Hydraulic cylinder quality appraisal

hydraulic cylinder is to convert hydraulic energy into linear, swinging and reciprocating mechanical motion. It consists of multiple parts, including but not limited to cylinder barrel and cylinder head, piston and piston rod, sealing device, buffer device and exhaust device. These components work together to enable the hydraulic cylinder to effectively convert hydraulic energy into mechanical energy to drive the movement of various mechanical equipment.
hydraulic cylinder has the advantages of withstanding large pressure, smooth movement, reliable operation, convenient adjustment and long service life. It is widely used in mechanical engineering, aviation, shipbuilding, automobile and other fields, such as CNC machine tools, presses, injection molding machines, etc., as well as construction machinery, mining machinery, metallurgical equipment, etc. Hydraulic cylinders are widely used in various large-scale equipment due to their characteristics of large pressure and large torque.
In the case of hydraulic cylinder quality appraisal, Zhongke Testing can provide hydraulic cylinder quality appraisal services.

hydraulic cylinders have various structures and classification methods:
can be divided into linear reciprocating motion and rotary swing type according to the movement mode;
can be divided into single-acting and double-acting according to the hydraulic pressure;
can be divided into piston type, plunger type, multi-stage telescopic sleeve type, rack and pinion type, etc. according to the structural form;
can be divided into tie rods, earrings, feet, hinges, etc. according to the installation form;
can be divided into 16Mpa, 25Mpa, 31.5Mpa, etc. according to the pressure level.

GB/T 24655-2009 Agricultural tractors Split hydraulic cylinder
JB/T for traction agricultural implements 13790-2020 Earthmoving machinery Hydraulic cylinder remanufacturing Technical specifications
JB/T 11588-2013 Large hydraulic cylinder

In a certain year, the plaintiff purchased a truck of XX brand from the defendant. The following year, driver Y hired by the plaintiff drove the truck to a steel plant to unload goods. The hydraulic cylinder broke and the bucket hit the beam, causing the beam to bend, the engine gearbox to fall off, the cab decorations to be damaged, and the driver to be injured.
was entrusted by the court to conduct appraisal and analysis on "whether there are quality problems" in the hydraulic cylinder of the vehicle involved.
appraisal analysis results: The
appraisal analysis expert group discussed the relevant information and on-site investigation of the vehicle's hydraulic cylinder involved in the case and made a comprehensive quality technical analysis, and made the following suggestions and conclusions:
's vehicle's hydraulic cylinder sleeve weld seam has the physical evidence characteristics of undercuts and discontinuous welds, and the vehicle's hydraulic cylinder involved in the case has quality problems. The existence of this quality problem is causally related to the occurrence of the accident involved.