What is the difference between cylinder bearing and sliding bearings?

cylinder bearing work under sliding friction. The sliding bearing works smoothly, reliably and without noise. Under liquid lubrication conditions, the sliding surface is separated by lubricating oil without direct contact, and friction loss and surface wear can be greatly reduced. The oil film also has a certain vibration absorption capacity. But the starting frictional resistance is relatively large. The part of the shaft that is supported by the bearing is called the journal, and the part that matches the journal is called the bearing bush. In order to improve the friction properties of the bearing pad surface, the anti-friction material layer cast on the inner surface is called the bearing liner. The materials of bearing bushes and bearing linings are collectively referred to as sliding bearing materials. Sliding bearing applications are generally under high-speed and light-load conditions.

The working principle of the cylinder: A set of high-strength magnetic magnetic rings is installed on the piston. The magnetic field lines act on the other set of magnetic rings inside the outer slider through the thin-walled cylinder barrel. Because the two sets of magnetic rings have opposite magnetic properties, they have a strong mutual suction. When the piston is pushed by air pressure in the cylinder, the piston moves. At the same time as the piston moves, the magnetic ring in the outer slider is affected by the magnetic force lines of the magnetic ring on the piston and moves synchronously. The thrust of the cylinder piston must be compatible with the suction of the inner and outer magnetic rings. When the air pressure is too high or the load is too heavy, resulting in excessive piston thrust and the attractive force between the magnetic rings cannot be maintained, the inner and outer magnetic rings will disengage. The cylinder is working abnormally, and the term is called off-target.

Features of cylinder bearing
1. Compared with the standard cylinder, the cylinder has the following characteristics:
The overall installation size of the cylinder is small, and the axial space is small, which saves about 44% of the axial space compared with the standard cylinder. The area of ​​the piston at both ends of the magnetic coupling rodless cylinder is equal in thrust and pulling force, so the thrust and pulling force are equal in value, and it is easy to realize intermediate positioning. When the piston speed is 250mm/s, the positioning accuracy can reach ±1.0mm. The surface of the piston rod of the standard cylinder is easy to accumulate dust and rust, and the rod sealing ring may inhale dust and impurities, causing leakage. However, the outer slider of the magnetic coupling rodless cylinder does not have a moving seal, and there is no external leakage.

2. Comparison of cylinder and mechanical rodless cylinder:
The magnetic coupling type has a small appearance, with installation threads and nuts on both ends, which can be directly installed on the equipment. The magnetic coupling type cylinder has a relatively small load, which is suitable for loading small workpieces or manipulators to move.
When the basic magnetic coupling type moves back and forth, the slider may rotate. A guide rod guide device must be added, or a rodless cylinder with a guide rod type magnetic coupling may be used.

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