CKD cylinder notes introduction

CKD cylinder precautions
CE2 stroke readout cylinder (with brake type)

CKD cylinder, CKD solenoid valve, CKD filter, CKD explosion-proof valve, CKD pneumatic components | Shanghai CKD product

1. The condition of the cylinder during the operation is very complicated. In addition to the static pressure of the gas inside and outside the cylinder and the weight of each component installed therein, it is also subject to the reaction force of the static part when the steam flows out of the vane. And the force of the various connected pipes in the hot and cold state of the cylinder, under the interaction of these forces, the cylinder is prone to plastic deformation and leakage.
2. The load increase and decrease of the cylinder is too fast, especially the rapid start, stop and the change of the working condition, the temperature change is large, the way of the warm cylinder is not correct, the insulation layer is opened too early during the maintenance, etc., in the cylinder and on the flange Produces great thermal stress and thermal deformation.

CKD cylinder, CKD solenoid valve, CKD filter, CKD explosion-proof valve, CKD pneumatic components | Shanghai CKD product

3. The quality of the cylinder sealant used is not good, the impurities are too much or the model is wrong; if there are hard impurity particles in the cylinder sealant, the sealing surface is difficult to be tightly combined.
4. The order of cylinder bolt tightening is incorrect. Generally, the cylinder bolts are fastened from the middle to the two sides when tightening, that is, from the maximum point or the place where the force is deformed the most, so that the gap at the maximum deformation is directed to the free end of the cylinder. Transfer, the final gap gradually disappears. If it is tight from the two sides to the middle, the gap will be concentrated in the middle, and the cylinder joint surface will form a bow-shaped gap, causing steam leakage.

CKD cylinder, CKD solenoid valve, CKD filter, CKD explosion-proof valve, CKD pneumatic components | Shanghai CKD product

5. The clamping force of the cylinder bolt is insufficient or the material of the bolt is unqualified. The tightness of the cylinder joint surface is mainly achieved by the tightening force of the bolt. The thermal stress and high temperature generated when the unit starts or stops or increases or decreases the load will cause the stress relaxation of the bolt. If the stress is insufficient, the pre-tightening force of the bolt will gradually decrease. If the bolt material of the cylinder is not good, the bolt will be elongated under the action of thermal stress and cylinder expansion force during long-term operation, plastic deformation or fracture will occur, and the tightening force will be insufficient, causing the cylinder to leak.
6. The cylinder is cast, and the cylinder is subjected to aging treatment after leaving the factory, so that the internal stress generated by the cylinder during the casting process is completely eliminated. If the aging time is short, the machined cylinder will be deformed in the future.

CKD cylinder, CKD solenoid valve, CKD filter, CKD explosion-proof valve, CKD pneumatic components | Shanghai CKD product

7. The cylinder generates stress during the machining process or after repair welding, but the cylinder is not tempered to eliminate the cylinder, resulting in large residual stress in the cylinder and permanent deformation during operation.
8. During the installation or overhaul process, due to the maintenance process and maintenance technology, the expansion gap of the inner cylinder, the cylinder partition, the diaphragm sleeve and the steam jacket is not suitable, or the expansion gap of the hanger pressure plate is not suitable. After the operation, a large expansion force is generated to deform the cylinder.

CKD cylinder, CKD solenoid valve, CKD filter, CKD explosion-proof valve, CKD pneumatic components | Shanghai CKD product

The CKD cylinder and the hydraulic cylinder are skillfully combined to complement each other, which becomes the gas-liquid damping cylinder commonly used in pneumatic systems. The working principle of the gas-liquid damping cylinder is shown in Figure 42.2-5. Actually, the cylinder is connected in series with the hydraulic cylinder, and the two pistons are fixed on the same piston rod. The hydraulic cylinder does not need to be supplied with oil by the pump. As long as it is filled with oil, the hydraulic inlet check valve, throttle valve and oil filling cup are installed in the inlet and outlet. When the right end of the cylinder is supplied with air, the cylinder overcomes the load to drive the piston of the hydraulic cylinder to move to the left (the left end of the cylinder is exhausted). At this time, the left end of the hydraulic cylinder is drained, the check valve is closed, and the oil can only flow into the right chamber of the hydraulic cylinder through the throttle valve and In the oil cup, if the throttle valve opening is opened at this time, the left cylinder of the hydraulic cylinder is drained smoothly, and the speed of the two pistons is fast. On the contrary, if the throttle valve port is closed, the left cylinder of the hydraulic cylinder is drained. Blocked, the speed of the two pistons will slow down. In this way, by adjusting the size of the throttle opening, the speed of movement of the piston can be controlled. It can be seen that the output force of the gas-liquid damping cylinder should be the difference between the force (thrust or tension) generated by the compressed air in the cylinder and the damping force of the oil in the hydraulic cylinder.
PV5-8R-FG-S-A03-TC
PV5-8R-FG-S-TC
PV5-8R-FHG-D-TC
PV5G-6-FG-D-1
PV5G-6-FG-D-3
PV5G-6-FG-D-3-N
PV5G-6-FG-D-3-N-A03
PV5G-6-FG-S-1-N
PV5G-6-FG-S-3
PV5G-6-FG-S-3-N
PV5G-6-FG-S-3-N-A03
PV5G-6-FHG-D-3
PV5G-6-FIG-D-3-N-A03
PV5G-6-FJG-D-3-N
PV5G-6-FPG-D-3-N
PV5G-8-FG-D-3
PV5G-8-FG-D-3-N
PV5G-8-FG-S-1
PV5G-8-FG-S-1-N
PV5G-8-FG-S-3
PV5G-8-FG-S-3-N
PV5G-8-FG-S-3-N-A03
QEV2-10
QEV2-15
QEV2-20
QEV2-25
QEV2-6
RA800-6-PN
RA800-8-L
RA800-8-P
RB500-LLC4
RB500-SSC4
RB500-SSC6-P
RCC2-00-50-70-R
RP1000-8-07
RP2000-10-08
RP2000-10-08-G49P
RP2000-8-08
RP2000-8-08-BE
RP2000-8-08-G49P
RP2000-8-08-G49PBE
SCPD2-00-16-15
SCPD2-00-16-20
SCPD2-CB-10-15
SCPD2-CB-16-30
SCPD2-CB-16-45
SCPD2-K-00-16-50
SCPD2-KL-CB-16-160
SCPD2-L-00-10-45
SCPD2-L-00-16-100
SCPD2-L-00-16-125-M3V3-R
SCPD2-LS-16-15
SCPD2-M-00-10-30
SCPD2-M0V-16
SCPH2-00-6-8
SCPS2-00-16-30