Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16N—LUBRICATING
  • F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
  • F16N7/38—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pump; Central lubrication systems
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16N—LUBRICATING
  • F16N29/00—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
  • F16N29/02—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 for influencing the supply of lubricant
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16N—LUBRICATING
  • F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
  • F16N7/38—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pump; Central lubrication systems
  • F16N7/385—Central lubrication systems
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16N—LUBRICATING
  • F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
  • F16N7/38—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pump; Central lubrication systems
  • F16N7/40—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pump; Central lubrication systems in a closed circulation system
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
  • F16C33/30—Parts of ball or roller bearings
  • F16C33/66—Special parts or details in view of lubrication
  • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
  • F16C33/6659—Details of supply of the liquid to the bearing, e.g. passages or nozzles
  • F16C33/6674—Details of supply of the liquid to the bearing, e.g. passages or nozzles related to the amount supplied, e.g. gaps to restrict flow of the liquid
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16N—LUBRICATING
  • F16N13/00—Lubricating-pumps
  • F16N13/02—Lubricating-pumps with reciprocating piston
  • F16N13/06—Actuation of lubricating-pumps
  • F16N2013/063—Actuation of lubricating-pumps with electrical drive
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16N—LUBRICATING
  • F16N2210/00—Applications
  • F16N2210/14—Bearings
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16N—LUBRICATING
  • F16N2250/00—Measuring
  • F16N2250/04—Pressure
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16N—LUBRICATING
  • F16N2250/00—Measuring
  • F16N2250/40—Flow
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16N—LUBRICATING
  • F16N2270/00—Controlling
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16N—LUBRICATING
  • F16N2270/00—Controlling
  • F16N2270/50—Condition
  • F16N2270/56—Temperature
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16N—LUBRICATING
  • F16N2270/00—Controlling
  • F16N2270/70—Supply

Definitions

• Lubricating oil station for a plant and method for operating a lubricating oil station
• the invention relates to a lubricating oil station for supplying a unit with oil, in particular lubricating oil comprising an oil reservoir that can be filled with oil, a pump which is fluidically connected to the oil reservoir, the pump being coupled to a drive, the drive being designed in such a way that the Speed of the pump is variable, also a system that can be supplied with oil from the oil reservoir via the pump, and a line that establishes a fluidic connection between the pump and the unit.
• a lubricating oil station is used, among other things, to supply oil to a system, such as a slide bearing of a turbomachine, such as a compressor or a steam turbine.
• a system such as a slide bearing of a turbomachine, such as a compressor or a steam turbine.
• a slide bearing the slide-mounted rotor rotates on a lubricating film in a bearing shell.
• a plain bearing can experience power loss caused by friction. The friction losses result from the radial and axial bearings.
• the lubricating film comprises a lubricating medium, typically using oil.
• the oil is constantly supplied to the plain bearing via oil pumps.
• the oil is also fed out of the slide bearing via outlet channels.
• the oil supply is designed in such a way that the plain bearing is basically oversupplied with oil so that the friction partners, the rotor and bearing shell, do not rub directly on each other.
• the oversupply of oil is due to the fact that insufficient lubrication conditions of the plain bearing can only be approximately simulated, in particular the influence of insufficient lubrication on the dynamic bearing properties, such as e.g. B. with shaft vibrations. Furthermore, the oversupply of oil is also due to the fact that the rotors are loaded under different load conditions.
• Plain bearings are used, for example, to store rotors of, for example, steam turbines, gas turbines or compressors and generators.
• a slide bearing In a slide bearing, the slide-mounted rotor rotates on a lubricating film in a bearing shell.
• a plain bearing can experience power loss caused by friction. The friction losses result from the radial and axial bearings.
• the lubricating film comprises a lubricating medium, typically using oil.
• the oil is constantly supplied to the plain bearing via oil pumps.
• the oil is also fed out of the slide bearing via outlet channels.
• the oil supply is designed in such a way that the plain bearing is basically oversupplied with oil so that the friction partners, the rotor and bearing shell, do not rub directly on each other.
• the oversupply of oil is due to the fact that insufficient lubrication conditions of the plain bearing can only be approximately simulated, in particular the influence of insufficient lubrication on the dynamic bearing properties, such as e.g. B. with shaft vibrations. Furthermore, the oversupply of oil is also due to the fact that the rotors are loaded under different load conditions.
• a lubricating medium inflow is formed for each plain bearing.
• a speed of the oil pump is fixed and is therefore not variable. Nevertheless, the amount of oil is regulated. This is done through a bypass line that directs a portion of the oil around the oil pump.
• a controllable valve is arranged in this bypass line, which can regulate the quantity and the pressure in the oil line.
• a control unit is therefore provided which regulates the position of the valve.
• This control unit is linked to input signals such as pressure and flow rate.
• the control unit is coupled with the valve via output signals.
• the oil requirement is thus set in an optimized manner via the position of the valve, with the valve in turn being controlled via the control unit.
• a lubricating oil station for supplying a unit with oil, in particular lubricating oil comprising an oil reservoir that can be filled with oil, a pump which is fluidically connected to the oil reservoir, the pump being coupled to a drive, the drive being designed in such a way that the speed of the pump is variable, furthermore a system that can be supplied with oil from the oil reservoir via the pump, further a line that establishes a fluidic connection between the pump and the unit, with a control unit, the control unit being designed in this way that this is connected to at least one input signal and the control unit generates an output signal with which the speed of the pump is controlled.
• An essential aspect of the invention is to form a lubricating oil station without a bypass line.
• the invention is based on the idea of not regulating the required amount and the required pressure of oil by the bypass valve, but by a variable-speed pump.
• the variable-speed pump is connected to a control unit, with which the pump is controlled in such a way that the quantity of oil and the pressure in the oil are optimized and designed for when required.
• the pump is designed as a displacement pump.
• the medium is conveyed through self-contained volumes, and valves or valves prevent backflow flaps, other media or their shape achieved by gravity.
• the output signal is connected to an input of a frequency converter, the output of the frequency converter being connected to the pump, so that the speed can be changed via the frequency converter.
• a frequency converter is a power converter that uses AC voltage to generate an AC voltage with variable frequency and amplitude for the direct supply of electrical machines such as three-phase motors.
• the use of a frequency converter offers many advantages.
• the speed of the pump can be easily adjusted via the frequency converter, which controls a three-phase motor.
• the pressure in the line is used as the input signal.
• the amount of oil in the line can also be used.
• the system is designed as a bearing, in particular a sliding bearing.
• the use of a speed-controlled pump is optimal.
• the object is also achieved by a method for operating a lubricating oil station designed as described above.
• FIG. 1 a schematic representation of a lubricating oil station according to the prior art
• Figure 2 a schematic representation of a lubricating oil station according to the invention
• FIG. 1 shows a schematic representation of a lubricating oil station 1 according to the prior art.
• the lubricating oil station 1 includes an oil reservoir 2 that can be filled with oil.
• the oil reservoir 2 is fluidically connected to a pump 4 via a first line 3 .
• the pump 4 is preferably designed as a displacement pump.
• a second line 5 which establishes a fluidic connection between the pump 4 and an intermediate cooler 6 .
• the oil flowing out of the oil reservoir 2 is cooled in this intermediate cooler 6 .
• the oil flowing out of the intercooler 6 then flows via a third line 7 to a system that is not shown in detail.
• This system can be designed as a slide bearing.
• the plain bearing in turn, can be a sliding bearing for a turbomachine, such as a steam turbine or a compressor.
• the plain bearing is fluidically connected to the third line 7 via supply nozzles 8 .
• the flow connectors 8 are shown only schematically in the figures.
• the oil returns from the system to the oil reservoir 2 via a return, which is not shown in detail. This is done via a fourth line 9.
• a measuring transducer 10 is arranged in the third line 7 .
• the sensor 10 measures the pressure of the oil in the third line 7 and the flow rate of the oil in the third line 7. Further measurements of physical parameters, such as the temperature, are possible.
• An oil filter 21 is also arranged in the third line 7 . Due to the pollution that changes over time, the oil filter 21 acts as a “disturbance variable” for the control.
• the pressure and the flow rate of the oil are transmitted as input signals 11 to a first control unit 12 .
• the first control unit 12 is connected to a valve 13 .
• the valve 13 is arranged in a bypass line 14 .
• the bypass line 14 fluidically connects the second line 5 to the fourth line 9.
• the position of the valve 13 is adjusted via the first control unit 12 .
• the amount of oil required by the system is thus set via the position of valve 13.
• the pump 4 can be operated at one speed with a stable speed.
• a pressure relief valve 16 is arranged around the pump 4 via a further second bypass line 15 . In the event of a malfunction, the pressure in the second line 5 may be too high, for example, and in order to prevent damage to the pump 4, the pressure relief valve 16 opens so that the pressure in the second line 5 is relieved.
• Figure 2 shows a schematic representation of a lubricating oil station 1 according to the invention.
• the difference between the lubricating oil station 1 according to FIG. 1 and the lubricating oil station 1 according to FIG. 2 is, among other things, that the first bypass line 14 can be omitted.
• the amount and the pressure of the oil in the third line 7 is regulated according to the invention via the speed of the pump 4 .
• the pump 4 is connected to a drive 17, the drive being designed as a motor.
• the speed of the motor is linked to the speed of the pump 4 .
• the speed of the pump 4 can be changed with the speed of the engine.
• the motor is coupled to a frequency converter 18 .
• the speed of the motor is changed with the frequency converter 18 .
• the lubricating oil station also includes a control unit 19.
• This control unit 19 is connected to input signals 20 on the one hand. These input signals 20 determine, for example, the quantity and the pressure of the oil in the third line 7.
• the control unit 19 is also connected to output signals 21.
• the frequency converter 18 is controlled with output signals 21 .
• the control unit 19 is designed in such a way that, via the measured input signals 20 , output signals 21 are generated which are adapted to the requirements of the system and lead to an optimal speed of the pump 4 . In other words: the pressure and the quantity in the third line 7 is regulated via the speed of the pump 4 applies, the speed being regulated via the control unit 19 .
• the amount of oil required for the system is thus determined with the control unit and pumped to the system via the pump with speed control.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Sliding-Contact Bearings (AREA)
• Compressor (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=77864539

Family Applications (1)

Country Status (4)

Family Cites Families (13)

• 2020
  • 2020-09-29 CN CN202022199789.1U patent/CN214467751U/zh active Active
• 2021
  • 2021-09-03 EP EP21773495.3A patent/EP4168704A1/de active Pending
  • 2021-09-03 US US18/025,902 patent/US20230349511A1/en active Pending
  • 2021-09-03 CN CN202180064894.9A patent/CN116194704A/zh active Pending
  • 2021-09-03 WO PCT/EP2021/074352 patent/WO2022069152A1/de unknown

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