EP0949183A2 - Fahrwerk, insbesondere für Hebezeuge und hängende Lasten - Google Patents
Fahrwerk, insbesondere für Hebezeuge und hängende Lasten Download PDFInfo
- Publication number
- EP0949183A2 EP0949183A2 EP99250093A EP99250093A EP0949183A2 EP 0949183 A2 EP0949183 A2 EP 0949183A2 EP 99250093 A EP99250093 A EP 99250093A EP 99250093 A EP99250093 A EP 99250093A EP 0949183 A2 EP0949183 A2 EP 0949183A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- motor
- time
- time constant
- stationary
- chassis
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
- B66D1/40—Control devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C9/00—Travelling gear incorporated in or fitted to trolleys or cranes
- B66C9/14—Trolley or crane travel drives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C11/00—Trolleys or crabs, e.g. operating above runways
- B66C11/02—Trolleys or crabs, e.g. operating above runways with operating gear or operator's cabin suspended, or laterally offset, from runway or track
- B66C11/04—Underhung trolleys
- B66C11/06—Underhung trolleys running on monorails
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C9/00—Travelling gear incorporated in or fitted to trolleys or cranes
- B66C9/18—Travelling gear incorporated in or fitted to trolleys or cranes with means for locking trolleys or cranes to runways or tracks to prevent inadvertent movements
Definitions
- the invention relates to a method and a chassis according to the preambles of Claims 1 and 6.
- a generic chassis is known that one Flange parts and web parts includes existing rail.
- On this chassis is a pair of impellers are provided which face each other on the Support the inside of the lower flange.
- the leaders are in front and behind the Guide wheels arranged on both sides on the side surfaces of the lower one Dock.
- the wheels and the guide rollers are pivoted on spars that are interconnected below the rail.
- the chassis is driven in that one of the impellers can be driven by a motor via a worm is.
- guides arranged in which the guide wheels of the chassis to run.
- the solution provides for a self-locking Worm gear chassis after switching on a stationary Motor voltage (U0) each have a start-up time constant during the start-up process from the reciprocal mean temporal increase in engine torque (M) multiplied by the motor torque (M0) of the stationary phase and that the engine torque (M) is reduced so that the chassis the instantaneous change in engine torque (M) over time (t) with a time constant that is greater than the start-up time constant.
- the effective self-locking and the associated braking effect steadily so that there is no locking of the wheels.
- the Deceleration of the chassis set by changing the engine torque so that an effect similar to that of a traction drive with a flywheel and mechanical brake is achieved.
- the engine torque reduction in Interaction with the self-locking worm gear has the same effect like turning on the brake on a traction drive with a flywheel, namely a soft braking without rolling movements, but with the advantage that no brake has to be readjusted and maintained and that on the space-intensive and costly attachment of the flywheel usually required can be dispensed with.
- the process can be carried out simply if the start-up time constant is from the mean temporal change in the current consumption in a predetermined time interval (t1, t2), which occurs between the switch-on time and the time until it is reached of the stationary motor current (10) divided by the stationary motor current (10) is determined.
- t1, t2 a predetermined time interval
- a further simplification results if the to brake the chassis Motor voltage (U) divided by the stationary motor voltage (U0) over time is reduced that the time change of the normalized motor voltage (U / U0) with a time constant occurs that is greater than that at any time (t) Start-up time constant is.
- the time interval only when a predetermined current threshold value after the start-up process begins.
- the control effort is reduced when the stationary motor voltage (U0) is off identical voltage pulses is formed, whose time interval in the Start-up phase and in the stationary phase kept equidistant and in the Braking phase is continuously increased, the time constant of the change in normalized mean value of the motor voltage (U) greater than that at any time (t) Approach time constant of the loaded chassis is. Normalized here means based on the mean value of the motor voltage (U) in the stationary phase.
- the solution to the chassis provides that the chassis is one has self-locking worm gear and that a control device is provided during the start-up process after switching on a stationary motor voltage each have a start-up time constant from the reciprocal mean time increase in engine torque (M) multiplied by Motor torque (M0) of the stationary phase is determined and that for braking the engine torque (M) is reduced so that the current change over time of the engine torque (M) at any time (t) with a There is a time constant that is greater than the start-up time constant.
- a permanent magnet can advantageously be used as the electric motor DC electric motor can be used because the only provided motor Operating mode of the electric motor no braking torque has to be applied.
- the use of a collector motor is inexpensive.
- a chassis is shown in a front view, the rail 1 comprises, which consists of flange parts 2 and a web 3 with lateral guides 3a.
- the undercarriage has two arm-shaped wheel carriers 4a, 4b, which form a frame 5a, 5b form.
- the two wheel carriers 4a, 4b are around one in the direction of the travel rail 1 axis 6 extending and running under the cross section of the rail pivoted, which allows pivoting on the rail 1, can but also be rigidly connected. It is also a combination of these two variants possible, in which the two wheel carriers 4a, 4b after Swiveling on the rail 1 are fixable.
- Fig. 1 shows that in the upper region of the wheel carrier 4a, 4b a pair opposite impellers 7 is arranged, the axes of rotation of which are horizontal run and which are supported on the wheel carriers 4a, 4b.
- One of the two Impellers 7 are driven by means of an electric motor 7a that is only operated by a motor driven, between the electric motor 7a and the driven impeller 7 a worm gear 7b is connected.
- the wheels 7 roll on the treads 8 of the lower flange.
- In front of and behind the wheels 7 are in the wheel carriers 4a, 4b each paired horizontal guide rollers 9, the lie in pairs on the web 3 of the rail 1.
- the load generates a closing moment in the wheel carriers 4a, 4b, which causes a swiveling causes the guide rollers 9 on the web 3 of the rail cross section be kept pivoted.
- the angular position between the wheel carriers 4a, 4b is limited in Figure 1 by the guide rollers 9 resting on the web 3 on both sides; the guide rollers 9 are loaded with force by the load.
- FIG. 2 is a top view of the undercarriage with the travel rail according to FIG. 1 shown.
- the only motor-operated electric motor 7a is a permanently excited one DC motor 7c; here is a low-cost collector motor Permanent magnets are provided.
- the electric motor 7a gives during its operation always a motor torque M, since it is connected to the self-locking worm gear 7b is operated with a base load torque.
- the combination of the DC motor 7a and the self-locking Worm gear 7b consequently corresponds to a drive "with the brake switched on”.
- a control device 11 shown schematically in FIG. 1 takes care of the Desired time course of the motor voltage applied to the electric motor 7a U.
- the control device 11 has a predeterminable lower one Current threshold ISU and an upper current threshold ISO and can the Check motor current I.
- the control device 11 has a predeterminable lower one Current threshold ISU and an upper current threshold ISO and can the Check motor current I.
- the Current threshold ISU the time t1 and when the Current threshold value ISO the time t2 detected in the control device 11 and the mean current change per unit of time is formed by means of the time difference t2-t1.
- control device 11 calculates a start-up time constant of the loaded chassis.
- the motor voltage U that is the current on the electric motor 7a applied voltage
- the control device 11 When braking, the motor voltage U, that is the current on the electric motor 7a applied voltage, reduced by the control device 11 so that the temporal change in motor voltage U divided by the stationary motor voltage U0 with a time constant (braking time constant) that is greater than that Approach time constant (corresponds to straight line 13, which is opposite to the straight line 12 runs; the amounts of the slopes of the two straight lines are identical).
- the Motor voltage change per unit of time can be, for example, with a time constant take place that is half the start-up time constant. That way ensures that the self-locking is switched on so slowly that the Do not block impellers 7.
- the motor voltage U is followed by the motor current I and thus the time delay motor torque M proportional to this
- a second embodiment provides that the electric motor 7a of the Control device 11 driven with identical square-wave voltage pulses whose time interval is changed by the control device 11 can.
- the time interval kept equidistant.
- the time intervals in such a way that the change in the mean of the Motor voltage U per unit time at any time t greater than that Approach time constant of the loaded chassis is.
- the start-up time constant is calculated from the reciprocal mean time Increase in engine torque (M), i.e. (t2-t1) / M, multiplied by that Motor torque (M0) of the stationary phase, i.e. (t2-t1) M0 / M, determined and to Braking the chassis reduces the engine torque (M) so that the current the engine torque (M) changes over time with a time constant, which is greater than the start-up time constant.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
- Control And Safety Of Cranes (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
- Fig. 1
- eine Vorderansicht eines Fahrwerks,
- Fig. 2
- eine Draufsicht auf das Fahrwerk gemäß Fig. 1 und
- Fig. 3
- eine schematisch Darstellung des Verlauf des Motorstroms 1/10 beim Anfahren sowie der Motorspannung U/U0 beim Bremsen.
- 1
- Fahrschiene
- 2
- Flanschteil
- 3
- Steg
- 3a
- Führung
- 4a, 4b
- Radträger
- 5a, 5b
- Rahmen
- 6
- Achse
- 7
- Laufrad
- 7a
- Elektromotor
- 7b
- Schneckengetriebe
- 7c
- Gleichstrommotor
- 8
- Lauffläche
- 9
- Führungsrolle
- 10
- Gelenk
- 11
- Steuerungseinrichtung
- 12, 13
- Anstiegsgerade
- ISU
- unterer Stromschwellenwert
- ISO
- oberer Stromschwellenwert
- U
- Motorspannung
- M
- Motordrehmoment
- I
- Motorstrom
- I0
- stationärer Motorstrom
Claims (8)
- Verfahren zum Bremsen eines Fahrwerks, insbesondere für Hebezeuge und hängende Lasten, das mindestens ein direkt von einem Elektromotor über ein Schneckengetriebe angetriebenes Laufrad aufweist,
dadurch gekennzeichnet,
daß für das ein selbsthemmendes Schneckengetriebe (7b) aufweisende Fahrwerk nach dem Einschalten einer stationären Motorspannung (U0) während des Anfahrvorgangs jeweils eine Anfahrzeitkonstante aus dem reziproken mittleren zeitlichen Anstieg des Motordrehmoments (M) multipliziert mit dem Motordrehmoment (M0) der stationären Phase bestimmt wird und daß zum Bremsen des Fahrwerks das Motordrehmoment (M) so verringert wird, daß die momentane zeitliche Änderung des Motordrehmoments (M) zu jedem Zeitpunkt (t) mit einer Zeitkonstanten erfolgt, die größer als die Anfahrzeitkonstante ist. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß die Anfahrzeitkonstante aus der reziproken mittleren zeitlichen Änderung der Stromaufnahme in einem vorbestimmten Zeitintervall (t1, t2), das zwischen dem Einschaltzeitpunkt und dem Zeitpunkt bis zum Erreichen des stationären Motorstromes (10) liegt, multipliziert mit dem stationären Motorstrom (10) bestimmt wird. - Verfahren nach einem der Ansprüche 1 oder 2,
dadurch gekennzeichnet,
daß zum Bremsen des Fahrwerks die Motorspannung (U) dividiert durch die stationäre Motorspannung (U0) zeitlich so reduziert wird, daß die zeitliche Änderung der normierten Motorspannung (U/U0) mit einer Zeitkonstanten erfolgt, die zu jedem Zeitpunkt (t) größer als die Anfahrzeitkonstante ist. - Verfahren nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß das Zeitintervall jeweils bei Erreichens eines ersten vorgegebenen Stromschwellenwertes (ISU) nach dem Einschaltvorgang beginnt. - Verfahren nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß die Motorspannung (U0) aus identischen Spannungsimpulsen gebildet wird, deren zeitlicher Abstand in der Anfahrphase und in der stationären Phase äquidistant gehalten und in der Bremsphase kontinuierlich vergrößert wird, wobei die Zeitkonstante der Änderung des normierten Mittelwerts der Motorspannung (U) zu jedem Zeitpunkt (t) größer als die Anfahrzeitkonstante ist. - Fahrwerk, insbesondere für Hebezeuge und hängende Lasten, das das mindestens ein direkt von einem Elektromotor über ein Schneckengetriebe angetriebenes Laufrad aufweist,
dadurch gekennzeichnet,
daß das Fahrwerk ein selbsthemmendes Schneckengetriebe (7b) aufweist und daß eine Steuerungseinrichtung (11) vorgesehen ist, die während des Anfahrvorgangs nach dem Einschalten einer stationären Motorspannung jeweils eine Anfahrzeitkonstante aus dem reziproken mittleren zeitlichen Anstieg des Motordrehmoments (M) multipliziert mit dem Motordrehmoment (M0) der stationären Phase bestimmt wird und daß zum Bremsen des Fahrwerks das Motordrehmoment (M) so verringert wird, daß die momentane zeitliche Änderung des Motordrehmoments (M) zu jedem Zeitpunkt (t) mit einer Zeitkonstanten erfolgt, die größer als die Anfahrzeitkonstante ist. - Fahrwerk nach nach Anspruch 6,
dadurch gekennzeichnet,
daß der Elektromotor (7a) ein permanent erregter Gleichstrommotor (7c) ist. - Fahrwerk nach Anspruch 7,
dadurch gekennzeichnet,
daß der Elektromotor (7a) ein Kollektormotor ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19816573 | 1998-04-07 | ||
DE19816573 | 1998-04-07 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0949183A2 true EP0949183A2 (de) | 1999-10-13 |
EP0949183A3 EP0949183A3 (de) | 2002-11-13 |
EP0949183B1 EP0949183B1 (de) | 2004-01-21 |
Family
ID=7864526
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99250093A Expired - Lifetime EP0949183B1 (de) | 1998-04-07 | 1999-03-26 | Fahrwerk, insbesondere für Hebezeuge und hängende Lasten |
Country Status (5)
Country | Link |
---|---|
US (1) | US6153992A (de) |
EP (1) | EP0949183B1 (de) |
JP (1) | JP2000086152A (de) |
KR (1) | KR19990082964A (de) |
DE (1) | DE59908337D1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107500144A (zh) * | 2017-09-22 | 2017-12-22 | 河北卓达建材研究院有限公司 | 一种用于房屋建设的四坐标桥式起重机 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2393709B (en) * | 2002-10-01 | 2005-12-21 | Guldmann V As | Worm drive for overhead crab |
CN101618832B (zh) * | 2008-07-02 | 2013-05-15 | 哈尔滨理工大学 | 大型零件搬运装配的智能轨道系统 |
FI126272B (fi) * | 2014-01-24 | 2016-09-15 | Konecranes Global Oy | Köysinostimen matalarakenteinen nostovaunu |
FI126273B (fi) * | 2014-01-24 | 2016-09-15 | Konecranes Global Oy | Köysinostimen matalarakenteinen nostovaunu |
CN107285194A (zh) * | 2017-08-24 | 2017-10-24 | 芜湖市长江起重设备制造有限公司 | 一种桥式起重机的电葫芦行走机构 |
CN107601276A (zh) * | 2017-10-30 | 2018-01-19 | 中船澄西船舶修造有限公司 | 一种吊装滑车 |
CN113371599B (zh) * | 2021-05-31 | 2022-06-28 | 泰安鑫诚机械科技有限公司 | 一种煤矿开采用单轨吊 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19620150A1 (de) | 1996-04-19 | 1997-10-23 | Mannesmann Ag | Fahrwerk, insbesondere für Kettenzüge, Lastaufnahmemittel und/oder Schleppkabel |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3785463A (en) * | 1972-05-09 | 1974-01-15 | Reliance Electric Co | Final stopping control |
US4342378A (en) * | 1979-12-27 | 1982-08-03 | Otis Elevator Company | Elevator door motion bench velocity |
DE3005461A1 (de) * | 1980-02-14 | 1981-09-24 | M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8500 Nürnberg | Regelung des oder der elektrischen fahrmotoren von hebezeugen mit ungefuehrter, an einem seil haengender last |
JPS56149964A (en) * | 1980-04-18 | 1981-11-20 | Hitachi Ltd | Controller for elevator |
EP0423384B1 (de) * | 1989-10-16 | 1993-07-28 | Otis Elevator Company | Steuerungsvorrichtung für Aufzuganlage ohne Geschwindigkeitsfühler |
FI91058C (fi) * | 1991-03-18 | 1996-01-10 | Kci Kone Cranes Int Oy | Nosturin ohjausmenetelmä |
DE4223561A1 (de) * | 1992-07-17 | 1994-01-20 | Siemens Ag | Zeitoptimierende Kranfahrwerks- bzw. Katzantriebssteuerung und -regelung |
DE59408176D1 (de) * | 1994-01-28 | 1999-06-02 | Inventio Ag | Verfahren zur Steuerung der Bewegung von Türen |
KR970003508B1 (ko) * | 1994-03-25 | 1997-03-18 | 한국원자력연구소 | 크레인의 진동방지를 위한 속도 제어 방법 |
DE19617104C2 (de) * | 1996-04-19 | 1998-09-03 | Mannesmann Ag | Fahrwerk, insbesondere für Kettenzüge und/oder Schleppkabel |
-
1999
- 1999-03-26 DE DE59908337T patent/DE59908337D1/de not_active Expired - Fee Related
- 1999-03-26 EP EP99250093A patent/EP0949183B1/de not_active Expired - Lifetime
- 1999-03-30 US US09/281,487 patent/US6153992A/en not_active Expired - Fee Related
- 1999-04-06 KR KR1019990011874A patent/KR19990082964A/ko not_active Application Discontinuation
- 1999-04-07 JP JP11099523A patent/JP2000086152A/ja active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19620150A1 (de) | 1996-04-19 | 1997-10-23 | Mannesmann Ag | Fahrwerk, insbesondere für Kettenzüge, Lastaufnahmemittel und/oder Schleppkabel |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107500144A (zh) * | 2017-09-22 | 2017-12-22 | 河北卓达建材研究院有限公司 | 一种用于房屋建设的四坐标桥式起重机 |
Also Published As
Publication number | Publication date |
---|---|
DE59908337D1 (de) | 2004-02-26 |
KR19990082964A (ko) | 1999-11-25 |
JP2000086152A (ja) | 2000-03-28 |
US6153992A (en) | 2000-11-28 |
EP0949183A3 (de) | 2002-11-13 |
EP0949183B1 (de) | 2004-01-21 |
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