Hydraulic system for roller crusher and roller crusher for crushing materials

Abstract

The utility model provides a hydraulic system for a roller crusher and the roller crusher for crushing materials. A hydraulic system for a roller crusher comprises: at least one first main actuator connectable to a first movable bearing block of the roller crusher; at least one second main actuator connectable to a second movable bearing seat of the roll crusher; a first cross actuator operably coupled to the at least one first actuator; and a second cross cylinder operably coupled to the at least one second primary actuator. The first compression chamber of the first cross-cylinder is fluidly connected with the second rebound chamber of the second cross-cylinder, and the first rebound chamber of the first cross-cylinder is fluidly connected to the second compression chamber of the second cross-cylinder.

Description

Technical Field

[0001] The present disclosure relates to a roll crusher for material comminution and a hydraulic system for the roll crusher. Background Art

[0002] Roll crushers are used for the comminution of materials, such as ore. The comminution of the material takes place between two rollers, which together define a crushing gap into which the material to be comminuted is introduced. The rollers are mounted on the frame via bearing seats. Each roller can be provided with one, two or more independent bearing seats. During the comminution of the material, huge forces are constantly exerted on the material, which in turn causes the rollers to crush the material. In order to ensure that the roller crusher is not damaged by these forces, one of the rollers is mounted in a fixed bearing seat (i.e. a bearing seat fixed relative to the frame) and the other roller is mounted in a movable bearing seat (i.e. a bearing seat that can be moved relative to the frame). Therefore, the roller crusher comprises a movable roller and a fixed roller. Therefore, when a large load is applied to the roller, the movable roller can move away from the fixed roller, which enlarges the crushing gap and reduces the load. However, in order to ensure that the movable roller returns to its optimal crushing position and transmits sufficient crushing pressure during operation, the floating roller is biased towards the fixed roller via a hydraulic system. The hydraulic system biases the movable roller by transmitting a force to the movable bearing seat of the movable roller. However, since these movable bearing seats are independent of each other, the movement of the movable roller may cause skewing, i.e. the two rollers become non-parallel. Skewness may occur, for example, if the feed of material is unevenly distributed when entering the crushing gap, or if material with different characteristics (such as moisture content) enters the crusher, or if a crossover event occurs.

[0003] Deflection of the floating roller may impair the seal, and in some cases, when multiple flanges are mounted on one of the rollers, the deflection may cause undesirable contact between the roller and the flange. Therefore, it is difficult to use a flanged roller if deflection is a problem. Utility Model Content

[0004] An object of the present invention is to provide a solution for preventing or at least reducing deflection in a roller crusher which solution is more flexible and easily adaptable to various roller crushers.

[0005] According to a first aspect, this and other objects are achieved by a hydraulic system for a roller crusher, the hydraulic system comprising: a frame; a fixed roller supported by one or more fixed bearing seats fixed relative to the frame; a movable roller supported by a first movable bearing seat and a second movable bearing seat movable relative to the frame; and wherein the fixed roller and the movable roller define a crushing gap for receiving material to be crushed, the hydraulic system comprising:

[0006] at least one first master actuator connectable to the first movable bearing seat, the at least one first master actuator each comprising: a first master cylinder having a first master hydraulic chamber formed therein; and a first master piston extending into the first master cylinder, wherein the at least one first master actuator is configured to apply a force along a first axis to generate a force acting on the first movable bearing seat,

[0007] at least one second master actuator connectable to the second movable bearing seat, the at least one second master actuator each comprising: a second master cylinder having a second master hydraulic chamber formed therein; and a second master piston extending into the second master cylinder, wherein the at least one second master actuator is configured to apply a force along a second axis parallel to the first axis, thereby generating a force acting on the second movable bearing seat,

[0008] A first crossing actuator includes: a first crossing cylinder having a first synchronous hydraulic chamber formed therein; and a first synchronous piston extending into the first synchronous hydraulic chamber, wherein the first synchronous piston includes a first synchronous piston element that separates the first synchronous hydraulic chamber into a first compression chamber and a first rebound chamber,

[0009] The second crossover actuator comprises: a second crossover cylinder having a second synchronous hydraulic chamber formed therein; and a second synchronous piston extending into the second synchronous hydraulic chamber, wherein the second synchronous piston comprises a second synchronous piston element that divides the second synchronous hydraulic chamber into a second compression chamber and a second rebound chamber,

[0010] wherein the first crossover actuator is operably coupled to at least one first main actuator and the second crossover actuator is operably coupled to at least one second main actuator, and

[0011] Wherein the first compression chamber is fluidly connected to the second rebound chamber, and the first rebound chamber is fluidly connected to the second compression chamber.

[0012] Therefore, a hydraulic system is provided, wherein the movement of the first master piston of at least one first main actuator and the second master piston of at least one second main actuator are each synchronized via an operative connection with a first cross actuator and a second cross actuator. This movement of the synchronized piston is synchronized by a first rebound chamber (which is fluidically connected to the second compression chamber) and a second rebound chamber (which is fluidically connected to the first compression chamber), so that when the volume of the first rebound chamber is compressed, for example when the first synchronized piston moves along the first axis, the fluid is transferred to the second compression chamber, which expands the volume of the second compression chamber, thereby causing the second synchronized piston to move synchronously with the first synchronized piston. In addition, since the main actuator is operably connected to the cross actuator, the movement of these actuators is also synchronized. Synchronizing the movement between the actuators ensures that when the hydraulic system is connected to the roller crusher, the movement of the movable bearing seat is synchronized, thereby avoiding the deflection of the roller. In addition, only the main actuator needs to provide the crushing force applied along the first axis and the second axis, while the cross actuator only needs to synchronize the movement of the different pistons. This further simplifies the hydraulic wiring required for the hydraulic system.

[0013] The first synchronous hydraulic chamber and the second synchronous hydraulic chamber are preferably formed to have the same size so that the volumes of the first compression chamber and the first rebound chamber respectively match the volumes of the second compression chamber and the second rebound chamber.

[0014] In the context of the present disclosure, when components are described as being operably coupled, it is understood that when the components are operated, they are mechanically coupled together. Therefore, the operability coupling between at least one main actuator and its associated cross actuator used herein means that a change in the displacement length of at least one main actuator will cause the same change in the displacement length of the cross actuator to which it is operably coupled, and vice versa. This means that the first cross actuator is configured to apply a force along a first axis, while the second cross actuator is configured to apply a force along a second axis. As will be readily appreciated by those skilled in the art, this can be achieved by connecting the main piston of the main actuator to the synchronizing piston of the associated cross actuator. However, it can also be achieved by connecting the main piston of the main actuator to the cross cylinder of the associated cross actuator. In other words, the cylinder may not have to be arranged in the reference frame of the movable bearing seat. Instead, the piston may be "fixed" (i.e., in the reference frame of the roll crusher frame), and its associated cylinder may be arranged to move with the movable bearing seat. Alternatively, at least one main actuator and its associated cross actuator may be operably coupled to each other while being spaced apart. For example, at least one main actuator and its associated cross actuator may be arranged in parallel with each other, each being individually coupled to the movable bearing block. As will be readily appreciated by those skilled in the art, any movement of the movable bearing block will result in the same movement of the at least one main actuator and its associated cross actuator.

[0015] In the context of the present disclosure, when components are described as being connected, it is not only to be interpreted as a direct connection between components, but the connection may also be an indirect connection achieved via an intermediate component. Such an intermediate component may be a bracket, a gasket, etc., but may also be a larger component, such as the movable bearing seat detailed above.

[0016] According to some embodiments, the first master piston of the at least one first master actuator is configured to transfer force to the first synchronization piston along the first axis and / or the second master piston of the at least one second master actuator is configured to transfer force to the second synchronization piston along the second axis.

[0017] This may be beneficial as it simplifies the construction, as the master cylinder and the cross-cylinder may be fixed relative to each other, thus making the communication of the hydraulic fluid between the cylinders less technically demanding.

[0018] The master cylinder and the synchronization cylinder of at least one main actuator can be operatively connected without forming a connection lock between them. Not locking the master piston and the synchronization piston together can simplify the assembly and disassembly of the hydraulic system, which can prove to be particularly advantageous when installing the hydraulic system on a roll crusher.

[0019] According to some embodiments, at least one first main actuator is a first main actuator, and wherein the first main actuator and the first cross actuator are coaxially arranged relative to each other around a first axis, and / or at least one second main actuator is a second main actuator, and wherein the second main actuator and the second cross actuator are coaxially arranged relative to each other around a second axis.

[0020] This is an example of an embodiment with only one first main actuator and only one second main actuator. Thus, there is a pair of main actuators and associated cross actuators on each side of the roll crusher. As will be seen later, the present disclosure is not limited to these embodiments, and it is conceivable that more than one main actuator is provided on each side of the roll crusher.

[0021] This means that the first main hydraulic chamber and the first synchronous hydraulic chamber extend radially outward from the first axis together. In other words, one of the first main hydraulic chamber and the first synchronous hydraulic chamber can be arranged in a central portion intersecting the first axis, and the other of the first main hydraulic chamber and the first synchronous hydraulic chamber can surround the first axis radially outward therefrom.

[0022] The coaxial arrangement means that one of the main actuator and the cross actuator has a hollow central portion on its exterior, and the other of the main actuator and the cross actuator is arranged within the hollow central portion.

[0023] Thus, a very space-saving arrangement is achieved between the main actuator and the crossover actuator. Furthermore, the coaxial arrangement can further facilitate the operative coupling between the synchronous actuator and the main actuator.

[0024] According to some embodiments, the first main actuator is arranged radially outwardly with respect to the first cross-actuator and / or the second main actuator is arranged radially outwardly with respect to the second cross-actuator.

[0025] This means that the first main actuator surrounds the first cross-actuator and the second main actuator surrounds the second cross-actuator.A radial direction is defined herein with reference to the first axis and the second axis, respectively.

[0026] It may be advantageous to position the main actuator radially outward from the cross-cylinder because this allows the main actuator to more easily reach the hydraulic system.

[0027] According to some embodiments, the first master cylinder has an annular cross section and the first cross cylinder has a circular cross section and / or wherein the second master cylinder has an annular cross section and the second cross cylinder has a circular cross section. The cross sections are defined to be transverse to the first axis and the second axis, respectively.

[0028] This means that the first master cylinder and / or the second master cylinder is in the shape of a hollow cylinder extending from an inner diameter to an outer diameter, thereby defining an outer opening in the center thereof. The axis of symmetry of the hollow cylinder is the first axis or the second axis, respectively.

[0029] According to some embodiments, the first cross-actuator is arranged radially outwardly relative to the first main actuator and / or the second cross-actuator is arranged radially outwardly relative to the second main actuator.

[0030] This means that the first cross actuator surrounds the first main actuator and the second cross actuator surrounds the second main actuator.This radial direction is defined herein with reference to the first axis and the second axis, respectively.

[0031] It may be advantageous to position the main actuator radially outward from the crossover cylinder as this allows for easier access to the hydraulic system by the crossover actuator.

[0032] According to some embodiments, the first master cylinder has a circular cross-section and the first cross-cylinder has an annular cross-section, wherein the second master cylinder has a circular cross-section and the second cross-cylinder has an annular cross-section.

[0033] This means that the first cross cylinder and / or the second cross cylinder is in the shape of a hollow cylinder extending from an inner diameter to an outer diameter, thereby defining an outer opening in its center. The axis of symmetry of the hollow cylinder is the first axis or the second axis, respectively.

[0034] According to some embodiments, at least one first main actuator is a first main actuator, which is axially arranged one after another with the first cross actuator along the first axis, and at least one second main actuator is a second main actuator, which is axially arranged one after another with the second cross actuator along the second axis.

[0035] This is another example of an embodiment with only one first main actuator and one second main actuator. Thus, there is a pair of main actuators and associated cross actuators on each side of the roll crusher. As will be seen later, the present disclosure is not limited to these embodiments, and it is conceivable that more than one main actuator is provided on each side of the roll crusher.

[0036] This means that the first main actuator and the first cross actuator extend linearly along the first direction. This also means that the second main actuator and the second cross actuator extend linearly along the second direction.

[0037] The first master actuator may be operably coupled to the first crossover actuator by the first master piston being connected, coupled or attached to the first crossover piston along the first axis.

[0038] This axial arrangement may be beneficial because it allows easier access to the main actuator and the crossover actuator from the outside. Maintenance may be easier because the master cylinder and crossover cylinder do not need to be disassembled. From a structural point of view, the axial arrangement may be beneficial because it allows the master cylinder to be smaller in size.

[0039] According to some embodiments, the frame comprises a support structure for the hydraulic system, the support structure having a first side facing the movable roller and an opposite second side facing away from the movable roller.

[0040] According to some embodiments, the first master cylinder is configured to be arranged on a first side of the support structure and the first cross cylinder is configured to be arranged on a second side of the support structure, and wherein the first master piston and the first synchronization piston are configured to be interconnected to each other via a first opening of the support structure, and

[0041] wherein the second master cylinder is configured to be arranged on a first side of the support structure, the second cross cylinder is configured to be arranged on a second side of the support structure, and wherein the second master piston and the second synchronization piston are configured to be connected to each other via a second opening of the support structure.

[0042] The first opening and / or the second opening may be a through hole or a through opening formed in the support structure. Such a through hole or a through opening may extend along the first axis and / or the second axis and interconnect the first side and the second side of the support structure. Alternatively, the first opening and / or the second opening may be a slot formed in the support structure from a direction transverse to the first axis and / or the second axis. Those skilled in the art recognize that there are many alternative ways to allow for an operable connection between the main actuator and the cross actuator when the main actuator and the cross actuator are disposed on opposite sides of the support structure.

[0043] Arranging the main actuator and the cross actuator on opposite sides of the support structure may be beneficial as this allows the two actuators to be separated from each other, thereby facilitating easier maintenance. Arranging the cross cylinder on the second side facing away from the movable roller may further help protect the cross cylinder from hitting the crushing material.

[0044] According to some embodiments, the at least one first main actuator comprises two first main actuators, which are configured to be arranged on the first movable bearing seat in parallel with each other and vertically offset from each other.

[0045] The at least one second main actuator comprises two second main actuators, which are arranged parallel to each other and vertically offset from each other on the second movable bearing seat.

[0046] wherein the first cross actuator may be connected to the first movable bearing seat and is configured to be arranged between the two first main actuators in parallel with the two first main actuators, and

[0047] The second cross actuator may be connected to the second movable bearing seat and configured to be arranged between the two second main actuators in parallel with the two second main actuators.

[0048] This is an example of an embodiment with more than one main actuator on each side of the roll crusher.As will be readily appreciated by those skilled in the art, a roll crusher may have one, two or even more actuators on each side of the roll crusher for controlling the movement of the movable roll.

[0049] The two main actuators on each side can be constructed and configured so that the respective forces they exert on the movable bearing seat on that side have the same or at least approximately the same magnitude. This means that the two main actuators on each side can have the same size and / or the same characteristics. Thus, the two main actuators can be of the same type, or even identical to each other.

[0050] This embodiment may be advantageous because it allows the main actuator and the cross actuator to be physically separated from each other while still maintaining a uniform load distribution on the movable bearing seat. By arranging the main actuators parallel to each other and vertically offset on the movable bearing seat, and by controlling each of the two main actuators so that they apply the same amount of force to the movable bearing seat, the resultant force on the movable bearing seat will be located between the two main actuators. By arranging the cross actuator at the same location, the main actuator and the cross actuator can be operably coupled to each other using a uniform force distribution (even if they are not physically arranged linearly along the first axis / second axis).

[0051] According to some embodiments, the frame comprises a support structure for the hydraulic system, the support structure having a first side facing the movable roller and an opposite second side facing away from the movable roller,

[0052] wherein the first master cylinders of the two first master actuators are configured to be arranged on a first side of the support structure and the first cross cylinder is configured to be arranged on a second side of the support structure, and wherein the first synchronization piston is connectable to the first movable bearing seat via a first opening of the support structure, and

[0053] Therein, the second master cylinders of the two second master actuators are configured to be arranged on a first side of the support structure, and the second cross cylinder is configured to be arranged on a second side of the support structure, and wherein the second synchronization piston can be connected to the second movable bearing seat via a second opening of the support structure.

[0054] The first opening and / or the second opening may be a through hole or a through opening formed in the support structure. Such a through hole or a through opening may extend along the first axis and / or the second axis and interconnect the first side and the second side of the support structure. Alternatively, the first opening and / or the second opening may be a groove formed in the support structure from a direction transverse to the first axis and / or the second axis. Those skilled in the art recognize that when the main actuator and the cross actuator are arranged on opposite sides of the support structure, there are many alternative ways to allow an operable connection between the main actuator and the cross actuator.

[0055] Arranging the main actuator and the cross actuator on opposite sides of the support structure may be beneficial because it allows further separation of the main actuator from the cross actuator, thereby facilitating easier maintenance of each actuator. Arranging the cross cylinder on the second side facing away from the movable roller may further help protect the cross cylinder from hitting the crushing material.

[0056] Alternatively, the cross cylinder may be arranged on the same side as the main cylinder, ie on the first side of the support structure.

[0057] According to some embodiments, the first master cylinder and the first cross cylinder of the two first master actuators are each configured to be arranged on a first side of the support structure, and

[0058] The second master cylinder and the second cross cylinder of the two second master actuators are each configured to be arranged on the first side of the support structure.

[0059] This may be advantageous because it eliminates the need for openings in the support structure. It may also provide a more compact hydraulic system.

[0060] Needless to say, there are many ways to operably couple the cross actuator to at least one main actuator. As yet another example, the cross actuator can be configured to be disposed between and interconnect the fixed bearing seat and the movable bearing seat. As will be readily appreciated by those skilled in the art, the same principles will apply to other embodiments, as any movement of the movable bearing seat will cause the gap between the fixed bearing seat and the movable bearing seat to change. If the cross cylinder is disposed between and interconnects the fixed bearing seat and the movable bearing seat, the synchronization piston will move relative to the cross cylinder, thereby causing the fluid to move to the opposite cross cylinder.

[0061] According to some embodiments, the first synchronization piston may be connected to the first movable bearing seat via a first bracket, and wherein the second synchronization piston may be connected to the second movable bearing seat via a second bracket.

[0062] By having a dedicated bracket for each synchronization piston, it is easier to mount the hydraulic system on the roll crusher. As an exemplary embodiment, the synchronization piston is directly connected to the movable bearing seat via the bracket. This means that the synchronization piston extends through an opening in the frame. However, it is also conceivable that the synchronization piston is connected to the bracket via an intermediate structure, such as a lever.

[0063] According to some embodiments, the total cross-sectional area of ​​the first master hydraulic chamber of at least one first main actuator is 1.5 to 9 times larger than the cross-sectional area of ​​the first synchronous hydraulic chamber, and the total cross-sectional area of ​​the second master hydraulic chamber of at least one second main actuator is 1.5 to 9 times larger than the cross-sectional area of ​​the second synchronous hydraulic chamber.

[0064] The applicant has found that by making the total cross-sectional area of ​​at least one first main hydraulic chamber 1.5 to 9 times larger than the cross-sectional area of ​​the first synchronous hydraulic chamber, the hydraulic chamber can transmit sufficient force to the roller crusher without increasing the diameter compared with the conventional hydraulic system currently installed on the roller crusher. Therefore, the modification of the hydraulic system is facilitated and the changes required for manufacturing the hydraulic system and the manufacturing equipment of the roller crusher having the hydraulic system according to the utility model are minimized.

[0065] According to some embodiments, the fluid connection between the first compression chamber and the second rebound chamber forms a first closed fluid circuit, and the fluid connection between the first rebound chamber and the second compression chamber forms a second closed fluid circuit.

[0066] Thus, synchronization of the movement of the pistons can be achieved automatically without the need for external control, since the operation of the cross cylinders will always be synchronized. This also further simplifies the hydraulic wiring required in the system. In some cases, a pressure reducing valve can be connected to the first closed fluid circuit and the second closed fluid circuit to have a failsafe.

[0067] According to some embodiments, the hydraulic system comprises one or more hydraulic accumulators fluidly connected to a respective first master hydraulic chamber of the at least one first master actuator and / or a respective second master hydraulic chamber of the at least one second master actuator.

[0068] The hydraulic accumulator may help provide additional force to the master cylinder and / or stabilize the force transmitted by the master cylinder.

[0069] According to some embodiments, the first synchronization piston and the first synchronization piston element are integrally connected, and the second synchronization piston and the second synchronization piston element are integrally connected.

[0070] Thus, it is ensured that the piston element does not move relative to the synchronizing piston, thereby ensuring that the movement of the synchronizing piston is synchronized when the fluid moves between the rebound chamber and the compression chamber. Alternatively, the piston element can be provided as a seal on the synchronizing piston. Providing the piston element as a seal can simplify the manufacture of the synchronizing piston, because the seal can be added to a wide variety of pistons. In addition, the seal is inexpensive and easy to replace after wear.

[0071] According to some embodiments, the first cross-cylinder is engaged with the first master cylinder to prevent the first cross-cylinder from moving relative to the first master cylinder in a first plane perpendicular to the first axis, and / or the second cross-cylinder is engaged with the second master cylinder to prevent the second cross-cylinder from moving relative to the second master cylinder in a second plane perpendicular to the second axis.

[0072] The cross cylinder can be engaged with the corresponding master cylinder in different ways. They can be attached to each other, geometrically locked to each other, or even formed integrally from the same element.

[0073] During operation of a roll crusher, there are large forces that may cause vibrations or lateral forces, which may move the cylinders relative to each other, potentially affecting the synchronization of the movement between the main pistons. Therefore, by preventing the movement of the cross cylinder relative to the main cylinder, these negative effects can be eliminated or at least reduced.

[0074] According to some embodiments, the first master piston is connected to the first synchronization piston and / or the second master piston is connected to the second synchronization piston.

[0075] Thus, the master cylinder is allowed to be operably coupled to the cross cylinder. By connecting the master piston and the synchronization piston together, it is ensured that the movement of the master piston is always synchronized by the cross cylinder. The connection between the master piston and the synchronization piston can be achieved by a bolt connection or a locking engagement (e.g. a male-female connection).

[0076] According to some embodiments, the first master piston is integrally connected to the first synchronization piston, and / or the second master piston is integrally connected to the second synchronization piston.

[0077] The integral connection can ensure that the master cylinder and the synchronization cylinder are operatively coupled. The integral connection can be achieved by forming the master piston and the synchronization piston together, or by welding the master piston and the synchronization piston together.

[0078] According to some embodiments, the first master cylinder and the first cross-cylinder are integrally formed as a first one-piece element and / or the second master cylinder and the second cross-cylinder are integrally formed as a second one-piece element.

[0079] According to a second aspect of the utility model, a roller crusher for crushing materials is provided, the roller crusher comprising:

[0080] frame,

[0081] The fixed roller is supported by a fixed bearing seat, wherein the fixed bearing seat is fixed relative to the frame,

[0082] a movable roller supported by a movable bearing seat, wherein the movable bearing seat is movable relative to the frame, wherein the fixed roller and the movable roller define a crushing gap for receiving the material to be crushed, and

[0083] According to the hydraulic system of the first aspect of the present invention, the hydraulic system is configured to transmit force to the movable bearing seat to bias the movable roller toward the fixed roller.

[0084] Different aspects of the present invention can be implemented in the different ways described above and below, each aspect produces one or more benefits and advantages described in combination with at least one aspect above, and each aspect has one or more preferred embodiments corresponding to the preferred embodiments described in combination with at least one aspect disclosed in the above and / or dependent claims.

[0085] Furthermore, it should be understood that implementations described in conjunction with one aspect described herein may also be applicable to other aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0086] With reference to the accompanying drawings, the above and / or additional objects, features and advantages of the present invention will be further illustrated by the following illustrative and non-limiting detailed description of the embodiments of the present invention, in which:

[0087] Figure 1 A three-dimensional schematic diagram of an embodiment of a roller crusher according to the second aspect of the utility model is depicted.

[0088] Figure 2 A schematic cross-sectional top view of an embodiment of a hydraulic system according to the first aspect of the present invention is shown, which is connected to a movable bearing seat of a roll crusher.

[0089] Figure 3A Draws Figure 2 Schematic cross-sectional top view of a first master cylinder of a hydraulic system.

[0090] Figure 3B Draw along the Figure 3A Schematic cross-sectional view of a section taken along line X1-X1.

[0091] Figure 3C Draws Figure 2 Schematic cross-sectional top view of the first cross-cylinder of the hydraulic system.

[0092] Figure 3D Draw along the Figure 3C Schematic cross-sectional view of a section taken along line X2-X2.

[0093] Figure 4 A schematic cross-sectional top view of another embodiment of a hydraulic system according to the first aspect of the present invention is shown, which is connected to a movable bearing seat of a roll crusher.

[0094] Figure 5A Draws Figure 4 Schematic cross-sectional top view of a first master cylinder of a hydraulic system.

[0095] Figure 5B Draw along the Figure 5A Schematic cross-sectional view of a section taken along line X3-X3.

[0096] Figure 5C Draws Figure 4 Schematic cross-sectional top view of the first cross-cylinder of the hydraulic system.

[0097] Figure 5D Draw along the Figure 5C Schematic cross-sectional view of a section taken along line X4-X4.

[0098] Figure 6 A schematic cross-sectional top view of a further embodiment of a hydraulic system according to the first aspect of the present invention is shown, which is connected to a movable bearing seat of a roll crusher.

[0099] Fig. 7A Draws Figure 6 Schematic cross-sectional top view of a first master cylinder of a hydraulic system.

[0100] Figure 7B Draw along the Fig. 7A Schematic cross-sectional view of the section taken along line X5-X5.

[0101] Figure 7C Draws Figure 6 Schematic cross-sectional top view of the first cross-cylinder of the hydraulic system.

[0102] Fig.7D Draw along the Figure 7C Schematic cross-sectional view of the section taken along line X6-X6.

[0103] Figure 8 A perspective schematic diagram of another embodiment of a roller crusher according to the second aspect of the utility model is depicted, wherein the roller crusher is equipped with another embodiment of a hydraulic system according to the utility model.

[0104] Fig. 9 Draws a diagram of the connection to Figure 8 The movable bearing seat of the roller crusher Figure 8 Schematic cross-sectional side view of a hydraulic system. Fig. 9 Each side of the roll crusher is shown separately. DETAILED DESCRIPTION

[0105] The present invention will now be described more fully below with reference to the accompanying drawings, in which the present preferred embodiments of the present invention are shown. However, the present invention can be implemented in many different forms and should not be interpreted as being limited to the embodiments set forth herein; on the contrary, these embodiments are provided to be comprehensive and complete and to convey the scope of the present invention to the technician.

[0106] First refer to Figure 1, which depicts a schematic stereoscopic view of an embodiment of a roller crusher 2 according to the second aspect of the utility model. The roller crusher 2 is used to crush materials such as ore. The roller crusher 2 includes a frame 21 supporting two rollers 22 and 23 of the roller crusher 2. The two rollers 22 and 23 are a fixed roller 23 and a movable roller 22. The fixed roller 23 is supported by a fixed bearing seat 25. The fixed bearing seat 25 is placed on the frame 21. The fixed bearing seat 25 is fixed relative to the frame 21. The movable roller 22 is supported by two movable bearing seats 31 and 32. A first movable bearing seat 31 and a second movable bearing seat 32. The two movable bearing seats 31 and 32 are movable relative to the frame 21. The first movable bearing seat 31 is movable along a first axis A1, and the second movable bearing seat 32 is movable along a second axis A2. In the illustrated embodiment, the first axis A1 is parallel to the second axis A2. The fixed roller 23 and the movable roller 22 define a crushing gap 26 for receiving the material to be crushed. The hydraulic system 100 is connected to the two movable bearing seats 31 and 32. The hydraulic system 100 is only one of many exemplary embodiments disclosed herein, and those skilled in the art will recognize how the exemplary embodiments disclosed later can be arranged on the roller crusher according to the second aspect. The hydraulic system 100 is configured to transmit force to the movable bearing seats 31 and 32 to bias the movable roller 22 toward the fixed roller 23. During operation, the movable roller 22 can move along the first axis A1 and the second axis A2 to increase or decrease the crushing gap 26 between the fixed roller 23 and the movable roller 22. Now refer to Figure 2 and FIG. 3A to FIG. 3D The hydraulic system 100 is explained in more detail.

[0107] Reference Figure 2, which depicts a schematic cross-sectional top view of an embodiment of a hydraulic system 100 according to the first aspect of the present disclosure, the hydraulic system 100 being connected to the movable bearing seats 31 and 32 of a roll crusher (e.g., roll crusher 2). The hydraulic system 100 comprises a first main actuator 101 and a second main actuator 103. The first main actuator 101 and the second main actuator 103 are each indirectly connected to the first movable bearing seat 31 and the second movable bearing seat 32. The hydraulic system 100 is an example of a hydraulic system according to the present invention, which is based on providing one main actuator for each movable bearing seat (i.e., providing one main actuator for each side of the roll crusher). However, the hydraulic system according to the present invention is not limited to these embodiments, and alternative embodiments having more than one main actuator for each movable bearing seat will be described in detail later. The indirect connection of the first main actuator 101 is achieved via the first synchronization piston 122, and the indirect connection of the second main actuator 103 is achieved via the second synchronization piston 142. The first synchronization piston 122 and the second synchronization piston 142 are respectively in abutment with the first movable bearing seat 31 and the second movable bearing seat 32. Alternatively, the first main actuator 101 and the second main actuator 103 may be respectively directly connected to the first movable bearing seat 31 and the second movable bearing seat 32. The connection between the first movable bearing seat 31 and the first main actuator 101 ensures that when the first main actuator 101 generates a force toward the first movable bearing seat 31 along the first axis A1, a force acting on the first movable bearing seat 31 is generated. The connection between the second movable bearing seat 32 and the second main actuator 103 ensures that when the second main actuator 103 generates a force toward the second movable bearing seat 32 along the second axis A2, a force acting on the second movable bearing seat 32 is generated. The first main actuator 101 and the second main actuator 103 each include a first master cylinder 110 and a second master cylinder 130. The first master actuator 101 and the second master actuator 103 further each include a first master piston 111 and a second master piston 131. The first master piston 111 and the second master piston 131 can each move along the first axis A1 and the second axis A2. The first master piston 111 is used to apply a force along the first axis A1, thereby generating a force acting on the first movable bearing seat 31. The second master piston 131 is used to apply a force along the second axis A2, thereby generating a force acting on the second movable bearing seat 32. The first master cylinder 110 and the second master cylinder 130 each have a first master hydraulic chamber 112 for controlling the force applied by the first master piston 111 and a second master hydraulic chamber 132 for controlling the force applied by the second master piston 131. The first master hydraulic chamber 112 and the second hydraulic chamber 132 are configured to accommodate a pressurized fluid, such as hydraulic oil. The pressurized fluid present in the first hydraulic chamber 112 is configured to transfer the fluid force to the first master piston 111, so that the first master piston 111 transfers the force to the first movable bearing seat 31.The pressurized fluid present in the second hydraulic chamber 132 is configured to transfer a fluid force to the second master piston 131, thereby causing the second master piston 131 to transfer a force to the second movable bearing seat 32. In the illustrated embodiment, the fluid and the fluid pressure in the first master hydraulic chamber 112 and the second master hydraulic chamber 132 can be controlled via the first hydraulic line 19 and the second hydraulic line 20, respectively. The first hydraulic line 19 fluidly connects the first master hydraulic chamber 112 to the controller 15, and the second hydraulic line 20 fluidly connects the second master hydraulic chamber 132 to the controller 15. The controller 15 can control the fluid and the fluid pressure in the first master hydraulic chamber 112 and the second master hydraulic chamber 132. The controller 15 can control the fluid and the fluid pressure via the hydraulic device 16 (e.g., one or more pumps and / or one or more accumulators fluidly connected to the first hydraulic line 19 and the second hydraulic line 20). In other embodiments, the first master hydraulic chamber 112 and / or the second master hydraulic chamber 132 are pressurized and fluid-sealed, thereby allowing the first main actuator 101 and / or the second main actuator 103 to each provide a constant force to the first movable bearing seat 31 and / or the second movable bearing seat 32 .

[0108] The hydraulic system 100 further includes a first cross actuator 102 and a second cross actuator 104, each connected to the first movable bearing seat 31 and the second movable bearing seat 32. In the illustrated embodiment, the first cross actuator 102 and the second cross actuator 104 are each directly connected to the first movable bearing seat 31 and the second movable bearing seat 32. Alternatively, the first cross actuator 102 and / or the second cross actuator 104 may each be indirectly connected to the first movable bearing seat 31 and / or the second movable bearing seat 32. The indirect connection may be achieved via a gasket or via the master pistons 111 and 131. The first cross actuator 102 includes a first cross cylinder 120 and a first synchronization piston 122. The second cross actuator 104 includes a second cross cylinder 140 and a second synchronization piston 142. The first cross cylinder 120 has a first synchronization hydraulic chamber 121, and the second cross cylinder 140 has a second synchronization hydraulic chamber 141. The first synchronization piston 122 and the second synchronization piston 142 may each be movable along the first axis A1 and the second axis A2. The first synchronization piston 122 abuts the first movable bearing seat 31, thereby forming a connection between the first cross actuator 102 and the first movable bearing seat 31. The first synchronization piston 122 is used to apply a force along the first axis A1, thereby generating a force acting on the first movable bearing seat 31. The second synchronization piston 142 abuts the second movable bearing seat 32, thereby forming a connection between the second cross actuator 104 and the second movable bearing seat 32. The second synchronization piston 142 is used to apply a force along the second axis A2, thereby generating a force acting on the second movable bearing seat 32. For the exemplary embodiment, the first synchronization piston 122 and the second synchronization piston 142 are each operably coupled to the first master piston 111 and the second master piston 131. In the illustrated embodiment, the operably coupled is achieved by the master pistons 111 and 131, and the master pistons 111 and 131 are configured to transmit forces along the first axis A1 and the second axis A2 to the synchronization pistons 122 and 142. In the illustrated embodiment, this is achieved by the first and second master pistons 111 and 131 being in direct abutment with the first and second synchronization pistons 122 and 142, respectively. Alternatively, a gasket or the like may be placed between the master pistons 111 and 131 and the synchronization pistons 122 and 142. Alternatively, the operative coupling may be achieved by connecting the master pistons 111 and 131 to the synchronization pistons 122 and 142, for example, via bolting or welding. The operative coupling facilitates synchronization of the movement of the master pistons 111 and 131 with the movement of the synchronization pistons 122 and 142, for example, when the material in the crushing gap 26 generates a high load, the operative coupling ensures that the master pistons 111 and 131 move synchronously with the synchronization pistons 122 and 142. The first and second synchronization pistons 122 and 142 each extend into the first and second synchronization hydraulic chambers 121 and 141.The first synchronous piston 122 and the second synchronous piston 142 each include a first synchronous piston element 123 and a second synchronous piston element 143. The first synchronous piston element 123 divides the first synchronous hydraulic chamber 121 into a first compression chamber 124 and a first rebound chamber 125. The second synchronous piston element 143 divides the second synchronous hydraulic chamber 141 into a second compression chamber 144 and a second rebound chamber 145. Therefore, when the first synchronous piston 122 moves along the first axis A1, the first synchronous piston element 123 also moves along the first axis A1. The movement of the first synchronous piston element 123 along the first axis A1 changes the volume of the first compression chamber 124 and the first rebound chamber 125. When the second synchronous piston 142 moves along the second axis A2, the second synchronous piston element 143 also moves along the second axis A2. The movement of the second synchronous piston element 143 along the second axis A2 changes the volume of the second compression chamber 144 and the second rebound chamber 145.

[0109] The first cross-actuator 102 and the second cross-actuator 104 are identical in structure in the illustrated embodiment. However, the first cross-actuator 102 and the second cross-actuator 104 may be different in structure from each other.

[0110] The first compression chamber 124 is fluidly connected to the second rebound chamber 145 via the first synchronization hydraulic line 17. The first rebound chamber 125 is fluidly connected to the second compression chamber 144 via the second synchronization hydraulic line 18. The fluid connection between the compression chambers 124 and 144 and the rebound chambers 125 and 145 synchronizes the movement of the first synchronization piston 122 and the second synchronization piston 142. The movement of the first synchronization piston 122 and the second synchronization piston 142 is synchronized by the fluid connection between the compression chambers 124 and 144 and the rebound chambers 125 and 145, and the volume ratio between the volume of the first rebound chamber 125 and the second compression chamber 144 and the volume of the second rebound chamber 145 and the first compression chamber 124 is kept constant. This constant volume ratio ensures that the first synchronization piston 122 and the second synchronization piston 142 move synchronously with each other. Therefore, when the first compression chamber 124 is compressed, due to the movement of the first synchronization piston 122, the fluid is transferred from the first compression chamber 124 to the second rebound chamber 145, thereby expanding the second rebound chamber 145 and causing the compression of the second compression chamber 144, thereby causing the second synchronization piston 142 to move synchronously with the first synchronization piston 122. Therefore, the fluid connection between the compression chambers 124 and 144 and the rebound chambers 125 and 145 ensures that the synchronization pistons 122 and 142 move synchronously with each other. In the exemplary embodiment shown, the first fluid connection 17 between the first compression chamber 124 and the second rebound chamber 145 forms a first closed fluid circuit, and the second fluid connection 18 between the first rebound chamber 125 and the second compression chamber 144 forms a second closed fluid circuit.

[0111] Now refer to FIG. 3A to FIG. 3D ,in Figure 3A Draw the basis Figure 2 A schematic cross-sectional top view of a first main actuator 101 of an exemplary embodiment of Figure 3B A schematic cross-sectional view of the main actuator 101 taken along line X1-X1 is shown (see FIG. Figure 3A ). The following description with reference to the first main actuator 101 and the first cross actuator 102 is equally applicable to the second main actuator 103 and the second cross actuator 104. The first main actuator 101 is hollow and defines a first external opening 114. The first external opening 114 is configured to receive the first cross actuator 102. Figure 2 and Figure 3A-3D As shown, the first main actuator 101 and the first cross actuator 102 are coaxially arranged relative to each other around the first axis A1. Similarly, the second main actuator 103 and the second cross actuator 104 are coaxially arranged relative to each other around the second axis A2. Therefore, a very space-saving arrangement between the main actuators 101, 103 and the cross actuators 102, 104 is achieved. In addition, the coaxial arrangement of the cross actuators 102, 104 at least partially within the main actuators 101, 103 can further facilitate the operable connection between the main actuators 101, 103. Figure 2 and Figure 3A-3D In the illustrated example embodiment, the first master actuator 101 is arranged radially outward relative to the first cross actuator 102, and the second master actuator 103 is arranged radially outward relative to the second cross actuator 104. In other words, the first master actuator 101 surrounds the first cross actuator 102, and the second master actuator 103 surrounds the second cross actuator 104. Specifically, the first master cylinder 110 is in the shape of a hollow cylinder extending from an inner diameter to an outer diameter, thereby defining an outer opening 114 at its center. This is Figure 3B and Figure 3D These figures also show that the first master cylinder 110 has a circular cross section and the first cross cylinder 120 has a circular cross section. By determining the dimensions of the master cylinders 110, 130 and the cross cylinders 120, 140 so that the circular cross section of the cross cylinders 120, 140 is geometrically complementary to the dimensions of the first outer openings 114 of the master cylinders 110, 120, the cross cylinders 120, 140 can be received in the first outer openings 114 of the master cylinders 110, 130 in an engaging manner. Similarly, although in Figure 3B and Figure 3D As not shown in the drawings, the second master cylinder 130 has an annular cross section and the second cross cylinder 140 has a circular cross section. The cross sections are defined to be transverse to the first axis A1 and the second axis A2, respectively.

[0112] The cross-sectional area of ​​the first master hydraulic chamber 112 is 1.5 to 9 times larger than the cross-sectional area of ​​the first synchronous hydraulic chamber 121, and the cross-sectional area of ​​the second master hydraulic chamber 132 is 1.5 to 9 times larger than the cross-sectional area of ​​the second synchronous hydraulic chamber 141. The cross-sectional areas are defined as being transverse to the first axis A1 and the second axis A2, respectively. In addition, a circular groove 115 is formed in the first master cylinder 110 (see Figure 3A ). The circular groove 115 can facilitate a locking engagement between the first cross cylinder 120 received in the first outer opening 114 and the first master cylinder 110. This locking engagement can be achieved by providing the first cross cylinder 120 with one or more protrusions 126 (see Figure 3C ), the one or more protrusions 126 match the protrusions of the circular groove 115, so that the one or more protrusions 126 of the first cross cylinder 120 can engage the circular groove 115 of the first master cylinder 110. The locking engagement between the one or more protrusions 126 and the circular groove 115 can prevent the first cross cylinder 120 and the first master cylinder 110 from moving relative to each other. Figure 3A As shown, a cross section of the first master piston 111 is substantially L-shaped in a plane parallel to the first axis A1.

[0113] Now refer to Figure 3C and Figure 3D ,in Figure 3C A schematic cross-sectional view of a first cross actuator 102 is depicted, Figure 3D The first cross actuator 102 is shown along the line X2-X2 (see Figure 3C ) is a cross-sectional view taken from the top of the drawing. The following description of the first cross actuator 102 is also applicable to the second cross actuator 104. The first cross actuator 102 includes a first cross cylinder 120, which has a first synchronous hydraulic chamber 121. The first cross actuator 102 also includes a first synchronous piston 122. The first synchronous piston 122 also includes a first synchronous piston element 123. The first synchronous piston element 123 is formed as a protrusion on the first synchronous piston 122. Alternatively, the first synchronous piston element 123 can be provided as a seal or a similar component. The first synchronous piston element 123 is configured to move along the first axis A1 together with the first synchronous piston 122. The first synchronous piston element 123 divides the first synchronous hydraulic chamber 121 into a first compression chamber 124 and a first rebound chamber 125. When the first synchronous piston element 123 moves along the first axis A1 together with the first synchronous piston 122, the volumes of the first compression chamber 124 and the first rebound chamber 125 change accordingly. As shown in FIG. Figure 3DAs shown, the first synchronization piston 122 is generally circular when viewed from the bearing seat. The cross-section of the first synchronization hydraulic chamber 121 is generally circular in a plane perpendicular to the first axis A1. The first synchronization hydraulic chamber 121 is provided with a protrusion 126. The protrusion 126 is formed as a circular flange extending around the circumference of the first cross cylinder 120. The protrusion 126 is configured to serve as a male connector that can be engaged with a corresponding female connector on the first master cylinder 110.

[0114] Figure 4 and FIG. 5A to FIG. 5D A hydraulic system 200 according to another exemplary embodiment of the first aspect is shown. The hydraulic system 200 is also applicable to a roll crusher according to the second aspect. There are many similarities between the hydraulic system 200 and the previously described hydraulic system 100, so the hydraulic system 200 will only be briefly described with regard to the differences. The same reference numerals in the drawings represent the same features.

[0115] The hydraulic system 200 comprises a first main actuator 201 and a first cross actuator 202, as well as a second main actuator 203 and a second cross actuator 204. As will be readily appreciated by a person skilled in the art, the functions of these master cylinders 201, 203 and cross cylinders 202, 204 are generally the same as in the first exemplary embodiment already described, but there are structural differences. For the hydraulic system 200, the main actuators 201, 203 are arranged in an inverted manner relative to the cross actuators 202, 204. In other words, the first cross actuator 202 is arranged radially outwardly relative to the first main actuator 201, and the second cross actuator 204 is arranged radially outwardly relative to the second main actuator 203. The first master cylinder 210 of the first main actuator 201 has an annular flange 213, which is configured to be connected to the support structure 11 of the roll crusher. Likewise, the second master cylinder 230 of the second master actuator 203 has an annular flange 233 configured to be attached to the support structure 12 of the roll crusher. The first master cylinder 210 and the second master cylinder 230 are generally cylindrical and are adapted to be inserted into the first cross cylinder 220 and the second cross cylinder 240, which radially outwardly surround the first cross cylinder 220 and the second cross cylinder 240. The first master piston 211 and the second master piston 231 of the master actuator 201, 203 are configured to be attached to the movable bearing seats 31, 32 of the roll crusher 2. Figure 4 and Figures 5A to 5D As shown, the master pistons 211 and 231 have circular cross sections. The first master hydraulic chamber 212 and the second master hydraulic chamber 232 of the master hydraulic cylinders 210 and 230 have circular cross sections. Figure 5B As shown, Figure 5B The first main hydraulic chamber 212 is shown along Figure 5A The cross section is taken along the X3-X3 line.

[0116] The first cross cylinder 220 and the second cross cylinder 240 extend radially outward from the master cylinders 210, 230. The first cross actuator 202 includes a first synchronization piston 222 that protrudes into the first cross cylinder 220. Similarly, the second cross actuator 204 includes a second synchronization piston 242 that protrudes into the second cross cylinder 240. Figure 5D This is best shown in FIG. 1 , which shows a cross section taken along line X4-X4 (see FIG. Figure 5C ), the first cross cylinder 220 has an annular cross section. Therefore, the first cross cylinder 220 is in the shape of a hollow cylinder extending from an inner diameter to an outer diameter, thereby defining an outer opening 214 at its center. The first synchronous piston 222 includes a first synchronous piston element 223, which extends radially outward from the surface of the first synchronous piston 22 in the form of a flange and is in contact with the opposite inner surface of the first synchronous hydraulic chamber 221, so that the first synchronous hydraulic chamber 221 is divided into a first compression chamber 224 and a second rebound chamber 225. Similarly, the second synchronous piston 242 includes a second synchronous piston element 243, which extends radially outward from the surface of the second synchronous piston 242 in the form of a flange and is in contact with the opposite inner surface of the second synchronous hydraulic chamber 241, so that the second synchronous hydraulic chamber 241 is divided into a second compression chamber 244 and a second rebound chamber 245. The first cross cylinder 220 further includes a first cross cylinder element 226 that protrudes radially inward from the inner surface of the first cross cylinder 220 to engage with the first synchronization piston 222 in a sealing manner. Figure 4 As shown, the first cross cylinder element 226 helps define an extension of the first synchronization hydraulic chamber 221 (more specifically, an extension of the first rebound chamber 225). Similarly, the second cross cylinder 240 also includes a second cross cylinder element 246, which protrudes radially inward from the inner surface of the second cross cylinder 240 so that it is connected to the second synchronization piston 242 in a sealing manner. Figure 4 As shown, the second cross-cylinder member 246 helps to define an extension of the second synchronization hydraulic chamber 241 (more specifically, an extension of the second rebound chamber 245 ).

[0117] In the same manner as the first embodiment already described, the first compression chamber 224 is fluidly connected to the second rebound chamber 245 via the first synchronization hydraulic line 17. The first rebound chamber 225 is fluidly connected to the second compression chamber 244 via the second synchronization hydraulic line 18. The fluid connection between the compression chambers 224 and 244 and the rebound chambers 225 and 245 synchronizes the movement of the first synchronization piston 222 and the second synchronization piston 242 by the same principle as described above.

[0118] Figure 6 and FIG. 7A to FIG. 7D A hydraulic system 300 according to another exemplary embodiment of the first aspect is shown. The hydraulic system 300 is also applicable to the roller crusher 2 according to the second aspect. There are many similarities between the hydraulic system 300 and the hydraulic systems 100 and 200 described previously, so the hydraulic system 300 will only be briefly described with regard to the differences. The same reference numerals in the drawings represent the same features.

[0119] The hydraulic system 300 includes a first main actuator 301 and a first cross actuator 302, and a second main actuator 303 and a second cross actuator 304. As those skilled in the art will readily appreciate, the functions of these main actuators 301, 303 and cross actuators 302, 304 are generally the same as the first and second example embodiments already described, but there are structural differences. For the hydraulic system 300, the main actuators 301, 303 are not arranged radially outward relative to each other as in the aforementioned example embodiments. Instead, the first main cross actuator 301 is axially arranged with the first cross actuator 302 along a first axis A1, and the second main actuator 303 is axially arranged with the second cross actuator 304 along a second axis A2. Figure 6 As shown, the main actuators 301, 303 and the cross actuators 302, 304 are arranged on opposite sides of the support structure 11', 12' of the roller crusher 2. In other words, the frame 21 may include a support structure 11', 12' for the hydraulic system 300, the support structure 11', 12' having a first side 60, 61 facing the movable roller 22 and an opposite second side 62, 63 facing away from the movable roller 22.

[0120] The first master cylinder 310 of the first master actuator 301 is arranged on the first side 60 of the support structure 11', and the first cross cylinder 320 of the first cross actuator 302 is arranged on the second side 32 of the support structure 11'. The first master piston 311 of the first actuator 301 and the first synchronization piston 322 of the first cross actuator 302 are connected to each other via the first opening 40 of the support structure 11'. The master piston 311 is configured to be coupled to the movable bearing seat 31 and has a circular cross section. The first master cylinder 310 has a first master hydraulic chamber 312, and the first master hydraulic chamber 312 has a circular cross section, as shown in FIG. Figure 7B As shown, Figure 7B A cross section taken along line X5-X5 is shown (see Fig. 7A ). The first cross cylinder 320 has a first synchronous hydraulic chamber 321 formed therein. The first synchronous hydraulic chamber 321 is defined by the inner wall of the first cross cylinder 320 and the outer surface of the first synchronous piston 322. Figure 6As shown, the first synchronization piston 322 extends through the first cross cylinder 320 so that it protrudes from the opposite side of the first cross cylinder 320. The first synchronization piston 322 includes a first synchronization piston element 323, which divides the first synchronization hydraulic chamber 321 into a first compression chamber 324 and a first rebound chamber 325. The first master piston 311 and the first synchronization piston 322 are coupled together along the first axis A1. This can be achieved in different ways, such as by bolting, threading, etc. It is also conceivable that the first master piston 311 and the first synchronization piston 322 are attached to each other to form an integral one-piece element. This can be achieved by welding or by manufacturing the first master piston 311 and the first synchronization piston 322 as a one-piece element. The opening 40 can be a through hole or a through opening, and for such an exemplary embodiment, the first master piston 311 and the first synchronization piston 322 may need to be separate elements, which are then attached to each other during assembly. However, in another not shown embodiment of the opening 40, the opening is a recess formed in the support structure 11' from a direction transverse to the first axis A1, and for an embodiment in which the first master piston 311 and the first synchronous piston 322 are pre-connected together, the recess also allows the first master piston 311 and the first synchronous piston 322 to be inserted into the correct position.

[0121] Likewise, the second master cylinder 330 of the second master actuator 303 is arranged on the first side 61 of the support structure 12', and the second cross cylinder 340 of the second cross actuator 304 is arranged on the second side 33 of the support structure 12'. The second master piston 331 of the second actuator 303 and the second synchronous piston 342 of the second cross actuator 304 are connected to each other via the second opening 42 of the support structure 12'. The second master piston 331 is configured to be coupled to the movable bearing seat 32 and has a circular cross-section. The second master cylinder 330 has a second master hydraulic chamber 332 having an annular cross-section. The second cross cylinder 340 has a second synchronous hydraulic chamber 341 formed therein. The second synchronous hydraulic chamber 341 is defined by the inner wall of the second cross cylinder 340 and the outer surface of the second synchronous piston 342, as shown in FIG. Figure 6As shown, the second synchronization piston 342 extends through the second cross cylinder 340 so that it protrudes from opposite sides of the second cross cylinder 340. The second synchronization hydraulic chamber 341 includes a second synchronization piston element 343, which divides the second synchronization hydraulic chamber 341 into a second compression chamber 344 and a second rebound chamber 345. The second master piston 331 and the second synchronization piston 342 are coupled together along the second axis A2. This can be achieved in different ways, such as by bolting, threading, etc. It is also conceivable that the second master piston 331 and the second synchronization piston 342 are attached to each other to form an integral one-piece element. This can be achieved by welding or by manufacturing the second master piston 331 and the second synchronization piston 342 as a one-piece element. The opening 42 can be a through hole or a through opening, and for such an exemplary embodiment, the second master piston 331 and the second synchronization piston 342 may need to be separate elements, which are then attached to each other during assembly. However, in another not shown embodiment of the opening 42 , the opening is a recess, which also allows the second master piston 331 and the second synchronous piston 342 to be inserted into the correct position for an embodiment in which the second master piston 331 and the second synchronous piston 342 are pre-connected together.

[0122] In the same manner as the first and second exemplary embodiments already described, the first compression chamber 324 is fluidly connected to the second rebound chamber 345 via the first synchronization hydraulic line 17. The first rebound chamber 325 is fluidly connected to the second compression chamber 344 via the second synchronization hydraulic line 18. The fluid connection between the compression chambers 324 and 344 and the rebound chambers 325 and 345 synchronizes the movement of the first synchronization piston 322 and the second synchronization piston 342 by the same principle as described above.

[0123] As mentioned above, the hydraulic system according to the present invention is not limited to providing only one master cylinder operating on each movable bearing seat. Figure 8 An alternative exemplary embodiment of a roller crusher 2' according to the second aspect is shown, wherein the roller crusher 2' has been equipped with a hydraulic system 400, which is based on providing two first main actuators 401a, 401b for the movable bearing seat 31 and two second main actuators 403a, 403b for the movable bearing seat 32. The two first main actuators 401a, 401b are arranged on a first side 400a of the hydraulic system 400, and the two second main actuators 403a, 403b are arranged on a second side 400b of the hydraulic system 400. Figure 8It can be seen that the two first main actuators 401a, 401b are arranged in parallel with each other and offset from each other in the vertical direction on the first movable bearing seat 31, and the two second main actuators 403a, 403b are arranged in parallel with each other and offset from each other in the vertical direction on the second movable bearing seat 32. The first cross actuator 402 can be connected to the first movable bearing seat 31, parallel to the two first main actuators 401a, 401b and located between the two first main actuators 401a, 401b; the second cross actuator 404 can be connected to the second movable bearing seat 32, parallel to the two second main actuators 403a, 403b and located between the two second main actuators 403a, 403b.

[0124] The hydraulic system 400 may be advantageous because it allows the main actuators 401a, 401b, 403a, 403b and the cross actuators 402, 404 to be physically separated from each other while still maintaining an even load distribution on the movable bearing seats 31, 32. For greater clarity, only the first side 400a of the hydraulic system 400 is discussed, and by arranging the first main actuators 401a, 401b parallel to each other and vertically offset from each other on the first movable bearing seat 31, and by controlling each of the two first main actuators 401a, 401b so that they apply the same or substantially the same amount of force to the movable bearing seat 31, the resultant force on the movable bearing seat 31 will be located between the two first main actuators 401a, 401b. By arranging the first crossover actuator 402 at the same location, the first main actuators 401a, 401b and the crossover actuator 402 can be operably coupled to each other with uniform force distribution (even though they are not physically arranged linearly along the first axis A1. The same argument applies to the second side 400b of the hydraulic system 400).

[0125] like Figure 8 As shown, the first master cylinders 410a, 410b of the two first master actuators 401a, 401b are arranged on the first side 60 of the support structure 11', and the first cross cylinder 320 of the first cross actuator 402 is arranged on the second side 62 of the support structure 11'. On the other side 400b, the second master cylinders 430a, 430b of the two second master actuators 403a, 403b are arranged on the first side 61 of the support structure 12', and the second cross cylinder 340 of the second cross actuator 404 is arranged on the second side 63 of the support structure 12'. The support structures 11' and 12' are similar to those of reference 1 Figure 6 The same as described, so in Figure 8 In addition, the first cross cylinder 320 and the second cross cylinder 340 are the same as those in the reference numerals. Figure 6 are the same as those described, so in Figure 8 The same reference numerals are used in the drawings. Figure 8As can be seen in FIG. 4 and in more detail in FIG. 4 , the hydraulic system 400 is shown. Fig. 9 As is more clearly shown in the figure, the first synchronous piston 422 can be connected to the first movable bearing seat 31 via the first opening 40 of the support structure 11'. On the second side 400b, the second synchronous piston 442 can be connected to the second movable bearing seat 32 via the second opening 42 of the support structure 12'. The first synchronous piston 422 can be connected to the first movable bearing seat 11' via the first bracket 440, and the second synchronous piston 442 can be connected to the second movable bearing seat 32 via the second bracket 460.

[0126] The first synchronization piston 422 is similar to the first synchronization piston 322 described above, but differs in that it extends all the way to and is connected to the first bracket 440. Similarly, the second synchronization piston 442 is similar to the first synchronization piston 342 described above, but differs in that it extends all the way to and is connected to the second bracket 460.

[0127] In this example embodiment, the first master actuators 401a and 401b are identical to each other. Providing identical master actuators may be beneficial because this facilitates providing a uniform force distribution. However, it is also conceivable to provide different master actuators. Each first master actuator 401a, 401b includes a respective first master cylinder 410a, 410b and a respective first master piston 411a, 411b, which extends into the respective first master cylinder 410a, 410b to define the respective first master hydraulic chamber 412a, 412b. Similarly, in this example embodiment, the second master actuators 403a and 403b are identical to each other. Each second master actuator 403a, 403b includes a respective second master cylinder 430a, 430b and a respective first master piston 431a, 431b extending into the respective second master cylinder 430a, 430b to define a respective second master hydraulic chamber 432a, 432b. Figure 8 As clearly shown, the fluid and fluid pressure within the first master hydraulic chambers 412a, 412b and the second master hydraulic chambers 432a, 432b can be controlled via the first hydraulic line 19' and the second hydraulic line 20', respectively. The first hydraulic line 19' fluidly connects the first master hydraulic chambers 412a, 412b to the controller 15, and the second hydraulic line 20' fluidly connects the second master hydraulic chambers 432a, 432b to the controller 15. The controller 15 can control the fluid and fluid pressure within the first master hydraulic chambers 412a, 412b and the second master hydraulic chambers 432a, 432b in the same manner as the previous embodiment.

[0128] As previously described, the first cross cylinder 320 and the second cross cylinder 340 are identical to the already described hydraulic system 300. Therefore, in the same manner as in this exemplary embodiment, the first compression chamber 324 is fluidly connected to the second rebound chamber 345 via the first synchronization hydraulic line 17. The first rebound chamber 325 is fluidly connected to the second compression chamber 344 via the second synchronization hydraulic line 18. The fluid connection between the compression chambers 324 and 344 and the rebound chambers 325 and 345 synchronizes the movement of the first synchronization piston 422 and the second synchronization piston 442 using the same principle as previously described.

[0129] Although some embodiments have been described and shown in detail, the present invention is not limited to these embodiments, but can also be implemented in other ways within the scope of the subject matter defined in the appended claims. Specifically, it should be understood that other embodiments can be used, and structural and functional modifications can be made without departing from the scope of the present invention.

[0130] For example, there are many ways to operably couple a cross actuator to at least one main actuator. As yet another example, the cross actuator can be configured to be disposed between and interconnect the fixed bearing seat and the movable bearing seat. As will be readily appreciated by those skilled in the art, the same principles will apply to other embodiments, as any movement of the movable bearing seat will cause the gap between the fixed bearing seat and the movable bearing seat to change. If a cross cylinder is disposed between and interconnect the fixed bearing seat and the movable bearing seat, the synchronization piston will move relative to the cross cylinder, thereby moving the fluid to the opposite cross cylinder.

[0131] In a device claim enumerating several means, several of these means may be embodied by one and the same item of hardware. The mere fact that certain measures are recited in mutually different dependent claims or described in different embodiments does not indicate that a combination of these measures cannot be used to advantage.

[0132] It should be emphasized that the term "include / comprises" when used in this specification is used to specify the existence of the features, integers, steps or components, but does not exclude the existence or addition of one or more other features, integers, steps, components or combinations thereof.

[0133] List of implementation methods

[0134] Embodiment 1. A hydraulic system for a roller crusher, a frame; a fixed roller supported by one or more fixed bearing seats fixed relative to the frame; a movable roller supported by a first movable bearing seat and a second movable bearing seat movable relative to the frame; and wherein the fixed roller and the movable roller define a crushing gap for receiving a material to be crushed, the hydraulic system comprising:

[0135] at least one first master actuator connectable to the first movable bearing seat, the at least one first master actuator each comprising: a first master cylinder having a first master hydraulic chamber formed therein; and a first master piston extending into the first master cylinder, wherein the at least one first master actuator is configured to apply a force along a first axis to generate a force acting on the first movable bearing seat,

[0136] at least one second master actuator connectable to the second movable bearing seat, the at least one second master actuator each comprising: a second master cylinder having a second master hydraulic chamber formed therein; and a second master piston extending into the second master cylinder, wherein the at least one second master actuator is configured to apply a force along a second axis parallel to the first axis, thereby generating a force acting on the second movable bearing seat,

[0137] A first crossover actuator, comprising: a first crossover cylinder having a first synchronous hydraulic chamber formed therein; and a first synchronous piston extending into the first synchronous hydraulic chamber, wherein the first synchronous piston comprises a first synchronous piston element that divides the first synchronous hydraulic chamber into a first compression chamber and a first rebound chamber,

[0138] A second crossover actuator includes: a second crossover cylinder having a second synchronous hydraulic chamber formed therein; and a second synchronous piston extending into the second synchronous hydraulic chamber, wherein the second synchronous piston includes a second synchronous piston element that divides the second synchronous hydraulic chamber into a second compression chamber and a second rebound chamber,

[0139] wherein the first crossover actuator is operably coupled to the at least one first main actuator and the second crossover actuator is operably coupled to the at least one second main actuator, and

[0140] The first compression chamber is fluidly connected to the second rebound chamber, and the first rebound chamber is fluidly connected to the second compression chamber.

[0141] Embodiment 2. A hydraulic system according to embodiment 1, wherein the first master piston of the at least one first master actuator is configured to transfer force to the first synchronization piston along the first axis, and / or the second master piston of the at least one second master actuator is configured to transfer force to the second synchronization piston along the second axis.

[0142] Embodiment 3. A hydraulic system according to embodiment 1 or 2, wherein the at least one first main actuator is a first main actuator, and wherein the first main actuator and the first cross actuator are arranged coaxially with each other around a first axis, and / or wherein the at least one second main actuator is a second main actuator, and wherein the second main actuator and the second cross actuator are arranged coaxially with each other around the second axis.

[0143] Embodiment 4. The hydraulic system of embodiment 3, wherein the first main actuator is arranged radially outward relative to the first crossover actuator, and / or the second main actuator is arranged radially outward relative to the second crossover actuator.

[0144] Embodiment 5. A hydraulic system according to embodiment 4, wherein the first master cylinder has an annular cross section and the first cross cylinder has a circular cross section; and / or the second master cylinder has an annular cross section and the second cross cylinder has a circular cross section.

[0145] Embodiment 6. The hydraulic system of embodiment 3, wherein the first crossover actuator is arranged radially outward relative to the first main actuator, and / or the second crossover actuator is arranged radially outward relative to the second main actuator.

[0146] Embodiment 7. The hydraulic system of embodiment 6, wherein the first master cylinder has a circular cross-section and the first cross-cylinder has an annular cross-section, wherein the second master cylinder has a circular cross-section and the second cross-cylinder has an annular cross-section.

[0147] Embodiment 8. A hydraulic system according to embodiment 1 or 2, wherein the at least one first main actuator is a first main actuator, the first main actuator and the first cross actuator are axially arranged one after another along the first axis, and wherein the at least one second main actuator is a second main actuator, the second main actuator and the second cross actuator are axially arranged one after another along the second axis.

[0148] Embodiment 9. The hydraulic system of embodiment 8, wherein the frame comprises a support structure for the hydraulic system, the support structure having a first side facing the movable roller and an opposite second side facing away from the movable roller,

[0149] wherein the first master cylinder is configured to be arranged on a first side of the support structure and the first cross cylinder is configured to be arranged on a second side of the support structure, and wherein the first master piston and the first synchronization piston are configured to be connected to each other via a first opening of the support structure, and

[0150] wherein the second master cylinder is configured to be arranged on a first side of the support structure, and the second cross cylinder is configured to be arranged on a second side of the support structure, and wherein the second master piston and the second synchronization piston are configured to be connected to each other via a second opening of the support structure.

[0151] Embodiment 10. The hydraulic system according to embodiment 1 or 2,

[0152] The at least one first main actuator comprises two first main actuators, and the two first main actuators are configured to be arranged on the first movable bearing seat in parallel with each other and offset from each other in the vertical direction.

[0153] The at least one second main actuator comprises two second main actuators, and the two second main actuators are configured to be arranged on the second movable bearing seat in parallel with each other and offset from each other in the vertical direction.

[0154] wherein the first cross actuator is connectable to the first movable bearing seat and is configured to be arranged in parallel with and between the two first main actuators, and

[0155] Wherein, the second cross actuator can be connected to the second movable bearing seat and is configured to be arranged in parallel with the two second main actuators and between the two second main actuators.

[0156] Embodiment 11. The hydraulic system of embodiment 10, wherein the frame comprises a support structure for the hydraulic system, the support structure having a first side facing the movable roller and an opposite second side facing away from the movable roller,

[0157] wherein the first master cylinders of the two first master actuators are configured to be arranged on a first side of the support structure, and the first cross cylinder is configured to be arranged on a second side of the support structure, and wherein the first synchronization piston is connectable to the first movable bearing seat via a first opening of the support structure, and

[0158] Wherein, the second master cylinders of the two second master actuators are configured to be arranged on a first side of the support structure, and the second cross cylinder is configured to be arranged on a second side of the support structure, and wherein the second synchronous piston can be connected to the second movable bearing seat via a second opening of the support structure.

[0159] Embodiment 12. The hydraulic system according to embodiment 10 or 11, wherein the first synchronous piston is connectable to the first movable bearing seat via a first bracket, and the second synchronous piston is connectable to the second movable bearing seat via a second bracket.

[0160] Embodiment 13. A hydraulic system according to any one of the preceding embodiments, wherein the total cross-sectional area of ​​the first master hydraulic chamber of the at least one first master actuator is 1.5 to 9 times larger than the cross-sectional area of ​​the first synchronous hydraulic chamber, and wherein the total cross-sectional area of ​​the second master hydraulic chamber of the at least one second master actuator is 1.5 to 9 times larger than the cross-sectional area of ​​the second synchronous hydraulic chamber.

[0161] Embodiment 14. A hydraulic system according to any of the preceding embodiments, wherein the fluid connection between the first compression chamber and the second rebound chamber forms a first closed fluid circuit, and the fluid connection between the first rebound chamber and the second compression chamber forms a second closed fluid circuit.

[0162] Embodiment 15. The hydraulic system according to any of the preceding embodiments further includes one or more hydraulic accumulators, which are fluidically connected to the respective first master hydraulic chambers of the at least one first master actuator and / or the respective second master hydraulic chambers of the at least one second master actuator.

[0163] Embodiment 16. The hydraulic system of any of the preceding embodiments, wherein the first synchronization piston is integrally connected to the first synchronization piston element, and the second synchronization piston is integrally connected to the second synchronization piston element.

[0164] Embodiment 17. A hydraulic system according to any one of Embodiments 3 to 7, wherein the first cross-cylinder is engaged with the first master cylinder to prevent the first cross-cylinder from moving relative to the first master cylinder in a first plane perpendicular to the first axis, and / or the second cross-cylinder is engaged with the second master cylinder to prevent the second cross-cylinder from moving relative to the second master cylinder in a second plane perpendicular to the second axis.

[0165] Embodiment 18. The hydraulic system according to any one of embodiments 3 to 9, wherein the first master piston is connected to the first synchronization piston, and / or the second master piston is connected to the second synchronization piston.

[0166] Embodiment 19. The hydraulic system according to embodiment 18, wherein the first master piston is integrally connected to the first synchronization piston, and / or the second master piston is integrally connected to the second synchronization piston.

[0167] Embodiment 20. A hydraulic system according to any one of embodiments 3 to 9, wherein the first master cylinder and the first cross cylinder are integrally formed as a first one-piece element, and / or the second master cylinder and the second cross cylinder are integrally formed as a second one-piece element.

[0168] Embodiment 21. A roller crusher for comminuting materials, comprising:

[0169] frame,

[0170] a fixed roller supported by a fixed bearing seat, wherein the fixed bearing seat is fixed relative to the frame,

[0171] a movable roller supported by a movable bearing seat, wherein the movable bearing seat is movable relative to the frame, wherein the fixed roller and the movable roller define a crushing gap for receiving material to be crushed, and

[0172] A hydraulic system according to any one of embodiments 1-20, wherein the hydraulic system is configured to transmit a force to the movable bearing seat to bias the movable roller toward the fixed roller.

Claims

1. A hydraulic system for a roller crusher, characterized in that: The hydraulic system comprises: a frame; a fixed roller supported by one or more fixed bearing seats fixed relative to the frame; a movable roller supported by a first movable bearing seat and a second movable bearing seat movable relative to the frame; and wherein the fixed roller and the movable roller define a crushing gap for receiving a material to be crushed, the hydraulic system comprises: at least one first master actuator connectable to the first movable bearing seat, the at least one first master actuator each comprising: a first master cylinder having a first master hydraulic chamber formed therein; and a first master piston extending into the first master cylinder, wherein the at least one first master actuator is configured to apply a force along a first axis to generate a force acting on the first movable bearing seat, at least one second master actuator connectable to the second movable bearing seat, the at least one second master actuator each comprising: a second master cylinder having a second master hydraulic chamber formed therein; and a second master piston extending into the second master cylinder, wherein the at least one second master actuator is configured to apply a force along a second axis parallel to the first axis, thereby generating a force acting on the second movable bearing seat, A first crossover actuator, comprising: a first crossover cylinder having a first synchronous hydraulic chamber formed therein; and a first synchronous piston extending into the first synchronous hydraulic chamber, wherein the first synchronous piston comprises a first synchronous piston element that divides the first synchronous hydraulic chamber into a first compression chamber and a first rebound chamber, A second crossover actuator includes: a second crossover cylinder having a second synchronous hydraulic chamber formed therein; and a second synchronous piston extending into the second synchronous hydraulic chamber, wherein the second synchronous piston includes a second synchronous piston element that divides the second synchronous hydraulic chamber into a second compression chamber and a second rebound chamber, wherein the first crossover actuator is operably coupled to the at least one first main actuator and the second crossover actuator is operably coupled to the at least one second main actuator, and The first compression chamber is fluidly connected to the second rebound chamber, and the first rebound chamber is fluidly connected to the second compression chamber.

2. The hydraulic system according to claim 1, characterized in that: The first master piston of the at least one first master actuator is configured to transmit force to the first synchronization piston along the first axis and / or wherein the second master piston of the at least one second master actuator is configured to transmit force to the second synchronization piston along the second axis.

3. The hydraulic system according to claim 1, characterized in that: The at least one first main actuator is a first main actuator, and wherein the first main actuator and the first cross actuator are arranged coaxially with each other around a first axis, and / or the at least one second main actuator is a second main actuator, and wherein the second main actuator and the second cross actuator are arranged coaxially with each other around the second axis.

4. The hydraulic system according to claim 3, characterized in that: The first main actuator is arranged radially outwardly relative to the first cross-actuator, and / or wherein the second main actuator is arranged radially outwardly relative to the second cross-actuator.

5. The hydraulic system according to claim 4, characterized in that: The first master cylinder has an annular cross section and the first cross cylinder has a circular cross section, and / or the second master cylinder has an annular cross section and the second cross cylinder has a circular cross section.

6. The hydraulic system according to claim 3, characterized in that: The first cross-actuator is arranged radially outwardly relative to the first main actuator and / or the second cross-actuator is arranged radially outwardly relative to the second main actuator.

7. The hydraulic system according to claim 6, characterized in that: The first master cylinder has a circular cross-section and the first cross-cylinder has an annular cross-section, wherein the second master cylinder has a circular cross-section and the second cross-cylinder has an annular cross-section.

8. The hydraulic system according to claim 1, characterized in that: The at least one first main actuator is a first main actuator, and the first main actuator and the first cross actuator are axially arranged one after another along the first axis, and wherein the at least one second main actuator is a second main actuator, and the second main actuator and the second cross actuator are axially arranged one after another along the second axis.

9. The hydraulic system according to claim 8, characterized in that: The frame comprises a support structure for the hydraulic system, the support structure having a first side facing the movable roller and an opposite second side facing away from the movable roller, wherein the first master cylinder is configured to be arranged on a first side of the support structure, and the first cross cylinder is configured to be arranged on a second side of the support structure, and wherein the first master piston and the first synchronization piston are configured to be connected to each other via a first opening of the support structure, and wherein the second master cylinder is configured to be arranged on a first side of the support structure and the second cross cylinder is configured to be arranged on a second side of the support structure, and wherein the second master piston and the second synchronization piston are configured to be connected to each other via a second opening of the support structure.

10. The hydraulic system according to claim 1, characterized in that: The at least one first main actuator includes two first main actuators, and the two first main actuators are configured to be arranged on the first movable bearing seat in parallel with each other and offset from each other in the vertical direction. The at least one second main actuator comprises two second main actuators, and the two second main actuators are configured to be arranged on the second movable bearing seat in parallel with each other and offset from each other in the vertical direction. wherein the first cross actuator is connectable to the first movable bearing seat, and the first cross actuator is configured to be arranged in parallel with the two first main actuators and between the two first main actuators, and Wherein, the second cross actuator is connectable to the second movable bearing seat, and the second cross actuator is configured to be arranged in parallel with the two second main actuators and located between the two second main actuators.

11. The hydraulic system according to claim 10, characterized in that: The frame comprises a support structure for the hydraulic system, the support structure having a first side facing the movable roller and an opposite second side facing away from the movable roller, wherein the first master cylinders of the two first master actuators are configured to be arranged on a first side of the support structure, and the first cross cylinder is configured to be arranged on a second side of the support structure, and wherein the first synchronization piston is connectable to the first movable bearing seat via a first opening of the support structure, and The second master cylinders of the two second master actuators are configured to be arranged on a first side of the support structure, while the second cross cylinder is configured to be arranged on a second side of the support structure, and wherein the second synchronization piston can be connected to the second movable bearing seat via a second opening of the support structure.

12. The hydraulic system according to claim 10, characterized in that: The first synchronizing piston can be connected to the first movable bearing seat via a first bracket, and the second synchronizing piston can be connected to the second movable bearing seat via a second bracket.

13. The hydraulic system according to claim 1, characterized in that: The total cross-sectional area of ​​the first master hydraulic chamber of the at least one first master actuator is 1.5 to 9 times larger than the cross-sectional area of ​​the first synchronous hydraulic chamber, and the total cross-sectional area of ​​the second master hydraulic chamber of the at least one second master actuator is 1.5 to 9 times larger than the cross-sectional area of ​​the second synchronous hydraulic chamber.

14. The hydraulic system according to claim 1, characterized in that: The fluid connection between the first compression chamber and the second rebound chamber forms a first closed fluid circuit, and the fluid connection between the first rebound chamber and the second compression chamber forms a second closed fluid circuit.

15. The hydraulic system according to claim 1, characterized in that: Also included are one or more hydraulic accumulators, which are fluidly connected to the respective first master hydraulic chambers of the at least one first master actuator and / or the respective second master hydraulic chambers of the at least one second master actuator.

16. The hydraulic system according to claim 1, characterized in that The first synchronizing piston is integrally connected to the first synchronizing piston element, and the second synchronizing piston is integrally connected to the second synchronizing piston element.

17. The hydraulic system according to claim 3, characterized in that: The first cross-cylinder is engaged with the first master cylinder to prevent the first cross-cylinder from moving relative to the first master cylinder in a first plane perpendicular to the first axis, and / or the second cross-cylinder is engaged with the second master cylinder to prevent the second cross-cylinder from moving relative to the second master cylinder in a second plane perpendicular to the second axis.

18. The hydraulic system according to claim 3, characterized in that: The first master piston is connected to the first synchronization piston, and / or the second master piston is connected to the second synchronization piston.

19. The hydraulic system according to claim 18, characterized in that The first master piston is integrally connected to the first synchronization piston, and / or the second master piston is integrally connected to the second synchronization piston.

20. The hydraulic system according to claim 3, characterized in that The first master cylinder and the first cross-cylinder are integrated into a first one-piece element and / or the second master cylinder and the second cross-cylinder are integrated into a second one-piece element.

21. A roller crusher for material crushing, characterized in that: The roll crusher includes: frame, a fixed roller supported by a fixed bearing seat, wherein the fixed bearing seat is fixed relative to the frame, a movable roller supported by a movable bearing seat, wherein the movable bearing seat is movable relative to the frame, wherein the fixed roller and the movable roller define a crushing gap for receiving the material to be crushed, and A hydraulic system according to any one of claims 1-20, wherein the hydraulic system is configured to transmit a force to the movable bearing seat to bias the movable roller towards the fixed roller.

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