Unbalance correction device of high speed rotary apparatus

• US 8,322,204 B2
• Filed: 06/18/2008
• Issued: 12/04/2012
• Est. Priority Date: 07/19/2007
• Status: Expired due to Fees

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Maeda, Osamu
• Primary Examiner(s): MCCALL, ERIC SCOTT
• Application Number:
  US12/667,056
• Publication Number:
  US 20100191380A1
• Time in Patent Office: 1,630 Days
• Field of Search: 73/66, 731/147.7, 731/160.2, 731/160.3, 731/160.4, 734/55, 734/60
• US Class Current: 73/116.04
• CPC Class Codes: G01M 1/02 Details of balancing machines or devices
• CPC Class Codes: G01M 1/36 by adjusting position of masses built-in the body to be tested

Abstract

An unbalance correction device of a high speed rotary apparatus which can prevent the lowering of productivity in the production line of a high speed rotary apparatus while reducing variation in the posture of a workpiece supported by a jig and suppressing vibration of a member (clamp member) for securing the workpiece to the jig, and can enhance the precision of unbalance correction. The unbalance correction device (1) of a high speed rotary apparatus includes a plurality of claw structures (10) (clamp members) for fixing, by clamping, a workpiece (20) to a turbine housing section (3); a cylinder mechanism (30) for moving and energizing the claw structures (10), a solenoid valve (35) for adjusting the moving amount and energizing force of the claw structure (10) by the cylinder mechanism (30); a position sensor (37) for detecting the position of the claw structure (10); and posture control means for controlling each solenoid valve (35) such that the position shift of the claw structure (10) detected by the position sensor (37) becomes smaller than its acceptable value.

Claims

1. A device for correcting an unbalance of a high-speed rotary apparatus, comprising a jig for supporting a work having a rotating portion and including means for detecting vibration, wherein when fixing the work to the jig where the rotating portion being rotatable, the rotating portion rotated at a given rotation number and performing an unbalance correction of the rotating portion, based on a detected value by the detecting means, the device comprising:

a plurality of clamping members for clamping and fixing the work on the jig, with being biased in given directions where the work is fixed on the jig in the engaged condition where they are engaged with the work supported by the jig;

a plurality of means for moving the clamping members in moving directions including the given directions and for biasing the clamping members on the engaged condition in the given directions, provided with respect to the each clamping members;

a plurality of means for adjusting moving amounts of the clamping members in the moving directions by the moving and biasing means and biasing forces for the clamping members in the given directions, provided with respect to the each moving and biasing means;

a plurality of means for detecting positions of the clamping members in the moving direction on the engaged condition, provided with respect to the each clamping members; and

a plurality of means for controlling each of the adjusting means, such that shifting amounts of the positions in the moving direction of the clamping members, from the predetermined reference positions, on the engaged condition detected by the position detecting means, based on detected signals from the each position detecting means, become smaller than given acceptable values preliminarily determined for the shifting amounts.

2. The device according to claim 1, further comprising:

means for detecting displacements of the vibrations in the moving directions of the clamping members clamping the work on the jig with respect to the device body integrally constructed including the jig with the rotation of the rotating portion, provided with respect to the each clamping members;

means for switching moving and biasing directions in the moving directions of the clamping members by means of the moving and biasing means, provided with respect to the each moving and biasing means;

means for controlling the biasing forces biasing the clamping members by means of the moving and biasing means in the moving and biasing directions of the clamping members defined by the switching means, provided with respect to the each moving and biasing means;

means for calculating excitation forces acting on the clamping members in the moving directions with the rotation of the rotating portion, based on the displacements of the clamping members detected by the displacement detecting means, as well as total mass of the clamping members, total damping of the clamping members in the moving directions and total rigidity of the clamping members in the moving directions;

means for calculating damping forces acting on the clamping members in an opposite directions and the same sizes to the excitation forces calculated by the excitation force calculating means; and

means for controlling the switching means and biasing force controlling means, such that the damping forces calculated by the damping force calculating means act on the clamping members.

3. The device according to claim 1, wherein the moving and biasing means is constituted as a fluid pressure cylinder mechanism using magnetic fluid as the working fluid, the device further comprising:

means for detecting displacements of the vibrations in the moving directions of the clamping members clamping the work on the jig with respect to the device body integrally constructed including the jig with the rotation of the rotating portion, provided with respect to the each clamping members;

means for applying magnetic field to the magnetic fluid, provided with respect to the each moving and biasing means;

means for memorizing pre-calculated data for relationship between the total damping and an intensity of the magnetic field applied to the magnetic fluid by the magnetic field applying means;

means for calculating the total damping of the clamping members in the moving directions, counteracting the excitation forces acting on the clamping members in the moving directions with the rotation of the rotating portion, based on the displacements of the clamping members detected by the displacement detecting means, as well as the total mass of the clamping members and the total rigidity of the clamping members in the moving directions; and

means for controlling the magnetic field applying means, such that the intensity of the magnetic field applied to the magnetic fluid corresponds to the total damping calculated by the damping calculating means, based on the data memorized by the data memorizing means.

4. A device for correcting an unbalance of a high-speed rotary apparatus, comprising a jig for supporting a work having a rotating portion and including means for detecting vibration, wherein when fixing the work to the jig where the rotating portion being rotatable, the rotating portion rotated at a given rotation number and performing an unbalance correction of the rotating portion, based on a detected value by the detecting means, the device comprising:

a plurality of clamping members for clamping and fixing the work on the jig, with being biased in given directions where the work is fixed on the jig in the engaged condition where they are engaged with the work supported by the jig;

a plurality of means for moving the clamping members in moving directions including the given directions and for biasing the clamping members on the engaged condition in the given directions, provided with respect to the each clamping members;

means for detecting displacements of the vibrations in the moving directions of the clamping members clamping the work on the jig with respect to the device body integrally constructed including the jig with the rotation of the rotating portion, provided with respect to the each clamping members;

means for switching moving and biasing directions in the moving directions of the clamping members by means of the moving and biasing means, provided with respect to the each moving and biasing means;

means for controlling the biasing forces biasing the clamping members by means of the moving and biasing means in the moving and biasing directions of the clamping members defined by the switching means, provided with respect to the each moving and biasing means;

means for calculating excitation forces acting on the clamping members in the moving directions with the rotation of the rotating portion, based on the displacements of the clamping members detected by the displacement detecting means, as well as total mass of the clamping members, total damping of the clamping members in the moving directions and total rigidity of the clamping members in the moving directions;

means for calculating damping forces acting on the clamping members in an opposite directions and the same sizes to the excitation forces calculated by the excitation force calculating means; and

means for controlling the switching means and biasing force controlling means, such that the damping forces calculated by the damping force calculating means act on the clamping members.

5. A device for correcting an unbalance of a high-speed rotary apparatus, comprising a jig for supporting a work having a rotating portion and including means for detecting vibration, wherein when fixing the work to the jig where the rotating portion being rotatable, the rotating portion rotated at a given rotation number and performing an unbalance correction of the rotating portion, based on a detected value by the detecting means, the device comprising:

a plurality of clamping members for clamping and fixing the work on the jig, with being biased in given directions where the work is fixed on the jig in the engaged condition where they are engaged with the work supported by the jig;

a plurality of means for moving the clamping members constituted as a fluid pressure cylinder mechanism using magnetic fluid as the working fluid in moving directions including the given directions and for biasing the clamping members on the engaged condition in the given directions, provided with respect to the each clamping members;

means for detecting displacements of the vibrations in the moving directions of the clamping members clamping the work on the jig with respect to the device body integrally constructed including the jig with the rotation of the rotating portion, provided with respect to the each clamping members;

means for applying magnetic field to the magnetic fluid, provided with respect to the each moving and biasing means;

means for memorizing pre-calculated data for relationship between the total damping and an intensity of the magnetic field applied to the magnetic fluid by the magnetic field applying means;

means for calculating the total damping of the clamping members in the moving directions, counteracting the excitation forces acting on the clamping members in the moving directions with the rotation of the rotating portion, based on the displacements of the clamping members detected by the displacement detecting means, as well as the total mass of the clamping members and the total rigidity of the clamping members in the moving directions; and

means for controlling the magnetic field applying means, such that the intensity of the magnetic field applied to the magnetic fluid corresponds to the total damping calculated by the damping calculating means, based on the data memorized by the data memorizing means.