EP1094225B1 - Steuerungsvorrichtung für die Luftschleusen eines Gebläses - Google Patents

Steuerungsvorrichtung für die Luftschleusen eines Gebläses Download PDF

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Publication number
EP1094225B1
EP1094225B1 EP19990830664 EP99830664A EP1094225B1 EP 1094225 B1 EP1094225 B1 EP 1094225B1 EP 19990830664 EP19990830664 EP 19990830664 EP 99830664 A EP99830664 A EP 99830664A EP 1094225 B1 EP1094225 B1 EP 1094225B1
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EP
European Patent Office
Prior art keywords
assembly according
shaft
control organ
ventilator assembly
fan
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.)
Expired - Lifetime
Application number
EP19990830664
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English (en)
French (fr)
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EP1094225A1 (de
Inventor
Antonio Papone
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Individual
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Individual
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Filing date
Publication date
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Priority to DE1999602175 priority Critical patent/DE69902175T2/de
Priority to EP19990830664 priority patent/EP1094225B1/de
Publication of EP1094225A1 publication Critical patent/EP1094225A1/de
Application granted granted Critical
Publication of EP1094225B1 publication Critical patent/EP1094225B1/de
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Expired - Lifetime legal-status Critical Current

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    • 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
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/12—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit being adapted for mounting in apertures
    • F04D25/14—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit being adapted for mounting in apertures and having shutters, e.g. automatically closed when not in use

Definitions

  • the present invention relates to a ventilator assembly of the kind comprising actuator means operatively engaged between a fan and an air lock, said actuator means being able to sense the rotation of the fan to switch the air lock selectively between an open condition and a closed condition, respectively in response to the activation and the de-activation of the fan itself, said actuator means comprising: a control organ able to translate between a first and a second operative position; and a kinematic transmission mechanism operatively associated to the control organ to switch the air lock from the closed condition to the open condition as a result of the translation of the control organ from the first to the second operative position.
  • the subject device is suitable for being associated to a ventilation unit of the type generally used, for instance, to guarantee aeration in loft buildings, barns and, more in general, in spaces dedicated to agricultural and/or industrial uses.
  • the ventilation units of the aforementioned type essentially consist of a fan able to be actuated in rotation by an electric motor and housed in a box structure open upstream and downstream of the fan to allow the passage of the flow of air produced thereby.
  • an air lock which can be opened by means of a control device associated to the ventilator which exploits the rotatory motion transmitted to the fan to cause the air lock to open and close.
  • control device is described in European Patent EP 563875.
  • This control device is constituted by a kinematic mechanism able to be rigidly engaged to the fan by means of an attachment portion bearing guide means whereon a control organ is slidingly engaged.
  • the control organ is fastened to the base portion by means of two or more articulated arms bearing respective masses in proximity to an intermediate articulation area.
  • the air lock is caused to open by means of an interconnecting kinematic mechanism operatively interposed between the control organ and air lock itself.
  • the device described above presents considerable problems connected to the complexity of its structure. This device is easily prone to jamming or malfunctions due to the deposit of impurities and dirt on the numerous parts in relative motion, directly exposed to the flow of air and of external agents.
  • the device presents rather high realisation costs, which are compounded by the need to perform frequent maintenance operations to maintain the device constantly clean.
  • the aim of the present invention is substantially that of solving the problems noted in the prior art, proposing a device which offers a better effectiveness whilst presenting an extremely simple structure with reduced size, easily protected against the entry of impurities.
  • the number 1 indicates in its entirety a ventilator assembly, according to the present invention.
  • the ventilator assembly comprises a fan 2 actuated by an electric motor and normally positioned in a box structure open on two opposite sides, to allow the axial passage of the flow of air produced thereby.
  • an air lock 2a serving the function of impeding the flow of air when fan is inactive.
  • the air lock 2a comprises a plurality of parallel strips, whereof only one has been shown in Figure 1, the air lock being known an conventional in itself, as are the motor, the box structure and other components of the ventilator, which are therefore neither illustrated nor described in detail.
  • the ventilator assembly 1 is able to be operatively interposed between the fan 2 and the shutter 2a to cause, simultaneously with the activation of the fan, the air lock to switch from a closed condition, wherein the aforesaid strips 2a are positioned on a common plane, and an open condition wherein the strips are oriented according to mutually parallel planes, to allow the passage of air.
  • the actuator means 3 comprise a control organ 4 able to be engaged co-axially and rigidly to the fan 2 by means of a flange 5.
  • the control organ 4 is associated to a shaft 6 able to be co-axially engaged in a hole 4a, preferably through, obtained co-axially in the control organ itself.
  • the shaft 6 can be constituted by the same shaft associated to the motor of the ventilator, or it can be realised as a part distinct from the motor and able to be operatively engaged to its shaft.
  • Interconnecting means 7 interposed between the shaft 6 and the control organ 4 connect the latter slidingly in the axial direction and integrally in the rotatory direction with respect to the shaft itself.
  • the interconnecting means 7 comprise at least a cursor 8 slidingly guided in at least a longitudinal groove 9 defined in the shaft 6 and/or in the hole 4a obtained in the control organ 4.
  • the interconnecting means 6 can for instance be defined by a pair of cursors 8 operating on respective pairs of longitudinal grooves 9 obtained both on the shaft 2 and in the hole 4a of the control organ 4. More specifically, the cursors 8 are defined by one or more pins 10 diametrically traversing the shaft 6 and presenting opposite extremities engaged in the respective longitudinal grooves 9. Sliding rollers 11 can also be present, pivoted at the extremities of each pin 10 to facilitate the sliding of the control organ 4 with respect to the shaft 6.
  • each cursor 8 comprises a sphere engaged between two longitudinal grooves 9 shaped in a complementary manner to the sphere, whereof one belongs to the hole 4a of the control organ 4, and the other to the shaft 6.
  • the interconnecting means 7 provide as a cursor 8 a key engaged between two longitudinal grooves 9 shaped in complementary manner to the key, obtained respectively on the shaft 6 and in the hole 4a of the control organ 4.
  • the control organ 4 presents a first extremity 4b oriented towards the air lock 2a whereto a transmission mechanism 12 is connected, able operatively to connect the control organ to the air lock itself.
  • the transmission mechanism 12 essentially comprises a control rod 13 pivoted and axially fastened with respect to the control organ 4, in such a way as to be involved in the axial movements made by the control organ itself, but not in its rotatory motion.
  • control rod 13 is preferentially engaged to the control organ 4 with the interposition of at least an internally hollow bell element 14, presenting a first extremity 14a engaged, preferably by screwing, to the first extremity 4a of the control organ and a second extremity 13b pivoted to the control rod 13.
  • control rod 13 and the bell element 14 are preferably interposed a rolling bearing to reduce friction during the operation of the ventilator.
  • the engagement of the bearing 15 between the control rod 13 and the bell element is preferably obtained by forced keying, so as also to obtain the axial locking of the rod itself with respect to the control organ 4.
  • the control rod 13 further presents a terminal head 13a having increased diameter, laterally interacting against the rolling bearing 14.
  • control rod presents an extremity 13b connected to the shutter 2a of the fan through a connecting rod 16.
  • connection between the control rod 13 and the control organ 4 can take place in any other convenient manner, differing from the one provided above.
  • the control rod 13 can be fastened directly to the extremity 4b of the control organ 4, if the latter is realised according to a closed configuration, in such a way as to incorporate in a single body the bell element 14.
  • the control rod 13 could be engaged in a relationship of sliding contact on the flange 5 of the control organ 4 to activate the transmission mechanism 12 as a result of the axial movements made by the control organ itself.
  • connection between the control organ 4 and the shaft 6 effected by the interconnecting means 7 is such that, when the motor of the ventilator is activated, the rotation of the shaft 6 is transmitted to the control organ 4 and to the fan 2 fastened thereto, through the cursors 8 engaged in the respective grooves 9.
  • the action of the fan 2 produces an axial thrust, directed opposite to the air flow produced thereby, which is consequently transmitted to the control organ 4.
  • the engagement effected by the interconnecting means 7 is such that, under the effect of the aforementioned axial thrust, the control organ 4 is able to be translated axially with respect to the shaft 6 between a first and a second operative position, whereto respectively correspond the closed condition and the open condition of the air lock 2a.
  • the translation of the control organ 4 can be caused to stop in the second operative position by the interference in checking relationship of the terminal head 13a of the rod 13 against the extremity of the shaft 6.
  • This limit stop in the second operative position can be advantageously adjusted by modifying the degree of screwing of the bell element 14 on the first extremity 4b of the control organ 4.
  • a locking ring nut 14c can be positioned on the first extremity 4b of the control organ 4 to lock the bell element 14 in the desired position.
  • the actuation of the control organ 4 from the first to the second operative position preferably takes place in opposition to the action of return means 17 which tend to bring the air lock 2a back to the closed condition.
  • these return means 17 essentially comprise at least a helical spring 18 positioned co-axially on the shaft 6 and operating, with the respective opposite extremities, between a diametrical shoulder 19 rigidly borne by the shaft 6 and a further diametrical shoulder defined by a second extremity 4c of the control organ 4.
  • the helical spring 18 is axially compressed as a result of the translation of the control organ 4 from the first to the second operative position to return the air lock 2a elastically in the closed condition when, consequently to the de-activation of the ventilator, the axial thrust produced by the fan 2 ceases.
  • the return means can be realised differently from the description provided above.
  • the presence of a helical spring 18 can be revealed unnecessary if the ventilator, and consequently the ventilator assembly 1, is installed according to a vertical axis.
  • an extensible protecting shroud 20 constituted for instance by a bellows shaped sleeve made of elastomeric material, enclosing the spring within it in such a way as prevent dirt and/or external agents from reaching the spring itself, as well as the internal components of the interconnecting means 7 and of the ventilator assembly 1 in general.
  • an extensible protecting shroud 20 constituted for instance by a bellows shaped sleeve made of elastomeric material, enclosing the spring within it in such a way as prevent dirt and/or external agents from reaching the spring itself, as well as the internal components of the interconnecting means 7 and of the ventilator assembly 1 in general.
  • the entry of dirt and of external agents is adequately impeded by the bell element 14.
  • the present invention reaches the proposed aims.
  • the extremely simple and compact structure of the device according to the invention entails a considerable increase in its reliability.
  • the device is contained in extremely minimal size and can be easily protected against the entry of impurities and external agents.
  • the axial force produced by the fan is very large in that it can easily reach and exceed values of 20 kg, significantly greater than the thrust force achievable by prior art devices operating with centrifugal masses. This feature guarantees the effectiveness and functionality of the device, even in the case wherein, as normally occurs over time, the deposit of dirt and/or external agents cause the components of the air lock to lose some of their operating smoothness.

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

Claims (14)

  1. Ventilatoranordnung umfassend:
    Stellantriebe (3), die wirksam zwischen einem Lüfterrad (2) und einem Luftschieber (2a) in Eingriff stehen, wobei die Stellantriebe (3) auf die Drehung des Lüfterrades (2) ansprechen, um teilweise den Luftschieber (2a) zwischen einer Offenstellung und einer Schließstellung jeweils auf das Ansprechen der Betätigung und des Anhaltens des Lüfterrades selbst zu schalten,
    wobei die Stellantriebe (3) umfassen:
    ein Steuerorgan (4), das koaxial und starr mit dem Lüfterrad (2) in Eingriff gebracht werden kann und zwischen einer ersten und zweiten Arbeitsstellung zusammen mit dem Lüfterrad selbst durch einen durch das umlaufende Lüfterrad (2) erzeugten Axialschub verstellbar ist;
    ein dem Steuerorgan (4) wirksam zugeordnetes Getriebe (12), um den Luftschieber (2a) von der Schließstellung in die Offenstellung infolge der translatorischen Bewegung des Steuerorgans (4) von der ersten in die zweite Arbeitsstellung umzuschalten.
  2. Ventilatoranordnung nach Anspruch 1, umfassend überdies Verbindungsmittel (7), um das Steuerorgan (4) gleitbar in Axialrichtung und drehfest mit einer Welle (6) zu verbinden, die durch einen Antrieb des Ventilators in Drehung versetzbar ist.
  3. Ventilatoranordnung nach Anspruch 2, bei der die Verbindungsmittel (7) mindestens einen Läufer (8) umfassen, der in mindestens einer Längsnut (9) verschiebbar geführt ist, die in der Welle (6) und/oder in einer Bohrung (4a) festgelegt ist, die im Steuerorgan (4) koaxial ausgenommen ist und mit der Welle selbst in Eingriff steht.
  4. Ventilatoranordnung nach Anspruch 3, bei der mindestens ein Läufer (8) mindestens einen Dorn (10) umfasst, der die Welle (6) diametral durchdringt und abgewandte Enden aufweist, die in entsprechenden Nuten (9) eingreifen, die in der Bohrung (4a) ausgenommen sind.
  5. Ventilatoranordnung nach Anspruch 4, umfassend überdies Laufrollen (11), die an den Enden eines jeden Dornes (10) drehbar in Eingriff stehen.
  6. Ventilatoranordnung nach Anspruch 3, bei der jeder Läufer (8) mindestens eine Kugel umfasst, die zwischen zwei zu ihr gegenprofilierte Längsnuten (9) in Eingriff steht, die jeweils an der Welle (6) und in der Bohrung (4a) ausgenommen sind.
  7. Ventilatoranordnung nach Anspruch 3, bei der jeder Läufer (8) mindestens einen Keil umfasst, der zwischen zwei zu ihm gegenprofilierte Längsnuten (9) in Eingriff steht, die jeweils an der Welle (6) und in der Bohrung (4a) ausgenommen sind.
  8. Ventilatoranordnung nach Anspruch 1, umfassend überdies Rückholmittel (17), die in Gegenwirkung zur translatorischen Bewegung des Steuermittels (4) von der ersten in die zweite Arbeitsstellung wirken.
  9. Ventilatoranordnung nach Anspruch 2 und 8, bei der die Rückholmittel (17) mindestens eine Schraubenfeder (18) umfassen, die koaxial an der Welle (6) angeordnet ist und zwischen einem ersten und einem zweiten Absatz (9, 4c) wirkt, die jeweils von der Welle selbst und von der Steuerwelle (4) getragen werden.
  10. Ventilatoranordnung nach Anspruch 2, umfassend überdies eine dehnbare Schutzhaube (20), die zwischen dem Steuerorgan (4) und der Welle (6) in Eingriff steht, um den Schmutzzutritt zu den Verbindungsmitteln (7) zu verhindern.
  11. Ventilatoranordnung nach Anspruch 8 und 10, bei der die Rückholmittel (17) in der ausdehnbaren Schutzhaube (20) eingeschlossen sind.
  12. ventilatoranordnung nach Anspruch 1, bei der das Getriebe (12) eine Steuerstange (13) mit einem Ende umfasst, das gegenüber dem Steuerorgan (4) drehbar in Eingriff und axial befestigt liegt.
  13. Ventilatoranordnung nach Anspruch 12, umfassend überdies ein glockenartiges Element (14) mit einem ersten, am Steuerorgan (4) befestigten Ende(14a) und einem zweiten Ende (14b), das drehbar die genannte Steuerstange (13) ergreift.
  14. Ventilatoranordnung nach Anspruch 2 und 13, bei der die Steuerstange (13) einen Endabschnitt (13a) aufweist, der bereitgestellt ist, im Anschlag gegen die Welle (6) zu wirken, um die translatorische Bewegung des Steuerorgans (4) in der zweiten Arbeitsstellung zu arretieren.
EP19990830664 1999-10-21 1999-10-21 Steuerungsvorrichtung für die Luftschleusen eines Gebläses Expired - Lifetime EP1094225B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE1999602175 DE69902175T2 (de) 1999-10-21 1999-10-21 Steuerungsvorrichtung für die Luftschleusen eines Gebläses
EP19990830664 EP1094225B1 (de) 1999-10-21 1999-10-21 Steuerungsvorrichtung für die Luftschleusen eines Gebläses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19990830664 EP1094225B1 (de) 1999-10-21 1999-10-21 Steuerungsvorrichtung für die Luftschleusen eines Gebläses

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EP1094225A1 EP1094225A1 (de) 2001-04-25
EP1094225B1 true EP1094225B1 (de) 2002-07-17

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DE (1) DE69902175T2 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITGE20010089A1 (it) * 2001-11-14 2003-05-14 Roberto Pericoli Dispositivo regolatore centrifugo per l'azionamento automatico di serrande di ventilatori.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3431459A1 (de) * 1984-01-14 1985-07-18 Byung Eun Daegu Yoo Luefter
IT1259380B (it) * 1992-04-01 1996-03-12 Euroemme Spa Dispositivo regolatore centrifugo per l'apertura e la chiusura della serranda di un gruppo elettroventilatore assiale e gruppo elettroventilatore utilizzante tale dispositivo
DE4211028A1 (de) 1992-04-02 1993-10-07 Linde Ag Fahrzeug mit einer Antriebseinheit und daran angeschlossenen Leitungen

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EP1094225A1 (de) 2001-04-25
DE69902175D1 (de) 2002-08-22
DE69902175T2 (de) 2002-11-14

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