CN107131076B - Straight-through type internal guide gas injection valve with floating valve seat - Google Patents
Straight-through type internal guide gas injection valve with floating valve seat Download PDFInfo
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- CN107131076B CN107131076B CN201710504570.8A CN201710504570A CN107131076B CN 107131076 B CN107131076 B CN 107131076B CN 201710504570 A CN201710504570 A CN 201710504570A CN 107131076 B CN107131076 B CN 107131076B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0251—Details of actuators therefor
- F02M21/0254—Electric actuators, e.g. solenoid or piezoelectric
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
- F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
- F02M21/026—Lift valves, i.e. stem operated valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention aims to provide the straight-through type internal guide gas injection valve with the floating valve seat, which realizes the reverse leakage function caused by unbalanced internal and external pressure of the gas injection valve through the floating valve seat structure, and ensures the working reliability of the gas injection valve; the air inlet and the flow guiding process are realized through the straight-through structure and the flow guiding cavity structure; the control of the valve core and the control of the air path are realized through the control of the actuator, so that the air injection function is realized; the inner guide structure is matched with the pressure balance hole and the pressure balance groove, so that the perpendicularity of the valve core is ensured, the stable work and the reliable work of air flow are realized, and the high response speed is realized; the high flow is realized by the mixed air inlet mode of direct air inlet of the axial main air groove and air inlet of the circumferential air-filling holes, the air injection efficiency of the engine is effectively improved, the air flow interference can be avoided, and the stability of the air path is realized; the surface sealing and high reliability of the gas injection valve are realized through the multi-channel annular band structure between the valve core and the valve seat.
Description
Technical Field
The invention relates to a gas injection valve, in particular to a gas injection valve of a gas system of a natural gas engine.
Background
With the increasing stricter of emission regulations of ships and the continuous rising of fuel prices, gas engines and dual-fuel engines are increasingly important in the international market place. The fuel injection system is used as a key component of a gas engine and a dual-fuel engine, and the performance of the fuel injection system directly influences the dynamic property and the emission property of the engine. The gas injection valve is one of core parts of the gas engine with gas fuel electric control multi-point injection and comprises a dual-fuel engine, can realize the timing and quantitative stage gas supply and gas inlet layering of each cylinder, and has very important influence on the dynamic property and the emission property of the gas engine or the dual-fuel engine. Under the condition of severe engine working conditions, the injection valve is easy to generate reverse leakage. Therefore, it is necessary to design an injection valve having a reverse leakage preventing function. Meanwhile, a high-flow gas injection valve with high response speed, high control precision and good reliability needs to be developed, so that the circulation capacity of the high-flow gas injection valve can meet the normal working requirement of a natural gas engine in a high-load state.
Disclosure of Invention
The invention aims to provide the straight-through type internal guide gas injection valve with the floating valve seat, which has the advantages of high response speed, stable gas injection, high reliability and reverse leakage prevention function.
The purpose of the invention is realized in the following way:
the invention relates to a straight-through type internal guiding gas injection valve with a floating valve seat, which is characterized in that: the valve comprises a valve body, an electromagnet, a valve core assembly and a floating valve seat, wherein the electromagnet comprises an iron core, the iron core is fixed at the upper end of the valve body, a coil is wound in the iron core, and an annular groove is arranged in the iron core; the valve core assembly comprises an armature, a spring seat, a bottom plate and a valve core, wherein the armature, the bottom plate and the valve core are arranged from top to bottom and are simultaneously connected together through fastening bolts, the spring seat is positioned outside the armature and forms an annular groove with the armature, two ends of a main reset spring are respectively arranged in the annular groove of the iron core and the annular groove of the spring seat, a guide pin is arranged at the center of the armature and is fixed together through a clamp spring and the armature, the guide pin stretches into the iron core, an auxiliary reset spring is arranged in the iron core, two ends of the auxiliary reset spring are respectively contacted with the iron core and the guide pin, a pressure balance hole is arranged in the guide pin, a pressure balance groove is arranged on the bottom plate, the valve core is of a hollow structure, the pressure balance hole, the pressure balance groove and the hollow part of the valve core are communicated, a valve seat reset spring is arranged in the hollow part of the valve core, a sealing ring belt and a rib are arranged on the valve core, the sealing ring belt forms an annular cavity, the upper surface of the valve core is provided with an axial main air groove, and the rib is provided with a circumferential air supplementing hole; the floating valve seat comprises a guide base and a valve seat, wherein the guide base is fixed below the valve body, the valve seat is positioned below the valve core, a T-shaped structure is arranged on the inner ring of the guide base, the outer ring of the valve seat is arranged in the guide base through the T-shaped structure matched with the outer ring of the valve seat, two ends of a valve seat reset spring are respectively fixed on the valve seat and the valve core, an air outlet ring belt is arranged on the valve seat, the air outlet ring belt is positioned below the annular cavity, and an air outlet is arranged below the air outlet ring belt.
The invention may further include:
1. the double air leakage preventing structure is arranged between the valve seat and the guide base, the deformable sealing ring is arranged above the joint of the valve seat and the guide base, the pressing gasket is additionally arranged above the inner edge of the deformable sealing ring, the two layers of sealing rubber rings are arranged at the joint of the T-shaped structure of the valve seat and the guide base, and the elastic gasket is arranged at the joint of the T-shaped structure of the valve seat and the guide base.
2. An air inlet is formed between the upper part of the iron core and the valve body, a flow guide cavity is formed between the middle lower part of the iron core and the valve body, and the air inlet is communicated with the flow guide cavity; the air flows into the valve body vertically from the air inlet, flows into the valve body along the flow guide cavity, and after the coil is electrified, the armature drives the valve core to move upwards to be separated from the surface of the valve seat, the air passage is opened, the electromagnetic valve is opened, the air flows in a mixed air inlet mode of the axial main air groove and the circumferential air-filling hole, and flows out vertically from the air outlet through the annular cavity; after the coil is powered off, under the action of a return spring between the iron core and the spring seat, the armature drives the valve core to move downwards until the surface of the valve core is attached to the surface of the valve seat, the initial position is restored, the air passage is closed, and the electromagnetic valve is closed.
The invention has the advantages that: the invention adopts a structure with the floating valve seat, can effectively prevent the reverse leakage of the gas injection valve, has the function of shock absorption, and ensures the working reliability and safety of the gas injection valve; according to the invention, the pressure balance hole is formed in the center of the guide pin, and a certain number of pressure balance grooves are formed in the bottom plate, so that the armature is prevented from being subjected to axial force, the pressure of an inner gas circuit and an outer gas circuit at the armature is more easily balanced, and the response speed of the armature is improved; according to the invention, the four ribs of the valve core are provided with the circumferential air supplementing holes, so that the flow area is increased, the valve core quality is reduced, and the reliability is improved. The flow guide cone angle with a certain angle is arranged at the circumferential air filling hole of the valve core, so that the flow loss is reduced, and the flow coefficient is increased. The invention adopts a mixed air inlet mode of directly air inlet of the axial main air groove and air inlet of the circumferential air-filling holes, increases the air inlet flow coefficient, increases the air inlet amount, can avoid air flow interference and ensures that the air paths reach balance. The jet efficiency of the engine is effectively improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is an enlarged view of the valve core assembly structure of the present invention;
FIG. 3 is an enlarged view of the floating valve seat structure of the present invention;
FIG. 4 is a schematic diagram of the gas path;
FIG. 5 is a top view of the valve core structure;
FIG. 6 is a three-dimensional block diagram of a valve core structure;
FIG. 7 is a floating valve seat force diagram.
Detailed Description
The invention is described in more detail below, by way of example, with reference to the accompanying drawings:
referring to fig. 1-7, fig. 1 is a schematic diagram of the overall structure of the straight-through internal guiding gas injection valve with a floating valve seat, which comprises four parts of a valve body 1, an electromagnet 2, a valve core assembly 3 and a floating valve seat 4. The electromagnet 2 is connected with the valve body 1 through upper threads. The electromagnet 2 mainly comprises an iron core 5 and a coil 6. Annular grooves for arranging the main return spring 7 are formed in two sides of the iron core 5, a straight groove with a certain depth is formed in the center of the iron core 5, and a guide pin 9 between the iron core 5 and the armature 10 is arranged in the straight groove.
Fig. 2 shows a valve core assembly 3 mainly comprising a guide pin 9, an armature 10, a spring seat 14, a fastening bolt 19, a gasket 15, a bottom plate 16 and a valve core 20. The method is characterized in that: the armature 10, the washer 15, the base plate 16 and the valve core 20 are linked together by a fastening bolt 19, and the spring seat 14 is mounted on the base plate 16. The center of the guide pin 9 is provided with a pressure balance hole 12, the bottom plate 16 is provided with a certain number of pressure balance grooves 13, so that the armature 10 is prevented from being subjected to axial force, the pressure of an inner gas circuit and an outer gas circuit at the armature 10 is more easily balanced, and the response speed of the armature 10 is improved; the guide pin 9 and the armature 10 are fixed together by means of a snap spring 11. The main return spring 7 is located between the core 5 and the spring seat 14, and the auxiliary return spring 8 is located between the guide pin 9 and the core 5. After the coil 6 is electrified, the iron core 5 and the armature 10 are magnetized, a magnetic loop is formed between the iron core 5 and the armature 10, the armature 10 moves upwards after overcoming the pretightening force of the main reset spring 7 and the auxiliary reset spring 8 under the action of electromagnetic force, in the whole moving process, the axial movement and the circumferential positioning of the armature 10 are controlled by the cooperation between the guide pin 9 and the iron core 5 until the upper surface of the spring seat 14 is contacted with the lower surface of the iron core 5, after the armature 10 is maintained at the position for a period of time, the coil 6 is powered off, the electromagnetic force born by the armature 10 disappears, and the armature 10 moves downwards under the action of the main reset spring 7 between the iron core 5 and the spring seat 14 and the auxiliary reset spring 8 between the guide pin 9 and the iron core 5 until the armature 10 returns to the initial position again.
The four ribs 21 of the valve core 20 are respectively provided with 2 circumferential air supply holes 22, so that the response speed is improved, the flow area is increased, the quality is reduced, and the reliability is improved. The circumferential air-filling holes 22 are provided with a flow-guiding cone angle with a certain angle, so that the flow loss is reduced, and the flow coefficient is increased. The mixed air inlet mode of direct air inlet of the axial main air groove 35 and air inlet of the circumferential air-filling holes 22 is adopted, the air inlet flow coefficient is increased, the air inlet amount is increased, and meanwhile, air flow interference can be avoided, so that the air path reaches balance. The valve core 20 and the valve seat 31 adopt an air outlet ring belt 18 structure, are sealed in surface and balanced in pressure stabilization, and the impact can be reduced by the wider ring belt area, so that the reliability is improved.
The air path is shown in fig. 4, air flows vertically into the valve body 1 from the air inlet 32, flows into the valve body 1 along the flow guide cavity 33, after the coil 6 is electrified, the armature 10 moves upwards under the action of electromagnetic force to overcome the pretightening force of the main reset spring 7 and the auxiliary reset spring 8, the valve core 20 is driven to move upwards to be separated from the surface of the valve seat 31, at the moment, the air path is opened, the electromagnetic valve is opened, the air flows in a mixed air inlet mode of the axial main air groove 35 and the circumferential air filling hole 22, passes through the annular cavity 17, and finally flows vertically out from the air outlet 34; when the coil 6 is powered off, the electromagnetic force applied to the armature 10 disappears, the armature 10 moves downwards under the action of the return spring between the iron core and the spring seat 14 to drive the valve core 20 to move downwards until the surface of the valve core 20 is attached to the surface of the valve seat 31, the initial position is restored, the air passage is closed, and the electromagnetic valve is closed.
As shown in fig. 3, the present invention employs a floating valve seat 4 structure in order to prevent reverse leakage of fuel gas and to improve reliability and safety of the fuel gas injection valve. The floating valve seat 4 can lock the electromagnetic valve when the external air pressure and the internal air pressure of the electromagnetic valve are high, so that the reverse leakage of fuel gas is effectively prevented. The floating valve seat 4 is composed of 7 parts: the guide base 30, the valve seat 31, the valve seat return spring 28, the sealing rubber ring 27, the pressing gasket 24, the deformable sealing ring 25 and the elastic gasket 26. The guide base 30 is fixed to the valve body 1 by bolts, and the valve seat 31 is mounted on the guide base 30. The inner ring of the guide base 30 is provided with a T-shaped structure which is matched with the T-shaped structure of the outer ring of the valve seat 31. The two ends of the valve seat return spring 28 are respectively fixed on the valve seat 31 and the valve core 20, and a certain pretightening force is maintained.
In order to prevent air leakage between the valve seat 31 and the guide base 30, a dual air leakage preventing structure is additionally arranged between the valve seat 31 and the guide base 30, and a deformable sealing ring 25 is arranged above the joint of the valve seat 31 and the guide base 30, and the outer edge of the deformable sealing ring 25 is tightly pressed in the mounting groove on the guide base 30 and the valve body 1 and is fixed by the pretightening force of a bolt between the guide base 30 and the valve body 1. The pressing washer 24 is additionally arranged above the inner edge of the deformable sealing ring 25 and is fixed on the valve seat 31 through the screw 29, and the pressing washer 24 ensures uniform stress and enhances tightness. The deformable sealing ring 25 is made of deformable soft plastic, so that the movement of the valve seat 31 is not influenced. The second sealing is to install two layers of sealing rubber rings 27 at the T-shaped connection part of the valve seat 31 and the guide base 30, so that the sealing performance is further enhanced. A layer of elastic washer 26 is additionally arranged at the T-shaped connection position between the valve seat 31 and the guide base 30, so that vibration impact force during contact is reduced, and a damping effect is achieved. The reliability of the solenoid valve is effectively increased.
The valve seat 31 is acted upon by the valve seat return spring 28 elastic force F4, solenoid valve external gas pressures F1 and F2, solenoid valve internal gas pressure F3, and valve element 20 pressing force. The valve core 20 is acted by the elastic force of the return spring. When the solenoid valve lower air pressure is greater than the solenoid valve inner air pressure, solenoid valve outer air pressures F1, F2 act respectively under valve seat 31 and at air outlet annulus 18, the contact area under valve seat 31 is much greater than air outlet annulus 18, therefore F1 is much greater than F2, and the outer air pressure overcomes the spring preload of the return spring before the outer air pressure expands to cause upward movement of valve element 20, and valve seat 31 moves upward along with valve element 20. The valve seat 31 moves upward until the spring seat 14 contacts the electromagnet. At this time, even if the electromagnet is energized, the valve core 20 cannot move upward, and the solenoid valve cannot be opened. The solenoid valve is locked.
When the internal and external air pressures of the solenoid valve are restored to normal, the valve seat 31 moves downward to return to the original position by the valve seat return spring 28. If the electromagnet is electrified at this time, the valve core 20 still keeps still, and the electromagnetic valve is normally opened. When the solenoid valve is to be closed, the electromagnet is powered off, the valve core 20 moves downwards under the action of the return spring, and the solenoid valve is closed. If the solenoid is not energized at this time, the valve seat 31 moves downward with the valve spool 20 back to the original position by the return spring, and the solenoid valve remains closed. When the electromagnetic valve is required to be opened, the electromagnet is electrified, the valve core 20 moves upwards under the drive of the armature 10, and the electromagnetic valve is normally opened.
According to the working process, the through-type internal guide gas injection valve with the floating valve seat 4 adopts the structure with the floating valve seat 4, so that the reverse leakage of the gas injection valve can be effectively prevented under the condition that the internal and external air pressures of the injection valve are abnormal, the gas injection valve has a damping function, and the working reliability and safety of the gas injection valve are ensured; meanwhile, the pressure balance hole 12 is formed in the center of the guide pin 9, a certain number of pressure balance grooves 13 are formed in the bottom plate 16, so that the armature 10 is prevented from being subjected to axial force, the internal and external air path pressure at the armature 10 is more easily balanced, and the response speed of the armature 10 is improved; the four ribs 21 of the valve core 20 are provided with circumferential air supply holes 22, which increases the flow area, reduces the mass of the valve core 20 and improves the reliability. The flow guide cone angle with a certain angle is arranged at the circumferential air filling hole 22 of the valve core 20, so that the flow loss is reduced, and the flow coefficient is increased. The invention adopts a mixed air inlet mode of directly air inlet of the axial main air groove 35 and air inlet of the circumferential air-filling holes 22, increases the air inlet flow coefficient, increases the air inlet amount, can avoid air flow interference and ensures that the air paths reach balance. The jet efficiency of the engine is effectively improved.
The technical scheme of the invention is as follows: the straight-through internal guide gas injection valve with float valve seat consists of valve body, electromagnet, valve core assembly and float valve seat. The electromagnet is connected with the valve body through threads above the electromagnet. The electromagnet mainly comprises an iron core and a coil. Annular grooves for arranging a main reset spring are formed in two sides of the iron core, a straight groove with a certain depth is formed in the center of the iron core, and a guide pin between the iron core and the armature is arranged in the straight groove. The valve core assembly mainly comprises an armature, a spring seat, a fastening bolt, a gasket, a bottom plate and a valve core. The method is characterized in that: the armature, the gasket, the bottom plate and the valve core are linked together through a fastening bolt, the spring seat is arranged on the bottom plate, and a certain number of pressure balance grooves are formed in the bottom plate. The main reset spring is positioned between the iron core and the spring seat, the center of the guide pin is provided with a pressure balance hole, the guide pin and the armature are fixed together by using the clamp spring, and the auxiliary reset spring is positioned between the guide pin and the iron core. The rib of the valve core is provided with a plurality of circumferential air-filling holes respectively. The valve core and the valve seat adopt three air outlet ring belt structures, are sealed in surface and balanced in pressure stabilization, and have a wider ring belt area. The floating valve seat consists of a guide base, a valve seat reset spring, a sealing rubber ring, a pressing gasket, a deformable sealing ring and an elastic gasket. The method is characterized in that: the guide base is fixed on the valve body through bolts, and the valve seat is installed on the guide base. The guide base inner ring is provided with a T-shaped structure which is matched with the T-shaped structure of the valve seat outer ring. The two ends of the valve seat reset spring are respectively fixed on the valve seat and the valve core, and a certain pretightening force is maintained. The double air leakage preventing structure is additionally arranged between the valve seat and the guide base, the deformable sealing ring is arranged above the joint of the valve seat and the guide base, the outer edge of the deformable sealing ring is tightly pressed in the mounting groove on the guide base and the valve body, and the deformable sealing ring is fixed by the pretightening force of the bolt between the guide base and the valve body. The upper part of the inner edge of the deformable sealing ring is additionally provided with a pressing gasket which is fixed on the valve seat through a screw. The deformable sealing ring is made of deformable soft plastic, so that the movement of the valve seat is not influenced. The second double seal is that two layers of sealing rubber rings are additionally arranged at the T-shaped connection part of the valve seat and the guide base.
Claims (3)
1. A straight-through type internal guiding gas injection valve with a floating valve seat is characterized in that: the valve comprises a valve body, an electromagnet, a valve core assembly and a floating valve seat, wherein the electromagnet comprises an iron core, the iron core is fixed at the upper end of the valve body, a coil is wound in the iron core, and an annular groove is arranged in the iron core; the valve core assembly comprises an armature, a spring seat, a bottom plate and a valve core, wherein the armature, the bottom plate and the valve core are arranged from top to bottom and are simultaneously connected together through fastening bolts, the spring seat is positioned outside the armature and forms an annular groove with the armature, two ends of a main reset spring are respectively arranged in the annular groove of the iron core and the annular groove of the spring seat, a guide pin is arranged at the center of the armature and is fixed together through a clamp spring and the armature, the guide pin stretches into the iron core, an auxiliary reset spring is arranged in the iron core, two ends of the auxiliary reset spring are respectively contacted with the iron core and the guide pin, a pressure balance hole is arranged in the guide pin, a pressure balance groove is arranged on the bottom plate, the valve core is of a hollow structure, the pressure balance hole, the pressure balance groove and the hollow part of the valve core are communicated, a valve seat reset spring is arranged in the hollow part of the valve core, a sealing ring belt and a rib are arranged on the valve core, the sealing ring belt forms an annular cavity, the upper surface of the valve core is provided with an axial main air groove, and the rib is provided with a circumferential air supplementing hole; the floating valve seat comprises a guide base and a valve seat, wherein the guide base is fixed below the valve body, the valve seat is positioned below the valve core, a T-shaped structure is arranged on the inner ring of the guide base, the outer ring of the valve seat is arranged in the guide base through the T-shaped structure matched with the outer ring of the valve seat, two ends of a valve seat reset spring are respectively fixed on the valve seat and the valve core, an air outlet ring belt is arranged on the valve seat, the air outlet ring belt is positioned below the annular cavity, and an air outlet is arranged below the air outlet ring belt.
2. A straight-through, internally directed gas injection valve with a floating valve seat as defined in claim 1, wherein: the double air leakage preventing structure is arranged between the valve seat and the guide base, the deformable sealing ring is arranged above the joint of the valve seat and the guide base, the pressing gasket is additionally arranged above the inner edge of the deformable sealing ring, the two layers of sealing rubber rings are arranged at the joint of the T-shaped structure of the valve seat and the guide base, and the elastic gasket is arranged at the joint of the T-shaped structure of the valve seat and the guide base.
3. A straight-through, floating valve seat, internal pilot gas injection valve according to claim 1 or 2, characterized by: an air inlet is formed between the upper part of the iron core and the valve body, a flow guide cavity is formed between the middle lower part of the iron core and the valve body, and the air inlet is communicated with the flow guide cavity; the air flows into the valve body vertically from the air inlet, flows into the valve body along the flow guide cavity, and after the coil is electrified, the armature drives the valve core to move upwards to be separated from the surface of the valve seat, the air passage is opened, the electromagnetic valve is opened, the air flows in a mixed air inlet mode of the axial main air groove and the circumferential air-filling hole, and flows out vertically from the air outlet through the annular cavity; after the coil is powered off, under the action of a return spring between the iron core and the spring seat, the armature drives the valve core to move downwards until the surface of the valve core is attached to the surface of the valve seat, the initial position is restored, the air passage is closed, and the electromagnetic valve is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710504570.8A CN107131076B (en) | 2017-06-28 | 2017-06-28 | Straight-through type internal guide gas injection valve with floating valve seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710504570.8A CN107131076B (en) | 2017-06-28 | 2017-06-28 | Straight-through type internal guide gas injection valve with floating valve seat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107131076A CN107131076A (en) | 2017-09-05 |
| CN107131076B true CN107131076B (en) | 2023-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710504570.8A Active CN107131076B (en) | 2017-06-28 | 2017-06-28 | Straight-through type internal guide gas injection valve with floating valve seat |
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| CN (1) | CN107131076B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109654236A (en) * | 2019-01-30 | 2019-04-19 | 柳州源创电喷技术有限公司 | Long-life liquefied natural gas metering valve |
| CN113669161A (en) * | 2021-08-24 | 2021-11-19 | 中国航发贵阳发动机设计研究所 | Igniter with oxygen supplementing structure |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6431474B2 (en) * | 1999-05-26 | 2002-08-13 | Siemens Automotive Corporation | Compressed natural gas fuel injector having magnetic pole face flux director |
| DE102005043969B4 (en) * | 2005-09-15 | 2014-05-08 | Robert Bosch Gmbh | Valve device for controlling a fluid flow |
| DE102014208397A1 (en) * | 2014-05-06 | 2015-11-12 | Robert Bosch Gmbh | Valve for controlling a gaseous medium |
| CN106121867B (en) * | 2016-08-31 | 2019-08-20 | 重庆红江机械有限责任公司 | A kind of gaseous propellant engine fuel gas electric spray valve |
| CN206816391U (en) * | 2017-06-28 | 2017-12-29 | 哈尔滨工程大学 | A kind of interior guiding fuel gas injection valve of through type with floating valve seat |
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2017
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| Publication number | Publication date |
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| CN107131076A (en) | 2017-09-05 |
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