# US 11,028,855 B2 · Method of manufacturing supercharger

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,028,855 B2
- Document ID: US11028855B2
- Status: Granted
- Kind: B2
- Application number: 15/551,660
- Filed: 2015-02-27
- Published: 2018-02-22
- Granted: 2021-06-08
- Earliest claimed: 2015-02-27
- Assignees: Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.
- Applicants: Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.
- Inventors: Masaya Hatanaka; Makoto Takeuchi; Kazuhiko Inoguchi; Takashi Arai; Hitomi Otsubo
- Web page: https://patentgrep.com/patent/US11028855B2

## CPC

- F04D 29/2227: {for special materials}
- C23C 4/02: Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C 4/10: Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
- C23C 24/04: Impact or kinetic deposition of particles
- C23C 24/08: by application of heat or pressure and heat (C23C24/04 takes precedence)
- F04D 13/021: {containing a coupling}
- F04D 17/10: for compressing or evacuating
- F04D 25/024: {the driving means being assisted by a power recovery turbine}
- F04D 27/0215: {Arrangements therefor, e.g. bleed or by-pass valves}
- F04D 29/023: {especially adapted for elastic fluid pumps}
- F04D 29/162: {of a centrifugal flow wheel}
- F04D 29/289: {having provision against erosion or for dust-separation}
- F04D 29/30: Vanes
- F04D 29/4206: {especially adapted for elastic fluid pumps}
- F04D 29/622: {Adjusting the clearances between rotary and stationary parts}
- F01D 11/122: {with erodable or abradable material (blades having cutting or grinding tips F01D5/20)}
- F05D 2220/40: in turbochargers
- F05D 2240/307: related to the tip of a rotor blade
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)
- C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04)
- F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS

## Abstract

An object is to provide a method of manufacturing a supercharger that can promptly and easily form an abradable layer in a supercharger. A method of manufacturing a supercharger is a method of manufacturing a supercharger including a turbine configured to rotationally drive, and a compressor having an impeller configured to rotate according to rotational force of the turbine and a housing (10) configured to store the impeller, and the method includes a process of applying coating of an abradable material which is to form an abradable layer (20) when being solidified, only to a predetermined range on a surface of the housing (10) via which the impeller and the housing (10) face.

## Claims

### Claim 1

A method of manufacturing a supercharger including a turbine configured to rotationally drive, and a compressor having an impeller configured to rotate according to rotational force of the turbine and a housing configured to store the impeller, the method comprising: a process of applying coating of an abradable material which is to form an abradable layer when being solidified, only to a predetermined range on either one of surfaces of the impeller and the housing via which the impeller and the housing face; and before the process of applying coating of the abradable material, a process of forming a recess portion to separate either one of the surfaces of the impeller and the housing into the predetermined range and an outer range to which coating of the abradable material is not applied, the recess portion being directly adjacent to each of the outer range and the predetermined range, wherein either one of the surfaces is a smoothly continuous surface before the recess portion is formed.

### Claim 2

A method of manufacturing a supercharger including a turbine configured to rotationally drive, and a compressor having an impeller configured to rotate according to rotational force of the turbine and a housing configured to store the impeller, the method comprising: a process of applying coating of an abradable material which is to form an abradable layer when being solidified, only to a predetermined range on a surface, the surface being either one of surfaces of the impeller and the housing via which the impeller and the housing face; and before the process of applying coating of the abradable material, a process of increasing a roughness degree in an outer range to which coating of the abradable material is not applied, the outer range being directly adjacent to the predetermined range, to be rougher than a roughness degree in the predetermined range, on either one of the surfaces of the impeller and the housing, wherein a region to which coating of the abradable material is applied and a region to which coating of the abradable material is not applied are on the same continuous surface.

### Claim 3

A method of manufacturing a supercharger including a turbine configured to rotationally drive, and a compressor having an impeller configured to rotate according to rotational force of the turbine and a housing configured to store the impeller, the method comprising: a process of applying coating of an abradable material which is to form an abradable layer when being solidified, only to a predetermined range on either one of surfaces of the impeller and the housing via which the impeller and the housing face, without applying masking, and before the process of applying coating of the abradable material, a process of forming a recess portion to separate either one of the surfaces of the impeller and the housing into the predetermined range and an outer range to which coating of the abradable material is not applied, the recess portion being directly adjacent to each of the outer range and the predetermined range, wherein either one of the surfaces is a smoothly continuous surface before the recess portion is formed.

### Claim 4 (depends on 3)

The method of manufacturing a supercharger according to claim 3, wherein coating of the abradable material is applied using a brush or a pad.

### Claim 5 (depends on 3)

The method of manufacturing a supercharger according to claim 3, further comprising a process of increasing a roughness degree in the outer range to which coating of the abradable material is not applied, the outer range being adjacent to the predetermined range, to be rougher than a roughness degree in predetermined range, on either one of the surfaces of the impeller and the housing, before the process of applying coating of the abradable material.

### Claim 6 (depends on 3)

The method of manufacturing a supercharger according to claim 3, wherein the abradable material contains synthetic resin and fine particles having a self-lubricating property.

### Claim 7 (depends on 3)

The method of manufacturing a supercharger according to claim 3, wherein coating of the abradable material is applied so that a density becomes lower on a surface side of the abradable layer than a density on a side of the impeller or a side of the housing, when the abradable material is solidified.