CN114458500A - Multi-stage resistance-capacitance type pressure fluctuation suppression device - Google Patents
Multi-stage resistance-capacitance type pressure fluctuation suppression device Download PDFInfo
- Publication number
- CN114458500A CN114458500A CN202210170209.7A CN202210170209A CN114458500A CN 114458500 A CN114458500 A CN 114458500A CN 202210170209 A CN202210170209 A CN 202210170209A CN 114458500 A CN114458500 A CN 114458500A
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- Prior art keywords
- throttling
- capacitance
- piston
- resistance
- pressure fluctuation
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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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
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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
- 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 multi-stage resistance-capacitance type pressure fluctuation suppression device which comprises a piston sleeve, an oil inlet joint and an oil outlet joint, wherein the piston sleeve is arranged between the oil inlet joint and the oil outlet joint, a throttling orifice plate is arranged between the oil inlet joint and the piston sleeve, a spring gasket is arranged between the oil outlet joint and the piston sleeve, a resistance-capacitance throttling piston is arranged in the piston sleeve, and a throttling orifice is arranged on the throttling orifice plate. According to the invention, the resistance-capacitance throttling piston and the throttling orifice plate are connected in series, so that the fuel pressure fluctuation is absorbed, and the stability of the high-pressure common rail fuel injection system is improved.
Description
Technical Field
The invention relates to a diesel engine, in particular to a high-pressure common rail system of the diesel engine.
Background
With the stricter and stricter requirements of emission regulations, the economic efficiency and the emission performance of diesel engines are also required to be higher and higher in various countries. The high-pressure common rail fuel injection has the advantages of fuel injection pressure, circulating fuel injection quantity, flexible adjustment of fuel injection time and the like, is widely applied to modern diesel engines, and is one of core systems for realizing energy conservation and emission reduction of the diesel engines. In the fuel injection process of the common rail fuel injection system, the fuel pressure in the common rail pipe can generate pressure fluctuation under the action of discontinuous fuel pumping and fuel injection, and the pressure fluctuation directly causes the instability of the fuel injection pressure of the common rail fuel injector, so that the stability of the circulating fuel injection quantity of the common rail system under a multi-circulating fuel injection strategy is poor, the working characteristics of a high-pressure common rail system are deteriorated, and the fuel consumption and the emission of a diesel engine are increased. Therefore, how to reduce the pressure fluctuation during the fuel injection process is a difficult problem in the development of the high-pressure common rail system.
Disclosure of Invention
The invention aims to provide a multi-stage resistance-capacitance type pressure fluctuation suppression device which can realize the repeated absorption of pressure fluctuation of a high-pressure common rail system, effectively reduce the pressure fluctuation in the oil injection process of the common rail system and improve the oil injection stability of the common rail system.
The purpose of the invention is realized as follows:
the invention discloses a multistage resistance-capacitance type pressure fluctuation suppression device, which is characterized in that: the oil outlet joint comprises a piston sleeve, an oil inlet joint and an oil outlet joint, wherein the piston sleeve is arranged between the oil inlet joint and the oil outlet joint, a throttling orifice plate is arranged between the oil inlet joint and the piston sleeve, a spring gasket is arranged between the oil outlet joint and the piston sleeve, a resistance-capacitance throttling piston is arranged in the piston sleeve, and a throttling orifice is arranged on the throttling orifice plate.
The present invention may further comprise:
1. a first variable containing cavity is formed among the resistance-capacitance throttling piston, the throttling orifice plate and the piston sleeve, a second variable containing cavity is formed among the resistance-capacitance throttling piston, the spring gasket and the piston sleeve, and a reset spring is installed between the resistance-capacitance throttling piston and the spring gasket.
2. A piston groove containing cavity is formed between the middle part of the resistance-capacitance throttling piston and the piston sleeve, a first throttling hole is formed in the resistance-capacitance throttling piston on the right side of the piston groove containing cavity, and a second throttling hole is formed in the resistance-capacitance throttling piston on the left side of the piston groove containing cavity.
3. The diameter of the throttling hole of the throttling orifice plate is reduced along the direction of the circle center, the diameter ratio of two adjacent throttling holes along the diameter direction is equal, and the proportionality coefficient is 1.2.
4. The first orifice diameter of the resistance-capacitance throttling piston is larger than the largest orifice diameter on the orifice plate.
5. The diameter of the second orifice of the resistance-capacitance throttling piston is larger than that of the first orifice.
6. When fuel oil flows through a throttling hole in a throttling hole plate and a first variable containing cavity to form a primary resistance-capacitance oil way, primary absorption of pressure fluctuation of the fuel oil is completed under the damping action of the throttling hole plate and the capacitance-reactance action of the first variable containing cavity, when the fuel oil flows through a secondary resistance-capacitance oil way formed by the first throttling hole and a piston groove containing cavity, secondary absorption of the pressure fluctuation is realized under the damping action of the first throttling hole and the capacitance-reactance action of the piston groove containing cavity, and when the fuel oil flows through a tertiary resistance-capacitance oil way formed by a second throttling hole and a second variable containing cavity, tertiary absorption of the pressure fluctuation is realized under the damping action of the second throttling hole and the capacitance-reactance action of the second variable containing cavity.
The invention has the advantages that: according to the invention, through the series connection of the primary resistance-capacitance oil circuit, the secondary resistance-capacitance oil circuit and the tertiary resistance-capacitance oil circuit, when fuel oil flows through the primary resistance-capacitance oil circuit, the first absorption of pressure fluctuation of the fuel oil is completed under the damping action of the throttling hole plate and the capacitance resistance action of the first variable cavity, when the fuel oil flows through the secondary resistance-capacitance oil circuit, the second absorption of the pressure fluctuation is realized under the damping action of the first throttling hole and the capacitance resistance action of the piston groove cavity, when the fuel oil flows through the tertiary resistance-capacitance oil circuit, the third absorption of the pressure fluctuation is realized under the damping action of the second throttling hole and the capacitance resistance action of the second variable cavity, and through the multi-stage buffer inhibition of the pressure fluctuation, the fuel oil of a high-pressure common rail system is effectively reduced, and the stability of oil injection of a fuel injection system is 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 diagram of a configuration of an orifice plate;
FIG. 4 is a schematic diagram of the right side structure of the resistance-capacitance throttling piston;
fig. 5 is a schematic diagram of the left side structure of the resistance-capacitance throttling piston.
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. 1-5, fig. 1 is a schematic diagram of an overall structure of the present invention, and includes an oil inlet joint 1, a throttle orifice plate 7, a resistance-capacitance throttle piston 6, a return spring 4, a spring gasket 2, an oil outlet joint 3, and a piston sleeve 5, where the throttle orifice plate 7 is compressed between the oil inlet joint 1 and the piston sleeve 5. The spring gasket 2 is tightly pressed between the piston sleeve 5 and the oil outlet joint 3, the oil inlet joint 1, the orifice plate 7, the piston sleeve 5 and the oil outlet joint 3 are sequentially connected and sealed through threads, an oil inlet joint oil inlet channel 8 and an oil inlet joint oil outlet channel 9 are formed in the oil inlet joint 1, a plurality of orifices 10 are formed in the orifice plate 7, a first orifice 12 and a second orifice 14 are respectively formed in the head and the tail of the resistance-capacitance throttling piston 6, the first variable accommodating cavity 11 is formed by the orifice plate 7, the resistance-capacitance throttling piston 6 and the piston sleeve 5, the piston groove accommodating cavity 13 is formed by the resistance-capacitance throttling piston 6 and the piston sleeve 5, and the second variable accommodating cavity 15 is formed by the spring gasket 2, the piston sleeve 5 and the resistance-capacitance throttling piston 6.
The diameter of the throttling hole plate is smaller as the throttling hole is closer to the circle center of the throttling hole plate, the diameter ratio of two adjacent throttling holes in the diameter direction is equal, and the proportionality coefficient is 1.2. The diameter of the first throttle hole of the resistance-capacitance throttling piston is larger than the diameter of the largest throttle hole on the throttle orifice plate. The diameter of the second orifice of the resistance-capacitance throttling piston is larger than that of the first orifice.
With reference to fig. 1 to 5, the working principle of the present invention is as follows: fluctuating fuel oil flows into the throttling hole 10 through the oil inlet joint oil inlet channel 8 and the oil inlet joint oil outlet channel 9, first pressure wave absorption is started under the damping action of the throttling hole 10, and after the fuel oil flows out of the throttling hole 10 and enters the first variable cavity 11, first pressure wave absorption is achieved, and the process is first-stage resistance-capacitance fluctuation suppression of the multi-stage resistance-capacitance type pressure fluctuation suppression device. Under the action of the oil pressure in the first variable accommodating cavity 11, the resistance-capacitance throttling piston 6 starts to move, meanwhile, the fuel oil in the first variable accommodating cavity 11 flows into the first throttle hole 12, the second pressure wave is absorbed under the damping action of the first throttle hole 12, and after the fuel oil flows into the piston groove accommodating cavity 13 from the first throttle hole 12, the second pressure wave absorption is realized, and the process is the second-stage resistance-capacitance fluctuation suppression of the multi-stage resistance-capacitance type pressure fluctuation suppression device. The fuel oil in the piston groove accommodating cavity 13 flows into the second throttle hole 14, the absorption of the third pressure wave is started under the damping action of the second throttle hole 14, and after the fuel oil flows into the second variable accommodating cavity 15 from the second throttle hole 14, the absorption of the third pressure wave is realized, and the process is the third-stage resistance-capacitance fluctuation suppression of the multi-stage resistance-capacitance pressure fluctuation suppression device. Finally, the fuel flows out of the oil outlet joint oil outlet passage 18 through the gasket oil passage 16 and the oil outlet joint oil inlet passage 17, and multi-stage suppression of fuel pressure fluctuation is achieved.
Claims (7)
1. The multistage resistance-capacitance type pressure fluctuation suppression device is characterized in that: the oil outlet joint comprises a piston sleeve, an oil inlet joint and an oil outlet joint, wherein the piston sleeve is arranged between the oil inlet joint and the oil outlet joint, a throttling orifice plate is arranged between the oil inlet joint and the piston sleeve, a spring gasket is arranged between the oil outlet joint and the piston sleeve, a resistance-capacitance throttling piston is arranged in the piston sleeve, and a throttling orifice is arranged on the throttling orifice plate.
2. The multi-stage resistive-capacitive pressure fluctuation suppression apparatus according to claim 1, wherein: a first variable containing cavity is formed among the resistance-capacitance throttling piston, the throttling orifice plate and the piston sleeve, a second variable containing cavity is formed among the resistance-capacitance throttling piston, the spring gasket and the piston sleeve, and a reset spring is installed between the resistance-capacitance throttling piston and the spring gasket.
3. The multi-stage resistive-capacitive pressure fluctuation suppression apparatus according to claim 2, wherein: a piston groove containing cavity is formed between the middle part of the resistance-capacitance throttling piston and the piston sleeve, a first throttling hole is formed in the resistance-capacitance throttling piston on the right side of the piston groove containing cavity, and a second throttling hole is formed in the resistance-capacitance throttling piston on the left side of the piston groove containing cavity.
4. The multi-stage resistive-capacitive pressure fluctuation suppression apparatus according to claim 1, wherein: the diameter of the throttling hole of the throttling orifice plate is reduced along the direction of the circle center, the diameter ratio of two adjacent throttling holes along the diameter direction is equal, and the proportionality coefficient is 1.2.
5. The multi-stage resistive-capacitive pressure fluctuation suppression apparatus according to claim 3, wherein: the first orifice diameter of the resistance-capacitance throttling piston is larger than the largest orifice diameter on the orifice plate.
6. The multi-stage resistive-capacitive pressure fluctuation suppression apparatus according to claim 3, wherein: the diameter of the second orifice of the resistance-capacitance throttling piston is larger than that of the first orifice.
7. The multi-stage resistive-capacitive pressure fluctuation suppression apparatus according to claim 3, wherein: when fuel oil flows through a throttling hole in a throttling hole plate and a first variable containing cavity to form a primary resistance-capacitance oil way, primary absorption of pressure fluctuation of the fuel oil is completed under the damping action of the throttling hole plate and the capacitance-reactance action of the first variable containing cavity, when the fuel oil flows through a secondary resistance-capacitance oil way formed by the first throttling hole and a piston groove containing cavity, secondary absorption of the pressure fluctuation is realized under the damping action of the first throttling hole and the capacitance-reactance action of the piston groove containing cavity, and when the fuel oil flows through a tertiary resistance-capacitance oil way formed by a second throttling hole and a second variable containing cavity, tertiary absorption of the pressure fluctuation is realized under the damping action of the second throttling hole and the capacitance-reactance action of the second variable containing cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210170209.7A CN114458500A (en) | 2022-02-24 | 2022-02-24 | Multi-stage resistance-capacitance type pressure fluctuation suppression device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210170209.7A CN114458500A (en) | 2022-02-24 | 2022-02-24 | Multi-stage resistance-capacitance type pressure fluctuation suppression device |
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| Publication Number | Publication Date |
|---|---|
| CN114458500A true CN114458500A (en) | 2022-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210170209.7A Pending CN114458500A (en) | 2022-02-24 | 2022-02-24 | Multi-stage resistance-capacitance type pressure fluctuation suppression device |
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| CN (1) | CN114458500A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116006366A (en) * | 2023-03-24 | 2023-04-25 | 哈尔滨工程大学 | Electric control fuel injector capable of realizing stable injection based on self-adaptive adjustment of resistance-capacitance component |
| CN116044630A (en) * | 2023-03-30 | 2023-05-02 | 哈尔滨工程大学 | High-pressure common rail oil sprayer capable of realizing low pressure fluctuation based on multistage spring piston |
| CN116085159A (en) * | 2023-03-31 | 2023-05-09 | 哈尔滨工程大学 | Common rail fuel injector capable of realizing stable injection based on multistage self-pressure regulation dissipation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0650527A (en) * | 1992-07-30 | 1994-02-22 | Mitsubishi Heavy Ind Ltd | Multi-stage pressure reducing device |
| JPH06101794A (en) * | 1992-09-21 | 1994-04-12 | Fuji Electric Co Ltd | Fluid pressure pulsation absorbing device |
| WO2004040120A1 (en) * | 2002-10-18 | 2004-05-13 | Robert Bosch Gmbh | Device for reducing the quantity of liquid suctioned by a feeding pump |
| US20110284104A1 (en) * | 2010-05-24 | 2011-11-24 | Riano Gutierrez Ismael Hernan | Automatic flow regulator valve |
| US20160223118A1 (en) * | 2013-07-31 | 2016-08-04 | Obschestvo S Ogranichennoi Otvetstvennostju "Tekhpromarma" | Self-killing of shock pulses of transferred medium in main pipeline |
-
2022
- 2022-02-24 CN CN202210170209.7A patent/CN114458500A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0650527A (en) * | 1992-07-30 | 1994-02-22 | Mitsubishi Heavy Ind Ltd | Multi-stage pressure reducing device |
| JPH06101794A (en) * | 1992-09-21 | 1994-04-12 | Fuji Electric Co Ltd | Fluid pressure pulsation absorbing device |
| WO2004040120A1 (en) * | 2002-10-18 | 2004-05-13 | Robert Bosch Gmbh | Device for reducing the quantity of liquid suctioned by a feeding pump |
| US20110284104A1 (en) * | 2010-05-24 | 2011-11-24 | Riano Gutierrez Ismael Hernan | Automatic flow regulator valve |
| US20160223118A1 (en) * | 2013-07-31 | 2016-08-04 | Obschestvo S Ogranichennoi Otvetstvennostju "Tekhpromarma" | Self-killing of shock pulses of transferred medium in main pipeline |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116006366A (en) * | 2023-03-24 | 2023-04-25 | 哈尔滨工程大学 | Electric control fuel injector capable of realizing stable injection based on self-adaptive adjustment of resistance-capacitance component |
| CN116044630A (en) * | 2023-03-30 | 2023-05-02 | 哈尔滨工程大学 | High-pressure common rail oil sprayer capable of realizing low pressure fluctuation based on multistage spring piston |
| CN116085159A (en) * | 2023-03-31 | 2023-05-09 | 哈尔滨工程大学 | Common rail fuel injector capable of realizing stable injection based on multistage self-pressure regulation dissipation |
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Application publication date: 20220510 |