EP2142805B1 - Side channel compressor - Google Patents

Abstract

The side channel compressor (1) has a suction channel (14) and a blow-out channel (15), which are combined in a common housing (9) with a common partition (13) separating channels (11,12). The blow-out channel comprises an insulation (18) and the suction and blow-out channels have a parallel path, where an exchangeable switching insert is associated with a connection region is further provided on the side channel compressor.

Description

The invention relates to a side channel compressor according to the features of the preamble of claim 1.

Side channel blowers of the type in question are known from the prior art in various embodiments. These allow a wide range of industrial applications, for example in the printing, packaging, electronics, environmental, medical, etc. These turbomachines have at least one annular working chamber with a substantially circular cross-section, in which a bladed impeller is rotatably received. The adjacent to the blading cross-section of the working space forms the side channel, which is interrupted at the periphery by a breaker. In the direction of rotation or circulation of the impeller behind the breaker is an air inlet channel, while lying in the direction of rotation in front of the breaker, an air outlet channel. It is also known to provide several compressors. Thus, for example, in a so-called dual-flow compressor, the impeller is provided on both sides with a blading, wherein the respectively adjacent to the blading cross sections of the work spaces form side channels. Each side channel thus created is provided with an air inlet and an air outlet channel.

At one of the DE 24 33 094 A1 known side channel compressor, a plate-like deflection device is provided, which can be selected for the respectively desired mode of operation, series connection or parallel connection.

Based on the cited prior art, the invention provides the task of specifying a side channel compressor with a simple and cheap Umschalteinsatz. This object is achieved in the subject matter of claim 1, being based on the fact that the cover plate has a perpendicular thereto directed closure wall.

The intake duct and the exhaust duct are combined in a common housing, with a common, channels but the partition wall, wherein in any case the exhaust duct has an insulation and the intake and Ausblaskanäle are performed in parallel, wherein further assigned to a connection area to the side channel blower an interchangeable Umschalteinsatz is provided , By combining the intake and exhaust duct in a common housing a compact design is achieved. The channels extend in parallel position within the housing provided for this purpose. Due to the proposed insulation in any case of the blow-out channel sufficient thermal insulation between the airways is given. A heating, in particular an excessive heating of the sucked air in the intake passage through the blown air in the blow-out is counteracted thereby. It is thus a thermal insulation of the hot exhaust air through the insulation material and thus achieved a decoupling of the cold supply air. The intake passage is in fluid communication with the air inlet ducts of the preferably multi-flow side channel blower, as well as the air outlet ducts with the blow-out duct. The arrangement of provided in the connection area to the side channel compressor, interchangeable Umschalteinsatzes given the possibility by simple means a multi-flow side channel compressor in a multi-stage compressor or vice versa, just by arranging the corresponding switching insert with the perpendicular thereto directed closure wall. Depending on the configuration of the Umschalteinsatzes the intake is connected to mehrflutigen training with all air inlet ducts of the side channels, as well as the air outlet ducts of all side channels with the blow-out. By arranging a correspondingly shaped other changeover insert, for example, the intake duct is connected only to the air inlet duct of a first side channel compressor, while the air outlet duct of this side duct is connected in terms of flow via the changeover insert to the air inlet duct of the next side duct. hereby a multi-stage operation of the side channel compressor is achieved. The Umschalteinsatz can be accessible from the outside, to change the same in a break in operation of the side channel compressor. In this regard, an embodiment is preferred in which the changeover insert is located directly in the connection region between the the intake passage and the blow-out receiving housing and the side channel blower is arranged in a hiding position. A change of the Umschaltseinsatzes is accordingly possible only by disassembly of the connection area.

In a further development of the subject invention it is provided that the housing serves as a base for the side channel compressor including the associated motor and the control electronics. For example, the housing may be elongated with a further, for example, substantially rectangular cross-section. Other cross-sections are possible, so on, for example, cross-sections with circular sections. Side channel compressor and the associated motor are preferably arranged connected in series along a rotation axis. The housing is provided for this purpose, aligned with the axis of rotation unterflurseitig. In connection with the intended isolation, in particular of the blow-off channel, the cool intake air, which is uninfluenced by the blow-off flow, can at the same time also be used to cool the housing due to the selected underfloor-side arrangement, and this further with a preferred thermally conductive connection of housing and side channel blower or motor. Intake passage and exhaust passage in the housing are further preferably aligned in a space-parallel arrangement to the axis of rotation of the impellers or the motor.

In one embodiment of the subject invention, it is provided that the channels on the one hand, the side channel blower with flanged motor on the other hand and beyond the control electronics are arranged one above the other like a pile, wherein the channels or the housing receiving the channels preferably a lowermost floor, the side channel compressor with the flanged engine forms a middle floor and the control electronics mounted on the engine an upper floor.

In a further preferred embodiment, the channels comprising the housing of a metal material, so further preferably in the form of an extruded profile, in particular aluminum extruded profile. The switching insert, however, is preferably made of a plastic material, so in particular as an injection molded part.

For improved cooling of in particular motor and side channel compressor, a cooling air blower is provided axially flanged to the electric motor. This is driven directly via the electric motor - optionally with the interposition of a transmission or reduction - and causes in a preferred arrangement of the cooling air blower on the side of the channel compressor side facing away from the electric motor, a cooling air flow aligned along the impeller and motor axis. For this purpose, in particular, the engine and the side channel compressor can be sheathed to form a cooling air flow channel between the shell and the outer walls of the side channel compressor and motor, which outer walls can also have axially aligned cooling fins. Motor, compressor and the electronics are thermally conductive connected in a further development, so as to provide a temperature compensation.

Fig.1

in Stirnansicht einen Seitenkanalverdichter der in Rede ste- henden Art unter Fortlassung von stirnseitigen Abdeckun- gen;

Fig. 2

den Seitenkanalverdichter in einer Perspektivdarstellung;

Fig. 3

in perspektivischer Darstellung den Seitenkanalverdichter mit angeflanschtem Elektromotor und Kühlluftgebläse so- wie einer Steuerelektronik unter Fortlassung der stirnseiti- gen Abdeckung und einer Luftführungs-Halbschale;

Fig. 4

in perspektivischer Darstellung ein, einen Ansaugkanal und einen Ausblaskanal zusammenfassendes Gehäuse mit einem auswechselbaren Umschalteinsatz;

Fig. 5

in perspektivischer Rückansicht das geschnittene Gehäuse mit einem gesondert dargestellten, gegenüber dem Um- schalteinsatz gemäß Fig. 4 geänderten Umschalteinsatz;

Fig. 6

eine der Fig. 4 entsprechende Darstellung, jedoch bei Bestü- ckung mit dem Umschalteinsatz gemäß Fig. 5;

Fig. 7

den Seitenkanalverdichter in Perspektive, eine zweite Aus- führungsform betreffend.

The invention with reference to the accompanying drawings, which illustrates only two embodiments, explained in more detail. It shows:

Fig.1

in front view, a side channel compressor of the type in question, omitting frontal covers;

Fig. 2

the side channel compressor in a perspective view;

Fig. 3

a perspective view of the side channel compressor with flange-mounted electric motor and cooling air blower and a control electronics, omitting the front-side cover and an air guide half shell;

Fig. 4

in a perspective view, a suction channel and a discharge channel summary housing with a removable Umschalteinsatz;

Fig. 5

in a perspective rear view of the cut housing with a separately shown, compared to the changeover insert according to Fig. 4 modified changeover insert;

Fig. 6

one of the Fig. 4 corresponding representation, however, when fitted with the changeover insert according to Fig. 5 ;

Fig. 7

the side channel compressor in perspective, concerning a second embodiment.

Shown and described is a side channel compressor 1, which is formed in the illustrated embodiment as a double-flow compressor. Accordingly, two side channels are provided which cooperate with a double-sided bladed impeller, not shown. The impeller of the side channels is driven by an electric motor 2. This is flanged to the side channel compressor. The motor rotary shaft is rotatably connected to the impeller, wherein fan axis and motor axis form a common axis x. The motor is externally provided with axially aligned cooling fins 3. These extend over the entire length of the motor to the side channels, this with a constant axial contour for trouble-free flow around on the side channel compressor 1 side facing away from the Electric motor 2 is a cooling air blower 4 is flanged to the electric motor 2. Whose fan 5 is rotatably connected to the motor shaft in connection, according to which the cooling air blower 4 is driven directly via the electric motor 2.

On the electric motor 2 and the motor housing, an electrical connection housing 6 is mounted. This also includes the electronics for controlling the electric motor 2 and the side channel compressor. 1

The outer wall of the electric motor 2 provided with the cooling ribs 3 and the cooling-air fan 4 are covered by air-guiding shells 7. These are formed as plastic profiles which are clipped onto the cooling ribs 3. As a result, the air guide shells 7 are decoupled to the engine 2 and provide a corresponding sound attenuation of the entire device.

The air guide shells 7 extending from the side channel compressor, over the entire length of the electric motor 2, the cooling air fan 4 comprising. As a result, an air flow guide is achieved along the electric motor 2, so that the cooling air flow built up by the cooling air blower 4 is guided along the motor housing. At the same time the compressor is cooled by this air flow. Engine 2, compressor and electronics are thermally conductively connected in the longitudinal direction, which further contributes to a temperature compensation.

Front side, d. H. assigned to the cooling air blower 4 of the defined by the air guide shells 7 cooling air flow channel of a grid-like and correspondingly air-permeable end wall 8 is covered.

Unterflurseitig the electric motor 2 extends approximately rectangular in cross-section housing 9. This consists in the illustrated embodiment of an aluminum extruded profile. This housing 9 extends over the entire length of the through the cooling air blower 4, the electric motor. 2 and the side channel compressor 1 formed unit. The width considered transversely thereto corresponds in the illustrated exemplary embodiment to the width, measured transversely to the axis x, of the unit seated on the housing 9, including the attached air guide shells 7 (cf. Fig.1 ).

The housing 9 accordingly serves as a base 10 for the electric motor 2 and the side channel compressor 1.

The housing 9 forms in cross-section as shown in FIG Fig. 1 two separate channels 11 and 12. These are formed by a central, vertically oriented partition 13, which is formed of the same material, integral with the housing wall. Through the central partition wall 13 two equal in cross-section channels 11 and 12 are provided, which run channels 11 and 12 aligned along the axis x over the entire length of the housing 9. It is also possible an outboard arrangement for the formation of different sized channel cross sections.

End side, associated with the side channel compressor 1, the housing 9 is closed, this further under strict separation of the channels 11 and 12.

The channels 11 and 12 receive an intake passage 14 and an exhaust passage 15 for operating the side channel compressor 1. Intake passage 14 and exhaust passage 15 are tubular shape and extend almost over the entire length of the housing. 9

The side channel compressor 1 facing away from the end face of the housing 9 is closed with a, connection openings 16 having cover 17.

At least the blow-out channel 15 is comprised of a heat-insulating insulation 18. Also, the intake passage 14 may have such insulation. The housing cover 19 facing the electric motor 2 has a cross-sectional configuration such that an air guide slot 20 extending in the axial direction is set up between the electric motor 2 and the housing 9. By this 4 more cooling air is sucked during operation on the cooling air blower.

The intake and exhaust ducts, which are received in the housing 9 acting as a muffler, are in fluid communication with the air inlet and air outlet ducts of the side ducts. For this purpose, in the housing cover 19, associated with the side channel compressor 1, a connection region 21 is provided, in which there is a deflection of the inflowing or outflowing air by 90 ° from a direction perpendicular to the axis x aligned flow in a directed in the axial direction of flow.

Is, as provided in the illustrated embodiment, the side channel compressor 1 two-flow design, d. H. provided with two side channels, as well as two air inlet ducts and two air outlet ducts, which are in each case in connection with the suction and Ausblaskanälen, formed. By inserting a changeover insert 22 in the connection region 21, the optional configuration of the side channel compressor 1 is possible either as a double-flow compressor or as a two-stage compressor and, moreover, also by means of suitable shut-offs as a single-flow compressor.

For each configuration, a changeover insert 22 or 22 'is provided. In Fig. 4 a Umschalteinsatz 22 is shown for dual-flow operation of the side channel compressor 1. This switching insert 22 is made as a plastic part by injection molding and has a square in plan square cover plate 23. This can be used stop limited in an adapted, the channels 11 and 12 of the housing 9 in the area of the housing cover 19 cross recess 24 in the connection area 21. Below the cover plate 23 extends vertically down a closure wall 25. This engages in a correspondingly adapted Section 26 of the housing partition wall 13 a, for sealing closure of this cutout 26 and thus to ensure the fluidic separation of the intake passage 14 and exhaust passage 15th

In the cover plate 23 are each associated with the not shown air inlet and outlet channels of the side channels inlet openings 27 and outlet openings 28 are formed, wherein the inlet openings 27 are associated with the intake passage 14 and the outlet openings 28 of the exhaust passage 15.

By means of this switching insert 22, both side channels are operated independently of one another, this under flow via a common intake channel 14 and outflow via a common blow-out channel 15.

For two-stage operation of the side channel compressor 1, the air outlet channel of the first side channel is to be short-circuited to the air inlet channel of the second side channel. This comes in the Fig. 5 and 6 shown Umschalteinsatz 22 'used. Also, this first has a cover plate 23 and a perpendicular thereto downwardly directed closure wall 25. In the cover plate 23, an inlet opening 27 is provided for a first side channel and an outlet opening 28 for the second side channel, which openings directly to the intake passage 14 and Outlet 15 are in communication.

The outlet opening 28 of the first side channel and the inlet opening 27 of the second side channel are short-circuited in this switching insert 22 'via a connecting channel 29 formed in the switching insert 22'. This is trough-like underside of the cover plate 23, the closure wall 25 formed by passing.

For side channel compressors, which have more than two side channels, such as four side channels, for example, there is a correspondingly greater choice different Umschalteinsätze 22 and 22 'before, so on, for example, the four-flow, single-stage operation or double-flow, two-stage or beyond the single-flow four-stage operation of the side channel compressor. 1

The changeover insert 22 or 22 'is sealingly in the recess 24 and further sealing in the cutout 26, wherein the seal can be achieved for example by plastically deformable edges on the switching insert formed as a plastic part 22 or 22'. In addition, by gluing or by arranging a sealing bead or the like.

The housing 9 and the above arranged unit of electric motor 2 and side channel compressor 1 are further thermally conductively connected so that the guided through the intake duct 14 cold suction air flow can be used for housing cooling. The opposite hot exhaust air in the exhaust duct 15 is thermally decoupled by the insulation 18.

Fig. 7 shows a second embodiment of the side channel compressor 1, in which the housing 9 is not arranged unterflurseitig, but rather with the interposition of an adapter 30 is seated on the side channel compressor, this including a right angle to the axis x.

Claims (6)

1. Side channel compressor (1) comprising two side channels, comprising a suction channel (14) and a blow-out channel (15), the suction channel (14) and the blow-out channel (15) being combined in a common housing (9), comprising a common partition wall (13) which separates the channels (11, 12), the suction and blow-out channels (14, 15) being guided in parallel and an exchangeable switching insert (22, 22') being provided, the blow-out channel (15) in any case further comprising an insulation (18), the switching insert (22, 22') being associated with a connection region (21) on the side channel compressor (1) and the switching insert comprising a cover plate (23) with an inlet opening (27) provided in the cover plate (23) for a first side channel, and a discharge opening (28) provided in the cover plate for the second side channel, characterised in that the cover plate (23) has a closing wall (25) oriented perpendicular thereto.
2. Side channel compressor (1) according to claim 1, characterised in that the housing (9) serves as a base (10) for the side channel compressor (1) including the associated motor (2) and the control electronics.
3. Side channel compressor (1) according to either claim 1 or claim 2, characterised in that a connection region (21), which is associated with the side channel compressor (1), is formed in the upper face (19) of the end housing (9), which is associated with the side channel compressor, is closed and extends over the entire length of the unit formed by a cooling air fan (4), the electric motor (2) and the side channel compressor (1), in which connection region the inflowing and outflowing air is deflected by 90° from a flow oriented perpendicular to the axis (x) of the channels (11, 12) into a flow directed in the axial direction.
4. Side channel compressor according to any one of claims 1 to 3, characterised in that the channels (14, 15), the side channel compressor (1) with the flange-mounted motor (2) and also the control electronics are arranged above one another in a tiered manner.
5. Side channel compressor according to any one of claims 1 to 1, characterised in that the housing (9) combining the channels (14, 15) consists of a metal material and the switching insert (22, 22') consists of a plastics material.
6. Side channel compressor according to any one of claims 1 to 5, characterised in that a cooling air fan (4) is provided flange-mounted axially on the electric motor (2).

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