Apparatus and method of diagnosing machinery damage factor

• US 20030204333A1
• Filed: 04/24/2003
• Published: 10/30/2003
• Est. Priority Date: 04/25/2002
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Murakami, Masanori, Okazaki, Mitsuyoshi, Asatsu, Seiichi
• Granted Patent: US 6,922,657 B2
• Time in Patent Office: Days
• US Class Current: 702/35
• CPC Class Codes: G01H 1/006 of the rotor of turbo machines

Abstract

A vibration diagnosis is performed by using a vibration mode interactive query section grasping vibration event of a machinery such as turbine rotor and characteristic feature thereof from detected data information, a vibration factor diagnosis section estimating a vibration factor based on the information from the vibration mode interactive query section, and a diagnosis result display section indicating the estimated vibration factor and a guidance for countermeasure to be taken against the vibration factor.

Claims

1. An apparatus for diagnosing damage factor of machinery comprising;

a machinery damage mode interactive query section grasping damage factor event of machinery and characteristic feature thereof from data information given;

a machinery damage factor diagnosis section estimating a damage factor based on the information from the machinery damage mode interactive query section; and

a diagnosis result display section indicating the estimated damage factor and a guidance for countermeasure to be taken against the damage factor.

2. The apparatus for diagnosing damage factor of machinery according to claim 1, wherein said machinery damage factor diagnosis section includes a diagnosis matrix section, which is composed of several small matrixes featuring a plurality of machinery damage factors base on damage factor event, characteristic feature and damage generated conditions, and includes a diagnosis engine section, which builds up one matrix by collecting several small matrixes.

3. The apparatus for diagnosing damage factor of machinery according to claim 2, wherein said diagnosis matrix section has a structure making a matrix table on the basis of the machinery damage factors having direct relation to the damage factor event and feature and gives a weighing point to an intersection portion of the table in accordance with a relation of the damage factor with respect to the damage factor event and feature.

4. The apparatus for diagnosing damage factor according to claim 2, wherein said diagnosis engine section has a structure giving minus points to the damage factor event and feature having low damage factor probability in the matrix table.

5. The apparatus for diagnosing damage factor according to claim 2, wherein said diagnosis engine section has a structure multiplying both an answering rate to query items of the damage mode interactive query section and a matching rate to an answer when all damage factors are set as 100%, and then, multiplying correction coefficient so as to calculate a damage probability.

6. The apparatus for diagnosing damage factor according to claim 2, wherein said diagnosis engine section has a structure stepwise determining a damage probability based on the damage factor probability and a predetermined threshold value with respect to each damage factor.

7. The apparatus for diagnosing damage factor according to claim 2, wherein said diagnosis engine section has a structure stepwise determining the damage factor at three grades, that is, “

damage possibility is high”

, “

there is a possibility of damage”

, and “

there is no possibility of damage”

.

8. The apparatus for diagnosing damage factor according to claim 1, wherein said damage factor is a vibration factor.

9. A method of diagnosing a damage factor comprising steps of:

selecting an answer to prepared query items based on data information given;

estimating a damage factor on the basis of the selected answer;

weighing the estimated damage factor;

collecting an answering rate and a matching rate of the weighed damage factor;

calculating a damage factor probability by multiplying correction coefficient by both the answering rate and the matching rate of the damage factor; and

indicating a guidance for taking suitable course against the calculated damage factor probability.

10. The method of diagnosing a damage factor according to claim 9, wherein said damage factor is a vibration factor.