Machine component diagnostic system

• US 4,658,638 A
• Filed: 07/07/1986
• Issued: 04/21/1987
• Est. Priority Date: 04/08/1985
• Status: Expired due to Fees

• Current Assignee: Nordberg Inc (Metso Corporation)
• Original Assignee: Rexnord Corporation
• Inventors: Plahmer, Thomas G.
• Primary Examiner(s): Levy, Stewart J.
• Assistant Examiner(s): Roskos, Joseph W.
• Application Number:
  US06/882,324
• Time in Patent Office: 288 Days
• Field of Search: 73/64, 73/7, 73/10, 340/682, 340/679, 436/7
• US Class Current: 73/7
• CPC Class Codes: F16N 2200/16 using tracers
• CPC Class Codes: F16N 2250/04 Pressure
• CPC Class Codes: F16N 2250/08 Temperature
• CPC Class Codes: F16N 2250/16 Number of revolutions, RPM
• CPC Class Codes: F16N 2250/30 Dialectricum
• CPC Class Codes: F16N 2260/02 Indicating
• CPC Class Codes: F16N 29/00 Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems
• CPC Class Codes: G07C 3/00 Registering or indicating the condition or the working of machines or other apparatus, other than vehicles

Abstract

A machine condition diagnostic system is provided wherein machine components or their immediate surroundings are labelled with indicator materials. A normal level of indicators in the lubricant will be established. The lubricant is monitored and periodically sampled to determine the presence of abnormal levels in the amount of indicator material. Since each component or components performing a similar function will be labelled with the same indicator, the presence of a particular indicator in abnormal amounts in the lubricant will direct the machine operator to the precise location requiring repair or replacement.

Claims

1. In a system for monitoring a machine having an internal circulating fluid and various replaceable, wearable components, such that the fluid is common to said wearable components, the process of monitoring the condition of circulating fluid to pinpoint malfunctioning components comprising:

(a) distributing a distinct trace element indicator material in close proximity to each wearable component;

(b) establishing acceptable cumulative levels of indicators from all wearable components in said fluid;

(c) sampling said fluid; and

(d) analyzing said sample of said fluid by means capable of distinguishing between various indicators to detect the presence and changes in the amount of the particular indicator or indicators which signify a specific malfunctioning component.

2. The machine condition diagnostic process described in claim 1, wherein said trace element indicator is heat-sensitive.

3. The machine condition diagnostic system described in claim 1, further including distributing said indicator on a non-wearable component.

4. The machine condition diagnostic process defined in claim 1, wherein said indicator-bearing components are bearings.

5. The machine condition diagnostic process defined in claim 1, further including distributing a distinct indicator to identify a function-specific class of components.

6. The machine condition diagnostic process defined in claim 1, further including analyzing said sample of fluid by spectrochemical means.

7. The machine condition diagnostic process defined in claim 1, wherein said circulating fluid is hydraulic fluid.

8. The process of monitoring the condition of machine lubricant to pinpoint malfunctioning wearing components comprising:

(a) uniformly distributing at least one distinct temperature-specific trace element indicator material in close proximity to each type of component, so that the component or components performing a specific function such as main shaft bearings, all have the same indicator;

(b) establishing acceptable levels of said trace elements in the machine lubricant;

(c) monitoring said bearing lubricant for an unacceptable change in the level of contaminants;

(d) demonstrating said unacceptable change by warning means;

(e) sampling said lubricant; and

(f) analyzing said samples of said lubricant by spectrochemical analysis or other means capable of detecting the presence of the particular indicator or indicators which signify a specific malfunctioning bearing or bearings.

9. The machine condition diagnostic process defined in claim 8, wherein the machine lubricant is hydraulic fluid.

10. The machine condition diagnostic process defined in claim 8, further including providing each of said components with multiple indicator materials located directly adjacent to each other.

11. The machine condition diagnostic process defined in claim 10, wherein each of said different indicator materials has a distinct and distinguishable melting point.

12. The machine condition diagnostic process defined in claim 10, wherein said indicator materials are laminated to each other.

13. The machine condition diagnostic process defined in claim 12, wherein said laminated indicators are stacked in order of increasing temperature sensitivity.

14. The machine condition diagnostic process defined in claim 8 further including distributing said indicator on a non-wearable component.