Piston device with speed response mechanism

Abstract

The invention belongs to the field of aero-engine fuel oil systems, and relates to a piston device with a speed response mechanism. The piston device comprises a shell and a piston mounted in the shell, the shell is provided with a work oil path inlet and a work oil path outlet, the piston is provided with an annular work oil path channel, the piston comprises a piston head and a flow adjusting type piston base fixedly connected with the piston head, an adjusting oil path inlet and an adjusting oil path outlet are formed in the shell, the adjusting oil path inlet communicates with the adjusting oil path outlet through the flow adjusting type piston base, when the adjusting oil path outlet is closed, the piston head can move in the shell in the axial direction of the shell, the work oil path inlet communicates with the work oil path outlet through an annular work oil path channel, when the adjusting oil path outlet is opened, the piston head moves in the shell in the axial direction ofthe shell, and the work oil path inlet and the work oil path outlet are disconnected. The oil supply rate of a product during the ignition period can be ensured, and after ignition, normal work is achieved.

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 for controlling connection of a combustion chamber in an aero-engine fuel system. Background technique [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. Contents of the invention [0003] In order to solve t...

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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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