CN114033590B - Open-loop regulation control device for oil supply switching of combined pump - Google Patents
Open-loop regulation control device for oil supply switching of combined pump Download PDFInfo
- Publication number
- CN114033590B CN114033590B CN202111310810.3A CN202111310810A CN114033590B CN 114033590 B CN114033590 B CN 114033590B CN 202111310810 A CN202111310810 A CN 202111310810A CN 114033590 B CN114033590 B CN 114033590B
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- valve
- pump
- switching
- gear pump
- oil
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Classifications
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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
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 control device for switching and selecting oil supply of a combined pump. 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 switching valve (13) and a pump switching electromagnetic valve (14). The invention can meet the use requirement of switching fuel under the combined pump state; the problems that when the fuel control system is in a small flow state, the mechanical power of a single gear pump is lost, and the existing adjusting control device cannot be used in the combined pump oil supply system are 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 control device for switching and selecting oil supply of a combined pump.
Background
The existing fuel oil adjusting and controlling device is generally suitable for adjusting quantitative oil provided by a single gear pump, and oil supply of a combined pump cannot be adjusted. The fuel cannot be effectively utilized in the state of small flow demand, and the system temperature is increased, so that the mechanical power loss of the pump is reduced.
Referring to fig. 1, a conventional fuel regulation control system includes: the constant pressure valve 1, the electrohydraulic servo valve 2, the oil return valve 3, the metering valve 4, the differential pressure valve 5 and the gear pump 6. The main pump oil supply inlet 1 is high-pressure oil; the metering fuel outlet 2 is working fuel; the fixed pressure valve outlet 1 is fixed pressure oil with a fixed value of 2 MPa; the oil return tank 7 provides low-pressure oil with a constant value of 0.2 MPa; the outlet of the electrohydraulic servo valve 2 is control oil which is used for controlling the movement of the metering valve 4. In order to ensure that the metering fuel flow of the outlet of the metering valve is controllable, the pressure difference between the inlet and the outlet of the metering valve and the displacement thereof 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 electrohydraulic servo valve 2 and a constant pressure valve 1. If the pressure of the oil supply part of the main pump suddenly increases, when the displacement control closed loop is unchanged, an oil way in the differential pressure valve 5 is communicated with an oil way of the metering fuel outlet to form an oil discharging process, 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 an oil return tank, and the stable control of the pressure difference of the inlet and the outlet of the metering valve is completed.
In the aircraft cruising state, the fuel control system has the following working states: the gear pump 6 has a medium and high rotation speed, and the displacement opening of the metering valve 4 is smaller. At this time, a large amount of fuel returns to the system oil tank through the oil return valve 3, and is circulated and used as an oil source to be provided for the gear pump 6 again, so that the temperature in front of the gear pump 6 is increased, and the working performance of the gear pump is affected. Since a large amount of fuel is not 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 invention aims to: the fuel oil regulating system for carrying out open-loop control on fuel oil supply of the combined pump through the electromagnetic valve can meet the use requirement of switching fuel oil in the state of the combined pump; the problems that when the fuel control system is in a small flow state, the mechanical power of a single gear pump is lost, and the existing adjusting control device cannot be used in the combined pump oil supply system are solved.
The technical scheme is as follows: an open-loop regulation control device for switching oil supply of a combined pump is provided, and 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 switching 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 an 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 switching 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 starts, the pump switching solenoid valve is energized: the outlet of the pump switching electromagnetic valve is oil return, 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 is sent to the right cavity of the oil return valve and the upper cavity of the pump switching valve 10 through the switching valve 13; the oil return valve moves leftwards to cut off the communication between the high-pressure oil at the outlet of the second gear pump 9 and the oil return; the pump switching valve 10 moves downwards, high-pressure oil is discharged from the first gear pump 8, and high-pressure oil is discharged from the second gear pump 9 and is sent to the fuel regulator through the pump switching valve 10;
when the engine is in a cruising state and 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 is sent to the left cavity of the oil return valve and the lower cavity of the pump switching valve 10 through the switching valve 13; the oil return valve moves rightwards so as 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, the high-pressure oil at the outlet of the first gear pump 8 is sent to the fuel regulator through the pump switching valve 10, 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 switching valve 13 and the lower chamber of the pump switching valve 10 for buffering the oil pressure during the switching process of the pump switching valve 10.
Further, a bidirectional restrictor 15 is communicated between the switching 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; the outlet return oil of the centrifugal pump 16 is respectively communicated with the inlets of the first gear pump 8 and the second gear pump 9 for primary pressurization.
Further, a check valve 17 is communicated between the second gear pump 9 and the pump switching valve 10, and is used for preventing 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 bushes.
The invention has the technical effects that: according to the invention, the oil separation function of the imported 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 fuel regulator can select high-pressure oil under the condition of different flow requirements; in addition, the 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 liquid can be reduced; adopt two-way choke ware, can cushion fluid, improve valve life, ensure device work safety.
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 switching oil supply of a combined pump according to the present invention.
Detailed Description
In this embodiment, an open-loop regulation control device for switching the oil supply 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 switching valve 13 and a pump switching electromagnetic valve 14.
Wherein the first gear pump 8, the pump switching valve 10 and the constant pressure valve 11 are sequentially communicated; 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 an 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 switching 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 is communicated with the constant pressure valve 11 and the switching valve 13.
The pump switching valve 10 and the bushing form 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 in return oil communication with the inlet of the centrifugal pump.
The oil control process of this embodiment is: when the engine starts, the pump switching solenoid valve is energized: the outlet of the pump switching electromagnetic valve is oil return, 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 is sent to the right cavity of the oil return valve and the upper cavity of the pump switching valve 10 through the switching valve 13; the oil return valve moves leftwards to cut off the communication between the high-pressure oil at the outlet of the second gear pump 9 and the oil return; the pump switching valve 10 moves downwards, high-pressure oil is discharged from the first gear pump 8, and high-pressure oil is discharged from the second gear pump 9 and is sent to the fuel regulator through the pump switching valve 10.
When the engine is in a cruising state and 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 is sent to the left cavity of the oil return valve and the lower cavity of the pump switching valve 10 through the switching valve 13; the oil return valve moves rightwards so as 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, the high-pressure oil at the outlet of the first gear pump 8 is sent to the fuel regulator through the pump switching valve 10, 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 switching valve 13 and the lower cavity of the pump switching valve 10, and is used for buffering the oil pressure during the switching process of the pump switching valve 10. A two-way restrictor 15 is communicated between the switching 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 one-way valve 17 is communicated between the second gear pump 9 and the pump switching valve 10 and is used for preventing high-pressure oil at the pump switching valve 10 from flowing to the second gear pump 9 and the oil return valve.
Furthermore, the first gear pump 8, the second gear pump 9, and the centrifugal pump 16 constitute a combined pump; the outlet return oil of the centrifugal pump 16 is respectively communicated with the inlets of the first gear pump 8 and the second gear pump 9 for primary pressurization.
According to the embodiment, the pressure at the two ends of the switching valve is controlled 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 valve is moved, and the oil distribution switching function of the combined pump is realized.
The technical effect of this embodiment is: 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, and the oil return valve is closed, so that the oil supply state of the double pumps is realized, and the fuel oil is sufficient in the starting process. After the engine is started, when the oil demand of the engine is smaller, 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 is used for connecting the fuel oil at the outlet of the second gear pump with the inlet, the pressure behind 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 quantity of the second gear pump cannot meet the demand, the pump switching electromagnetic valve is electrified, the pump switching valve is in a state of simultaneously supplying oil to two pumps, 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 the 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 switching electromagnetic valve of the given pump of the electronic controller, so as to reduce the heat energy consumption of the fuel control system.
Specifically, taking an engine operation as an example, specific product performance requirements that can be achieved in this 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 regulation control device for switching oil supply of a combined 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 switching 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. The open-loop regulation control device according to claim 1, characterized in that a bidirectional restrictor (15) is connected between the switching valve (13) and the lower chamber of the pump switching valve (10) for buffering the hydraulic pressure during switching of the pump switching valve (10).
3. The open-loop regulation control device according to claim 1, characterized in that a bidirectional restrictor (15) is connected between the switching valve (13) and the left chamber of the return valve for buffering the oil pressure during switching of the return valve.
4. The open-loop regulation control device 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; the outlet return oil of the centrifugal pump (16) is respectively communicated with the inlets of the first gear pump (8) and the second gear pump (9) for primary pressurization.
5. The open-loop regulation control device according to claim 1, characterized in that a one-way 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. The open-loop regulation control device 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. The open-loop regulation control device according to claim 1, characterized in that the outlet flow of the first gear pump (8) is within 5000 kg/h.
8. The open-loop regulation control device according to claim 1, wherein 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 |
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| CN114033590A CN114033590A (en) | 2022-02-11 |
| CN114033590B true 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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| CN114033590A (en) | 2022-02-11 |
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