EP1383616A1 - Commande pour systeme de reglage de desequilibre dans un dispositif de compactage du sol - Google Patents

Commande pour systeme de reglage de desequilibre dans un dispositif de compactage du sol

Info

Publication number
EP1383616A1
EP1383616A1 EP02732633A EP02732633A EP1383616A1 EP 1383616 A1 EP1383616 A1 EP 1383616A1 EP 02732633 A EP02732633 A EP 02732633A EP 02732633 A EP02732633 A EP 02732633A EP 1383616 A1 EP1383616 A1 EP 1383616A1
Authority
EP
European Patent Office
Prior art keywords
piston
signal
control
control according
reference piston
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
EP02732633A
Other languages
German (de)
English (en)
Other versions
EP1383616B1 (fr
Inventor
Franz Riedl
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.)
Wacker Construction Equipment AG
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 EP1383616A1 publication Critical patent/EP1383616A1/fr
Application granted granted Critical
Publication of EP1383616B1 publication Critical patent/EP1383616B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/10—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy
    • B06B1/16—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy operating with systems involving rotary unbalanced masses
    • B06B1/161—Adjustable systems, i.e. where amplitude or direction of frequency of vibration can be varied
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
    • E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
    • E01C19/28—Vibrated rollers or rollers subjected to impacts, e.g. hammering blows
    • E01C19/286—Vibration or impact-imparting means; Arrangement, mounting or adjustment thereof; Construction or mounting of the rolling elements, transmission or drive thereto, e.g. to vibrator mounted inside the roll
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02—Improving by compacting
    • E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
    • E02D3/074—Vibrating apparatus operating with systems involving rotary unbalanced masses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2838—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT with out using position sensors, e.g. by volume flow measurement or pump speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
    • F15B7/06—Details
    • F15B7/08—Input units; Master units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
    • F15B9/02—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type
    • F15B9/08—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor
    • F15B9/09—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor with electrical control means

Definitions

  • the invention relates to a control for an unbalance adjusting device in a vibration exciter.
  • vibration exciters are known in particular for use in soil compaction machines, such as vibration plates or rollers.
  • soil compaction machines such as vibration plates or rollers.
  • two - but also several - unbalanced shafts are driven in a counter-rotating manner, whereby the result of superimposing the centrifugal forces of each individual unbalanced shaft is a resulting force which, depending on the embodiment of the vibration exciter, can be adjusted in terms of its amount and / or direction.
  • Such vibration exciters have long been known, in particular in the case of vibration plates, so that a further description is unnecessary.
  • unbalance adjusting devices in which a transverse pin axially adjustable by an adjusting piston in an unbalanced shaft designed as a hollow shaft penetrates a longitudinal slot in the wall of the hollow shaft and engages in a spiral groove on the inside of a hub carrying an unbalance.
  • the adjusting devices thus serve to adjust the phase positions of unbalances to one another in order to reverse the direction of travel or to change the so-called “m r value”. They are based on hydraulic adjustment using a one-sided th piston, which is reset when the oil pressure drops either via a spring device or via the restoring torque exerted by the unbalance.
  • EP-A-0 960 659 also describes a control for an unbalance adjusting device in which the adjusting piston is hydraulically coupled to a reference piston.
  • the position of the reference piston is controlled by a switching valve.
  • the position of the switching valve in turn results from forces acting on the valve body from two sides, namely on one side by a force which can be predetermined by the operator and can be introduced into the valve body via a spring, and on the other side by a force from the reference piston via a spring force applied to the valve body.
  • the known control is difficult to coordinate and does not make it possible to implement different control algorithms. To tune or change the tuning, the characteristics of the spring sets acting on the valve body would have to be changed each time, which means either a high structural or a high installation effort.
  • the invention is based on the object of specifying a control for an unbalance adjustment device in a vibration exciter, in which a precise detection of the adjustment piston position and a simple and reliable control in the event of changes in the adjustment piston position is possible. Furthermore, it should be possible to detect the respective position of the adjusting piston and thus the unbalance or unbalanced shaft actuated by it.
  • the position of the adjusting piston hydraulically coupled reference piston detected by a signal generating device and forwarded in the form of a position signal.
  • a piston rod can be provided on the reference piston, the position of which corresponds to the position of the reference piston and thus allows precise conclusions to be drawn about the position of the adjusting piston and thus the unbalances or unbalanced shafts acted upon by the adjusting piston.
  • the position signal is supplied to the control device, which is, for. B. can be an electronic control, and which is still acted upon by a control signal emitted by an operator.
  • the control device compares the position signal, which corresponds to an actual value for the position of the unbalance in the vibration exciter, with the operating signal, which can be viewed as a target value.
  • the operating signal can be specifications of the operator with regard to the direction of travel, but also the vibration intensity to be generated by the vibration exciter.
  • the control device then generates a control signal with which a switching valve is activated in order to control the oil inflow or outflow to or from the second side of the reference piston.
  • the position of the reference piston and consequently also the position of the adjusting piston can thus be changed via the control device.
  • control device is an electronic control, all that is required is changes in the electronically stored program.
  • the adjusting piston is arranged on the vibration exciter, while the reference piston is arranged in a region that is decoupled in vibration from the vibration exciter.
  • a soil compaction device eg. B. a vibration plate, which is defined in claim 12 and a drive having an upper mass and a vibration exciter carrying, with the upper has mass coupled via a spring device, the adjusting piston of the control is arranged on the lower mass and the reference piston on the upper mass. Since vibration-sensitive components are required for detecting the position of the reference piston or its piston rod, for. B.
  • the reference piston is arranged on the lower-vibration upper mass of the soil compacting device, but not in the vicinity of the vibration exciter. The result is less stress on the sensitive components and the resulting higher reliability and accuracy of the measurements.
  • Fig. 1 is a block diagram of a controller according to the invention.
  • Fig. 1 shows a section of a soil compaction device, for. B. a vibration plate, in which the control according to the invention is used.
  • a vibration exciter 1 known per se and described above is arranged on a lower mass of the soil compaction device. Furthermore, a bottom contact plate, not shown, is provided on the lower mass for compacting the bottom.
  • an upper mass 2 which includes the drive.
  • An adjusting piston 3 is arranged directly on the vibration exciter 1, one side of which is acted upon by a spring 4. Its other side is connected via a hydraulic line 5 to a first side 6 of a reference piston 7 arranged on the upper mass 2.
  • a piston rod 10 On a second side 8 of the reference piston 7, which is axially movable in a cylinder 9, a piston rod 10 is arranged, which counteracts via a spring 11 a pressure sensor 12 is supported.
  • the pressure sensor 12 serving as a signal generating device detects the pressure exerted by the spring 11 and thus by the reference piston 7 and converts it into a position signal 13 indicating the position of the piston rod 10.
  • the position signal 13 is transmitted to a control device 14.
  • the control device 14 also receives an operating signal 15, which results from operator operations, for. B. an actuation of a lever or push buttons or is also caused by a remote control.
  • the position signal 13 can also be output via a visual or acoustic display in order to provide the operator with information about the behavior of the soil compacting device.
  • the control device 14 which is designed as an electronic control, determines which measures are necessary to fulfill the operator's wish. Accordingly, it generates a control signal 16, which is supplied to solenoid coils 17 of a switching valve 18.
  • the switching valve 18 shown in FIG. 1 with the solenoid coils 17 serves only for explanation.
  • the control signal 16 can be supplied to a valve in a variety of ways and have its position changed.
  • the switching valve 18 is a 3/3-way valve which can be switched between three positions 18a, 18b and 18c. It serves to control an oil inflow from an oil pump 19 serving as a pressure oil source to the second side 8 of the reference piston 7 or an oil outflow from the second side 8 to an oil return 20.
  • FIG. 1 shows the switching valve 18 in the position 18b in which an oil inflow and an oil outflow to or from the second side 8 of the reference piston 7 are interrupted.
  • the position 18a enables the oil to flow in, while the position 18c enables the oil to flow out into the return 20.
  • a safety valve 21 is also provided between the pressure side of the oil pump 19 and the oil return 20.
  • the first side 6 of the reference piston 7 is also connected to the oil return 20 via a check valve 22, the check valve 22 being installed in such a way that it prevents oil backflow from the first side 6 of the reference piston 7 to the oil return 20.
  • the oil filling in the hydraulic line 5 ensures that the adjusting piston 3 and the reference piston 7 are precisely coupled with regard to their movements.
  • Each change in the adjusting piston 3 also causes a change in the reference piston 7, which is detected via the piston rod 10 and the pressure sensor 12 and supplied to the control 14.
  • the controller 14 then initiates suitable measures by actuating the switching valve 18 depending on the operator's request and the resulting operating signal 15. For example, an oil inflow to the second side of the reference piston 7 is switched to position 18a via the switching valve, which causes the reference piston 7 to be shifted to the left, as shown in FIG. 1.
  • the adjusting piston 3 also shifts to the left as a result.
  • the switching valve 18 is switched to the position 18c so that the oil can flow from the second side 8 of the reference piston 7 into the oil return 20.
  • the oil in the hydraulic line 5 and on the first side 6 of the reference piston 7 is depressurized, so that the adjusting piston 3 is also displaced to the right by the action of the spring 4 or by the inertial effect of the imbalances supported by it, until it touches the mechanical one Stop of the cylinder receiving it comes to a standstill.
  • the reference piston 7 follows this movement until this standstill. If the amount of oil in the hydraulic line 5 and on the first side 6 - z. B. due to leakage losses - is too small, the reference piston 7 can not reach its right extreme position. However, the oil in the oil return 20 has a certain residual pressure through the throttle 23 forming a flow obstacle, which is sufficient, the check valve 22 to open. It should be noted that there is practically no oil pressure in the hydraulic line 5 and on the first side 6. Oil can thus flow in to the first side 6 of the reference piston 7 via the check valve 22 and compensate for any leakage losses. This compensation takes place through the different pressurizing surfaces on the first side 6 and the second side 8 of the reference piston 7 until it reaches its right extreme position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Architecture (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

La présente invention concerne une commande pour un système de réglage de déséquilibre dans un générateur de vibrations. Cette commande comprend un piston de réglage (3), qui est conçu pour modifier la position relative de déséquilibres dans ce générateur de vibrations (1) et qui est connecté à un piston de référence (7). La position d'une tige de piston (10) du piston de référence (7) est détectée par un capteur de pression (12) et est fournie à une commande sous forme d'un signal de position (13). Cette commande (14) compare ce signal de position (13) à un signal de fonctionnement (15) fourni par un utilisateur et produit un signal de commande (16) qui permet de modifier la position d'une soupape de commutation (18) commandant l'alimentation et l'évacuation d'huile du piston de référence (7).
EP02732633A 2001-05-02 2002-04-17 Commande pour systeme de reglage de desequilibre dans un dispositif de compactage du sol Expired - Lifetime EP1383616B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10121383 2001-05-02
DE10121383A DE10121383C2 (de) 2001-05-02 2001-05-02 Steuerung für eine Unwucht-Verstelleinrichtung in einem Vibrationserreger einer Bodenverdichtungsvorrichtung
PCT/EP2002/004260 WO2002087789A1 (fr) 2001-05-02 2002-04-17 Commande pour systeme de reglage de desequilibre dans un dispositif de compactage du sol

Publications (2)

Publication Number Publication Date
EP1383616A1 true EP1383616A1 (fr) 2004-01-28
EP1383616B1 EP1383616B1 (fr) 2005-05-18

Family

ID=7683402

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02732633A Expired - Lifetime EP1383616B1 (fr) 2001-05-02 2002-04-17 Commande pour systeme de reglage de desequilibre dans un dispositif de compactage du sol

Country Status (4)

Country Link
EP (1) EP1383616B1 (fr)
JP (1) JP4058346B2 (fr)
DE (2) DE10121383C2 (fr)
WO (1) WO2002087789A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004015589A1 (de) * 2004-02-29 2005-09-15 Bomag Gmbh Steuerung und Steuerungsverfahren für eine Vibrationsmaschine
EP1568420B1 (fr) 2004-02-29 2018-08-15 BOMAG GmbH Dispositif et méthode de commande pour une machine vibrante
CN102590865B (zh) * 2012-03-12 2013-09-11 杭州电子科技大学 用于水下地质勘测的水压驱动激振器
US20160290505A1 (en) * 2016-06-14 2016-10-06 Caterpillar Inc. Cylinder-piston assembly
DE102016124341A1 (de) 2016-12-14 2018-06-14 Hamm Ag Baumaschine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2692523B1 (fr) * 1992-06-19 1994-10-07 Procedes Tech Construction Dispositif pour la commande d'un vibrateur à moment variable.
AU692479B2 (en) * 1993-11-30 1998-06-11 Sakai Heavy Industries, Ltd. Vibrating mechanism and apparatus for generating vibrations for a vibration compacting roller with a variable amplitude
DE4425905A1 (de) * 1994-07-21 1996-01-25 Bald Hubert Vorrichtung und Verfahren zur Kompensation von Querschwingungen an Unwuchtvibratoren mit vorgegebener Schwingrichtung
JP3318528B2 (ja) * 1998-05-13 2002-08-26 三笠産業株式会社 振動締固め機の前後進操作機構
DE20008553U1 (de) * 2000-05-12 2000-08-31 Weber Maschinentechnik Gmbh Verstelleinheit für Bodenverdichter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02087789A1 *

Also Published As

Publication number Publication date
DE10121383A1 (de) 2002-11-14
DE10121383C2 (de) 2003-04-03
DE50203150D1 (de) 2005-06-23
JP2004524154A (ja) 2004-08-12
WO2002087789A1 (fr) 2002-11-07
EP1383616B1 (fr) 2005-05-18
JP4058346B2 (ja) 2008-03-05

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