DE102016120136A1 - Gravity hydraulic device and method of operating a gravity hydraulic device - Google Patents

Abstract

The invention relates to a gravity hydraulic device (1) for the energetic use of gravity of movably arranged masses (M1, M2) coupled to the gravity hydraulic device (1), wherein the gravity hydraulic device (1) comprises a pivot axis (D). having 360 ° rotatably mounted arrangement (11), and at least two jacket tubes (30,31) which are fixed with respect to the pivot center of the rotatably mounted arrangement (11) and which are each connected at the end with a hydraulic cylinder (20), wherein in the jacket tubes (30, 31) each a drill collar (40, 41) in the radial direction (R) back and forth movably mounted and end effective movement with each a cylinder piston (21) of the hydraulic cylinder (20) is connected and one in the closed Flow system (50) existing hydraulic fluid (51) via connecting tubes (53) of the flow system (50) in each case of the at one end of the jacket tubes (30, 31) arranged Hy Draulic cylinder (20) to each at the opposite other end of the jacket tubes (30, 31) arranged hydraulic cylinder (20) by actuating the hydraulic cylinder to the cylinder stroke (L) by means of the gravity of the drill collars (40, 41) is conveyed.

Description

The present invention relates to a hydraulic device, in particular a gravity hydraulic device, according to claim 1 and a method for operating such a hydraulic device.

State of the art

Rotary systems and devices are already known from the prior art with a flywheel known, in each of which a clever arrangement of weights and the use of gravity with sophisticated motion behavior are provided, in which out of a given momentum or directly out of gravity let them start moving. The decrease of a utilizable force or energy or work from this very movement has so far been insufficiently solved. In particular, occur in the known solutions in the prior art undesirable friction losses, which in particular in purely mechanical systems, the friction losses due to mechanical components such as bearings and the like are due.

From the 102010006197 A is
an engine for storing and releasing energy by means of rotating weights on a flywheel, in which it is possible to make with guided displaceable weights in conjunction with a focus on the center of gravity of a rotary circle geometric imbalance on a half-turn increased torque. The shift of the weights in the range of rotation of the upward movement and against gravity should be done with minimal energy consumption as a result of shorter arms than held in the analog mirror image rotation angle, so that in the system an excess torque is maintained in the longer term. According to the invention
a tripod carries the rotor, which leads the mass pieces as a guide. By installing a spring and a slideway the mass arrives prematurely at the fulcrum and is already in the quadrant with the positive moments before 180 degrees. The design of the main parts to modules and their completed in any number queuing strengthens the performance of the device in large areas.

In the DE 4329964 A a rotor is described, which carries on a hub radially opposite Balancierschienen. At the free end drill collars are attached with a weight tilted at one end. The ends of the drill collars are connected by a rope. In a rotation, the weights are moved on the ascending side to the hub, in which the drill collar tilts. Thus, a smaller moment arises on this side than on the opposite, downwards moving side. With this construction, an excess torque for the rotary drive is to be generated. The excess torque is not sufficient in this solution to produce a longer-lasting rotation.

Through the publication DE 295 21296 U a similar solution is known. Here, a radially displaceable weight are each arranged on a plurality of wings attached to a shaft. On the ascending side, the weights are thrown successively over a leading edge to the center and beyond to the other upper end of the wing. Again, the excess torque is too low to produce a longer lasting rotation.

It is therefore an object of the present invention to provide an improved device utilizing gravity, in which an overall improved efficiency can be achieved and the occurring system-specific internal losses are reduced, so that a longer-lasting rotation is possible. It is a particular object of the present invention to reduce mechanical frictional forces in the system and to provide a way to effect a cyclic energy absorption of the hydraulic device, which can be energetically used in particular via an output.

The basic idea of the present invention is therefore to provide a hydraulic device, in particular a gravity hydraulic device, for energetically utilizing the gravitational force of moveably arranged masses coupled to the gravity hydraulic device, cyclically converting the potential energy stored by the mass into hydraulic energy and vice versa. The realization of the cyclic energy conversion of potential into hydraulic energy and vice versa is done in particular by using a rotating arrangement on which both parts of the hydraulic components and the movable masses are arranged. It is particularly provided according to the invention to convey the moving masses via collars, from a lower position of lower potential energy to an upper position of higher potential energy by means of a double-acting cylinder.

According to the invention is therefore provided to provide a gravity hydraulic device with movably arranged with respect to the axis of rotation masses, wherein the gravity hydraulic device has a about a rotational axis 360 ° rotatably mounted arrangement, and at least two jacket tubes, with respect to the center of rotation at the rotatably mounted arrangement are fixed and which are each connected at the end to a hydraulic cylinder, wherein in the jacket tubes depending a drill collar in the radial direction is reciprocally mounted and this end is connected and coupled with a respective movable movement of a cylinder piston of the hydraulic cylinder. It is also provided in a closed flow system, a hydraulic fluid, which is connected via connecting tubes of the flow system from the disposed at one end of the jacket tubes hydraulic cylinder to each at the opposite other end of the jacket tubes arranged hydraulic cylinder by operating the hydraulic cylinder to the cylinder stroke by means of the gravity of the drill collars is transported. Due to the radial displacement of the masses, there is an effective torque, which is used in the direction of rotation.

In a particularly advantageous embodiment of the invention it is provided that the rotatably mounted arrangement is rotatably mounted about a horizontally arranged or mounted shaft and the radial movement of the drill collars corresponds to the stroke length of the respectively connected hydraulic cylinder. In other words, this means that the piston rod of the piston of the respective hydraulic cylinder is operatively coupled end to the drill collar, so that a downward movement of the drill collar due to gravity causes actuation of the piston rod and the hydraulic fluid in the hydraulic cylinder from the hydraulic cylinder via a correspondingly attached connection line to one of the double-acting cylinder pistons, which will be described below, is conveyed.

It is further provided with advantage that each of which is arranged at one end of a tubular casing hydraulic cylinder with the respectively arranged at the opposite other end of this jacket tube hydraulic cylinder via a double-acting hydraulic cylinder as mentioned above is fluidly connected, wherein the space between the one cylinder bottom of the double-acting hydraulic cylinder (Cylinder space) and the effective piston surface of the piston is fluidly connected to the one hydraulic cylinder, while the space between the opposite second cylinder bottom of the double-acting hydraulic cylinder and the second effective piston surface fluidly connected to the other hydraulic cylinder, namely the attached at the opposite end hydraulic cylinder is.

In a further advantageous embodiment of the invention, it is provided that the connecting lines of the hydraulic cylinder to the double-acting hydraulic cylinders are respectively openable and closable via shut-off valves preferably provided directly to the upper and lower hydraulic cylinder shut-off valves at a predetermined time, in particular in a certain or predetermined cycle , This ensures that, when the rotating arrangement of the gravity hydraulic device is rotated as intended, it can be ensured that the shut-off valves can be opened or closed at a specific point in time, that is to say in a specific position of the entire device and thus the position of the drill collars. so that the gravity hydraulic device operates according to the teaching of the invention.

According to the invention, it is therefore provided that a controller is provided which operates according to the relative position and / or angular position and / or rotational speed of the rotatably mounted arrangement at least one or, if present, a group of shut-off valves mounted on one side of the jacket pipes hydraulic cylinder intended can, in particular open or close, while the controller simultaneously or time-delayed at least one shut-off valve or, if present, actuate a group of shut-off valves of the hydraulic cylinder on the opposite side of the casing pipes, in particular open or close, can.

It is further provided with advantage when each of the piston of the double-acting cylinder is coupled to one of the arranged masses, so that at the same time the masses are actuated from a lower to an upper position with actuation of the piston of each double-acting cylinder. As a result, a coupling between the masses and the double-acting hydraulic cylinders is generated. Depending on location and timing, the masses are either in a lower position with lower potential energy or in an upper position with higher potential energy. While at the same time the piston rods of the double-acting cylinders are either in a lower or an upper position.

In a further advantageous embodiment of the invention it is provided that the drill collars are movably mounted in the casing pipes in a liquid.

In a likewise advantageous embodiment of the invention it is provided that the rotatable arrangement is equipped with a total output, for connecting a rotating system to be driven. Furthermore, in particular via a transmission, the energy stored in the system of the gravity hydraulic device can be decoupled and utilized via an output from the system.

1. a) Drehen der drehbaren Anordnung im oder entgegen dem Uhrzeigersinn um dessen horizontal gelagerte Drehachse, bis die Orientierung der Schwerstangen im Wesentlichen vertikal ist oder einer vorbestimmten Position entspricht und sich die unteren Hydraulikzylinder in einer unteren definierten Stellung und die oberen Hydraulikzylinder in einer oberen definierten Stellung befinden, wobei die Absperrventile der oberen Hydraulikzylinder geöffnet sind und die Absperrventile der unteren Hydraulikzylinder geschlossen sind;
2. b) Öffnen der Absperrventile der unteren Hydraulikzylinder an einer definierten Drehposition, wobei die Hydraulikflüssigkeit in den unteren Kolben aufgrund der Schwerkraft der Schwerstangen in den unteren Kolbenraum der doppelwirkenden Hydraulikzylinder befördert wird, wodurch der jeweilige Kolben des jeweiligen doppelwirkenden Hydraulikzylinders zusammen mit der daran gekoppelten Masse von einer unteren in eine oberen Position, und zwar um die Hublänge des jeweiligen doppelwirkenden Hydraulikzylinders, betätigt werden;
3. c) wodurch beim Betätigen des Kolbens gleichzeitig ein Befördern der Hydraulikflüssigkeit über eine Verbindungsleitung vom oberen Kolbenraum des doppelwirkenden Hydraulikzylinders in den jeweils damit verbundenen oberen Hydraulikzylinder bewirkt wird.

Another aspect of the present invention relates to a method of realizing a rotating or rotatable driving equipment or machine using a gravity hydraulic device as described above, comprising the steps of:

1. a) Rotating the rotatable assembly in or counterclockwise about its horizontally mounted axis of rotation until the orientation of the drill collars is substantially vertical or corresponds to a predetermined position and the lower hydraulic cylinder in a lower defined position and the upper hydraulic cylinder in an upper defined position with the shut-off valves of the upper hydraulic cylinders open and the shut-off valves of the lower hydraulic cylinders closed;
2. b) opening the shut-off valves of the lower hydraulic cylinder at a defined rotational position, wherein the hydraulic fluid is conveyed into the lower piston due to the gravity of the drill collars in the lower piston chamber of the double-acting hydraulic cylinder, whereby the respective piston of the respective double-acting hydraulic cylinder together with the mass of a lower to an upper position, namely the stroke length of the respective double-acting hydraulic cylinder operated;
3. c) whereby upon actuation of the piston at the same time conveyance of the hydraulic fluid is effected via a connecting line from the upper piston chamber of the double-acting hydraulic cylinder in the respectively associated upper hydraulic cylinder.

In an advantageous embodiment of the method according to the invention it is provided that after step c) the upper shut-off valves are closed and the upper hydraulic cylinders are brought by rotating the rotating assembly in a lower position, in which the lower hydraulic cylinders are in an upper position and the Open the shut-off valves of the now in the upper position hydraulic cylinder and connect the above steps again. In particular, it is provided that the steps mentioned repeat cyclically, so that overall a cyclically operating device is obtained.

• 1 eine schematische Ansicht eines Ausführungsbeispiels einer Schwerkrafthydraulikvorrichtung;
• 2 eine Ansicht ähnlich wie in der 1, allerdings in einer anderen Verfahrensstufe;
• 3 eine Ansicht ähnlich der 1 und 2 in einer gedrehten Verfahrensstufe.

Further advantageous embodiments of the invention are set forth in the subclaims. The invention will be explained in more detail below with reference to an exemplary embodiment, wherein the figures show the following:

• 1 a schematic view of an embodiment of a gravity hydraulic device;
• 2 a view similar to that in the 1 but at a different stage of the process;
• 3 a view similar to the one 1 and 2 in a rotated process step.

In the following, the invention will be described with reference to FIGS 1 to 3 explained in more detail, wherein like reference numerals refer to the same functional and / or structural features.

The 1 and 2 show different process times of a gravity hydraulic device 1 for energetic use of gravity of the movably arranged masses M1, M2.

The gravity hydraulic device 1 according to 1 and 2 has a about a rotational axis D by 360 ° rotatably mounted arrangement 11 on. For this purpose, for example, a frame-like frame is provided, whose height is at least half the height of the jacket tube used in the hydraulic system 30 . 31 , which will be described in more detail below, must have, and in which all forces and loads occurring can be absorbed by the frame.

At the upper end of said frame, a bearing block with bearing and shaft can be located, which also has to absorb all forces and can initiate into the frame.

The mentioned rotatably mounted arrangement 11 is rotatably mounted on a shaft and may, for example, constitute a disc or similar construction to which the components of said gravity hydraulic system are attached. On the rotatably mounted arrangement 11 are located in the present embodiment, two jacket pipes 30 . 31 , with respect to the pivot center of the rotatably mounted arrangement 11 are attached. For this purpose, the two jacket tubes can be mounted on the axially mounted disc. At the respective end of the jacket pipes 30 . 31 become hydraulic cylinders 20 provided, the cylinder bottoms each end of the total length of the jacket pipes 30 . 31 Are defined. These are arranged, so to speak, in extension to the jacket pipes.

In each of these jacket tubes is a drill collar 40 . 41 , which in the radial direction R back and forth within each one of the jacket tubes 30 . 31 is stored. Every collar 40 . 41 is end effective motion, each with a cylinder piston 21 one of the hydraulic cylinders 20 connected. The drill collars are there attached to the casing tube respectively matching the hydraulic cylinders. The length of a jacket pipe 30 . 31 with arranged hydraulic cylinder 20 corresponds to the length of the respective drill collar 40 . 41 and the hydraulic piston 20 minus one stroke length of the system.

Further, in a closed flow system, a hydraulic fluid 51 over connecting pipes 53 of the flow system 50 each of which at one end of the jacket pipes 30 . 31 arranged hydraulic cylinder 20 to each at the opposite other end of the jacket tubes arranged hydraulic cylinder 20 requested, by pressing the hydraulic cylinder 20 about the cylinder stroke L by means of the gravity of the drill collars 40,41. The crowbars 40 . 41 are in the jacket pipes 30 . 31 stored in liquid in the present embodiment. This has the advantage that the friction between the inside of the jacket tube 30 . 31 and the respective drill collar 40 . 41 is significantly reduced and at the same time after the hydrostatic paradox, a pressure on the corresponding hydraulic piston can be constructed. Alternatively, instead of storage in a liquid and a mechanical bearing system or guide system, such. B. a sliding bearing or derlangen be provided by means of which the drill collars 40 . 41 in the jacket pipes 30 . 31 are stored back and forth.

In the 1 and 2 It is good to see that the respective lower hydraulic cylinders 20 via connecting lines 56 each with a double-acting hydraulic cylinder 60 are connected. The second chamber of the double-acting hydraulic cylinder 60 is each with the hydraulic cylinder 20 at the opposite end of the drill collar 40 . 41 connected.

The space between the one cylinder bottom 61 of the double-acting hydraulic cylinder 60 and the one effective piston area 62 of the piston 65 is fluidly connected to the lower hydraulic cylinder, while the space between the opposite second cylinder bottom 64 of the double-acting hydraulic cylinder 60 and the second effective piston surface 63 fluidly with the other hydraulic cylinder 20 , and that at the top of the drill collar 40 . 41 , connected is.

The inventive method can be through the two positions in the 1 and 2 explain. In the in 1 shown orientation are the drill collars 40 . 41 in a substantially vertical position and are the lower hydraulic cylinders 20 at about the 6 o'clock position and the upper hydraulic cylinders 20 in about the 12 o'clock position. At the lower and upper hydraulic cylinders 20 are each shut-off valves 24 provided to the connection between the double-acting hydraulic cylinder 60 and the respective hydraulic cylinder 20 either open or close. In the 1 are the shut-off valves 24 the upper hydraulic cylinder 20 opened and the shut-off valves of the lower hydraulic cylinder 20 closed. Now the shut-off valves are opened 24 the lower hydraulic cylinder 20 at a defined rotational position, which may be, for example, between the 5 o'clock position and 6 o'clock position with a clockwise rotation, wherein the hydraulic fluid 51 in the lower hydraulic cylinders 20 due to the gravity of the respective drill collars 40 . 41 in the respective lower piston chamber of the double-acting hydraulic cylinder 60 over the connecting lines 56 is transported. As a result, the respective piston 65 of the respective double-acting hydraulic cylinder 60 , together with the mass M1, M2 coupled thereto, from a lower position P1 by the stroke length of the respective double-acting hydraulic cylinder 60 operated in an upper position P2.

It should be noted that the figures are merely schematic representations in order to explain the invention. In practice, the effective effective piston area is on each side of the piston 65 in conjunction with the effective piston volume of the double-acting hydraulic cylinder 60 above and below each piston surface 62 . 63 designed so that the product of inflowing hydraulic fluid (volume flow) and effective cylinder area of the piston is the same in both piston volumes of the double-acting hydraulic cylinder and not on one side by z. B. a piston rod is reduced.

If a connection to the respective mass M1, M2 is realized by means of a piston rod, a similar piston rod would likewise have to be provided on the opposite side of the piston, so that identical conditions are established on both sides.

When operating the piston 65 becomes at the same time a conveying of the hydraulic fluid 51 in the upper piston chamber of the double-acting hydraulic cylinder 60 over a connecting line 56 in each associated upper hydraulic cylinder 20 causes.

This means as in 2 shown that the drill collars 40 . 41 now in their lower position, while the masses M1, M2 are now in their respective upper position P2. After that, the upper shut-off valves 24 closed and the system can rotate in the diametrically opposite vertical position at the previously upper hydraulic cylinder 20 now in the lower position and the previously lower hydraulic cylinder 20 are in the upper position. As a result, this cycle can be repeated at a predetermined rate.

• - mittels der ankommenden komprimierten Hydraulikflüssigkeit die Massen M1, M2 nach oben zu befördern,
• - ferner die Hydraulikflüssigkeit aus den drucklosen Zylinderhälften in die sich oben stetig leerenden Hydraulikzylinder.

The double-acting hydraulic cylinders therefore have the functions:

• to convey the masses M1, M2 upwards by means of the incoming compressed hydraulic fluid,
• - Furthermore, the hydraulic fluid from the non-pressurized cylinder halves in the top of the constantly emptying hydraulic cylinder.

The design of the entire device, in particular the tuning of the stroke lengths of the cylinders and the stroke lengths of the double-acting hydraulic cylinders, the weights of the drill collars 40 . 41 as well as the masses M1, M2, and the concrete design of the hydraulic system and the hydraulic cylinder 20 . 60 is to be designed according to the desired topology of the system. In this case, it merely has to be taken into account that the functions according to the invention described above are implemented and in particular the weights, for example the drill collars, and the hydraulic friction losses occurring in the system are dimensioned so that the double-acting hydraulic cylinders are actuated upwards by the drill collars with the masses M1, M2 arranged on them.

The masses are therefore to be designed according to the capacity of the hydraulic system (the weights of the drill collars and the lifting height of the cylinders and the lifting height of the desired weights).

The 3 represents the position at which the device 11 has rotated by an angle of 90 ° in the clockwise direction.

With a rotation of the system in a clockwise direction about the axis of rotation D so that the distance of the movable weights M1, M2 to the center of the bearing has a significant impact on the smoothness and thus the imbalance between the left and right of the boom and thus on the torque or the efficiency of the system. Due to the fact that in each case an asymmetry between the center and each eccentrically resulting distances of the drill collars and the masses M1, M2 results with respect to the pivot point D, one obtains the desired torque or to be realized efficiency of the system depending on the concrete interpretation of the geometric and specific topology of the gravity hydraulic system.

The invention is not limited in its execution to the above-mentioned preferred specific embodiments. Rather, a number of variants is conceivable, which makes use of the illustrated solution even with fundamentally different types of use. In particular, therefore, the number of push rods can be changed as well as the number of weights. It would be conceivable, instead of a single weight M1, M2 each on one of the double-acting hydraulic cylinder 60 if necessary, attach one or more variable weights.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 4329964 A [0004]
• DE 29521296 U [0005]

Claims (11)

Gravity hydraulic device (1) for energetically utilizing the gravitational force of movably arranged masses (M1, M2) coupled to said gravity hydraulic device (1), said gravity hydraulic device (1) being rotatable about a rotation axis (D) through 360 ° mounted arrangement (11), as well as at least two jacket tubes (30,31) which are fixed with respect to the pivot center of the rotatably mounted arrangement (11) and which are each end connected to a hydraulic cylinder (20), wherein in the casing pipes ( 30, 31) depending on a drill collar (40, 41) in the radial direction (R) is reciprocally mounted and end effective movement with each a cylinder piston (21) of the hydraulic cylinder (20) is connected and a closed flow system (50) existing hydraulic fluid (51) via connecting tubes (53) of the flow system (50) in each case of the at one end of the jacket tubes (30, 31) arranged hydraulic cylinder (20) to the each at the opposite other end of the jacket tubes (30, 31) arranged hydraulic cylinder (20) by actuating the hydraulic cylinder to the cylinder stroke (L) by means of the gravity of the drill collars (40, 41) is conveyed. Gravity hydraulic device (1) according to Claim 1 , characterized in that the rotatably mounted arrangement (11) about a horizontally arranged shaft (10) is rotatably mounted and the radial mobility of the drill collar (40, 41) of the stroke length (HL) of the respectively connected hydraulic cylinder (20). Gravity hydraulic device (1) after Claim 1 or 2 , characterized in that each at one end of a jacket tube (30, 31) arranged hydraulic cylinder (20) with the respectively at the opposite other end of this jacket tube (30, 31) arranged hydraulic cylinder (20) via a double-acting hydraulic cylinder (60) fluidly effective wherein the space between the one cylinder bottom (61) of the double-acting hydraulic cylinder (60) and the one effective piston surface (62) of a piston (65) is fluidly connected to the one hydraulic cylinder (20) while the space between the opposite second Cylinder bottom (64) of the double-acting hydraulic cylinder (60) and the second effective piston surface (63) is fluidly connected to the other hydraulic cylinder (20). Gravity hydraulic device (1) after Claim 1 or 2 , characterized in that the connecting lines (56) of the hydraulic cylinder (20) to the double-acting hydraulic cylinder (60) via respective shut-off valves (24) at a certain time, in particular in a particular clock can be opened and closed. Gravity hydraulic device (1) after Claim 4 , characterized in that there is further provided a control which, depending on the relative position and / or angular position and / or rotational speed of the rotatably mounted arrangement (11) at least one or a group of shut-off valves (24) of the mounted on one side of the jacket tubes hydraulic cylinder (20) operate as intended, in particular open or close, while the controller simultaneously actuate at least one shut-off valve (24) or a group of shut-off valves (24) of the hydraulic cylinders on the opposite side of the casing pipes, in particular open or close. Gravity hydraulic device (1) according to one of Claims 3 to 5 , characterized in that in each case the piston (65) of the double-acting cylinder (60) is in each case coupled to one of the arranged masses (M1, M2), so that upon actuation of the piston (65) the masses (M1, M2) are each from one lower to an upper position can be operated. Gravity hydraulic device (1) according to one of Claims 1 to 5 , characterized in that the drill collars (40, 41) in the casing tubes (30, 31) are movably mounted in a liquid. Gravity hydraulic device (1) according to any one of the preceding claims, characterized in that the rotatable assembly (11) is equipped with an output, for connecting a rotating system to be driven. A method of realizing a rotating or rotatable driving equipment or machine using a gravity hydraulic device (1) according to any one of Claims 1 to 7 with the following steps: a. Rotating the rotatable assembly (11) clockwise or counterclockwise about its horizontally mounted pivot axis (D) until the orientation of the collars (40, 41) is substantially vertical and the lower hydraulic cylinders (20) are in a lower defined position and the upper ones Hydraulic cylinder are in an upper defined position, wherein the shut-off valves (24) of the upper hydraulic cylinder (20) open and the lower hydraulic cylinder (20) are closed; b. Opening the shut-off valves (24) of the lower hydraulic cylinders (20) at a defined rotational position, wherein the hydraulic fluid (51) in the lower hydraulic cylinders (20) due to the gravity of the drill collars (40, 41) in the lower piston chamber of the double-acting hydraulic cylinders (60) promoted is, whereby the respective piston (65) of the respective double-acting hydraulic cylinder (60) together with the mass (M1, M2) from a lower (P1) to an upper position (P2), operated by the stroke length of the respective double-acting hydraulic cylinder (60) become; c. whereby upon actuation of the piston (65) at the same time conveyance of the hydraulic fluid (51) via a connecting line (56) from the upper piston chamber of the double-acting hydraulic cylinder (60) in the respective connected upper hydraulic cylinder (20) is effected. Method according to Claim 9 in which, after step c), the upper shut-off valves (24) are closed and the upper hydraulic cylinders (20) are brought into a lower position by rotating the rotating assembly (11), at which the lower hydraulic cylinders (20) are in an upper position and the shut-off valves (24) of the now in the upper position hydraulic cylinder (20) are opened and the steps a) to c) from Claim 9 connect. Method according to Claim 9 and 10 , wherein said steps are repeated cyclically.

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