WO2009012903A2 - Machine pour faire fonctionner un dispositif de vibration interne - Google Patents

Machine pour faire fonctionner un dispositif de vibration interne Download PDF

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Publication number
WO2009012903A2
WO2009012903A2 PCT/EP2008/005688 EP2008005688W WO2009012903A2 WO 2009012903 A2 WO2009012903 A2 WO 2009012903A2 EP 2008005688 W EP2008005688 W EP 2008005688W WO 2009012903 A2 WO2009012903 A2 WO 2009012903A2
Authority
WO
WIPO (PCT)
Prior art keywords
machine according
encapsulation
work machine
electric motor
motor
Prior art date
Application number
PCT/EP2008/005688
Other languages
German (de)
English (en)
Other versions
WO2009012903A3 (fr
Inventor
Michael Steffen
Eva Mahling
Original Assignee
Wacker Construction Equipment Ag
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 Wacker Construction Equipment Ag filed Critical Wacker Construction Equipment Ag
Publication of WO2009012903A2 publication Critical patent/WO2009012903A2/fr
Publication of WO2009012903A3 publication Critical patent/WO2009012903A3/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/06—Solidifying concrete, e.g. by application of vacuum before hardening
    • E04G21/08—Internal vibrators, e.g. needle vibrators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/14—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle
    • H02K9/18—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle wherein the external part of the closed circuit comprises a heat exchanger structurally associated with the machine casing
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans

Definitions

  • the invention relates to a working machine for an internal vibrator, with an accommodated in a housing designed as mecanica motor which is connected via a bending shaft with an imbalance mass provided in a vibrator and this drives.
  • an internal vibrator with a housed in a vibrator housing engine is known.
  • This internal vibrator has an imbalance mass accommodated in a vibrator housing, which is generally bottle-shaped.
  • a longer, tight-fitting protective and support hose is attached to the vibrator housing, in which the cables for the power supply of the electric motor are laid.
  • a switch for switching on and off the electric motor is usually located at the junction of the protective and support hose to a connection cable to which a plug for connection of a voltage source is arranged.
  • Internal vibrators with flexible shaft drive have an electric motor to be supported by the operator, which rotatably drives the imbalance mass in the vibrator housing via a bending shaft. They represent a cost-effective alternative to the internal vibrators with motors integrated in the vibrator housing.
  • Known internal vibrators with flexible shaft drives use high-speed, uncontrolled universal motors with a wound rotor and a brush having a carbon brush.
  • the universal motor requires intensive internal cooling, since above all the rotor represents a large heat source. By means of sucked fresh air, ie by means of a draft cooling, the heat is transported to the outside. In conventional construction, the contact of air and moisture with current-carrying components of the motor is thus inevitable.
  • the disadvantages of the universal motor are that the speed depends on the operating voltage and the connected load.
  • the universal motor is maintenance-intensive; his coals wear out quickly; Furthermore, it is very noisy during operation.
  • the flexural shaft, bearings and other rotating parts are unnecessarily worn during no-load operation.
  • the invention has for its object to improve a working machine for an internal vibrator of the type mentioned so that the disadvantages of the prior art are overcome.
  • the electric motor e.g. a brushless electric motor, formed with a stator and a rotor, wherein the electric motor is protected by an encapsulation.
  • the encapsulation thus ensures that no moisture and dust from the outside can penetrate into the electric motor.
  • the electric motor can be equipped with brushes. But it can also be brushless, with no need for maintenance of the electric motor by the use of a brushless electric motor, so that the enclosure does not need to be opened for maintenance purposes.
  • the enclosure may accordingly form part of a heat exchanger such that at least a portion of the heat from the electric motor is applied via the enclosure to e.g. the environment can be delivered.
  • the encapsulation may at least partially directly radially adjoin a radially outer part of the stator. In this way it is possible to transfer the heat generated in the engine, in particular in the stator, to the encapsulation and to dissipate it from there.
  • the electric motor can be said to be a brushless motor.
  • the encapsulation is suitable for every type of electric motor.
  • the encapsulation may be a hermetic encapsulation. However, small penetrations or holes are permissible in the enclosure, e.g. present at the implementation of an electric cable. Even then, the enclosure may be suitable to protect the electric motor against the ingress of moisture and dust, so that a high degree of protection can be achieved. However, the encapsulation is designed so that no flow of cooling air into the interior of the electric motor can thus go directly to the strator or rotor, because this cooling air flow would inevitably also transport dust or moisture into the electric motor.
  • a cooling circuit in particular a closed cooling circuit for the circulation of a cooling medium is formed within the enclosure.
  • the cooling circuit is embedded in this way in the electric motor itself and passes through at least part of the components of the electric motor, in particular the particularly heat-stressed parts of the electric motor.
  • the cooling medium may be air or an inert gas or other suitable heat transfer medium, e.g. Be oil.
  • a first fan for circulating the cooling medium within the enclosure may be provided within the enclosure.
  • the first fan is accordingly to be arranged in the cooling circuit in order to convey the cooling medium through the cooling circuit.
  • the cooling medium can be added to the particularly high heat-loaded elements of the electric motor heat and heat sinks, for example, the encapsulation surrounding the motor out.
  • at least one fresh air channel for cooling the encapsulation is provided between the encapsulation and an outer wall surrounding the encapsulation at least partially. Fresh air supplied from the environment can thus be conducted past the enclosure via this fresh air duct and heat can be removed from the enclosure to the environment.
  • a second fan with a fan wheel can be arranged in the fresh air duct.
  • the first fan in the cooling circuit and the second fan in the fresh air duct can be mounted together on the rotor shaft of the electric motor and thus driven in rotation by the rotor.
  • the heat conducted by the rotor into the shaft and the shaft end can in turn be dissipated via the fan of the first or the second fan.
  • the shaft end and the fan so far form a heat sink for cooling the rotor.
  • the heat dissipated by the fan of the first fan can then be conducted to the enclosure and transmitted outwardly therefrom, as described above. If the heat is dissipated via the fan of the second fan, it can be discharged directly into the ambient air. Thus, the heat generated in the electric motor can be partially discharged via the encapsulation and partly via the fan wheel carried by the shaft end of the rotor.
  • the electric motor is a sealed magnet motor.
  • the jacket cooling described above can be considered sufficient, since in this case no electrical current flowing through the rotor flows and thus causes no rotor heating. Accordingly, no special cooling of the rotor is required. Only the heat which develops in the stator is to be conducted away from the outer cooling by the encapsulation according to the heat exchanger principle.
  • the internal vibrator has as motor an asynchronous motor with a squirrel-cage rotor, a switched reluctance motor or a capacitor motor.
  • the engine can be controlled by a modern control circuit.
  • the electronic components can be arranged such that they can be cooled by the cooling circuit inside the enclosure. Accordingly, the components should either be flowed around directly by the cooling medium or at least be arranged on a wall, which has been flown by the cooling medium.
  • the heat exchanger which is formed at least partially by the encapsulation, can surround the stator at least radially, in order to ensure reliable heat dissipation.
  • the heat exchanger have a radially inner and a radially outer wall.
  • a rib structure can be formed between the inner and the outer wall, which enlarges the heat transfer surface of the heat exchanger, so that the cooling effect of the heat exchanger can be further improved.
  • the inner wall of the heat exchanger can accordingly form part of the encapsulation and be arranged very close to the stator in order to allow the most direct possible heat transfer.
  • the heat exchanger consists of a material with high thermal conductivity, in particular of aluminum, which was produced in particular in an extruded profile or in a casting process.
  • the inner air circulation circuit can thereby be configured, at least in part, that the stator has stator laminations, which are each broken through by axially extending ventilation openings.
  • the vents are channels that form part of the cooling circuit.
  • the motor can be surrounded by frontal lids with ventilation openings. In this way, an air flow flowing from the outside under the outer housing of the motor penetrates the area between the housing and a wall surrounding the stator.
  • the motor has a, in particular non-contact, sensor for determining the rotational speed and / or position of the rotor.
  • the sensor can be integrated in the motor housing, in particular, be fully poured into this. This allows the motor to be protected against overload, the may be caused for example by the stoppage of the drive shaft or the attachment.
  • the advantages of the above-described internal vibrator according to the invention are that, in contrast to the conventional design, the motor has no direct contact with the outside world.
  • a heat exchanger principle dissipates the heat to the outside.
  • the motor offers optimum operator protection. Also against destruction due to overheating or a short circuit, the engine is well protected.
  • the motor also has a high impact protection tolerance, which means good mechanical stability of the drive unit.
  • the working machine of the vibrator is connected via a releasable coupling in the manner of a quick-change system with a bending shaft and this also connected by a releasable coupling with the unbalanced mass and the receiving this Trottlerge- housing. Even if this clutch should solve and thus the imbalance mass should sink into the liquid concrete, without the possibility to get them back out of the concrete with reasonable effort, so the engine and its drive electronics for the user are not lost.
  • the vibrator according to the invention is modular, its components, ie the motor, the bending shaft and the imbalance mass accommodated in the bottle-shaped vibrator housing, can be exchanged individually.
  • a single drive unit can be combined with a variety of bending waves of different lengths and bottle sizes with different sizes of imbalance masses.
  • the work machine instead of an imbalance mass with another electrically operable terminal, such as a drill or a chisel, connect.
  • FIG. 1 shows a longitudinal section through a brushless electric motor according to the invention serving as a double-cooling machine
  • FIG. 2 shows a longitudinal section through a magnetic motor with a
  • FIG. 3 shows a sectional view of an outer housing (heat exchanger) of an electric motor
  • Fig. 4 is a plan view of a lid with openings for the passage of air for an electric motor according to Fig. 1, and
  • Fig. 5 is a plan view of a stator with openings for the passage of air.
  • a brushless internal rotor electric motor 1 (FIG. 1) comprises a rotor 2 arranged on a shaft 3.
  • the shaft 3 is mounted in ball or roller bearings 4, 5 within housing parts 6, 7.
  • a shaft journal 8 is connected, via which a (not shown here) bending shaft connected to the shaft 3 or is connectable.
  • the rotor 2 On its longitudinal side, the rotor 2 is surrounded radially by a stator 9, whose laminated cores are surrounded by current-carrying windings.
  • the rotor 2 and the stator 9 are jointly enclosed by a cylindrical wall 10 forming part of an encapsulation.
  • a cylindrical wall 10 Between the stator 9 and the wall 10, between the stator 9 and the housing parts 6, 7 in the interior of the stator 9 itself, between the stator 9 and the rotor 2 and in the housing parts 6, 7 itself are channels 1 1, 12, 13th present, which allow a circulation within the wall 10 and the housing parts 6, 7 enclosed, serving as a cooling medium gas or gas mixture, in particular of air.
  • the air circulation is realized by a first ventilator 10a. Siert, which is mounted on the shaft 3 and thus rotates with the rotor 2.
  • the air can also flow between the stator 9 and the rotor 2 rotating in its interior, it also being possible to use a suitable protective gas or a liquid coolant instead of air, provided this provides advantages with regard to the electrical insulation or the cooling effect can be.
  • the channels 13 within the housing parts 6, 7 are preferably mounted so that the bearings 4, 5 are flowed around by the gas to ensure in this way there is sufficient cooling and thus a long life of the bearings 4, 5.
  • the housing parts 6, 7 together with the wall 10 form an encapsulation of the motor 1 for protection against the ingress of dust or moisture.
  • the wall 10 is surrounded by an outer housing 14.
  • the housing 14 comprises an inner wall 15 and an outer wall 16, between which run fresh air ducts 17 for a fresh air duct.
  • the inner wall 15 surrounds the wall 10 in a thermally conductive connection in order to dissipate heat from the interior of the motor 1 in the direction of the channels 17 can.
  • the channels 1 1 extend axially within the stator 9.
  • the wall 10 shown in Fig. 1 is in turn still part of the stator 9 itself.
  • the from the stator 9 and 10 and penetrated by the channels 1 1 penetrated Stator is then enclosed by the inner wall 15, which dissipates the heat generated in the stator 9. Accordingly, the inner wall 15 then forms part of the encapsulation of the engine 1.
  • the construction of the stator 9 of this type will be explained in more detail later with reference to FIG. 5.
  • the fresh air ducts 17 are connected to frontal openings 18, 19 for the air inlet or to the air outlet.
  • the openings 18, 19 are formed, for example, in end caps 16a, 16b, wherein FIG. 4 shows an example of the end cap 16b, as will be explained later.
  • a second fan 14a is arranged on the shaft 3, which rotates with the rotor 2 and sucks in air through the openings 18 and the fresh air duct 17 and via the openings 19th blows.
  • Part of the heat generated in the rotor 2 is guided via the shaft 3 to a shaft end 3 a projecting from the encapsulation and can there be discharged to the environment.
  • the shaft end 3a carries a fan of the second fan 14a. Namely, the heat can thus be transmitted to the fan of the second fan 14a and released there to the environment by the flow of cooling air generated by the second fan 14a.
  • a magnetic motor 20 is likewise completely inserted or encapsulated in an encapsulation 21.
  • the magnet motor 20 comprises a rotor 22 formed by permanent magnets and a stator 23 surrounding it.
  • the rotor 22 is supported by a shaft 24.
  • the rotor 22 and the stator 23 are enclosed in the encapsulation 21, wherein the encapsulation 21 contacts the stator 23 over as large a surface area as possible in order to ensure good heat transfer from the stator 23 to the encapsulation 21.
  • the encapsulation 21 is in turn surrounded by a housing 25. wherein between the housing 25 and the enclosure 21 a through-flow of air cavity 26 is present. The air enters the cavity 26 through openings 27 and exits through openings 28, bypassing the enclosure 21 and cooling the interior of the engine 20.
  • the air which has entered the cavity 26 via the openings 27 is sucked in through a second ventilator 14a and blown out through the openings 28.
  • the second fan 14a is fastened on the rotor shaft 24 or a shaft end 24a of the rotor shaft 24.
  • the fresh air flows through fresh air channels 29 and in this way along the enclosure 21, so that the heat transferred from the enclosure 21 can be effectively taken up by the fresh air and discharged to the environment.
  • a portion of the heat can also be led out of the encapsulation 21 via the shaft end 24 a of the shaft 24.
  • the heat can continue to be transmitted from the shaft end 24a to the fan of the second fan 14a.
  • the housing 14 shown in Fig. 1 is shown in Fig. 3 in section and constructed as a heat exchanger, for example so that the outer wall 16 is connected to the inner wall 15 via webs 30. From the inner wall 15 ribs 31 protrude into the fresh air ducts 17 in order to improve the heat transfer from the wall 15 into the air flowing through the fresh air ducts 17. fibers.
  • the encapsulation 21 of the magnetic motor 20 shown in FIG. 2 may preferably have on its outer side cooling fins which form the fresh air channels 29.
  • FIG. 4 shows a plan view of the cover 16b with the ventilation openings 19.
  • Fig. 5 is a sectional view through the stator 9 is shown.
  • the channels 11 penetrating the stator have a lens-shaped cross-section.
  • a stator constructed in the manner shown in FIG. 5 may be radially surrounded directly by the inner wall 15 of the heat exchanger.
  • a non-contact sensor can be provided, with which the speed or the position of the rotor 2, 22 can be detected. In this way, a speed and / or position control of the electric motor can be realized in a simple manner.
  • the sensor can be fully encapsulated inside the motor to protect it from damaging external influences.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

La présente invention concerne une machine pour faire fonctionner un dispositif de vibration interne qui présente un moteur électrique (1, 20) disposé dans un boîtier, se présentant sous la forme d'un moteur de dispositif de vibration interne, pouvant être relié à une masse non équilibrée disposée dans un boîtier de dispositif de vibration, et entraînant ladite masse non équilibrée. Le moteur électrique (1, 20) se présente sous la forme d'un moteur électrique sans balai (1, 20) comprenant un stator (9, 23) et un rotor (2, 22). Le moteur électrique (1, 20) est refermé par une capsule (10, 15, 21) de sorte qu'aucune humidité et aucun corps étranger ne peut pénétrer dans le moteur. Le refroidissement du moteur s'effectue par l'intermédiaire d'un courant d'air frais qui circule le long du côté extérieur de la capsule (10, 15, 21).
PCT/EP2008/005688 2007-07-20 2008-07-11 Machine pour faire fonctionner un dispositif de vibration interne WO2009012903A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007034013A DE102007034013A1 (de) 2007-07-20 2007-07-20 Arbeitsmaschine für einen Innenrüttler
DE102007034013.5 2007-07-20

Publications (2)

Publication Number Publication Date
WO2009012903A2 true WO2009012903A2 (fr) 2009-01-29
WO2009012903A3 WO2009012903A3 (fr) 2009-04-16

Family

ID=39865254

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/005688 WO2009012903A2 (fr) 2007-07-20 2008-07-11 Machine pour faire fonctionner un dispositif de vibration interne

Country Status (2)

Country Link
DE (1) DE102007034013A1 (fr)
WO (1) WO2009012903A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2566015B1 (fr) * 2011-08-29 2019-11-27 Grundfos Management A/S Moteur électrique
US9413208B2 (en) * 2013-01-08 2016-08-09 Hamilton Sundstrand Corporation Enhanced cooling of enclosed air cooled high power motors
DE102017122494A1 (de) 2017-09-27 2019-03-28 Ebm-Papst Landshut Gmbh Elektromotor mit verbesserter Motorkühlung zum Antrieb eines Lüfters
EP3587706B1 (fr) * 2018-06-25 2021-02-17 Idneo Technologies, S.A.U. Vibrateur de béton
DE102018132145A1 (de) * 2018-12-13 2020-06-18 Volocopter Gmbh Luftgekühlter Elektromotor mit gekapseltem Gehäuse

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2148765A (en) * 1935-04-25 1939-02-28 Mall Arthur William Mass and form vibrator
US2454371A (en) * 1946-06-08 1948-11-23 Borg Warner Explosion-proof motor
DE2419458A1 (de) * 1974-04-23 1975-11-13 Bosch Gmbh Robert Innenruettler
DE3115698C1 (de) * 1981-04-18 1982-12-16 Alfred Kärcher GmbH & Co, 7057 Winnenden Motorpumpeneinheit fuer ein Hochdruckreinigungsgeraet
EP0242550A2 (fr) * 1986-04-17 1987-10-28 Alfred Kärcher GmbH & Co. Groupe moto-pompe pour appareil de nettoyage à haute pression
DE3901893A1 (de) * 1988-01-29 1989-08-10 Mikasa Sangyo Kk Betonruettler
EP0420473A1 (fr) * 1989-09-23 1991-04-03 Black & Decker Inc. Appareil de nettoyage haute pression de main
DE4312328A1 (de) * 1993-04-15 1994-10-20 Licentia Gmbh Geschalteter Reluktanzmotor
DE20017054U1 (de) * 2000-09-30 2001-01-18 Tamme Werner Innenrüttler
DE10354002A1 (de) * 2003-11-19 2005-06-02 Wacker Construction Equipment Ag Innenrüttelvorrichtung mit Drehzahlregelung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT230700B (de) * 1960-03-19 1963-12-30 Frankenwerk Maschinenfabrik Ge Vorrichtung an Rüttlergehäusen
DE1784455B1 (de) * 1968-08-09 1971-09-08 Schwing Gmbh F Ruettler,der an Betonfoerdervorrichtungen selbstfahrender Baumaschinen fest angebracht ist
US5725304A (en) * 1995-12-13 1998-03-10 Makita Corporation Battery concrete vibrator
FR2749602B1 (fr) * 1996-06-05 1999-02-19 Forest Daniel Vibrateur a aiguille portatif

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2148765A (en) * 1935-04-25 1939-02-28 Mall Arthur William Mass and form vibrator
US2454371A (en) * 1946-06-08 1948-11-23 Borg Warner Explosion-proof motor
DE2419458A1 (de) * 1974-04-23 1975-11-13 Bosch Gmbh Robert Innenruettler
DE3115698C1 (de) * 1981-04-18 1982-12-16 Alfred Kärcher GmbH & Co, 7057 Winnenden Motorpumpeneinheit fuer ein Hochdruckreinigungsgeraet
EP0242550A2 (fr) * 1986-04-17 1987-10-28 Alfred Kärcher GmbH & Co. Groupe moto-pompe pour appareil de nettoyage à haute pression
DE3901893A1 (de) * 1988-01-29 1989-08-10 Mikasa Sangyo Kk Betonruettler
EP0420473A1 (fr) * 1989-09-23 1991-04-03 Black & Decker Inc. Appareil de nettoyage haute pression de main
DE4312328A1 (de) * 1993-04-15 1994-10-20 Licentia Gmbh Geschalteter Reluktanzmotor
DE20017054U1 (de) * 2000-09-30 2001-01-18 Tamme Werner Innenrüttler
DE10354002A1 (de) * 2003-11-19 2005-06-02 Wacker Construction Equipment Ag Innenrüttelvorrichtung mit Drehzahlregelung

Also Published As

Publication number Publication date
WO2009012903A3 (fr) 2009-04-16
DE102007034013A1 (de) 2009-01-29

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