Adjustable travel piston type energy accumulator

The utility model discloses product technology of an adjustable travel piston type energy accumulator. The shortcomings that the existing like product is big in collision vibration and narrow in range of application are overcome. The adjustable travel piston type energy accumulator comprises a cylinder body, a piston, a gas cavity and an oil cavity. Two ends of the cylinder body are respectively provided with a gas port end cover and an oil port end cover. A pair of guide rings and a plurality of seal rings are arranged on the outer surface of the circumference of the piston. The end surface of the piston is connected with a travel rod. The travel rod passes through the oil cavity and protrudes out of the cylinder body from a center through hole of the oil port end cover. A travel limiting device is arranged on the rod portion of the travel rod. A seal gland is arranged on the outer end surface of the oil port end cover. A scraper seal and an oil seal are arranged between the center of the seal gland and the circumferential surface of the travel rod in an embedded mode. The adjustable travel piston type energy accumulator not only has functions of absorbing impact, eliminating pulsation, storing energy and stabilizing pressure, but also avoids that two side end surfaces of the piston directly hit against end covers of the cylinder body. The adjustable travel piston type energy accumulator is particularly suitable for hydraulic control system pipeline application in the space flight, the aviation, the metallurgy, the war industry, the moving vehicle loading and the like.