What Is a Synchronous Hydraulic Lifting System?

I once watched a heavy structure rise unevenly because several lifting points moved at different speeds. The load shifted, and every person nearby had to stop.

When I explain this system to project teams, I compare it with many people lifting one heavy table together. If one person lifts too quickly, the table becomes unstable. If everyone follows the same command, the table moves smoothly. A synchronous hydraulic lifting system works in the same way, but it uses sensors, hydraulic cylinders, pumps, and computer controls. This combination gives the project team better safety, better control, and better records. In my experience, these three points decide whether a heavy lifting project remains simple or becomes a serious engineering problem.

How Does a Synchronous Hydraulic Lifting System Keep Heavy Loads Level?

I see level control as the most important feature of a synchronous hydraulic lifting system. A heavy structure may use several hydraulic cylinders at different points. Each cylinder carries part of the total weight. If one cylinder moves faster than the others, the structure can tilt, twist, or slide. This movement can damage the load and create danger for workers.

A synchronous system solves this problem by measuring and controlling every lifting point during the whole operation.

I use sensors to measure each lifting point

I connect displacement sensors and pressure sensors to the hydraulic system. The displacement sensors show how far each cylinder has moved. The pressure sensors show how much force each cylinder is carrying. The control system receives this information in real time.

I can then compare the actual movement of each point with the planned movement. If one point rises too quickly, the computer reduces its flow. If another point moves too slowly, the computer increases its flow. The system keeps making small corrections during the lift.

I control movement through a central console

I do not ask several operators to control each jack by shouting instructions across a busy work area. I use one central control console instead. The operator can set the lifting height, speed, pressure limits, and stopping points from the console.

I usually set a very small allowable height difference between the lifting points. In many projects, the control target can keep the difference within about one millimeter, depending on the equipment, load, and site conditions. I still treat this value as a project setting, not as a universal promise. The engineering team must confirm the correct tolerance before each lift.

This control method gives me a clear view of the operation. I can see whether the load is stable, whether the pressure is balanced, and whether any point needs attention. I do not need to wait until a visible tilt appears. I can respond to the data before the problem becomes serious.

Why Does Synchronous Lifting Improve Safety and Project Control?

I consider safety the main reason to use synchronous lifting. Traditional multi-point lifting can depend too much on manual coordination. Several operators may work at the same time, but small differences in timing can create large differences in load position. A few millimeters at one point can become a dangerous angle across a long bridge, steel structure, or building section.

A synchronous system gives me a better way to control this risk. It does not remove the need for engineering planning or trained workers. It adds a control layer that helps the team follow the plan with greater accuracy.

I reduce the risk of uneven loading

I pay close attention to uneven loading because every structure reacts differently. A bridge may transfer force through several supports. A large steel frame may have weak points that cannot accept sudden stress. An old building may have materials that have changed over time.

I use pressure readings to watch how the load moves through the lifting points. If one point carries more force than expected, I can pause the operation and check the structure. I can also change the lifting sequence or adjust the hydraulic settings after the engineering team reviews the data.

I reduce manual work and shorten the lifting period

I also save time because one trained operator can manage the main lifting process from the control console. The operator does not need to stand beside every jack with a measuring tool. Workers can focus on inspection, communication, exclusion zones, and other safety tasks.

I do not describe this process as fully automatic in every situation. The project still needs a qualified lifting plan, site supervision, emergency procedures, and inspection before and during the lift. The computer controls the equipment, but people remain responsible for decisions. I use automation to support professional judgment, not to replace it.

I also value the shorter work period. A shorter lifting operation can reduce exposure to weather, traffic, vibration, and other site conditions. It can reduce the time that a bridge, vessel, or steel structure remains in a temporary position. This benefit can improve both project safety and project scheduling.

Which Projects Benefit Most from Synchronous Hydraulic Lifting?

I recommend synchronous hydraulic lifting when a project involves a heavy load, several lifting points, limited space, or a structure that cannot accept uneven force. I do not choose the system only because the load is large. I also study the shape of the load, the location of the supports, the required lifting height, and the consequences of movement.

I protect structures that need balanced force

I use synchronous lifting for bridge replacement, bridge maintenance, and bridge launching work. I also see strong value in large steel structures, offshore equipment, power plant components, heavy machinery, and oversized transport operations. Historic buildings and old structures can also benefit because uncontrolled local force may create cracks or permanent deformation.

I first identify the lifting points and the expected load at each point. Then I review the structure, the foundation, the hydraulic cylinders, the control system, and the emergency support plan. I use this information to define a safe lifting sequence.

I create a clear record of the whole operation

I value data records because a lifting project does not end when the load reaches its final position. The owner, contractor, engineer, or supervisor may need to review the operation later. They may need to confirm that the lifting height, pressure, and movement stayed within the approved range.

The control system can record key information during the lift.

I use these records to support a more complete inspection report. I can show how the load moved instead of relying only on written statements or photographs. This approach also helps me find lessons for future projects.

At KIET Hydraulics, I view the system as more than a group of hydraulic cylinders. I see it as a complete lifting solution that joins equipment, control software, engineering planning, site support, and service. My team supports contractors, heavy equipment manufacturers, and maintenance providers in bridge construction, marine engineering, oversized transport, energy, and building projects.

I believe the best system is the one that matches the real conditions of the project. A large lifting capacity alone does not guarantee a safe result. I need accurate calculations, suitable cylinders, stable foundations, trained operators, clear communication, and reliable control data. When these parts work together, I can lift heavy structures with greater stability and confidence.

Conclusion

I use synchronous hydraulic lifting systems to move heavy structures safely, evenly, and accurately while reducing manual work, protecting the load, and creating reliable project records.