How to choose a cylinder buffer, the function and working principle of a cylinder buffer

Buffer cylinders are mainly divided into those with built-in buffers and those with external buffers installed. No matter which type, they can be called buffer cylinders. Any type of cylinder with a buffer can be called a buffer cylinder. No restrictions on specifications or types. Cylinders with buffers can greatly extend the life of high-speed operating cylinders, reduce noise pollution to the environment, and ensure the safety and stability of operating conditions.





How to choose cylinder buffer


1. It is necessary to calculate the absorbed energy of the hydraulic buffer according to the impact mode of the load.


2. Calculate the equivalent mass of the impact object. The equivalent mass is the equivalent mass when all the energy of the impact object is converted into kinetic energy.
3. According to the speed and equivalent mass of the impact object, check the component selection chart to select the appropriate hydraulic buffer.
4. Confirm that the absorption stroke, impact speed, frequency of use, temperature range, and maximum allowable thrust are all within the performance range of the selected hydraulic buffer.








The function of cylinder buffer


The rapidly moving cylinder piston rod will produce a large impact force at the end of the stroke. When the buffering capacity inside the cylinder is insufficient, an external hydraulic buffer should be installed. Used to absorb impact energy and reduce mechanical impact noise.
Types of external buffers: multi-hole hydraulic buffers, adjustable single-hole hydraulic buffers, self-adjusting hydraulic buffers.






How the cylinder buffer works


When the hydraulic buffer is subject to collision pressure, the kinetic energy is transferred to the piston through the plug head and acceleration spring, causing it to move to the right. It turns out that the working chamber of the buffer is equipped with a return spring, ejector pin and oil. When the moving object hits the end of the piston rod, the piston moves to the right. Due to the throttling effect of the small hole on the inner cylinder, when the oil passes through the annular throttle hole, a vortex will be formed due to the sudden reduction in the active cross-sectional area, causing the particles in the liquid to pull and rub against each other, converting kinetic energy into heat and dissipating it. falls, thus consuming the kinetic energy of the cylinder and causing the cylinder to stop slowly.





Generally speaking, today's rodless air rods generally have a built-in air buffer of about 10mm. This is to avoid the inevitable inertial motion of the piston when the piston moves back and forth due to the thrust of air pressure when the cylinder is working, and to protect the end cover through air buffering to prevent the end cover from being directly and quickly collided with the piston. Usually many people think that the cylinder itself has air buffering, so there is no need for additional buffering devices, which saves costs. In fact, this idea is wrong.





The air buffer of the cylinder mainly relies on gas, and the force of the buffer is relatively small. When the workpiece is loaded and the cylinder runs at a high speed, the effect of the air buffer is limited and cannot protect the cylinder, which may cause damage to the cylinder. The loss will reduce its service life. At this time, a hydraulic buffer must be installed to protect the mechanical equipment. Otherwise, the cost caused by damage to the cylinder will significantly increase the cost.

Cylinder buffering occurs inside the rodless cylinder, while the workpiece runs outside. Therefore, impact noise is inevitably produced when the workpiece comes into contact with the cross-section of the mechanical equipment. At this time, the air buffering cannot absorb this external noise. to any effect, so an external hydraulic buffer should be installed to reduce noise and protect equipment, thereby improving the company's production efficiency and saving costs.






The above is how to choose a cylinder buffer, and an introduction to the function and working principle of the cylinder buffer. If you want to know more relevant information, please log in to Sunway Pneumatic www.diancifa.cc.