EP3118456B1 - Rotor en plastique pour pompe a vide - Google Patents

Rotor en plastique pour pompe a vide Download PDF

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Publication number
EP3118456B1
EP3118456B1 EP16173480.1A EP16173480A EP3118456B1 EP 3118456 B1 EP3118456 B1 EP 3118456B1 EP 16173480 A EP16173480 A EP 16173480A EP 3118456 B1 EP3118456 B1 EP 3118456B1
Authority
EP
European Patent Office
Prior art keywords
rotor
bearing
base body
bearing zone
pump
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
EP16173480.1A
Other languages
German (de)
English (en)
Other versions
EP3118456A1 (fr
Inventor
Hans-Peter Ott
Bernd Hess
Martin Thoma
Thomas Gulde
Torsten Helle
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.)
Joma Polytec GmbH
Original Assignee
Joma Polytec GmbH
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Filing date
Publication date
Application filed by Joma Polytec GmbH filed Critical Joma Polytec GmbH
Publication of EP3118456A1 publication Critical patent/EP3118456A1/fr
Application granted granted Critical
Publication of EP3118456B1 publication Critical patent/EP3118456B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F04C29/0078—Fixing rotors on shafts, e.g. by clamping together hub and shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C18/3448—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member with axially movable vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/08—Rotary pistons
    • F01C21/0809—Construction of vanes or vane holders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C18/3446—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along more than one line or surface
    • F04C18/3447—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along more than one line or surface the vanes having the form of rollers, slippers or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
    • F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F04C29/005—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F04C29/005—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F04C29/0071—Couplings between rotors and input or output shafts acting by interengaging or mating parts, i.e. positive coupling of rotor and shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/20—Rotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/40—Electric motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber

Definitions

  • the invention relates to a rotor for a vane pump, in particular for a vacuum pump, with a rotationally drivable base body made of a plastic which rotates about an axis of rotation during operation, the base body having a guide section for slidably receiving a pump vane and the base body in the direction of the axis of rotation flanked by a first bearing point and a second bearing point.
  • the invention also relates to a vane pump, in particular a vacuum pump comprising such a rotor.
  • Rotors for vane pumps are widely known from the prior art.
  • Such rotors usually have a circular-cylindrical guide section with at least one blade shaft for sliding accommodation of a pump blade, with circular-cylindrical bearing points being provided on both sides of the guide section, which are received in corresponding bearing recesses of a pump housing, so that the rotor is rotatably mounted in the pump housing.
  • In the area of the guide section such rotors have a larger outer diameter than in the area of the bearing points, so that a shaft shoulder is provided between the guide section and the bearing points, which can also serve as a stop in the bearing recesses of the pump housing.
  • Such a rotor is, for example, from the DE 10 2012 210 048 A1 famous.
  • Rotors for vane pumps are often made of metal, with these rotors being cast from lost molds. In addition, however, it is also known to produce rotors for vane pumps using the plastic injection molding process. In the case of these rotors made of plastic, however, it has been shown that a solid design of the base body of the rotors can lead to the formation of cavities. In order to avoid the formation of cavities, it is known from the prior art to provide recesses in the base body in the annular shaft shoulder of the guide section, which has a larger diameter than the bearing points. However, such recesses can only be implemented in comparatively short rotors with a comparatively large diameter or a comparatively large shaft shoulder. In the case of comparatively long rotors with a comparatively small diameter, however, this procedure is problematic, since the differences in the diameters of Guide section and bearing points are not suitable for the formation of sufficiently large recesses.
  • the object of the invention is to provide a plastic rotor for a vane pump, in particular for a vacuum pump, in which the formation of cavities can be prevented easily and reliably.
  • This object is achieved by a rotor for a vane pump with the features of claim 1.
  • the rotor is characterized in that the second bearing point has bearing sections which are spaced apart from one another and lie on a circular path arranged concentrically to the axis of rotation. This segmented design of the second bearing point has proven to be particularly advantageous, since an arrangement of recesses can be made possible not only in the area of the annular shaft shoulder.
  • the second bearing point has two radially opposite circular arc sections, which each have a bearing section radially on the outside. It is particularly preferred if the circular arc sections are each delimited by two planes arranged parallel to the blade shaft of the guide section and the bearing sections arranged concentrically to the circular path.
  • the second bearing point has at least one, preferably two, web sections between the circular arc sections, which have a bearing section at their free end.
  • the base body has recesses starting from the second bearing point and extending along the axis of rotation.
  • the recesses are cylindrical or almost cylindrical in such a way that an injection molding tool can be shaped easily. It has also proven to be particularly advantageous if the recesses extend radially into the second bearing point.
  • the basic body of the rotor has a blade shaft in the area of the guide section, in which a blade can be accommodated so that it can slide between two levels, with the guide section preferably being of circular-cylindrical design.
  • the second bearing point is of cylindrical design. Since the bearing sections are arranged on a circular path, an envelope of the second bearing point is circular-cylindrical when the rotor is in operation, ie when rotating about the axis of rotation. It is also particularly preferred if the first bearing point is of circular-cylindrical design. Thus, the first and the second bearing point for mounting the rotor in circular-cylindrical recesses of a pump housing are included.
  • a further advantageous embodiment of the rotor provides that the rotor has a bore which is arranged concentrically to the axis of rotation and which opens into the first bearing point at the front and that the guide section has a vane shaft, the bore being fluidically connected to the vane shaft.
  • a particularly advantageous development of the rotor provides that a metal insert, which has a torque transmission section, is inserted in a form-fitting manner into the base body in the area of the first bearing point. It is particularly preferred if the insert is encapsulated by the plastic of the base body.
  • the insert part is arranged concentrically to the axis of rotation.
  • the insert is cylindrical and has teeth on its outer side. It is also particularly preferred if the base body has a toothing has corresponding counter teeth.
  • this counter-toothing of the base body is produced by overmoulding the insert.
  • the toothing is designed in a dovetail-like manner in such a way that the teeth of the toothing widen radially outward.
  • This dovetail-like widening of the teeth of the toothing is advantageous since the base body made of plastic cannot spread open during operation of the pump rotor. Rather, the base body can be pulled onto the metal insert.
  • the insert is made of sintered steel, steel or brass.
  • the torque transmission section is a hexagon socket or a dihedron.
  • FIG 1 shows a pump rotor 10 for a vane pump not shown in the figures, in particular for a vacuum pump. Corresponding components and elements are identified in the figures with the corresponding reference symbols.
  • the pump rotor 10 has a base body 12 made of a plastic, which rotates about an axis of rotation 14 during operation.
  • the base body 12 has a guide portion 16 with a blade well 18 for slidably receiving a pump blade.
  • the vane well 18 is delimited by two parallel planes 20, 22 which provide a guide for the pump vane.
  • the guide section 16 is flanked by a first bearing point 24 and a second bearing point 26, with the guide section 16 having a larger diameter than the first bearing point 24, so that a shaft shoulder 28 is arranged between the first bearing point 24 and the guide section 16 is.
  • the first bearing point 24 is circular-cylindrical.
  • the first bearing point 24 and the second bearing point 26 are designed in such a way that they can be accommodated in circular-cylindrical bearing mounts of a pump housing, not shown.
  • the base body 12 can be driven in rotation and for this purpose has a metal insert 30 made of a sintered metal or brass in the area of the first bearing point 24 , which is arranged concentrically to the axis of rotation 14 .
  • the metallic insert 30 is shown in the exploded view figure 2 clearly visible.
  • the insert 30 has a torque transmission section 32 in the form of a hexagon that Figure 5 and 6 is clearly visible. By providing the torque transmission section 32, a rotational movement of a drive unit such as a belt drive or an electric motor can be transmitted to the pump rotor 10.
  • the insert 30 In order to transmit torque from the insert 30 to the base body 12, the insert 30 is inserted into the base body 12 in a form-fitting manner.
  • the insert 30 is encapsulated by the plastic of the base body.
  • the insert 30 has for torque transmission to the base body 12 on its shell side 34 in the Figures 3 , 5 and 6 clearly recognizable teeth 36 on.
  • the base body 12 has a corresponding toothing 36 with the counter-toothing 38, which is also in the Figures 3 , 5 and 6 is clearly visible.
  • figure 5 shows a section through the pump rotor 10 in a plane perpendicular to the axis of rotation 14 of the pump rotor 10, wherein figure 6 a detailed view VI of the section according to FIG figure 5 displays.
  • the toothing 36 of the insert part 30 is designed in the manner of a dovetail and has a large number of teeth 40 .
  • the toothing 36 is designed in a dovetail-like manner in such a way that the teeth 40 of the toothing 36 widen radially outward, i.e. perpendicularly to the axis of rotation 14 .
  • the flanks 42 of the teeth 40 enclose an angle 46 with a tooth center plane 44 .
  • This dovetail-like widening of the teeth 40 is advantageous because, during operation of the pump rotor 10, the base body 12 made of plastic cannot spread open.
  • figure 3 shows an oblique view of the pump rotor 10 according to FIG Figures 1 and 2 looking at a second bearing point 26.
  • figure 4 shows a section through the pump rotor 10 through the plane IV according to FIG figure 3 , whereby figure 7 a side view of the pump rotor 10 looking at the second bearing point 26 in the direction of the in figure 3 arrow 48 shown.
  • the second bearing point 26 has bearing sections 50 which are spaced apart from one another and lie on a circular path arranged concentrically with respect to the axis of rotation 14 .
  • the second bearing point 26 is while, as in figure 3 is clearly visible, cylindrical. If the pump rotor 10 now rotates in the direction of the arrow 52 during operation, an envelope of the second bearing point 26 is formed, which is circular-cylindrical.
  • the second bearing point 26 has two radially opposite circular arc sections 54 which each have a bearing section 50 radially on the outside.
  • the circular arc sections 54 are delimited by two planes 56, 58 arranged parallel to the blade shaft 18 and by the bearing sections 50 arranged concentrically to the circular path.
  • the circular arc sections 54 are shown in FIG figure 7 clearly visible.
  • Two web sections 60, 62 are arranged between the circular arc sections 54 and also have a bearing section 50 at their free end.
  • a further radial guidance of the second bearing point 26 can be made possible in addition to the bearing sections 50 of the circular arc sections 54 .
  • the second bearing point 26 with the circular arc sections 54 and the web sections 60, 62 is consequently formed in a segmented manner, since the bearing sections 50 lying on the circular path are spaced apart from one another.
  • This segmented design of the second bearing point 26 has proven to be particularly advantageous since recesses 64 can be arranged in the base body 12 between the circular arc sections 54 and the web sections 60, 62.
  • the recesses 64 extend as in section according to FIG figure 4 is clearly recognizable, almost up to the shaft shoulder 28 in the area of the first bearing point 24 and are designed almost cylindrically, with draft angles not visible in the figures being provided, which enable the molding of an injection mold.
  • recesses 66 are also arranged in the circular arc sections 54 of the second bearing point 26 , but these extend only through the first bearing point 26 .
  • the base body 12 can be injection molded with largely constant wall thicknesses and the formation of cavities can be largely or almost largely avoided.
  • the pump rotor 10 has a blind hole 68 arranged concentrically to the axis of rotation 14, which opens into the first bearing point 24 on the front side and is fluidically connected to the vane shaft 18 in such a way that an oil supply is provided for lubricating a pump vane that can be arranged slidably in the vane shaft 18 can be.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Claims (11)

  1. Rotor (10) pour une pompe à palettes, en particulier pour une pompe à vide, avec un corps de base (12) pouvant être entraîné en rotation composé d'un plastique, qui tourne autour d'un axe de rotation (14) lors du fonctionnement, dans lequel le corps de base (12) présente une partie de guidage (16) pour la réception mobile de façon coulissante d'une palette de pompe et dans lequel le corps de base (12) en direction de l'axe de rotation (14) est flanqué d'un premier point d'appui (24) et d'un deuxième point d'appui (26), dans lequel le deuxième point d'appui (26) présente des parties d'appui (50) espacées les unes des autres, situées sur une trajectoire circulaire disposée de manière concentrique par rapport à l'axe de rotation (14), et dans lequel le deuxième point d'appui (26) présente deux parties d'arc de cercle (54) opposées radialement l'une à l'autre, qui présentent radialement à l'extérieur respectivement une partie d'appui (50), caractérisé en ce que le deuxième point d'appui (26) présente entre les parties d'arc de cercle (54) respectivement au moins une, de préférence deux parties d'élément jointif (60, 62), qui présentent une partie d'appui (50) à leur extrémité libre.
  2. Rotor (10) selon la revendication 1, caractérisé en ce que le corps de base (12) présente des évidements (64, 66) partant du deuxième point d'appui (26), s'étendant le long de l'axe de rotation (14).
  3. Rotor (10) selon au moins l'une des revendications précédentes, caractérisé en ce que le deuxième point d'appui (26) est réalisé de manière cylindrique.
  4. Rotor (10) selon au moins l'une des revendications précédentes, caractérisé en ce que le rotor (10) présente un trou (68) disposé de manière concentrique par rapport à l'axe de rotation (14), qui débouche frontalement dans le premier point d'appui (24) et que la partie de guidage (16) présente un puits de pale (18), dans lequel le trou (68) est relié fluidiquement au puits de pale (18).
  5. Rotor (10) selon au moins l'une des revendications précédentes, caractérisé en ce qu'une pièce d'insertion (30) métallique, qui présente une partie de transmission de couple (32), est introduite par coopération de formes dans le corps de base (12) dans la zone du premier point d'appui (24).
  6. Rotor (10) selon la revendication 5, caractérisé en ce que la pièce d'insertion (30) est disposée de manière concentrique par rapport à l'axe de rotation (14).
  7. Rotor (10) selon la revendication 5 ou 6, caractérisé en ce que la pièce d'insertion (30) est réalisée de manière cylindrique et présente sur sa face d'enveloppe (34) une denture (36).
  8. Rotor (10) selon la revendication 7, caractérisé en ce que la denture (36) est réalisée à la façon d'une queue d'aronde, de telle sorte que les dents (40) de la denture (36) s'élargissent radialement vers l'extérieur.
  9. Rotor (10) selon au moins l'une des revendications 5 à 8, caractérisé en ce que la pièce d'insertion (30) est fabriquée à partir d'acier fritté, à partir d'acier ou à partir de laiton.
  10. Rotor (10) selon au moins l'une des revendications 5 à 9, caractérisé en ce que la partie de transmission de couple (32) est une empreinte à six pans creux ou un dièdre.
  11. Pompe à palettes, en particulier pompe à vide, comprenant un rotor (10) selon au moins l'une des revendications précédentes.
EP16173480.1A 2015-07-13 2016-06-08 Rotor en plastique pour pompe a vide Active EP3118456B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015213099.1A DE102015213099B3 (de) 2015-07-13 2015-07-13 Kunststoffrotor für Vakuumpumpe

Publications (2)

Publication Number Publication Date
EP3118456A1 EP3118456A1 (fr) 2017-01-18
EP3118456B1 true EP3118456B1 (fr) 2022-02-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP16173480.1A Active EP3118456B1 (fr) 2015-07-13 2016-06-08 Rotor en plastique pour pompe a vide

Country Status (4)

Country Link
US (1) US10138888B2 (fr)
EP (1) EP3118456B1 (fr)
CN (1) CN106351838B (fr)
DE (1) DE102015213099B3 (fr)

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US20170016445A1 (en) 2017-01-19
US10138888B2 (en) 2018-11-27
CN106351838B (zh) 2019-02-19
EP3118456A1 (fr) 2017-01-18
DE102015213099B3 (de) 2016-08-04

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