DE102024103029A1 - Method for operating a construction and/or slurry pumping system and construction and/or slurry pumping system - Google Patents

Abstract

The invention relates to a method for operating a construction and/or slurry pump system (1),
- wherein the construction and/or slurry pump system (1) comprises:
- a construction and/or thick material conveying system (2) which is designed to convey construction and/or thick material (BDS) with a variably adjustable conveying flow (FF), and
- a hydraulic drive system (3) which, for driving the construction and/or thick material conveying system (2), comprises:
- at least one drive cylinder (4a, 4b) and at least one associated drive piston (5a, 5b) which is arranged for lifting movement in the drive cylinder (4a, 4b),
- a drive pump device (6) which has at least, in particular exactly, one drive pump (7) which is designed to rotate at a variably adjustable pump speed (n7) to generate a variably adjustable drive flow (AF) of hydraulic fluid (HF) for moving the drive piston (5a, 5b), and
- a drive motor device (8) which has at least, in particular exactly, one electric drive motor (9) which is designed to variably adjust its motor speed (n9) to rotate the drive pump (7) at the pump speed (n7) to generate the drive flow (AF),
- the method comprising the steps of:
a) accelerating the drive piston (5a, 5b) from a stroke starting point (HAPa, HAPb) of the drive piston (5a, 5b) to start the stroke movement by increasing the engine speed (n9), in particular from zero, and
b) braking the drive piston (5a, 5b) to a stroke end point (HEPa, HEPb) of the drive piston (5a, 5b) to terminate the stroke movement by reducing the motor speed (n9), in particular at least to zero.

Description

FIELD OF APPLICATION AND STATE OF THE ART

The invention relates to a method for operating a construction and/or slurry pumping system and to such a construction and/or slurry pumping system.

TASK AND SOLUTION

The object of the invention is to provide a method for operating a construction and/or slurry pumping system and such a construction and/or slurry pumping system, each of which has improved properties.

The invention solves this problem by providing a method and a construction and/or slurry pumping system as described in the independent claims. Advantageous developments of the invention are described in the dependent claims.

1. a) Beschleunigen des Antriebskolbens von einem Hubanfangspunkt des Antriebskolbens weg, insbesondere ab dem Hubanfangspunkt, zum Anfangen des Hubbewegens mindestens teilweise, insbesondere vollständig, verursacht durch Erhöhen der Motordrehzahl, insbesondere von Null aus.
2. b) Abbremsen des Antriebskolbens auf einen Hubendpunkt des Antriebskolbens zu, insbesondere bis zu dem Hubendpunkt, zum Beenden des Hubbewegens mindestens teilweise, insbesondere vollständig, verursacht durch Erniedrigen der Motordrehzahl, insbesondere mindestens bis auf Null, insbesondere genau bis auf Null.

The method according to the invention is for operating a construction and/or slurry pumping system, in particular for conveying construction and/or slurry. The construction and/or slurry pumping system has a construction and/or slurry conveying system and, in particular, a hydraulic drive system. The construction and/or slurry conveying system is designed to convey the construction and/or slurry with a variably adjustable conveying flow or conveying volume flow. The hydraulic drive system has, for driving the construction and/or slurry conveying system, at least one drive cylinder and at least one associated drive piston, in particular, a drive pump device and, in particular, a drive motor device, and is designed, in particular, for driving. The drive piston is arranged and, in particular, designed for reciprocating movement in the drive cylinder. The drive pump device has at least, in particular, one drive pump. The drive pump is designed to rotate at a variably adjustable pump speed, at least partially, in particular completely, to generate a variably adjustable drive flow or drive volume flow of hydraulic fluid for reciprocating the drive piston. The drive motor device comprises at least, in particular precisely, one electric drive motor. The electric drive motor is designed to variably adjust its motor speed to, in particular directly, rotate or drive the drive pump at the pump speed to generate the drive flow. The method comprises the steps:

1. a) Accelerating the drive piston away from a stroke starting point of the drive piston, in particular from the stroke starting point, to start the stroke movement at least partially, in particular completely, caused by increasing the engine speed, in particular from zero.
2. b) Braking the drive piston towards a stroke end point of the drive piston, in particular up to the stroke end point, to terminate the stroke movement at least partially, in particular completely, caused by reducing the engine speed, in particular at least to zero, in particular exactly to zero.

This enables precise, dynamic and/or efficient, in particular power-efficient, operation of the hydraulic drive system, and in particular thus of the construction and/or thick matter pump system, in particular in a partial load operation or partial load range or for a low to medium and/or non-maximum, in particular maximum possible, flow rate or drive flow.

In particular, the method, operation, conveyance, driving, lifting, rotating, generating, adjusting, accelerating, increasing, decelerating and/or lowering can be automatic and/or computer-implemented.

The term “comprises” or “has” can be used synonymously with the term “comprises”.

The term “configured,” “established,” or “intended” can be used synonymously with the term “trained.”

The building material can be mortar, cement, screed, concrete, and/or plaster. Additionally or alternatively, the thickener can be sludge.

The construction and/or slurry pumping system may be a concrete pumping system and/or mobile, in particular a car construction and/or slurry pumping system.

The term “adjustable” or “changeable” can be used synonymously with the phrase “variably adjustable” and the term “adjusting” or “changing” can be used synonymously with the phrase “variable setting”.

Variable adjustment or variable setting can be to at least three different values or amounts, in particular continuously.

The flow, pump speed, drive flow and/or motor speed may have a value or an amount.

The term “belonging” can be used synonymously with the term “assigned”.

The hydraulic fluid can be hydraulic oil.

The lifting movement and/or the rotation can be variable.

The drive pump device can be at least partially, in particular completely, variably operated.

At least partially can mean, in particular, at least 50% (percent), in particular at least 60%, in particular at least 70%, in particular at least 80%, in particular at least 90%.

The electric drive motor can be variably operated or have variable speed and/or, in particular, be electrically controllable.

The adjustment, increase and/or decrease can be carried out in a targeted and/or controlled manner, in particular by means of a control device of the construction and/or slurry pump system.

Step a) may include controlling the increase.

Step b) may comprise controlling the lowering.

This can enable optimized running behavior, particularly through the full controllability, in particular controllability, of the electric drive motor, and in particular thus a reduction or even an avoidance of damaging peaks or spikes, in particular a pressure of the construction and/or thick material and/or the hydraulic fluid.

The term “electric machine” can be used synonymously with the term “electric drive motor”.

The term “tax” or “rule” can be used synonymously with the term “control”.

The term “take place” can be used synonymously with the phrase “be carried out”.

The electric drive motor may be a controlling variable and/or a load may or may not be the controlling variable.

The acceleration can be positive and/or coincide with the increase.

The deceleration can be negative and/or coincident with the deceleration.

Step a) may or may not involve braking the drive piston and/or reducing the engine speed.

Step b) may or may not involve accelerating the drive piston and/or increasing the engine speed.

Step a) can be, in particular be carried out for, in particular a maximum of, one, in particular first, half or up to one half of a path or a distance of the lifting movement.

Step b) can be, in particular be carried out starting from one half or for, in particular at most, a further, in particular second, half of the path or the distance of the lifting movement.

The term “beginning” can be used synonymously with the term “beginning”.

The stroke start point and the stroke end point can be different.

The term “direction reversal point” can be used synonymously with the term “stroke end point” or “stroke start point”.

The term “position” can be used synonymously with the term “point”.

Step a) can be carried out repeatedly, especially several times.

Step b) can be carried out temporally, in particular immediately, after step a) and/or, in particular several times, repeatedly.

The process can be carried out, in particular multiple times, repeatedly and/or continuously or continuously.

The term “direct” can be used synonymously with the term “immediate”.

The term “effects” can be used synonymously with the term “causes”.

The drive motor device may or may not include an internal combustion engine.

For further information, please refer to the specialist literature.

In a further development of the invention, the electric drive motor is a synchronous motor, in particular a permanent magnet motor, and/or with an associated frequency converter of the hydraulic drive system. This enables particularly efficient operation of the hydraulic drive system. In particular, the terms "synchronous machine" or "synchronous drive motor" can be used synonymously with the term "synchronous motor." Additionally or alternatively, the synchronous motor can be liquid-cooled, in particular water-, glycol-, and/or oil-cooled, in particular with a water-glycol mixture. For further details, reference is made to the relevant specialist literature.

Additionally or alternatively, the electric drive motor can be a separately excited synchronous motor, a reluctance motor, an asynchronous motor and/or a hybrid such as a permanently excited reluctance motor and/or an asynchronous motor with permanent magnets.

In a further development of the invention, the pump speed depends on the engine speed; in particular, the pump speed corresponds to, or is equal to, the engine speed. In particular, this can be permanent or constant over at least one stroke cycle. This enables simple operation of the hydraulic drive system, in particular, simple control of the drive pump.

Additionally or alternatively, the hydraulic drive system may comprise a transmission, in particular with a constant or temporally permanent gear ratio, between the drive motor device, in particular the electric drive motor, and the drive pump device, in particular the drive pump, in particular that the electric drive motor can be used to rotate the drive pump by means of the transmission and/or the electric drive motor and the drive pump can be mechanically connected by means of the transmission.

In a further development of the invention, a pump shaft of the drive pump and a motor shaft of the electric drive motor are mechanically rigidly or non-rotatably connected to one another, in particular the electric drive motor is seated on the pump shaft. Additionally or alternatively, the drive pump and the electric drive motor are directly flanged to one another. This enables the pump speed to be dependent on the motor speed and/or a simple connection and/or, in particular thus, a simple structure of the hydraulic drive system, and in particular thus of the construction and/or slurry pump system, in particular with few components. In particular, the pump shaft can be a pump drive shaft. Additionally or alternatively, the motor shaft can be a motor output shaft. Further additionally or alternatively, the electric drive motor can be connected to the pump shaft without or can or does not need to be connected to it by or via a separable clutch or a freewheel.

In a further development of the invention, the drive pump is a fixed-displacement pump, in particular an axial piston fixed-displacement pump. This enables particularly efficient operation of the hydraulic drive system. In particular, the axial piston fixed-displacement pump can have an even number of pistons and/or at least 10, in particular at least 16, in particular 24, pistons. This can enable a reduction in vibrations. For further information, reference is made to the relevant literature.

• c) Beschleunigen des Antriebskolbens von dem Hubendpunkt als weiteren Hubanfangspunkt des Antriebskolbens weg, insbesondere ab dem weiteren Hubanfangspunkt, zum Anfangen des Hubbewegens in umgekehrter Richtung mindestens teilweise, insbesondere vollständig, verursacht durch Erhöhen der Motordrehzahl, insbesondere von Null aus, in umgekehrter Drehrichtung.
• d) Abbremsen des Antriebskolbens auf den Hubanfangspunkt als weiteren Hubendpunkt des Antriebskolbens zu, insbesondere bis zu dem weiteren Hubendpunkt, zum Beenden des Hubbewegens in umgekehrter Richtung mindestens teilweise, insbesondere vollständig, verursacht durch Erniedrigen der Motordrehzahl, insbesondere mindestens bis auf Null, insbesondere genau bis auf Null, in umgekehrter Drehrichtung.

In a further development of the invention, the drive pump is designed to rotate in the reverse direction to generate the drive flow in the reverse direction for reciprocating the drive piston in the reverse direction. The electric drive motor is designed to reverse its direction of rotation to rotate the drive pump in the reverse direction to generate the drive flow in the reverse direction. The method comprises the following steps, in particular chronologically after steps a) and b):

• c) accelerating the drive piston away from the stroke end point as a further stroke starting point of the drive piston, in particular from the further stroke starting point, to start the stroke movement in the reverse direction at least partially, in particular completely, caused by increasing the engine speed, in particular from zero, in the reverse direction of rotation.
• d) Braking of the drive piston towards the stroke start point as a further stroke end point of the drive piston, in particular up to the further stroke end point, in order to terminate the stroke movement in the reverse direction at least partially, in particular completely, caused by reducing the engine speed, in particular at least to zero, in particular exactly to zero, in the reverse direction of rotation.

This enables simple and/or dynamic operation, in particular control, of the hydraulic drive system, in particular a simple and/or rapid change or switching between the suction and displacement stroke or a conveying direction, and/or a simple design of the hydraulic drive system, and thus in particular of the construction and/or slurry pump system, in particular with few components. Additionally or alternatively, a fixed-displacement pump can be advantageous for this, in particular being fast and/or efficient and/or compared to a swivel pump.

In particular, the term “opposite” can be used synonymously with the term “reverse”.

The stroke movement can be between the stroke start point and the stroke end point or the cycle of the stroke movement can be back and forth.

Step c) may include controlling the increase.

Step d) may comprise controlling the lowering.

Step c) may or may not involve braking the drive piston and/or reducing the engine speed.

Step d) may or may not involve accelerating the drive piston and/or increasing the engine speed.

Step c) can be, in particular, carried out for, in particular a maximum of, the further half or up to the further half of the path.

Step d) can be carried out from the further half or for, in particular at most, one half of the path.

Step c) can be carried out temporally, in particular immediately, after step b) and/or, in particular several times, repeatedly.

Step d) can be carried out temporally, in particular immediately, after step c) and/or, in particular several times, repeatedly.

Step a) can be carried out temporally, in particular immediately, after step d), in particular repeatedly.

For further information, please refer to the specialist literature.

In a further development of the invention, the method comprises, in particular, the step of determining, in particular calculating and/or detecting, at least one position variable characteristic of a position of the drive piston in the drive cylinder, in particular by means of a position detection device. Step a) and/or step b), and in particular step c) and/or step d), are/is carried out as a function of the determined position variable. This enables precise operation of the hydraulic drive system, in particular precise control of the electric drive motor. In particular, the determination can be automatic and/or computer-implemented and/or synchronized with the stroke movement, in particular with step a), step b), step c) and/or step b). Additionally or alternatively, the position variable can have a value or an amount. Further additionally or alternatively, the term "characteristic" or "representative" can be used synonymously with the term "characteristic". Further additionally or alternatively, the position can be the stroke end point or the stroke start point. Additionally or alternatively, the position detection device can be electrical and/or at least one limit switch or a position sensor or position measuring system and/or of the construction and/or slurry pump system, in particular the hydraulic drive system. For further information, please refer to the relevant specialist literature.

In a further development of the invention, at least the drive pump device and the drive cylinder form a, particularly completely closed, drive circuit for hydraulic fluid. This, in particular this and the fixed-displacement pump, enable highly dynamic operation, particularly control, of the hydraulic drive system, and thus in particular of the construction and/or slurry pump system, with very rapid direction reversal in each stroke.

In a further development of the invention, the hydraulic drive system has at least, in particular exactly, two drive cylinders and at least, in particular exactly, two respectively assigned drive pistons, and in particular a rocking line for hydraulic fluid. The drive pistons are arranged and in particular designed for, in particular for the and/or respective, lifting movement in the, in particular respective, drive cylinders. In particular, at least the drive pump device and the drive cylinders form a, in particular the and/or closed, drive circuit for hydraulic fluid by means of the rocking line. The drive pistons are phase-coupled by means of the rocking line, in particular at least in terms of time or stroke sections, in particular permanently in time, in particular against in phase or for counter-rotating stroke movement. For further information, please refer to the specialist literature.

In a further development of the invention, the construction and/or high-density material conveying system comprises at least one conveying cylinder, in particular exactly two conveying cylinders, at least one associated conveying piston, in particular exactly two associated conveying pistons, and at least one associated piston rod, in particular exactly two associated piston rods, in particular for conveying construction and/or high-density material. The conveying piston is arranged and in particular designed for reciprocating movement in the conveying cylinder. The reciprocating movement of the conveying piston and the reciprocating movement of the drive piston are coupled, in particular permanently, by means of the piston rod. In particular, the piston rod can be attached to the conveying piston and to the drive piston. Additionally or alternatively, the conveying cylinder can be designed to receive construction and/or high-density material and to discharge the received construction and/or high-density material. The conveying piston can be designed to draw construction and/or high-density material into the conveying cylinder and to displace drawn-in construction and/or high-density material from the conveying cylinder through its reciprocating movement. For further details, reference is made to the specialist literature.

• - zu dem Beschleunigen des Antriebskolbens von dem Hubanfangspunkt des Antriebskolbens weg zu dem Anfangen des Hubbewegens durch das Erhöhen der Motordrehzahl, und
• - zu dem Abbremsen des Antriebskolbens auf den Hubendpunkt des Antriebskolbens zu zum Beenden des Hubbewegens durch das Erniedrigen der Motordrehzahl.

The construction and/or slurry pump system according to the invention comprises the construction and/or slurry conveying system and the hydraulic drive system. The construction and/or slurry conveying system is designed to convey the construction and/or slurry with the variably adjustable conveying flow. The hydraulic drive system has at least one drive cylinder, at least one associated drive piston, the drive pump device, and the drive motor device for driving the construction and/or slurry conveying system. The drive piston is arranged in the drive cylinder for the reciprocating movement. The drive pump device has at least one drive pump. The drive pump is designed to rotate at the variably adjustable pump speed to generate the variably adjustable drive flow from the hydraulic fluid for the reciprocating movement of the drive piston. The drive motor device has at least one electric drive motor. The electric drive motor is designed to variably adjust its motor speed to rotate the drive pump at the pump speed to generate the drive flow. The construction and/or slurry pump system is designed to:

• - to accelerate the drive piston away from the stroke starting point of the drive piston to the beginning of the stroke movement by increasing the engine speed, and
• - to brake the drive piston to the end point of the stroke of the drive piston to end the stroke movement by reducing the engine speed.

The construction and/or slurry pumping system can provide the same advantage(s) as mentioned for the process above.

In particular, the construction and/or slurry pump system, in particular the control device, can be designed to carry out the method, in particular automatically, as mentioned above. Additionally or alternatively, the English formulation “programmed to perform the function/s of” can be used synonymously with the term “designed”. Further additionally or alternatively, the construction and/or slurry pump system, in particular the control device, can be electric and/or have a computing device and/or a processor and/or a microcontroller and/or a memory device and/or a computer. Further additionally or alternatively, the construction and/or slurry pump system can be designed at least partially, in particular completely, as mentioned above for the method.

BRIEF DESCRIPTION OF THE DRAWINGS

• 1 einen ersten schematischen Schaltplan eines erfindungsgemäßen Bau- und/oder Dickstoffpumpensystems bei einem erfindungsgemäßen Verfahren zum Betreiben des Bau- und/oder Dickstoffpumpensystems aufweisend genau eine Konstantpumpe, genau einen Elektroantriebsmotor und einen geschlossenen Antriebskreis für Hydraulikflüssigkeit,
• 2 einen zweiten schematischen Schaltplan des erfindungsgemäßen Bau- und/oder Dickstoffpumpensystems bei dem erfindungsgemäßen Verfahren zu dem Betreiben des Bau- und/oder Dickstoffpumpensystems aufweisend genau eine Konstantpumpe, genau einen Elektroantriebsmotor und einen offenen Antriebskreis für Hydraulikflüssigkeit,
• 3 einen dritten schematischen Schaltplan des erfindungsgemäßen Bau- und/oder Dickstoffpumpensystems bei dem erfindungsgemäßen Verfahren zu dem Betreiben des Bau- und/oder Dickstoffpumpensystems aufweisend eine Konstantpumpe, einen Elektroantriebsmotor, eine Schwenkpumpe, einen weiteren Antriebsmotor und einen geschlossenen Antriebskreis für Hydraulikflüssigkeit,
• 4 einen vierten schematischen Schaltplan des erfindungsgemäßen Bau- und/oder Dickstoffpumpensystems bei dem erfindungsgemäßen Verfahren zu dem Betreiben des Bau- und/oder Dickstoffpumpensystems aufweisend eine Konstantpumpe, einen Elektroantriebsmotor, eine Schwenkpumpe, einen weiteren Antriebsmotor und einen geschlossenen Antriebskreis für Hydraulikflüssigkeit in Verbindung mit einem offenen Antriebskreis für Hydraulikflüssigkeit,
• 5 einen Graphen eines Förderfluss von Bau- und/oder Dickstoff gefördert mittels eines Bau- und/oder Dickstofffördersystems und eines Antriebsfluss von Hydraulikflüssigkeit erzeugt mittels eines Hydraulikantriebssystems, eines Schwenkwinkels der Schwenkpumpe sowie einer Motordrehzahl des Elektroantriebsmotors und einer Motordrehzahl des weiteren Antriebsmotors des Bau- und/oder Dickstoffpumpensystems jeweils über der Zeit,
• 6 ein schematisches Wirkungsgradkennfeld des Elektroantriebsmotors, und
• 7 einen weiteren schematischen Schaltplan des Bau- und/oder Dickstoffpumpensystems aufweisend ein Bau- und/oder Dickstofffördersystem.

Further advantages and aspects of the invention emerge from the claims and from the description of exemplary embodiments of the invention, which are explained below with reference to the figures. In the figures:

• 1 a first schematic circuit diagram of a construction and/or slurry pump system according to the invention in a method according to the invention for operating the construction and/or slurry pump system comprising exactly one fixed pump, exactly one electric drive motor and a closed drive circuit for hydraulic fluid,
• 2 a second schematic circuit diagram of the construction and/or slurry pump system according to the invention in the method according to the invention for operating the construction and/or slurry pump system comprising exactly one fixed pump, exactly one electric drive motor and an open drive circuit for hydraulic fluid,
• 3 a third schematic circuit diagram of the construction and/or thick matter pump system according to the invention in the method according to the invention for operating the construction and/or thick matter pump system comprising a fixed pump, an electric drive motor, a swivel pump, a further drive motor and a closed drive circuit for hydraulic fluid,
• 4 a fourth schematic circuit diagram of the construction and/or slurry pump system according to the invention in the method according to the invention for operating the construction and/or slurry pump system comprising a fixed displacement pump, an electric drive motor, a swivel pump, a further drive motor and a closed drive circuit for hydraulic fluid in connection with an open drive circuit for hydraulic fluid,
• 5 a graph of a flow rate of construction and/or thick matter conveyed by means of a construction and/or thick matter conveying system and a drive flow of hydraulic fluid generated by means of a hydraulic drive system, a swivel angle of the swivel pump as well as a motor speed of the electric drive motor and a motor speed of the further drive motor of the construction and/or thick matter pumping system, each plotted against time,
• 6 a schematic efficiency map of the electric drive motor, and
• 7 a further schematic diagram of the construction and/or thick matter pumping system comprising a construction and/or thick matter conveying system.

DETAILED DESCRIPTION OF THE EMBODIMENTS

1 to 4, 5, 6 and 7 show a construction and/or thick matter pump system 1 according to the invention and a method according to the invention for operating the construction and/or thick matter pump system 1.

The construction and/or thick matter pumping system 1 comprises a construction and/or thick matter conveying system 2 and a hydraulic drive system 3. The construction and/or thick matter conveying system 2 is designed, in particular, to convey construction and/or thick matter BDS with a variably adjustable conveying flow FF. The hydraulic drive system 3 comprises, in particular drives, at least one drive cylinder 4a, 4b and at least one associated drive piston 5a, 5b, a drive pump device 6, and a drive motor device 8 for driving the construction and/or thick matter conveying system 2. The drive piston 5a, 5b is arranged, in particular moves, in the drive cylinder 4a, 4b for reciprocating movement. The drive pump device 6 comprises at least one drive pump 7. The drive pump 7 is designed to rotate at a variably adjustable pump speed n7 to generate a variably adjustable drive flow AF of hydraulic fluid HF for the reciprocating movement of the drive piston 5a, 5b, in particular, it rotates and thus generates. The drive motor device 8 has at least one electric drive motor 9. The electric drive motor 9 is designed to variably adjust its motor speed n9 to rotate the drive pump 7 at the pump speed n7 to generate the drive flow AF, in particular, it adjusts and thus rotates.

1. a) Beschleunigen des Antriebskolbens 5a, 5b von einem Hubanfangspunkt HAPa, HAPb des Antriebskolbens 5a, 5b weg zum Anfangen des Hubbewegens durch Erhöhen der Motordrehzahl n9, insbesondere von Null aus.
2. b) Abbremsen des Antriebskolbens 5a, 5b auf einen Hubendpunkt HEPa, HEPb des Antriebskolbens 5a, 5b zu zum Beenden des Hubbewegens durch Erniedrigen der Motordrehzahl n9, insbesondere mindestens bis auf Null.

The procedure includes the following steps:

1. a) Accelerating the drive piston 5a, 5b away from a stroke starting point HAPa, HAPb of the drive piston 5a, 5b to start the stroke movement by increasing the engine speed n9, in particular from zero.
2. b) Braking the drive piston 5a, 5b to a stroke end point HEPa, HEPb of the drive piston 5a, 5b to terminate the stroke movement by reducing the motor speed n9, in particular at least to zero.

• - zu dem Beschleunigen des Antriebskolbens 5a, 5b von dem Hubanfangspunkt HAPa, HAPb des Antriebskolbens 5a, 5b weg zu dem Anfangen des Hubbewegens durch das Erhöhen der Motordrehzahl n9, insbesondere erhöht und beschleunigt somit, und
• - zu dem Abbremsen des Antriebskolbens 5a, 5b auf den Hubendpunkt HEPa, HEPb des Antriebskolbens 5a, 5b zu zum Beenden des Hubbewegens durch das Erniedrigen der Motordrehzahl n9, insbesondere erniedrigt und bremst somit ab.

The construction and/or thick matter pump system 1, in particular a control device of the construction and/or thick matter pump system 1, is designed to:

• - to accelerate the drive piston 5a, 5b away from the stroke starting point HAPa, HAPb of the drive piston 5a, 5b to start the stroke movement by increasing the engine speed n9, in particular increasing and accelerating it, and
• - to brake the drive piston 5a, 5b to the stroke end point HEPa, HEPb of the drive piston 5a, 5b to end the stroke movement by reducing the engine speed n9, in particular reducing it and thus braking it.

In detail, the electric drive motor 9 is a synchronous motor 9', in particular a permanent magnet motor, and/or with an associated frequency converter 10 of the hydraulic drive system 3.

Furthermore, the pump speed n7 depends on the motor speed n9. In particular, the pump speed n7 corresponds to, and is equal to, the motor speed n9.

In addition, a pump shaft W7 of the drive pump 7 and a motor shaft W9 of the electric drive motor 9 are mechanically rigidly connected to each other. Additionally or alternatively, the drive pump 7 and the electric drive motor 9 are directly flanged to each other.

In particular, the drive pump device 6 can completely control the drive pump 7 to generate the drive flow AF of hydraulic fluid HF, as in 1 and 2 shown, or at least one further drive pump 7W exactly partially for generating the drive flow AF, as in 3 and 4 and 5 shown. In particular, the drive pump 7 can be large, and the further drive pump 7W can be small in comparison. Additionally or alternatively, the drive pump 7 and the further drive pump 7W can be independent of each other.

Further additionally or alternatively, the drive motor device 8 can precisely the electric drive motor 9, in particular precisely for the drive pump 7, as in 1 and 2 shown, or at least one further drive motor 9W, in particular precisely for the further drive pump 7W, as in 3 and 4 and 5 shown.

In addition, the drive pump 7 is a fixed displacement pump 7', in particular an axial piston fixed displacement pump 7".

In particular, the further drive pump 7W can be a variable displacement pump 7W'', in particular a swivel pump 7W'' with a variably adjustable swivel angle W7W.

• c) Beschleunigen des Antriebskolbens 5a, 5b von dem Hubendpunkt HRPa, HEPb als weiteren Hubanfangspunkt HAPa', HAPb' des Antriebskolbens 5a, 5b weg zum Anfangen des Hubbewegens in umgekehrter Richtung durch Erhöhen der Motordrehzahl n9, insbesondere von Null aus, in umgekehrter Drehrichtung.
• d) Abbremsen des Antriebskolbens 5a, 5b auf den Hubanfangspunkt HAPa, HAPb als weiteren Hubendpunkt HEPa', HEPb' des Antriebskolbens 5a, 5b zu zum Beenden des Hubbewegens in umgekehrter Richtung durch Erniedrigen der Motordrehzahl n9, insbesondere mindestens bis auf Null, in umgekehrter Drehrichtung.

Furthermore, the drive pump 7 is designed to rotate in the reverse direction of rotation to generate the drive flow AF in the reverse direction for moving the drive piston 5a, 5b in the reverse direction, in particular rotates in the reverse direction of rotation and thus generates, as in 1 and 3 and 5 shown. The electric drive motor 9 is designed to reverse its direction of rotation to rotate the drive pump 7 in the reverse direction of rotation to generate the drive flow AF in the reverse direction, in particular, reverses and thus rotates. The method comprises the steps, in particular chronologically after steps a) and b):

• c) Accelerating the drive piston 5a, 5b away from the stroke end point HRPa, HEPb as a further stroke start point HAPa', HAPb' of the drive piston 5a, 5b to start the stroke movement in the reverse direction by increasing the motor speed n9, in particular from zero, in the reverse direction of rotation.
• d) Braking of the drive piston 5a, 5b to the stroke start point HAPa, HAPb as a further stroke end point HEPa', HEPb' of the drive piston 5a, 5b to terminate the stroke movement in the reverse direction by reducing the motor speed n9, in particular at least to zero, in the reverse direction of rotation.

In particular, the swivel pump 7W'' can be designed for, in particular rapid, swiveling precisely partially to generate the drive flow AF in the opposite direction, in particular swivels and thus generates, in particular temporally with and/or after the reduction of the engine speed n9 and/or temporally before and/or with the increase of the engine speed n9, as in 3 and 4 and 5 shown.

The swivel pump 7W'' can enable switching between suction and displacement strokes, and in particular, additionally, the supply and discharge of hydraulic fluid HF. Additionally or alternatively, the fixed-displacement pump 7' can enable a large amount of efficiency, especially since the swivel pump 7W can only be effective at a large or high swivel angle W7W.

In particular, the constant pump 7' cannot or need not be designed to rotate in the opposite direction or to be reversible, as in 2 and 4 Additionally or alternatively, the hydraulic drive system 3 can have a valve device 17, in particular controllable, in particular controllable by means of the control device, as shown in 2 and 4 The valve device 17 can be designed to switch between the intake and displacement strokes. For further information, please refer to the relevant literature.

Furthermore, the method comprises, in particular, the step of determining, in particular calculating and/or detecting, at least one position variable PGa, PGb characteristic of a position Pa, Pb of the drive piston 5a, 5b in the drive cylinder 4a, 4b, in particular by means of a position detection device 11a, 11b. Step a) and/or step b) are/is carried out depending on the determined position variable PGa, PGb.

Furthermore, at least the drive pump device 6 and the drive cylinder 4a, 4b form a closed drive circuit 12' for hydraulic fluid HF, as in 1 , 3 and 4 shown, especially in conjunction with an open drive circuit for hydraulic fluid HF, as in 4 shown.

In particular, the drive pump device 6 and the drive cylinder 4a, 4b, and in particular the valve device 17, can form an open drive circuit for hydraulic fluid HF, as in 2 shown.

Additionally or alternatively, in the case of the closed drive circuit 12', and in particular not in the case of the open drive circuit, the hydraulic drive system 3 can have a feed pump device that can also pump hydraulic fluid HF when switching between the intake and displacement strokes. For further information, reference is made to the relevant literature.

In addition, the hydraulic drive system 3 has at least, in the embodiments shown, two drive cylinders 4a, 4b and at least, in the embodiments shown, two respectively associated drive pistons 5a, 5b, and in particular a rocking line 13 for hydraulic fluid HF, as in 7 shown. The drive pistons 5a, 5b are arranged for reciprocating movement in the drive cylinders 4a, 4b, in particular move. In particular, at least the drive pump device 6 and the drive cylinders 4a, 4b form the, in particular closed, drive circuit 12, 12' for hydraulic fluid HF by means of the reciprocating line 13. The drive pistons 5a, 5b are phase-coupled by means of the reciprocating line 13.

In alternative embodiments, the hydraulic drive system may comprise exactly one drive cylinder and exactly one associated drive piston, and in particular not a rocking line.

Furthermore, the construction and/or thick matter conveying system 2 comprises at least one conveying cylinder 14a, 14b, in particular exactly two conveying cylinders 14a, 14b, at least one associated conveying piston 15a, 15b, in particular exactly two associated conveying pistons 15a, 15b, and at least one associated piston rod 16a, 16b, in particular exactly two associated piston rods 16a, 16b. The conveying piston 15a, 15b is arranged for reciprocating movement in the conveying cylinder 14a, 14b, in particular moves. The reciprocating movement of the conveying piston 15a, 15b and the reciprocating movement of the drive piston 5a, 5b are coupled by means of the piston rod 16a, 16b.

Furthermore, step a) and/or step b), and in particular step c) and/or step d), can be carried out depending on at least one efficiency, in particular an efficiency characteristic map of the drive motor device 8, in particular of the electric drive motor 9, as in 6 shown, and/or the drive pump device 6, in particular the drive pump 7, in particular optimized, in particular efficiency-optimized.

Furthermore, the hydraulic drive system 3 can have an overload device, in particular a pressure relief valve device. This can enable intrinsic safety of the hydraulic drive system 3, and thus in particular of the construction and/or slurry pump system 1.

As the embodiments shown and explained above make clear, the invention provides an advantageous method for operating a construction and/or slurry pumping system and such an advantageous construction and/or slurry pumping system, each having improved properties.

Claims (11)

Method for operating a construction and/or slurry pumping system (1), - wherein the construction and/or slurry pumping system (1) comprises: - a construction and/or slurry conveying system (2) designed to convey construction and/or slurry (BDS) with a variably adjustable conveying flow (FF), and - a hydraulic drive system (3) designed to drive the construction and/or slurry conveying system (2): - at least one drive cylinder (4a, 4b) and at least one associated drive piston (5a, 5b) arranged for reciprocating movement in the drive cylinder (4a, 4b), - a drive pump device (6) comprising at least, in particular precisely, one drive pump (7) designed to rotate at a variably adjustable pump speed (n7) to generate a variably adjustable drive flow (AF) of hydraulic fluid (HF) for reciprocating movement of the drive piston (5a, 5b), and - a A drive motor device (8) comprising at least, in particular precisely, one electric drive motor (9) configured to variably adjust its motor speed (n9) to rotate the drive pump (7) at the pump speed (n7) to generate the drive flow (AF), - wherein the method comprises the steps of: a) accelerating the drive piston (5a, 5b) from a stroke start point (HAPa, HAPb) of the drive piston (5a, 5b) to begin the stroke movement by increasing the motor speed (n9), in particular from zero, and b) decelerating the drive piston (5a, 5b) to a stroke end point (HEPa, HEPb) of the drive piston (5a, 5b) to terminate the stroke movement by reducing the motor speed (n9), in particular at least to zero. Method according to the preceding claim, - wherein the electric drive motor (9) is a synchronous motor (9'), in particular a permanently excited one, and/or with an associated frequency converter (10) of the hydraulic drive system (3). Method according to one of the preceding claims, - wherein the pump speed (n7) depends on the engine speed (n9), in particular corresponds to the engine speed (n9), in particular is equal to it. Method according to one of the preceding claims, - wherein a pump shaft (W7) of the drive pump (7) and a motor shaft (W9) of the electric drive motor (9) are mechanically rigidly connected to one another, and/or - wherein the drive pump (7) and the electric drive motor (9) are directly flanged to one another. Method according to one of the preceding claims, - wherein the drive pump (7) is a fixed displacement pump (7'), in particular an axial piston fixed displacement pump (7''). Method according to one of the preceding claims, - wherein the drive pump (7) is designed to rotate in the reverse direction of rotation to generate the drive flow (AF) in the reverse direction for reciprocating the drive piston (5a, 5b) in the reverse direction, and - wherein the electric drive motor (9) is designed to reverse its direction of rotation to rotate the drive pump (7) in the reverse direction of rotation to generate the drive flow (AF) in the reverse direction, - wherein the method comprises the steps, in particular chronologically after steps a) and b): c) accelerating the drive piston (5a, 5b) away from the stroke end point (HEPa, HEPb) as a further stroke start point (HAPa', HAPb') of the drive piston (5a, 5b) to begin the reciprocating movement in the reverse direction by increasing the motor speed (n9), in particular from zero, in the reverse direction of rotation, and d) braking the drive piston (5a, 5b) towards the stroke start point (HAPa, HAPb) as a further stroke end point (HEPa', HEPb') of the drive piston (5a, 5b) to terminate the stroke movement in the reverse direction by reducing the motor speed (n9), in particular at least to zero, in the reverse direction of rotation. Method according to one of the preceding claims, - wherein the method, in particular, comprises the step of: - determining, in particular calculating and/or detecting, at least one position variable (PGa, PGb) characteristic of a position (Pa, Pb) of the drive piston (5a, 5b) in the drive cylinder (4a, 4b), in particular by means of a position detection device (11a, 11b), and - wherein step a) and/or step b) are/is carried out depending on the determined position variable (PGa, PGb). Method according to one of the preceding claims, - wherein at least the drive pump device (6) and the drive cylinder (4a, 4b) form a closed drive circuit (12') for hydraulic fluid (HF). Method according to one of the preceding claims, - wherein the hydraulic drive system (3) comprises: - at least, in particular exactly, two drive cylinders (4a, 4b) and at least, in particular exactly, two respectively associated drive pistons (5a, 5b), which are arranged in the drive cylinders (4a, 4b) for lifting movement, - in particular a rocking line (13) for hydraulic fluid (HF), wherein at least the drive pump device (6) and the drive cylinders (4a, 4b) form a, in particular closed, drive circuit (12, 12') for hydraulic fluid (HF) by means of the rocking line (13), and wherein the drive pistons (5a, 5b) are phase-coupled by means of the rocking line (13). Method according to one of the preceding claims, - wherein the construction and/or thick material conveying system (2) comprises: - at least one conveying cylinder (14a, 14b), at least one associated conveying piston (15a, 15b), and at least one associated piston rod (16a, 16b), wherein the conveying piston (15a, 15b) is arranged for reciprocating movement in the conveying cylinder (14a, 14b), and wherein the reciprocating movement of the conveying piston (15a, 15b) and the reciprocating movement of the drive piston (5a, 5b) are coupled by means of the piston rod (16a, 16b). Construction and/or thick matter pumping system (1), in particular for carrying out a method according to one of the preceding claims, - wherein the construction and/or thick matter pumping system (1) comprises: - a construction and/or thick matter conveying system (2) which is designed to convey construction and/or thick matter (BDS) with a variably adjustable conveying flow (FF), and - a hydraulic drive system (3) which, for driving the construction and/or thick matter conveying system (2), comprises: - at least one drive cylinder (4a, 4b) and at least one associated drive piston (5a, 5b) which is arranged for reciprocating movement in the drive cylinder (4a, 4b), - a drive pump device (6) which has at least one drive pump (7) which is designed to rotate at a variably adjustable pump speed (n7) to generate a variably adjustable drive flow (AF) of hydraulic fluid (HF) for reciprocating movement of the drive piston (5a, 5b), and - a drive motor device (8), which has at least one electric drive motor (9), which cher is designed for variably setting its motor speed (n9) to rotate the drive pump (7) at the pump speed (n7) to generate the drive flow (AF), - wherein the construction and/or thick matter pump system (1) is designed: - to accelerate the drive piston (5a, 5b) away from a stroke start point (HAPa, HAPb) of the drive piston (5a, 5b) to start the stroke movement by increasing the motor speed (n9), and - to brake the drive piston (5a, 5b) to a stroke end point (HEPa, HEPb) of the drive piston (5a, 5b) to end the stroke movement by reducing the motor speed (n9).