CN201517450U - Fuel supplying system of Stirling engine - Google Patents
Fuel supplying system of Stirling engine Download PDFInfo
- Publication number
- CN201517450U CN201517450U CN200920074080XU CN200920074080U CN201517450U CN 201517450 U CN201517450 U CN 201517450U CN 200920074080X U CN200920074080X U CN 200920074080XU CN 200920074080 U CN200920074080 U CN 200920074080U CN 201517450 U CN201517450 U CN 201517450U
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- fuel
- pressure
- flowmeter
- stirling engine
- pump group
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Abstract
The utility model discloses a fuel supplying system of a Stirling engine, which comprises a plunger type high-pressure fuel pump set, a fuel flowmeter, corresponding pipes and valves. The fuel flowmeter is a high-precision mass flowmenter or a positive displacement flowmeter and is arranged between the plunger type high-pressure fuel pump set and the Stirling engine. A fuel pressure pulsation attenuating device which reduces the pressure fluctuation of fuel is provided between the plunger type high-pressure fuel pump set and the fuel flowmeter. The system has the advantages of simple structural principle, high reliability, low cost and convenient use adjustment, remarkably increases the operation reliability of fuel flowmeter, and improves the burning stability of Stirling engine.
Description
Technical field:
The utility model relates to fuel oil supply system, especially relates to the Stirling engine fuel oil supply system.
Background technique:
Stirling engine is a kind of outer combustion-ing engine, fuel oil is firing chamber and oxygen/air mixed combustion externally, with heat transferred inner loop working medium, working medium is according to the Stirling periodic duty, heat energy just is converted into the kinetic energy of reciprocating motion of the pistons, the acting of driving bent axle has realized the conversion of chemical energy → heat energy → mechanical energy.Because Stirling circuit efficient equals the highest cycle efficiency---Carnot Cycle's Efficiency, so heat engine is a kind of high efficiency energy conversion device, recent two decades develops comparatively rapid.
The quality of heat engine burning is to the Performance And Reliability decisive role of motor, and the key factor of decision burning quality is exactly the dynamically accurate proportioning of fuel oil, oxygen/air, therefore will according to automatic control program to fuel oil spray into quality and pressure is accurately measured and is controlled, the measurement of fuel mass flow is its important ring.General fuel oil supply system is made up of high pressure fuel pump group, fuel flowmeter and pipeline valve member and pipe-line system, the high pressure fuel pump group is the plunger type fuel pump group, fuel flowmeter often adopts the high precision flow of tape pulse signal output, general positive displacement or the mass flowmenter of adopting, this system can satisfy fuel oil high-acruracy survey needs, simple in structure, but have the following disadvantages:
1, positive displacement or mass flowmenter are relatively more responsive to the percussion of pressure pulsation, and be strict to the pressure pulsation amplitude control requirement of fuel oil.Because the inherent characteristic of plunger type fuel oil oil pump group, its outlet fuel pressure ripple amplitude is bigger, easily flowmeter is formed the high-frequency percussion effect, influences the reliability of flowmeter work.
2, the dither of fuel pressure can exert an influence to combustion performance, usually the pressure of firing chamber is to keep constant, if it is excessive to spray into the fuel pressure ripple amplitude of firing chamber, will cause oil spout backward and forward constantly, pressure is suddenly big or suddenly small, cause fuel injection quantity inhomogeneous, uniformity, stability to burning will affect, according to preliminary surveying, if not carrying out attenuate pulsations, do not handle the fuel oil behind the plunger pump, ripple amplitude may be well imagined the influence of burning up to 20%～30% of mean value.
Summary of the invention:
The purpose of this utility model is to provide a kind of Stirling engine fuel oil supply system, and it is excessive to solve the pulsation of present oil-fired system charge oil pressure, easily causes fuel flowmeter to damage, and causes inhomogeneous, the problem of unstable of burning simultaneously.
The technological scheme that its technical problem that solves the utility model adopts is:
A kind of Stirling engine fuel oil supply system, comprise that plunger type high-pressure fuel pump group, fuel flow take into account corresponding pipeline and valve member, described fuel flow is counted highi degree of accuracy mass flowmenter or positive displacement flowmeter, be arranged between plunger type high-pressure fuel pump group and the Stirling engine, between described plunger type high-pressure fuel pump group and fuel flowmeter, arranged a fuel pressure attenuate pulsations device that reduces the fuel pressure fluctuation.
Above-mentioned Stirling engine fuel oil supply system, fuel pressure attenuate pulsations Unit Installation position respectively with plunger type high-pressure fuel pump group, fuel flowmeter fuel pipe external diameter at a distance of 5～10 times.
Above-mentioned Stirling engine fuel oil supply system, described fuel pressure attenuate pulsations device is the bag type accumulator structure, the volume of bag type accumulator is 5～10 times of fuel pump group per second volume flowrate.
Above-mentioned Stirling engine fuel oil supply system, described fuel pressure attenuate pulsations device also disposes bag type accumulator inflator and pressure monitoring device.
The beneficial effects of the utility model are:
1, by after the high pressure fuel pump group, before the fuel flowmeter, increased a fuel pressure attenuate pulsations device, pulsation decays to fuel pressure, has solved the integrity problem that influences flowmeter, and has improved the stability of burning.This system architecture principle is simple, the reliability height.
2, fuel pressure attenuate pulsations device adopts bladder structure commonly used, the reliability height, and cost is low, uses easy to adjust.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a structure principle chart of the present utility model.
Embodiment
As shown in Figure 1, fuel oil supply system of the present utility model is made up of high pressure fuel pump group 1, fuel pressure attenuate pulsations device 2, fuel flowmeter 3 etc. successively, fuel oil is after 1 supercharging of high pressure fuel pump group, the fuel pressure attenuate pulsations of flowing through successively device 2, fuel flowmeter 3 spray into Stirling engine 4 and oxygen/air mixed combustion.
High pressure fuel pump group 1 is the plunger type fuel pump assembly, comprise plunger type fuel pump and fuel-flow control device, plunger type high-pressure fuel pump 1 can be promoted to the fuel pressure behind the oil pump a few MPa to tens MPas and not wait, the fuel-flow control device can be controlled fuel flow by the rack displacement of control plunger pump, because outer combustion-ing engine needs different fuel flows at different power gears, and in order to guarantee that fuel oil can overcome the resistance of oil head, guarantee atomizing effect preferably, need the fuel oil behind the fuel pump to have higher pressure, thereby to adopt this structure be suitable.
Since the working principle of plunger type fuel pump be the different plunger of a plurality of phase places alternately acting improve fuel pressure, thereby can there be certain pulsation in the fuel pressure behind the fuel pump, the quantity of ripple frequency and plunger is relevant with the rotating speed of oil pump, in general frequency reaches tens hertz even hundreds of hertz all than higher.Dither can influence the reliability of fuel flowmeter, there is bigger harm in long-time running to motor in addition, at first the pulsation of the fuel pressure fuel pressure and the quality that can cause spraying into the firing chamber pulsed, and produces deviation with the theory setting value, the uniformity and the stability of influence burning.The chief component of fuel pressure pulsation dampening is a bladder type hydropneumatic accumulator, and the attenuation performance of fuel pressure pulsation dampening is relevant with the volume of utricule relevant with the filled media pressure and other parameters, can be by calculating and the definite best parameter of test.
Through seal in a fuel pressure attenuate pulsations device 2 in high pressure fuel pump group 1 and fuel flowmeter 3, pulsation decays to the fuel pressure after the high pressure fuel pump group 1, with the reliability that guarantees fuel flowmeter 3, the stability of burning.
Fuel pressure attenuate pulsations device 2 is bag type accumulator device commonly used, promptly a leather bag has been installed, has been charged into the gas of certain pressure in the leather bag, be generally inert gas in withstand voltage metal shell inside, as nitrogen, can certainly be air, helium or other gas.The volume of leather bag, the kind of gas, pressure need a plurality of factors such as the flow, pressure, pipeline volume according to high pressure fuel pump group 1 to determine, consider leaks, oxidability etc., used medium often is a nitrogen, and the volume of leather bag is 5～10 times of high pressure fuel pump group 1 per second volume flowrate.For reaching accurate control, consider that the leather bag of some volume on the market is difficult for buying, can utilize the incompressibility of liquid medium, by in leather bag, charging into the certain amount of fluid medium, the actual volume of leather bag is regulated.In addition, the inflation pressure of leather bag is relevant with the injection pressure of fuel pump outlet pressure and motor, and fitness for purpose is more lower slightly than minimum charge oil pressure.
Fuel pressure attenuate pulsations device 2 also disposes bladder type hydropneumatic accumulator inflator and pressure monitoring device, meets the demands to guarantee the leather bag internal pressure.
Be to guarantee the using effect of fuel pressure attenuating device, its mounting point should be approaching as far as possible with the entrance location of the outlet of high pressure fuel pump group 1, fuel flowmeter 3, and general span is that 5～10D (D is an outer diameter tube) is advisable.
The utility model is not limited to above-mentioned structure, can also be replaced by other form as bladder pressure attenuating device, as the structure of precision overflow valve.The utility model also is not limited to and is applied to Stirling engine; can also be applied to internal-combustion engine, gas turbine, oil-fired boiler and other need stablize the device of fuel feeding; in a word, as long as used the similar or identical structure of the utility model, all will fall into protection domain of the present utility model.
Claims (4)
1. Stirling engine fuel oil supply system, comprise plunger type high-pressure fuel pump group (1), fuel flowmeter (3) and corresponding pipeline and valve member, described fuel flowmeter (3) is highi degree of accuracy mass flowmenter or positive displacement flowmeter, be arranged between plunger type high-pressure fuel pump group (1) and the Stirling engine (4), it is characterized in that: between described plunger type high-pressure fuel pump group (1) and fuel flowmeter (3), arranged a fuel pressure attenuate pulsations device (2) that reduces the fuel pressure fluctuation.
2. Stirling engine fuel oil supply system according to claim 1 is characterized in that: the mounting point of fuel pressure attenuate pulsations device (2) respectively with high pressure fuel pump group (1), fuel flowmeter (3) fuel pipe external diameter at a distance of 5～10 times.
3. Stirling engine fuel oil supply system according to claim 1 and 2, it is characterized in that: described fuel pressure attenuate pulsations device (2) is the bag type accumulator structure, and the volume of bag type accumulator is 5～10 times of fuel pump group per second volume flowrate.
4. Stirling engine fuel oil supply system according to claim 3 is characterized in that: described fuel pressure attenuate pulsations device (2) also disposes bag type accumulator inflator and pressure monitoring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920074080XU CN201517450U (en) | 2009-06-15 | 2009-06-15 | Fuel supplying system of Stirling engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920074080XU CN201517450U (en) | 2009-06-15 | 2009-06-15 | Fuel supplying system of Stirling engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201517450U true CN201517450U (en) | 2010-06-30 |
Family
ID=42498172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920074080XU Expired - Lifetime CN201517450U (en) | 2009-06-15 | 2009-06-15 | Fuel supplying system of Stirling engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201517450U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110388281A (en) * | 2019-05-23 | 2019-10-29 | 上海齐耀动力技术有限公司 | A kind of thermomotor fuel oil supply system and method |
| CN114060846A (en) * | 2021-11-02 | 2022-02-18 | 中国船舶重工集团公司第七0三研究所 | Pressure control method for boiler fuel oil main pipe |
-
2009
- 2009-06-15 CN CN200920074080XU patent/CN201517450U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110388281A (en) * | 2019-05-23 | 2019-10-29 | 上海齐耀动力技术有限公司 | A kind of thermomotor fuel oil supply system and method |
| CN114060846A (en) * | 2021-11-02 | 2022-02-18 | 中国船舶重工集团公司第七0三研究所 | Pressure control method for boiler fuel oil main pipe |
| CN114060846B (en) * | 2021-11-02 | 2024-05-17 | 中国船舶重工集团公司第七0三研究所 | Boiler fuel oil main pipe pressure control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100630 |
|
| CX01 | Expiry of patent term |