DE8102303U1 - CENTRIFUGAL PUMP FOR CONVEYING GAS-LIQUIDS - Google Patents

Description

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Änmeläefi ÖrUndfös A / a / Öestre Ringf Veä '7-11 / DK «885ö Btjeffingbrö, - KMÄSK

Centrifugal pump for pumping gas containing liquids

The innovation concerns a centrifugal pump for pumping gas-containing Liquids, in which the separation of the gas from the conveyed liquid with the help of a in the suction chamber built-in separator, whose exit opening for forwarding the degassed liquid is aligned on the suction mouth of the impeller, while the separated Gas from the separator via an air vent screwed into a threaded hole in the pump housing is derived into the environment.

In pump systems, the gas or air in the flow is the Cause of many malfunctions. As is well known, the Drosselktirve the pump with the gas part of the pumped liquid fall off-. In addition, the pump is ready for operation in the partial load range Difficulties because even small disturbances on the suction side lead to a break in the conveying flow can.

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If you see öägblägeii in it in Änlägfe 211 a larger one Unite volumes and this äääVölUmen / examplev / eioe düiföh Regelvoifgäfige conditional / with the Föifdeiistföm iii dä§ Pump impeller gets / is regular with failure to be expected of the pump. In the & entrifugälfeld des Lauf " rades the gas völümen is displaced towards the axis of rotation / where it blocks the Säügseite / so that the promotion Is prevented *

To solve this problem, various gas separators / based on the gravitational or centrifugal principle have already been developed as independent devices 583 and 3,622,423 are shown and described. The separators built into the suction chamber of the pump as separate components have the main disadvantage that they lead to a large-volume construction of the pump housing. In addition, the pump housing usually has to be constructed in several parts in order to be able to mount the gas separator at all. As a result, the overall installation effort is relatively high, with the additional fact that complex machining of the pump housing and further special fastening means are required for fastening the separator _;

To eliminate dxeSeif disadvantages, the one mentioned at the beginning

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Ki'eiselpürrtpe according to the innovation so designed that you Äbsöheidei? From BirUdfcräüm deif P "Umpe aus dür§h one in det" Partition between Öäug ^ Urid JÖrudkiräUin is located in the opening is eifisefezbar in the SäUgräUm and that the envelopes of the Separator by fastenings in the areas of his Wasser- und Gasaüstfittsoffnüng is fixed *

fcer The main advantage of this solution is above all in it do see that the pump housing is still as simple, fine-piece and small-scale casting can be produced * Otherwise, the installation of the separator is carried out by fiie opening in the aforementioned partition wall, which is required anyway, so that in this respect no structural changes are required.

Some pump types are located in the opening in the partition a circular ring disc, while on the side opposite the partition wall opening towards the engine flange is provided for connecting the motor housing. t in this case need the partition opening and the flange opening only to be matched to the dimensions of the separator that the separator prior to assembly of the Circular ring disc through the two openings mentioned in the Saügräüm can be used.

In addition, the separator can be both radial and axial

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Wife help this ^ ifeiäifingscheibe einöjpänn-b and fiJii Weifderii Furthermore wiifd purposefully a Vef · " difehsieheifüftg des Absöheiderä supported by defi ÖeV / ind tiiieö en-iii ventilator created / by the thread support running essentially radially into the gas outlet opening the separator protrudes *

The attached drawing is an example of an execution 6th innovation shown. Show it:

Figure 1 shows a longitudinal section through a centrifugal pump according to the section line B-B in Figure 2 and

FIG. 2 shows a section corresponding to the section line A-A in FIG. 1.

the pump shown is a circulating pump, as can be used in heating ^ and domestic water systems. The gas-containing water enters the suction chamber 2 of the pump housing through the suction nozzle 1. The centrifugal separator 3, the water outlet opening 4 of which is aligned with the suction mouth 5 of the centrifugal wheel 6, is inserted into the suction chamber. The water inlet opening 7 of the separator is located in the upper area of the suction chamber 2,

_t , 'The essentially cylindrical separator 3 has at the top

At the end of an exit opening 8 for the separated gas. The-

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This opening is aligned with a threaded hole 9 in the pump housing, in which the threaded connector of a not further shown and the well-known breather is screwed so far that the threaded connector protrudes into the opening 8, so that the separator 3 is thereby secured against rotation about the longitudinal axis 1o. In the partition between the Suction chamber 2 and the pressure chamber 11 receiving the impeller 6 there is a circular opening 12 into which the Circumference of an annular disk 3 3 is pressed in. A short pipe socket 14 forms the water outlet opening of the separator 3 and is encompassed by the central hole of the disc 13 at the free end. As a result, the separator is on the according to Fig. 1 secured on the right side radially to the longitudinal axis 1o. A further radial definition of the separator results from one located on the other side of the separator Approach 15, which is in accordance with the illustration in one of the partition opening 12 or the circular ring disk 13 opposite Recess of the pump housing is. In addition, the separator 3 is also clamped axially with the disk 13 and fixed.

The pump housing has a flange 16 with an opening 17 directed towards the motor, not shown, on this flange the head of the drive motor for the pump is connected in the usual way.

The two openings 12 and 17 are dimensioned so that the VÖK

Assembly of the disc 13 and the impeller 6 of the separator * 3 can be inserted from the outside through the opening 17, the adjoining pressure chamber 11 and the opening 12 into the suction chamber 2. The separator 3, which is then to be aligned with its installation position, is clamped in by subsequently pressing in the annular disk 13 as shown. The threaded connector of the ventilator is then screwed into the bore 9 until the threaded connector engages in the opening 8 of the separator 3. Finally, the impeller 6 can then be mounted.

The separator can be a one-part or multi-part injection-molded plastic component. With a multi-part training The separator parts are held together by the circular ring disk 13 and the other fastening means mentioned. The walls of the separator, which is geometrically quite complicated, are not otherwise through the System pressure of the system, but only due to its own low pressure loss generated in the separator itself. The resulting external pressure is sufficient, however, to remove the parts of the, possibly multi-part Separator without screw connections or other fasteners to stick together.

Claims (5)

■ t It I I '«r * *, ilS! Applicant: Grundfos A / S, Oestre Ring Vej 7-31, DK-885O Bjerringbro 'DENMARK Protection claims 1. Centrifugal pump for pumping gaseous liquids t ** the separation of the gas from the delivery liquid ί using a built-into the suction chamber (2) deposition DERS (3) takes place, the outlet opening (4) for further line of the degassed liquid is aligned with the suction mouth (5) of the impeller (6), while the separated gas is discharged from the separator via a ventilator screwed into a threaded hole (9) in the pump housing, characterized in that the separator ( 3) can be inserted from the pressure chamber (11) of the pump through an opening (12) located in the partition between the suction and pressure chamber into the suction chamber (2) _r 8) is fixed. 2. Centrifugal pump according to claim 1, in which a Kreieringseheibe (13) sits in the Trennwöndöffiling (12) and the pumps ¹ housing on; left to his owner the Trännwandörfnung l> Uli II I 1 · · ■ # M «« · Il lowing side a flange (16) for the connection of the Motor housing, characterized in that the separator (3) before assembly, the circular ring disc (13) through the flange opening (17) and the partition opening (12) can be inserted into the suction chamber (2). 3. Centrifugal pump according to claim 2, characterized in that the separator (3) with respect to the pump longitudinal axis (1o) is clamped and fixed both radially and axially with the aid of the circular ring disk (13) and that a rotation lock of the separator is created by the threaded connector of the breather by inserting the threaded connector into the The gas outlet opening (9) of the separator protrudes. 4. Centrifugal pump according to one of claims 1 to 3, characterized in that that the separator (3) has a substantially axially extending extension (15) which is in one of the partition opening (12) the opposite recess in the pump housing plugged. 5. Centrifugal pump according to one of claims 1 to 4, characterized by, that the separator (3) is a one-part or multi-part injection-molded plastic component.