Hydraulic Systems Review

Flashcards on Hydraulic Systems

Reservoir

Holds oil for the hydraulic system and is essential for maintaining the oil supply.

Pump

Component that flows pressurized oil to the system.

Fixed Displacement Pump

A pump that provides a constant flow.

Variable Displacement Pump

A pump that adjusts flow based on system demand.

Check Ball

Allows forward flow by pushing the ball away from the valve seat and prevents reverse flow by pushing the ball against the valve seat.

Pressure Relief Valve

Releases oil back into the reservoir to relieve excess pressure; it protects the system from overpressure.

Accumulator

Stores pressurized oil for quick changes in the system, providing an immediate oil supply when needed.

Direction Control Valve

Directs the flow of oil within the system, typically using a stem with a spring controlled by solenoids.

Actuator

The cylinder where oil pushes the piston, causing movement; converts hydraulic energy into mechanical motion.

Unidirectional Fixed Displacement Pump

Provides a constant flow of hydraulic fluid in one direction; used in systems where consistent flow is required.

Reversible Fixed Displacement Pump

Provides a constant flow of hydraulic fluid but can operate in both directions; used in systems requiring reversible flow.

Variable Displacement Pump

Adjusts the flow rate based on system demand; used in systems where flow needs to be varied, improving efficiency and performance.

Variable Displacement Pressure Compensated Pump

Adjusts the flow rate and maintains a constant pressure; used in systems requiring precise control over both flow and pressure.

Non-Reversible Motor

Operates in a single direction only; used in systems where only one direction of rotation is needed.

Reversible Motor

Can operate in both directions; used in systems requiring reversible motion.

Bi-Directional Motor Pressure Compensated

Similar to a reversible motor, it can operate in both directions; commonly used in applications needing frequent changes in direction as well as oil pressurized.

Pressure Compensated Motor

Adjusts its operation to maintain a constant pressure; used in systems where maintaining a specific pressure is crucial for performance and safety.

Motor with Drive Shaft

Includes a drive shaft to transmit mechanical energy to the load; used in various machinery where direct mechanical power transmission is needed.

Single-Acting Cylinder

Creates force in one direction only; hydraulic fluid enters through one port, and the return is managed by a spring or external force; commonly used in lifting applications.

Double-Acting Cylinder

Creates force in both directions; hydraulic fluid enters through two ports, allowing the piston to extend and retract; used in applications requiring controlled movement in both directions.

Double Rod-End Cylinder

Features a piston rod extending from both ends of the cylinder; allows for equal force and speed in both directions; ideal for applications needing precise and consistent movement in both directions.

Differential Cylinder

Has different effective areas on each side of the piston, providing different force and speed characteristics depending on the direction of movement; used in applications where varying force and speed are required.

Single Rod End with Fixed Cushion at Both Ends

Features cushioning at both ends to absorb impact and reduce wear; hydraulic fluid enters through one port, with fixed cushions providing smooth deceleration at the end of the stroke; used in applications where smooth and controlled deceleration is important.

Single Rod End with Adjustable Cushion on Rod End Only

Features an adjustable cushion at the rod end to control deceleration; hydraulic fluid enters through one port, with adjustable cushioning allowing for customizable deceleration; used in applications requiring precise control over deceleration at the rod end.

Fixed Restrictor

Provides a constant restriction to fluid flow; used in systems where a consistent flow rate is required.

Adjustable Restrictor

Allows the restriction to be manually adjusted to control the flow rate; used in systems where flow needs to be varied based on operational requirements.

Adjustable Restrictor (Pressure Compensated)

Adjusts the flow restriction while maintaining a constant pressure; used in systems where both flow control and pressure stability are crucial.

Adjustable Restrictor (Pressure & Temperature Compensated)

Adjusts the flow restriction while compensating for both pressure and temperature variations; used in systems where precise control over flow, pressure, and temperature is required.