A precise small-flow fuel oil supplying system based on pistons and hydraulic cylinders

Abstract

The invention discloses a precise small-flow fuel oil supplying system based on pistons and hydraulic cylinders, and belongs to the field of gas turbines. The system includes parallel hydraulic cylinder subsystems and a control system connected to the hydraulic cylinder subsystems. After stepping motors receive information from the control system, the stepping motors drive screw bars to rotate soas to drive sliding blocks to move axially and horizontally; projections at bottoms of the sliding blocks are constrained by guide rails on supports so that the sliding blocks can only move left and right; and when the sliding blocks move left and right, mechanical bars are driven to move left and right, thus pushing the pistons to move left and right to extrude fuel oil in the hydraulic cylinders. Precise and stable left-and-right movement of the pistons in the hydraulic cylinders is achieved by controlling precise and stable rotation of the stepping motors, and precise, stable small-flow fuel oil supply by nozzles is finally achieved.

Description

technical field [0001] The invention belongs to the field of gas turbines, and relates to a supply system for realizing stable and precise fuel supply to fuel nozzles of a combustion chamber of a gas turbine under low flow conditions, and specifically refers to a small-flow precise fuel supply system based on pistons and hydraulic cylinders. Background technique [0002] At present, whether it is a gas turbine (including ground gas turbine and civil aviation engine) fuel nozzle or an internal combustion engine nozzle, the oil supply pressure and air pressure provided by the oil pump are used to form a pressure difference between the inside and outside of the fuel nozzle, so that the fuel is sprayed into the combustion chamber for fogging. The system structure of this oil supply method is simple and easy to maintain. When carrying out research on the atomization characteristics of fuel nozzles under laboratory conditions, the required fuel flow rate is very small due to the a...

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Problems solved by technology

When carrying out research on the atomization characteristics of fuel nozzles under laboratory conditions, the required fuel flow rate is very small due to the atmospheric environment being normal pressure and small air flow, especially for the research on the atomization characteristics when the nozzle auxiliary oil circuit supplies fuel alone When the fuel flow is often less than 1g / s, the fuel pulsation is very severe due to the fuel leakage in the fuel pump, the oil pressure cannot be stabilized, and the fuel flow cannot be precisely controlled, so it is impossible to carry out research on the atomization characteristics of the fuel nozzle. Work

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