On-site pressing of field poles for a hydroelectric generator is provided. A field pole may be placed on a press cart and press bars may be placed on top of the field pole. The press cart is moved along a track to transport the field pole to a pressing unit. Hydraulic cylinders in the pressing unit press the field pole and the press bars between the cart and a top plate of the pressing unit to straighten the field pole.

A waste compaction apparatus may include a housing and a connector arm. The housing may define a drive chamber and a compaction chamber and the connector arm may include a drive piston portion movably positioned within the drive chamber and a compaction piston portion movably positioned within the compaction chamber. The drive chamber may be selectively fluidly coupleable to the near-vacuum of outer space, such that the compaction piston portion of the connector arm is configured to move within the compaction chamber to compact waste material contained within the compaction chamber in response to movement of the drive piston portion of the connector arm within the drive chamber.

Embodiments of the present disclosure are directed to new and improved self-contained compactor systems incorporating a straight-push cylinder design, in which the compactor system is actuated in a horizontal direction. The improved design accommodates increased storage volume, long wear parts, simplified reservoir cleaning, and easier external access to the components, cylinders, and hoses of the self-contained compactor system.

Provided is an automatic roll-to-roll quick press for flexible plates. The quick press comprises a lower film part and an upper film part parallel and movably attached to the lower film part. A right end of the lower film part is vertically connected to a transmission belt; a right end of the transmission belt is connected with a first pressing part; a top of the first pressing part is connected with a second pressing part; a second pressing plate part of the second pressing part comprises a flatness detection tube; there are four large infrared detectors inside the flatness detection tube, and four small infrared detectors inside; the detector scans a total of eight directions, and the scanning area covers the entire cylinder.

A waste compaction apparatus may include a housing and a connector arm. The housing may define a drive chamber and a compaction chamber and the connector arm may include a drive piston portion movably positioned within the drive chamber and a compaction piston portion movably positioned within the compaction chamber. The drive chamber may be selectively fluidly coupleable to the near-vacuum of outer space, such that the compaction piston portion of the connector arm is configured to move within the compaction chamber to compact waste material contained within the compaction chamber in response to movement of the drive piston portion of the connector arm within the drive chamber.

A hydraulic press includes a workbench having four corners provided with uprights. The uprights are arranged in two rows front and rear, and the tops of the uprights in each row are connected by an upper beam extending in a left-right direction. Tie rods are inserted in the front and rear of each upright. The tie rods each have an upper end protruding from the top of the upper beam and fixed to the upper beam by an upper nut and a lower end protruding from the bottom of the workbench and fixed to the workbench by a lower nut. A central cylinder is provided at the center of the upper beam. Side cylinders are symmetrically arranged on the left and right of the central cylinder. The lower ends of plungers of the central cylinder and the side cylinders are fixedly connected to a top of a slider.

The press machine includes: a hydraulic cylinder configured to drive a slide; a plurality of hydraulic pumps/motors; a first port of each of which is connected to a first pressurizing chamber of the hydraulic cylinder; a plurality of servomotors axially connected to rotating shafts of the respective hydraulic pumps/motors respectively; a low-pressure accumulator to which second ports of the hydraulic pumps/motors are each connected; a high-pressure accumulator connected to a second pressurizing chamber of the hydraulic cylinder; and a slide position controller configured to control the servomotors so that a position of the slide matches a position corresponding to a slide position command signal based on the slide position command signal from a slide position commander and a slide position signal from a slide position detector.

On-site pressing of field poles for a hydroelectric generator is provided. A field pole may be placed on a press cart and press bars may be placed on top of the field pole. The press cart is moved along a track to transport the field pole to a pressing unit. Hydraulic cylinders in the pressing unit press the field pole and the press bars between the cart and a top plate of the pressing unit to straighten the field pole.

A press brake is provided with a hydraulic cylinder configured to move an upper table and a lower table relative to each other in a vertical direction, and a control unit configured to control a hydraulic circuit of the hydraulic cylinder, in which the control unit manages a predictor of an occurrence of an abnormality in the hydraulic circuit including a first pressure control valve configured to control a back pressure of hydraulic oil on a first port side of the hydraulic cylinder.

A trash compacting apparatus comprising a container, an air pump, one or more inflatable air bladders, a controller unit, and an interface unit is disclosed herein. The apparatus may further comprise an air distributor. The apparatus may operate as a standard trash container and may further comprise a lid. The apparatus may be operated by the user or by a programmable controller unit to inflate the air bladders, thereby compressing trash contained within the apparatus and reducing the total volume of the trash.