A wave generation assembly includes a drive system and a wave generator. The wave generator is coupled to the drive system. The wave generator includes a generator head and a chamber. The generator head is movably positioned within the chamber by the drive system between a first position and a second position. The chamber is positioned below the water surface. The chamber includes a first end positioned near the water surface, and an opposed second end that is below the water surface. When in the first position, the generator head is positioned near the second end of the chamber, and when in the second position, the generator head is positioned near the first end of the chamber. Movement of the generator head from the first position to the second position drives water out of the first end of the chamber to generate the wave along the water surface of the body of water.

The utility model provides a wave-making pump with a novel directional structure, comprising a casing, a motor, an impeller and a fixing device, wherein the motor is fixed in the casing; the impeller is arranged at the output end of the motor; the fixing device is used for fixing the casing; the casing comprises a rear casing and a diversion protective cover arranged on the front side of the rear casing; openings are formed in the two ends of the diversion protective cover; a hollow groove helically extending is formed in the peripheral surface of the diversion protective cover. As the hollow groove helically extending is formed in the peripheral surface of the diversion protective cover, the water flow produced by wave-making pump with the novel directional structure is wider, softer and more uniform, and the aquatic environment closer to the natural ecological water wave is convenient to create.

Examples of a pressure wave generator configured to generate high energy pressure waves in a medium are disclosed. The pressure wave generator can include a sabot carrying a piston. The sabot can further comprise a locking means to lock the piston in a fixed position when the locking means are activated. When the locking means are in a deactivated position, the piston can be released and can move at least partially away from the sabot. The sabot carrying the piston can be disposed within an inner bore of a housing of the pressure wave generator and can move within the inner bore of the housing from its first end toward its second end along a longitudinal axis of the bore. A transducer can be accommodated in the second end of the housing. The transducer can be coupled to the medium and can convert a portion of the kinetic energy of the piston into a pressure wave in the medium upon impact of the piston with the transducer. The sabot carrying the piston can be accelerated by applying a motive force to the sabot. Once accelerated within the inner bore of the housing the sabot can be decelerated by applying a restraining force to the sabot while the piston can be released at least partially from the sabot to continue to move toward the transducer until it impacts the transducer. Examples of methods of operating the pressure wave generator are disclosed.

Examples of a pressure wave generator configured to generate high energy pressure waves in a medium are disclosed. The pressure wave generator can include a sabot carrying a piston. The sabot can further comprise a locking means to lock the piston in a fixed position when the locking means are activated. When the locking means are in a deactivated position, the piston can be released and can move at least partially away from the sabot. The sabot carrying the piston can be disposed within an inner bore of a housing of the pressure wave generator and can move within the inner bore of the housing from its first end toward its second end along a longitudinal axis of the bore. A transducer can be accommodated in the second end of the housing. The transducer can be coupled to the medium and can convert a portion of the kinetic energy of the piston into a pressure wave in the medium upon impact of the piston with the transducer. The sabot carrying the piston can be accelerated by applying a motive force to the sabot. Once accelerated within the inner bore of the housing the sabot can be decelerated by applying a restraining force to the sabot while the piston can be released at least partially from the sabot to continue to move toward the transducer until it impacts the transducer. Examples of methods of operating the pressure wave generator are disclosed.

A wave pool and wave generating mechanism are disclosed. The wave pool includes a bathymetry that includes a dynamically shapeable reef along a length or circumference of a channel that defines the wave pool. The wave generating mechanism includes a foil that has a shape for bi-directionality based on an adjustment of a yaw angle of the foil. The foil can be further controlled to increase or decrease certain surface areas or other angles of interacting with water in the wave pool.

A wave pool and wave generating mechanism are disclosed. The wave pool includes a bathymetry that includes a dynamically shapeable reef along a length or circumference of a channel that defines the wave pool. The wave generating mechanism includes a foil that has a shape for bi-directionality based on an adjustment of a yaw angle of the foil. The foil can be further controlled to increase or decrease certain surface areas or other angles of interacting with water in the wave pool.

A liquid sealing actuator system enables use in anon-contact or low-friction manner. The system includes: an inner shaft having a first end; a hollow outer shaft having a first end that receives the first end of the inner shaft; at least one sealing ring positioned adjacent an internal surface of the hollow outer shaft, wherein the at least one sealing ring has an outer diameter that is less than an inner diameter of the outer shaft, thereby defining an annular seal gap; a mass attached to a distal end of either the inner shaft or the outer shaft; and a pressure source that injects a pressurised fluid into the hollow outer shaft, thereby applying a pressure against both the first end of the inner shaft and the at least one sealing ring that assists in lifting the mass; wherein the system is at least partially immersed in an external liquid such that the at least one sealing ring is submerged in the external liquid and a head of the external liquid above the at least one sealing ring defines a backpressure in the annular seal gap that opposes the pressure applied by the pressure source.

The utility model provides a wave-making pump with a novel directional structure, comprising a casing, a motor, an impeller and a fixing device, wherein the motor is fixed in the casing; the impeller is arranged at the output end of the motor; the fixing device is used for fixing the casing; the casing comprises a rear casing and a diversion protective cover arranged on the front side of the rear casing; openings are formed in the two ends of the diversion protective cover; a hollow groove helically extending is formed in the peripheral surface of the diversion protective cover. As the hollow groove helically extending is formed in the peripheral surface of the diversion protective cover, the water flow produced by wave-making pump with the novel directional structure is wider, softer and more uniform, and the aquatic environment closer to the natural ecological water wave is convenient to create.

A wave generating system can include a water channel for creating a flow of water to produce a standing wave. A water return passageway can circulate the water back to the inlet of the water channel. One or more pipes can extend under the water channel for circulating the water. A water storage chamber can be positioned below the water channel. Water can be stored in the space between the one or more pipes, and the storage water can be isolated from the water being circulated in the system. The system can produce a hydraulic circuit with hydraulic continuity so that water can be efficiently circulated through the water channel and water return passageway. The system can be modular.

A wave generating system can include a water channel for creating a flow of water to produce a standing wave. A water return passageway can circulate the water back to the inlet of the water channel. One or more pipes can extend under the water channel for circulating the water. A water storage chamber can be positioned below the water channel. Water can be stored in the space between the one or more pipes, and the storage water can be isolated from the water being circulated in the system. The system can produce a hydraulic circuit with hydraulic continuity so that water can be efficiently circulated through the water channel and water return passageway. The system can be modular.