The hydraulic cylinder, in fact, is an integral part of the mechanical equipment. It should meet the requirements of thrust, stroke, installation space and installation size of the whole equipment. Special compact structure of the construction machinery, the cylinder limit is very strict.
After determining the thrust (pulling force), stroke, movement speed and installation mode of the oil cylinder, the rated pressure and flow rate of the main oil pump, the pressure and thrust of the oil cylinder are determined, and the inner diameter of the oil cylinder is determined. The speed and inner diameter of oil cylinder determine the flow rate of oil pump.
If you know the inner diameter, working pressure, stroke and connection mode of the oil cylinder, you can select the type. There are national standards for oil cylinder, and the commonly used model is called standard cylinder.
For example,According to the thrust of 4 tons, it can be calculated that if the Bai pressure of the oil cylinder is designed to be 8Mpa, the inner diameter of the oil cylinder is 80, and the model of the oil cylinder is 80 * 40 * 300-8mpa. The rod type cylinder can be used with low price and convenient maintenance.If the working pressure of the oil cylinder is 16MPa, the inner diameter of the oil cylinder is 60, and the model of the oil cylinder is 60 * 35 * 300-16mpa, and the welding type or pull rod type can be used.It is recommended that you combine the system pressure of mechanical equipment to determine the working pressure of oil cylinder first. If the mechanical equipment is finished, the system pressure should be lower, usually less than 5MPa. If the mechanical equipment is rough machined, the system pressure should be higher
However, the standards of oil cylinder are numerous and disorderly, including national standards, standards of the Ministry of machinery, and various industry standards. The cylinder barrel, sealing, connection and experimental methods of the oil cylinder have their own standards. The best way is supply drawing to factory.
Post time: Dec-04-2020