CN103717924B - 水中滑动部件及水中滑动部件的制造方法、以及水力机械 - Google Patents
水中滑动部件及水中滑动部件的制造方法、以及水力机械 Download PDFInfo
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- CN103717924B CN103717924B CN201280038534.2A CN201280038534A CN103717924B CN 103717924 B CN103717924 B CN 103717924B CN 201280038534 A CN201280038534 A CN 201280038534A CN 103717924 B CN103717924 B CN 103717924B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/20—Sliding surface consisting mainly of plastics
- F16C33/208—Methods of manufacture, e.g. shaping, applying coatings
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- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/001—Interlayers, transition pieces for metallurgical bonding of workpieces
- B23K35/004—Interlayers, transition pieces for metallurgical bonding of workpieces at least one of the workpieces being of a metal of the iron group
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- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/302—Cu as the principal constituent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/013—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium
- B32B15/015—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium the said other metal being copper or nickel or an alloy thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B15/00—Layered products comprising a layer of metal
- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
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- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
- B32B27/322—Layered products comprising a layer of synthetic resin comprising polyolefins comprising halogenated polyolefins, e.g. PTFE
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/06—Bearing arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
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- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
- F04D29/047—Bearings hydrostatic; hydrodynamic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/12—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load
- F16C17/14—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load specially adapted for operating in water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
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- F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
- F16C33/122—Multilayer structures of sleeves, washers or liners
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- F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
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- F16C33/02—Parts of sliding-contact bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
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- F16C2208/02—Plastics; Synthetic resins, e.g. rubbers comprising fillers, fibres
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- F16C2223/44—Coating surfaces by casting molten material on the substrate
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- F16C2380/00—Electrical apparatus
- F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Fluid Mechanics (AREA)
- Manufacturing & Machinery (AREA)
- Sliding-Contact Bearings (AREA)
- Laminated Bodies (AREA)
- Details Of Reciprocating Pumps (AREA)
- Hydraulic Turbines (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
在水中环境中长时间使用的情况下,也抑制机械特性随时间经过而劣化。实施方式的水中滑动部件是在水中使用的水中滑动部件,具备:基材(11),由第1金属材料构成;多孔质构造的中间层(12),接合在上述基材(11)上,由第2金属材料构成;腐蚀防止层(122),一部分熔融而填充到上述中间层(12)的多孔质构造的空孔内;切断滑动层(13),形成在上述腐蚀防止层(122)上,由树脂材料构成。
Description
技术领域
本发明的实施方式涉及水中滑动部件及水中滑动部件的制造方法、以及水力机械。
背景技术
一般而言,水力发电机的滑动部件用油润滑,但因为由油的流出带来的河流污染的环境问题而要求水润滑轴承的应用。
水润滑轴承的滑动部件被公开了具有由金属材料构成的基材、接合在该基材上、由金属材料构成的多孔质构造的中间层、和形成在该中间层上的由树脂材料构成的滑动层的结构。
现有技术文献
专利文献
专利文献1:日本特开平10-29256号公报
发明概要
发明要解决的技术问题
滑动部件的中间层将由金属材料构成的多个球状部件在基材的主面上与该主面结合而形成,构成多孔质构造。由多个球状部件构成的多孔质构造的空孔的形状是各向异性的。
在使滑动层的树脂材料向空孔内填充的情况下,填充到空孔内的角落是困难的,有在空孔内没有被填充树脂材料的部分残留而作为间隙的情况。
在水中环境中,如果在中间层的多孔质构造的空孔内存在没有被填充树脂材料的部分(间隙),则水进入到间隙中,以间隙为起点而发生腐蚀(间隙腐蚀)。由于间隙腐蚀,在将滑动部件(轴承部件)在水中长时间使用的情况下,有机械特性随时间经过而劣化的问题。
发明内容
本发明要解决的技术问题是提供一种即使在水中环境中长时间使用的情况下、也能够抑制机械特性随时间经过而劣化的水中滑动部件及水中滑动部件的制造方法、以及水力机械。
用于解决技术问题的手段
实施方式的水中滑动部件,是在水中使用的水中滑动部件,具备:基材,由第1金属材料构成;多孔质构造的中间层,接合在上述基材上,由第2金属材料构成;腐蚀防止层,一部分熔融而填充到上述中间层的多孔质构造的空孔内;滑动层,形成在上述腐蚀防止层上,由树脂材料构成。
附图说明
图1是表示第1实施方式的水中滑动部件的概略结构的外观图。
图2是表示第1实施方式的水中滑动部件的概略结构的剖视图。
图3是第1实施方式的水中滑动部件的制造方法的工序图。
图4是第1实施方式的水中滑动部件的制造方法的工序图。
图5是第1实施方式的水中滑动部件的制造方法的工序图。
图6是第1实施方式的水中滑动部件的制造方法的工序图。
图7是表示第2实施方式的水中滑动部件的概略结构的剖视图。
图8是第2实施方式的水中滑动部件的制造方法的工序图。
图9是第2实施方式的水中滑动部件的制造方法的工序图。
具体实施方式
(第1实施方式)
图1是表示本实施方式的水中滑动部件的概略结构的外观图,图2是表示本实施方式的水中滑动部件的概略结构的剖视图。
如图1及图2所示,本实施方式的水中滑动部件(以下,有时简称作“滑动部件”)10具有:由第1金属材料构成的基材11;接合在该基材11上,由第2金属材料构成的多孔质构造的中间层12;至少形成在中间层12上,具有电绝缘性的腐蚀防止层122(腐蚀电流切断层);和至少形成在腐蚀防止层122上,由包括导电性的填充件在内的树脂材料构成,树脂材料的一部分被填充到中间层的多孔质构造的空孔内的滑动层13。
从机械特性提高的观点考虑,滑动层13的树脂材料含有碳纤维等导电性的填充件。另外,在图1中,由标号15表示的部件表示滑动部件10滑动的轴的滑动面,由此,本实施方式的滑动部件10作为轴承发挥功能。
中间层12是将由第2金属材料构成的多个球状部件121在基材11的主面11A上与该主面11A结合而形成的。中间层12通过多个球状部件121沿着基材11的主面11A、经由第1空孔121A排列,而构成多孔质构造。另外,多个球状部件121的对于基材11的主面11A的结合例如可以通过以下说明的使用焊料的方法(钎焊接合法)或固相扩散接合法进行。球状部件121的一部分或全部可以是纤维状部件。
根据图1及图2可知,在由多个球状部件121构成的多孔质构造中,第1空孔121A的形状是各向异性的。在使滑动层13的树脂材料向第1空孔121A内填充的情况下,难以填充到第1空孔121A内的角落,有在第1空孔121A内没有被填充树脂材料的部分作为间隙而残留的情况。
腐蚀防止层122将基材11的主面11A及多个球状部件121的表面覆盖。腐蚀防止层122在是熔点比滑动层13的树脂材料低的材料的情况下,进入到在第1空孔121A内没有被滑动层13的树脂材料填充的部分(间隙)中,将间隙填充。
滑动层13形成在腐蚀防止层122上。滑动层13的一部分进入到在将中间层12的第1空孔121A用腐蚀防止层122覆盖后形成的第2空孔122A内,填充到第2空孔122A中。
本实施方式的水中滑动部件形成有腐蚀防止层122,以将基材11的主面11A及多个球状部件121的表面覆盖。因此,在滑动层13的树脂材料包含碳纤维等导电性的填充件的情况下,也能够在水中环境中将从轴15经过滑动部件10向轴承基材流动的腐蚀电流切断,能够防止轴的腐蚀。
此外,如果在作为多孔质构造的中间层12具备的第1空孔121A内存在没有被填充滑动层13的树脂材料的部分(间隙),则在水中环境中,水进入到该间隙中。因此,以间隙为起点发生腐蚀(间隙腐蚀)。
但是,在本实施方式中,形成腐蚀防止层122,以将基材11的主面11A及多个球状部件121的表面覆盖。因此,能够抑制在第1空孔121A内产生间隙,由此能够抑制间隙腐蚀。结果,在将滑动部件10(轴承部件)在水中长时间使用的情况下,也能够抑制机械特性随时间经过而劣化。
这样,根据本实施方式,在将滑动部件10在水中长时间使用的情况下,也能够通过将从轴15经过滑动部件10向轴承基材流动的腐蚀电流切断来防止轴的腐蚀,并且能够持续长期呈现较高的机械特性。
基材11可以通过耐腐蚀性及机械特性良好的、由铁及铬构成的不锈钢、由铁、铬及镍构成的不锈钢、以及由铁、铬、镍、钼、锰、硅、铌及钛构成的不锈钢构成。
构成中间层12的球状部件121也与基材11同样,可以通过耐腐蚀性及机械特性良好的、由铁及铬构成的不锈钢、由铁、铬及镍构成的不锈钢、以及由铁、铬、镍、钼、锰、硅、铌及钛构成的不锈钢构成。
腐蚀防止层122只要具有电绝缘性,则由怎样的材料构成都可以。但是,因为以下说明的制造方法,优选的是通过熔点低的氟树脂、特别是全氟乙烯树脂(熔点300~310℃)、四氟乙烯-六氟乙烯共聚物(熔点260℃)构成腐蚀防止层122。另外,在这些树脂及共聚物中,根据需要可以含有树脂类、陶瓷类、金属类的填充件、例如含有晶须或纤维、颗粒状的填充件。
滑动层13可以由规定的树脂材料构成。例如可以使用四氟乙烯树脂(熔点327℃)、全氟乙烯类树脂(熔点300~310℃)、六氟丙烯树脂(熔点260℃)、聚醚醚酮树脂(熔点334℃)、聚苯硫醚树脂(熔点280℃)等。四氟乙烯树脂等氟类树脂虽然摩擦系数较低,但机械特性稍低。另一方面,聚醚醚酮树脂等树脂虽然摩擦系数较高,但机械特性也较高。因而,需要适当考虑对滑动层13即滑动部件10要求的特性而选择最适当的材料。
但是,如本实施方式所示,在使用滑动部件10作为轴承部件的情况下,滑动部件10的机械特性由基材11在某种程度上确保。因此,滑动层13主要优选的是摩擦系数较低、滑动特性良好。因而,在上述材料中也优选的是氟类树脂、特别是四氟乙烯树脂。另外,这些树脂材料从机械特性提高的观点考虑,含有晶须或纤维、颗粒等的填充件。
树脂材料中含有的填充件包括由含有碳及石墨的至少一方的纤维及颗粒构成的填充件,进而包括由钛酸钾、硼酸铝及氧化锌的至少一种的晶须、纤维及颗粒构成的追加的填充件。这些填充件特别在滑动的对方部件由不锈钢等构成的情况下,不会使对方部件磨损或损伤,能够具有较高的耐磨损性。
接着,对本实施方式的滑动部件10的制造方法进行说明。图3~图6是表示滑动部件10的制造方法的一例的工序图。另外,图3~图6与图2所示的滑动部件10的剖视图关联,是表示滑动部件10的制造过程中的各工序的状态的图。
最初,如图3所示,准备模具17,在该模具17内配置基材11,向基材11的主面11A上涂敷未图示的焊料。接着,在基材11的主面11A上,以规定的间距配置多个球状部件121,并且将基材11及球状部件121、以及焊料在减压环境下加热,使焊料熔融。然后,通过冷却,将多个球状部件121经由焊料结合到基材11的主面11A上(钎焊接合法)。这样,形成多孔质构造的中间层12。
另外,也可以代替使用焊料,而通过由固相扩散接合法使多个球状部件121对基材11的主面11A直接结合,形成多孔质构造的中间层12。
接着,预先使氟树脂等原料粉末溶解或分散到有机溶剂中,准备溶液或分散液。并且,通过使结合了多个球状部件121的基材11含浸在该溶液或分散液中,将溶液或分散液涂敷到基材11的主面11A及多个球状部件121的表面上之后进行干燥。这样,使上述原料粉末附着到基材11的主面11A及多个球状部件121上。然后,通过将上述原料粉末加热而进行熔融处理,形成腐蚀防止层122。
另外,原料粉末的加热熔融处理可以在以下说明的形成滑动层13时的烧制的工序中同时进行。在此情况下,由于不需要另外设置形成腐蚀防止层122的情况下的工序,所以能够使滑动部件10的制造工序简略化。
接着,如图4所示,使作为滑动层13的原料粉末的四氟乙烯树脂等原料粉末13X分散配置到内包有多个球状部件121的腐蚀防止层122上。并且,在该分散配置的原料粉末13X上配置无纺布16及压力传递介质18。另外,无纺布16及压力传递介质18是用来在之后使用上冲头(日语:上パンチ)进行压缩成型时使该上冲头的脱模性提高的。因此,作为压力传递介质18,优选的是由摩擦系数低的氟类树脂、特别是四氟乙烯树脂的粉末构成。
另外,在该工序中,将原料粉末13X的一部分填充到被腐蚀防止层122覆盖后形成的第2空孔122A中。
接着,如图5所示,经由无纺布16及压力传递介质18,使用上冲头19将原料粉末13X压缩成型,并在规定的温度下加热而烧制原料粉末13X,形成滑动层13。另外,如上述那样,在图5所示的工序中,也可以在与将原料粉末X烧制时同时将腐蚀防止层122的原料粉末加热熔融处理,形成该腐蚀防止层122。
上述加热温度在将原料粉末13X由如四氟乙烯树脂等那样低熔点的氟类树脂构成的情况下设定为400℃以下的温度。此外,在图5所示的工序中,也可以使腐蚀防止层122的原料粉末如上述那样为全氟乙烯树脂等,与上述同样在400℃以下的温度下加热。通过这样,能够在与原料粉末13X的烧制同时进行加热熔融处理,能够形成作为目的的腐蚀防止层122。
另外,在该工序中,原料粉末13X被充分填充到中间层12的多孔质构造的第2空孔122A内。此时,即使在第2空孔122A内发生间隙,也如上述那样,通过腐蚀防止层122,在生成第1空孔121A的间隙那样的部位预先形成腐蚀防止层122而将该间隙埋设。因此,能够抑制作为间隙腐蚀的原因的间隙的生成。
接着,如图6所示,在将上冲头19开放后,将无纺布16及压力传递介质18除去,从而能够得到图1及图2所示那样的作为目的的滑动部件10。
在上述例子中,在模具17内在基材11上形成了中间层12,但并不限定于此。也可以在模具17外,在基材11上预先形成中间层12后,在图4中说明的形成滑动层13的阶段中,将包括基材11及中间层12在内的装配体配置到模具17内。
另外,本实施方式的滑动部件10(轴承部件)例如可以作为水车、水车发电机、泵等的水力机械的滑动部件(轴承部件)而适当地使用。
(第2实施方式)
图7是表示本实施方式的水中滑动部件的概略结构的剖视图。另外,本实施方式的水中滑动部件的外观图与第1实施方式的图1所示的形态是同样的。
如图7所示,本实施方式的水中滑动部件(以下,有时简称作“滑动部件”)20的中间层22的结构与图2所示的第1实施方式的中间层12的结构不同,关于其他结构是同样的。因此,以中间层22的构造为中心进行说明。另外,对于与图1及图2所示的构成要素相同或类似的构成要素使用相同的标号。
如图7所示,本实施方式的滑动部件20具有:由第1金属材料构成的基材11;接合在该基材11上,由第2金属材料构成的多孔质构造的中间层22;至少形成在中间层22上,具有电绝缘性的腐蚀防止层122;和至少形成在腐蚀防止层122上,由包含导电性的填充件的树脂材料构成,树脂材料的一部分被填充到中间层22的多孔质构造的空孔内的滑动层13。该树脂材料从机械特性提高的观点考虑,含有碳纤维等导电性的填充件。另外,本实施方式的滑动部件20也与第1实施方式的滑动部件10同样,能够作为轴承发挥功能。
中间层22由第2金属材料构成,构成了多孔质构造。在本实施方式中,中间层22在基材11的主面11A上形成有多个沿着厚度方向的截面例如是T字型的楔型部件221,该多个楔型部件221与主面11A结合而构成多孔质构造。中间层22例如通过以冲孔板的冲孔的至少一部分连通的方式层叠而形成。腐蚀防止层122以将基材11的主面11A及多个楔型部件121的表面覆盖的方式形成。
本实施方式的水中滑动部件形成有腐蚀防止层122,以将基材11的主面11A及多个楔型部件221的表面覆盖。因此,即使是滑动层13的树脂材料包含碳纤维等导电性的填充件的情况,也能够在水中环境中将从轴15经过滑动部件10向轴承基材流动的腐蚀电流切断,能够防止轴的腐蚀。
此外,如果在作为多孔质构造的中间层22具备的第1空孔221A内存在没有被填充树脂材料的部分(间隙),则在水中环境中,水进入到间隙中。因此,以间隙为起点发生腐蚀(间隙腐蚀)。
但是,在本实施方式中,形成有腐蚀防止层222,以将基材11的主面11A及多个楔型部件221的表面覆盖。因此,能够抑制上述那样的第1间隙,由此抑制间隙腐蚀,在将滑动部件20(轴承部件)在水中长时间使用的情况下,也能够抑制机械特性随时间经过而劣化。
这样,根据本实施方式,即使在将滑动部件20在水中长时间使用的情况下,也能够通过将从轴15经过滑动部件20向轴承基材流动的腐蚀电流切断来防止轴的腐蚀,并且能够持续长期呈现较高的机械特性。
另外,其他特征,例如中间层22的楔型部件221的结构材料等,与第1实施方式的滑动部件10的球状部件121相同,所以省略说明。
本实施方式的滑动部件20的制造方法中,中间层22的多孔质构造代替由多个球状部件121构成而由多个楔型部件221构成,除此以外,基本上与图3~图6所示那样的情况是同样的。
另外,多个楔型部件221的形成也可以预先准备截面形状为T字型的多个楔型部件221,使用它们代替多个球状部件121来进行。除此以外,也可以例如通过将形成有大小不同的多个冲孔的两片板状部件以该冲孔交叠的方式层叠,来形成多个楔型部件221。
图8及图9是表示使用形成有冲孔的两片板状部件来形成多个楔型部件221的情况下的一例的工序图。
如图8所示,在基板11的主面11A上,通过钎焊等,结合配置形成有冲孔221-2A的下板状部件221-2X。接着,如图9所示,将形成有冲孔221-1A的上板状部件221-2X以使冲孔221-1A与冲孔221-2A一致的方式通过钎焊等对下板状部件221-1X进行结合配置。结果,能够形成图7所示那样的楔型部件221。
另外,其他的形成腐蚀防止层122或滑动层13等的工序与图3~图6所示的工序相同,所以省略说明。
本实施方式的滑动部件20(轴承部件)例如可以作为水车、水车发电机、泵等水力机械的滑动部件(轴承部件)而适当地使用。
在上述第1实施方式及第2实施方式中,将构成中间层12及22的多孔质构造的部件做成球状及楔型,但只要满足中间层12及22的多孔质构造起到对于滑动层13的锚定效果这样的要件,则上述部件的形状没有特别限定。例如,中间层12及22的多孔质构造的空孔也可以不贯通。
[实施例]
(实施例1)
首先,在具有圆筒形状的由SUS316不锈钢构成的基材11的主面11A上涂敷Ag-56质量%Cu焊料。并且,将直径3mm的由SUS316不锈钢构成的多个钢球121散布到其上。然后,在1050℃、10-3Torr的真空中进行加热处理,使多个钢球121结合到基材11的主面11A上。这样,形成多孔质构造的中间层12。
接着,在基材11的主面11A及多个钢球121的表面上,重复涂敷将四氟乙烯-六氟丙烯共聚物的树脂粉末(腐蚀防止层122的原材料)分散到溶剂中而成的分散液并干燥的工序,直到最终的厚度成为0.5mm。这样,使上述树脂粉末附着到基材11的主面11A及多个钢球121的表面上。
接着,将基材11及多个钢球121内包,将由包含腐蚀防止层122在内的中间层12构成的装配体配置到模具17内。并且,在该装配体上填充含有30质量%碳纤维的四氟乙烯树脂的原料粉末。碳纤维使用直径7~10μm、长度3mm的短纤维。
接着,在原料粉末上配置厚度0.3mm的无纺布16及由PTFE构成的压力传递介质(粉末)18,通过具有平面形状的成形冲头19,以压力50MPa在一方向上压缩成形。
接着,在将无纺布16及压力传递介质18除去后,将上述原料粉末的成型体在370℃下加热两小时。由此,将成型体加热熔融而形成滑动层13,并将附着在基材11的主面11A及多个钢球121的表面上的树脂粉末加热熔融,在该表面上形成了腐蚀防止层122。
调查这样得到的滑动部件的腐蚀电流的流动状况后,确认了腐蚀电流被切断、不发生间隙腐蚀。
根据以上说明的至少一个实施方式,在水中环境中长时间使用的情况下,也能够抑制机械特性随时间经过而劣化。
以上,说明了本发明的一些实施方式,但这些实施方式是作为例子提出的,并不意味着限定发明的范围。这些新的实施方式能够以其他各种各样的形态实施,在不脱离发明的主旨的范围内能够进行各种省略、替换、变更。这些实施方式及其变形包含在发明的范围及主旨中,并包含在与权利要求书中记载的发明和其等价的范围中。
标号说明
10 水中滑动部件(轴承部件)
11 基材
11A 基材的主面
12、22 中间层
121 球状部件
121A、221A 第1空孔
122 腐蚀防止层
122A、222A 第2空孔
13 滑动层
15 轴
20 水中滑动部件(轴承部件)
221 楔型部件
Claims (10)
1.一种水中滑动部件,在水中使用,其特征在于,具备:
基材,由第1金属材料构成;
多孔质构造的中间层,接合在上述基材上,由第2金属材料构成;
腐蚀防止层,一部分熔融而填充到上述中间层的多孔质构造的空孔内;以及
滑动层,形成在上述腐蚀防止层上,
上述滑动层包含:包括四氟乙烯树脂的树脂材料、由含有碳及石墨的至少一方的纤维及颗粒构成的填充件、由钛酸钾、硼酸铝及氧化锌中的至少一种的晶须、纤维及颗粒构成的追加的填充件。
2.如权利要求1所述的水中滑动部件,其特征在于,
上述基材的上述第1金属材料是由铁及铬构成的不锈钢,由铁、铬及镍构成的不锈钢,以及由铁、铬、镍、钼、锰、硅、铌及钛构成的不锈钢中的至少一个。
3.如权利要求1或2所述的水中滑动部件,其特征在于,
上述中间层的上述第2金属材料是由铁及铬构成的不锈钢,由铁、铬及镍构成的不锈钢,以及由铁、铬、镍、钼、锰、硅、铌及钛构成的不锈钢中的至少一个。
4.如权利要求1或2所述的水中滑动部件,其特征在于,
上述腐蚀防止层由氟树脂构成。
5.如权利要求3所述的水中滑动部件,其特征在于,
上述腐蚀防止层由氟树脂构成。
6.一种水中滑动部件的制造方法,是在水中使用的水中滑动部件的制造方法,其特征在于,具备如下工序:
使由第2金属材料构成的多孔质构造的中间层结合到由第1金属材料构成的基材的工序;
形成一部分熔融而填充到上述中间层的多孔质构造的空孔内的腐蚀防止层的工序;以及
在上述腐蚀防止层上形成滑动层的工序,
上述滑动层包含:包括四氟乙烯树脂的树脂材料、由含有碳及石墨的至少一方的纤维及颗粒构成的填充件、由钛酸钾、硼酸铝及氧化锌中的至少一种的晶须、纤维及颗粒构成的追加的填充件。
7.如权利要求6所述的水中滑动部件的制造方法,其特征在于,
关于上述腐蚀防止层,在一边含浸到预先将原料粉末至少分散到上述中间层上而成的混合粉末中一边成形后,进行加热而熔融处理。
8.如权利要求6或7所述的水中滑动部件的制造方法,其特征在于,
在使上述树脂材料的粉末分散配置到上述腐蚀防止层上之后,通过压缩成型及烧制,形成上述滑动层。
9.一种水中轴承部件,其特征在于,
包括权利要求1~5中任一项所述的水中滑动部件。
10.一种水力机械,其特征在于,
包括权利要求9所述的水中轴承部件。
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US9105561B2 (en) * | 2012-05-14 | 2015-08-11 | The Boeing Company | Layered bonded structures formed from reactive bonding of zinc metal and zinc peroxide |
JP6193032B2 (ja) * | 2013-07-18 | 2017-09-06 | 株式会社荏原製作所 | すべり軸受装置およびこれを備えたポンプ |
DE102014113971A1 (de) * | 2014-09-26 | 2016-03-31 | Thyssenkrupp Ag | Außenbordvorrichtung und Verfahren zum Beschichten einer Außenbordvorrichtung |
US10428874B2 (en) | 2014-12-19 | 2019-10-01 | Saint-Gobain Performance Plastics Pampus Gmbh | Sliding component and method of forming the same |
US9835200B2 (en) * | 2015-04-15 | 2017-12-05 | Siemens Energy, Inc. | Generator bearing assembly and a method for lubricating a generator bearing assembly |
WO2017024859A1 (zh) * | 2015-08-10 | 2017-02-16 | 大连三环复合材料技术开发股份有限公司 | 核主泵水润滑复合材料推力轴承 |
JP6885719B2 (ja) * | 2016-12-27 | 2021-06-16 | 大豊工業株式会社 | 摺動部材およびコンプレッサー用ブシュ |
US10767696B2 (en) * | 2017-12-29 | 2020-09-08 | Saint-Gobain Performance Plastics Pampus Gmbh | Bearing component and method of making and using the same |
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