CN105317602A - External fuel pump assembly - Google Patents
External fuel pump assembly Download PDFInfo
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- CN105317602A CN105317602A CN201510355843.8A CN201510355843A CN105317602A CN 105317602 A CN105317602 A CN 105317602A CN 201510355843 A CN201510355843 A CN 201510355843A CN 105317602 A CN105317602 A CN 105317602A
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- fuel
- pump assembly
- upper cavity
- external fuel
- centrifugal pump
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Abstract
The invention relates to the field of liquid delivery, in particular to an external fuel pump assembly for motorcycle fuel delivery. A fuel pump and related pipelines are connected into the assembly in a sealed mode, a lower cavity of the assembly is filled with fuel, a high-pressure oil region is formed in an upper cavity through the fuel pump, and finally the whole assembly can be arranged externally. The assembly effectively avoids a fuel turbulence phenomenon caused by gas in the fuel delivery process and reduces flow resistance in a fuel outlet pipe. The assembly is beneficial to uniform convection of heat generated by the fuel pump and increasing of the heat dissipation surface area. It can be ensured that the pressure impact variation range in the working process of a centrifugal pump is stable, and the service life of the fuel pump is prolonged. The requirement for the inventory of fuel in a fuel tank is low, and dismounting, mounting and maintenance are convenient.
Description
Technical field
The present invention relates to Liquid transfer field, especially relate to a kind of external fuel oil pump assembly for motorcycle fuel conveying.
Background technique
China Patent Publication No. CN101865057B, publication date on December 28th, 2011, the name of innovation and creation is called a kind of electric fuel pump assembly, that application discloses a kind of fuel pump be built in fuel tank.Its deficiency has certain requirement to the oil mass in fuel tank and oil level, and need in fuel tank, arrange complicated mount fixing structure.
Fuel pump is that vapour rubs the technical term of accessory industry, is one of fundamental composition of electric jet vehicle fuel injection system.The fuel pump of current motorcycle is arranged in fuel tank more, by the fuel delivery in fuel tank in motor.Effect is transported in fuel supply line after fuel oil sucking-off from fuel tank, pressurization, and certain fuel pressure is set up in fuel pressure regulator cooperation.The maximum pump oil pressure of fuel pump depends on the standard of pressure restrictor, if fuel pump pressure exceedes predetermined pressure restriction, pressure restrictor can open bypass makes fuel oil flow back to fuel pump inlet.
Summary of the invention
The object of the present invention is to provide a kind of easy for installation, and to the external fuel oil pump assembly that fuel level in tank does not almost require.It comprises: a body, is provided with separate upper cavity and lower chamber in described body.This lower chamber is provided with an oil inlet pipe and a return tube, and this upper cavity is provided with an oil outlet tube, and described oil outlet tube is sealedly connected with filter two in upper cavity.
One centrifugal pump, being fixedly installed in lower chamber of its entirety, and centrifugal pump is provided with oil inlet end, described oil inlet end is communicated with lower chamber.Described oil inlet end is provided with filter one, and centrifugal pump is also provided with oil outlet end, and described oil outlet end is communicated with upper cavity, and this centrifugal pump is also provided with exhaust port.
One one-way valve, described one-way valve is arranged in described oil outlet tube, and described one-way valve is for stoping fuel flow returns in oil outlet tube in upper cavity.
Described oil outlet tube is provided with bypass, and the connecting end of described bypass and oil outlet tube is between one-way valve and upper cavity.One pressure regulator valve, is tightly connected between the input end of described pressure regulator valve and described bypass.The output terminal of described pressure regulator valve is sealed with return tube by pipeline one and is communicated with; Described exhaust port is by being communicated with between pipeline two with described return tube.
Further be improved to, be connected by hermetic terminal between the power line of described centrifugal pump with described external electrical plug.Described hermetic terminal comprises fixed hole, tenminal block, metal insert, and described metal insert is electrically connected with between electrical plug.One end of described tenminal block is connected with metal insert, is electrically connected between its other end with centrifugal pump.Described tenminal block outer rim is provided with annular pawl, is provided with seal ring one between described tenminal block and fixed hole, provides fastening force to make seal ring one deformable seal by the interference fit between annular pawl and fixed hole.
Further be improved to, be provided with cushion between the one end described body and described centrifugal pump being provided with exhaust port, the acting surface of described cushion becomes Special-Shaped Surface, and the structure of described Special-Shaped Surface and the matching form of each contacting point close.
Further be improved to, described pipeline one and pipeline two are two joints of three-way pipe, and the 3rd joint of described three-way pipe and return tube seal through.
Further be improved to, between described pressure regulator valve and bypass, be provided with seal ring two, between described pressure regulator valve and pipeline one, be provided with seal ring three.
Further be improved to, sealed by interference fit between described three-way pipe and return tube.
Further be improved to, described one-way valve is ball valve.
Further be improved to, described filter one and described filter two are all leaf filter.
Further be improved to, described body outer rim is provided with mounting hole.
Further be improved to, have between a holding area in described body, the two ends between described holding area are respectively described upper cavity and described lower chamber, are provided with dividing plate between described upper cavity and lower chamber.
Beneficial effect of the present invention is: the air in centrifugal pump can first be discharged by (1) pipeline two from return tube, the flow resistance effectively can avoided the fuel oil turbulent flow phenomenon in fuel delivery process because caused by gas and reduce in oil outlet tube; (2) fuel oil can realize sufficient contact by entering in lower chamber via oil inlet pipe, and the heat convection current contributing to fuel pump to produce evenly also increases the surface area of heat radiation; (3) time under engine idle conditions, by the fuel oil in oil outlet tube being flowed back to fuel tank through return tube after bypass pressure regulation, can ensure that centrifugal pump compression shock excursion is in the course of the work stablized, improve the working life of fuel pump; (4) require low to the fuel oil recoverable amount in fuel tank, dismounting and easy to maintenance.
Accompanying drawing explanation
Fig. 1 is the profile outline of an embodiment of external fuel oil pump assembly of the present invention;
Fig. 2 is the structure sectional view of an embodiment of external fuel oil pump assembly of the present invention;
Fig. 3 is the internal structure schematic diagram of an embodiment of external fuel oil pump assembly of the present invention;
The oil inlet end structural representation that Fig. 4 is the centrifugal pump in the fuel pump shown in Fig. 1;
Fig. 5 is the structural representation of the sealed connecting terminal of the centrifugal pump in the fuel pump shown in Fig. 1.
Description of reference numerals:
10-body, 11-dividing plate, between 12-holding area, 122-upper cavity, 124-lower chamber, 13-oil inlet pipe, 14-return tube, 15-oil outlet tube, 152-one-way valve, 154-bypass, 16-electrical plug, 17-mounting hole, 20-centrifugal pump, 21-oil inlet end, 22-filter one, 23-oil outlet end, 24-filter two, 25-exhaust port, 26-power line, 27-hermetic terminal, 272-fixed hole, 274-tenminal block, 276-metal insert, 277-annular pawl, 278-seal ring one, 30-pressure regulator valve, 32-pipeline one, 34-pipeline two, 35-seal ring two, 36-seal ring three, 40-cushion.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, the effect of the mutual alignment between the shape of each component involved in the specific embodiment of the present invention, structure, each several part and annexation, each several part and working principle etc. are described in further detail.
As shown in Figure 1, this external fuel oil pump assembly is tightly connected is formed by upper end cap, lower end cap, staving.Wherein be fastened by bolts between end cap and staving up and down.Upper and lower end cap and staving together constitute the body 10 of fuel oil pump assembly, and body 10 inside to be formed with between holding area 12 for arranging various element.Between holding area, be provided with dividing plate 11 in 12, this dividing plate 11 is by 12 upper cavity 122 and the lower chambers 124 being divided into relative closure between holding area.This lower chamber 124 is equipped with oil inlet pipe 13 and a return tube 14, this upper cavity 122 is equipped with an oil outlet tube 15; Electrical plug 16 is provided with for assembly in-line power in the outer one of body 10.
As shown in Figure 2,3, in lower chamber 124, be provided with a centrifugal pump 20, being fixedly installed in lower chamber 124 of its entirety, and the bottom of centrifugal pump 20 is provided with oil inlet end 21.This oil inlet end 21 is through with lower chamber 124, oil inlet end 21 is sealedly connected with leaf filter 1, fuel oil enters through oil inlet pipe 13 and fills whole lower chamber 124, through entering into centrifugal pump 20 by oil inlet end 21 then filtered out the impurity in fuel oil fast by leaf filter 1 after.
In order to the compact structure of assembly can be made, the entirety trend of this leaf filter 1 and the parallel to an axis of centrifugal pump 20.The top of centrifugal pump 20 is provided with oil outlet end 23, and this oil outlet end 23 passes dividing plate 11 and seals through with upper cavity 122, makes the fuel oil via centrifugal pump 20 form high pressure fuel district in upper cavity 122.Then fuel oil is made by oil outlet tube 15 to engine oil, in order to avoid the fuel oil being supplied to motor contains impurity, so oil outlet tube 15 is sealedly connected with leaf filter 2 24 in upper cavity 122.Fuel delivery is carried out, so be provided with the exhaust port 25 for air in drain pump on the bottom of centrifugal pump 20 owing to adopting centrifugal pump 20.
When centrifugal pump 20 quits work, because the oil pressure in oil outlet tube 15 can higher than the oil pressure in upper cavity 122, so the phenomenon that fuel oil flows backwards can be produced.In order to prevent the generation in this situation, oil outlet tube 15 is provided with one-way valve 152, this one-way valve 152 is hemispheric ball valve, is fixedly connected with piston rod in one end of ball valve.Simultaneously in order to prevent because motor reduces fuel demand in the idling state, cause that oil pressure in oil outlet tube 15 and upper cavity 122 is too high to be damaged centrifugal pump 20 and whole assembly.Pipeline on oil outlet tube 15 between one-way valve 152 and upper cavity 122 is sealedly connected with the bypass 154 of pressure release.
This bypass 154 is arranged along the direction pointing to return tube 14, bypass 154 is also provided with pressure regulator valve 30, is fastened be sealed connected together between the input end of this pressure regulator valve 30 and bypass 154 by seal ring 2 35.The output terminal of pressure regulator valve 30 is sealed connected together by seal ring 3 35 and pipeline 1, and the fuel oil that bypass 154 is let out that is tightly connected between pipeline 1 and return tube 14 is input in fuel tank by return tube 14.Because the oil pressure in the bypass 154 of pressure release and pipeline 1 is comparatively large, so need to ensure that the fuel oil completely and in lower chamber 122 separates by strict sealing.
As shown in Figure 3,4, the bottom of centrifugal pump 20 is provided with exhaust port 25, this exhaust port 25 air of discharging easily and fuel oil mixing and to cause in oil circuit containing air, causes flow resistance increase, even also can cause and burn uneven etc., easily cause damage to motor etc. lower chamber 124 in.So installed a three-way pipe in the present embodiment, a siphunculus of this three-way pipe and pipeline 1, its another bipass and return tube 14 interference fit have been set in together.Its three-way pipe and exhaust port 25 are sealed connected together.Such high pressure oil return and air can guide fuel tank into by this three-way pipe.
As shown in Figure 5, in upper cavity 122, the power line 26 of centrifugal 20 is connected by hermetic terminal 17 with between described electrical plug 16; Sealing terminal 17 comprises fixed hole 272, tenminal block 274, metal insert 276, wherein be electrically connected between metal insert 276 with electrical plug 16, one end of described tenminal block 274 is connected with metal insert 276, be electrically connected between its other end with centrifugal pump 20, described tenminal block 274 outer rim is provided with annular pawl 277, be provided with seal ring 1 between this tenminal block 274 and fixed hole 272, provide fastening force to make seal ring 1 deformable seal by the interference fit between annular pawl 277 and fixed hole 272.
As shown in Figure 2,3, 4, in order to the pipeline 2 34 in threeway being made with exhaust port 25 compact siro spinning technology and sealing, cushion 40 is provided with between body 10 and the bottom of centrifugal pump 20, this cushion 40 is arranged to and special-shaped step surface with the side contacted bottom centrifugal pump 20, distance bottom each step surface distance centrifugal pump 20 and between the stress surface of pipeline 2 34 is equal, can effectively ensure like this centrifugal pump 20 operationally can stable operation, noise low.And close contact between pipeline 2 34 and exhaust port 25 can be made to realize being tightly connected.
Claims (10)
1. external fuel oil pump assembly, comprising:
One body (10), is provided with separate upper cavity (122) and lower chamber (124) in described body (10); This lower chamber (124) is provided with an oil inlet pipe (13) and a return tube (14), and this upper cavity (122) is provided with an oil outlet tube (15), and described oil outlet tube (15) is sealedly connected with filter two (24) in upper cavity (122);
One centrifugal pump (20), its entirety be fixedly installed in lower chamber (124), and centrifugal pump (20) is provided with oil inlet end (21), described oil inlet end (21) is communicated with lower chamber (124), described oil inlet end (21) is provided with filter one (22), centrifugal pump (20) is also provided with oil outlet end (23), described oil outlet end (23) is communicated with upper cavity (122), this centrifugal pump (20) is also provided with exhaust port (25);
One one-way valve (152), described one-way valve (152) is arranged in described oil outlet tube (15), and described one-way valve (152) is for stoping fuel flow returns in oil outlet tube (15) in upper cavity (122);
It is characterized in that:
Described oil outlet tube (15) is provided with bypass (154), the connecting end of described bypass (154) and oil outlet tube (15) is positioned between one-way valve (152) and upper cavity (122);
One pressure regulator valve (30), is tightly connected between the input end of described pressure regulator valve (30) and described bypass (154); The output terminal of described pressure regulator valve (30) is sealed with return tube (14) by pipeline one (32) and is communicated with; Described exhaust port (25) is by being communicated with between pipeline two (34) with described return tube (14).
2. external fuel oil pump assembly as claimed in claim 1, is characterized in that: the power line (26) of described centrifugal pump (20) is connected by hermetic terminal (27) with between described body (10) electrical plug outward (16), described hermetic terminal (27) comprises fixed hole (272), tenminal block (274), metal insert (276), be electrically connected between described metal insert (276) with electrical plug (16), one end of described tenminal block (274) is connected with metal insert (276), be electrically connected between its other end with centrifugal pump (20), described tenminal block (274) outer rim is provided with annular pawl (277), seal ring one (278) is provided with between described tenminal block (274) and fixed hole (272), there is provided fastening force to make seal ring one (278) deformable seal by the interference fit between annular pawl (277) and fixed hole (272).
3. external fuel oil pump assembly as claimed in claim 1 or 2, it is characterized in that: between the one end described body (10) and described centrifugal pump (20) being provided with exhaust port (25), be provided with cushion (40), the acting surface of described cushion (40) becomes Special-Shaped Surface, and the structure of described Special-Shaped Surface and the matching form of each contacting point close.
4. external fuel oil pump assembly as claimed in claim 3, it is characterized in that: two joints that described pipeline one (32) and pipeline two (34) are three-way pipe, the 3rd joint of described three-way pipe and return tube (14) seal through.
5. external fuel oil pump assembly as claimed in claim 4, is characterized in that: be provided with seal ring two (35) between described pressure regulator valve (30) and bypass (154), is provided with seal ring three (36) between described pressure regulator valve (30) and pipeline one (32).
6. external fuel oil pump assembly as claimed in claim 5, be is characterized in that: sealed by interference fit between described three-way pipe and return tube (14).
7. external fuel oil pump assembly as claimed in claim 6, is characterized in that: described one-way valve (152) is ball valve.
8. external fuel oil pump assembly as claimed in claim 7, is characterized in that: described filter one (22) and described filter two (24) are all leaf filter.
9. external fuel oil pump assembly as claimed in claim 8, is characterized in that: described body (10) outer rim is provided with mounting hole (17).
10. external fuel oil pump assembly as claimed in claim 9, it is characterized in that: there are in described body (10) (12) between a holding area, between described holding area, the two ends of (12) are respectively described upper cavity (122) and described lower chamber (124), are provided with dividing plate (11) between described upper cavity (122) and lower chamber (124).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510355843.8A CN105317602B (en) | 2015-06-25 | 2015-06-25 | External fuel oil pump assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510355843.8A CN105317602B (en) | 2015-06-25 | 2015-06-25 | External fuel oil pump assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105317602A true CN105317602A (en) | 2016-02-10 |
| CN105317602B CN105317602B (en) | 2018-06-12 |
Family
ID=55245727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510355843.8A Active CN105317602B (en) | 2015-06-25 | 2015-06-25 | External fuel oil pump assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105317602B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019200661A1 (en) * | 2018-04-18 | 2019-10-24 | 宁波洛卡特汽车零部件有限公司 | Safe small external fuel pump |
| CN113847176A (en) * | 2021-08-20 | 2021-12-28 | 重庆平山泰凯化油器有限公司 | External oil pump of motorcycle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4013053A (en) * | 1975-05-02 | 1977-03-22 | Stewart-Warner Corporation | Fuel pump |
| JPS56110552A (en) * | 1980-01-24 | 1981-09-01 | Trw Inc | Cartridgeepump device |
| CN2813939Y (en) * | 2005-07-26 | 2006-09-06 | 曹宝军 | Electric fuel-oil pump |
| CN101054941A (en) * | 2007-05-23 | 2007-10-17 | 力帆实业(集团)有限公司 | Enclosed oil pump assembly for motorcycle |
| CN101077724A (en) * | 2007-06-28 | 2007-11-28 | 联合汽车电子有限公司 | Fuel-feed system for motorcycle |
| CN202789254U (en) * | 2012-10-12 | 2013-03-13 | 众恒汽车部件有限公司 | External fuel pump for motorcycle |
-
2015
- 2015-06-25 CN CN201510355843.8A patent/CN105317602B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4013053A (en) * | 1975-05-02 | 1977-03-22 | Stewart-Warner Corporation | Fuel pump |
| JPS56110552A (en) * | 1980-01-24 | 1981-09-01 | Trw Inc | Cartridgeepump device |
| CN2813939Y (en) * | 2005-07-26 | 2006-09-06 | 曹宝军 | Electric fuel-oil pump |
| CN101054941A (en) * | 2007-05-23 | 2007-10-17 | 力帆实业(集团)有限公司 | Enclosed oil pump assembly for motorcycle |
| CN101077724A (en) * | 2007-06-28 | 2007-11-28 | 联合汽车电子有限公司 | Fuel-feed system for motorcycle |
| CN202789254U (en) * | 2012-10-12 | 2013-03-13 | 众恒汽车部件有限公司 | External fuel pump for motorcycle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019200661A1 (en) * | 2018-04-18 | 2019-10-24 | 宁波洛卡特汽车零部件有限公司 | Safe small external fuel pump |
| CN113847176A (en) * | 2021-08-20 | 2021-12-28 | 重庆平山泰凯化油器有限公司 | External oil pump of motorcycle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105317602B (en) | 2018-06-12 |
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