EP3236081B1 - Aus gebogenem blech hergestellte radialgebläse-schaufel mit einem naht auf der druck- oder saugseite - Google Patents

Aus gebogenem blech hergestellte radialgebläse-schaufel mit einem naht auf der druck- oder saugseite Download PDF

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Publication number
EP3236081B1
EP3236081B1 EP16166124.4A EP16166124A EP3236081B1 EP 3236081 B1 EP3236081 B1 EP 3236081B1 EP 16166124 A EP16166124 A EP 16166124A EP 3236081 B1 EP3236081 B1 EP 3236081B1
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EP
European Patent Office
Prior art keywords
profile
blade
section
free end
end region
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.)
Active
Application number
EP16166124.4A
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German (de)
English (en)
French (fr)
Other versions
EP3236081A1 (de
Inventor
Matthias Wolf
Ralf Klinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Punker GmbH
Original Assignee
Punker GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Punker GmbH filed Critical Punker GmbH
Priority to EP16166124.4A priority Critical patent/EP3236081B1/de
Priority to ES16166124T priority patent/ES2856054T3/es
Priority to PL16166124T priority patent/PL3236081T3/pl
Priority to US15/473,087 priority patent/US20170306974A1/en
Priority to CN201710261973.4A priority patent/CN107401525B/zh
Publication of EP3236081A1 publication Critical patent/EP3236081A1/de
Application granted granted Critical
Publication of EP3236081B1 publication Critical patent/EP3236081B1/de
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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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30—Vanes
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
    • 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
    • F05D2230/00—Manufacture
    • F05D2230/20—Manufacture essentially without removing material
    • F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
    • 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
    • F05D2230/00—Manufacture
    • F05D2230/50—Building or constructing in particular ways
    • F05D2230/54—Building or constructing in particular ways by sheet metal manufacturing

Definitions

  • the invention relates to a profile blade for a fan wheel, with a profile body made from at least one bent sheet metal strip.
  • the invention also relates to a fan wheel with such a profile blade.
  • profile blades for fan wheels are produced in a cost-effective manner in that an elongated sheet metal strip is bent over at least in a bending area transversely to a longest edge.
  • a bending device can be used for this bending process, with the aid of which a profile nose is created in the bending area.
  • a U-shaped profile is created temporarily, which is converted into a teardrop-shaped profile by continuing the bending process. This teardrop-shaped profiling represents the final state of the bending process.
  • a material-locking and / or form-locking connection of the adjacent end region edges of the sheet metal strip can be provided in order to produce a stable profile blade.
  • a fan wheel is known in which a plurality of blades are arranged between a circular blank and a ring, the blades each being formed from several sheet metal parts connected to one another in some areas by riveting or welding, which are also connected to the circular blank and the ring by rivets .
  • the JP 60-198398 A discloses a profile blade for a fan wheel formed from several sheet metal strips welded together, this profile blade being made from a bleaching strip which determines the blade geometry and several reinforcing ribs arranged in the interior of the blade in the form of a web, which are also formed from sheet metal strips.
  • a profile blade for a fan wheel which is formed from a first, a profile upper side of the profile blade determining cover plate and a plurality of each angled formed support plates, the support plates form both a profile underside and reinforcing ribs for the profile blade and each with adjacently arranged support plates and are welded to the cover plate.
  • the DE 326 041 C discloses a blade for a centrifugal fan, which is formed from a single sheet metal strip which is placed around two spaced stud bolts to form the blade, the free end regions of the sheet metal strip being riveted in a central area between the stud bolts to a central section of the sheet metal strip.
  • the object of the invention is to provide a profile blade and a fan wheel with profile blades of this type which have improved rigidity for the profile blades.
  • the at least one connection zone which is required when the profile blade is designed from at least one or more sheet metal strips to connect end regions of the sheet metal strip or sheet metal strips to one another, can be made up of the zones of the profile blade that are heavily loaded with regard to the forces that occur less heavily used zones are laid.
  • profile blades can be provided which, in addition to an aerodynamically favorable profile, in particular with a different profile for a pressure side and a suction side of the profile blade, also ensure process-reliable manufacture and high fatigue strength. While the upper profile part is always convex in shape, the lower profile part can be profiled flat or concave or convex depending on the application.
  • the profiling of the profile body is always designed as a closed ring, preferably with a continuous curve. Due to the angling of the at least one end area and the arrangement of the angled section of this end area between the upper profile part and the lower profile part, an advantageous connection zone for the material connection of the profile sections can be created. In particular, welding processes, soldering processes or gluing processes come into consideration as processes for the integral connection of the profile sections.
  • a free end area of at least one profile section is angled with respect to the profile upper part and the profile lower part and is arranged between the profile upper part and the profile lower part.
  • a free end region of a profile section lies flat against a strip-shaped contact surface of another profile section, which is offset from a surface of the profile body.
  • the contact surface on the angled section is used to form a soldering gap or adhesive gap with a large contact area between the two profile sections and thus to create a heavy-duty mechanical connection.
  • the contact surface is aligned parallel to the surface of the profile body. This creates a homogeneous (welded or soldered or glued) gap between the two profile sections, which is particularly advantageous for a reliable mechanical coupling between the two profile sections when a soldering process or an adhesive process is used.
  • the end area of the end area resting on the contact surface and the section of the end area which defines the contact surface serve as a doubling of the sheet metal material.
  • the contact surface is curved in the same way as the associated surface of the profile body in order to ensure a gap width that is as constant as possible both in a longitudinal direction and in a transverse direction of the gap.
  • the angled free end region of the at least one profile section connects the profile upper part with the profile lower part.
  • the angled free end area has the function of a reinforcing strut, which reinforces the profile upper part with respect to the profile lower part and thereby stabilizes it, in particular with respect to bending moments acting on the profile blade.
  • the angled free end region of the at least one profile section is preferably designed in such a way that it connects the upper profile part to the lower profile part in an area at a maximum distance from the lower profile part, whereby a particularly advantageous reinforcement effect for the profile blade can be achieved.
  • the same material connection method is preferably used as for the connection of the two profile sections. It is provided, for example, that both material connections are created by welding, in particular spot welding. Alternatively, a different connection method can be used, which may be tailored to the connection method for the two profile sections. Purely by way of example, when a welding process is used for the two profile sections, the use of a thermally hardening adhesive process can be provided for the integral connection between the angled free end area of the profile section and the opposite profile upper part or profile lower part. In this case, the activation of the adhesive used here takes place through the introduction of heat when the welding process is carried out.
  • the profile lower part is designed with a concave curve and / or that the profile lower part has at least two profile sections.
  • a corresponding profile blade has an aerodynamically favorable profile when used in a fan wheel.
  • the connection zone between the two profile sections is thus located in a mechanically lightly loaded area of the profile blade.
  • At least one of the free end regions is additionally connected to the profile lower part or the profile upper part or to a profile element in a materially bonded manner.
  • the profile body is formed from exactly one sheet metal strip.
  • the number of connection zones is kept to a minimum, whereby the production costs for the profile blade can also be kept at a low level. Furthermore, this ensures an advantageous flow of force within the profile blade that is not disturbed by a plurality of connection zones, so that from this point of view, too, a material- and thus weight-saving design of the profile blade can be achieved.
  • both profile sections of the upper profile part or of the lower profile part have a free end area which is angled relative to the upper profile part and the lower profile part and which extends between the upper profile part and the lower profile part.
  • both free end areas of the profile sections can be used as reinforcement struts with respect to the respective opposite profile upper part or profile lower part, whereby a particularly heavy-duty geometry of the profile blade can be achieved.
  • both end areas extend at an acute angle to each other in the direction of the opposite profile upper part or profile lower part, starting from a separating joint between the two profile sections, at which a material connection of the two profile sections is created, in particular by welding.
  • a gap in particular in the form of a groove, is formed between the two angled end regions, which gap determines the course of the surfaces of the upper or lower profile part even after the material connections have been made.
  • each of the angled free end regions of the profile sections has a strip-shaped contact surface offset from a surface of the profile body and that a profile element connects adjacent contact surfaces and regionally defines the surface of the profile body.
  • the task of the profile element is therefore to cover the, in particular groove-shaped, gap between the angled end regions of the profile sections and thus to ensure an at least largely smooth surface for the upper or lower profile part.
  • an envelope curve around the profile body has a largely teardrop-shaped, in particular curvature-constant, course.
  • the profile element is preferably designed as a sheet metal strip and is arranged flush with the surfaces of the profile sections on the contact surface and is connected to the profile sections in a materially bonded manner.
  • the object of the invention is achieved for a fan wheel for conveying a gaseous fluid with the features of claim 9.
  • the fan wheel comprises a disc-shaped round, which is formed coaxially to an axis of rotation and has a hub arrangement, as well as a ring arranged coaxially to the axis of rotation and at a distance from the round, and a plurality of profile blades according to one of claims 1 arranged at a predeterminable angular division in an annular volume around the axis of rotation to 8, which are fixed with axial, opposite end faces on the blank and on the ring.
  • a profile blade which is designed in particular according to one of claims 1 to 5, can be produced using a method with the following steps: providing a sheet metal strip to a forming device, reshaping the sheet metal strip to form a convexly curved upper profile part, a lower profile part arranged at a distance from the upper profile part and a first and a second profile nose which connect the upper profile part to the lower profile part, so that two profile sections are formed on the upper profile part and / or the lower profile part, a first profile section being connected to the first profile nose and a second profile section being connected to the second Profile nose is connected and wherein a free end region of at least one profile section opposite the The upper profile part and the lower profile part is angled and is arranged between the upper profile part and the lower profile part, as well as material-locking fixing of at least one section of the end region on an adjacent section of the upper profile part and / or the lower profile part.
  • profile blades 1, 41, 81, 121, 161, 201, 241, 281, 321, 361, 401 are used for functionally identical structures. A description of the respective structures occurs only once. First, an explanation is given in FIG Figure 1 Profile blade 1 shown in more detail, based on which the basic components of the other in the Figures 2 to 5 and profile blades 41, 81, 121, 161, 201, 241, 281, 321, 361, 401 shown in FIGS. 7 to 14 are shown.
  • the profile blade 1 shown is produced purely by way of example from a rectangular sheet metal strip 2.
  • the sheet metal strip 2 has two longest edges 3, 4, which determine a profile, for example drop-like or kidney-like, of the profile blade 1 designed as a profile body 7, as well as two end region edges 5, 6.
  • the longest edges 3, 4 are each arranged, for example, in planes parallel to one another, which are aligned at right angles to planes in which the end region edges 5, 6 are arranged.
  • the sheet metal strip 2 can be produced, for example, as a section of a strip material, not shown, or as a section from a not shown, in particular flat, sheet metal sheet.
  • the sheet metal strip 2 in each case at a distance from the respective end region edge 5, 6, which corresponds to approximately 25 percent of the respective total length of the two longest edges 3, 4, in opposite directions and at right angles to the two longest edges 3, 4 exemplary different bending radii, which are considerably greater than a material thickness of the sheet metal strip 2, was bent.
  • This forming process forms a profile body 7 which, purely by way of example, has a constant profile along a profile axis 8.
  • the profile body 7 in the Figure 1 The profile blade 1 shown comprises, purely by way of example, a concavely curved one Upper profile part 9, a convexly curved lower profile part 10 and two profile lugs 11, 12, each of which is convex, which, for example, connect the upper profile part 9 in one piece with the lower profile part 10.
  • a first profile nose 11 forms a front edge 15 of the profile blade 1, while a second profile nose 12 forms a rear edge 16 of the profile blade 1.
  • the profile blade 1 it is provided for the profile blade 1 that the profile upper part 9 is formed from two profile sections 17, 18, with a first profile section 17 extending between the first end region edge 5 and the first profile nose 11, while a second profile section 18 between the second end region edge 6 and the second profile nose 12 is extended.
  • a surface 19 of the upper profile part 9 is defined by an upper side 20 of the first profile section 17 and by an upper side 21 of the second profile section 18 and that an end area 22 of the first profile section 17, which can also be referred to as the first end area 22, rests on the second profile section 18 in the manner described in more detail below.
  • the end area is provided with two at least substantially right-angled and opposing bevels 24, 25 in order to form a strip-shaped contact surface 26 that is offset from a surface 19 of the profile body 7 and parallel to the Surface 20 of the first profile section 17 by the material thickness of the sheet metal strip 2 is arranged offset.
  • the end region 23 extends after a further at least substantially right-angled fold 27 normal to a concave inner surface 28 of the profile lower part 10 and is bent over again at right angles at the end with a fold 31.
  • This forms a contact surface 29 which is aligned parallel to the inner surface 28 and which can be used for a material connection with the inner surface 28.
  • the two profile sections 17, 18 are welded to one another in the region of a separating joint 30 on the surface 19 in a manner not shown in detail.
  • the contact surface 29 can also be made for the contact surface 29 to be materially connected to the inner surface 28 using a liquid adhesive.
  • the two profile sections 17, 18 can also be soldered, exclusively welded or exclusively glued.
  • the illustrated second embodiment of a profile blade 41 are both end regions 62, 63 of the profile sections 57, 58, starting from a respective top side 60, 61, which determine the surface 59 of the profile upper part 49 of the profile blade 41, bent at an acute angle to the respective top side 60, 61.
  • the two end regions 62, 63 in the interior 54 of the profile blade 41 run obliquely to the inner surface 68 of the lower profile part 50.
  • both end regions 62, 63 are each provided near the end region edge 45, 46 with a bevel 71, 72 to each other to form contact surface 69 aligned parallel to inner surface 68, which can be connected to inner surface 68 in a materially bonded manner.
  • Profile sections 57, 58 form a parting line 70, which can be closed by welding, for example. In the course of this welding process, a material connection of the two profile sections 57, 58 can also be established.
  • the illustrated third embodiment of a profile blade 81 are both profile sections 97, 98 like the second profile section 18 according to the FIG Figure 1 formed profile blade 1 shown and arranged in opposite directions spaced from one another.
  • Each of the end regions 102, 103 of the profile sections 97, 98 thus has a sequence of bevels 104, 105, 107, 111 in opposite directions.
  • the profile lower part 90 is divided into the two profile sections 97, 98, so that the respective end regions 102, 103 extend from the profile lower part 90 to the profile upper part 89 and there with contact surfaces 109 on an inner surface 113 of the profile upper part 89 are firmly established.
  • Each of the end regions 102 has a strip-shaped contact surface 106, which is aligned offset parallel to the respective top side 100, 101 of the profile sections 97, 98 and is at a distance from the respective top side 100, 101 that corresponds, for example, to a material thickness of the sheet metal strip 82. Due to the spacing of the two end regions 102, 103, a gap 115 is formed between the two strip-shaped contact surfaces 106 of the end regions 102, 103. This gap 115 is unfavorable from an aerodynamic point of view and also has negative effects on the dimensional stability of the profile blade 81.
  • the gap 115 is covered by a profile element 114, which is embodied purely in the form of a plate, and is firmly bonded to the two contact surfaces 106 of the two end regions 102, 103 is attached. This measure creates a two-part profile blade 81 with high strength.
  • the profile blade 121 shown is a variant of the profile blade 81 and differs only in the design of the profile element 154. This differs from that in FIG Figure 3
  • the profile element 114 shown is not plate-shaped with a slightly concave curvature, but rather has a central web 156 which is formed by deformation and is aligned parallel to the profile axis 128, which extends from an underside 157 of the profile element 154 in the direction of the inner surface 151 of the upper profile part 129 and is cohesive this inner surface 151 is fixed and thereby enables an additional stabilization of the profile blade 121.
  • a fan wheel 560 is shown purely by way of example with a fitting with profile blades 1.
  • a fan wheel 560 is used for conveying a gaseous fluid and, purely by way of example, comprises a plurality of blades 1 which are arranged in a predeterminable angular division in an annular volume around an axis of rotation 92.
  • the blades 1 are each fixed with their axial, mutually opposite end regions on carrier means 563, 564.
  • a first carrier means is designed as a disk-shaped round blank 563 coaxially to the axis of rotation 562 and comprises a hub arrangement 565.
  • a second carrier means is designed as a ring 564 coaxially to the axis of rotation 562. It is provided that the profile blades 1 are each arranged with the first profile nose 11 radially on the inside are, while the second profile nose 12 is arranged radially outward.
  • a high-strength and cost-effective fan wheel 560 is realized in cooperation with the disc-shaped round plate 563 and the ring 564.
  • the ones in the Figures 7 to 14 The profile blades 161, 201, 241, 281, 321, 361, 401 and 441 shown can be divided into two groups.
  • the profile blades 161, 201, 241 form a first group, while the profile blades 281, 321, 361, 401, 441 form a second group.
  • the profile upper parts 169, 209, 249 and the profile lower parts 170, 210, 250 of the respective profile body 167, 207, 247 each in profile sections 177, 217, 257 and 178, 218 , 258 are subdivided and end regions 182, 222, 262 and 183, 223, 263 are each arranged opposite one another at the end and are connected to one another in a materially bonded manner.
  • a profile element 194, 234, 274 is arranged that is materially connected to facing inner surfaces of the end regions 182, 222, 262 and 183, 223, 263.
  • the profile element 194 is S-shaped.
  • the profile element 234 is designed in the manner of a double T-beam.
  • the profile element 274 as a variant of the profile element 234 according to FIG Figure 8 and has an outer web 275 on opposite surfaces, by means of which the end regions 262, 263 resting on the profile element 274 are spaced from one another.
  • the profile blades 281, 321, 361, 401, 441 of the second group can be viewed as variants or further developments of the profile blades 1, 41, 81, 121, whereby, in accordance with the profile blades 161, 201, 241 according to the first group, both the Upper profile parts 289, 329, 369, 409, 449 and lower profile parts 290, 330, 370, 410, 450 are divided into profile sections 297, 337, 377, 417, 457 and 298, 338, 378, 418, 458.
  • At least one of the end regions 302, 342, 382, 422, 462 and 303, 343, 383, 423, 463 is in each case in the profile blades 281, 321, 361, 401, 441 Profiled way that it can serve as a contact surface for an oppositely arranged end area.
  • both end regions 343 of the profile upper part 329 and of the profile lower part 330 are each double folded in opposite directions and thus form contact surfaces for the two end regions 342 of the upper profile part 329 and the lower profile part 330.
  • the profile blade 361 In the case of the profile blade 361, the end area 382 of the profile section 377 of the profile upper part 369 rests against a contact surface of the beveled end area 383 of the profile section 378. Furthermore, the end region 383 of the profile section 378 of the profile lower part 370 rests against a contact surface of the beveled profile section 377 of the profile lower part 370. Accordingly, the profile blade 361 has two reinforcing struts between the profile upper part 369 and the profile lower part 370.
  • the end areas 423 of the upper profile part 409 and of the lower profile part 410 each form contact surfaces for the support of the end areas 422 of the upper profile part 409 and the lower profile part 410.
  • the end areas 423 are additionally bent in such a way that the end area 423 of the upper profile part 409 is arranged at the end opposite to the end area 423 of the lower profile part 410, whereby an unspecified gap is formed which can be materially connected before the end regions 422 of the upper profile part 409 and the lower profile part 410 are materially connected to the contact surfaces.
  • the profile blade 441 is a variant of the profile blade 401 in which the end area 463 of the profile upper part 409 forms a contact surface for the end areas 462 of the profile upper part 449 and the profile lower part 450 as well as for the end area 463 of the profile lower part 450.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP16166124.4A 2016-04-20 2016-04-20 Aus gebogenem blech hergestellte radialgebläse-schaufel mit einem naht auf der druck- oder saugseite Active EP3236081B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP16166124.4A EP3236081B1 (de) 2016-04-20 2016-04-20 Aus gebogenem blech hergestellte radialgebläse-schaufel mit einem naht auf der druck- oder saugseite
ES16166124T ES2856054T3 (es) 2016-04-20 2016-04-20 Alabe de ventilador centrífugo fabricado de chapa flexionada, con una soldadura en el lado de presión o succión
PL16166124T PL3236081T3 (pl) 2016-04-20 2016-04-20 Łopatka dmuchawy promieniowej, wykonana z wygiętej blachy ze szwem po stronie tłoczenia lub po stronie ssania
US15/473,087 US20170306974A1 (en) 2016-04-20 2017-03-29 Profiled Blade and Fan Impeller
CN201710261973.4A CN107401525B (zh) 2016-04-20 2017-04-20 成型叶片和风扇叶轮

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16166124.4A EP3236081B1 (de) 2016-04-20 2016-04-20 Aus gebogenem blech hergestellte radialgebläse-schaufel mit einem naht auf der druck- oder saugseite

Publications (2)

Publication Number Publication Date
EP3236081A1 EP3236081A1 (de) 2017-10-25
EP3236081B1 true EP3236081B1 (de) 2021-01-06

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EP16166124.4A Active EP3236081B1 (de) 2016-04-20 2016-04-20 Aus gebogenem blech hergestellte radialgebläse-schaufel mit einem naht auf der druck- oder saugseite

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US (1) US20170306974A1 (pl)
EP (1) EP3236081B1 (pl)
CN (1) CN107401525B (pl)
ES (1) ES2856054T3 (pl)
PL (1) PL3236081T3 (pl)

Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
CN108534202A (zh) * 2018-06-14 2018-09-14 杭州老板电器股份有限公司 叶轮、风机及油烟机
CN109973430B (zh) * 2019-05-08 2021-10-26 泛仕达机电股份有限公司 一种组合式中空机翼叶片

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7403245U (de) * 1974-04-18 Wilhelm Gebhardt Kg Aus einem Hohlprofil bestehende Schaufel für ein Gebläselaufrad

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ES2856054T3 (es) 2021-09-27
EP3236081A1 (de) 2017-10-25

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