# US 2014/0153852 A1 · Underwater sliding member, method for manufacturing underwater sliding member, and hydraulic machine

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- Number: US 2014/0153852 A1
- Document ID: US20140153852A1
- Status: Published application
- Kind: A1
- Application number: 14/173,839
- Filed: 2014-02-06
- Published: 2014-06-05
- Earliest claimed: 2011-08-08
- Assignees: Kabushiki Kaisha Toshiba
- Applicants: Kabushiki Kaisha Toshiba
- Inventors: Than Trong LONG; Tadashi OGUMA; Yasumi KIZAKI
- Web page: https://patentgrep.com/patent/US20140153852A1

## CPC

- F16C 33/208: {Methods of manufacture, e.g. shaping, applying coatings}
- B23K 35/004: {at least one of the workpieces being of a metal of the iron group}
- B23K 35/302: {Cu as the principal constituent}
- B32B 15/015: {the said other metal being copper or nickel or an alloy thereof}
- B32B 15/08: of synthetic resin
- B32B 15/18: comprising iron or steel {(B32B15/011, B32B15/012 and B32B15/013 take precedence)}
- B32B 27/20: using fillers, pigments, thixotroping agents
- B32B 27/322: {comprising halogenated polyolefins, e.g. PTFE}
- C22C 9/00: Alloys based on copper
- C22C 38/02: containing silicon
- C22C 38/04: containing manganese
- C22C 38/44: with molybdenum or tungsten
- F03B 11/06: Bearing arrangements
- F04D 29/026: {especially adapted for liquid pumps}
- F04D 29/046: Bearings
- F04D 29/047: hydrostatic; hydrodynamic
- F16C 17/14: specially adapted for operating in water
- F16C 33/122: {Multilayer structures of sleeves, washers or liners}
- F16C 33/127: {Details of intermediate layers, e.g. nickel dams}
- F16C 33/14: Special methods of manufacture; Running-in
- F16C 33/205: {with two layers}
- B32B 2264/102: Oxide or hydroxide
- B32B 2264/108: Carbon, e.g. graphite particles
- B32B 2307/714: Inert, i.e. inert to chemical degradation, corrosion
- B32B 2475/00: Frictional elements
- F05B 2260/95: Preventing corrosion
- F05D 2230/31: Layer deposition
- F05D 2230/40: Heat treatment
- F05D 2260/95: Preventing corrosion
- F05D 2300/171: Steel alloys
- F05D 2300/432: PTFE [PolyTetraFluorEthylene]
- F05D 2300/514: Porosity
- F05D 2300/603: Composites; e.g. fibre-reinforced
- F16C 2204/44: Alloys based on chromium
- F16C 2204/46: Alloys based on molybdenum
- F16C 2208/02: comprising fillers, fibres
- F16C 2208/58: Several materials as provided for in F16C2208/30 - F16C2208/54 mentioned as option
- F16C 2223/44: by casting molten material on the substrate
- F16C 2226/34: by brazing
- F16C 2300/34: Vertical, e.g. bearings for supporting a vertical shaft
- F16C 2380/26: Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
- Y02E 10/20: Hydro energy
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- 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
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- F03B: MACHINES OR ENGINES FOR LIQUIDS (positive-displacement engines for liquid F03C; machines for liquids and gases F01; positive-displacement machines for liquids F04, rotary fluid gearing of the hydrokinetic type F16H41/00)
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)
- F05B: INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

An underwater sliding member of the present embodiment is an underwater sliding member used under water, and has: a base material 11 made of a first metal material; an intermediate layer 12 of a porous structure joined to the base material 11 and made of a second metal material; a corrosion inhibiting layer 122 a part of which is melted and filled into a hole of the porous structure of the intermediate layer 12; and a sliding layer 13 formed on the corrosion inhibiting layer 122 and made of a resin material.

## Claims

### Claim 1

An underwater sliding member used under water, comprising:
a base material made of a first metal material;
an intermediate layer of a porous structure joined to said base material and made of a second metal material;
a corrosion inhibiting layer a part of which is melted and filled into a hole of the porous structure of said intermediate layer; and
a sliding layer formed on said corrosion inhibiting layer and made of a resin material.

### Claim 2 (depends on 1)

The underwater sliding member according to claim 1,
wherein the first metal material of said base material is at least one of stainless steel made of iron and chromium, stainless steel made of iron, chromium, and nickel, and stainless steel made of iron, chromium, nickel, molybdenum, manganese, silicon, niobium, and titanium.

### Claim 3 (depends on 1)

The underwater sliding member according to claim 1,
wherein the second metal material of said intermediate layer is at least one of stainless steel made of iron and chromium, stainless steel made of iron, chromium, and nickel, and stainless steel made of iron, chromium, nickel, molybdenum, manganese, silicon, niobium, and titanium.

### Claim 4 (depends on 1)

The underwater sliding member according to claim 1,
wherein said corrosion inhibiting layer is made of a fluorocarbon resin.

### Claim 5 (depends on 1)

The underwater sliding member according to claim 1,
wherein the resin material constituting said sliding layer contains a tetrafluoroethylene resin.

### Claim 6 (depends on 5)

The underwater sliding member according to claim 5,
wherein said sliding layer contains a filler made of a fiber and a particle which includes at least one of carbon and graphite.

### Claim 7 (depends on 5)

The underwater sliding member according to claim 5,
wherein said sliding layer contains an additional filler made of a whisker, fiber, and a particle of at least one kind of potassium titanate, aluminum borate, and zinc oxide.

### Claim 8

A method for manufacturing an underwater sliding member used under water, the method comprising:
joining an intermediate layer of a porous structure made of a second metal material to a base material made of a first metal material;
forming a corrosion inhibiting layer a part which is melted and filled into a hole of the porous structure of the intermediate layer; and
forming a sliding layer made of a resin material on the corrosion inhibiting layer.

### Claim 9 (depends on 8)

The method for manufacturing the underwater sliding member according to claim 8,
wherein the corrosion inhibiting layer is formed while being impregnated with a mixed powder of a material powder dispersed at least on the intermediate layer in advance, and thereafter heated and melt-processed.

### Claim 10 (depends on 8)

The method for manufacturing the underwater sliding member according to claim 8,
wherein the sliding layer is formed by dispersedly disposing the powder of the resin material on the corrosion inhibiting layer and thereafter performing compression-molding and baking.

### Claim 11 (depends on 1)

An underwater bearing member which includes the underwater sliding member according to claim 1.

### Claim 12 (depends on 11)

A hydraulic machine which includes the underwater sliding member according to claim 11.