EP1359326B1 - Nach dem Zentrifugalprinzip arbeitende Betätigungsvorrichtung zum automatischen Öffnen der Lamellen eines Gebläses - Google Patents

Nach dem Zentrifugalprinzip arbeitende Betätigungsvorrichtung zum automatischen Öffnen der Lamellen eines Gebläses Download PDF

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Publication number
EP1359326B1
EP1359326B1 EP02380088A EP02380088A EP1359326B1 EP 1359326 B1 EP1359326 B1 EP 1359326B1 EP 02380088 A EP02380088 A EP 02380088A EP 02380088 A EP02380088 A EP 02380088A EP 1359326 B1 EP1359326 B1 EP 1359326B1
Authority
EP
European Patent Office
Prior art keywords
louvers
fan
plate
moving plate
cranks
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
EP02380088A
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English (en)
French (fr)
Other versions
EP1359326A1 (de
Inventor
Juan Pascual Nadal
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.)
PASCUAL NADAL, JUAN
Original Assignee
Exafan SA
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Filing date
Publication date
Application filed by Exafan SA filed Critical Exafan SA
Priority to AT02380088T priority Critical patent/ATE410600T1/de
Priority to ES02380088T priority patent/ES2314024T3/es
Priority to DK02380088T priority patent/DK1359326T3/da
Priority to EP02380088A priority patent/EP1359326B1/de
Priority to DE60229217T priority patent/DE60229217D1/de
Priority to PT02380088T priority patent/PT1359326E/pt
Publication of EP1359326A1 publication Critical patent/EP1359326A1/de
Application granted granted Critical
Publication of EP1359326B1 publication Critical patent/EP1359326B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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 centrifugal drive device for automatic opening of fan louvers, among those commonly used for ventilating large hangars, such as those used for raising animals.
  • This second plate is guided and by means of a rod, which is disengaged from the rotation motion by means of bearings, it pushes the central louver, which in turn with a common guide opens all the remaining louvers.
  • louvers prevent air, dirt and even animals from entering when the fan is stopped.
  • louvers are usually installed in the same structure that acts as a casing and support for the fan.
  • Auxiliary devices for the correct operation of the fan are usually installed in this structure.
  • the electric power line for the fan impelling motor arrives at this assembly.
  • louvers open when the fan is turned on in order to allow the air to pass; otherwise, the difference in pressure caused by the fan could damage the louvers or even the electric motor as there would not be enough refrigeration to dissipate the heat generated.
  • the louvers can be opened manually, by additional driving means or using the motion of the fan.
  • the first option is not desirable, as in the case of an oversight or mistake the aforementioned damage may occur and the air would not pass.
  • the second option is feasible, but requires the inclusion of an additional driving device, resulting in increased likelihood of malfunctions, greater cost of the equipment and increased complexity on the whole.
  • This document describes a device employing two masses attached to either end of a bar by two arms capable of opening by pivoting about said end.
  • these arms are connected to a connecting rod that links to a second small plate that may move axially.
  • the fully open position implies a position of the connecting rods that is perpendicular to the shaft, where the axial force tends to zero.
  • the initial position is restored by a spring.
  • Patent DE3739871 describes a fan with a casing such that its blades establish a closing when stopped.
  • Patent EP489466 A later state of the art is determined by Patent EP489466 .
  • This patent describes a centrifugal impulsion device applied to fan louvers.
  • Patent no. EP563875 posterior, is an improvement of the first designs described in the aforementioned US Patent 4,217,816 .
  • EP-A-5 563 875 discloses a centrifugal drive device according to the preamble of claim 1.
  • the present invention describes a driving device that overcomes previously known designs of the state of the art by using a special simple, sturdy, stable, balanced configuration with an improved axial impulsion capacity.
  • the present invention relates to a centrifugal drive device for automatically opening the louvers of a fan and which therefore does not require an auxiliary motor.
  • the fans for which it is designed comprise an outer casing which surrounds the fan and which in turn supports the drive motor and the traction means.
  • the side that is installed on the outside of the hangar is covered by a set of horizontal louvers that pivot about a horizontal shaft that is slightly separated from the centre of mass, so that they tend to remain closed.
  • louvers pivot about a horizontal shaft by means of lateral clips capable of turning that hold them in place.
  • the vertical alignment of the louvers is connected by a common guide. Between this guide and each louver is an intermediate connecting rod in charge of defining a single degree of freedom in the opening of all louvers.
  • an impulsion rod At a central point and therefore one near the fan shaft there is provided an impulsion rod.
  • This rod pushes on one of the clips such that when this clip opens the others open as well, due to the guide or guides.
  • the rod impulsion is what is achieved by the device object of the invention.
  • the device object of the invention is installed in the fan shaft such that it turns together with the impulsion of the motor.
  • the fan rotation causes a force to act on inertial masses that is used to make the louvers open.
  • the device comprises two plates, a main plate solidarily joined to the fan and fixed with respect to it, and a second, mainly rectangular plate that can move axially with respect to the first one by virtue of four guides, each of which is at a corner of the rectangle.
  • the support plate can be referred to as the fixed plate and the axially sliding plate can be referred to as the moving plate, keeping in mind that the reference is subject to a rotation about the fan shaft so that there are inertial forces acting on the masses of this system.
  • the four guides allow the axial displacement between the plates, where in turn the guides show their main planes parallel.
  • the main plate extends its greater sides beyond the moving plate, on the ends of which are corresponding elbows with a joint that can turn about a shaft parallel to the minor sides.
  • the outer arm of the crank which is parallel to the main rotation axis, is provided on its end with an inertial mass that during rotation suffers the action of a centrifugal force in a radial sense.
  • the other arm located between the plates, is provided on its end with a roller inside a groove common to the roller of the opposite crank.
  • This groove is perpendicular to the main rotation axis and defines a cam in which the two rollers are the followers.
  • the centrifugal force acts on all separate elements of the main axis and to a greater extent the greater the diameter and its mass.
  • the materials used for this device are lightweight, so that the inertial mass placed on the ends of the crank present dominating forces with respect to those of for example the rest of the arm that supports these masses.
  • cranks open the opposite ends of the cranks describe an arc about the joint that can be broken down into two projections, an axial one and one radial or perpendicular to the axis of rotation of the device.
  • the axial displacement pushes the moving plate to separate it, while the radial displacement simply implies a sliding of the roller inside the groove of the moving plate which houses it.
  • the two cranks open simultaneously as the four guides that keep the moving plate parallel to the fixed plate impose a single degree of freedom to the entire device.
  • cranks The full opening of the cranks is achieved when the rollers reach the end of the race in the groove or cam of the moving plate.
  • the angle encompassed reduces to an extent the projection of the inertial force tangent to the rotation about the joint; however, because of its greater distance from the axis the greater modulus of the centrifugal force compensates its smaller projection.
  • the axial displacement of the moving plate carries with it the pushing rod that opens the central louver and with it the other louvers.
  • the device rotation is disengaged in the rod union by the presence of a bearing placed at the union with the moving plate.
  • the only energy dissipated is that due to the aerodynamic drag in the rotation of the device.
  • Figure 1 shows a scheme of a side view of the assembly formed by the fan, the centrifugal drive device, the louvers and the opening guides when the operator is resting.
  • Figure 2 shows a scheme of the side view of the assembly formed by the fan, the centrifugal drive device, the louvers and the opening guides when the operator is rotating at the nominal speed.
  • Figure 3 shows a perspective view of the centrifugal drive device for the lovers of the fan plus the push rod in its resting position.
  • Figure 4 shows a plan view of the centrifugal drive device for the lovers of the fan plus the push rod in its resting position.
  • Figure 5 shows a perspective view of centrifugal drive device for the lovers of the fan plus the push rod in the open position when operating at the nominal speed.
  • Figure 6 shows a plan view of the centrifugal drive device for the lovers of the fan plus the push rod in an open position when operating at the nominal speed.
  • the present invention consists of a centrifugal drive device for the automatic opening of fan louvers.
  • Figures 1 and 2 show the same fan with its casing and louvers corresponding to the stopped fan position and the nominal rotation speed position respectively.
  • Each louver (7) turns about a horizontal axis displaced from its centre of gravity so that the action of gravity makes it close.
  • louvers (7) open by the pushing action of a pushing rod (4) that in turn is pushed by the centrifugal device (3) object of this invention.
  • the centrifugal device (3) is in charge of pushing the louvers (7) through the pushing rod (4).
  • This pushing rod (4) also makes the device (3) recover its original position by action of the weight of the louvers (7) that tend to close.
  • the centrifugal device (3) is installed in the central part (1) of the fan, from where extend the vanes (2), being integrally joined to the fan and rotating together with it.
  • the device (3) is provided with two plates, a fixed plate (3.1) and a moving plate (3.2), taking as a fixed reference the central rotating core of the fan (1).
  • the fixed plate (3.1) connects to the central core (1) of the fan by front anchoring means (3.1.1) that secure it and maintain it firmly in place against the inertial and axial stresses it must withstand.
  • This fixed plate (3.1) extends laterally as elbowed ends in which is provided a joint (3.1.2) about which pivot two cranks (3.4).
  • the front part of the moving plate (3.2) opposite the fixed plate (3.1) has a groove (3.2.1) centred and parallel to the greater sides of the moving plate (3.2).
  • each crank (3.4) Between the fixed plate (3.1) and the moving plate (3.2) is located one end of each crank (3.4). At this end it is provided with a roller (3.4.2) internal of the groove (3.2.1), determining a linear sliding motion between the end of the crank (3.4) and the moving plate (3.2).
  • the other arm of the crank (3.4) is at an angle of ⁇ /4 to the inner arm and is provided at its end with a mass (3.4.1).
  • crank (3.4) about the joint (3.1.2) implies the rotation of the inner end and therefore of the roller (3.4.2) inside the groove (3.2.1) of the moving plate (3.2).
  • the arc described by the roller (3.4.2) has two projections, one radial with respect to the rotation axis of the fan, and another axial, so that the former implies an internal sliding in the groove (3.2.1) in which it is housed towards the outside, and the second an axial displacement that pushes the moving plate (3.2) so that it separates from the fixed plate (3.1).
  • This separation is used to push the louvers (7) by means of the intermediate rod (4).
  • the rotation of the device (3) is disengaged from the louvers (7) by a bearing (3.2.2) located on the rear side of the moving plate (3.2).
  • the kinetic assembly formed by the fixed plate (3.1), the moving plate (3.2) and the cranks (3.4) allow only one degree of freedom, represented by the axial displacement of the moving plate (3.2) and that determines uniquely the rotation of the cranks (3.4) with respect to the joint (3.1.2).
  • FIGs 5 and 6 shows the greatest separation of the moving plate (3.2) and therefore the greatest opening of the cranks (3.4).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Housing For Livestock And Birds (AREA)
  • Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)

Claims (1)

  1. Zentrifugale Antriebsvorrichtung für das automatische Öffnen von Lüftungsklappen, eine von den zentrifugalen Vorrichtungen zum Öffnen von Klappen mit einer Wiederherstellung durch Schwerkraft, welche in dem Belüftungsschacht installiert ist und von diesem getrieben wird, dadurch gekennzeichnet, dass sie aus den folgenden Bestandteilen besteht:
    • Zwei Klammern (3.4) mit inerten Massen (3.4.1) auf einem Ende und Rollen (3.4.2) auf dem gegenüberliegenden Ende;
    • Eine fixierte Platte (3.1) mit Verbindungsmitteln (3.1.1) an ihrer Vorderseite und seitliche Verlängerungen, die in einem verbundenen Bogen (3.1.2) enden, um die Klammern (3.4) zu installieren, ebenfalls am hinteren Teil mit vier parallelen Stangen ausgestattet, als Führung (3.3) für das Tragen einer zweiten beweglichen Platte (3.2);
    • Eine im Wesentlichen rechteckige bewegliche Platte (3.2) mit vier Buchsen (3.2.3), jeweils eine auf den vier Ecken des Rechtecks, mit einer quer laufenden Kerbe (3.2.1) auf der Vorderseite als Nocke;
    • Eine Schubstange (4), die an der beweglichen Platte (3.2) befestigt ist und von der Drehbewegung durch ein Lager (3.2.2) ausgekuppelt ist;
    • Eine Vielzahl von Klappen (7) mit exzentrischen Schachten, die dazu neigen, sich unter der Schwerkraft zu schließen und die durch eine gemeinsame Führung (5) miteinander verbunden sind, welche mit den anderen Klappen durch eine Verbindungsstange (6) verbunden ist;
    dadurch gekennzeichnet, dass
    die fixierte Platte (3.1) vollkommen mit dem Schacht der Lüftung (1) verbunden ist, während die bewegliche Platte (3.2) an der fixierten Platte (3.1) durch die vier Buchsen (3.2.3) befestigt ist, was die relative axiale Verschiebung der Platten (3.1, 3.2) ermöglicht, während zur gleichen Zeit die parallele Anordnung der Platte (3.1) und der Platte (3.2) gesichert wird; wobei sich jede Klammer (3.4) um den Schacht dreht, der sich im Winkel befindet und an dem verbundenen Bogen (3.1.2) der fixierten Platte (3.1) befestigt ist, mit dem Arm, der die Massen außerhalb hat, um es den Klammern (3.4) zu ermöglichen, sich beim Drehen des Aufbaus unter Einwirkung der Zentrifugalkraft, zu öffnen, und der Arm ist im Innern angeordnet, mit den Rollen (3.4.2), die zwischen der fixierten Platte (3.4) und der beweglichen Platte (3.2) platziert sind, wobei die Rollen (3.4.2) in der Kerbe (3.1) der beweglichen Platte (3.2) untergebracht sind, so dass das Öffnen der Klammern (3.4) die entsprechende axiale Verschiebung der beweglichen Platte (3.2) bewirkt, bestimmt durch die axiale Projektion des Drehens der Rollen (3.4.2) um ihre Verbindung (3.1.2); wobei diese Verschiebung die Klappen (7) dazu bringt, sich zu öffnen, aufgrund des Drucks, der durch die Stange (4) auf die mittlere Klappe (7) ausgeübt wird, welche ihrerseits die anderen antreibt, durch eine gemeinsame Führung (5), die über eine Verbindungsstange(6) mit allen Klappen (7) verbunden ist.
EP02380088A 2002-04-18 2002-04-18 Nach dem Zentrifugalprinzip arbeitende Betätigungsvorrichtung zum automatischen Öffnen der Lamellen eines Gebläses Expired - Lifetime EP1359326B1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AT02380088T ATE410600T1 (de) 2002-04-18 2002-04-18 Nach dem zentrifugalprinzip arbeitende betätigungsvorrichtung zum automatischen öffnen der lamellen eines gebläses
ES02380088T ES2314024T3 (es) 2002-04-18 2002-04-18 Dispositivo de accionamiento centrifugo para apertura automatica de lamas de ventilador.
DK02380088T DK1359326T3 (da) 2002-04-18 2002-04-18 Anordning drevet af centrifugalkraft til automatisk åbning af ventilatorlameller
EP02380088A EP1359326B1 (de) 2002-04-18 2002-04-18 Nach dem Zentrifugalprinzip arbeitende Betätigungsvorrichtung zum automatischen Öffnen der Lamellen eines Gebläses
DE60229217T DE60229217D1 (de) 2002-04-18 2002-04-18 Nach dem Zentrifugalprinzip arbeitende Betätigungsvorrichtung zum automatischen Öffnen der Lamellen eines Gebläses
PT02380088T PT1359326E (pt) 2002-04-18 2002-04-18 Dispositivo de accionamento centrífugo para abertura automática das persianas de ventiladores

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02380088A EP1359326B1 (de) 2002-04-18 2002-04-18 Nach dem Zentrifugalprinzip arbeitende Betätigungsvorrichtung zum automatischen Öffnen der Lamellen eines Gebläses

Publications (2)

Publication Number Publication Date
EP1359326A1 EP1359326A1 (de) 2003-11-05
EP1359326B1 true EP1359326B1 (de) 2008-10-08

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ID=28799758

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02380088A Expired - Lifetime EP1359326B1 (de) 2002-04-18 2002-04-18 Nach dem Zentrifugalprinzip arbeitende Betätigungsvorrichtung zum automatischen Öffnen der Lamellen eines Gebläses

Country Status (6)

Country Link
EP (1) EP1359326B1 (de)
AT (1) ATE410600T1 (de)
DE (1) DE60229217D1 (de)
DK (1) DK1359326T3 (de)
ES (1) ES2314024T3 (de)
PT (1) PT1359326E (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8899066B2 (en) * 2011-09-07 2014-12-02 General Electric Company System for environmental protection of a heat exchanger
CN107237781B (zh) * 2017-08-15 2023-09-22 广州市伟森机电科技有限公司 一种风机导风页片自动张合的稳定性控制装置
CN109757458B (zh) * 2019-01-31 2021-02-19 华南农业大学 一种多风管风送仿形喷雾机
US11690351B2 (en) 2019-11-14 2023-07-04 The Gsi Group Llc Ventilation fan with synchronous butterfly shutter for animal building

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1243320B (it) * 1990-12-04 1994-05-26 Antonio Gigola Dispositivo che trasforma il moto rotatorio in moto rettilineo ed alternativo adatto per muovere a spinta o a trazione congegni e comandi meccanici precipuamente per chiudere ed aprire in automatico le serrande dei ventilatori a motore
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
TR199800280A3 (tr) * 1998-02-20 1999-09-21 Osman Altuntas Elektrikli fan ünitesinin panjurlarini açip kapamaya yarayan merkazkaç regülatörü.
US6276895B1 (en) * 1998-10-28 2001-08-21 Angelo Milana Fan with centrifugal shutter mechanism

Also Published As

Publication number Publication date
DE60229217D1 (de) 2008-11-20
ES2314024T3 (es) 2009-03-16
DK1359326T3 (da) 2009-02-09
ATE410600T1 (de) 2008-10-15
EP1359326A1 (de) 2003-11-05
PT1359326E (pt) 2008-12-22

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