What is the definition of plunger cylinders?
The plunger cylinder is a single-acting hydraulic cylinder, which can only move in one direction by hydraulic pressure, and the return stroke of the plunger depends on other external forces or the self-weight of the plunger.
The diameter of the plunger rod is relatively thick, generally not much smaller than the cylinder bore. For example, the bore of a 125 mm plunger can reach 120 mm, or the bore diameter is the same sa the rod diameter. For example, a 400 mm piston rod may have a 400 mm bore.
When the plunger cylinder moves, it is guided by the guide sleeve on the cylinder head, so the inner wall of the cylinder does not need to be finished. It is especially suitable for occasions with long strokes.
The structure of the plunger cylinders:
1. The plunger cylinder is a single-acting hydraulic cylinder, which can only move in one direction by hydraulic pressure, and the return stroke of the plunger depends on other external forces or the self-weight of the plunger;
2. The plunger is only supported by the cylinder sleeves and does not contact the cylinder barrel, so the cylinder barrel is very easy to process, so it is suitable for long-stroke hydraulic cylinders;
3. The plunger is always under pressure when working, so it must have sufficient rigidity;
4. The weight of the plunger is often large, and it is easy to sag due to its own weight when it is placed horizontally, causing unilateral wear of the seal and guide, so it is more beneficial to use it vertically.
The working principle of the plunger cylinders:
The plunger hydraulic cylinder can only move in one direction, and the return stroke is driven by gravity or spring force or other forces. In order to get two-way motion, they are usually used in pairs. The plunger is guided by the guide sleeve on the cylinder head, and the plunger is not connected with the cylinder body, so the inner wall of the cylinder does not need to be finished.
The end of the plunger is under pressure. In order to ensure sufficient thrust and stability of the plunger cylinder, the plunger is generally thicker and heavier. It is prone to unilateral wear when installed horizontally, so the plunger cylinder should be installed vertically. When installed horizontally, in order to reduce weight and improve stability, the plunger is made of seamless steel pipe.
How does JW design the plunger cylinders?
Plunger cylinders are often used in presses, forklifts, lifting platforms, etc.
When designing a plunger cylinder, JW generally considers the following three aspects:
1. Function, size of plunger cylinder and selection of seal.
2. Applicability, the installation method and structural decomposition of the plunger cylinder.
3. Production technology, fully optimize the processing technology and control the production cost.
JW customizes professional plunger cylinder solutions for customers in different industries, and provides plunger cylinders with stable quality and competitive price.