This paper relates to the technical field of gas turbine fuel system, especially to a gas turbine fuel distributing device.
Background technology:
In the past, the gas turbine fuel system generally adopts single oil route to supply oil to the combustion chamber, and part of the fuel system that adopts double oil route is composed of two completely independent single oil routes, with complex structure and poor reliability.With the increasing requirements on gas turbine performance, the traditional fuel supply mode cannot meet the fuel supply and atomization requirements of gas turbine in various working conditions, which often leads to unstable combustion flame, low combustion efficiency and uneven distribution of temperature at the outlet of combustion chamber, and even leads to ignition failure or extinction.Therefore, a simple, reliable and compact dual-oil fuel system of valve is of great significance to the performance improvement and stable operation of gas turbine. The fuel distribution device of valve in this paper makes the fuel system adopt dual-oil supply mode with compact structure, which can greatly improve the simplicity and reliability of fuel system.
The content of valve
The flaw and the insufficiency of existing technology, this paper provides a gas turbine fuel distribution device, installed in the fuel system after fuel regulating device, fuel can be divided into two road, all the way for the gas turbine starter nozzle, for gas turbine engine ignition starting up, all the way for the gas turbine main fuel nozzle, gas turbine running, the two road fuel can be cut off or open, respectively.The device can obviously optimize the success rate of gas turbine ignition and the temperature distribution at the outlet of combustion chamber, and improve the gas turbine performance and reliable running time.
The technical solutions adopted to solve its technical problems are as follows:
A gas turbine fuel distribution device, including an acceleration regulator and a starting solenoid valve, is characterized by,
Speed regulating device for terminating described general formula fuel distribution device, including an inlet, has always been the main lines and always right main lines, as described in inlet pipe through the upper reaches of the fuel supply circuit is connected, described in the main lines down is divided into down branches and branches to the right road, described in the branch road and down gas turbine fuel oil cylinders connected;
Described starter solenoid valve for three-pass solenoid valve, normally closed port, often described beginning and described public port mouth, described described often start mouth and speed adjusting device of main lines connected to the right, normally closed port stated starting fuel oil connected with gas turbine, the above mentioned in public port and speed adjusting device of the branch road, connected to the right.
Preferably, a manual adjusting nut is arranged in the downward main oil path of the acceleration adjusting device to adjust the oil supply ratio of the downward branch road and the right branch road.
Further, a control valve is arranged on the downward branch of the acceleration regulating device.
Preferably, when the starting solenoid valve is in the state of power failure, the normal opening port is opened and the normally closed port is closed, and the fuel of the acceleration regulating device is fully fed into the main fuel oil circuit located in its downstream.
Preferably, when the starting solenoid valve is energized, the normal opening port is closed and the normally closed port is opened. After the fuel passes through the acceleration regulating device, the main oil circuit to the right is closed and the right branch passes through the public port and the normally closed port to the starting fuel circuit.
Further, in the process of starting the gas turbine, when the gas turbine speed rises to around 4% of the rated speed, the starting solenoid valve is energized, the control valve on the downward branch is closed, and the fuel oil goes to the starting fuel oil through the public port and normally closed port on the right branch.When the gas turbine speed rises to about 10% of the rated speed, the control valve on the lower branch road is opened, and the fuel oil goes to the main fuel oil road through the lower branch road at the same time.When the gas turbine speed rises to about 96% of the rated speed, the starting solenoid valve loses power, and the fuel oil of the acceleration regulating device is fully fed into the main fuel oil circuit located downstream.
Gas turbine fuel distribution device, its working principle is:
The fuel oil enters the device through the fuel pump, fuel filter and fuel regulating device in the fuel system. After the acceleration regulating device, the fuel oil is divided into two ways: downward and right.The acceleration regulator can manually adjust the depth of the needle valve insert orifice by adjusting the upper nut to adjust the ratio of downward and rightward fuel.The starting solenoid valve is a three-way solenoid valve with a constant start port, normally closed port and common port. The normal start port is connected to the right oil circuit port of the acceleration regulating device, the normally closed port is connected to the starting fuel oil circuit port, and the public port is connected to the right oil circuit port of the downward oil circuit of the acceleration regulating device.When the starting solenoid valve is energized, the normally open port is closed and the normally closed port is opened. After fuel enters the device and passes through the acceleration adjustment device, the right oil circuit is closed and the downward oil circuit is opened.The downward oil road is divided into two oil roads: downward and right. One road leads to the starting fuel oil road through the public port and normally closed port of the starting solenoid valve to the right, supplying oil to the starting fuel nozzle for ignition and starting of gas turbine.All the way down to the main fuel oil road, when the solenoid valve of the main fuel oil road is opened, the main fuel nozzle is supplied with oil for gas turbine operation.When the starter solenoid valve power, often beginning mouth open, normally closed the port closed, fuel after entering this device after speed adjusting device 1, divided into down and two to the right way, down oil to fuel oil cylinders, when the main fuel oil solenoid valve is opened to give priority to the fuel nozzle oil, oil to the right by the starter solenoid valve mouth often start and public port also leads to the main fuel oil, when the main fuel oil solenoid valve is opened to give priority to the fuel nozzle fuel supply.
In the process of gas turbine engine starting, when speed up to 4% of the rated speed, starting, electromagnetic valve, electric igniter to lighter, fuel from starting fuel nozzle was lit into atomization and combustion chamber, when speed up to 10% of the rated speed, the main fuel oil solenoid valve open, fuel by the main fuel nozzle into the combustion chamber at the same time, when the speed up to 96% of the rated speed, the starting electromagnetic valve power, fuel after entering this device after speed regulating device, divided into down and two to the right way, down oil to fuel oil cylinders, oil to the right by the starter solenoid valve often start and public port also leads to the main fuel oil,This increases the gas turbine's rate of acceleration.The action of starting the solenoid valve to cut off the power will cause a fuel step, which can provide enough fuel for the full load of the rated gas turbine speed.
Compared with existing technology, provide the gas turbine fuel distribution device, can make the fuel oil supply oil, fuel oil system has two road all the way to start the nozzle fuel supply, fuel supply all the way to give priority to the fuel nozzle, and when to stop oil to start the nozzle, fuel remit all the fuel nozzle, can improve the acceleration rate of gas turbine and gas turbine rated speed when loaded with enough fuel.The fuel distribution device provided by the utility model has a compact and compact structure and can improve the reliability of the fuel system.
Specific implementation mode
Gas turbine fuel distribution device, including speed adjusting device and a starter solenoid valve, speed regulating device for tourism general formula fuel distribution device, including an inlet, has always been the main lines, and always right main lines, oil inlet pipe through the upper reaches of the fuel supply circuit connected, oil is divided into main and branch road downward to the right road branch, branch down the road with the control valve and fuel oil cylinders connected with gas turbine;The starting solenoid valve is a three-way solenoid valve, including a normal start port, a normally closed port and a common port. The normal start port is connected to the right main oil circuit of the acceleration regulating device, the normally closed port is connected to the starting fuel oil circuit of the gas turbine, and the public port is connected to the right branch of the acceleration regulating device.
Fuel enters the unit through the fuel pump, fuel filter and fuel regulating device in the fuel system.The acceleration regulator can adjust the fuel ratio of the downward branch and the right branch by manually adjusting the depth of the needle valve insert into the orifice plate.When starting electromagnetic valve, ans often start mouth shut, open, normally closed port fuel after entering this device after speed regulating device, main lines close to the right, main lines open, down to the right branch path public ports and starter solenoid valve normally closed port to starting fuel oil, oil supply for starting fuel nozzle, used for gas turbine engine ignition starting;When the control valve on the branch is opened, the lower main oil road supplies oil to the main oil road for gas turbine operation.When the starting solenoid valve is cut off, the normal opening port is opened, and the normally closed port is closed. After entering this device and passing through the acceleration adjustment device, the fuel oil is completely fed into the main fuel oil circuit located in its downstream.
In particular, in the process of gas turbine engine starting, when speed up to 4% of the rated speed, starting, electromagnetic valve, electric igniter began to spark, fuel from starting fuel nozzle was lit into atomization and combustion chamber, when speed up to 10% of the rated speed, the main fuel oil solenoid valve open, fuel by the main fuel nozzle into the combustion chamber at the same time, when the speed up to 96% of the rated speed, the starting electromagnetic valve power, fuel after entering this device after speed regulating device, divided into down and two to the right way, down oil to fuel oil cylinders,The right oil path also leads to the main fuel oil path through the normal opening of the starting solenoid valve and the common port, thus increasing the gas turbine acceleration rate.The action of starting the solenoid valve to cut off the power will cause a fuel step, which can provide enough fuel for the full load of the rated gas turbine speed.
This knowledge provides the gas turbine fuel distribution device can be fuel oil supply oil, fuel oil system has two road all the way for starting the nozzle fuel supply, fuel supply all the way to give priority to the fuel nozzle, and when to stop oil to start the nozzle, fuel remit all the fuel nozzle, can improve the acceleration rate of gas turbine and gas turbine rated speed when loaded with enough fuel.The fuel distribution device is compact and compact, and can improve the reliability of fuel system.In addition, it needs to be explained that the specific embodiments described in this specification may be different in terms of the shape and name of the zero and component.
