CN115111208B - Mixing tube blank, mixing tube receiving device, suction jet pump and method for producing the same - Google Patents
Mixing tube blank, mixing tube receiving device, suction jet pump and method for producing the same Download PDFInfo
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- CN115111208B CN115111208B CN202210060192.XA CN202210060192A CN115111208B CN 115111208 B CN115111208 B CN 115111208B CN 202210060192 A CN202210060192 A CN 202210060192A CN 115111208 B CN115111208 B CN 115111208B
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- mixing tube
- receiving device
- blank
- mixing
- tube
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 239000012530 fluid Substances 0.000 claims abstract description 54
- 239000000446 fuel Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 22
- 230000008878 coupling Effects 0.000 claims description 12
- 238000010168 coupling process Methods 0.000 claims description 12
- 238000005859 coupling reaction Methods 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 6
- 238000003754 machining Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000001746 injection moulding Methods 0.000 description 9
- 238000007789 sealing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005304 joining Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 241000191291 Abies alba Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Classifications
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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
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/24—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing liquids, e.g. containing solids, or liquids and elastic fluids
-
- 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
-
- 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
- F02M37/02—Feeding by means of suction apparatus, e.g. by air flow through carburettors
- F02M37/025—Feeding by means of a liquid fuel-driven jet pump
-
- 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
- F02M37/12—Feeding by means of driven pumps fluid-driven, e.g. by compressed combustion-air
-
- 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
-
- 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
- F04F5/463—Arrangements of nozzles with provisions for mixing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention relates to a method for producing a mixing tube (3) for a suction jet pump (1) of a fuel delivery device, comprising the following steps: providing a mixing tube blank (24) having a mixing tube channel (25) which is formed through the mixing tube blank (24) and which extends from a first opening to a second opening (6, 20) of the mixing tube blank (24), and having a nozzle (11) which forms a section of the mixing tube channel (25) and has a predetermined outflow position (12) which closes off the nozzle (11) in fluid terms, such that the mixing tube channel (25) is interrupted in fluid terms; an outlet cross section (23) is produced at a predetermined outflow point (12) by means of laser perforation, so that the first opening (20) is fluidically connected to the second opening (6) of the mixing tube (3) via a mixing tube channel (25). The invention further relates to a mixing tube blank, a mixing tube receiving device for receiving a mixing tube and a suction jet pump.
Description
Technical Field
The present invention relates to a mixing tube blank, a mixing tube for a suction jet pump, and a method for producing the same.
The invention further relates to a mixing tube receiving device for a suction jet pump and to a method for producing the same. The invention also relates to a suction jet pump and a method for the production thereof.
Background
WO 2016/146475 A1 discloses a suction jet pump for a fuel delivery device, which is arranged as a separate component in the bottom of a swirl pot of the fuel delivery device and has a mixing tube with a nozzle configured separately for this purpose.
The prior art devices are particularly disadvantageous in that the individual components of the suction jet pump have to be manufactured relatively cost-effectively and the assembly of the parts consists of a large number of assembly steps. Furthermore, the prior art devices lack flexibility in terms of their design, since the number of nozzle through-openings or interfaces for supplying fuel jets to the suction jet pump, for example, is defined from the beginning.
Disclosure of Invention
It is therefore an object of the present invention to provide a hybrid tube blank from which a hybrid tube can be manufactured. A further object is to provide a method for manufacturing a mixing tube from a mixing tube blank. Furthermore, the object of the invention is to provide a mixing tube receiving device for such a mixing tube and a method for producing a mixing tube receiving device of this kind. The object of the present invention is to provide a method for producing a suction jet pump and a suction jet pump which simplifies production and assembly and at the same time allows a high degree of flexibility in terms of its design.
The object in respect of the mixing blank is solved by providing a mixing blank for a suction jet pump of a fuel delivery device, the mixing blank having a mixing tube channel which is formed through the mixing blank and extends from a first opening to a second opening of the mixing blank, and the mixing blank having a nozzle which forms a section of the mixing tube channel and has a predetermined outflow position which closes the nozzle in fluid terms, such that the mixing tube channel is fluidly interrupted.
In other words, this design makes it possible to flexibly machine the dimensions of the outlet cross section at the predetermined outflow point after the production of the hybrid tube blank. For example, a large number of mixing tube blanks can be reserved in advance in order to be able to produce corresponding mixing tubes from these if the customer desires a suction jet pump with mixing tubes having predetermined outflow positions of different diameters. Within the scope of the invention, a mixing tube blank is understood to be a mixing tube which has not yet been manufactured, i.e. which has not yet been used.
In particular, the mixing tube blank is constructed such that only openings have to be machined at predetermined outflow points, whereby the first opening and the second opening of the mixing tube blank are fluidically connected and a mixing tube for the suction jet pump is produced from the mixing tube blank. In other words, only one method step is required, namely the processing of the outlet cross section at the predetermined outflow point, in order to produce a mixing tube from the mixing tube blank according to the invention.
It is particularly advantageous if a nozzle is arranged at the end of the mixing tube channel, which nozzle is associated with the first or second opening of the mixing tube blank. In other words, the mixing tube channel starts or ends with the nozzle. Since the predetermined outflow point is arranged in the region of the mixing tube channel which is accessible via the first or second opening of the mixing tube blank, the subsequent processing of the predetermined outflow point to form the outlet cross section is made particularly easy.
It is particularly advantageous if the hybrid tube blank is produced by or by an injection molding process. Thereby enabling manufacturing costs to be reduced while achieving high yields.
In a further embodiment, the mixing tube channel of the mixing tube blank is constructed straight, in other words without bending. The injection molding process can thus be carried out at low cost, since the required mold can be constructed relatively simply.
As an alternative to the straight design of the mixing tube channel of the mixing tube blank, it is conceivable that the mixing tube channel consists of two straight channel sections extending at an angle to one another. Although this increases the costs compared to a straight design of the mixing tube channel, it may be necessary and advantageous for achieving a particularly compact suction jet pump, depending on the installation space conditions.
In principle, it is particularly advantageous if the mixing tube blank is of integral design with the nozzle. In particular, the assembly or joining process required for producing the hybrid tube blank in the case of a multi-part hybrid tube blank is thereby dispensed with, so that the production costs can be kept correspondingly low.
It is also advantageous if the predetermined outflow point is arranged in a section of the mixing tube channel adjoining the suction opening of the mixing tube channel. The suction opening is advantageously configured such that it penetrates the wall of the mixing tube blank, so that fluid from the surroundings of the mixing tube channel can flow through the suction opening into the mixing tube channel. In particular, the hybrid tube blank has a plurality of suction openings. Preferably, the plurality of suction ports are uniformly arranged with respect to each other in the circumferential direction of the hybrid tube blank. It is furthermore advantageous if the at least one suction opening is arranged at a distance from both the first and the second opening of the mixing tube channel.
The mixing tube made of the mixing tube blank can be connected particularly easily to the mixing tube receptacle when the outer contour and/or the inner contour of the mixing tube blank is rotationally symmetrical or is rotationally symmetrical with the exception of the at least one suction opening. Furthermore, the complexity of the mould required for the injection moulding process for producing the hybrid tube blank can thereby also be significantly reduced.
It is furthermore advantageous if the outer contour, in particular the circumferential surface, of the mixing blank has a detent bulge or detent recess. Such a latching bulge or latching recess may be part of a latching connection for fastening a mixing tube made of a mixing tube blank with a mixing tube receiver. A particularly simple fastening connection is thereby provided. In this case, it is particularly advantageous if the latching projections are formed in a ring-shaped manner, in particular integrally with the mixing blank, on the outer contour of the mixing blank. In the case of a locking recess, it is particularly advantageous if the locking recess is configured as an annular groove in the outer contour of the mixing blank.
The mixing tube made of the mixing tube blank is particularly easy to assemble with the mixing tube receiving means when the outer contour of the mixing tube blank has a shoulder. The introduction of such a mixing tube into a mixing tube receptacle provided for this purpose can be limited by such a shoulder, for example, because the outer contour of the shoulder is used as an assembly stop. The shoulder is preferably formed in a ring shape, in particular integrally with the mixing tube blank, on the outer contour of the mixing tube blank.
It is particularly advantageous if the outer contour and/or the inner contour of the hybrid tube blank is free of side recesses/undercuts from the first opening in the direction of the second opening and from the second opening in the direction of the first opening, except for the at least one suction opening. In this way, a hybrid tube blank can be produced with particularly simple molding for the injection molding process. In this case, only additional slides or machining of the hybrid tube blank after the injection molding process are required in order to form at least one suction opening.
A preferred embodiment of the invention is characterized in that the hybrid tube blank has a first end on the end side, at which a first opening is arranged, and the hybrid tube blank has a second end on the end side, at which a second opening is arranged, at which an annular groove or ridge is formed, which extends in the direction of extension of the hybrid tube blank. Such an annular groove or bulge can be part of a positive-locking connection of the coupling between the mixing tube made of the mixing tube blank and the mixing tube receiving device.
It is also advantageous if the mixing tube channel has an end section extending to the second end of the mixing tube and a flow cross section that increases in the direction of the second end of the mixing tube. By means of the flow cross section which increases in the direction of the second end of the mixing tube, the flow velocity is reduced on the one hand and on the other hand a better mixing of the fuel jet flowing through the nozzle with the suction flow sucked in through the suction opening is ensured.
The object relating to a method for producing a mixing tube for a suction jet pump of a fuel delivery device is achieved by providing a mixing tube blank according to the invention, by machining an outlet cross section at a predetermined outflow position by means of laser perforation, such that a first opening is fluidically connected to a second opening of the mixing tube via a mixing tube channel. Due to the fluid connection between the first opening and the second opening according to the method, a mixing tube is formed from the mixing tube blank. Furthermore, the Bernoulli effect (Bernoulli-Effekt) is based on such that a negative pressure can be generated by the fluid flowing through the mixing tube channel and thus through the nozzle, by means of which a fluid flow can be sucked through the suction opening.
It is particularly advantageous if the processed outlet cross section has a maximum diameter of at most 0.5mm, in particular at most 0.3mm. The advantage of processing the outlet cross section by means of laser perforation is that a particularly small diameter can be formed. At the same time, with the aid of laser perforation, a very large number/different outlet cross sections can be processed. In addition, no tools need to be changed during the transition from one diameter to another, which contributes to further flexibility during production. It is also important that the outlet cross section is provided with burr-free through openings by structuring the outlet cross section by means of laser perforation. In other manufacturing methods, such as drilling by means of a drill bit, unpredictable burrs will remain, which results in high flow losses, especially in case of small outlet cross sections, and greatly reduces the efficiency of the mixing tube or of a suction jet pump with such a mixing tube. Such burrs may also occur when the outlet cross section is formed by means of injection moulding. Typical diameters of the outlet cross-section processed by means of injection moulding are 0.5 to 4mm. Of course, such diameters can also be processed by means of laser perforation in order to form a burr-free outlet cross section.
The object with regard to providing a mixing tube for a suction jet pump is solved by providing a mixing tube produced according to the method for producing a mixing tube according to the invention.
The object in respect of providing a mixing tube receiving device for receiving a mixing tube for a suction jet pump is solved by providing a mixing tube receiving device for receiving a mixing tube according to the invention for a suction jet pump.
It is particularly advantageous if the mixing tube receptacle has at least two tube connections, each having a fluid line, wherein the fluid line of the first tube connection opens fluidically into the fluid collecting channel of the mixing tube receptacle, wherein the fluid line of the second tube connection is fluidically separated from the fluid collecting channel of the mixing tube receptacle by a predetermined opening position, and the fluid collecting channel extends to the mixing tube channel coupling. Thereby providing a hybrid tube receiving device with a usable tube fitting while retaining the option of using at least one additional tube fitting. In order to use the second pipe joint, only the predetermined opening position of the second pipe joint is required to be opened. It is particularly advantageous if the pipe connections each have a christmas tree-shaped contour/fishbone-shaped contour, in order to be able to connect the connecting lines to the pipe connections with great reliability.
It is furthermore particularly advantageous if the fluid collection channel is fluidically connected to the environment or to a further fluid line only via the mixing tube channel connection and the fluid line of the first tube connection, wherein the fluid collection channel is otherwise fluidically delimited by the mixing tube connection. This means that no separate sealing means are required, for example a ball sealing the fluid collection channel outwards.
A further embodiment of the invention is characterized in that the mixing tube receptacle has an annular elevation at the mixing tube channel connection, which can be introduced into the annular groove of the mixing tube according to the invention and thus can form a form-locking connection, or an annular groove at the mixing tube channel connection, into which the annular elevation of the mixing tube according to the invention can be introduced and thus can form a form-locking connection. Thereby reducing leakage at the coupling location between the mixing tube and the mixing tube receiving means. When a positive connection is established instead of a positive connection between the mixing tube and the mixing tube receiving device, leakage at the coupling location can be completely avoided.
It is particularly advantageous if the mixing tube receiving means are designed as one piece. It is particularly preferred that the mixing tube receiving means is made of plastic. In particular, the mixing tube receiving device can be produced by injection molding. Thereby enabling a high product quantity to be achieved at low cost.
It is also advantageous if the mixing tube receiving device has a receiving recess which forms a mixing tube receiving section which is configured in correspondence with the outer contour of the mixing tube according to the invention in order to receive the mixing tube. In other words, the receiving recess is configured as a cylindrical recess when the associated mixing tube has a cylindrical outer contour. The recess is also dimensioned according to the outer contour.
A preferred embodiment is characterized in that the mixing tube receiving section is arranged spaced apart from the mixing tube channel coupling opening and that the mixing tube receiving device has an intermediate space recess/clearance recess between the mixing tube receiving section and the mixing tube channel coupling opening, which intermediate space recess is not limited in at least one direction by the mixing tube receiving device. It is particularly preferred that the mixing tube received in the mixing tube receiving device according to the invention is configured and/or oriented in such a way that the suction opening of the mixing tube is located in the intermediate space recess and is oriented in particular in a direction which is not limited by the mixing tube receiving device.
It is furthermore advantageous if the mixing tube receiving section has a latching recess which is configured for forming a latching structure of the mixing tube in the mixing tube receiving device together with the latching bulge of the mixing tube according to the invention, or if the mixing tube receiving section has a latching bulge which is configured for forming a latching structure of the mixing tube in the mixing tube receiving device together with the latching recess of the mixing tube according to the invention. Thereby enabling the mixing tube to be fastened in the mixing tube receiving device without the need for a separate fastening process or fastening means, thus simplifying assembly and keeping costs low.
The object with regard to the method for producing a mixing tube receiver is achieved in that a mixing tube receiver according to the invention is provided and the predetermined opening position of the second pipe connection is opened, so that the fluid line of the second pipe connection is fluidically connected to the fluid collecting channel of the mixing tube receiver. Thus, the second coupling can be used with little, if any, cost. In other words, with this method, a mixing tube receiver with two available fluid lines is made from a mixing tube receiver with one fluid line and additional, optional fluid lines.
The object with respect to providing a mixing tube receptacle is solved by providing a mixing tube receptacle manufactured by the method for manufacturing a mixing tube receptacle according to the invention.
It is furthermore particularly advantageous if the fluid collection channel is fluidically connected to the environment or to a further fluid line only via the mixing tube channel connection and the fluid lines of the first and second tube connections, wherein the fluid collection channel is otherwise fluidically delimited by the mixing tube connection. This means that no separate sealing means are required, for example a ball sealing the fluid collection channel outwards.
The object with respect to providing a method for manufacturing a suction jet pump is solved by providing a mixing tube according to the invention, providing one of the mixing tube receptacles according to the invention, and engaging the mixing tube with the mixing tube receptacle. This provides a suction jet pump that can be used very flexibly, since not only the number of available pipe connections but also the outlet cross section can be configured or dimensioned as desired.
It is furthermore advantageous if the joining comprises introducing the mixing tube into the mixing tube receiving section and locking the mixing tube in a predetermined position in the mixing tube receiving section.
It is also advantageous if the mixing tube is connected to the mixing tube receiving device by means of a material-locking connection, and the material-locking connection is established by means of ultrasonic welding or friction spin welding. In this way, leakage between the mixing tube and the mixing tube receiving device can be prevented at low cost when a cohesive connection is formed at the fluid transition between the mixing tube channel and the fluid collecting channel.
The object with respect to providing a suction jet pump is solved by providing a suction jet pump manufactured by the method for manufacturing a suction jet pump according to the invention.
Advantageous developments of the invention are described in the dependent claims and in the following description of the figures.
Drawings
The invention will be described in detail below with reference to examples of embodiments in conjunction with the accompanying drawings. In these figures:
fig. 1 shows a suction jet pump;
fig. 2 shows a cross-sectional view of a suction jet pump; and
fig. 3 shows a detailed view of a cross-sectional view.
Detailed Description
Fig. 1 shows a suction jet pump 1 having a mixing tube receptacle 2 in which a mixing tube 3 is received. Furthermore, the suction jet pump has a first and a second pipe connection 4, 5. The mixing tube 3 has an opening 6 facing away from the mixing tube receiving means 2.
Fig. 2 shows a section through the suction jet pump 1 shown in fig. 1 with the mixing tube receptacle 2 and the mixing tube 3, which section extends along the mixing tube channel 25 and the fluid collecting channel 10 of the mixing tube 3 and along two fluid lines 8, 9, which are arranged in the two pipe connections 4, 5, respectively. The two pipe connections 4, 5 each have a christmas tree-shaped contour 7 for securely connecting the fluid hose to the pipe connection 4, 5. The fluid line 9 of the second pipe connection 5 has a predetermined opening position which separates the fluid line 9 of the second pipe connection 5 from the fluid collecting channel 10 in terms of fluid and can be broken through without effort if required, i.e. when the fluid line 9 of the second pipe connection 5 is required. This can be achieved by machining or by means of laser perforation. The mixing tube 3 has a nozzle 11 which is formed integrally with the mixing tube by injection molding. In this view, the nozzle has an outlet cross section 23 which is constructed by means of laser perforation. The laser perforation for the formation of the outlet cross section 23 takes place before the mixing tube 3 is spliced with the mixing tube receiver 2. The mixing tube is still a tube blank 24 as long as the outlet cross section 23 has not been constructed at the predetermined opening position 12 of the nozzle 11. The mixing tube 3 furthermore has a suction opening 13, through which fluid outside the suction jet pump can be sucked into the mixing tube channel 25. The pumping effect is based on the bernoulli effect. Furthermore, the mixing tube 3 has a specific shoulder 14 on its outer contour, which limits the displacement of the mixing tube 3 in the mixing tube receiving section 21. The shoulder 14 can also be used to ensure that the mixing tube 3 occupies a predetermined position in the mixing tube receiver 2 during assembly. The mixing tube 3 is fixed by means of the latching elevations 15 and latching recesses 16 between the outer contour of the mixing tube 3 and the inner contour of the recess of the mixing tube receiving section 21, in which the mixing tube 3 is received.
Fig. 3 shows a detailed view of the cross-sectional view shown in fig. 2. It can be seen that the nozzle 11 forms a first opening 20 of the mixing tube 3. The fluid collection channel 10 has a mixing channel connection 19, through which the fluid collection channel 10 opens into a mixing channel 25 via a first opening 20 of the mixing tube 3. At the end of the mixing tube 3 at the end face of the first opening 20 of the mixing tube 3, a form-locking connection is formed between the mixing tube 3 and the mixing tube receptacle 2 by means of the annular elevation 17 and the complementary annular groove 18. Alternatively, a material-locking connection may be provided instead of a form-locking connection in order to prevent leakage at this location. In the embodiment shown here, in which the outer contour of the mixing tube 3 is rotationally symmetrical with the exception of the suction opening, a material-locking connection can be produced by friction spin welding at the location of the form-locking connection 17, 18. For this purpose, both the mixing tube 3 and the mixing tube receiver 2 are composed of plastic. For the friction spin welding method, the mixing tube 3 is spliced with the mixing tube receptacle 2 and rotated until a corresponding, material-locking connection is formed between the mixing tube 3 and the mixing tube receptacle 2 as a result of thermal evolution.
List of reference numerals:
1. suction jet pump
2. Mixing tube receiving device
3. Mixing tube
4. First pipe joint
5. Second pipe joint
6. Second opening of mixing tube or tube blank
7. Christmas tree profile
8. Fluid pipeline of first pipe joint
9. Fluid pipeline of second pipe joint
10. Fluid collecting channel
11. Nozzle
12. Predetermined outflow position
13. Suction port
14. Shoulder
15. Latch bump
16. Latch recess
17. Annular ridge
18. Annular groove
19. Mixing tube channel coupling port
20. First opening of mixing tube or mixing tube blank
21. Mixing tube receiving section
22. Predetermined opening position of second pipe joint
23. Outlet cross section
24. Mixed tube blank
25. Mixing tube channel
Claims (24)
1. A mixing tube blank (24) for a suction jet pump (1) of a fuel delivery device, said mixing tube blank having
A mixing tube channel (25) which is formed in a manner penetrating the mixing tube blank (24) and extends from the first opening (20) to the second opening (6) of the mixing tube blank (24),
and
-a nozzle (11) forming a section of the mixing tube channel (25) and having a predetermined outflow position (12) which closes the nozzle (11) in fluid terms, such that the mixing tube channel (25) is interrupted in fluid terms.
2. The hybrid tube billet (24) according to claim 1, wherein the hybrid tube billet (24) is constructed in one piece with the nozzle (11).
3. A hybrid tube billet (24) according to any of the preceding claims, wherein the predetermined outflow position (12) is arranged in a section of the hybrid tube channel (25) adjoining the suction port (13) of the hybrid tube channel (25).
4. A hybrid tube billet (24) according to claim 3, characterised in that the outer contour and/or the inner contour of the hybrid tube billet (24) is constructed rotationally symmetrically except for the at least one suction opening (13).
5. The mixing tube blank (24) according to claim 1 or 2, characterized in that the outer contour of the mixing tube blank (24) has a latching bulge (15) or a latching recess (16).
6. The hybrid tube blank (24) according to claim 1 or 2, characterized in that the outer contour of the hybrid tube blank (24) has a shoulder (14).
7. The hybrid tube blank (24) according to claim 1 or 2, characterized in that the hybrid tube blank (24) has a first end of the end side, at which the first opening (20) is arranged, and a second end of the end side, at which the second opening (6) is arranged, at which the first end of the end side an annular groove (18) or bulge (17) is formed, which extends in the direction of extension of the hybrid tube blank (24).
8. The mixing tube blank (24) according to claim 7, characterized in that the mixing tube channel (25) has an end section extending to the second end of the mixing tube blank (24) and a flow cross section that increases in the direction of the second end of the mixing tube blank (24).
9. A method for manufacturing a mixing tube (3) for a suction jet pump (1) of a fuel delivery device, the method comprising the steps of:
-providing a hybrid tube blank (24) according to any of the preceding claims,
-machining an outlet cross section (23) at a predetermined outflow location (12) by means of laser perforation, whereby the first opening (20) is fluidly connected to the second opening (6) of the mixing tube (3) through a mixing tube channel (25).
10. A method according to claim 9, characterized in that the maximum diameter of the processed outlet cross section (23) is 0.5mm.
11. A mixing tube (3) for a suction jet pump (1), the mixing tube being manufactured by the method according to claim 9 or 10.
12. Mixing tube receiving device (2) for a suction jet pump (1) for receiving a mixing tube (3) according to claim 11.
13. Mixing tube receiving device (2) according to claim 12, characterized in that the mixing tube receiving device (2) has at least two tube connections (4, 5) with fluid lines (8, 9), respectively, the fluid line (8) of the first tube connection (4) leading fluidically into the fluid collecting channel (10) of the mixing tube receiving device (2), the fluid line (9) of the second tube connection (5) being fluidically separated from the fluid collecting channel (10) of the mixing tube receiving device (2) by a predetermined opening position (22), and
the fluid collection channel (10) extends to a mixing tube channel connection (19).
14. Mixing tube receiving device (2) according to claim 13, characterized in that the mixing tube receiving device (2) has an annular elevation (17) at the mixing tube channel coupling (19), which can be introduced into an annular groove (18) of the mixing tube (3) according to claim 11 and thus can form a form-locking connection, or an annular groove (18) is formed at the mixing tube channel coupling (19), into which the annular elevation (17) of the mixing tube (3) according to claim 11 can be introduced and thus can form a form-locking connection.
15. Mixing tube receiving device (2) according to any one of claims 12 to 14, wherein the mixing tube receiving device (2) is designed in one piece.
16. Mixing tube receiving device (2) according to claim 12, characterized in that the mixing tube receiving device (2) has a receiving recess forming a mixing tube receiving section (21) which is configured corresponding to the outer contour of the mixing tube (3) in order to receive the mixing tube.
17. Mixing tube receiving device (2) according to claim 16, wherein the mixing tube receiving section (21) is arranged spaced apart from the mixing tube channel coupling (19), the mixing tube receiving device (2) having an intermediate space recess between the mixing tube receiving section (21) and the mixing tube channel coupling (19), which intermediate space recess is not limited in at least one direction by the mixing tube receiving device (2).
18. Mixing tube receiving device (2) according to claim 16 or 17, characterized in that the mixing tube receiving section (21) has a latching recess (16) which is configured to form a latching structure of the mixing tube (3) in the mixing tube receiving device (2) together with a latching bulge (15) of the mixing tube (3) according to claim 11, or
The mixing tube receiving section (21) has a latching bulge (15) which is configured to form a latching structure of the mixing tube (3) in the mixing tube receiving device (2) together with a latching recess (16) of the mixing tube (3) according to claim 11.
19. Method for manufacturing a mixing tube receiving device (2), characterized in that a mixing tube receiving device (2) according to any one of claims 12 to 18 is provided, wherein a predetermined opening position (22) of the second tube connection (5) is opened, so that the fluid line (9) of the second tube connection (5) is fluidically connected to the fluid collecting channel (10) of the mixing tube receiving device (2).
20. A mixing tube receiving device (2) manufactured by the method according to claim 19.
21. A method for manufacturing a suction jet pump (1), the method comprising the steps of:
-providing a mixing tube (3) according to claim 11,
-providing a mixing tube receiving device (2) according to any one of claims 12 to 18 and 20,
-engaging the mixing tube (3) with the mixing tube receiving means (2).
22. Method according to claim 21, characterized in that the engagement comprises introducing the mixing tube (3) into the mixing tube receiving section (21) and here latching the mixing tube (3) in a predetermined position in the mixing tube receiving device (2).
23. Method according to any one of claims 21 to 22, characterized in that the mixing tube (3) is connected to the mixing tube receiving device (2) by means of a material-locking connection, which is established by means of ultrasonic welding or friction spin welding.
24. A suction jet pump (1) manufactured by a method according to any one of claims 21 to 23.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021202671.0A DE102021202671A1 (en) | 2021-03-18 | 2021-03-18 | Mixing tube blank, mixing tube, mixing tube holder, ejector pump and method for their manufacture |
| DE102021202671.0 | 2021-03-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115111208A CN115111208A (en) | 2022-09-27 |
| CN115111208B true CN115111208B (en) | 2024-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210060192.XA Active CN115111208B (en) | 2021-03-18 | 2022-01-19 | Mixing tube blank, mixing tube receiving device, suction jet pump and method for producing the same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115111208B (en) |
| DE (1) | DE102021202671A1 (en) |
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2021
- 2021-03-18 DE DE102021202671.0A patent/DE102021202671A1/en active Pending
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| CN1503880A (en) * | 2001-04-21 | 2004-06-09 | 西门子公司 | Ejector pump and a method for producing a nozzle for an ejector pump |
| DE102013011371A1 (en) * | 2013-07-09 | 2015-01-15 | Daimler Ag | Suction jet pump, in particular for a fuel delivery device |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN115111208A (en) | 2022-09-27 |
| DE102021202671A1 (en) | 2022-09-22 |
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