EP2422095A1 - Apparatus for the construction of fan wheels of the double suction type - Google Patents

Apparatus for the construction of fan wheels of the double suction type

Info

Publication number
EP2422095A1
EP2422095A1 EP10727977A EP10727977A EP2422095A1 EP 2422095 A1 EP2422095 A1 EP 2422095A1 EP 10727977 A EP10727977 A EP 10727977A EP 10727977 A EP10727977 A EP 10727977A EP 2422095 A1 EP2422095 A1 EP 2422095A1
Authority
EP
European Patent Office
Prior art keywords
end rings
central disk
rolling
flanging
assembly mandrel
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
Application number
EP10727977A
Other languages
German (de)
French (fr)
Other versions
EP2422095B1 (en
Inventor
Franco Collu
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.)
Regal Beloit Italy SpA
Original Assignee
Nicotra Gebhardt SpA
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 Nicotra Gebhardt SpA filed Critical Nicotra Gebhardt SpA
Publication of EP2422095A1 publication Critical patent/EP2422095A1/en
Application granted granted Critical
Publication of EP2422095B1 publication Critical patent/EP2422095B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/26—Making other particular articles wheels or the like
    • B21D53/267—Making other particular articles wheels or the like blower wheels, i.e. wheels provided with fan elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • F04D17/162—Double suction 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
    • F04D29/60—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

Definitions

  • the present invention generally relates to the technical field of industrial fans, and in particular concerns an apparatus for the construction of fan wheels of the double suction type.
  • a fan wheel of the type mentioned above is essentially formed by two arrays of inclined blades arranged on a cylindrical surface, a pair of blade restraining end rings, and at least one central disk supporting the blades and carrying the fan wheel hub.
  • the fan blades are fastened through a positive locking and non- positive connection to the central disk and to the end rings by shaping the blade ends and securing them with a rolling and flanging operation into suitable grooves or slots of the central disk and of the end rings.
  • the construction method of fan wheels of the type mentioned previously, at present, requires many operations to be performed which, on the one side, concur to complicate the production cycle, and on the other increase the costs of the finished product.
  • the known construction method consists of the separate assembling of the two arrays of blades and the subsequent joining of the preassembled array of blades to form a unitary double suction fan wheel.
  • This construction method has the drawback of being relatively long, complicated and expensive to perform; furthermore, it does not lend itself easily to the production of a fan wheel having high structural stiffness.
  • an object of the present invention is to provide an apparatus for the construction of fan wheels of the double suction type as previously described which allows the blade ends to be fastened to the central disk and to the end rings in a single assembling operation, thus without requiring the separate assembling of the two arrays of blades and the subsequent joining of the array of blades to form the fan wheel.
  • Another object of the present invention is to provide an apparatus allowing the mass production of fan wheels as mentioned above, requiring only a minimum number of assembly operations and permitting fan wheels, also large in size and having high structural stiffness, to be constructed with only a minimum use of labour and in the most inexpensive and simple manner as possible.
  • a further object of the present invention is to achieve a particularly suitable positive locking and non-positive connection of the fan blades to the central disk and to the end rings, which can prevent deformation of the fan wheel even at high peripheral speeds. Disclosure of the invention
  • an apparatus for the construction of fan wheels of the double suction type comprising a plurality of inclined blades arranged on a cylindrical surface, a pair of blade restraining end rings and at least one central disk supporting the blades and carrying the fan wheel hub, characterised in that said apparatus comprises an assembly mandrel formed of two cylindrical components displaceable one relative to the other and operable to rotate about a common axis, and a pair of circular plates slidably mounted on the ends of the assembly mandrel, said assembly mandrel carrying seats adapted for supporting and holding in position the end rings and the central disk, and said cylindrical components of the assembly mandrel being provided with retaining means, arranged on the lateral surface thereof, for temporary holding in position the blades of the fan wheel during the construction operations thereof, and in that rolling and flanging devices are mounted near said seats of the end rings and the central disk on the assembly mandrel for rolling and flanging said end rings and said central disk
  • FIG. 1 is a perspective view of the overall structure of a fan wheel made with an apparatus according to the invention.
  • - Figure 2 is a front elevational view of the fan wheel of Figure 1.
  • FIG. 3 is a sectional view of the fan wheel taken along line HI-III of Figure 2.
  • FIG. 4 is an enlarged view of the detail A of Figure 3.
  • FIG. 5 is an enlarged view of the detail A of Figure 3 showing the blades of the fan wheel during the phase of positioning the same on the central disk of the fan wheel.
  • FIG. 7 is an enlarged view of the detail B of Figure 3 showing the blades of the fan wheel during the phase of positioning the same on the end rings of the fan wheel.
  • FIG. 8 is a perspective partial view of an apparatus according to the invention for the construction of the fan wheel of Figure 1.
  • - Figure 9 is a longitudinal cross-sectional view of the apparatus of Figure 8 shown in the configuration at the beginning of the production cycle of the fan wheel of Figure 1.
  • FIG. 10 is a longitudinal cross-sectional view of the apparatus of Figure 8 shown at the end of the phase of approaching of the cylindrical components of the assembly mandrel.
  • - Figure 11 is an enlarged view of the detail A of Figure 10 showing the positioning of a first end of the blades into the peripheral edge of the central disk.
  • - Figure 12 is an enlarged view of the detail B of Figure 10 showing the positioning of a second end of the blades into the end rings.
  • FIG. 13 is a longitudinal cross-sectional view of the apparatus of Figure 8 shown during the first phase of the operation of rolling the end rings and the central disk on the blade ends.
  • - Figure 14 is an enlarged view of the detail A of Figure 13 showing the first phase of the operation of rolling the central disk on a first end of the blades.
  • FIG. 15 is an enlarged view of the detail B of Figure 13 showing the first phase of the operation of rolling the end rings on a second end of the blades.
  • FIG. 16 is a longitudinal cross-sectional view of the apparatus of Figure 8 showing a second phase of the operation of rolling the end rings and the central disk on the blade ends.
  • - Figure 17 is an enlarged view of the detail A of Figure 16 showing the second phase of the operation of rolling the central disk on a first end of the blades.
  • FIG. 18 is an enlarged view of the detail B of Figure 16 showing the second phase of the operation of rolling the end rings on a second end of the blades.
  • - Figure 19 is a longitudinal cross-sectional view of the apparatus of Figure 8 shown during the operation of flanging the end rings and the central disk on the blade ends.
  • - Figure 20 is an enlarged view of the detail A of Figure 19 showing the operation of flanging the central disk on a first end of the blades.
  • FIG. 21 is an enlarged view of the detail B of Figure 19 showing the operation of flanging the end rings on a second end of the blades.
  • the proposed embodiment of the fan wheel of the double suction type consists essentially of a plurality of blades 10 of suitable shape having at their axial end bases or feet 11 which are adapted to be arranged along a circumference and are in contact one with the other for determining the desired pitch between the blades 10.
  • These blades, together with the relevant feet, can be obtained in a known manner by sheet blanking.
  • the structure of the fan wheel is formed of two groups or arrays 12 of blades, arranged side by side, and each consisting of a predetermined number of blades 10 arranged to form a cylindrical surface.
  • This structure is made self-supporting by means of a pair of end rings 13, each of which being substantially U-shaped (Figure 7) in cross-section so as to form a hollow section for receiving the blade feet 11, with one side of the said U- shaped hollow section of the end rings being bent over the blade feet 11 to constrain the same ( Figure 6).
  • a central disk 14 formed of a pair of half-disks 14A and 14B, opposite each other and joined together, carrying the hub of the fan wheel and having a peripheral edge forming in cross-section a substantially U- shaped hollow section (Figure 5), similar to that of the end rings 13, for receiving the blade feet 11 opposite to those constrained by the end rings 13, one side of said U-shaped hollow section of the peripheral edge of the central disk being bent over said blade feet 11 to constrain the same ( Figure 5), similar to that of the end rings 13, for receiving the blade feet 11 opposite to those constrained by the end rings 13, one side of said U-shaped hollow section of the peripheral edge of the central disk being bent over said blade feet 11 to constrain the same (Figure 5), similar to that of the end rings 13, for receiving the blade feet 11 opposite to those constrained by the end rings 13, one side of said U-shaped hollow section of the peripheral edge of the central disk being bent over said blade feet 11 to constrain the same (Figure 5), similar to that of the end rings 13, for receiving the blade feet 11 opposite to those constrained by the end rings 13, one
  • this apparatus consists of an assembly mandrel 15 formed of two substantially symmetrical cylindrical components or drums 16 and 17, which are displaceable one relative to the other and are operable to rotate about a common axis, and a pair of circular plates 18 and 19 which are slidably mounted on the opposite ends of the assembly mandrel 15.
  • Drums 16 and 17 are provided with retaining means, e.g. of elastic or magnetic type, arranged on their lateral surface, for temporary holding in position the blades 10 of the fan wheel during the construction operations thereof.
  • Drums 16 and 17 are furthermore provided with mating coupling elements 21 and 22 which are arranged on their facing base surfaces and are adapted to establish a connection between the said drums when these are in an approached position, in order to permit an exactly congruent rotation thereof during the rolling and flanging operations of the fan wheel, as will be described in more detail in the following section in connection with the various operations for the construction of the fan wheel.
  • the assembly mandrel 15 furthermore comprises seats 23 and 24 which are adapted for supporting and holding in position the end rings 13 and the central disk 14, respectively. Proximate said seats on the end rings and the central disk, the apparatus is provided with rolling and flanging devices 25 and 26, respectively, of known type, e.g. consisting of pins and arms carrying rolling and flanging wheels, respectively, which are capable of being lowered, by action of one or more hydraulic actuators, on the end rings 13 and the central disk 14 to bend the edges thereof on the feet 11 of the blades 10.
  • the construction cycle begins with the side plates 18 and 19 being moved towards each other into an approached position, wherein the drums
  • the rolling operation generally comprises two phases. In a first phase of the roiling operation, the edges of the end rings 13 and of the central disk 14 are bent inwardly (Figs. 13 to 15). In a second phase of the rolling operation, the edges of the end rings 13 and of the central disk 14 are bent over the feet 11 of the blades 10 (Figs. 16 to 18). During or after this second phase of the rolling operation, also the flanging devices 16 are positioned on the end rings 13 and on the central diskl4 for pressing the edges thereof against the feet 11 of the blades 10 (Figs. 19 to 21).
  • the apparatus can achieve the proposed objects, and in particular it allows the blade feet to be fastened to the end rings and to the central disk in a single assembly operation.

Landscapes

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

Abstract

The apparatus comprises an assembly mandrel formed (15) of two cylindrical components (16, 17) displaceable one relative to the other and operable to rotate about a common axis, and a pair of circular plates (18, 19) slidably mounted on the ends of the assembly mandrel. The assembly mandrel carries seats adapted for supporting and holding in position the end rings and the central disk. The cylindrical components of the assembly mandrel are provided with retaining means (20), arranged on the lateral surface thereof, for temporary holding in position the blades of the fan wheel. Rolling (25) and flanging (26) devices are mounted near the seats of the end rings and of the central disk on the assembly mandrel. The cylindrical components of the assembly mandrel are axially displaceable one relative to the other between a spaced apart position for mounting the end rings and the central disk and an approached position for carrying out the rolling and flanging operations of the end rings and the central disk onto the blade ends.

Description

APPARATUSFORTHE CONSTRUCTIONOF FANWHEELSOF THEDOUBLE SUCTIONTYPE
DESCRgTION
Technical field of the invention
The present invention generally relates to the technical field of industrial fans, and in particular concerns an apparatus for the construction of fan wheels of the double suction type.
Background art
According to a conventional embodiment, a fan wheel of the type mentioned above is essentially formed by two arrays of inclined blades arranged on a cylindrical surface, a pair of blade restraining end rings, and at least one central disk supporting the blades and carrying the fan wheel hub.
The fan blades are fastened through a positive locking and non- positive connection to the central disk and to the end rings by shaping the blade ends and securing them with a rolling and flanging operation into suitable grooves or slots of the central disk and of the end rings. The construction method of fan wheels of the type mentioned previously, at present, requires many operations to be performed which, on the one side, concur to complicate the production cycle, and on the other increase the costs of the finished product. Essentially, the known construction method consists of the separate assembling of the two arrays of blades and the subsequent joining of the preassembled array of blades to form a unitary double suction fan wheel.
This construction method has the drawback of being relatively long, complicated and expensive to perform; furthermore, it does not lend itself easily to the production of a fan wheel having high structural stiffness.
This being the background art, an object of the present invention is to provide an apparatus for the construction of fan wheels of the double suction type as previously described which allows the blade ends to be fastened to the central disk and to the end rings in a single assembling operation, thus without requiring the separate assembling of the two arrays of blades and the subsequent joining of the array of blades to form the fan wheel.
Another object of the present invention is to provide an apparatus allowing the mass production of fan wheels as mentioned above, requiring only a minimum number of assembly operations and permitting fan wheels, also large in size and having high structural stiffness, to be constructed with only a minimum use of labour and in the most inexpensive and simple manner as possible. A further object of the present invention is to achieve a particularly suitable positive locking and non-positive connection of the fan blades to the central disk and to the end rings, which can prevent deformation of the fan wheel even at high peripheral speeds. Disclosure of the invention
In order to achieve the above-indicated objects, according to the invention there is provided an apparatus for the construction of fan wheels of the double suction type, comprising a plurality of inclined blades arranged on a cylindrical surface, a pair of blade restraining end rings and at least one central disk supporting the blades and carrying the fan wheel hub, characterised in that said apparatus comprises an assembly mandrel formed of two cylindrical components displaceable one relative to the other and operable to rotate about a common axis, and a pair of circular plates slidably mounted on the ends of the assembly mandrel, said assembly mandrel carrying seats adapted for supporting and holding in position the end rings and the central disk, and said cylindrical components of the assembly mandrel being provided with retaining means, arranged on the lateral surface thereof, for temporary holding in position the blades of the fan wheel during the construction operations thereof, and in that rolling and flanging devices are mounted near said seats of the end rings and the central disk on the assembly mandrel for rolling and flanging said end rings and said central disk onto the blade ends, and in that said cylindrical components of the assembly mandrel are axially displaceable one relative to the other, upon action of said circular plates, between a spaced apart position for mounting said end rings and said central disk and an approached position for carrying out the rolling and flanging operations of said end rings and said central disk onto the blade ends, and in that said cylindrical components are provided on their facing base surfaces with mating coupling elements adapted to establish a connection between the cylindrical components in their approached position, in order to permit an exactly congruent rotation thereof during the rolling and flanging operations.
Brief description of drawings
The invention will be still better understood from the following description of a preferred, although non limitative, embodiment thereof, partially and schematically shown in the accompanying drawings, wherein:
- Figure 1 is a perspective view of the overall structure of a fan wheel made with an apparatus according to the invention. - Figure 2 is a front elevational view of the fan wheel of Figure 1.
- Figure 3 is a sectional view of the fan wheel taken along line HI-III of Figure 2.
- Figure 4 is an enlarged view of the detail A of Figure 3.
- Figure 5 is an enlarged view of the detail A of Figure 3 showing the blades of the fan wheel during the phase of positioning the same on the central disk of the fan wheel.
- Figure 6 is an enlarged view of the detail B of Figure 3.
- Figure 7 is an enlarged view of the detail B of Figure 3 showing the blades of the fan wheel during the phase of positioning the same on the end rings of the fan wheel.
- Figure 8 is a perspective partial view of an apparatus according to the invention for the construction of the fan wheel of Figure 1. - Figure 9 is a longitudinal cross-sectional view of the apparatus of Figure 8 shown in the configuration at the beginning of the production cycle of the fan wheel of Figure 1.
- Figure 10 is a longitudinal cross-sectional view of the apparatus of Figure 8 shown at the end of the phase of approaching of the cylindrical components of the assembly mandrel.
- Figure 11 is an enlarged view of the detail A of Figure 10 showing the positioning of a first end of the blades into the peripheral edge of the central disk. - Figure 12 is an enlarged view of the detail B of Figure 10 showing the positioning of a second end of the blades into the end rings.
- Figure 13 is a longitudinal cross-sectional view of the apparatus of Figure 8 shown during the first phase of the operation of rolling the end rings and the central disk on the blade ends. - Figure 14 is an enlarged view of the detail A of Figure 13 showing the first phase of the operation of rolling the central disk on a first end of the blades.
- Figure 15 is an enlarged view of the detail B of Figure 13 showing the first phase of the operation of rolling the end rings on a second end of the blades.
- Figure 16 is a longitudinal cross-sectional view of the apparatus of Figure 8 showing a second phase of the operation of rolling the end rings and the central disk on the blade ends. - Figure 17 is an enlarged view of the detail A of Figure 16 showing the second phase of the operation of rolling the central disk on a first end of the blades.
- Figure 18 is an enlarged view of the detail B of Figure 16 showing the second phase of the operation of rolling the end rings on a second end of the blades.
- Figure 19 is a longitudinal cross-sectional view of the apparatus of Figure 8 shown during the operation of flanging the end rings and the central disk on the blade ends. - Figure 20 is an enlarged view of the detail A of Figure 19 showing the operation of flanging the central disk on a first end of the blades.
- Figure 21 is an enlarged view of the detail B of Figure 19 showing the operation of flanging the end rings on a second end of the blades.
Description of a preferred embodiment of the invention
With reference to Figs. 1 to 7 of the drawings, the proposed embodiment of the fan wheel of the double suction type consists essentially of a plurality of blades 10 of suitable shape having at their axial end bases or feet 11 which are adapted to be arranged along a circumference and are in contact one with the other for determining the desired pitch between the blades 10. These blades, together with the relevant feet, can be obtained in a known manner by sheet blanking.
The structure of the fan wheel is formed of two groups or arrays 12 of blades, arranged side by side, and each consisting of a predetermined number of blades 10 arranged to form a cylindrical surface. This structure is made self-supporting by means of a pair of end rings 13, each of which being substantially U-shaped (Figure 7) in cross-section so as to form a hollow section for receiving the blade feet 11, with one side of the said U- shaped hollow section of the end rings being bent over the blade feet 11 to constrain the same (Figure 6). The structure of the fan wheel is then completed by a central disk 14 formed of a pair of half-disks 14A and 14B, opposite each other and joined together, carrying the hub of the fan wheel and having a peripheral edge forming in cross-section a substantially U- shaped hollow section (Figure 5), similar to that of the end rings 13, for receiving the blade feet 11 opposite to those constrained by the end rings 13, one side of said U-shaped hollow section of the peripheral edge of the central disk being bent over said blade feet 11 to constrain the same (Figure
4). For the construction of a fan wheel of the illustrated type there is provided, according to the invention, an apparatus whose main components are shown in Figs. 8 and 9 of the drawings. Essentially, this apparatus consists of an assembly mandrel 15 formed of two substantially symmetrical cylindrical components or drums 16 and 17, which are displaceable one relative to the other and are operable to rotate about a common axis, and a pair of circular plates 18 and 19 which are slidably mounted on the opposite ends of the assembly mandrel 15. Drums 16 and 17 are provided with retaining means, e.g. of elastic or magnetic type, arranged on their lateral surface, for temporary holding in position the blades 10 of the fan wheel during the construction operations thereof. Drums 16 and 17 are furthermore provided with mating coupling elements 21 and 22 which are arranged on their facing base surfaces and are adapted to establish a connection between the said drums when these are in an approached position, in order to permit an exactly congruent rotation thereof during the rolling and flanging operations of the fan wheel, as will be described in more detail in the following section in connection with the various operations for the construction of the fan wheel. The assembly mandrel 15 furthermore comprises seats 23 and 24 which are adapted for supporting and holding in position the end rings 13 and the central disk 14, respectively. Proximate said seats on the end rings and the central disk, the apparatus is provided with rolling and flanging devices 25 and 26, respectively, of known type, e.g. consisting of pins and arms carrying rolling and flanging wheels, respectively, which are capable of being lowered, by action of one or more hydraulic actuators, on the end rings 13 and the central disk 14 to bend the edges thereof on the feet 11 of the blades 10.
Before the beginning of the construction cycle of the fan wheel, an operator provides for the assembly of the central disk 14 and the connection of the hub thereto. Thereafter, the operator mounts the central disk 14 on the assembly mandrel 15 and positions it in the corresponding seat 24. The operator then positions the end rings 13 in the corresponding seats 23 of the circular plates 18 and 19 and places the blades 10 on the drums 16 and 17. Finally, the side plates 18 and 19 are mounted on the ends of the assembly mandrel 15 for holding in position the end rings 13. The apparatus is thus ready to begin the construction cycle of the fan wheel which will be described in the following section with reference to Figs. 10 to 21 of the drawings.
The construction cycle begins with the side plates 18 and 19 being moved towards each other into an approached position, wherein the drums
16 and 17 are arranged side by side and the coupling elements 21 and 22 establish a functional connection between said drums 16 and 17. When the drums 16 and 17 are in the approached position, the feet 1 ϊ of the blades 10 are placed inside the U-shaped hollow section of the end rings 13 and of the peripheral edge of the central disk 14 (Figs. 11 and 12).
Thereafter, the drums 16 and 17 are placed in rotation and the rolling devices 25 are positioned on the end rings 13 and on the central disk 14, in order to bend their sides over the feet 11 of the blades 10. The rolling operation generally comprises two phases. In a first phase of the roiling operation, the edges of the end rings 13 and of the central disk 14 are bent inwardly (Figs. 13 to 15). In a second phase of the rolling operation, the edges of the end rings 13 and of the central disk 14 are bent over the feet 11 of the blades 10 (Figs. 16 to 18). During or after this second phase of the rolling operation, also the flanging devices 16 are positioned on the end rings 13 and on the central diskl4 for pressing the edges thereof against the feet 11 of the blades 10 (Figs. 19 to 21).
The construction cycle of the fan wheel ends with the drums 16 and
17 being moved to a spaced apart position in which the fan wheel can be removed from the assembly mandrel 15. In this position, the operator then mounts the end rings 13 and the central disk 14 and places the blades 10 for the beginning of the construction cycle of another fan wheel.
From the foregoing it is apparent that the apparatus can achieve the proposed objects, and in particular it allows the blade feet to be fastened to the end rings and to the central disk in a single assembly operation.
Obviously, many variants which are apparent to the skilled in the art can be applied to the embodiment as described and shown, without departing from the scope and domain of the appended claims.

Claims

1. Apparatus for the construction of fan wheels of the double suction type, comprising a plurality of inclined blades arranged on a cylindrical surface, a pair of blade restraining end rings and at least one central disk supporting the blades and carrying the fan wheel hub, characterised in that said apparatus comprises an assembly mandrel formed of two cylindrical components displaceable one relative to the other and operable to rotate about a common axis, and a pair of circular plates slidably mounted on the ends of the assembly mandrel, said assembly mandrel carrying seats adapted for supporting and holding in position the end rings and the central disk, and said cylindrical components of the assembly mandrel being provided with retaining means, arranged on the lateral surface thereof, for temporary holding in position the blades of the fan wheel during the construction operations thereof, and in that roiling and flanging devices are mounted near said seats of the end rings and the central disk on the assembly mandrel for rolling and flanging said end rings and said central disk onto the blade ends, and in that said cylindrical components of the assembly mandrel are axially displaceable one relative to the other, upon action of said circular plates, between a spaced apart position for mounting said end rings and said central disk and an approached position for carrying out the rolling and flanging operations of said end rings and said central disk onto the blade ends, and in that said cylindrical components are provided on their facing base surfaces with mating coupling elements adapted to establish a connection between the cylindrical components in their approached position, in order to permit an exactly congruent rotation thereof during the rolling and flanging operations. ,
2. Apparatus according to claim 1, characterised in that the blade retaining means are of resilient or magnetic type.
3. Apparatus according to claim 1, characterised in that the coupling means are arranged symmetrically on the facing base surfaces of the cylindrical components.
4. Apparatus according to claim 1, characterised in that the rolling devices are formed of pins carrying rolling wheels capable of being lowered on the end rings and the central disk to bend the edges thereof on the blade feet.
5. Apparatus according to claim 1, characterised in that the flanging devices are formed of arms carrying flanging wheels capable of being lowered on the end rings and the central disk to join together the edges thereof and the blade feet
6. Apparatus according to claim 1, characterised in that the rolling and flanging devices are operable by means of hydraulic actuators.
EP10727977.0A 2009-04-21 2010-04-19 Apparatus for the construction of fan wheels of the double suction type Active EP2422095B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2009A000666A IT1393947B1 (en) 2009-04-21 2009-04-21 EQUIPMENT FOR THE MANUFACTURE OF FAN IMPELLERS OF THE DOUBLE SUCTION TYPE
PCT/IT2010/000195 WO2010122594A1 (en) 2009-04-21 2010-04-19 Apparatus for the construction of fan wheels of the double suction type

Publications (2)

Publication Number Publication Date
EP2422095A1 true EP2422095A1 (en) 2012-02-29
EP2422095B1 EP2422095B1 (en) 2016-08-31

Family

ID=41268146

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10727977.0A Active EP2422095B1 (en) 2009-04-21 2010-04-19 Apparatus for the construction of fan wheels of the double suction type

Country Status (4)

Country Link
EP (1) EP2422095B1 (en)
CN (1) CN102395797B (en)
IT (1) IT1393947B1 (en)
WO (1) WO2010122594A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2537805A (en) * 1945-12-17 1951-01-09 Lau Blower Co Blower
US2628419A (en) * 1946-11-22 1953-02-17 Lau Blower Co Blower
US2982468A (en) * 1955-10-31 1961-05-02 Ruth D Mayne Blower wheel and method of making same
US3335482A (en) * 1962-10-18 1967-08-15 Samuel F Mcclatchie Assembly of blower wheels
US3711914A (en) * 1970-12-07 1973-01-23 Morrison Products Inc Method for assembling centrifugal blowers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010122594A1 *

Also Published As

Publication number Publication date
CN102395797A (en) 2012-03-28
IT1393947B1 (en) 2012-05-17
CN102395797B (en) 2014-03-19
ITMI20090666A1 (en) 2010-10-22
WO2010122594A1 (en) 2010-10-28
EP2422095B1 (en) 2016-08-31

Similar Documents

Publication Publication Date Title
JP5778740B2 (en) Omnidirectional moving wheel and omnidirectional moving vehicle equipped with the same
CN102896260B (en) On wheel hub inner ring, form the method for front ring gear
CN102896268B (en) The method forming front ring gear on wheel hub inner ring
US10378643B2 (en) Planetary drive comprising a planet carrier
CA2678716A1 (en) Apparatus and method for ram bending of tube material
JP2018176990A5 (en)
US1740800A (en) Method of making blade rings for radial-flow turbines
EP2422095B1 (en) Apparatus for the construction of fan wheels of the double suction type
CN109366650B (en) An internally supported adaptive bamboo tube degreening support mechanism
US2982468A (en) Blower wheel and method of making same
WO2006114915A1 (en) Retainer for radial needle bearing, method of manufacturing the same, and radial needle bearing
KR101338162B1 (en) Jig assembly for manufacturing coil assembly and manufacturing method using the jig assembly
US2821778A (en) Fixture for assembling blower wheels
CN218575585U (en) Universal machining clamp for rim
TWI465351B (en) Bicycle rim and method of manufacture thereof
US3021591A (en) Method of making blower rotor
CN110177631A (en) Fence post straightener
KR102181517B1 (en) removable air-foil journal bearing
WO2009054365A1 (en) Manufacturing method of rotary electric machine and rotary electric machine
JP5200265B2 (en) Guide wheel for hydrodynamic torque converter, method for manufacturing such a guide wheel and hydrodynamic torque converter with such a guide wheel
CN212264617U (en) An automobile wheel hub processing fixture
JP2009531609A5 (en)
US10958144B2 (en) Method of manufacturing an induction rotor
CN112547985B (en) Coil winding system integrating functions of straightening, winding and stripping
CN219076914U (en) Omnidirectional wheel easy to assemble and disassemble

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20111014

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

RIN1 Information on inventor provided before grant (corrected)

Inventor name: COLLU, FRANCO

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20141210

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20160513

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602010036003

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 825250

Country of ref document: AT

Kind code of ref document: T

Effective date: 20161015

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20160831

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 825250

Country of ref document: AT

Kind code of ref document: T

Effective date: 20160831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160831

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160831

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161130

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160831

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160831

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161201

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160831

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160831

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160831

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160831

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160831

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160831

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160831

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170102

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160831

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161130

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160831

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160831

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602010036003

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160831

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20170613

Year of fee payment: 8

Ref country code: CH

Payment date: 20170414

Year of fee payment: 8

26N No opposition filed

Effective date: 20170601

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160831

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 20170427

Year of fee payment: 8

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 9

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20170419

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180430

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180419

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180430

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20100419

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20160831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161231

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 602010036003

Country of ref document: DE

Owner name: REGAL BELOIT ITALY S.P.A., IT

Free format text: FORMER OWNER: NICOTRA GEBHARDT S.P.A., MILANO, IT

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20250429

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20250428

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20250425

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IE

Payment date: 20250428

Year of fee payment: 16