A hydraulic vibration generation device is provided. The device includes a manifold member having an inner volume, a fluid inlet orifice and a fluid outlet orifice. The device further includes a vibration generating member having a channel grooved drive and an off-center weight and bearing retaining plates. The inner volume receives the vibration generating member within the inner volume. The bearing retaining plate that retain bearings operate to retain the vibration generating member within the inner volume in response to coupling the bearing retaining plate to the manifold member wherein two bearings on opposing ends of the vibration generating member are retained within recesses of the bearing retaining plates. The vibration generating member rotates and generates vibration in response to hydraulic fluid flowing into the manifold member through the inlet orifice and out of the manifold member through the outlet orifice.

A hydraulic compaction generation device is provided. The device includes a manifold member having first and second inner volumes, first and second fluid inlet orifices and first and second fluid outlet orifices. The device further includes first and second compaction generating members, each having a grooved drive and an off-center weight. The first and second inner volumes receive the first and second compaction generating members within the first and second inner volumes respectively. The retaining plate retain the first and second compaction generating members within the first and second inner volumes in response to coupling the retaining plate to the manifold member. The first and second compaction generating members rotate and generate forcible up and down movements in response to hydraulic fluid flowing into the manifold member through the first and second inlet orifices and out of the manifold member through the first and second outlet orifices.

A hydraulic vibration generation device is provided. The device includes a manifold member having an inner volume, a fluid inlet orifice and a fluid outlet orifice. The device further includes a vibration generating member having a channel grooved drive and an off-center weight, and bearing retaining plates. The inner volume receives the vibration generating member within the inner volume. The bearing retaining plate that retain bearings operate to retain the vibration generating member within the inner volume in response to coupling the bearing retaining plate to the manifold member wherein two bearings on opposing ends of the vibration generating member are retained within recesses of the bearing retaining plates. The vibration generating member rotates and generates vibration in response to hydraulic fluid flowing into the manifold member through the inlet orifice and out of the manifold member through the outlet orifice.

An agitator for vibrating a drill string includes an agitator housing, a rotor and an agitation mass. The drill string has a central axis. The rotor is coupled to the agitator housing and being rotatable about an agitator axis. The agitation mass is coupled to the rotor and is rotatable about the agitator axis. During rotation, a center of mass of the agitation mass is spaced apart from the agitator axis to cause deflection of the agitator axis relative to the central axis to produce vibration in the drill string.

In one embodiment, a centrifugal force generating device comprises a first hydraulic rotor, a second hydraulic rotor, and one or more hydraulic control valves. The first hydraulic rotor comprises a first mass and is configured to rotationally drive the first mass around a first axis of rotation using a first flow of hydraulic fluid through the first hydraulic rotor. The second hydraulic rotor comprises a second mass and is configured to rotationally drive the second mass around a second axis of rotation using a second flow of hydraulic fluid through the second hydraulic rotor. The one or more hydraulic control valves are configured to control the first flow of hydraulic fluid through the first hydraulic rotor and the second flow of hydraulic fluid through the second hydraulic rotor.

A hydraulic vibration generation device is provided. The device includes a manifold member having an inner volume, a fluid inlet orifice and a fluid outlet orifice. The device further includes a vibration generating member having a channel grooved drive and an off-center weight, and bearing retaining plates. The inner volume receives the vibration generating member within the inner volume. The bearing retaining plate that retain bearings operate to retain the vibration generating member within the inner volume in response to coupling the bearing retaining plate to the manifold member wherein two bearings on opposing ends of the vibration generating member are retained within recesses of the bearing retaining plates. The vibration generating member rotates and generates vibration in response to hydraulic fluid flowing into the manifold member through the inlet orifice and out of the manifold member through the outlet orifice.

A hydraulic system may selectively operate in a charging mode or a driving mode, and may include a charging component, an accumulator, an input pump/motor, and an output motor. The charging component may charge an accumulator during operation in the charging mode. The accumulator may store pressure medium during operation in the charging mode, and may supply stored pressure medium to the input pump/motor during operation in the driving mode. The input pump/motor may supply pressure medium to at least the accumulator during operation in the charging mode, and may supply pressure medium to the output motor during at least operation in the driving mode. The output motor may provide output torque based on pressure medium supplied by the input pump/motor.

A hydraulic system may selectively operate in a charging mode or a driving mode, and may include a charging component, an accumulator, an input pump/motor, and an output motor. The charging component may charge an accumulator during operation in the charging mode. The accumulator may store pressure medium during operation in the charging mode, and may supply stored pressure medium to the input pump/motor during operation in the driving mode. The input pump/motor may supply pressure medium to at least the accumulator during operation in the charging mode, and may supply pressure medium to the output motor during at least operation in the driving mode. The output motor may provide output torque based on pressure medium supplied by the input pump/motor.

In one embodiment, a centrifugal force generating device comprises a first hydraulic rotor, a second hydraulic rotor, and one or more hydraulic control valves. The first hydraulic rotor comprises a first mass and is configured to rotationally drive the first mass around a first axis of rotation using a first flow of hydraulic fluid through the first hydraulic rotor. The second hydraulic rotor comprises a second mass and is configured to rotationally drive the second mass around a second axis of rotation using a second flow of hydraulic fluid through the second hydraulic rotor. The one or more hydraulic control valves are configured to control the first flow of hydraulic fluid through the first hydraulic rotor and the second flow of hydraulic fluid through the second hydraulic rotor.

A vehicle includes a frame, a tractive element coupled to the frame, a prime mover coupled to the frame and configured to drive the tractive element to propel the vehicle, and a silage compactor. The silage compactor includes a wheel rotatably coupled to the frame and positioned to engage silage positioned below the frame, a vibrator coupled to the wheel and configured to cause the wheel to vibrate, and a controller configured to control the vibrator to vibrate the wheel while the wheel is in contact with the silage to compress the silage.