DK164133B

DK164133B - PUMP UNIT, NAMELY HIGH PRESSURE PUMP UNIT

Info

Publication number: DK164133B
Application number: DK500188A
Authority: DK
Inventors: Karl Johan Klitgaard Frandsen
Original assignee: K F Ind As
Priority date: 1988-09-09
Filing date: 1988-09-09
Publication date: 1992-05-11
Also published as: AU4226289A; DK164133C; WO1990002879A1; DK500188D0; EP0433344A1; DK500188A

Description

DK 164133 BDK 164133 B

Den foreliggende opfindelse angår et pumpeaggregat, navnlig højtrykspumpeaggregat, og omfattende et pumpehus med et antal pumpekamre med tilhørende fortrængningsorganer mellem en lavtryksdel, hvor pumpemediet, f.eks. vand, tilføres, og en høj-5 tryksdel med en afgangsforbindelse til et hjælperedskab, f.eks. et håndbetjent strålerør, hvilket aggregat fortrinsvis omfatter en motorenhed samt eventuelt en kobling.The present invention relates to a pump assembly, in particular a high-pressure pump assembly, and comprising a pump housing having a plurality of pump chambers with associated displacement means between a low pressure section, wherein the pump medium, e.g. water is supplied, and a high-pressure part with a discharge connection for an auxiliary tool, e.g. a hand operated jet pipe, which assembly preferably comprises an engine unit and optionally a coupling.

Sådanne højtryksrensere kendes i talrige udførelser til fri-10 tids-formål; men reelt er der normalt tale om neddimensionere-de og udstyrsmæssigt forenklede udgaver af kendte højtryksrensere til professionel brug, dvs. at kendte højtryksrensere til hobby-brug er behæftet med stort set samme ulemper som højtryksrensere til professionel brug - herunder også en rela-15 tiv høj pris. Af andre ulemper kan fremhæves, at de fleste højtryksrensere af denne type omfatter en el-motor, der altså kræver tilslutningsmuligheder til el-forsyning, og som sammenholdt med diverse vandtilslutninger også kræver stærkt fordyrende men helt nødvendige sikkerhedssystemer. Funktionen af 20 disse er imidlertid yderligere afhængig af, at også el-installationen på stedet omfatter godkendte sikkerhedsrelæer, hvilket desværre ikke altid er tilfældet, dvs. at der ofte er en vis risiko ved anvendelse af kendte højtryksrensere af den nævnte type.Such high-pressure cleaners are known in numerous embodiments for leisure purposes; but in reality these are usually dimensioned and equipment-simplified versions of known high-pressure cleaners for professional use, ie. that well-known high-pressure cleaners for hobby use suffer from almost the same disadvantages as high-pressure cleaners for professional use - including a relatively high price. From other drawbacks, it can be pointed out that most high-pressure cleaners of this type include an electric motor, which therefore requires connectivity for power supply, and which, in conjunction with various water connections, also requires highly expensive but absolutely necessary safety systems. However, the function of these 20 is further dependent on the fact that the on-site electrical installation also includes approved safety relays, which unfortunately is not always the case, ie. that there is often some risk in using known high pressure cleaners of the type mentioned.

2525

Opfindelsen har til formål at angive et pumpeaggregat af den indledningsvis nævnte art, og som indebærer en betydelig indretningsmæssig og teknisk forenkling, der desuden medfører en betjeningsmæssig forenkling - og det tilmed til stærkt reduce-30 rede fremstillingsomkostninger, som i sidste ende betyder en væsentligt prisreduktion.The invention has for its object to provide a pump assembly of the kind mentioned above, which entails a considerable device and technical simplification, which also entails an operational simplification - and in addition to greatly reduced manufacturing costs, which ultimately means a significant reduction in prices. .

Puppeaggregatet ifølge opfindelsen er ejendommeligt ved, at at lavtryksdelen har en cylindrisk hulhed, hvori en rotor med 35 perifere fortrængningsorganer, fortrinsvis i form af stempellignende fremspring, er således excentrisk lejret, at de stem-The puppet assembly according to the invention is characterized in that the low-pressure part has a cylindrical cavity in which a rotor with 35 peripheral displacement means, preferably in the form of piston-like projections, is so eccentrically mounted that

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2 pel ligende fremspring successivt kan trænge ind i og helt ud af pumpekamrene, der er udformet i pumpehuset langs periferien af hulheden, og som er forbundet med højtryksdelen via envejs-ventiler. Herved kan på enkel måde opnås en betydelig indret-5 ningsmæssig og teknisk forenkling, der desuden medfører en betjeningsmæssig forenkling - og det tilmed til stærkt reducerede fremstillingsomkostninger, som i sidste ende betyder en væsentlig prisreduktion.2 pillar-like projections can successively penetrate into and completely out of the pump chambers formed in the pump housing along the periphery of the cavity and which are connected to the high-pressure portion via one-way valves. In this way, a considerable device and technical simplification can be achieved in a simple way, which also results in operational simplification - and even at greatly reduced manufacturing costs, which ultimately means a significant reduction in prices.

10 Opfindelsen bygger på en teknik, ifølge hvilken en hurtigløbende rotor ved hjælp af en excentrik successivt samvirker med i princippet radiale pumpekamre placeret langs periferien af en cylindrisk hulhed, der udgør pumpeaggregatets lavtryksdel, og som tilføres pumpemediet, f.eks. vand. Pumpekamrene er alle 15 forbundet med en fælles højtryksdel, der er indrettet ved en cylindrisk yderside af pumpehuset, og som er indesluttet af en kappedel, der desuden danner et lukke for lavtryksdelen, og som er fastgjort ved ydersiden af pumpehuset på aftagelig måde, f.eks. ved hjælp af et antal bajonetlåse.The invention is based on a technique according to which a fast-running rotor, by means of an eccentric, successively interacts with, in principle, radial pump chambers located along the periphery of a cylindrical cavity constituting the low-pressure part of the pump unit and supplied to the pump medium, e.g. water. The pump chambers are all connected to a common high-pressure part arranged at a cylindrical outer surface of the pump housing, which is enclosed by a sheath portion which further forms a closure for the low-pressure part and which is fixed at the outside of the pump housing in a removable manner, f. eg. using a number of bayonet locks.

2020

Hensigtsmæssigt er pumpeaggregatet udformet således, at de stempellignende fremspring omfatter ydre elastiske dele, der er indrettet til at samvirke med uelastiske dele af pumpekamrene, f.eks. mundingsdele deraf.Conveniently, the pump assembly is designed such that the piston-like projections comprise outer resilient parts adapted to cooperate with inelastic portions of the pump chambers, e.g. portions thereof.

2525

Pumpemediet, f.eks. vand ved vandværkstryk, tilføres den cylindriske hulhed - lavtryksdelen, der altså er helt udfyldt med vand omkring rotoren. Når denne roteres og langs den cylindriske ydervæg af lavtryksdelen vil små portioner af vand 30 successivt blive indespærret i pumpekamrene og blive komprimeret deri, ved at pumpekamrenes effektive volumen formindskes ved hjælp af de stempellignende fremspring under rotorens passage. Ved at rotoren roteres med høj hastighed, f.eks. 5.000 - 15.000 o/min, vil der opbygges et højt tryk i højtryksdelen -35 for så vidt, der afledes vand derfra. Hvis der derimod ikke afledes vand fra højtryksdelen, vil rotoren blot rulle inak-The pumping medium, e.g. water at waterworks pressure, the cylindrical cavity is supplied - the low pressure part, which is thus completely filled with water around the rotor. As it is rotated and along the cylindrical outer wall of the low pressure portion, small portions of water 30 will be successively entrapped in the pump chambers and compressed therein by decreasing the effective volume of the pump chambers by the piston-like projections during the passage of the rotor. By rotating the rotor at high speed, e.g. 5,000 - 15,000 rpm, a high pressure will build up in the high-pressure section -35 as far as water is discharged therefrom. If, on the other hand, no water is diverted from the high-pressure part, the rotor will simply roll inlet

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3 tivt på en vandfilm langs ydervæggen af lavtryksdelen - svarende til en tomgangssituation.3 on a water film along the outer wall of the low pressure section - corresponding to an idle situation.

Hensigtsmæssigt er pumpeaggregatets pumpehus to-delt, idet det 5 består af en ydre cylindrisk, tyndvægget kappedel og af en indvendig ligeledes cylindrisk husdel, hvilken kappedel ved en side er indrettet til at indføres omkring den indvendige husdel og fastgøres væsketæt dertil, medens kappedelen ved modsatte side er forsynet med en tilførselsforbindelse for 10 pumperaediet, og at den cylindriske husdel ved en ende er udformet med en central akselføring for en aksel, der er forbundet med en excentrik for nævnte rotor, der er anbragt i nævnte hulhed, der er åben ud mod modsatte ende af husdelen, dvs. ud mod kappedelen, der desuden ud for den del deraf, der omslut-15 ter den indvendige husdel, er udformet med nævnte afgangsforbindelse.Conveniently, the pump assembly of the pump assembly is two-part, consisting of an outer cylindrical, thin-walled sheath portion and an inner likewise cylindrical housing portion, which sheath portion is laterally adapted to be inserted around the inner housing portion and fastened to the liquid portion thereof, while the cap portion is secured to it. side is provided with a supply connection for the pumping medium and the cylindrical housing part is formed at one end with a central shaft guide for a shaft connected by an eccentric for said rotor arranged in said cavity which is open towards opposite end of the housing part, ie. outwardly towards the casing portion, which is formed further with the portion thereof enclosing the interior housing portion with said outlet connection.

På særlig enkel måde kan pumpeaggregatet ifølge opfindelsen være udformet således, at nævnte envejsventiler, der forbinder 20 pumpekamrene med højtryksdelen, udgøres af i bunden af den rundtgående kanal udmundende radiale boringer og af et i bunden af kanalen anbragt elastisk ringformet legeme, f.eks et opdelt metalbånd med fjedre eller en O-ring.In a particularly simple manner, the pump assembly according to the invention may be designed such that said one-way valves connecting the pump chambers to the high-pressure part are constituted by radial bores opening at the bottom of the circumferential duct and by an elastically annular body arranged at the bottom of the duct, e.g. split metal band with springs or an O-ring.

25 Opfindelsen forklares i det følgende nærmere i forbindelse med tegningen, på hvilken:-The invention is explained in the following in connection with the drawing, in which: -

Fig.l viser anvendelsen af en bærbar udførelsesform for et pumpeaggregat ifølge opfindelsen, 30 fig. 2 viser en tilsvarende udførelsesform for et pumpeaggregat ifølge opfindelsen - forsynet med forbrændingsmotor - og set fra siden, 35 fig. 3 viser et endebillede af det i fig. 2 viste pumpeaggregat ifølge opfindelsen, fig. 4 er et endebillede - delvis i snit - af en udførelses form for en pumpedel til pumpeaggregatet ifølge opfindelsen, medensFig. 1 illustrates the use of a portable embodiment of a pump assembly according to the invention; Figure 2 shows a similar embodiment of a pump unit according to the invention - equipped with an internal combustion engine - and seen from the side; 3 is an end view of the embodiment of FIG. 2 illustrates the pump assembly according to the invention; FIG. 4 is an end view - partly in section - of an embodiment of a pump part for the pump assembly according to the invention, while

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4 5 fig. 5 er et sidebillede - delvis i snit - af den i fig. 4 viste pumpedel.FIG. 5 is a side view - partly in section - of the one shown in FIG. 4.

Som vist i fig. 1 - 3 er det primært ideen, at pumpeaggregatet ifølge opfindelsen fremstilles som et ret lille bærbart pum-10 peaggregat, der forsynet med forsynet med forbrændingsmotor kan anvendes helt uafhængigt af ekstern energiforsyning, dvs. et relativt let og kompakt aggregat, der kan anvendes overalt og til ethvert tænkeligt formål - herunder også til drift af tilsluttede hjælperedskaber, der kan drives af trykvæske, og 15 som alene kan styres ved on-/off regulering af væskestrømmen på højtrykssiden af pumpeaggregatet. Mellem en pumpeenhed 2 og en motorenhed 4 er eventuelt indskudt en kobling 6, f.eks. en sædvanlig centrifugalkobling omfattende en koblingsskål forbundet med pumpeenheden 2 og et sæt svingklodser forbundet med 20 motorenheden 4. Pumpeenheden 2 har en slangekobling 8 for tilledning af trykmedie, f.eks. vand ved vandværkstryk, til en lavtryksdel 10 samt en afgangsforbindelse 12 fra en højtryksdel 14 (fig. 5).As shown in FIG. 1-3, it is primarily the idea that the pump unit according to the invention is manufactured as a rather small portable pump unit, which can be equipped with an internal combustion engine, which can be used completely independent of external energy supply, ie. a relatively lightweight and compact unit that can be used anywhere and for any conceivable purpose - including for operating connected pressurized fluid-powered auxiliaries, and 15 which can only be controlled by the on / off control of fluid flow on the high-pressure side of the pump assembly. Optionally, a coupling 6 is inserted between a pump unit 2 and a motor unit 4, e.g. a conventional centrifugal coupling comprising a coupling cup connected to the pump unit 2 and a set of swing blocks connected to the motor unit 4. The pump unit 2 has a hose coupling 8 for supplying pressure medium, e.g. water at a water pressure, to a low pressure part 10 and a discharge connection 12 from a high pressure part 14 (Fig. 5).

25 Pumpeenheden 2, der er vist mere detaljeret i fig. 4 og 5, omfatter et to-delt cylindrisk pumpehus 16, der består af en husdel 18, der ved en side 20 er beregnet til sammenspænding med motorenheden 4 eventuelt via nævnte kobling 6, og som ved modsatte side er udformet med en cylindrisk hulhed 22, hvori 30 en rotor 24 er således drejeligt lejret på en excentrik 26, at rotoren 24 ved rotation af’ en med excentrikken 26 forbundet drivaksel 28 kan bringes til at rulle mod den cylindriske in-dervæg 23 af hulheden 22. Denne, der udgør pumpeenhedens lavtryksdel 10, er åben ud mod en kappedel 30, der er indført 35 omkring husdelen 18 og forbundet dermed på væsketæt måde ved en udvendig cylinderflade 32 af husdelen 18, idet kappedelen 5 DK Ί64Ί33 Β 30 desuden er fastgjort til husdelen 18 ved hjælp af et antal bajonetlåse 34. Mellem indersiden af kappedelen 30 og cylinderfladen 32 er ved begge sider af en rundtgående kanal 36 tilvejebragt O-ringstætninger, idet kanalen 36 udgør nævnte 5 højtryksdel 14. Kappedelen 30 er ud for lavtryksdelen 10 - som allerede nævnt - forsynet med slangekoblingen 8 for tilførsel af vand til hulheden 22, således at rotoren 24 kan være helt omsluttet af trykmedie - vand.The pump unit 2, shown in more detail in FIG. 4 and 5, comprises a two-piece cylindrical pump housing 16, which consists of a housing part 18, which at one side 20 is intended for clamping with the motor unit 4, optionally via said coupling 6, and which at the opposite side is formed with a cylindrical cavity 22 wherein a rotor 24 is rotatably mounted on an eccentric 26 so that by rotating a drive shaft 28 connected to the eccentric 26, the rotor 24 can be caused to roll against the cylindrical inner wall 23 of the cavity 22. This constitutes the pump unit low pressure portion 10, is open to a casing portion 30 which is inserted 35 around the housing portion 18 and is thus connected in a liquid-tight manner by an outer cylinder surface 32 of the housing portion 18, the cover portion 5 being further secured to the housing portion 18 by means of a housing. number of bayonet locks 34. Between the inside of the cap portion 30 and the cylinder surface 32, O-ring seals are provided on both sides of a circumferential channel 36, the channel 36 constituting said high pressure portion 14. The cap portion 30 is u. d for the low pressure part 10 - as already mentioned - provided with the hose coupling 8 for supplying water to the cavity 22, so that the rotor 24 can be completely enclosed by pressure medium water.

10 I husdelen 18 er der mellem lavtryksdelen 10 og højtryksdelen 14 langs med den cylindriske indervæggen 23 med ens indbyrdes afstand udformet pumpekamre 38, der indadtil er indrettet til at samvirke med rotoren 24, og som udadtil er forbundet med kanalen 36, dvs. højtryksdelen 14 via radiale kanaler 40 og 15 envejsventiler 42, der fortrinsvis dannes af mundinger af kanalerne 40 og et kraftigt elastisk ringlegeme 44, der er anbragt i bunden af ringkanalen 36 omkring husdelen 18.10 In the housing part 18, between the low-pressure part 10 and the high-pressure part 14 along the cylindrical inner wall 23 are spaced-apart pump chambers 38, which are arranged inwardly to cooperate with the rotor 24, which are connected externally to the channel 36, i.e. the high-pressure portion 14 via radial ducts 40 and 15 one-way valves 42, which are preferably formed by the mouths of the ducts 40 and a strong resilient annular body 44 disposed at the bottom of the annular duct 36 around the housing portion 18.

I fig. 4 er antydet fire pumpekamre 38 langs periferien af den 20 cylindriske hulhed 22 og rotoren 24, der i den viste udformning består af elastisk materiale, f.eks. gummi er tilsvarende udformet med tre fremspring 46, idet omkredsen af rotoren 24 er 3/4 af omkredsen af den cylindriske indervæg 23, dvs. at pumpekamrene 38 er indbyrdes forskudt 90° langs indervæggen 25 23, medens fremspringene 46 på rotoren 24 er indbyrdes forskudt 120° langs omkredsen af denne. Det forudsættes således, at der ikke forekommer skridning af betydning mellem rotoren 24 og indervæggen 23 af lavtryksdelen 10 eller hulheden 22; men der er naturligvis intet til hindring for, at der mellem 30 rotoren 24 og indervæggen 23 findes aktive styreorganer, f.eks. i form af tandkrans og tandhjul.In FIG. 4, four pump chambers 38 are indicated along the periphery of the 20 cylindrical cavity 22 and the rotor 24, which in the illustrated embodiment consists of elastic material, e.g. rubber is similarly formed with three projections 46, the circumference of the rotor 24 being 3/4 of the circumference of the cylindrical inner wall 23, i.e. the pump chambers 38 are offset 90 ° along the inner wall 25 23, while the projections 46 on the rotor 24 are offset 120 ° along the circumference thereof. Thus, it is assumed that there is no significant slip between the rotor 24 and the inner wall 23 of the low pressure part 10 or cavity 22; but, of course, there is nothing to prevent the active control means between the rotor 24 and the inner wall 23, e.g. in the form of gear and gears.

Eventuelt kunne en sådan styretandkrans kombineres med en fast statorring, der er indrettet til at fastgøre langs den cylin-35 driske indervæg 23, og som ud for pumpekamrene 38 er forsynet med særlige elastiske mundingsdele, der ved passage af en ro-Optionally, such a guide tooth ring could be combined with a fixed stator ring arranged to attach along the cylindrical inner wall 23 and which is provided with special elastic mouth portions for the pump chambers 38

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6 tordel af uelastisk materiale blev deformeret med henblik på effektiv reduktion af pumpekammervolumet og tilsvarende kompression af det i pumpekammeret indespærrede trykmedie.6 tiers of inelastic material were deformed for effective reduction of the pump chamber volume and corresponding compression of the pressure medium entrapped in the pump chamber.

5 Det skal fremhæves, at der ved pumpeaggregatet ifølge opfindelsen arbejdes med et meget lille effektivt volumen i størrelsesordenen ca. o,3 - 0,6 cm2 af de enkelte pumpekamre. Til gengæld arbejdes der med et relativt højt omløbstal for rotoren 24 i størrelsesordenen ca. 5 - 15.000 o/min. - og for-10 trinsvis uden noget gear mellem pumpe- og motorenhed.5 It should be noted that the pump unit according to the invention works with a very small effective volume in the order of approx. o, 3 - 0.6 cm2 of the individual pump chambers. On the other hand, a relatively high turnover of the rotor 24 is worked on the order of approx. 5 - 15,000 rpm. - and preferably 10 without any gear between pump and motor unit.

Det forventes desuden, at tilhørende hjælperedskaber, herunder håndbetjent strålerør, ikke behøver at omfatte trykreduktionsventiler, men kan betjenes ved simpel on-/off regulering via 15 direkte slangeforbindelse fra nævnte afgangsforbindelse.In addition, it is expected that associated auxiliary tools, including hand operated jet pipes, need not include pressure reducing valves, but can be operated by simple on / off control via 15 direct hose connection from said outlet connection.

Claims

A pump assembly, in particular a high pressure pump assembly, comprising a pump housing (16) having a plurality of pump chambers (38) and associated displacement means between a low pressure portion (10), wherein the pump medium, e.g. water is supplied, and a high-pressure part (14) having a discharge connection for an auxiliary tool, e.g. a hand-operated jet pipe, preferably comprising an engine unit (4) and optionally a coupling (6), characterized in that the low-pressure part (10) has a cylindrical cavity (22) in which a rotor (24) with peripheral displacement means, preferably in in the form of piston-like projections (46), is so eccentrically mounted that the piston-like projections (46) can successively penetrate into and completely out of the pump chambers (38) formed in the pump housing (16) along the periphery of the cavity (22), and which is connected to the high pressure part (14) via one-way valves (42).

Pump assembly according to claim 1, characterized in that the piston-like projections (46) comprise outer resilient parts arranged to cooperate with inelastic parts of the second pump chambers (38), e.g. portions thereof.

Pump assembly according to claim 1, characterized in that the pump housing (16) is two-part, consisting of an outer cylindrical, thin-walled casing part (30) and of an internal likewise cylindrical housing part (18), said casing part (30). is arranged on one side to be inserted around the inner housing part (18) and is secured tightly therewith, while the cap part (30) is provided on the opposite side with a supply connection (8) for the pump medium and the cylindrical housing part (18) at one end 30 is provided with a central shaft guide for a shaft (28) connected to an eccentric (26) for said rotor (24) disposed in said cavity (22) open to opposite end of the housing portion ( 18), i.e. towards the sheath portion (30), which is formed further with the portion thereof enclosing the inner housing portion (18), 35 with said outlet connection (12). DK 164133 B 8

Pump assembly according to claims 1 and 3, characterized in that the inner housing part (18) is provided at its outer side with a circumferential channel (36) constituting said high pressure part (14), the annular channel (36) being in a liquid-tight manner. enclosed by said sheath portion (30) wherein the outlet connection (12) is provided.

Pump assembly according to claims 1 and 3, characterized in that said one-way vent in clay connecting the pump chambers (38) 10 to the high-pressure part (14) is constituted by radial bores (40) opening at the bottom of the circumferential duct (40). arranged at the bottom of the channel (36) resilient annular body, e.g. a split metal band with springs or an O-ring (44).