EP0060496A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Axial clearance adjustment mechanism for scroll type fluid displacement apparatus
Assignee: Sanden Corp
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Filing: 1982-03-09
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Granted: —
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Expires: 2002-03-09
Abstract
Abstract A scroll type fluid displacement apparatus is disclosed having an adjustment mechanism for adjusting the axial clearance between the spiral elements and end plates of the fixed and orbiting scrolls. The apparatus includes a housing (10) having a front end plate (11) and a cup shaped casing (12) attached thereto; the cup shaped casing (12) has a fluid inlet port (38) and a fluid outlet port (39). A fixed scroll (26), which includes a first end plate (261) and a first spiral element (262), is fixedly disposed within the interior of the cup shaped casing (12). A large threaded opening (122) is formed through an end plate (121) of the cup shaped casing (12). An adjusting screw (50) is screwed in the threaded opening (122) to abut against the end surface (261) of the fixed scroll (26). After adjusting the axial clearance between the fixed and orbiting scrolls (26, 27) by adjusting the position of the adjusting screw (50), a plurality of bolts (29) fasten the fixed scroll (26) to the cup shaped casing (12) to prevent further axial movement. Therefore, the adjustment of the axial clearance between the scrolls (26, 27) is easily obtained by adjustment of the adjusting screw (50) of the present invention.
Inventors
- 👤 Kiyoshi Terauchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 18:05
CPC Classifications
F; F01; F01C; F01C21/00; F01C21/10; F01C21/102; F01C1/00; F01C1/02; F01C1/0207; F01C1/0215; F04; F04C; F04C2230/00; F04C2230/60; F05; F05B; F05B2230/00; F05B2230/60
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
269 words
In a scroll type fluid displacement apparatus including a housing (10) having a front end plate (11) and a cub shaped casing (12), a fixed scroll (26) fixedly disposed relative to said housing (10) and having a first end plate (261) from which a first wrap (262) extends into said housing (10), an orbiting scroll (27) having a second end plate (271) from which a second wrap (272) extends, said first and second wraps (262, 272) interfitting at an angular and radial offset to make a plurality of line contacts to define at least one pair of sealed off fluid pockets, a driving mechanism (13) to effect orbital motion of said orbiting scroll (27), and rotation preventing means (28) for preventing rotation of said orbiting scroll (27) during orbital motion so that the fluid pockets change volume, characterized by an opening (122) having a threaded portion formed in an end plate (121) of said cup shaped casing (12); an adjusting screw (50) screwed into said threaded portion of said opening (122) to adjust the axial clearance between said fixed and orbiting scrolls (26, 27), said adjusting screw (50) having an axial end surface abutting against an axial end surface of said first end plate of said fixed scroll; and a plurality of fastening devices (29) fastening said fixed scroll (26) to said end plate (121) of said cup shaped casing (12) to maintain the axial clearance between the axial end surfaces of each of said wraps (262, 272) and the inner surfaces of each of said end plates after said adjusting screw (50) is screwed into said opening (122).
Claim 2
Dependent Claim
269 words
In a scroll type fluid displacement apparatus including a housing (10) having a front end plate (11) and a cub shaped casing (12), a fixed scroll (26) fixedly disposed relative to said housing (10) and having a first end plate (261) from which a first wrap (262) extends into said housing (10), an orbiting scroll (27) having a second end plate (271) from which a second wrap (272) extends, said first and second wraps (262, 272) interfitting at an angular and radial offset to make a plurality of line contacts to define at least one pair of sealed off fluid pockets, a driving mechanism (13) to effect orbital motion of said orbiting scroll (27), and rotation preventing means (28) for preventing rotation of said orbiting scroll (27) during orbital motion so that the fluid pockets change volume, characterized by an opening (122) having a threaded portion formed in an end plate (121) of said cup shaped casing (12); an adjusting screw (50) screwed into said threaded portion of said opening (122) to adjust the axial clearance between said fixed and orbiting scrolls (26, 27), said adjusting screw (50) having an axial end surface abutting against an axial end surface of said first end plate of said fixed scroll; and a plurality of fastening devices (29) fastening said fixed scroll (26) to said end plate (121) of said cup shaped casing (12) to maintain the axial clearance between the axial end surfaces of each of said wraps (262, 272) and the inner surfaces of each of said end plates after said adjusting screw (50) is screwed into said opening (122).
Claim 3
Dependent Claim
29 words
The improvement as claimed in claim 1 characterized in that a sealing element (54) is disposed between said opening (122) and the outer surface of said adjusting screw (50).
Claim 4
Dependent Claim
33 words
The improvement as claimed in claim 2, characterized in that a sealing element is disposed between said end plate (121) of said cub shaped casing (12) and each of said fastening devices (29).
Claim 5
Dependent Claim
102 words
The improvement as claimed in claim 1, characterized in that said first end plate (261) of said fixed scroll (26) has a plurality of internally threaded bosses on the opposite side thereof from which said first wrap extends, the axial end surface of said adjusting screw (50) abutting against the axial end surface of said threaded bosses, said end plate (121) of said cup shaped casing (12) having a plurality of screw holes (124) aligned with said threaded bosses to receive said fastening devices (29), each of said fastening devices (29) being screwed into said threaded bosses through said screw holes (124).
Claim 6
Dependent Claim
33 words
The improvement as claimed in claim 4, characterized in that said end plate (121) of said cup shaped casing (12) has an annular projection (123) forming said threaded portion of said opening (122).
Claim 7
Dependent Claim
62 words
The improvement as claimed in one of claims 1 - 5, characterized in that said end plate (121) of said cup shaped casing (12) has an annular projection (123) projecting axially along said opening (122) adjacent said first end plate (261) of said fixed scroll (26), an inner surface of said annular projection having said threaded portion of said opening formed thereon.
Claim 8
Dependent Claim
46 words
The improvement as claimed in claims 4, 5 or 6, characterized in that said adjusting screw (50) has an indentation (56) on its inner end surface to form a cavity between said adjusting screw (50) and said first end plate (261) of said fixed scroll (26).
Claim 9
Dependent Claim
80 words
The improvement as claimed in claim 1, characterized in that said first end plate (261) of said fixed scroll (26) has an annular projection axially projecting from the opposite side thereof from which said first wrap (262) extends and a plurality of screw holes (265) formed on an axial end surface of said annular projection to receive said fastening devices (29), the axial end surface of said adjusting screw. (50) abutting against the axial end surface of said annular projection.
Claim 10
Dependent Claim
48 words
The improvement as claimed in claim 8, characterized in that said end plate (121) of said cup shaped casing (12) has an annular projection (123) extending axially inward to form said opening (122), an inner surface of said annular projection of said end plate forming said threaded portion.
References Cited (Backward Citations)
No citation records indexed.
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