DE2105121A1 - Vortex pump - Google Patents

Description

K 1 e 1 n _s S cha η ζ 1 in & Becker
Corporation

Wirb e 1pump

The invention concerns a device to compensate for the radial forces in side-channel pumps ₉ particular vertebral = pumpenο This type centrifugal pumps have the advantage over conventional pumps having impellers with the same diameter and the same wheel width (projected exit surface) has a much higher Radialkrafto This is on the one hand it due ₉ that the same diameter and the same rotational speed produced head accounts for a multiple of the delivery head of a conventional impeller and on the other hand it, ₉ that by the Druokattfbau along the TJmfanges a Druckverteilung- arises ₉ which in turn the formation of such high radial forces favored the mentioned high radial forces of the vortex pump in the flow point

3.
0 m / h can be a hundred times the radial forces of the conventional centrifugal pump Z ₀ B ₀ with a volute casing, require strong bearings and thick shafts and thus, in terms of diameter and length, very complex packing or mechanical mechanical seals and, in this context, large shaft overhangs as well as in general completely new bearing bracket sizes of all designs.

209833/0443

All these disadvantages are avoided or at least decisively reduced by the invention with a side channel pump, in particular a vortex pump, in which the part of the pump housing surrounding the hub or the like of the pump rotor forms two opposing pressure pockets ₉ which are separated from each other by throttle webs and are axially bounded by throttle gaps, where, from the pressure side of the pump housing a connecting line to the pressure pocket and from the inlet side of the housing a conduit to the other pressure pocket results in _o in conduits this connection, preferably in those which on the pressure side of the pump housing which leads a pressure chamber, regulating organs can be arranged "

As close as possible to the wheel, _e B "z at the hub has the pump according to the invention thus hydrostat a special type! = Shear compensation device in the form of two in their effect = ness of the radial force opposing pressure chambers of which one with the pump pressure zone and the other with the Pump inlet zone is connected _o Since the impeller radial force in its direction to the pump housing remains constant over the flow rate, the effectiveness of these two pressure chambers is set against the impeller radial force with the chamber differential pressure equal to the respective delivery head.

209833/0443

With the measure according to the invention, because the radial forces are now in the order of magnitude of those of conventional running wheels, the main advantage of using again correspondingly reduced bearing block or bearing bracket sizes. This causes a reduction in the radial force over the entire volume range of the vortex pump at any desired height, practically until it is completely balanced. If reinforced bearing supports are retained, however, the running behavior and the service life can be considerably improved for special cases. The pressure chambers form a sort of hydrostatic bearing, the projected bearing surface of the projected impeller surface must be at only about $ 60, a value so that it is easy to realize at the impeller hub for _e B _o.

Another advantage of the device according to the invention is that the axial displacement forces of the vortex pump impeller, which are present in the axial self-adjustment of the same, are reduced. From this you can the lateral restoring forces exerted by the housing on the impeller are also only small. All Improvements result in increased operational safety and service life for the impeller and the housing section from ο The particular advantage of this hydrostatic relief is that the effectiveness is not as with known hydrostatic bearings on a radial shaft deflection

209833/0443 - ^h ~

based, with the at the applied pressure height and at the same Surface formation could not achieve such high relieving forces, but on a location independent of the position dependent reaction, controlled solely by the delivery head = power development o

Figures "1 to 3 show embodiments of the device according to the invention ,, In Figure" Ί the Virbe is! Equipped pump rotor 1 having a hub 2 specific diameter and of specific length, which is surrounded, for example, _o from a housing-side neck 3 " in its inner bore, for example, two opposing against · = pressure pockets 4, 4 'are inserted which from one another by throttle webs 5''is separated and at the axial boundaries by throttle gaps 6, 6' 5 are limited »From the pressure side 7 of the pump housing 8, a a connecting line 11 connecting line led to a pressure pocket 4 and the Einlaufeeite 10 to the other pressure pocket 4 '(Figure 2 _e) <,

Figo3 shows an embodiment similar to FIG _o 1 with the difference that the pressure pockets 4 _f 4 ¹ are arranged closer to the rotor disc such that the axis-parallel-carrying throttle gap 6 is replaced by a normally to the axis through which throttling gap 6. ¹¹

209833 / CH43

Claims (1)

Patent claims ο) side channel pump j in particular vortex pump, characterized ρ that the part (3) of the pump housing surrounding the hub (2) or the like of the pump rotor (i) forms with it two opposing pressure pockets (49 4 ') 9 which are formed by throttle webs (5 »5 ') are separated from each other and ^{limited axially by throttle gaps (6, 6}} , 6 ^8> ), with a connecting line (9) from the pressure side (7) of the pump housing (8) to the one pressure pocket (4) and from the inlet side ( 1O) of the housing a line (11) is led to the other pressure pocket ^{(4 f)} 2 ", side channel pump according to claim 1, characterized in that in the connecting lines (9, 11)" preferably in the line (9) "a control element is arranged _{or the like} 209833/0443 Blank page