EP0841482A2 - Pompe rotative - Google Patents

Pompe rotative Download PDF

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Publication number
EP0841482A2
EP0841482A2 EP97119676A EP97119676A EP0841482A2 EP 0841482 A2 EP0841482 A2 EP 0841482A2 EP 97119676 A EP97119676 A EP 97119676A EP 97119676 A EP97119676 A EP 97119676A EP 0841482 A2 EP0841482 A2 EP 0841482A2
Authority
EP
European Patent Office
Prior art keywords
shafts
rotary
pump according
rotary lobe
lobe 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.)
Granted
Application number
EP97119676A
Other languages
German (de)
English (en)
Other versions
EP0841482A3 (fr
EP0841482B1 (fr
Inventor
Thomas Klingenberg
Andreas Czwaluk
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.)
Netzsch Pumpen and Systeme GmbH
Original Assignee
Netzsch Pumpen and Systeme 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
Application filed by Netzsch Pumpen and Systeme GmbH filed Critical Netzsch Pumpen and Systeme GmbH
Publication of EP0841482A2 publication Critical patent/EP0841482A2/fr
Publication of EP0841482A3 publication Critical patent/EP0841482A3/fr
Application granted granted Critical
Publication of EP0841482B1 publication Critical patent/EP0841482B1/fr
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
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions

Definitions

  • the invention relates to a rotary lobe pump with a pump housing, in which two counter-rotating rotating pistons on two parallel, spaced shafts are held, the shafts from the pump housing led out and stored with their end portions in a gearbox.
  • Rotary lobe pumps of this type which in the two-bladed design are also used as Roots blowers or Roots pumps are available in different designs for a variety of applications Media in use.
  • the invention is mainly aimed at applications in Agricultural engineering soeie in adjacent areas, can of course also in other areas such as the food industry.
  • two bearings are provided on both sides of the pump housing for receiving the shafts carrying the rotary lobes, the shafts being led out of the pump housing on one side.
  • the pistons are driven via a gear unit to be attached to another relevant side of the pump housing, which essentially consisted of a meshing gear pair on the shaft sections made from the pump housing and a respective bearing for the shafts.
  • the object of the invention is to provide a rotary lobe pump in which the disadvantages mentioned no longer occur in the case of the transmission unit in terms of sealing technology is largely decoupled from the pump housing, making these units light can be separated from each other.
  • a generic rotary lobe pump which is thereby is characterized in that two hollow shafts are rotatably mounted in the gear housing, in which the End portions of the shafts are held.
  • the gear housing is preferably detachable with a flange-like connection Pump housing held.
  • the shafts are expediently each with a sealing unit opposite Sealed pump housing, the sealing units being substantially cylindrical Have outer surfaces so that they in one or the other axial direction in the Pump housing can be installed or removed.
  • the sealing units are preferably designed as exchangeable sealing cassettes.
  • the sealing units may be one with a lubricant have filled barrier chamber.
  • the barrier chamber can be overpressured responsive sensor to detect leaks.
  • the hollow shafts preferably extend in the axial direction up to Sealing units on the pump housing, so that the supporting effect of the hollow shafts in the As a rule, they are more rigid than the shafts themselves and are optimally used.
  • the hollow shafts can each have two radial bearings and an additional one if used as a drive helical gear pair is selected, with an axial bearing in the gear housing be stored.
  • the end sections of the shafts with feather keys are preferably non-rotatable and axially displaceable held in the hollow shafts. This results in an extremely simple assembly of the Units.
  • the hollow shafts are expediently provided with two sealing units each Sealed gear housing, it is advantageous if the space between the Sealing unit in the pump housing and the adjacent sealing unit in the Gearbox is in connection with the environment, so that any escaping Lubricant and pump medium can flow away as freely as possible (without pressure).
  • the rotary pistons preferably have a plurality arranged one next to the other in the axial direction Piston segments.
  • the end portion of the shafts on the rotary piston side can be used to receive a radial bearing Supporting the shaft end against the pump housing can be designed so If necessary, a radial bearing can be retrofitted without much effort.
  • the rotary lobe pump according to the invention in one shows side view, which is partially designed as a sectional view, the Cutting plane contains the longitudinal axes of the two shafts of the pump, as from the following description is still clear.
  • the rotary lobe pump consists of the actual pump housing 1 and the one on it a flange connection 2 flanged gear housing 3.
  • the essentially cylindrical pump housing 1 is made in one piece in the present embodiment and closed at the end with an end wall 1a and a lid 1b, while the Gear housing 3 is composed of two half-shell-like halves, the Division level with the sectional plane of the representation of FIG. 1 corresponds and with Screws 4 are held together.
  • the purpose of the gear housing is to support the two shafts 5, 6 of the rotary lobe pump and the driving force introduced via the pin 7 from the shaft 6 in part onto the shaft 5 to transmit, the shafts with a pair of gears, one of which is designated 8 is coupled to one another and can be driven in opposite directions.
  • bearings, sealing elements, etc. are only for shaft 5 in shown individually, of course corresponding elements for the shaft 6th available.
  • the shafts are not mounted directly in corresponding bearings in the gear housing, but a hollow shaft 9 is provided for receiving a shaft, which in turn is rotatably mounted in the gear housing with roller bearings 10.
  • Axial bearings 11 absorb forces that are introduced by helical gears 8.
  • sealing units in the form of shaft sealing rings 12 and 13 are provided, which run on interchangeable liners 14 and 15.
  • the gears 8 are held on the hollow shafts 9 in a rotationally fixed manner with feather keys. A defined axial position of the arrangement is ensured with circlips 16 and 17.
  • FIG. 1 further shows, the shafts 5 and 6 with parallel keys 18 and corresponding ones in the Hollow shafts 9 formed longitudinal grooves rotatably and axially displaceable in the hollow shafts 9 held.
  • the shafts 5 and 6 carry on their part opposite the gear housing one or more rotary piston segments 19 each, which are connected to a feather key connection 20 are rotatably and axially displaceable on the shafts.
  • the pump segments point in this embodiment, a cast core 19a and a rubber jacket 19b, the segments in certain areas of application, for example in the Food industry, can also be made entirely of stainless steel.
  • Interchangeable Wear discs 31 are located on the end of the pump housing between the rotary pistons and End wall 1a or cover 1b.
  • the shafts 5 and 6 are in the area of the end wall 1 a of the pump housing sealed with a sealing unit, the structure of which is more clearly shown in detail in FIG. 2 emerges and which is also referred to below as a sealing cartridge 26.
  • the sealing of the rotating shafts against the overpressure inside the pump housing takes place via a sealing surface between a cross-section firmly clamped on the shaft L-shaped sealing ring 22 and an elastically pressed over an O-ring 23 Wear ring 21.
  • the O-ring 23 is in turn not directly supported on Pump housing 1, but is located within another, housing-like ring 25th
  • a shaft sealing ring 27 Adjacent to this seal arrangement is additional within the seal cartridge 26 a shaft sealing ring 27 is provided, which in turn runs on a wear ring 24. Between the seal formed by the parts 21 and 22 and the shaft sealing ring 27 there is an intermediate space 28, which is referred to as a blocking chamber, and which has a suitable one Lubricant is filled and to detect leaks in the seal 21 and 22 serves.
  • the blocking chamber 28 is connected to a pressure sensor via radial bores 37 connected. If there is a leak in the area of parts 21 and 22, the pressure in the Barrier chamber, which is registered by the sensor and triggers a corresponding signal.
  • the sealing cassette 26 has a cylindrical shape on the outside and is held on the transmission side with a fastening ring 29 and screws 30 on the end face of the pump housing. On the pump side, the sealing cassette bears against the wear plate 31. Due to the cylindrical shape of the sealing cassette, depending on the type of maintenance work to be carried out, it can be pulled out either after removing the fastening ring 29 towards the gear housing or after removing the wear washer 31 towards the pump housing.
  • the Seal cartridge can of course also be held with a press fit in the end wall, so that e.g. B. when removing the cassette from the pump side, the wear plate 31, the then must be provided with a corresponding axial recess, in place could remain.
  • a space 32 which is in communication with the environment and the purpose of which is to prevent, on the one hand, possibly from the Lubricant escaping from the gearbox housing into the pump housing or on the other hand Any pump fluid emerging from the pump housing is pressed into the gear housing can be.
  • the inventive holder of the shafts in hollow shafts in the above Wise Man has many advantages.
  • the maintenance of the pump becomes significant Simplified, since either gearbox or pump housing can be easily removed from the respective unit can be removed without the bearing, sealing rings, etc. being pulled off the shafts Need to become.
  • the gear housing after loosening the nut 34 and the gear housing on the screws 36 holding the pump housing are removed, after which maintenance work on the gearbox, on its seals or on the Sealing cassette 26 can be made.
  • individual Rotary lobe fragments can be exchanged or checked.
  • Another advantage of the hollow shafts according to the invention is that of overhung bearings Waves, as is the case in the illustrated embodiment, in that a additional support against unwanted deflection of the cantilever Shaft sections due to the length of the radial bearing 10 Hollow shafts is reached. Without the arrangement of a hollow shaft, the self-supporting Length of the waves begin immediately after the radial bearing 10, which is larger Deflection would result.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Details Of Reciprocating Pumps (AREA)
EP97119676A 1996-11-11 1997-11-11 Pompe rotative Expired - Lifetime EP0841482B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19646469A DE19646469C2 (de) 1996-11-11 1996-11-11 Drehkolbenpumpe
DE19646469 1996-11-11

Publications (3)

Publication Number Publication Date
EP0841482A2 true EP0841482A2 (fr) 1998-05-13
EP0841482A3 EP0841482A3 (fr) 1999-06-02
EP0841482B1 EP0841482B1 (fr) 2003-05-07

Family

ID=7811261

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97119676A Expired - Lifetime EP0841482B1 (fr) 1996-11-11 1997-11-11 Pompe rotative

Country Status (4)

Country Link
EP (1) EP0841482B1 (fr)
AT (1) ATE239870T1 (fr)
DE (2) DE19646469C2 (fr)
ES (1) ES2196238T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1043502A3 (fr) * 1999-04-08 2002-05-15 Nakakin Co., Ltd. Pompe rotative
EP1329635A1 (fr) * 1999-04-08 2003-07-23 Nakakin Co., Ltd. Pompe rotative
DE202010015437U1 (de) * 2010-11-16 2012-02-17 Hugo Vogelsang Maschinenbau Gmbh Drehkolbenpumpe mit Hohlkolben

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012213735A1 (de) * 2012-08-02 2014-02-27 Robert Bosch Gmbh Pumpe, insbesondere Verdrängerpumpe

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2642808A (en) * 1948-05-17 1953-06-23 Waterous Co Sanitary pump
JPS55148993A (en) * 1979-05-10 1980-11-19 Toko Sangyo Kk Cover device for pump
DE3307790A1 (de) * 1982-07-29 1984-02-09 Linde Ag, 6200 Wiesbaden Aggregat aus zwei zahnringpumpen
GB9004594D0 (en) * 1990-02-28 1990-04-25 Apv Crepaco Pumps Ltd Improvements in or relating to rotary pumps
NL9000785A (nl) * 1990-04-03 1991-11-01 Boer B V De Verdringerpomp.
JP2563865Y2 (ja) * 1992-06-29 1998-02-25 株式会社ナカキン ロータリーポンプ
DE4401688C2 (de) * 1994-01-21 1996-02-08 Alois Boerger Rotorpumpe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1043502A3 (fr) * 1999-04-08 2002-05-15 Nakakin Co., Ltd. Pompe rotative
EP1329635A1 (fr) * 1999-04-08 2003-07-23 Nakakin Co., Ltd. Pompe rotative
DE202010015437U1 (de) * 2010-11-16 2012-02-17 Hugo Vogelsang Maschinenbau Gmbh Drehkolbenpumpe mit Hohlkolben

Also Published As

Publication number Publication date
EP0841482A3 (fr) 1999-06-02
ES2196238T3 (es) 2003-12-16
DE19646469C2 (de) 1999-06-24
ATE239870T1 (de) 2003-05-15
DE19646469A1 (de) 1998-05-20
EP0841482B1 (fr) 2003-05-07
DE59710027D1 (de) 2003-06-12

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