发明名称 |
Method and apparatus for detecting abnormal metal-to-metal contact in a journal bearing |
摘要 |
This invention provides a method and apparatus for early detection of wiping contact between a rotating shaft and bearing metal in a flow lubricated bearing. In one form of the invention, a temperature sensor is provided to monitor bearing temperature at a location on the bearing in proximity to the maximum loading position. The sensor signal is sampled periodically by a plurality of sample and hold circuits so that present and immediately past values of the bearing temperature are always on hand. The sampled values are applied to a set of subtracters, each one of which provides a signal representing the difference between two consecutively sampled temperature values. Selected ones of the temperature differences are applied to summers and the largest sum is selected by a high-value selector and compared with a preselected setpoint value representing an excessive temperature change for a given time period. Based on the comparison, a decision is automatically made as to whether the bearing temperature at the sensed location is increasing at an excessively rapid rate, found to be indicative of a temperature "spike" which in turn is evidence of metal-to-metal contact in the bearing.
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申请公布号 |
US4460893(A) |
申请公布日期 |
1984.07.17 |
申请号 |
US19820346934 |
申请日期 |
1982.02.08 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
THOMAS, DANIEL A.;MALONE, PAUL E.;GOTH, GARY F. |
分类号 |
G01M13/04;F16C17/24;G01K7/00;(IPC1-7):G08B21/00 |
主分类号 |
G01M13/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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