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8359 results about "Hydraulic motor" patented technology

A hydraulic motor is a mechanical actuator that converts hydraulic pressure and flow into torque and angular displacement (rotation). The hydraulic motor is the rotary counterpart of the hydraulic cylinder as a linear actuator. Most broadly, the category of devices called hydraulic motors has sometimes included those that run on hydropower (namely, water engines and water motors) but in today's terminology the name usually refers more specifically to motors that use hydraulic fluid as part of closed hydraulic circuits in modern hydraulic machinery.

Energy recovery system of hybrid power engineering machinery energy accumulator-hydraulic motor

The invention discloses a hybrid power engineering mechanical accumulator-hydraulic motor energy recovery system. The system mainly comprises an engine, a variable pump, variable frequency motors, a variable motor, a signal control unit, an accumulator and a hydraulic implementation element, and the like. In the system, the variable motor is coaxially connected with a variable frequency motor M2 and forms a composite energy recovery system with the accumulator so as to recover the gravitational potential energy and braking energy in the lowering process of an implementation mechanism. The variable pump, the engine and a variable frequency motor M1 are coaxially connected; a hybrid power system which consists of the engine and the variable frequency motor M1 drives the hydraulic implementation mechanism to rise and lift heavy objects together with the accumulator. The system overcomes the defects that the variable motor-power generator energy recovery system responds slowly and the specific energy of the accumulator is low, enhances the dynamic response performance of the energy recovery system, improves the working conditions of power generation of an electric generator, and simultaneously can directly recover part of potential energy by the accumulator, thus raising the energy recovery efficiency of the system.

Wave, wind and light comprehensive electricity generation ship on sea

The invention discloses a wave, wind and light comprehensive electricity generation ship on the sea in the technical field of development and utilization of ocean renewable energy sources. Floaters are installed on the two sides of a hull respectively, the floaters vibrate up and down under the action of waves, and wave energy is firstly translated into mechanical energy and then translated into high-pressure energy of hydraulic oil through a hydraulic transition system; a perpendicular shaft wind machine is installed on a deck of the hull, wind rotors rotate under the action of blown wind, and wind energy is firstly translated into mechanical energy and then translated into high-pressure energy of the hydraulic oil through the hydraulic transition system; the hydraulic oil carrying the high-pressure energy works through impacting a hydraulic motor and drives a direct driven electric generator to generate electricity; a photovoltaic cell square matrix is installed on the deck of the hull to absorb solar energy and translate the solar energy into electric energy. The wave, wind and light comprehensive electricity generation ship solves the problems that electricity generation with ocean energy resources is high in unit cost, poor in stability and the like, and greatly improves competitive power of the development and utilization of the ocean renewable energy sources due to the high flexibility of a system.

Vehicle system to recapture kinetic energy

A fluid drive system that can be used to drive a vehicle and has energy regeneration and storage capabilities. The fluid drive system includes an electrical energy supply source mounted on the vehicle, at least one electrical motor electrically connected to the electrical supply source, and a hydraulic pump driven that may be of the variable displacement type by the electrical motor. The fluid drive system may also include a low pressure hydraulic fluid supply tank supplying fluid to the hydraulic pump, at least one pneumatically charged accumulator tank for storing pressurized hydraulic fluid, a combination hydraulic motor and pump that may also be of the variable displacement type being alternately driven by the hydraulic pump and the pneumatically charged accumulator tank; and an electrical regeneration system for regenerating the electrical energy supply. The electrical regeneration system may be powered by hydraulic fluid from the combination electrical motor and pump. The combination hydraulic motor and pump propels the vehicle during acceleration and speed maintaining operations and may also serves as a braking mechanism during deceleration of the vehicle. The combination hydraulic motor and pump may also pump hydraulic fluid into the pneumatically charged accumulator tank during at least a portion of the time that the vehicle is decelerating. The combination hydraulic motor and pump may further pump hydraulic fluid for powering the electrical regeneration system when the pneumatically charged accumulator tank is fully pressurized. The electrical regeneration system also has the ability to recharge the electrical energy supply while the vehicle is stopped using stored recovered kinetic energy.
Owner:PARKER I L L C +1

Method and apparatus for converting ocean wave energy into electricity

A power-generating device located in or on the surface of the ocean for generating power utilizing the energy in ocean wave motion. The device is moored to the bow and stern at ˜45° to incoming ocean waves, and with a yawing capability to adjust to change in wave direction. The device delivers power to a shore grid via a submarine cable from a generator. A rotational driving torque to the generator is produced by two long counter-rotating drive tubes, which are held by bearings in the bow hull and the stern hull of the device. As an alternative, hydraulics may be employed for energy capture and power smoothing and used to provide the rotational torque through a hydraulic motor to drive a generator. The main body is partially submerged and has multiple pod floats connected to the structure by rocker arms with bearings through which the drive tubes pass or double-acting hydraulic rams between the arms and the main body, which capture energy through pod displacement and store it in accumulators. Rotary torque of the drive tubes is produced when the pods move up and down according to motion of the waves and is transmitted to the generator to generate power. In the hydraulic case, energy is stored in accumulators as pressure due to the double-acting hydraulic pistons pumping when the pods move up and down according to the motion of the waves. Hydraulic pressure drives a pump, which provides torque to the generator.

Brush chipper and methods of operating same

An improved brush cutter having an upper feed control member with stop, forward, neutral, and reverse positions also has a lower feed stop member with selectable sensitivity. Another aspect of the invention is to predict the feed roller shutoff point according to the rate of engine deceleration. According to another aspect, when the feed rollers stop feeding material into the cutters, to overcome drag on the cutters, a controller stops the feed rollers and then reverses them for a short time, and then reverses the rollers again if the problem is still present. To prevent jamming, a pressure switch senses when oil in a hydraulic motor system for rotating the feed rollers is too high and the controller momentarily reverses the feed rollers and then causes them to go forward, a cycle which can occur several times until the feed rollers are no longer stalled. By another aspect of the invention, the controller senses characteristics of the brush cutter and chooses an operating system based on the characteristics sensed. The controller can also sense if the brush chipper has not been used for a predetermined period of time and automatically reduce the idle speed of the engine until the brush chipper is used again, and then automatically return the engine to a normal idle speed before the feed rollers will pull brush into the brush chipper.

Intelligent photovoltaic array washing car

The invention provides an intelligent photovoltaic array washing car used for washing photovoltaic arrays of a large-scale ground photovoltaic power station. A washing head supporting and locating unit and a power unit are arranged on the head portion and the tail portion of a crawler base respectively, a water storage unit is arranged adjacent to the power unit, and a washing head unit is provided with range finder sensors used for measuring the distance between the washing head unit and solar cell panels; the washing head supporting and locating unit comprises a movable base capable of rotating and transversely moving and a working arm set provided with a main arm and an end arm, wherein the main arm and the end arm can pitch respectively; a water pump of a water supply unit is driven by a hydraulic motor; a computer is used as a control kernel of a main control module of an operation control unit; a pair of proportional directional valves of the hydraulic control unit controls two base crawler traveling motors, and other directional valves are electromagnetic directional valves controlled by the main control module. According to the intelligent photovoltaic array washing car, the position and the posture of the washing head unit relative to photovoltaic array panels and the position and the posture of a car body relative to the photovoltaic arrays can be automatically controlled, and the intelligent photovoltaic array washing car is intelligent, efficient, flexible in operation, high in adaptability, easy and convenient to operate, concise in structure and good in washing effect.

Electrohydraulic energy-regenerative type shock absorber

The invention relates to an electrohydraulic energy-regenerative type shock absorber, which comprises a hydraulic circuit, a working chamber and a piston, wherein the working chamber is divided into a piston working cavity and an accumulating power-generating cavity by a partition plate (13), and the piston is positioned in the piston working cavity and is connected with an external upper mounting base (7) through a piston push rod (8); a hydraulic motor (4) is positioned in the energy storage power-generating cavity and is connected with an external rotary generator (5) through a driving shaft, and an accumulator (3) is positioned in the accumulating power-generating cavity and is positioned below the partition plate (13); and the hydraulic circuit and a plurality of one-way valves (6) form a hydraulic rectifier bridge, and the hydraulic circuit adopts the method that an external pipeline is arranged outside the piston or the piston is designed to form internal and external cavities. The invention has simple structure, fewer components and small volume, can allow the energy generated by vehicle vibration to be fully used for doing work, can effectively recover vibration energy, has better shock absorbing effect than the existing shock absorber, and also prolongs the service life of the generator.
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