How Do Hydraulic Floor Lifts Work?

Hydraulic lifts help lift heavy objects.

Hydraulic systems provide a substantial amount of power that would not otherwise be possible in manual labor alone. Floor lifts are convenient for workers who otherwise would need to awkwardly bend, stretch or squeeze around objects they work on.

Fluids

Depending on the level of hydraulic pressurization needed, any non-compressible fluid can be used for hydraulics, including air. Air is effective in small systems, but can leak more than desired when pressure changes. Thus, oil and specialized hydraulic fluid are more appropriate for larger systems.

Pressurization

Enclosed systems have reservoirs holding the fluid intended for pressurization. When pressure is needed to raise the floor lift, fluid is pumped manually or electrically into the system. Once the desired height of the lift is achieved, pressure is either manually locked in place by a brake, or electrical motors are run as needed to maintain the desired level of pressure. When the brake is released, pressure is relieved, allowing fluid to drain back into the reservoir until the desired level is reached.

Dangers

Hydraulic systems are dependent on a sealed system to ensure reliability. Small leaks are detrimental to safe operation and could quickly develop into large, disastrous hydraulic leaks. Hydraulic brakes should always have a backup system in the event of failure, especially when people are working under heavy equipment being lifted.

References

• Engine Mechanics: Principles of Hydraulic Pressure
• IQS Directory: Hydraulic Lifts Companies