WO2008125630A1

WO2008125630A1 - Side channel compressor

Info

Publication number: WO2008125630A1
Application number: PCT/EP2008/054427
Authority: WO
Inventors: Antje Gennat; Ulli Kriebel; Witali Winter; Rudolf Bahnen
Original assignee: Gebr. Becker Gmbh
Priority date: 2007-04-13
Filing date: 2008-04-11
Publication date: 2008-10-23
Also published as: DE102007017915A1; EP2142805B1; EP2166232B1; EP2166232A1; ATE521809T1; EP2142805A1

Abstract

The invention relates to a side channel compressor (1) comprising a suction channel (14) and a blow-out channel (15). In order to advantageously improve a side channel compressor of the type discussed here with a simple structure that is as compact as possible, the invention proposes that the suction channel (14) and the blow-out channel (15) be combined in a common housing (9) comprising a common partition (13) separating channels (11) and (12), wherein in every case the blow-out channel (15) comprises an insulation (18) and the suction and blow-out channels (14, 15) have a parallel path, wherein an exchangeable switching insert (22, 22') associated with a connection region (21) is further provided on the side channel compressor (1).

Description

Side Channel Blowers

The invention relates to a side channel compressor with a suction channel and a blow-out.

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 space with a substantially circular cross-section, in which a bladed impeller is received rotatably. 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 with blading on both sides, wherein the cross sections of the work spaces adjoining the blading each form side channels. Each side channel thus created is provided with an air inlet and an air outlet channel.

In view of the above-described prior art, a technical problem of the invention is considered to improve a side channel compressor of the type in question with a simple and compact as possible structure in an advantageous manner.

This problem is solved first and foremost by the subject matter of claim 1, wherein it is made clear that the intake duct and the blow-out duct are combined in a common housing, with a common, ducts and the partition wall, wherein in any case the blow-out Channel has an insulation and the suction and Ausblaskanäle are performed in parallel, further associated with a connection area to the Seitenka- cal compressor a replaceable changeover insert 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 by 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-duct side duct compressor, as well as the air outlet ducts with the blow-out duct. The arrangement of a provided in the connection area to the side channel blower, interchangeable Umschalteinsatzes given the possibility by simple means a multi-flow side channel blower in a multi-stage compressor or vice versa, this just by arranging the corresponding Umschalteinsatzes. 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. As a result, a multi-stage operation of the side channel compressor is achieved. The change-over insert can be accessible from the outside, for changing it in an operating pause 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.

Furthermore, features are described which preferably have in combination with the features of claim 1 meaning, but in principle may have meaning with only some features of claim 1 or alone.

Thus, it is provided in a development of the subject invention 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 and Ausblaskanal in the housing are further preferably aligned in a space-parallel arrangement to the axis of rotation of the impellers or the motor.

In a further development 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 stacked one above the other, 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 side 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 motor and the side channel compressor can be sheathed, to form a cooling air flow channel between the shell and the outer walls of 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.

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

1 shows an end view of a side channel compressor of the type in question, omitting frontal covers;

Fig. 2 shows the side channel compressor in a perspective view; 3 is a perspective view of the side channel compressor with flange-mounted electric motor and cooling air blower and an electronic control unit, omitting the end-side cover and an air guide half shell;

4 shows a perspective view of a housing comprising a suction channel and a blow-out channel with an exchangeable change-over insert;

5 is a rear perspective view of the cut housing with a separately shown, compared to the changeover insert according to FIG 4 changed changeover insert ..;

Fig. 6 is a representation corresponding to FIG. 4, but 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 a Elektroanschlussge- 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, the cooling air flow channel defined by the air guide shells 7 is covered by a lattice-type and correspondingly air-permeable end wall 8.

Unterflurseitig the electric motor 2 extends approximately rectangular in cross-section housing 9. This consists in the illustrated embodiment of an aluminum extruded aluminum 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 corresponds in the illustrated embodiment of the measured transverse to the axis x width of the seated on the housing 9 unit including the attached air guide shells 7 (see 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. 1, two separate channels 11 and 12. These are formed by a central, vertically aligned partition wall 13, the same material, is integrally formed 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, a connection region 21 is provided in the housing cover 19, assigned to the side channel compressor 1, in which a deflection of the inflowing or outflowing air by 90 ° takes place from a flow directed perpendicular to the axis x into a flow directed in the axial direction.

Is, as provided in the illustrated embodiment, the side channel compressor 1 designed double-ended, 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 changeover insert 22 is shown for double-flow operation of the side channel compressor 1. This changeover 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. On the underside of the cover plate 23 extends vertically downwardly a closure wall 25. This engages in a accordingly ange- fit cutout 26 of the housing partition 13, 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. For this purpose, the switching insert 22 'shown in FIGS. 5 and 6 is used. This also initially has a cover plate 23 and a perpendicular thereto downward directed closure wall 25 in the cover plate 23 is an inlet opening 27 for a first side channel and an outlet opening 28 for the second side channel provided which openings directly with the intake passage 14 and . The exhaust passage 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.

All disclosed features are essential to the invention. The disclosure of the associated / attached priority documents (copy of the prior application) is hereby also incorporated in full in the disclosure of the application, also for the purpose of including features of these documents in claims of the present application.

Claims

1. Side channel compressor (1) with an intake duct (14) and a blow-out duct (15), characterized in that the intake duct (14 and the blow-out duct (15) are combined in a common housing (9) with a common, channels (11 ) and (12) but the partition wall (13), wherein in any case the exhaust duct (15) has an insulation (18) and the suction and Ausblaskanäle (14, 15) are guided in parallel, further assigned to a connection area (21) the side channel compressor (1) a replaceable

Switching insert (22, 22 ') is provided.

2. Side channel compressor according to claim 1 or in particular according thereto, characterized in that the housing (9) serves as a base (10) for the side channel compressor (1) including the associated motor (2) and control electronics.

3. Side channel compressor according to one or more of the preceding claims or in particular according thereto, characterized in that the channels (14, 15) on the one hand, the side channel compressor (1) with flanged motor (2) on the other hand and beyond the control electronics are arranged like a pile above the other.

4. Side channel compressor according to one or more of the preceding claims or in particular according thereto, characterized in that the channels (14, 15) summarizing housing (9) consists of a metal material and the switchover insert (22, 22 ') made of a plastic material ,

5. Side channel compressor according to one or more of the preceding claims or in particular according thereto, characterized that a cooling air blower (4) is provided axially flanged to the electric motor (2).