High-pressure piston type accumulator

Abstract

The invention discloses a high-pressure piston type accumulator, relating to the technical field of hydraulic auxiliary elements and solving the technical problem of prolonging the service life and enhancing the working pressure. The high-pressure piston type accumulator comprises a cylinder barrel, a piston arranged in the cylinder barrel, and an oil lateral connecting flange and a gas lateral connecting flange which are respectively fixed on the both ends of the cylinder barrel, wherein an oil hole is arranged on the oil lateral connecting flange; a charging nozzle is arranged on the gas lateral connecting flange; a circle of guide belt grooves, a circle of oil storage grooves, a circle of seal grooves, a circle of gas storage grooves and a circle of guide belt grooves are axially and successively arranged on the piton; guide belts are arranged in both two guide belt grooves; combined sealing elements are arranged in the seal grooves; a one-way valve is respectively arranged on the both ends of the piston; an inlet of one one-way valve is communicated with the gas storage grooves on the cylindrical surface of the piston, and an outlet of the one-way valve is communicated with an oil cavity; and an inlet of the other one-way valve is communicated with the gas storage grooves on the cylindrical surface of the piston, and an outlet of the one-way valve is communicated with a gas cavity. The accumulator can effectively avoid oil liquid from leaking into the gas.

Description

technical field [0001] The invention relates to the technology of hydraulic auxiliary components, in particular to the technology of a high-pressure piston accumulator. Background technique [0002] The piston accumulator has the advantages of simple structure, long life, small size, easy installation, easy maintenance, easy manufacture, etc. It is an indispensable auxiliary component in the hydraulic system. [0003] The piston accumulator mainly plays the following roles in the hydraulic system: 1) Absorb the pressure shock of the system, ease the system pressure and flow fluctuation; 2) Accumulate energy, supplement the flow when the pump displacement is insufficient; 3) Maintain pressure, It is used for pressure maintenance when the system is in a non-working cycle; 4) Safety function, it is used for the ability replenishment of the fast action of the actuator in the system. [0004] The inner chamber of the cylinder of the traditional piston accumulator is divided into...

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Problems solved by technology

[0004] The inner chamber of the cylinder of the traditional piston accumulator is divided into two working chambers by the piston, one of which is an oil chamber and the other is an air chamber. The pistons are equipped with seals and guide belts. Due to the frequent movements of the pistons During the process, the pressure oil will continue to accumulate on the side of the seal facing the oil chamber, which will cause a pressure difference on the seal when the piston moves, thereby affecting the service life of the seal. Similarly, the gas will gradually accumulate on the seal toward the gas chamber. On one side of the cavity, as the pressure increases, the gas will penetrate into the oil, which will lead to a gradual decrease in the pneumatic pressure, which will eventually fail to meet the function of the accumulator

Therefore, traditional piston accumulators can only be used in low-pressure systems (less than 10MPa), and have the disadvantage of poor system sealing performance

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