Injection device for the ON-LINE wet cleaning of compressors

Details Injection device for the ON-LINE wet cleaning of compressors Injection device for the ON-LINE wet cleaning of compressors

1991-10-15

1993-03-16

Look, Edward K.

Rotary kinetic fluid motors or pumps

With diversely oriented inlet or additional inlet for...

4151213, 2395874, 134 23, 60 3933, F04D 2970

Patent

active

051939762

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

1. Field of the Invention
The invention relates to an injection device for the ON-LINE wet cleaning of compressors, by means of which injection device the liquid cleaning agent can be directed via a nozzle into the flow passage upstream of the compressor.
2. Discussion of Background
Conventional injection devices offer little protection against possible consequential damage to the blades. As a rule these injection devices are rebound nozzles whose connecting pieces necessarily project relatively deep into the flow passage. In particular in transonic compressors, such disturbing elements in the compressor inlet are inadmissible for technical reasons related to flow. Potential risks with regard to blade damage are of a two-fold nature: on the one hand, the connecting pieces can be shaken off in the event of resonance and be flung against the blading; on the other hand, the connecting pieces can fly out of their anchorage as a result of corrosion damage, for example pitting. The operating mode of rebound nozzles of this type is also not quite satisfactory. The atomizing of the cleaning liquid is not uniform at different drop sizes. This can lead to the partial inducement of vibrations at the blading. Furthermore, there is the possibility of erosion of the blade coating. In addition, the nozzle output can be set only by pressure change, in the course of which, however, the drop size is directly affected. Finally, the direction of the nozzle jet can also only be varied around the connecting-piece axis itself, which makes it impossible to individually adapt the nozzle jet to the prevailing flow conditions.


SUMMARY OF THE INVENTION

Accordingly, one object of the invention is to provide a novel device of the type mentioned at the beginning which on the one hand is adjustable in spray output and spray direction and on the other hand provides maximum protection for the compressor blading against parts of the device detached by force.
According to the invention, this is achieved in that the nozzle is a molecular atomizer which is mounted in the casing wall of the compressor in such a way that it can be adjusted in a three-dimensional manner in a ball-and-socket joint.
The advantage of the invention can be seen in particular from the fact that, on account of the commercially available nozzle used in a universal insert, output corrections as well as adjustments to the direction of the nozzle jet and the type of nozzle jet can be carried out when the compressor is running without impairing the operation of the machine.


BRIEF DESCRIPTION OF THE DRAWINGS

A more complete appreciation of the invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings, wherein: FIG. 1 shows a schematic longitudinal section through
the inlet portion of an axial compressor; FIG. 2 shows a sectional representation of the mounted
adjustable injection device.
Parts of the compressor which are not essential to the invention have been omitted. The flow directions of the operating media are designated by arrows.


DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring now to the drawings, wherein like reference numerals designate identical or corresponding parts throughout the several views, in FIG. 1, four installation examples for the injection nozzles are shown. It goes without saying that, irrespective of the configuration of the compressor inlet selected, the positions and number of nozzles are to be selected in such a way that on the one hand they act on the entire through-flow cross-section and on the other hand they are accessible from outside. The medium to be injected is as a rule a mixture of a commercially available concentrate and prepared water.
According to FIG. 2, this mixture is injected into the through-flow passage 1 via a molecular atomizer 2. This atomizer 2 is fastened in the interior of a ball-and-socket joint 3 by means of a sc

REFERENCES:
patent: 2689456 (1954-09-01), White
patent: 3377026 (1968-04-01), DeMart et al.
patent: 3421702 (1969-01-01), O'Brien
patent: 3623668 (1970-11-01), Freid
patent: 4196020 (1980-04-01), Hornak et al.
patent: 5011540 (1991-04-01), McDermott
Patent Abstracts of Japan, vol. 6, No. 50 (M-120)(928) 3 Apr. 1982, & JP-A-56 165800 (Hitachi) 19 Dec. 1981.

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