US4941352A — Method and apparatus for mass centering of a rotor

Claim 1

Independent Claim 245 words

Apparatus for mass centering of a rotor including: an unbalance measuring means for measuring the unbalance of the rotor, comprising a rotary spindle for carrying the rotor and means for rotating the spindle about an axis of rotation in the unbalance measuring operation; an evaluation means operatively connected to the unbalance measuring means for ascertaining from the result of the unbalance measuring operation and the weight of the rotor the position of the axis of inertia thereof which extends through the center of mass of the rotor, with respect to said axis of rotation; a marking means comprising a marking tool for marking the position of the axis of inertia of the rotor on an end face thereof; and an adjusting mean for producing a relative displacement between the rotor and the marking tool in a radial direction with respect to the axis of rotation and parallel to the axis of rotation, the adjusting means including guide means for guiding one of said rotor and said marking means in said relative displacement, being disposed at an inclined angle with respect to the axis of rotation, whereby said relative displacement determines on said end face of the rotor a linear region of action of the marking tool which extends through said axis of rotation, such that the point on the end face of the rotor at which the measured axis of inertia passes therethrough can he turned into said region of action of said marking tool.

Claim 2

Dependent Claim 245 words

Apparatus for mass centering of a rotor including: an unbalance measuring means for measuring the unbalance of the rotor, comprising a rotary spindle for carrying the rotor and means for rotating the spindle about an axis of rotation in the unbalance measuring operation; an evaluation means operatively connected to the unbalance measuring means for ascertaining from the result of the unbalance measuring operation and the weight of the rotor the position of the axis of inertia thereof which extends through the center of mass of the rotor, with respect to said axis of rotation; a marking means comprising a marking tool for marking the position of the axis of inertia of the rotor on an end face thereof; and an adjusting mean for producing a relative displacement between the rotor and the marking tool in a radial direction with respect to the axis of rotation and parallel to the axis of rotation, the adjusting means including guide means for guiding one of said rotor and said marking means in said relative displacement, being disposed at an inclined angle with respect to the axis of rotation, whereby said relative displacement determines on said end face of the rotor a linear region of action of the marking tool which extends through said axis of rotation, such that the point on the end face of the rotor at which the measured axis of inertia passes therethrough can he turned into said region of action of said marking tool.

Claim 3

Dependent Claim 83 words

Apparatus as set forth in claim 1 wherein said adjusting means comprises a first slide carrying one of said unbalance measuring means and said marking means, a second slide carrying the other of said unbalance measuring means and said marking means, a first guide slidably guiding one of the slides parallel to said axis of rotation of the rotor and a second guides slidably guiding the other slide inclinedly at said inclined angle with respect to the axis of rotation of the rotor.

Claim 4

Dependent Claim 43 words

Apparatus as set forth in claim 2 wherein said first slide carries said unbalance measuring means with said rotor and is slidably guided by said first guide, and said second slide carries said marking means and is slidably guided by said second guide.

Claim 5

Dependent Claim 48 words

Apparatus as set forth in claim 1 comprising a one-piece base member supporting said unbalance measuring means and said marking means, said base member providing a guide plane disposed at an inclined angle with respect to the axis of rotation of the rotor, thereby constituting said guide means.

Claim 6

Dependent Claim 33 words

Apparatus as set forth in claim 1 including further guide means for guiding the other of said rotor and said marking means in parallel relationship with the axis of rotation of the rotor.

Claim 7

Dependent Claim 50 words

Apparatus as set forth in claim 1 wherein said adjusting means comprise first and second slides each carrying a respective one of said unbalance measuring means and said marking means, and further comprising a base member providing said guide means for guiding said first and second slides jointly displaceably thereon.

Claim 8

Dependent Claim 19 words

Apparatus as set forth in claim 6 and further comprising a connecting means interconnecting said first and second slides.

Claim 9

Dependent Claim 58 words

Apparatus as set forth in claim 1 wherein said unbalance measuring means, in relation to said spindle for carrying said rotor in an unbalance measuring operation, has means for adjusting said spindle in a radial direction with respect to the axis of rotation of the rotor and perpendicularly to said linear region of action of said marking tool.

Claim 10

Dependent Claim 50 words

Apparatus as set forth in claim 1 including means for fixing the rotor in a marking operation in a position in which the axis of rotation and the axis of inertia thereof are disposed in a common plane extending perpendicularly to the guide plane defined by said inclined guide means.

Claim 11

Dependent Claim 36 words

Apparatus as set forth in claim 1 and further including a slide carrying said marking means and guided on said guide means at an inclined angle with respect to the axis of rotation of the rotor.

Claim 12

Dependent Claim 150 words

Apparatus as set forth in claim 1 wherein said adjusting means comprises a first slide carrying one of said unbalance measuring means and said marking means, a second slide carrying the other of said unbalance measuring means and said marking means, a first guide slidably guiding one said slide in parallel relationship to the axis of rotation of the rotor, a second guide slidably guiding the other said slide inclinedly at said angle with respect to the axis of rotation of the rotor, wherein said inclined guide for the other of said first and second slides is adapted, for said adjusting movement as between the rotor and the marking tool, in the adjusting direction, to determine a component of motion in the common plane in which the axis of rotation and the axis of inertia of the rotor lie, in a radial direction with respect to said axis of rotation.

Claim 13

Dependent Claim 50 words

Apparatus as set forth in claim 11 wherein said marking means is carried by said other slide guided by said second guide, thereby to perform said relative displacement with respect to the rotor in the common plane for the axis of rotation and the axis of inertia of the rotor.

Claim 14

Dependent Claim 42 words

Apparatus as set forth in claim 1 wherein said marking tool comprises a drill so arranged that the axis of the spindle of the unbalance measuring means and the axis of the drill coincide in the initial position of said adjusting means.

Claim 15

Dependent Claim 54 words

Apparatus as set forth in claim 1 wherein said guide means disposed at an inclined angle with respect to the axis of rotation is arranged to provide a guided movement in a radial direction away from the axis of rotation of the rotor in said relative displacement between the rotor and the marking tool.

Claim 16

Dependent Claim 64 words

Apparatus as set forth in claim 1 comprising a base member which provides said guide means disposed at an inclined angle with respect to the axis of rotation of the rotor, and a slide slidably carried on said guide means, wherein said unbalance measuring means is mounted at a stationary location on said base member and said marking means is carried on said slide.

Claim 17

Dependent Claim 64 words

Apparatus as set forth in claim 1 comprising a base member which provides said guide means disposed at an inclined angle with respect to the axis of rotation of the rotor, and a slide slidably carried on said guide means, wherein said marking means is mounted at a stationary location on said base member and said unbalance measuring means is carried on said slide.

Claim 18

Dependent Claim 64 words

A method of calibrating an apparatus as set forth in claim 1 wherein after said axis of inertia of said rotor has been determined, said rotor is turned about its said axis of inertia and an unbalance measuring operation is performed on the rotor, the initial position of said adjusting means then being corrected in dependence on the measure unbalance remaining in the rotor.

Claim 19

Dependent Claim 43 words

A method as set forth in claim 17 and further comprising correcting displacement of said spindle of said unbalance measuring means in a radial direction with respect to the axis of rotation thereof and perpendicularly to the correcting displacement of said initial position.

Claim 20

Dependent Claim 153 words

In a method of mass centering of a rotor comprising: measuring the unbalance of the rotor; determining from the result of the unbalance measuring operation and the mass of the rotor, the position of the axis of inertia of the rotor with respect to the axis of rotation thereof; and marking the point at which the axis of inertia passes through an end face of the rotor, on said end face, by means of a marking tool having a punctiform working surface, the improvement which provides that, to mark the point at which said axis of inertia passes through said end face of the rotor, the rotor is turned into an angular position such that said point is disposed in a plane in which the axis of rotation of the rotor is disposed and in which the working surface of said marking tool is linearly displaceable with respect to said axis of rotation.

Claim 21

Dependent Claim 153 words

In a method of mass centering of a rotor comprising: measuring the unbalance of the rotor; determining from the result of the unbalance measuring operation and the mass of the rotor, the position of the axis of inertia of the rotor with respect to the axis of rotation thereof; and marking the point at which the axis of inertia passes through an end face of the rotor, on said end face, by means of a marking tool having a punctiform working surface, the improvement which provides that, to mark the point at which said axis of inertia passes through said end face of the rotor, the rotor is turned into an angular position such that said point is disposed in a plane in which the axis of rotation of the rotor is disposed and in which the working surface of said marking tool is linearly displaceable with respect to said axis of rotation.

Claim 22

Dependent Claim 41 words

A method as set forth in claim 19 wherein said tool is guided with respect to the axis of rotation of the rotor on an inclined surface disposed at an angle with respect to the axis of rotation of the rotor.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1993-07-16	1994-01-15	1994-07-17	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1997-07-16	1998-01-15	1998-07-17	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2001-07-16	2002-01-15	2002-07-17	$7700.00	Window Closed / Lapsed

Method and apparatus for mass centering of a rotor

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