197results about How to "Improve energy recovery efficiency" patented technology

The invention relates to an engine waste heat recovery system based on organic rankine cycle, specially a waste heat recovery system for heavy engine. The whole system comprises a plurality of heat exchanger, an energy converting apparatus (turbine power generation apparatus) and corresponding link pipe and valve, wherein the waste heat recovery unit includes a boiling device unit comprising an engine waste gas recycling cooler, an overheating unit and an engine waste gas cooling unit or the like, a reheater of refrigerant, a precooler for pressed air. The working fluid of the whole system is refrigerant such as R245fa. The present waste heat recovery system is more efficient in energy recovery then the waste heat recovery systems in prior art, the operation is more stable, the structure is more compact, and the problem of aluminum material application limitation due to double stage boosting of the high boosting of the engine is solved.

The invention relates to the field of vehicle control, in particular to a nonlinear model prediction control method of regenerative braking of an electric vehicle. The method adopts a nonlinear model prediction control strategy of a rapid system, on the basis of establishing an electric vehicle regenerative braking nonlinear model, subsystem operating state signals, acquired by sensors, of the entire vehicle, wheels, suspensions and motors in the braking process of the electric vehicle are acquired, and multiple purposes, namely controlling speed accurately, guaranteeing vehicle stability, improving driving smoothness and regenerative braking energy recovering efficiency, in the braking process are controlled coordinately. The control system is mainly applied into the driving and braking processes of traditional vehicles and electric vehicles, especially the multipurpose controlling process of strong nonlinear systems.

The invention discloses a hydraulic driving system for an offshore drilling compensation winch.A hydraulic secondary regulation element and a driven hydraulic cylinder jointly drive the winch to fulfill a heave compensation function, and a bit feeding hydraulic motor drives the winch to fulfill an automatic bit feeding function.During compensation, the driven hydraulic cylinder and a liquid-gas energy storage device thereof are used or bearing all static loads of a drilling rig and periodically recovering and releasing gravitational potential energy of loads; the hydraulic secondary regulation element operates in a constant-pressure network to overcome other loads in the compensation process, and the liquid-gas energy storage device periodically recovers and releases inertia kinetic energy of the a winch rotary system.During bit feeding, the driven hydraulic cylinder and the liquid-gas energy storage device thereof recover the gravitational potential energy of the loads of the drilling rig and release in lifting of a drilling rig traveling system.The hydraulic driving system is integrally compact in structure, a hydraulic energy recovery system is high in operation efficiency and long in service life, and an engine is low in power and power consumption.

The invention provides an intelligent braking control system of a pure electric passenger car and a control method of the intelligent braking control system. The braking control system comprises wheel speed sensors, an accelerating pedal device, accelerating pedal sensors, a braking pedal device, braking pedal sensors, a motor braking system, a pneumatic braking system and a controller VCU, wherein the pneumatic braking system comprises an air braking assembly, a conventional travelling braking air channel, a driving anti-skid braking air channel and a parking braking air channel, wherein the air braking assembly is formed by an air compressor, an unloading valve and a four-circuit protection valve which are sequentially connected; the control method of the braking control system comprises a conventional braking control method, an ABS control method and a driving anti-skid control method, and a corresponding braking strategy is selected according to the braking strength Z and a battery SOC situation. According to the intelligent braking control system and the control method thereof disclosed by the invention, under the premise that the braking safety is guaranteed, the braking energy recovering rate is improved.

The invention discloses a hydraulic decoupling type electro-hydraulic braking system which comprises a pedal displacement sensor for collecting a stroke of a pedal assembly, wherein a first isolationvalve and a second isolation valve are respectively arranged on outlets of a first cavity and a second cavity of a master cylinder; the outlet of the first cavity of the master cylinder is connected with an inlet of a simulator control valve in parallel; a liquid storage tank is connected with the first cavity and the second cavity of the master cylinder, an active pressure buildup unit and a pedal feel simulator of the master cylinder are connected by a pipeline; a one-way valve is arranged on a parallel pipeline; a first hydraulic pressure sensor is arranged in the second cavity of the master cylinder; a second hydraulic pressure sensor is arranged at the outlet of the active pressure buildup unit; a self-check valve is arranged between the first cavity of the master cylinder and the outlet of the liquid storage tank; a first suction valve and a second suction valve are arranged at the outlet of the active pressure buildup unit in parallel; the pipeline where the first suction valveis located is connected between the first isolation valve and the ESC module; the pipeline where the second suction valve is located is connected between the second isolation valve and the ESC module;and an ECU controls the self-check valve, the first isolation valve, the second isolation valve, the first suction valve, the second suction valve, the simulator control valve and the active pressurebuildup unit.

The invention relates to a fluid electric energy feedback type semi-active control shock absorber system. The fluid electric energy feedback type semi-active control shock absorber system mainly comprises a dual-cylinder hydraulic damping module and a fluid electric energy feedback control module. The dual-cylinder hydraulic damping module comprises a hydraulic working cylinder, an oil storage cylinder, a piston, a hollow piston rod, a compression valve and a compensation valve. The fluid electric energy feedback control module is composed of a hollow piston rod adapter, an energy accumulator, an oil storage cylinder adapter, a hydraulic energy feedback pipe, a hydraulic motor, a power generator and a load control circuit. A round hole is formed in one outer wall of the oil storage cylinder in a drilling mode, and the oil storage cylinder adapter is welded through the round hole. An oil outlet is led out of the top end of the hollow piston rod in the hydraulic working cylinder in the radial direction, and the hollow piston rod adapter is welded to the oil outlet. The fluid electric energy feedback type semi-active control shock absorber system has the beneficial effects that the fluid electric energy feedback type semi-active control shock absorber system can be formed by transforming a traditional dual-cylinder hydraulic damper, on the premise that the basic requirement of automobiles for the damping property of dampers is met, mechanical energy consumed by vibration of a suspension is recycled and converted to electric energy, and the purpose of energy conservation of automobiles is achieved.

The invention discloses a slewing system for a hybrid hydraulic excavator and a driving and braking method for the slewing system, and belongs to the technical field of hydraulic systems of excavators. The invention solves the problem that the energy recovery efficiency is low when the conventional slewing system of the hybrid hydraulic excavator is braked. The slewing system comprises a variabledisplacement pump, a multiway valve, an electro-hydraulic proportional throttle valve, a one-way valve, an electric control switch valve, a first hand-operated direction valve, a second hand-operateddirection valve, an overflow valve, a hydraulic pump/motor, a hydraulic accumulator, a pressure sensor and a controller. Based on the driving and braking method for the slewing system, the first hand-operated direction valve is adjusted to an upper position and the second hand-operated direction valve is adjusted to a middle position, so that the slewing system enters a hybrid mode with an energyrecovery function, and the slewing system is driven and braked in the mode by utilizing the characteristic that the hydraulic pump/motor can work in four quadrants. The slewing system is suitable forthe hybrid hydraulic excavator.

The invention discloses a dish-washing machine. The dish-washing machine comprises a water tank, a main cavity body (14) and an air flue (28) used for recycling heat from the main cavity body (14). The dish-washing machine further comprises a heat pump system; an evaporator (20) of the heat pump system is installed in the air flue (28) to absorb the heat in the air flowing through the air flue (28); a condenser (23) of the heat pump system is provided with a waterway used for absorbing the heat; the waterway is connected with a water tank to form a circulating waterway, so that water in the water tank is heated. By adding the heat pump system, the dish-washing machine can significantly improve drying and energy recovery efficiencies, thereby reaching the purposes of reducing overall power consumption and saving energy.

The invention discloses a braking system and a braking method of a double-shaft driven electric vehicle. The braking system comprises a whole vehicle control device, a mechanical braking control device and a regenerative braking control device, wherein the mechanical braking control device and the regenerative braking control device are connected with the whole vehicle control device, the regenerative braking control device comprises a front drive motor and a rear drive motor, the front drive motor is connected with a front wheel drive shaft of the electric vehicle through a gear, the rear drive motor is connected with a rear wheel drive shaft of the electric vehicle through a gear, the regenerative braking control device also comprises a front energy storage module and a rear energy storage module, the front energy storage module is electrically connected with a controller of the front drive motor, the rear energy storage module is electrically connected with a controller of the rear drive motor, and the front energy storage module and the rear energy storage module are electrically connected through a DC/DC converter. According to the invention, through respectively adding a drive motor on the front and rear wheel axles of the electric vehicle and respectively arranging an energy storage module on each drive motor, the efficient braking energy recovery is facilitated while the dynamic property of the electric vehicle is ensured.

The invention discloses a truck vibration energy recovery system. The truck vibration energy recovery system comprises a leaf spring, an enlarged lifting lug, a connecting rod mechanism, a double-acting air cylinder and an air storage tank which are sequentially connected, wherein one end of the leaf spring is connected to a frame, and the other end of the leaf spring is connected to the enlarged lifting lug; one end of the enlarged lug is connected to the frame through a revolute pair, and the other end of the enlarged lug is connected with the connecting rod mechanism through a revolution pair; and an air cylinder piston in the double-acting air cylinder is connected with the connecting rod mechanism. According to the truck vibration energy recovery system, the working stroke is enlarged through the enlarged lifting lug, the switching of motion forms is realized through the unique motion trail of the enlarged lifting lug and the connecting rod mechanism, the using reliability and the energy recovery efficiency are improved, and the problems of low energy recovery efficiency and complex structure due to vertical arrangement of an energy feedback type cylinder as well as poor reliability due to longitudinal arrangement of the energy feedback type cylinder are solved.

The invention discloses an electric automobile regenerative braking force distribution method integrating road surface identification, and belongs to the field of electric automobile energy recovery. The method can ensure that a vehicle has good braking efficiency and obviously improves the energy recovery efficiency of the vehicle. The electric automobile regenerative braking force distribution method integrating road surface identification comprises the following steps: firstly, determining structural parameters of a whole automobile by establishing a vehicle model; obtaining three easily-obtained state information of a vehicle, like current longitudinal acceleration, lateral acceleration and front wheel rotation angle through a sensor, and obtaining a current road surface adhesion coefficient based on extended Kalman filtering estimation; then obtaining the current braking strength of the vehicle through calculation by a main cylinder pressure sensor, and judging whether the vehicle is in an emergency braking state or not; and if the vehicle is in a non-emergency state, under the premise of ensuring the driving safety of the vehicle, obtaining a front axle and rear axle braking force distribution coefficient based on table looking up of the magnitude of the road surface adhesion road surface and the braking strength, and then distributing the hydraulic braking force and the regenerative braking force by the front axle total braking force in a serial distribution mode.

The invention discloses an energy recycling system and method for a liquid hydrogen fuel cell car. The system comprises a superconducting coil, a superconducting switch, a full-bridge type direct current chopper, a superconducting current lead, a direct current link capacitor, a DC-AC bilateral transducer, a vehicle-mounted motor and a measurement and control system, wherein the superconducting coil is immersed in a liquid hydrogen container, the superconducting switch and the full-bridge type direct current chopper are installed in a low-temperature Duval, and the superconducting current lead, the direct current link capacitor, the DC-AC bilateral transducer, the vehicle-mounted motor and the measurement and control system are arranged in a low-temperature hydrogen pipeline. The superconducting current lead is used for connecting the superconducting coil, the superconducting switch and the full-bridge type direct current chopper. The low-temperature hydrogen pipeline is used for connecting a liquid hydrogen fuel cell, the liquid hydrogen container and the low-temperature Duval. Compared with the prior art, the energy recycling system has the advantages that the superconducting coil is cooled directly through vehicle-mounted liquid hydrogen, the superconducting current lead, the superconducting switch and the full-bridge type direct current chopper are cooled directly through the low-temperature hydrogen produced through gasification of the vehicle-mounted liquid hydrogen, a supermumetal energy storing device is actually used in the liquid hydrogen fuel cell car, the brake energy recycling and reutilizing ratio of the car is improved, and staring time and accelerating time of the car are shortened.

The invention discloses a method of starting a microbial fuel cell by adding inoculum to treat cow dung fermentation biogas slurry, relates to the field of environment, biology, energy resources and electrochemistry, in particular to a method of quickly starting the microbial fuel cell and treating the cow dung biomass slurry to generate power and aims to overcome the defect that conventional anaerobic fermentation methods are long in starting period and incapable of completely treating biomass slurry. The method includes following steps: 1, preparing a microbial fuel cell culture medium for adding; 2, adding the culture medium into the microbial fuel cell, and inoculating the inoculum (activated sludge and domestic sewage) to the microbial fuel cell; utilizing a lead to connect a resistor of 500-1000Omega to a cathode and an anode of the microbial fuel cell to form a closed loop, and connecting the lead with the resistor and a multichannel data collection card; 4, replacing the culture medium to start the microbial fuel cell, and comparing influence of adding of the inoculum on the microbial fuel cell.

A pure water production apparatus and method are provided that effectively use an isobaric type energy recovery unit that can efficiently recover energy against feed water variation. In a pure water producing method supplying and having a plurality of kinds of feed water with different water qualities permeated through a semi-permeable membrane to produce the pure water, a portion (referred to as first feed water) of the plurality of kinds of feed water supplied to a semi-permeable membrane unit comprising the semi-permeable membrane is boosted by utilizing an isobaric type energy recovery unit that recovers pressure energy of concentrate discharged from the semi-permeable membrane unit, the rest (referred to as second feed water) of the plurality of kinds of feed water is boosted by a high pressure pump, and the boosted first and second feed water are supplied together to the semi-permeable membrane unit.

The invention discloses a brake energy feedback system based on improvement brake pedal feel. The brake energy feedback system is characterized in that an oil outlet of a liquid storage chamber is connected with a front wheel brake oil line of a pressure regulator; an oil outlet of a brake main cylinder is connected with a rear wheel brake oil line of the pressure regulator; the other oil outlet of the brake main cylinder is connected with a stroke simulator; a main cylinder pressure sensor is arranged on a pipeline connected with the brake main cylinder and the rear wheel brake oil line of the pressure regulator; and a wheel cylinder pressure sensor is arranged on one wheel cylinder in the front wheel brake oil line of the pressure regulator. The main cylinder pressure sensor, the wheel cylinder pressure sensor and an oil returning electric motor for supplying oil to a front wheel and a rear wheel are controlled by a brake controller. The brake controller and a drive electric motor are controlled by a hybrid vehicle controller. The invention can ensure the same brake pedal feel as the traditional vehicle, recover the brake energy maximally, realize the functions of ABS (Anti-skid Brake System), ASR (Acceleration Slip Regulation), ESP (Electronic Stability Program), and the like, and extend the driving range of electric driven vehicles.

The invention relates to the technical field of automobile braking and aims to provide an electric automobile brake pedal signal analytic method. The analytic method comprises the steps that when a signal output by a brake switch is invalid, a complete vehicle control unit judges that an automobile is in a non-braking state, meanwhile, a voltage value output by an analog quantity sensor is detected to be in a zero potential value range, the complete vehicle control unit judges that the automobile is in a zero potential state, and a received voltage signal is calibrated as a zero potential value; when the signal output by the brake switch is valid, the complete vehicle control unit judges that the automobile is in a braking state, and distributes electric braking torque values to an energy recovery system according to the voltage value output by the analog quantity sensor; and when the signal output by the brake switch is invalid, the voltage value output by the analog quantity sensor is not in the zero potential value range, the complete vehicle control unit judges that a braking system is in a failure state, and the complete vehicle is controlled to start a parking mode. By adopting the method, the energy recovery efficiency is improved, and accurate determining of output failures is achieved.

The invention discloses an active control system and control method for the pressure of a hydraulic accumulator. The active control system comprises high-speed switch gas valves, a pressurizing cylinder, the hydraulic accumulator, a gas bottle, a two-position two-way air-operated reversing valve, a controller and the like. When the hydraulic accumulator is in an oil liquid recycling state, nitrogen in a gas bag is gradually pressed into the gas bottle through the pressurizing cylinder while hydraulic oil enters the hydraulic accumulator, and then active control over the pressure of the hydraulic accumulator is achieved; when the hydraulic accumulator is in an oil liquid releasing state, high-pressure gas in the gas bottle enters the gas bag of the hydraulic accumulator through the high-speed switch gas valves to press stored oil liquid into a system loop, and then the pressure of the hydraulic accumulator is controlled to be at a constant value. According to the active control system and control method, active control over the pressure of the hydraulic accumulator can be achieved, the problem that in a hydraulic energy recycling system, the recycled pressure oil releasing process is uncontrollable and incomplete due the fact that the pressure of the hydraulic accumulator is passively controlled is solved, and the energy recycling rate and utilizing rate are increased.

A pressure reduction device capable of recycling fluid energy comprises a throttling component, a pressure control mechanism and a turbine. The turbine is installed at the fluid outlet end of the throttling component so that accelerated fluid of the throttling component can impact on an impeller of the turbine after throttling. The impeller rotates under the fluid impact, then a turbine rotor is driven to rotate together, the mechanical energy of the turbine rotor is output through a transmission component or an energy conversion device, and fluid energy recovery is achieved. Meanwhile, the pressure of the fluid is reduced under the fluid resistance action of the throttling component and the turbine. The pressure control mechanism controls the fluid pressure at the fluid outlet end of the turbine by adjusting the opening degree of the throttling component and/or the rotation resistance of the impeller so that the fluid pressure can be kept in an error range of a set value all the time. The accelerated fluid after throttling of the throttling component impacts on the impeller to apply work, more energy is converted into the mechanical energy of the turbine rotor, and thus the fluid energy recovery efficiency is improved. The pressure reduction device is simple in structure and easy to manufacture, wide application is facilitated, and a large amount of energy can be saved.

The invention relates to the field of electric automobiles and in particular relates to a three-clutch three-gear speed change transmission device for changing the speed of an electric automobile and a three-clutch method thereof. The three-clutch three-gear speed change transmission device comprises a box body, wherein an input shaft and an output shaft sleeved on the input shaft are arranged in the box body; the input shaft is connected with the output shaft through a first clutch; a first middle shaft and a second middle shaft are arranged in the box body; the first middle shaft is connected with the second middle shaft through a second clutch; a third middle shaft and a fourth middle shaft are arranged in the box body; the third middle shaft is connected with the fourth middle shaft through a third clutch; and the shafts are provided with gears which have different sizes and are meshed with one another. When the second clutch is controlled to be closed, the automobile can get relatively large traction and relatively large torque at a low speed; when the first clutch is closed, a motor is in a stable running state; when the third clutch is closed, the rotating speed of the motor is increased to a designed value; and therefore, the requirement of the electric automobile on high rotating speed is met.

The invention provides a differential pressure booster-type energy recovery device based on a reverse osmosis system. The differential pressure booster-type energy recovery device comprises a two-position four-way reversing valve, a first hydraulic cylinder and a second hydraulic cylinder, wherein the first hydraulic cylinder is provided with a piston and a piston rod of the first hydraulic cylinder; and the second hydraulic cylinder is provided with a piston and a piston rod of the second hydraulic cylinder. The device has high energy recovery efficiency; a high pressure booster pump is not required, and the pressure of low-pressure raw material water can be directly boosted to a water inlet pressure of the reverse osmosis system by utilizing the recovered energy, so that stable pressure energy conversion is realized and the equipment investment and equipment selection difficulty are reduced; and simultaneously, the water yield of the reverse osmosis system utilizing the differential pressure booster-type energy recovery device can be changed by adjusting the flow of a high pressure pump or the flow of the energy recovery device.

The invention discloses an electrochemical membrane bioreactor. The electrochemical membrane bioreactor comprises an anode chamber, an anode, a filtering separation membrane and an air cathode, wherein a water inlet pipe is arranged on the anode chamber, an electro-microorganism is adhered to the anode, the anode and the air cathode are connected through a conducting wire, the anode chamber is of an enclosed structure, a through hole is formed in the wall of the anode chamber, a filtering separation membrane is sheathed on the outer side of the through hole, the air cathode is sheathed on the outer side of the filtering separation membrane, and a cathode microorganism is adhered to the air cathode. The electrochemical membrane bioreactor provided by the invention has the advantages that after waste water is sequentially treated through the anode, the filtering separation membrane and the cathode, high-quality effluent is obtained, and the air cathode is exposed in air, so that the energy consumption behaviors such as manual aeration and oxygenation are avoided, thus the energy consumption is reduced while wastewater is treated.

The invention discloses a double-motor hybrid power system for a pure electric automobile. A double-motor and double-battery mode is used in the system. The system comprises a battery A, a controller A, a motor A, a battery B, a controller B, a motor B, a linkage device, a transmission device and an axle differential wheel, wherein the battery A and the battery B are connected with the controller A and the controller B respectively; the controller A and the controller B are connected with the motor A and the motor B respectively; the motor A and the motor B are connected with the linkage device; the linkage device is connected with the transmission device; and the transmission device is connected with the axle differential wheel. In the system, two sets of batteries are used for cooperative operation; when the energy of one set of battery is lower than a certain value, the system can be automatically switched to the other set of battery, so that the phenomena of anchoring on the road, over-discharge of the batteries and the like are prevented, and a main motor is kept to be operated in a high-efficient area; and the system has the advantages of high energy recovery rate, high utilization rate, long continuous driving distance, long service life of the batteries and the like.

The invention relates to a fold-shaped compound piezoelectric energy converting structure, and belongs to the technical field of piezoelectric energy conversion. The fold-shaped compound piezoelectric energy converting structure is characterized in that: the fold-shaped compound piezoelectric energy converting structure comprises a fold-shaped elastic conductive body of which the arc corner is reinforced with a rigid connecting block (2); the upper and lower surfaces of a horizontal section (1) of the fold-shaped elastic conductive body are respectively adhered with an upper-layer piezoelectric film (4) and a lower-layer piezoelectric film (5) in an equidirectional way; the upper side of the upper-layer piezoelectric film and the lower side of the lower-layer piezoelectric film are adhered with conductive adhesive layers (3); and one electrode end of the fold-shaped compound piezoelectric energy converting structure is led out through the fold-shaped elastic conductive body, while the other electrode end is led out through the conductive adhesive layers. The structure can generate large electric charge output while having large deformation, is firm, saves raw materials, has simple manufacture process, and can be widely applied as an energy transducer to a vibrational energy recovery system.

The present invention relates to a spring energy-collecting device which can be used for storing, releasing and using the energy of vehicle brake, and belongs to the technological field of carrying tools. In the technical proposal, a vehicle shaft is dynamically provided with a fitting external shaft lining pipe, and is fixedly provided with a torque input rubber wheel and a torque output rubber wheel; the external shaft lining pipe is connected with the spring shell through a swinging shrapnel; the spring shaft is respectively provided with an upper spring rubber wheel which exactly faces the torque output rubber wheel, an output gear which is connected with a spring output rubber wheel in the way of transmission, a one-way ratchet; the spring output rubber wheel exactly faces the torque input rubber wheel; the external shaft lining pipe is provided with an electromagnet, which is arranged close to the torque output rubber wheel and provided with an open-close contact arranged in the position of the brake; an electromagnet is arranged close to the torque input rubber wheel and provided with open-close contact arranged in the position of the accelerator. The spring energy-collecting device has the advantages of simple structure, small loss of energy and light weight, and is suitable for light electric vehicles.

The invention provides an electric-hydraulic reversing energy recovery device, which is simple in control and less in pressure oscillation. The device comprises an electric-hydraulic reversing valve, two pressure exchanging pipes and four unidirectional check valves. A free piston is arranged in each pressure exchanging pipe to divide the pressure exchanging pipe into two working cavities which are a transmitted liquid working cavity and a waste liquid working cavity. The device has the following beneficial effects that because the electric-hydraulic reversing valve is piloted by using a magnetic pilot valve, and the main valve is pushed by the high pressure waste liquid which is manipulated and controlled by the magnetic pilot valve in the system pipeline, the pushing power can be very large, the operation is simple, and the reversing is stable and fast. The electric-hydraulic reversing energy recovery device is suitable for a reverse osmosis desalination system with high pressure and large flow rate.