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Denison Hydraulics is a publicly traded U.S.-based company (Stock Symbol:DENHY) that manufactures industrial hydraulic fluid power systems (hydraulic pumps, motors, valves and engineered systems [1]) and components and is headquartered in Marysville, Ohio. Denison is owned by Parker Hannifin.
A hydraulic cylinder is the actuator or "motor" side of this system. The "generator" side of the hydraulic system is the hydraulic pump which delivers a fixed or regulated flow of oil to the hydraulic cylinder, to move the piston. There are three types of pump widely used: hydraulic hand pump, hydraulic air pump, and hydraulic electric pump.
A fluid power system has a pump driven by a prime mover (such as an electric motor or internal combustion engine) that converts mechanical energy into fluid energy, Pressurized fluid is controlled and directed by valves into an actuator device such as a hydraulic cylinder or pneumatic cylinder, to provide linear motion, or a hydraulic motor or pneumatic motor, to provide rotary motion or torque.
However, many hydraulic pumps cannot be used as hydraulic motors because they cannot be backdriven. Also, a hydraulic motor is usually designed for working pressure at both sides of the motor, whereas most hydraulic pumps rely on low pressure provided from the reservoir at the input side and would leak fluid when abused as a motor. [1]
Linde Hydraulics is a manufacturer of heavy duty drive systems consisting of hydraulics, power transmissions, and electronics. The company's product offerings include hydraulic pumps and motors, directional control valves , power transmissions as well as peripheral electronics and software .
Their range includes products for mobile and industrial hydraulics, elevator hydraulics, hydraulic drives for high-voltage switches and height-adjustable workbenches. Some of the many components produced include hydraulic pumps, hydraulic motors, valves, cylinders, power units, electronic devices and associated systems. [1]
A fluid coupling consists of three components, plus the hydraulic fluid: The housing, also known as the shell [5] (which must have an oil-tight seal around the drive shafts), contains the fluid and turbines. Two turbines (fanlike components): One connected to the input shaft; known as the pump or impeller, [5] or primary wheel input turbine. [5]
Cutaway side-view diagram of an axial piston pump 3-D rendering of an axial piston pump with the parts labeled Animation of an axial piston pump in operation. An axial piston pump has a number of pistons (usually an odd number) arranged in a circular array within a housing which is commonly referred to as a cylinder block, rotor or barrel.