DE1941882A1 - Device for generating a pulsating flow of liquid - Google Patents

Description

Gate direction to generate a pulsating flow of liquid

JtPUr the following application will take priority from the Swedish Registrations No. 11 4Q5 / 68 dated August 23, 1963 and No. 16 743/68 - of 6 December 1963 used.

The invention relates to a device for the induction of a pulsating flow of liquid _? What an indeterminate flow of a liquid is converted into a pulsating set of requirements that are placed on such a pulsating flow of liquid is that the impulses are pronounced and have the desired size Extent reaches "especially when it is a question of highly volatile liquids" When a highly volatile liquid flows through valves etc., small sas bubbles appear in the liquid which, depending on the pressure occurring, make them very compressible changeable pressure makes it impossible to have a pronounced impulse of the desired. Received size zn. Another disadvantage that occurs with the previously known devices of this type is the inability to deal with the liquid

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pynkt is required to ansupaosen. Bleas Torriekttmgö »arfcei ·» ', \ ten usually with full output, whereby the riveted T ^ xr-' used rope of the current is led back through a branch line provided with an overflow valve. This method is both uneconomical and disadvantageous for the expression the impulses. ■ ...

One area of application in which the aforementioned problems arise is a specific type of injection carburetor for internal combustion engines, in which the fuel is supplied to a injection nozzle at a pulsating pressure. Valve body set in 'Sang and maintained "A more detailed description of such a carburetor is given in German patent application P 14 76 163.3" It is important with these carburetors that the fuel is delivered to the injection nozzle in precisely defined and pronounced pulses. The problem, however, lies in the fact that, for example, the bsnsin is a volatile liquid and contains certain amounts of gaseous hydrocarbons in solution. still, especially if the liquid in narrow passages, as they occur in over- and ünterdruclcvQntileü is exposed to "a pressure drop, ba-.sonders if this range of valves are held by springs, \ v? Is he known so far is" These gas bubbles make the S ¹ IUssigkeit to varying degrees sitt susaimiiendrückljar which _ff dis

of the device adversely affected, which also affects that of the carburetor. You little quantitative adaptability, Ssrates to the "instantaneous .Bi'smistoffverbraucli affects in this context any case aiißorßt detrimental"Der'Mo-tor a Wagana requires one iBtaxiBiaie Brennatoffzufuiir only for a very small rope represents the total operating time of _a Accordingly, it It is uneconomical to charge the carburetor by means of such a device, which is continuously operated with ascimial capacity

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sitfit is in operation, with a maximum energy consumption, occurs · It is highly desirable that the motor consumes as little power as possible, especially if that is the case pulsating electricity generating device operated by an electric motor connected to the electrical system of the Tahreeuges connected·

It is an object of the present invention to provide an apparatus for generating a pulsating su SlÜesigkeitestromes which fulfills the above mentioned requirements, and a soft produces liquid stream consists of ten distinct from certain _M pulses of an optimal magnitude. The device according to the invention, which fulfills these conditions, is essentially characterized by the following parts: A piston, the end face of which forms the greater part of the wall of a chamber mounted in a housing, a one-way valve which has an inlet chamber on the inlet side of the Pulse »chamber, which is located on the outlet side, separates a feed line, which leads the liquid into the Bialasskammer, and a discharge line for the pulsating liquid from the impulse chamber and a drive device; which transmits a reciprocating movement to the piston, the valve body of the one-way valve being connected to the piston · i

The invention will now be described in more detail with reference to the accompanying drawings, wherein the figures 1 and 2 longitudinal sections of two different designs of the Device according to the invention for generating a pulsating 3 show the fluid current.

That device shown in Fig. 1 has a housing 1 with a Cylinder space 2 in which a piston. 3 movably attached Ibt. 33er Ko3.beu 3 has passages 4 in its longitudinal direction and a ring-shaped ■ recess 5, through which an inlet

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Kb Ilen 3 possesses a with It Oe ze löhnet φ Kolbsnetange 17 Consists of a fixed fil in the Kol "b9ii, which represents a bolt 18, and a driven rope in the Sbrm of a shock-ice 19 · Me Bolsen 18 and 19 stand by a resilient one Coupling 20 in connection with each other · This coupling consists of an auxiliary 21 through which the plunger 19 penetrates and a compression spring 22 *, which in this case is designed as a diaphragm spring the sleeve 21 engages, and a second abutment part 24, which strikes in the opposite position where the compression spring 22, which is the abutment part 24 and the abutment part 25 on the sleeve 21g is screwed onto a rope of the bolt 19 provided with a (! © winch), camouflaging to regulate the tension of the spring on the sleeve 21, wherein the disc rests against a stop 28 provided in the sleeve.

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During the alternating, reciprocating movement of the piston rod, the bushing XS is guided in a tube 29 and the sleeve 21 is guided in a bore 30, both bores being provided in the housing X. The free end of the Bolsene 19 carries an AnaehXagsehuh 3X ₉ which is connected to a drive device soXX "The Anaohlagaohuh can be adjusted with HiXf β an Stellamtter 32, which is screwed onto the Bolssen 19" The drive device consists of a Bxeenter 35 »which is shown in dashed lines. The eccentric is driven by a BXefctromotQr 33, the speed of which determines the frequency of the pulses from the device. Bine Büelchol spring 35 is provided for the return movement of the piston between the stop 36 on the bolt 18 and the stop in the housing X *

the inlet canister 6 is also a return clock from.laß 3β before » seen * which are explained in more detail below target.

Baa device is shown in that the outlet IS is connected to a fuel nozzle 39 in a Napritzvergaser dee $ ypa described in the aforementioned patent application. It need only be told hior "that the nozzle is provided with a valve body 40" which vibrates during the bee operated, the .Vergasers and öiner using spring 41 "dei * s voltage with the desired Sreibstoffluß changed through the nozzle ₉ can be kept in contact with its seat o Ba'-the nozzle is charged with a pulsating flow of liquid " ₉ wardon vibrations of the valve body are initiated and maintained di © are directed towards the Yentilsitz and from the dleaera, which results in atomization of the fuel results in · Among other things this® »& u achieve ·, ainduced liquid pulse impulses. *. which are pronounced and always of the same size, so that, on the one hand, the vibrations can be built up softly in the desired manner and, on the other hand, the current is continuous solely through the force «

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with which the valve body is determined against its site: rtioktY '. /

Ü && ih Flg. 1 a shown device works in the following manner ·.

• Bsr fuel, such as gasoline, is pumped from the fuel tank in the seal of the arrows shown in the drawing through the inlet T into the inlet chamber β. The fuel runs through the]> urohläase 4- ssu the one-way valve 9 * 12 · The piston 3 moves alternately forwards and backwards, with the piston being accelerated when moving backwards from the front-A whose dead center position due to the play around the bolt 14 from the valve body "9 until the bolt comes into contact with the wall of the opening. Bieseis play is exaggerated in the drawing and in reality only reaches a few tenths of a millimeter. The delay between the valve body behind the piston allows the valve disk to leave the valve disc, and allows the fuel to run into the Xapulskaimiier 15 « Wena the piston its has reached back dead center, "he sohl 0t calibration the valve because of the kinetic energy of the Yentilkörpers very sohneil _t and the piston begins its compression work process and presses a jet of a pulsating liquid out of the pulse chamber τ 15 through the outlet 16 "as shown by an arrow represented by a dashed line from the" consumer which in this 3? a3il die Injection nozzle 39 is »if a sufficiently sharp impulse and a low pressure loss are obtained» it is necessary ₉ that the ineffective Baröicii or the toto space in the ImpulkauHner is kept as small as possible so that the line to the "consumer" is as expensive as possible is "#the first condition is fulfilled by the fact that the-expanse." dar laiju ^ -skaiamer eats the same outer side of the cylinder and that its length is only -a, small, little more-than the-length of the stroke, so that the piston takes up almost the entire impulse. while he is in the front end position

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is located. In reality the game becomes the same before the piston »in this pail of the surface of the Yentllteller, and the wall of the impulse bucket only eisig® Hinderdel Miiimeter thick when the olb «a is in the upper part Dead position is located. The measure of the stroke changes, depending on full of the desired fuel flow and 'will automatically set according to the back pressure in the nozzle, vreloher TQa the Spanmmg of 3feder 41 depends.

Automatic adjustment of the stroke length as a function of the counter pressure in the impulse camera is achieved via the resilient coupling 20, which is provided on the piston rod. If% increases the back pressure, the plate spring is to do a gewiaeen & T & Q. susasmengepre & t, which depends on its tension and its characteristic curve. "The voltage can be adjusted with the help of the adjusting nut 26". *

The effect achieved by the derates according to the present invention can be further increased * Ground _P if the Gasblaeen which despite everything in the BinlaSkaramer because of the rapid. Movement of the piston, unavoidable leaks between the pulse chamber and the inlet chamber, etc. can occur with the fuel, which is continuously flushed through the inlet chamber and is returned via the feed line 38 in the direction of the arrow to the fuel container, where the gas bubble is cut off «In this way, the fuel is pumped in a flow that is circulated around the device in a much larger flow than the flow that is fed into the pulsating ibrm sum carburetor.

The AuafÜhr-ungGforCi erfindungsgemäfien the device which is illustrated in ilg _o 2, besitat a housing 101 with a Sylinderraum 102, in which a piston 103 movably mounted

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let. The piston is connected to the housing -tfbav eis, bswegglioligs X $ ia «phragma 304, which -firm, ea piston et al. In the housing there is a "ine lla" laB chamber 106, which one biala opening 10? In a passage 105 * which connects the cylinder surface and the cylinder block with one another, a valve body is provided which can move in axial direction with a certain amount of play. The valve body has a valve disk and a perforated plate 111. Bach a movement to seal the inlet chamber wiz & t the valve disk 110 with the valve seat 112 in the housing 101, while still moving in the opposite direction of the plate 111 see paragraph 115 sets. A beard 108 'which protrudes axially out of the piston 105 fits into a corresponding bore 114 in the valve body 109. The beard 108 is held in frictional contact with the wall of the bore 114 by a sleeve ring 121. is placed on this bolt · In this way a one-way valve 109, 112 is formed for the flow through the office passage 105, which separates the inlet chamber from the pulse chamber 115, and a cable of the cylinder space 105, which is located on the outside of the diaphragm 104. From the pulse chamber, an outlet 116 leads out "

The piston 105 has a piston rod _t that is generally designated 117 "She piston rod consists of a hUlsenfurmigen part 118 secured in the piston 1st, and a drive part in ^ ormeines Bolsens 119 · piping feile are by means of a resilient coupling 120 to each other connected «, this clutch is formed by the possibility of movement of the bolt 119 in the sleeve 118 and by the compression spring 122, which is designed as a disc spring in the embodiment shown. The bolt 119 has a stop 125 which is in a Hichtuag en * die. Sleeve 118 applies, while a further stop 124 is provided, which applies the opposite direction to the spring 122, which is provided between the stop 124 and a stop 125 on the sleeve 118.

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hen is. The tension of the loader is on the soleplate set, which is screwed onto the bears 110.

During the reciprocating movement of the piston rod, the sleeve 113 is guided in a bore 130 in the housing 101 * The free end of the bolt 119 is provided with an adjustable stop shoe 131 which is connected to a drive device. The drive consists of a bxsenter 133 which is shown in the drawing in dash-dotted lines. The eccentric is operated by a slectro motor 134 "whose speed determines the frequency of the device". Bine BUekholfeder swisohen 135 is a stop 136 ι on the sleeve 118 and a stopper 137 provided on the housing kil "mn the ™ recirculation dee piston facilitate su"

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3) The inlet chamber 106 is provided with a compensating device which is designed as a membrane 126 and which is guided transversely through the inside of the inlet carainer. A pressure plate 127 is provided on the Asx membrane * between which and the housing a spiral spring 128 is arranged * A safety guide 138 from the S inlet chamber is also provided.

In the drawing there is the device with its A ^ sIaS H ^ with a SinapritzdüBs 139 of a bi-fuel gasifier of the £ ypa mentioned above

Up to 3Pig <> 2 works in the following way:

Fuel is pumped from the fuel tank through the inlet 107, generally the inlet chamber 106, in accordance with the arrow shown in the drawing. Then the fuel is pumped through the passages in the perforated. Plate 111 tmd the passage 105 on the bi-directional valve 109, 112 passed. Be? Piston moves alternately forwards and backwards, with döx- £ ol-

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promotes until the plate 111 rests against the anchor 113. The play of the valve body is exaggerated in Zeish & ung « has been depicted and is actually only a part of it Fraction of the stroke length dos piston, for example about 0.2 aas with a stroke length of 0.8 mm * during the valve disc

110 leaves its seat 112, the fuel enters the impulse chamber 115, and when the piston reaches its rear end and turns, the valve closes very quickly as the valve body does. The piston is moved in the opposite direction to complete its Koffipreesienefltfb uad a liquid flow from the impulse chamber. 115 the outlet US, as indicated by the arrow shown in a broken line, presses out and the consumer ₃ in this Sail of the nozzle © 139> As for the other functions, so v? Ird ^! then taken Beaug, what next

. Above about the execution form according to Fig. I it was said '»"

In the release form according to Hg · 1, the valve is built into the cylinder, and the pressure loss that occurs when the fuel inlet is continued from the oil inlet can is very slight. This effect is achieved because the required energy is around the Yentilkörper to ba-due to this body by the piston partly _in dieae on the bolt which connects the two parts, and partly IRD via the valve seat in the piston exceeds "tragesi"? V / else the valve is snangeläufig by the piston controlled in the Gsgeneata to the conventional feature .of erfindungeganiäßen device is that the Yentilkonstruktio "described in a ^large,. ventilö'ffnung" results, Tifodurch the outset aufgeseigten problems Dissolved · dea, and "a" the Bruck of loss. "" encountered in other "tön versions _o

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It should be noted, however, that besides the two very level execution forms even further combinations are adjusted · So can β · Β. instead of a motor-driven eccentric, an electromagnetic drive should be provided «the old the piston rod is connected and the with a pulsating Electric current is never fed to this Way controls the frequency of the lying device.

0098Ό9 / Ί192

Claims (1)

If4iiÄf device ssur Brseugung a pulsating Flüeoiglceite-, romes, characterized by a piston (5 _f 103 ^ whose end face forms part of a chamber (15, 115) which is provided in a housing (I ₁ IQl), a one-way valve (9t 12 » 109 «112)» that on the inlet side an inlet chamber (6, 106) from the one on the outlet side (ISI * 115) separates, elaen allowance (7.107) eur sympathy of the Liquid into the inlet chamber (6, 106), an outlet (16, 116) but discharge of the pulsating liquid and a Drive (33 »133) for the transmission of a back and forth Movement on the piston (3 »103), with the piston (3, 103) in motion-projecting connection with the valve body (9 »109) stands. 2. Apparatus according to claim I _9, characterized in that the valve seat (12) is located in the piston (3), "honoring the speaking valve body (9) while driving a game, we 1-ones determine the opening of the valve" with the piston ( 3) is connected, 3 «Device according to claim 2, characterized in that the valve body (9) feeds a valve disk (10) which occupies the entire surface of the piston (3) directed towards the chamber (15) and is inserted into the piston ( 3) let in 4et _f while it has a Veatilatange (11) which is housed in a central bore (8) in the piston (3) 009809/1192 - 13 - which has a transverse bore (13) through which a bolt (14) is guided, which establishes the connection between the valve and the piston while maintaining play. Device according to claim 1, characterized in that the One-way valve has a valve seat (112) in the housing (101), while the valve body (109) cooperating therewith is movable between the valve seat (112) and a stop (113) is mounted in the housing (101) and is in frictional connection with the piston (103) ρ 5. Apparatus according to claim 4, characterized in that the Valve body (109) has a valve plate (110) which the the largest rope of the wall of the chamber (115) opposite the piston (103) and which has a bore (114), into which a bolt (108) extending from the piston (103) protrudes, which with the wall of the bore (114) over a Hsibimgs member (121) is in contact. 6. Device according to one of claims 1 to 5 »thereby ge ~ calibrates _f that the piston (3) is slidably mounted in a Sylin * · (2). Device-after-one of claims 1 to 5, characterized ge "ä konnseicbxietj that dsr piston (103) is connected to the Seiteiiwänden the chamber (115) via a diaphragm (104). Device according to one of claims 1 to 7, characterized gokenrtsaiciinet, that the drive (33, 133) is connected to the piston (3, 103) via a resilient coupling (20 120) * According to Claim 8, characterized in that the Solljen Op 103) is guided through a piston rod (17, 117) which is stranded with a flexible "coupling (20, 120)" and counteracted by the pressure of a spring (22, 122) ) between the arrival 0-09 80 9/1 1 9 2 '"" *' " BATH drove (33, 133) and the piston (3 »105) of the stroke β and thus the delivery rate can be reduced. 10. The device according to claim 9 »characterized in that & aÖ the piston rod (17, 117) has a bolt (19» 119) which is slidably mounted in a sleeve (21, 118) and a stop (23, 123) for the sleeve (21, 118), while a further stop (24, 124) is provided for a compression spring (22 , 122), the compression spring (22, 122) being located between the second stop (24, 124) and φ of the sleeve (21 118) is located. 11. 'Device according to claim 10, characterized in that the second © stop (£ 2, 124) to change the pressure the seder (22, 122) is displaceable. 12. Device according to claims 9 to 11, characterized in that * shows that a motor-driven eccentric (35, 133) is provided on its drive, which is connected to the free volume (31 » 131) the piston rod is connected and its speed the! frequency of the device determines " _ 13. Device according to one of claims 1 as 12, characterized by ™ indicates that a return line (33, 138) to the Sinlaßkammer (6, 106) is connected, by means of which in connection with the ^ inlaS (7, 107) the KLÜssigkeit im Circuit can be operated 1 0 0 9 8 0 9/1 19 2 BAOOBtGiNAt.