Integrated double-air-chamber oil-gas damper and working method thereof

Abstract

The invention discloses an integrated double-air-chamber oil-gas damper and a working method thereof. A first floating piston divides the interior of a first cylinder body into a first air cavity anda first oil cavity; a main piston is fixedly arranged on the periphery of the first cylinder body, the inside of a second cylinder body is divided into a main chamber and an auxiliary chamber by the main piston, the main chamber directly communicates with the first oil cavity, and the main piston is further provided with a damping hole; and a second floating piston is movably sleeved with the auxiliary chamber and divides the auxiliary chamber into a second air cavity and a second oil cavity, and the second oil cavity communicates with the main chamber through the damping hole. The damper is provided with the first air cavity and the second air cavity, when the damper works normally, a pressure of the second air cavity can be kept unchanged, that is, the second floating piston can be keptunchanged in an initial state, and only the first floating piston moves; and when a large impact occurs, the first floating piston and the second floating piston can participate in work at the same time, so that the overall rigidity of a system is reduced to relieve the impact, and the driving comfort is improved.

Description

technical field [0001] The invention relates to an integrated double-chamber oil-gas damper and a working method. Background technique [0002] The oil-gas damper is a suspension system that uses inert gas (generally nitrogen) as the elastic medium of the suspension to generate elastic force, and uses hydraulic oil as the force transmission medium. The principle of shock absorption is that the oil flows through the damping hole on the main piston during the up and down movement of the piston to generate a damping force to achieve energy attenuation; and the compressibility of the gas is used to absorb and release energy, because the gas is compressed The gas elastic force generated in the process has nonlinear characteristics, so the stiffness of the oil-gas damper can change with the relative displacement of the piston and the hydraulic cylinder, which has certain nonlinear characteristics and can coordinate the operation of the vehicle to a greater extent. The balance bet...

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Problems solved by technology

[0003] The traditional dual-chamber oil-gas damper adopts the structure of the external gas accumulator, which plays a buffering and shock-absorbing effect when the damper moves up and down. This arrangement places the gas chamber on the outside and requires additional tubes. It is not conducive to the compact structure design; on the other hand, the external gas accumulator is easily affected by external factors in actual work, and the oil-gas damper is very important for the sealing between various components. The performance requirements are relatively high, and any damage to any part will easily lead to failure and leakage, so the cost of producing and maintaining oil and gas dampers is relatively high

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