CN115446055A - High-pressure flushing system and method for auxiliary fuel tank of airplane - Google Patents
High-pressure flushing system and method for auxiliary fuel tank of airplane Download PDFInfo
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- CN115446055A CN115446055A CN202211015894.2A CN202211015894A CN115446055A CN 115446055 A CN115446055 A CN 115446055A CN 202211015894 A CN202211015894 A CN 202211015894A CN 115446055 A CN115446055 A CN 115446055A
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- 238000011010 flushing procedure Methods 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 45
- 239000002828 fuel tank Substances 0.000 title claims abstract description 25
- 238000004140 cleaning Methods 0.000 claims abstract description 88
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 239000003921 oil Substances 0.000 claims description 494
- 238000012544 monitoring process Methods 0.000 claims description 9
- 238000011084 recovery Methods 0.000 claims description 9
- 238000011065 in-situ storage Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 7
- 239000010729 system oil Substances 0.000 claims description 7
- 230000002159 abnormal effect Effects 0.000 claims description 6
- 239000003350 kerosene Substances 0.000 claims description 6
- 238000000746 purification Methods 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 239000000284 extract Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000000346 nonvolatile oil Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims 1
- 239000003344 environmental pollutant Substances 0.000 abstract description 4
- 231100000719 pollutant Toxicity 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/087—Cleaning containers, e.g. tanks by methods involving the use of tools, e.g. brushes, scrapers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
Abstract
The invention provides a high-pressure flushing system and method for an auxiliary oil tank of an airplane, which comprises an oil tank for containing cleaning liquid, wherein an oil suction filter is arranged inside the oil tank and is connected with an oil supply motor pump unit, an outlet of the oil supply motor pump unit is connected with an oil filter unit, a pipeline behind the oil filter unit is connected with a flowmeter, an electric three-way ball valve is connected behind the flowmeter, one branch of the electric three-way ball valve is connected with an oil return pipe through a communicating pipe, and the oil return pipe is connected with the oil tank through an oil return filter; and the other branch of the electric three-way ball valve is connected with an auxiliary oil tank to be cleaned, and an outlet of the auxiliary oil tank is connected with a flowmeter and an oil return motor pump set. The system can be used for providing high-pressure cleaning liquid in the cleaning process of the aircraft auxiliary fuel tank, and further thoroughly cleaning oil stains and potential pollutants deposited on the inner wall of the auxiliary fuel tank.
Description
Technical Field
The invention relates to the technical field of aircraft fuel tank cleaning, in particular to a high-pressure flushing system and method for an aircraft auxiliary fuel tank.
Background
In the maintenance process of the auxiliary fuel tank of the airplane, the inner cavity of the auxiliary fuel tank of the airplane needs to be cleaned, aviation kerosene needs to be adopted for cleaning in the cleaning process, in order to guarantee the cleaning effect, the high-pressure flushing mode needs to be adopted for flushing, and at the moment, a corresponding flushing system needs to be designed to provide high-pressure flushing media.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a high-pressure flushing system for an auxiliary fuel tank of an airplane, which can be used for providing high-pressure cleaning liquid in the cleaning process of the auxiliary fuel tank of the airplane so as to thoroughly flush oil stains and potential pollutants deposited on the inner wall of the auxiliary fuel tank.
In order to achieve the technical characteristics, the invention aims to realize that: the high-pressure flushing system of the airplane auxiliary oil tank comprises an oil tank for containing cleaning liquid, wherein an oil suction filter is arranged in the oil tank and is connected with an oil supply motor pump unit, an outlet of the oil supply motor pump unit is connected with an oil filter unit, a pipeline behind the oil filter unit is connected with a flowmeter, an electric three-way ball valve is connected behind the flowmeter, one branch of the electric three-way ball valve is connected with an oil return pipe through a communicating pipe, and the oil return pipe is connected with the oil tank through an oil return filter; and the other branch of the electric three-way ball valve is connected with an auxiliary oil tank to be cleaned, and an outlet of the auxiliary oil tank is connected with a flowmeter and an oil return motor pump set.
And a temperature sensor, a pressure sensor and an in-situ metering port are sequentially arranged on a pipeline between the oil filter group and the flowmeter.
The oil supply motor pump set adopts a gear pump as a cleaning power source, is used for filling kerosene into the auxiliary oil tank before rotary cleaning, and is used for providing a certain pressure flushing source for the auxiliary oil tank during pressure cleaning.
And an oil online detector is arranged on the oil return pipe and on a pipeline before the oil return filter.
And a temperature sensor and a sampling valve are arranged on the oil return pipe and are positioned between the oil return motor pump set and the oil online detector.
And an electric proportional overflow valve is arranged on a pipeline between the outlet of the oil supply motor pump set and the oil filter set.
The oil suction filter, the oil filter group and the oil return filter all adopt a pressure difference alarm oil filter with a large flow specification.
The oil online detector is used for detecting the quality grade of oil recovered by a system self-circulation and an auxiliary oil tank, is provided with a printer and can print a detection report in real time.
The method for flushing the auxiliary oil tank of the airplane by adopting the high-pressure flushing system of the auxiliary oil tank of the airplane adopts a fixed oil tank as a cleaning oil source and is provided with an oil supply motor pump set and an oil return motor pump set, so that the filling, pressure flushing, oil recovery and oil self-cleaning of cleaning oil in the cleaning process of the auxiliary oil tank are realized.
The specific method for filling the cleaning oil liquid before the auxiliary oil tank is rotationally cleaned comprises the following steps:
an electric three-way ball valve switches a system oil way to an oil supply branch, an oil supply motor pump set pumps cleaning oil in an oil tank, the cleaning oil is filtered by an oil filter set and then is added into a secondary oil tank through a gravity oil filling port of the secondary oil tank, a boosting port of the secondary oil tank is firstly opened before filling, a sensor port and an oil pipeline port on the secondary oil tank are reliably plugged by using a special plug, and the boosting port is plugged by using the special plug after the oil filling is finished, so that the situation that gas in the secondary oil tank cannot be timely discharged to damage the secondary oil tank when the oil is filled is prevented, and a flowmeter is used for monitoring instantaneous flow and total flow of filling when the cleaning oil is filled;
the specific method for recovering the cleaning oil liquid after the auxiliary oil tank is rotationally cleaned comprises the following steps:
after the auxiliary oil tank is cleaned in a rotating mode, cleaned oil is pumped back to the equipment oil tank from a sensor interface of the auxiliary oil tank through an oil return motor pump set, an oil return filter and an oil online detector are arranged on an oil return branch, and the cleaned oil is stored in the oil tank for standby after being detected, filtered and purified online; before oil is pumped back into the oil tank, the pressurizing port plug is opened to ensure that the air pressure in the oil tank keeps smooth with the atmosphere, so that the oil tank is prevented from being damaged by vacuum formed in the oil tank during oil pumping; the flowmeter is used for monitoring the instantaneous flow and the total flow of the extracted oil liquid during extraction;
the specific method of pressure flushing is as follows:
the pressure flushing of the auxiliary oil tank uniformly adopts the way that cleaning oil is filled from a sensor interface, and a flushing joint adopts a graded flushing joint, so that the flushing oil is fully diffused in the oil tank to achieve the sectional type pressure flushing of the auxiliary oil tank;
the oil hydraulic pressure flushing method of the K/UZC 1700 type auxiliary oil tank comprises the following steps:
the pressure flushing of the auxiliary oil tank adopts a pressure supply circulation mode, an electric three-way ball valve switches a system oil way to an oil supply branch, an oil supply motor pump set extracts oil in the oil tank and pressurizes the oil, the oil is injected into the oil tank from a sensor connector of the auxiliary oil tank through a customized oil injection connector, three sensor connectors are arranged on the auxiliary oil tank and are respectively positioned at the front section, the middle section and the rear section, equipment is injected with oil from the sensor connectors of 1, 2 and 3 branches respectively and independently and sequentially during pressure cleaning, and the different positions of the inner wall of the oil tank are flushed step by step;
when flushing, the oil return motor pump set pumps cleaning oil to the oil tank through an oil return branch from the interfaces of other sensors of the auxiliary oil tank, namely when oil is injected from the interfaces No. 1 and No. 3 respectively, oil is pumped from the oil suction path of the interface No. 2; when oil is injected from the No. 2 interface, oil is pumped from the oil suction path of the No. 3 interface;
an oil on-line detector is arranged on the oil return branch path, the quality grade of the flushing oil is detected in real time, the flushing effect is further detected indirectly, in addition, the flushing oil is purified by an oil return filter on the oil return path, and the oil reuse rate is improved;
in order to control the oil mass balance in the oil tank when the auxiliary oil tank is subjected to pressure supply circulating flushing, the flowmeter monitors the filling instantaneous flow, the filling total flow and the instantaneous flow and the pumping total flow when the oil tank is pumped out of the system in real time, the control system carries out accounting by collecting all flow values and controls the output of a pump group periodically so as to achieve the stable circulation of the system; under the high-pressure flushing working condition, a pressurizing interface of the auxiliary oil tank is opened, the inside of the auxiliary oil tank is communicated with the atmosphere, and the oil tank is prevented from being damaged due to abnormal air pressure inside the auxiliary oil tank;
the FYX-800B type auxiliary oil tank oil hydraulic pressure flushing method comprises the following steps:
the flushing principle is consistent with the flushing method of the K/UZC 1700 type auxiliary oil tank, oil is respectively and independently injected from the sensor joints at the two ends of the oil tank in sequence to flush different positions of the inner wall of the oil tank, the recovery of the oil after cleaning is consistent with the scheme of the K/UZC 1700 type auxiliary oil tank, and the oil is extracted from the sensor joint which is not injected with the oil;
during flushing, a pressurizing interface of the auxiliary oil tank is opened, the inside of the auxiliary oil tank is kept communicated with the atmosphere, damage to the oil tank due to abnormal air pressure in the auxiliary oil tank is prevented, a flow meter monitors the flow of the system in real time, and the output of a pump set is periodically controlled, so that the system is stably circulated;
the specific method for self-cleaning the oil liquid comprises the following steps:
the equipment switches the oil circuit of the system to the self-circulation branch through the electric three-way ball valve, the oil supply motor pump set is used for driving oil tank oil to circulate, and the oil filter in the oil tank filters cleaning oil in the circulation process through oil in the pipeline so as to achieve the purpose of oil purification and self-cleaning.
The invention has the following beneficial effects:
1. because the auxiliary fuel tank is of a closed structure, in order to achieve the purpose of completely cleaning the interior of the fuel tank during rotation, the fuel tank is cleaned in a kerosene filling flushing mode, oil stains and potential pollutants deposited on the inner wall of the fuel tank are thoroughly flushed, and the auxiliary fuel tank can be rotated in the cleaning process of the aircraft auxiliary fuel tank by matching with the high-field cleaning of the invention, so that the cleaning quality and effect of the auxiliary fuel tank are improved.
2. The pressure flushing of the inner cavity adopts a gear pump as a flushing power source, so that the oil absorption capacity is improved, and the pressure supply is stable.
3. The pressure flushing system adopts an electric proportional overflow valve for pressure regulation, is matched with a pressure sensor and a flowmeter, and has the functions of software and hardware overpressure automatic protection and oil tank oil mass automatic control.
4. An embedded online oil pollution degree detector is configured, a printer is arranged, the quality of cleaning oil is detected in real time, and a detection report is printed.
5. The oil supply motor pump set is designed to select a gear pump as a cleaning power source, can be used for filling kerosene into the auxiliary oil tank before rotary cleaning, can also be used for providing a certain pressure flushing source for the auxiliary oil tank during pressure cleaning, and can also be used for self circulation of oil liquid, and the matched variable frequency motor can realize the adjustment of output flow.
6. And the oil return motor pump set is used for pumping cleaning oil deposited in the auxiliary oil tank back to the oil tank when the auxiliary oil tank finishes rotary cleaning or pressure cleaning so as to finish oil recovery.
7. The pressure regulation of the system is limited and regulated by an electric proportional overflow valve.
8. The temperature sensor is used for monitoring the temperature of cleaning oil of the system, and the system is immediately stopped to alarm when the temperature of the oil exceeds a set value, so that fire hazard caused by temperature rise of the oil in the cleaning process is prevented.
9. And a pressure sensor arranged in the system is used for monitoring the operating pressure of the system, and the system is stopped immediately to alarm when the maximum value is exceeded.
10. The in-situ metering port is used for in-situ metering the pressure sensor.
11. The flowmeter is used for monitoring the instantaneous flow and the accumulated flow of the inlet and the outlet of the auxiliary oil tank, and is convenient for controlling the flushing process of the auxiliary oil tank.
12. The electric three-way ball valve is used for switching a system self-circulation purification mode and an oil supply working mode.
13. The sampling valve is used for carrying out field station assay after the cleaning oil liquid is sampled.
14. The oil online detector is used for detecting the quality grade of self-circulation of a system and oil recovered from an auxiliary oil tank, is provided with a printer and can print a detection report in real time.
Drawings
The invention is further illustrated by the following figures and examples.
Fig. 1 is a hydraulic schematic diagram of the present invention.
Fig. 2 is a schematic diagram of the filling principle of the invention.
FIG. 3 is a schematic diagram of the recovery of oil from the K/UZC 1700 auxiliary tank of the invention.
FIG. 4 is a schematic view of the K/UZC 1700 type auxiliary fuel tank pressure flushing of the present invention.
FIG. 5 is a schematic diagram of the self-circulation purification of the present invention.
In the figure: 1-oil tank, 2-oil suction filter, 3-oil supply motor pump set, 4-electric proportional overflow valve, 5-oil filter set, 6-temperature sensor, 7-pressure sensor, 8-in-situ metering port, 9-flowmeter, 10-electric three-way ball valve, 11-oil return motor pump set, 12-sampling valve, 13-oil on-line detector and 14-oil return filter.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Example 1:
referring to fig. 1-5, the high-pressure flushing system for the auxiliary oil tank of the airplane comprises an oil tank 1 for containing cleaning liquid, an oil suction filter 2 is arranged inside the oil tank 1, the oil suction filter 2 is connected with an oil supply motor pump unit 3, an outlet of the oil supply motor pump unit 3 is connected with an oil filter unit 5, a pipeline behind the oil filter unit 5 is connected with a flowmeter 9, an electric three-way ball valve 10 is connected behind the flowmeter 9, one branch of the electric three-way ball valve 10 is connected with an oil return pipe through a communicating pipe, and the oil return pipe is connected with the oil tank 1 through an oil return filter 14; the other branch of the electric three-way ball valve 10 is connected with an auxiliary oil tank to be cleaned, and an outlet of the auxiliary oil tank is connected with a flow meter and an oil return motor-pump set 11. The system can be used for providing high-pressure cleaning liquid in the cleaning process of the auxiliary fuel tank of the airplane, and further thoroughly washing oil stains and potential pollutants deposited on the inner wall of the auxiliary fuel tank. Two sets of motor pump sets are respectively used as a filling, pressure supply cleaning power source and an oil return boosting power source, so that filling, pressure flushing and oil recovery of the cleaning oil of the auxiliary oil tank can be realized.
Furthermore, a temperature sensor 6, a pressure sensor 7 and an in-situ metering port 8 are sequentially arranged on a pipeline between the oil filter group 5 and the flowmeter 9. Be used for monitored control system washing fluid temperature through foretell temperature sensor 6, stop the warning immediately when fluid temperature surpasss the settlement, prevent that the temperature rise of fluid from causing the conflagration hidden danger in the cleaning process. The system operating pressure is monitored through a pressure sensor 7, and the system is immediately stopped and alarmed when the maximum value is exceeded. Through the in-situ metering port 8 for in-situ metering of the pressure sensor.
Further, the oil supply motor-pump unit 3 adopts a gear pump as a cleaning power source, is used for filling kerosene into the auxiliary oil tank before rotary cleaning, and is used for providing a certain pressure flushing source for the auxiliary oil tank during pressure cleaning. Meanwhile, the device can also be used for self circulation of oil, and the output flow can be adjusted by matching with a variable frequency motor.
Further, an oil online detector 13 is installed on a pipeline on the oil return pipe and before the oil return filter 14. The oil online detector 13 is used for detecting the quality grade of the self-circulation of the system and the recovered oil of the auxiliary oil tank, is provided with a printer and can print a detection report in real time.
Furthermore, a temperature sensor 6 and a sampling valve 12 are installed on the oil return pipe and between the oil return motor pump set 11 and the oil online detector 13. The sampling valve 12 is used for performing field-station test after the cleaning oil liquid is sampled.
Furthermore, an electric proportional overflow valve 4 is installed on a pipeline between an outlet of the oil supply motor pump unit 3 and the oil filter unit 5. The electric proportional relief valve 4 is defined and adjusted.
Furthermore, the oil suction filter 2, the oil filter group 5 and the oil return filter 14 all adopt a pressure difference alarm oil filter with a large flow specification.
Further, the oil online detector 13 is used for detecting the quality grade of the oil recovered from the self-circulation and the auxiliary oil tank of the system, is provided with a printer, and can print a detection report in real time.
Example 2:
the method for flushing the auxiliary oil tank of the airplane by adopting the high-pressure flushing system of the auxiliary oil tank of the airplane adopts the fixed oil tank 1 as a cleaning oil source and is provided with the oil supply motor-pump unit 3 and the oil return motor-pump unit 11, so that the filling, pressure flushing, oil recovery and oil self-cleaning of cleaning oil in the cleaning process of the auxiliary oil tank are realized.
The specific method for filling the cleaning oil liquid before the auxiliary oil tank is rotationally cleaned comprises the following steps:
referring to fig. 2, an electric three-way ball valve 10 switches a system oil path to an oil supply branch, an oil supply motor pump set 3 pumps cleaning oil in an oil tank 1, the cleaning oil is filtered by an oil filter set 5 and then is added into a secondary oil tank through a gravity oil filling port of the secondary oil tank, a pressurization port of the secondary oil tank is firstly opened before filling, a sensor port and an oil pipeline port on the secondary oil tank are reliably plugged by using a special plug, the pressurization port is plugged by using the special plug after the oil filling is finished, the situation that gas in the secondary oil tank cannot be timely discharged to damage the secondary oil tank when the oil is filled is prevented, and a flowmeter is used for monitoring instantaneous flow and total flow of filling when the cleaning oil is filled;
the specific method for recovering the cleaning oil after the auxiliary oil tank is rotationally cleaned comprises the following steps:
referring to fig. 3, after the auxiliary oil tank is cleaned in a rotating manner, the cleaned oil is pumped back to the equipment oil tank 1 from a sensor interface of the auxiliary oil tank through an oil return motor pump set 11, an oil return filter 14 and an oil online detector 13 are arranged on an oil return branch, and the cleaned oil is detected online, filtered and purified and then stored in the oil tank for later use; before oil is pumped back into the oil tank, the pressurizing port plug is opened to ensure that the air pressure in the oil tank keeps smooth with the atmosphere, so that the oil tank is prevented from being damaged by vacuum formed in the oil tank during oil pumping; the flow meter 9 is used for monitoring the instantaneous flow and the total flow during the oil liquid extraction;
the specific method of pressure flushing comprises the following steps:
the pressure flushing of the auxiliary oil tank uniformly adopts the way that cleaning oil is filled from a sensor interface, and a flushing joint adopts a graded flushing joint, so that the flushing oil is fully diffused in the oil tank to achieve the sectional type pressure flushing of the auxiliary oil tank;
the oil hydraulic pressure flushing method of the K/UZC 1700 type auxiliary oil tank comprises the following steps:
referring to fig. 4, the pressure flushing of the auxiliary oil tank adopts a pressure supply circulation mode, an electric three-way ball valve 10 switches a system oil path to an oil supply branch, an oil supply motor pump set 3 extracts and pressurizes oil in the oil tank, the oil is injected into the oil tank from a sensor connector of the auxiliary oil tank through a customized oil injection connector, three sensor connectors are arranged on the auxiliary oil tank and are respectively positioned at the front section, the middle section and the rear section, equipment is respectively injected with oil from the sensor connectors of 1, 2 and 3 branches separately and sequentially during pressure cleaning, and different positions of the inner wall of the oil tank are flushed step by step;
when flushing, the oil return motor pump set 11 pumps cleaning oil to the oil tank through an oil return branch from the rest of sensor interfaces of the auxiliary oil tank, namely when oil is injected from the interfaces No. 1 and No. 3 respectively, oil is pumped from the oil suction path of the interface No. 2; when oil is injected from the No. 2 interface, oil is pumped from the oil suction path of the No. 3 interface;
an oil online detector 13 is arranged on the oil return branch path, the quality grade of the flushing oil is detected in real time, the flushing effect is further detected indirectly, and in addition, an oil return filter 14 on the oil return path purifies the flushing oil, so that the oil reuse rate is improved;
in order to control the oil mass balance in the oil tank when the auxiliary oil tank is subjected to pressure supply circulating flushing, a flowmeter 9 monitors the filling instantaneous flow, the filling total flow and the instantaneous flow and the pumping total flow when the oil tank is pumped out of the system in real time, the control system carries out accounting by acquiring flow values and periodically controls the output of a pump set so as to achieve the stable circulation of the system; under the high-pressure flushing working condition, a pressurizing connector of the auxiliary oil tank is opened, the inside of the auxiliary oil tank is kept communicated with the atmosphere, and the oil tank is prevented from being damaged due to abnormal air pressure inside the auxiliary oil tank;
the FYX-800B type auxiliary oil tank oil hydraulic pressure flushing method comprises the following steps:
the flushing principle is consistent with the flushing method of the K/UZC 1700 type auxiliary oil tank, oil is respectively injected from the sensor joints at the two ends of the oil tank in sequence and independently, different positions of the inner wall of the oil tank are flushed, the recovery of the cleaned oil is consistent with the scheme of the K/UZC 1700 type auxiliary oil tank, and the oil is extracted from the non-oil-injected sensor joint;
during flushing, a pressurizing interface of the auxiliary oil tank is opened, the inside of the auxiliary oil tank is kept communicated with the atmosphere, damage to the oil tank due to abnormal air pressure in the auxiliary oil tank is prevented, a flow meter monitors the flow of the system in real time, and the output of a pump set is periodically controlled, so that the system is stably circulated;
the specific method for self-cleaning the oil liquid comprises the following steps:
referring to fig. 5, the equipment switches the system oil path to the self-circulation branch through the electric three-way ball valve 10, the oil supply motor pump set 3 is used for driving oil in the oil tank to circulate, and the cleaning oil in the oil tank is filtered through oil filter in the pipeline in the circulation process so as to achieve the purpose of oil purification and self-cleaning.
Claims (10)
1. Aircraft bellytank high pressure rinse-system, its characterized in that: the cleaning device comprises an oil tank (1) for containing cleaning fluid, wherein an oil suction filter (2) is arranged inside the oil tank (1), the oil suction filter (2) is connected with an oil supply motor pump set (3), an outlet of the oil supply motor pump set (3) is connected with an oil filter set (5), a pipeline behind the oil filter set (5) is connected with a flowmeter (9), an electric three-way ball valve (10) is connected behind the flowmeter (9), one branch of the electric three-way ball valve (10) is connected with an oil return pipe through a communicating pipe, and the oil return pipe is connected with the oil tank (1) through an oil return filter (14); the other branch of the electric three-way ball valve (10) is connected with an auxiliary oil tank to be cleaned, and an outlet of the auxiliary oil tank is connected with a flow meter and an oil return motor pump set (11).
2. The aircraft fuel tank high-pressure flushing system of claim 1, characterized in that: and a temperature sensor (6), a pressure sensor (7) and an in-situ metering port (8) are sequentially arranged on a pipeline between the oil filter group (5) and the flowmeter (9).
3. The aircraft drop tank high pressure flushing system of claim 1, wherein: the oil supply motor pump set (3) adopts a gear pump as a cleaning power source, is used for filling kerosene into the auxiliary oil tank before rotary cleaning, and is used for providing a certain pressure flushing source for the auxiliary oil tank during pressure cleaning.
4. The aircraft drop tank high pressure flushing system of claim 1, wherein: and an oil online detector (13) is arranged on a pipeline which is positioned on the oil return pipe and is positioned in front of the oil return filter (14).
5. The aircraft drop tank high pressure flushing system of claim 4, wherein: and a temperature sensor (6) and a sampling valve (12) are arranged on the oil return pipe and are positioned between the oil return motor pump set (11) and the oil online detector (13).
6. The aircraft fuel tank high-pressure flushing system of claim 4, characterized in that: and an electric proportional overflow valve (4) is arranged on a pipeline between the outlet of the oil supply motor pump set (3) and the oil filter set (5).
7. The aircraft drop tank high pressure flushing system of claim 1, wherein: the oil suction filter (2), the oil filter group (5) and the oil return filter (14) are all pressure difference alarm oil filters with large flow specifications.
8. The aircraft drop tank high pressure flushing system of claim 5, wherein: the oil online detector (13) is used for detecting the quality grade of the self-circulation of the system and the recovered oil of the auxiliary oil tank, is provided with a printer and can print a detection report in real time.
9. A method for flushing an aircraft drop tank by using the high-pressure flushing system for the aircraft drop tank as claimed in any one of claims 1 to 8, wherein: a fixed oil tank (1) is used as a cleaning oil source, and an oil supply motor pump set (3) and an oil return motor pump set (11) are arranged, so that filling, pressure flushing, oil recovery and oil self-cleaning of cleaning oil in the cleaning process of the auxiliary oil tank are realized.
10. The method for flushing the auxiliary fuel tank of the aircraft by using the high-pressure flushing system for the auxiliary fuel tank of the aircraft as claimed in claim 9, wherein the method comprises the following steps:
the specific method for filling the cleaning oil liquid before the auxiliary oil tank is rotationally cleaned comprises the following steps:
an electric three-way ball valve (10) switches a system oil path to an oil supply branch, an oil supply motor pump set (3) extracts cleaning oil in an oil tank (1), the cleaning oil is filtered by an oil filter set (5) and then added into a secondary oil tank through a gravity oil filling port of the secondary oil tank, a booster port of the secondary oil tank is opened before filling, a sensor port and an oil conveying pipe port on the secondary oil tank are reliably plugged by using a special plug, after the oil filling is finished, the booster port is plugged by using the special plug, the situation that gas in the secondary oil tank cannot be timely discharged to damage the secondary oil tank during the oil filling is prevented, and a flowmeter is used for monitoring instantaneous flow and total filling flow during the cleaning oil filling;
the specific method for recovering the cleaning oil after the auxiliary oil tank is rotationally cleaned comprises the following steps:
after the auxiliary oil tank is cleaned in a rotating mode, cleaned oil is pumped back to the equipment oil tank (1) from a sensor interface of the auxiliary oil tank through an oil return motor pump set (11), an oil return filter (14) and an oil online detector (13) are arranged on an oil return branch, and the cleaned oil is subjected to online detection, filtering and purification and then is stored in the oil tank for standby application; before oil is pumped back into the oil tank, the pressurizing port plug is opened to ensure that the air pressure in the oil tank keeps smooth with the atmosphere, so that the oil tank is prevented from being damaged by vacuum formed in the oil tank during oil pumping; the flowmeter (9) is used for monitoring the instantaneous flow and the total flow of the extracted oil liquid when the oil liquid is extracted;
the specific method of pressure flushing is as follows:
the pressure flushing of the auxiliary oil tank uniformly adopts the way that cleaning oil is filled from a sensor interface, and a flushing joint adopts a graded flushing joint, so that the flushing oil is fully diffused in the oil tank to achieve the sectional type pressure flushing of the auxiliary oil tank;
the oil hydraulic pressure flushing method of the K/UZC 1700 type auxiliary oil tank comprises the following steps:
the pressure flushing of the auxiliary oil tank adopts a pressure supply circulation mode, an electric three-way ball valve (10) switches a system oil way to an oil supply branch, an oil supply motor pump set (3) extracts and pressurizes oil in the oil tank, the oil is injected into the oil tank from a sensor connector of the auxiliary oil tank through a customized oil injection connector, three sensor connectors are arranged on the auxiliary oil tank and are respectively positioned at the front section, the middle section and the rear section, equipment is respectively injected with oil from the sensor connectors of 1, 2 and 3 branches separately and sequentially during pressure cleaning, and different positions of the inner wall of the oil tank are flushed step by step;
when the auxiliary oil tank is flushed, the oil return motor pump set (11) pumps cleaning oil to the oil tank through an oil return branch from the rest sensor interfaces of the auxiliary oil tank, namely when the oil is respectively injected from the interfaces No. 1 and No. 3, the oil is pumped from the oil suction path of the interface No. 2; when oil is injected from the No. 2 interface, oil is pumped from the oil suction path of the No. 3 interface;
an oil online detector (13) is arranged on the oil return branch path, the quality grade of the flushing oil is detected in real time, the flushing effect is further detected indirectly, in addition, an oil return filter (14) on the oil return path purifies the flushing oil, and the oil reuse rate is improved;
in order to control the oil mass balance in the oil tank when the auxiliary oil tank is subjected to pressure supply circulating flushing, a flowmeter (9) monitors the filling instantaneous flow, the filling total flow and the instantaneous flow and the pumping total flow when the oil tank is pumped out of the system in real time, the control system carries out accounting by collecting all flow values and controls the output of a pump set periodically so as to achieve the stable circulation of the system; under the high-pressure flushing working condition, a pressurizing connector of the auxiliary oil tank is opened, the inside of the auxiliary oil tank is kept communicated with the atmosphere, and the oil tank is prevented from being damaged due to abnormal air pressure inside the auxiliary oil tank;
the FYX-800B type auxiliary oil tank oil hydraulic pressure flushing method comprises the following steps:
the flushing principle is consistent with the flushing method of the K/UZC 1700 type auxiliary oil tank, oil is respectively injected from the sensor joints at the two ends of the oil tank in sequence and independently, different positions of the inner wall of the oil tank are flushed, the recovery of the cleaned oil is consistent with the scheme of the K/UZC 1700 type auxiliary oil tank, and the oil is extracted from the non-oil-injected sensor joint;
during flushing, a pressurizing interface of the auxiliary oil tank is opened, the inside of the auxiliary oil tank is kept communicated with the atmosphere, the oil tank is prevented from being damaged due to abnormal air pressure inside the auxiliary oil tank, a flow meter monitors the flow of the system in real time, and the output of a pump set is periodically controlled, so that the system is stably circulated;
the specific method for self-cleaning the oil liquid comprises the following steps:
the equipment is switched to a self-circulation branch circuit through an electric three-way ball valve (10), an oil supply motor pump set (3) is used for driving oil tank oil to circulate, and oil in the circulation process is filtered through oil filter in a pipeline to clean the oil in the oil tank, so that the purpose of self-cleaning of oil purification is achieved.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211015894.2A CN115446055A (en) | 2022-08-23 | 2022-08-23 | High-pressure flushing system and method for auxiliary fuel tank of airplane |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211015894.2A CN115446055A (en) | 2022-08-23 | 2022-08-23 | High-pressure flushing system and method for auxiliary fuel tank of airplane |
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| CN218093678U (en) * | 2022-08-23 | 2022-12-20 | 凌云(宜昌)航空装备工程有限公司 | High-pressure flushing system for auxiliary fuel tank of airplane |
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2022
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| CN205136235U (en) * | 2015-11-10 | 2016-04-06 | 厦门船舶重工股份有限公司 | New -type cluster oil rinses pump package |
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