阅读说明：本技术 一种涡喷发动机滑油系统 (Turbojet engine lubricating oil system ) 是由 肖志强 李子华 丁红华 刘瓒 张艺粮 于 2019-11-06 设计创作，主要内容包括：本发明涉及小型涡喷发动机技术领域,具体是一种涡喷发动机滑油系统,用于解决现有技术中小型涡喷发动机滑油系统在静态时具有滴漏现象,且存在气塞隐患的问题。本发明包括滑油箱、可变节流阀、滑油泵和发动机,所述可变节流阀包括阀块体,所述阀块体上安装有内部相互连通的大气连通接头和上节流接头,所述大气连通接头连接有延伸至滑油箱内顶部的大气连通管,所述阀块体内安装有与上节流接头连通且具有流阻作用的下节流接头,所述可变节流阀还连接有延伸至滑油箱内下部且与下节流接头相通的内吸油管。通过上述技术方案可以降低了泵后阻力,减少了增压泵的气塞问题,以及可以减少滑油的滴漏现象。(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.)

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).

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.