Hydraulic system for a roller crusher

A hydraulic system for a roller crusher comprising a machine frame, a fixed roll supported by one or more fixed bearing housings fixed relative to the machine frame, a movable roll supported by first and second movable bearing housings movable relative to the machine frame, and wherein the fixed roll and the movable roll defines a crushing gap for receiving material to be comminuted, the hydraulic system comprising:

• at least one first main actuator connectable to the first movable bearing housing, each of the at least one first main actuator comprising a first main cylinder having a first main hydraulic chamber formed therein, and a first main piston which extends into the first main cylinder, wherein the at least one first main actuator is configured to exert a force along a first axis resulting in a force on the first movable bearing housing,
• at least one second main actuator connectable to the second movable bearing housing, each of the at least one second main actuator comprising a second main cylinder having a second main hydraulic chamber formed therein, and a second main piston which extends into the second main cylinder, wherein the at least one second main actuator is configured to exert a force along a second axis parallel to the first axis resulting in a force on the second movable bearing housing,
• a first crossing actuator comprising a first crossing cylinder having a first synchronizing hydraulic chamber formed therein, and a first synchronizing piston which extends into the first synchronizing hydraulic chamber, wherein the first synchronizing piston comprises a first synchronizing piston element separating the first synchronizing hydraulic chamber into a first compression chamber and a first rebound chamber,
• a second crossing actuator comprising a second crossing cylinder having a second synchronizing hydraulic chamber formed therein, and a second synchronizing piston which extends into the second synchronizing hydraulic chamber, wherein the second synchronizing piston comprises a second synchronizing piston element separating the second synchronizing hydraulic chamber into a second compression chamber and a second rebound chamber,
• wherein the first crossing actuator is operationally coupled to the at least one first main actuator, and the second crossing actuator is operationally coupled to the at least one second main actuator,
• 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,
• wherein the at least one first main actuator is a first main actuator and wherein said first main actuator and the first crossing actuator are coaxially arranged with respect to each other about the first axis, and/or wherein the at least one second main actuator is a second main actuator and wherein said second main actuator and the second crossing actuator are coaxially arranged with respect to each other about the second axis, and
• wherein the first main actuator is arranged radially outwardly in relation to the first crossing actuator, and/or wherein the second main actuator is arranged radially outwardly in relation to the second crossing actuator.

A hydraulic system for a roller crusher comprising a machine frame, a fixed roll supported by one or more fixed bearing housings fixed relative to the machine frame, a movable roll supported by first and second movable bearing housings movable relative to the machine frame, and wherein the fixed roll and the movable roll defines a crushing gap for receiving material to be comminuted, the hydraulic system comprising:

• at least one first main actuator connectable to the first movable bearing housing, each of the at least one first main actuator comprising a first main cylinder having a first main hydraulic chamber formed therein, and a first main piston which extends into the first main cylinder, wherein the at least one first main actuator is configured to exert a force along a first axis resulting in a force on the first movable bearing housing,
• at least one second main actuator connectable to the second movable bearing housing, each of the at least one second main actuator comprising a second main cylinder having a second main hydraulic chamber formed therein, and a second main piston which extends into the second main cylinder, wherein the at least one second main actuator is configured to exert a force along a second axis parallel to the first axis resulting in a force on the second movable bearing housing,
• a first crossing actuator comprising a first crossing cylinder having a first synchronizing hydraulic chamber formed therein, and a first synchronizing piston which extends into the first synchronizing hydraulic chamber, wherein the first synchronizing piston comprises a first synchronizing piston element separating the first synchronizing hydraulic chamber into a first compression chamber and a first rebound chamber,
• a second crossing actuator comprising a second crossing cylinder having a second synchronizing hydraulic chamber formed therein, and a second synchronizing piston which extends into the second synchronizing hydraulic chamber, wherein the second synchronizing piston comprises a second synchronizing piston element separating the second synchronizing hydraulic chamber into a second compression chamber and a second rebound chamber,
• wherein the first crossing actuator is operationally coupled to the at least one first main actuator, and the second crossing actuator is operationally coupled to the at least one second main actuator,
• 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,
• wherein the at least one first main actuator is a first main actuator and wherein said first main actuator and the first crossing actuator are coaxially arranged with respect to each other about the first axis, and/or wherein the at least one second main actuator is a second main actuator and wherein said second main actuator and the second crossing actuator are coaxially arranged with respect to each other about the second axis, and
• wherein the first crossing actuator is arranged radially outwardly in relation to the first main actuator, and/or wherein the second crossing actuator is arranged radially outwardly in relation to the second main actuator.

A hydraulic system for a roller crusher comprising a machine frame, a fixed roll supported by one or more fixed bearing housings fixed relative to the machine frame, a movable roll supported by first and second movable bearing housings movable relative to the machine frame, and wherein the fixed roll and the movable roll defines a crushing gap for receiving material to be comminuted, the hydraulic system comprising:

• at least one first main actuator connectable to the first movable bearing housing, each of the at least one first main actuator comprising a first main cylinder having a first main hydraulic chamber formed therein, and a first main piston which extends into the first main cylinder, wherein the at least one first main actuator is configured to exert a force along a first axis resulting in a force on the first movable bearing housing,
• at least one second main actuator connectable to the second movable bearing housing, each of the at least one second main actuator comprising a second main cylinder having a second main hydraulic chamber formed therein, and a second main piston which extends into the second main cylinder, wherein the at least one second main actuator is configured to exert a force along a second axis parallel to the first axis resulting in a force on the second movable bearing housing,
• a first crossing actuator comprising a first crossing cylinder having a first synchronizing hydraulic chamber formed therein, and a first synchronizing piston which extends into the first synchronizing hydraulic chamber, wherein the first synchronizing piston comprises a first synchronizing piston element separating the first synchronizing hydraulic chamber into a first compression chamber and a first rebound chamber,
• a second crossing actuator comprising a second crossing cylinder having a second synchronizing hydraulic chamber formed therein, and a second synchronizing piston which extends into the second synchronizing hydraulic chamber, wherein the second synchronizing piston comprises a second synchronizing piston element separating the second synchronizing hydraulic chamber into a second compression chamber and a second rebound chamber,
• wherein the first crossing actuator is operationally coupled to the at least one first main actuator, and the second crossing actuator is operationally coupled to the at least one second main actuator,
• 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,
• wherein the at least one first main actuator is a first main actuator, said first main actuator being arranged axially with the first crossing actuator, one after the other, along the first axis, and wherein the at least one second main actuator is a second main actuator, said second main actuator being arranged axially with the second crossing actuator, one after the other, along the second axis,
• wherein the machine frame comprises a support structure for the hydraulic system, said support structure having a first side which faces the movable roll and a second, opposite, side facing away from the movable roll,
• wherein the first main cylinder is configured to be arranged on the first side of the support structure and the first crossing cylinder is configured to be arranged on the second side of the support structure, and wherein the first main piston and the first synchronizing piston are configured to interconnect with each other via a first opening of the support structure, and
• wherein the second main cylinder is configured to be arranged on the first side of the support structure and the second crossing cylinder is configured to be arranged on the second side of the support structure, and wherein the second main piston and the second synchronizing piston are configured to interconnect with each other via a second opening of the support structure.

A hydraulic system for a roller crusher comprising a machine frame, a fixed roll supported by one or more fixed bearing housings fixed relative to the machine frame, a movable roll supported by first and second movable bearing housings movable relative to the machine frame, and wherein the fixed roll and the movable roll defines a crushing gap for receiving material to be comminuted, the hydraulic system comprising:

• at least one first main actuator connectable to the first movable bearing housing, each of the at least one first main actuator comprising a first main cylinder having a first main hydraulic chamber formed therein, and a first main piston which extends into the first main cylinder, wherein the at least one first main actuator is configured to exert a force along a first axis resulting in a force on the first movable bearing housing,
• at least one second main actuator connectable to the second movable bearing housing, each of the at least one second main actuator comprising a second main cylinder having a second main hydraulic chamber formed therein, and a second main piston which extends into the second main cylinder, wherein the at least one second main actuator is configured to exert a force along a second axis parallel to the first axis resulting in a force on the second movable bearing housing,
• a first crossing actuator comprising a first crossing cylinder having a first synchronizing hydraulic chamber formed therein, and a first synchronizing piston which extends into the first synchronizing hydraulic chamber, wherein the first synchronizing piston comprises a first synchronizing piston element separating the first synchronizing hydraulic chamber into a first compression chamber and a first rebound chamber,
• a second crossing actuator comprising a second crossing cylinder having a second synchronizing hydraulic chamber formed therein, and a second synchronizing piston which extends into the second synchronizing hydraulic chamber, wherein the second synchronizing piston comprises a second synchronizing piston element separating the second synchronizing hydraulic chamber into a second compression chamber and a second rebound chamber,
• wherein the first crossing actuator is operationally coupled to the at least one first main actuator, and the second crossing actuator is operationally coupled to the at least one second main actuator,
• 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,
• wherein the at least one first main actuator comprises two first main actuators which are configured to be arranged in parallel with and vertically offset from each other at the first movable bearing housing,
• wherein the at least one second main actuator comprises two second main actuators which are configured to be arranged in parallel with and vertically offset from each other at the second movable bearing housing,
• wherein the first crossing actuator is connectable to the first movable bearing housing and configured to be arranged in parallel with and between the two first main actuators, and
• wherein the second crossing actuator is connectable to the second movable bearing housing and configured to be arranged in parallel with and between the two second main actuators.