10results about How to "Improve energy capture efficiency" patented technology

A space cam type multi-stage quasi-zero stiffness ultra-low frequency vibration isolator capable of capturing high-entropy energy belongs to the technical field of vibration isolation and vibration energy capture. The problem that traditional quasi-zero stiffness vibration isolation devices are difficult to adapt to multi-stage vibration isolation load due to structural limitations is solved, and sensor self-power supply and intelligent detection are realized. The bottom of the positive stiffness spring and guide beam assembly is connected to the base through a bolt and nut, the sliding end is connected to the load platform through a bolt and nut, four groups of negative stiffness piezoelectric beam assemblies are installed on the support in clockwise order, the vertical guide rail of each negative stiffness piezoelectric beam assembly is connected to the load platform through a bolt and nut, four moving cam sliding grooves are connected to the load platform through a bolt and nut in clockwise order, and the deep groove ball bearing in the negative stiffness piezoelectric beam assembly slides into the corresponding cam sliding groove to form a cam pair. The present application can realize multi-stage load quality vibration isolation and sensor self-power supply, and has the advantages of novel structure, low frequency vibration isolation, wide frequency energy capture and flexible design.

This invention discloses an electromagnetic generator and its operating method for converting ultra-low frequency vibration energy, belonging to the field of vibration energy harvesting and micro-power generation technology. It includes a base, an electromagnetic induction component, an inner rotor, a transmission device, and a top cover. The electromagnetic induction component has a central hole, within which the inner rotor is housed. The electromagnetic induction component includes an outer rotor and a stator, arranged vertically opposite each other. The outer rotor has a magnet, and the stator has a coil. The base is connected to the bottom of the inner rotor via a thrust bearing, the middle of the inner rotor is connected to the top cover via a linear bearing, and the top of the inner rotor is connected to the top cover via the transmission device. The inner rotor is also connected to the outer rotor via a one-way bearing. The base is also connected to the top cover via a linear bearing, and a spring is provided between the top cover and the linear bearing. This invention can harvest ultra-low frequency vibration energy from the environment, achieving higher energy harvesting efficiency compared to traditional electromagnetic energy harvesters.

The invention discloses an intelligent wind power generation method and system suitable for a subway piston air shaft, and relates to the field of parameter regulation and control. According to the intelligent wind power generation method and system, the future working condition and the target angle are dynamically predicted by collecting multi-source field data in real time, and threshold value judgment, multiple repeated prediction and a weighted smoothing filtering mechanism are combined; invalid fine adjustment and false triggering caused by instantaneous data jitter are effectively eliminated, a reasonable to-be-adjusted moment is accurately locked, a regulation and control starting opportunity is accurately calculated and pre-planned based on a time-consuming model, and advanced and accurate in-place angle adjustment is guaranteed; and finally, introducing a periodic power deviation closed-loop evaluation iteration mechanism, dynamically and adaptively optimizing a regulation and control trigger threshold value, predicting smoothing times and weight distribution core parameters, continuously correcting the adaptive deviation between initial parameters and complex and variable working conditions, and finally, calculating the optimal power deviation of the complex and variable working conditions. And the energy capturing efficiency, the operation stability and the long-term self-adaptive service performance of the system under complex reciprocating airflow disturbance are remarkably improved.

The application discloses a kind of double rotary valve core rectification type wave energy power generation hydraulic PTO systems and control method.Liquid pressure PTO system's single out rod hydraulic cylinder is connected double rotary valve core rectification module, high pressure oil circuit part, power generation module, low pressure oil circuit part after being connected single out rod hydraulic cylinder again;Displacement sensor is installed on the piston rod of single out rod hydraulic cylinder and is connected mechanical floater, and mechanical floater floats on water surface.The method comprises: the system is placed in wave, and the mechanical floater of the system reciprocates under wave and drives piston rod movement, and finally the electric energy is exported by generator.The application is smoothly and efficiently rectified by double rotary valve core rectification module, and the constant speed of generator and output voltage are realized, the impact on system main oil circuit is reduced, so that it is more stable and easy to control, energy loss is reduced, and the energy capture efficiency of system is improved;Meanwhile, piston rod can smoothly break through dead zone, effectively prolong the system working time, and further improve the system power generation efficiency.

The utility model discloses a kind of counter-rotating ducted current power generation devices, belong to marine engineering technical field, it includes power generation structure, the power generation structure is counter-rotating power generation structure, the counter-rotating power generation structure includes first power generation impeller, second power generation impeller and double-rotor generator, the first power generation impeller and the second power generation impeller are sequentially installed and rotate in opposite directions under the action of sea current, the first power generation impeller is connected with the rotating shaft of the inner rotor of double-rotor generator by first power generation input shaft, the second power generation impeller is connected with the rotating shaft of the outer rotor of double-rotor generator by second power generation input shaft. The utility model not only can improve wide flow rate adaptability, increase sea current power generation efficiency, but also can improve the capture efficiency of multidirectional sea current.

The invention discloses a buoy and a control method thereof, the buoy comprises a floating body, a deformation wing and an adjusting mechanism, the deformation wing is connected with the floating body, and the deformation wing is provided with a containing cavity; the adjusting mechanism is arranged in the containing cavity and comprises a driving assembly and an adjusting assembly, the fixed end of the driving assembly is connected with the deformation wing, the driving end of the driving assembly is hinged to the adjusting assembly, and the adjusting assembly is hinged to the deformation wing. The driving assembly can drive the adjusting assembly to adjust the shape of the deformation wing so as to adjust the inherent frequency of the buoy. The inherent frequency of the buoy can be adjusted, so that dynamic adjustment of the inherent frequency of the buoy is realized, resonance with waves in a wider frequency range can be realized, nearly optimal capturing efficiency is kept in the wider frequency range, and the energy capturing efficiency of the buoy under different sea conditions is improved.

An omni-directional water flow metamaterial energy gathering device comprises a power generation system and an energy gathering array structure, the power generation system comprises a hydro-generator, the hydro-generator is fixed to the top of a supporting column, and the supporting column is fixed to an underwater base; the energy gathering array structure comprises a support and a plurality of groups of energy gathering structures, the support is fixedly connected with the supporting column, and the plurality of groups of energy gathering structures are fixed on the support; wherein each energy gathering structure comprises a plurality of energy gathering units, and each energy gathering structure is vertically arranged in the normal direction of the supporting column; the energy gathering unit is of a cylinder structure, the section of the energy gathering unit is in an NACA0012 wing shape, and the tip end of the energy gathering unit points to the supporting column. By means of the energy gathering array structure, efficient gathering and optimized utilization of water flow energy are achieved, the requirement for the starting water flow speed of the hydro-generator is lowered, the energy conversion efficiency of the hydro-generator under different water flow conditions is improved, and therefore the overall performance and stability of a power generation system are enhanced.

This invention relates to a prefabricated omnidirectional wave energy capture structure and construction method for a circular caisson independent pier, belonging to the field of port hydraulic structures and marine renewable energy utilization technology. The structure is a fully integrated structure of an oscillating water column wave energy device and a circular caisson, including a modular circular caisson energy capture unit, a sealing and anti-corrosion unit, and a top connection and confluence unit. This invention employs a four-chamber annular symmetrical independent sealing layout to achieve 360° omnidirectional energy capture without blind spots; it uses a prefabricated energy-concentrating guide sill to concentrate wave energy and amplify the water column oscillation amplitude; the epoxy-modified cement-based sealing material of this invention can be directly applied to high-humidity surfaces; through secondary connections of water-stop rubber, prefabricated cover plates, and wet joints, it achieves overall structural stability and long-term sealing of the air chambers; the four independent flanges share a single turbine unit, with each chamber having independent air intake without cross-flow or backflow. This invention is convenient to construct, has reliable sealing, stable structure, and high energy capture efficiency, demonstrating significant engineering and industrialization promotion value.

The application discloses a cloud-edge collaborative energy management method and system for low wind speed power generation, belongs to the technical field of new energy power generation, and is applied to a three-layer integrated architecture including a device layer, an edge layer and a cloud platform layer. The method comprises the following steps: an edge computing gateway collects rotor angular velocity and real-time wind speed in real time, obtains real-time air density through a micro-meteorological monitoring station after determining that an efficiency enhancement mode is entered, calculates target aerodynamic torque and torque gap, generates a compensation power instruction and verifies the state of charge of a hybrid energy storage module, drives a bidirectional current conversion module to make the generator run in a short-time electric mode when conditions are met, compensates for the torque gap in an active injection mode, and maintains the optimal rotating speed. The system comprises a cloud platform server cluster, an edge computing gateway, a bidirectional current conversion module, an active magnetic suspension bearing driver, a hybrid energy storage module and a micro-meteorological monitoring station. Through cloud-edge collaboration and end-side closed-loop iteration, the application realizes efficient energy capture in a low wind speed interval and efficiency optimization in the whole life cycle.

The application relates to a piezoelectric-electromagnetic-friction electricity composite generator for energy capture of highway vehicle operation, which is composed of a deceleration belt (1), a power transmission part (2), an electromagnetic part (3), a friction electricity part (4) and a piezoelectric part (5). The bevel gear set mechanism is adopted to transmit the external excitation to each power generation part to realize simultaneous power generation and improve the energy capture efficiency. The application relates to the field of nanometer generators, and particularly relates to the piezoelectric-electromagnetic-friction electricity composite generator for energy capture of highway vehicle operation.