Rotary kinetic fluid motors or pumps – With means for re-entry of working fluid to blade set – Turbine regenerative pump
Patent
1998-03-09
2000-02-01
Look, Edward K.
Rotary kinetic fluid motors or pumps
With means for re-entry of working fluid to blade set
Turbine regenerative pump
415 552, 415 553, 415 554, 4151701, 4151731, 4151733, 4151734, 4151742, 4151743, 4151744, 277402, 277407, 277946, F01D 112
Patent
active
060195711
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a side channel compressor in which a gap existing between a rotor and housing parts surrounding the rotor is sealed off using a sealing tape introduced into a peripheral groove provided in corresponding wall regions of the housing parts.
RELATED TECHNOLOGY
Such a side channel compressor is known from DE-A-22 44 933. In this known side channel compressor, a sealing tape is inserted into a groove of the housing cover, the said groove extending in each case transversely relative to the plane of the gap existing between the rotor and the housing. During the assembly of the side channel compressor, this sealing tape can be brought into its position by means of the rotor itself. The sealing tape is then fixed in this position in various ways, inter alia also by means of an adhesive or sealing compound. After the alignment of the sealing tape, the adhesive or sealing compound is introduced into the groove via corresponding perforations accessible from the outside. In this case, some of the compound may escape from the groove and bond with the rotor, with the result that the latter may jam and the compressor may not start up. Moreover, in the course of the operating time of the side channel compressor, the bond of the adhesive or sealing compound may come loose from the smooth wall face of the sealing tape.
SUMMARY OF THE INVENTION
The object on which the present invention is based is to develop a side channel compressor of the relevant generic type, in such a way that an impairment of the operability of the side channel compressor by a sealing tape attached to the housing is largely ruled out.
The present invention therefore provides a side channel compressor in which the sealing tape is held by a solidifying compound which is introduced into groove widenings provided at a plurality of points located in a distributed manner over the circumference of the peripheral groove and which makes a positive connection with the sealing tape. Since a solidifying compound is introduced only at a few points of the peripheral groove, the risk that the rotor will jam because too much compound has been introduced is virtually ruled out. A permanent retention of the sealing tape is afforded by the positive connection between the compound and the sealing tape.
If the groove widenings are designed as pocketlike widenings accessible from the inside of the housing parts, then the compound can be introduced only from inside the housing into this widening and consequently the escape of the compound out of these widenings can be observed and appropriately prevented.
The positive connection between the compound and the sealing tape is achieved in the simplest way using depressions which are provided on the sealing tape and into which the compound penetrates, or using elevations on the sealing tape which are embedded by the compound.
It is also advantageous to provide on the sealing tape bores or perforations which are at least partially filled with the compound and which thus ensure a satisfactory positive connection of the compound to the sealing tape. A material strip consisting of Teflon can be provided especially advantageously as sealing tape.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention is described in more detail below by depicting a plurality of portions of a side channel compressor which are represented in part cross-section. In the drawing:
FIG. 1 shows a sealing arrangement in a side channel compressor with a non-fastened portion of the sealing tape,
FIG. 2 shows a portion designed for fastening the sealing tape, and
FIG. 3 shows the portion shown in FIG. 2, after the introduction of a solidifying compound.
DETAILED DESCRIPTION
With reference to FIGS. 1, 2 and 3, the number 1 denotes a housing half and number 2 the rotor of a side channel compressor. The rotor 2 has, in a known way, a base ring 5 fitted with feed vanes 3 and carried by the hub 4 of the rotor 2. A side channel 6 is formed on the housing half 1. The housing of the side channel compressor is c
REFERENCES:
patent: 4221390 (1980-09-01), Bainbridge
patent: 4806073 (1989-02-01), Schonwald
patent: 5143511 (1992-09-01), Verneau et al.
patent: 5879789 (1999-03-01), Dolan et al.
Look Edward K.
Shanley Matthew T.
Siemens Aktiengesellschaft
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