DE2327262A1 - CENTRIFUGAL PUMPS FROM INTERCHANGEABLE MODULAR PARTS - Google Patents

Description

PATENT LAWYERS D (L-ING.RICHARD GLAWE - DIPL.-ING.KLAUS DELFSDlPL-PriVS.DR.WALTER MOLL MUNICH HAMBURG MUNICH

2327282

8 MONGHEN 26 2 HAMBURG 52

PO Box 37 WAITZSIR. 12th UEBHERRSTR. 20 TEL (04U) 89 22 55 TEL. (0811) 22 «5 48 TELEX 212921 save YOUR SIGN YOUR MESSAGE FROM OUR SIGN HAMBURG

REGARDS,

Worthington Corporation, 4ol Worthington Avenue, Harrison,

New Jersey o7o29, USA

Centrifugal pumps made from interchangeable modular parts

Although centrifugal pumps are known with interchangeable parts requires the provision of a wide range of different centrifugal pumps, each for a different type of pump use is suitable, the production and storage of a correspondingly large one Variety of completed pumps, what a big one Competitive disadvantage from a financial point of view

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is because the money is tied up in storage.

With these known centrifugal pumps, in which the main pump parts are interchangeable, it has been found that the replacement of one or more of these main pump parts with other and different ones Parts to adapt the same centrifugal pump to substantially different pump uses, in general includes relatively expensive and tent-robbing measures and requires the use of specially manufactured connectors or the like to achieve the desired To achieve change.

The present invention overcomes this problem in-that a wide variety of permanently coupled and detachable coupled Centrifugal pumps are proposed for a group of different types of pump use that require separate, different and independent forms of housings, impellers, drives for the impellers including the require output shafts connectable to the impellers, connectors and sealing means for the output shafts; each of these elements is easily and conveniently interchangeable with other like elements * without the Production and storage of a large number of complete Pumping would be required.

The tightly and detachably coupled centrifugal pumps of the present invention only require readily available,

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relatively simple parts with checked during manufacture Reliability, so that any pump formed from such replaceable elements will be satisfactory and maintenance-free pumps and with centrifugal pumps on the market that are manufactured for the same purpose be competitive.

The present invention therefore relates to equipment with centrifugal pumps that are optionally fixed and detachable to provide from interchangeable modular parts, which a multitude of different, interchangeable housings, each having an identical rear opening, a multitude of different interchangeable Impellers, each of which is housed in each of the housings can be a variety of different interchangeable Drive shafts, each of which is inserted into each of the housings and operative therein with each of the impellers can be connected to a variety of different, interchangeable connectors, each of which has identical connector means at one end to enable any given connector to the rear end of each of the housings can be connected various interchangeable drive means, from each of which are connected to each of the connectors and each of the pump drive shafts for driving the pump may, and includes various interchangeable seals which, with a selected connector, serve to achieve the to close the rear opening of the selected housing,

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wherein at least one connector and an associated seal between a selected housing and a selected drive can be connected to form the desired firmly coupled centrifugal pump, and at least one other connector and associated seal in place of the first mentioned a connector and the associated Seal optionally and alternately connectable for attachment between a selected one Housing and a selected drive are to form a releasably coupled centrifugal pump.

The above and other objects and advantages of the invention are presented in the following detailed description in connection with the attached figures' explained in more detail ·

Figure 1 is a side view of a tightly coupled pump in accordance with the present invention.

FIG. 2 is an end view of the pump of FIG.

Figure 3 is a vertical section through the pump of Figure 1.

Figure 4 is an exploded view of the pump of Figures 1 through 3 * with parts cut away and parts are shown in cross-section.

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Figure 5 is a vertical section through the inlet the pump of Figures 1 to 4 with an optionally to be installed Feed wheel. ■

Figure 6 igt a side view of a releasably coupled Pump according to the invention with an open bearing housing.

Figure 7 is an end view of the pump of Figure 6;

Figure 8 is a side view of a closed bearing housing for an alternative type of use of the pump according to FIG. 6.

FIG. 9 is a vertical section through the pump of FIG Figure 6, but with a closed bearing housing according to Figure 8..

Figure Iq is a side view of a modified embodiment of the closed bearing housing of Figure 8 with parts partially cut away and partially in section.

FIG. 11 is an exploded view of the pump of FIG Figure 9 with partially broken away parts and partially Share in cut.

Figure 12 is a vertical section taken along line 12-12 of Figure 9 to the support that comes with the connector connected to show.

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Figure IJ is a vertical section through part of the Pump housing of Figure 9 * the use of a jacket-less impeller and an adjustable jacket ring, the are arranged to show. ,

FIG. 14 is a side view of another embodiment of a tightly coupled pump according to the invention, which has an integral connector.

Figure 15 is a side view of another embodiment of the pump housing.

FIG. 16 is a side view of a vertically arranged, releasably coupled pump according to the invention
partially broken away parts to show the rear part of the housing.

Figure 17 is a rare view of a combination of one
two! piece connection piece with a pump housing "
partly in cut.

Figures 18 and 19 represent side views of the two parts
of the connector of Figure l6.

FIG. 2o is a further embodiment of a vertically arranged, releasably coupled pump in section.

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In Figures 1 to 4 is a tightly coupled centrifugal pump 3o constructed in accordance with the present invention and operating in accordance with the invention is shown; and which has a pump housing Jl.

The pump housing Jl is generally cylindrical in shape and has a common intake port 32 provided with an internal thread 33 and an outlet port 3 ^ · The side opposite to the intake manifold 32 forms a rear opening 35 * which has an annular shoulder 36, which has a shoulder, as shown at 37, has. The shape of that rear opening is, though relatively simple, important because it serves as one of the means the interchangeability of the housing with any desired Allow shapes of connecting pieces 38.

The connecting piece 38 is in one piece, .With the pump is driven through this connecting piece by an electric motor 4o, as detailed below is described. Supports 42 and 44 are on Pump housing 3I or on the housing of the electric motor 4o, so that this embodiment of the pump in alignment on any suitable bracket or base plate not shown is, can be held.

The one-piece connecting piece 38 has a cup-like shape, as shown in FIGS. 3 and 4 and around-

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summarizes an end wall portion 42, the one disposed therein

and housing wear ring 44 possesses the assembly shown in FIG Position forms the rear cover plate of the pump housing. The connector 38 is on the pump housing 32 fastened with screws 46 extending through a flange on the connector into threaded bores 47 in the pump housing. In the same way it is Connection piece with the housing of the drive motor 4o connected by screws 5o, which are through the splash 52 of the connector into suitable threaded holes Bores 5I extend in the motor housing P-ass connection screws 53 and 55 are provided on the pump housing 32.

The motor drive shaft is indicated at 5 ^ and extends through the connector 38 into the pump housing 3I · The centrifugal pump impeller is indicated at 56 and is of the jacketed type. The impeller 56 includes compensation passages 57 and is attached directly to the motor drive shaft by means of a screw 58 and a split pin 59. A housing wear ring 60 is located in the pump housing yi adjacent the front end of the impeller 56.

A flexible mechanical seal, generally designated 62 is indicated, is located in a seal housing 63 which forms a whole with the one-piece connecting piece 38. The seal 62 is made up of a rotatable shaft sleeve

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carried and comprises a spring assembly 66 and 'a sealing ring 68 which is connected to a non.'. ..: rotatable seat Jo carried by connector 38 is pressed into sealing contact.

FIG. 5 shows an optionally installable leading wheel J2 with an extracted helical shape, which is fastened to the end of the drive shaft 54 directly in front of the impeller 56 by a screw Jk. The screw 74, instead of the screw 58, holds the feed wheel and the impeller 56 on the shaft 54.

A releasably coupled or separately mounted pump according to the invention is shown in Figures 6, _9, 9 and 11 at 80 and comprises a pump housing 82, a two-piece connector 84, a bearing housing 86 and an electric drive motor 88. The latter comprises a shaft 9o , which have a quick-release coupling 92 with the pump drive shaft. 9 ^ is coupled.

Feet 96, 98 and loo are on the pump housing 82 on the connector 84 or on the drive motor 88. The foot 98, which is connected to the connector 84, under ^ - differs from the previously common type of attachment, in which the centrally located foot under the bearing housing of the releasably coupled pump assembly was attached.

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When feet were placed under the bearing housing, the bearing housing distorted around the drive shaft.

The whole effect of the insertion of the centrally arranged Feet 98 * as shown in Figures 6 and 9, provided is that the overhang bending stress of the bearing housing around the shaft by half The effect of this change is to reduce the support stress on the bolts that hold the bearing housing connect with the connector to reduce, as will be described in more detail below.

Furthermore, the effect of this change in the support is to exclude possible internal twisting in the bearing housing or to secure yourself against it.

In addition, the centrally located foot 98 provides space for the cooling jacket around the bearing housing, which is also described in more detail below. The centrally arranged foot 98 is shown in FIGS. 6, 9j H ^and 12 as a primarily solid float body, which is generally designated 99 and, when installed, is angled in the longitudinal direction to the pump 84. At one end there is an arcuately curved flange portion 99 a, which has such a shape that it flush surrounds the curved outer surface of any associated connecting piece and an-

sine

is and to which it is attached by a suitable centrally located screw 99 b, which is through the flange 99 a

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extends into a threaded bore 99 c. On the flange «!! 99 a remote end is located a pair of spaced apart legs 99 d and 99 e, which are provided with feet 99 f and 99 'g.

The pump housing 82 includes a flanged one Intake port Io2 and an outflow port Io4 provided with a flange.

In the case of a tightly coupled pump Jo, as described above is the housing 82 with a substantially similar rear opening 83 * an annular extension 83 a and a shoulder 83 b provided that the two-piece Connector 84 receives.

The two-piece connector 84 consists of a generally cylindrical housing I06 having a core-like portion I08 secured therein, which in turn includes the rear plate Ho of the pump housing 82 and a shaft sealing member 112 made in one piece therewith. An O-ring 114 provides the required seal between the member 112 and the housing I06, while casing wear rings II6 and II7 in, ^s Ho rear plate and the pump housing 82. Near-

are
reasonable reasons appropriate. The connector 84 is attached to the pump housing 82 with screws II8 which extend through a flange 12o into the housing. Drain screws 119 and 121 are on the pump housing 82 and on the

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binding piece 84 provided.

The drive shaft for the pump is denoted by 12o and executed in stages. The shaft 12o extends from the coupling 92 through the bearing housing 86 and the connector 84 into the pump housing 82. A shrouded impeller 122 with compensation passages 124 is attached to the shaft 12o with a split pin 126 and a nut 128, which is screwed onto a threaded shaft extension 129 and washer 13o.

A sealing device, indicated generally at 132 is located in connector area 112. The sealing device 132 works in a recognizable way with a rotating shaft sleeve 134 together to prevent leakage of the To avoid pumping liquid, the sealing means comprises sealing members I36, 138 and 14o which are tight compressed and in place by a sealing nut 142 and a fastening screw 144, which extends through a threaded opening 146, which is provided for this in the sealing nut, extends Sealing part I38 comprises at a distance from one another arranged openings 148, the for supplying the pump liquid as a lubricant for the sealing device therein while partially threaded fluid passages 150 are formed in connector area 112 are provided which engage each opening 148 and enable liquid to be supplied to them.

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A closed bearing housing, generally designated I52, has a generally cylindrical housing 15 ¹ I- * which has ball bearings 156 and 158 which are attached to the two opposite ends of the housing by retaining rings 157 and 159. Housing 154 is secured to connector housing I06 by bolts I60 that extend through tabs 16I and 1662 located on the bearing housing and connector housing, respectively.

End caps 164 and 166 are on the opposite two Ends of the bearing housing 152 provided to the interior to be sealed from this, and are attached to this housing by screws 168 and 170 attached. Seals 172 and 174 are on the passage of the drive shaft through the end caps. In use, the bearing housing 154 is partially with filled with an oil suitable for lubrication, with splash rings I76 and I78 arranged at a distance from one another on the drive shaft 12o to cause the oil to circulate through bearings 156 and 158 .. The rear end of the driveshaft I80 has a keyway formed therein

180 to secure the shaft to the coupling 192.

Especially for use under severe conditions or when used in a particularly hot environment an annular water cooling jacket 181, shown in phantom in FIG is shown, with a cooling passage as in

181 a provided around the bearing housing so that the cooling water

can flow through this to cool the bearing housing. 30 & 850/0476

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An embodiment of the closed bearing housing that is modified or that is suitable for use under difficult conditions is shown in FIG. The construction is essentially similar to that of the bearing housing 15? - » wherein the same parts are provided with the same reference numerals.

The bearing housing 182 differs from the bearing housing 152 in that there are double ball bearings at each end of the housing 154 is provided and the end cap 164 'is changed to to be able to incorporate this double arrangement.

In figure Io only one of the two double ball bearings is with Ball bearings I83 and 184, which are in the end cap 164 'through an end flange I86 around the open end of end cap 164 ' are held, shown.

The end cap is provided with a circumferential flange I87, through the screws I88 to hold the end cap 164 * in position relative to the housing 154 * by one Provide suitable storage for the drive shaft 12o.

The modified connection of the end cap l64 ^f facilitates assembly and replacement and provides better support for the ball bearings I85 and 184.

The use of an open impeller with a replaceable shroud in a selected pump housing as in the pump housing 82 is shown in Figure Ij5.

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The open impeller 1st with I92 and the exchangeable one Sheath ring designated with 19 ^. The replaceable shroud is held in the housing 82 by screws I96.

The versatility of the present invention comes in This arrangement expresses itself as it allows the same housing with a jacketed or enclosed Use an impeller or an uncovered or open impeller.

The replaceable shell element is subject to wear and can easily be replaced when the Pumpa is with a open impeller is used. However, the pump can be converted into a jacketed impeller or back into a can be converted with an open impeller depending on how the user of the pump selects or requests them.

This represents a major departure from normal commercial practice where two housings are constructed one for an open impeller and another for a jacketed or closed impeller, the interchangeable Shell assembly of the present invention allows the construction of a single housing that is interchangeable is suitable for both wing arrangements.

Another form of tightly coupled pumps is shown in Figure lh , generally labeled 197, and has a pump housing 198 _# which has a one-piece connection

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piece 2oo is connected to an electric motor 2o2 feat. In this embodiment, the entire pumping device is supported by a stand 2o4, which is part of the connecting piece 2oo is worn.

A slightly different embodiment of the pump housing is shown in Figure 15 at 2o6, and has associated Support legs 2o8, which are arranged on each side of this are, of which, however, only one leg is visible in FIG.

In Figure 16 is a vertically disposed, releasably coupled pump according to the invention, indicated generally by 2Io is shown and comprises a pump housing 213., the one flanged spiral inlet port 212 and a flanged central outlet port 21J.

The arranged in the direction of pumping pumping ^ housing 211 has similar to the pump housing Jl and 8l a substantially similar rüokwärtige opening 214 with an annular shoulder 215 and a shoulder 216 to a connector, such as a two-piece connector 218 to receive. The two piece connector 218 is mounted around the pump drive shaft 22o.

An electric drive motor 222 is above the connector 218 arranged. The motor 22o has an

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Drive shaft 224, when using the illustrated Shape of the connector with the pump drive shaft a quick release coupling 226 is coupled. A support for the pump 21o is in the form of support feet 228 and 23o extending downward from the bottom of the housing 211 trek, and support legs 2J52 and 234 are provided, which extend from the The bottom of the housing 212 extend downward. ..

The two piece connector 218 of Figure 16 is shown in greater detail in Figures 17, 18 and 19 in FIG Relation to another embodiment of the pump housing, which is designated by 236 and a flanged one Intake manifold 2J8 and a flanged radial Has outflow nozzle 24o is shown.

The connector 218 has a cylindrical housing 242. A kea-like part 244 in the cylindrical housing 242 is attached, also serves as a rear Plate 246 of the pump housing 236 and has a section 248 for attaching the shaft seal.

The connector 218 is on the pump housing 236 with the help fastened by bolts 250 extending through a flange 252 extending on connector housing 242 is located.

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Figure 2o shows a further arrangement, making use of the Versatility of the present invention, one being vertically arranged pump is connected to a remote drive means.

The pump housing 27o comprises a suction port 271 and a pump chamber 272 as well as a radially extending one Outlet nozzle 275

The housing 27o is open at the rear end and provided with a flange 274 inside the open end, the one annular shoulder 275 and a shoulder 276 forms which are identical in their design to the rear openings all previously set forth in the present invention and housing is described.

Support legs such as at 277 and 278, which engage housing 270, can be used to support the pump assembly be used.

A two-piece connector which is generally designated by 280, serves to close the rear opening of the pump housing _27o> in-which it is connected thereto, while at the end of the connecting piece, which is remote from the end connected to the pump housing 270, with one end an elongated tube 281 is connected, which in turn is connected to the bottom of a coupling brace 282

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is connected for a drive means not shown.

The connector 280 includes an outer, generally cylindrical housing 283, which at its ends with Flanges 284 and 285 is provided. The splash 284 is over set back a predetermined distance from the end, sq that the connector has an inner core portion 286 engaged 'can hold with the shoulder 276 of the housing 27o, when mounting screws extend through the tab 284 and connect the connector to the rear end of the pump housing 27o.

The core 286 includes the rear plate 287 for the pump chamber and provides a suitably lubricated bearing 288 extends Zung 282 for the output shaft 289, which does perpendicularly from a suitable bearing 290 in the ¹ Ko.pplungs abs.

The output shaft 289 extends longitudinally, the elongated Tube 281 through the bearing 288 and the core 286 into the pump chamber 272, where the impeller 291 with its end connected by a screw 292, for example.

t -

A very wide variety of combinations of pump housings, Impellers, spacers and / or bearing housings that are different from those exemplified above are of course possible.

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If more specifically a particular purpose require, for example, a tightly coupled, vertically disposed pump, so it can be seen immediately that the one-piece intermediate piece 38 of FIG it 3 ^m of the two-piece intermediate piece 218 reversed from Figure 15 for use with a pump housing 212 of the latter figure can.

Conversely, should a releasably coupled pump with threaded suction and discharge ports be required be, it is immediately apparent that the two-piece intermediate piece 84 of Figure 9 with the one-piece intermediate piece 38 of Figure 3 for use with a pump housing 3 ^ of the latter figure can be interchanged. If in one Another example of a releasably coupled pump with a La-? gergehäus'und a pump housing 32 and an impeller of Figure 3, for example, for use with high loads is required, the two-piece intermediate piece 84 and the bearing housing 182 of Figure lo. be interchanged with the connecting piece 38 of FIG.

Indeed, a major advantage of the centrifugal pumps of the present invention is that the various Design of the pump housing, pump drive shafts, Pump drives, pump impellers and connectors are interchangeable, in order to create an available assembly group of pumps for a multitude of applications

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or a group of different pump applications to deliver without the need to manufacture and maintain a large stock of various complete pumps would be required.

Although the invention has been described in terms of the preferred embodiment, it will be understood that the Invention also shown and described differently than preferably can be carried out and that certain changes in the shape and arrangement of the parts and in the specific Way of realizing the invention 'not from the invention can lead out.

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Claims (1)

Pat s t _t a nsprüche Equipment for creating centrifugal pumps, marked by a. a pump end that supports a multitude of different, selectable and interchangeable impellers (56, 122, 192, 291) and a variety of selectable and exchangeable housings (Jl, 8l, I98, 2ö6, 211, 2 ^ 6, 270), each one identical have rear opening (35 * 83, 214), b. an output shaft (5 ¹ ^ 9 ^ ₉ 12o, 22o, 289) to extend into a selected housing (3I, 8l, 198, 2o6, 211, 256, 270), c. one of the selectable and interchangeable impellers (56, 122, 192, 291 ) _s that in one of the selectable and interchangeable arrangements associated with this output shaft. ( ^ k, 9k, 12o, 22o, 289) connected and rotatable in the assembled position, is arranged, d. a variety of different, 'selectable and interchangeable Drive means (4o, 88, 2o2, 222), wherein one of the drive means is in driving Connection with the output shaft (5 ^> 9 ^>.-12ο, 22o, 289) is located for their rotation, 309850/0476 -e. a variety of selectable and interchangeable Connectors (58, 84, 2oo, 218, 280), of each having identical connector means at one end to enable each connector can be optionally and independently connected to the rear end of the selected housing arrangement can, with the one end of the connecting piece that is connected to the rear end of the one selected Housing arrangement is connected to the rearward opening (35, 83, 214) thereof is operably assembled, around this opening in assembled Close position, f. a variety of in a selected manner and independently mounted in one of the selectable and interchangeable connectors (38, 84, 2oo, 218, 280), with one of the selectable and interchangeable housing arrangements (3I, 8l, I98, 2o6, 211, 236, 270) connected and for sealing the drive shaft (54, 94, 12o, '22o, 289) in the assembled position serving sealing means (62, 132) for the output shaft. 2. Centrifugal pump according to claim 1, characterized in that at least one of the connecting pieces (38, 84, 2oo, 218, 280) is suitable for each 309850/0476 of the pump housing (31, 8l, 198, 2o6, 211, 236, 27 ο J with the drive means (4o, 88, 2o2, 222) tightly coupled to provide a tightly coupled pump and at least one other of the connectors (38, 84, 2oo, 218, 280) is adapted to each the pump housing (31, 8l, I98, 2o6, 211, 236, 270) releasably coupling to the drive means (4o, 88, 2o2, 222) to provide a releasably coupled pump. 3. Centrifugal pump according to claim 1 or 2, characterized in that at least one of the Connectors (38, 84, 2oo, 218, 280) means for providing a mechanical seal (62) around the output shaft around and at least one other of the connectors (38, 84, 2oo, 218, 280) means for providing a bearing type seal (I32) around the drive shaft. 4. Centrifugal pump according to one of claims 1 to 3 * g e k e η η ζ e i without t through a multitude of various selectable and interchangeable bearing housings (86, 152, I82), each of which is operational between each of the connectors (38, 84, 20Ö, 218, 280) and each of the various selectable ones and replaceable drive means (4o, 88, 2o8, 222) can be attached. 50/0476 5 »Connector and sealing unit for one Fixed-coupled centrifugal pump with a pump end that has a housing with a rear opening and having an impeller, and a drive for driving a shaft on which the impeller in the housing is attached and thus rotatable, characterized in that the connecting piece and sealing unit at one end of this a flange for connecting the unit to the housing (31 # 81, 198, 2o6, 211, 256, 270) connected to the flange Means which form a rear closure of the housing and have a housing for the sealing unit, while on the pump housing (Jl, 8l, I98, 2o6, 211, 236, 270) facing away from the connecting piece Means are provided to connect the connector and seal unit to the drive means (4o, 88, 2o2, 222). 6. Connector and independent sealing unit for a tightly coupled centrifugal pump with one pump end that has a housing with a rear opening and having an impeller, “and a drive for driving a shaft on which the impeller is fastened in the housing and thus rotatable, characterized in that the connecting piece (58, 84, 2oo, 218, 280) and the independent sealing unit on one side thereof has a flange and an end cap for connecting the connecting piece and the sealing unit 309850 / 0.4-76- with the back of the housing (31, 8l, 198, 2o6, 211, 2j6, 270) on the rear opening (35, 83, 214) and for attaching the sealing unit around the shaft (- 54, 94, 12o, 22o, 289), means for forming a Has a seal between the flange, the end cap of the sealing unit and the rear end of the pump, the connector and sealing unit on the side opposite the means for connecting to the pump, Have connecting means that firmly couple the pump end to the drive means (4o, 88, 2o2, 222) allow. 7 · Two-piece connector related to a frame that has a bearing housing for an output shaft with a releasably coupled centrifugal pump comprising a pump housing with an impeller which is rotatably connected to the output shaft is characterized by i c h η e t that on Connector (84) a. an end cap (164, .164 ') and sealing means on the output shaft (12o), b. a spaced connecting bracket (I06) around the shaft, the connecting means on one End for connecting the connecting piece (84) at the rear end (83) of the housing (8l), is provided while c. the frame support means (98) for the connecting 309850/0476 having bracket (lo6) at the end facing away from the connecting means to one end of the bearing housing (154) in the assembled position wear, and d. Has means for sealing between the connecting means and the end cap and sealing device * 8. Two-piece connector according to claim J, ^/ characterized by a cooling jacket (181) around the bearing housing (154) and means for continuously supplying a coolant to the cooling jacket (I8I). 9 two-piece connecting piece according to claim 7 or 8, characterized in that the bearing housing (154) is arranged at a distance from one another ■ double ball bearings (185, 184) and middle (176, I78) for lubricating the bearings. Io. Two-piece connector according to one of the claims 7 to 9, characterized in that the end cap and sealing means (164, 172; 164 ', I72) means that have a mechanical Seal can be connected and converted into a selectable stuffing box. 309850/0476 11. Two-piece connector according to one of the Claims 7 to Iq, characterized net that the end cap and sealing device (164, 172; 164-, 172) has means around it form a stuffing box and are suitable, operable with a selectable and interchangeable, mechanical seal to be connected. 12. Two-piece connector according to one of claims 7 to 11, characterized e t that the support means for the connecting bracket (Io6) a. a part (98), the means for connecting the part (98) to the connecting bracket (I06) has, with b. Legs (99 d, 99 e) at the end opposite the connecting bracket and c. Means (99 a) to bring the part (98) into flush engagement with the connecting bracket (Io6) to bring and the part (98) at an angle?, Ur longitudinal axis of the connecting bracket to be attached in the assembled state. 13 Support means for a detachably coupled centrifugal pump, marked by a Part (98) with means for connecting the part (98) to a releasably coupled centrifugal pump in the middle of it, with this part (98) has a flat portion that has legs on 309850/0476 lower end, and by a splash (99 a) at the upper end, which is designed to meet the outer surface of the centrifugal pump in the assembled state includes flush with the splash arranged at an angle to the part (98) and the connecting means are connected to the saddle, the support means being at an angle be arranged to the longitudinal axis of the centrifugal pump. Centrifugal pump according to claim 1, characterized by an elongated guide channel (291) with connecting means at both ends, the drive means at one end with these Connecting means are connected and an output shaft (289) extends through the guide channel, and at least one permanently coupled connector (280) with fastening means for fastening to the housing (270), wherein the fastening means can be connected to the guide channel at the connecting pieces. 309.850 / 0476