CN114033590A - Open-loop adjusting control device for oil supply switching of combined pump - Google Patents
Open-loop adjusting control device for oil supply switching of combined pump Download PDFInfo
- Publication number
- CN114033590A CN114033590A CN202111310810.3A CN202111310810A CN114033590A CN 114033590 A CN114033590 A CN 114033590A CN 202111310810 A CN202111310810 A CN 202111310810A CN 114033590 A CN114033590 A CN 114033590A
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- valve
- pump
- switching
- oil
- gear pump
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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
- F02M37/04—Feeding by means of driven pumps
- F02M37/041—Arrangements for driving gear-type pumps
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Rotary Pumps (AREA)
Abstract
The invention belongs to the field of mechanical hydraulic control devices, relates to the aspect of reducing the heat efficiency loss of a system, and particularly relates to an open-loop adjusting and controlling device for switching and selecting oil supply of a combined pump. The open-loop adjusting and controlling device comprises a first gear pump (8), a second gear pump (9), a pump switching valve (10), a constant pressure valve (11), an oil return valve (12), a conversion valve (13) and a pump switching electromagnetic valve (14). The invention can meet the use requirement of switching the fuel under the state of the combined pump; the problem of when fuel control system is in the demand of low discharge state, the mechanical power loss of single gear pump and current regulation control device can't use in combination pump oil feeding system is solved.
Description
Technical Field
The invention belongs to the field of mechanical hydraulic control devices, relates to the aspect of reducing the heat efficiency loss of a system, and particularly relates to an open-loop adjusting and controlling device for switching and selecting oil supply of a combined pump.
Background
The existing fuel regulation control device is usually suitable for regulating the quantitative oil provided by a single gear pump, and the oil supply of a combined pump cannot be regulated. The fuel cannot be effectively utilized under the condition of small flow demand, and the temperature of the system is increased and the mechanical power loss of the pump is caused.
Referring to fig. 1, a conventional fuel regulation control apparatus system includes: the device comprises a constant pressure valve 1, an electro-hydraulic servo valve 2, an oil return valve 3, a metering valve 4, a differential pressure valve 5 and a gear pump 6. The oil supply inlet 1 of the main pump is high-pressure oil; the metering fuel outlet 2 is working fuel; the outlet 1 of the constant pressure valve is constant pressure oil with a constant value of 2 MPa; the oil return tank 7 provides low-pressure oil with a fixed value of 0.2 MPa; the outlet of the electro-hydraulic servo valve 2 is control oil for controlling the movement of the metering valve 4. In order to ensure that the flow of the metered fuel at the outlet of the metering valve is controllable, the pressure difference between the inlet and the outlet of the metering valve and the displacement of the metering valve are required to be controllable. In the device, a pressure control system is formed by a differential pressure valve 5 and an oil return valve 3, and a metering valve displacement closed-loop control system is formed by an electro-hydraulic servo valve 2 and a constant pressure valve 1. If the pressure at the oil supply position of the main pump suddenly increases, when the displacement control closed loop is not changed, the oil way in the differential pressure valve 5 is communicated with the oil way at the metering fuel outlet, so that the oil discharging process is formed, meanwhile, the pressure of the left cavity of the oil return valve is reduced, the oil return valve is opened leftwards, the fuel at the main pump is discharged to the oil return oil tank, and the stable control of the pressure difference between the inlet and the outlet of the metering valve is completed.
Under the cruising state of the airplane, the working state of the fuel control system is as follows: the gear pump 6 has medium and high rotating speed, and the displacement opening of the metering valve 4 is small. At the moment, a large amount of fuel oil returns to the system oil tank through the oil return valve 3 and is supplied to the gear pump 6 as an oil source after circulation, so that the temperature in front of the gear pump 6 is increased, and the working performance of the gear pump is influenced. Because a large amount of fuel is inefficiently utilized by the system, the mechanical work of the gear pump 6 is converted into heat, resulting in power loss and waste.
Disclosure of Invention
The purpose of the invention is as follows: the fuel regulating system for performing open-loop control on fuel supply of the combined pump through the electromagnetic valve is provided, and can meet the use requirement of switching fuel under the state of the combined pump; the problem of when fuel control system is in the demand of low discharge state, the mechanical power loss of single gear pump and current regulation control device can't use in combination pump oil feeding system is solved.
The technical scheme is as follows: the open-loop adjusting control device comprises a first gear pump 8, a second gear pump 9, a pump switching valve 10, a constant pressure valve 11, an oil return valve 12, a conversion valve 13 and a pump switching electromagnetic valve 14;
the first gear pump 8, the pump switching valve 10 and the constant pressure valve 11 are communicated in sequence; the second gear pump 9, the pump switching valve 10 and the constant pressure valve 11 are communicated in sequence; the second gear pump 9 is communicated with the oil return valve 12; the oil return valve 12 returns to the front of the first gear pump 8 and the second gear pump 9; the conversion valve 13 is respectively communicated with the oil return valve 12, the pump switching valve 10 and the constant pressure valve 11; the pump switching electromagnetic valve 14 is communicated with the constant pressure valve 11 and the conversion valve 13;
when the engine is started and the pump switching solenoid valve is energized: the outlet of the pump switching electromagnetic valve is used for returning oil and flows to the switching valve 13, and the switching valve 13 moves upwards under the action of internal spring force; the constant pressure oil of the constant pressure valve 11 goes to the right chamber of the oil return valve and the upper chamber of the pump switching valve 10 through the switching valve 13; the oil return valve moves leftwards to block the communication of the high-pressure oil at the outlet of the second gear pump 9 and the oil return; the pump switching valve 10 moves downwards, and high-pressure oil at the outlet of the first gear pump 8 and high-pressure oil at the outlet of the second gear pump 9 are sent to the fuel regulator through the pump switching valve 10;
when the engine is in a cruising state, the pump switching electromagnetic valve is powered off: the outlet of the pump switching electromagnetic valve is constant pressure oil and flows to the switching valve 13, and the switching valve 13 moves downwards; the constant pressure oil of the constant pressure valve 11 goes to the left cavity of the oil return valve and the lower cavity of the pump switching valve 10 through the conversion valve 13; the oil return valve moves rightwards to enable high-pressure oil at the outlet of the second gear pump 9 to be communicated with oil return; the pump switching valve 10 moves upwards, high-pressure oil at the outlet of the first gear pump 8 passes through the pump switching valve 10 and goes to the fuel regulator, and the pump switching valve 10 cuts off the communication between the high-pressure oil at the outlet of the second gear pump 9 and the fuel regulator.
Further, a bidirectional restrictor 15 is communicated between the conversion valve 13 and the lower cavity of the pump switching valve 10, and is used for buffering oil pressure during the switching process of the pump switching valve 10.
Further, a bidirectional throttler 15 is communicated between the conversion valve 13 and the left cavity of the oil return valve and is used for buffering oil pressure in the switching process of the oil return valve.
Further, the first gear pump 8, the second gear pump 9, and the centrifugal pump 16 constitute a combined pump; and outlet return oil of the centrifugal pump 16 is respectively communicated with inlets of the first gear pump 8 and the second gear pump 9 and used for primary pressurization.
Further, a check valve 17 is communicated between the second gear pump 9 and the pump switching valve 10 for preventing the high-pressure oil at the pump switching valve 10 from flowing to the second gear pump 9 and the oil return valve.
Further, the outlet flow rate of the first gear pump 8 is smaller than the outlet flow rate of the second gear pump 9.
Further, the outlet flow rate of the first gear pump 8 is within 5000 kg/h.
Further, the pump switching valve 10, the constant pressure valve 11, the oil return valve 12, and the switching valve 13 are respectively installed in the corresponding valve bushings. .
The invention has the technical effects that: according to the invention, the oil distributing function of the inlet high-pressure oil is realized by selecting the combined pump; the open-loop control device is adopted to switch the combined pump, so that the selection of the fuel regulator on high-pressure oil under the condition of different flow requirements can be realized; in addition, an open-loop control device is adopted, so that the mechanical efficiency loss of the combined pump can be reduced, and the temperature rise of oil is reduced; by adopting the bidirectional throttler, oil can be buffered, the service life of the valve is prolonged, and the working safety of the device is guaranteed.
Drawings
FIG. 1 is a control schematic diagram of a conventional single gear pump fuel regulation control device;
fig. 2 is a schematic diagram of an open-loop regulation control device for oil supply switching of a combined pump.
Detailed Description
In the embodiment, an open-loop regulation control device for oil supply switching of a combination pump is provided, and the open-loop regulation control device comprises a first gear pump 8, a second gear pump 9, a pump switching valve 10, a constant pressure valve 11, an oil return valve 12, a conversion valve 13 and a pump switching solenoid valve 14.
Wherein, the first gear pump 8, the pump switching valve 10 and the constant pressure valve 11 are communicated in sequence; the second gear pump 9, the pump switching valve 10 and the constant pressure valve 11 are communicated in sequence; the second gear pump 9 is communicated with the oil return valve 12; the oil return valve 12 returns to the front of the first gear pump 8 and the second gear pump 9; the conversion valve 13 is respectively communicated with the oil return valve 12, the pump switching valve 10 and the constant pressure valve 11; the pump switching solenoid valve 14 communicates with the constant pressure shutter 11 and the switching shutter 13.
The pump switching valve 10 and the bush constitute a two-position two-way valve; the oil return valve and the bushing form a two-position two-way valve; the conversion valve is a three-position four-way valve. The inlet return oil of the pump switching solenoid valve 14 is communicated with the inlet return oil of the centrifugal pump.
The oil control process of the embodiment is as follows: when the engine is started and the pump switching solenoid valve is energized: the outlet of the pump switching electromagnetic valve is used for returning oil and flows to the switching valve 13, and the switching valve 13 moves upwards under the action of internal spring force; the constant pressure oil of the constant pressure valve 11 goes to the right chamber of the oil return valve and the upper chamber of the pump switching valve 10 through the switching valve 13; the oil return valve moves leftwards to block the communication of the high-pressure oil at the outlet of the second gear pump 9 and the oil return; the pump switching valve 10 moves downwards, and high-pressure oil at the outlet of the first gear pump 8 and high-pressure oil at the outlet of the second gear pump 9 are sent to the fuel regulator through the pump switching valve 10.
When the engine is in a cruising state, the pump switching electromagnetic valve is powered off: the outlet of the pump switching electromagnetic valve is constant pressure oil and flows to the switching valve 13, and the switching valve 13 moves downwards; the constant pressure oil of the constant pressure valve 11 goes to the left cavity of the oil return valve and the lower cavity of the pump switching valve 10 through the conversion valve 13; the oil return valve moves rightwards to enable high-pressure oil at the outlet of the second gear pump 9 to be communicated with oil return; the pump switching valve 10 moves upwards, high-pressure oil at the outlet of the first gear pump 8 passes through the pump switching valve 10 and goes to the fuel regulator, and the pump switching valve 10 cuts off the communication between the high-pressure oil at the outlet of the second gear pump 9 and the fuel regulator.
In this embodiment, a bidirectional restrictor 15 is communicated between the conversion valve 13 and the lower chamber of the pump switching valve 10, and is used for buffering oil pressure during switching of the pump switching valve 10. A bidirectional throttler 15 is communicated between the conversion valve 13 and the left cavity of the oil return valve and is used for buffering oil pressure in the switching process of the oil return valve. A check valve 17 is communicated between the second gear pump 9 and the pump switching valve 10 for preventing the high-pressure oil at the pump switching valve 10 from flowing to the second gear pump 9 and the oil return valve.
Further, the first gear pump 8, the second gear pump 9, and the centrifugal pump 16 constitute a combined pump; and outlet return oil of the centrifugal pump 16 is respectively communicated with inlets of the first gear pump 8 and the second gear pump 9 and used for primary pressurization.
In the embodiment, the pressures at the two ends of the conversion valve are controlled mainly by the pump switching electromagnetic valve, so that the pressure values at the two ends of the pump switching valve and the oil return valve are changed, the valves are moved, and the oil distribution switching function of the combined pump is realized.
The technical effects of the embodiment are as follows: when the engine is started, the pump switching electromagnetic valve is electrified, the switching valve is in a spring reset state, the pump switching valve is in a double-pump simultaneous oil supply state, the oil return valve is closed, and the double-pump oil supply state is adopted at the moment, so that fuel oil is fully combusted in the starting process. After the engine is started, when the oil demand of the engine is small, the pump switching electromagnetic valve is powered off, the pump switching valve is in a single-pump (first gear pump) working state, the oil return valve connects the fuel oil at the outlet of the second gear pump with the inlet, the pressure after the pump of the second gear pump is reduced, the power loss of the second gear pump is reduced, and the temperature rise is reduced. When the oil demand of the engine is large, the oil supply amount of the second gear pump cannot meet the requirement, the pump switching electromagnetic valve is electrified, the pump switching valve is in a state that the two pumps supply oil simultaneously, and the oil return valve is closed, so that the oil supply of the engine is ensured.
The invention is mainly used in front of a fuel regulator of certain engine accessories. The main function is to switch the oil supply of the combined pump according to the signal of the pump switching electromagnetic valve given by the electronic controller, thereby reducing the heat energy consumption of the fuel control system.
Specifically, taking a certain engine work as an example, the specific product performance requirements that can be achieved by the embodiment are as follows:
1) working pressure is less than or equal to 13MPa
2) The switching time is less than or equal to 2ms
3) The pressure fluctuation is less than or equal to 7 percent during switching.
Claims (8)
1. An open-loop adjusting and controlling device for oil supply switching of a combination pump is characterized by comprising a first gear pump (8), a second gear pump (9), a pump switching valve (10), a constant pressure valve (11), an oil return valve (12), a conversion valve (13) and a pump switching electromagnetic valve (14);
the first gear pump (8), the pump switching valve (10) and the constant pressure valve (11) are communicated in sequence; the second gear pump (9), the pump switching valve (10) and the constant pressure valve (11) are communicated in sequence; the second gear pump (9) is communicated with the oil return valve (12); the oil return valve (12) returns to the front of the first gear pump (8) and the second gear pump (9); the conversion valve (13) is respectively communicated with the oil return valve (12), the pump switching valve (10) and the constant pressure valve (11); the pump switching electromagnetic valve (14) is communicated with the constant pressure valve (11) and the conversion valve (13).
2. An open-loop regulation control device according to claim 1, characterized in that a bidirectional restrictor (15) is communicated between the conversion valve (13) and the lower chamber of the pump switching valve (10) for buffering the oil pressure during the switching of the pump switching valve (10).
3. An open-loop regulation control device according to claim 1, characterized in that a bidirectional restrictor (15) is communicated between the conversion valve (13) and the left chamber of the oil return valve for buffering the oil pressure during the switching process of the oil return valve.
4. An open-loop regulation control apparatus according to claim 1, characterized in that the first gear pump (8), the second gear pump (9) and the centrifugal pump (16) constitute a combined pump; and outlet return oil of the centrifugal pump (16) is respectively communicated with inlets of the first gear pump (8) and the second gear pump (9) and is used for primary pressurization.
5. An open-loop regulation control device according to claim 1, characterized in that a check valve (17) is communicated between the second gear pump (9) and the pump switching valve (10) for preventing high-pressure oil at the pump switching valve (10) from flowing to the second gear pump (9) and the oil return valve.
6. An open-loop regulation control apparatus according to claim 1, characterized in that the outlet flow of the first gear pump (8) is smaller than the outlet flow of the second gear pump (9).
7. An open-loop regulation control apparatus according to claim 1 characterized in that the outlet flow of the first gear pump (8) is within 5000 kg/h.
8. An open-loop regulation control device according to claim 1, characterized in that the pump switching valve (10), the constant pressure valve (11), the oil return valve (12), and the switching valve (13) are respectively installed in the corresponding valve bushings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111310810.3A CN114033590B (en) | 2021-11-05 | 2021-11-05 | Open-loop regulation control device for oil supply switching of combined pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111310810.3A CN114033590B (en) | 2021-11-05 | 2021-11-05 | Open-loop regulation control device for oil supply switching of combined pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114033590A true CN114033590A (en) | 2022-02-11 |
| CN114033590B CN114033590B (en) | 2023-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111310810.3A Active CN114033590B (en) | 2021-11-05 | 2021-11-05 | Open-loop regulation control device for oil supply switching of combined pump |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07233787A (en) * | 1994-02-22 | 1995-09-05 | Unisia Jecs Corp | Variable displacement oil pump |
| JP2004176893A (en) * | 2002-11-29 | 2004-06-24 | Komatsu Ltd | Hydraulic circuit for differential cylinder, and hydraulic power unit apparatus |
| JP2009203811A (en) * | 2008-02-26 | 2009-09-10 | Toyota Industries Corp | Variable displacement type gear pump |
| JP2009287688A (en) * | 2008-05-29 | 2009-12-10 | Toyota Motor Corp | Power transmitting device |
| CN102365441A (en) * | 2009-03-25 | 2012-02-29 | 伍德沃德公司 | Variable actuation pressure system for independent pressure control |
| CN102575587A (en) * | 2009-10-06 | 2012-07-11 | 斯奈克玛 | Circuit for supplying fuel to an aircraft engine |
| CN105370413A (en) * | 2014-08-25 | 2016-03-02 | 中航商用航空发动机有限责任公司 | Aircraft engine fuel oil metering system and control method thereof |
| CN110318886A (en) * | 2019-07-16 | 2019-10-11 | 中国航发沈阳发动机研究所 | A kind of fuel metering system and its matching process based on duplex gear pump |
-
2021
- 2021-11-05 CN CN202111310810.3A patent/CN114033590B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07233787A (en) * | 1994-02-22 | 1995-09-05 | Unisia Jecs Corp | Variable displacement oil pump |
| JP2004176893A (en) * | 2002-11-29 | 2004-06-24 | Komatsu Ltd | Hydraulic circuit for differential cylinder, and hydraulic power unit apparatus |
| JP2009203811A (en) * | 2008-02-26 | 2009-09-10 | Toyota Industries Corp | Variable displacement type gear pump |
| JP2009287688A (en) * | 2008-05-29 | 2009-12-10 | Toyota Motor Corp | Power transmitting device |
| CN102365441A (en) * | 2009-03-25 | 2012-02-29 | 伍德沃德公司 | Variable actuation pressure system for independent pressure control |
| CN102575587A (en) * | 2009-10-06 | 2012-07-11 | 斯奈克玛 | Circuit for supplying fuel to an aircraft engine |
| CN105370413A (en) * | 2014-08-25 | 2016-03-02 | 中航商用航空发动机有限责任公司 | Aircraft engine fuel oil metering system and control method thereof |
| CN110318886A (en) * | 2019-07-16 | 2019-10-11 | 中国航发沈阳发动机研究所 | A kind of fuel metering system and its matching process based on duplex gear pump |
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| CN114033590B (en) | 2023-08-04 |
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