DEP0053393DA - Device for the automatic limitation of the pressure of a pressure stage in multi-stage pressure pumps - Google Patents

Description

PATE N TA N WA LT
DipL-Sng. EIDENES «
STUTTGART-N, Kdragatr «I4t

August 29, 1949 / S .Vilheln Büßmann K ₀ G-., Manchen

Patent application
JU2511

Use pattern help s anrae Idüiag
2

Device for automatic limitation of the pressure of a repressurization stage with multi-stage

Pressure pumps

Oezieht invention to a device which is capable of automatically limiting zn in a pressure stage of a multistage Pruckpumpe the ⁿ ruck.

Ea is known in multi-stage pressure pumps to cancel the delivery of one of its fruok stages depending on the delivery pressure « be it about the power consumption do not grow beyond a certain amount, ar. let, be it to change the total delivery rate "

It is also known to heat the truck of the stage to be switched off for this purpose, by arranging a spring-loaded valve there, 5 which opens at a certain point and is released by the Föräerdrucl? limited to the corresponding level. The T ¹ T Toers fcuf e then has all ^^ öinga constantly against the switch-off pressure ii / convey and isc not relieved, Piese conveyance; but does it require a considerable expenditure of energy, which must be prevented again by throttling _? what sndem a unerwnngchte temperature walkways tion D3ding "c <

In the case of multistage pumps, it has already been suggested that the pressure of one lower pressure pump should be reduced by the pressure of the next higher one Switch off the pressure stage. For this, msn needs a

increase in the higher pressure stage, rieser Pruckanstieo · done but the slower the smaller the Hochdruckf ^M rdermenge in relation to Niederdruckfc'rdermenge is, "At relatively keel" is heard ϊ ¹ Hoc '^ dr ^ ckf örde.vme "£? e therefore there is a risk that the cutting process will be delayed for a considerable period of time.

The invention aims to avoid zn mix simple means cie disadvantages of the known embodiments, and achieves this by substantially simultaneously to the Truck a lower and a higher-stage conveyor-exposed control organ which to under the common pressure of both stages an outlet port in that stage, the pressure is limit, releases. The application of the invention is not restricted to two immediately adjacent τγ-uek stages of multi-stage arrangements. Rather, the pressure stages can be as far apart as desired. Several such arrangements can also be used on the same two or multi-stage pump. Pas control member is equipped sweckmäPig with two equilateral acted upon by the beidexi Pruckstafen separate .Angriffsflächen from, said. "Jirkungsricniung press DER effective in the Schlieirichtung spring Bela Lung opposite" The spring loading allows, optionally with an adjustable stop, the means to the respective required = lent suction pressure to regulate the higher pressure level,

The invention is described below without reference to an exemplary embodiment shown schematically in the drawing

\ e:, whereby further characteristic features will result.

In the exemplary embodiment, 6 is the working cylinder of a machine and 7 is its working piston, the working movement of which for a preferably considerable stroke section requires a relatively low and then a high fluid pressure can conduct a line 24 coming Pruckflüssigkeit optionally via lines 27,28 on one or the other side of the piston _o FIRD the liquid via the line 27 directed to the left, in a known Veise, the confined in the right half of the cylinder 6 Pl "lIQUID via the control apparatus 5 and the line 22 flow off into a liquid container 32 * Purch the same line 22 also flows the truck fluid from the left cylinder half ao when the control unit 5 conveys the truck fluid via the line 28 into the right cylinder half.

1 is a low-pressure pump which sucks liquid from the liquid container 32 through an outlet line 19 and conveys it Line parts 50,31 and a check valve 3 in the line 24 can promote au.

? is a high-pressure pump with a significantly smaller delivery volume than the low-pressure pump 1. It receives its fluid via line 30. Its pressure line 29 opens into line 24 in bar. The maximum value of the truck in the high pressure line 24 ( e.g. 300 at.) Vzann through an "overflow valve 25 in

known .Veise werdarij via which the excess amounts of liquid through the line 20 in the container 32 from = can flow »

A line 23 is connected to the Niederöruck line 30,

which opens into a chamber 11 of a Scnisbergehäusea 9. In the Sciiieborr; ehc.üse 9 is a slide body 8 as a control and outlet element

Länjsverschiebbar guided, the lower, in the chamber 11 extending pin 18 in the position shown an outlet = Shuts off the opening of the outer chamber 11, which opens into the line 21 indicated below. In the low-pressure chamber 11, the slide body 8 a ring shoulder 17 on which the low pressure in the arrow direction 53 acts.

The slider body 8 has at its in the drawing located at the top end of a collar 13, to which the a ^ walls engages a ^ Eder 12 s which is by its other end to an adjustable stop \ ^r - supports, 14 is a stopper which the The stroke of the slide body 8 is limited in the direction of the arrow 33. The stop 14 is expediently also made adjustable in a manner not shown.

A branch 2fi of the line 29 leads into an annular high-pressure chamber 10 of the slide valve housing 9? in which also an annular shoulder 16 of the movable slide body 8 is located.

A facility works as follows;

As long as the working piston 7 does not oppose a high resistance to its stroke movement (idle stroke section), the Nieder = promotes pressure pump 1 via the check valve 3 a large amount and the high pressure pump 2 directly a relatively small amount of liquid in the line 24 »The at = - the liquid quantities add up and move the working piston 7 together; depending on the setting of the manual control unit 5 in one or the other stroke direction.

Does the movement resistance of the working piston 7 rise during the stroke / does the truck rise in all pressure lines 30 _?

31s23} 23.24 _s 26.27 _? 28 to "rieser increased Truck 17 _S 16 is also on the annular shoulders effective and can, depending on its ^ r '^ e the valve body 8 against the action of spring 12 more or lifting less, thereby causing the shoulder 18 of the truck agent outlet releases accordingly in the drain line 21 to the container. In such an operating state, the two pumps 1 and 2 with the same - depending on the tension of the "spring 12 and the outflow cross-section at 13 - pump fluid into the line 24, thereby pushing the working piston 7 forward together and holding the valve body 8 in it open position _? while also in the same truck (always apart from the friction losses) the excess amount of liquid delivered by the low-pressure pump 1 flows off at 18 »

This operating state changes when the movement resistance of the working piston 7 has become so great that under the fluid pressure corresponding to this level, the valve body 8 rose to such an extent that the entire amount of low pressure escapes through the drain line 21 without this fluid pressure causing the working piston to move further 7 cause tonnte Tie Nieäer ™ äruckpumpe d does not demand any more by the lines 31 and 24, but only the Honhäruokatufe 2 24c in the line this includes the "HückscblagTent ^ l 3 _P wodurqb another truck. * - increase in the line 24 and a movement of the piston against an increased resistance to expansion is made possible by the pressure.

The .printest! gerüng in the line 24 ■ but see also what ea is here beäbriäers. arrives "immediately in the chamber; 10, in that the high jerk: aiif ^r presses the ring surface 16 and the effect of the median = press s ;." on ■ - 'the Ringf Iac he. 17 very effectively supported = ..through this the summer body is raised 8 raäch rider and the drain = ■ qaersGhriitfeb-ex _: 18 increased so much 'that ..' the amount of pressure held at 3 but can flow off the line 21 ₅ - no one dia Mexlerd.ruckpximpe first hazardous Dmekspit2e in Oer ■ "lead-ung 30 _s 31 au erzeugeno, it is sogar'-according _to: the invention possible that Drucksunahme av £ äev 'HoGiiäriickseite so on .iRlngschulter more s. ¹ .- 'au "let that the'AbfluSquers'öhnitt at .18; to reduce the pressure considerably in the low pressure stage 30 _{: S} 31 's 23' zv -.- e-rreicheii "-this low pressure can be reduced to the value " - f.er 'just as filling pressure for the Hoohäruckpump ... ausr-eio'Jh / to risse :? The required minimum pressure can be easily: Dimensioned the ^: Jreü ^ T .12 and the arrangement of the stops 15 -bSWo-; V4 one of the He ¹ Ui ₁ .

According to the invention / will therefore dacarolif that. two different ©: Druckstu: L "en like together. during '"the' relatively kurssii Umschaltvpr.gang3 aiif dae the 'Druoii the one stage a "limiting" Um & chcil.tstück 8 in a suitable manner "works" -, assures that Lr- uokspitssn and the <3a <rn.it. ■ vexb'iiiisneii ffefaiirsrs at · TJL "jshal-te: a not YOTkommen ,,. unci in the further course it ä To 3 α hai τ ν c: i'ganges sine Pruckabsehkung ersielty which causes a significant Energie.gev.'inn during operation of the multi-stage pump system.

Claims (1)

A α s ρ r ü c. ti e 1, one R-sur iqhtung automatic 'limit desiPxmciies a DmVj ^ Bi) XIB' in multistage .Oruckpoigj ^ sn ,, geXennzeic a same / the Dj-ei .uek # it: niec eren- wd;?.! a Förderst vif®. branched out S expensive organ, welehea. router d em. common pressure "at both stages err an" outlet opening. -in 'that stage ¹ , is. 2, ElnriöfetiHig Kcseh. il: as proposition 1 _s , daciurah ge kennsei ο hixst “'. ^; 5ass -das -das Cie from la i3 opening of a Druskstuf ef reigebsnäe, fsderbeläete St-emerorgan two separate «, νοϊΐ der. lower laiac! aölaeren .Pru-afc = s-tufe.:.Visaufäciilagt-ί -'Aagrifffläohea has, whose- ^ irlcungsriotxtuii öer voi ^b sug3! ». eisä one divisible Feflerbelas-tun ^ versusg.egengeäetii" b is _a 3, EiBrislitmig, na.qil Aaspru & h 1 measure ' 2 , · ^ eltsnaseichnet öuroh eiaen einsi; elitist Ansghlsg, de «d-ö'ri.'Huö -'. Äeif Ste ⁱ ueroi'g & .ii, s''in '.sei; ner OifüuxigsriGhtung-'liegreiüst uij.d because by öen Ansatigörucic the early-rs.ii ι-ιακstufe regulates. 4 »Ei.nrio.atusg aacll Aaspriioh 1 to 3 _S 'gefcennaeiobnet characterized ;, · 3εΏ the Drückieitang ö.ä.r siisaaran pressure stage tiamittelbar comprising: eei Saugsoite' of the higher Eruclrsxufe 'sovfie the Mieäersz ^ cfeangi-IFFC fläche'GSB- Sveuerofgans u: aö Giittelbsf over a Rückachiag ^ -feTAtil .mit äer-Druecs ^ lti »ö.er huhf'r'en pressure stage: verbunäeii ist, ^ Ma; -rend; one. Absw.eig: aag de.r 22.1am .DruGfcverbräiich.er leading Hoäh == ■ druo'kloi't.img connected to the Hooiidrucfeangrif'f area of the external organ i-st * 5 * Device according to claim 1 to 4, characterized in that the control and external organ is designed as a slide, des-ε he. 3eiiietergehäu ~ e eise & λ the iiochoruckleitung connected »the high pressure attack surface as a ring achulber containing high pressure chamber and sine swöite oeenfaila ring-shaped JSiedordruekkaniiner connected to the truck = line of the low pressure stage has ^ the so.onl öi ^ as the single attack shoulder ¥ orc slide) controlled release of the Wieöerdruokstuf e contains = 6. Verfanrcn äv.m SöSrisb a hydraulic working piston, wherein the the Drucksit'csi \ ¥ Solbeiiimbes the at-found on a higher Äi "böiΐβdruck umgese & alfst is, after Anepi aati-1 to 5 _f daäuraü geksnnseichnet that a lower" fiber Cruckstufs sin Rüolcschlag- 'valve (5) and a higher pressure stage immediately Pruckflässig- * not promote Arbeitsiiolben [I) and both rruckstufen gemeari = ¹ · room em m the lower pressure stage overflow valve built ± .8 i) control which may already be open then if both brucite stages with a relatively low pressure in parallel with each other föröera pressure fluid to the working cylinder (7), and later releases a large cross-flow cross-flow that reduces the pressure of the low pressure stage, provided that and so the single test medium for the ¹ high pressure stage sum work piston (3) closed