US 6,398,530 B1Granted

Scroll compressor having entraining members for radial movement of a scroll rib

AssigneeBITZER Kuehlmaschinenbau GmbH

InventorThomas Hasemann

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Abstract

In order to improve a compressor comprising a scroll compressor with a first compressor member and a second compressor member, a drive with a drive motor and an entraining unit which has an entraining member moving on an entraining path and an entraining member receiving means arranged on the second compressor member, wherein the compressor member receiving means is movable in a radial direction in relation to the central axis with a radial degree of freedom in relation to the entraining member, in such a manner that this can be produced as simply as possible and operates as reliably as possible it is suggested that the entraining member have an entraining member surface curved convexly in a direction transverse to the central axis in a direction of rotation, that the entraining member receiving means be non-rotatably arranged in relation to the second compressor member and have an entraining surface which surrounds the entraining member in a ring shape and on which the entraining member surface bears by always acting upon it with a force only in an orbiting subsection and that a space exist between the entraining member and the entraining surface outside the subsection acted upon with a force.

Claims27

Dependent claims

A compressor comprising:

a scroll compressor with a first compressor member and a second compressor member, said compressor members having first and second scroll ribs, respectively, in the form of a circular involute and engaging in one another such that the second compressor member is movable in relation to the first compressor member on an orbital path about a central axis,
a drive for the scroll compressor with a drive motor and an entraining unit having an eccentric body fixed on said drive shaft as an entraining member driven by the drive motor and moving on an entraining path about said central axis, and
an entraining member receiving means provided on the body of the second compressor member,
the entraining member receiving means being movable in a radial direction in relation to said central axis with a radial degree of freedom in relation to the entraining member, such that the second compressor member is movable so as to sealingly abut with the second scroll rib on the first scroll rib of the first compressor member on account of the radial degree of freedom and the centrifugal forces acting on the second compressor member,
the entraining member having an entraining member surface curved convexly in a direction transverse to the central axis in a direction of rotation,
the entraining member receiving means being non-rotatably arranged in relation to the second compressor member and having an entraining surface surrounding the entraining member in a ring shape,
the entraining member surface bearing on said entraining surface by always acting upon it with a force only in a subsection,
during movement of the second compressor member on the orbital path, the subsection acted upon with a force likewise moving on the entraining surface, and
a space allowing the radial degree of freedom of the entraining member receiving means in relation to the entraining member existing between the entraining member and the entraining surface outside the subsection acted upon with a force.

6 more elements

A compressor comprising:

a scroll compressor with a first compressor member and a second compressor member, said compressor members having first and second scroll ribs, respectively, in the form of a circular involute and engaging in one another such that the second compressor member is movable in relation to the first compressor member on an orbital path about a central axis,
a drive for the scroll compressor with a drive motor and an entraining unit having an entraining member fixed on said drive shaft driven by the drive motor and moving on an entraining path about said central axis, and
an entraining member cooperating means non-rotatably provided on the body of the second compressor member,
said entraining member and said entraining member cooperating means comprising a pin and an opening in which said pin extends,
the entraining member cooperating means being movable in a radial direction in relation to said central axis with a radial degree of freedom in relation to the entraining member, such that the second compressor member is movable so as to sealingly abut with the second scroll rib on the first scroll rib of the first compressor member on account of the radial degree of freedom and the centrifugal forces acting on the second compressor member,
one of said entraining member and said entraining member cooperating means having a surface curved convexly in a direction transverse to the central axis in a direction of rotation,
the other of said entraining member and said entraining member cooperating means having a surface surrounding the convex surface in a ring shape,
said convex surface bearing on said ring surface by always acting upon it with a force only in a subsection,
during movement of the second compressor member on the orbital path, the subsection acted upon with a force likewise moving on the ring surface,
a space allowing the radial degree of freedom of the entraining member cooperating means in relation to the entraining member existing between the entraining member and the ring surface outside the subsection acted upon with a force.

7 more elements

A compressor comprising:

a scroll compressor with a first compressor member and a second compressor member, said compressor members having first and second scroll ribs, respectively, in the form of a circular involute and engaging in one another such that the second compressor member is movable in relation to the first compressor member on an orbital path about a central axis,
a drive for the scroll compressor with a drive motor and an entraining unit having an entraining member driven by the drive motor and moving on an entraining path about said central axis, and
an entraining member receiving means arranged on the second compressor member,
the entraining member receiving means being movable in a radial direction in relation to said central axis with a radial degree of freedom in relation to the entraining member, such that the second compressor member is movable so as to sealingly abut with the second scroll rib on the first scroll rib of the first compressor member on account of the radial degree of freedom and the centrifugal forces acting on the second compressor member,
the entraining member receiving means being non-rotatably arranged in relation to the second compressor member and having an entraining surface surrounding the entraining member in a ring shape,
the entraining member having an entraining member surface curved convexly in a direction transverse to the central axis in a direction of rotation,
the entraining member surface bearing on said entraining surface by always acting upon it with a force only in a subsection,
during movement of the second compressor member on the orbital path, the subsection acted upon with a force likewise moving on the entraining surface,
a space allowing the radial degree of freedom of the entraining member receiving means in relation to the entraining member existing between the entraining member and the entraining surface outside the subsection acted upon with a force,
the entraining surface associated with the entraining member surface being arranged on an intermediate ring which bears with an additional entraining member surface on a subsection of an additional entraining surface by acting upon the subsection with a force, and
an additional space contributing to the radial degree of freedom of the entraining member receiving means in relation to the entraining member likewise existing between the intermediate ring and the additional entraining surface.

8 more elements

A compressor comprising:

a scroll compressor with a first compressor member and a second compressor member, said compressor members having first and second scroll ribs, respectively, in the form of a circular involute and engaging in one another such that the second compressor member is movable in relation to the first compressor member on an orbital path about a central axis,
a drive for the scroll compressor with a drive motor and an entraining unit having an entraining member driven by the drive motor and moving on an entraining path about said central axis, and
an entraining member receiving means arranged on the second compressor member,
the entraining member receiving means being movable in a radial direction in relation to said central axis with a radial degree of freedom in relation to the entraining member, such that the second compressor member is movable so as to sealingly abut with the second scroll rib on the first scroll rib of the first compressor member on account of the radial degree of freedom and the centrifugal forces acting on the second compressor member,
the entraining member receiving means being non-rotatably arranged in relation to the second compressor member and having an entraining surface surrounding the entraining member in a ring shape,
the entraining member having an entraining member surface curved convexly in a direction transverse to the central axis in a direction of rotation,
the entraining member surface bearing on said entraining surface by always acting upon it with a force only in a subsection,
during movement of the second compressor member on the orbital path, the subsection acted upon with a force likewise moving on the entraining surface,
a space allowing the radial degree of freedom of the entraining member receiving means in relation to the entraining member existing between the entraining member and the entraining surface outside the subsection acted upon with a force,
a hydrodynamic lubrication film being generatable between the entraining member surface and the associated entraining surface,
the supply of lubricant taking place via the entraining member,
the entraining member being provided with a lubricant outlet opening which opens into the space.

9 more elements

Dependencies are inferred from the claim text.