CN112523870A - Gas turbine lubricating oil system - Google Patents
Gas turbine lubricating oil system Download PDFInfo
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- CN112523870A CN112523870A CN202011487645.4A CN202011487645A CN112523870A CN 112523870 A CN112523870 A CN 112523870A CN 202011487645 A CN202011487645 A CN 202011487645A CN 112523870 A CN112523870 A CN 112523870A
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- lubricating oil
- pump
- gas turbine
- oil
- main pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/06—Arrangements of bearings; Lubricating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/36—Power transmission arrangements between the different shafts of the gas turbine plant, or between the gas-turbine plant and the power user
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C9/00—Controlling gas-turbine plants; Controlling fuel supply in air- breathing jet-propulsion plants
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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
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
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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
- F04B23/04—Combinations of two or more pumps
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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
- 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
- F04B49/22—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 by means of valves
Abstract
The invention discloses a gas turbine lubricating oil system, which is characterized in that a main pump and an auxiliary pump provide lubricating oil for a main oil supply pipeline, oil discharged from an oil distribution valve block respectively enters a gas turbine part to be lubricated according to the flow demand to cool and lubricate the gas turbine part, a branch is led to a main pump pre-lubrication pipeline, and enters a main pump cavity through a main pump pre-lubrication check valve and a main pump pre-lubrication flow restrictor on the main pump pre-lubrication pipeline to pre-lubricate a main pump. This gas turbine lubricating oil system, before gas turbine starts, the main pump is out of work, can lubricate in advance the main pump, effectively prolongs main pump life to main pump on the main pump lubricated pipeline in advance the main pump flow restriction of lubrication in advance can effectively control the main pump flow of lubrication in advance, the main pump is lubricated check valve in advance and can prevent that the main pump from pumping flow leakage when moving.
Description
Technical Field
The invention relates to a gas turbine, in particular to a lubricating oil system of the gas turbine.
Background
A Gas Turbine (Gas Turbine) is a rotary power machine which converts heat energy into mechanical work by using continuously flowing Gas as a working medium. In the main flow of air and gas, only a gas Turbine cycle consisting of three major components, namely a Compressor (Compressor), a Combustor (Combustor) and a gas Turbine (Turbine), is called a simple cycle. Most gas turbines use a simple cycle scheme. Because of its simplest structure, it can best embody a series of advantages of small volume, light weight, quick start, little or no cooling water, etc. peculiar to gas turbine.
The working process of the gas turbine is that an air compressor (namely a compressor) continuously sucks air from the atmosphere, and the air is compressed step by an axial flow type air compressor to be pressurized, and meanwhile, the air temperature is correspondingly increased; compressed air is pumped into a combustion chamber and mixed with injected fuel to generate high-temperature and high-pressure gas, the high-temperature and high-pressure gas immediately flows into a gas turbine to expand and do work, a turbine impeller is pushed to drive a compressor impeller to rotate together, waste gas discharged from the turbine is discharged to atmosphere to naturally release heat, partial chemical function of the gas or liquid fuel is converted into mechanical work, and electric work is output; the work-doing ability of the heated high-temperature gas is obviously improved, so that the gas turbine still has residual work as the output mechanical work of the gas turbine while driving the compressor.
The gas turbine can generate higher temperature in the operation process, if the operation parts of the gas turbine operate at the high temperature for a long time, the service life of the gas turbine can be greatly shortened, and certain lubrication needs to be carried out on the gas turbine to improve the transmission efficiency of the gear. Therefore, a lubricating oil system is required to be added in the gas turbine unit to provide lubricating oil with certain pressure and temperature for the bearing chamber and the gear box, so that the lubricating and cooling of the running parts of the gas turbine are ensured, and the anti-corrosion and vibration reduction functions of some parts are realized.
The existing gas turbine lubricating oil system is independent of independent design of a gas turbine sound insulation box and is positioned outside the sound insulation box, so that the integrity of the gas turbine is poor, the transportation of a unit is not facilitated, and the unit is particularly inconvenient to be used as a mobile emergency power supply. In the running process of the unit, lubricating oil in the oil tank is heated and evaporated to generate oil mist, and carbonized micro particles are also mixed in the oil mist; the generation of oil mist forms micro-positive pressure in the oil tank to block oil return of the system; the existing gas turbine lubricating oil system adopts a treatment mode of directly discharging oil mist or simply discharging after filtering, so that the environment is seriously polluted, the oil consumption is increased, the PM2.5 particle concentration in a workshop is greatly improved, and the health of operators is hindered.
Disclosure of Invention
The invention aims to provide a gas turbine lubricating oil system, which can pre-lubricate a main pump before a gas turbine is started, effectively prolong the service life of the main pump, effectively control the pre-lubrication flow of the main pump, and prevent the leakage of the pumped flow when the main pump operates.
In order to solve the technical problem, the gas turbine lubricating oil system provided by the invention comprises a main pump 21, an auxiliary pump 16, an oil combining valve block, an oil distributing valve block and a main pump pre-lubricating pipeline;
the main pump 21 is used for pumping lubricating oil from the lubricating oil tank 7 to be delivered to a main oil supply pipeline through a main pump pipeline and an oil combining valve block during operation;
the auxiliary pump 16 pumps lubricating oil from the lubricating oil tank 7 and sends the lubricating oil to the main oil supply pipeline through an auxiliary pump pipeline and an oil combining valve block when in work;
a main pump one-way valve 46 is arranged on the main pump pipeline, and a liquid inlet of the main pump one-way valve 46 is arranged at the side of the main pump 21;
an auxiliary pump one-way valve 47 is arranged on the auxiliary pump pipeline, and a liquid inlet of the auxiliary pump one-way valve 47 is arranged on the side of the auxiliary pump 16;
the oil distributing valve block is used for respectively sending the lubricating oil output by the main oil supply pipeline to a part to be lubricated of the gas turbine for lubrication according to the flow demand, and one path of the lubricating oil is sent to the input end of the main pump pre-lubrication pipeline;
the output of the main pump pre-lubrication line is communicated to the main pump line between the main pump check valve 46 and the main pump 21;
the main pump pre-lubrication pipeline is provided with a main pump pre-lubrication check valve 33 and a main pump pre-lubrication flow restrictor 32, and a liquid outlet of the main pump pre-lubrication check valve 33 is arranged at the side of the main pump 21;
the main pump 21 is driven by the auxiliary gear 48 of the gear box, and when the gas turbine rotates, the auxiliary gear 48 of the gear box is driven to drive the main pump 21 to work;
before the gas turbine is started, the auxiliary pump 16 works to pump oil from the lubricating oil tank 7, and the main pump 21 cannot be driven by the auxiliary gear 48 of the gear box to work because the gas turbine is not started; during the starting and running of the gas turbine, the main pump 21 is driven by the auxiliary gear 48 of the gear box to pump oil from the lubricating oil tank 7 due to the rotation energy of the gas turbine.
Preferably, the flow rate per unit time of the main pump pre-lubrication flow restrictor 32 is 0.5% to 1.5% of the rated output flow rate per unit time of the auxiliary pump 16.
Preferably, the parts to be lubricated of the gas turbine comprise at least one of the bearing chamber 26, the gear box 4 and the output shaft bearing 3.
Preferably, the gas turbine lubricating oil system further comprises a backup pump 11;
the standby pump 11 pumps lubricating oil out of the lubricating oil tank 7 and sends the lubricating oil to the main oil supply pipeline through a standby pump pipeline and an oil combining valve block when in work;
and a standby pump check valve 6 is arranged on the standby pump pipeline, and a liquid inlet of the standby pump check valve 6 is arranged on the side of the standby pump 11.
Preferably, the gas turbine lubricating oil system further comprises a control circuit;
the main pump 21 is driven by the auxiliary gear 48 of the gear box, and when the gas turbine rotates, the auxiliary gear 48 of the gear box is driven to drive the main pump 21 to work;
the auxiliary pump 16 is driven by an alternating current motor 14, the alternating current motor is powered by a diesel generator before the gas turbine is started, and the gas turbine is switched to supply power after the gas turbine is started;
the standby pump 11 is driven by a direct current motor 10 which is powered by a battery pack;
the control circuit:
when the gas turbine stops for more than a set time, before the gas turbine is started, the standby pump 11 is controlled not to work, the diesel generator is controlled to be started to supply power for the alternating current motor 14 to drive the auxiliary pump 16 to work, oil is pumped from the lubricating oil tank 7, and the main pump 21 cannot be driven to work by the auxiliary gear 48 of the gear box because the gas turbine is not started;
in the starting process of the gas turbine, when the rotating speed of the gas turbine is smaller than the set proportion of the rated rotating speed of the gas turbine, the standby pump 11 is controlled not to work, the auxiliary pump 16 is controlled to work continuously to pump oil from the lubricating oil tank 7, and the main pump 21 is driven by the auxiliary gear 48 of the gear box to work to pump oil from the lubricating oil tank 7 due to the starting of the gas turbine; when the rotating speed of the gas turbine reaches the set proportion of the rated rotating speed, the standby pump 11 is controlled not to work, the alternating current motor 14 is controlled to stop working, so that the auxiliary pump 16 does not work, and the main pump 21 can be driven by the auxiliary gear 48 of the gear box to work to pump oil from the lubricating oil tank 7 due to the rotation of the gas turbine;
in the normal operation process of the gas turbine, the standby pump 11 is controlled not to work, the auxiliary pump 16 is controlled not to work, and the main pump 21 can be driven by the auxiliary gear 48 of the gear box to work due to the rotation of the gas turbine to pump oil from the lubricating oil tank 7;
controlling to start a diesel generator to supply power to an alternating current motor 14 to enable an auxiliary pump 16 to work within a set time after the gas turbine stops working, wherein the auxiliary pump 16 pumps oil from a lubricating oil tank 7, and a main pump 21 stops pumping oil from the lubricating oil tank 7 because the gas turbine stops rotating and cannot be driven by an auxiliary gear 48 of a gear box to work;
when the gas turbine is emergently stopped in the operation process, the direct current motor 10 is controlled to immediately drive the backup pump 11 to work and pump oil from the lubricating oil tank 7, the main pump 21 stops pumping oil from the lubricating oil tank 7 because the gas turbine stops rotating and cannot be driven by the auxiliary gear 48 of the gear box, and the backup pump is stopped when the diesel generator is started to supply power to the alternating current motor 14 to drive the auxiliary pump 16 to work and pump oil from the lubricating oil tank 7.
Preferably, the set time is 30 minutes;
the set ratio is 95%.
Preferably, a three-way temperature control valve 39 is arranged on the main oil supply pipeline;
the three-way temperature control valve 39 comprises a temperature control main inlet, a temperature control auxiliary inlet and a temperature control outlet;
the temperature control auxiliary inlet is communicated to a main oil supply pipeline at the inlet side of the three-way temperature control valve 39 through an air cooling heat dissipation pipeline;
the temperature control main inlet is directly communicated with a main oil supply pipeline at the inlet side of the three-way temperature control valve 39;
the main oil supply pipeline at the inlet side of the three-way temperature control valve 39 is connected with the oil combining valve block;
when the oil temperature in the main oil supply pipeline at the inlet side of the three-way temperature control valve 39 is higher than a set high temperature value, the temperature control main inlet is closed, and the temperature control auxiliary inlet is communicated; otherwise, the temperature control main inlet is conducted, and the temperature control auxiliary inlet is closed;
the air-cooled radiating pipeline is provided with an air-cooled radiator 36;
the air-cooled radiator 36 is used for cooling the lubricating oil flowing through the air-cooled heat dissipation loop.
Preferably, a duplex filter 31 is arranged on a main oil supply pipeline between the three-way temperature control valve 39 and the oil distributing valve block;
the duplex filter 31 is used for filtering the lubricating oil flowing from the three-way temperature control valve 39 to the oil distributing valve block.
Preferably, one path of the lubricating oil output by the oil distributing valve block is communicated to the lubricating oil tank 7 through an oil distributing and returning pipeline;
a system plug-in overflow valve 24 is arranged on the oil separating and returning pipeline;
the system is inserted with an overflow valve 24, and when the oil pressure of the lubricating oil output by the oil distributing valve block exceeds a set value, the system is opened, so that a part of the lubricating oil output by the oil distributing valve block flows back to the lubricating oil tank 7 through an oil return pipeline, and the oil pressure of the lubricating oil output by the oil distributing valve block is reduced.
Preferably, the gas turbine lubricating oil system further comprises an oil mist separator 2;
the exhaust hole of the lubricating oil tank 7 and the air hole of the gas turbine gear box 4 are respectively communicated with the oil mist separator 2 through pipelines;
the oil mist separator 2 is used for separating oil and air through coalescence and separation of oil mist, enabling the separated lubricating oil to flow back to the lubricating oil tank 7 through a separation oil return pipeline, enabling the separated air to enter the flame arrester 1 and finally be discharged into the atmosphere.
Preferably, a main pump overflow line is provided between the main pump line from the main pump 21 to the main pump check valve 46 and the lubricating oil tank 7;
a main pump plug-in overflow valve 23 is arranged on the main pump overflow pipeline;
when the oil pressure in the main pump pipeline is larger than a set value, the main pump plug-in overflow valve 23 is opened, and a part of lubricating oil pumped out by the main pump 21 flows back to the lubricating oil tank 7 through the main pump overflow pipeline, so that the oil pressure in the main pump pipeline is reduced.
Preferably, a main pump exhaust line is provided between the main pump line from the main pump 21 to the main pump check valve 46 and the lubricating oil tank 7;
and a main pump exhaust flow restrictor 45 is arranged on the main pump exhaust pipeline.
Preferably, the air-cooled radiator 36 is connected to the lubricating oil tank 7 through a radiator exhaust pipeline;
a heat dissipating exhaust flow restrictor 37 is provided in the radiator exhaust line.
Preferably, the main pump 21 is provided with a overflow bypass valve 22;
an oil inlet of a main pump 21 is connected with a main pump oil suction filter 20 through a pipeline;
the main pump suction filter 20 is disposed below the lubricating oil level in the lubricating oil tank 7.
Preferably, the auxiliary pump 16 and the spare pump 11 are provided with overflow bypass valves 22;
the auxiliary pump 16 and the oil inlet of the standby pump 11 are respectively connected with the auxiliary pump oil suction filter 13 through pipelines;
the sub-pump suction filter 13 is disposed below the lubricating oil level in the lubricating oil tank 7.
Preferably, the oil supply pipeline of the gear box, the oil supply pipeline of the bearing chamber, the main pump pipeline, the oil inlet of the duplex filter 31 and the oil outlet of the duplex filter 31 are respectively provided with a pressure sensor 25;
pressure signals at various positions detected by the pressure sensors 25 are transmitted to the server;
and the server is used for monitoring the pressure in the pipeline in real time.
Preferably, a pipeline temperature sensor 5 is respectively arranged on an oil inlet of the air cooling radiator 36, an oil outlet of the duplex filter 31, and an oil return pipeline from the gear box 4 to the lubricating oil tank 7;
temperature signals at various positions detected by the pipeline temperature sensors 5 are transmitted to the server;
and the server is used for monitoring the temperature in the pipeline in real time.
Preferably, the lubricating oil tank 7 is provided with a tank temperature sensor 35 and a liquid level sensor 18;
the temperature signal detected by the oil tank temperature sensor 35 and the liquid level signal detected by the liquid level sensor 18 are sent to the server;
and the server is used for monitoring the oil temperature and the liquid level in the lubricating oil tank 7 in real time.
Preferably, a pressure difference meter 43 is arranged between an oil inlet and an oil outlet of the duplex filter;
a pressure gauge 28 is arranged at an oil outlet of the duplex filter;
a thermometer 40 is arranged at each oil inlet of the duplex filter;
a level gauge 19 is attached to the lubricating oil tank 7.
Preferably, a heater 8 is arranged inside the lubricating oil tank 7;
the heater 8 starts heating when the temperature of the lubricating oil in the lubricating oil tank 7 is lower than a set low temperature value;
the set low temperature value is lower than the set high temperature value.
Preferably, the set high temperature value is 50 ℃;
the set low temperature value was 10 ℃.
Preferably, pressure switches 9 are respectively arranged on the auxiliary pump pipeline, the standby pump pipeline and the main oil supply pipeline between the duplex filter and the oil combining valve block;
and the control circuit controls the start and stop of the gas turbine according to the state of each pressure switch.
Preferably, the lubricating oil tank 7 is integrated on a skid-mounted base.
According to the gas turbine lubricating oil system, the main pump 21 and the auxiliary pump 16 provide lubricating oil for the main oil supply pipeline, the oil discharged from the oil distribution valve block not only respectively enters the bearing chamber 26, the gear box 4 and the output shaft bearing 3 according to the flow demand to wait for the lubricating parts to cool and lubricate the lubricating parts, but also introduces a branch to the main pump pre-lubricating pipeline, and enters the pump cavity of the main pump 21 through the main pump pre-lubricating one-way valve 33 and the main pump pre-lubricating flow restrictor 32 on the main pump pre-lubricating pipeline to pre-lubricate the main pump 21. This gas turbine lubricating oil system, before gas turbine starts, main pump 21 is out of work, can carry out the prelubrication to main pump 21, effectively prolongs main pump 21 life to the main pump on the main pump prelubrication pipeline prelubricates the flow that current limiter 32 can effectively control main pump 21 and lubricate the flow in advance, and the main pump is lubricated check valve 33 in advance and can prevent that main pump 21 from pumping flow when moving and leaking.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the present invention are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of an embodiment of a gas turbine lubricating oil system according to the present invention.
The reference numbers in the figures illustrate:
1, a flame arrester; 2 an oil-mist separator; 3 an output shaft bearing; 4 a gear case; 5 a pipeline temperature sensor; 6, a one-way valve of a standby pump; 7 lubricating oil tank; 8, a heater; 9 a pressure switch; 10 a direct current motor; 11 a backup pump; 13 auxiliary pump oil suction filter; 14 an alternating current motor; 16 auxiliary pumps; 18 a liquid level sensor; 19 a liquid level meter; 20, a main pump oil suction filter; 21 a main pump; 22 an overflow bypass valve; an overflow valve is inserted into the main pump 23; 24, inserting an overflow valve into the system; 25 a pressure sensor; 26 a bearing chamber; 28 pressure gauge; 31 a duplex filter; 32 main pump pre-lubrication flow restrictor; 33 main pump pre-lubrication check valve; 35 a tank temperature sensor; 36 air-cooled radiators; 37 heat dissipating exhaust flow restrictor; 39 three-way temperature control valve; a 40-degree temperature meter; 43 pressure difference meter; 45 main pump exhaust flow restrictor; 46 a main pump check valve; 47 auxiliary pump check valve; 48 gearbox auxiliary gear.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1, the gas turbine lubricating oil system includes a main pump 21, an auxiliary pump 16, an oil combining valve block, an oil distributing valve block, and a main pump pre-lubrication pipeline;
the main pump 21 is used for pumping lubricating oil from the lubricating oil tank 7 to be delivered to a main oil supply pipeline through a main pump pipeline and an oil combining valve block during operation;
the auxiliary pump 16 pumps lubricating oil from the lubricating oil tank 7 and sends the lubricating oil to the main oil supply pipeline through an auxiliary pump pipeline and an oil combining valve block when in work;
a main pump one-way valve 46 is arranged on the main pump pipeline, and a liquid inlet of the main pump one-way valve 46 is arranged at the side of the main pump 21;
an auxiliary pump one-way valve 47 is arranged on the auxiliary pump pipeline, and a liquid inlet of the auxiliary pump one-way valve 47 is arranged on the side of the auxiliary pump 16;
the oil distributing valve block is used for respectively sending the lubricating oil output by the main oil supply pipeline to a part to be lubricated of the gas turbine for lubrication according to the flow demand, and one path of the lubricating oil is sent to the input end of the main pump pre-lubrication pipeline;
the output of the main pump pre-lubrication line is communicated to the main pump line between the main pump check valve 46 and the main pump 21;
the main pump pre-lubrication pipeline is provided with a main pump pre-lubrication check valve 33 and a main pump pre-lubrication flow restrictor 32, and a liquid outlet of the main pump pre-lubrication check valve 33 is arranged at the side of the main pump 21;
the main pump 21 is driven by the auxiliary gear 48 of the gear box, and when the gas turbine rotates, the auxiliary gear 48 of the gear box is driven to drive the main pump 21 to work;
before the gas turbine is started, the auxiliary pump 16 works to pump oil from the lubricating oil tank 7, and the main pump 21 cannot be driven by the auxiliary gear 48 of the gear box to work because the gas turbine is not started; during the starting and running of the gas turbine, the main pump 21 is driven by the auxiliary gear 48 of the gear box to pump oil from the lubricating oil tank 7 due to the rotation energy of the gas turbine.
Preferably, the flow rate per unit time of the main pump pre-lubrication flow restrictor 32 is 0.5% to 1.5% of the rated output flow rate per unit time of the auxiliary pump 16.
Preferably, the parts to be lubricated of the gas turbine comprise at least one of the bearing chamber 26, the gear box 4 and the output shaft bearing 3.
In the gas turbine lubricating oil system according to the first embodiment, the main pump 21 and the auxiliary pump 16 provide lubricating oil for the main oil supply pipeline, oil discharged from the oil distribution valve block not only enters the bearing chamber 26, the gear box 4 and the output shaft bearing 3 respectively according to flow requirements to wait for a lubricating part to cool and lubricate the lubricating part, but also leads a branch to the main pump pre-lubricating pipeline, and enters the pump cavity of the main pump 21 through the main pump pre-lubricating check valve 33 and the main pump pre-lubricating flow restrictor 32 on the main pump pre-lubricating pipeline to pre-lubricate the main pump 21. In the gas turbine lubricating oil system, before the gas turbine is started, the main pump 21 does not work, the main pump 21 can be pre-lubricated, the service life of the main pump 21 is effectively prolonged, the main pump pre-lubrication flow limiter 32 on the main pump pre-lubrication pipeline can effectively control the pre-lubrication flow of the main pump 21, and the main pump pre-lubrication check valve 33 can prevent the flow leakage of the main pump 21 during the starting and running processes of the gas turbine.
Example two
According to the first embodiment, the gas turbine lubricating oil system further comprises a backup pump 11;
the standby pump 11 pumps lubricating oil out of the lubricating oil tank 7 and sends the lubricating oil to the main oil supply pipeline through a standby pump pipeline and an oil combining valve block when in work;
and a standby pump check valve 6 is arranged on the standby pump pipeline, and a liquid inlet of the standby pump check valve 6 is arranged on the side of the standby pump 11.
In the gas turbine lubricating oil system according to the second embodiment, the main pump 21, the auxiliary pump 16, and the backup pump 11 are used to supply lubricating oil to the main oil supply line. The one-way valve enables the oil paths of the main pump 21, the auxiliary pump 16 and the backup pump 11 to be independent and not to interfere with each other, and stable lubricating oil is provided for a gas turbine bearing chamber 26, a gear box 4 and an output shaft bearing 3 to wait for lubricating parts through the mutual matching of the three pumps in the operation process of the gas turbine.
EXAMPLE III
According to the second embodiment, the gas turbine lubricating oil system further comprises a control circuit;
the auxiliary pump 16 is driven by an alternating current motor 14, the alternating current motor is powered by a diesel generator before the gas turbine is started, and the gas turbine is switched to supply power after the gas turbine is started;
the standby pump 11 is driven by a direct current motor 10 which is powered by a battery pack;
the control circuit:
when the gas turbine is stopped for more than a set time (for example, 30 minutes), before the gas turbine is started, the standby pump 11 is controlled not to work, the diesel generator is controlled to be started to supply power for the alternating current motor 14 to drive the auxiliary pump 16 to work, oil is pumped from the lubricating oil tank 7, and the main pump 21 cannot be driven to work by the auxiliary gear 48 of the gear box because the gas turbine is not started;
in the starting process of the gas turbine, when the rotating speed of the gas turbine is smaller than the set proportion (for example, 95%) of the rated rotating speed of the gas turbine, the standby pump 11 is controlled not to work, the auxiliary pump 16 is controlled to work continuously to pump oil from the lubricating oil tank 7, and the main pump 21 is driven by the auxiliary gear 48 of the gear box to work to pump oil from the lubricating oil tank 7 due to the starting of the gas turbine; when the rotating speed of the gas turbine reaches a set proportion (for example, 95%) of the rated rotating speed, the standby pump 11 is controlled not to work, the alternating current motor 14 is controlled to stop working, the auxiliary pump 16 does not work, and the main pump 21 can be driven by the auxiliary gear 48 of the gear box to work due to the rotation of the gas turbine to pump oil from the lubricating oil tank 7;
in the normal operation process of the gas turbine, the standby pump 11 is controlled not to work, the auxiliary pump 16 is controlled not to work, and the main pump 21 can be driven by the auxiliary gear 48 of the gear box to work due to the rotation of the gas turbine to pump oil from the lubricating oil tank 7;
controlling to start a diesel generator to supply power to the alternating current motor 14 within a set time (for example, 30 minutes) after the gas turbine is stopped so as to enable the auxiliary pump 16 to work, wherein the auxiliary pump 16 pumps oil from the lubricating oil tank 7, and the main pump 21 stops pumping oil from the lubricating oil tank 7 because the gas turbine stops rotating and cannot be driven by the auxiliary gear 48 of the gear box to work;
when the gas turbine is emergently stopped in the operation process, the direct current motor 10 is controlled to immediately (within 1 second) drive the standby pump 11 to work and pump oil from the lubricating oil tank 7, the main pump 21 stops pumping oil from the lubricating oil tank 7 because the gas turbine stops rotating and cannot be driven by the auxiliary gear 48 of the gear box, and the standby pump is stopped when the diesel generator is started to supply power to the alternating current motor 14 to drive the auxiliary pump 16 to work and pump oil from the lubricating oil tank 7.
In the lubricating oil system for the gas turbine in the third embodiment, before the gas turbine is started, the bearing chamber 26 of the gas turbine, the gear box 4 and the output shaft bearing 3 need to wait for lubrication of a lubricating part and pre-lubricate the main pump 21, at this time, the main pump 21 does not work because the gas turbine is in a stop state, and the backup pump 11 does not work; the auxiliary pump 16 is controlled to be driven by the alternating current motor 14 to pump oil, the auxiliary pump 16 pumps lubricating oil to push an auxiliary pump one-way valve 47 and then sends the lubricating oil to a main oil supply pipeline, and one way of oil output of the oil distribution valve block enters a main pump cavity through a main pump pre-lubrication one-way valve 33 and a main pump pre-lubrication flow restrictor 32 to pre-lubricate a main pump 21; in the starting process of the gas turbine, the main pump 21 is driven by the auxiliary gear 48 of the gear box to start oil supply, the rotating speed of the main pump 21 changes along with the change of the rotating speed of the gas turbine, and the rotating speed of the gas turbine at the initial starting stage is lower, so that the main pump 21 alone supplies oil and cannot meet the flow required by cooling and lubricating the bearing chamber 26, the gear box 4, the output shaft bearing 3 and the like, the auxiliary pump 16 cooperates with the main pump 21 to supply oil continuously, the outlet pressure of the main pump 21 is higher than the oil pressure in a main pump pre-lubricating pipeline, the main pump lubricating one-way valve 33 is closed, the main pump 21 is not pre-lubricated any more; when the rotating speed of the gas turbine exceeds the set proportion of the rated rotating speed of the gas turbine in the starting process of the gas turbine and the gas turbine normally runs, the flow of lubricating oil pumped out by the main pump 21 can meet the system requirements, at the moment, the alternating current motor 14 is controlled to stop driving the auxiliary pump 16, the main pump 21 independently supplies oil to the system, the outlet pressure of the main pump 21 is higher than the oil pressure in a pre-lubricating pipeline of the main pump, the lubricating one-way valve 33 of the main pump is closed, and the main pump 21 is not pre-lubricated any more; in a set time after the gas turbine is stopped, the main pump 21 does not work because the gas turbine is in a stopped state, and because the whole unit is still in a high-temperature state, lubricating oil with a certain flow rate is required to be provided for a bearing chamber 26, a gear box 4, an output shaft bearing 3 and the like to cool and lubricate the bearing chamber, the gear box 4, the output shaft bearing 3 and the like, and at the moment, the alternating current motor 14 is controlled to drive the auxiliary pump 16 to continuously supply oil to; when the gas turbine is in emergency shutdown in the operation process, the main pump 21 does not work because the gas turbine is in a shutdown state, the auxiliary pump 16 can start to work after the diesel generator is started, a certain time (about 30S) is needed from the start to the start of power generation of the diesel generator, in the starting process of the diesel generator, the standby pump 11 is driven by the direct current motor 10 to firstly carry out emergency oil supply on the system, and the direct current motor 10 is powered by the battery pack and can immediately work to drive the standby pump 11 to supply oil to the system, so that the gas turbine bearing chamber 26, the gear box 4 and the output shaft bearing 3 are prevented from being damaged when the lubrication parts wait for the lubrication interruption due to the emergency.
Example four
Based on the gas turbine lubricating oil system of the third embodiment, a three-way temperature control valve 39 is arranged on the main oil supply pipeline;
the three-way temperature control valve 39 comprises a temperature control main inlet, a temperature control auxiliary inlet and a temperature control outlet;
the temperature control auxiliary inlet is communicated to a main oil supply pipeline at the inlet side of the three-way temperature control valve 39 through an air cooling heat dissipation pipeline;
the temperature control main inlet is directly communicated with a main oil supply pipeline at the inlet side of the three-way temperature control valve 39;
the main oil supply pipeline at the inlet side of the three-way temperature control valve 39 is connected with the oil combining valve block;
when the oil temperature in the main oil supply pipeline at the inlet side of the three-way temperature control valve 39 is higher than a set high temperature value (for example, 50 ℃), the temperature control main inlet is closed, and the temperature control auxiliary inlet is communicated; otherwise, the temperature control main inlet is conducted, and the temperature control auxiliary inlet is closed;
the air-cooled radiating pipeline is provided with an air-cooled radiator 36;
the air-cooled radiator 36 is used for cooling the lubricating oil flowing through the air-cooled heat dissipation loop.
Preferably, a duplex filter 31 is arranged on a main oil supply pipeline between the three-way temperature control valve 39 and the oil distributing valve block;
the duplex filter 31 is used for filtering the lubricating oil flowing from the three-way temperature control valve 39 to the oil distributing valve block.
In the lubricating oil system of the gas turbine according to the fourth embodiment, when the oil temperature is high, the three-way temperature control valve 39 opens the temperature control auxiliary inlet to close the temperature control main inlet, the lubricating oil is cooled by the air-cooled radiator 36 and then enters the three-way temperature control valve 39 through the temperature control auxiliary inlet, and the oil discharged from the three-way temperature control valve enters the oil distribution valve block after being filtered by the duplex filter 31.
EXAMPLE five
Based on the lubricating oil system of the gas turbine in the fourth embodiment, one path of the lubricating oil output by the oil distributing valve block is communicated to the lubricating oil tank 7 through an oil distributing and returning pipeline;
a system plug-in overflow valve 24 is arranged on the oil separating and returning pipeline;
the system is inserted with an overflow valve 24, and when the oil pressure of the lubricating oil output by the oil distributing valve block exceeds a set value, the system is opened, so that a part of the lubricating oil output by the oil distributing valve block flows back to the lubricating oil tank 7 through an oil return pipeline, and the oil pressure of the lubricating oil output by the oil distributing valve block is reduced.
EXAMPLE six
According to the fourth embodiment, the gas turbine lubricating oil system further comprises an oil mist separator 2;
the exhaust hole of the lubricating oil tank 7 and the air hole of the gas turbine gear box 4 are respectively communicated with the oil mist separator 2 through pipelines;
the oil mist separator 2 is used for separating oil and air through coalescence and separation of oil mist, enabling the separated lubricating oil to flow back to the lubricating oil tank 7 through a separation oil return pipeline, enabling the separated air to enter the flame arrester 1 and finally be discharged into the atmosphere.
In the gas turbine lubricating oil system according to the sixth embodiment, the oil mist separator 2 is added to separate oil mist discharged from the lubricating oil tank 7 and the gas turbine gear box 4, the separated lubricating oil flows back to the lubricating oil tank 7 through the oil return line, and air is discharged, so that the consumption of the lubricating oil can be effectively reduced, and the environment can be protected.
EXAMPLE seven
According to the gas turbine lubricating oil system of the fourth embodiment, a main pump overflow line is arranged between a main pump line between a main pump 21 and a main pump check valve 46 and the lubricating oil tank 7;
a main pump plug-in overflow valve 23 is arranged on the main pump overflow pipeline;
when the oil pressure in the main pump pipeline is larger than a set value, the main pump plug-in overflow valve 23 is opened, and a part of lubricating oil pumped out by the main pump 21 flows back to the lubricating oil tank 7 through the main pump overflow pipeline, so that the oil pressure in the main pump pipeline is reduced.
Preferably, a main pump exhaust line is provided between the main pump line from the main pump 21 to the main pump check valve 46 and the lubricating oil tank 7; and a main pump exhaust flow restrictor 45 is arranged on the main pump exhaust pipeline. During operation, gas in the main pump and associated lines can be effectively exhausted through the main pump exhaust line, and the main pump exhaust flow restrictor 45 can control the flow of lubricant that is exhausted along with the air during exhaust.
Preferably, the air-cooled radiator 36 is connected to the lubricating oil tank 7 through a radiator exhaust pipeline; a heat dissipating exhaust flow restrictor 37 is provided in the radiator exhaust line. During operation, air in the radiator and the corresponding line can be effectively exhausted through the radiator exhaust line, and the heat dissipation exhaust restrictor 37 can control the flow rate of the lubricating oil exhausted together with air during exhaust.
The gas turbine lubricating oil system of the seventh embodiment adds a flow restrictor in the main pump exhaust pipe and the radiator exhaust pipe, so that main pump exhaust and radiator exhaust are more convenient and feasible.
Example eight
Based on the lubricating oil system of the gas turbine of the fourth embodiment, the main pump 21 is provided with a overflow bypass valve 22;
an oil inlet of a main pump 21 is connected with a main pump oil suction filter 20 through a pipeline;
the main pump suction filter 20 is disposed below the lubricating oil level in the lubricating oil tank 7.
Preferably, the auxiliary pump 16 and the spare pump 11 are provided with overflow bypass valves 22;
the auxiliary pump 16 and the oil inlet of the standby pump 11 are respectively connected with the auxiliary pump oil suction filter 13 through pipelines;
the sub-pump suction filter 13 is disposed below the lubricating oil level in the lubricating oil tank 7.
Example nine
Based on the lubricating oil system of the gas turbine in the fourth embodiment, the oil supply pipeline of the gear box, the oil supply pipeline of the bearing chamber, the main pump pipeline, the oil inlet of the duplex filter 31 and the oil outlet of the duplex filter 31 are respectively provided with a pressure sensor 25;
pressure signals at various positions detected by the pressure sensors 25 are transmitted to the server;
and the server is used for monitoring the pressure in the pipeline in real time.
Preferably, a pipeline temperature sensor 5 is respectively arranged on an oil inlet of the air cooling radiator 36, an oil outlet of the duplex filter 31, and an oil return pipeline from the gear box 4 to the lubricating oil tank 7;
temperature signals at various positions detected by the pipeline temperature sensors 5 are transmitted to the server;
and the server is used for monitoring the temperature in the pipeline in real time.
Preferably, the lubricating oil tank 7 is provided with a tank temperature sensor 35 and a liquid level sensor 18;
the temperature signal detected by the oil tank temperature sensor 35 and the liquid level signal detected by the liquid level sensor 18 are sent to the server;
and the server is used for monitoring the oil temperature and the liquid level in the lubricating oil tank 7 in real time.
Example ten
Based on the lubricating oil system of the gas turbine of the fourth embodiment, a pressure difference meter 43 is arranged between an oil inlet and an oil outlet of the duplex filter;
a pressure gauge 28 is arranged at an oil outlet of the duplex filter;
a thermometer 40 is arranged at each oil inlet of the duplex filter;
a level gauge 19 is attached to the lubricating oil tank 7.
The lubricating oil system of the gas turbine in the tenth embodiment can directly observe the temperature, the pressure and the oil tank liquid level in the whole system by naked eyes on site.
EXAMPLE eleven
Based on the lubricating oil system of the gas turbine of the fourth embodiment, a heater 8 is arranged inside the lubricating oil tank 7;
the heater 8 starts heating when the temperature of the lubricating oil in the lubricating oil tank 7 is lower than a set low temperature value;
the set low temperature value is lower than the set high temperature value.
Preferably, the set high temperature value is 50 ℃;
the set low temperature value was 10 ℃.
In the lubricating oil system for a gas turbine according to the eleventh embodiment, the heater 8 heats the lubricating oil in the lubricating oil tank 7 when the temperature of the lubricating oil in the lubricating oil tank is low, so that the normal start of the gas turbine in winter is ensured.
Example twelve
Based on the lubricating oil system of the gas turbine in the fourth embodiment, pressure switches 9 are respectively arranged on the auxiliary pump pipeline, the standby pump pipeline and the main oil supply pipeline between the duplex filter and the oil combining valve block;
and the control circuit controls the start and stop of the gas turbine according to the state of each pressure switch.
EXAMPLE thirteen
Based on the gas turbine lubricating oil system of the fourth embodiment, the lubricating oil tank 7 is integrated on a skid-mounted base.
In the gas turbine lubricating oil system of the thirteenth embodiment, the lubricating oil tank 7 is integrated on the skid-mounted base, so that the whole unit is compact in structure and high in integration level, the unit is convenient to transport, and particularly the mobile emergency power supply unit is more convenient to use.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (23)
1. A gas turbine lubricating oil system is characterized by comprising a main pump (21), an auxiliary pump (16), an oil combining valve block, an oil distributing valve block and a main pump pre-lubricating pipeline;
the main pump (21) pumps lubricating oil from the lubricating oil tank (7) and sends the lubricating oil to a main oil supply pipeline through a main pump pipeline and an oil combination valve block when in work;
the auxiliary pump (16) pumps lubricating oil from the lubricating oil tank (7) and sends the lubricating oil to the main oil supply pipeline through an auxiliary pump pipeline and an oil combining valve block when in work;
a main pump one-way valve (46) is arranged on the main pump pipeline, and a liquid inlet of the main pump one-way valve (46) is arranged on the side of the main pump (21);
an auxiliary pump one-way valve (47) is arranged on the auxiliary pump pipeline, and a liquid inlet of the auxiliary pump one-way valve (47) is arranged on the side of the auxiliary pump (16);
the oil distributing valve block is used for respectively sending the lubricating oil output by the main oil supply pipeline to a part to be lubricated of the gas turbine for lubrication according to the flow demand, and one path of the lubricating oil is sent to the input end of the main pump pre-lubrication pipeline;
the output end of the main pump pre-lubrication pipeline is communicated with a main pump pipeline between the main pump check valve (46) and the main pump (21);
the main pump pre-lubrication pipeline is provided with a main pump pre-lubrication check valve (33) and a main pump pre-lubrication flow limiter (32), and a liquid outlet of the main pump pre-lubrication check valve (33) is arranged on the side of the main pump (21);
the main pump (21) is driven by the auxiliary gear (48) of the gear box, and when the gas turbine rotates, the auxiliary gear (48) of the gear box is driven to drive the main pump (21) to work;
before the gas turbine is started, an auxiliary pump (16) works to pump oil from a lubricating oil tank (7), and a main pump (21) cannot be driven by an auxiliary gear (48) of a gear box to work because the gas turbine is not started; during the starting and running of the gas turbine, the main pump (21) is driven by the auxiliary gear (48) of the gear box to pump oil from the lubricating oil tank (7) due to the rotation energy of the gas turbine.
2. The gas turbine lubricating oil system of claim 1,
the flow rate of the main pump pre-lubrication flow restrictor (32) in unit time is 0.5% -1.5% of the rated output outflow rate of the auxiliary pump (16) in unit time.
3. The gas turbine lubricating oil system of claim 1,
the parts to be lubricated of the gas turbine comprise at least one of a bearing chamber (26), a gearbox (4) and an output shaft bearing (3).
4. The gas turbine lubricating oil system of claim 1,
the gas turbine lubricating oil system further comprises a backup pump (11);
the standby pump (11) pumps lubricating oil from the lubricating oil tank (7) and sends the lubricating oil to the main oil supply pipeline through the standby pump pipeline and the oil combining valve block when in work;
and a standby pump check valve (6) is arranged on the standby pump pipeline, and a liquid inlet of the standby pump check valve (6) is arranged on the side of the standby pump (11).
5. The gas turbine lubricating oil system of claim 4,
the gas turbine lubricating oil system further comprises a control circuit;
the main pump (21) is driven by the auxiliary gear (48) of the gear box, and when the gas turbine rotates, the auxiliary gear (48) of the gear box is driven to drive the main pump (21) to work;
the auxiliary pump (16) is driven by an alternating current motor (14), the alternating current motor is powered by a diesel generator before the gas turbine is started, and the gas turbine is switched to supply power after the gas turbine is started;
the standby pump (11) is driven by a direct current motor (10), and the direct current motor is powered by a battery pack;
the control circuit:
when the gas turbine stops for more than a set time, before the gas turbine is started, the standby pump (11) is controlled not to work, the diesel generator is controlled to be started to supply power to the alternating current motor (14) to drive the auxiliary pump (16) to work, oil is pumped from the lubricating oil tank (7), and the main pump (21) cannot be driven to work by the auxiliary gear (48) of the gear box because the gas turbine is not started;
in the starting process of the gas turbine, when the rotating speed of the gas turbine is smaller than the set proportion of the rated rotating speed of the gas turbine, the standby pump (11) is controlled not to work, the auxiliary pump (16) is controlled to work continuously to pump oil from the lubricating oil tank (7), and the main pump (21) is driven by the auxiliary gear (48) of the gear box to work to pump oil from the lubricating oil tank (7) due to the starting energy of the gas turbine; when the rotating speed of the gas turbine reaches the set proportion of the rated rotating speed, the standby pump (11) is controlled not to work, the alternating current motor (14) is controlled to stop working so that the auxiliary pump (16) does not work, and the main pump (21) can be driven by the auxiliary gear (48) of the gear box to work due to the rotation of the gas turbine to pump oil from the lubricating oil tank (7);
in the normal operation process of the gas turbine, the standby pump (11) is controlled not to work, the auxiliary pump (16) is controlled not to work, and the main pump (21) can be driven by the auxiliary gear (48) of the gear box to work to pump oil from the lubricating oil tank (7) due to the rotation energy of the gas turbine;
controlling and starting a diesel generator to supply power to an alternating current motor (14) within a set time after the gas turbine is stopped so as to enable an auxiliary pump (16) to work, wherein the auxiliary pump (16) pumps oil from a lubricating oil tank (7), and a main pump (21) stops pumping oil from the lubricating oil tank (7) because the gas turbine stops rotating and cannot be driven by an auxiliary gear (48) of a gear box to work;
when the gas turbine is emergently stopped in the operation process, the direct current motor (10) is controlled to immediately drive the standby pump (11) to work and pump oil from the lubricating oil tank (7), the main pump (21) stops pumping oil from the lubricating oil tank (7) because the gas turbine stops rotating and cannot be driven by the auxiliary gear (48) of the gear box to work, and the standby pump is stopped when the diesel generator is started to supply power to the alternating current motor (14) to drive the auxiliary pump (16) to work and pump oil from the lubricating oil tank (7).
6. The gas turbine lubricating oil system of claim 5,
the set time is 30 minutes;
the set ratio is 95%.
7. The gas turbine lubricating oil system of claim 4,
a three-way temperature control valve (39) is arranged on the main oil supply pipeline;
the three-way temperature control valve (39) comprises a temperature control main inlet, a temperature control auxiliary inlet and a temperature control outlet;
the temperature control auxiliary inlet is communicated to a main oil supply pipeline at the inlet side of the three-way temperature control valve (39) through an air cooling heat dissipation pipeline;
the temperature control main inlet is directly communicated with a main oil supply pipeline at the inlet side of the three-way temperature control valve (39);
the main oil supply pipeline at the inlet side of the three-way temperature control valve (39) is connected with the oil combining valve block;
when the oil temperature in the main oil supply pipeline at the inlet side of the three-way temperature control valve (39) is higher than a set high temperature value, the temperature control main inlet is closed, and the temperature control auxiliary inlet is communicated; otherwise, the temperature control main inlet is conducted, and the temperature control auxiliary inlet is closed;
an air-cooled radiator (36) is arranged on the air-cooled radiating pipeline;
the air-cooled radiator (36) is used for cooling the lubricating oil flowing through the air-cooled radiating loop.
8. The gas turbine lubricating oil system of claim 7,
a duplex filter (31) is arranged on a main oil supply pipeline between the three-way temperature control valve (39) and the oil distributing valve block;
the duplex filter (31) is used for filtering the lubricating oil flowing from the three-way temperature control valve (39) to the oil distributing valve block.
9. The gas turbine lubricating oil system of claim 8,
the lubricating oil output by the oil distributing valve block is communicated with a lubricating oil tank (7) through an oil distributing and returning pipeline in one way;
a system plug-in overflow valve (24) is arranged on the oil separating and returning pipeline;
the system is inserted with an overflow valve (24), and when the oil pressure of the lubricating oil output by the oil distributing valve block exceeds a set value, the system is opened, so that a part of the lubricating oil output by the oil distributing valve block flows back to a lubricating oil tank (7) through an oil return pipeline, and the oil pressure of the lubricating oil output by the oil distributing valve block is reduced.
10. The gas turbine lubricating oil system of claim 8,
the gas turbine lubricating oil system further comprises an oil mist separator (2);
the exhaust hole of the lubricating oil tank (7) and the air hole of the gas turbine gear box (4) are respectively communicated with the oil-mist separator (2) through pipelines;
the oil mist separator (2) is used for separating oil and air through coalescence and separation of oil mist, the separated lubricating oil flows back to the lubricating oil tank (7) through a separation oil return pipeline, and the separated air enters the flame arrester (1) and is finally discharged into the atmosphere.
11. The gas turbine lubricating oil system of claim 8,
a main pump overflow pipeline is arranged between a main pump pipeline from a main pump (21) to a main pump check valve (46) and the lubricating oil tank (7);
a main pump plug-in overflow valve (23) is arranged on the main pump overflow pipeline;
when the oil pressure in the main pump pipeline is larger than a set value, the main pump plug-in overflow valve (23) is opened, and a part of lubricating oil pumped out by the main pump (21) flows back to the lubricating oil tank (7) through the main pump overflow pipeline, so that the oil pressure in the main pump pipeline is reduced.
12. The gas turbine lubricating oil system of claim 8,
a main pump exhaust pipeline is arranged between a main pump pipeline from a main pump (21) to a main pump check valve (46) and the lubricating oil tank (7);
and a main pump exhaust flow restrictor (45) is arranged on the main pump exhaust pipeline.
13. The gas turbine lubricating oil system of claim 8,
the air-cooled radiator (36) is connected to the lubricating oil tank (7) through a radiator exhaust pipeline;
and a heat dissipation exhaust flow restrictor (37) is arranged in the radiator exhaust pipeline.
14. The gas turbine lubricating oil system of claim 8,
the main pump (21) is provided with an overflow bypass valve (22);
an oil inlet of the main pump (21) is connected with the main pump oil suction filter (20) through a pipeline;
a main pump suction filter (20) is disposed below the lubricating oil level in the lubricating oil tank (7).
15. The gas turbine lubricating oil system of claim 8,
the auxiliary pump (16) and the standby pump (11) are both provided with overflow bypass valves (22);
the auxiliary pump (16) and the oil inlet of the standby pump (11) are respectively connected with the auxiliary pump oil suction filter (13) through pipelines;
the auxiliary pump suction filter (13) is disposed below the level of the lubricating oil in the lubricating oil tank (7).
16. The gas turbine lubricating oil system of claim 8,
the oil supply pipeline of the gear box, the oil supply pipeline of the bearing chamber, the main pump pipeline, the oil inlet of the duplex filter (31) and the oil outlet of the duplex filter (31) are respectively provided with a pressure sensor (25);
pressure signals detected by the pressure sensors (25) at all positions are transmitted to the server;
and the server is used for monitoring the pressure in the pipeline in real time.
17. The gas turbine lubricating oil system of claim 8,
an oil inlet of the air cooling radiator (36), an oil outlet of the duplex filter (31), and an oil return pipeline from the gear box (4) to the lubricating oil tank (7) are respectively provided with a pipeline temperature sensor (5);
temperature signals at various positions detected by the pipeline temperature sensors (5) are transmitted to the server;
and the server is used for monitoring the temperature in the pipeline in real time.
18. The gas turbine lubricating oil system of claim 8,
an oil tank temperature sensor (35) and a liquid level sensor (18) are arranged on the lubricating oil tank (7);
a temperature signal detected by a fuel tank temperature sensor (35) and a liquid level signal detected by a liquid level sensor (18) are sent to the server;
and the server is used for monitoring the oil temperature and the liquid level in the lubricating oil tank (7) in real time.
19. The gas turbine lubricating oil system of claim 8,
a pressure difference meter (43) is arranged between an oil inlet and an oil outlet of the duplex filter;
a pressure gauge (28) is arranged at an oil outlet of the duplex filter;
a thermometer (40) is arranged at each oil inlet of the duplex filter;
a liquid level meter (19) is arranged on the lubricating oil tank (7).
20. The gas turbine lubricating oil system of claim 8,
a heater (8) is arranged in the lubricating oil tank (7);
the heater (8) starts heating when the temperature of the lubricating oil in the lubricating oil tank (7) is lower than a set low temperature value;
the set low temperature value is lower than the set high temperature value.
21. The gas turbine lubricating oil system of claim 20,
the set high temperature value is 50 ℃;
the set low temperature value was 10 ℃.
22. The gas turbine lubricating oil system of claim 8,
pressure switches (9) are respectively arranged on the auxiliary pump pipeline, the standby pump pipeline and the main oil supply pipeline between the duplex filter and the oil combining valve block;
and the control circuit controls the start and stop of the gas turbine according to the state of each pressure switch.
23. The gas turbine lubricating oil system of claim 1,
and the lubricating oil tank (7) is integrated on the skid-mounted base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011487645.4A CN112523870A (en) | 2020-12-16 | 2020-12-16 | Gas turbine lubricating oil system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011487645.4A CN112523870A (en) | 2020-12-16 | 2020-12-16 | Gas turbine lubricating oil system |
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| CN112523870A true CN112523870A (en) | 2021-03-19 |
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| CN202011487645.4A Pending CN112523870A (en) | 2020-12-16 | 2020-12-16 | Gas turbine lubricating oil system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114233476A (en) * | 2021-12-13 | 2022-03-25 | 中国船舶重工集团公司第七0三研究所 | Gas turbine lubricating system |
| CN115045989A (en) * | 2022-07-19 | 2022-09-13 | 南京高速齿轮制造有限公司 | Transmission lubricating system and fan |
-
2020
- 2020-12-16 CN CN202011487645.4A patent/CN112523870A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114233476A (en) * | 2021-12-13 | 2022-03-25 | 中国船舶重工集团公司第七0三研究所 | Gas turbine lubricating system |
| CN115045989A (en) * | 2022-07-19 | 2022-09-13 | 南京高速齿轮制造有限公司 | Transmission lubricating system and fan |
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