Hydraulic cutting machine Telescopic hydraulic cylinder, also known as multi-stage hydraulic cylinder or combined hydraulic cylinder, is a special hydraulic cylinder with a wide range of applications. According to the different number of expansion and contraction, it can be divided into 2, 3, 4, 5 telescopic hydraulic cylinders; it can be divided into single-acting and double-acting multi-stage hydraulic cylinders according to the number of times of liquid supply in one working cycle, among which single-acting multi-stage hydraulic cylinders The cylinder is a plunger type telescopic hydraulic cylinder, the double-acting multi-stage hydraulic cylinder is a piston type telescopic hydraulic cylinder, and there is a telescopic hydraulic cylinder whose last stage is a piston and the front multistage (or one stage) is a plunger.
The characteristics of the hydraulic cutting machine telescopic hydraulic cylinder are:
(1) The total stroke of the telescopic hydraulic cylinder is the sum of the strokes of the sleeves (or plungers) of each stage, so the stroke can be quite long. When not working, the length of the entire hydraulic cylinder can be shortened very short, and is widely used for installation dimensions. Where the requirements are small and the work schedule is demanding. The most typical application example is the telescopic boom of a truck crane. In addition, it is widely used in hydraulic supports for dump trucks, cleaning vehicles and mining machinery.
(2) When the hydraulic cylinders of different stages of the telescopic hydraulic cylinder are extended one by one, the effective effective area is gradually reduced. Therefore, when the flow rate input to the hydraulic cylinder is constant, the overhanging speed is successively increased; when the load is constant, the working pressure of the hydraulic cylinder is successively increased. During operation, the first-stage hydraulic cylinder of the telescopic hydraulic cylinder first extends, and the final-stage cylinder finally protrudes; when returning, the final-stage hydraulic cylinder is first returned, and the first-stage hydraulic cylinder is finally returned.