CN114542343A - Double-ejector pump, single-ejector pump and fuel supply system - Google Patents
Double-ejector pump, single-ejector pump and fuel supply system Download PDFInfo
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- CN114542343A CN114542343A CN202011347761.6A CN202011347761A CN114542343A CN 114542343 A CN114542343 A CN 114542343A CN 202011347761 A CN202011347761 A CN 202011347761A CN 114542343 A CN114542343 A CN 114542343A
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- 239000000446 fuel Substances 0.000 title claims abstract description 31
- 239000003380 propellant Substances 0.000 claims abstract description 20
- 230000002093 peripheral effect Effects 0.000 claims abstract description 14
- 238000009792 diffusion process Methods 0.000 claims abstract description 11
- 230000009977 dual effect Effects 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 14
- 239000010959 steel Substances 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000005336 cracking Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000002828 fuel tank Substances 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000001141 propulsive effect Effects 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Images
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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
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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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
- F04F5/46—Arrangements of nozzles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
- F04F5/46—Arrangements of nozzles
- F04F5/466—Arrangements of nozzles with a plurality of nozzles arranged in parallel
Abstract
The present invention relates to a jet pump in which a jet nozzle is formed separately from a pump housing, the pump housing is further formed with a cylindrical nozzle mounting portion located between a propellant medium passage and a suction passage, and the nozzle can reach and be locked to the nozzle mounting portion through a diffusion section and a mixing section. And a main ejector pump and an auxiliary ejector pump which are integrally connected in parallel in a pump shell to form a common propelling medium passage are used as the ejector pumps. Each main ejector pump and vice ejector pump still include respectively: a cylindrical main nozzle fitting part between the propellant medium passage and the main chamber side suction passage, and a cylindrical sub-nozzle fitting part between the propellant medium passage and the sub-chamber side suction passage for fixing a main nozzle and a sub-nozzle formed separately from the pump housing, the main nozzle and the sub-nozzle being fitted in the main nozzle fitting part and the sub-nozzle fitting part, respectively, in a form-fitting manner by outer peripheral portions thereof. The invention also relates to a single jet pump and a fuel supply system.
Description
Technical Field
The invention relates to an ejector pump, in particular to a double-ejector pump integrating a main ejector pump and an auxiliary ejector pump, a single-ejector pump and a fuel supply system with the single-ejector pump.
Background
Ejector pumps, also called jet pumps, which use a liquid with a certain pressure as a working liquid to eject or suck a liquid with a relatively low or no pressure, are widely used in various fluid devices, for example, in fuel supply systems of automobiles to eject fuel at the bottom of a fuel tank.
In automotive fuel tank applications, the jet pump is typically associated with an oil pump for pumping fuel from the tank to the engine. In particular, the jet pump is arranged at the bottom of the tank, receives pressurized fuel as a working fluid from the pump branch or return line, and pumps the fuel at the bottom of the tank to the pump or to a reservoir where the pump is located, whereby the fuel can be pumped by the pump also when the level of the fuel in the tank, i.e. the level of the fuel, is low. In particular, in certain types of vehicles, for example of the four-wheel drive type, the tanks are generally saddle-shaped tanks comprising a main tank and a secondary tank. For such tanks, a jet pump is generally arranged in both the main tank and the secondary tank. In addition, the conventional ejector pump is generally formed by injection molding.
Patent document 1(CN206770296U) discloses an ejector pump, and as shown in fig. 1, the ejector pump 1 includes a pressure-sealed area 2, a propellant medium passage 3 near the pressure-sealed area 2, a propellant jet nozzle 4, an intake passage 5, and a mixing section 6 and a diffusing section 7 located downstream of the intake passage 5 in a fuel liquid flow direction, and the pressure-sealed area 2 includes a closure 2a and a holder 2b for holding the closure. The closure member is a spherical member such as a steel ball.
However, the above techniques face the following dilemma:
1. the existing main ejector pump and the auxiliary ejector pump need to block the process holes through press-fitting steel balls, the process of press-fitting the steel balls in a production line needs to monitor the press-fitting force and speed, and the press-fitting steel balls often cause the ejector pump shell to crack. And hot riveting and plugging are needed after the steel ball is pressed.
2. In the existing fuel pump, a main ejector pump and an auxiliary ejector pump are two independent assemblies, two sets of independent product molds are needed, and two independent production assemblies are needed.
3. At present, when the existing ejector pump is manufactured by the domestic mould level, the 0.4mm jet hole of the propelling jet nozzle 4 is difficult to manufacture.
4. The size of the jet pump nozzle has different applications, so that a plurality of jet pumps on the market are changed.
In order to solve one or more of the following problems:
1', high production cost: the steel ball needs to be pressed and mounted by a servo motor, and the steel ball needs to be plugged by hot riveting. Quality risk: the steel pressing balls are easy to crack.
2', high production cost: two sets of moulds and two sets of production.
3', multiple specifications and troublesome material management.
4', the injection hole with the aperture grade of 0.4mm is difficult to realize in the prior art, and the application of the injection pump is limited.
In view of the above, a new design is urgently needed.
Disclosure of Invention
In order to solve the technical problems, the applicant has made keen innovation, and the applicant recognizes that the nozzle with the aperture grade of 0.4mm, which can be independently processed, can be used for replacing the spraying holes integrally formed in the pump housing, so that the process of pressing the steel balls can be eliminated, the production cost is reduced, and the cracking risk is reduced. So, through making the nozzle into independent part, can realize 0.4 mm's mould processing at home, if have different applications later on simultaneously, as long as alternate the nozzle, can keep drawing and penetrate the pump casing unchangeably.
Furthermore, a double-injection pump design integrating a main injection pump and an auxiliary injection pump can be adopted, so that the investment of a mould can be reduced, and the technical problem can be solved correspondingly.
More specifically, the present invention provides a dual ejector pump, characterized in that a main ejector pump and an auxiliary ejector pump, which share a propulsion medium passage, are integrally formed in parallel in a pump housing, and the main ejector pump further includes: a main chamber side intake passage, a main chamber side mixing section, a main chamber side diffusion section, and a cylindrical main nozzle assembly located between the propellant medium passage and the main chamber side intake passage; the auxiliary ejector pump further comprises: an auxiliary chamber side suction passage, an auxiliary chamber side mixing section, an auxiliary chamber side diffusion section, and a cylindrical auxiliary nozzle fitting portion fixed between the propulsion medium passage and the auxiliary chamber side suction passage, the main jet pump further including: a main nozzle formed separately from the pump housing and fixed to the main nozzle mounting part, the main nozzle being mounted in the main nozzle mounting part by an outer peripheral portion thereof in a form-fitting manner, and the auxiliary jet pump further comprising: and a sub-nozzle formed separately from the pump housing and fixed to the sub-nozzle mounting portion, the sub-nozzle being mounted in the sub-nozzle mounting portion by an outer peripheral portion thereof in a shape-fitting manner.
Thereby, the flow path of the main jet pump is formed as follows: when the propulsive jet flows out of the main nozzle through the propulsive medium passage, the propulsive jet flows are mixed with the fuel from the main chamber side suction passage in the main chamber side mixing section and then are sent out through the main chamber side diffusion section, and the flow path of the auxiliary jet pump is formed as follows: when the propellant jet is ejected from the sub-nozzle through the propellant medium passage, the propellant jet is mixed with the fuel from the sub-chamber-side intake passage in the sub-chamber-side mixing section, and then is sent out through the sub-chamber-side diffusion section.
In a preferred aspect, the main nozzle is capable of reaching the main nozzle assembly through the main chamber-side diffusion section and the main chamber-side mixing section,
the secondary nozzle is capable of reaching the secondary nozzle mount through the secondary chamber-side diffusion section and the secondary chamber-side mixing section.
In a preferred aspect, the main nozzle and the sub-nozzle are interference-fitted in the main-nozzle fitting part and the sub-nozzle fitting part, respectively.
In a preferred embodiment, the main nozzle and/or the secondary nozzle are each formed with a rib on the side facing away from the respective nozzle opening (30), by means of which rib a correspondingly formed latching groove on the pump housing can be latched.
In a preferred aspect, the main nozzle and the sub-nozzle are each formed with a flange on a side close to the nozzle, by which a shoulder portion formed on the main nozzle fitting portion and the sub-nozzle fitting portion can be stopped.
In a preferred aspect, the main nozzle and the sub-nozzle are respectively formed with beads on the nozzle side than the flange, for holding a mounting jig to send the main nozzle and the sub-nozzle to the main nozzle fitting part and the sub-nozzle fitting part, respectively.
In one preferred embodiment, the rib position may be urged by the mounting jig via a shape engagement so that the main nozzle and the sub-nozzle are rotated by a predetermined angle with respect to the pump housing, respectively, and the rib is locked to the locking groove.
In one preferred embodiment, the pump housing has a projection formed on the main nozzle mounting portion and the sub nozzle mounting portion on a side farther from the propellant medium passage than the shoulder portion, and the projection is engaged in a groove formed on a peripheral surface of the flange when the rib is engaged with the engaging groove.
The present invention also provides an ejector pump, wherein: the fuel pump is characterized in that the propellant jet nozzle is formed separately from the pump housing, the pump housing is further formed with a cylindrical nozzle fitting portion located between the propellant medium passage and the suction passage, and the propellant jet nozzle can reach and be locked to the nozzle fitting portion through the diffuser section and the mixing section.
The invention also provides a fuel supply system comprising a tank for containing fuel, and the above-described dual jet pump or the above-described jet pump associated with a fuel pump housed in the tank.
According to the technical scheme of the invention, the process of pressing the steel balls can be omitted, the production cost is reduced, and the cracking risk is reduced. The main ejector pump and the auxiliary ejector pump are integrated into a pump shell, so that the investment of a mold can be reduced. Particularly, the nozzle is made into an independent part, the die machining of 0.4mm can be realized at home, and meanwhile, if different applications exist in the future, the ejector pump shell is kept unchanged as long as the nozzle is changed.
Drawings
The invention will be described in more detail below with reference to the schematic drawings. The drawings and the corresponding embodiments are for purposes of illustration only and are not intended to be limiting of the invention. Wherein:
fig. 1 is a schematic structural diagram of a conventional ejector pump.
Fig. 2 is an external view of a double jet pump to which the embodiment of the present invention is applied.
FIG. 3 illustrates a cross-sectional view of a dual jet pump according to an embodiment of the present invention.
Fig. 4 shows an external view of the dual jet pump of fig. 3 before assembly.
FIG. 5 shows a cross-sectional view of a jet pump according to an embodiment of the invention.
FIG. 6 illustrates a perspective view of a nozzle in accordance with an embodiment of the present invention.
Fig. 7 shows a perspective view of a dual jet pump according to an embodiment of the invention.
Detailed Description
Exemplary embodiments of the present invention are described in detail below. The exemplary embodiments described below and illustrated in the figures are intended to teach the principles of the present invention and enable one skilled in the art to implement and use the invention in several different environments and for several different applications. Accordingly, the exemplary embodiments are not intended to, and should not be considered as, limiting the scope of the invention.
[ Overall Structure of double Ejection Pump ]
FIG. 2 illustrates a cross-sectional view of one embodiment of a dual jet pump 12 according to the present invention. For simplification of the drawing, the reserve tank is omitted from illustration. The driving liquid with a certain pressure is supplied to the double jet pump 12 via the jet pump driving hose 11. The secondary fuel tank suction pipe 13 is also connected to the dual jet pump 12.
More specifically, as shown in fig. 3, the dual jet pump 12 includes a main jet pump 121 and a sub-jet pump 122 that are generally integrated. The main ejector pump 121 and the sub ejector pump 122 share the propulsion medium passage 14, and share one pump housing 13 by being integrated.
In the direction of the streams 43, 341, the main jet pump 121 further comprises: the main chamber side thrust jet nozzle 31, the main chamber side suction passage 34 communicating with the tank main chamber side, the mixing section 161 and the diffusing section 171 located on the downstream side of the suction passage 34 in the flow direction.
In the direction of the streams 43, 241, the secondary jet pump 122 further includes: the jet nozzle 21 on the sub-chamber side, the suction passage 24 on the sub-chamber side communicating with the sub-tank suction pipe 13 on the sub-tank chamber side, the mixing section 162 and the diffusing section 172 on the downstream side of the suction passage 24 in the flow direction.
As can be seen, the main ejector pump 121 and the sub ejector pump 122 are configured in a parallel type in the liquid flow direction. Wherein, the main ejector pump 121 of one side that links to each other with the oil tank main chamber's function lies in: drawing fuel in the main tank into the storage barrel as shown by fuel flow 341 in the main tank chamber; the function of the secondary ejector pump 122 on the side connected to the secondary chamber of the oil tank is: fuel in the secondary tank is drawn into the storage barrel as shown by fuel flow 241 in the secondary tank chamber.
In this embodiment, the nozzles 21, 31 are formed separately from the pump housing 13. Negative pressure is formed by installing the nozzles 21 and 31, so that a desired injection function is realized. Moreover, the conventional pressure-tight area comprising a closure, for example a steel ball, and a holder for holding the closure is omitted.
[ NOZZLE AND MOUNTING STRUCTURE ] FOR INJECTION OF LIQUID
Fig. 4 shows an external view of the dual jet pump of fig. 3 before assembly. Where the nozzles 21, 31 and the pump housing 13 are made by injection moulding independently of each other, the nozzles 21, 31 may have similar constructions and possibly identical specifications, depending on the application. In particular, the nozzles 21 and 31 have uniform outer diameters, and can be uniformly mounted and applied in the pump housing 13 even if the inner diameters are different.
Specific nozzle configurations and their assembly are described below with reference to fig. 3-7.
Taking the nozzle 21 as an example, as shown in fig. 6, the nozzle is formed in a hollow structure, and a rib 26, a flange 33, a cylindrical body 311, a cylindrical body 321, and ribs 28 and 29 are formed on the nozzle opening 30 side. As shown, the ribs 26 may be attached to the nozzle end and flange 33 in a direction intersecting the flange 33 to increase rigidity.
The assembly process can be generally divided into four stages, the nozzle pre-assembly state (fig. 4); the nozzle 21 is fed into the jet nozzle 22 of the jet pump by means of a clamp matching the rib 16, passes through the diffuser section 172 and the mixing section 162, and finally reaches the mounting portion 18, and is positioned in the clamping groove 181 by means of rotary mounting.
The fitting portion 18 is integrally provided on the inner wall of the passage of the pump housing 13, is interposed between the propellant medium passage 14 and the sub-chamber side suction passage 24, and has a shape corresponding to the outer peripheral side of the nozzle 21 by interference fit.
Thereby, the main and sub-nozzles can be fitted in the main and sub-nozzle fitting portions in a form-fitting manner through the outer peripheral portions thereof. Here, the outer peripheral portion includes ribs 28 and 29, a flange 33, and a bead 26, which will be described later, in addition to the outer peripheral portion of the nozzle 21 that fits the fitting portion 18.
A shoulder portion 182 is formed on one side of the fitting portion 18 as a stopper of the flange 33, and a projection 184 (about 0.1mm to 0.2mm projecting from an inner wall surface at the fitting portion 18 of the pump housing 13) is formed on the fitting portion 18 on the side of the shoulder portion 182 closer to the spout 30 to fit in one of the grooves 27 formed on the nozzle flange 33.
A catch 181 (shown in figure 7 to engage with the ribs 28, 29) is formed on the other side of the mounting portion 18 remote from the spout 30.
Thus, when the nozzle 21 reaches the fitting portion 18 and the flange 33 is stopped by the shoulder portion 182 and cannot be further pushed in, it is indicated that the nozzle 21 has been fitted into the stop position along the catch 181, and then the rib portion 16 is urged by the above-mentioned jig so that the nozzle 21 is rotated, for example, by 90 °, and the barbed ribs 28, 29 on the nozzle 21 and the catch projection 181 in the pump housing 13 are engaged with each other.
The construction and assembly described herein is equally applicable to the main ejector side with the nozzle 31.
In the length of the fitting length at the fitting portion 18, the nozzles 21 and 31 and the pump housing 13 are fitted by interference fit to ensure a certain sealing performance.
It is easy for a person skilled in the art to ensure the dimensions of the section of the pump housing 13 where the nozzles 21, 31 are fitted, since here they are integrally formed in the mould and the roundness of the product is easily ensured.
After the rotational assembly, the nozzles 21, 31 are not detached from the pump housing 13.
The advantages of the swivel assembly over the conventional resilient snap assembly are:
1. the elastic snap-in has a risk of breakage during assembly.
2. The components are rigidly connected, the size is guaranteed well, and no allowance is needed in the assembling process.
Although the nozzle is installed in place, the nozzle cannot be forced in the rotating direction; the nozzle and the pump housing are in interference fit, and the pump housing has a certain holding force on the nozzle, so that the nozzle has little risk of falling off, however, in the embodiment, it is preferable that a protrusion 184(284) (with a height of about 0.1mm to 0.2mm) is further provided on the pump housing 13 to be correspondingly engaged with the groove 27 on the nozzle flange 33. That is, at the end of the nozzle spin-fitting, the protrusions are hard-pressed into the recesses. This is also easily achieved because of the plastic part and the small height of the protrusions. This further improves the reliability of locking.
The rib 26 on the nozzle is used for positioning on the clamp to ensure that the nozzles 21 and 31 can enter the clamping groove. This achieves easy and reliable operability with a simple structure.
As described above, according to the structure of the present invention, the integrated structure can be easily manufactured by injection molding, and the arrangement of steel balls, fabrication holes, etc. and the potential technical problems thereof in the prior art are avoided. The steel ball and the hose are saved, meanwhile, the installation is saved, and the quality risk of cracking is avoided.
Moreover, by adopting the adaptive nozzle, the nozzle with the aperture grade of 0.4mm can be easily realized, the fluid application range of the oil pump is expanded, the pressure can be maintained, and the platform management can be realized without a plurality of variant products.
[ Ejection Pump/Single Ejection Pump ]
Although the above description mainly takes the double jet pump 12 including the main jet pump 121 and the sub-jet pump 122 which are integrated as a whole as an example, it goes without saying that the present invention may be modified to a so-called single jet pump which is an jet pump formed by only one of the main jet pump 121 and the sub-jet pump 122, and various advantages such as the omission of steel balls, rotational mounting, easy nozzle fitting, and the like may be correspondingly achieved.
[ Fuel supply System ]
The single-double ejector pump according to the invention may be adapted to a fuel supply system comprising a tank for containing fuel associated with a fuel pump housed in the tank, said tank being a saddle-shaped tank comprising a main tank and a secondary tank.
It should be noted that the above description is only exemplary, and that various modifications and variations of the embodiments of the present invention can be made by those skilled in the art based on the above description, and are within the scope of the present invention.
Claims (10)
1. A dual ejector pump (12), characterized in that a main ejector pump (121) and an auxiliary ejector pump (122) that share a propulsion medium passage (14) are integrally formed in parallel in a pump housing (13), the main ejector pump (121) further comprising: a main chamber-side suction passage (34), a main chamber-side mixing section (161), a main chamber-side diffusion section (171), and a cylindrical main nozzle fitting (19) located between the propellant medium passage (14) and the main chamber-side suction passage (34); the sub jet pump (122) further includes: a sub-chamber-side suction passage (24), a sub-chamber-side mixing section (162), a sub-chamber-side diffusion section (172), and a cylindrical sub-nozzle fitting part (18) fixed between the propellant medium passage (14) and the sub-chamber-side suction passage (24),
the main ejector pump (121) further includes: a main nozzle (31) formed separately from the pump housing (13), fixed to the main nozzle fitting section (19), the main nozzle (31) being fitted in the main nozzle fitting section (19) in a form-fitting manner by an outer peripheral portion thereof, and
the sub jet pump (122) further includes: and a sub-nozzle (21) that is formed separately from the pump housing (13) and is fixed to the sub-nozzle fitting section (18), wherein the sub-nozzle (21) is fitted in the sub-nozzle fitting section (18) in a form-fitting manner by an outer peripheral portion thereof.
2. The dual ejector pump of claim 1,
the main nozzle (31) and the sub-nozzle (21) are fitted in the main nozzle fitting section (19) and the sub-nozzle fitting section (18) by interference fit, respectively.
3. The dual ejector pump of claim 1 or 2,
the main nozzle (31) being capable of reaching the main nozzle fitting (19) through the main chamber-side diffusion section (171) and the main chamber-side mixing section (161),
the secondary nozzle (21) can reach the secondary nozzle mount (18) via the secondary chamber-side diffusion section (172) and the secondary chamber-side mixing section (162).
4. The dual ejector pump of claim 1 or 2,
the outer peripheral portions of the main nozzle (31) and the sub-nozzle (21) each further include a rib (28, 29) formed on a side away from the respective nozzle (30), and the rib can be engaged with a corresponding engaging groove (181) formed in the pump housing (13).
5. The dual jet pump of claim 4,
the outer peripheral portions of the main nozzle (31) and the sub-nozzle (21) further include a flange (33) formed on a side close to the nozzle (30), respectively, and a shoulder portion (182) formed on the main nozzle fitting portion (19) and the sub-nozzle fitting portion (18) can be stopped by means of the flange (33).
6. The dual ejector pump of claim 5,
the outer peripheral portions of the main nozzle (31) and the sub-nozzle (21) further include a rib (26) formed on a side closer to the nozzle (30) than the flange (33), respectively, for holding a mounting jig to send the main nozzle (31) and the sub-nozzle (21) to the main nozzle fitting section (19) and the sub-nozzle fitting section (18), respectively.
7. The dual ejector pump of claim 6,
the rib position can be biased by the mounting jig via shape engagement, so that the main nozzle (31) and the sub-nozzle (21) are rotated by a predetermined angle with respect to the pump housing (13), respectively, and the rib (28) is locked to the locking groove (181).
8. The dual ejector pump of claim 6,
a projection (184) is formed on the main nozzle mounting part (19) and the sub-nozzle mounting part (18) of the pump housing (13) on a side farther from the propellant medium passage (14) than the shoulder part (182), and when the rib (28) is locked in the locking groove (181), the projection (184) is locked in a groove (27) formed on the peripheral surface of the flange (33).
9. A single jet pump has a pump casing (13) in which: a propellant medium passage (14), a propellant jet nozzle (21, 31), an intake passage (24, 34), and a mixing section (161, 162) and a diffuser section (171, 172) downstream of the intake passage (24, 34) in the direction of flow of the fuel liquid,
it is characterized in that the preparation method is characterized in that,
the jet propulsion nozzles (21, 31) are formed separately from the pump housing (13),
the pump housing (13) is further formed with tubular nozzle fitting portions (18, 19) located between the propulsion medium passage (14) and the suction passages (24, 34),
the propellant jet nozzles (21, 31) can reach and be locked in the nozzle mounting sections (18, 19) by means of the diffuser sections (171, 172) and the mixing sections (161, 162).
10. A fuel supply system comprising a tank for containing fuel and a dual jet pump according to any one of claims 1 to 8 or a single jet pump according to claim 9 associated with an oil pump housed in the tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011347761.6A CN114542343A (en) | 2020-11-26 | 2020-11-26 | Double-ejector pump, single-ejector pump and fuel supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011347761.6A CN114542343A (en) | 2020-11-26 | 2020-11-26 | Double-ejector pump, single-ejector pump and fuel supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114542343A true CN114542343A (en) | 2022-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011347761.6A Pending CN114542343A (en) | 2020-11-26 | 2020-11-26 | Double-ejector pump, single-ejector pump and fuel supply system |
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| CN (1) | CN114542343A (en) |
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| CN206636848U (en) * | 2017-04-06 | 2017-11-14 | 泰兴市热工仪表厂 | A kind of antidetonation jet pump |
| US20190154062A1 (en) * | 2017-11-20 | 2019-05-23 | Robert Bosch Llc | Vehicle Fuel Pump Module including Improved Jet Pump Assembly |
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