Externally-controlled isolation type double air-chamber hydro-pneumatic suspension cylinder

Abstract

The invention discloses an externally-controlled isolation type double air-chamber hydro-pneumatic suspension cylinder, which comprises a piston rod, a piston, an internal control valve group, a cylinder barrel, a sealing seat ring, an energy accumulator, a control valve and a pipeline. A suspension cylinder inner cavity is enclosed by the cylinder barrel, the piston rod and the piston. A secondary oil cavity is enclosed by the cylinder barrel, the sealing seat ring, the piston rod and the piston. The secondary oil cavity is filled with hydraulic oil and is completely isolated from the suspension cylinder inner cavity. The suspension cylinder inner cavity comprises a cylinder barrel inner cavity and a piston rod inner cavity. The cylinder barrel inner cavity is filled with hydraulic oil, and an external control interface is formed in the bottom of the cylinder barrel inner cavity. The piston rod inner cavity is filled with hydraulic oil and nitrogen. The cylinder barrel inner cavity and the piston rod inner cavity form an integrated and independent suspension cylinder inner cavity system through the internal control valve group. The secondary oil cavity is externally connected with the energy accumulator and the control valve through the pipeline to form an independent external control circuit. The control valve is provided with an external control interface. The suspension cylinder can be controlled by the two external control interfaces. The suspension cylinder inner cavity system and the external control circuit form a double air-chamber back pressure opposition structure. The internal control valve group performs automatic variable damping control on the suspension cylinder inner cavity system according to the system pressure.

Description

technical field [0001] This patent relates to an oil-pneumatic suspension cylinder, and specifically discloses an externally controlled isolated double-air chamber oil-pneumatic suspension cylinder, and discloses its new structural characteristics and use functions. Background technique [0002] The oil-pneumatic suspension cylinder integrates the structural principles and functions of the air spring and hydraulic damper, and has better mechanical properties and application range. The oil-air suspension cylinder is filled with nitrogen and hydraulic oil. Nitrogen, as an elastic medium and energy storage medium, has variable stiffness characteristics, and has a greater energy storage ratio than metal elastic materials. Hydraulic oil is used as a damping medium to generate damping force through the damping structure inside the suspension cylinder. [0003] Because the nitrogen is encapsulated in the cylinder structure, the oil-pneumatic suspension cylinder has greater workin...

AI Technical Summary

Problems solved by technology

The existing basic structure of the oil-pneumatic suspension cylinder lacks the structural basis and conditions for complete realization

[0024] 5. The existing oil-pneumatic suspension cylinders of various structures focus on the combination of the internal stiffness and damping characteristics of the suspension cylinder itself, as well as the integrity and reliability of independent operation, and do not consider the setting of the external input port and the external active control. Internal control link

However, it is limited to the suspension components, the working capacity, control capacity, system accuracy and cost composition of the electronic control system, and is greatly restricted in the application of large vehicles and popular products.

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