How Plain Sliding Bearing Helps Hydraulic Gear Pumps Achieve High Performance

Reducing Friction and Wear

The primary function of plain sliding bearings in hydraulic gear pumps is to reduce friction between the moving parts, specifically between the rotating gear shafts and the pump housing. In hydraulic systems, friction is a significant concern because it generates heat and can lead to wear over time, reducing the pump’s overall efficiency.

The friction factor plays a significant role in the longevity of a bearing. We have a bearing life calculator that can help you estimate the expected lifespan of your bearings based on various operational factors. This information can be invaluable for planning optimal equipment performance and minimizing maintenance and replacement schedules.

Supporting Heavy Loads

Hydraulic gear pumps operate under high-pressure conditions, which means the gears and shafts within the pump are subjected to substantial mechanical loads. Plain sliding bearings are designed to handle heavy loads, distributing the force evenly across their surface. This capability prevents localized stress points, reducing the likelihood of component failure or wear.

Unlike ball or roller bearings, which can suffer from fatigue under constant high loads, plain sliding bearings can maintain their performance over prolonged periods, making them ideal for use in demanding hydraulic systems. This characteristic also helps extend the lifespan of the hydraulic gear pump by minimizing the wear and tear that can occur from continuous operation.

Handling High Temperatures

Hydraulic gear pumps generate significant heat due to the high-pressure movement of fluid and the friction between moving components. Bearings in such systems must be capable of withstanding high temperatures without losing their performance or structural integrity.

Plain sliding bearings, particularly those made from bronze, PTFE, or other high-temperature-resistant materials, are designed to operate under these extreme conditions. Their ability to handle high heat is essential for maintaining the pump’s efficiency, especially in systems that operate continuously or under heavy loads.

Minimizing Maintenance Requirements

In hydraulic gear pumps, reducing the need for frequent maintenance is crucial for minimizing downtime and maximizing productivity. Plain sliding bearings are often self-lubricating, which eliminates the need for continuous lubrication. Materials such as PTFE are inherently low-friction and can provide lubrication over the bearing’s lifespan. This not only reduces maintenance requirements but also extends the overall lifespan of the bearing and the pump.

The simplicity of plain sliding bearings also means that they are less prone to mechanical failure compared to more complex bearing types. With fewer moving parts and lower maintenance demands, plain bearings offer a cost-effective solution for long-term hydraulic system performance.

Gear Shaft Support

In hydraulic gear pumps, the rotating gear shafts need to be precisely aligned and supported to maintain efficient fluid flow. Plain sliding bearings provide the necessary support for these shafts, allowing them to rotate freely without excessive friction. By minimizing contact between the gear shafts and the housing, the bearings help reduce wear and maintain pump efficiency.

Reducing Gear Meshing Noise

Hydraulic gear pumps often generate noise due to the meshing of gears and the high-speed rotation of the shafts. Plain sliding bearings help to dampen vibrations and reduce the noise associated with gear meshing, leading to quieter operation. This is particularly important in industrial and mobile machinery, where noise reduction contributes to improved operator comfort and compliance with noise regulations.

Managing Side Loads

Side loads are common in hydraulic gear pumps due to the movement of fluid under pressure. Plain sliding bearings are well-suited to handle side loads by evenly distributing the force across their surface area. This prevents wear on individual components and ensures the smooth operation of the pump, even under varying load conditions.

Sealing and Lubrication Efficiency

In some hydraulic gear pumps, plain sliding bearings are also used as sealing elements, helping to prevent fluid leaks and maintain pressure within the system. Their low-friction properties ensure that the pump operates efficiently, while the bearings' ability to retain lubrication minimizes the need for external lubrication systems.