistance after the pump is reduced, and the problem of air plug of the booster pump is solved. Because the flow resistance effect of lower throttle joint, the compressed air that gets into upper throttle joint can get into lubricating oil tank upper portion air cavity through atmosphere communicating pipe, forms the jam effect to lower throttle joint simultaneously, reduces the booster pump efficiency loss that brings because lower throttle joint, and the air in the discharge piping system fast to form the negative pressure in the piping system, the lubricating oil in the lubricating oil tank gets into the lubricating oil pump oil inlet under the effect of negative pressure, and the lubricating oil pump begins the pressure boost.
When the engine stops working, the booster pump stops supplying oil, air at the upper part of the lubricating oil tank enters the lower throttling joint through the atmosphere communicating pipe and then enters the pipeline system, an air column is formed between the oil inlet of the lubricating oil pump and lubricating oil in the lubricating oil tank, a continuous circulating medium is prevented from being formed between the lubricating oil in the lubricating oil tank and the inlet of the lubricating oil pump, and the phenomenon of lubricating oil dripping can be reduced.
In conclusion, when the engine is started, air in the pipeline system enters the upper throttling joint, so that the resistance behind the pump is reduced, and the problem of air plug of the booster pump is solved; when the engine stops, air at the upper part of the lubricating oil tank enters the lower throttling joint, and an air column is formed between an oil inlet of the lubricating oil pump and lubricating oil in the lubricating oil tank, so that the phenomenon of dripping and leaking of the lubricating oil can be reduced.
As a preferable mode, the pipeline system comprises an external oil suction pipe and a high-pressure oil inlet pipe, and the upper throttling joint is connected with an oil outlet of the lubricating oil pump through the high-pressure oil inlet pipe; the variable throttle valve is connected with an oil inlet of the lubricating oil pump through an external oil suction pipe.
As a preferred mode, the variable throttle valve further comprises an oil inlet joint arranged in the valve block, one end of the oil inlet joint is connected with an oil inlet of the lubricating oil pump through an outer oil suction pipe, and the other end of the oil inlet joint is connected with an inner oil suction pipe.
As a preferred mode, the oil feed connects and is the cross, the oil feed connects including left joint, right joint, top connection and the lower clutch of shaping as an organic whole each other, oil pipe is inhaled outward to left side articulate, inhales oil pipe in the right side articulate, top connection and lower throttle articulate, install the shutoff screw on the lower clutch.
As a preferred mode, the oil inlet joint is in threaded connection with the valve block body, and a rubber ring is arranged between the oil inlet joint and the valve block body.
Preferably, an oil passage is formed in the valve block, and the atmosphere communication joint, the upper throttle joint and the lower throttle joint are communicated with each other through the oil passage.
As a preferable mode, the atmosphere communication joint includes an outer joint and an inner joint which are integrally formed with each other, the outer joint is connected to the atmosphere communication pipe, and the inner joint is installed in the valve block and is communicated with the oil passage.
As a preferable mode, the upper throttle joint comprises an external section and an internal section which are formed into a whole, the external section is connected with the high-pressure oil inlet pipe, and the internal section is installed in the valve block body and communicated with the oil way.
Preferably, the atmosphere communication joint and the upper throttling joint are connected with the valve block body through threads, and rubber gaskets are arranged among the atmosphere communication joint, the upper throttling joint and the valve block body.
The invention has the following beneficial effects:
(1) when the engine is started, air in the pipeline system enters the upper throttling joint, so that the resistance behind the pump is reduced, and the problem of air plug of the booster pump is solved; when the engine stops, air at the upper part of the lubricating oil tank enters the lower throttling joint, and an air column is formed between an oil inlet of the lubricating oil pump and lubricating oil in the lubricating oil tank, so that the phenomenon of dripping and leaking of the lubricating oil can be reduced.
(2) The upper throttling joint and the lower throttling joint have an adjustable function and are suitable for lubricating oil pumps of different models.
(3) According to the invention, the oil inlet joint, the atmosphere communicating joint and the upper throttling joint are connected with the valve block body through threads, so that the oil inlet joint, the atmosphere communicating joint and the upper throttling joint are convenient to detach and mount from the valve block body.
(4) According to the invention, the rubber ring is arranged between the oil inlet joint and the valve block body, and the rubber gaskets are arranged between the atmosphere communication joint, the upper throttling joint and the valve block body, so that the sealing performance among the oil inlet joint, the atmosphere communication joint, the upper throttling joint and the valve block body can be improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic sectional front view of the variable throttle valve of the present invention;
FIG. 3 is a schematic structural view of a lubricating oil flow path of a booster stage of the lubricating oil pump of the present invention;
FIG. 4 is a schematic diagram of the frontal configuration of an oil feed joint of the present invention;
FIG. 5 is a schematic front view of an upper choke fitting of the present invention;
FIG. 6 is a schematic front view of an atmospheric communication joint according to the present invention;
reference numerals: the lubricating oil pump comprises a lubricating oil pump 1, a lubricating oil pump oil inlet 101, a high-pressure oil inlet pipe 2, an external oil suction pipe 3, a variable throttle valve 4, an oil inlet joint 41, a left joint 411, an upper joint 412, a right joint 413, a lower joint 414, an atmospheric communicating joint 42, an external joint 421, an internal joint 422, a valve block 43, an upper throttling joint 44, an internal connecting section 441, an external connecting section 442, an oil path 45, a lower throttling joint 46, a plugging screw 47, a rubber ring 48, a rubber gasket 49, an internal oil suction pipe 5, an atmospheric communicating pipe 6, a lubricating oil tank 7 and an engine 8.
Detailed Description
For a better understanding of the present invention by those skilled in the art, the present invention will be described in further detail below with reference to the accompanying drawings and the following examples.
Example 1:
as shown in fig. 1-3, a turbojet engine lubricating oil system comprises a lubricating oil tank 7, wherein a variable throttle valve 4 is mounted on the outer wall of the lubricating oil tank 7, the variable throttle valve 4 is connected with a lubricating oil pump 1 through a pipeline system, and the lubricating oil pump 1 is connected with an engine 8; the variable throttle valve 4 comprises a valve block body 43, an atmosphere communication joint 42 and an upper throttle joint 44 which are mutually communicated are installed on the valve block body 43, the atmosphere communication joint 42 is connected with an atmosphere communication pipe 6 which extends to the inner top of the lubricating oil tank 7, a lower throttle joint 46 which is communicated with the upper throttle joint 44 and has a flow resistance effect is installed in the valve block body 43, and an inner oil suction pipe 5 which extends to the inner lower part of the lubricating oil tank 7 and is communicated with the lower throttle joint 46 is also connected with the variable throttle valve 4.
The working principle is as follows: when the engine 8 starts, the lubricating oil pump 1 starts to work, air is stored in the pipeline system at the moment, the air in the pipeline system starts to be sucked under the action of the self-absorption force of the lubricating oil pump 1, and the air enters the upper throttle joint 44 through the pipeline system and cannot enter the one-way valve after being compressed, so that the resistance after the pump is reduced, and the problem of air plug of the booster pump is solved. Due to the flow resistance of the lower throttle joint 46, compressed air entering the upper throttle joint 44 can enter an upper air cavity of the lubricating oil tank 7 through the atmosphere communicating pipe 6, a blocking effect is formed on the lower throttle joint 46, the efficiency loss of the booster pump caused by the lower throttle joint 46 is reduced, air in a pipeline system is rapidly discharged, negative pressure is formed in the pipeline system, lubricating oil in the lubricating oil tank 7 enters the oil inlet 101 of the lubricating oil pump under the action of the negative pressure, and the lubricating oil pump 1 starts to boost pressure.
When the engine 8 stops working, the booster pump stops supplying oil, air at the upper part of the lubricating oil tank 7 enters the lower throttling joint 46 through the atmosphere communicating pipe 6 and then enters the pipeline system, an air column is formed between the oil inlet 101 of the lubricating oil pump and lubricating oil in the lubricating oil tank 7, a continuous circulating medium is prevented from being formed between the lubricating oil in the lubricating oil tank 7 and the inlet of the lubricating oil pump 1, and the phenomenon of lubricating oil dripping can be reduced.
In conclusion, when the engine 8 is started, air in the pipeline system enters the upper throttle joint 44, so that the resistance after the pump is reduced, and the problem of air plug of the booster pump is solved; when the engine 8 stops, air on the upper part of the lubricating oil tank 7 enters the lower throttling joint 46, and an air column is formed between the oil inlet 101 of the lubricating oil pump and lubricating oil in the lubricating oil tank 7, so that the phenomenon of dripping and leaking of the lubricating oil can be reduced.
Example 2:
as shown in fig. 1-6, the present embodiment provides a preferred mechanism for piping, variable restriction and related connections based on the embodiments described above. Namely, the pipeline system comprises an external oil suction pipe 3 and a high-pressure oil inlet pipe 2, and the upper throttle joint 44 is connected with an oil outlet of the lubricating oil pump 1 through the high-pressure oil inlet pipe 2; the variable throttle valve 4 is connected with the oil inlet 101 of the lubricating oil pump through the outer oil suction pipe 3.
Preferably, the variable throttle 4 further comprises an oil inlet joint 41 installed in the valve block 43, one end of the oil inlet joint 41 is connected with the oil inlet 101 of the lubricating oil pump through the outer oil suction pipe 3, and the other end is connected with the inner oil suction pipe 5.
Preferably, the oil inlet joint 41 is cross-shaped, the oil inlet joint 41 comprises a left joint 411, a right joint 413, an upper joint 412 and a lower joint 414 which are formed into a whole, the left joint 411 is connected with the outer oil suction pipe 3, the right joint 413 is connected with the inner oil suction pipe 5, the upper joint 412 is connected with the lower throttling joint 46, and the lower joint 414 is provided with a plugging screw 47.
Preferably, the oil inlet joint 41 is connected with the valve block body 43 through a thread, and a rubber ring 48 is installed between the oil inlet joint 41 and the valve block body 43. The oil inlet joint 41 can be conveniently detached from and installed on the valve block body 43, and the rubber ring 48 can play a good sealing role between the oil inlet joint 41 and the valve body.
The specific pipe connections in this embodiment are: a left joint 411 of the variable throttle valve 4 is connected with an oil inlet 101 of the lubricating oil pump through an outer oil suction pipe 3, and a right joint 413 of the variable throttle valve 4 is connected with an inner oil suction pipe 5 immersed at the bottom of the lubricating oil tank 7; the upper throttling joint 44 is connected with an oil outlet of the lubricating oil pump 1 through a high-pressure oil inlet pipe 2; the atmosphere connection joint 42 is connected to an atmosphere connection pipe 6 extending to the top of the lubricant tank 7 and connected to the atmosphere.
The specific working principle in this embodiment is as follows: when the engine 8 normally works, a small strand of high-pressure lubricating oil at the oil outlet of the booster pump enters the upper throttling joint 44 through the high-pressure oil inlet pipe 2, and due to the flow resistance effect of the lower throttling joint 46, the strand of high-pressure lubricating oil is sprayed into an air cavity on the upper part of the lubricating oil tank 7 through the atmosphere communicating pipe 6, so that the lower throttling joint 46 can be blocked, air is prevented from entering the outer oil suction pipe 3, and the air plug problem of the booster pump is reduced.
When the engine 8 stops working, the booster pump stops supplying oil, air on the upper part of the lubricating oil tank 7 enters the upper throttling joint 44 through the atmosphere communicating pipe 6 and then enters the outer oil suction pipe 3 and the inner oil suction pipe 5, an air column is formed between the lubricating oil in the lubricating oil pump oil inlet 101 and the lubricating oil in the lubricating oil tank 7, a continuous circulating medium is prevented from being formed between the lubricating oil in the lubricating oil tank 7 and the lubricating oil pump oil inlet 101, and therefore the lubricating oil can be prevented from dripping and leaking.
The rest is the same as example 1, and therefore, will not be described herein.
Example 3:
as shown in fig. 1 to 6, on the basis of embodiment 1, this embodiment provides a further preferable structure of the upper throttle joint, the atmosphere connection joint and the valve block body. That is, an oil passage 45 is formed in the valve block 43, the atmosphere communication joint 42, the upper throttle joint 44 and the lower throttle joint 46 are communicated with each other through the oil passage 45, and the lubricating oil can flow into the upper throttle joint 44, the atmosphere connection joint and the oil inlet joint 41 through the oil passage 45.
Preferably, the atmosphere communication joint 42 includes an outer joint 421 and an inner joint 422 which are integrally formed with each other, the outer joint 421 is connected to the atmosphere communication pipe 6, and the inner joint 422 is installed in the valve block body 43 and communicates with the oil passage 45.
Preferably, the upper throttle 44 includes an outer connecting section 442 and an inner connecting section 441 integrally formed with each other, the outer connecting section 442 is connected to the high pressure fuel inlet pipe 2, and the inner connecting section 441 is installed in the valve block 43 and communicates with the oil passage 45.
Preferably, the atmosphere communication joint 42 and the upper throttle joint 44 are both connected to the valve block 43 by a screw, and rubber gaskets 49 are mounted between the atmosphere communication joint 42, the upper throttle joint 44 and the valve block 43. The air communicating joint 42 and the upper throttling joint 44 can be conveniently detached from and installed on the valve block body 43, and the rubber gasket 49 can play a good sealing role among the air communicating joint 42, the upper throttling joint 44 and the valve body.
The rest is the same as example 1, and therefore, will not be described herein.
The above is an embodiment of the present invention. The embodiments and specific parameters in the embodiments are only for the purpose of clearly illustrating the verification process of the invention and are not intended to limit the scope of the invention, which is defined by the claims, and all equivalent structural changes made by using the contents of the specification and the drawings of the present invention should be covered by the scope of the present invention.
Claims (9)
1. A turbojet engine lubricating oil system, includes lubricating oil tank (7), its characterized in that: the variable throttling valve (4) is mounted on the outer wall of the lubricating oil tank (7), the variable throttling valve (4) is connected with a lubricating oil pump (1) through a pipeline system, and the lubricating oil pump (1) is connected with an engine (8); variable choke valve (4) are including valve block body (43), install the inside atmosphere intercommunication that communicates each other on valve block body (43) and connect (42) and last throttle joint (44), atmosphere intercommunication connects (42) to be connected with and extends to atmosphere communicating pipe (6) at top in lubricating oil tank (7), install in valve block body (43) and connect (44) intercommunication and have the lower throttle joint (46) of flow resistance with last throttle, variable choke valve (4) still are connected with extend to in lubricating oil tank (7) lower part and connect (46) communicating interior suction line (5) with lower throttle.
2. The turbojet engine oil system of claim 1, wherein: the pipeline system comprises an external oil suction pipe (3) and a high-pressure oil inlet pipe (2), and the upper throttling joint (44) is connected with an oil outlet of the lubricating oil pump (1) through the high-pressure oil inlet pipe (2); the variable throttle valve (4) is connected with an oil inlet (101) of the lubricating oil pump through an outer oil suction pipe (3).
3. The turbojet engine oil system of claim 2, wherein: the variable throttle valve (4) further comprises an oil inlet joint (41) installed in the valve block body (43), one end of the oil inlet joint (41) is connected with an oil inlet (101) of the lubricating oil pump through the outer oil suction pipe (3), and the other end of the oil inlet joint is connected with the inner oil suction pipe (5).
4. The turbojet engine oil system of claim 3, wherein: oil feed connects (41) and is the cross, oil feed connects (41) including left side joint (411), right side joint (413), top connection (412) and lower clutch (414) that the shaping is as an organic whole each other, outer oil pipe (3) of inhaling is connected in left side joint (411), and interior oil pipe (5) are connected in right side joint (413), and top connection (412) are connected with lower throttle joint (46), install shutoff screw (47) on lower clutch (414).
5. The turbojet engine oil system of claim 3 or claim 4, wherein: the oil inlet connector (41) is connected with the valve block body (43) through threads, and a rubber ring (48) is arranged between the oil inlet connector (41) and the valve block body (43).
6. The turbojet engine oil system of claim 2, wherein: an oil path (45) is formed in the valve block body (43), and the atmosphere communication joint (42), the upper throttling joint (44) and the lower throttling joint (46) are communicated with each other through the oil path (45).
7. The turbojet engine oil system of claim 6, wherein: the atmosphere communication joint (42) comprises an outer joint (421) and an inner joint (422) which are integrally formed, the outer joint (421) is connected with the atmosphere communication pipe (6), and the inner joint (422) is installed in the valve block body (43) and communicated with the oil way (45).
8. The turbojet engine oil system of claim 6, wherein: the upper throttling joint (44) comprises an external connection section (442) and an internal connection section (441) which are formed into a whole, the external connection section (442) is connected with the high-pressure oil inlet pipe (2), and the internal connection section (441) is installed in the valve block body (43) and is communicated with the oil way (45).
9. The turbojet engine oil system of any one of claims 6 to 8, wherein: the atmosphere communication joint (42) and the upper throttling joint (44) are connected with the valve block body (43) through threads, and rubber gaskets (49) are mounted among the atmosphere communication joint (42), the upper throttling joint (44) and the valve block body (43).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911080367.8A CN110714837B (en) | 2019-11-06 | 2019-11-06 | Turbojet engine lubricating oil system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911080367.8A CN110714837B (en) | 2019-11-06 | 2019-11-06 | Turbojet engine lubricating oil system |
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| CN110714837A true CN110714837A (en) | 2020-01-21 |
| CN110714837B CN110714837B (en) | 2020-07-07 |
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Cited By (1)
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| CN114352415A (en) * | 2021-12-23 | 2022-04-15 | 中国航发哈尔滨东安发动机有限公司 | Structure suitable for air plug of preapring-proof aircraft engine lubricating oil system |
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| CN110714837B (en) | 2020-07-07 |
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