This article mainly introduces:

Denmark hydraulic cylinder,pushing cylinder manufacturer,pushing cylinder

(Denmark pushing cylinder,produced by Hebei Hengyu company）

pushing cylinder are widely used in Denmark，because of simple structure and reliable operation，excellent temperature resistance，no transmission clearance.So our company has designed pushing cylinder for customers from Denmark.

Introduction to pushing cylinder:

How to repair the pushing cylinder body when it is damaged: When the pushing cylinder has trace deformation and shallow tensile marks, the pushing cylinder is repaired by strong honing process. The heavy honing process can repair pushing cylinders up to 2.5 times out of tolerance than the original tolerance. It honed the parts with excessive size or shape error through a powerful honing machine, so that the overall size, shape tolerance and roughness of the pushing cylinder can meet the technical requirements.

The machining accuracy of the pushing cylinder depends on the level of equipment, production technology and testing means. pushing cylinder processing methods are commonly used in two ways, one is rough boring - fine boring - rolling, generally with 45# seamless steel pipe, this method of processing quality is good, but the cost is high. Another method is to use 20# cold-drawn seamless steel pipe, and then honing, the cost is lower. The piston rod must be adjusted and straightened before processing, and the coating thickness of the piston rod is generally not less than 0.03mm. The piston must be machined in strict accordance with the groove size and tolerance requirements given in the seal manual.

Causes and countermeasures of oil pushing cylinder leakage: Cast iron ring seal allows a certain degree of internal leakage. The impurities in the pushing cylinder will lead to premature wear of the piston seal, replace the piston seal; If the pushing cylinder is visibly scarred, the pushing cylinder must be replaced. It can be pressurized at one end of the pushing cylinder and opened at the other end of the oil port to observe whether there is obvious internal leakage at the end of the oil port. Most pushing cylinder piston drift may not come from the pushing cylinder, the above method to determine the pushing cylinder without internal leakage is helpful to determine the problem of the hydraulic system related components.

pushing cylinder seal leakage causes and countermeasures: a. Loose tie rod nut will cause leakage, tighten the tie rod nut according to the torque requirements of tie rod nut, test no leakage can continue to use. b. Pressure exceeding the limit will also cause leakage. Replace the pushing cylinder seal and re-tighten the tie rod nut to reduce the pressure to the nominal pressure range of the pushing cylinder. c. The pushing cylinder seal is extruded, if the O-ring is obviously extruded at the pushing cylinder seal, replace the pushing cylinder seal.

Answers to some questions about pushing cylinder:

When does the cylinder rotate?
The piston rod inside the multistage plunger cylinder can be rotated, and it will rotate when it is subjected to tangential force.

How to select the propulsion cylinder according to the shield attitude, cylinder stroke, shield tail clearance and other factors?
Generally, the shield machine will be equipped with the corresponding cylinder. Soil pressure balancing machine, mud water balancing machine have the corresponding cylinder, there will be no insufficient cylinder force. In the jacking process of the pipe jacking machine, there are certain requirements for the jacking force of the cylinder.