KR20170008101A - Fuel Injection Valve for Marine Diesel Engine and producing method thereof - Google Patents

Fuel Injection Valve for Marine Diesel Engine and producing method thereof Download PDF

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Publication number
KR20170008101A
KR20170008101A KR1020150099419A KR20150099419A KR20170008101A KR 20170008101 A KR20170008101 A KR 20170008101A KR 1020150099419 A KR1020150099419 A KR 1020150099419A KR 20150099419 A KR20150099419 A KR 20150099419A KR 20170008101 A KR20170008101 A KR 20170008101A
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KR
South Korea
Prior art keywords
sleeve
flange
injection valve
fuel injection
head portion
Prior art date
Application number
KR1020150099419A
Other languages
Korean (ko)
Inventor
김형권
Original Assignee
주식회사 윈윈인텍
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 윈윈인텍 filed Critical 주식회사 윈윈인텍
Priority to KR1020150099419A priority Critical patent/KR20170008101A/en
Publication of KR20170008101A publication Critical patent/KR20170008101A/en

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Classifications

    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/166—Selection of particular materials
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8061—Fuel injection apparatus manufacture, repair or assembly involving press-fit, i.e. interference or friction fit
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8084—Fuel injection apparatus manufacture, repair or assembly involving welding or soldering
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/90—Selection of particular materials
    • F02M2200/9053—Metals

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

The present invention relates to a fuel injection valve for a marine diesel engine, and more particularly, to a fuel injection valve for a marine diesel engine. More particularly, the present invention relates to a fuel injection valve for a marine diesel engine, It is possible to economical manufacture of injection valve, simple work process with few welding variables, no need for welding materials such as welding rod and spark during welding, harmful fume and flame are not generated, clean working environment, To a marine diesel engine fuel injection valve and a method of manufacturing the same.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel injection valve for a marine diesel engine,

The present invention relates to a fuel injection valve for a marine diesel engine, and more particularly, to a fuel injection valve for a marine diesel engine having an improved quality while reducing the consumption of expensive alloy steel by integrating different kinds of materials by friction welding .

Generally, a fuel injection valve for a marine diesel engine is a fuel injection valve in which an integral type, an alloy steel and a heat resistant alloy steel which are formed by molding an expensive alloy are required to have strength, corrosion resistance and abrasion resistance at high temperature, And a combination type made by joining by various joining processes after being made of materials have been widely used.

In recent years, high-quality integrated fuel injection valves of high-quality alloy steels have been mainly used in accordance with the speeding up and miniaturization of ships.

Such a monolithic fuel injection valve is required to have a monolithic facility because it is manufactured integrally with the head portion and the holder portion, and it has a problem that the manufacturing process is difficult due to the shortened sectional area of the head portion and the holder portion and the length of the holder portion. , There is a problem that the unit price of the product is increased because the equipment is lost.

Therefore, the portion exposed directly to the high-temperature and high-pressure gas, that is, the head portion is made of high-priced alloy steel, and the body sleeve is replaced by low-cost carbon steel, Development is required.

However, when general fusion bonding method is used to integrate the head part and the sleeve as different materials, a separate material such as a welding rod or a filler material is required, and harmful fumes or sparks are generated when the head part and the sleeve are welded, , The efficiency of the work is lowered, the quality is not standardized, and the reliability of the product is lowered.

Patent Registration No. 10-0957984 (2010. 05. 17.)

Accordingly, the present invention has been made to solve the above-described problems of the prior art, and it is an object of the present invention to provide a fuel injection valve for a marine diesel engine, which is constituted by dividing each constituent part by a different material, This makes it possible to economically manufacture the fuel injection valve by reducing the cost of the alloy steel by reducing consumption of alloy steel. The welding process is simple because the welding variable is small and unnecessary materials such as welding rod and materials are not needed during welding. The present invention is directed to a fuel injection valve for a marine diesel engine capable of uniformly producing a high quality product through automation, and a manufacturing method thereof.

In order to solve the problems of the above-mentioned invention, in the present invention, a head portion formed of an alloy steel (Cr-Mo), a sleeve formed of a structural carbon steel pipe (STKM), and a flange formed of an alloy steel Wherein the head portion, the sleeve, and the flange are joined to each other by flywheel-type friction welding. After the sleeve and the flange are brought into contact with each other, the frictional heat generated at the contact surface And the flanges are joined to each other by first friction welding to heat the surfaces of the flanges. After the head portions are brought into contact with the front ends of the sleeves integrated with the flanges, the frictional heat generated at the contact surfaces And the sleeve and the head are jointed to each other by secondary friction welding so that the joint surface is heated and pressed .

According to a specific means for solving the above-mentioned problems, the present invention can provide a fuel injection valve in which a heterogeneous material is integrated by friction welding by a flywheel system, whereby a large double metal material of 50 mm or more, that is, an alloy steel (Cr- It is possible to economically manufacture a large-sized fuel injection valve having excellent physical properties while drastically reducing the consumption amount of expensive alloy steel by bonding carbon steel pipe (STKM).

In addition, the rotational inertia moment energy is naturally converted into thermal energy, and the heat conduction of the material is suppressed to the maximum by the pressure welding, thereby narrowing the heat affected portion, maintaining the characteristic property of the material, simplifying the working process, to be.

In addition, it is possible to provide a uniform and high quality fuel injection valve through production automation.

1 is a perspective view showing a marine diesel engine fuel injection valve according to the present invention.
FIG. 2 is a schematic view showing the construction of a fuel injection valve for a marine diesel engine according to the present invention. FIG.
3 is a block diagram showing a manufacturing step of a marine diesel engine fuel injection valve of the present invention.
4 is a view showing a manufacturing method of a marine diesel engine fuel injection valve according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the accompanying drawings. However, these drawings are only for illustrating the contents and scope of the technical idea of the present invention, and the technical scope of the present invention is not limited or changed. It will be apparent to those of ordinary skill in the art that various changes and modifications can be made within the scope of the technical idea of the present invention based on these examples.

In addition, terms and words used in the present specification are terms selected in consideration of functions in the embodiments, and the meaning of the terms may be changed according to the intention or custom of the invention. Therefore, the terms used in the following embodiments are defined according to their definitions when they are specifically defined in this specification, and unless otherwise defined, they should be construed in a sense generally recognized by ordinary artisans.

1 is a perspective view showing a marine diesel engine fuel injection valve of the present invention.

The fuel injection valve for a marine diesel engine according to the present invention comprises a head portion 10 formed of an alloy steel (Cr-Mo), a sleeve 20 formed of a structural carbon steel pipe (STKM), a flange 30, and these components are integrally constituted by flywheel-type friction welding.

2, the head portion 10 as the front end portion and the flange 30 as the rear end portion are made of high-priced alloy steel having high physical properties, and the sleeve 20 as the stop portion is provided with the low- So that the sleeve 20 and the flange 30 are brought into contact with each other and the joint surface is heated by frictional heat generated on the contact surface by using the rotational moment of inertia while pressing the flange 30, The sleeve 20 and the flange 30 are integrally joined to each other and the head portion 10 is brought into contact with the front end of the sleeve 20 in which the flange is in pressure contact with the sleeve 20. Then, So as to constitute a fuel injection valve in which the sleeve 20 and the head portion 10 are integrally joined to each other.

The first friction welding is performed by a flywheel type friction welding in which a flange 30 is installed on a rotary shaft 2 of a flywheel and a sleeve 20 is installed on a fixed shaft 1 spaced from the rotary shaft 2, So that the rotational inertia moment energy necessary for the press-contact is generated, and the rotational inertia moment energy is naturally changed to the thermal energy through the friction between the materials, and at the same time, it is integrated through the pressure contact.

The secondary friction welding is performed by providing a sleeve 20 in which the flange 30 is integrated with the rotary shaft 2 and mounting the head portion 10 on the fixed shaft 1 and pressing the same by the same procedure as the primary friction welding Thereby constituting a fuel injection valve.

At this time, by suppressing the heat conduction of the material to the maximum through the pressure welding, the heat-affected portion can be narrow and the material-specific property can be maintained.

The conditions of friction welding were as follows: preheating pressure: 10 kg / cm 2, exothermic pressure: 75 kg / cm 2, upset pressure: 160 kg / Time: 20 sec.

As described above, according to the present invention, in constituting the fuel injection valve, each constituent part is divided and formed by different materials and integrated by friction welding, so that consumption of expensive alloy steel can be drastically reduced. And because welding process is simple, the work process is simple and eco-friendly work process is possible due to no need for welding materials (welding rod, materials, etc.) used in welding like melting welding method. Lt; / RTI >

Hereinafter, a method for manufacturing a marine diesel engine fuel injection valve of the present invention will be described.

FIG. 3 is a block diagram showing a manufacturing step of a marine diesel engine fuel injection valve according to the present invention, and FIG. 4 shows a method of manufacturing a marine diesel engine fuel injection valve according to the present invention.

1) Configuration part configuration step (S100)

The fuel injection valve is divided into a front end portion, a middle portion, and a rear end portion,

The front end portion is formed of an alloy steel with the head portion 10, the intermediate portion is formed of a structural carbon steel sleeve 20, and the rear end portion is formed by forming a flange 30 with an alloy steel.

The front, middle, and rear end configurations maximize the shape and functional capabilities of the product, optimize the design for friction welding, and maximize cost savings.

2) Friction welding step of the first sleeve and flange (S200)

The sleeve 20 and the flange 30 are brought into pressure contact with each other by friction welding.

That is, the flange 20 is provided on the rotary shaft 2 of the flywheel, and the sleeve 20 is installed on the fixed shaft 1 which is horizontally spaced apart from the rotary shaft 2.

Then, the flywheel is rotated to generate a rotational inertia moment energy necessary for press-contact, and the fixed shaft 1 is moved in the rotational axis direction to frictionally mutually exchange the rotational inertia moment energy with the thermal energy naturally And pressure welding is performed at the same time.

At this time, the conditions of the preheating pressure: 10 kg / cm ^ 2, the exothermic pressure: 75 kg / cm ^ 2, the upset pressure: 160 kg / As shown in Fig.

3) friction welding step between the secondary sleeve and the head (S300)

The head portion 1 is brought into pressure contact with the front end of the sleeve 20 in which the flange 30 is integrated by frictional welding.

That is, the sleeve 20 in which the flange 30 is integrated is provided on the rotary shaft 2 of the flywheel, and the head portion 10 is provided on the fixed shaft 1 which is horizontally spaced apart from the rotary shaft 2.

Then, the flywheel is rotated to press the head part 10 against the front end of the sleeve under the same conditions as the first friction welding step to form the fuel injection valve.

On the other hand, when the respective materials are frictionally welded in the first and second friction welding steps, the frictional contact portions deform and protrude convexly.

Therefore, after the friction welding, the deformed protrusions at the pressed portion are removed.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It should be understood that the scope of the claims is not limited to the examples but covers the scope of the claims and the scope of equivalents thereof.

10: head part 20: sleeve 30: flange
1: fixed shaft 2: rotary shaft

Claims (2)

A head portion 10 formed of an alloy steel (Cr-Mo), a sleeve 20 formed of a structural carbon steel pipe (STKM), and a flange 30 formed of an alloy steel (Cr-Mo)
The head portion 10, the sleeve 20, and the flange 30 are integrally joined by flywheel friction welding,
After the sleeve 20 and the flange 30 are brought into contact with each other, the flange 30 is subjected to primary friction welding so as to press the flange 30 to heat the joint surface with the frictional heat generated at the contact surface using the rotational inertia moment energy, And the flange 30 are joined together,
After the head portion 10 is brought into contact with the front end of the sleeve 20 integrated with the flange 30, the joint surface is heated by the frictional heat generated at the contact surface by using the rotational inertia moment energy while pressing the sleeve 20 And the sleeve (20) and the head part (10) are joined to each other by secondary friction welding so as to be in pressure contact with each other.
(S100) of forming a head portion (10) by an alloy steel at the front end portion, a sleeve (20) by a structural carbon steel, and a flange (30) by an alloy steel at a rear end portion;
A flange (30) is provided on a rotary shaft (2) of a flywheel and a sleeve (20) is provided on a fixed shaft (1) spaced horizontally on the rotary shaft (2). The rotary inertia Energy is generated and the fixed shaft is moved in the direction of the rotating shaft to mutually friction between the flange and the sleeve 20 to naturally change the rotational inertia moment energy into thermal energy and at the same time pressure welding is carried out so that the preheating pressure is 10 kg / cm ^ Friction welding step of primary sleeve and flange subjected to friction welding under conditions of: 75 kg / cm ^ 2, upset pressure: 160 kg / cm ^ 2, number of revolutions: 1600 rpm, heating time: 189 sec, (S200);
A head portion 10 is provided on a fixed shaft 1 spaced horizontally from a rotary shaft 2 and a sleeve 20 having a flange 30 integrated with the rotary shaft 2 of the flywheel is provided, (S300) between a head portion and a secondary sleeve for pressing the head portion (10) against the front end of the sleeve (20) under the same conditions as the primary friction welding step to form the fuel injection valve (Method for manufacturing a diesel engine fuel injection valve).
KR1020150099419A 2015-07-13 2015-07-13 Fuel Injection Valve for Marine Diesel Engine and producing method thereof KR20170008101A (en)

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KR1020150099419A KR20170008101A (en) 2015-07-13 2015-07-13 Fuel Injection Valve for Marine Diesel Engine and producing method thereof

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KR1020150099419A KR20170008101A (en) 2015-07-13 2015-07-13 Fuel Injection Valve for Marine Diesel Engine and producing method thereof

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102124340B1 (en) 2018-12-21 2020-06-18 주식회사 티에스피 Lapping apparatus of barrel and plunger of fuel injector valve for vessel engine
KR20230081793A (en) * 2021-11-29 2023-06-08 한국생산기술연구원 Dissimilar metal friction welding material and dissimilar metal friction bonding method for preventing galvanic corrosion

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100957984B1 (en) 2008-01-22 2010-05-17 현대중공업 주식회사 Friction welding process of Two-stroke Diesel engine turbocharger rotor shaft

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100957984B1 (en) 2008-01-22 2010-05-17 현대중공업 주식회사 Friction welding process of Two-stroke Diesel engine turbocharger rotor shaft

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102124340B1 (en) 2018-12-21 2020-06-18 주식회사 티에스피 Lapping apparatus of barrel and plunger of fuel injector valve for vessel engine
KR20230081793A (en) * 2021-11-29 2023-06-08 한국생산기술연구원 Dissimilar metal friction welding material and dissimilar metal friction bonding method for preventing galvanic corrosion

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