Lubrication monitoring system
US5038893A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1989 |
| Grant date | Aug 13, 1991 |
| Priority date | — |
| Expiry date | Sep 25, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16N29/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Control system for measuring/detecting transient fluid flow in a positive displacement pump lubrication system using time-differential pressure measurements. A pressure-actuated transducer for a captive oil column in the injection circuit imparts a proportional voltage signal to an electronically differentiating high pass filter, rendering it independent of any base line steady-state component. The resultant signal is fed into a comparator used to discriminate rates of pressure change against a preset reference level, thereby sensing transient spike pressures covering a wide range of adjustable frequencies and pump displacement strokes to thereby confirm required lubrication flow. The same transducer voltage signal transmitted during a steady-state portion of the pump cycle between injections is monitored for high and low set points such as incident to downstream blockage or system leakage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.