CN111412028A - Lubricating oil supply system sharing direct-current power supply system and not provided with emergency oil pump - Google Patents
Lubricating oil supply system sharing direct-current power supply system and not provided with emergency oil pump Download PDFInfo
- Publication number
- CN111412028A CN111412028A CN202010209419.3A CN202010209419A CN111412028A CN 111412028 A CN111412028 A CN 111412028A CN 202010209419 A CN202010209419 A CN 202010209419A CN 111412028 A CN111412028 A CN 111412028A
- Authority
- CN
- China
- Prior art keywords
- oil
- lubricating oil
- oil pump
- power supply
- supply system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003921 oil Substances 0.000 title claims abstract description 185
- 239000010687 lubricating oil Substances 0.000 title claims abstract description 96
- 239000000314 lubricant Substances 0.000 claims description 5
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 6
- 230000001050 lubricating effect Effects 0.000 abstract 1
- 230000001737 promoting effect Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 6
- 230000001133 acceleration Effects 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000010729 system oil Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/18—Lubricating arrangements
- F01D25/20—Lubricating arrangements using lubrication pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/18—Lubricating arrangements
-
- 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
- F04B49/20—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 changing the driving speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N13/00—Lubricating-pumps
- F16N13/02—Lubricating-pumps with reciprocating piston
- F16N13/06—Actuation of lubricating-pumps
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/20—Controlling the acceleration or deceleration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
- H02P25/022—Synchronous motors
- H02P25/024—Synchronous motors controlled by supply frequency
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/04—Arrangements for controlling or regulating the speed or torque of more than one motor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N13/00—Lubricating-pumps
- F16N13/02—Lubricating-pumps with reciprocating piston
- F16N13/06—Actuation of lubricating-pumps
- F16N2013/063—Actuation of lubricating-pumps with electrical drive
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2207/00—Indexing scheme relating to controlling arrangements characterised by the type of motor
- H02P2207/05—Synchronous machines, e.g. with permanent magnets or DC excitation
Abstract
The invention relates to a lubricating oil supply system sharing a direct-current power supply system and not provided with an emergency oil pump, which comprises a first oil supply module, a second oil supply module, a lubricating oil processing module, a shared direct-current power supply system and a lubricating oil outlet, wherein the outlet end of the shared direct-current power supply system is provided with 2 parallel branches which are respectively connected with the power inlet end of the first oil supply module and the power inlet end of the second oil supply module. And the lubricating oil outlet end of the first oil supply module and the lubricating oil outlet end of the second oil supply module are connected with the inlet end of the lubricating oil processing module after being mutually converged. The inlet end of the lubricating oil treatment module is provided with an accident switching valve which is connected with an accident channel and a normal channel, and the outlet of the accident channel and the outlet of the normal channel are communicated with the lubricating oil outlet after being converged. The oil pump realizes the continuous oil supply of a single oil pump, avoids the impact of an emergency oil pump when the oil pump is started quickly, completely avoids the probability of unsuccessful starting, and increases the selectable switching of the lubricating and oil-changing treatment process, thereby improving the running stability of the generator set and further promoting the economic and social benefits.
Description
Technical Field
The invention relates to the field of thermal power generation, in particular to a lubricating oil supply system which shares a direct-current power supply system and is not provided with a crisis oil pump.
Background
A power generating unit in a thermal power plant is a machine that rotates at high speed during power generating operation, and a large amount of oil is required for lubrication and cooling of an operation coupling portion between a support bearing and a thrust bearing and a friction portion that operates at high speed. The oil supply system for supplying lubricating oil as a generator set causes serious damage to the equipment of the generator set even if a short interruption occurs, and therefore, it is necessary to ensure continuous and stable operation of the lubricating oil system.
At present, lubricating oil supply systems of generator sets in thermal power plants are mainly two types:
the system 1: when starting, 1 start/stop oil pump driven by AC motor, coaxial working oil pump of main machine large shaft and 1 emergency oil pump driven by DC motor are used.
And (3) system 2: start/stop and working oil pump driven by 2 AC motors + emergency oil pump driven by 1 DC motor.
The system 1 is mainly characterized in that an oil pump driven by an alternating current motor is used during starting and stopping, a coaxial oil pump installed on a shaft of a turbogenerator is used for supplying oil during normal operation, and a critical oil pump driven by a direct current motor is started for supplying oil during accidents. Because the shafting of the generator set is very big in mass and therefore very big in inertia, when an accident happens, the time for reducing the rated rotating speed to the state of not meeting the oil supply condition by only relying on the inertia of the generator set is about 1 minute or more, and therefore, the starting time of the critical oil pump driven by the direct current motor is not required to be very fast once the accident happens in the system. However, the system 2 is different from the system 1, and is the same as the system 1 in normal start/stop, and also adopts an oil pump driven by an alternating current motor as a start oil pump and a stop oil pump, but still adopts an oil pump driven by an alternating current motor as a working oil pump when the generator set is in normal operation; in case of accident, because the inertia of the ac motor and the oil pump driven by the ac motor is very small, the oil pump will not provide enough lubricating oil quickly once the motor is out of power, and therefore, the emergency oil pump driven by the dc motor must be started at a fast speed to provide lubricating oil for the generator set instead of the working oil pump in a short time, so as to ensure that the supply of lubricating oil is not interrupted, so as to prevent the shafting of the generator set from being damaged.
The dc motors driving the critical oil pumps in both systems 1 and 2 described above have certain disadvantages: due to the structure of the dc motor, a commutator (also referred to as a "commutator") of the motor has a problem of wear, and generates a large amount of heat during operation, and is liable to form a "ring fire". This is very dangerous for generators using hydrogen cooling. There is also a serious drawback to system 2: in case of an accident, a quick start is necessary, otherwise the supply of lubricating oil may be interrupted, which endangers the safety of the generator set shafting.
In view of the problems existing in the lubricating oil system, in order to reduce the risk of oil supply interruption and meet the requirement that the supply of the lubricating oil needs to be quickly restored to a normal state when an accident starts, a brand new lubricating oil driving mode needs to be provided, so that the reliability of the lubricating oil system is greatly improved, meanwhile, the impact on a power supply system can be reduced, the supply of the lubricating oil is ensured not to be interrupted, the operation stability of a generator set can be improved, the probability and the risk of shaft system damage of the generator set are reduced, the operation time of the generator set is prolonged, and the economic and social benefits are further improved.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention provides a lubricating oil supply system without an emergency oil pump, which changes the system structure of the emergency oil pump driven by 2 ac motors and 1 dc motor in the prior lubricating oil system. When 2 main oil pumps are normally started, stopped and operated, a common direct-current power supply system is adopted to be driven by the inverters and the motors, and in an accident, the output frequency of one inverter is only required to be quickly increased to a preset value, and meanwhile, the accident switching valve is switched to an accident position to meet the supply requirement of lubricating oil. Even in case of an accident, the output of the inverter may not be changed, and only the accident switching valve is switched to the accident position.
The specific process is that when an accident starts, for a motor needing rapid speed increase, the speed increase is started from a certain low speed in a rotating state, static resistance torque does not need to be overcome, and the speed increase range is only started from a certain low speed state, so that the time required by speed increase is short, and the requirement of continuous supply of lubricating oil is met more easily. Meanwhile, the inverter can be used for realizing slow start and stop of the oil pump, so that the impact on equipment is reduced, the service life of lubricating oil system equipment is prolonged, the running time of a generator set is prolonged, and economic and social benefits are improved.
The technical means adopted by the invention are as follows.
The utility model provides a sharing DC power supply system does not establish lubricating oil feeding system of critical oil pump, includes first oil feeding module, second oil feeding module, lubricating oil processing module, sharing DC power supply system and lubricating oil export, its characterized in that, the exit end of above-mentioned sharing DC power supply system sets up 2 parallelly connected branches and is connected with the power entry end of above-mentioned first oil feeding module and the power entry end of above-mentioned second oil feeding module respectively. And the lubricating oil outlet end of the first oil supply module and the lubricating oil outlet end of the second oil supply module are connected with the inlet end of the lubricating oil treatment module after being mutually converged. The inlet end of the lubricating oil treatment module is provided with an accident switching valve, the accident switching valve is connected with an accident channel and a normal channel, and the outlet of the accident channel and the outlet of the normal channel are communicated with the lubricating oil outlet after being converged.
Furthermore, an oil cooler and an oil filter are sequentially arranged on the normal channel.
Further, the common dc power supply system includes an ac power supply system, and a rectifier and a battery pack are sequentially connected to the output terminal.
Further, the first oil supply module comprises a first inverter, a first motor and a first main oil pump which are sequentially connected from the power supply inlet end to the lubricating oil outlet end.
Further, the second oil supply module comprises a second inverter, a second motor and a second main oil pump which are sequentially connected from the power supply inlet end to the lubricating oil outlet end.
Further, the first motor and the second motor are the same ac inverter motor or ac permanent magnet synchronous motor. The first main oil pump and the second main oil pump are the same oil pump. The first inverter and the second inverter are the same inverter.
Further, when the rated voltage of the first motor and the rated voltage of the second motor are 220V, the rated voltage of the common dc power supply system is 380V.
Further, when the rated voltage of the first motor and the rated voltage of the second motor are 380V, the rated voltage of the common dc power supply system is 540V.
Further, an oil pressure detection device and a check valve are arranged at the outlets of the branches where the first main oil pump and the second main oil pump are located.
Furthermore, an oil pressure detection device is arranged at the lubricating oil outlet.
The beneficial effects produced by the invention are as follows.
The novel lubricating oil supply system which shares a direct-current power supply system and is not provided with a crisis oil pump improves the original driving oil pump mode, and realizes slow start or stop of two main oil pumps through the power supply of the motor driven by the inverter and the direct-current power supply system, and simultaneously realizes short acceleration time and high acceleration speed required in an accident, thereby greatly improving the reliability of the lubricating oil system. Meanwhile, the impact on a power supply system can be reduced, and the supply of lubricating oil is ensured not to be interrupted, so that the running stability of the generator set can be improved, the probability and risk of damage of a shaft system can be reduced, the running time of the generator set can be prolonged, and the economic and social benefits can be further improved. Will further embody than current oil feeding system than beneficial effect:
1. when the generator set normally operates, if certain accident occurs to cause the pressure of lubricating oil to drop, 1 of the 2 main oil pumps can quickly increase the output frequency through the inverter by preset setting so that the main oil pump driven by the main oil pump can quickly increase the rotating speed until a single main oil pump meets the supply requirement of the lubricating oil;
2. the method is characterized in that a special emergency oil pump and a corresponding driving motor (usually a direct current motor or even a special customized direct current motor) are not arranged, the rapid starting technology of the emergency oil pump motor is not adopted, and the continuous supply of lubricating oil is ensured by adopting a method for accelerating the running motor. Therefore, the reaction speed of the system is higher than that of a system provided with a special emergency oil pump, and the motor starts to accelerate in a state of operating at medium and low speed, so that the time required for reaching high speed meeting the oil supply requirement is short, and the safety of the system is higher;
and 3, an accident switching valve is arranged at the inlet end of the lubricating oil treatment system, and when an accident occurs to the oil supply system, the accident switching valve is switched to an accident state, so that the oil cooler and the oil filter are bypassed, the resistance of the lubricating oil treatment system is reduced, and the single motor driven oil pump can meet the lubricating oil supply requirement.
Drawings
Fig. 1 is a schematic view of a lubricating oil supply system without a crisis oil pump and sharing a dc power supply system according to the present invention.
Detailed Description
The invention protects a lubricating oil supply system which shares a direct current power supply system and is not provided with a crisis oil pump. As shown in fig. 1, the system includes a first oil supply module 11, a second oil supply module 12, a lubricating oil treatment module 13, a common dc power supply system 15, and a lubricating oil outlet 14. The specific characteristic is that the outlet end of the common dc power system 15 is provided with 2 parallel branches which are respectively connected with the power inlet end of the first oil supply module 11 and the power inlet end of the second oil supply module 12. The lubricating oil outlet end of the first oil supply module 11 and the lubricating oil outlet end of the second oil supply module 12 are joined to each other and then connected to the inlet end of the lubricating oil processing module 13. An accident switching valve 131 is disposed at an inlet end of the lubricating oil treatment module 13, the accident switching valve 131 is connected to an accident channel 132 and a normal channel 133, and an outlet of the accident channel 132 and an outlet of the normal channel 133 are merged and then communicated with the lubricating oil outlet 14. The main oil pumps in the first oil supply module 11 and the second oil supply module 12 connected to the common dc power supply system 15 are used as oil pumps for normal start, stop and operation, and as emergency oil pumps in case of an accident. The accident switching valve 131 can selectively enter the normal channel 133 of the lubricant processing system 13 or selectively connect to the lubricant outlet 14 through the accident channel 132 according to different situations. When the normal passage 133 is selected, the oil is passed in turn to a condenser and oil filter etc., otherwise directly to the oil outlet 14. The quality of the lubricating oil after being processed by the oil cooler and the oil filter under normal conditions can be ensured, the resistance can be reduced when an accident occurs, the oil supply capacity is improved, and the oil supply requirement is ensured to be met.
Meanwhile, as shown in fig. 1, the present invention has the following further features.
The normal passage 133 is provided with an oil cooler and an oil filter in this order. The common dc power supply system 15 includes an ac power supply system 151, and a rectifier 152 and a battery pack 153 are connected to an output terminal in this order. The first oil supply module 11 includes a first inverter 112, a first motor 113, and a first main oil pump 111 connected in sequence from a power supply inlet port to a lubricating oil outlet port. The second oil supply module 12 includes a second inverter 122, a second motor 123, and a second main oil pump 121 connected in sequence from the power supply inlet end to the lubricating oil outlet end. The first motor 113 and the second motor 123 are the same ac inverter motor or ac permanent magnet synchronous motor. The first main oil pump 111 and the second main oil pump 121 are the same oil pump. The first inverter 112 and the second inverter 122 are the same inverter. When the rated voltage of the first motor 113 and the second motor 123 is 220V, the rated voltage of the common dc power supply system 15 is 380V. When the rated voltage of the first motor 113 and the second motor 123 is 380V, the rated voltage of the common dc power supply system 15 is 540V. An oil pressure detection device and a check valve are disposed at the outlets of the branches where the first main oil pump 111 and the second main oil pump 121 are located. An oil pressure detecting device is provided at the lubricant outlet 14.
The invention has the following characteristics in practical application.
When the generator set is started, all the common direct-current power supply system 15 is normal due to normal operation, and at this time, one of the first main oil pump 111 and the second main oil pump 121 can be started at will and can meet the oil supply requirement in a state close to full speed. After the first main oil pump 111 is started, the second main oil pump 121 should be started, and the rotating speed of the operating first main oil pump 111 is gradually reduced, so that finally 2 main oil pumps run simultaneously and all the main oil pumps run at lower speeds, but the requirement of oil supply is met.
When the generator set is stopped, the first main oil pump 111 and the second main oil pump 121 are stopped in sequence with the reduction of the lubricating oil demand.
When accidents such as sudden loss of an alternating current power supply, faults of any 1 motor/oil pump, faults of an oil cooler and/or an oil filter, reduction of the oil pressure at the outlet of a lubricating oil treatment system beyond an allowable value and the like occur, one main oil pump can replace a critical oil pump to output single lubricating oil, and the main oil pump is switched to an accident channel to output the lubricating oil. The specific implementation process includes: when the ac power supply system 151 is suddenly lost, the rectifier 152 will not input power, and at this time, the output frequency of the first inverter 112 or the second inverter 122 will be rapidly increased by a preset selection to rapidly increase the rotation speed of the first motor 113 or the second motor 123, thereby rapidly increasing the output of the first main oil pump 111 or the second main oil pump 121, while the accident switching valve 131 is switched from the normal on position (left side) to the accident on position (right side), and subsequently, the output frequency of the second inverter 122 or the first inverter 112 will be gradually decreased, thereby gradually stopping the second motor 123 or the first motor 112. Meanwhile, the accident switching valve 131 is directly connected to the lubricating oil outlet 14 through the accident channel 132, so that the resistance is reduced when an accident occurs, the oil supply capacity is improved, and the oil supply requirement is ensured to be met.
In the event of an accident, for example, when any one of the motors fails or any one of the main oil pumps fails, the output frequency of the other inverter is increased and the accident switching valve 131 is switched to the accident side as long as a drop in the lubricating oil pressure to be output is detected, thereby ensuring that the supply of the lubricating oil meets the requirement. The accident detection is realized by an oil pressure detection device arranged at the outlet of each main oil pump and a check valve.
When the oil cooler or the oil filter fails, the output frequency of one inverter is increased as long as the reduction of the lubricating oil pressure of the total output is detected, and the accident switching valve 131 is switched to the accident side, so that the supply of the lubricating oil is ensured to meet the requirement. This failure determination is performed by an oil pressure detection device provided in the lubricating oil outlet 14. For this case, the output frequency of one motor-corresponding inverter, which is designated in advance by the control system, will quickly rise from the lower frequency of normal operation to a predetermined high speed. Since the motor is accelerated from a low speed to a high speed in a rotating state, the acceleration speed is obviously faster than that of a critical oil pump started from a static state, so that the oil supply speed is higher, and in addition, the accident switching valve 131 is switched to an accident position when the acceleration starts, so that the lubricating oil output by the lubricating oil pump does not pass through an oil cooler and an oil filter any more, the resistance of a lubricating oil processing system is also rapidly and greatly reduced, and the lubricating oil supply can be ensured to meet the requirement all the time.
Other exemplary incident handling schemes in implementation are as follows.
1. The common dc power supply system 15 loses the ac power supply 151 or the rectifier 152 is damaged. The 1 inverter in operation will now be caused to rapidly increase the output frequency immediately. The speed of the motor driven by the inverter is increased, the oil supply amount of the corresponding main oil pump is increased, and the output frequency of the other inverter is reduced at the same time, so that the rotating speed of the motor driven by the inverter is gradually reduced until the motor is stopped. This is to reduce the losses when the two motors are running simultaneously. The simpler method is to directly switch the accident switching valve 131 to the accident position, and the rotation speeds of the two motors are kept unchanged, so that the loss of the motors can be reduced, and the oil supply can be realized without interruption.
2. And any inverter (and/or the corresponding alternating current variable frequency motor and the corresponding main oil pump) has a fault. At the moment, the pressure of the lubricating oil is reduced, the output frequency of the other inverter is rapidly increased, the speed of the motor driven by the inverter is rapidly increased, and the output of the corresponding main oil pump is increased until the requirement is met. When any one main oil pump in operation stops operating due to reasons, the trip signal of the main oil pump motor inverter and the system oil pressure drop signal can be used for forming an OR condition, the output frequency of the other inverter in operation is rapidly increased, the output of the other main oil pump is rapidly increased, and the uninterrupted supply of lubricating oil is met.
The invention provides a lubricating oil supply system sharing a direct current power supply system without a crisis oil pump through innovatively providing a lubricating oil supply system sharing the direct current power supply system, under the condition of not arranging a special critical oil pump, 2 main oil pumps run simultaneously, the running conditions of the main oil pumps are monitored constantly, the continuous supply of lubricating oil is ensured, when an accident happens, 1 of the main oil pumps rapidly increases the rotating speed and bypasses an oil cooler and an oil filter, the single oil pump is ensured to be free from oil interruption, the continuous supply of the lubricating oil is met, the reliability of the lubricating oil system is greatly improved, the impact on the power supply system is reduced, the impact of the critical oil pump during rapid starting is avoided, the starting probability is completely avoided, the uninterrupted supply of the lubricating oil is ensured, the running stability of a generator set can be improved, the probability and risk of damage of a shafting of the generator set are reduced, and the running time of the generator set is, further improving economic and social benefits.
Claims (10)
1. The utility model provides a sharing DC power supply system and do not establish lubricating oil feeding system of critical oil pump, includes first oil feeding module (11), second oil feeding module (12), lubricating oil processing module (13), sharing DC power supply system (15) and lubricating oil export (14), its characterized in that: the outlet end of the common direct-current power supply system (15) is provided with 2 parallel branches which are respectively connected with the power supply inlet end of the first oil supply module (11) and the power supply inlet end of the second oil supply module (12);
the lubricating oil outlet end of the first oil supply module (11) and the lubricating oil outlet end of the second oil supply module (12) are converged and then connected with the inlet end of the lubricating oil processing module (13); the inlet end of the lubricating oil treatment module (13) is provided with an accident switching valve (131), the accident switching valve (131) is connected with an accident channel (132) and a normal channel (133), and the outlet of the accident channel (132) and the outlet of the normal channel (133) are communicated with the lubricating oil outlet (14) after being converged.
2. The system for supplying lubricating oil without a critical oil pump, sharing a dc power supply system according to claim 1, wherein a cooler and an oil filter are provided in sequence on the normal passage (133).
3. The system according to claim 1, wherein the common dc power supply system (15) comprises an ac power supply system (151) and a rectifier (152) and a battery pack (153) are connected to the outlet side.
4. The system according to claim 1, wherein the first oil supply module (11) comprises a first inverter (112), a first motor (113) and a first main oil pump (111) connected in sequence from a power inlet to a lubricant outlet.
5. The system according to claim 1, wherein the second oil supply module (12) comprises a second inverter (122), a second motor (123) and a second main oil pump (121) connected in sequence from a power inlet to a lubricant outlet.
6. The system for supplying lubricating oil without a critical oil pump according to claim 4 or 5, characterized in that said first electric motor (113) and said second electric motor (123) are identical AC variable frequency motors or AC permanent magnet synchronous motors;
the first main oil pump (111) and the second main oil pump (121) are the same oil pump;
the first inverter (112) and the second inverter (122) are the same inverter.
7. The system for supplying lubricating oil according to claim 3, 4 or 5, wherein the rated voltage of the common DC power supply system (15) is 380V when the rated voltage of the first electric motor (113) and the second electric motor (123) is 220V.
8. The system for supplying lubricating oil according to claim 3, 4 or 5, wherein the rated voltage of the common DC power supply system (15) is 540V when the rated voltage of the first electric motor (113) and the second electric motor (123) is 380V.
9. The system according to claim 3, 4 or 5, wherein an oil pressure detecting device and a check valve are provided at the outlets of the branches of the first main oil pump (111) and the second main oil pump (121).
10. The system for supplying lubricating oil without a critical oil pump according to claim 3, 4 or 5, wherein an oil pressure detecting device is provided at the lubricating oil outlet (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010209419.3A CN111412028A (en) | 2020-03-23 | 2020-03-23 | Lubricating oil supply system sharing direct-current power supply system and not provided with emergency oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010209419.3A CN111412028A (en) | 2020-03-23 | 2020-03-23 | Lubricating oil supply system sharing direct-current power supply system and not provided with emergency oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111412028A true CN111412028A (en) | 2020-07-14 |
Family
ID=71491634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010209419.3A Pending CN111412028A (en) | 2020-03-23 | 2020-03-23 | Lubricating oil supply system sharing direct-current power supply system and not provided with emergency oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111412028A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204024729U (en) * | 2014-04-23 | 2014-12-17 | 大唐河北发电有限公司马头热电分公司 | A kind of Novel backwashing bypath system |
| JP2016031045A (en) * | 2014-07-29 | 2016-03-07 | 三菱電機株式会社 | Emergency power supply system of gas turbine power generation plant |
| CN206299414U (en) * | 2016-12-08 | 2017-07-04 | 中国华电集团贵港发电有限公司 | The self-holding type turbo-engine lube oil supply system of pressure |
| JP2017155665A (en) * | 2016-03-02 | 2017-09-07 | 株式会社東芝 | Turbine turning device |
| CN211950608U (en) * | 2020-03-23 | 2020-11-17 | 中国电力工程顾问集团华北电力设计院有限公司 | Lubricating oil supply system sharing direct-current power supply system and not provided with emergency oil pump |
-
2020
- 2020-03-23 CN CN202010209419.3A patent/CN111412028A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204024729U (en) * | 2014-04-23 | 2014-12-17 | 大唐河北发电有限公司马头热电分公司 | A kind of Novel backwashing bypath system |
| JP2016031045A (en) * | 2014-07-29 | 2016-03-07 | 三菱電機株式会社 | Emergency power supply system of gas turbine power generation plant |
| JP2017155665A (en) * | 2016-03-02 | 2017-09-07 | 株式会社東芝 | Turbine turning device |
| CN206299414U (en) * | 2016-12-08 | 2017-07-04 | 中国华电集团贵港发电有限公司 | The self-holding type turbo-engine lube oil supply system of pressure |
| CN211950608U (en) * | 2020-03-23 | 2020-11-17 | 中国电力工程顾问集团华北电力设计院有限公司 | Lubricating oil supply system sharing direct-current power supply system and not provided with emergency oil pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0154626B1 (en) | Uninterruptible power system | |
| CN211950608U (en) | Lubricating oil supply system sharing direct-current power supply system and not provided with emergency oil pump | |
| JP3322060B2 (en) | Power plant and power plant control device | |
| US7952316B2 (en) | Variable frequency reduced speed variation electric drive | |
| US20130270902A1 (en) | Fault Protection System For A Power System Of Dynamically Positioned Vessel | |
| EP3726012B1 (en) | Gas turbine engine generator oil pump | |
| WO2015123523A1 (en) | Power system for providing an uninterruptible power supply to an external load | |
| CN109936215B (en) | Uninterrupted power supply system of magnetic suspension flywheel energy storage device | |
| WO2014193238A1 (en) | Fault tolerant power supply for active magnetic bearing | |
| CN211819532U (en) | Lubricating oil supply system of independent direct current power supply system without emergency oil pump | |
| CN107112929B (en) | Drive train and method for operating a drive train | |
| CN111412027A (en) | Lubricating oil supply system of independent direct current power supply system without emergency oil pump | |
| CN111412026A (en) | Lubricating oil supply system allowing DC accident oil pump motor to be started slowly | |
| CN111412028A (en) | Lubricating oil supply system sharing direct-current power supply system and not provided with emergency oil pump | |
| CN211202070U (en) | Lubricating oil supply system allowing DC accident oil pump motor to be started slowly | |
| US9463708B2 (en) | Method for operating an electric traction drive system, and associated control apparatus | |
| CN101179250B (en) | Control method of non-sensor permenant-magnetic synchronous motor | |
| US20230072590A1 (en) | Redundant electrically driven fuel and oil pumping system for gas turbines | |
| CN210266659U (en) | Lubricating oil supply system composed of variable frequency motor and direct current motor | |
| EP2611994B1 (en) | Method for stopping a turboset | |
| CN102778847B (en) | Automatic shutdown method of electric towing turbine unit in failure of controlling system and oil system | |
| CN113266557A (en) | Active band-type brake system of polyester melt metering pump for chemical industry | |
| CN210462405U (en) | Lubricating oil supply system composed of permanent magnet brushless motor and direct current motor | |
| CN111412370A (en) | Lubricating oil supply system composed of variable frequency motor and direct current motor | |
| US11702990B2 (en) | Redundant electrically driven fuel and oil pumping system for gas turbine with bidirectional pump motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |