EP3935283A1 - Seitenkanalgebläse - Google Patents
SeitenkanalgebläseInfo
- Publication number
- EP3935283A1 EP3935283A1 EP19710651.1A EP19710651A EP3935283A1 EP 3935283 A1 EP3935283 A1 EP 3935283A1 EP 19710651 A EP19710651 A EP 19710651A EP 3935283 A1 EP3935283 A1 EP 3935283A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing part
- side channel
- impeller
- channel
- electric motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D23/00—Other rotary non-positive-displacement pumps
- F04D23/008—Regenerative pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/403—Casings; Connections of working fluid especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/50—Inlet or outlet
- F05D2250/52—Outlet
Definitions
- the invention relates to a side channel blower with an electric motor with a drive shaft, an impeller which is attached to the drive shaft, and a blower head with a flow channel which has a first side channel which is axially opposite to a first row of impeller blades of the impeller and a second Has side channel, which is axially opposite to a second row of impeller blades of the impeller, wherein the fan head has a first housing part in which the first side channel is formed and which axially delimits at least one space in which the electric motor is accommodated, and a second housing part, which is fastened to the first housing part, in which the second side channel is formed and which has an inlet and an outlet channel.
- Both side channel blowers and pumps are well known and are used in internal combustion engines, for example, as secondary air blowers or blowers for the regeneration of gasoline particulate filters.
- Both side channel blowers with a side channel or with two side channels opposite one another on both axial sides of the impeller, which are connected to one another via a gap between the surrounding housing and the radial outer edge of the impeller, are known.
- These side channel blowers are mostly driven by an electric motor, on whose shaft the impeller is attached and which is arranged in a motor housing.
- the side channels are mostly connected to one another like a flange Formed flow housing parts, wherein the closer to the electric motor arranged flow housing part can also be designed as a motor housing if this is closed from the opposite side by a cover.
- blower head is constructed in two parts, a first housing part axially delimiting the electric motor and having a side channel.
- This housing part extends axially as far as an edge of the impeller remote from the electric motor and forms a parting plane there for a second housing part, which has the second side channel and an axial inlet and a radial outlet.
- This parting plane also serves as a support surface through which screws for fastening the second housing part to the first housing part are inserted, which screws are screwed into the first housing part.
- a disadvantage of such a side channel blower is that pressure losses occur at the outlet due to the deflection. If a tangential outlet were to be implemented, its cross section would have to be reduced in comparison to the cross section of the flow area in the fan, which again results in an undesirable pressure loss.
- the task is therefore to provide a side channel blower which can be installed even with low manufacturing tolerances is simplified and the existing axial gaps are minimized.
- the efficiency should be improved by reducing the pressure losses, especially at the outlet. This object is achieved by a side channel blower with the features of main claim 1.
- the outlet channel extends over the entire height and width of the flow channel, which is formed by the two side channels, the space in which the impeller blades rotate and the radial gap between the impeller and the surrounding housing.
- the tangential arrangement of the outlet channel means that it extends along a tangent at the end of the flow channel.
- the first housing part has a parting plane to the second housing part, which is axially offset in the direction of the second housing part to the axial end of the wall delimiting the second housing part radially outwardly and offset radially inwardly to the axial end of the wall is formed.
- the position of the second housing part in relation to the first housing part is determined in the radial direction.
- the parting plane is arranged axially slightly closer to the electric motor than the axial ends of the first row of impeller blades facing the electric motor. This arrangement of the parting plane allows the impeller to be mounted with a defined gap to the first housing part, for example by placing a spacer gauge on the second housing part, on which the impeller is in turn placed and connected to the impeller in this position.
- the axial end of the wall of the second housing part preferably protrudes into a circumferential axial groove in the first housing part.
- a meterable seal in particular a liquid seal, is arranged in the circumferential axial groove between the first housing part and the second housing part, thereby ensuring a tight fastening between the two housing parts and avoiding leaks through a gap between the two housing parts.
- the attachment can be made detachable by screwing
- the hub of the impeller has a transition fit to the drive shaft and is connected to the drive shaft with a material fit.
- the impeller is not loaded by bending, as would be the case when pressing on when making a press connection. Instead, the impeller can be pushed onto the drive shaft with a small amount of force and positioned in its correct position and, for example, held by a spacer gauge and then connected to the drive shaft in a materially bonded manner in this position, whereby the axial gap between the first housing part and the impeller can be set very precisely can be.
- a further simplification of the design of the side channel blower results from the fact that the first housing part radially surrounds the electric motor, so that no additional component has to be used to accommodate the electric motor.
- the drive shaft of the electric motor is preferably mounted in a wall of the first housing part that axially delimits the electric motor. An axial displacement of the electric motor or the drive shaft relative to the first housing part is accordingly prevented, so that the axial gap can be selected to be very narrow.
- the first housing part can also serve directly as a bearing plate for the electric motor, so that its position in the housing is also fixed with simple means.
- the impeller is made from a thermosetting plastic which has a high level of durability at low manufacturing costs.
- a side channel blower is thus created which has a very high degree of efficiency, since pressure losses are reduced by avoiding constrictions in the area of the outlet channel and short-circuit flows along the inside of the impeller are reduced small adjustable axial gap compared to known designs can be reduced without increasing the manufacturing costs.
- FIG. 1 shows a side view of a section of a side channel blower according to the invention in a sectional illustration.
- FIG. 2 shows the detail according to FIG. 1 before a second housing part is assembled
- the side channel blower according to the invention has an electric motor 10, which is received in a space 11, which in the present embodiment is formed in a first housing part 12, and which is closed on a rear side of the electric motor 10 by a cover, not shown.
- the first housing part 12 forms with a second housing part 16 a blower head 18 in which an impeller 20 is rotatably arranged, which is attached to a drive shaft 22 of the electric motor 10.
- the first housing part 12 has a central opening 26 in a wall 24 axially delimiting the blower head 18 to the electric motor 10, through which the drive shaft 22 protrudes on the one hand into the blower head 18 and to the impeller 20 and on the other hand is designed as a receptacle 28 of a motor bearing 30.
- a first side channel 32 is formed on the side facing the impeller 20. This acts with a first row 34 over the radially outer one Perimeter of the impeller 20 evenly distributed impeller blades 36 together.
- the fan head 18 additionally has the second housing part 16 in which a second side channel 40 is formed, which is formed axially opposite a second row 42 of impeller blades 36 and interacts with them.
- this second housing part 16 has a wall 46 which radially delimits a flow channel 44, which radially surrounds the impeller 20 and delimits the housing part 16 radially on the outside over the circumference, a gap 48 being formed between the impeller 20 and the wall 46.
- the flow channel 44 accordingly consists of the two side channels 32, 40 as well as the area through which the flow passes between the impeller blades 36 and the gap 48.
- an axial inlet channel 49 is formed on the first housing part 12, which extends axially next to the space 11 and merges into the second housing part 16, where the pumped gas enters the side channels 32, 40 axially via an inlet 50.
- an outlet channel 52 arranged tangentially to the side channels 32, 40 is formed on the second housing part 16.
- the two side channels 32, 40 and the wall 46 have a common, invisible interruption area between the outlet channel 52 and the inlet 50, in which the wall 46 and the bottoms 53, 54 delimiting the side channels have an elevation so that around the impeller 20, only minimal gaps are formed over the interruption area, so that a flow from the outlet channel 52 to the inlet channel 49 is minimized.
- the impeller blades 36 are formed on an outer circumference of the impeller 20 and are bent or V-shaped in the direction of rotation of the impeller 20 from their radially inner end to the radially outer end.
- the two rows 34, 42 are separated from one another at least up to approximately the middle of the radial extent of the impeller blades 36 by a partition 56, while in the radially outer area the impeller blades 36 of the first row 34 and the second row 42 merge into one another, so that in this area an exchange between the two eddy currents in the two side channels 32, 40 can take place.
- the first housing part 12 has a bearing surface 58 to which the second housing part 16 is fastened by means of screws 59, which is designed as an axial groove 60, which in the present embodiment is approximately at the level of the receptacle 28 for the motor bearing 30 and thus axially closer according to the invention is arranged to the electric motor 10 than the bottom 53 of the first side channel 32, specifically in the area in which the side channel 32 opens into the outlet channel 52.
- wall 46 extends axially in this area into axial groove 60, so that an axial end 71 of wall 46 is also axially closer to electric motor 10 than bottom 53 of first side channel 32
- Executed cross-section which has a largely continuous transition to the flow channel 44, the height of which extends approximately from the bottom 53 of the first side channel 32 to the bottom 54 of the second side channel 40 and whose width is also approximately the width of the flow channel 44 or the side channels 32 .40 corresponds.
- the circumferential axial groove 60 of the bearing surface 58 is made wider in the areas of the screw connection, so that the wall 46 of the second housing part 16 corresponds to the shape of the axial groove 60 Widenings are carried out at their axial end 71, in which the bores for receiving the screws 59 are received. Correspondingly, the axial end 71 of the wall 46 rests in the axial groove 60.
- a meterable seal 62 in particular a liquid seal, is arranged in the axial groove 60 between the axial end 71 and the bearing surface 58.
- the axial groove 60 is located directly radially adjacent to a radially outer boundary wall 64 of the first side channel 32, which extends axially perpendicularly from the support surface 58 in the direction of the second housing part 16.
- This boundary wall 64 on the inside of which the first side channel 32 is formed, extends to a parting plane 66 which runs parallel to the support surface 58 of the first housing part 12 and which is only 0.1 to 1 mm axially closer to the electric motor 10 than the impeller 20 in its installed state. This means that the axial gap between the impeller 20 and the first housing part 12 is precisely defined between this parting plane 66 and the impeller 20.
- a spacer gauge or the like which has the width of the axial gap, can be placed on the parting plane 66 and then the impeller 20 with its hub 68 can be slipped over the drive shaft 22 so that the desired Axial gap is set by the bearing of the impeller 20 on the spacer gauge.
- a transition or small clearance fit is selected between a hub 68 and the drive shaft 22, since a support of the drive shaft 22 can then be dispensed with.
- the hub 68 is in this position attached to the drive shaft 22 in a materially bonded manner, or by welding, laser welding or gluing.
- the distance gauge can then be removed and the desired axial gap is set without this a force must be exerted on the drive shaft 22 or an impeller 20 made, for example, of thermosetting plastic. Accordingly, deformation during assembly can be reliably avoided.
- the assembly of the second housing part 16 is then carried out in that this housing part 16 is pushed over the radially outer boundary wall 64 and against the support surface 58 into the axial groove 60. In this state, the end of the wall 46 rests on the support surface 58, while a shoulder of the second housing part 16 is arranged adjacent to the boundary wall 64 at a slight distance from the end of the boundary wall 64.
- the connection between the two housing parts 12, 16 can then be established by screws, it also being possible to establish an attachment by gluing or, if necessary, welding.
- a side channel blower of this type has a very high degree of efficiency due to the precise setting of the gaps and the precise alignment of the impeller on the drive shaft, which also results from the assembly, since leakage flows can be minimized.
- the pressure loss is reduced by the large cross-section of the outlet channel and the avoidance of cross-sectional jumps and the efficiency is additionally increased.
- the invention is not restricted by the exemplary embodiment described, but that various modifications are possible.
- the design of the side channels or the impeller or the division of the first housing part can be modified.
- the electric motor can also be accommodated in a space closed on the rear by a motor housing, which is only axially limited by the first housing part on the side facing the flow channel.
- the parting line can also be used as a Support surface of the two housing parts are used and the support surface of the exemplary embodiment are instead arranged at a small distance from the axial groove.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2019/055833 WO2020182270A1 (de) | 2019-03-08 | 2019-03-08 | Seitenkanalgebläse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3935283A1 true EP3935283A1 (de) | 2022-01-12 |
| EP3935283B1 EP3935283B1 (de) | 2024-01-10 |
Family
ID=65763445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19710651.1A Active EP3935283B1 (de) | 2019-03-08 | 2019-03-08 | Seitenkanalgebläse |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP3935283B1 (de) |
| WO (1) | WO2020182270A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115095555B (zh) * | 2022-07-25 | 2024-06-25 | 中国华能集团清洁能源技术研究院有限公司 | 调压组件及压力匹配器 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1403579A1 (de) * | 1961-03-04 | 1969-07-17 | Obermaier & Cie | Turbogeblaese |
| US5527149A (en) | 1994-06-03 | 1996-06-18 | Coltec Industries Inc. | Extended range regenerative pump with modified impeller and/or housing |
| DE102007045480A1 (de) * | 2007-09-21 | 2009-04-02 | DüRR DENTAL AG | Rad, insbesondere Laufrad eines Verdichters |
| DE102009006652B4 (de) * | 2009-01-29 | 2014-06-18 | Pierburg Gmbh | Seitenkanalgebläse, insbesondere Sekundärluftgebläse für eine Verbrennungskraftmaschine |
| JP5885986B2 (ja) * | 2011-10-04 | 2016-03-16 | 日本電産サンキョー株式会社 | ポンプ装置 |
| DE102015000264B4 (de) * | 2015-01-16 | 2026-03-26 | Pierburg Gmbh | Gebläse zur Förderung von Wasserstoff in einem Brennstoffzellensystem eines Kraftfahrzeugs |
| EP3728859A1 (de) * | 2017-12-21 | 2020-10-28 | Pierburg GmbH | Seitenkanalgebläse, insbesondere sekundärluftgebläse für eine verbrennungskraftmaschine |
-
2019
- 2019-03-08 EP EP19710651.1A patent/EP3935283B1/de active Active
- 2019-03-08 WO PCT/EP2019/055833 patent/WO2020182270A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| EP3935283B1 (de) | 2024-01-10 |
| WO2020182270A1 (de) | 2020-09-17 |
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