CN210686160U - Electric fuel pump assembly structure - Google Patents
Electric fuel pump assembly structure Download PDFInfo
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- CN210686160U CN210686160U CN201921599566.5U CN201921599566U CN210686160U CN 210686160 U CN210686160 U CN 210686160U CN 201921599566 U CN201921599566 U CN 201921599566U CN 210686160 U CN210686160 U CN 210686160U
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Abstract
The utility model relates to the technical field of fuel pumps, and discloses an electric fuel pump assembly structure, including storing oil box, fuel pump body, blind flange, connect through advancing oil pipe between fuel pump body and the oil outlet joint, through returning oil pipe connection between the bottom of oil storage box and the injection nozzle of oil return joint, the inside upper end of oil storage box is equipped with the automatic voltage regulator, and the automatic voltage regulator includes the voltage regulator casing, the upper end of voltage regulator casing is equipped with first interface, second interface, and the upper end of first pressure regulating chamber leads to the intercommunication with the lower extreme in second pressure regulating chamber, is equipped with the pressure limiting valve in the first pressure regulating chamber; the side of the pressure regulator shell is provided with an overflow seat, the outer end of the overflow seat is provided with an end cover, a piston is arranged in the overflow seat, a first pressure spring is arranged between the piston and the end cover, and the side of the overflow seat is provided with an overflow port communicated with the oil storage box. The utility model discloses have can effectively adjust the oil return pressure who draws the nozzle, prevent to draw the nozzle department pressure too big oil residue, the impurity that lead to the oil tank bottom by the beneficial effect of kicking up.
Description
Technical Field
The utility model relates to a fuel pump technical field especially relates to an electronic fuel pump assembly structure.
Background
The electric fuel pump assembly is positioned in an automobile fuel tank, and when the electric fuel pump works, fuel in the fuel tank is pressurized to set pressure and flow, and the fuel is continuously conveyed to an automobile engine through a fuel pipeline. In order to meet the oil supply requirements of various working conditions of an engine, the oil transportation amount in unit time is usually larger than the oil consumption amount in unit time under the working condition of rated power of the engine, the oil supply amount is usually several times of the oil consumption amount of the engine, and finally, the oil is not consumed by the engine and then returns to an oil tank through an injection nozzle of an oil return pipe.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the above-mentioned problem that the electronic fuel pump among the prior art exists, provide an electronic fuel pump assembly structure, this kind of electronic fuel pump assembly can effectively adjust the return pressure who draws the nozzle, prevents to draw the too big dregs of fat, the impurity that leads to the oil tank bottom of nozzle department pressure to be raised and block up the filter screen.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an electric fuel pump assembly structure comprises an oil storage box, a fuel pump body and a flange cover, wherein the flange cover is connected with the oil storage box through a connecting rod, an oil outlet joint and an oil return joint are arranged on the flange cover, the fuel pump body is connected with the oil outlet joint through an oil inlet pipe, the oil return joint is connected with an injection nozzle at the bottom of the oil storage box through an oil return pipe, an automatic pressure regulator is arranged at the upper end inside the oil storage box and comprises a pressure regulator shell, a first interface and a second interface are arranged at the upper end of the pressure regulator shell, the upper ends of the first interface and the second interface are connected into the oil return pipe, a first pressure regulating cavity and a second pressure regulating cavity are sequentially arranged in the pressure regulator shell from bottom to top, the upper end of the first pressure regulating cavity is communicated with the lower end of the second pressure regulating cavity, the lower end of the first interface is communicated with the side face of the upper end of the first pressure regulating cavity, the lower end of the second interface is communicated with the side surface of the upper end of the second pressure regulating cavity, and a pressure limiting valve is arranged in the first pressure regulating cavity; the side of pressure regulator casing is equipped with the overflow seat, the inner of overflow seat is through the side intercommunication in water conservancy diversion hole and second pressure regulating chamber, the outer end of overflow seat is equipped with the end cover, is equipped with the piston in the overflow seat, be equipped with first pressure spring between piston and the end cover, the side of overflow seat is equipped with the overflow mouth with the oil storage box intercommunication.
The oil storage box is arranged in the oil tank, and the oil outlet joint and the oil return joint are connected with an oil supply pipeline of the engine; the fuel pump body works, the fuel in the fuel storage box sequentially passes through the fuel pump body, the fuel inlet pipe and the fuel outlet connector to enter an engine pipeline, the redundant fuel passes through the oil return connector, the oil return pipe, the automatic pressure regulator and the injection nozzle to enter the fuel storage box, and the pressure limiting valve is used for keeping the oil pressure in the oil return pipe so as to meet the rated oil pressure required in the engine pipeline; the oil pressure of the fuel oil discharged from the pressure limiting valve is larger (the oil pressure is larger, if the fuel oil is directly discharged into the oil storage box), then when the fuel oil passes through the second pressure regulating cavity, the fuel oil overcomes the pressure of the first pressure spring and jacks up the piston, a part of the fuel oil flows into the oil storage box from the overflow port to be decompressed, the other part of the fuel oil enters the bottom of the oil storage box from the injection nozzle, the injection nozzle brings the fuel oil in the oil tank into the oil storage box, and at the moment, the oil pressure at the injection nozzle is reduced, so that the oil residue and impurities at the bottom of the oil tank are prevented from being stirred and lifted up to block a filter screen in an oil; meanwhile, the noise in the oil tank is reduced, and the excessive pressure of an oil way system caused by the unsmooth oil return of the pressure limiting valve can be effectively avoided; reduce the inside steam formation of oil tank for carbon tank adsorption effect is better.
Preferably, the pressure limiting valve comprises a valve seat and a valve core, the valve seat is fixed in the first pressure regulating cavity, an elastic diaphragm is arranged in the valve seat, the valve core is fixed on the elastic diaphragm, a pressure limiting spring is arranged between the lower end of the valve core and the lower end of the valve seat, an oil outlet pipe is arranged at the center of the upper end of the valve seat, the upper end of the oil outlet pipe extends into the second pressure regulating cavity, the upper end of the valve core is abutted against the lower end of the oil outlet pipe, and an oil inlet hole communicated with the first connector is formed in the upper end of the valve seat.
Preferably, the valve core comprises a valve core seat and a valve core body, wherein a spherical pit is arranged at the upper end of the valve core seat, a counter bore is arranged at the center of the spherical pit, the valve core body is spherical, a sealing plane abutted against the lower end of the oil outlet pipe is arranged at the upper end of the valve core body, the valve core body is arranged in the spherical pit, a limiting necking for preventing the valve core body from falling off is arranged at the opening end of the spherical pit, and a second pressure spring is arranged in the counter bore. The case body can be at sphere pit internal rotation within a certain limit to ensure that sealed plane can all the time with the lower terminal surface butt of oil pipe, sealed, thereby reduce the assembly required precision of oil pipe and disk seat, stability is better.
Preferably, a sealing ring is arranged between the oil outlet pipe and the second pressure regulating cavity, and a sealing ring is arranged between the valve seat and the first pressure regulating cavity. The sealing ring plays a sealing role.
Preferably, an arc-shaped groove is formed in the outer side wall of the oil storage box, a sliding sleeve is fixed in the arc-shaped groove, the lower end of the connecting rod is connected with the sliding sleeve in a sliding mode, a limiting protruding block is arranged at the end portion of the lower end of the connecting rod, and a third pressure spring is sleeved on the outer side of the connecting rod. The oil storage box is connected with the sliding sleeve in a sliding mode through the connecting rod, and on one hand, the bottom of the oil storage box can be attached to the bottom of the oil tank.
Therefore, the utility model discloses following beneficial effect has: (1) the oil pressure at the position of the injection nozzle is automatically adjusted, so that oil residue and impurities on the bottom surface of the oil tank are prevented from being stirred and lifted due to overlarge oil pressure, and a filter screen is prevented from being blocked; (2) the noise of the stirring of the fuel in the fuel tank is reduced.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an isometric view of fig. 1.
Fig. 3 is a schematic view of a partial structure of the present invention.
Fig. 4 is a schematic diagram of the connection of the oil return pipe and the automatic pressure regulator.
Fig. 5 is a schematic structural diagram of an automatic voltage regulator.
Fig. 6 is a schematic structural view of the pressure limiting valve.
In the figure: the fuel pump comprises an oil storage box 1, a fuel pump body 2, a flange cover 3, a connecting rod 4, an arc-shaped groove 5, a sliding sleeve 6, a third pressure spring 7, an oil outlet joint 8, an oil return joint 9, an oil inlet pipe 10, an injection nozzle 11, an oil return pipe 12, an automatic pressure regulator 13, a pressure regulator shell 130, a first interface 131, a second interface 132, a first pressure regulating cavity 133, a second pressure regulating cavity 134, an overflow seat 135, an end cover 136, a piston 137, a first pressure spring 138, an overflow port 139, a pressure limiting valve 14, a valve seat 140, a valve core 141, a valve core seat 1410, a valve core body 1411, an elastic membrane 142, a pressure limiting spring 143, an oil inlet hole 144, a spherical pit 145, a counter bore 146, a sealing plane 147, a second pressure spring 148 and a sealing.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments:
as shown in fig. 1, 2 and 3, the electric fuel pump assembly structure comprises an oil storage box 1, a fuel pump body 2 and a flange cover 3, wherein the flange cover 3 is connected with the oil storage box 1 through a connecting rod 4, an arc-shaped groove 5 is formed in the outer side wall of the oil storage box 1, a sliding sleeve 6 is fixed in the arc-shaped groove, the lower end of the connecting rod 4 is in sliding connection with the sliding sleeve, a limiting convex block is arranged at the end part of the lower end of the connecting rod 4, and a third pressure spring 7 is sleeved on the outer side of the connecting rod 4; an oil outlet joint 8 and an oil return joint 9 are arranged on the flange cover 3, the fuel pump body 2 is connected with the oil outlet joint through an oil inlet pipe 10, the oil return joint 9 is connected with an injection nozzle 11 at the bottom of the oil storage box 1 through an oil return pipe 12, and an automatic pressure regulator 13 is arranged at the upper end inside the oil storage box;
as shown in fig. 4 and 5, the automatic pressure regulator 13 includes a pressure regulator housing 130, the upper end of the pressure regulator housing is provided with a first port 131 and a second port 132, the upper ends of the first port and the second port are connected to the oil return pipe 10, the pressure regulator housing 130 is internally provided with a first pressure regulating cavity 133 and a second pressure regulating cavity 134 from bottom to top in sequence, the upper end of the first pressure regulating cavity is communicated with the lower end of the second pressure regulating cavity, the lower end of the first port 131 is communicated with the upper end side surface of the first pressure regulating cavity 133, the lower end of the second port 132 is communicated with the upper end side surface of the second pressure regulating cavity 134, and the first pressure regulating cavity is internally provided with a pressure limiting valve 14; the side of the pressure regulator shell 130 is provided with an overflow seat 135, the inner end of the overflow seat 135 is communicated with the side of the second pressure regulating cavity through a diversion hole, the outer end of the overflow seat is provided with an end cover 136, a piston 137 is arranged in the overflow seat, a first pressure spring 138 is arranged between the piston and the end cover, and the side of the overflow seat is provided with an overflow port 139 communicated with the oil storage box.
As shown in fig. 6, the pressure limiting valve 14 includes a valve seat 140 and a valve core 141, the valve seat is fixed in the first pressure regulating cavity, an elastic diaphragm 142 is arranged in the valve seat, the valve core is fixed on the elastic diaphragm, a pressure limiting spring 143 is arranged between the lower end of the valve core and the lower end of the valve seat, an oil outlet pipe 141 is arranged in the center of the upper end of the valve seat 140, the upper end of the oil outlet pipe extends into the second pressure regulating cavity, the upper end of the valve core 141 is abutted against the lower end of the oil outlet pipe, and an oil inlet 144 communicated with the first port; the valve core 141 comprises a valve core seat 1410 and a valve core body 1411, wherein a spherical pit 145 is arranged at the upper end of the valve core seat 1410, a counter bore 146 is arranged at the center of the spherical pit, the valve core body is spherical, a sealing plane 147 abutted against the lower end of the oil outlet pipe is arranged at the upper end of the valve core body 1411, the valve core body is arranged in the spherical pit, a limiting necking for preventing the valve core body from falling off is arranged at the opening end of the spherical pit, and a second pressure spring 148 is arranged in the counter bore; a sealing ring 149 is arranged between the oil outlet pipe and the second pressure regulating cavity, and a sealing ring is arranged between the valve seat and the first pressure regulating cavity.
With the attached drawings, the principle of the utility model is as follows: the oil storage box is arranged in the oil tank, and the oil outlet joint and the oil return joint are connected with an oil supply pipeline of the engine; the fuel pump body works, the fuel in the fuel storage box sequentially passes through the fuel pump body, the fuel inlet pipe and the fuel outlet connector to enter an engine pipeline, the redundant fuel passes through the oil return connector, the oil return pipe, the automatic pressure regulator and the injection nozzle to enter the fuel storage box, and the pressure limiting valve is used for keeping the oil pressure in the oil return pipe so as to meet the rated oil pressure required in the engine pipeline; the oil pressure of the fuel oil discharged from the pressure limiting valve is larger (the oil pressure is larger, if the fuel oil is directly discharged into the oil storage box), then when the fuel oil passes through the second pressure regulating cavity, the fuel oil overcomes the pressure of the first pressure spring and jacks up the piston, a part of the fuel oil flows into the oil storage box from the overflow port to be decompressed, the other part of the fuel oil enters the bottom of the oil storage box from the injection nozzle, the injection nozzle brings the fuel oil in the oil tank into the oil storage box, and at the moment, the oil pressure at the injection nozzle is reduced, so that the oil residue and impurities at the bottom of the oil tank are prevented from being stirred and lifted up to block a filter screen in an oil; and simultaneously reduces the noise in the oil tank.
The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made on the basis of the present invention to solve the same technical problems and achieve the same technical effects are all covered by the protection scope of the present invention.
Claims (5)
1. An electric fuel pump assembly structure comprises an oil storage box, a fuel pump body and a flange cover, wherein the flange cover is connected with the oil storage box through a connecting rod, an oil outlet joint and an oil return joint are arranged on the flange cover, the fuel pump body is connected with the oil outlet joint through an oil inlet pipe, the oil return joint is connected with an injection nozzle at the bottom of the oil storage box through an oil return pipe, and the electric fuel pump assembly structure is characterized in that an automatic pressure regulator is arranged at the upper end inside the oil storage box and comprises a pressure regulator shell, a first interface and a second interface are arranged at the upper end of the pressure regulator shell, the upper ends of the first interface and the second interface are connected into the oil return pipe, a first pressure regulating cavity and a second pressure regulating cavity are sequentially arranged in the pressure regulator shell from bottom to top, the upper end of the first pressure regulating cavity is communicated with the lower end of the second pressure regulating cavity, the lower end of the first interface is communicated with the side surface of the upper end of the, the lower end of the second interface is communicated with the side surface of the upper end of the second pressure regulating cavity, and a pressure limiting valve is arranged in the first pressure regulating cavity; the side of pressure regulator casing is equipped with the overflow seat, the inner of overflow seat is through the side intercommunication in water conservancy diversion hole and second pressure regulating chamber, the outer end of overflow seat is equipped with the end cover, is equipped with the piston in the overflow seat, be equipped with first pressure spring between piston and the end cover, the side of overflow seat is equipped with the overflow mouth with the oil storage box intercommunication.
2. The electric fuel pump assembly structure as claimed in claim 1, wherein the pressure limiting valve includes a valve seat and a valve core, the valve seat is fixed in the first pressure regulating cavity, an elastic diaphragm is arranged in the valve seat, the valve core is fixed on the elastic diaphragm, a pressure limiting spring is arranged between the lower end of the valve core and the lower end of the valve seat, an oil outlet pipe is arranged in the center of the upper end of the valve seat, the upper end of the oil outlet pipe extends into the second pressure regulating cavity, the upper end of the valve core is abutted against the lower end of the oil outlet pipe, and an oil inlet hole communicated with the first connector is arranged at the upper end of the valve seat.
3. The electric fuel pump assembly structure of claim 2, wherein the valve core comprises a valve core seat and a valve core body, a spherical pit is arranged at the upper end of the valve core seat, a counter bore is arranged at the center of the spherical pit, the valve core body is spherical, a sealing plane abutted against the lower end of the oil outlet pipe is arranged at the upper end of the valve core body, the valve core body is arranged in the spherical pit, a limiting necking for preventing the valve core body from falling off is arranged at the open end of the spherical pit, and a second pressure spring is arranged in the counter bore.
4. The electric fuel pump assembly structure of claim 3, wherein a seal ring is disposed between the outlet pipe and the second pressure regulating cavity, and a seal ring is disposed between the valve seat and the first pressure regulating cavity.
5. The electric fuel pump assembly structure of claim 1, wherein an arc-shaped groove is formed in an outer side wall of the fuel storage box, a sliding sleeve is fixed in the arc-shaped groove, a lower end of the connecting rod is slidably connected with the sliding sleeve, a limiting projection is arranged at an end portion of the lower end of the connecting rod, and a third pressure spring is sleeved outside the connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921599566.5U CN210686160U (en) | 2019-09-24 | 2019-09-24 | Electric fuel pump assembly structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921599566.5U CN210686160U (en) | 2019-09-24 | 2019-09-24 | Electric fuel pump assembly structure |
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| Publication Number | Publication Date |
|---|---|
| CN210686160U true CN210686160U (en) | 2020-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921599566.5U Active CN210686160U (en) | 2019-09-24 | 2019-09-24 | Electric fuel pump assembly structure |
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| CN (1) | CN210686160U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469438A (en) * | 2019-09-24 | 2019-11-19 | 江西大乘汽车工业有限公司 | A kind of electric fuel pump assembly structure |
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2019
- 2019-09-24 CN CN201921599566.5U patent/CN210686160U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110469438A (en) * | 2019-09-24 | 2019-11-19 | 江西大乘汽车工业有限公司 | A kind of electric fuel pump assembly structure |
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