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US 6,626,436 B2Granted
Monitoring seal system
AssigneeJohn Crane Inc.
InventorsGlenn G. Pecht, Guy Gardner Williamson
Life of this patent
Estimating the term…
Abstract
A monitoring seal system comprises a seal housing, a seal assembly, a temperature sensor and a controller. The seal assembly sealingly engages a rotary shaft to prevent fluid leakage between the shaft and the housing. The seal assembly has at least one seal. The seal has a primary ring and a mating ring. The temperature sensor senses the temperature in the vicinity of the seal. The controller determines whether an upset condition has occurred based on at least the temperature in the vicinity of the seal.
Claims36
A monitoring seal system comprising:
- a seal housing;
- a seal assembly for sealingly engaging a rotary shaft to prevent fluid leakage between the shaft and the housing, said seal assembly having at least one seal, said seal having a primary ring and a mating ring;
- a temperature sensor for sensing temperature in vicinity of said seal;
- an input unit for manually and adjustably inputting a set value of a temperature or a set constant for determining an upset condition;
- and
- a controller capable of receiving, storing and analyzing data, attached to said input unit to receive input therefrom and for receiving a signal from said temperature sensor, for comparing to said input value thereby determining whether an upset condition has occurred based on at least said temperature in vicinity of said seal and said set temperature or set constant input into said input unit.
3 more elements
A monitoring seal system comprising:
- a seal housing;
- a seal assembly for sealingly engaging a rotary shaft to prevent fluid leakage between the shaft and the housing, said seal assembly having at least one seal, said seal having a primary ring and a mating ring;
- a temperature sensor for sensing temperature in vicinity of said seal;
- an input unit for manually and adjustably inputting a set value of a temperature or a set constant for determining an upset condition;
- and
- a controller capable of receiving, storing and analyzing data, attached to said input unit to receive input therefrom and for receiving a signal from said temperature sensor, for comparing to said input value thereby determining whether an upset condition has occurred based on at least said temperature in vicinity of said seal and said set temperature or set constant input into said input unit
- said assembly further having a second seal, said seal and said second seal defining an intermediate zone between the two seals, the seal system further comprising a temperature sensor for sensing temperature in vicinity of said second seal and a temperature sensor for sensing temperature in the intermediate zone, wherein said input unit is capable of manually and adjustably inputting a set value for a temperature in the vicinity of said second seal and a value for a temperature in said intermediate zone or a set constant, and said controller receives data from said sensors in the vicinity of said second seal and said intermediate zone and determines whether an upset condition has occurred based on at least said temperature in vicinity of said seal, temperature in vicinity of said second seal and temperature in intermediate zone.
4 more elements
A monitoring system comprising:
- a seal housing;
- sa seal assembly for sealingly engaging a rotary shaft to prevent fluid leakage between the shaft and housing, said seal assembly having two seals defining an intermediate zone of said seal system between the two seals;
- a temperature sensor for sensing temperature in said intermediate zone;
- an input unit for manually and adjustably inputting a set value of a temperature or a set constant for determining an upset condition;
- and
- a controller capable of receiving, storing and analyzing data, attached to said input unit to receive input therefrom and for receiving a signal from said temperature sensor for comparison to said input value thereby determining whether an upset condition has occurred based on at least said temperature in said intermediate zone and said set temperature or set constant input into said input unit.
3 more elements
A monitoring seal system comprising:
- a seal housing;
- a seal assembly for sealingly engaging a rotary shaft to prevent fluid leakage between the shaft and housing, said seal assembly having two seals defining an intermediate zone of said seal system between the two seals;
- a pressure sensor for sensing pressure in said intermediate zone;
- an input unit for manually and adjustably inputting a set value of a pressure or a set constant for determining an upset condition;
- and
- a controller capable of receiving, storing and analyzing data, attached to said input unit to receive input therefrom and for receiving a signal from said pressure sensor, for comparing to said input value thereby determining whether an upset condition has occurred based on at least said pressure in said intermediate zone and said set pressure or set constant input into said input unit.
3 more elements
A method for monitoring a seal system having a rotating shaft, a seal housing and a seal assembly having at least one seal, said seal having a primary ring and one mating ring, said seal assembly sealingly engaging the rotating shaft to prevent fluid leakage between the shaft and housing;
- the method comprising the steps of:
- providing a sensor selected from the group consisting of sensor for sensing temperature in vicinity of said seal, sensor for sensing baseline temperature and sensor for sensing baseline pressure;
- providing an input unit for manually and adjustably inputting a set value of a temperature, a set pressure, or a set constant for determining n upset condition;
- providing a controller capable of receiving, storing analyzing data attached to the input unit to receive input therefrom and for receiving a signal from said sensor;
- and comparing
- said transmitted data to said input value for determining whether an upset condition has occurred based on at least said data transmitted from said sensor and said set temperature, set pressure, or set constant input into said input unit.
3 more elements
A method for monitoring a seal system having a rotating shaft, a seal housing and a seal assembly having first and second seals defining an intermediate zone of said seal system between the two seals, each of said seals having one primary ring and one mating ring, said seal assembly located in said seal housing for sealingly engaging the rotating shaft to prevent fluid leakage between the shaft and housing, the method comprising the steps of:
- providing a sensor selected from the group consisting of sensor for sensing temperature in vicinity of said first seal, sensor for sensing temperature in vicinity of said second seal, sensor for sensing temperature in said intermediate zone, sensor for sensing pressure in said intermediate zone, sensor for sensing baseline temperature and sensor for sensing baseline pressure;
- providing an input unit for manually and adjustably inputting a set value of a temperature, a set pressure, or a set constant for determining an upset condition;
- providing a controller capable of receiving, storing and analyzing data, said controller attached to said input unit to receive input therefrom and for receiving a signal from said sensor
- transmitting data from said sensor to said controller;
- and
- said controller mathematically comparing said sensed data to said set data for determining whether an upset condition has occurred based on at least said data transmitted from said sensor and said set temperature, set pressure or set constant input into said input unit.
3 more elements
Dependencies are inferred from the claim text.