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
  • F04D29/40—Casings; Connections of working fluid
  • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
  • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
  • F04D29/4226—Fan casings
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D25/00—Pumping installations or systems
  • F04D25/02—Units comprising pumps and their driving means
  • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
  • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
• • 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
  • F04D29/60—Mounting; Assembling; Disassembling
  • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
  • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
  • F04D29/626—Mounting or removal of fans
• • 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
  • F05D2230/60—Assembly methods
  • F05D2230/61—Assembly methods using limited numbers of standard modules which can be adapted by machining

Definitions

• the present invention relates to a kit of parts for the manufacture of a radial fan and its use.
• a radial fan typically has a housing with a chamber in which a fan wheel rotates about an axis, an inlet opening adjacent the axis, and an outlet opening located at the periphery of the chamber.
• the relationship between the speed of the fan wheel, pressure difference between the inlet and outlet ports and the flow rate depends on the geometry of the fan wheel and the receiving chamber and a characteristic of each fan model. The requirements for this connection vary depending on the application for which the radial fan is intended. If a fan is used, for example, for cooling purposes, then its volume flow should vary as little as possible with the pressure difference in order to ensure a sufficient flow of cooling air even under unfavorable conditions, e.g. in a restricted cross-section of the cooling air path, to be able to maintain.
• a ventilator is used to ventilate a patient, then a strong dependence of the volume flow on the pressure difference is desirable in order to be able to provide a high volume flow when the patient inhales, but not to hinder his exhalation by a high back pressure ,
• the aim of the present invention is to provide a set of parts and a method with which fans can be provided inexpensively with each adapted for a particular application relationship between pressure difference and flow.
• the object is achieved on the one hand by at least one part set for a radial fan next to a fan, a base housing part and a first complementary housing part, which are joined together to form a first housing surrounding the fan, an inlet opening and an outlet opening second complementary housing part comprises, whose shape differs from that of the first complementary housing part, and which is connectable instead of the first complementary housing part with the base housing part to form a second housing.
• the complementary housing part is optimized in each case specifically with regard to a desired relationship between pressure and volume flow and is required in several versions in order to be able to represent different relationships
• the basic housing part preferably also the fan wheel
• the non-application-specific parts can be provided cost-effectively in large numbers, but also because the application-specific complementary housing parts make up only a small part of the entire housing and therefore with small-format, relatively simple and therefore cost-effective Tools can be manufactured.
• the basic housing part in particular then at most has a small influence on the relationship between pressure and volume throughput, when a base plate of the fan wheel is arranged on its side facing the base housing part and thus the basic housing part is largely shielded from the air circulation in the interior of the housing.
• the inlet opening should be provided in the complementary housing parts, on the one hand, because it may be necessary to vary the dimensions of the inlet opening to vary the relationship between pressure and volume flow, and this is possible only on the side of the complementary housing part, on the other hand she can not be blocked by the base plate there.
• the outlet should be variable by selecting a complementary housing part and therefore limited at least in part by the complementary housing part; since the outlet is generally remote from the axis, it is preferably limited both by the base housing part and by the complementary housing part joined to the base housing part.
• such different outlets can be realized by virtue of the fact that the complementary housing parts differ in the cross section of a wall area which delimits a blast air duct surrounding the fan wheel.
• the complementary housing parts should differ in the course of a wall delimiting the outlet.
• the complementary housing parts differ in each case through the cross section of a wall region (28, 40 ', 40 ") which delimits a blast air duct (32) surrounding the fan wheel (2).
• the wall area can be provided on its outside with stiffening ribs.
• Interfaces for attachment to the base housing part should be identical for all complementary housing parts. These interfaces may include, for example, mating flanges or interlocking tongue-and-groove joints for tight contact between the base shell and the complementary shell or cooperating attachment means for anchoring the complementary shell to the base shell.
• the fan is preferably mounted on the base housing part.
• installation space for a fan motor driving motor is provided on the base housing part.
• the object is further achieved by a method for manufacturing a radial fan with the steps:
• FIG. 1 shows an exploded view of a basic housing part 1, a fan wheel 2 and a complementary housing part 3 of a radial fan.
• the sectional plane of FIG. 1 runs along a rotation axis 4 of the fan wheel 2.
• the base housing part 1 comprises a bottom plate 5, an outer wall 6 and an elastic buffer ring 7, via which the bottom plate 5 is connected to the outer wall 6 to form an outer cup.
• An electric motor 9 is accommodated concentrically in the outer cup, forming an annular circulating cooling air channel 8, and enclosed by an intermediate wall 11 supported on a shoulder 10 of the outer wall 6.
• the electric motor 9 comprises a shaft 12, a rotor 13, a stator 14, a printed circuit board 15, which carries an inverter for supplying the stator 14, and a housing, which comprises said components 12-15.
• the housing comprises an inner cup 16 and a cover 17 closing the inner cup 16, through the central opening of which the shaft 12 protrudes.
• the intermediate wall 1 1 and the lid 17 exposed in an opening of the intermediate wall form a central plateau 18 around the axis of rotation 4.
• a peripheral region of the intermediate wall 11 surrounding the plateau 18 springs back into the interior of the outer cup and defines, together with the outer wall 6, a channel 19, which extends with gradually increasing cross-section around the axis of rotation 4.
• the fan wheel 2 has a transverse to the axis of rotation 4 oriented base plate 20, whose diameter is not greater than that of the plateau 18 and the plateau 18 in the assembled state is opposite to each other. At the side facing away from the plateau 18 side of the base plate 20 are air blades 21 in the axial direction.
• the basic housing part 1 in plan view and the mounted on the shaft 12 fan 2 can be seen in a radial section. It can be clearly seen the channel 19, which, starting from a starting point 22 gradually becomes wider, extending counterclockwise around the fan 2 and merges into a tangent to the circumference of the fan 2 branching outlet 23.
• the intermediate wall 1 1 has one or more openings 24 through which the channel 19 communicates with the cooling air channel 8 in the vicinity of the starting point 22. These openings 24 are hidden in Fig. 2 by the fan 2 and therefore shown with dashed lines. Another passage 25 between the channel 19 and the cooling air channel 8 is located at the outlet 23.
• the rotation of the fan wheel 2 generates a higher pressure in front of the passage 25 than at the openings 24, so that air enters the cooling air passage 8 via the passage 25, where waste heat from the engine 9 rises. takes and on the openings 24 the cooling air duct 8 leaves again.
• a radial wall 26 between the motor 9 and the outer wall 6 passes through the cooling air channel 8 and forces the sucked air to almost completely surround the motor 9 on the way from the passage 25 to the openings 24.
• the complementary housing part 3 of Fig. 1 can also be seen in Fig. 3 in three views and a radial section. It has an end wall 28 which extends around an inlet opening 27 about the axis of rotation 4 and whose funnel-shaped inner surface 29 in the assembled state faces edges 30 of the air blades 21 at a small distance.
• this funnel-shaped inner surface 29 extends radially beyond the edge of the base plate 20 and meets an inner side of the outer wall 6.
• the end wall 28 thus limited in the fully assembled fan on the one hand a wheel chamber 31, in which the fan 2 rotates, as well as, together with the groove 19, extending around the wheel chamber 31 around Blasluftkanal 32 in which the rotation of the fan 2 generates an overpressure.
• stiffening ribs 33 are formed.
• annular flange 34 Around the inner surface 29 extends perpendicular to the axis of rotation 4, an annular flange 34. He is opposed to a flange 35 at an upper edge of the outer wall 6. Both flanges 34, 35 each have an annular groove 36. A in the mounted state in both annular grooves 36 engaging sealing ring 37 seals the blast air duct 32 radially outward.
• projecting bracket 38 are distributed over the flange 34. These are intended to engage in the assembly of the housing on projections 39 (see Fig. 2) the outer wall 6 of the base housing part 1 to be snapped and so the housing parts 1, 2 permanently connect to each other.
• Fig. 4 shows a second complementary housing part 3 'in Fig. 3 analog views.
• this housing part 3 ' the diameter of the inlet opening 27' in comparison to the housing part 3 is reduced.
• the diameter of the inner surface 29 ' is reduced compared to Fig. 3, so that it is opposite only to the fan 2 and between it and the flange 34 to a groove 19 of the base housing part 1 mirror image groove 40' place.
• the flange 34 and the bracket 38 distributed thereon are identical in shape with those of the housing part 3, so that either one or the other can be added to the basic housing part 1.
• a significantly larger cross section of the blown air channel 26 results.
• the cross-sectional profile of the inner surface 29 ' corresponds to that of the inner area 29 of the inner surface 29 opposite the fan wheel 2, so that both complementary housing parts 3, 3' can also be combined with the same fan wheel 2. It is thus possible to pre-assemble the basic housing part 1, the motor 9 and the fan wheel 2 to form an assembly whose aerodynamic properties are determined later by adding the complementary housing part 3 or 3 '.
• the strong curvature in the region of the groove 40 ' gives the end wall 28' a relatively high rigidity, so that the ribs shown on the housing part 3 in FIG. 3 can be omitted here or can be significantly reduced in their height.
• the housing part 3 ' is due to the small inlet cross section and relatively spacious blast air duct suitable for applications where it depends on a low flow noise.
• a further complementary housing part 3 " is shown in Fig. 5. Its end wall 28" has, like that of the housing part 3 ', a circumferential groove 40 ", the inlet opening 27" being larger than that of the housing parts 3, 3'.
• This complementary housing part 3 " is not as quiet as the housing part 3 ', but allows higher air flow rates and is therefore particularly suitable for efficient cooling of equipment used in production halls or other per se noisy environments.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (1)

Family

ID=62816514

Family Applications (1)

Country Status (10)

Cited By (1)

Citations (2)

Family Cites Families (5)

• 2017
  • 2017-07-21 DE DE102017006854.2A patent/DE102017006854A1/de active Pending
• 2018
  • 2018-06-26 DE DE202018103634.3U patent/DE202018103634U1/de active Active
  • 2018-06-26 DK DK18737185.1T patent/DK3655662T3/da active
  • 2018-06-26 EP EP18737185.1A patent/EP3655662B1/de active Active
  • 2018-06-26 WO PCT/EP2018/067157 patent/WO2019015924A1/de unknown
  • 2018-06-26 SI SI201830636T patent/SI3655662T1/sl unknown
  • 2018-06-26 PT PT187371851T patent/PT3655662T/pt unknown
  • 2018-06-26 LT LTEPPCT/EP2018/067157T patent/LT3655662T/lt unknown
  • 2018-06-26 PL PL18737185T patent/PL3655662T3/pl unknown
  • 2018-06-26 ES ES18737185T patent/ES2910188T3/es active Active
  • 2018-07-17 CN CN201821129740.5U patent/CN209180120U/zh active Active

Patent Citations (2)

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