Hydraulic Testing Projects With China National Offshore Oil Corporation

The hydraulic cylinder often has a jumping and stopping movement state during operation, which we call creeping phenomenon. This phenomenon is especially easy to occur at low speed, which is also one of the main faults of hydraulic cylinder.To solve the problem of hydraulic cylinder creep, we must study the cause of this phenomenon. After summarizing, we found that the cause for hydraulic cylinder creep not only have something to do with the hydraulic cylinder itself and also related to other factors outside the cylinder. Let’s talk about it today. Internal causes of hydraulic cylinder creep failure ① There is residual air in the cylinder, and the working medium forms an elastic body. Troubleshooting method: Fully exhaust the air; check whether the diameter of the hydraulic pump suction pipe is too small, and the suction pipe joint should be well sealed to prevent the pump from sucking air. ② The sealing friction is too large. Troubleshooting method: The piston rod and the guide sleeve are matched with H8/f8, and the depth and width of the sealing ring groove are strictly made according to the dimensional tolerance; if a V-shaped sealing ring is used, adjust the sealing friction to a moderate degree. ③ The sliding parts

Project Images Project Introduction 50-ton low height pancake hydraulic cylinders used in auger boring steerable rock system.Steerable head designed for boring through sand or soft rock with real-time steering adjustments made out of the pit with a hydraulic control system. The Steerable Rock System (SRS) is the auger boring market’s first steerable head designed to navigate not only solid rock but difficult fractured rock conditions as well. Engineered to operate in rock up to 25,000 psi, the SRS allows operators to keep bores online and grade even in the toughest ground conditions for an on-grade bore. On the drilling head, there is peace’s of small round pipe, that’s where the cylinders sit. There are 4 pcs 50-ton pancake hydraulic cylinders on each side(top, bottom, right, and left) of the steerable head for a total of 16pcs, it works when it’s drilling horizontally underground we use the cylinders to navigate the drilling head.

Project Images Project Introduction Taizhou Chuanhu Hydraulic Machinery Co., Ltd delivered 6 double-acting hydraulic cylinders and a petrol-driven hydraulic power unit for the skidding and sliding systems. The Power Pack and hydraulic cylinders are used for electric transformer relocation.

RIVERLAKE ZJ9 pile load testing power pack is a plc controlled pile load testing system,which can control,display,record and download the real-time pressure of the cylinders,real-time tonnage of the output force,real-time pressure of the power pack,real-time load testing time.In this project,our ZJ9 power station worked with 9 units HCRL30012 double acting lock nut hydraulic cylinders to generate a Max. total output force of 2700 tons.Beside above features,we can even built in bluetooth load cell and bluetooth dial gauge sensors to our pile load equipment to display and record the real-time load data from load cells and real-time pile displacement data from the dial gauge.