Small-sized fuel adjuster of turbojet engine

Abstract

The invention provides a small-sized fuel adjuster of a turbojet engine, which relates to a mechanical fuel adjusting device and is applicable to adjusting the flow of oil return type pressure atomizing nozzles. The small-sized fuel adjuster consists of a shell, an adjusting needle, an O-shaped sealing ring, a spring cover, a spring, an oil distributing block and a one-way valve, the oil distributing block is mounted in the shell, a cavity a, a cavity b and a cavity c are disposed on the oil distributing block, the spring is mounted in the cavity b of the oil distributing block, the spring cover is mounted on the spring and provided with an adjusting needle mounting hole, the upper portion of the adjusting needle is mounted in the cavity a, the lower portion of the adjusting needle is mounted in the cavity b and the cavity c, the O-shaped sealing ring is mounted on the upper portion of the adjusting needle, an oil inlet channel and an oil return channel are separated via the O-shaped sealing ring, and the one-way valve is mounted on the shell; and the cavity a is communicated with the oil inlet channel, pressure in the cavity a is equal to oil inlet pressure, an opening C is connected with a nozzle to realize oil return, one end of the one-way valve is connected with the cavity b, the other end of the one-way valve is connected with an opening H, an adjusting hole is arranged between the cavity b and the cavity c, and the adjusting needle is inserted in the adjusting hole.

Description

technical field [0001] The invention relates to a small-sized turbojet engine fuel regulator, which relates to a mechanical fuel regulator, which is suitable for flow regulation of an oil return type pressure atomizing nozzle, and has the advantages of quick regulation in low working conditions, smooth regulation in high working conditions, and large overall regulation ratio. For small turbojet engine fuel conditioning system. Background technique [0002] Centrifugal pressure atomizing nozzles are often used in the fuel system of small turbojet engines. To solve the problem of difficult flow adjustment of single-channel centrifugal pressure atomizing nozzles, oil return pressure atomizing nozzles have been developed to increase the flow adjustment range. The oil return pressure atomizing nozzle generally uses a quantitative pump to keep the total fuel volume constant, and uses an electro-hydraulic servo valve to control the oil return volume of the system to indirectly cont...

AI Technical Summary

Problems solved by technology

Oil return pressure atomizing nozzles generally use quantitative pumps to keep the total fuel volume constant, and use electro-hydraulic servo valves to control the oil return volume of the system to indirectly control the system demand. The structure is complex, the requirements for actuators are high, and the adjustment ratio is low.

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