Pumps – One fluid pumped by contact or entrainment with another – Contact or entrainment within rotary impeller
Patent
1993-11-15
1995-03-28
Bertsch, Richard A.
Pumps
One fluid pumped by contact or entrainment with another
Contact or entrainment within rotary impeller
417521, F04C 1900
Patent
active
054011418
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a multiple-flow liquid ring pump.
In a liquid ring pump known from DE-B-10 57 284, sockets protrude radially with respect to a rotor housing and form inlet and outlet openings. These sockets are provided on side shields which are arranged on the ends of the rotor housing. Connecting pieces are connected to each other by corresponding connecting tubes. A suction socket and a delivery socket are present on each of these connecting tubes. These sockets are for the feeding and discharge lines. Due to this arrangement and development of the connecting tubes a large amount of space is required for the liquid ring pump. Furthermore, the connecting tubes can be mounted only at the site of installation of the liquid ring pump.
In another embodiment described in DE-B-10 57 284, connecting channels are developed within the rotor housing, extending between the two ends of the housing. In this way the space required for such a liquid ring pump is, to be sure, reduced. However, the resultant shape of the housing is still difficult to produce and machine.
SUMMARY OF THE INVENTION
The present invention provides a multiple-flow liquid ring pump that, while retaining a shape of housing which is favorable for manufacture, provides that the space required for the liquid ring pump is as small as possible.
According to an embodiment of the present invention, the liquid ring pump has a rotor, a rotor housing which surrounds the rotor, and two side shields, one arranged at each end side of the rotor housing. The side shields each have a projecting region that extends at least partially beyond the rotor housing at the same point with respect to each other's circumference. Each side shield has an inlet opening and an outlet opening on the side facing the corresponding other side shield in its projecting region. Connecting tubes connect opposite lying inlet and outlet openings and extend parallel to the rotor housing. The inlet and outlet openings provide a suction opening for a feed line and a delivery opening for a discharge line. In a liquid ring pump of this development, the connecting tubes are applied already at the time of manufacture of the pump and lie within the contour of the pump. In this way, the mounting of the pump at its place of use is substantially simplified.
By an angular development of the side shields as compared with a round rotor housing, there necessarily result protruding corners of the side shields in which the connection openings necessary for the connecting tubes can be arranged.
A purely insertion attachment of the connecting tubes is obtained in the manner that the inlet and outlet openings of the side shield are surrounded by a receiving rim and both ends of the connecting tubes rest sealed against the receiving rim of the opposite opening. The sealing is advisedly effected by means of an elastically hardening liquid sealing composition.
For the manufacture of the liquid ring pump it is favorable for the suction and delivery openings to be provided on one of the side shields. In this connection, it is, in turn, advantageous for the suction and the delivery openings to be provided on the end side of the side shield which lies on the side remote from the drive motor of the liquid ring pump.
Aside from the connecting tubes, tubes which serve for the feeding of operating liquid or for pressure equalization between the two pump halves of the liquid ring pump can also be connected in the same way as the connecting tubes to corresponding connection openings of the side shields. In this case, the connection openings are developed on the sides of the side shields facing each other so that the tubes to the rotor housing can be inserted extending parallel to each other between the side shields.
The invention will be described in further detail below with reference to an embodiment shown in the drawing.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 illustrates a side view of a liquid ring pump according to an embodiment of the present invention.
FIG.
REFERENCES:
patent: 3228587 (1966-01-01), Segebrecht
patent: 3275222 (1966-09-01), Meyer
patent: 4132504 (1979-01-01), Fitch
Bertsch Richard A.
McAndrews, Jr. Roland G.
Siemens Aktiengesellschaft
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