Piston valve type energy accumulator

Abstract

The invention discloses a piston valve type energy accumulator. The piston valve type energy accumulator comprises a cylinder barrel and a piston valve, wherein the piston valve is suspended in the cylinder barrel; the cylinder barrel is divided into an upper chamber for accommodating high-pressure gas and a lower chamber for accommodating high-pressure oil by the piston valve; and a gas charginghole connected to a high-pressure gas tube and a high-pressure oil hole connected to a high-pressure oil tube are formed in the bottom of the lower chamber. The piston valve type energy accumulator does not use a sealing ring, and effectively overcomes the defects that the service life is short as the sealing ring is damaged, the piston sinks, gas enters a pipeline, system faults are liable to cause, and maintenance difficulty is great, and the like.

Description

technical field [0001] The invention relates to the technical field of hydraulic pressure, in particular to a piston valve type accumulator. Background technique [0002] The accumulator is an energy storage device in the hydraulic system. Its function is to store the excess energy in the system at an appropriate time, and release the stored energy when the system needs it, and re-supply the system. The piston accumulator is a form of accumulator commonly used in the prior art, such as Figure 1-2 As shown, the cylinder 110 is divided into an upper chamber 130 for containing high-pressure gas and a lower chamber 140 for containing high-pressure oil by a piston 120 located therein. Wherein, the top of the upper chamber 130 is provided with an inflation port 111 connected to the high-pressure air pipe 150, and the replenishment of high-pressure gas in the upper chamber 130 is realized by adjusting the inflation valve 151 provided on the high-pressure air pipe 150; the bottom o...

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Problems solved by technology

[0003] 1. The sealing ring 121 frequently rubs against the inner wall of the cylinder 110 for a long time, which is easy to be damaged, causing the piston to sink to the bottom, resulting in a short service life of the accumulator 100 as a whole;

[0004] 2. After the sealing ring 121 is damaged, the compressed high-pressure gas easily enters the lower chamber 140, and enters the system through the high-pressure oil pipe 160 as the piston 120 moves down, causing system failure;

[0005] 3. The sealing ring 121 is located inside the cylinder 110. On the one hand, it is not conducive to the staff not to be able to find its damaged state in time. On the other hand, even if it is found to be damaged, it is not easy to replace, resulting in difficult maintenance;

[0006] 4. Since the sealing ring 121 is in close contact with the cylinder 110, the friction between the sealing ring and the inner wall of the cylinder needs to be overcome first in order to move the piston 120, so that the response speed of the accumulator 110 is slow

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