EP0153452B1 - Ventilateur axial - Google Patents

Ventilateur axial Download PDF

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Publication number
EP0153452B1
EP0153452B1 EP84113344A EP84113344A EP0153452B1 EP 0153452 B1 EP0153452 B1 EP 0153452B1 EP 84113344 A EP84113344 A EP 84113344A EP 84113344 A EP84113344 A EP 84113344A EP 0153452 B1 EP0153452 B1 EP 0153452B1
Authority
EP
European Patent Office
Prior art keywords
root
blade
sealing
axial flow
rings
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
Application number
EP84113344A
Other languages
German (de)
English (en)
Other versions
EP0153452A1 (fr
Inventor
Walter Heingärtner
Werner Kolb
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.)
Turbo-Lufttechnik GmbH
Original Assignee
Turbo-Lufttechnik 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6226610&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0153452(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Turbo-Lufttechnik GmbH filed Critical Turbo-Lufttechnik GmbH
Priority to AT84113344T priority Critical patent/ATE31106T1/de
Publication of EP0153452A1 publication Critical patent/EP0153452A1/fr
Application granted granted Critical
Publication of EP0153452B1 publication Critical patent/EP0153452B1/fr
Expired 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
    • F04D29/08—Sealings
    • 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

Definitions

  • the invention relates to an axial fan with the features of the preamble of claim 1.
  • the hub of the impeller and the blades must be made from a corrosion-resistant workpiece or coated with a corrosion-resistant coating.
  • a particularly critical point is the corrosion-resistant design of the adjustable blades of the impeller and the sealing at the point of attachment of the adjustable blades on the impeller.
  • a turbomachine with adjustable blades known from EP-A-0 104 343 (falling under Article 54 (3)), these are held in the hub by means of screws which engage in the blade root from the inside of the hub.
  • a seal for a turbomachine with adjustable blades is known, which consists of a sealing ring. The sealing ring is pressed against a ring fixed to the blade root via springs arranged radially in the hub. The blades are attached by screws from the outside of the hub.
  • Both known turbomachines are not made of a corrosion-resistant material or provided with a corrosion-resistant coating.
  • the invention has for its object to improve the corrosion protection at the attachment point of the blades in a generic axial fan. This object is achieved by the features of claim 1. Advantageous embodiments of the invention are specified in the subclaims.
  • the axial fan contains a running gear that has a shaft 1 and an impeller 2.
  • the impeller 2 is provided on its end face with a removable cover 3.
  • blades 4 On the circumference of the impeller 2 blades 4 are arranged, which are adjustable to adapt the blower to the desired operating points.
  • the vanes 4 are guided in bores of the impeller 2 and connected to spars 5 arranged in the interior of the impeller 2.
  • the spars 5 are supported by roller bearings 6 in a support ring 7 connected to the shaft 1.
  • an adjusting lever 8 At the lower end of each spar 5, an adjusting lever 8 is attached, which engages in grooves of an adjusting disc 9, which is connected to an adjusting cylinder, not shown.
  • the hub of the impeller 2 is made of a corrosion-resistant material for protection against corrosion by components in the pumped medium (Fig. 4).
  • the hub can also be coated with a corrosion-resistant, non-metallic coating 10, e.g. B. a soft or hard rubber, be coated (Fig. 2, 3, 5).
  • the coating 10 projects into the bore for receiving the foot 11 of the wing 4.
  • the vanes 4 can consist of a corrosion-resistant stainless steel (FIGS. 2, 4) or a non-corrosion-resistant steel, in which case the vanes 4, like the impeller 2, are coated with a corrosion-resistant coating 10 (FIGS. 3, 5).
  • the coating 10 covers part of the foot 11 of the wing 4.
  • screws 12 which are provided with an Allen head 13. These screws 12 are inserted from the inside of the impeller 2 through a flange 14 of the spar 5 into the foot 11 of the wing 4. The screws 12 are accessible from the front side of the impeller 2 after the removable cover 3 has been removed.
  • the foot 11 of the wing 4 is surrounded by several sealing rings 15, 16, 17.
  • the inner sealing ring 17 is designed as a flat ring. Press against this sealing ring 17 several evenly distributed resilient elements, for. B. in the form of coil springs 18 which are received by a guide bush 19. A preload is introduced into the sealing rings 15, 16, 17 via the helical springs 18.
  • the tension path of the coil springs 18 is so large that, in the event of unavoidable displacements in the wing spar arrangement due to the centrifugal forces occurring when the impeller rotates, the sealing rings 15, 16, 17 always remain pretensioned, since the pretension force can only change insignificantly.
  • the sealing rings 15, 16 have recesses into which star-shaped, deformable rings 20 (quad rings) are inserted. These rings 20 hold the sealing rings 15, 16 in place and prevent them from occurring Relative movements between the sealing rings 15, 16, 17 and the coating 10 of the impeller 2.
  • the sealing rings 15, 16 have sealing lips 22, 23.
  • the sealing lip 22 of the radially outer sealing ring 15 lies against the foot 11 of the wing 4 between the sliding surface 21 and the outer circumference of the impeller 2.
  • an axial groove is also cut into the foot 11 of the wing 4.
  • Flat piston rings 24 made of stainless steel are inserted into this groove.
  • the sealing lip 22 of the sealing ring 15 and the flat wooden rings 24 serve to keep coarse dirt away from the sliding surface 21.
  • the sealing lip 23 of the sealing ring 16 is molded onto the radially outer edge of this sealing ring 16 and points obliquely inwards, the sealing lip 23 abutting the foot 11 of the wing 4. Under the action of the centrifugal force and the grease filled in there, the sealing lip 23 is additionally pressed against the foot 11 of the wing 4.
  • FIG. 3 which has wings 4 coated with a coating 10, largely corresponds to the embodiment according to FIG. 2.
  • a static O-ring seal 25 and a metallic sealing liner 26 are provided for a perfect sealing of the transition of the coating 10 of the wing 4 into the uncoated part of the wing 4.
  • the metallic seal liner 26 is inserted within the bore of the impeller 2 between a projecting part of the flange 14 of the spar 5 and the foot 11 of the wing 4.
  • the sliding surface 21 is here also outside of the coating 10, namely between the seal bushing 26 and the outer sealing ring 15.
  • the O-ring seal 25 applied to the coating 10 of the wing 4 is formed by the projecting flange 14 of the spar 5 and by the Seal sleeve 26 is biased, whereby a perfect seal between the coating 10 and the remaining, uncoated part of the wing 4 is achieved.
  • compressed O-rings 29, 30 made of an elastic polymer are used as resilient elements for pressing on the sealing rings 27, 28 used there.
  • the 0-rings 29, 30 rest on the hub of the impeller 2. They are preloaded by screwing the screw 12 into the wing 4.
  • the O-rings 29, 30 have the task of sealing the wings 4 against the impeller 2 and the sealing rings 27, 28 against rotation to secure.
  • sealing rings 27, 28 are arranged one behind the other, which have diameters of different sizes.
  • Each sealing ring 27, 28 is pressed on by its own O-ring 29, 30.
  • the sealing surface of the sealing rings 27, 28 is opposite a metallic surface of the foot 11 of the wing 4 as a sliding surface 21.
  • a further seal in the form of a grooved ring 31 is provided in front of the sealing rings 27, 28.
  • the groove of the grooved ring 31 faces the inside of the impeller 2.
  • the edges of the groove ring 31 delimiting the groove lie against the wall of the bore of the hub and against the foot 11 of the wing 4 or against the seal bushing 26 when the impeller 2 rotates under the influence of the centrifugal force.

Landscapes

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

Claims (12)

1. Ventiliteur axial équipé d'une roue (2) présentant des alésages à travers lesquels sont montées des aubes à pas variable (4), l'étanchéité du montage étant assurée par des joints (15, 16, 17, 27, 28), le pied (11) de chaque aube (4) se raccordant par des vis (12) a un pivot (5) disposé à l'intérieur de la roue, caractérisé en ce que les vis (12) sont introduites à partir de l'intérieur, par une bride (14) du pivot (5), dans le pied (11) de l'aube (4), les joints (15, 16, 17, 27, 28) sont mis en précontrainte par des éléments élastiques agissant radialement par rapport à la roue (2) et pressés contre une portée de glissement (21) du pied (11) de l'aube (4) orientée perpendiculairement à la direction dans laquelle agissent les éléments élistiques, et la course de précontrainte des éléments élastiques est supérieure au déplacement engendré par l'effet centrifuge au voisinage des joints (15, 16. 17, 27, 28).
2. Ventilateur axial selon la revendication 1, caractérisé en ce que l'alésage du moyeu de la roue (2) et/ou une partie du pied d'aube (11) engagé dans l'alésage sont recouverts d'un revêtement (10) non métallique et la portée d'etanchéité des joints (15, 16, 17, 27, 28) repose sur une portée de glissement métallique (21) du pied (11) de l'aube (4).
3. Ventilateur axial selon la revendication 1 ou 2, caractérisé en ce que le joint (15) situé radialement à l'extérieur est doté d'une lèvre d'étanchéité (22) dépassant vers l'extérieur la surface d'étanchéité (21), et venant s'appliquer contre le pied (11) de l'aube (4).
4. Ventilateur axial selon l'une ou plusieurs des revendications 1 à 3, caractérisé en ce qu'une rainure est prévue dans le pied (11) de l'aube (4), rainure s'orientant radialement vers l'extérieur par rapport à la portée d'étanchéité (21) et dans laquelle sont mis en place des segments de piston plats (24) en acier special.
5. Ventilateur axial selon l'une ou plusieurs des revendications 1 à 4, caractérisé en ce que les éléments élastiques sont des ressorts hélicoïdaux (18).
6. Ventilateur axial selon l'une ou plusieurs des revendications 1 à 4, caractérisé en ce que les éléments élastiques sont des joints toriques (29,30) soumis à la compression.
7. Ventilateur axial selon la revendication 6, caractérisé en ce que plusieurs des joints (27,28) soumis chacun à la poussée d'un joint torique compressé (29,30), sont disposés les uns derriere les autres dans le sens radial.
8. Ventilateur axial selon l'une ou plusieurs des revendications 1 à 7, caractérisé en ce qu'un joint en U (31) dont la rainure est orientée vers l'intérieur de la roue (2) est disposé radialement vers l'intérieur par rapport aux joints (15, 16, 17, 27, 28), et les bords de la rainure de joint en U (31) se positionnent vers l'extérieur sous l'effet de la force centrifuge.
5. Ventilateur axial selon l'une ou plusieurs des revendications 1 à 4, caractérisé en ce que les éléments élastiques sont des ressorts hélicoidaux (18).
6. Ventilateur axial selon l'une ou plusieurs des revendications 1 à 4, caractérisé en ce que les éléments élastiques sont des joints toriques (29,30) soumis à la compression.
7. Ventilateur axial selon la revendication 6, caractérisé en ce que plusieurs des joints (27,28) soumis chacun à la poussée d'un joint torique compressé (29,30,) sont disposés les uns derriere les autres dans le sens radial.
8. Ventilateur axial selon l'une ou piusieurs des revendications 1 à 7, caractérisé en ce qu'un joint en U (31) dont la rainure est orientée vers l'interieur de la roue (2) est disposé radialement vers l'intérieur par rapport aux joints (15, 16, 17, 27, 28), et les bords de la rainure de joint en U (31) se positionnent vers l'extérieur sous l'effet de la force centrifuge.
EP84113344A 1984-02-03 1984-11-06 Ventilateur axial Expired EP0153452B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84113344T ATE31106T1 (de) 1984-02-03 1984-11-06 Axialgeblaese.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3403674A DE3403674C1 (de) 1984-02-03 1984-02-03 Axialgeblaese
DE3403674 1984-02-03

Publications (2)

Publication Number Publication Date
EP0153452A1 EP0153452A1 (fr) 1985-09-04
EP0153452B1 true EP0153452B1 (fr) 1987-11-25

Family

ID=6226610

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84113344A Expired EP0153452B1 (fr) 1984-02-03 1984-11-06 Ventilateur axial

Country Status (8)

Country Link
EP (1) EP0153452B1 (fr)
JP (1) JPS6134399A (fr)
AT (1) ATE31106T1 (fr)
CA (1) CA1282752C (fr)
DE (2) DE3403674C1 (fr)
ES (1) ES8704593A1 (fr)
MX (1) MX161116A (fr)
ZA (1) ZA849876B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106337838B (zh) * 2016-10-21 2018-04-13 珠海格力电器股份有限公司 离心压缩机及具有其的空调器
CN112283159B (zh) * 2020-11-20 2025-01-24 西安热工研究院有限公司 一种动调风机转子叶片叶根密封结构

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1635315A (en) * 1925-10-19 1927-07-12 Carl F Ehinger Automobile fan
CH220098A (de) * 1941-08-05 1942-03-15 Escher Wyss Maschf Ag Dichtung an Verstellpropellern, bei denen Flügel und Flügelschaft lösbar miteinander verbunden sind.
NL68178C (nl) * 1943-09-15 1951-07-16 Englesson John Elov Afdichtingsring van elastisch materiaal voor het afdichten van twee ten opzichte van elkaar draaibare vlakken.
CH264087A (de) * 1947-06-18 1949-09-30 Nydqvist & Holm Ab Dichtungsvorrichtung für in einer mit Flüssigkeit gefüllten Nabe drehbar gelagerte Flügelzapfen.
GB651569A (en) * 1949-11-24 1951-04-04 Aerex Australia Company Improvements in hubs of screw fan impellers
US3037458A (en) * 1957-04-15 1962-06-05 Goulds Pumps Glass pump
SE301597B (fr) * 1966-07-05 1968-06-10 Karlstad Mekaniska Ab
AT340032B (de) * 1975-01-11 1977-11-25 Voith Getriebe Kg Axialgeblase mit stufenlos verstellbaren laufradschaufeln
DE3233078C1 (de) * 1982-09-06 1984-03-29 Balcke-Dürr AG, 4030 Ratingen Stroemungsmaschine

Also Published As

Publication number Publication date
MX161116A (es) 1990-07-31
JPS6134399A (ja) 1986-02-18
CA1282752C (fr) 1991-04-09
ES540017A0 (es) 1987-04-01
ATE31106T1 (de) 1987-12-15
DE3403674C1 (de) 1985-06-05
ES8704593A1 (es) 1987-04-01
DE3467796D1 (en) 1988-01-07
EP0153452A1 (fr) 1985-09-04
ZA849876B (en) 1985-12-24

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