DE1553163A1 - Rotary lobe pump - Google Patents

Description

Patent Attorney · J ^ "- B - * ^ Μ«. ■.

7β Freiburg ί. Brag.

Pumpen- und Maschinenfabrik Lederle oHG 'File S Freiburg (Breisgau) S / B

^p piston pump

The invention relates to a * rotary lobe pump, in particular Sum pumping of viscous liquids, tests and the like is used and a gate valve stored behind its barrier wall onKoiet.

Rotary lobe pumps are already known for which the separation des Druokrautnes. ^ fom & ugraum by means of a lockable AbsperrschieOtr3 takes place, -ler sealing on one Part of the SehXuse-Xnnenwanittng slides in front and with a The end of the roughly elliptical shape rests on the rotary piston. In this previously known rotary lobe pump, the slide valve is mounted in the pressure chamber, which among other things with regard to the sealing of the shut-off valve shaft is disadvantageous. Furthermore, the previously known rotary lobe pump the further disadvantage that there is a gap between the pressure chamber and the pressure difference in the pumped medium prevailing in the suction chamber is not or not good for regulating the system pressure ' of the gate valve on the rotary piston can be used.

Another disadvantage of this previously known rotary lobe pump consists in the fact that the gate valve or his

BAD OWGlNAU 001117/0071

Bracket and storage within the · Furderetrones in pressure room move"

Before a rotary lobe pump has been proposed, in which a gate valve is arranged in such a way in the pump duct Is that the one that ruled in Druokraua as opposed to the suction room overpressure of the Furdermadiuins the gate valve against the Rotary piston prints. Oemlß this suggestion is the gate valve at one end of a shut-off fl xe can be swiveled stored «while the shut-off surface with its other find trimmed on the druokseltlgen piston surface. try have shown «that this variant was for sahlrelohe Application cases well proven »da · but by name for larger pumps, at. higher pressures and e.g. also at Use of certain materials for the rotary piston or the gate valve, not inconsiderable wear and tear appear. For example, when using stainless steel (V2A steel) for the gate valve and / or the rotary piston there are strong spanking symptoms on these parts on when the Druokilffcrenz between the suction space and the Druckraun is large. Ferrer can do the above described Rotary piston pumps are subject to heavy loads Storage of the gate valve occur. Uta avoiding these disadvantages is not an option for a nooh Rotary lobe pump belonging to the technology, which in particular is used to convey difficult liquids, fruits and the like and has a gate valve mounted behind its barrier wall, also proposed that the fulcrum of the · «

009817/0078 bad original

Storage of the gate valve a little next to and on the string facing away from the rotary piston of the action Resultant of the differential pressure acting on the barrier wall lies. In this way one learns "that one aeita Orofiteil of the Druokea acting on the barrier wall in the lagarung behind him is being guided; on the other hand but also uses the respective pressure difference « des Pörderaediutta swisohsn suction and pressure ports with it off, the »system pressure of the gate valve on the rotary piston. Des works to this effect in a desired way from the fact that with sroBen pressure differences a stronger pressing of the gate valve on the rotary piston a.

In the case of a row of conveyors and kneadings, Such a purepon is well known. Dagegec occur in particular boi potash rivers or strongly incriminating delivery media among other things the disadvantage on »that the shut-off sole over Bandhaal is in general position» neiatena in the Höohaten, stuck \ md nioht r> hr by means of those acting on him Spring can be pulled back into the seal, under incrusting promotional procedures should help in this Registration eolohe media are understood that leloht form a crust, as belBpleXsweieo at 4t9se> Syrup, glue

the case lat.

060 817/007

In another part of the rotary lobe pumps described last consists in the fact that the pressure forces that produce a torque exert on the gate valve, are not easily adjustable. In itself there is the choice of the position of the pivot point the gate valve is a good way to increase the torque « with which the gate valve is swiveled against the rotary piston will affect »do. In practice, however, this fulcrum is already firmly established for completely unrelated Puapen constructlons ■ to the smooth PuapengenKuse or the same pumps if possible · turn housing parts forward mOohte.

There is therefore the task of producing a rotary piston pump su ..; in which, among other things, the disadvantages outlined above are largely avoided. In particular, a rotary piston pump should be created at the nan on easy «. ..-. Catfish the torque because of the different pressures Ib conveyed medium on the gate valve acts «in a simple way Influence catfish, especially if necessary, can increase. Another important point of the task is to prevent the gate valve, esp. after the standstill of the rotary lobe pump, in a raised

»R
The position in which * has no contact with the rotary piston remains stuck. When the rotary lobe pump is started up, this can lead to no pressure difference whatsoever between the connections

00IS1 7/00 ^ 8 BAD ORIGINAL

Eating suction and pressure port forms, so that it then also from this round of compressive forces there is no torque create «veloheβ the gate valve sealing against should press the rotary piston. Furthermore, it belongs to the task, to train a rotary lobe pump so that under certain circumstances no return spring for the Gate valve is required. When using HUoIc- ' Stellfedem you often need unwanted stuffing boxes or ran hard inside the pump housing Accessible, not easy to clean cavities to accommodate the springs The pumped media are unfavorable.

The lusting according to the invention of the task set out above consists essentially in the fact that with a rotary lobe pump, which is especially used for pumping tough, encrusting liquids, fruits and the like, and one behind his Has barrier wall mounted gate valve, the pivot point of the storage of the gate valve something next to and on the facing away from the rotary piston on the side of the clarification line resulting from the differential pressures acting on the restricted area wik lies, wherein the gate valve a protruding from its sealing wall in the Druokrautn bar or the like. has, which rests with one side on the rotary piston and

with its diecar side opposite the printing

is exposed to a strange pumped medium. This gives you

00ΜΊ 7/0070

An additional support area for the print side Conveying medium in the sense of an amplification of the torque acts, which presses the gate valve against the rotary piston. By choosing the thickness of the protruding bar, it is easy to influence the compressive forces that increase the torque. *

I am another "* independent and essential irritant consists in the fact that the rotary lobe pump is an angle lever type, reset device for the gate valve actuated by the rotary piston having. This is namentlioh when starting the pump or when sloh the shut-off area is raised in a Has established a position / without any action from the outside solely through the movement of the rotary piston of the gate valve again to rest on its surface or at least to the vicinity of its surface with certainty surüok.

Expediently, the reset device can eloh up to about in an over 90 ° of the Dlohtungstelle of Absperrsohlebers leading Bereioh of the rotary piston and extend at least to close to its surface. Zweokmäeiger catfish is that The surface of the reset device is curved and on the Qutrsohnittprofil the rotary piston matched so that »wipe the restoring device and the rotating piston eloh regularly only a small amount of play remains, while the Sealing surface of the gate valve is in contact with the wire rod.

009t 17/0076 ^{BÄD 0RIGINAL}

At a distance of 41 · Μ asu duroh FonMohlufl, da0 In close to all positions of the Drehkolbena swisehen 1ha and the Doth flee the barricade bar at least a little Gap can remain. Daduroh will be a significant one Pressure drop la Druokstutsen veraleden, so daf aittels der Druotodlfferens swlsohen dea Druokstutsen and des Saugatutssn Ina — r nooh an Orehawent on the Abeperr- • ohleber Auagetlbt is “that it moves on the rotary piston. Vorsugawelse let dl · Anlagefliehe the RQoketellTorrlohtucf eo on the rotary piston profile • tiaet, dal ale wenlgetena in a rotary piston arrangement Bring the Abeperraohleber to the rotary piston sur system. This is the hub when approaching the point wlohtlg, dealt • loh lelohter la Druokatutsen build an elevated Druok came.

Nan can the RttokatellTorrlohtung la Beltenprofll U-fundg sdt swei su to train the rotary lobes rowing nookstellaraen The V-shaped training has the advantage that, on the one hand, the shut-off bar on both sides is seldom in the * Khe Bearing points are equally divided into an infringement movement received, that on the other hand no su large · see flee back and forth within the sucking pump away.

00ίβ17 / 0078

Further details of the invention selenium with reference to some In the drawing illustrated exemplary embodiments explained in more detail. Ba shows:

Pig. 1 is a sectional side view of a rotary lobe pump "which has a gate valve mounted behind its barrier wall" whose pivot point lies somewhat next to and on the side of the line of action of the resultant of the differential pressure acting on the barrier wall facing away from the rotary lobe. The invention is intended, inter alia, to improve a single rotary lobe pump even further;
Pig. 2 a similar to FIG. 1, kept in section

Side view of a rotary lobe pump according to the invention; Pig. 3 shows a cross section through the rotary lobe pump according to the section line IXI-III in Pig. 2;

Pig. K is a schematic representation of the gate valve of the rotary piston pump according to Pig. 1 acting, a torque 'Nl generating forces;

PIg. 5 is a sectional side view of a rotary lobe pump; the one storage of the gate valve geaäfi the execution according to PIg. 1 and a reset device old has a curved contact surface,

Pig. 6 a similar representation of the " Gate valves provided with a protruding sealing strip act «generating a torque M2

Forces and
Pig. 7 shows a side view of the rotary lobe pump according to Pig. 2.

00981 7/0078

BATH ORIGINAL Pigur 1 shows one

Rotary lobe pump 101, a housing 102 possesses, in which an approximately elliptical rotary piston 103 * owie a shut-off bar designated as a whole by 104 are provided. This has a shaft 103 that is old his! rear, wave-like end * in the following briefly called shut-off upper shaft 106 - in a bearing bush 107 stored 1st.

The suction chamber 115 of the rotary lobe pump 101 is from the pressure chamber 116 separated by the rotary piston 103 and the shut-off valve 104. This has a barrier wall 117, the et & stfae & fwe-a has the shape of a segment of a circle and is attached to a speaking trained part 118 of the inner wall of the housing 102 is applied so that on the one hand a sufficient seal occurs between the barrier wall 117 and the housing 102 and on the other hand sliding of the barrier wall | 117 on this part 118 of the inside of the housing corresponding to the pivoting movement of the gate valve 104 is possible.

The pivot point 119 of the mounting of the gate valve 104, the means the pivot point of the shut-off valve shaft 106 in the bearing bush 107 is somewhat next to and on the side of the line of action 120 facing away from the rotary piston 103 Resulting 121 of the pressure "force" acting on the barrier wall 117. This creates a torque Il 1 that the gate valve 104 rotates in the direction of the rotary piston 103, while a large part of the pressure port 116 ago on the blocking surface 117 acting overpressure, however, In

_BA D ORIGINAL 001117/007 «

di · storage 106, 107 dt · gate valve · 10 * directed will.

On that part of the gate valve * 104 which is located in the area of the suction room 115, only the pressure prevailing in the suction room acts predominantly. Only on that part 122 of the barrier wall 117 "which lies between the KaM 183 <* ·· 0 · *""house 102 and the" rotary piston 103 frtl warn pressure "tutsen 116" does the pressure force present there act · K «dl · the differential pressure Generate Λρ. Dab ·! the pressure difference between the pressure p2 prevailing in the Oruokraun and the pressure pl prevailing in the suction chamber is understood by the pressure difference.

FIG. 4 shows, in a highly schematic representation, how the resultant 121, which is made up of the differential pressures £ i , or its line of action? 120 on the side facing the rotary piston 5 at the pivot point 119 of the Absparrschieber over * ·, so that the Difforenzrückt .Δ ρ generate a torque Nl that turns the gate valve 104 on the rotary piston 105 * u. In this case, however, the torque-generating component of the reulting 121 or the sum of the torque is relatively low. When large diff) r * nzdrüok «^ p press on the barrier wall 117, this very considerable part is passed on to the storage 106, 107, so that the gate valve is not subjected to excessive stress 104, for example. of the rotary piston 105 occurs at their contact surfaces. This keeps the wear and tear within tolerable limits.

BATH ORIGINAL

009817/0078

1653163

Mach of erflndungsgeeäten training b "altzt the rotary pump 201" as si · in Figures 2, 3 _f iand% dargeatflit itt, as gate valve 20 * a on its blocking wall 117 mounted, projecting into the pressure chamber 216. A strip 250, which, with one side of namely, the DlohtflKche rests against the rotary piston SOJ and is exposed with its side 252 opposite this side of the delivery medium on the pressure side. This results in an additional torque which presses the gate valve 204 against the outer surface of the rotary piston, as can be seen clearly from FIGS. Which changes that are more difficult to carry out, for example the relocation of the pivot point 219 of the gate valve 204, are not required to adapt the torque M2 acting on the gate valve 204.

The rotary lobe pump 201 according to FIGS. 2, 3, edge ΐ has a reset device, designated as a whole sdt 255, for the shut-off area 204 gate. This consists of a lsi side profile U-shaped component, which in the mine of the crosswinds 256 of the PuapengehMuBes 202 each has a back clara 257 or the like reaching into the area of the rotary piston 203. has, the roe rotary piston 203 is actuated and old of the stem 205 of the gate valve is rigidly connected. Xb AusfUhrungsbelspiel according to the figures "^ 3 M * td 7 are two flange shafts 205 in the gate valve

BADORiGlNAL 008017/0078

.12-

provided that 256 dtr rotary lobe pump 201 are also located in the NVtM dtr side wall. Di ··· Sohlft · 205 aind gelled in welle tummels 258. Dl · reset device reioht thereby approximately into a un 90 ⁰ with respect to the sealing surface 25I of the gate valve 204 extending Bareloh of the rotary piston x 203 and is tangent to it there. while the Diohtungeleiete 250 rests with its sealing surface 251 on the rotary piston 203. FIG. 5 shows an approximately modified design in which the return device 355 has a curved contact surface 359 which is matched to the elliptical transverse profile of the rotary piston 303. This means that during the movement sequence of the rotating rotary piston and the return device 355, at least during the rental period of a rotary movement, there is at most one ringing play when the rotation flare 351 of the gate valve 304 is in contact with the rotary piston 303.

According to a further development of the invention (see Fig. M), at least one bore 305 is provided in the gate valve 304, which extends from the side of the gate wall facing the Druokraua 316 to the rear side of the gate valve shaft 306. Duron it can liquid, which is under the Furderdfcuok p2, penetrate into the bearing 306, 307 and serve there for lubrication. Since the · LegerbUohae 307 ■■ circumference is open and opens into the part of the pump housing 302 belonging to the Saugraura 315, a peeler can be used if necessary.

009117/0078

BATH ORIGINAL

Bitteletroü from Druoketutsen J16 bam · Druokrau »along the Lagepe · flee in dan eaugraua f booklets.

To relieve the bearing 506, 307 1 * 1 very high load, the invention also suggests that a pressure relief valve shaft 306 is provided on the backward side of the shut-off valve shaft 306. The size of this flee can be determined according to the pressure applied to the gate valve yöK baaasaan.

Qi an ungttnetlga Baalnf luaaung da · Förderatroee · in dar ßrehteoibanpuepe 801 btw. yoi "aring su hold" is the gate valve 204 bxw. 504 in a room 826 or 326 Untergabrecht, which is also next to the Pttrderstroa.

Bai der AuafOhrungafora naoh Flg. 6 lat the bearing box 307 part of a bearing bracket * 327 »which has a shaft 328 of the size of a cylinder sector. Then, as the Rough "naoh 386 a« «Eiteren KrflndungsMrkaal is designed as a circular sector" lift SiOH the bearing carrier 327 there easily install and secure and 1st duroh the kreissektorfuraige training of Rauaes 326 AUOH the Fora of AnlageflMohe '318 for the

corresponding part of the Spernrand 317 gaachaffen. Sntspreohendee also applies to a sector-specific formation of breed 886 in the Orehkolbenpuape 801 according to Figs. 2, 3 and p.

BATH ORIGINAL 009817/0078

The design and arrangement of the shut-off valves 204 and 304 according to the invention enables the contact pressure influencing the seal with these shut-off valves and the associated rotary lobes to be at least dependent on the difference between pressure and pressure. In the case of large Draek Ohtersohleden between the pressures p1 and p2, a stronger pressure of the gate valve 204 bxw takes place in a desirable way. on the rotary lobes 203 and 303, respectively, than is the case with lower pressure drops. According to the invention, the gate valve 204 or 304 against the rotary piston 203, for example. 303 the pressing torque MZnIoht can only be influenced by the fact that at the pivot point 219 or 319 of the shut-off area there is a more or less large distance e from the action line 220 or 320 of the resultant 221 or 321 (cf. in particular FIG. 7); As already mentioned, it is also possible to additionally influence the torque N through the choice of the thickness of the sealing strip 250 or. This allows in particular. A loan correction of the torque when the pivot point 219 or 319 is already fixed in a pump construction. Therefore, a spring required in the previously known V rotary piston pumps equipped with gate valves can often be dispensed with. She 1st in Pig. 3 'is drawn in dash-dotted lines and provided with the reference number " 210" and could, if necessary, increase the torque nooh dependent on the pressure difference ΛΡ. In the previously known rotary lobe pumps of the predefined type, a spring 210 acting on the gate valve is auoh

009817/0078 bathroom

therefore necessary, well al «d« a Abeperreahieber auoh then brings you into contact with the Drebkolben when swiaohen there is no pressure difference between the suction chamber and the pressure chamber, beiaplelawelae halo Approaching the rotary piston pump. Through dia arflndungagaiiMBa equipment dar Drahkolbanpuqpa 201 brw. 301 ■ It tlnar RUokholvorrlohtune 255 bm. 355 for dan Abaparr- • ohlabar 20% bxw, 304 not applicable dlaaaa lrfordarnla, one RUokholfadar su Tanrandan. AuSardaa wlrlct dia arflndungagaioltBa RUckholvorrlohtung, dia fomaohlUealg duroh dan Drahlcolben 203 bxw. 303 batXtlgt, also bal athr sHhan FlUeelgicaitan odar when sloh la POrdantadlua Kaa% a »-a4v4e & v Kruatan or the like. have formed, weentllch eloherer ale an aolohe spring.

Dia arflndungagaatflfaj alt dan rotary piston zuaaiaMnarbaltanda Rüolcholvorrlohtung for the gate valve lat aelbatveretMndlioh bal sahlralohan provide others with abaperraon livers Rotary piston pumps can be used · Snteprechandea applies to a Tora legend Diohtungaleiete sur BrnOhung da «Drenaoaantea aa Abaperraohlebar.

0 0 9 817/0078

BAD ORlGlNAl

Claims (1)

Patent ansiirtiaha 1.) Rotary lobe pump, dl insbee. sub pumping of sKhen, encrusting liquids, fruits and the like is used and has a gate valve mounted behind its 8 barrier wall, dftduroh characterized that the pivot point (^ 19; 319) of the mounting of the gate valve fcOK; 30 *) somewhat next to and on the side of the action line (320) of the resultant (3Bl) facing away from the rotary piston (203; 303) of the bsw on the barrier wall (217). (317) acting Differenidrüoke (4 p) lies, wherein the gate valve (204] 304) «a sealing strip (230 | 350) or the like protruding on its barrier wall into the pressure relief (216). has «the old one side (sealing surface eg. 351) so rotary piston {303 eg. 303) and its side (252; 3) 52) opposite this side of the druokseltigen Fttrderaedium is exposed. 2. Rotary lobe pumps, especially for pumping a, encrusting liquids, fruits and the like and has a gate valve mounted behind its barrier wall, in particular according to claim 1, characterized in that In a nutshell, the rotary lobe pump (201; 30I) has a winkelhtbel-like, actuated by the rotary piston (203; 303) 009817/0078 ORIGINAL BATHROOM RUokstellvorriohtung (255) 355) for the gate valve (20 * j 304). 3 · Rotary lobe pump according to claim 2, characterized in that the resetting device (255; 355) extends up to approximately 90 ° of the Dlohtuttgsfläche (251; 351) of the Abaperrus valve * C2O4; 304) leading region of the rotary piston (203; 303) and at least up to close to its surface. 4. Rotary lobe pump according to claim 1 or 2 or one of the the following, characterized »dad the investment area (359) of the reset device (355) curved and up matched the transverse profile of the rotary piston (303) 1st, so that between the reset device (355) and the rotary piston (303) usually only has a small amount of play left when the Diohtfluche (350 of the shut-off area (304) rests on the rotary piston. 5 · Rotary lobe pump according to claim 1 «2 or one of the following, characterized in that the plant (259; 359) the resetting device (255; 355) on the rotary piston profile Is coordinated "that they are at least in a rotary piston" division brings the gate valve to the rotary piston (203; 303) to the plant. ORIGINAL G09817 / 0Q78 6 · Dreltolbenpqsae according to claim 1, 2 or one of the following, because the back plate device is rewarded Fleitenprofile O-shaped old swel su reaching the rotary piston RUcksteUamen or the like. (257; 357) formed Ht. 7 · Rotary lobe pump according to claim 1 or one of the following, Muren gekensseiotast, dsl its gate valve (8 (A, 304) la ftsttgraum (8151 315) »esp. in elnsa »flat room (8s6i 386) 6 · »eaugrtumes, edt is. 8. Dreltcae according to Anspraoa 1 or one of the following, dtoureh gekennselohnet, 4sJ your shut-off shoe (80tj 304) a · la öjaersohnitt circular segment-shaped, to a disguised ■ Msgeblldeten Oshttuseteli (2l8j 318) poetry Has sealing surface (89Oi 390). 9 · Rotary lobe pump according to claim 1 or one of the following « thereby gskenngelohnet that with their shut-off area (20% j 30%) at least one hole (385) is provided » the tone of its SperrflMohs (317) to its bearing bush (307) leads. 10. Rotary lobe pump according to claim 9, characterized in that that in the bearing bush (307) or the like. lying Back of the gate valve (304) a pressure relief surface (386) is provided on the required medium works. 009817/0078 _{8AD 0RlGlNA} t U 8 & ^ $ 3tapWft neon claim l odtr einte dtr foletndtn, dadoroh ftfeannialalintt, dall dtr Abaptrraahitbtr (804; J (A) on tins? AbaptrraohitbtrwtlXe (506) arranged is «on dit eint vrosugswtis adjustable in their power * itodtr (2i0j 310) aagrtift, 18 · IHrtWfo ^ Nmpuap · naos Anepruah 1 or tint «dtr followsndtii» fafeaoDMiotmtt «dal dtr Abaptrraohitbtr (204; in tin— etltUeh dta PurdtratroiMe arranged Raua (ÄS (6j 386) gtlagtrt iat. 13. DrebföOte & puiape naeh Aaapruoh 1 odtr «inui dtr daduroh ctkan & stienait, dal dlt lagtrung (306; 307) held by 4 & aa l3a * rts * S5ftr (^ 37) is« dtaatn Rttolc- • tiW (V) & sa. »Bra ti DrefatolbOTpiay naoh Anapruoh 1 odtr tints dtr followsndtn, dadurob eaktnnstiehntt «dafi dtr Raun (226; 326) sur Ontavtorintung dta Abaptrraohlebera (204 or 304) tint krtiaatttorföraiet IimenflÄcb «bteitst. Patent attorney CONSTRUCTION ORIGINAL 009817/0078 IO blank page