CN114458501A - Pressure fluctuation absorbing device of spring piston-double throttle plate - Google Patents
Pressure fluctuation absorbing device of spring piston-double throttle plate Download PDFInfo
- Publication number
- CN114458501A CN114458501A CN202210170208.2A CN202210170208A CN114458501A CN 114458501 A CN114458501 A CN 114458501A CN 202210170208 A CN202210170208 A CN 202210170208A CN 114458501 A CN114458501 A CN 114458501A
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- CN
- China
- Prior art keywords
- orifice plate
- throttling
- sleeve
- spring piston
- oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
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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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/008—Arrangement of fuel passages inside of injectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
- F16L55/027—Throttle passages
- F16L55/02709—Throttle passages in the form of perforated plates
- F16L55/02718—Throttle passages in the form of perforated plates placed transversely
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/04—Devices damping pulsations or vibrations in fluids
- F16L55/045—Devices damping pulsations or vibrations in fluids specially adapted to prevent or minimise the effects of water hammer
- F16L55/05—Buffers therefor
Abstract
The invention aims to provide a pressure fluctuation absorption device of a spring piston-double throttling plate, which comprises a sleeve, an oil inlet joint, an oil outlet joint, a first throttling orifice plate and a second throttling orifice plate, wherein two ends of the sleeve are respectively connected with the first throttling orifice plate and the second throttling orifice plate, the oil inlet joint is connected with the sleeve through a first orifice plate insert, the first orifice plate insert is positioned outside the first throttling orifice plate, the oil outlet joint is connected with the sleeve through a second orifice plate insert, the second orifice plate insert is positioned outside the second throttling orifice plate, a first throttling orifice is arranged on the first throttling orifice plate, and a second throttling orifice is arranged on the second throttling orifice plate. The invention realizes the absorption of the fuel pressure fluctuation in the fuel injection system by utilizing the damping action of the throttling holes on the first throttling orifice plate and the second throttling orifice plate and the buffering action of the spring piston, and ensures the stability and the reliability of the fuel injection.
Description
Technical Field
The invention relates to a diesel engine, in particular to an electric control fuel injection system of the diesel engine.
Background
The fuel injection system with electronic control can realize flexible and flexible fuel injection characteristics according to the specific working conditions of the diesel engine, so that the modern diesel engine is provided with the fuel injection system with electronic control. During the fuel injection process of the fuel injection system, pressure fluctuation can be generated in the high-pressure fuel system due to intermittent high-frequency fuel injection, the pressure fluctuation is different along with different working conditions, and the pressure fluctuation can be caused to have larger amplitude and frequency under the conditions of quick fuel injection and fuel cut-off. The fluctuation of the fuel pressure directly influences the inconsistency of the circulating fuel injection quantity and the fuel injection rule of a fuel system under multi-circulation, so that the fuel consumption and the emission of a diesel engine with the engine are increased, and the diesel engine cannot work normally under severe conditions. Therefore, the stabilization of the injection pressure in the injection process is a technical problem to be solved urgently by the modern electrically controlled fuel system.
Disclosure of Invention
The invention aims to provide a pressure fluctuation absorbing device of a spring piston-double throttle plate, which can realize the multiple absorption of fuel pressure fluctuation in a fuel system, thereby reducing the influence of the pressure fluctuation on the injection performance and improving the oil injection stability of the fuel injection system.
The purpose of the invention is realized as follows:
the invention relates to a pressure fluctuation absorbing device of a spring piston-double throttle plate, which is characterized in that: the oil inlet joint comprises a sleeve, the oil inlet connects, the joint that produces oil, first orifice plate, the second orifice plate, first orifice plate and second orifice plate are connected respectively to telescopic both ends, it links to each other through first orifice plate insert between oil inlet joint and the sleeve, first orifice plate insert is located first orifice plate outside, it links to each other through second orifice plate insert between joint and the sleeve to produce oil, second orifice plate insert is located second orifice plate outside, set up first orifice on the first orifice plate, set up the second orifice on the second orifice plate.
The present invention may further comprise:
1. a spring piston is arranged in a sleeve on one side of the first throttling orifice plate, a gasket is arranged in a sleeve on one side of the second throttling orifice plate, and a return spring is arranged between the spring piston and the gasket.
2. An oil inlet is formed in the oil inlet joint, an oil inlet buffer cavity is formed among the oil inlet joint, the first throttling orifice plate and the first orifice plate insert, an oil outlet is formed in the oil outlet joint, and an oil outlet buffer cavity is formed among the oil outlet joint, the second throttling orifice plate and the second orifice plate insert.
3. A first variable accommodating cavity of the sleeve is formed among the sleeve, the first throttling orifice plate and the spring piston, a sleeve outlet buffer cavity is formed among the sleeve, the second throttling orifice plate and the gasket, a second variable accommodating cavity of the sleeve is formed among the sleeve, the spring piston and the gasket, a piston oil passage is arranged on the spring piston, and a gasket oil passage is arranged on the gasket.
4. The first throttling hole arrangement area on the first throttling hole plate is divided into four fan-shaped areas with the same size, the diameters of the first throttling holes at the intersection of the fan-shaped areas are the same, and the size is the average value of the diameters of the throttling holes in the two adjacent fan-shaped areas.
5. The diameters of the first throttling holes in the same area on the first throttling hole plate are equal, the diameters of the first throttling holes in the adjacent areas are different, the size ratio is 1:2, and the diameters of the first throttling holes in the separated areas are equal.
6. When fuel oil flows through the first throttling holes which are arranged in a non-equal-diameter partition mode on the first throttling hole plate, the first absorption of fuel oil pressure fluctuation is achieved through the damping effect of the first throttling holes, when the fuel oil flows into the second variable accommodating cavity of the sleeve, the second absorption of the pressure fluctuation is achieved through the buffering of the spring piston, and when the fuel oil flows through the second throttling holes which are arranged in an equal-diameter staggered mode on the second throttling hole plate, the third absorption of the fuel oil pressure is achieved through the damping effect of the second throttling holes.
The invention has the advantages that: according to the invention, the first throttle orifice plate, the spring piston and the second throttle orifice plate are sequentially arranged in series, when fuel oil flows through the first throttle orifice which is arranged on the first throttle orifice plate in a non-equal-diameter subarea manner, the first absorption of fuel oil pressure fluctuation is realized through the damping effect of the first throttle orifice, when the fuel oil flows into the second variable accommodating cavity of the sleeve, the second absorption of the pressure fluctuation is realized through the buffering of the spring piston, when the fuel oil flows through the second throttle orifice which is arranged on the second throttle orifice plate in an equal-diameter staggered manner, the third absorption of the fuel oil pressure is realized through the damping effect of the second throttle orifice, and finally, the pressure fluctuation of the fuel oil injection system is remarkably reduced in the oil injection process, and the stability and consistency of the oil injection of the electronic control fuel oil system are improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the working principle of the present invention;
FIG. 3 is a schematic view of a first orifice plate structure;
FIG. 4 is a schematic view of a second orifice plate structure.
Detailed Description
The invention will now be described in more detail by way of example with reference to the accompanying drawings in which:
with reference to fig. 1, fig. 1 is a schematic diagram of an overall structure of the present invention, and includes an oil inlet joint 1, a first orifice plate connecting piece 2, a sleeve 5, a second orifice plate connecting piece 9, an oil outlet joint 10, a second orifice plate 8, a gasket 7, a return spring 6, a spring piston 4, and a first orifice plate 3. An oil inlet 21 is arranged in the oil inlet connector 1, the first orifice plate connecting piece 2, the first orifice plate 3 and the oil inlet connector 1 form an oil inlet buffer cavity 20, a plurality of first orifices 19 are arranged in the first orifice plate 3, the sleeve 5, the spring piston 4 and the first orifice plate 3 form a sleeve first variable containing cavity 18, a piston oil duct 17 is arranged in the spring piston 4, a gasket oil duct 15 is arranged in the gasket 7, the sleeve 5, the gasket 7 and the spring piston 4 form a sleeve second variable containing cavity 16, the sleeve 5, the second orifice plate 8 and the gasket 7 form a sleeve outlet buffer cavity 14, a plurality of second orifices 13 are arranged in the second orifice plate 8, an oil outlet buffer cavity 12 is formed by the second orifice plate connecting piece 9, the second orifice plate 8 and the oil outlet connector 10, and an oil outlet 11 is arranged in the oil outlet connector 10.
The first throttling hole arrangement area on the first throttling hole plate is divided into four fan-shaped areas with equal size, the diameter of the first throttling hole at the intersection of the areas is equal, and the size is the average value of the diameters of the throttling holes in the two adjacent areas.
The diameters of the first throttle holes in the same region on the first throttle hole plate are equal, the diameters of the first throttle holes in adjacent regions are different, the size ratio is 1:2, and the diameters of the first throttle holes in the separated regions are equal.
With reference to fig. 1 to 4, the working principle of the present invention is as follows: high-pressure fuel oil with pressure fluctuation flows into an oil inlet buffer cavity 20 through an oil inlet 21 in an oil inlet joint 1, when the fuel oil positioned in the oil inlet buffer cavity 20 flows into a sleeve first variable accommodating cavity 18 through a first throttling hole 19 of a throttling orifice plate 3, the first efficient absorption of the fuel oil pressure fluctuation is realized under the damping action of the first throttling hole which is arranged in a non-equal-diameter partition way and the capacity resisting action of the sleeve first variable accommodating cavity 18, when the fuel oil flowing into the sleeve first variable accommodating cavity 18 flows into a sleeve second variable accommodating cavity 16 through a piston oil passage 17 of a spring piston 4, the reabsorption of the fuel oil pressure fluctuation is realized under the buffering action of the spring piston 4, when the fuel oil positioned in the sleeve second variable accommodating cavity 16 flows into a second throttling hole 13 of a second throttling orifice plate 8 through a gasket oil passage 15 of a gasket 7 and a sleeve outlet buffer cavity 14, under the damping action of the second throttling hole 13, and the pressure fluctuation is absorbed for the third time, and the fuel oil which completes the process of absorbing the pressure fluctuation for multiple times flows into the outlet buffer cavity 12 from the second throttling hole 13 and flows out through the oil outlet in the oil outlet joint 10.
Claims (7)
1. A pressure fluctuation absorbing device of a spring piston-double throttle plate is characterized in that: the oil inlet joint comprises a sleeve, the oil inlet connects, the joint that produces oil, first orifice plate, the second orifice plate, first orifice plate and second orifice plate are connected respectively to telescopic both ends, it links to each other through first orifice plate insert between oil inlet joint and the sleeve, first orifice plate insert is located first orifice plate outside, it links to each other through second orifice plate insert between joint and the sleeve to produce oil, second orifice plate insert is located second orifice plate outside, set up first orifice on the first orifice plate, set up the second orifice on the second orifice plate.
2. The pressure fluctuation absorbing apparatus of a spring piston-dual throttle plate as set forth in claim 1, wherein: a spring piston is arranged in a sleeve on one side of the first throttling orifice plate, a gasket is arranged in a sleeve on one side of the second throttling orifice plate, and a return spring is arranged between the spring piston and the gasket.
3. The pressure fluctuation absorbing apparatus of a spring piston-dual throttle plate as set forth in claim 2, wherein: an oil inlet is formed in the oil inlet joint, an oil inlet buffer cavity is formed among the oil inlet joint, the first throttling orifice plate and the first orifice plate insert, an oil outlet is formed in the oil outlet joint, and an oil outlet buffer cavity is formed among the oil outlet joint, the second throttling orifice plate and the second orifice plate insert.
4. The pressure fluctuation absorbing apparatus of a spring piston-double throttle plate as set forth in claim 2, wherein: a first variable accommodating cavity of the sleeve is formed among the sleeve, the first throttling orifice plate and the spring piston, a sleeve outlet buffer cavity is formed among the sleeve, the second throttling orifice plate and the gasket, a second variable accommodating cavity of the sleeve is formed among the sleeve, the spring piston and the gasket, a piston oil passage is arranged on the spring piston, and a gasket oil passage is arranged on the gasket.
5. The pressure fluctuation absorbing apparatus of a spring piston-dual throttle plate as set forth in claim 2, wherein: the first throttling hole arrangement area on the first throttling hole plate is divided into four fan-shaped areas with the same size, the diameters of the first throttling holes at the intersection of the fan-shaped areas are the same, and the size is the average value of the diameters of the throttling holes in the two adjacent fan-shaped areas.
6. The pressure fluctuation absorbing apparatus of a spring piston-dual throttle plate as set forth in claim 5, wherein: the diameters of the first throttling holes in the same area on the first throttling hole plate are equal, the diameters of the first throttling holes in the adjacent areas are different, the size ratio is 1:2, and the diameters of the first throttling holes in the separated areas are equal.
7. The pressure fluctuation absorbing apparatus of a spring piston-dual throttle plate as set forth in claim 2, wherein: when fuel oil flows through the first throttling holes which are arranged in a non-equal-diameter partition mode on the first throttling hole plate, the first absorption of fuel oil pressure fluctuation is achieved through the damping effect of the first throttling holes, when the fuel oil flows into the second variable accommodating cavity of the sleeve, the second absorption of the pressure fluctuation is achieved through the buffering of the spring piston, and when the fuel oil flows through the second throttling holes which are arranged in an equal-diameter staggered mode on the second throttling hole plate, the third absorption of the fuel oil pressure is achieved through the damping effect of the second throttling holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210170208.2A CN114458501A (en) | 2022-02-24 | 2022-02-24 | Pressure fluctuation absorbing device of spring piston-double throttle plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210170208.2A CN114458501A (en) | 2022-02-24 | 2022-02-24 | Pressure fluctuation absorbing device of spring piston-double throttle plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114458501A true CN114458501A (en) | 2022-05-10 |
Family
ID=81415183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210170208.2A Pending CN114458501A (en) | 2022-02-24 | 2022-02-24 | Pressure fluctuation absorbing device of spring piston-double throttle plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114458501A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115013624A (en) * | 2022-05-31 | 2022-09-06 | 中国船舶重工集团公司第七一九研究所 | Pressure reducing device |
| CN116006367A (en) * | 2023-03-24 | 2023-04-25 | 哈尔滨工程大学 | Electric control fuel injector for realizing high-precision fuel injection based on double electromagnetic valve control |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63210401A (en) * | 1987-02-23 | 1988-09-01 | Toyota Motor Corp | Accumulator |
| JPH08261098A (en) * | 1995-03-24 | 1996-10-08 | Toyoda Gosei Co Ltd | Fuel pressure pulsation damper |
| US5743298A (en) * | 1996-04-22 | 1998-04-28 | Techniflo Corporation | Spring pulsation dampener |
| JPH10311267A (en) * | 1997-05-12 | 1998-11-24 | Denso Corp | Fuel pressure pulsation damping device |
| CN1229174A (en) * | 1998-03-13 | 1999-09-22 | 法国天然气公司 | Flow conditioner for gas transport pipe |
| JP2007009840A (en) * | 2005-07-01 | 2007-01-18 | Denso Corp | Regulator valve |
| US20070289642A1 (en) * | 2004-11-09 | 2007-12-20 | Masco Corporation Of Indiana | Device for dynamic control of a water flow |
-
2022
- 2022-02-24 CN CN202210170208.2A patent/CN114458501A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63210401A (en) * | 1987-02-23 | 1988-09-01 | Toyota Motor Corp | Accumulator |
| JPH08261098A (en) * | 1995-03-24 | 1996-10-08 | Toyoda Gosei Co Ltd | Fuel pressure pulsation damper |
| US5743298A (en) * | 1996-04-22 | 1998-04-28 | Techniflo Corporation | Spring pulsation dampener |
| JPH10311267A (en) * | 1997-05-12 | 1998-11-24 | Denso Corp | Fuel pressure pulsation damping device |
| CN1229174A (en) * | 1998-03-13 | 1999-09-22 | 法国天然气公司 | Flow conditioner for gas transport pipe |
| US20070289642A1 (en) * | 2004-11-09 | 2007-12-20 | Masco Corporation Of Indiana | Device for dynamic control of a water flow |
| JP2007009840A (en) * | 2005-07-01 | 2007-01-18 | Denso Corp | Regulator valve |
Non-Patent Citations (1)
| Title |
|---|
| 宋力刚，等: "《安全生产监管全书 3》", 31 May 2002, 北京：中国大地出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115013624A (en) * | 2022-05-31 | 2022-09-06 | 中国船舶重工集团公司第七一九研究所 | Pressure reducing device |
| CN115013624B (en) * | 2022-05-31 | 2023-09-08 | 中国船舶重工集团公司第七一九研究所 | Pressure reducing device |
| CN116006367A (en) * | 2023-03-24 | 2023-04-25 | 哈尔滨工程大学 | Electric control fuel injector for realizing high-precision fuel injection based on double electromagnetic valve control |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20220510 |
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| WD01 | Invention patent application deemed withdrawn after publication |