Piston device with speed response mechanism

Abstract

The invention belongs to the field of aero-engine fuel systems, and relates to a piston device with a speed response mechanism, which includes a casing and a piston placed inside the casing. The casing is provided with an inlet of a working oil circuit and an outlet of a working oil circuit, and the piston is provided with a Ring-shaped working oil channel; the piston includes a piston head and a flow-adjustable piston seat fixedly connected to the piston head; the housing is provided with a regulating oil circuit inlet and an regulating oil circuit outlet; the regulating oil circuit inlet passes through the flow-adjustable piston seat It communicates with the outlet of the regulating oil circuit; when the outlet of the regulating oil circuit is closed, the piston head moves in the casing along the axial direction of the casing, and the inlet of the working oil circuit communicates with the outlet of the working oil circuit through the annular working oil circuit channel; when the regulating oil circuit When the outlet of the oil circuit is opened, the piston head moves in the housing along the axial direction of the housing, and the inlet of the working oil circuit is disconnected from the outlet of the working oil circuit. The invention can ensure the oil supply rate during the ignition of the product and can work normally after ignition.

Description

technical field [0001] The invention belongs to the field of aero-engine fuel systems, and relates to a piston device with a speed response mechanism, in particular to a piston device with a speed response mechanism used for the aero-engine fuel system to control and connect a combustion chamber. Background technique [0002] The valve of the prior art (the structural schematic diagram of the adopted piston is as follows: figure 1 shown) during normal operation, the piston is controlled by the fuel pressure difference between the left and right chambers (the structure diagram is shown in figure 1 The movement of the shown) controls the opening and closing of the oil circuit, and quickly stops against the mating surface of the matching components, which will inevitably cause a sudden change in the valve opening, resulting in a sudden change in the oil supply, which is not conducive to the ignition of the engine, resulting in rich oil flameout Phenomenon. SUMMARY OF THE INV...

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Problems solved by technology

[0002] The valve of prior art (the structural representation of adopted piston is as figure 1 shown) in normal operation, the piston is controlled by the fuel pressure difference between the left and right chambers (the structural diagram is shown in figure 1 shown) to control the opening and closing of the oil circuit, and quickly stop against the mating surface of the matching components, which will inevitably cause a sudden change in the opening of the valve, resulting in a sudden change in fuel supply, which is not conducive to the ignition of the engine, resulting in fuel-rich flameout Phenomenon

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