Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Casing having multiple parts releasably clamped
Patent
1995-05-04
1997-02-25
Kwon, John T.
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Casing having multiple parts releasably clamped
4151821, 415 555, F01D 2524
Patent
active
056054432
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a compressor set having at least two side-channel compressors which are in an axially adjacent arrangement and have in each case a casing comprising at least two casing halves provided on their outer circumference with radially outwardly projecting connecting plates and which are joined together by connecting elements which can be introduced into corresponding openings in the connecting plates.
A compressor set of this type is shown in German Patent No. DE-U-7,715,000. In this compressor set, the four casing halves required for the two side-channel compressors are all of different designs. This leads to high production expenditure. The connection of the individual casing parts is effected by inserting the middle casing parts between the outer casing parts which are joined together by tie rods which engage on connecting plates provided on the outer casing parts. The total force must therefore be absorbed by the connecting plates of the outer casing parts.
It is an object of the present invention to provide a compressor set which is simpler to produce and in which the forces necessary for connecting the casing halves are distributed in an improved manner.
SUMMARY OF THE INVENTION
The object is achieved by the compressor set of the present invention which includes at least the two casing halves located in the middle of the compressor set which are cast in the same manner and the connecting plates provided on the casing halves are designed, at least on one end face of the casing halves, in such a way that there is still space on both sides of a connecting element (which can be mounted in the middle of the circumference of the connecting plates) in each case for a further connecting element to be mounted. Because of at least the inner casing halves being cast in the same manner, the expenditure for the diecasting tools necessary to produce the casing halves is reduced. In this case, a good transmission of the forces in the axial direction is achieved by the special design of the connecting plates without the need to include harmful bending moments in design tolerations. Additionally, the two inner casing halves can be joined together in advance to form a module.
A connection of the casing halves which is completely free from bending moments can be achieved in that in each case two connecting plates located on the one end face of the respective casing half are assigned one connecting plate which is located on the other end face of the casing half and is aligned symmetrically to the connecting plates.
The transmission of the forces over the full axial length of the compressor set without harmful bending moments is achieved according to a design of the invention in that connecting plates corresponding to the connecting plates of the casing halves located in the middle are also provided on the outer casing halves.
It is particularly expedient for the two connecting plates to be aligned with their mutually facing sides and approximately flush with the outer sides of the one connecting plate. In a compressor set of this type, a relief of the connecting forces on the actual casing can be achieved in that the connecting plates arranged on both end faces of the casing halves are joined together by axially extending webs. The webs engage on the two connecting plates in the region of their mutually facing sides and on the one connecting plate in the region of its outer sides.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a cross-section through a compressor set of the present invention comprising two side-channel compressors.
FIGS. 2-4 are plan views of various connections of the individual casing halves.
DETAILED DESCRIPTION
In FIG. 1, the first outer casing half 1 of the one side-channel compressor 2 of the compressor set is located on the side facing away from the drive side of the compressor set and is provided with a bearing bore 3 for an end-side bearing 4 of the drive shaft 5 of the set. Arranged between the second outer casing half 6 of the other
REFERENCES:
patent: 4204802 (1980-05-01), Schonwald et al.
patent: 4943208 (1990-07-01), Schoenwald
patent: 4992022 (1991-02-01), Aust et al.
patent: 4997342 (1991-03-01), Conger, IV
Balling Manfred
Schoning Rudolf
Kwon John T.
Siemens Aktiengesellschaft
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