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Fuel metering mechanism capable of realizing accurate control

A precise control and fuel technology, applied in the valve shell structure, mechanical equipment, engine components, etc., can solve problems such as affecting the accurate measurement of fuel, damage, and the inability of the valve core to be accurate and stable.

Active Publication Date: 2020-04-17
XIAN AERO ENGINE CONTROLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fuel before metering of the fuel metering mechanism communicates directly with the fuel after the pump. During the process of oil suction and pressure of the hydraulic pump, the instantaneous flow rate is uneven, which will cause flow pulsation, which will cause pressure pulsation. This pressure pulsation will occur in the system. Generate periodic pressure waves, which cause periodic vibration, crawling, noise, and even damage to the valve core
When the spool moves from one position to another, due to the influence of pressure waves, the spool cannot be precisely stabilized, which affects the precise metering of fuel

Method used

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  • Fuel metering mechanism capable of realizing accurate control
  • Fuel metering mechanism capable of realizing accurate control
  • Fuel metering mechanism capable of realizing accurate control

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Embodiment Construction

[0017] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0018] figure 2 It is a structural schematic diagram of the present invention, mainly composed of a valve core 12, a valve sleeve 6, a damping needle 4, an angular displacement sensor 8, a minimum flow adjustment nail 2, a maximum flow adjustment nail 10, an end cover 1, and a screw plug 11.

[0019] The damping needle 4 is installed inside the spool 12, and is fixed by rolling the end cover 1 to close. The left end of the damping needle 4 communicates with the control chamber, and the right end communicates with the fuel chamber behind the pump. The spool 12 is provided w...

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Abstract

The invention relates to a fuel control system, in particular to a fuel metering mechanism capable of realizing accurate control. The fuel metering mechanism comprises a valve core (12), two ends of the valve core (12) are provided with control cavities, the pressure of one control cavity A is a constant value, and the fuel metering function is realized by adjusting the pressure of the other control cavity B. The pressure source of the control cavity B is fuel oil after booster pumping, and an overflow valve ensures that the pumped oil pressure is constant. The overflow valve is installed on ashell (9), when the oil pressure after booster pumping exceeds the limit value, the generated hydraulic pressure exceeds the spring force, the valve is pushed to move, a valve port is opened, an oilpath after pumping communicates with an oil return path, and the oil pressure is reduced to the limit value.

Description

technical field [0001] The invention relates to a fuel control system, in particular to a fuel metering mechanism capable of realizing precise control. Background technique [0002] The existing fuel metering mechanism is generally composed of a spool, a valve sleeve, a servo control mechanism, an adjustment nail, etc., through the fuel oil pressure behind the pump and the servo fuel oil pressure jointly controlling the moving direction of the spool to change the opening of the hole. Change the fuel flow to realize fuel metering. [0003] figure 1 Shown is the fuel metering mechanism in an existing mature product, and the electro-hydraulic servo valve in the fuel metering mechanism receives instructions to control the fuel pressure to both ends of the metering valve. When it is necessary to increase the fuel flow in the combustion chamber of the engine, the electro-hydraulic servo valve increases the flow to the left chamber of the metering valve, and the valve core of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K3/314F16K3/30F16K3/316F16K27/04F16K31/06F16K31/12F16K37/00
CPCF16K3/314F16K3/30F16K3/316F16K27/04F16K31/0668F16K31/12F16K37/0083
Inventor 万丽萍王倡丽欧阳文龙权军虎杜枫杨帅
Owner XIAN AERO ENGINE CONTROLS