Wearing part diagnostic system employing tracer elements
AssigneeRexnord Inc.
InventorThomas G. Plahmer
Life of this patent
Estimating the term…
Abstract
A machine condition diagnostic system is provided wherein machine components are labelled with indicator materials. A normal level of indicators in the lubricant will be established. The lubricant is monitored and periodically or continually 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.
Claims12
In a system for monitoring a machine having an internal lubrication system and various replaceable wearable components, such that the lubricant is common to all components, the process of monitoring the condition of machine lubricant to pinpoint malfunctioning components comprising:
- (a) distributing a distinct trace element indicator material in each wearable component;
- (b) establishing acceptable cumulative levels of indicators from all wearable components in said lubricant;
- (c) sampling said lubricant;
- and
- (d) analyzing said sample of said lubricant 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.
The process of monitoring the condition of bearing lubricant to pinpoint malfunctioning machine components comprising:
- (a) uniform distributing a distinct trace element indicator material in each type of bearing, so that the bearing or bearings performing a specific function such as main shaft bearings, all have the same indicator;
- (b) establishing acceptable levels of trace elements in the bearing lubricant;
- (c) monitoring said bearing lubricant for an unacceptable change in the level of contaminants by measuring changes in the dielectric constant of the lubricant;
- (d) demonstrating said unacceptable change by warning means;
- (e) sampling said lubricant;
- and
- (f) analyzing said sample 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.
The process of monitoring machine bearing lubricant condition to pinpoint malfunctioning bearings comprising:
- (a) drilling a bore into the race surface of each bearing in a machine to beyond the depth of maximum acceptable wear;
- (b) inserting a pill comprised of an indicator material into the bottom of said bore so that each bearing function is represented by a different indicator pill;
- (c) sealing said bore;
- (d) establishing acceptable levels of indicator materials in the bearing lubricant;
- (e) monitoring said lubricant for an unacceptable change in the level of contaminants;
- (f) sampling said lubricant;
- and
- (g) analyzing said sample of said unacceptably contaminated lubricant by quantitative chemical analysis to detect the presence of the particular indicator or materials, which identify a specific malfunctioning component.
Dependencies are inferred from the claim text.