CN207740086U - A kind of gas turbine self-regulation fueller - Google Patents

Abstract

The utility model discloses a gas turbine self-regulating oil supply device, which comprises a pressure difference regulating valve, a speed and a height compensator, the fuel oil inlet of the pressure difference regulating valve is connected with the upstream fuel supply pipeline, and the fuel oil outlet is connected with the downstream fuel oil supply pipeline. The pipeline of the nozzle is connected, and the spool connecting rod of the pressure difference regulating valve protrudes from the top of the right end of the valve body to connect with the speed and height compensator arranged on the outside right side of the pressure difference regulating valve; it is installed before the fuel nozzle in the fuel system. It can automatically adjust the fuel supply of the fuel system to the gas turbine according to the ambient atmospheric pressure and the pressure after the compressor, so as to ensure the continuous and stable fuel supply of the fuel system and the safe and stable operation of the gas turbine. At the same time, it can ensure the successful start of the gas turbine at different altitudes.

Description

A gas turbine self-regulating oil supply device

technical field

The utility model relates to the technical field of gas turbine fuel systems, in particular to a gas turbine self-regulating oil supply device.

Background technique

At a certain altitude, during the start-up acceleration process of the gas turbine, the outlet pressure of the compressor gradually increases. At this time, more fuel oil needs to be injected into the combustion chamber. The existing gas turbine fuel system increases the fuel supply according to the corresponding command of the control system. The oil supply method cannot quickly and continuously adjust the oil supply according to the increase of the gas turbine speed and the change of the pressure rise after the compressor. More, when the gas turbine is started at different altitudes, due to the different inlet atmospheric pressure, the starting oil supply is different. At this time, it is necessary to modify the oil supply law in the control system according to different altitudes. This makes the gas turbine used at different altitudes, It is necessary to program different oil supply laws in the control system, which greatly increases the development work of the control system. Therefore, a utility model that can automatically adjust the fuel supply according to the ambient atmospheric pressure and the pressure change after the compressor is of great significance to the rapid and continuous adjustment of the fuel supply during the start-up acceleration process of the gas turbine. At the same time, this device can greatly improve the applicability of the oil supply law in the control system when the gas turbine works at different altitudes.

Utility model content

Aiming at the above-mentioned defects and deficiencies of the prior art, the utility model provides a gas turbine self-regulating oil supply device, which is installed before the fuel nozzle in the fuel system, and can automatically adjust the fuel system to the gas turbine according to the ambient atmospheric pressure and the pressure behind the compressor. The fuel supply is guaranteed to ensure the continuous and stable fuel supply of the fuel system and the safe and stable operation of the gas turbine. At the same time, it can ensure the successful start of the gas turbine at different altitudes.

The technical scheme that the utility model adopts for solving its technical problem is:

A self-regulating oil supply device for a gas turbine, comprising a differential pressure regulating valve, a rotational speed and a height compensator, characterized in that,

--The pressure difference regulating valve includes a valve body and a valve core, and the valve core can slide left and right in the inner cavity of the valve body, wherein,

The left end of the valve body is provided with an oil hole communicating with its inner cavity. The oil hole is used to introduce hydraulic oil pressure. The supply pipeline is connected, and the middle part of the valve body is provided with a fuel outlet, and the fuel outlet is connected with the downstream pipeline leading to the fuel nozzle;

The left bottom of the spool is provided with a spring, and the top of the right is provided with a spool connecting rod, and the spool connecting rod protrudes from the top of the right end of the valve body and is arranged on the outside right side of the pressure difference regulating valve. speed and altitude compensator connections;

--The speed and height compensator includes a housing and a diaphragm arranged in the housing, a return spring, a horizontal connecting rod, an adjusting rod, and a bellows, wherein,

The inner cavity of the housing of the speed and height compensator includes an upper cavity, a lower cavity and a communication cavity connecting the upper cavity and the lower cavity, the diaphragm is arranged in the upper cavity, the The bellows is arranged horizontally in the lower cavity, and the adjusting rod is hinged vertically in the communicating cavity;

The diaphragm divides the upper cavity into a left upper cavity and a right upper cavity, the return spring is horizontally arranged in the right upper cavity, and the return spring is pressed against the membrane The right side of the sheet, and the right upper cavity is provided with a vent hole, and the vent hole introduces the pressure after the compressor; the left upper cavity communicates with the communicating cavity and the lower cavity, and the At least one of the left upper cavity, the communicating cavity and the lower cavity is provided with a ventilation hole, and the ventilation hole introduces ambient atmospheric pressure;

The left side of the diaphragm is connected to the right side of the upper end of the adjustment rod through the horizontal connecting rod arranged in the upper cavity of the left part, and the left side of the upper end of the adjustment rod is connected to the pressure difference regulating valve The spool connecting rod is connected, and the right side of the lower end of the adjusting rod is connected with the top of the bellows.

Preferably, the left side of the spool bears hydraulic oil pressure and spring force, the right side bears fuel pressure and the thrust of the speed and height compensator on the spool connecting rod, and the pressure difference between the left and right sides of the spool is Move left and right under the action, so as to control the opening of the fuel outlet of the pressure difference regulating valve, and then control the fuel flow leading to the downstream fuel nozzle.

Preferably, the right side of the upper end of the adjusting rod bears the pressure behind the compressor and the spring force, and the lower end bears the pressure of the bellows. The spool connecting rod of the regulating valve produces thrust.

Preferably, a fuel stop valve is arranged on the pipeline leading to the fuel nozzle.

Preferably, the fuel shut-off valve is a two-way fuel shut-off valve, which is a normally closed valve. When it is energized, the valve opens, and the fuel can flow into the downstream fuel nozzle. If the fuel shut-off valve is powered off, the gas turbine will Park normally.

Preferably, when the spool is at the left limit position, the fuel outlet is fully opened, when the spool is at the right limit position, the fuel outlet is completely closed, and the spool is at the left limit position When moving to the right limit position, the opening degree of the fuel outlet gradually decreases; on the contrary, when the spool moves from the right limit position to the left limit position, the opening degree of the fuel outlet gradually increases.

Preferably, at a certain altitude, during the start-up acceleration process of the gas turbine, as the outlet pressure of the compressor gradually increases, the pressure acting on the right side of the upper end of the adjusting rod will gradually increase, acting on the upper and lower ends of the adjusting rod The pressure difference gradually increases, and this gradually increasing pressure difference will cause the adjustment rod to rotate counterclockwise, and then the thrust of the adjustment rod on the spool connecting rod of the pressure difference regulating valve will increase, so that the spool Moving to the left, the opening of the fuel outlet of the differential pressure regulating valve increases, thereby increasing the fuel flow to the downstream fuel nozzle.

Preferably, at a certain altitude, when the speed of the gas turbine decreases, the pressure difference acting on the upper end and the lower end of the adjustment rod gradually decreases, so that the adjustment rod rotates clockwise, and then the spool of the pressure difference adjustment valve moves to the right Move, the fuel outlet opening decreases.

Preferably, as the altitude increases, the pressure difference acting on the upper end and the lower end of the adjustment rod decreases, so that the adjustment rod rotates clockwise, and then the adjustment rod has a positive effect on the spool of the pressure difference adjustment valve. The thrust of the connecting rod will decrease, so that the spool will move to the right, the opening of the fuel outlet of the differential pressure regulating valve will decrease, and then the fuel flow leading to the fuel nozzle will decrease.

Preferably, as the altitude decreases, the pressure difference acting on the upper end and the lower end of the adjustment rod increases, so that the adjustment rod rotates counterclockwise, and then the adjustment rod has a positive impact on the spool connecting rod of the pressure difference adjustment valve. The thrust will increase, so that the spool moves to the left, the opening of the fuel outlet of the differential pressure regulating valve increases, and the fuel flow leading to the fuel nozzle increases.

Compared with the prior art, the gas turbine self-regulating fuel supply device of the utility model is installed before the fuel nozzle in the fuel system, and can automatically adjust the fuel supply of the fuel system to the gas turbine according to the atmospheric pressure of the environment and the pressure behind the compressor, ensuring that the fuel oil The continuous and stable oil supply of the system and the safe and stable operation of the gas turbine can ensure the successful start of the gas turbine at different altitudes.

Description of drawings

Fig. 1 is a structural schematic diagram of a gas turbine self-regulating oil supply device of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings and examples. It should be noted that implementations not shown or described in the accompanying drawings are forms known to those of ordinary skill in the art. In addition, the directional terms mentioned in the following embodiments, such as "upper", "lower", "front", "backward", "left", "right", "top", "bottom", etc., are only for reference The orientation of the graph. Therefore, the directional terms used are used to illustrate but not to limit the present invention.

As shown in FIG. 1 , the gas turbine self-regulating oil supply device of the present invention includes a differential pressure regulating valve 1 , a speed and height compensator 2 and a fuel cut-off valve 3 .

The differential pressure regulating valve 1 includes a valve body 11 and a valve core 12. The valve core 12 can slide left and right in the inner cavity of the valve body 11. The left end of the valve body 11 is provided with an oil hole communicating with the inner cavity. The oil hole is used for In order to introduce hydraulic oil pressure, a fuel inlet is provided on the peripheral wall of the right end of the valve body 11, and the fuel inlet is connected with the upstream fuel supply pipeline. The pipeline is connected, and the fuel shut-off valve 3 is set on the pipeline leading to the fuel nozzle; the spring 13 is set on the left bottom of the spool 12, the spool connecting rod 14 is set on the right top of the spool 12, and the spool connecting rod 14 The top of the right end protruding out of the valve body 11 is connected with the speed and height compensator 2 arranged on the right side of the differential pressure regulating valve 1; the left side of the valve core 12 bears hydraulic oil pressure and spring force, and the right side bears fuel pressure, speed and height. The thrust of the height compensator 2 to the connecting rod 14 of the spool, the spool 12 can move left and right under the action of the left and right side pressure difference, thereby controlling the opening of the fuel outlet of the pressure difference regulating valve 1, and then controlling the fuel nozzle leading to the downstream When the spool 12 is at the limit position on the left, the fuel outlet is fully opened; when the spool 12 is at the limit position on the right, the fuel outlet is completely closed, and the spool 12 is limited from the left limit position to the right When the position moves, the opening of the fuel outlet gradually decreases; on the contrary, when the spool 12 moves from the right limit position to the left limit position, the opening of the fuel outlet gradually increases.

The speed and height compensator 2 includes a housing and a diaphragm 21 arranged in the housing, a return spring 22, a horizontal connecting rod 23, an adjustment rod 24, and a bellows 25. The inner cavity of the housing includes an upper cavity and a lower cavity. And the communication cavity connecting the upper cavity and the lower cavity, the diaphragm 21 is arranged in the upper cavity of the housing, the bellows 25 is horizontally arranged in the lower cavity of the housing, and the adjusting rod 24 is hinged in the vertical direction In the communicating cavity of the housing. Diaphragm 21 divides the upper cavity of the housing into left and right parts. A horizontally arranged return spring 22 is arranged in the upper right cavity. The return spring 22 is pressed against the right side of diaphragm 21, and the upper right cavity The body is provided with a vent hole, which introduces the pressure after the compressor; the left upper cavity communicates with the communicating cavity and the lower cavity of the shell, and at least one of the left upper cavity, the communicating cavity and the lower cavity One is provided with a ventilation hole, which introduces ambient atmospheric pressure; the left side of the diaphragm 21 is connected to the upper right side of the adjustment rod 24 through the horizontal connecting rod 23 arranged in the left upper cavity, and the upper end of the adjustment rod 24 The left side is connected with the spool connecting rod 14 of the differential pressure regulating valve 1 , and the right side of the lower end of the regulating rod 24 is connected with the top of the bellows 25 . The right side of the upper end of the adjustment rod 24 bears the pressure behind the compressor and the spring force, and the lower end bears the pressure of the bellows (i.e. ambient atmospheric pressure). The 24 spool connecting rod has a thrust.

At a certain altitude and a certain ambient atmospheric pressure, the fuel system needs to gradually increase the fuel supply to the fuel nozzle during the start-up and acceleration of the gas turbine. At this time, the ambient atmospheric pressure is constant, that is, the reaction force of the bellows 25 acting on the right side of the lower end of the adjusting rod 24 is constant, and the outlet pressure of the compressor gradually increases, and the pressure acting on the right side of the upper end of the adjusting rod 24 will gradually increase. The pressure difference acting on the upper end and the lower end of the adjusting rod 24 gradually increases accordingly, and the pressure difference acting on the upper end and the lower end of the adjusting rod 24 = the pressure behind the compressor - the ambient atmospheric pressure, so the pressure difference acting on the upper end and the lower end of the adjusting rod 24 Gradually increasing, this gradually increasing pressure difference will make the adjustment rod 24 rotate counterclockwise, and then the thrust of the adjustment rod 24 on the spool connecting rod 14 of the pressure difference regulating valve 1 will increase, so that the spool 12 will move to the left , the opening of the fuel outlet of the pressure difference regulating valve 1 increases, and then the fuel flow to the fuel nozzle increases, achieving the effect of increasing the fuel supply.

Similarly, at a certain altitude, when the speed of the gas turbine decreases, the fuel flow required by the fuel nozzle decreases. At this time, the ambient atmospheric pressure remains unchanged, the pressure behind the compressor gradually decreases, and the pressure difference between the upper end and the lower end of the regulating rod 24 gradually decreases. The adjusting rod 24 is rotated clockwise, and the spool 12 of the differential pressure regulating valve 1 moves to the right, and the opening of the fuel outlet is reduced, so as to achieve the effect of reducing the fuel supply.

When the gas turbine starts to operate at different altitudes, as the altitude increases, the amount of fuel required for starting decreases. If the gas turbine is supplied with oil according to the fuel supply rules in the low-altitude environment, it will easily cause the gas turbine to be rich in oil, flameout, overheating, etc. question. The pressure ratio of the compressor remains unchanged at the same speed of the gas turbine, and the pressure behind the compressor = the pressure in front of the compressor (ambient atmospheric pressure) * pressure ratio, and the pressure difference between the upper end and the lower end of the regulating rod 24 = pressure behind the compressor - ambient atmospheric pressure =(pressure ratio-1)*environmental atmospheric pressure, as the altitude increases, the ambient atmospheric pressure decreases, so the pressure difference acting on the upper end and the lower end of the adjusting rod 24 decreases, so that the adjusting rod 24 rotates clockwise, and then the adjusting rod 24 The thrust on the spool connecting rod 14 of the differential pressure regulating valve 1 will decrease, causing the spool to move to the right, and the opening of the fuel outlet of the differential pressure regulating valve 1 will decrease, thereby reducing the fuel flow to the fuel nozzle , to achieve the effect of reducing the oil supply.

Similarly, when the altitude drops, in order to prevent the gas turbine from leaning out and stalling, the amount of fuel required for starting increases. At this time, the ambient atmospheric pressure increases, and the pressure difference between the upper end and the lower end of the adjustment rod 24 increases, so that the adjustment rod 24 Rotate counterclockwise, and then the thrust of the adjusting rod 24 on the spool connecting rod of the differential pressure regulating valve 1 will increase, so that the valve core will move to the left, and the opening of the fuel outlet of the differential pressure regulating valve 1 will increase, thereby leading to the The fuel flow of the nozzle is increased to achieve the effect of increasing the fuel supply.

The gas turbine self-regulating oil supply device provided by the utility model can automatically adjust the fuel supply to the gas turbine according to the ambient atmospheric pressure and the pressure change after the compressor, which is of great significance to the gas turbine fuel system, and at the same time improves the fuel supply law in the gas turbine control system. Suitability at different altitudes.

The fuel flows through the pressure difference regulating valve 1 and then flows to the fuel shut-off valve 3. The fuel shut-off valve 3 is a two-way fuel shut-off valve, which is a normally closed valve. When it is energized, the valve opens and the fuel can flow into the downstream fuel nozzle. De-energizing the fuel shut-off valve 3 will cause the gas turbine to shut down normally.

In addition, it should be noted that the specific embodiments described in this specification may be different in parts, shapes and names of components. All equivalent or simple changes made according to the structure, features and principles described in the utility model patent concept are included in the protection scope of the utility model patent. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the definition defined in the claims scope, all should belong to the protection scope of the present utility model.

Claims (10)

1. The fueller 1. a kind of gas turbine is self-regulated, including pressure-difference valve, rotating speed and altimetric compensation device, which is characterized in that

   -- the pressure-difference valve includes valve body and spool, and the spool can horizontally slip in the inner cavity of valve body, wherein

   The left end of the valve body is equipped with the oil-through-hole being connected to its inner cavity, and the oil-through-hole is described to introduce hydraulic fluid pressure The right end peripheral wall of valve body be equipped with fuel inlet, the fuel supply pipeline connection of the fuel inlet and upstream, the valve body Middle part is equipped with fuel outlet, the pipeline connection towards fuel nozzle of the fuel outlet and downstream；

   Spring is arranged in the left bottom of the spool, and valve core link rod is arranged in right hand top, and the valve core link rod stretches out the valve body Right end at the top of connect with the rotating speed and altimetric compensation device being arranged on the right side of outside the pressure-difference valve；

   -- the rotating speed and altimetric compensation device include diaphragm, resetting spring, waling stripe, the tune of shell and setting in the housing Pole, bellows, wherein

   The rotating speed and the inner cavity of the shell of altimetric compensation device include upper cavity, lower chamber and are connected to upper cavity and lower chamber It is connected to cavity, in the upper cavity, the bellows is arranged horizontally in the lower chamber diaphragm arrangement, the adjusting Bar is vertically hinged in the connection cavity；

   The upper cavity is divided into left part upper cavity and right part upper cavity by the diaphragm, and the resetting spring is arranged horizontally in institute It states in right part upper cavity, the back-moving spring top is against the right side of the diaphragm, and the right part upper cavity is equipped with venthole, The venthole introduces pressure after compressor；The left part upper cavity is connected to cavity and lower chamber connection with described, and described At least one of left part upper cavity, connection cavity, lower chamber are equipped with venthole, which introduces environment atmospheric pressure；

   The upper end for passing on left the waling stripe and the adjusting rod that are arranged in the left part upper cavity of the diaphragm Right side connects, and is connect with the valve core link rod of the pressure-difference valve on the left of the upper end of the adjusting rod, the lower end of the adjusting rod Right side is connect with the top of the bellows.
2. The fueller 2. gas turbine according to claim 1 is self-regulated, which is characterized in that born on the left of the spool Hydraulic fluid pressure and spring force, fuel pressure and the rotating speed are born in right side and altimetric compensation device pushes away the valve core link rod Power, the spool move left and right under left and right sides differential pressure action, to control the pressure-difference valve fuel outlet aperture, And then control the fuel flow towards the fuel nozzle in downstream.
3. The fueller 3. gas turbine according to claim 1 is self-regulated, which is characterized in that the upper end of the adjusting rod is right Pressure and spring force after compressor are born in side, and ripple pipe pressure is born in lower end, acts on the top and bottom of the adjusting rod Pressure difference can be such that the adjusting rod rotates, and thrust is generated to the valve core link rod of pressure-difference valve.
4. The fueller 4. gas turbine according to claim 1 is self-regulated, which is characterized in that described towards fuel nozzle Fuel cut-off valve is set on pipeline.
5. The fueller 5. gas turbine according to claim 4 is self-regulated, which is characterized in that the fuel cut-off valve is two Road formula fuel cut-off valve is a normally close valve, and when the fuel cut-off valve is powered, valve is opened, and fuel oil is able to flow into downstream Fuel nozzle, if to the fuel cut-off valve power-off can lead to gas turbine orderly shutdown.
6. The fueller 6. gas turbine according to claim 1 is self-regulated, which is characterized in that when the spool is in left side When extreme position, the fuel outlet is opened completely, and when the spool is in right limit position, the fuel outlet is complete Close, the spool by left side extreme position to the right extreme position move when, the aperture of the fuel outlet is gradually reduced, instead It, when the spool is moved by right limit position extreme position to the left, the aperture of the fuel outlet gradually increases.
7. The fueller 7. gas turbine according to claim 1 is self-regulated, which is characterized in that in certain height above sea level, combustion Gas-turbine starts in accelerator, and compressor delivery pressure is stepped up therewith, acts on the pressure on the right side of the adjusting rod upper end Power can be stepped up, and the pressure difference for acting on the top and bottom of the adjusting rod is stepped up, this pressure difference meeting being stepped up So that the adjusting rod rotates counterclockwise, and then the adjusting rod can increase the thrust of the valve core link rod of the pressure-difference valve Greatly so that spool moves to the left, and the fuel outlet aperture of the pressure-difference valve increases, and then leads to the fuel nozzle in downstream Fuel flow increase.
8. The fueller 8. gas turbine according to claim 1 is self-regulated, which is characterized in that in certain height above sea level, when Gas turbine rotary speed declines, and the top and bottom pressure difference for acting on the adjusting rod gradually declines so that the adjusting rod up time Needle rotates, and then the spool of the pressure-difference valve moves to the right, and fuel outlet aperture reduces.
9. The fueller 9. gas turbine according to claim 1 is self-regulated, which is characterized in that with the increasing of height above sea level Greatly, the pressure difference for acting on the top and bottom of the adjusting rod declines so that the adjusting rod rotates clockwise, and then the tune Pole can reduce the thrust of the valve core link rod of the pressure-difference valve so that spool moves to the right, the pressure-difference valve Fuel outlet aperture reduce, and then towards fuel nozzle fuel flow reduce.
10. The fueller 10. gas turbine according to claim 1 is self-regulated, which is characterized in that as height above sea level declines, The top and bottom pressure difference for acting on the adjusting rod increases so that the adjusting rod rotates counterclockwise, and then the adjusting rod The thrust of the valve core link rod of the pressure-difference valve will increase so that spool moves to the left, the combustion of the pressure-difference valve Oil export aperture increases, and then increases towards the fuel flow of fuel nozzle.