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Bypass type inner guide fuel gas injection valve with floating valve seat

A technology of gas injection valve and floating valve seat, which is applied in the direction of engine components, combustion engines, machines/engines, etc., which can solve the problems affecting the normal use of the engine, engine performance, unstable engine speed, reverse leakage of injection valves, etc., to avoid Airflow interference, ensuring reliability and safety, and achieving the effect of stabilizing the gas path

Active Publication Date: 2017-12-01
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, natural gas engines often have insufficient gas supply when working under full working conditions, resulting in unstable speed when the engine is running under full working conditions, which will be more serious on high-power engines, which seriously affects the normal use of the engine and engine performance
In the case of severe engine operating conditions, the injection valve is prone to reverse leakage

Method used

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  • Bypass type inner guide fuel gas injection valve with floating valve seat
  • Bypass type inner guide fuel gas injection valve with floating valve seat
  • Bypass type inner guide fuel gas injection valve with floating valve seat

Examples

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Embodiment Construction

[0017] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0018] combine Figure 1-7 , figure 1 It is a schematic diagram of the overall structure of the bypass-type inner-guided gas injection valve with a floating valve seat of the present invention, which mainly consists of an electromagnet 1, a coil 2, a main return spring 3, an auxiliary return spring 4, a valve core assembly 5, a valve body 7 and The floating valve seat consists of 8. The electromagnet 1 is fixed on the valve body 7 by the fixing bolt 9, the coil 2 is wound in the ring groove inside the electromagnet 1, and the valve core assembly 5 and the floating valve seat 8 are arranged in sequence from top to bottom under the electromagnet 1.

[0019] Such as figure 2 As shown, a valve core assembly 5 of a bypass-type inner-guided gas injection valve with a floating valve seat is mainly composed of a guide pin 11, a retaining spring 19, an armature 12, a s...

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Abstract

The invention aims at providing a bypass type inner guide fuel gas injection valve with a floating valve seat. Through the floating valve seat structure, reverse leakage caused by imbalance of the internal and external pressure of the fuel gas injection valve is avoided, and the working reliability of the fuel gas injection valve is guaranteed. The gas intake and flow guide process is realized through a bypass structure and a flow guide cavity structure. An actuator is used for controlling a valve element and a gas circuit to realize the function of gas injection of the fuel gas valve. Through cooperation of an inner guide structure, pressure balance holes and pressure balance slots, the perpendicularity of the valve element is guaranteed, the working stability and reliability of gas flow are realized, and the response speed is high. The mixed gas intake method of direct gas intake through an axial main gas slot and gas intake through circumferential gas make-up holes, the large flow is realized, and the gas supply efficiency of an engine is effectively improved. Meanwhile, gas flow interference can be avoided, and the stability of the gas circuit is realized. Through multiple ring band structures between the valve element and the valve seat, surface sealing and high reliability of the fuel gas injection valve are realized.

Description

technical field [0001] The invention relates to a gas injection valve, in particular to a gas injection valve for a natural gas engine. Background technique [0002] In recent years, with the rapid growth of my country's oil consumption, oil is heavily dependent on imports. Natural gas burns cleanly and has abundant reserves in my country, making it the most likely fuel to replace diesel. Natural gas engines have good application prospects as ship power, especially as propulsion power for inland watercraft. As a fuel supply device for a natural gas engine, the performance of the gas injection valve directly determines the economy and emission performance of the natural gas engine. At present, natural gas engines often have insufficient gas supply when working under full working conditions, resulting in unstable speed when the engine is running under full working conditions, which will be more serious on high-power engines, which seriously affects the normal use of the engi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M21/02
CPCF02M21/0248F02M21/0254F02M21/026Y02T10/30
Inventor 宋恩哲范立云姚崇杨立平董全孙军
Owner HARBIN ENG UNIV
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