Image

A New “Spin” on Hydraulics Education

Sept. 4, 2015
This new device brings phys-ed to hydraulics lab.

When learning about hydraulic-system power ratings, students should wear their gym clothes to class. The 1-HumanPower trainer from the Fluid Power Training Institute (FPTI) is a one-speed stationary bike apparatus, built to perform four tasks with various force requirements.  Since students are the primary power source, completion of a task depends on his or her ability to maintain the necessary pedal speed.

As the student pedals, they move a belt drive that drives a fixed displacement pump. Pedaling faster increases fluid flow in the pump. Four solenoid directional-control valves control the actuators to complete four tasks: a double-acting, single-rod boom cylinder lifts and lowers a weight; a double-acting, single-rod boom cylinder extends and retracts the weight; a bidirectional fixed-displacement hydraulic motor drives a winch to lift the weight; and a bidirectional fixed displacement motor enables full crane rotation.

As students perform a specific task, they observe an instrument panel, consisting of an analog flow meter, pressure gauge, and digital tachometer, that indicates pump speed. The 1-HumanPower also comes with an all-digital panel upon request.

While viewing changes in pressure, pump speed, and fluid flow on the instrument panel, students can also observe their pedaling speeds upon use of a heavier weight and in different stages of the operations.  The 1-HumanPower is also designed with different cylinder diameters. As a result, students are able to observe the relationship between cylinder cross-sectional area and pressure while pedaling.  

The trainer’s various features allow students to physically experience the relationship between power ratings and force/pressure requirements.  “Since the student is the prime mover, he or she can literally see how changes in pump speed affect actuator speed and feel how changes in flow and/or pressure affect horsepower; or in this case, human power,”  says Rory McLaren of FRTI.

To find out more about the 1-HumanPower Trainer, call (801) 908-5456 or email [email protected].

About the Author

Leah Scully | Associate Content Producer

Leah Scully is a graduate of The College of New Jersey. She has a BS degree in Biomedical Engineering with a mechanical specialization.  Leah is responsible for Hydraulics & Pneumatics’ news items and product galleries. 

Continue Reading

Jan. 13, 2020
The goal is to match kinetic energy of the press to the work required. It’s seldom quite that simple.
Nov. 21, 2022
Use of hydraulics is best determined by considering the requirements of an application as well as several other factors.