Changzhou Colewell Machinery Co., Ltd.

The damping of gas springs can be preset by using different "damping discs." Furthermore, special "damping" (e.g. end position damping or insertion damping) can be achieved by filling with larger oil quantities. Here, a larger resistance must be overcome to press the oil through the piston than if gas is flowing through the piston.

The general service life of gas springs is between 10,000 and 50,000 double strokes (1x retraction and extension) depending on the type of gas spring. At JUTENG, the service life is tested according to internal test standards. These test standards provide for an optimal installation of gas springs. After the service life tests are completed, only a minimum power loss from escaped gas is tolerated at JUTENG. However, the actual service life of a pneumatic spring in application depends on many factors. That is why gas springs should be tested in the respective application under the actual conditions to be able to make a reliable statement about the service life of the gas spring.

No. So that the gas filling does not escape from the pressure pipe, a hermetic seal of the gas spring interior must be created, even at the moving piston rods. To achieve a hermetic seal, the piston rods and the seal must be in contact with a sufficient surface pressure. The result of the contact of two bodies is always a frictional force. The sealing of JUTENG gas springs is designed so that the piston rods slide on the seal when displaced. The resulting friction is reduced to a minimum in gas springs due to a careful selection of the materials and lubricants used.

Yes. The inner volume of the gas spring is closed to the outside. This means that the filled gas volume can only occupy the free space in the pressure pipe that is not needed for components or oil. By pushing the piston rod in, this free space [V] is reduced by the inserted piston rod volume. Because the same gas volume has a smaller volume available, the pressure [p] in the gas spring increases. This formula applies: p2 = (V1 / V2) x p1 The index [1] corresponds to the piston rod position before moving displacement and index [2] after displacement. The force [F] can also be used for the pressure [p] in this formula due to the correlation of the gas spring force with the filling pressure.

Inside a gas spring, the filling pressure acts on both surfaces of the piston. Once this is firmly bonded with the piston rod, the piston surface on the piston rod side is reduced by the cross-section of the piston rod. This results in a differential pressure on the piston, which acts in the extension direction. The size of the force [F] is equal to the product from the filling pressure [p] and the piston rod cross-section surface [A]. The following formula applies: F = p x A