What is the disadvantage of using a double-acting cylinder?

What is the disadvantage of using a double-acting cylinder?

When it comes to hydraulic cylinders, there are various types, and each has its usage. One of such types of cylinders is the double-acting cylinder. Double-acting cylinders are common in many industrial fields. They are designed to provide hydraulic power in both extending and retracting strokes. However, despite their widespread use, double-acting cylinders have their disadvantages. In this article, we will explore these disadvantages and how to prevent them.

What is a double-acting cylinder?

A double-acting cylinder is a hydraulic cylinder that is designed to operate in both directions. This type of cylinder has a rod extending from both ends, allowing it to generate force on both compression and tension. In other words, double-acting cylinders can generate force in both extending and retracting modes.

Disadvantages of using a double-acting cylinder

1. High cost

One of the main disadvantages of using a double-acting cylinder is its high cost. Double-acting cylinders require more complex components, such as two ports, which make it more expensive to manufacture. Besides, due to its higher complexity, it requires more maintenance, adding to the cost. For small applications, having a double-acting cylinder may be an overkill, and a single-acting cylinder may suffice.

2. Lower efficiency

Double-acting cylinders have a lower efficiency compared to single-acting cylinders. During the extension stroke, the hydraulic fluid has a greater resistance to flow, causing it to slow down. During the retraction stroke, the fluid’s resistance to flow is lower, causing it to move faster. As such, during the retraction stroke, the cylinder requires less energy. The result is unequal energy distribution during the two strokes, which leads to lower efficiency compared to single-acting cylinders.

3. More complex installation

Double-acting cylinders require more complex installation compared to single-acting cylinders. They require more plumbing connections, including two ports, which may cause challenges in compatibility with the hydraulic system. Besides, installation requires other components such as valves, which require expert installation to prevent leakage.

4. Higher maintenance

As mentioned earlier, double-acting cylinders have more complex components, and therefore require more maintenance compared to single-acting cylinders. They are more prone to leakage, and require periodic maintenance to prevent wear and tear on the cylinder seals. Maintenance can be costly and time-consuming, especially in cases where the cylinder’s internal components require access, such as in the case of cylinder disassembly.

5. Restricted applications

Double-acting cylinders may not be suitable for all applications. They are typically used in applications where a higher level of control is required, such as in the control of large valves. However, in cases where the application does not require control in both directions, a single-acting cylinder may be a better option.

Prevention measures

1. Proper maintenance

Proper maintenance can help prevent most of the problems associated with double-acting cylinders. It is essential to follow manufacturer recommendations when it comes to maintenance. Conduct regular servicing and inspection of the cylinder to ensure that its seals are in good condition, and the hydraulic fluid is at the right level and quality.

2. Installation by an expert

Double-acting cylinders require more complex installation, and therefore require an expert to avoid leakage. Employing an expert for cylinder installation ensures that the system is working optimally, and prevents damage to the hydraulic system. Experts also provide advice on the best lubrication and protection method for the hydraulic system.

3. Matching the cylinder with the application

Matching the cylinder with the right application ensures that the cylinder is not overused or underutilized. As such, it is essential to determine the right kind of cylinder for the application before making any purchase. In this case, it is essential to consider factors such as extension and retraction force, stroke length, and mounting style, among others.

4. Proper sizing and selection

Proper sizing and selection of the cylinder are essential for ensuring optimal performance of the system. If the cylinder is oversized, it can result in higher operational costs. On the other hand, undersizing the cylinder can lead to cylinder failure, compromising the efficiency of the system.

5. Purchase from a reputable manufacturer

Purchasing a double-acting cylinder from a reputable manufacturer ensures that the product is of high quality and is designed to last. Reputable manufacturers offer warranties, expert advice, and guidelines to help customers optimize the system.

Conclusion

In conclusion, double-acting cylinders are common in many industrial fields and provide hydraulic power in both extending and retracting strokes. However, they have their disadvantages, including high cost, lower efficiency, more complex installation, and higher maintenance. It is essential to take the necessary measures to prevent these problems, including proper maintenance, installation by an expert, proper sizing and selection, proper matching of the cylinder with the application, and purchasing from a reputable manufacturer.