EP1519049A2 - Side channel compressor with annular casing - Google Patents

Abstract

The side channel compressor has an annular impeller casing (1) provided with an air suction and air outlet connector. The impeller casing has a through-channel (12) which extends in an axial direction from one side of the casing to the opposite side and located in the region between the air suction connector and air outlet connector. The impeller casing is constructed in double shell form, with the shells (2) the same in design and abutting and sealed along a parting plane extending at right angles to the axis of the impeller.

Description

The invention relates to a side channel compressor with an annular impeller housing having a rotatable in it stored impeller encloses and with a Luftansaug- and an air outlet is provided.

An example of such a side channel compressor is described in DE A1 2 223 762. The impeller housing This single-stage side channel blower is double-shelled formed, wherein the two housing shells different are designed. A the actual "housing" forming Housing shell is with the respective molded Air intake and air outlet and with a bearing support provided for a rolling bearing, in which one the impeller bearing shaft is mounted. The other housing shell is formed in the manner of a "lid" along a perpendicular to the impeller shaft axis extending parting plane sealed is placed. Both housing shells are by axially arranged around distributed bolts braced together. With the air intake and the air outlet are connecting elements in the form of silencers and the like, while connected to the Air intake and the air outlet nozzle supporting housing shell a flanged the impeller shaft driving electric motor is.

In addition, in DE U 74 41 311 a compressor assembly described for generating a variety independent Gasüber- or gas vacancies, in particular for data processing systems. At this Compressor arrangement are several so-called ring compressor, their housing form-fitting with a centering edge to each other limits in the axial direction held together by threaded bolts. The wheels of the individual compressor stages forming ring compactors are on a common Arranged in two housing shells made of the shaft existing double-shell ring compactors existing Compressor assembly is rotatably mounted and a patch V-belt pulley can be driven. The Air outlet sockets may be either individually, i. everyone to direct an air flow to a point to be cooled or the air outlet of each ring compressor can also be used to generate desired air volumes be switched in parallel or in series. Such Parallel or series connection requires but own suitably designed collection and / or branch lines, laid outside the compressor assembly and with the air outlet of each ring compressor need to be connected.

Based on this prior art, the invention the task is based on a side channel compressor to create that compared to the state of the art without large additional operational effort more versatile is.

To solve this problem, the inventive Side channel compressor, the features of claim 1 on.

The new side channel blower is the impeller housing provided with a continuous channel, which is in Axial direction from one side of the housing to the opposite Housing side extends. Because the channel is inside the Impeller housing is arranged, it requires no magnification the housing dimensions. He can for a variety of purposes may be used, in which e.g. it depends on one Fluid flow independent of that of the side channel compressor funded gas or air flow through the housing axially by pass. For example, it is possible to use the channel for Passing a cooling medium through the impeller housing to use to dissipate the resulting heat of compression. For this it is expedient that the channel in the area between the air supply and the air outlet, i.e. in the area of the so-called breaker between them two connecting pieces is arranged.

In the multi-stage design of a side channel blower with at least two axially interconnected Impeller housings, each containing its own impeller, are the channels of the axially adjacent one another Impeller housing to a common, through the impeller housing continuous axial channel connected together. This channel allows a return of the compressed gas or the compressed air through the housing. The necessary Gas or air deflection can easily be done by deflecting on an impeller housing are attached, with the air outlet of this Impeller housing in gas or air connection or in general in fluid communication. By appropriate design the deflection can also several compressor stages eg. be switched one behind the other. The channel can also be through Partitions in longitudinally parallel to each other Split sub-channels, if this is the respective Purpose appears necessary.

Particularly simple, constructive conditions result when the impeller shell is double-shelled, wherein the two housing shells are designed the same and one molded air intake and one molded Have air outlet. In this case is in everyone the two housing shells formed an axial channel part, such that when assembled to the impeller shell Housing shells of the axially continuous channel from the two sealed together channel parts consists. Since the housing shells even with multi-level training all are the same, arise on both Sides of the impeller housing same connection possibilities for the gas or air supply and for the compressed gas or the compressed air. The one not used Air inlet and / or air outlet of a housing shell is closed by shut-off.

Further advantageous embodiments of the new side channel compressor are the subject of dependent claims.

Fig. 1

einen Seitenkanalverdichter, gemäß der Erfindung, in perspektivischer Darstellung,

Fig. 2

den Seitenkanalverdichter nach Fig. 1 in einer Seitenansicht,

Fig. 3

den Seitenkanalverdichter nach Fig. 1 in einer Seitenansicht auf die Motorseite und

Fig. 4

den Seitenkanalverdichter nach Fig. 1 in zweistufiger Ausführung, in einer Schnittdarstellung entsprechend der Linie IV-IV der Fig. 3 und

Fig. 5

den Seitenkanalverdichter nach Fig. 4 in einer perspektivischen Explosionsdarstellung.

In the drawing, an embodiment of the object of the invention is shown. Show it:

Fig. 1

a side channel compressor, according to the invention, in perspective view,

Fig. 2

the side channel compressor of FIG. 1 in a side view,

Fig. 3

the side channel compressor of FIG. 1 in a side view of the engine side and

Fig. 4

1 in two-stage design, in a sectional view corresponding to the line IV-IV of Fig. 3 and the side channel compressor of FIG

Fig. 5

the side channel compressor of Fig. 4 in a perspective exploded view.

The side channel compressor shown in Figs. 1 and 2 has a substantially annular impeller housing 1, which consists of two identical housing shells 2 and encloses a shown in Fig. 4 at 3 impeller. The impeller 3 is driven by an electric motor 4, the side and coaxial with the impeller housing. 1 is flanged. The two impeller housing 1 forming Housing shells 2 are identical. Each of the housing shells 2 has a side channel receiving the impeller 3 5 on, covering most of the circumference extends and a molded air inlet 6 with a molded air outlet 7 connects. Between the air inlet nozzle 6 and the air outlet 7 is a locking piece 8 is arranged, as in side channel compressors known per se. The air intake 6 and the air outlet 7 are in a common housing part 9 formed integrally on the housing shell. 2 is formed on both sides and a flat, perpendicular to the impeller axis 10 extending fitting surface 11, and 11a wearing. In the housing part 9 is between the air intake 6 and the air outlet 7 a through-channel 12 formed over the entire axial length of the Housing shell 2 extends and in the two opposite and mutually parallel mating surfaces 11, 11a empties. The passageway 12 is in the region of the locking piece 8 arranged and is not with the side channel 5 in Connection.

The part-annular side channel 5 extends around a disc-shaped hub part 13 of the housing shell 2, on which a centric bearing housing 14 is formed, the for receiving a rolling bearing 16 for the impeller 3 bearing Shaft 10 is determined (see Fig. 4). The rolling bearing 16 is by a screwed bearing cap 17 to the outside too closed. At a radial distance is the bearing housing 14 of a tubular, substantially cylindrical Ring flange 19 surrounded, on its outer end face a flat mating surface 20 carries, parallel to the Matching surface 11 is aligned with the housing part 9 and with this lies in a common plane. At that to the Impeller shaft 100 coaxial annular flange 19 a housing shell 2 of the impeller housing 1, as can be seen from Fig. 4, the electric motor 4 flanged while on the Electric motor 4 opposite impeller housing outside on the annular flange 19 of the corresponding housing shell. 2 a lid 21, screwed sealed against the mating surface 20 is.

On the housing part 9 diametrically opposite Side is formed on the housing shell 2 a support block 22, which is located between two cooling fins 23, the the Side channel 5 containing housing shell part outside in the For example, surrounded from Fig. 1 apparent manner. The support block 22 protrudes axially slightly above the cooling fins 23 and carries on its outside a flat mating surface 24, the with the mating surface 11 of the housing part 9 and the mating surface 20 of the annular flange 19 lies in a common plane.

A arranged on the outer edge of the housing shell 2 Flange 18 carries on its side facing away from the annular flange 19 Side a flat plane 25, which is perpendicular to the Impeller axis 100 runs and in a plane with the associated Mating surface 11 of the housing part 9 is located. In the areas the mating surface 25 is in the flange 18 an open-edge Ring groove 26 is formed, which has an L-shaped cross section and is bounded by two surfaces, from one at right angles and the other parallel to the Impeller axis 100 runs. In the assembled state lie the two housing shells 2 of an impeller housing 1 with their mating surfaces 25 to each other, so that the two Ring grooves 26 extending to a circumferentially Add channel 27, which has a rectangular cross-sectional shape having. In the channel 27 is a closed dimensionally stable Ring 28 fitted tight tolerances, the two housing shells 2 centered against each other.

The ring 28 is made of aluminum or, for example, from Steel, brass or even plastic and is with a Sealing material, in particular of polytetrafluoroethylene coated, so that it acts as a sealing ring. In the area of Air intake 6 and the air outlet 7 is the Ring 28, as at 29 in Fig. 5 for the air intake 6th represented, with a respective nozzle bore enclosing formed eye-like part.

The two housing shells 2 are by rings around the Perimeter evenly distributed bolts axially braced together, not shown in detail are and pass through associated axial bores 30, which penetrate the flange 18 and the housing part 9. In the illustrated embodiment, the Arrangement made such that the ring 28 with holes 30 is provided. For axially clamped housing shells 2 of the impeller shell 1 are, as already mentioned, the housing shells with their mating surfaces 25 against each other pressed and radially centered over the ring 28, wherein the ring 28 at the same time sealing the Impeller housing 1 in the areas perpendicular to the wheel axis 10 extending separating surface between the causes two housing shells. This seal is very effective because of the axially inserted into the holes 30 Screw bolt generated contact force immediately is transmitted to the ring 28.

While in Figures 1 and 2, a single-stage side channel compressor is shown, the only one of two identical housing shells 2 composite impeller housing 1, Figures 4, 5 show a two-stage Embodiment in which two identical impeller housings 1, 1a, each of which encloses its own impeller 3, axially connected to each other. As in particular from Fig. 4 to refer, the adjacent housing shells are the second the impeller housing 1, 1a with their in a common Level lying mating surfaces 11, 20 and 24 to each other adjacent tensioned by tie rods 31 axially against each other. In addition, these two housing shells 2 by one to the impeller axis 10 coaxial inner steel existing centering ring 32 radially centered. The centering ring 32 engages positively in cross-section L-shaped, open-edged turns on the inside of the ring flange 19 one. It is inserted under preload clearance and, together with the mating surfaces 11, 20, 24 a exactly centered and with respect to the impeller shaft 10 exactly oriented at right angles to the two impeller housings 1, 1a. The impeller shaft 10 is through the two adjacent impeller housing 1, 1a continuously formed and carries both wheels 3, while the electric motor 4 to the outer housing shell 2 of the impeller housing 1a is flanged and the outer ring flange 19 of the other drive housing 1 through the lid 21 is closed.

Fig. 4 also shows that the impeller shaft 10 on the impeller side only in a single roller bearing 16th is mounted, which on the electric motor 4 facing Side in the corresponding housing shell 2 of the impeller housing 1 is arranged. A second depository of the Impeller shaft 10 is in the bearing plate 34 of the electric motor 4 present and formed by a rolling bearing 35.

Similar to the described with reference to FIGS. 4, 5 two-stage Training the side channel blower are also Embodiments possible in which, in a corresponding manner a plurality of impeller housing 1, 1 a axially flanged together are to side channel blower with more than two To create compressor stages. For all these multi-level Side channel compressors are the through channels 12 of the individual housing shells 2 sealed flush with each other, butt joined to each other, so that extends over the entire axial length of the compressor continuous axial channel results (see Fig. 4). ends attached deflectors 36 allow the air outlet 7 a compressor stage with the air inlet nozzle 6 a subsequent compressor stage to connect to a Possible use of the continuous axial channel too mention. Another use is to Pass coolant through the channel to accumulate Dissipate heat of compression. That being said, the in this case unused passage 12 through a on the outer housing shell 2 of the impeller housing. 1 attached lid 37 (Fig. 1.5) are closed.

The cover 37 is formed with two cover parts 38, the unused air intake 6 and the also not used air outlet 7 at this Close housing shell 2 sealed. At the same time on the lid part 37 two feet 39 for the side channel compressor molded, the a flat base 40 and Have holes 41 for anchoring screws.

To the air intake 6 and the air outlet 7 of the opposite, bolted to the electric motor 4 Housing shell 2, two mufflers 42 are connected, the connecting flanges on their free ends 43 for air supply and discharge lines have (see. Fig. 3). Between the respective muffler 42 and the Housing part 9 of the associated housing shell 2 is a separate Foot part 44 (Fig. 1, 2) provided on a tubular projection 45 of the respective muffler 42nd placed and braced against the housing part 9. The Foot part 44 also has a footprint 40 and vertical holes 41 for anchoring screws. The tubular Approaches 45 are, for example, provided with an external thread and in an internal thread of the respective nozzle 6,7 limited.

Since all housing shells 2 are identical and the one-stage or multi-stage version of the side channel compressor each axially outer housing shells 2 structurally identical air intake pipe 6 and air outlet 7 can carry the muffler 42 with the foot part 44 and the lid 37 against each other be swapped, i. that the muffler 42, related to the figures 1, 2 on the right side of the impeller housing 1 come to rest, if this is the special installation conditions of the side channel compressor appear appropriate to let. Of course, instead of the silencer 42 and / or additionally other air guide elements, eg connection pipes or hoses, valves, Pipe bends and the like occur, as is known is.

While in the illustrated embodiment, the two in each case an impeller housing 1 or 1a forming housing shells 2 by the radially outer ring 28 against each other centered, the arrangement could also be made that way be that the ring 28 on the inside of the Housing shells 2, i. arranged in the region of the side channels 5 is, so that is a similar arrangement as in the centering ring 32 between the two impeller housing 1, 1a. It should be noted that also the centering ring 32 could be located radially outward, i. corresponding the ring 28.

The side channel blower described above has, as explained, the same design housing shells. 2 on, each joined to a wheel housing 1, 1a wherein, as illustrated in FIGS. 4, 5, Also several impeller housing 1, 1 a flanged axially together as a multi-stage side channel blower to accomplish. The invention is not to such embodiments of side channel blowers limited. The impeller housing 1 or 1a in the axial direction traversing channel 12 can in the same way at be provided other side channel compressors. He can on the respective impeller housing side also connection devices, For example, in the form of a central thread or of flanges, etc. assigned for Fluidzu- and -ableitungen be.

The longitudinal channel 12 may also be in each end shield 2 by at least one molded partition wall 120 as shown in FIG 5 is indicated by dashed lines for a housing shell 2, divided into axially parallel to each other sub-channels be. This creates the possibility of several separate fluid streams, - possibly in Counterflow - through the respective impeller housing 1, 1a perform.

Finally, there is also the possibility of housing shells 2 in such a way that in the housing shell itself a connection between the air intake or air outlet 6, and 7 and the longitudinal channel 12 is present. Such a training opens, e.g. the possibility of compressor stages a multi-stage side channel compressor via the axially continuous channel 12 suction or pressure side to switch in parallel.

The idea according to the invention is finally independent of the type of through the respective side channel compressor to be funded medium. If therefore of simplicity in the description and in the claims For example, from an "air" suction or -auslassstutzen 6 and 7 respectively there is no restriction, but all gaseous media are included.

The impeller shaft 10 is in the illustrated two-stage Embodiment of FIG. 4 in one piece over the length of both compressor stages continuously represented and how explained, stored only in a single roller bearing 16. However, embodiments are also conceivable in which Each of the two compressor stages has its own impeller shaft is assigned and the waves each by a front-side driver in the form of a positive shaft coupling Coaxially connected to each other. In this Trap is the impeller shaft contained in the impeller shell 1 stored in two bearings 16, which in the two Bearing housing 14 of this impeller housing 1 are used. In the dargestellen two-stage embodiment is sufficient for the other impeller housing 1a, a single bearing, in particular by a in the electric motor 4 adjacent bearing housing 14 inserted bearings 16th is formed. The shaft coupling in the area of the interface between the two impeller housings 1, 1a is expediently designed so that they are about existing unavoidable Misalignment between the waves in the two impeller housings 1, 1a compensates.

Claims (17)

Side channel compressor with an annular impeller housing (1,1a), which is a rotatably mounted in it Impeller (3) encloses and with an air intake and an air outlet (6, 7) is provided and at the impeller housing has a continuous channel (12) having, in the axial direction of a housing side extends to the opposite side of the housing. Side channel compressor according to claim 1, characterized in that the impeller housing (1, 1a) is formed with two shells. Side channel compressor according to one of the preceding claims, characterized in that the channel (12) in the region between the air intake and the air outlet port (6; 7) is arranged. Side channel compressor according to claim 2 or 3, characterized in that the two housing shells (2) designed the same and sealed along a plane perpendicular to the impeller axis extending separating plane are arranged abutting each other. Side channel compressor according to claim 4, characterized in that each of the two housing shells (2) has a molded Luftansaug- and an integrally formed Luftauslassstutzen (6,7) that in each of the two housing shells (2) an axial channel part (1,1a) is formed and that when the housing shells (2) are joined to the impeller housing, the axially continuous channel (12) consists of the channel parts which are sealed to one another. Side channel compressor according to claim 5, characterized in that the unused Luftansaug- or Luftauslassstutzen (6,7) of a housing shell by blocking means (37) is closed. Side channel compressor according to one of the preceding claims, characterized in that it is multi-stage with at least two axially interconnected impeller housings (1,1a), each with its own impeller (3) is formed and that the channels (12) of the axially adjacent impeller housing (1,1a ) are connected to a common, through the impeller housing continuous axial channel with each other. Side channel compressor according to claim 7, characterized in that the air intake or the air outlet port (6,7) of at least two compressor stages via the axial channel (12) are connected in series or in parallel. Side channel compressor according to one of the preceding claims, characterized in that on the impeller housing (1; 1a), at least on one side, deflection means (36) are placed, which are in fluid communication with the air intake or the air outlet port (6,7). Side channel compressor according to one of the preceding claims, characterized in that it comprises foot parts (39, 44) which are detachably connected to the respective impeller housing (1, 1a). Side channel compressor according to claims 4 and 10, characterized in that the foot parts (39, 44) are connected to housing shells (2) of the impeller housings (1, 1a) in the regions of their air intake and / or air outlet stubs (6, 7). Side channel compressor according to claims 6 or 9, characterized in that the blocking means (37) and / or the deflection means are connected to a foot piece (39) or have an integrally formed foot piece. Side channel compressor according to one of the preceding claims, characterized in that the channel (12) end connection or connecting means (11) are associated. Side channel compressor according to claim 13, characterized in that the connection or connection means have a mating surface (11). Side channel compressor according to one of the preceding claims, characterized in that the channel (12) is flowed through by a cooling medium. Side channel compressor, according to one of the preceding claims, characterized in that the channel (12) is divided by at least one intermediate wall (120) in longitudinally parallel partial ducts. Side channel compressor according to one of the preceding claims, characterized in that the air intake or the air outlet port (6,7) of at least one impeller housing (1,1a inside the housing with the channel (12) is connected.

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