EP1967739B1 - Vorrichtung zum hydraulischen Verstellen der Laufschaufeln eines Laufrades eines Axialventilators - Google Patents

Vorrichtung zum hydraulischen Verstellen der Laufschaufeln eines Laufrades eines Axialventilators Download PDF

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Publication number
EP1967739B1
EP1967739B1 EP08002781A EP08002781A EP1967739B1 EP 1967739 B1 EP1967739 B1 EP 1967739B1 EP 08002781 A EP08002781 A EP 08002781A EP 08002781 A EP08002781 A EP 08002781A EP 1967739 B1 EP1967739 B1 EP 1967739B1
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EP
European Patent Office
Prior art keywords
valve
valves
control
oil
way
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP08002781A
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German (de)
English (en)
French (fr)
Other versions
EP1967739A3 (de
EP1967739A2 (de
Inventor
André Annebique
Jörg Schmidt
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.)
TLT Turbo GmbH
Original Assignee
TLT Turbo GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by TLT Turbo GmbH filed Critical TLT Turbo GmbH
Priority to PL08002781T priority Critical patent/PL1967739T3/pl
Publication of EP1967739A2 publication Critical patent/EP1967739A2/de
Publication of EP1967739A3 publication Critical patent/EP1967739A3/de
Application granted granted Critical
Publication of EP1967739B1 publication Critical patent/EP1967739B1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • 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
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/34—Blade mountings
    • F04D29/36—Blade mountings adjustable
    • F04D29/362—Blade mountings adjustable during rotation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves

Definitions

  • the invention relates to a device for the hydraulic adjustment of the blades of an impeller of an axial fan with the features of the preamble of claim 1.
  • Modern axial fans are controllable working machines that convert mechanical energy into flow energy.
  • the control of the axial fans via the speed or the angle of attack of the blades. If the blade position can be changed during operation, the blade must be mounted on a mounted shaft, the spar.
  • the change of the blade position is usually done hydraulically.
  • a hydraulic adjusting device is attached to the impeller of the axial fan.
  • Such an adjusting device consists essentially of a hydraulic adjusting cylinder, which rotates with the fan speed, and a stationary oil transition piece, to which the oil supply lines are connected.
  • From the DE 196 00 660 A1 is a hydraulically reversible Vestellpropeller unit for air, land and / or water vehicles with a propeller with at least two leaves known whose blade angle by means of a control unit (controller) is adjustable. There is no mechanical or electrical connection between the rotating propeller and the stationary control unit for the blade angle control.
  • a movable, adjustable and biased by springs stop is intended for the starting position (small increase). The stop is for adjusting the blade angle to the brake position (reverse) by means of a Hochdruckhydraulikfluids overcome and adjustable to a mechanical stop for the braking position (reverse) to produce a negative thrust.
  • the invention has for its object to make the generic device for adjusting blades during fan operation so that even with a power failure, the blade position in the previous last position can be maintained until another network control unit takes over the position control of the adjustment by a network switching.
  • a redundant control of the adjustment is provided.
  • the arrangement of the poppet valves upstream of the associated 4-way valves ensures that always only a 4-way valve performs the control of the hydraulic adjustment and a hydraulic short circuit between the parallel arranged redundant 4-way valves is excluded.
  • By the execution of the poppet valves as closing by spring force valves is additionally ensured that in case of failure of the respective power supply of the parallel drive units shut off the supply and return line to both the hydraulic adjustment and to the respective 4-way valve, whereby the respective blade position is held until the power supply is applied again.
  • FIG. 1 an impeller 1 of an axial fan is shown, which is equipped on its circumference with a plurality of blades 2, of which a blade is indicated.
  • the impeller is mounted on a shaft 18, which may be installed in both a separate main bearing and a drive motor.
  • the blades 2 are adjustable to adapt the axial fan to the various operating points about its longitudinal axis.
  • the blades 2 carrying Holm 3 is rotatably mounted in a support ring 4 of the impeller 1.
  • the impeller 1 is provided with an adjusting device for adjusting the rotor blades 2.
  • a cranked adjusting lever 5 is attached to each spar 3, which in a on the circumference in the Fig. 1a and 1b shown adjusting plate 17 mounted groove is guided.
  • the adjusting plate 17 is connected to a piston rod 8, on which a piston 7 is fixed.
  • the piston 7 is located within an adjusting cylinder 6.
  • the piston rod 8 with the piston 7 and the adjusting plate 17 are slidably disposed along the axis of the axial fan and rotate at the same speed as the impeller 1 and the adjusting 6th
  • a check valve 16 is additionally arranged in the oil transition piece, its importance will be discussed later.
  • test connection 20 permits the connection of test equipment to the supply line P by means of a quick coupling with a seat valve.
  • the supply line P is divided equally into two parallel branches P1 and P2 on the test side.
  • a manual shut-off valve 21, 31 is installed in the two branches P1 and P2 of the supply line P, which is preferably designed as a ball valve.
  • the check valves 21, 31 serve to be able to shut off the corresponding pressure leading supply line P to these valves in the case of replacement of subsequently arranged further valves.
  • the ventilator side of the shut-off valves 21, 31 each have a test port 22, 32 is provided.
  • Redundant is in each case the electromagnetically actuated 4-way valve 23, 33 installed in one of the branches P1 and P2 of the supply line P and one of the branches T1 and T2 of the return line T.
  • the 4-way valves 23, 33 are preferably designed as 4/3-way proportional control valves. On the fan side, the branches A1 and B1 of the control oil lines A, B are connected to the 4-way valve 23, while the branches A2 and B2 of the control oil lines A, B are guided on the fan side to the 4-way valve 33.
  • the seat valves 24, 25, 34, 35 are preferably designed as 2/2-way cone seat valves.
  • the seat valves 24, 25 serve as shut-off devices for the 4-way valve 23, and the seat valves 34, 35 serve as shut-off devices for the 4-way valve 33.
  • the seat valves 24, 25, 34, 35 are each electrically connected to the associated 4-way valves 23 , 33 coupled.
  • the built in the branches P1 / A1 and T1 / B1 valves namely 4-way valve 23 and seat valves 24, 25, and built in the branches P2 / A2 and T2 / B2 valves, namely 4-way valve 33 and seat valves 34, 35 are applied to different voltage sources.
  • the 4-way valves 23, 33 and the seat valves 24, 25, 34, 35 are each provided with a light-emitting diode 26 which is connected so that it lights up as long as the relevant valve is in operation.
  • a manual shut-off valve 27, 28, 37, 38 are installed after each of these, which is preferably designed as a ball valve, thus the replacement during operation with the redundant Unit without fluid pressure losses possible.
  • the adjusting cylinder 6 can be supplied by the branches P1 / A1 / T1 / B1 or by the branches P2 / A2 / T2 / B2 with the predetermined amounts of fluid, thereby realizing the desired adjustment.
  • the redundant control of the adjusting cylinder 6 is thus possible via either a 4-way valve 23 or the other 4-way valve 33.
  • the poppet valves 24, 25, 34, 35 close at voltage interruption spring actuated. Therefore, it can be switched without interrupting the operation between the two 4-way valves 23, 33 by changing the power supply. During the switching time no fluid flows to the adjusting cylinder 6 or from this.
  • a pressure limiting valve 29, 39 can be installed in the return lines T1, T2 leading to the tank connection.
  • a pressure relief valve 29, 39 is advantageous if in the control oil line B immediately before the port 15 of the oil transition piece 13 of the second chamber 12 of the adjusting 6, a check valve 16 is arranged.
  • the arranged check valve 16 is held by the pressure in the control oil line A in the open position. In case of failure or interruption of the pressure oil supply, the check valve 16 moves into the closed position. In the closed position of the check valve 16, the adjusting cylinder 6 remains in its previously assumed position. Thus, the connected via the piston rod 8 and the adjusting plate 17 and the spar 3 blade 2 can not turn, but remains in the assumed position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP08002781A 2007-03-09 2008-02-15 Vorrichtung zum hydraulischen Verstellen der Laufschaufeln eines Laufrades eines Axialventilators Active EP1967739B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08002781T PL1967739T3 (pl) 2007-03-09 2008-02-15 Urządzenie do hydraulicznego przestawiania łopatek wirnika wentylatora osiowego

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007011990.0A DE102007011990B4 (de) 2007-03-09 2007-03-09 Vorrichtung zum hydraulischen Verstellen der Laufschaufeln eines Laufrades eines Axialventilators

Publications (3)

Publication Number Publication Date
EP1967739A2 EP1967739A2 (de) 2008-09-10
EP1967739A3 EP1967739A3 (de) 2009-07-01
EP1967739B1 true EP1967739B1 (de) 2010-11-17

Family

ID=39339914

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08002781A Active EP1967739B1 (de) 2007-03-09 2008-02-15 Vorrichtung zum hydraulischen Verstellen der Laufschaufeln eines Laufrades eines Axialventilators

Country Status (10)

Country Link
US (1) US7971519B2 (da)
EP (1) EP1967739B1 (da)
KR (1) KR101383926B1 (da)
CN (1) CN101275585B (da)
AT (1) ATE488702T1 (da)
DE (2) DE102007011990B4 (da)
DK (1) DK1967739T3 (da)
ES (1) ES2356490T3 (da)
PL (1) PL1967739T3 (da)
RU (1) RU2450168C2 (da)

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FR2945512B1 (fr) * 2009-05-15 2012-08-24 Snecma Helice non carenee a pales a calage variable pour une turbomachine
US9068556B2 (en) * 2010-11-26 2015-06-30 Vestas Wind Systems A/S Pilot circuitry for controlling the emergency feathering of a wind turbine
CN102536660B (zh) * 2010-11-26 2014-10-29 维斯塔斯风力系统有限公司 具有液压叶片变桨系统的风轮机
FR2978953B1 (fr) * 2011-08-08 2013-09-20 Snecma Systeme de commande hydraulique de l'orientation de pales de soufflante
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CN107313967B (zh) * 2017-07-13 2024-01-30 浙江双阳风机有限公司 一种对旋式动叶可调轴流风机
CN107654404A (zh) * 2017-08-16 2018-02-02 张元杰 一种动叶可调轴流风机液压控制执行器
CN110873083B (zh) * 2018-09-03 2021-07-27 江苏科技大学 一种双阀并联的电液伺服系统及其控制方法
CN113027870B (zh) * 2021-03-17 2022-10-18 四川百纳科技有限责任公司 一种全地形装甲车独立散热系统及其控制方法
CN113280021A (zh) * 2021-05-11 2021-08-20 成都正山机械制造有限公司 一种集成一体的比例阀控制方法
CN113339354B (zh) * 2021-08-02 2021-11-09 中国电建集团透平科技有限公司 一种轴流风机动叶调节装置
CN113404746B (zh) * 2021-08-19 2021-11-09 中国电建集团透平科技有限公司 一种轴流风机叶片控制系统及方法

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Also Published As

Publication number Publication date
RU2008108952A (ru) 2009-09-20
US7971519B2 (en) 2011-07-05
CN101275585A (zh) 2008-10-01
RU2450168C2 (ru) 2012-05-10
DK1967739T3 (da) 2011-03-07
PL1967739T3 (pl) 2011-04-29
KR101383926B1 (ko) 2014-04-10
US20080219846A1 (en) 2008-09-11
DE502008001791D1 (de) 2010-12-30
KR20080082910A (ko) 2008-09-12
DE102007011990A1 (de) 2008-09-11
CN101275585B (zh) 2011-11-16
ES2356490T3 (es) 2011-04-08
ATE488702T1 (de) 2010-12-15
EP1967739A3 (de) 2009-07-01
EP1967739A2 (de) 2008-09-10
DE102007011990B4 (de) 2019-01-10

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