KR20110105547A - The vessel engine piston skirt which becomes molybdenum coating - Google Patents

The vessel engine piston skirt which becomes molybdenum coating Download PDF

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Publication number
KR20110105547A
KR20110105547A KR1020100024748A KR20100024748A KR20110105547A KR 20110105547 A KR20110105547 A KR 20110105547A KR 1020100024748 A KR1020100024748 A KR 1020100024748A KR 20100024748 A KR20100024748 A KR 20100024748A KR 20110105547 A KR20110105547 A KR 20110105547A
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KR
South Korea
Prior art keywords
piston skirt
molybdenum
coating
engine piston
molybdenum coating
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KR1020100024748A
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Korean (ko)
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박남기
윤갑식
송상재
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현대중공업 주식회사
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Priority to KR1020100024748A priority Critical patent/KR20110105547A/en
Publication of KR20110105547A publication Critical patent/KR20110105547A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/10Making specific metal objects by operations not covered by a single other subclass or a group in this subclass pistons
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00Pistons 
    • F02F3/10Pistons  having surface coverings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J1/00Pistons; Trunk pistons; Plungers
    • F16J1/01Pistons; Trunk pistons; Plungers characterised by the use of particular materials

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

본 발명은 선박엔진 피스톤 스커트에 관한 것으로서, 더욱 상세하게는 피스톤 스커트의 운전시 운전상태를 양호하게 유지하고 피스톤 스커트의 운동면의 마모를 막기 위하여 피스톤 스커트의 외면을 화염용사 몰리브덴 코팅을 함으로써 이물질에 의한 마모방지 및 운동성 향상을 위한 몰리브덴 코팅된 선박엔진 피스톤 스커트에 관한 것이다. The present invention relates to a marine engine piston skirt, and more particularly, to the foreign matter by applying a flame sprayed molybdenum coating on the outer surface of the piston skirt in order to maintain a good operating state during operation of the piston skirt and to prevent wear of the movement surface of the piston skirt. The present invention relates to a molybdenum-coated marine engine piston skirt for preventing wear and improving mobility.

Description

몰리브덴 코팅된 선박엔진 피스톤 스커트{The vessel engine piston skirt which becomes molybdenum coating}The vessel engine piston skirt which becomes molybdenum coating}

본 발명은 선박엔진 피스톤 스커트에 관한 것으로서, 더욱 상세하게는 피스톤 스커트의 운전시 운전상태를 양호하게 유지하고 피스톤 스커트의 운동면의 마모를 막기 위하여 피스톤 스커트의 외면을 화염용사 몰리브덴 코팅을 함으로써 이물질에 의한 마모방지 및 운동성 향상을 위한 몰리브덴 코팅된 선박엔진 피스톤 스커트에 관한 것이다.
The present invention relates to a marine engine piston skirt, and more particularly to the foreign matter by the flame spray molybdenum coating on the outer surface of the piston skirt in order to maintain a good operating state during operation of the piston skirt and to prevent wear of the movement surface of the piston skirt. The present invention relates to a molybdenum-coated marine engine piston skirt for preventing wear and improving mobility.

기존 선박엔진에서는 실린더 라이너와 피스톤 스커트간의 원활한 운동을 위하여 피스톤 스커트에 구리합금 링을 압입 사용하여 초기 운전 시의 원만한 길들이기 운전 목적이나, 경질의 이물질이 구리합금 링에 함몰되어 라이너의 스크래치 발생 원인이 되는 경우나, 일정 운전 시간이 지난 후에 구리합금 링이 마모되어 기능을 상실하는 등의 문제로 실린더 라이너의 운전 상태가 악화되는 경우가 있었다.
In existing ship engines, copper alloy rings are press-fitted to the piston skirts for smooth movement between the cylinder liner and the piston skirt. For the purpose of smooth running during initial operation, the hard foreign matters are embedded in the copper alloy rings, causing the liner to be scratched. In some cases, the operation condition of the cylinder liner may deteriorate due to problems such as wear of the copper alloy ring and a loss of function after a certain operation time.

본 발명은 이와 같은 종래의 제반 문제점을 해소하기 위하여 안출한 것으로, 피스톤 스커트 운동면(외면)에 화염용사를 이용한 몰리브덴 코팅 방법을 적용하여 피스톤 스커트가 지속적인 실린더 라이너와의 윤활 작용을 통하여 실린더 운전 상태를 양호하게 유지하고자 하는 몰리브덴 코팅된 선박엔진 피스톤 스커트를 제공하는데 그 목적이 있다.
The present invention has been made to solve such a conventional problem, the cylinder operating state by applying the molybdenum coating method using flame spraying on the piston skirt movement surface (outer surface) through the continuous lubrication of the cylinder liner It is an object of the present invention to provide a molybdenum coated marine engine piston skirt which is intended to maintain good quality.

상기한 목적을 달성하기 위한 본 발명은 피스톤 스커트를 예열하는 단계; 예열된 피스톤 스커트의 외면(10)을 블라스팅하는 단계; 블라스팅이 끝난 후 화염용사를 이용하여 몰리브덴 코팅을 하는 단계를 포함하는 것을 특징으로 한다. The present invention for achieving the above object comprises the steps of preheating the piston skirt; Blasting the outer surface 10 of the preheated piston skirt; After blasting is characterized in that it comprises the step of molybdenum coating using a flame spray.

한편, 상기 화염용사를 이용한 몰리브텐 코팅의 두께는 0.30mm ~0.35mm 로 코팅하는 것을 특징으로 한다.
On the other hand, the thickness of the molybdenum coating using the flame spray is characterized in that the coating to 0.30mm ~ 0.35mm.

상기와 같이 본 발명은 기존의 구리합금 링 설계에서 몰리브덴 코팅의 적용으로 인하여 이물질에 의한 라이너의 스크래치 방지 및 몰리브덴 코팅의 윤활 기능이 장기간 적용되므로 안정적인 실린더 운전 상태가 가능한 이점이 있다.
As described above, the present invention has an advantage in that stable cylinder operation is possible because the lubrication function of the molybdenum coating and the scratch prevention of the liner by foreign substances are applied due to the application of the molybdenum coating in the existing copper alloy ring design.

도 1 은 선박의 선박엔진 피스톤 스커트를 보여주는 평면도 및 단면도,
도 2 는 선박엔진 피스톤 스커트의 몰리브텐 코팅 면을 보여주는 단면도,
도 3 은 본 발명인 몰리브덴 코팅된 선박엔진 피스톤 스커트의 예열과정을 나타낸 사진,
도 4 는 본 발명인 몰리브덴 코팅된 선박엔진 피스톤 스커트의 블라스팅 과정을 나타낸 사진
도 5 는 본 발명인 몰리브덴 코팅된 선박엔진 피스톤 스커트의 화염용사 몰리브텐 코팅과정을 나타낸 사진.
1 is a plan view and a cross-sectional view showing a marine engine piston skirt of a vessel,
2 is a cross-sectional view showing a molybdenum coated surface of the marine engine piston skirt,
Figure 3 is a photograph showing the preheating process of the present inventors molybdenum coated marine engine piston skirt,
Figure 4 is a photograph showing the blasting process of the present inventors molybdenum coated marine engine piston skirt
Figure 5 is a photograph showing the flame spray molybdenum coating process of the present inventors molybdenum-coated marine engine piston skirt.

이하, 첨부된 도면을 참조하여 본 발명에 따른 바람직한 실시 예를 상세히 설명하면 다음과 같다. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 2 에 나타난 피스톤 스커트의 외면(10)에 몰리브덴 코팅을 하는 것으로, 본 발명은 도 2 에 나타나 있는 피스톤 스커트의 외면(10)에 몰리브덴 코팅을 하기 위하여 피스톤 스커트를 예열하는 단계(S1); 예열된 피스톤 스커트의 외면(10)을 블라스팅하는 단계(S2); 블라스팅이 끝난 후 화염용사를 이용하여 몰리브덴 코팅을 하는 단계(S3)를 포함한다. By applying a molybdenum coating on the outer surface 10 of the piston skirt shown in FIG. 2, the present invention includes the steps of preheating the piston skirt for molybdenum coating on the outer surface 10 of the piston skirt shown in FIG. 2; Blasting the outer surface 10 of the preheated piston skirt (S2); After blasting is finished using a flame spraying molybdenum coating step (S3).

상기 코팅단계는 도 3, 4, 5 에 나타나 있다. The coating step is shown in Figures 3, 4, 5.

피스톤 스커트를 예열하는 단계는 피스톤 스커트에 몰리브덴 코팅을 하기 위하여 피스톤 스커트에 열을 가하여 코팅이 잘 이루어지도록 하기 위한 단계이다. The step of preheating the piston skirt is a step for applying a heat to the piston skirt for the molybdenum coating on the piston skirt to ensure a good coating.

예열된 피스톤 스커트의 외면(10)을 블라스팅하는 단계는 예열된 피스톤 스커트의 외면을 블라스팅을 통하여 깨끗하게 하는 단계이다. Blasting the outer surface 10 of the preheated piston skirt is to clean the outer surface of the preheated piston skirt through blasting.

상기와 같이 블라스팅이 끝나면 화염용사를 이용하여 몰리브덴 코팅을 하는 단계를 통하여 피스톤 스커트의 외면을 몰리브덴 코팅하는 것이다. After blasting as described above, the molybdenum coating on the outer surface of the piston skirt through the step of molybdenum coating using a flame spray.

상기 화염용사는 모재에 열변형 없이 코팅할 수 있는 냉간코팅기술로서, 몰리브댄 코팅재료를 화염 속으로 이송 용융시킨 후 모재에 고속으로 분사 충돌시켜 코팅을 형성하는 표면처리 기술로 코팅의 두께조절이 용이하고, 코팅도중 모재의 열변형이 없어 피스톤 스커트의 외면에 일정한 두께로 몰리브덴을 코팅할 수 있는 것이다. The flame spraying is a cold coating technology that can be coated on the base material without thermal deformation. The thickness of the coating is controlled by a surface treatment technology which forms a coating by spraying molybdenum coating material into the flame and then spraying it on the base material at high speed. This is easy, and there is no thermal deformation of the base material during the coating, it is possible to coat the molybdenum with a constant thickness on the outer surface of the piston skirt.

상기와 같이 화염용사 몰리브덴 코팅을 위하여 피스톤 스커트의 예열은 110±10℃ 하는 것이 바람직하며, 블라스팅은 Al2O3 particle size-0.5~1 mm를 사용하는 것이 바람직하다. For the thermal spray molybdenum coating as described above, the preheating of the piston skirt is preferably 110 ± 10 ℃, blasting is preferably used Al 2 O 3 particle size-0.5 ~ 1 mm.

한편, 상기 화염용사를 이용한 몰리브텐 코팅의 두께는 0.30mm ~0.35mm 로 코팅하는 것이 바람직하다. On the other hand, the molybdenum coating using the flame spray is preferably coated with 0.30mm ~ 0.35mm.

상기 실시예와 같이 코팅을 진행할 경우 경도는 Micro에서 707.2 HmV이상, Standard에서 382.2 HV이상이며, 기공은 6.51%, 접합강도-20 Kg 하중에 견디도록 하여 최상의 코팅이 가능하다. When the coating is carried out as in the above embodiment, the hardness is 707.2 HmV or more in the micro, 382.2 HV or more in the standard, the porosity is 6.51%, bond strength-20 Kg load to the best coating is possible.

상기와 같이 피스톤 스커트에 몰리브덴을 화염용사를 사용하여 코팅함으로써 피스톤 스커트가 지속적인 실린더 라이너와 윤활 작용을 할 수 있도록 하여 실린더의 운전상태를 양호하게 유지할 수 있도록 하는 것이다. As described above, the molybdenum is coated on the piston skirt using a flame spray so that the piston skirt can be continuously lubricated with the cylinder liner to maintain a good operating state of the cylinder.

상술한 실시 예는 본 발명의 가장 바람직한 예에 대하여 설명한 것이지만, 상기 실시 예에만 한정되는 것은 아니며, 본 발명의 기술사상을 벗어나지 않는 범위 내에서 다양한 변형이 가능하다는 것은 당업자에게 있어서 명백한 것이다.
It should be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

1 : 피스톤 스커트
10 : 피스톤 스커트 외면
1: piston skirt
10: piston skirt outer surface

Claims (2)

피스톤 스커트(1)를 예열하는 단계;
예열된 피스톤 스커트의 외면(10)을 블라스팅하는 단계;
블라스팅이 끝난 후 화염용사를 이용하여 피스톤 스커트의 외면(10)에 몰리브덴 코팅을 하는 단계를 포함하여 이루어지는 특징으로 하는 몰리브덴 코팅된 선박엔진 피스톤 스커트.
Preheating the piston skirt 1;
Blasting the outer surface 10 of the preheated piston skirt;
Molybdenum-coated marine engine piston skirt comprising the step of applying molybdenum coating on the outer surface 10 of the piston skirt using the flame spray after the blasting.
청구항 1 에 있어서,
상기 화염용사를 이용한 몰리브텐 코팅의 두께는 0.30mm ~0.35mm 로 코팅하는 것을 특징으로 하는 몰리브덴 코팅된 선박엔진 피스톤 스커트.







The method according to claim 1,
Molybdenum coated marine engine piston skirt, characterized in that the coating of the molybdenum coating using the flame spray is 0.30mm ~ 0.35mm.







KR1020100024748A 2010-03-19 2010-03-19 The vessel engine piston skirt which becomes molybdenum coating KR20110105547A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013129825A1 (en) 2012-02-28 2013-09-06 인텔 코오퍼레이션 Method and device for notification of facial recognition environment, and computer-readable recording medium for executing method
WO2013180320A1 (en) 2012-05-31 2013-12-05 인텔 코오퍼레이션 Method, server, and computer-readable recording medium for providing augmented reality service
KR20160053412A (en) * 2014-11-04 2016-05-13 현대중공업 주식회사 Coating material for piston-skirt and coating method for piston-skirt using the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013129825A1 (en) 2012-02-28 2013-09-06 인텔 코오퍼레이션 Method and device for notification of facial recognition environment, and computer-readable recording medium for executing method
WO2013180320A1 (en) 2012-05-31 2013-12-05 인텔 코오퍼레이션 Method, server, and computer-readable recording medium for providing augmented reality service
KR20160053412A (en) * 2014-11-04 2016-05-13 현대중공업 주식회사 Coating material for piston-skirt and coating method for piston-skirt using the same

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