CN117386541A - Dual-redundancy electric fuel pump - Google Patents
Dual-redundancy electric fuel pump Download PDFInfo
- Publication number
- CN117386541A CN117386541A CN202311689408.XA CN202311689408A CN117386541A CN 117386541 A CN117386541 A CN 117386541A CN 202311689408 A CN202311689408 A CN 202311689408A CN 117386541 A CN117386541 A CN 117386541A
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- wall
- pump
- electric
- electric pump
- box
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- 239000000446 fuel Substances 0.000 title claims abstract description 64
- 229920000742 Cotton Polymers 0.000 claims abstract description 11
- 230000035939 shock Effects 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims description 13
- 230000009977 dual effect Effects 0.000 claims description 12
- 230000017525 heat dissipation Effects 0.000 claims description 12
- 230000005855 radiation Effects 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 2
- 230000003028 elevating effect Effects 0.000 claims 2
- 238000013016 damping Methods 0.000 claims 1
- 230000007423 decrease Effects 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 49
- 241000219146 Gossypium Species 0.000 description 8
- 239000000295 fuel oil Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 230000007774 longterm Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/08—Feeding by means of driven pumps electrically driven
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/04—Combinations of two or more pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/001—Noise damping
- F04B53/002—Noise damping by encapsulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/001—Noise damping
- F04B53/003—Noise damping by damping supports
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/08—Cooling; Heating; Preventing freezing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention provides a dual-redundancy electric fuel pump, and relates to the technical field of electric fuel pumps. The dual-redundancy electric fuel pump comprises a first electric pump, a second electric pump and an outer box, wherein the outer box consists of an upper box and a bottom box which are distributed up and down. According to the invention, a double-pump structure is adopted, a flow path is communicated by using a four-way pipe, two groups of one-way valves are matched, the fault tolerance and the system reliability are improved, the temperature inside the outer box is detected by the temperature sensor, the temperature of the pump is reduced by flowing fuel, when the temperature sensor detects that the temperature inside the outer box exceeds a threshold value, the inner part of the outer box is forcedly radiated by two groups of fans, the fixed frame absorbs the shock by the first buffer pad and the second buffer pad, the inner side wall of the outer box is fully covered with sound absorbing cotton, and meanwhile, the two pumps are respectively connected with the oil outlet and the oil inlet by a group of hoses, so that the vibration generated during the operation of the pump can be reduced, and the outward transmission of working noise is reduced.
Description
Technical Field
The invention relates to the technical field of electric fuel pumps, in particular to a dual-redundancy electric fuel pump.
Background
An electric fuel pump is a device that continuously draws fuel from a tank to provide a specified pressure and flow of fuel to a fuel system. The fuel pump has the basic working principle that a rotor in a pump shell is driven to rotate at a high speed after a direct current motor is electrified, and a tangent plane at the lower end of a rotor shaft is combined with an inner hole tangent plane of an impeller, so that the impeller is driven to rotate in the same direction through the rotor shaft when the rotor rotates, vacuum low pressure is caused at an oil inlet part in the high-speed rotation process of the impeller, and then fuel oil subjected to filtration treatment is sucked from an oil inlet of a pump cover, and the sucked fuel oil enters the pump shell after being pressurized by a fuel pump impeller and is extruded out through an oil outlet, so that fuel oil with certain pressure is provided for a fuel oil system. The electric fuel pump is higher in general pressure, widely applied to the fields of automobiles, aviation and the like, has higher requirements on comprehensive performance, and more public technologies are available on the market to mention the electric fuel pump, such as a multifunctional protection type electric fuel pump, belongs to the field of electric fuel pumps, and solves the problem that the traditional electric fuel pump is easy to damage due to the fact that impurities are inhaled. This electronic fuel pump includes the electronic fuel pump body, the one end of electronic fuel pump body be equipped with into oil pipe, the intraductal activity of advance to peg graft there is a filter screen section of thick bamboo, filter screen section of thick bamboo one end be equipped with the spacing ring, advance oil pipe on be equipped with a plurality of elastic component that are used for anti-limit ring that pushes up, advance oil pipe outer wall seted up the external screw thread, the external screw thread on connect soon and be used for compressing tightly the screw thread sleeve of spacing ring, screw thread sleeve center be equipped with the inlet port, screw thread sleeve outer wall be equipped with be used for with the oil tank play oil pipe connection's joint boss. The utility model provides a multi-functional protection type electric fuel pump that mentions in this disclosed technology can prevent effectively that impurity from directly getting into electric fuel pump, guarantee the continuous operation of electric fuel pump, say the electric fuel pump of open again, including pump case, pump head part, back lid subassembly, install motor part and the pump body part in the pump case, pump head part includes the pump cover of plastic materials and is fixed in the positive and negative pole inserted sheet on the pump cover, positive and negative pole inserted sheet runs through the pump cover up-and-down terminal surface, positive and negative pole inserted sheet is equipped with the sealing ring with the fixed cover of the lower half outer fringe of pump cover meeting part, the lower extreme of sealing ring leaves the pump cover terminal surface a certain distance down, positive and negative pole inserted sheet, sealing ring and pump cover integrative injection moulding. The technology can solve the problem that fuel oil in the oil pump leaks outwards from the surface of the anode and cathode inserting piece, and ensure driving safety;
however, in the prior art including the above-mentioned disclosed technology, the electric fuel pump has certain defects, on one hand, because the use situation of the electric fuel pump is relatively special, on the other hand, compared with the traditional mechanical fuel pump, the aspects of the electric fuel pump are more complex, the existing single-body electric fuel pump is difficult to ensure long-term stable operation under the condition of high pressure, and once the electric fuel pump fails, the whole associated system cannot operate, therefore, the electric fuel pump needs to be optimized and improved to ensure long-term stable operation.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the double-redundancy electric fuel pump, which solves the problems that in the prior art, the electric fuel pump has certain defects, on one hand, the use scene of the electric fuel pump is special, on the other hand, compared with the traditional mechanical fuel pump, the aspects of the electric fuel pump are more complex, the traditional single-body electric fuel pump is difficult to ensure long-term stable operation under the condition of high pressure, and the whole associated system cannot operate once the electric fuel pump fails.
Technical proposal
In order to achieve the above purpose, the invention is realized by the following technical scheme: the utility model provides a dual redundancy electric fuel pump, includes first electric pump, second electric pump and outer case, the outer case comprises last case, the base case that is upper and lower distribution, the outer case inside wall is provided with the sound absorbing structure that is used for making an uproar that falls, base case inboard lower wall fixedly connected with mount, be provided with the shock-absorbing structure that is used for the shock attenuation between mount and the base case inboard lower wall, the mount is left and right sides two-layer riser and upper and lower two-layer baffle constitution, first electric pump, second electric pump are according to the upper and lower distribution respectively fixed connection at the two-layer baffle upper wall of mount, base case right wall is supreme and lower fixedly connected with oil inlet, oil-out in proper order, oil inlet, oil-out all run through base case right wall towards the one end of base case and all stretch into to the base case inside, the oil inlet stretches into to the inside one end of base case through first three-way connection with first electric pump entry end fixed connection, the oil-out is through second three-way connection with second electric pump exit end fixed connection, between first electric pump exit end and the second electric pump entry end through the fourth three-way connection, the fourth electric pump exit end is kept away from to the fourth electric pump entry end through the fourth three-way connection, the fourth electric pump exit end and fourth three-way passageway, the fourth electric pump exit end and fourth electric pump entry end and fourth electric pump exit end and fourth passageway fixed connection in proper order, the electric pump exit end and the four-way, a group of one-way valves are respectively arranged between the first passage and the first three-way joint and between the fourth passage and the second three-way joint, and pressure detection structures for detecting pipeline pressure are arranged between the first three-way joint and the first electric pump and between the third passage and the second electric pump; the upper box upper wall is connected with the upper cover through the hinge rotation, one side fixedly connected with carrying handle of upper cover upper wall and being located away from the hinge, the inboard upper wall of upper cover is provided with the temperature detection structure that is used for detecting the inside temperature of outer case, the inner cover board of upper box lower wall fixedly connected with, inner cover board outer wall and base box inside wall sliding connection, base box front wall and back wall all are provided with the thermovent that link up with the base box upper mouth portion, inner cover board front wall and back wall all are provided with the thermovent that is used for the inside radiating of outer case, be provided with between base box, the upper box and be used for driving the lifting unit that the upper box rises and descends so that thermovent is inside and outside the alignment, the inboard upper wall of upper box just is close to the equal fixedly connected with cutting ferrule in four corners position, lifting unit passes through connector and joint all around, be provided with joint structure between connector and the cutting ferrule.
In order to avoid vibrations to the base box transmission that produce when first motor pump, second motor pump operation, preferably, shock-absorbing structure includes fixed foot, first blotter and second blotter, fixed foot fixed connection is at the inboard lower wall of base box, first blotter, second blotter set up respectively in the upper and lower both sides of mount lower floor baffle and about relative with fixed foot, through hexagon socket head cap screw locking between second blotter, mount, first blotter and the fixed foot.
In order to enable the oil way to smoothly run, preferably, the flow direction of the one-way valve between the first three-way joint and the first passage is from the first three-way joint to the first passage, the flow direction of the one-way valve between the second three-way joint and the fourth passage is from the fourth passage to the second three-way joint, the back pressure of the two groups of one-way valves is larger than the output pressure of the first electric pump and the second electric pump, and the forward opening pressure of the two groups of one-way valves is smaller than the output pressure of the first electric pump and the second electric pump.
In order to transmit the working states of the first electric pump and the second electric pump to the driving computer, preferably, the pressure detection structure comprises two groups of pressure sensors, the two groups of pressure sensors are respectively and fixedly connected between the first three-way joint and the inlet end of the first electric pump and between the third passage and the inlet end of the second electric pump, and the two groups of pressure sensors are respectively used for detecting the oil pressure of the inlet ends of the first electric pump and the second electric pump.
In order to monitor the temperature inside the outer box in real time, preferably, the temperature detection structure is a temperature sensor, and the temperature sensor is fixedly connected to the upper wall of the upper cover.
For the inside temperature of outer case reaches the inside alignment of heat radiation structure and thermovent when high-point threshold, preferably, lifting unit includes four sets of electric telescopic handle, four sets of electric telescopic handle is equal fixed connection at the inboard lower wall of base box and is close to the four corners position, four sets of electric telescopic handle all is located the inner side of inner cover board, connector fixed connection stretches out the axle tip at electric telescopic handle.
In order to keep the internal temperature of the outer box within a set range, preferably, the heat dissipation structure comprises two groups of fans, the two groups of fans are respectively and fixedly connected with the front wall and the rear wall of the inner cover plate, the two groups of fans are respectively opposite to the two groups of heat dissipation ports up and down, and the fans are positioned at the lower sides of the heat dissipation ports when the upper box and the bottom box are combined.
For the convenience when later maintenance separates upper box and electric telescopic handle, preferably, the joint structure includes joint hole, jackscrew, spring and bullet round pin, the joint hole sets up at the cutting ferrule lateral wall and link up with the cutting ferrule is inside, jackscrew, spring and bullet round pin set gradually at the connector inner wall with the mode of perpendicular to connector axle center, the one end that the spring was kept away from to the bullet round pin runs through the connector lateral wall and stretches out to the connector outside, the bullet round pin stretches out to the outside one end of connector and joint hole joint, through bullet round pin, joint hole joint between connector, the cutting ferrule.
In order to sufficiently eliminate noise generated when the first electric pump and the second electric pump are operated, it is preferable that the sound absorbing structure includes a plurality of sound absorbing cottons, and the plurality of sound absorbing cottons are sequentially disposed on an inner upper wall, an inner lower wall, an inner left wall, an inner right wall, an inner front wall, and an inner rear wall of the outer case.
In order that vibration is not transmitted outwards through the oil inlet and the oil outlet when the first electric pump and the second electric pump work, preferably, the oil inlet extends into the space between one end inside the bottom box and the first three-way joint and between the second three-way joint and the oil outlet through a group of hoses respectively.
Advantageous effects
The invention provides a dual-redundancy electric fuel pump. The beneficial effects are as follows:
compared with the prior art, the dual-redundancy electric fuel pump adopts a dual-pump structure, uses the four-way pipe to communicate a flow path and is matched with two groups of one-way valves, so that the reliability of the system is improved, the system can also operate normally under the condition of one pump failure, the fault tolerance rate is greatly improved, and the fuel flow path can also circulate normally under the condition that two pumps are damaged, thereby avoiding secondary damage caused by oil path blockage and greatly improving the safety.
Compared with the prior art, the double-redundancy electric fuel pump has the advantages that the upper limit value of the internal temperature of the outer box is set in the control part, the internal temperature of the outer box is detected through the temperature sensor, the first electric pump and the second electric pump are cooled through flowing fuel, when the temperature sensor detects that the internal temperature of the outer box exceeds a threshold value, the electric telescopic rod stretches out of the shaft to drive the upper box to lift up, so that the two groups of fans are opposite to the inside and the outside of the two groups of heat dissipation ports, and the forced heat dissipation is carried out inside the outer box through the operation mode that the two groups of fans absorb and blow.
Compared with the prior art, the dual-redundancy electric fuel pump has the advantages that the fixing frame is damped through the first cushion pad and the second cushion pad, the inner side wall of the outer box is fully covered with sound absorbing cotton, meanwhile, the two pumps are respectively connected with the oil outlet and the oil inlet through a group of hoses, and vibration and noise reduction generated during operation of the two pumps can be greatly reduced, and the noise is outwards transmitted.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of the connection structure of the upper cover, upper case and inner cover plate of the present invention;
FIG. 3 is a schematic partial cross-sectional view of the internal structure of the outer case of the present invention;
FIG. 4 is an enlarged view of a portion of the invention at A in FIG. 3;
FIG. 5 is a schematic view of a first passageway, a first three-way joint, and a one-way valve connection structure of the present invention;
FIG. 6 is a side partial cross-sectional view of the connector and ferrule connection structure of the present invention;
FIG. 7 is a partial cross-sectional view of the connecting structure of the fixing leg and the fixing frame of the present invention.
1, a bottom box; 2. loading the box; 3. an upper cover; 4. a pressure sensor; 5. a heat radiation port; 6. an inner cover plate; 7. an oil inlet; 8. an oil outlet; 9. a handle; 10. a fan; 11. a temperature sensor; 12. an electric telescopic rod; 13. a connector; 14. a cutting sleeve; 15. a fixed foot; 16. a first cushion pad; 17. a fixing frame; 18. a second cushion pad; 19. a first electric pump; 20. a second electric pump; 21. a hose; 22. a first three-way joint; 23. a second three-way joint; 24. a four-way pipe; 2401. a first passage; 2402. a second passage; 2403. a third passage; 2404. a fourth passage; 25. sound absorbing cotton; 26. a one-way valve; 27. a clamping hole; 28. a jackscrew; 29. a spring; 30. and (5) spring pins.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
As shown in fig. 1 to 7, the embodiment of the present invention provides a dual redundancy electric fuel pump, including a first electric pump 19, a second electric pump 20, and an outer casing, wherein the outer casing is composed of an upper casing 2 and a lower casing 1 which are vertically distributed, a sound absorbing structure for noise reduction is arranged on the inner side wall of the outer casing, a fixing frame 17 is fixedly connected to the inner side lower wall of the lower casing 1, a shock absorbing structure for shock absorption is arranged between the fixing frame 17 and the inner side lower wall of the lower casing 1, the shock absorbing structure includes a fixing foot 15, a first buffer cushion 16 and a second buffer cushion 18, the fixing foot 15 is fixedly connected to the inner side lower wall of the lower casing 1, the first buffer cushion 16 and the second buffer cushion 18 are respectively arranged on the upper side and lower side of a lower layer partition plate of the fixing frame 17 and are opposite to the fixing foot 15, the second buffer cushion 18, the fixing frame 17, the first buffer cushion 16 and the fixing foot 15 are locked by inner hexagon screws, and the first buffer cushion 19 and the second electric pump 20 mounted on the fixing frame 17 are enabled to transmit little shock to the lower casing 1 during operation, thereby reducing external noise;
the fixed frame 17 is composed of a left vertical plate, a right vertical plate, an upper baffle layer and a lower baffle layer, the first electric pump 19 and the second electric pump 20 are respectively and fixedly connected to the upper walls of the two baffle layers of the fixed frame 17 according to the up-down distribution, the right wall of the bottom box 1 is sequentially and fixedly connected with an oil inlet 7 and an oil outlet 8 from top to bottom, one ends of the oil inlet 7 and the oil outlet 8, which face the right wall of the bottom box 1, penetrate through the right wall of the bottom box 1 and extend into the bottom box 1, one end of the oil inlet 7, which extends into the bottom box 1, is fixedly connected with the inlet end of the first electric pump 19 through a first three-way joint 22, the oil outlet 8 is fixedly connected with the outlet end of the second electric pump 20 through a second three-way joint 23, the outlet end of the first electric pump 19 is connected with the inlet end of the second electric pump 20 through a four-way pipe 24, the side wall of the four-way pipe 24 is sequentially provided with a first passageway 2401, a second passageway 2402, a third passageway 2403 and a fourth passageway 2404 from top to bottom, the outlet end of the first electric pump 19 is fixedly connected with the four-way pipe 24 through a second passage 2402, the inlet end of the second electric pump 20 is fixedly connected with the four-way pipe 24 through a third passage 2403, the first three-way joint 22 is far away from the inlet end of the first electric pump 19, one end of the oil inlet 7 is fixedly connected with the four-way pipe 24 through a first passage 2401, the second three-way joint 23 is far away from the outlet end of the second electric pump 20, one end of the oil outlet 8 is fixedly connected with the four-way pipe 24 through a fourth passage 2404, a group of one-way valves 26 are respectively arranged between the first passage 2401 and the first three-way joint 22 and between the fourth passage 2404 and the second three-way joint 23, the one-way valves 26 between the first three-way joint 22 and the first passage 2401 are communicated from the first three-way joint 22 to the first passage 2401, the one-way valves 26 between the second three-way joint 23 and the fourth passage 2404 are communicated from the fourth passage 2404 to the second three-way joint 23, the back pressure of the two groups of check valves 26 is larger than the output pressure of the first electric pump 19 and the second electric pump 20, the forward opening pressure of the two groups of check valves 26 is smaller than the output pressure of the first electric pump 19 and the second electric pump 20, and by arranging the two groups of check valves 26 and matching with the four-way pipe 24, the smooth oil way can be kept when the first electric pump 19 or the second electric pump 20 breaks down and the first electric pump 19 and the second electric pump 20 break down;
the oil inlet 7 extends into the bottom box 1 and is connected with the first three-way joint 22 and the second three-way joint 23 and the oil outlet 8 through a group of hoses 21, and the hoses 21 are connected, so that vibration generated by the operation of the first electric pump 19 and the second electric pump 20 is reduced from being transmitted outwards from the oil outlet 8 and the oil inlet 7 to the greatest extent, and noise is reduced;
a pressure detection structure for detecting pipeline pressure is arranged between the first three-way joint 22 and the first electric pump 19 and between the third passage 2403 and the second electric pump 20, the pressure detection structure comprises two groups of pressure sensors 4, the two groups of pressure sensors 4 are respectively and fixedly connected between the first three-way joint 22 and the inlet end of the first electric pump 19 and between the third passage 2403 and the inlet end of the second electric pump 20, the two groups of pressure sensors 4 are respectively used for detecting oil pressure of the inlet ends of the first electric pump 19 and the second electric pump 20, the two groups of pressure sensors 4 are electrically connected with a control part, fault information can be timely transmitted to the control part when the first electric pump 19 and the second electric pump 20 break down, and when the first electric pump 19 and the second electric pump 20 are applied to a vehicle, the control part can be a driving computer of the vehicle, and the driving computer is not developed for the embodiment because the driving computer is a public technology;
the upper wall of the upper case 2 is rotationally connected with an upper cover 3 through a hinge, the upper wall of the upper cover 3 is fixedly connected with a carrying handle 9 at one side far away from the hinge, the upper wall of the inner side of the upper cover 3 is provided with a temperature detection structure for detecting the internal temperature of the outer case, the temperature detection structure is a temperature sensor 11, the temperature sensor 11 is fixedly connected with the upper wall of the upper cover 3, and when the first electric pump 19 and the second electric pump 20 work daily, heat is taken away through flowing fuel oil so as to cool, but high temperature still can be generated during long-term high-speed operation, and the internal temperature of the outer case is monitored through the temperature sensor 11 so as to provide temperature information at any time;
the lower wall of the upper box 2 is fixedly connected with an inner cover plate 6, the outer wall of the inner cover plate 6 is in sliding connection with the inner side wall of the bottom box 1, the front wall and the rear wall of the bottom box 1 are both provided with heat dissipation openings 5 communicated with the upper opening part of the bottom box 1, the front wall and the rear wall of the inner cover plate 6 are both provided with heat dissipation structures for dissipating heat in the outer box, the heat dissipation structures comprise two groups of fans 10, the two groups of fans 10 are respectively and fixedly connected with the front wall and the rear wall of the inner cover plate 6, the two groups of fans 10 are respectively opposite to the two groups of heat dissipation openings 5 up and down, the fans 10 are positioned at the lower side of the heat dissipation openings 5 when the upper box 2 is combined with the bottom box 1, under the condition of no high temperature, and when the inner part of the outer box needs to be cooled, the upper box 2 is driven to rise through a lifting assembly, so that the fans 10 are aligned with the heat dissipation openings 5, and the two groups of fans 10 can be started to cool the inner part of the outer box, and the two groups of fans 10 can be cooled one by one, and one fan 10 can be one by one, so that the purpose of rapid heat exchange can be achieved;
a lifting assembly for driving the upper case 2 to ascend and descend so as to align the heat radiation structure with the inside and the outside of the heat radiation opening 5 is arranged between the bottom case 1 and the upper case 2, the lifting assembly comprises four groups of electric telescopic rods 12, the four groups of electric telescopic rods 12 are fixedly connected to the lower wall of the inner side of the bottom case 1 and are close to four corners, the four groups of electric telescopic rods 12 are positioned on the inner side of the inner cover plate 6, a connector 13 is fixedly connected to the end part of an extending shaft of the electric telescopic rods 12, the upper case 2 and the bottom case 1 are combined together in daily work, and when the high temperature inside the outer case is met, the upper case 2 is driven to ascend through the electric telescopic rods 12 so that the fan 10 can be aligned with the inside and the outside of the heat radiation opening 5;
the upper wall of the inner side of the upper box 2 is fixedly connected with a clamping sleeve 14 at the position close to four corners, the lifting assembly is clamped with the clamping sleeve 14 through a surrounding connector 13, a clamping structure is arranged between the connector 13 and the clamping sleeve 14, the clamping structure comprises a clamping hole 27, a jackscrew 28, a spring 29 and a spring pin 30, the clamping hole 27 is arranged on the side wall of the clamping sleeve 14 and penetrates through the interior of the clamping sleeve 14, the jackscrew 28, the spring 29 and the spring pin 30 are sequentially arranged on the inner wall of the connector 13 in a mode perpendicular to the axis of the connector 13, one end of the spring pin 30, which is far away from the side wall of the connector 13, extends out of the connector 13, is clamped with the clamping hole 27, one end of the spring pin 30, which extends out of the connector 13, is clamped with the clamping hole 27, the connector 13 and the clamping sleeve 14 are clamped through the spring pin 30 and the clamping hole 27, and the electric telescopic rod 12 can drive the upper box 2 to move up and down through the clamping structure, and when the upper box 2 needs to be opened, the spring pin 30 is lifted up slightly with a force upwards to exit the clamping hole 27, and the upper box 2 can be taken down;
the sound absorbing structure comprises a plurality of sound absorbing cotton 25, wherein the sound absorbing cotton 25 is sequentially arranged on the inner upper wall, the inner lower wall, the inner left wall, the inner right wall, the inner front wall and the inner rear wall of the outer box, and the sound generated during working can be fully absorbed through the sound absorbing cotton 25.
Working principle: the second cushion pad 18, the fixing frame 17, the first cushion pad 16 and the fixing feet 15 are locked by inner hexagon screws, the first cushion pad 16 and the second cushion pad 18 enable the vibration to be transmitted to the bottom box 1 rarely when the first electric pump 19 and the second electric pump 20 mounted on the fixing frame 17 operate, so that external noise is reduced, by arranging two groups of one-way valves 26 and matching the four-way pipe 24, an oil way can be kept smooth when the first electric pump 19 or the second electric pump 20 fails and the first electric pump 19 and the second electric pump 20 fail, heat is taken away by flowing fuel oil when the first electric pump 19 and the second electric pump 20 work daily, cooling is performed, but high temperature still can be generated when the first electric pump and the second electric pump operate at high speed for a long time, the temperature information is provided at any time when the inner temperature of the outer box is monitored by the temperature sensor 11, and under the non-high temperature condition, when the temperature inside the outer box needs to be reduced, the upper box 2 is driven to be lifted by the lifting component, so that the fans 10 are aligned with the heat-dissipating openings 5, and then the two groups of fans 10 can be started to reduce the temperature inside the outer box, the two groups of fans 10 are preferably arranged in one-in-one-out mode, the aim of rapid heat exchange is achieved, the upper box 2 and the bottom box 1 are combined together in daily operation, when the high temperature inside the outer box is met, the upper box 2 is driven to be lifted by the electric telescopic rod 12, so that the fans 10 can be aligned with the inside and the outside of the heat-dissipating openings 5, the upper box 2 can be driven to be lifted up and down by the electric telescopic rod 12 through the clamping structure, and when the upper box 2 needs to be opened, the upper box 2 is lifted upwards slightly, the elastic pin 30 can be withdrawn from the clamping hole 27, the upper box 2 can be taken down, noise generated during sound absorption can be fully absorbed through the cotton 25, the noise can be connected through the hose 21, vibration generated by the operation of the first electric pump 19 and the second electric pump 20 can be reduced as much as possible, and the transmission from the oil outlet 8 and the oil inlet 7 is reduced, so that noise is reduced;
the dual-redundancy electric fuel pump has the following four working conditions when in use:
working condition one: the first electric pump 19 and the second electric pump 20 work normally, and the fuel flow direction is the oil inlet 7, the first electric pump 19, the second passage 2402, the four-way pipe 24, the third passage 2403, the second electric pump 20 and the oil outlet 8;
working condition II: when the first electric pump 19 fails and the second electric pump 20 works normally, the fuel flows to the oil inlet 7, the one-way valve 26, the first passage 2401, the four-way pipe 24, the third passage 2403, the second electric pump 20 and the oil outlet 8;
and (3) working condition III: the first electric pump 19 works normally, and the second electric pump 20 fails, so that the fuel flows to the oil inlet 7, the first electric pump 19, the second passage 2402, the four-way pipe 24, the fourth passage 2404, the one-way valve 26 and the oil outlet 8;
and (4) working condition four: if the first electric pump 19 and the second electric pump 20 are both failed, the fuel flows to the oil inlet 7, the one-way valve 26, the first passage 2401, the four-way pipe 24, the fourth passage 2404, the one-way valve 26 and the oil outlet 8;
the double-pump structure is adopted, the four-way pipe is used for communicating the flow paths, two groups of one-way valves are matched, the reliability of the system is improved, the system can normally operate under the condition that one pump fails, the fault tolerance rate is greatly improved, the fuel flow paths normally circulate under the condition that two pumps are damaged, the secondary damage caused by the blockage of the oil paths is avoided, and the safety is greatly improved.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides an electronic fuel pump of dual redundancy, includes first electric pump (19), second electric pump (20) and outer box, its characterized in that: the outer box comprises an upper box (2) and a bottom box (1) which are distributed up and down, the inner side wall of the outer box is provided with a sound absorbing structure used for reducing noise, a fixing frame (17) is fixedly connected with the inner side lower wall of the bottom box (1), a shock absorbing structure used for absorbing shock is arranged between the fixing frame (17) and the inner side lower wall of the bottom box (1), the fixing frame (17) comprises a left vertical plate, a right vertical plate and an upper baffle and a lower baffle, a first electric pump (19) and a second electric pump (20) are respectively and fixedly connected to the upper wall of the two layers of the fixing frame (17) according to the up-down distribution, an oil inlet (7) and an oil outlet (8) are sequentially and fixedly connected to the right wall of the bottom box (1) up-down, one end of the oil inlet (7) and the oil outlet (8) extend into the right wall of the bottom box (1) respectively, one end of the oil inlet (7) extending into the inside the bottom box (1) is connected with an inlet end of the first electric pump (19) through a first tee joint (22) and an inlet end of the first electric pump (19), the electric pump (20) is connected to an outlet (24) through a second tee joint (24) and an electric outlet (24) and an outlet (24024) are sequentially arranged between the electric pump and the inlet and the outlet (20) The pressure detection device comprises a second passage (2402), a third passage (2403) and a fourth passage (2404), wherein the outlet end of a first electric pump (19) is fixedly connected with a four-way pipe (24) through the second passage (2402), the inlet end of a second electric pump (20) is fixedly connected with the four-way pipe (24) through the third passage (2403), the first three-way joint (22) is far away from the inlet end of the first electric pump (19), one end of an oil inlet (7) is fixedly connected with the four-way pipe (24) through the first passage (2401), the second three-way joint (23) is far away from the outlet end of the second electric pump (20), one end of an oil outlet (8) is fixedly connected with the four-way pipe (24) through the fourth passage (2404), a group of one-way valves (26) are respectively arranged between the first passage (2401) and the first three-way joint (22) and between the fourth passage (2404) and the second three-way joint (23), and a pressure detection structure is arranged between the first three-way joint (22) and the third electric pump (19) and the third passage (3) for detecting the pressure of the second electric pump (20);
the upper box (2) upper wall is connected with upper cover (3) through the hinge rotation, one side fixedly connected with carrying handle (9) that upper cover (3) upper wall just is located and keeps away from the hinge, upper cover (3) inboard upper wall is provided with the temperature detection structure that is used for detecting outer incasement portion temperature, upper box (2) lower wall fixedly connected with inner cover board (6), inner cover board (6) outer wall and base box (1) inside wall sliding connection, base box (1) front wall and back wall all are provided with cooling hole (5) that link up with base box (1) upper mouth portion, inner cover board (6) front wall and back wall all are provided with the heat radiation structure who is used for external case inside heat dissipation, be provided with between base box (1), upper box (2) and be used for driving upper box (2) and rise and decline so that the heat radiation structure and the inside and outside elevating module who aligns of cooling hole (5), upper box (2) inboard upper wall just is close to four corners position all fixedly connected with cutting ferrule (14), elevating module passes through joint (13) and cutting ferrule (14) all around, be provided with between cutting ferrule (13) and cutting ferrule structure.
2. The dual redundancy electric fuel pump of claim 1, wherein: the damping structure comprises fixed feet (15), a first buffer pad (16) and a second buffer pad (18), wherein the fixed feet (15) are fixedly connected to the inner lower wall of the bottom box (1), the first buffer pad (16) and the second buffer pad (18) are respectively arranged on the upper side and the lower side of a lower layer of a partition plate of a fixing frame (17) and are vertically opposite to the fixed feet (15), and the second buffer pad (18), the fixing frame (17), the first buffer pad (16) and the fixed feet (15) are locked through inner hexagon screws.
3. The dual redundancy electric fuel pump of claim 2, wherein: the one-way valve (26) between the first three-way joint (22) and the first passage (2401) circulates in the direction from the first three-way joint (22) to the first passage (2401), the one-way valve (26) between the second three-way joint (23) and the fourth passage (2404) circulates in the direction from the fourth passage (2404) to the second three-way joint (23), the back pressure of two groups of one-way valves (26) is larger than the output pressure of the first electric pump (19) and the second electric pump (20), and the forward opening pressure of the two groups of one-way valves (26) is smaller than the output pressure of the first electric pump (19) and the second electric pump (20).
4. The dual redundancy electric fuel pump of claim 3, wherein: the pressure detection structure comprises two groups of pressure sensors (4), the two groups of pressure sensors (4) are respectively and fixedly connected between a first three-way joint (22) and the inlet end of a first electric pump (19) and between a third passage (2403) and the inlet end of a second electric pump (20), and the two groups of pressure sensors (4) are respectively used for detecting oil pressure of the inlet ends of the first electric pump (19) and the second electric pump (20).
5. The dual redundancy electric fuel pump of claim 4, wherein: the temperature detection structure is a temperature sensor (11), and the temperature sensor (11) is fixedly connected to the upper wall of the upper cover (3).
6. The dual redundancy electric fuel pump of claim 5, wherein: the lifting assembly comprises four groups of electric telescopic rods (12), the four groups of electric telescopic rods (12) are fixedly connected to the lower wall of the inner side of the bottom box (1) and close to four corners, the four groups of electric telescopic rods (12) are positioned on the inner side of the inner cover plate (6), and the connecting heads (13) are fixedly connected to the end parts of the extending shafts of the electric telescopic rods (12).
7. The dual redundancy electric fuel pump of claim 6, wherein: the heat radiation structure comprises two groups of fans (10), the two groups of fans (10) are respectively and fixedly connected with the front wall and the rear wall of the inner cover plate (6), the two groups of fans (10) are respectively opposite to the two groups of heat radiation ports (5) up and down, and the fans (10) are positioned at the lower sides of the heat radiation ports (5) when the upper box (2) and the bottom box (1) are combined.
8. The dual redundancy electric fuel pump of claim 7, wherein: the clamping structure comprises a clamping hole (27), a jackscrew (28), a spring (29) and a spring pin (30), wherein the clamping hole (27) is formed in the side wall of the clamping sleeve (14) and is communicated with the inside of the clamping sleeve (14), the jackscrew (28), the spring (29) and the spring pin (30) are sequentially arranged on the inner wall of the connecting head (13) in a mode perpendicular to the axis of the connecting head (13), one end of the spring pin (30) away from the spring (29) penetrates through the side wall of the connecting head (13) and extends out of the connecting head (13), one end of the spring pin (30) extending out of the connecting head (13) is clamped with the clamping hole (27), and the connecting head (13) and the clamping sleeve (14) are clamped through the spring pin (30) and the clamping hole (27).
9. The dual redundancy electric fuel pump of claim 8, wherein: the sound absorbing structure comprises a plurality of sound absorbing cotton (25), and the sound absorbing cotton (25) are sequentially arranged on the inner side upper wall, the inner side lower wall, the inner side left wall, the inner side right wall, the inner side front wall and the inner side rear wall of the outer box.
10. The dual redundancy electric fuel pump of claim 9, wherein: the oil inlet (7) extends into the bottom box (1) and is connected with the first three-way joint (22) and the second three-way joint (23) and the oil outlet (8) through a group of hoses (21) respectively.
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| CN202311689408.XA CN117386541B (en) | 2023-12-11 | 2023-12-11 | Dual-redundancy electric fuel pump |
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| CN202311689408.XA CN117386541B (en) | 2023-12-11 | 2023-12-11 | Dual-redundancy electric fuel pump |
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