Rotary kinetic fluid motors or pumps – With means for re-entry of working fluid to blade set – Turbine regenerative pump
Patent
1999-12-29
2000-10-10
Look, Edward K.
Rotary kinetic fluid motors or pumps
With means for re-entry of working fluid to blade set
Turbine regenerative pump
415 554, 4151701, 4151731, 4151733, F04D 0500
Patent
active
061295086
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a side channel compressor, in which an impeller is arranged rotatably in the housing of the compressor and has a support ring which is provided with transport blades and, at least on one side, projects axially beyond a hub part which bears the support ring and connects it to a drive shaft. In the region of the support ring, a radially extending sealing ring butts against an inner circumference of an axially projecting part of the support ring and seals the gap present between the impeller and the housing. The sealing ring is retained by means of a retaining ring, in a state clamped against an abutment surface provided on the housing.
Such a side channel compressor is known from EP-A-0 708 248. In the case of this known compressor, a sealing ring is retained, by means of a retaining ring, in a state clamped against an abutment surface provided on the housing of the side channel compressor. The sealing ring extends radially as far as the support ring, which carries the vanes of the side channel compressor, and butts against the inner circumference of said support ring. In order to achieve good sealing, the sealing ring has to butt satisfactorily against each point of the inner circumference. This presupposes very precise central alignment of the sealing ring, which can only be achieved by way of correspondingly high installation outlay.
SUMMARY OF THE INVENTION
The object of the invention is to develop a side channel compressor of the general type noted above such that the sealing ring can be installed in a straightforward manner with a high degree of alignment accuracy.
The object is achieved by means of a centering border which aligns the sealing ring, and which is provided on the abutment surface. For accurate alignment, all that is needed is for the sealing ring to be pushed into the centering border. The centering border itself can be produced in a straightforward manner, as by a turning operation.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is described in more detail hereinbelow with reference to an exemplary embodiment illustrated in the drawing, in which:
FIG. 1 shows a partial longitudinal section of a side channel compressor with a first embodiment of a centering border, and
FIG. 2 shows a partial longitudinal section of a side channel compressor with a second embodiment of a centering border.
DETAILED DESCRIPTION
In the figures, one half of a housing of a side channel compressor is designated by numeral 1. Two housing halves 1 joined together provide a complete housing that encloses an impeller 2 that is arranged on a drive shaft (not illustrated in the figures). On its outer circumference, the impeller 2 has a support ring 3 on which the transport blades 4 of the impeller 2 are arranged. The support ring 3 is arranged on a hub part 5 which is fitted on the drive shaft and which is connected to the latter in a rotationally fixed manner.
A sealing arrangement is provided on each housing half 1, in the region which borders the support ring 3 radially inside the latter. This sealing arrangement comprises a plastic sealing ring 6 which is retained, by means of a retaining ring 8 which is fastened by means of screws 7, against a corresponding abutment surface provided on the housing wall of the respective housing half 1.
A corner recess 9 is produced on each end side of the support ring 3 by turning, and the sealing ring 6 engages in said corner recess. The sealing ring 6 butts, by way of its outer circumference, against the inner circumference of the axially extending wall part of the corner recess 9. Production of the corner recess 9 by turning results in a high degree of dimensional accuracy as regards the diameter of the corner recess 9. Since the sealing ring 6 can also be produced with a high degree of accuracy as regards its external diameter, a good sealing action can be achieved by precise central alignment of the sealing ring.
The sealing ring 6 is aligned centrally by means of a centering border 10 provided on the re
REFERENCES:
patent: 4279570 (1981-07-01), Egli et al.
patent: 5658126 (1997-08-01), Werner et al.
Bahr Hubertus
Krummen Peter
Look Edward K.
McDowell Liam
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