Angle adjusting system for gas inlet guide vane of gas turbine and gas turbine with angle adjusting system
By combining a piston-connecting rod actuator and an angular displacement detector with an oil supply monitoring device, the angle of the intake guide vane is directly monitored and controlled in a closed loop. This solves the accuracy and stability problems of existing gas turbine intake guide vane adjustment mechanisms, and achieves efficient and low-cost intake flow regulation and surge prevention.
Patent Information
- Application Number
- CN202520663064.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-04-09
AI Technical Summary
Existing gas turbine inlet guide vane adjustment mechanisms suffer from poor adjustment angle accuracy, poor stability, complex system composition, high operating costs, poor integration, and are inconvenient to install and maintain.
It adopts a piston-connecting rod actuator, angular displacement detector and integrated oil supply monitoring device to directly monitor the angle of the intake guide vane and control it through closed loop. It uses the auxiliary lubricating oil system of the gas turbine generator set as the pressure oil source and features a modular integrated design that can be detachably connected to the gas turbine base.
It achieves high-precision and fast-response intake guide vane angle adjustment, reduces system complexity and operating costs, improves integration, facilitates installation and maintenance, and avoids surge phenomenon.
Smart Images
Figure CN223894266U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to gas turbine technical field, especially, relate to a kind of angle adjusting system for gas turbine inlet guide vane.In addition, the utility model also relates to a kind of gas turbine comprising the angle adjusting system for above-mentioned gas turbine inlet guide vane. BACKGROUND
[0002] During the operation of gas turbine, the demand of combustion air intake will change with the change of gas turbine speed, intake parameter, etc., and at a certain speed, the strong vibration of compressor blade caused by airflow separation and backflow can cause compressor surge phenomenon, which further harms the gas turbine.This requires the gas turbine to be equipped with an inlet guide vane angle adjusting system with high adjustment accuracy, fast response speed and good safety performance, which adjusts the angle of inlet guide vane to adjust the intake flow and avoids the occurrence of compressor surge during operation.
[0003] At present, the angle adjusting mechanism of gas turbine inlet guide vane is mainly divided into full-electric type and electro-hydraulic driving type.Full-electric type mainly uses driving motor as power to control the extension and rotation of connecting rod mechanism to adjust the angle of inlet guide vane, and the system principle and composition are simple, mainly composed of driving motor, telescopic pull rod, transmission connecting arm, transmission pull rod, driven rocker arm, etc., and usually directly installed on the gas turbine body.Electro-hydraulic driving type uses electro-hydraulic servo valve to control the pressure oil amount entering the piston mechanism, drives the piston rod to do axial displacement through pressure oil, and drives the gas turbine inlet guide vane to rotate to change its angle through transmission mechanism, and the system principle and composition are relatively complex, and usually need to configure a set of pressure oil system as power source.
[0004] The existing full-electric type and electro-hydraulic driving type have the following disadvantages:
[0005] 1) The existing full-electric type inlet guide vane adjusting mechanism has long response time, poor adjustment angle and precision, poor stability, low safety, complex mechanical connecting rod structure and high cost.
[0006] 2) The existing electro-hydraulic driving type inlet guide vane adjusting mechanism has poor adjustment angle precision, poor stability, low safety, complex system composition, uses special pressure oil as power source, not only has complex system composition, but also has high operation cost, the inlet guide vane adjusting mechanism is scattered in arrangement, has poor integration, is inconvenient to install, disassemble and maintain, and the inlet guide vane adjusting mechanism mostly uses position sensor to detect the axial displacement of piston assembly to indirectly control the angle of inlet guide vane, which cannot directly read the current angle of inlet guide vane. UTILITY MODEL CONTENTS
[0007] This utility model provides an angle adjustment system for gas turbine inlet guide vanes and a gas turbine having the same, to solve the technical problems of existing all-electric inlet guide vane adjustment mechanisms and existing electro-hydraulic driven inlet guide vane adjustment mechanisms, such as poor adjustment angle accuracy, poor stability, complex system composition, high operating cost, scattered arrangement of inlet guide vane adjustment mechanisms, poor integration, and inconvenience in installation, disassembly and maintenance.
[0008] The technical solution adopted in this utility model is as follows:
[0009] An angle adjustment system for gas turbine inlet guide vanes includes: a piston-link actuator, an angular displacement detector, and an integrated oil supply monitoring device. The piston-link actuator and the angular displacement detector are respectively connected to the gas turbine body, and the piston-link actuator is connected to the gas turbine inlet guide vanes via a linkage mechanism. The angular displacement detector is connected to the gas turbine control system for real-time detection of the inlet guide vane angle. The oil supply monitoring device is detachably connected to the gas turbine base. The oil inlet of the oil supply monitoring device is connected to the gas turbine auxiliary lubrication system, and its oil outlet is connected to the piston-link actuator. The oil supply monitoring device is also connected to the control system to adjust the amount of hydraulic oil entering the piston-link actuator, thereby indirectly adjusting the inlet guide vane angle, and to monitor and warn of blockages and pressure abnormalities in the gas turbine inlet guide vane angle adjustment system.
[0010] Furthermore, the oil supply monitoring device includes a main pump oil supply circuit, a main oil supply pipe, an electro-hydraulic servo valve, and a return oil pipe; the main pump oil supply circuit is connected to the control system, the oil inlet end of the main pump oil supply circuit is connected to the main oil supply pipe of the auxiliary machine lubricating oil system, and its oil outlet end is connected to the main oil supply pipe for pumping hydraulic oil from the auxiliary machine lubricating oil system into the main oil supply pipe, and the oil outlet end of the main oil supply pipe is connected to a piston-connecting rod actuator; the oil inlet end of the return oil pipe is connected to the piston-connecting rod actuator, and its oil outlet end is connected to the lubricating oil tank of the auxiliary machine lubricating oil system; the electro-hydraulic servo valve is connected to both the main oil supply pipe and the return oil pipe.
[0011] Furthermore, the main pump oil supply circuit includes a main pump oil pipe, and a first manual valve, a drive gear pump, and a first check valve connected sequentially in the main pump oil pipe; the oil inlet end of the main pump oil pipe is connected to the main oil supply pipe of the auxiliary machine lubricating oil system, and its oil outlet end is connected to the main oil supply pipe; the drive gear pump is connected to the control system.
[0012] Furthermore, the oil supply monitoring device also includes a backup pump oil supply circuit, which includes a backup pump oil pipe and a second manual valve, a backup gear pump, and a second check valve connected in sequence in the backup pump oil pipe; the oil inlet end of the backup pump oil pipe is connected to the main oil supply pipe of the auxiliary machine lubricating oil system, and its oil outlet end is connected to the main oil supply pipe; the backup gear pump is connected to the control system.
[0013] Furthermore, the oil supply device also includes an overflow circuit for preventing system overpressure. The overflow circuit includes: an overflow pipe connecting the oil outlets of the main pump oil supply line and the standby pump oil supply line, and an overflow valve installed in the overflow pipe; the outlet of the overflow pipe is connected to the oil tank of the auxiliary machine lubricating oil system; and the overflow valve is connected to the control system.
[0014] Furthermore, the oil supply monitoring device also includes a filter device and a differential pressure transmitter; the filter device is installed in the main oil supply line and is located upstream of the electro-hydraulic servo valve to filter the hydraulic oil; the differential pressure transmitter is connected to both the inlet and outlet sides of the filter device and is also connected to the control system to monitor and provide early warning of the operation of the filter device.
[0015] Furthermore, the oil supply monitoring device also includes a bladder-type accumulator connected to the main oil supply pipeline. The bladder-type accumulator is located at the inlet end of the electro-hydraulic servo valve and connected to the control system to store a certain capacity of hydraulic oil.
[0016] Furthermore, the oil supply monitoring device also includes a pressure transmitter connected to the main oil supply pipe. The pressure transmitter is connected to the control device to monitor the system pressure and provide an alarm when the system pressure is abnormal.
[0017] Furthermore, the fuel supply monitoring device also includes an integrated frame for connecting to the base of the gas turbine. The integrated frame is equipped with two first mounting platforms of equal height, a second mounting platform with a height greater than that of the first mounting platforms, and multi-layer integrated mounting plates arranged vertically in space. The two first mounting platforms are arranged laterally at intervals, with the active gear pump and the standby gear pump respectively mounted on the two first mounting platforms. The second mounting platform is connected between the two first mounting platforms, with an electro-hydraulic servo valve supported on the second mounting platform, a bladder accumulator supported on the electro-hydraulic servo valve, and a filter device connected below the second mounting platform. The pressure transmitter and the differential pressure transmitter are respectively mounted on the integrated mounting plates.
[0018] According to another aspect of the present invention, a gas turbine is also provided, having an angle adjustment system for gas turbine inlet guide vanes as described in any of the above.
[0019] This utility model has the following beneficial effects:
[0020] Compared to existing electro-hydraulic driven inlet guide vane adjustment mechanisms that indirectly control the inlet guide vane angle using a position sensor that detects the axial displacement of the piston assembly, this novel angle adjustment system directly monitors the inlet guide vane angle using an angular displacement detector and generates a feedback signal to the gas turbine control system. The control system achieves closed-loop control of the inlet guide vane angle based on the difference between the externally input angle signal and the feedback angle signal. This system boasts a short response time, high angle adjustment accuracy, and a simple system composition. Furthermore, this novel angle adjustment system directly utilizes the lubricating oil from the auxiliary lubricating oil system of the gas turbine generator set as the pressure oil source, eliminating the need for additional dedicated pressure oil, thus simplifying the system and reducing operating costs. The oil supply monitoring device in this novel angle adjustment system adopts a modular integrated design, with high internal integration and a detachable fixed connection to the gas turbine base, resulting in a small footprint. The integrated design makes installation, disassembly, and maintenance very convenient. In addition, this novel system has been manufactured, assembled, and tested, meeting the requirements for precise adjustment of gas turbine inlet flow and prevention of surge, and is already in use with good performance.
[0021] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description
[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:
[0023] Figure 1 This is a schematic diagram of the angle adjustment system for the gas turbine inlet guide vanes according to a preferred embodiment of the present invention;
[0024] Figure 2 yes Figure 1 A schematic diagram of the spatial structure of the oil supply monitoring device.
[0025] Legend:
[0026] 1. Piston-connecting rod type actuator;
[0027] 2. Angular displacement detector;
[0028] 3. Main pump oil supply circuit; 31. Main pump oil pipe; 32. First manual valve; 33. Drive gear pump; 34. First check valve;
[0029] 4. Main oil supply pipe; 5. Electro-hydraulic servo valve; 6. Return oil pipe; 7. Lubricating oil tank; 8. Main oil supply pipe;
[0030] 9. Backup pump oil supply circuit; 91. Backup pump oil pipe; 92. Second manual valve; 93. Backup gear pump; 94. Second check valve; 10. Overflow circuit; 101. Overflow pipe; 102. Overflow valve;
[0031] 11. Filtration device; 12. Differential pressure transmitter; 13. Bladder accumulator; 14. Pressure transmitter;
[0032] 15. Integrated rack; 151. First mounting platform; 153. Integrated mounting plate. Detailed Implementation
[0033] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.
[0034] Reference Figure 1 A preferred embodiment of this utility model provides an angle adjustment system for gas turbine inlet guide vanes, comprising: a piston-connecting rod actuator 1, an angular displacement detector 2, and an integrated oil supply monitoring device. The piston-connecting rod actuator 1 and the angular displacement detector 2 are respectively connected to the gas turbine body, and the piston-connecting rod actuator 1 is connected to the gas turbine inlet guide vanes via a connecting rod mechanism. The angular displacement detector 2 is connected to the gas turbine control system for real-time detection of the inlet guide vane angle. The oil supply monitoring device is detachably connected to the gas turbine base. Its inlet end is connected to the gas turbine's auxiliary lubrication system, and its outlet end is connected to the piston-connecting rod actuator 1. The oil supply monitoring device is also connected to the control system to adjust the amount of hydraulic oil entering the piston-connecting rod actuator 1, thereby indirectly adjusting the inlet guide vane angle, and to monitor and warn of blockages and pressure abnormalities in the gas turbine inlet guide vane angle adjustment system.
[0035] When the gas turbine inlet guide vane angle adjustment system of this utility model is working, according to the correspondence between the gas turbine speed and the inlet guide vane angle (this correspondence can be known in advance through experimental testing or according to existing technical data), when the gas turbine is running at a certain speed, a corresponding inlet guide vane angle is required to increase or decrease the gas turbine's intake volume, thereby adapting the speed to the intake volume. First, the inlet guide vane angle value corresponding to the speed is input to form a target angle value, or the gas turbine control system provides the inlet guide vane angle value corresponding to the speed to form a drive signal. At this time, the angular displacement detector 2 detects the angle value of the inlet guide vane in real time and feeds it back to the control system. The control system controls the oil supply monitoring device to operate according to the difference between the real-time angle value and the target angle value, thereby increasing or decreasing the amount of hydraulic oil entering the piston connecting rod actuator cylinder 1, thereby driving the inlet guide vane to rotate until the inlet guide vane angle fed back by the angular displacement detector 2 basically matches the target angle.
[0036] Compared to existing electro-hydraulic driven inlet guide vane adjustment mechanisms that indirectly control the inlet guide vane angle using a position sensor that detects the axial displacement of the piston assembly, this novel angle adjustment system directly monitors the inlet guide vane angle using an angular displacement detector 2 and generates a feedback signal to the gas turbine control system. The control system achieves closed-loop control of the inlet guide vane angle based on the difference between the externally input angle signal and the feedback angle signal. This system boasts a short response time, high angle adjustment accuracy, and a simple system composition. Furthermore, this novel angle adjustment system directly utilizes the lubricating oil from the auxiliary lubricating oil system of the gas turbine generator set as the pressure oil source, eliminating the need for additional dedicated pressure oil, thus simplifying the system and reducing operating costs. The oil supply monitoring device in this novel angle adjustment system adopts a modular integrated design, with high internal integration and a detachable fixed connection to the gas turbine base, resulting in a small footprint. The integrated design makes installation, disassembly, and maintenance very convenient. In addition, this novel system has been manufactured, assembled, and tested, meeting the requirements for precise adjustment of gas turbine inlet flow and prevention of surge, and is already in use with good performance.
[0037] Optionally, such as Figure 1 As shown, the oil supply monitoring device includes a main pump oil supply line 3, a main oil supply pipe 4, an electro-hydraulic servo valve 5, and a return oil pipe 6. The main pump oil supply line 3 is connected to the control system. Its inlet end is connected to the main oil supply pipe 8 of the auxiliary machine lubricating oil system, and its outlet end is connected to the main oil supply pipe 4 to pump hydraulic oil from the auxiliary machine lubricating oil system into the main oil supply pipe 4. The outlet end of the main oil supply pipe 4 is connected to a piston-connecting rod actuator 1. The inlet end of the return oil pipe 6 is connected to the piston-connecting rod actuator 1, and its outlet end is connected to the lubricating oil tank 7 of the auxiliary machine lubricating oil system. The electro-hydraulic servo valve 5 is connected to both the main oil supply pipe 4 and the return oil pipe 6. In this optional solution, the electro-hydraulic servo valve 5 is used to control the hydraulic oil entering the piston-linkage actuator 1, thereby driving the piston-linkage actuator 1 to perform corresponding actions. The electro-hydraulic servo valve 5 is an electro-hydraulic servo valve directly driven by a permanent magnet linear motor with a feedback device. It not only has a short response time and high control accuracy, but also can monitor the position of the electro-hydraulic servo valve 5 online, ensuring high operational safety.
[0038] In this optional solution, such as Figure 1As shown, the main pump oil supply circuit 3 includes a main pump oil pipe 31, and a first manual valve 32, a drive gear pump 33, and a first check valve 34 connected sequentially in the main pump oil pipe 31. The oil inlet end of the main pump oil pipe 31 is connected to the oil supply header 8 of the auxiliary machine lubricating oil system, and its oil outlet end is connected to the main oil supply pipe 4. The drive gear pump 33 is connected to the control system. In this optional scheme, the drive gear pump 33 is used to pressurize the low-pressure lubricating oil, increasing the force of the oil on the piston-connecting rod actuator 1; the first manual valve 32 is used to manually control the opening and closing of the main pump oil supply circuit 3 to improve the system's operational safety; the first check valve 34 is used to control the unidirectional flow of hydraulic oil to prevent it from flowing back into the auxiliary machine lubricating oil system, thereby causing safety problems.
[0039] Optionally, such as Figure 1 As shown, the oil supply monitoring device also includes a backup pump oil supply circuit 9, which includes a backup pump oil pipe 91, and a second manual valve 92, a backup gear pump 93, and a second check valve 94 connected sequentially to the backup pump oil pipe 91. The inlet end of the backup pump oil pipe 91 is connected to the main oil supply pipe 8 of the auxiliary machine lubrication system, and its outlet end is connected to the main oil supply pipe 4. The backup gear pump 93 is connected to the control system. In this optional scheme, both the main pump oil supply circuit 3 and the backup pump oil supply circuit 9 are provided. The backup pump oil supply circuit 9 is used in emergency situations such as when the main pump oil supply circuit 3 fails, thereby improving the safety of system operation. The second manual valve 92 is used to manually control the on / off state of the backup pump oil supply circuit 9 to improve the safety of system operation. The second check valve 94 is used to control the unidirectional flow of hydraulic oil to prevent it from flowing back into the auxiliary machine lubrication system, thereby causing safety problems.
[0040] Optionally, such as Figure 1 As shown, the oil supply device also includes an overflow circuit 10 for preventing system overpressure. The overflow circuit 10 includes an overflow pipe 101 connecting the oil outlets of the main pump oil supply line 3 and the standby pump oil supply line 9, and an overflow valve 102 installed in the overflow pipe 101. The outlet of the overflow pipe 101 is connected to the lubricating oil tank 7 of the auxiliary machine lubricating oil system. The overflow valve 102 is connected to the control system; during operation, a portion of the pressurized oil can be discharged through the overflow circuit 10 to relieve pressure, thereby preventing system overpressure.
[0041] Optionally, such as Figure 1As shown, the oil supply monitoring device also includes a filter device 11 and a differential pressure transmitter 12. The filter device 11 is installed in the main oil supply line 4 and is located upstream of the electro-hydraulic servo valve 5 to filter the hydraulic oil. The differential pressure transmitter 12 is connected to both the inlet and outlet sides of the filter device 11 and is also connected to the control system to monitor and provide early warning of the operation of the filter device 11. In this optional scheme, the filter device 11 is a dual filter, which is used to further filter and intercept impurities in the pressurized oil to ensure the safe operation of system components; the differential pressure transmitter 12 is used to monitor the differential pressure between the inlet and outlet of the dual filter and can provide a differential pressure alarm as an indicator for replacing and cleaning the filter element of the filter device 11. In this new system, a dual filter with a filtration accuracy of 5μm is configured after the main pump oil supply line 3 and the standby pump oil supply line 9, and a differential pressure transmitter 12 is also configured. This not only filters the hydraulic oil to protect the safe operation of downstream devices, but also monitors the differential pressure between the inlet and outlet of the filter device 11 online, realizing the online switching of the filter device 11.
[0042] Optionally, such as Figure 1 As shown, the oil supply monitoring device also includes a bladder-type accumulator 13 connected to the main oil supply pipe 4. The bladder-type accumulator 13 is located at the inlet end of the electro-hydraulic servo valve 5 and connected to the control system to store a certain capacity of hydraulic oil. In this optional scheme, the bladder-type accumulator 13 is a tank of a certain volume, capable of storing a certain capacity of pressurized oil. In the event of a power outage due to a unit failure, it can continue to ensure the angle adjustment of the intake guide vanes for a certain period of time, thereby ensuring the safe shutdown of the unit and improving the stability and safety of the unit's operation.
[0043] Optionally, such as Figure 1 As shown, the oil supply monitoring device also includes a pressure transmitter 14 connected to the main oil supply pipe 4. The pressure transmitter 14 is connected to the control device to monitor the system pressure and provide an alarm when the system pressure is abnormal. During operation, the pressure transmitter 14 monitors the system's pressurized oil pressure and can provide alarms for excessively high or low pressure, serving as an indicator of the system's normal operation.
[0044] Optionally, such as Figure 2As shown, the fuel supply monitoring device also includes an integrated frame 15 for connecting to the gas turbine base. The integrated frame 15 has two first mounting platforms 151 of equal height, a second mounting platform with a height greater than the first mounting platforms 151, and multi-layered integrated mounting plates 153 arranged vertically. The two first mounting platforms 151 are laterally spaced, with the active gear pump 33 and the standby gear pump 93 mounted on them respectively. The second mounting platform connects between the two first mounting platforms 151. The electro-hydraulic servo valve 5 is supported on the second mounting platform, the bladder accumulator is supported on the electro-hydraulic servo valve 5, and the filter device 11 is connected below the second mounting platform. The pressure transmitter 14 and the differential pressure transmitter 12 are respectively mounted on the integrated mounting plate 153. During operation, after the entire fuel supply monitoring device is assembled directly in the factory, it is bolted to the gas turbine base and connected to the piston-connecting rod actuator 1 and the auxiliary lubrication system via pipelines. In this optional solution, the arrangement of the components within the oil supply monitoring device makes its overall layout reasonable, compact, and highly integrated, thus facilitating installation, disassembly, and maintenance.
[0045] A preferred embodiment of this utility model also provides a gas turbine having an angle adjustment system for the gas turbine inlet guide vanes as described above. Therefore, the gas turbine of this utility model has a short working response time, high angle adjustment accuracy, simple system, low operating cost, high internal integration, small footprint, and is easy to install, disassemble and maintain.
[0046] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. An angle adjustment system for gas turbine inlet guide vanes, characterized in that, include: Piston-connecting rod actuator (1), angular displacement detector (2), and integrated oil supply monitoring device; The piston-connecting rod actuator (1) and the angular displacement detector (2) are respectively connected to the body of the gas turbine. The piston-connecting rod actuator (1) is connected to the gas turbine's inlet guide vane through a connecting rod mechanism. The angular displacement detector (2) is connected to the gas turbine's control system to detect the angle of the inlet guide vane in real time. The oil supply monitoring device is detachably connected to the base of the gas turbine. The oil inlet of the oil supply monitoring device is connected to the auxiliary lubricating oil system of the gas turbine, and its oil outlet is connected to the piston rod actuator (1). The oil supply monitoring device is also connected to the control system to adjust the amount of hydraulic oil entering the piston rod actuator (1) and thereby indirectly adjust the angle of the intake guide vane, and to monitor and warn of blockage and pressure abnormalities in the angle adjustment system of the gas turbine intake guide vane.
2. The angle adjustment system for gas turbine inlet guide vanes according to claim 1, characterized in that, The oil supply monitoring device includes the main pump oil supply line (3), the main oil supply pipe (4), the electro-hydraulic servo valve (5), and the return oil pipe (6); The main pump oil supply circuit (3) is connected to the control system. The oil inlet end of the main pump oil supply circuit (3) is connected to the oil supply header (8) of the auxiliary machine lubricating oil system, and its oil outlet end is connected to the oil supply main pipe (4) to pump the hydraulic oil of the auxiliary machine lubricating oil system into the oil supply main pipe (4). The oil outlet end of the oil supply main pipe (4) is connected to the piston connecting rod type actuator (1). The oil inlet end of the return oil pipe (6) is connected to the piston connecting rod type actuator (1), and its oil outlet end is connected to the lubricating oil tank (7) of the auxiliary machine lubricating oil system. The electro-hydraulic servo valve (5) is connected to both the oil supply main pipe (4) and the oil return pipe (6).
3. The angle adjustment system for gas turbine inlet guide vanes according to claim 2, characterized in that, The main pump oil supply circuit (3) includes the main pump oil pipe (31), and the first manual valve (32), the active gear pump (33) and the first check valve (34) connected in sequence in the main pump oil pipe (31); The oil inlet end of the main pump oil pipe (31) is connected to the oil supply header (8) of the auxiliary machine lubricating oil system, and its oil outlet end is connected to the main oil supply pipe (4). The active gear pump (33) is connected to the control system.
4. The angle adjustment system for gas turbine inlet guide vanes according to claim 2, characterized in that, The oil supply monitoring device also includes a backup pump oil supply circuit (9), which includes a backup pump oil pipe (91), and a second manual valve (92), a backup gear pump (93), and a second check valve (94) connected in sequence to the backup pump oil pipe (91). The inlet end of the standby pump oil pipe (91) is connected to the oil supply main pipe (8) of the auxiliary machine lubricating oil system, and its outlet end is connected to the oil supply main pipe (4). The standby gear pump (93) is connected to the control system.
5. The angle adjustment system for gas turbine inlet guide vanes according to claim 4, characterized in that, The oil supply device also includes an overflow circuit (10) for preventing system overpressure, the overflow circuit (10) including: An overflow pipe (101) connecting the oil outlet ends of the main pump oil supply line (3) and the standby pump oil supply line (9), and an overflow valve (102) installed in the overflow pipe (101); The outlet end of the overflow pipe (101) is connected to the lubricating oil tank (7) of the auxiliary machine lubricating oil system; The overflow valve (102) is connected to the control system.
6. The angle adjustment system for gas turbine inlet guide vanes according to claim 2, characterized in that, The oil supply monitoring device also includes a filter (11) and a differential pressure transmitter (12); The filter device (11) is installed in the pipeline of the main oil supply pipe (4) and is located upstream of the electro-hydraulic servo valve (5) for filtering the hydraulic oil. The differential pressure transmitter (12) is connected to both the inlet and outlet sides of the filter device (11) and is also connected to the control system for monitoring and early warning of the operation of the filter device (11).
7. The angle adjustment system for gas turbine inlet guide vanes according to claim 2, characterized in that, The oil supply monitoring device also includes a bladder accumulator (13) connected to the oil supply main pipe (4). The bladder accumulator (13) is located at the inlet end of the electro-hydraulic servo valve (5) and is connected to the control system to store a certain amount of hydraulic oil.
8. The angle adjustment system for gas turbine inlet guide vanes according to claim 2, characterized in that, The oil supply monitoring device also includes a pressure transmitter (14) connected to the oil supply main pipe (4). The pressure transmitter (14) is connected to the control device to monitor the system pressure and to provide an alarm when the system pressure is abnormal.
9. The angle adjustment system for gas turbine inlet guide vanes according to claim 2, characterized in that, The fuel supply monitoring device also includes an integrated frame (15) for connecting to the base of the gas turbine. The integrated frame (15) is provided with two first mounting platforms (151) of equal height, a second mounting platform with a height greater than that of the first mounting platform (151), and a multi-layer integrated mounting plate (153) arranged vertically in space. Two first mounting platforms (151) are arranged laterally at intervals, and the active gear pump (33) and the standby gear pump (93) are respectively located on the two first mounting platforms (151); The second mounting platform is connected between the two first mounting platforms (151), the electro-hydraulic servo valve (5) is supported on the second mounting platform, the bladder accumulator is supported on the electro-hydraulic servo valve (5), and the filter device (11) is connected below the second mounting platform. The pressure transmitter (14) and the differential pressure transmitter (12) are respectively mounted on the integrated mounting plate (153).
10. A gas turbine, characterized in that, An angle adjustment system for gas turbine inlet guide vanes as described in any one of claims 1-9.