Gas-liquid conversion pressurizing cylinder

Abstract

A gas-liquid conversion booster cylinder belongs to a pneumatic-hydraulic conversion element. According to the design scheme provided by the present invention, a piston chamber c is provided in the center of the cylinder head, and a high-pressure main oil seal and a low-pressure main oil seal are arranged in sequence in the piston chamber c from top to bottom, and the piston chamber is divided into a high-pressure chamber a and a low-pressure chamber b; there is a cylinder body under the cylinder head, a movable piston is arranged in the cylinder body, a piston rod is installed on the piston, and the upper end of the piston rod is slidably connected in the piston chamber; in the cylinder head around the piston chamber c A number of spring seat holes d parallel to the piston cavity c are provided respectively, and an air return spring is respectively placed in each spring seat hole d, and the lower end of the air return spring is in contact with the piston. The invention occupies a small actual space, has a simple and reliable structure, and can work without oil supply for a long time. At the same time, driven by low-pressure compressed air, it outputs two kinds of hydraulic oil with different pressures of low and high.

Description

technical field [0001] The invention relates to a pneumatic-hydraulic (that is, power conversion) element, which is driven by low-pressure compressed air to successively generate two hydraulic oils of different pressures (first, the low-pressure hydraulic oil is output quickly, and after a period of time, the high-pressure hydraulic oil is output Pressure hydraulic oil) fluid power conversion device. It is characterized by small actual space, simple structure, and reliability, and is especially suitable for aerospace, aviation, rail transit and other occasions that require high volume, quality, and reliability of original devices. For example, as a maglev, the hydraulic power source of the brake system of a low-speed maglev train, and the gas-liquid conversion booster cylinder of the present invention are the best choices. Background technique [0002] The gas-liquid conversion booster cylinder is a power conversion component that uses low-pressure compressed air to drive h...

AI Technical Summary

Problems solved by technology

At the same time, when the piston is driven by air pressure, lubricating oil must be supplied externally. Therefore, it is impossible to complete the long-term work without oil supply and lubrication, and it is also impossible to rely on its own characteristics to realize the drive with low-pressure compressed air, and successively produce Two hydraulic oils of different pressures

Since the reset of the cylinder piston adopts a central spring, the spring characteristics and the remaining space of the booster cylinder are not well utilized, so that the actual space occupied by this type of booster cylinder is quite large under the same input and output conditions.

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