EP2055963A2 - Ventilateur doté d'ailettes - Google Patents

Ventilateur doté d'ailettes Download PDF

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Publication number
EP2055963A2
EP2055963A2 EP08166172A EP08166172A EP2055963A2 EP 2055963 A2 EP2055963 A2 EP 2055963A2 EP 08166172 A EP08166172 A EP 08166172A EP 08166172 A EP08166172 A EP 08166172A EP 2055963 A2 EP2055963 A2 EP 2055963A2
Authority
EP
European Patent Office
Prior art keywords
fan
fan blades
shaft
blades
hub part
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.)
Withdrawn
Application number
EP08166172A
Other languages
German (de)
English (en)
Other versions
EP2055963A3 (fr
Inventor
Hartmut Walter
Andreas Bethge
Hartmut Rauch
Jochen Schmidt
Gunnar Schubert
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.)
Siemens AG
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP2055963A2 publication Critical patent/EP2055963A2/fr
Publication of EP2055963A3 publication Critical patent/EP2055963A3/fr
Withdrawn legal-status Critical Current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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/64—Mounting; Assembling; Disassembling of axial pumps
    • F04D29/644—Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
    • F04D29/646—Mounting or removal of fans
    • 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

Definitions

  • the invention relates to a fan with attachable to a hub fan blades.
  • Fan blades in particular on rotating turbomachines, are exposed to extreme centrifugal force during operation.
  • the used fan blades should be adjustable in angle, in order to change the air flow.
  • the previous fan have fan blades, which are screwed with a threaded foot in the shaft, which has the disadvantage that changes the fan outer diameter at an angular displacement of the fan blades. This requires elaborate reworking and elaborate rebalancing of the fan. In addition, it is disadvantageous that the fan blades on otherwise finished rotor can be assembled and disassembled extremely expensive.
  • the distance to the adjacent fan blades must be at least half of a fan blade width, so that when disassembling a fan blade that can be turned out of its threaded hole. That is, the distance of the individual fan blades is clearly defined by this type of attachment in the fan hub.
  • the centrifugal stress of the fan blades can also be compensated by suitable, in particular high-strength materials.
  • suitable, in particular high-strength materials In order to avoid the static charge while the fan blades are provided with conductive coating such as paint. This coating dissolves in operation due to aging or mechanical stress.
  • the present invention seeks to provide a fan with individual fan blades, which has grown on the one hand, the enormous centrifugal stresses in the operation, especially in turbomachinery with speeds greater than 3600 revolutions per minute, in a simple manner to assemble or disassemble is, as well as having sufficient electrical conductivity to dissipate the static charge during operation.
  • a fan having individual attachable to a shaft or a hub part fan blades, the fan is particularly suitable for use in turbomachinery with speeds from 3600 revolutions per minute, with the individual fan blades in the form of a bayonet connection Anti-rotation are arranged on the shaft or the hub part.
  • the fan blades By attaching the fan blades in the form of a bayonet mount with anti-rotation both the centrifugal forces during operation of the turbomachine, as well as the predetermined angular adjustments of the fan blades are mastered.
  • the fan blades are easy to assemble and disassemble due to the bayonet attachment to the hub portion of the rotor of the turbomachine. It is thus ensured even with a comparatively narrow position of the fan blades on the hub part or the shaft replacement of a fan blade.
  • the fan outer diameter is not changed by an angular displacement of the fan blades, i. the outer circumference of the entire fan does not change due to an angle adjustment of the fan blades.
  • the rotation of a fan blade is adjusted by various latching angular positions of the bayonet closure, which is ensured by corresponding elements of the fan base and recess of the hub or an insertion in the hub.
  • a diaphragm spring presses the fan foot against the latching in particular at a standstill Elements, so that no involuntary adjustment, in particular of the angle can take place.
  • the avoidance of rotation of a fan blade is ensured by a locking screw or fixing screw.
  • the fan blades of the fan therefore have a composite material between a conductive and high-strength material. This allows the static charges on the foot and the bayonet connection directly or via the hub part, on the shaft derived
  • the composite material on a mesh or a chemical compound.
  • a material braid that contains at least carbon fibers and Kevlar fibers has proved to be particularly effective.
  • the mesh of the fan blade is located in a resin matrix with conductive material, in particular with conductive nanoparticles or soot.
  • FIG. 1 shows a schematic representation of a rotor of a turbomachine not shown with its arranged on a front side fan 1.
  • the fan 1 has a plurality of circumferentially arranged fan blades 2, which are arranged on a hub part 5 of the rotor.
  • the hub part 5 is directly connected to the shaft 3 of the turbomachine.
  • the self-ventilated turbomachine is provided with fan blades 2, which are alternatively positioned individually on the shaft 3.
  • Each individual fan blade 2 of the self-ventilated turbomachine is positioned on the shaft 3 or the rotor or on the hub part 5 via a bayonet connection 20 according to the invention.
  • the recesses for receiving the fan blades 2, more precisely, the respective foot parts 4 of the fan blades 2, are directly in the shaft 3 or on a separate hub part 5, which in turn is placed on the shaft 3.
  • a bayonet closure or bayonet connection 20 is generally referred to a device for comparatively easily detachable connecting two parts in the direction of its longitudinal axis.
  • the one part which is pushed over the other, has a longitudinal slot at the end of which attaches a short transverse slot at right angles.
  • the other part on the other hand, has a counter element, e.g. a respect to the circumference in sections elevation, which is introduced via the longitudinal slot in the transverse slot, and thus causes a firm connection.
  • connection of the two parts shaft 3 or hub part 5 with the fan blades 2 thus takes place via a plug-in rotary movement.
  • the elevations 9 on the foot part 4 may be dish-shaped or conical.
  • both parts are pressed against each other by a rotational movement.
  • the bayonet closure works in this case like a section thread.
  • a catch or a locking screw 7 or fixing screw is provided, which is screwed into the shaft 3 or the hub part 5.
  • the catch is realized for example by a serrated surface in the region of the transverse slot 14 of the rotary joint.
  • a plate spring 13 is provided in the recess into which the foot part 4 is inserted and twisted, so that the bead 9 is positioned in the transverse slot.
  • the plate spring 13 now presses radially against the fan base and thus causes an exact positioning.
  • in conjunction with the serrated surface of the horizontally extending transverse slot results in a sufficient anti-rotation, the effect of which increases at high speeds of the turbomachine due to the centrifugal force 11.
  • the hub part 5 is directly connected to the shaft 3 of the turbomachine, so that there is a self-ventilated turbomachine.
  • the fan blades 2 are relatively narrow staggered on the shaft or the hub part 5.
  • the bayonet connection according to the invention is applied.
  • the fan blade 2 is arranged and positioned in a suitable foot part of the hub of the fan 1 or the shaft by a plug-in rotary movement, as already explained in more detail above.
  • a catch or locking screw 7 the fan blade 2 is positioned exactly in its angular position, so that a predeterminable axial air flow is ensured by the turbo machine by the positioning of all fan blades.
  • fan blades 2 are electrostatically charged at these speeds.
  • conductive coatings are no longer sufficient, as i.a. due to the strong centrifugal forces 11, the coating detaches from the fan blades or flakes off.
  • a braided material is at least carbon fiber and Kevlar fiber.
  • the braided material 16 has carbon fibers 16 for electrical conductivity and Kevlar fibers 15 for strength. These fibers 15, 16 thus form not only the fan blade 8 but the entire fan blade 2, so that the fibers 15, 16 are already drawn into the foot part 4 during production of the fan blade 2. For an electrical voltage 12 is guaranteed at any time.
  • the mesh of the fan blade 2 is arranged in a resin matrix 18 with conductive material, in particular conductive nanoparticles 17 or soot.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP08166172.0A 2007-11-02 2008-10-09 Ventilateur doté d'ailettes Withdrawn EP2055963A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200710052450 DE102007052450A1 (de) 2007-11-02 2007-11-02 Lüfter mit Lüfterflügel

Publications (2)

Publication Number Publication Date
EP2055963A2 true EP2055963A2 (fr) 2009-05-06
EP2055963A3 EP2055963A3 (fr) 2013-07-03

Family

ID=40130848

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08166172.0A Withdrawn EP2055963A3 (fr) 2007-11-02 2008-10-09 Ventilateur doté d'ailettes

Country Status (2)

Country Link
EP (1) EP2055963A3 (fr)
DE (1) DE102007052450A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106194830A (zh) * 2016-08-31 2016-12-07 株洲联诚集团有限责任公司 一种叶片角度可调的轴流风机叶轮
CN106704268A (zh) * 2016-12-25 2017-05-24 中船重工电机科技股份有限公司 装配式风扇的叶片装配角度快速调节装置
CN109477494A (zh) * 2016-07-14 2019-03-15 巴鲁法蒂股份公司 用于冷却机器/车辆的冷却流体的风扇的预组装的叶片和装配有所述叶片的风扇
CN115163557A (zh) * 2022-08-18 2022-10-11 安徽朗迪叶轮机械有限公司 一种高效稳定的轴流风叶

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112112828B (zh) * 2020-09-09 2021-12-03 贵州电网有限责任公司 一种变电站配电室通风装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3597111A (en) * 1969-07-18 1971-08-03 Preco Inc Blade mount and stall control for vane axial compressors
DK463183D0 (da) * 1983-10-07 1983-10-07 Nordisk Ventilator Skovl med skovlaksel til et aksialblaeserhjul
AU592312B2 (en) * 1985-09-30 1990-01-11 Lionel Fraser Bulcraig Improvements in and relating to impellers
ATE329139T1 (de) * 2002-08-16 2006-06-15 Siemens Ag Befestigungssystem

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109477494A (zh) * 2016-07-14 2019-03-15 巴鲁法蒂股份公司 用于冷却机器/车辆的冷却流体的风扇的预组装的叶片和装配有所述叶片的风扇
CN106194830A (zh) * 2016-08-31 2016-12-07 株洲联诚集团有限责任公司 一种叶片角度可调的轴流风机叶轮
CN106194830B (zh) * 2016-08-31 2018-09-28 湖南联诚轨道装备有限公司 一种叶片角度可调的轴流风机叶轮
CN106704268A (zh) * 2016-12-25 2017-05-24 中船重工电机科技股份有限公司 装配式风扇的叶片装配角度快速调节装置
CN115163557A (zh) * 2022-08-18 2022-10-11 安徽朗迪叶轮机械有限公司 一种高效稳定的轴流风叶

Also Published As

Publication number Publication date
EP2055963A3 (fr) 2013-07-03
DE102007052450A1 (de) 2009-05-07

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