CN109611247B - Fuel oil collecting device for preventing fuel oil leakage of engine - Google Patents
Fuel oil collecting device for preventing fuel oil leakage of engine Download PDFInfo
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- CN109611247B CN109611247B CN201811392602.0A CN201811392602A CN109611247B CN 109611247 B CN109611247 B CN 109611247B CN 201811392602 A CN201811392602 A CN 201811392602A CN 109611247 B CN109611247 B CN 109611247B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0047—Layout or arrangement of systems for feeding fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
- F02M37/0023—Valves in the fuel supply and return system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0047—Layout or arrangement of systems for feeding fuel
- F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
Abstract
The invention relates to a fuel oil collecting device for preventing fuel oil leakage of an engine, which comprises a pipeline, a collecting cavity and a servo control valve, wherein the pipeline is connected with the collecting cavity; a valve sleeve of the servo control valve is provided with a low-pressure oil return port, a fuel main pipe oil inlet, a servo control oil port, a second cavity oil port and an oil storage cavity port; a piston is arranged in the collection cavity, the piston divides the collection cavity into a left cavity and a right cavity, the left cavity is a piston control cavity, and the right cavity is an oil storage cavity; one side of the piston extends to form a sealing partition plate, the sealing partition plate is positioned in the piston control cavity and divides the piston control cavity into a first cavity and a second cavity, the first cavity is communicated with the atmospheric environment, the second cavity is communicated with an oil port of the second cavity through a pipeline, and the oil storage cavity is communicated with an oil storage cavity port through a pipeline; the problem of after the engine stops, the fuel inflation that influences the fuel main pipe of thermal reflux effect etc. causes the nozzle oil drip, influences combustion chamber nozzle life-span and combustion efficiency is solved, collect the unnecessary fuel simultaneously and also contribute to environmental protection.
Description
Technical Field
The invention belongs to the field of design of fuel oil collecting devices, and relates to a fuel oil collecting device for preventing fuel oil leakage of an engine.
Background
At present, the direct emptying of fuel oil of a fuel oil main pipe after parking is adopted in the domestic and military field, refilling of the fuel oil main pipe is not facilitated, meanwhile, oil discharge risks the environmental protection, and the domestic and civil aircraft engine field does not have a mature main pipe fuel oil collecting device temporarily.
Disclosure of Invention
The purpose of the invention is as follows: a fuel oil collecting device is arranged in a fuel oil main pipe of an engine, and is mainly used for collecting expanded fuel oil when the fuel oil of the fuel oil main pipe expands due to different reasons such as a thermal reflux effect and the like after the fuel oil main pipe is closed after the fuel oil main pipe is stopped, so that the pressure of the fuel oil main pipe is ensured not to exceed a nozzle opening pressure set value, and the expanded fuel oil is prevented from entering a combustion chamber.
The technical scheme of the invention is as follows: a fuel oil collecting device for preventing fuel oil leakage of an engine comprises a pipeline, a collecting cavity and a servo control valve;
a valve sleeve of the servo control valve is provided with a low-pressure oil return port A, a fuel main pipe oil inlet B, a servo control oil port C, a second cavity oil port D and an oil storage cavity port E;
a piston is arranged in the collection cavity, the piston divides the collection cavity into a left cavity and a right cavity, the left cavity is a piston control cavity, and the right cavity is an oil storage cavity; one side of the piston extends to form a sealing partition plate, the sealing partition plate is positioned in the piston control cavity and divides the piston control cavity into a first cavity and a second cavity, the first cavity is communicated with the atmospheric environment, the second cavity is communicated with an oil port of the second cavity through a pipeline, and the oil storage cavity is communicated with an oil storage cavity port through a pipeline;
the oil inlet of the fuel main pipe is communicated with the fuel main pipe, the low-pressure oil return port is communicated with an oil return pipeline, and the servo control oil is communicated with the servo control oil port;
the valve core of the servo control valve is switched between a first position and a second position, when the engine is stopped, the servo control oil enables the valve core to be located at the second position, at the moment, the oil inlet of the fuel oil main pipe is simultaneously communicated with the oil outlet D of the second cavity and the oil storage cavity, and the low-pressure oil return port and the servo control oil outlet are sealed by the valve core;
when the engine works, the servo control oil pushes the valve core to reach the first position, so that the oil inlet of the fuel oil main pipe is closed, the servo control oil port is communicated with the second cavity oil port, and the low-pressure oil return port is communicated with the oil storage cavity port;
wherein: pServo system*SSmall>PGo back to*SBig (a)；PServo systemFor servo-controlling the oil pressure, SSmallFor the piston to be in the secondArea of force in the cavity, PGo back toFor pressure intensity of oil return line, SBig (a)The force bearing area of the piston in the oil storage cavity.
The working principle is as follows:
when the engine works normally, the pressure of servo control oil is far higher than the return pressure of the system, and at the moment, the valve core of the servo control valve is controlled by the servo control oil to be located at the first position. The port E is communicated with the low-pressure oil way of the port A, the port E is cut off from the port B, so that the oil storage cavity is disconnected with the fuel oil main pipe, the port D is opened, the servo control oil enters the second cavity through the port D, and the port P is used for controlling the oil to flow into the second cavityServo system*SSmall>PGo back to*SBig (a)And the piston moves rightwards to the limit position, the oil storage cavity is communicated with the port E, the port E is communicated with the port A, residual oil collected by the oil storage cavity can be discharged into an oil return pipeline, and the oil storage cavity is emptied, and the schematic diagram of the oil storage cavity is shown in figure 1.
When the engine stops, the temperature in the fuel oil main pipe is higher, the fuel oil pressure rises, the servo control valve controls the pressure to be reduced to be close to or the same as the return pressure of the system, the valve core is reset to be switched to the second position, the low-pressure oil way of the port E and the port A is cut off, the port E is communicated with the port B, the oil storage cavity of the collection cavity is communicated with the port E, the oil storage cavity is communicated with the fuel oil main pipe, and the oil storage cavity enters a collection state; meanwhile, the port D is also communicated with the port B, namely the second cavity is communicated with the fuel oil main pipe and the oil storage cavity, the fuel oil main pipe can release pressure and discharge fuel oil into the oil storage cavity due to the fact that the first cavity is communicated with the atmosphere, and meanwhile, the piston moves to the left, and the principle is shown in the figure 2.
Preferably, a return spring is mounted on the valve core.
The invention has the beneficial effects that: the problem of after the engine stops, the fuel inflation that influences the fuel main pipe of thermal reflux effect etc. causes the nozzle oil drip, influences combustion chamber nozzle life-span and combustion efficiency is solved, collect the unnecessary fuel simultaneously and also contribute to environmental protection.
Drawings
FIG. 1 is a first position diagram of the present invention;
FIG. 2 is a second position diagram of the present invention;
wherein, the device comprises 1-atmosphere cavity, 2-second cavity, 3-oil storage cavity, 4-piston, 5-collection cavity, 6-pipeline, 7-servo control valve sleeve, 8-servo control valve core, 9-spring, 10-system low-pressure oil return pipeline, 11-fuel oil main pipe and 12-sealing ring.
Detailed Description
Referring to fig. 1 and 2, a fuel collecting apparatus for preventing fuel leakage of an engine includes a pipe, a collecting chamber, and a servo control valve;
a valve sleeve of the servo control valve is provided with a low-pressure oil return port A, a fuel main pipe oil inlet B, a servo control oil port C, a second cavity oil port D and an oil storage cavity port E;
a piston is arranged in the collection cavity, the piston divides the collection cavity into a left cavity and a right cavity, the left cavity is a piston control cavity, and the right cavity is an oil storage cavity; one side of the piston extends to form a sealing partition plate, the sealing partition plate is positioned in the piston control cavity and divides the piston control cavity into a first cavity and a second cavity, the first cavity is communicated with the atmospheric environment, the second cavity is communicated with an oil port of the second cavity through a pipeline, and the oil storage cavity is communicated with an oil storage cavity port through a pipeline;
the oil inlet of the fuel main pipe is communicated with the fuel main pipe, the low-pressure oil return port is communicated with an oil return pipeline, and the servo control oil is communicated with the servo control oil port;
the valve core of the servo control valve is switched between a first position and a second position, when the engine is stopped, the servo control oil enables the valve core to be located at the second position, at the moment, the oil inlet of the fuel oil main pipe is simultaneously communicated with the oil outlet D of the second cavity and the oil storage cavity, and the low-pressure oil return port and the servo control oil outlet are sealed by the valve core;
when the engine works, the servo control oil pushes the valve core to reach the first position, so that the oil inlet of the fuel oil main pipe is closed, the servo control oil port is communicated with the second cavity oil port, and the low-pressure oil return port is communicated with the oil storage cavity port;
wherein: pServo system*SSmall>PGo back to*SBig (a)；PServo systemFor servo-controlling the oil pressure, SSmallIs the force area of the piston in the second chamber, PGo back toFor pressure intensity of oil return line, SBig (a)The force bearing area of the piston in the oil storage cavity.
The working principle is as follows:
when the engine works normally, the pressure of servo control oil is far higher than the return pressure of the system, and at the moment, the valve core of the servo control valve is controlled by the servo control oil to be located at the first position. The port E is communicated with the low-pressure oil way of the port A, the port E is cut off from the port B, so that the oil storage cavity is disconnected with the fuel oil main pipe, the port D is opened, the servo control oil enters the second cavity through the port D, and the port P is used for controlling the oil to flow into the second cavityServo system*SSmall>PGo back to*SBig (a)And the piston moves rightwards to the limit position, the oil storage cavity is communicated with the port E, the port E is communicated with the port A, residual oil collected by the oil storage cavity can be discharged into an oil return pipeline, and the oil storage cavity is emptied, and the schematic diagram of the oil storage cavity is shown in figure 1.
When the engine stops, the temperature in the fuel oil main pipe is higher, the fuel oil pressure rises, the servo control valve controls the pressure to be reduced to be close to or the same as the return pressure of the system, the valve core is reset to be switched to the second position, the low-pressure oil way of the port E and the port A is cut off, the port E is communicated with the port B, the oil storage cavity of the collection cavity is communicated with the port E, the oil storage cavity is communicated with the fuel oil main pipe, and the oil storage cavity enters a collection state; meanwhile, the port D is also communicated with the port B, namely the second cavity is communicated with the fuel oil main pipe and the oil storage cavity, the fuel oil main pipe can release pressure and discharge fuel oil into the oil storage cavity due to the fact that the first cavity is communicated with the atmosphere, and meanwhile, the piston moves to the left, and the principle is shown in the figure 2.
Claims (2)
1. A fuel oil collecting device for preventing fuel oil leakage of an engine comprises a pipeline, a collecting cavity and a servo control valve;
a valve sleeve of the servo control valve is provided with a low-pressure oil return port (A), a fuel main pipe oil inlet (B), a servo control oil port (C), a second cavity oil port (D) and an oil storage cavity port (E);
a piston is arranged in the collection cavity, the piston divides the collection cavity into a left cavity and a right cavity, the left cavity is a piston control cavity, and the right cavity is an oil storage cavity; one side of the piston extends to form a sealing partition plate, the sealing partition plate is positioned in the piston control cavity and divides the piston control cavity into a first cavity and a second cavity, the first cavity is communicated with the atmospheric environment, the second cavity is communicated with an oil port of the second cavity through a pipeline, and the oil storage cavity is communicated with an oil storage cavity port through a pipeline;
the oil inlet of the fuel main pipe is communicated with the fuel main pipe, the low-pressure oil return port is communicated with an oil return pipeline, and the servo control oil is communicated with the servo control oil port;
the valve core of the servo control valve is switched between a first position and a second position, when the engine is stopped, the servo control oil enables the valve core to be located at the second position, at the moment, the oil inlet of the fuel oil main pipe is simultaneously communicated with the oil inlet (D) of the second cavity and the oil storage cavity, and the low-pressure oil return port and the servo control oil inlet are sealed by the valve core;
when the engine works, the servo control oil pushes the valve core to reach the first position, so that the oil inlet of the fuel oil main pipe is closed, the servo control oil port is communicated with the second cavity oil port, and the low-pressure oil return port is communicated with the oil storage cavity port;
wherein: p is from S small to P back S large; p servo is the servo control oil pressure, S is the stress area of the piston in the second cavity, P return is the oil return pipeline pressure, and S is the stress area of the piston in the oil storage cavity.
2. A fuel collecting apparatus for preventing fuel leakage from an engine as set forth in claim 1, wherein: and the valve core is provided with a return spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811392602.0A CN109611247B (en) | 2018-11-21 | 2018-11-21 | Fuel oil collecting device for preventing fuel oil leakage of engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811392602.0A CN109611247B (en) | 2018-11-21 | 2018-11-21 | Fuel oil collecting device for preventing fuel oil leakage of engine |
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| Publication Number | Publication Date |
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| CN109611247A CN109611247A (en) | 2019-04-12 |
| CN109611247B true CN109611247B (en) | 2020-12-29 |
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| CN201811392602.0A Active CN109611247B (en) | 2018-11-21 | 2018-11-21 | Fuel oil collecting device for preventing fuel oil leakage of engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112096865A (en) * | 2020-09-08 | 2020-12-18 | 中国航发沈阳黎明航空发动机有限责任公司 | Double-linkage back-to-back assembled elastic sealing structure for aero-engine |
| CN114000957B (en) * | 2021-01-25 | 2023-02-03 | 辉腾交通器材(安徽)有限公司 | Adjustable piston for motorcycle |
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