EP0043047A2 - Mélangeur ayant deux organes de mélange tournant dans des directions opposées autour du même axe géométrique - Google Patents

Mélangeur ayant deux organes de mélange tournant dans des directions opposées autour du même axe géométrique Download PDF

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Publication number
EP0043047A2
EP0043047A2 EP81104722A EP81104722A EP0043047A2 EP 0043047 A2 EP0043047 A2 EP 0043047A2 EP 81104722 A EP81104722 A EP 81104722A EP 81104722 A EP81104722 A EP 81104722A EP 0043047 A2 EP0043047 A2 EP 0043047A2
Authority
EP
European Patent Office
Prior art keywords
agitator
shaft
housing
mechanical seal
stirring
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Withdrawn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
EP81104722A
Other languages
German (de)
English (en)
Other versions
EP0043047A3 (fr
Inventor
Dieter Kupka
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0043047A2 publication Critical patent/EP0043047A2/fr
Publication of EP0043047A3 publication Critical patent/EP0043047A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
    • B01F35/32—Driving arrangements
    • B01F35/323—Driving arrangements for vertical stirrer shafts
    • B01F35/3231—Driving several stirrer shafts, e.g. about the same axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/84—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with two or more stirrers rotating at different speeds or in opposite directions about the same axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D1/00—Burners for combustion of pulverulent fuel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S277/00—Seal for a joint or juncture
    • Y10S277/927—Seal including fluid pressure differential feature

Definitions

  • the invention relates to an agitator for flowable agitated material that can be placed tightly on a vessel, preferably a pressure vessel, with two agitating elements driven in opposite directions rotating about the same geometrical axis, of which: one encompasses the inside as the outside and an outer agitating shaft surrounding the inner agitating shaft forming hollow shaft is arranged and wherein the two stirring. organs adapted for the application, generating different stirring material flows trained stirring blades, and with a housing within which the stirring shaft of inner agitator against the hollow shaft carrying the outer agitator and these are sealed against the bearing housing.
  • agitators of this type as e.g. are known from the brochure P-6.2 of Chemienorm GmbH, 6570 Kirn, so far only gland packing has been used for sealing between the inner agitator shaft and the counter-rotating outer agitator shaft and between this and stationary housing parts.
  • two agitator gears were provided, one for the inner and one for the outer agitator shaft. These two gears were arranged one above the other; the upper gear housing was supported with a first lantern on the lower one and this with a second lantern on the boiler.
  • the housing of a gland packing used to seal the inner agitator shaft against the outer gland packing used had to rotate together with the outer agitator shaft, together with the gland packing necessary to tighten its packing rings.
  • the invention is therefore based on the object of making agitators of the type mentioned working with two counter-rotating agitators by using mechanical seals also suitable for working at higher boiler pressures, in a design that is as universally applicable as possible.
  • a further development of the invention is that the mechanical seal wear parts are placed directly on the agitator shaft or inserted into it, that is, without the interposition of protective sleeves. In this way it is possible to keep the diameter of the double double-acting mechanical seal with its nested sets of wear parts smaller than would be possible using the known protective sleeves between the shafts and the wear part sets.
  • a usable solution to the subtask of supplying the mechanical seal with its nested sets of wear parts with cooling, locking and lubricating medium can be achieved by having the sections of the inner stirring shaft driving the inner stirring element up to the area of the mechanical seal with a central branching in the area of the mechanical seal, the supply of locking, cooling and lubricating media to the wear parts of the mechanical seal serving channel are provided, and that on the uppermost section. of the inner agitator shaft, a stationary feed head is then placed tightly in a known manner, that the Wear parts of the mechanical seal receiving inner and outer spaces are connected to each other by channels and that in front of the outer housing space in the mechanical seal housing seen return channel connects.
  • the inventive use of the double-acting mechanical seal also requires. that the overall structure of the agitator takes into account the possibility of making the double-acting mechanical seal easily removable for the purpose of replacing its wear parts sets or for other repairs.
  • This object is achieved in a development of the invention in that the mechanical seal housing is placed on the container and above it a separation point of both the inner and the outer stirring shaft is provided, that the area of the mechanical seal and the separation points is provided by a support intermediate housing placed on the container is bridged and that on this intermediate housing a closed unit forming output shafts for both the inner and for the outer stirrer shaft. With a housing is placed.
  • the separation point for the outer agitator shaft forms a circumferential intermediate housing, which is formed by a flange at the lower end of the upper outer agitator shaft section and a flange sleeve placed on the lower outer agitator shaft part and spacer bolts connecting these, while the Separation point for the sections of the inner agitator shaft is formed by a flange of the upper section and a flange sleeve which is non-rotatably attached to the central section of the inner agitator shaft with a tongue and groove connection.
  • the mechanical seal with its housing, a section of the inner stirrer shaft that it encompasses and a section of the outer stirrer shaft that surrounds it, with a mounting sleeve assigned to it, is designed as a jointly removable block.
  • the removed block can easily be replaced by a new block or dismantle further in a special workshop, in which case all parts can be treated appropriately.
  • a separate gear has been used to drive each of two counter-rotating stirrer shafts without the use of mechanical seals.
  • This design of a gear housing with two counter-rotating output shafts serves for universal use of the agitator system which can be seen as a whole.
  • the drive sources can be of very different types depending on the application, the gears themselves can also be designed in very different ways if only the modular housing to be used has two counter-rotating output shafts.
  • the gear block allows the use of spur gears, bevel spur gears, worm spur gears, V-belt bevel spur gears, V-belt spur gears and hydraulic spur gears.
  • the drive can be introduced horizontally or vertically into the gear housing, while the two counter-rotating output shafts are usually led out of the gear housing vertically downwards.
  • a unit-forming agitator gear block is provided in a gear housing 20, which is on a supporting intermediate housing, namely an agitator lantern 21, which in turn is formed on the upper end wall, generally designed as a lid, of the material to be stirred receiving container 37 is placed.
  • a drive motor 1 is flanged to the housing 20 of the gear block, which is required as an electric motor in the example shown.
  • the container 37 is cylindrical and in the example shown has a conical bottom 43, which, however, could also be more pointed or blunt than shown, or could be replaced by a flat or curved bottom.
  • the uppermost section 9 of an inner agitator shaft and the uppermost section 10 of an outer agitator shaft surrounding it as a hollow shaft protrude downward from the gear housing 20.
  • the uppermost section 9 of the inner agitator shaft forms a shoulder 62, on which rests a gearwheel 8 driving the inner agitator shaft, which is rotatably placed on the uppermost shaft section 9.
  • the uppermost section 9 of the inner agitator shaft forms a flange 23 which is flanged by means of threaded screws 54 to a flange sleeve 25 which is coupled by means of a spring 61 to the upper end of the next lower section 45 of the inner agitator shaft, the lower end of which is one Flange 63 forms.
  • a flange 64 of the lowermost section 44 of the inner agitator shaft is screwed, which forms an internal agitator in the container 37 with the agitator blades 38 carried by it.
  • the outer agitator shaft is composed as follows.
  • the stirring blades 38 of the inner stirring member carry between the stirring blades 34 of the outer stirring member; the agitator blades 34 and 38 are set with opposite inclinations.
  • Floor wipers 42 are attached to the lower end of the test frame 33, the design and course of which are adapted to the floor 43 of the container 37.
  • a central support bearing 39 is held by the profile frame 33, into which a bearing bush 40 is inserted, in which the lower end of the lower section 44 of the inner agitator shaft is mounted.
  • the bearing bush 40 is expediently designed to be self-lubricating and consists, for example, of PTFE.
  • the lantern 21 has or forms one or more, e.g. two diametrically opposite lateral access openings.
  • the housing 28 of a double-acting mechanical seal described in more detail below with reference to FIG. 7 is placed on the container 37.
  • the flange 22 and the flange sleeve 26 with the spacer bolts 24 running therebetween form a circumferential lantern with service openings, through which the coupling of the upper sections 9 and 45 formed from the flange 23 and the flange sleeve 25 passes the inner agitator shaft can be solved.
  • This coupling thus represents a separation point within the inner agitator shaft.
  • a stationary feed head 13 is attached to the upper end of the uppermost section 9 of the inner stirring shaft, the purpose of which is explained in more detail below in the description of the double-acting mechanical seal arranged inside the housing 28.
  • the design of the gear block accommodated in the housing 20 permits numerous modifications.
  • the drive source 1 can be a three-phase motor or a hydraulic motor with or without a control gear.
  • the motor 1 drives a bevel gear stage 3 via a bearing housing 2 that can be flanged on and off.
  • the pinion 5 drives the outer agitator shaft in one direction of rotation via a wheel 65 which is fixed on the upper hollow shaft section 10, while the upper section 9 of the inner agitator shaft is driven by the pinion 6 is driven via an intermediate wheel 7 and a gear 8 in the opposite direction of rotation. Since the gear 8 has a smaller diameter than the gear 65, the inner stirring shaft is driven faster than the outer one.
  • the shafts, not designated, of the spur gear stages located in the gear housing 20 are mounted in roller bearings and are lubricated by circulating lubrication or grease packing.
  • the opposite direction of rotation of the inner and outer stirring shaft is indicated in Fig. 2 below by the arrows 11 and 12.
  • the transmission block shown in FIGS. 1 and 2 is modified in the example according to FIG. 3 in that the motor 1 is replaced by a foot motor 15 with a V-belt set 14 which drives the transmission drive shaft. In this way an additional reduction is created.
  • a V-belt drive 16 is switched on in the drive of the inner agitator shaft. By changing the wheels of this V-belt drive, the speed of the inner agitator shaft and thus the ratio of the speeds of the inner and outer agitator shaft can be changed; the V-belt drive 16 can also be replaced by a continuously variable V-belt transmission.
  • the previously described drive stages are omitted, but the gear housing 20 remains unchanged.
  • the motor 1 is replaced by a motor drive 17, which drives the intermediate wheel 7 directly, from which here via the wheel 6 and the pinion 5 arranged on its shaft, the drive of the gear 65 fixed on the hollow shaft 10 (see FIG. 2) is done.
  • the speed of the drive 17 is less reduced than in the previously described types of transmission block.
  • the drive bevel gear stage 1, 2, 3 of the embodiment according to FIG. 2 is omitted.
  • a continuously variable drive 18 drives the inner agitator shaft and a special, additional regulating drive 19 drives the hollow shaft 10 that forms the upper end of the outer agitator shaft.
  • the output speeds and their ratio are infinitely adjustable.
  • An inner and an outer mechanical seal are accommodated in the mechanical seal housing 28.
  • the inner one consists of the wear part set 47 and the stationary slide rings 48; it seals between the inner agitator shaft part 45 and the outer agitator shaft part 55.
  • the outer mechanical seal consists of the wear part set 49 and the stationary slide rings -50 and seals between the outer stirrer shaft 55 and the stationary housing 28.
  • the wear part sets are directly on the shaft or inserted into the shaft.
  • the upper part 9 of the inner agitator shaft with the flange 23 and the middle part 45 of the inner agitator shaft connected to it via the flange sleeve 25 contain a central line extending into the area of the mechanical seal and branching in the area of the mechanical seal, the supply line for blocking, cooling - And lubricating media to the wear parts of the mechanical seal serving channel 53. This is fed to the medium to be fed in via the feed head 13.
  • the hollow shaft section 55 and a mounting sleeve 51 inserted into it are provided with openings, namely slots or bores 56, so that the medium pumped in via the channel 53 can be passed through the spaces accommodating the two sets of wear parts of the mechanical seal parts. They are discharged through a return channel 46 provided in the housing 28.
  • the hollow shaft section 55 of the outer agitator shaft is guided by means of a floating bearing 29, the section 45 of the inner agitator shaft by means of a floating bearing 27.
  • the flange sleeve 25 holds the bearing 27 on the agitator shaft section 45.
  • O-rings 52 are arranged on the agitator shaft section 45 between the latter and the inner wear part set 47 of the mechanical seal on both sides of the branches of the channel, since the feed pressure for such media is approximately 2 bar above the boiler pressure - are maintained.
  • the sliding rings 48 rotating with the section 55 of the outer stirring shaft are held in their position by a circlip 66 and a flange ring 36.
  • a mounting slot 35 in the mounting sleeve 51 enables the driving screw 57 to be operated, which engages in a groove 58 made in the longitudinal direction of section 45 of the inner agitator shaft and permits adjustment of the set of wear parts 47 in the longitudinal direction of the shaft section 45.
  • the inner wear part set 47 is inserted together with the mounting sleeve 51 into the hollow shaft section 55 of the outer stirring shaft during assembly of the seal; the Monta sleeve 51 is then flanged to the flange 30 of the hollow shaft portion 55 thereof.
  • arrows 59 and 60 indicate the directions of rotation of the stirring blades.
  • Fig. 9 shows the flow effect of a rotating, angularly profiled stirring blade in the direction of arrow 59.
  • FIG. 10 shows the effect of a stirring blade of the same design, rotating in the opposite direction to the stirring element of FIG. 9.
  • angularly profiled stirring blades result in low flow resistances with the best stirring effect, even if the product to be stirred is very viscous.
  • An additional swirling and thus intensive mixing of the material to be stirred results from the fact that suction is produced on the rear side of the stirring blade, which has an angular profile.
  • 9 and 10 are isosceles-angled, the profile shown in Fig. 11 is isosceles-angled.
  • stirrer blade profiles according to FIG. 10 and the profile according to FIG. 12 of U-shaped cross-section proved to be particularly suitable for stirring low-viscosity media.
  • the spacer bolts 24 are loosened so that the connection 22/26 is interrupted; the flange connection 23/25 is also loosened.
  • the entire stirring system with the inner and outer stirring element is then raised through a sufficiently large central opening in the boiler lid to such an extent that the flanges 30, 31 come to lie outside the lid surface. The parts are supported in this raised position. Then the flange connections 30, 31 and 63 and 64 are released. Thereafter, the block extending in the vertical direction from 64 to 25 and enclosing the mechanical seal housing 28 in the radial direction can be lifted out as a whole.
  • the drawings which are only used to explain the construction, do not show in all details the dimensions required for this.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Accessories For Mixers (AREA)
EP81104722A 1980-07-21 1981-06-19 Mélangeur ayant deux organes de mélange tournant dans des directions opposées autour du même axe géométrique Withdrawn EP0043047A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803027567 DE3027567A1 (de) 1980-07-21 1980-07-21 Ruehrwerk mit zwei um dieselbe geometrische achse gegenlaeufig angetriebenen ruehrorganen
DE3027567 1980-07-21

Publications (2)

Publication Number Publication Date
EP0043047A2 true EP0043047A2 (fr) 1982-01-06
EP0043047A3 EP0043047A3 (fr) 1984-05-16

Family

ID=6107706

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81104722A Withdrawn EP0043047A3 (fr) 1980-07-21 1981-06-19 Mélangeur ayant deux organes de mélange tournant dans des directions opposées autour du même axe géométrique

Country Status (5)

Country Link
US (1) US4403868A (fr)
EP (1) EP0043047A3 (fr)
JP (1) JPS5787821A (fr)
DE (1) DE3027567A1 (fr)
IT (1) IT1171396B (fr)

Cited By (14)

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EP0461746A3 (en) * 1990-06-15 1992-12-09 Sumitomo Heavy Industries, Ltd Agitator
RU2163838C2 (ru) * 1999-06-09 2001-03-10 Открытое акционерное общество "Пикалевское объединение "Глинозем" Коническо-цилиндрический аппарат для перемешивания суспензий
DE102008049265A1 (de) * 2008-09-26 2010-04-15 Azo Holding Gmbh Mischer
CN105413567A (zh) * 2015-12-08 2016-03-23 天津海泰环保科技发展有限公司 立式高温搅拌釜
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CN111603987A (zh) * 2020-06-18 2020-09-01 方琬婷 一种单筒容量可自由调节的涂料原料搅拌设备
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EP3733272A4 (fr) * 2017-12-26 2021-12-15 Hiroki Nakamura Dispositif de fabrication d'une suspension

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DE102008049265A1 (de) * 2008-09-26 2010-04-15 Azo Holding Gmbh Mischer
DE102008049265B4 (de) * 2008-09-26 2012-12-13 Azo Holding Gmbh Mischer
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EP3733272A4 (fr) * 2017-12-26 2021-12-15 Hiroki Nakamura Dispositif de fabrication d'une suspension
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CN110812885A (zh) * 2019-11-23 2020-02-21 湖南朝露生物科技有限公司 一种植物提取液萃取装置
CN110898708A (zh) * 2019-11-29 2020-03-24 望江县江华设备制造有限公司 一种同心双轴带刮壁功能的分散机
CN110898710A (zh) * 2019-12-10 2020-03-24 绵阳一康制药有限公司 一种药用高效混合设备
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CN111603987A (zh) * 2020-06-18 2020-09-01 方琬婷 一种单筒容量可自由调节的涂料原料搅拌设备
CN112549292A (zh) * 2020-12-23 2021-03-26 安徽华奇管业有限公司 一种混凝土搅拌加工用环保吸尘设备

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US4403868A (en) 1983-09-13
IT1171396B (it) 1987-06-10
DE3027567A1 (de) 1982-02-25
IT8148921A0 (it) 1981-07-17
JPS5787821A (en) 1982-06-01
EP0043047A3 (fr) 1984-05-16
IT8148921A1 (it) 1983-01-17

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