Advantages of SMART Electro Hydraulic Actuator (SHA)

Advantages of SMART Electro Hydraulic Actuator (SHA)

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The SMART Electro-Hydraulic Actuator (SHA) by Kyntronics offers a plethora of advantages, making it an optimal choice for various industrial applications. This post delves into the unique features, reliability comparisons, cost benefits, and practical applications of the SHA system. It highlights how its innovative design ensures maximum reliability with minimal maintenance requirements, making it a cost-effective, reliable choice in the market.

SHA Product Design Features

Engineered for Reliability and Low Maintenance

Notable Design Elements Include:

• No metal-to-metal wear points
• Rod seal tested to over 50 million inches of travel without failure
• Completely enclosed system to avoid contamination, moisture, and air
• Oversized wear rings and bearings for enhanced rod support
• Servo control to eliminate pressure spikes
• Relief valves to prevent overpressure
• Temperature monitoring to prevent overheating
• Minimal fluid usage: an example being 30 ounces for a 2.0” bore by 3.0” stroke actuator

Reliability Comparison: SHA vs. Ball Screw and Roller Screw Actuators

• EMA life is load-dependent, requiring larger and costlier screws to improve.
• EMAs suffer from metal-to-metal wear, necessitating frequent lubrication.
• Highly susceptible to shock load and side-loading damage.
• SHA offers a robust rating of 50,000,000 inches of travel regardless of load.

Learn more about Kyntronics SHA comparison with Electro-Mechanical Actuators.

Operational Cost Comparison: SHA vs. Traditional Hydraulic Systems

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References:

Several assumptions in the cost table are based on Fluid Power Industry statistics and sources.

Learn more about Kyntronics SHA comparison with Hydraulic Cylinder Actuators.

Understanding Hydraulic Actuators: Functionality and Applications

An actuator is an integral electric component in machinery, responsible for system movement and control. Utilizing energy sources like hydraulic liquid force and control signals like current or voltage, actuators convert this energy into mechanical motion. This discussion focuses specifically on hydraulic actuators, explaining their operational mechanisms and various applications.

What Exactly is a Hydraulic Actuator?

A hydraulic actuator is a device that converts fluid pressure into mechanical movement. The device typically comprises a cylinder or fluid motor driven by hydraulic power, producing rotary, linear, or oscillatory motion. Due to the incompressibility of hydraulic fluid, these actuators can generate significant force.

Hydraulic Actuator Working Principle: Instead of using air pressure, hydraulic actuators use liquid pressure to drive the diaphragm or piston. This mechanism converts the pressurized liquid into mechanical power.

Types of Hydraulic Actuators

Hydraulic actuators come in three primary types based on the nature of their actuation: linear, rotary, and semi-rotary.

• Linear actuators provide force in a straight line. They're often termed hydraulic cylinders.
• Rotary actuators produce rotational motion and are commonly known as hydraulic motors. They offer consistent angular movement.
• Semi-rotary actuators produce partial angular motion, capable of up to 360 degrees or less.

Specifications

Understanding detailed specifications is crucial for effective application. Contact us to discuss your requirements with a Light Positioner Manufacturer. Our experienced team can tailor solutions to fit your needs.

• Supply voltage: 24 V ± 10%
• Battery voltage: 20V to 36V
• Input power: 40 VA max
• Controlled current: 0 to 1.6 A
• Pulse width modulation: 160 Hz
• Primary current: +0.2 to 1.1 A
• Maximum current: 1.6 A
• Input differential: 0 to ± 10V or 0 to ± 20mA
• Ramp time: approx. 1 to 10 seconds at 100% of nominal value
• Operating temperature: -10°C to 70°C
• Connections: 64-pole plug connector, DIN 41612

Hydraulic Actuator System & Its Working

The operation of a hydraulic actuator is rooted in Pascal's Law, stating that applied pressure in a confined fluid is transmitted equally throughout the fluid and its container's walls. Using this principle, hydraulic actuators can generate large forces from relatively small input pressures.

The hydraulic actuator system typically consists of a spool valve or pilot valve and a main cylinder or power cylinder. When pressure difference occurs between the two main cylinder areas, the piston moves, driving the load.

The spool valve manages fluid flow into the cylinder, thereby controlling piston movement. At neutral position, no fluid flows into the cylinder, meaning no load movement. When the spool valve shifts, fluid flows into the main cylinder, creating an unbalanced force that moves the load. This setup allows small valve movements to generate significant load-moving forces.

Hydraulic Actuator Advantages & Disadvantages

Advantages of Hydraulic Actuators:

• Simplistic design
• Cost-effective
• Robust structure
• High force generation
• Protects engine from overload
• Quick mode switch due to rotational parts
• Easy transition from rotational to reciprocating movement
• Generates 25 times more force than comparable pneumatic cylinders
• Operates up to 4,000 psi
• Maintains constant pressure and torque
• Pumps and motors can be located remotely with minimal power loss

Disadvantages of Hydraulic Actuators:

• Inflexibility
• High maintenance requirements
• Temperature sensitivity
• Limited motion control
• Insufficient data collection
• Lower operational efficiency compared to alternatives
• Dependent on operating conditions
• Requires additional components like reservoirs and pumps, leading to noise issues
• Fluid leaks can result in efficiency loss and hygiene issues

Applications

Hydraulic Actuator Applications include:

• High-force operations
• Crane drives, winches, excavators, wheel motors in military vehicles
• Feeder and agitator drives, roll mills, trammels, kilns
• Drum drives, car and tire shredders, drilling rigs
• Hydraulic jacks and brakes
• Precise positioning for heavy loads
• Velocity control in closed-loop systems
• Hydraulic rams
• Serving as sensors in some applications

In summary, hydraulic actuators convert fluid pressure into mechanical motion to perform various tasks. The flowing fluid's pressure drives the piston, generating energy for the piston rod to execute useful work. Curious about more details? What exactly does a hydraulic actuator do? For more information, please visit Light Positioner Supplier.