WO2021196829A1 - 一种交流油泵变频控制润滑油系统 - Google Patents

一种交流油泵变频控制润滑油系统 Download PDF

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Publication number
WO2021196829A1
WO2021196829A1 PCT/CN2021/071408 CN2021071408W WO2021196829A1 WO 2021196829 A1 WO2021196829 A1 WO 2021196829A1 CN 2021071408 W CN2021071408 W CN 2021071408W WO 2021196829 A1 WO2021196829 A1 WO 2021196829A1
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Prior art keywords
oil
module
bearing
central control
control module
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PCT/CN2021/071408
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English (en)
French (fr)
Inventor
张红日
高卫华
王秋宝
郭艳妮
薛光耀
印洪兴
朱伟华
Original Assignee
江苏江海润液设备有限公司
上海电气电站设备有限公司
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Application filed by 江苏江海润液设备有限公司, 上海电气电站设备有限公司 filed Critical 江苏江海润液设备有限公司
Priority to DE112021000001.2T priority Critical patent/DE112021000001T5/de
Publication of WO2021196829A1 publication Critical patent/WO2021196829A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/02—Pumping installations or systems having reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F04B49/065—Control using electricity and making use of computers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B51/00—Testing machines, pumps, or pumping installations
    • 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
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/12—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load
    • F16C17/24—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with devices affected by abnormal or undesired positions, e.g. for preventing overheating, for safety
    • F16C17/243—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with devices affected by abnormal or undesired positions, e.g. for preventing overheating, for safety related to temperature and heat, e.g. for preventing overheating
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • F16C19/525—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to temperature and heat, e.g. insulation
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • F16C19/527—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to vibration and noise
    • 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
    • F16C33/6666—Details of supply of the liquid to the bearing, e.g. passages or nozzles from an oil bath in the bearing housing, e.g. by an oil ring or centrifugal disc
    • 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
    • F16C33/667—Details of supply of the liquid to the bearing, e.g. passages or nozzles related to conditioning, e.g. cooling, filtering
    • 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
    • F16C37/00—Cooling of 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C37/00—Cooling of bearings
    • F16C37/007—Cooling of bearings of rolling 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • 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
    • 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
    • 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
    • F16N29/04—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 enabling a warning to be given; enabling moving parts to be stopped
    • 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
    • F16N39/00—Arrangements for conditioning of lubricants in the lubricating system
    • F16N39/02—Arrangements for conditioning of lubricants in the lubricating system by cooling
    • 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
    • F16N39/00—Arrangements for conditioning of lubricants in the lubricating system
    • F16N39/04—Arrangements for conditioning of lubricants in the lubricating system by heating
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/04—Bearings
    • G01M13/045—Acoustic or vibration analysis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/05—Pressure after the pump outlet
    • 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
    • F16C2233/00—Monitoring condition, e.g. temperature, load, vibration
    • 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
    • F16C2360/00—Engines or pumps
    • 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
    • F16N2250/08—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
    • F16N2260/00—Fail safe
    • F16N2260/32—Pump failure

Definitions

  • the invention relates to the technical field of lubrication systems, in particular to an AC oil pump frequency conversion control lubricating oil system.
  • the lubricating oil system provides lubricating oil with stable pressure, flow and temperature for large-scale rotating shaft host equipment to ensure that the host equipment operates under stable and good working conditions.
  • the components attached to the system generally adopt a one-use-one-preparation method to ensure that the spare components can be put into use in time when the in-use components fail to ensure the continuous and safe operation of the host equipment.
  • the lubricating oil pump adopts the scheme of "2 ⁇ 100% main oil pumps driven by AC motors (standby each other), 1 ⁇ 100% critical oil pumps driven by DC motors". The oil is supplied by the AC main oil pump during normal operation. When the AC power fails and the AC main oil pump cannot work normally, the emergency oil pump is driven by the DC motor to supply oil to the system.
  • a thermal power generating unit steam turbine lubrication system which includes a main pump lubrication unit.
  • the main pump lubrication unit includes: a main pump, an oil injector, a main pump check valve, Oil cooler, one end of the oil cooler is connected with the one-way valve of the main pump, and the other end of the oil cooler leads to the parts to be lubricated through the oil pipe;
  • the steam turbine lubrication system of the thermal power generator set also includes an AC pump lubrication unit and a DC pump lubrication unit.
  • the AC pump lubrication unit is activated to meet the oil supply needs of the system.
  • the DC lubrication unit is activated, and the DC pump outlet bypasses the oil cooler to prevent oil cooler failure and bearing oil burnout, improving the safety and reliability of the unit.
  • the known technology has the following drawbacks: in the process of controlling the oil pump switching in the above technical solution, the oil supply oil pressure fluctuates due to the oil pump switching delay, which brings danger to the operation of the unit.
  • the purpose of the present invention is to provide an AC oil pump frequency conversion control lubricating oil system, which has the advantages of seamless switching when the oil pump fails and reducing oil pressure fluctuations.
  • a frequency conversion control lubricating oil system for an AC oil pump includes a unit, an oil tank, and an oil supply pipeline connected to a bearing of the unit.
  • the frequency conversion device is connected with a central control module for outputting frequency conversion signals to the frequency conversion device to adjust the output frequency and then adjust the output flow rate of the oil supply module;
  • the central control module is provided with an oil pump detection unit for detecting the working status of the oil supply module.
  • the fuel supply pipeline is provided with a pressure detection module for detecting fuel supply pressure and outputting a pressure signal to the central control module to trigger the oil pump detection unit.
  • the fuel pump detection unit is used to output a switching signal to the central control unit when it detects that the fuel supply module is damaged.
  • the control module triggers the central control module to output variable frequency signals.
  • the pressure detection module detects that the pressure becomes low and transmits a signal to the central control module.
  • the central control module detects the working status of the AC variable frequency oil pump in the fuel supply module and passes the variable frequency device when the AC variable frequency oil pump fails. Change the operating frequency of the fuel supply module to adjust the output power of the fuel supply module, thereby realizing seamless switching between AC and DC power sources, without affecting the operation of the oil pump motor, and ensuring stable pipeline pressure.
  • the output state of the oil pump is automatically configured, which can respond quickly, so that there is no large fluctuation in the pipeline pressure, ensure the continuous uninterrupted oil supply of the unit, and improve the safety factor of the unit.
  • the frequency conversion device is connected with an inverter module for providing power to the fuel supply module
  • the inverter module includes a filter device, an inverter device and a conversion switch, and the input end of the filter device is connected to an AC power source
  • the output terminal of the filter device is connected to a transfer switch, the transfer switch is connected to an inverter device, and the inverter device is connected to a DC power supply.
  • the setting of the switch is convenient to automatically switch the power supply of the fuel supply module to a DC power supply when the AC power fails, so as to ensure that the fuel supply module can realize uninterrupted oil supply even in the case of a power failure of the AC grid;
  • it solves the problem that only the DC oil pump can be used in the lubrication system when the AC grid is out of power, eliminates the dependence on the DC oil pump, and facilitates the unified management of the entire lubrication system; in addition, the auxiliary charging function of the inverter device can Convert AC power into DC power and store it in DC power supply.
  • the present invention is further configured as: the DC power supply and the AC power supply are connected in parallel to jointly supply power to the variable frequency device.
  • the battery is set up to facilitate the storage of DC power, so that it can be flexibly switched under the action of the switch; the battery is set to ensure that the fuel supply module outputs a stable and continuous voltage when the AC grid is out of power, thereby ensuring Stable and continuous operation of the fuel supply module; the battery can also be charged when the AC grid is working normally.
  • the present invention is further provided as follows: a bearing temperature detection device is provided at the bearing of the unit, the bearing temperature detection device is connected to the central control module, and one end of the oil supply pipeline close to the bearing is provided with a controlled central control module to follow The bearing flow adjustment device that adjusts the flow rate due to temperature changes.
  • the bearing temperature detection device facilitates the detection of the temperature of the bearing.
  • the central control module adjusts the flow rate of the lubricating oil flowing through the bearing by controlling the flow rate of the bearing flow adjustment device when the bearing temperature changes, so that the heat at the bearing can be adjusted. It can be taken away by the lubricating oil to adjust the heat dissipation efficiency at the bearing.
  • the central control module is provided with a bearing flow control unit
  • the bearing flow control unit is provided with an adjustment coefficient
  • the bearing flow control unit is used to control the opening of the bearing flow adjustment device according to the adjustment coefficient.
  • the adjustment coefficient k is changed according to the data detected by the bearing temperature detection device, and then the opening of the bearing flow adjustment device is adjusted, and the signal is sent to the bearing flow adjustment device, thereby realizing the control of the flow at the bearing.
  • the oil supply pipeline is provided with a pipeline pressure detection device and a bearing pressure detection device for detecting the opening of the bearing flow adjustment device, and the pipeline pressure detection device and the bearing pressure detection device are both connected to the center Control module.
  • the pipeline pressure detection device and the bearing pressure detection device respectively detect the pressure of the pipeline at both ends of the bearing flow adjustment device and transmit it to the central control module, which supplies oil to both ends of the bearing flow adjustment device.
  • the pressure in the pipeline is processed to detect the opening of the bearing flow adjustment device, which can be compared with the adjustment coefficient set by the bearing flow control unit to determine whether the bearing flow adjustment device is normal.
  • the oil supply pipeline is provided with an oil temperature detection module for detecting the oil temperature and outputting an oil temperature signal to the central control module
  • the oil supply pipeline is also provided with a cooling device
  • the cooling device enters
  • the water pipe is provided with a water volume adjusting device, which is connected to the central control module to receive a water volume signal from the central control module to control the cooling rate.
  • the oil temperature detection module facilitates the detection of the lubricating oil temperature in the oil supply pipeline, and the central control module controls the water volume adjustment device on the cooling device according to the oil temperature, so as to realize the adjustment of the oil temperature cooling speed
  • the oil temperature of the lubricating oil is controlled within the working range of the bearing, which is convenient for the lubricating oil to be pumped to the bearing to take away the heat from the bearing and dissipate it.
  • the present invention is further provided that: a bearing vibration detection device is provided at the bearing of the unit, and the bearing vibration detection device is connected to the central control module.
  • the bearing vibration detection device is convenient to detect the vibration of the bearing and transmit the data to the central control module.
  • the central control module compares the detected signal with the normal vibration signal of the unit. When the vibration range exceeds the normal range An alarm signal is issued at the time to remind the operator that there may be a fault in the bearing of the unit, and timely maintenance should be carried out.
  • the present invention is further configured as: the central control module is provided with a communication module, and the communication module is used to communicate with the frequency conversion device through the Profibus-DP communication protocol.
  • the Profibus-DP communication system is an optimized module with a higher data transmission rate, suitable for communication between the system and external equipment, and also suitable for time-critical automation control systems Because the fuel supply module needs to work uninterruptedly and requires rapid response, the use of the Profibus-DP communication system is more suitable for the complex working environment of the fuel supply module.
  • the present invention is further configured as: the central control module is connected with an upper computer for displaying the working status of the oil supply module and a wireless transmission module for uploading the working status of the lubrication system to the cloud server.
  • the host computer can display the working status and working parameters of each component of the lubrication system in real time, and the wireless transmission module transmits the working status and working parameters of each component of the lubrication system to the cloud server through wireless transmission. , Realize remote intelligent monitoring and remote intelligent control through mobile terminals, and realize intelligent operation and maintenance.
  • bearing temperature detection device The technology of bearing temperature detection device, bearing flow adjustment device, bearing flow control unit, pipeline pressure detection device, bearing pressure detection device, oil temperature detection module, cooling device and water volume adjustment device is adopted to produce guaranteed bearings.
  • the present invention can adapt to the characteristics of small machine, small flow oil supply and fast and flexible operation, realizes the quick and flexible response and control of the lubricating oil system, and adopts the technology of the central control module, the upper computer and the wireless transmission module to make the oil supply
  • the system is easier to control, more stable, more energy efficient, and more intelligent.
  • Figure 1 is a schematic diagram of the overall structure of an AC oil pump variable frequency control lubricating oil system in an embodiment
  • Fig. 2 is a structural block diagram for presenting the control signal of the central control module in the embodiment.
  • An AC oil pump variable frequency control lubricating oil system includes a unit 1, an oil tank 14, and an oil supply pipeline 15 connected to the bearing 13 of the unit 1.
  • the unit 1 includes a turbine 11 and a tractor 12, and the turbine 11 and the tractor 12 are connected by a coupling and rotate synchronously.
  • the bearing 13 is provided with an oil inlet 132, an oil outlet 133, and an oil mist port 134.
  • the oil inlet 132 is connected with an oil supply line 15, and the oil outlet 133 is connected with an oil return line, so as to realize the circulation of lubricating oil and oil mist.
  • the port 134 is connected with an oil mist removal device 16 through a pipeline, and the oil mist removal device 16 is connected to the oil tank 14.
  • multiple sets of oil supply modules 2 are installed on the oil tank 14, in some embodiments, three sets are preferred, and the output power of each set of oil supply modules 2 is sufficient to maintain the operation of the lubrication system.
  • the oil supply module 2 includes an AC variable frequency oil pump 20, and the AC variable frequency oil pump 20 is driven by an AC variable frequency motor.
  • the fuel supply module 2 is connected with a frequency conversion device 21, and the frequency conversion device 21 is connected with a central control module 3 for outputting a frequency conversion signal to the frequency conversion device 21 to adjust the output frequency and then adjust the output flow of the fuel supply module 2.
  • the frequency conversion device 21 is an ABB-ACS880 inverter
  • the central control module 3 can be an industrial computer or a PLC controller, preferably a Siemens S7-300 PLC controller.
  • the central control module 3 sends a frequency conversion signal to the frequency conversion device 21, and the frequency conversion device 21 controls the output frequency output to the AC variable frequency oil pump 20 to control the output flow of the AC variable frequency oil pump 20.
  • the frequency conversion device 21 is also connected with an inverter module 22 for supplying power to the oil supply module 2.
  • the inverter module 22 includes a filter device 221, an inverter device 222 and a transfer switch 223.
  • the input end of the filter device 221 is connected to an AC power source, such as 380V AC for industrial use.
  • the output end of the filter device 221 is connected to the transfer switch 223, the transfer switch 223 is connected to the inverter device 222, and the inverter device 222 is connected to a DC power source, such as a 380V battery.
  • the DC power supply and the AC power supply are connected in parallel to supply power to the frequency conversion device 21 together, and the transfer switch 223 is used to automatically switch the power supply to the DC power supply when the AC power supply fails, thereby ensuring the uninterrupted oil supply of the oil supply module 2.
  • a pressure detecting module 151 for detecting the oil supply pressure and outputting a pressure signal to the central control module 3 to trigger the oil pump detecting unit 31 is installed on the oil supply pipeline 15.
  • the pressure detection module 151 is a pressure transmitter P2.
  • the pressure detection module 151 is connected to the central control module 3 to be controlled by the central control module 3 to detect the AC variable frequency oil pump 20 in the oil supply module 2.
  • the central control module 3 integrates an oil pump detection unit 31 used to detect the working status of the fuel supply module 2.
  • the oil pump detection unit 31 is used to detect whether the working status of the AC variable frequency oil pump 20 is consistent with the set working status. If not, the output oil pump will be damaged. The signal to the central control module 3.
  • the oil pump detection unit 31 when it is detected that the fuel supply module 2 is damaged, the oil pump detection unit 31 outputs a switching signal to the central control module 3 to trigger the central control module 3 to output a variable frequency signal.
  • the central control module 3 is when the AC variable frequency motor is damaged Increase the frequency of other AC variable frequency motors.
  • the three AC variable-frequency oil pumps 20 each work at an output power of 20%-40%; when one AC variable-frequency oil pump 20 fails, the remaining two AC variable-frequency oil pumps 20 operate at 40%-60%. When the two AC variable-frequency oil pumps 20 both fail, the remaining one AC variable-frequency oil pump 20 works with an output power of 95%-100% to ensure the uninterrupted oil supply of the lubrication system.
  • the central control module 3 is integrated with a communication module 32.
  • the central control module 3 communicates with the frequency conversion device 21 through the Profibus-DP communication protocol, thereby ensuring the stability of signal transmission and adapting to more complex lubrication systems. working environment.
  • a bearing temperature detection device 152 is installed at the bearing 13 of the unit 1, and the bearing temperature detection device 152 is connected to the central control module 3 to transmit temperature data to the central control module 3.
  • the bearing temperature detection device 152 is a temperature sensor.
  • a bearing flow adjustment device 4 controlled by the central control module 3 is installed at one end of the oil supply pipeline 15 close to the bearing 13.
  • the bearing flow adjustment device 4 is an intelligent control valve, which is controlled by the central control module 3 to adjust the opening of the intelligent control valve, thereby controlling the flow of lubricating oil flowing into the bearing 13.
  • a bearing flow control unit 33 is integrated inside the central control module 3 to test and collect the frequency-flow curve of the AC variable frequency oil pump 20 and draw the curve.
  • the bearing flow control unit 33 is provided with an adjustment coefficient k. Establish the equation Q(n) ⁇ kT(n), Q is the flow, T is the temperature, k is the adjustment coefficient, and k represents the opening of the bearing flow adjustment device 4.
  • the opening degree of the bearing flow adjustment device 4 is adjusted according to this corresponding relationship, so that the opening degree of the flow adjustment device is controlled by the bearing flow control unit 33 to improve the heat dissipation efficiency at the bearing 13.
  • a pipeline pressure detection device 153 and a bearing pressure detection device 154 for detecting the opening of the flow adjustment device are installed on the oil supply pipeline 15.
  • the pipeline pressure detection device 153 is installed at the end of the bearing flow adjustment device 4 far away from the bearing 13, and the bearing pressure detection device 154 is installed at the end of the bearing flow adjustment device 4 close to the bearing 13.
  • the pipeline pressure detection device 153 and the bearing pressure detection device 154 are both pressure sensors.
  • the central control module 3 calculates the actual opening degree of the bearing flow adjustment device 4 through the pressure difference between the two.
  • a temperature sensor T1 and a heater 17 are installed on the fuel tank 14.
  • the temperature sensor T1 detects the initial test oil temperature and transmits it to the central control module 3.
  • the central control module 3 activates the heater 17 to heat the lubricating oil inside the oil tank 14 when the temperature is lower than the preset value.
  • An oil temperature detection module 155 for detecting oil temperature and outputting an oil temperature signal to the central control module 3 is installed on the oil supply pipeline 15.
  • the oil temperature detection module 155 is a temperature sensor.
  • the oil temperature detection module 155 is that a cooling device 5 for cooling the lubricating oil in the oil supply line 15 is also installed on the oil supply line 15, such as an oil cooler.
  • a water volume adjusting device 51 is installed at the water inlet pipe of the cooling device 5, and the water volume adjusting device 51 is connected to the central control module 3 to receive a water volume signal from the central control module 3 to control the cooling rate.
  • the water volume adjustment device 51 is a water volume adjustment valve.
  • the bearing 13 of the unit 1 is equipped with a bearing vibration detection device 131, the bearing vibration detection device 131 is a vibration sensor, the bearing vibration detection device 131 is connected to the central control module 3, and the vibration sensor detects the vibration at the bearing 13 The vibration signal is sent to the central control module 3, and the central control module 3 issues an alarm when the vibration exceeds the threshold.
  • the central control module 3 is connected with an upper computer 6 for displaying the working status of the fuel supply module 2.
  • the upper computer 6 is a touch screen, which can not only display working data, but also input instructions to the central control module 3.
  • it also includes a wireless transmission module 34 for uploading the working status of the lubrication system to the cloud server.
  • the wireless transmission module 34 collects and uploads the various working status and working parameters of the lubrication system to the cloud, and receives remote operation instructions from the user , Make corresponding control operations on the lubrication system.
  • the temperature sensor T1 on the oil tank 14 detects the oil temperature.
  • the central control module 3 controls the heater 17 to heat the lubricating oil, thereby facilitating the startup of the lubricating system.
  • the oil temperature detection module 155 on the oil supply pipe 15 detects the oil temperature in the oil supply pipe 15, and controls the water volume adjustment device 51 to adjust the inlet of the cooling device 5 when the temperature is higher than the preset value. The water rate, thereby increasing the cooling rate of the cooling device 5.
  • the three oil supply modules 2 each pump lubricating oil with an output power of 20%-40%.
  • the transfer switch 223 automatically switches the power supply of the inverter module 22 to the inverter device 222 to supply power, and the DC power supply is inverted by the inverter device 222 to supply power to the AC variable frequency oil pump 20.
  • the pressure detection module 151 on the oil supply pipeline 15 detects the oil supply pressure and transmits the pressure signal to the central control module 3.
  • the central control module 3 detects the working state of the AC variable frequency oil pump 20 of the oil supply module 2 through the oil pump detection unit 31 when the pressure is lower than the preset value. When the AC variable frequency oil pump 20 is not faulty, the central control module 3 sends a signal to the variable frequency devices 21 corresponding to the three oil supply modules 2 so that the output power of the three variable frequency devices 21 is increased to 100%. If the pressure continues to drop, an alarm will be issued to remind the operator to overhaul. If one AC variable frequency oil pump 20 is damaged, the central control module 3 controls the remaining two AC variable frequency oil pumps 20 to work at about 50% output power. If two AC variable frequency oil pumps 20 are damaged, the central control module 3 controls the remaining AC variable frequency oil pump 20 to work with an output power of 95%-100%. In this way, when the oil pump fails, the seamless switching of the oil pump is ensured, and the oil pressure fluctuation caused by the oil pump switching is reduced, thereby improving the safety of the unit 1.
  • the bearing temperature detection device 152 detects the temperature at the bearing 13 and transmits the data to the central control module 3.
  • the bearing flow control unit 33 in the central control module 3 sends the corresponding control coefficient k to the bearing flow adjusting device 4 according to the calorific value of the bearing 13 to adjust the opening of the bearing flow adjusting device 4, thereby adjusting the lubrication flowing to the bearing 13
  • the amount of oil improves the heat dissipation efficiency of the bearing 13 and ensures the constant temperature of the bearing 13.
  • the central control module 3 detects and monitors the working status and working parameters of the entire system, and displays the data on the upper computer 6, so that the operator can grasp the working condition of the lubrication system in time. At the same time, the central control module 3 can also transmit all the working parameters and working status to the cloud server in the form of wireless data through the wireless transmission module 34, which is convenient for the operator to remotely view and remotely control.

Abstract

一种交流油泵变频控制润滑油系统，包括机组（1）、油箱（14）和连接于机组轴承（13）处的供油管路（15），油箱上设置有多组供油模块（2），供油模块均连接有变频装置（21），变频装置连接有中央控制模块（3），变频装置连接有逆变模块（22）；中央控制模块内部设置有油泵检测单元（31），供油管路上设置有用于检测供油压力并输出压力信号给中央控制模块以触发油泵检测单元的压力检测模块（151），油泵检测单元用于在检测到供油模块发生损坏时输出切换信号给中央控制模块输出变频信号。该系统达到了在油泵产生故障时无缝切换，降低油压波动的效果。

Description

一种交流油泵变频控制润滑油系统 技术领域
本发明涉及润滑系统的技术领域，尤其涉及一种交流油泵变频控制润滑油系统。
背景技术
润滑油系统为大型转轴类主机设备提供压力、流量、温度稳定的润滑油，以保证主机设备在稳定、良好的工况下运转。目前,为提升润滑油系统的可靠性，系统所附属的元件一般均采用一用一备的方式，以确保在用元件失效时，备用元件能及时投入使用，保证主机设备持续安全运转。润滑油泵采用“2×100％由交流电机驱动的主油泵(互为备用)，1×100％由直流电机驱动的危急油泵”方案。正常运行时由交流主油泵供油，当交流电源故障，交流主油泵不能正常工作时，由直流电机驱动危急油泵向系统供油。
在一种已知的技术中，公开了一种火力发电机组汽轮机润滑系统，包括主泵润滑单元，主泵润滑单元包括：用油管顺次连接的主泵、注油器、主泵单向阀、冷油器，冷油器的一端与主泵单向阀相连，冷油器的另一端通过油管通向待润滑件；火力发电机组汽轮机润滑系统还包括交流泵润滑单元和直流泵润滑单元。在机组启动和停机过程中，当主轴转速小于2700-2800r/min时，主泵润滑单元不能提供足够的油压和油流，此时启动交流泵润滑单元，以满足系统供油需要。当主泵润滑系统和交流泵润滑单元出现故障时，直流润滑单元启动，直流泵出口绕开冷油器，防止冷油器故障轴承断油烧瓦，提高机组运行安全性和可靠性。
然而，该已知技术中存在以下缺陷：在上述技术方案在控制油泵切换的过程中，因油泵切换延迟会导致供油油压产生波动，从而给机组的运行带来危险。
发明内容
针对现有技术存在的不足，本发明的目的在于提供一种交流油泵变频控制润滑油系统，其具有在油泵产生故障时无缝切换，降低油压波动的优势。
本发明的上述发明目的是通过以下技术方案得以实现的：
一种交流油泵变频控制润滑油系统，包括机组、油箱和连接于机组轴承处的供油管路，所述油箱上设置有多组供油模块，所述供油模块均连接有变频装置，所述变频装置连接有用于向变频装置输出变频信号以调整输出频率进而调整供油模块输出流量的中央控制模块；所述中央控制模块内部设置有用于检测供油模块工作状态的油泵检测单元，所述供油管路上设置有用于检测供油压力并输出压力信号给中央控制模块以触发油泵检测单元的压力检测模块，所述油泵检测单元用于在检测到供油模块发生损坏时输出切换信号给中央控制模块以触发中央 控制模块输出变频信号。
通过采用上述技术方案，压力检测模块检测到压力变低并传输信号给中央控制模块，中央控制模块对供油模块中的交流变频油泵的工作状态进行检测并在交流变频油泵发生故障时通过变频装置改变供油模块的工作频率以实现供油模块输出功率的调节，从而实现了交直流电源无缝切换，不影响油泵电机工作，确保管路压力稳定。根据油泵的异常情况、管路压力的异常情况，自动配置油泵的出力状态，能够快速反应，使管路压力没有大的波动，保证了机组的持续不间断供油，提高了机组的安全系数。
本发明进一步设置为：所述变频装置连接有用于给供油模块提供电源的逆变模块，所述逆变模块包括滤波装置、逆变装置和转换开关，所述滤波装置输入端连接于交流电源，所述滤波装置的输出端连接于转换开关，所述转换开关连接于逆变装置，所述逆变装置连接于直流电源。
通过采用上述技术方案，切换开关的设置便于在交流电源停电时自动将供油模块的供电电源切换为直流电源，从而保证了供油模块在交流电网停电的情况下也能够实现不间断供油；另一方面，解决了交流电网停电时只能有直流油泵投入润滑系统的问题，消除了对直流油泵的依赖，便于整个润滑系统的统一化管理；再者逆变装置自带的辅助充电功能能够将交流电转化为直流电存储在直流电源中。
本发明进一步设置为：所述直流电源与交流电源并联连接以共同为变频装置供电。
通过采用上述技术方案，蓄电池的设置便于将直流电进行储存，从而在切换开关的作用下灵活进行切换；蓄电池的设置能够保证在交流电网停电时为供油模块输出稳定且持续的电压，从而保证了供油模块的稳定、持续的工作；蓄电池在交流电网正常工作时还能够进行充电。
本发明进一步设置为：所述机组轴承处设置有轴承温度检测装置，所述轴承温度检测装置连接于中央控制模块，所述供油管路靠近轴承的一端设置有受控于中央控制模块以随温度变化调整流量的轴承流量调节装置。
通过采用上述技术方案，轴承温度检测装置便于对轴承的温度进行检测，中央控制模块在轴承温度变化时通过控制轴承流量调节装置的流量以调整流过轴承的润滑油流量，从而使得轴承处的热量能够被润滑油带走而调节了轴承处的散热效率。
本发明进一步设置为：所述中央控制模块内部设置有轴承流量控制单元，所述轴承流量控制单元设置有调节系数，所述轴承流量控制单元用于根据调节系数控制轴承流量调节装置的开度。
通过采用上述技术方案，轴承流量控制单元对供油模块中的交流变频油泵进行测试，得到交流变频油泵的频率—流量曲线，并根据曲线以及轴承处的散热特性建立方程Q(n)＝kT(n)，根据轴承温度检测装置检测所得数据改变调节系数k，进而调节轴承流量调节装置的开度，并将信号发送给轴承流量调节装置，从而实现了对轴承处流量的控制。
本发明进一步设置为：所述供油管路上设置有用于检测轴承流量调节装置开度的管路压力检测装置和轴承压力检测装置，所述管路压力检测装置和轴承压力检测装置均连接于中央控制模块。
通过采用上述技术方案，管路压力检测装置和轴承压力检测装置分别对管路位于轴承流量调节装置两端的压力进行检测并传输给中央控制模块，中央控制模块通过对轴承流量调节装置两端的供油管路中的压力进行处理，实现了对轴承流量调节装置开度的检测，从而能够与轴承流量控制单元设置的调节系数进行比对，从而判断轴承流量调节装置的是否正常。
本发明进一步设置为：所述供油管路上设置有用于检测油温并向中央控制模块输出油温信号的油温检测模块，所述供油管路上还设置有冷却装置，所述冷却装置进水管处设置有水量调节装置，所述水量调节装置连接于中央控制模块以接受来自中央控制模块的水量信号进而控制冷却速率。
通过采用上述技术方案，油温检测模块便于对供油管路中的润滑油油温进行检测，中央控制模块根据油温控制冷却装置上的水量调节装置，从而能够实现对油温冷却速度的调节实现将润滑油的油温控制在轴承的工作范围内，便于润滑油被泵送至轴承处将轴承处的热量带走散发。
本发明进一步设置为：所述机组的轴承处设置有轴承振动检测装置，所述轴承振动检测装置连接于中央控制模块。
通过采用上述技术方案，轴承振动检测装置便于对轴承的振动进行检测并将数据传输给中央控制模块，中央控制模块将检测所得的信号与机组正常的振动信号进行比对，当振动范围超过正常范围时发出报警信号，提醒操作人员机组轴承处可能发生故障，及时进行检修。
本发明进一步设置为：所述中央控制模块设置有通信模块，所述通信模块用于通过Profibus-DP通信协议与变频装置进行通信。
通过采用上述技术方案，Profibus-DP通讯系统是一种经过优化的模块，有较高的数据传输率，适用于系统和外部设备之间的通讯，同时适用于对时间要求苛刻的自动化控制系统中，由于供油模块需要不间断工作并且要求响应迅速，因而采用Profibus-DP通讯系统更 能适用于供油模块复杂的工作环境。
本发明进一步设置为：所述中央控制模块连接有用于显示供油模块工作状态的上位机以及用于将润滑系统工作状态上传至云端服务器的无线传输模块。
通过采用上述技术方案，上位机能够对润滑系统的各个元器件工作状态和工作参数进行实时显示，而无线传输模块将润滑系统的各个元器件工作状态和工作参数通过无线传输的方式传输至云端服务器，实现了通过移动终端进行远程智能监控和远程智能控制，实现了智能化运维。
综上所述，本发明的有益效果为：
1、采用了供油模块、变频装置、中央控制模块、逆变模块、油泵检测单元和压力检测模块相配合的技术，从而产生油泵发生故障时在油泵间能够无缝切换，不影响交流变频油泵工作，确保管路压力稳定的效果；
2、采用了轴承温度检测装置、轴承流量调节装置、轴承流量控制单元、管路压力检测装置、轴承压力检测装置、油温检测模块、冷却装置和水量调节装置相配合的技术，从而产生保证轴承处温度恒定的效果；
3、本发明能够适应小机小流量供油和快速灵活的运行特点，实现润滑油系统的快速灵活响应与控制，采用了中央控制模块、上位机和无线传输模块相配合的技术，使供油系统更易控制、更加稳定、更加节能、更加智能。
附图说明
图1为实施例中一种交流油泵变频控制润滑油系统的整体结构示意图；
图2为实施例中用于展现中央控制模块控制信号的结构框图。
图中：1、机组；11、透平机；12、拖动机；13、轴承；131、轴承振动检测装置；132、进油口；133、出油口；134、油雾口；14、油箱；15、供油管路；151、压力检测模块；152、轴承温度检测装置；153、管路压力检测装置；154、轴承压力检测装置；155、油温检测模块；16、除油雾装置；17、加热器；2、供油模块；20、交流变频油泵；21、变频装置；22、逆变模块；221、滤波装置；222、逆变装置；223、转换开关；3、中央控制模块；31、油泵检测单元；32、通信模块；33、轴承流量控制单元；34、无线传输模块；4、轴承流量调节装置；5、冷却装置；51、水量调节装置；6、上位机。
具体实施方式
以下结合附图对本发明作进一步详细说明。
实施例：
一种交流油泵变频控制润滑油系统，参照图1，其包括机组1、油箱14和连接于机组1轴承13处的供油管路15。机组1包括透平机11和拖动机12，透平机11和拖动机12通过联轴器连接，同步转动。拖动机12可以是多个，每个透平机11和拖动机12均安装有轴承13。轴承13开设有进油口132、出油口133和油雾口134，进油口132连接有供油管路15，出油口133连接有回油管路，从而实现润滑油的循环，油雾口134通过管道连接有除油雾装置16，除油雾装置16连通于油箱14。
参照图1和图2，油箱14上安装有多组供油模块2，在一些实施方案中优选为三组，每组供油模块2的输出功率都足以维持润滑系统运转。供油模块2包括交流变频油泵20，交流变频油泵20由交流变频电机驱动。供油模块2均连接有变频装置21，变频装置21连接有用于向变频装置21输出变频信号以调整输出频率进而调整供油模块2输出流量的中央控制模块3，在一些实施方案中，变频装置21为ABB-ACS880型变频器，中央控制模块3可以为工业计算机或PLC控制器，优选为西门子S7-300 PLC控制器。中央控制模块3发送变频信号给变频装置21，变频装置21控制输出给交流变频油泵20的输出频率以控制交流变频油泵20的输出流量。
参照图1和图2，变频装置21还连接有用于给供油模块2提供电源的逆变模块22。逆变模块22包括滤波装置221、逆变装置222和转换开关223。滤波装置221输入端连接于交流电源，例如工业用380V交流电。滤波装置221的输出端连接于转换开关223，转换开关223连接于逆变装置222，逆变装置222连接于直流电源，例如380V蓄电池。直流电源与交流电源并联连接以共同为变频装置21供电，转换开关223用于在交流电源停电时将电源自动切换至直流电源，从而保证了供油模块2的不间断供油。
参照图1和图2，供油管路15上安装有用于检测供油压力并输出压力信号给中央控制模块3以触发油泵检测单元31的压力检测模块151。在一些实施方案中，压力检测模块151为压力变送器P2。压力检测模块151连接于中央控制模块3，以受控于中央控制模块3对供油模块2中的交流变频油泵20进行检测。中央控制模块3内部集成有用于检测供油模块2工作状态的油泵检测单元31，油泵检测单元31用于检测交流变频油泵20的工作状态与设定的工作状态是否一致，如不一致则输出油泵损坏的信号给中央控制模块3。
参照图1和图2，在检测到供油模块2发生损坏时，油泵检测单元31输出切换信号给中央控制模块3以触发中央控制模块3输出变频信号，中央控制模块3在交流变频电机损坏时将其他交流变频电机频率提高。在一些实施方案中，正常状态下，三台交流变频油泵20各以20％-40％的输出功率工作；当1台交流变频油泵20故障时，剩余2台交流变频油泵 20以40％-60％左右的输出功率工作；当2台交流变频油泵20均故障时，剩余1台交流变频油泵20以95％-100％的输出功率工作，以保证润滑系统的不间断供油。
参照图1和图2，中央控制模块3集成有通信模块32，中央控制模块3通过Profibus-DP通信协议与变频装置21进行通信，从而保证了信号传输的稳定性，适应于润滑系统较为复杂的工作环境。
参照图1和图2，机组1的轴承13处安装有轴承温度检测装置152，轴承温度检测装置152连接于中央控制模块3以将温度数据传输给中央控制模块3。在一些实施方案中，轴承温度检测装置152为温度传感器。供油管路15靠近轴承13的一端安装有受控于中央控制模块3的轴承流量调节装置4。在一些实施方案中，轴承流量调节装置4为智能控制阀，其受控于中央控制模块3以调节智能控制阀的开度，进而控制流入轴承13处的润滑油流量。
参照图1和图2，中央控制模块3内部集成有轴承流量控制单元33，以对交流变频油泵20的频率-流量曲线进行测试采集，并绘制曲线。轴承流量控制单元33设置有调节系数k。建立方程Q(n)∝kT(n)，Q为流量，T为温度，k为调节系数，k代表轴承流量调节装置4的开度。以此对应关系调整轴承流量调节装置4的开度，从而通过轴承流量控制单元33控制流量调节装置的开度进而提高轴承13处的散热效率。
参照图1和图2，供油管路15上安装有用于检测流量调节装置开度的管路压力检测装置153和轴承压力检测装置154。管路压力检测装置153安装在轴承流量调节装置4远离轴承13的一端，轴承压力检测装置154安装在轴承流量调节装置4靠近轴承13的一端。在一些实施方案中，管路压力检测装置153和轴承压力检测装置154均为压力传感器。中央控制模块3通过二者的压力差来计算轴承流量调节装置4的实际开度。
参照图1和图2，油箱14上安装有温度传感器T1和加热器17。温度传感器T1检测初试油温并传输给中央控制模块3，中央控制模块3在温度低于预设值时启动加热器17对油箱14内部的润滑油进行加热。供油管路15上安装有用于检测油温并向中央控制模块3输出油温信号的油温检测模块155。在一些实施方案中，油温检测模块155为温度传感器。油温检测模块155为供油管路15上还安装有用于冷却供油管路15中润滑油的冷却装置5，例如冷油器。冷却装置5进水管处安装有水量调节装置51，水量调节装置51连接于中央控制模块3以接受来自中央控制模块3的水量信号进而控制冷却速率。在一些实施方案中，水量调节装置51为水量调节阀。
参照图1和图2，机组1的轴承13处安装有轴承振动检测装置131，轴承振动检测装置131为振动传感器，轴承振动检测装置131连接于中央控制模块3，振动传感器检测轴 承13处的振动并将振动信号发送给中央控制模块3，中央控制模块3在振动超过阈值时发出报警。
参照图1和图2，中央控制模块3连接有用于显示供油模块2工作状态的上位机6。在一些实施方案中，上位机6为触摸显示屏，其既可以显示工作数据，又可以对中央控制模块3输入指令。此外，还包括用于将润滑系统工作状态上传至云端服务器的无线传输模块34，无线传输模块34将润滑系统的各个工作状态和工作参数进行采集并上传到云端，并接收来自用户的远程操作指令，对润滑系统做出相应的控制操作。
工作原理如下：
润滑系统启动之前，油箱14上的温度传感器T1对油温进行检测。在温度低于预设值时，中央控制模块3控制加热器17对润滑油进行加热，从而便于润滑系统启动。润滑系统启动完成之后，供油管路15上的油温检测模块155对供油管路15中的油温进行检测，在温度高于预设值时控制水量调节装置51调节冷却装置5的进水速率，从而提高冷却装置5的冷却速率。
供油模块2处于正常工作状态时，三个供油模块2各以20％-40％的输出功率泵送润滑油。在交流电源停电时，转换开关223自动将逆变模块22的供电电源切换为逆变装置222供电，由直流电源经逆变装置222逆变之后为交流变频油泵20供电。同时，供油管路15上的压力检测模块151对供油压力进行检测并将压力信号传输给中央控制模块3。
中央控制模块3在压力低于预设值时通过油泵检测单元31对供油模块2的交流变频油泵20的工作状态进行检测。当交流变频油泵20没有故障时，中央控制模块3发送信号给三个供油模块2对应的变频装置21，使得三个变频装置21的输出功率提升至100％。若压力持续下降则发出报警，提醒操作人员检修。若一台交流变频油泵20损坏，则中央控制模块3控制剩余的两台交流变频油泵20各以50％左右的输出功率工作。若有两台交流变频油泵20损坏，则中央控制模块3控制剩余的一台交流变频油泵20以95％-100％的输出功率工作。这样，在油泵产生故障时保证了油泵的无缝切换，减小了因油泵切换导致的油压波动，从而提高了机组1的安全性。
在润滑系统工作的过程中，轴承温度检测装置152对轴承13处的温度进行检测并将数据传输给中央控制模块3。中央控制模块3中的轴承流量控制单元33根据轴承13的发热量将对应的控制系数k发送给轴承流量调节装置4以调节轴承流量调节装置4的开度，从而调节流至轴承13处的润滑油量，提高轴承13处散热效率，保证轴承13处温度恒定。
中央控制模块3将整个系统工作状态和工作参数进行检测和监控，并将数据显示在 上位机6上，以便操作人员及时掌握润滑系统的工作情况。同时，中央控制模块3还能够通过无线传输模块34将所有的工作参数和工作状态以无线数据的形式传输到云服务器处，便于操作人员远程查看和远程控制。
本具体实施方式的实施例均为本发明的较佳实施例，并非依此限制本发明的保护范围，故：凡依本发明的结构、形状、原理所做的等效变化，均应涵盖于本发明的保护范围之内。

Claims (10)

  1. 一种交流油泵变频控制润滑油系统，包括机组(1)、油箱(14)和连接于机组(1)轴承处(13)的供油管路(15)，其特征在于：所述油箱(14)上设置有多组供油模块(2)，所述供油模块(2)均连接有变频装置(21)，所述变频装置(21)连接有用于向变频装置(21)输出变频信号以调整输出频率进而调整供油模块(2)输出流量的中央控制模块(3)；所述中央控制模块(3)内部设置有用于检测供油模块(2)工作状态的油泵检测单元(31)，所述供油管路(15)上设置有用于检测供油压力并输出压力信号给中央控制模块(3)以触发油泵检测单元(31)的压力检测模块(151)，所述油泵检测单元(31)用于在检测到供油模块(2)发生损坏时输出切换信号给中央控制模块(3)以触发中央控制模块(3)输出变频信号。
  2. 根据权利要求1所述的交流油泵变频控制润滑油系统，其特征在于：所述变频装置(21)连接有用于给供油模块(2)提供电源的逆变模块(22)，所述逆变模块(22)包括滤波装置(221)、逆变装置(222)和转换开关(223)，所述滤波装置(221)输入端连接于交流电源，所述滤波装置(221)的输出端连接于转换开关(223)，所述转换开关(223)连接于逆变装置(222)，所述逆变装置(222)连接于直流电源。
  3. 根据权利要求2所述的交流油泵变频控制润滑油系统，其特征在于：所述直流电源与交流电源并联连接以共同为变频装置(21)供电。
  4. 根据权利要求1所述的交流油泵变频控制润滑油系统，其特征在于：所述机组(1)的轴承(13)处设置有轴承温度检测装置(152)，所述轴承温度检测装置(152)连接于中央控制模块(3)，所述供油管路(15)靠近轴承(13)的一端设置有受控于中央控制模块(3)以随温度变化调整流量的轴承流量调节装置(4)。
  5. 根据权利要求4所述的交流油泵变频控制润滑油系统，其特征在于：所述中央控制模块(3)内部设置有轴承流量控制单元(33)，所述轴承流量控制单元(33)设置有调节系数，所述轴承流量控制单元(33)用于根据调节系数控制轴承流量调节装置(4)的开度。
  6. 根据权利要求5所述的交流油泵变频控制润滑油系统，其特征在于：所述供油管路(15)上设置有用于检测轴承流量调节装置(4)开度的管路压力检测装置(153)和轴承压力检测装置(154)，所述管路压力检测装置(153)和轴承压力检测装置(154)均连接于中央控制模块(3)。
  7. 根据权利要求5所述的交流油泵变频控制润滑油系统，其特征在于：所述供油管路(15)上设置有用于检测油温并向中央控制模块(3)输出油温信号的油温检测模块(155)，所述供油管路(15)上还设置有冷却装置(5)，所述冷却装置(5)进水管处设置有水量调节装置(51)，所述水量调节装置(51)连接于中央控制模块(3)以接受来自中央控制模块(3)的水量信号进而控制冷却速率。
  8. 根据权利要求1所述的交流油泵变频控制润滑油系统，其特征在于：所述机组(1)的轴承(13)处设置有轴承振动检测装置(131)，所述轴承振动检测装置(131)连接于中央控制模块(3)。
  9. 根据权利要求1所述的交流油泵变频控制润滑油系统，其特征在于：所述中央控制模块(3)设置有通信模块(32)，所述通信模块(32)用于通过Profibus-DP通信协议与变频装置(21)进行通信。
  10. 根据权利要求1所述的交流油泵变频控制润滑油系统，其特征在于：所述中央控制模块(3)连接有用于显示供油模块(2)工作状态的上位机(6)以及用于将润滑系统工作状态上传至云端服务器的无线传输模块(34)。
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