CN2869395Y - Electric fuel pump suitable for alcohol fuel - Google Patents
Electric fuel pump suitable for alcohol fuel Download PDFInfo
- Publication number
- CN2869395Y CN2869395Y CN 200620030271 CN200620030271U CN2869395Y CN 2869395 Y CN2869395 Y CN 2869395Y CN 200620030271 CN200620030271 CN 200620030271 CN 200620030271 U CN200620030271 U CN 200620030271U CN 2869395 Y CN2869395 Y CN 2869395Y
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- fuel
- oil
- fuel oil
- runner
- motor
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Abstract
A electric fuel pump suitable for alcoholic fuel, the features of which are: a inner shell is positioned in shell body, a cavity formed between the inner shell and the shell body is taken as a main flow channel of fuel, a motor is arranged in the inner shell, the clearance between motor elements in the inner shell is formed the second flow channel of fuel to make more than 80% of fuel is delivered through the main flow channel of fuel and the rest fuel delivered passing through the second flow channel is used for lubricating and washing the internal parts, cooling rotor and stator, this can guarantee high efficiency delivery of fuel, decrease greatly the influence for quality of fuel during transport process and improve working efficiency of motor to a certain degree. Because a check valve is arranged at fuel inlet of second fuel delivery flow channel, a conical friction pair is arranged at lower bearing of rotor on vane wheel end, the reliability and safety of working can be guaranteed.
Description
Technical field
The utility model 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 the structure that employing has the brush motor, 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.
The model utility content
The utility model is the deficiency that exists in the above-mentioned background technology, provides that a kind of performance is safe and reliable, efficient is high, long service life, is 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 utility model 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.The utility model efficient height, 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 utility model embodiment 1 a structural representation.
Fig. 2 is the A-A cutaway view Amplified image of Fig. 1.
Fig. 3 is the utility model embodiment 2 a structural representation.
Fig. 4 is the B-B cutaway view Amplified image of Fig. 3.
Embodiment
Embodiment 1
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, a kind of electric fuel punp of 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 two straight flanges at least connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620030271 CN2869395Y (en) | 2006-03-19 | 2006-03-19 | Electric fuel pump suitable for alcohol fuel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620030271 CN2869395Y (en) | 2006-03-19 | 2006-03-19 | Electric fuel pump suitable for alcohol fuel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2869395Y true CN2869395Y (en) | 2007-02-14 |
Family
ID=37724330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620030271 Expired - Lifetime CN2869395Y (en) | 2006-03-19 | 2006-03-19 | Electric fuel pump suitable for alcohol fuel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2869395Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100366888C (en) * | 2006-03-19 | 2008-02-06 | 曹宝军 | Electric fuel pump suitable for fuel containing alcohol |
-
2006
- 2006-03-19 CN CN 200620030271 patent/CN2869395Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100366888C (en) * | 2006-03-19 | 2008-02-06 | 曹宝军 | Electric fuel pump suitable for fuel containing alcohol |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080206 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |