Problems needing attention in oil cylinder assembly of workover rig
Release time:
2020-04-25
What should be paid attention to in the assembly of the workover rig cylinder? Today,Wanglian MachineryThe editor will introduce to you what needs attention in the assembly of the cylinder of the workover rig.6A question:
12. All parts shall be cleaned before assembly and dried before assembly. The parts that need fastening glue should be cleaned with special cleaning agent or replaced with acetone. The initial curing time of the fastening adhesive is generally20min, should be in20minTighten the parts to the required torque.
2All sliding parts shall be lubricated with proper amount of hydraulic oil during assembly. The larger size of the fine thread with the parts in the assembly can be smeared with appropriate amount of butter.
3The sealing devices of the cylinder of the workover rig shall be installed correctly. InstallationOWhen forming the ring, do not pull it to the degree of deformation, otherwise it may cause oil leakage. InstallationYshape,VWhen installing the ring seal and the ladder seal, pay attention to the installation direction to prevent oil leakage due to installation. YesYFor the ring seal, its lip responds to the pressurized oil chamber; in addition,YThe sealing ring should also pay attention to distinguish whether it is for shaft or hole, and do not install it incorrectly.
4. Some piston seals are expanded after being installed in the piston seal groove, and are easy to be cut when assembled with the cylinder barrel. A tapered tightening sleeve should be used to tighten the seals. In general, its taper is30°, the small head size is the size of the inner wall of the cylinder. After the piston and piston rod are assembled, they must try to measure whether their coaxiality and straightness over the entire length are out of tolerance.
5The bolts and locknuts of the pressure bearing parts of the cylinder of the workover rig are disposable and cannot be reused. The pressure bearing parts shall not be replaced at will, and the original products shall be used. If not, the corresponding product should be replaced according to its pressure. For example, locknuts, fastening bolts, etc. Most of the fixed or connecting bolts of each component have tightening torque and tightening sequence requirements, and some also specify the tightening angle. Therefore, special wrench or torque wrench should be used to tighten the tightening according to the required torque.
6After the maintenance and assembly of the cylinder of the workover rig is completed, the pressure leakage test must be done before it can be put into use again. The cylinder of workover rig with hydraulic lock shall not be equipped with hydraulic lock during pressure leak test. During the test, the oil cylinder of the workover rig should first move back and forth several times at low pressure to discharge the air in the cylinder, and pay attention to whether the piston assembly moves with any blockage and uneven resistance. During pressure test, increase the pressure slowly and observe carefully whether there is leakage.
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