Method of manufacture of scroll compressors and scroll compressors manufactured thereby

Patent metadata

Field	Value
Publication number	US-2020248688-A1
Application number	US-201816758476-A
Country	US
Kind code	A1
Filing date	Oct 17, 2018
Priority date	Oct 26, 2017
Publication date	Aug 6, 2020
Grant date	—

Abstract

The invention relates to a method of manufacture of a scroll compressor ( 1 ), in particular for pretreatment for the coating of areas in contact with one another during operation of the scroll compressor ( 1 ). The scroll compressor ( 1 ) is developed with a non-movable spiral ( 3 ) with a base plate ( 3 a ) and a spiral-form wall ( 3 b ) extending from one side of the base plate ( 3 a ), as well as with a movable spiral ( 4 ) with a base plate ( 4 a ) and a spiral-form wall ( 4 b ) extending from a front side of the base plate ( 4 a ). The spirals ( 3, 4 ) are developed out of a basis material.

First claim

1 - 16 . (canceled)

17 . A method of manufacture of a scroll compressor, in particular of the pretreatment for the coating of areas in contact with one another during operation of the scroll compressor, wherein the scroll compressor is developed with a non-movable spiral with a base plate and a spiral-form wall, extending from one side of the base plate, as well as with a movable spiral with a base plate and a spiral-form wall extending from a front side of the base plate and the spirals are developed out of a basis material, the method comprising the following steps:
degreasing of an area to be coated of a surface of one of the spirals, etching of the area using an alkaline etching agent, etching of the area using an acidic etching agent, first etching of the area using a zincate etchant, application of a zincate layer as intermediate layer onto the area to be coated, further etching of the area using a zincate etchant, and coating of the treated area using a coating material closing off the surface.

18 . A method according to claim 17 , wherein the basis material comprises aluminum alloy AHS-7.

19 . A method according to claim 17 , further comprising the following steps as intermediate steps between the application of a zincate layer and the further etching of the area using a zincate etchant:
second etching of the area using an alkaline etching agent, second etching of the area using an acidic etching agent, second etching of the area using a zincate etchant, and application of a second zincate layer as an intermediate layer onto the area to be coated.

20 . A method according to claim 19 , wherein the basis material comprises aluminum alloy AlSi1MgMn.

21 . A method according to claim 20 , wherein the basis material comprises an aluminum alloy with a fraction of at least 9 mass percent to 11 mass percent of silicon.

22 . A method according to claim 21 , wherein exclusively one front face of the wall of the movable spiral is pretreated for coating and coated.

23 . A method according to claim 22 , wherein as the alkaline etching agent comprises a lye based on sodium hydroxide lye.

24 . A method according to claim 23 , wherein the acidic etching agent comprises nitric acid or hydrofluoric acid.

25 . A method according to claim 24 , wherein the basis material is flushed with a flushing agent between each of the etching steps.

26 . A method according to claim 25 , wherein at least one area of a surface of the base plate of the fixed spiral is worked and the method comprises the steps of:
degreasing of the area of the surface, etching of the area using an alkaline etching agent, etching of the area using an acidic etching agent, and anodizing of the area.

27 . A method according to claim 17 , wherein as the coating material comprises nickel.

28 . A scroll compressor for the compression of a gaseous fluid, comprising
a non-movable spiral with a base plate and a wall developed in the form of a spiral extending from one side of the base plate, and a movable spiral with a base plate and a wall developed in the form of a spiral extending from one side of the base plate with a free front face oriented distally to the base plate, wherein the base plates are disposed oriented with respect to one another such that the wall of the non-movable spiral and the wall of the movable spiral interleave, and the spirals are developed out of a uniform basis material, wherein the front face of wall of the movable spiral is sealingly disposed adjacently directly against the base plate of the non-movable spiral, wherein the front face of wall of the movable spiral is developed with a coating comprised of nickel.

29 . A scroll compressor according to claim 28 , wherein the front face of wall of the movable spiral is developed as a planar surface.

30 . A scroll compressor according to claim 28 , wherein the uniform basis material for both spirals comprises an aluminum alloy selected from the group consisting of AlSi1MgMn and AHS-7.

31 . A scroll compressor according to claim 30 , wherein the basis material comprises a silicon fraction of at least 9 mass percent to 11 mass percent.

32 . A scroll compressor according to claim 28 , wherein the front face of the wall of the movable spiral is developed such that it is pretreated and coated according to the method for the production of a scroll compressor A method of manufacture of a scroll compressor, in particular of the pretreatment for the coating of areas in contact with one another during operation of the scroll compressor, wherein the scroll compressor is developed with a non-movable spiral with a base plate and a spiral-form wall, extending from one side of the base plate, as well as with a movable spiral with a base plate and a spiral-form wall extending from a front side of the base plate and the spirals are developed out of a basis material, the method comprising the steps of:
degreasing of an area to be coated of a surface of one of the spirals, etching of the area using an alkaline etching agent, etching of the area using an acidic etching agent, first etching of the area using a zincate etchant, application of a zincate layer as intermediate layer onto the area to be coated, further etching of the area using a zincate etchant, and coating of the treated area using a coating material closing off the surface, wherein the spirals comprise aluminum alloy AHS-7.

Assignees

• Hanon Systems

Inventors

• Falkus Erik-Florian
• Dursun Kadir
• Salvador Frau Susana
• Guerin Nuno

Classifications

• C23C18/1837

  Multistep pretreatment · CPC title

• C23F1/20 Primary

  for etching aluminium or alloys thereof · CPC title

• F04C2230/10

  by removing material · CPC title

• C25D11/022

  Anodisation on selected surface areas · CPC title

• F04C18/0215 Primary

  where only one member is moving · CPC title