CN100366888C - Electric fuel pump suitable for fuel containing alcohol - Google Patents
Electric fuel pump suitable for fuel containing alcohol Download PDFInfo
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- CN100366888C CN100366888C CNB2006100175552A CN200610017555A CN100366888C CN 100366888 C CN100366888 C CN 100366888C CN B2006100175552 A CNB2006100175552 A CN B2006100175552A CN 200610017555 A CN200610017555 A CN 200610017555A CN 100366888 C CN100366888 C CN 100366888C
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Abstract
The present invention relates to an electric fuel oil pump which is suitable for fuel containing alcohol and is characterized in that an inner shell is arranged in a shell, and a cavity formed between the inner shell and the shell is used as a main conveying flow passage of fuel oil; a motor is arranged in the inner shell, and a secondary conveying flow channel of fuel oil is formed by a gap between motor elements in the inner shell. More than 80% of fuel oil is conveyed by the straight through the main conveying flow channel of fuel oil, and a small amount of residual fuel oil flowing across the secondary conveying flow channel mainly performs the functions of lubricating and cleaning the components in the secondary conveying flow channel and cooling rotors and stators, so that the effective conveying of the fuel oil is ensured, and the influence on the quality of the fuel oil in the conveying process of the fuel oil is greatly reduced. Meanwhile, the work efficiency of the motor is raised to a certain extent. Because a check valve is arranged on a fuel oil inlet of the secondary conveying flow channel of fuel oil and a conical rubbing pair is also arranged on a rotor lower bearing at the end of the impeller, working reliability and working safety are ensured.
Description
Technical field
The present invention relates to the electric fuel punp that uses on a kind of electro jet car, particularly a kind of electric fuel punp of carrying alcohol fuel that is applicable to.
Background technique
Electric fuel punp is a requisite heart component on the electro jet car, and its main task is that to supply with oil-fired system enough and the fuel oil of certain pressure arranged.
Usually, employed electric fuel punp mainly constitutes by shell, motor and by the electric motor driven pump housing on the electro jet car.Wherein, the pump housing is arranged on the bottom of shell, and the pump housing is provided with filler opening, can drive pump housing work when motor is switched on, with fuel oil from the filler opening suction stream through electric fuel punp inside, extrude to supply with oil-fired system through oil outlet again.In the said structure, the electric fuel oil pump check valve is arranged on the oil outlet place, and filler opening is the opened type structure, for employing have the brush motor structure and believe, pasta is low below transition point in fuel tank, under the operating mode to stall, at this moment, the following no fuel oil of motor safety check, whole motor forms cavity, the size of cavity increases and decreases with the height of fuel tank pasta, this kind operating mode is under the state that stops, the motor line bag, brush, commutator, lead-in wire exposes in mixed gas and easily cavitates, as if ato unit this moment, movable contact between motor brush and the commutator can produce spark in the moment of on/off, if normally used hydrocarbon gasoline mixture, because of its combustion boundary very narrow, the mixed gas that overrich is crossed alkene all can not burn, if but use China forcing the alcohol blended fuel of promoting at present, because pure generic is rich in the strong polar compound of oxygen, it mixes back formation low boiling azeotropic mixture with the hydrocarbon of gasoline, particularly cause the volatility of whole fuel to strengthen strongly in the hot summer, vapour tension seriously raises, the interface that catches fire broadens, under rarefaction of air or denseer situation, also can burn, at this moment, ato unit under the operating mode that mixed gas exists is arranged in low pasta motor cavity, the dry friction meeting produces electrical spark between motor brush and the commutator movable contact, the mixed gas that contains alcohol runs into spark and very easily causes detonation, causes danger.Simultaneously, alcohol fuel has certain corrosivity, and it will cause certain heel and toe wear to the corrosion of oil pump parts, greatly reduction of service life, it is scrapped too early.And flow through between motor rotor and the stator great amount of fuel oil because of by the time can form bigger eddy current, can form shear flow when flowing through the brush of brushing motor, and can produce big resistance, its size changes with the variation of flow pressure, directly have influence on the efficient of motor, alcohol fuel particularly, the eddy current that forms can increase the colloid of fuel oil at a high speed, particularly also can cause the deterioration of fuel qualities for the alcohol fuel that adds surface active agent.In addition then, the shaping for only having a straight flange that above-mentioned fuel pump adopted owing to motor rotor and connecting of impeller connects, though connecting, this kind have simple in structure, easily manufactured advantage, but the connecting structure that monolateral location cooperates is when rotor high-speed turns round, impeller bore has only a point stressed, relatively poor to neutrality, so not only wear phenomenon is serious, and noise is also bigger.
Summary of the invention
The present invention be directed to the deficiency that exists in the above-mentioned background technology, provide that a kind of performance is safe and reliable, efficient is high, long service life, be applicable to the electric fuel punp of carrying alcohol fuel.
Its concrete solution is: be provided with an inner casing in the housing, carry runner by the cavity that constitutes between inner casing and housing as the fuel oil master, motor is arranged in the inner casing, constitutes fuel oil by the gap between the motor component in the inner casing and carries runner, to significantly reduce the fuel oil of the motor of flowing through.The pump housing oil outlet that is positioned at the electric fuel punp bottom is carried the fuel oil oil inlet hole of runner to fire the fuel oil oil inlet hole of carrying runner to be communicated with, to carry by fuel oil runner with the fuel oil master by the fuel oil master respectively to be communicated with the inferior conveying of fuel oil runner.And the fuel oil oil outlet of fuel oil time conveying runner should be less than the fuel oil oil inlet hole of this runner.And fuel oil carries the fuel oil oil inlet hole place of runner to be provided with safety check, produces cavity effectively to avoid fuel oil to carry in the runner.For alleviating the heel and toe wear of fuel pump parts, and play the better seal effect, the rotor lower bearing place of impeller end is provided with a conical friction pair.
In addition then, lower end cap reaches between capping down and impeller and is provided with friction pair in the pump housing.
Moreover, described fuel oil time carry the fuel oil oil inlet hole aperture of runner should be the fuel oil master carry runner fuel oil oil inlet hole aperture 1/5, and fuel oil carries the fuel oil oil outlet aperture of runner to should be 2/3 of this conveying runner fuel oil oil inlet hole aperture.
Simultaneously, motor rotor connects with the shaping for having two straight flanges at least that connecting of impeller adopts, and to reduce stress raiser, increases the service life.
The present invention is provided with the master, inferior two-way fuel delivery runner, make the fuel oil more than 80% carry runner to carry by straight-through fuel oil master, and all the other fuel oils time of flowing through on a small quantity carry the fuel oil of runners mainly be play lubricated, clean its inner piece, cooled rotor, effects such as stator, its high efficiency of both having guaranteed fuel oil is carried, reduce in the fuel delivery process influence greatly to fuel qualities, simultaneously, also improved the working efficiency of motor to a certain extent, and fuel oil time is carried the setting of the rotor bearing place conical friction pair of the setting of safety check under the fuel oil oil inlet hole place of runner and impeller end, also can effectively eliminate fuel oil and carry the cavity that produces in the runner, guarantee the reliability and the Security of work.Efficient height of the present invention, long service life, performance are safe and reliable, are particularly suitable for adopting on the automobile of alcohol fuel installing and using.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1.
Fig. 2 is the A-A cutaway view Amplified image of Fig. 1.
Fig. 3 is the structural representation of the embodiment of the invention 2.
Fig. 4 is the B-B cutaway view Amplified image of Fig. 3.
Embodiment
Among Fig. 1, Fig. 2, the upper/lower terminal of housing 7 is respectively arranged with upper end cap 23 and lower end cap 15, motor is arranged on the inner casing 8 that places in the housing 7, constitute the fuel oil master by housing 7 and inner casing 8 and carry runner 20, constitute fuel oil by motor stator and gap between rotor in the inner casing 8 and carry runner 6, the pump housing is positioned at the bottom of fuel pump, and the impeller 14 on it adopts the shaping connecting mode with three straight flanges to connect with the motor central shaft.Being arranged on down the fuel pump oil inlet hole 16 that is communicated with the pump housing in the capping 15 is a clear opening, and the pump housing oil outlet 13 that is positioned on the lower end cap 10 carries runner 20 to be communicated with through fuel oil oil inlet hole 11 with the fuel oil master, carry runner 6 to be communicated with through fuel oil oil inlet hole 9 with fuel oil, and, pump housing oil outlet 13 places are provided with down safety check 12, fuel pump oil outlet 1 place that is arranged on the upper end cap 23 is provided with upper check valve 2, and the fuel oil master carries runner 20 and fuel oil to carry the fuel oil oil outlet 5 of runner 6,4 are communicated with fuel pump oil outlet 1 respectively, wherein, the aperture of fuel oil oil inlet hole 9 is 1/5 of fuel oil oil inlet hole 11 apertures,, the aperture of fuel oil oil outlet 4 is 2/3 of fuel oil oil inlet hole 9 apertures.Simultaneously, the motor rotor central shaft be provided with one with the coaxial conical friction pair 19 that connects and match with lower bearing 18 upper-end surfaces of lower bearing 18.And the following capping 15 and 14 in the impeller of the lower end cap 10 of upper impeller and impeller bottom is provided with friction pair 17 in the pump housing.
During work, can connect power supply by motor power line 24, motor drives impeller 14 rotates synchronously, make impeller 14 bottoms produce negative pressure, fuel oil enters blade wheel chamber through fuel pump oil inlet hole 16 under atmospheric effect, then, the fuel oil that pumps through pump housing oil outlet 13 enters the fuel oil master and carries runner 20 more than 80%, and safety check 12 enters fuel oil time conveying runner 6 under all the other fuel oils warps, from motor rotor 21, flow through in the gap between the stator 22, at last, respectively by the fuel oil master, inferior conveying runner fuel oil oil outlet 5, the fuel oil of 4 outputs enters engine oil tube through upper check valve 2 by 1 output of fuel pump oil outlet.
If fuel oil equipped at outlet port oil pressure is too high, when surpassing limit value, high pressure oil will be by pressure-limit valve 3 pressure releases.During fuel cut-off, upper check valve 2 is closed, the canned motor oil circuit, make oil-fired system keep certain residual voltage, be beneficial to quick ato unit next time, when upper check valve 2 is closed, following safety check 12 also cuts out simultaneously, and the fuel oil in the enclosed motor cavity makes it to be difficult for leaking under the secondary 19 excellent sealing states of conical friction, guarantee not produce cavity in the fuel oil time conveying runner, motor does not corrode, and when ato unit, because the arc extinguishing effect of fuel oil, for the brush motor is arranged, thoroughly avoided the generation of brush spark phenomenon.
Among Fig. 3, Fig. 4, the impeller 14 in the pump housing adopts the shaping connecting mode with four straight flanges to connect with the motor central shaft, and all the other structures are identical with embodiment 1.
Claims (4)
1. the electric fuel punp of a suitable alcohol fuel, the motor that comprises the pump housing and driven pump body running, it is characterized in that being provided with in the housing (7) inner casing (8), carry runner (20) by the cavity that constitutes between inner casing (8) and housing (7) as the fuel oil master, motor is arranged in the inner casing (8), constitute fuel oil by the gap between the motor component in the inner casing (8) and carry runner (6), the pump housing oil outlet (13) that is positioned at the electric fuel punp bottom carries the fuel oil oil inlet hole (11) of runner to carry runner (20) to be communicated with the fuel oil master by the fuel oil master respectively, carry the fuel oil oil inlet hole (9) of runner to carry runner (6) to be communicated with fuel oil by fuel oil, and, the fuel oil oil outlet (4) of fuel oil time conveying runner should be less than the fuel oil oil inlet hole (9) of this runner, and fuel oil carries the fuel oil oil inlet hole (9) of runner to locate to be provided with safety check (12), and the rotor lower bearing (18) of impeller end locates to be provided with a conical friction pair (19).
2. the electric fuel punp of a kind of suitable alcohol fuel according to claim 1 is characterized in that being provided with friction pair (17) between lower end cap in the pump housing (10) and following capping (15) and impeller (14).
3. the electric fuel punp of a kind of suitable alcohol fuel according to claim 1, it is characterized in that fuel oil time carry fuel oil oil inlet hole (9) aperture of runner should be the fuel oil master carry runner fuel oil oil inlet hole (11) aperture 1/5, and fuel oil carries fuel oil oil outlet (4) aperture of runner to should be 2/3 of this conveying runner fuel oil oil inlet hole (9) aperture.
4. the electric fuel punp of a kind of suitable alcohol fuel according to claim 1 is characterized in that the shaping of adopting motor rotor and connecting of impeller (14) for having three straight flanges at least connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100175552A CN100366888C (en) | 2006-03-19 | 2006-03-19 | Electric fuel pump suitable for fuel containing alcohol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100175552A CN100366888C (en) | 2006-03-19 | 2006-03-19 | Electric fuel pump suitable for fuel containing alcohol |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1821566A CN1821566A (en) | 2006-08-23 |
| CN100366888C true CN100366888C (en) | 2008-02-06 |
Family
ID=36923104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100175552A Expired - Fee Related CN100366888C (en) | 2006-03-19 | 2006-03-19 | Electric fuel pump suitable for fuel containing alcohol |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100366888C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913357B (en) * | 2011-08-03 | 2014-06-11 | 上海柱信汽车电子燃油系统有限公司 | Electric fuel pump |
| CN102953881A (en) * | 2012-11-22 | 2013-03-06 | 无锡惠山泵业有限公司 | Fuel pump |
| CN104682625B (en) * | 2015-01-30 | 2017-08-01 | 中北大学 | A pump integrated with a brushless, slotless, sensorless DC motor |
| CN109113988B (en) * | 2017-06-26 | 2020-10-23 | 比亚迪股份有限公司 | Electric oil pump assembly, steering system and lubricating system |
| CN109113954B (en) * | 2017-06-26 | 2020-10-23 | 比亚迪股份有限公司 | Electric oil pump assembly, steering system and lubricating system |
| CN112628039B (en) * | 2020-12-18 | 2021-12-21 | 浙江睿峰电喷系统有限公司 | An intelligent electric fuel pump with electronic pressure regulator |
| CN113294234B (en) * | 2021-04-30 | 2022-10-18 | 东风汽车集团股份有限公司 | Electric water pump of water-cooling controller |
| CN113236455B (en) * | 2021-05-25 | 2022-07-12 | 南京航空航天大学 | A high-power-density electric fuel pump for multi-electric aviation auxiliary devices |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5823169A (en) * | 1996-05-08 | 1998-10-20 | Robert Bosch Gmbh | Aggregate for feeding fuel from supply tank to internal combustion engine |
| CN1409008A (en) * | 2001-09-18 | 2003-04-09 | 李万浩 | Electric pump |
| CN1548774A (en) * | 2003-05-07 | 2004-11-24 | 深圳航天微电机有限公司 | Electric fuel pump |
| CN1594886A (en) * | 2004-07-05 | 2005-03-16 | 薛肇江 | Electric and fuel double groove impeller pump |
| US20050158180A1 (en) * | 2004-01-16 | 2005-07-21 | Gunter Wagner | Method for setting the feed rate of a fuel pump unit, which sucks up fuel from a fuel tank, and fuel pump unit for the method |
| CN2869395Y (en) * | 2006-03-19 | 2007-02-14 | 曹宝军 | Electric fuel pump suitable for alcohol fuel |
-
2006
- 2006-03-19 CN CNB2006100175552A patent/CN100366888C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5823169A (en) * | 1996-05-08 | 1998-10-20 | Robert Bosch Gmbh | Aggregate for feeding fuel from supply tank to internal combustion engine |
| CN1409008A (en) * | 2001-09-18 | 2003-04-09 | 李万浩 | Electric pump |
| CN1548774A (en) * | 2003-05-07 | 2004-11-24 | 深圳航天微电机有限公司 | Electric fuel pump |
| US20050158180A1 (en) * | 2004-01-16 | 2005-07-21 | Gunter Wagner | Method for setting the feed rate of a fuel pump unit, which sucks up fuel from a fuel tank, and fuel pump unit for the method |
| CN1594886A (en) * | 2004-07-05 | 2005-03-16 | 薛肇江 | Electric and fuel double groove impeller pump |
| CN2869395Y (en) * | 2006-03-19 | 2007-02-14 | 曹宝军 | Electric fuel pump suitable for alcohol fuel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1821566A (en) | 2006-08-23 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080206 |