Small-driving-force fuel regulating valve for gas turbine

Abstract

The small-driving-force fuel regulating valve comprises a valve body, a valve element and an upper end cover, the valve element and the upper end cover are both installed in the valve body, one end of the valve element is located in the valve body, the other end of the valve element penetrates through the upper end cover and is exposed to the outer side, a valve element shaft shoulder is arranged in the middle of the valve element, and a cavity is formed between the valve element shaft shoulder and the upper end cover; a communicating channel is arranged in the valve element, one end of the communicating channel communicates with one end of the valve element, and the other end of the communicating channel communicates with the cavity. Fuel gas in the valve body can enter a cavity formed by a shaft shoulder in the middle of the valve element and the upper end cover under the action of pressure, the stress area of the shaft shoulder of the valve element is slightly larger than that of the head of the valve element, the pressure of the fuel gas on the two sides of the valve element is basically balanced, the acting force of the fuel gas on the valve element is reduced, and it is guaranteed that the valve element has the automatic closing capacity when external driving fails; the influence of gas pressure on the valve element is reduced, and the driving force needed for driving the valve element to move is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of fuel regulating valves, and in particular to a small driving force fuel regulating valve for a gas turbine. Background Art

[0002] The stability and accuracy of the gas fuel flow regulation by the gas fuel regulating valve are important factors that determine whether the gas turbine can ignite and operate normally.

[0003] Traditional fuel regulating valves for gas turbines rely on the vertical lifting (generally called lifting valves) or rotation (generally called rotary valves) of the valve core to control the valve opening. It is not easy to accurately control the flow area of ​​the valve for lifting valves, so lifting valves are often used to switch pipelines instead of flow regulation; in addition, the gas in the gas regulating valve has a certain pressure (generally 0.3-5Mpa), so the valve core will be affected by the gas pressure during the lifting process, which will cause a significant increase in the driving force required to drive the valve core movement, thereby increasing the power and volume required for the driving mechanism, and the larger driving force will also aggravate the wear or aging of the moving parts in the fuel regulating valve. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a small driving force fuel regulating valve for a gas turbine in view of the deficiencies of the prior art.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A small driving force fuel regulating valve for a gas turbine comprises: a valve body, a valve core, and an upper end cover, wherein the valve core and the upper end cover are both installed in the valve body, one end of the valve core is located in the valve body, and the other end of the valve core passes through the upper end cover and is exposed to the outside, a valve core shaft shoulder is provided in the middle of the valve core, a cavity is provided between the valve core shaft shoulder and the upper end cover, a connecting passage is provided inside the valve core, one end of the connecting passage is connected to one end of the valve core, and the other end of the connecting passage is connected to the cavity.

[0006] The beneficial effects of the technical solution of the present invention are as follows: the valve body is used to bear and support the valve core and the fuel gas, and the gas in the valve body can enter the cavity formed by the middle shaft shoulder of the valve core and the upper end cover under the action of pressure. Because the force area at the valve core shaft shoulder is slightly larger than the valve core head, the gas pressure on both sides of the valve core is basically balanced, which not only reduces the force of the gas on the valve core, but also ensures that the valve core has the ability to automatically close when the external drive fails, balances the gas pressure on the head and shaft shoulder of the valve core, reduces the influence of the gas pressure on the valve core, and reduces the driving force required to drive the valve core to move.

[0007] Furthermore, a step hole is provided inside the valve body, a valve seat is provided in the step hole, the valve seat and the step hole are fitted in an interference fit, one end of the valve core is installed in the valve seat, and the other end of the valve core is provided with a thread for connecting to a driving mechanism.

[0008] The beneficial effect of adopting the above further technical solution is that one end of the valve core can form a mechanical seal with the air inlet valve port, i.e., the valve seat. The end of the valve core can be fixedly connected to the driving mechanism through a thread, and drive the valve core to move linearly in the vertical direction. When the valve core moves between the valve seat and the upper end cover, a certain opening is formed between the head of the valve core and the valve seat, and the movement of the valve core is basically in a linear relationship with the opening of the valve port.

[0009] Furthermore, one end of the valve core is a hemispherical structure.

[0010] The beneficial effect of adopting the above further technical solution is that the head of the valve core has a certain shape, so that the movement of the valve core and the opening of the valve port are basically in a linear relationship, and the head of the valve core cooperates with the valve seat to realize the control of the flow area. By adjusting the position of the valve core, the flow area can be changed, thereby realizing accurate regulation of the gas flow of the gas turbine.

[0011] Furthermore, a valve core shaft shoulder sealing groove is provided on the valve core shaft shoulder, a valve core seal is provided in the valve core shaft shoulder sealing groove, and the valve core seal is located between the valve body and the valve core shaft shoulder; an upper end cover sealing groove is provided on the upper end cover, an upper end cover seal is provided in the upper end cover sealing groove, and the upper end cover seal is located between the valve body and the upper end cover; the upper end cover is connected to the valve body by bolts.

[0012] The beneficial effects of adopting the above further technical solution are: the valve core seal is used to achieve sealing between the valve core shaft shoulder and the upper end cover. The upper end seal is used to achieve sealing between the valve body and the upper end cover. The upper end cover is connected to the valve body by bolts, which is convenient for installation and maintenance of the upper end cover.

[0013] Furthermore, the valve core seal and the upper end cover seal are made of silicone rubber.

[0014] The beneficial effects of adopting the above further technical solution are: improving sealing performance and reducing costs.

[0015] Furthermore, an air filter is installed at one end of the communication passage through an air filter nut.

[0016] The beneficial effect of adopting the above further technical solution is that the air filter is used to filter impurities in the pipeline to prevent pollutants from entering the cavity formed by the middle shaft shoulder of the valve core and the upper end cover. The air filter nut is fixedly connected to the valve core by threading to compress the air filter.

[0017] Furthermore, a center hole is provided in the middle of the upper end cover, a copper bushing and a sealing sleeve are provided in the center hole, and the valve core is installed in the copper bushing and the sealing sleeve.

[0018] The beneficial effect of adopting the above further technical solution is that the sealing sleeve is used to prevent external gas or impurities from entering the fuel regulating valve, and at the same time prevent the fuel gas inside the fuel regulating valve from directly entering the atmosphere. The copper bushing is pressed into the center hole of the upper end cover, with an interference fit, and plays a supporting and guiding role for the valve core stem. The valve core stem passes through the sealing sleeve and the copper bushing to support and guide the valve core stem.

[0019] Furthermore, the copper bushing, sealing sleeve, upper end cover and valve core are coaxially arranged.

[0020] The beneficial effect of adopting the above further technical solution is: facilitating the movement of the valve core and preventing it from getting stuck.

[0021] Furthermore, a sealing sleeve sealing groove is provided on the sealing sleeve, a first sealing sleeve seal and a second sealing sleeve seal are provided in the sealing sleeve sealing groove, the sealing sleeve is installed in the center hole through a clamping nut, the copper bushing and the upper end cover are fitted in an interference fit, and the valve core and the copper bushing are fitted in a clearance fit.

[0022] The beneficial effect of adopting the above further technical solution is that the sealing sleeve is used to prevent external gas or impurities from entering the interior of the fuel regulating valve, and at the same time prevent the fuel gas inside the fuel regulating valve from directly entering the atmosphere. The compression nut is fixedly connected to the upper end cover by threading, and is used to compress the sealing sleeve. The valve core rod passes through the sealing sleeve and the copper bushing, which is used to support and guide the valve core valve stem. The sealing groove has a first sealing sleeve seal and a second sealing sleeve seal to achieve sealing between the valve core and the upper end cover.

[0023] Furthermore, the other end of the valve core is a rod structure.

[0024] The beneficial effect of adopting the above further technical solution is that the valve core stem passes through the sealing sleeve and the copper bushing to support and guide the valve core stem.

[0025] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic structural diagram of a low-driving-force fuel regulating valve for a gas turbine provided in an embodiment of the present invention.

[0027] Figure 2 A schematic structural diagram of a valve core provided in an embodiment of the present invention.

[0028] Explanation of the accompanying drawings: 1. Valve body; 2. Valve core; 3. Valve core seal; 4. Valve seat; 5. Upper end cover; 6. Upper end cover seal; 7. Copper bushing; 8. Sealing sleeve; 9. First sealing sleeve seal; 10. Second sealing sleeve seal; 11. Pressing nut; 12. Air filter; 13. Air filter nut; 14. Connecting passage. DETAILED DESCRIPTION

[0029] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention but not to limit the scope of the present invention.

[0030] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a small driving force fuel regulating valve for a gas turbine, comprising: a valve body 1, a valve core 2, and an upper end cover 5, wherein the valve core 2 and the upper end cover 5 are both installed in the valve body 1, one end of the valve core 2 is located in the valve body 1, and the other end of the valve core 2 passes through the upper end cover 5 and is exposed to the outside, a valve core shoulder is provided in the middle of the valve core 2, a cavity is provided between the valve core shoulder and the upper end cover 5, a connecting passage 14 is provided inside the valve core 2, one end of the connecting passage 14 is connected to one end of the valve core 2, and the other end of the connecting passage 14 is connected to the cavity.

[0031] The beneficial effects of the technical solution of the present invention are as follows: the valve body is used to bear and support the valve core and the fuel gas, and the gas in the valve body can enter the cavity formed by the middle shaft shoulder of the valve core and the upper end cover under the action of pressure. Because the force area at the valve core shaft shoulder is slightly larger than the valve core head, the gas pressure on both sides of the valve core is basically balanced, which not only reduces the force of the gas on the valve core, but also ensures that the valve core has the ability to automatically close when the external drive fails, balances the gas pressure on the head and shaft shoulder of the valve core, reduces the influence of the gas pressure on the valve core, and reduces the driving force required to drive the valve core to move.

[0032] An embodiment of the present invention provides a small-driving-force fuel regulating valve for a gas turbine, wherein the valve body is used to bear and support the valve core, valve seat and fuel gas; the head of the valve core (one end of the valve core) and the intake valve port, i.e., the valve seat 4, can form a mechanical seal, and the end of the valve stem (the other end of the valve core) can be fixedly connected to the drive mechanism by a thread, and drive the valve core to move (linear motion in the vertical direction); the air filter is used to filter impurities in the pipeline to prevent pollutants from entering the cavity formed by the middle shaft shoulder of the valve core (valve core shaft shoulder) and the upper end cover 5; the sealing sleeve 8 is used to prevent external gas or impurities from entering the interior of the fuel regulating valve, and at the same time prevent the fuel gas inside the fuel regulating valve from directly entering the atmosphere.

[0033] The head of the valve core (one end of the valve core) has a certain shape, and a sealing groove (valve core shoulder sealing groove) is provided at the valve core shoulder, a valve core sealing ring (valve core sealing 3) is installed in the sealing groove, a through hole (connecting passage) is opened in the middle of the valve core, and a thread is provided at the tail of the valve stem (the other end of the valve core), which can be fixedly connected to the driving mechanism; the upper end cover is provided with a sealing groove (upper end cover sealing groove), an upper end cover sealing ring (upper end cover sealing 6) is installed in the sealing groove, and the upper end cover is fixedly connected to the valve body by bolts; the head of the valve core is provided with a head cavity, the air filter is installed in the head cavity of the valve core, and is locked by an air filter nut; a center hole is provided in the upper end cover, and the copper bushing is pressed into the center hole of the upper end cover.

[0034] The sealing sleeve is provided with sealing grooves (sealing sleeve sealing grooves) on the inner and outer sides, and the first sealing sleeve seal and the second sealing sleeve seal are arranged in the sealing grooves. The sealing sleeve is installed at the center hole of the upper end cover and is locked with a locking nut (compression nut 11); the valve stem and the copper bushing are clearance-matched, and the valve stem end (the other end of the valve core) and the driving mechanism can be fixedly connected by threads to achieve support and transmission;

[0035] The copper bushing, sealing sleeve, upper end cover, valve seat and valve core are coaxial.

[0036] like Figure 1 and Figure 2 As shown, further, a step hole is provided inside the valve body 1, a valve seat 4 is provided in the step hole, the valve seat 4 and the step hole are fitted in an interference fit, one end of the valve core 2 is installed in the valve seat 4, and the other end of the valve core 2 is provided with a thread for connecting to a driving mechanism.

[0037] The beneficial effect of adopting the above further technical solution is that one end of the valve core can form a mechanical seal with the air inlet valve port, i.e., the valve seat. The end of the valve core can be fixedly connected to the driving mechanism through a thread, and drive the valve core to move linearly in the vertical direction. When the valve core moves between the valve seat and the upper end cover, a certain opening is formed between the head of the valve core and the valve seat, and the movement of the valve core is basically in a linear relationship with the opening of the valve port.

[0038] like Figure 1 and Figure 2 As shown, further, one end of the valve core 2 is a hemispherical structure.

[0039] The beneficial effect of adopting the above further technical solution is that the head of the valve core has a certain shape, so that the movement of the valve core and the opening of the valve port are basically in a linear relationship, and the head of the valve core cooperates with the valve seat to realize the control of the flow area. By adjusting the position of the valve core, the flow area can be changed, thereby realizing accurate regulation of the gas flow of the gas turbine.

[0040] like Figure 1 and Figure 2As shown, further, a valve core shaft shoulder is provided with a valve core shaft shoulder sealing groove, a valve core seal 3 is provided in the valve core shaft shoulder sealing groove, and the valve core seal 3 is located between the valve body 1 and the valve core shaft shoulder; an upper end cover sealing groove is provided on the upper end cover 5, an upper end cover seal 6 is provided in the upper end cover sealing groove, and the upper end cover seal 6 is located between the valve body 1 and the upper end cover 5; the upper end cover 5 is connected to the valve body 1 by bolts.

[0041] The beneficial effects of adopting the above further technical solution are: the valve core seal is used to achieve sealing between the valve core shaft shoulder and the upper end cover. The upper end seal is used to achieve sealing between the valve body and the upper end cover. The upper end cover is connected to the valve body by bolts, which is convenient for installation and maintenance of the upper end cover.

[0042] like Figure 1 and Figure 2 As shown, further, the valve core seal 3 and the upper end cover seal 6 are made of silicone rubber.

[0043] The beneficial effects of adopting the above further technical solution are: improving sealing performance and reducing costs.

[0044] like Figure 1 and Figure 2 As shown, further, an air filter 12 is installed at one end of the communication passage 14 through an air filter nut 13.

[0045] The beneficial effect of adopting the above further technical solution is that the air filter is used to filter impurities in the pipeline to prevent pollutants from entering the cavity formed by the middle shaft shoulder of the valve core and the upper end cover. The air filter nut is fixedly connected to the valve core by threading to compress the air filter.

[0046] like Figure 1 and Figure 2 As shown, further, a center hole is provided in the middle of the upper end cover 5 , a copper bushing 7 and a sealing sleeve 8 are provided in the center hole, and the valve core 2 is installed in the copper bushing 7 and the sealing sleeve 8 .

[0047] The beneficial effect of adopting the above further technical solution is that the sealing sleeve is used to prevent external gas or impurities from entering the fuel regulating valve, and at the same time prevent the fuel gas inside the fuel regulating valve from directly entering the atmosphere. The copper bushing is pressed into the center hole of the upper end cover, with an interference fit, and plays a supporting and guiding role for the valve core stem. The valve core stem passes through the sealing sleeve and the copper bushing to support and guide the valve core stem.

[0048] like Figure 1 and Figure 2 As shown, further, the copper bushing 7, the sealing sleeve 8, the upper end cover 5 and the valve core 2 are coaxially arranged.

[0049] The beneficial effect of adopting the above further technical solution is: facilitating the movement of the valve core and preventing it from getting stuck.

[0050] like Figure 1 and Figure 2 As shown, further, a sealing sleeve sealing groove is provided on the sealing sleeve 8, a first sealing sleeve seal 9 and a second sealing sleeve seal 10 are provided in the sealing sleeve sealing groove, the sealing sleeve 8 is installed in the center hole through a clamping nut 11, the copper bushing 7 and the upper end cover 5 are matched in an interference fit, and the valve core 2 and the copper bushing 7 are matched in a clearance fit.

[0051] The beneficial effect of adopting the above further technical solution is that the sealing sleeve is used to prevent external gas or impurities from entering the interior of the fuel regulating valve, and at the same time prevent the fuel gas inside the fuel regulating valve from directly entering the atmosphere. The compression nut is fixedly connected to the upper end cover by threading, and is used to compress the sealing sleeve. The valve core rod passes through the sealing sleeve and the copper bushing, which is used to support and guide the valve core valve stem. The sealing groove has a first sealing sleeve seal and a second sealing sleeve seal to achieve sealing between the valve core and the upper end cover.

[0052] like Figure 1 and Figure 2 As shown, further, the other end of the valve core 2 is a rod structure.

[0053] The beneficial effect of adopting the above further technical solution is that the valve core stem passes through the sealing sleeve and the copper bushing to support and guide the valve core stem.

[0054] The two ends of the valve body are respectively provided with a fuel inlet and outlet, and the top of the middle cavity is fixedly connected with the upper end cover by bolts.

[0055] The head of the valve core has a certain shape, so that the movement of the valve core and the opening of the valve port are basically in a linear relationship, and the head of the valve core cooperates with the valve seat to realize the control of the flow area; the other end of the valve core is a rod type, and there is a through hole in the center of the valve core. An air filter is installed at the air inlet (one end of the connecting passage and one end of the valve core), and the gas in the valve body can enter the cavity formed by the middle shaft shoulder of the valve core and the upper end cover through the air filter, balancing the gas pressure on the head and shoulder of the valve core, reducing the influence of the gas pressure on the valve core, and greatly reducing the driving force required to drive the valve core to move.

[0056] A sealing groove is arranged at the shaft shoulder in the middle of the valve core, and a valve core sealing member is arranged in the groove.

[0057] The tail of the valve core and valve stem is provided with a thread, which can be fixedly connected with a driving mechanism (motor).

[0058] The valve seat is pressed into the step hole at the bottom of the middle cavity of the valve body by interference fit.

[0059] The valve seat and the valve core head cooperate to form a mechanical seal.

[0060] When the valve core moves between the valve seat and the upper end cover, a certain opening is formed between the valve core head and the valve seat, and the movement of the valve core and the opening of the valve port are substantially in a linear relationship.

[0061] The upper end cover is fixedly connected to the valve body via threads.

[0062] The upper end cover is provided with a sealing groove, and an upper end cover sealing member is arranged in the groove.

[0063] The copper bushing is pressed into the center hole of the upper end cover by interference fit.

[0064] The sealing sleeve is provided with sealing grooves on the outside and inside, and the first sealing sleeve seal and the second sealing sleeve seal are arranged in the grooves.

[0065] The sealing sleeve is installed in the middle cavity (center hole) of the upper end cover.

[0066] The compression nut is fixedly connected to the upper end cover by means of threads and compresses the sealing sleeve.

[0067] The valve core stem passes through the sealing sleeve and the copper bushing, which supports and guides the valve core stem.

[0068] The air filter is installed in the valve core head cavity.

[0069] The gas filter filters the combustion gas which enters the cavity formed by the middle shaft shoulder of the valve core and the upper end cover from the valve body.

[0070] The air filter nut is fixedly connected to the valve core by means of threads and presses the air filter.

[0071] The sealing elements are made of silicone rubber and composite materials respectively.

[0072] The upper end cover is fixedly connected to the valve body by bolts, and the seal is achieved through the upper end cover seal; the copper bushing is pressed into the center hole of the upper end cover, the valve core and valve stem are fixedly connected to the drive device through threads, and the valve core and valve stem are matched with the copper bushing to achieve positioning and transmission; the valve core head and valve seat are matched to control the flow area. The sealing sleeve is locked by the compression nut, and the sealing sleeve, valve stem and seal are sealed; the two sides of the valve body are connected to the gas pipeline respectively.

[0073] The low-driving-force fuel regulating valve for a gas turbine provided in an embodiment of the present invention comprises a valve body 1, a valve core 2, a valve core seal 3, a valve seat 4, an upper end cover 5, an upper end cover seal 6, a copper bushing 7, a sealing sleeve 8, a first sealing sleeve seal 9, a second sealing sleeve seal 10, a clamping nut 11, an air filter 12 and an air filter nut 13.

[0074] The valve body 1 bears and serves as a mounting base for various internal parts; the valve body 1 is connected to the upper end cover 5 by bolts, a sealing groove is provided between the upper end cover 5 and the valve body 1, and an upper end seal 6 is provided in the sealing groove to achieve sealing between the valve body 1 and the upper end cover 5; the copper bushing 7 is pressed into the center hole of the upper end cover 5 with interference fit, which supports and guides the valve core rod; a sealing groove is provided between the sealing sleeve 8 and the center hole of the upper end cover 5, and a first sealing sleeve seal 9 and a second sealing sleeve seal 10 are provided in the sealing groove to achieve sealing between the valve core 2 and the upper end cover 5; the valve seat 4 is pressed into the step hole at the bottom of the middle cavity of the valve body 1 by interference fit; the air filter 12 is installed on the head of the valve core 2; the air filter nut 13 and the valve core 2 are fixedly connected by threads;

[0075] The valve core seal 3 and the upper end cover seal 6 are made of silicone rubber material; the first sealing sleeve seal 9 and the second sealing sleeve seal 10 are made of composite material.

[0076] The valve core 2 and the valve seat 4 are made of 06Cr19Ni10 and 9Cr18MovV stainless steel materials respectively.

[0077] The valve core 2 is movably arranged in the middle cavity of the valve body 1, and the valve core head has a certain shape, so that the movement of the valve core is basically in a linear relationship with the opening of the valve port. By adjusting the position of the valve core, the flow area can be changed, thereby achieving accurate adjustment of the gas flow of the gas turbine.

[0078] The gas in the valve body 1 can enter the cavity formed by the middle shaft shoulder of the valve core and the upper end cover 5 through the valve core head gas filter 12 under the action of pressure. Since the force area at the valve core shaft shoulder is slightly larger than the valve core head, the gas pressure on both sides of the valve core is basically balanced, which not only reduces the force of the gas pressure on the valve core, but also ensures that the valve core has the ability to automatically close when the external drive fails, reduces the influence of the gas pressure on the operating valve core, and thus greatly reduces the driving force required for the valve core to move (in this embodiment, the valve core driving force can be reduced to less than 10% of the driving force of the traditional structure fuel regulating valve).

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A low-driving-force fuel regulating valve for a gas turbine, characterized in that: include: A valve body, a valve core, and an upper end cover, wherein the valve core and the upper end cover are both installed in the valve body, one end of the valve core is located in the valve body, the other end of the valve core passes through the upper end cover and is exposed to the outside, a valve core shaft shoulder is provided in the middle of the valve core, a cavity is provided between the valve core shaft shoulder and the upper end cover, a connecting passage is provided inside the valve core, one end of the connecting passage is connected to one end of the valve core, and the other end of the connecting passage is connected to the cavity.

2. A low-driving-force fuel regulating valve for a gas turbine according to claim 1, characterized in that: A step hole is provided inside the valve body, a valve seat is provided in the step hole, the valve seat and the step hole are fitted in an interference fit, one end of the valve core is installed in the valve seat, and the other end of the valve core is provided with a thread for connecting to a driving mechanism.

3. A low-driving-force fuel regulating valve for a gas turbine according to claim 1, characterized in that: One end of the valve core is a hemispherical structure.

4. A low-driving-force fuel regulating valve for a gas turbine according to claim 1, characterized in that: A valve core shoulder sealing groove is provided on the valve core shoulder, a valve core seal is provided in the valve core shoulder sealing groove, and the valve core seal is located between the valve body and the valve core shoulder; an upper end cover sealing groove is provided on the upper end cover, an upper end cover seal is provided in the upper end cover sealing groove, and the upper end cover seal is located between the valve body and the upper end cover; the upper end cover is connected to the valve body by bolts.

5. A low-driving-force fuel regulating valve for a gas turbine according to claim 4, characterized in that: The valve core seal and the upper end cover seal are made of silicone rubber.

6. A low-driving-force fuel regulating valve for a gas turbine according to claim 1, characterized in that: An air filter is installed at one end of the communication passage through an air filter nut.

7. A low-driving-force fuel regulating valve for a gas turbine according to claim 1, characterized in that: A central hole is provided in the middle of the upper end cover, a copper bushing and a sealing sleeve are provided in the central hole, and the valve core is installed in the copper bushing and the sealing sleeve.

8. A low-driving-force fuel regulating valve for a gas turbine according to claim 7, characterized in that: The copper bushing, the sealing sleeve, the upper end cover and the valve core are coaxially arranged.

9. A low-driving-force fuel regulating valve for a gas turbine according to claim 7, characterized in that: The sealing sleeve is provided with a sealing sleeve sealing groove, and the sealing sleeve sealing groove is provided with a first sealing sleeve seal and a second sealing sleeve seal. The sealing sleeve is installed in the center hole through a clamping nut, and the copper bushing is fitted with the upper end cover in an interference fit, and the valve core and the copper bushing are fitted in a clearance fit.

10. A low-driving-force fuel regulating valve for a gas turbine according to claim 1, characterized in that: The other end of the valve core is a rod structure.

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