DK167708B1

DK167708B1 - DIVING ENGINE PUMP UNIT

Info

Publication number: DK167708B1
Application number: DK407585A
Authority: DK
Inventors: Christian Schmidt; Horst Schaefer
Original assignee: Klein Schanzlin & Becker Ag
Priority date: 1984-09-14
Filing date: 1985-09-06
Publication date: 1993-12-06
Also published as: EP0176743B1; DK407585A; DK407585D0; EP0176743A1; ATE44804T1; DE3571676D1; JPS6172895A; DE3433770A1

Abstract

1. Motor-driven pump set with an impeller arranged on its pump shaft and a torque-secured planetary gearing sitting between the driving motor and said pum shaft, said pump shaft running in a fixed bearing in the pump casing and with said planetary gearing as a loose bearing in the motor-driven pump set, the planetary gearing being journalled in the motor-driven pump set, characterized by the motor-driven pump set being engineered as a submersible motor-driven pump set with an axial impeller (3), by the planetary gearing (5) being engineered as a reduction gear, by a coupling (12) transmitting the bending moments, arranged between pump shaft (4) and output shaft (11) of the planetary gearing (5), and by the planetary gearing (5) shifting axially.

Description

DK 167708 B1 iDK 167708 B1 i

Opfindelsen vedrører et dykmotorpumpeaggregat ifølge krav l's overbegreb.The invention relates to a submersible motor pump unit according to the general concept of claim 1.

Sådanne dykmotorpumpeaggregater anvendes til pumpning af store væskemængder ved små pumpehøjder. For 5 at opnå de til anvendelsen af aksialskovlhjul nødvendige omdrejningstal er det hensigtsmæssigt at anvende et reduktionsgear mellem drivmotoren og aksialskovlhjulet ved pumper med lave omdrejningstal. Herved kan man undgå at anvende mangepolede og dermed langsomløbende og hvad 10 diameteren angår store drivmotorer. Ved hjælp af reduktionsgear er det muligt at benytte de i handelen i større antal værende hurtigløbende og billigere motorer med få poler. Anvendelsen af reduktionsgear medfører dog en betydelig udgift i forbindelse med 15 lejringen af pumpeakslen, udgangsakslen og gearelementerne .Such submersible pump units are used for pumping large amounts of liquid at small pump heights. In order to achieve the speeds required for the use of axial impellers, it is expedient to use a reduction gear between the drive motor and the axial impeller for pumps with low speeds. This makes it possible to avoid using multi-pole and thus slow-moving and, as far as the diameter is concerned, large drive motors. With the help of reduction gears, it is possible to use the commercially available larger numbers of fast-running and cheaper motors with few poles. However, the use of reduction gears entails a significant expense in connection with the bearing of the pump shaft, the output shaft and the gear elements.

Det er opfindelsens opgave at udvikle en billig statisk bestemt lejring for et kompakt dykmotorpumpeag-gregat. Opgaven løses ifølge krav l’s kendetegnende del.It is the object of the invention to develop an inexpensive statically determined bearing for a compact submersible motor pump unit. The task is solved according to the characteristic part of claim 1.

20 Med denne løsning er det blevet muligt at arrangere pumpeakslen med blot et enkelt leje i pumpehuset, og som følge af den bøjningsmomentoverførende kobling mellem pumpeakslen og planetgearet at lade planetgearhuset danne det andet pumpeakselleje. Da planetgearét sædvan-25 ligvis har flere lejer inde i gearhuset, kan de på pumpeakslen virkende kræfter optages og overføres til planetgearhuset. Den af pumpeakslen og planetgearet dannede konstruktive enhed har således et fast leje inden i pumpehuset og et bevægeligt leje dannet af 30 planetgearhuset.With this solution it has become possible to arrange the pump shaft with only a single bearing in the pump housing, and as a result of the bending torque transmitting coupling between the pump shaft and the planetary gear to let the planetary gear housing form the second pump shaft bearing. Since the planetary gear usually has several bearings inside the gear housing, the forces acting on the pump shaft can be absorbed and transmitted to the planetary gear housing. The structural unit formed by the pump shaft and the planetary gear thus has a fixed bearing inside the pump housing and a movable bearing formed by the planetary gear housing.

En udførelsesform af opfindelsen er ejendommelig ved, at drivmotoren er forbundet med planetgearets indgangsaksel via en mellemliggende fleksibel kobling.An embodiment of the invention is characterized in that the drive motor is connected to the input shaft of the planetary gear via an intermediate flexible coupling.

Derved udelukkes en statisk ubestemt lejring i aggrega-35 tet som helhed.This excludes a static indeterminate bearing in the unit as a whole.

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En anden udførelsesf orm af opfindelsen er ejendommelig ved, at drivmotoren er forbundet direkte med planetgearhuset og med dettes indgangsaksel eller med planetgearets stillestående ringhjul og indgangsakslen.Another embodiment of the invention is characterized in that the drive motor is connected directly to the planetary gear housing and to its input shaft or to the stationary ring gear of the planetary gear and the input shaft.

5 På denne måde kan aggregatets byggelængde formindskes væsentligt, og ved anvendelse af f.eks. en hydraulisk drivmotor optages dennes vægt direkte af planetgearets hus. De i planetgearet anvendte lejer og pumpeakslens faste leje må dimensioneres eller udformes under 10 hensyntagen til vægten af den hydrauliske drivmotor.In this way, the construction length of the unit can be significantly reduced, and by using e.g. a hydraulic drive motor, its weight is absorbed directly by the planetary gear housing. The bearings used in the planetary gear and the fixed bearing of the pump shaft must be dimensioned or designed taking into account the weight of the hydraulic drive motor.

En yderligere udførelsesform af opfindelsen er ejendommelig ved, at et med planetgearhuset samvirkende på pumpehuset eller lanterneringen anbragt anslag begrænser aksialbevægelsen af planetgearhuset. Ved denne 15 forholdsregel kan der overholdes klart definerede tilstande inde i dykmotorpumpeaggregatet.A further embodiment of the invention is characterized in that a stop arranged with the planetary gear housing cooperating on the pump housing or the lantern restricts the axial movement of the planetary gear housing. With this precaution, clearly defined conditions can be observed inside the submersible pump unit.

Ifølge en yderligere udførelsesform af opfindelsen er lejringen af planetgearets udgangsaksel tilvejebragt i området ved planetgearhusets eller det stillestående 20 ringhjuls lejeplan. Herved optages eventuelt optrædende radialt virkende momenter via lejet og planetgearelemen-teme.According to a further embodiment of the invention, the bearing of the output shaft of the planetary gear is provided in the area of the bearing plane of the planetary gear housing or stationary ring gear. Hereby any occurring radially acting moments are recorded via the bearing and the planetary gear elements.

En yderligere udførelsesform er ejendommelig ved, at planetgearhusets eller det stillestående ringhjuls 25 momentoptagende understøtning er støddæmpende. Stød, stammende fra det pumpede medium og overført via pumpeakslen, mildnes ved hjælp af anslag, som f.eks. gummibuffere, fjederelementer, støddæmpere eller lignende, med hvilke planetgearhuset er sikret mod 30 drejning. Det samme gælder for de under starten af dykmotorpumpeaggregatet optrædende belastninger.A further embodiment is characterized in that the moment-absorbing support of the planetary gear housing or the stationary ring gear 25 is shock-absorbing. Shocks, originating from the pumped medium and transmitted via the pump shaft, are mitigated by means of stops, such as rubber buffers, spring elements, shock absorbers or the like, with which the planetary gear housing is secured against 30 turns. The same applies to the loads occurring during the start of the submersible motor pump unit.

I det følgende forklares opfindelsen ved hjælp af flere udførelseseksempler og med henvisning til tegningen, på hvilken 3 DK 167708 B1 fig. 1 viser et elektromotordrevet dykpumpeaggregat med et lukket planetgear, fig. 2 et aggregat som i fig. 1, men med et åbent planetgear, og 5 fig. 3 et dykmotorpumpeaggregat med hydraulikmotor.In the following, the invention is explained by means of several exemplary embodiments and with reference to the drawing, in which fig. 1 shows an electric motor driven submersible pump unit with a closed planetary gear, fig. 2 shows an assembly as in fig. 1, but with an open planetary gear, and FIG. 3 a submersible pump pump unit with hydraulic motor.

Fig. 1 viser et dykmotorpumpeaggregat bestående af en elektrisk drivmotor 1 og et i pumpehuset 2 placeret aksi al skovlhjul 3. Et planetgear 5 er placeret mellem motoren 1 og pumpeakslen 4 med 10 aksialskovlhjulet 3. Planetgearet 5, der danner en kompakt konstruktiv enhed, består af indgangsakslen 6, der er forbundet med motoren 1 via en mellemliggende fleksibel kobling 7. Planetgearet 5's hus 8 er stift eller elastisk sikret mod drejning i lanternerin-15 gen 9, der bærer motoren 1, men er lejret, så det er aksialt forskydeligt. En mellem huset 8 og lanterneringen 9 placeret gummiring 10 tjener til dæmpning af vibrationer og til tætning af en eventuelt anvendt oliesump, der benyttes i forbindelse med køling og 20 smøring. Planetgearet 5's udgangsaksel er forbundet med pumpeakslen 4 via en bøjningsmomentoverførende krympeforbindelse 12.FIG. 1 shows a submersible pump assembly consisting of an electric drive motor 1 and an axial impeller located in the pump housing 2. A planetary gear 5 is located between the motor 1 and the pump shaft 4 with the axial impeller 3. The planetary gear 5 forming a compact structural unit consists of the input shaft 6, which is connected to the motor 1 via an intermediate flexible coupling 7. The housing 8 of the planetary gear 5 is rigid or elastically secured against rotation in the lantern ring 9, which carries the motor 1 but is mounted so that it is axially displaceable. A rubber ring 10 placed between the housing 8 and the lantern ring 9 serves to dampen vibrations and to seal any oil sump used in connection with cooling and lubrication. The output shaft of the planetary gear 5 is connected to the pump shaft 4 via a bending torque transmitting crimp connection 12.

Pumpeakslen 4 er i pumpehuset 2 fastholdt i et radialleje 13 og vinkelkontaktlejer 14, der sammen 25 udgør det faste leje. På grund af den bøjningsmoment-overførende kobling 12 og lejringen i planetgearet 5, virker planetgearets hus 8 som et andet pumpeaksel leje, dvs. det løse leje.The pump shaft 4 is held in the pump housing 2 in a radial bearing 13 and angular contact bearings 14, which together form the fixed bearing. Due to the bending torque transmitting clutch 12 and the bearing in the planetary gear 5, the housing of the planetary gear 8 acts as a second pump shaft bearing, i.e. the loose rent.

Den i fig. 2 viste dykmotorpumpe svarer i hoved-30 sagen til den i fig. 1, blot er planetgearet 5 udført, så det er åbent i retning mod aksialskovlh julet. Udgangsakslen 11 er her lejret i området ved planetgearets lejeplan. Ekstramomenter i gearet holdes således så små, at de er uvæsentlige. En mellem udgangsakslen 35 11 og pumpehuset 2 placeret tætning gør det muligtThe device shown in FIG. 2 corresponds in the main case to the one shown in fig. 1, the planetary gear 5 is simply made so that it is open in the direction of the axial paddle. The output shaft 11 is here mounted in the area of the bearing plane of the planetary gear. Extra torques in the gear unit are thus kept so small that they are insignificant. A seal located between the output shaft 35 11 and the pump housing 2 makes it possible

Claims

Submersible pump assembly, on the pump shaft of which there is an axial impeller, and in which a reduction gear is engaged between the drive motor and the pump shaft, characterized in that it has a planetary gear (5) acting as a reduction gear located rotatably and axially displaceable in the pump housing (2) and / or in a lantern ring (9) carrying the drive motor 25 (1), that a bending torque transmitting coupling (12) is located between the pump shaft (4) and the output shaft (11) of the planetary gear (5), and that the pump shaft ( 4) is mounted in the submersible motor pump assembly with a bearing (13, 14) located in the pump housing (2) as a fixed bearing and with the planetary gear housing (8) as a movable bearing.

Submersible pump assembly according to claim 1, characterized in that the drive motor (1) is connected to the input shaft (6) of the planetary gear (5) via an intermediate flexible coupling (7). DK 167708 B1 5

Submersible pump assembly according to claim 1, characterized in that the drive motor (1) is connected directly to the planetary gear housing (8) and to its input shaft (6) or to the stationary ring gear and input shaft (6) of the planetary gear (5).

Submersible pump according to any one of the preceding claims, characterized in that a stop cooperating with the planetary gear housing (8) arranged on the pump housing (2) or the lantern ring (9) limits the axial movement 10 of the planetary gear housing (8) or of the stationary ring wheel.

Submersible drainage sump pump according to any one of the preceding claims, characterized in that the bearing of the output shaft (11) of the planetary gear (5) is provided in the area of the bearing plane of the planetary gear housing (8) or the stationary ring gear.

5 In addition to a reduction in the number of parts, this also entails a reduction in the manufacturing cost. FIG. 3 shows a particularly compact submersible motor pump unit in which a motor 17 directly connected to the planetary gear 5 is arranged. In this case, the weight of the motor loads the housing 8 of the planetary gear, and it must be ascertained whether the bearings used are sufficient or not. they must be of a different size. The supply and discharge of the energy-transferring hydraulic fluid takes place 15 via the lines 18. The rubber blocks 19 serve to absorb the torque.

Submersible drainage sump pump according to any one of the preceding claims, characterized in that the obstruction of the planetary gear housing (8) or the stationary ring gear is shock-absorbing.