Single-acting oil cylinder for gas storage reflux

Abstract

The invention provides a single-acting oil cylinder for gas storage reflux. The single-acting oil cylinder comprises a cylinder cover assembly, a piston rod, a cylinder body assembly and a piston; thecylinder cover assembly and the cylinder body assembly are fixedly connected, one end of the piston rod penetrates through the cylinder cover assembly and extends into the cylinder body assembly, thepiston is fixedly connected with the end part of the piston rod extending into the cylinder body assembly, and the piston divides the cylinder cover assembly and the cylinder body assembly into a rodcavity and a rodless cavity; the interior of the piston rod is hollow, a vent groove is formed in the piston, and the vent groove is communicates with the rod cavity and the piston rod. When the piston rod of the single-acting oil cylinder for the gas storage reflux extends out, and gas compressed by the rod cavity enters the interior of the piston rod through the vent groove in the piston, so that the air pressure of the rod cavity is small when the piston rod completely extends out; the piston is close to the maximum travel position, the volume of the rod cavity is small, and the hollow piston rod can provide a compressible space for the air with the rod cavity. According to the single-acting oil cylinder, the compressibility of the gas is fully utilized, and it is guaranteed that the pressure of the rod cavity is within a controllable range.

Description

technical field [0001] The invention relates to a single-acting oil cylinder, in particular to a single-acting piston oil cylinder with controllable gas storage backflow. Background technique [0002] The single-acting hydraulic cylinder has only one effective area and can only generate thrust. The reset of the piston can only rely on the spring, or rely on the weight of the piston, or rely on external force. The piston of the cylinder will be compressed during the extension process, resulting in a The rod chamber pressure increases. There are two current solutions: [0003] The one is that the oil pipe 81 is installed in the rod cavity of the piston cylinder to discharge and inhale air (such as figure 1 ), this structure will increase the welding of the oil return pipe 81, and the oil return pipe 81 will be connected to the leather tube accordingly, which increases the corresponding cost, and the sucked air will also pollute and corrode the oil cylinder. [0004] The sec...

AI Technical Summary

Problems solved by technology

This structure also has high requirements on the one-way valve 82. Once the one-way valve 82 leaks oil, the entire cylinder will leak internally, and the price of the one-way valve 82 and the manufacturing cost of the piston are very high.

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