Gas turbine starting transmission device

Abstract

The utility model discloses a gas turbine starting transmission device. As the required starting power of the motor is relatively high, the size of the motor is large, and a reserved space for accommodating the motor has to be increased. The transmission device comprises a main transmission casing and an auxiliary transmission casing, and is characterized in that an auxiliary transmission shaft of the auxiliary transmission casing is connected to an auxiliary half coupling through a plate spring, and a main transmission shaft of the main transmission casing is connected to a main half coupling; the main half coupling is sleeved with the auxiliary half coupling, and a safety bushing is mounted in the main half coupling and the auxiliary half coupling through a bolt; the main transmission casing comprises a main shell, a gas compressor transmission assembly, a gas turbine transmission assembly, a lubricating oil pump transmission assembly and a fuel pump transmission assembly. A scrap indicator used for detecting the purity of oil discharged from the center transmission device is arranged on the upper portion of the main transmission casing, and a magnetic scrap iron catcher used for detecting the purity of all oil discharged from the transmission casing is arranged on the lower portion of the main transmission casing. The transmission device is applied to starting transmission of the gas turbine.

Description

Technical Field

[0001] The utility model relates to a gas turbine starting transmission device. Background Art

[0002] The basic principle of a gas turbine is to heat air by burning fuel, then use the air's energy to propel a turbine, which in turn drives a generator or other mechanical equipment. Like most internal combustion engines, gas turbines cannot operate independently (starting on their own) but require external force (energy) to start. The machine that provides the energy to rotate the gas turbine is typically called a starter. Currently, starters for small and medium-sized gas turbines in China are typically powered by DC motors. These motors are not only complex and prone to failure, but also require a separate, dedicated motor design, increasing costs. Furthermore, the high power required for the starter motor results in a larger motor, often requiring additional space to accommodate the motor. Therefore, we have designed a gas turbine starting drive to address these technical issues. Utility Model Content

[0003] The purpose of the utility model is to solve the above-mentioned problems, thereby providing a gas turbine starting transmission device.

[0004] The above purpose is achieved through the following technical solutions:

[0005] A gas turbine starting transmission device comprises: a main transmission casing and an auxiliary transmission casing, wherein the auxiliary transmission shaft of the auxiliary transmission casing is connected to an auxiliary half-coupling via a leaf spring, and the main transmission shaft of the main transmission casing is connected to a main half-coupling, wherein the main half-coupling and the auxiliary half-coupling are sleeved together and a safety bushing is installed therebetween via bolts;

[0006] The main transmission casing includes a main housing, a compressor transmission assembly, a gas turbine transmission assembly, a lubricating oil pump transmission assembly and a fuel pump transmission assembly;

[0007] A chip indicator is provided on the upper part of the main transmission casing for detecting the purity of the oil discharged from the central transmission device, and a magnetic iron chip catcher is provided on the lower part for detecting the purity of all oil discharged from the transmission casing.

[0008] The gas turbine starting transmission device described above, the compressor transmission assembly includes a compressor transmission shaft, a compressor rotor shaft and a compressor, the compressor transmission main bevel gear, the compressor transmission first sub-bevel gear and the compressor transmission second sub-bevel gear are fixed on the compressor transmission shaft, the compressor transmission main bevel gear on the compressor transmission shaft is meshed with the main transmission bevel gear on the main transmission shaft, and the compressor transmission first sub-bevel gear is meshed with the compressor rotor bevel gear on the compressor rotor shaft.

[0009] The gas turbine starting transmission device, the gas turbine transmission assembly includes a gas turbine rotor shaft, a gas turbine rotor spur gear and a gas turbine rotor bevel gear are fixed on the gas turbine rotor shaft, and the gas turbine rotor bevel gear is meshed with the second bevel gear of the compressor transmission.

[0010] The gas turbine starting transmission device described above, the lubricating oil pump transmission assembly includes a lubricating oil pump transmission leaf spring, a sensor shaft is sleeved on the lubricating oil pump transmission leaf spring, a speed sensor is installed on the main housing, the speed sensor is directly opposite to the sensor shaft, a lubricating oil pump transmission main spur gear is fixed on the sensor shaft, the end of the sensor shaft is fixed to the fuel pump transmission shaft through a coupling, and the lubricating oil pump transmission main spur gear is meshed with the gas turbine rotor spur gear.

[0011] The gas turbine starting transmission device, the fuel pump transmission assembly includes a fuel pump rotor shaft and a fuel pump, a fuel pump transmission main spur gear is fixed on the fuel pump rotor shaft, and the fuel pump transmission main spur gear is meshed with the fuel pump transmission secondary spur gear on the fuel pump transmission shaft.

[0012] The gas turbine starting transmission device, the auxiliary transmission casing includes an auxiliary housing and two motors, the output shafts of the two motors are fixed to the auxiliary power shaft, the auxiliary power shaft is fixed with an auxiliary transmission second bevel gear, and the auxiliary transmission second bevel gear is meshed with the auxiliary transmission first bevel gear on the auxiliary transmission shaft.

[0013] The gas turbine starting transmission device is described, wherein the second bevel gear of the compressor transmission is fixed on the compressor transmission shaft, and drives the sensor shaft to rotate through the gas turbine rotor bevel gear, the gas turbine rotor spur gear and the lubricating oil pump transmission pair spur gear. A spline is provided in the shaft for connecting to the lubricating oil pump group transmission leaf spring to transmit torque, and the speed of the low-pressure compressor rotor is measured by the installed speed sensor.

[0014] The gas turbine starting transmission device is provided with a gas turbine rotor manual turning position at the end of the gas turbine rotor shaft.

[0015] In the gas turbine starting transmission device, the main housing of the main transmission casing is equipped with an injector filter and an oil distribution injector.

[0016] In the gas turbine starting transmission device, the leaf spring of the auxiliary transmission casing is enclosed and protected by a shield. Beneficial effects

[0017] The utility model splits the high-power motor used in the traditional design into two motors with smaller powers, thereby reducing the time and material costs of designing a single high-power motor.

[0018] The utility model realizes that one machine drives the compressor transmission assembly, the gas turbine transmission assembly, the lubricating oil pump transmission assembly and the fuel pump transmission assembly to move through the auxiliary transmission casing, and the transmission is stable. At the same time, the lubricating oil pump transmission assembly and the fuel pump transmission assembly do not require additional power for transmission.

[0019] 3. The utility model fixes the safety bushing in the main half-coupling and the auxiliary half-coupling by bolts. The safety bushing is damaged and disconnected when the system exceeds the allowable torque, thereby protecting the entire transmission system. When the torque exceeds the safety value, the safety bushing is damaged and disconnected, and needs to be replaced. First, remove the bolts and anti-loosening washers connecting the main half-coupling and the auxiliary half-coupling, then slide the spline shaft away from the safety bushing until the axial distance allows the main half-coupling and the auxiliary half-coupling to be removed together with the safety bushing, and then replace the new safety bushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the utility model;

[0021] Figure 2 It is a simplified structural diagram of the utility model;

[0022] Figure 3 It is a side view of the main transmission casing;

[0023] Figure 4 This is the front view of the main transmission casing;

[0024] Figure 5 yes Figure 3 AA section view;

[0025] Figure 6 yes Figure 5 CC section view;

[0026] Figure 7 yes Figure 4 BB section view;

[0027] Figure 8 yes Figure 4 EE section view;

[0028] Figure 9 yes Figure 3 DD section view;

[0029] Figure 10 It is a structural diagram of the auxiliary transmission casing;

[0030] Figure 11 yes Figure 10HH section view;

[0031] Figure 12 It is a structural diagram of the safety bushing connection;

[0032] Figure: 1. Main transmission casing; 2. Main half-coupling; 3. Safety bushing; 4. Leaf spring; 5. Auxiliary transmission casing; 6. Bolt; 11. Auxiliary half-coupling; 12. Shield; 1.1. Centrifugal ratchet clutch; 1.2. Main transmission shaft; 1.3. Main transmission bevel gear; 1.4. Compressor transmission main bevel gear; 1.5. Compressor transmission shaft; 1.6. Compressor transmission first bevel gear; 1.7. Compressor rotor bevel gear; 1.8. Compressor rotor shaft; 1.9. Compressor; 1.10. Compressor transmission second bevel gear; 1.11. Gas turbine rotor bevel gear; 1.12. Gas turbine rotor shaft; 1.13. Gas turbine rotor spur gear; 1.14. Gas turbine rotor manual turning position; 1.15. Lubricating oil pump transmission main spur gear; 1.16. Lubricating oil pump transmission leaf spring; 1.17. Speed sensor 1.18, Lubricating oil pump; 1.19, Sensor shaft; 1.20, Fuel pump drive secondary spur gear; 1.21, Fuel pump drive main spur gear; 1.22, Fuel pump rotor shaft; 1.23, Fuel pump; 1.24, Main housing; 1.25, Sleeve; 1.26, Magnetic debris collector; 1.27, Debris indicator; 1.28, Fuel injector; 1.29, Injector filter; 1.3 0. Fuel pump drive shaft; 1.1.1. Bearing inner ring; 1.1.2. Bearing outer ring; 1.1.3. Pin; 1.1.4. Bayonet pin; 1.1.5. Piston; 1.1.6. Spring; 5.1. Auxiliary drive shaft; 5.2. Auxiliary drive first bevel gear; 5.3. Auxiliary drive second bevel gear; 5.4. Auxiliary power shaft; 5.5. Motor; 5.6. Oil dipstick; 5.7. Pipe joint; 5.8. Auxiliary housing. DETAILED DESCRIPTION

[0033] Reference Figure 1 A gas turbine starting transmission device comprises: a main transmission casing 1 and an auxiliary transmission casing 5, wherein the main transmission casing 1 and the auxiliary transmission casing 5 are mounted horizontally and centered, wherein the auxiliary transmission shaft 5.1 of the auxiliary transmission casing is connected to an auxiliary half-coupling 11 via a leaf spring 4, and the main transmission shaft 1.2 of the main transmission casing is connected to a main half-coupling 2, wherein the main half-coupling and the auxiliary half-coupling are sleeved together and a safety bushing 3 is mounted therebetween via a bolt 6;

[0034] The main transmission casing includes a main housing 1.24, a compressor transmission assembly, a gas turbine transmission assembly, a lubricating oil pump transmission assembly and a fuel pump transmission assembly;

[0035] A chip indicator 1.27 is provided on the upper portion of the main transmission casing for detecting the purity of the oil discharged from the central transmission device, and a magnetic iron chip catcher 1.26 is provided on the lower portion for detecting the purity of all oil discharged from the transmission casing.

[0036] The main transmission casing has flanges on both sides. One side is a rectangular flange for fixing the lubricating oil pump assembly; the other side is for installing the fuel pump. A boss is provided along the axis of the main casing, on which the main transmission bevel gear 1.3 and the centrifugal ratchet clutch 1.1 are mounted.

[0037] The centrifugal ratchet clutch comprises a bearing outer ring 1.1.2 and a bearing inner ring 1.1.1. Multiple latching pins 1.1.4 are connected to the bearing inner ring via pins 1.1.3. A piston 1.1.5 with a spring 1.1.6 presses the claws against the bearing outer ring through the through-holes of the bearing inner ring, thereby engaging with the protrusions on the bearing outer ring. Torque is transmitted from the bearing outer ring to the pins and the bearing inner ring.

[0038] Because the center of rotation of the bayonet pin is designed to be inconsistent with its center of gravity, when the coupling reaches the starting speed K, the centrifugal force acting on the bayonet pin becomes greater than the spring torque, causing the bayonet pin to disengage—the clutch is disconnected and remains disconnected under all gas turbine operating conditions.

[0039] When the unit stops and the speed drops below the starting speed K, the centrifugal force acting on the detent pin becomes less than the spring torque, causing the detent pin to rotate toward engagement. When the back of the detent pin contacts the raised point on the outer race of the active half coupling, the coupling resumes engagement. This process is completed before the low-pressure compressor rotor completely stops. When the unit is shut down, the clutch is always ready to operate again.

[0040] The gas turbine starting transmission device is described, wherein the compressor transmission assembly includes a compressor transmission shaft 1.5, a compressor rotor shaft 1.8 and a compressor 1.9. A compressor transmission main bevel gear 1.4, a compressor transmission first sub-bevel gear 1.6 and a compressor transmission second sub-bevel gear 1.10 are fixed to the compressor transmission shaft. The compressor transmission main bevel gear 1.4 on the compressor transmission shaft is meshed with the main transmission bevel gear 1.3 on the main transmission shaft, and the compressor transmission first sub-bevel gear is meshed with the compressor rotor bevel gear 1.7 on the compressor rotor shaft.

[0041] The gas turbine starting transmission device, the gas turbine transmission assembly includes a gas turbine rotor shaft 1.12, on which a gas turbine rotor spur gear 1.13 and a gas turbine rotor bevel gear 1.11 are fixed, and the gas turbine rotor bevel gear is meshed with the second bevel gear of the compressor transmission.

[0042] A gas turbine starting transmission device, wherein the lubricating oil pump transmission assembly includes a lubricating oil pump transmission leaf spring 1.16, a sensor shaft 1.19 being sleeved on the lubricating oil pump transmission leaf spring, a speed sensor 1.17 being mounted on the main housing, the speed sensor facing the sensor shaft, a lubricating oil pump transmission main spur gear 1.15 being fixed to the sensor shaft, the end of the sensor shaft being fixed to a fuel pump transmission shaft 1.30 via a coupling, and the lubricating oil pump transmission main spur gear being meshed with the gas turbine rotor spur gear.

[0043] The gas turbine starting transmission device described above includes a fuel pump transmission assembly including a fuel pump rotor shaft 1.22 and a fuel pump 1.23. A fuel pump transmission main spur gear 1.21 is fixed to the fuel pump rotor shaft. The fuel pump transmission main spur gear is meshed with a fuel pump transmission secondary spur gear 1.20 on a fuel pump transmission shaft 1.30.

[0044] The gas turbine starting transmission device, the auxiliary transmission casing includes an auxiliary housing 5.8 and two motors 5.5, the output shafts of the two motors are fixed to the auxiliary power shaft, and the auxiliary power shaft is fixed with an auxiliary transmission second bevel gear 5.3, and the auxiliary transmission second bevel gear is meshed with the auxiliary transmission first bevel gear 5.2 on the auxiliary transmission shaft.

[0045] The auxiliary transmission case combines torque and steering. Lubrication of the bearings and bevel gear meshing within the case is achieved through an oil bath. The oil level within the case is indicated by the dipstick 5.6. Oil is poured into the case through the hole where the dipstick is mounted until the oil level reaches between the upper and lower marks on the dipstick. A pipe fitting 5.7, located at the lower end of the case, is used to drain the lubricant from the case.

[0046] The gas turbine starting transmission device is described, and the second bevel gear of the compressor transmission is fixed on the compressor transmission shaft 1.5. The sensor shaft is driven to rotate through the gas turbine rotor bevel gear, the gas turbine rotor spur gear and the lubricating oil pump transmission spur gear. A spline is provided in the shaft for connecting to the lubricating oil pump group transmission leaf spring to transmit torque. The speed sensor is installed to measure the speed of the low-pressure compressor rotor. The sensor shaft induces the sensor to generate a signal proportional to the speed of the low-pressure compressor rotor, which is used to detect the condition of the unit.

[0047] The gas turbine starting transmission device is provided with a gas turbine rotor manual turning position 1.14 at the end of the gas turbine rotor shaft.

[0048] In the gas turbine starting transmission device, an injector filter 1.29 and an oil distribution injector 1.28 are installed in the main housing of the main transmission casing.

[0049] The main transmission casing is equipped with an injector filter, which not only filters impurities in the lubricating oil but also lubricates the main transmission casing;

[0050] In the gas turbine starting transmission device, the leaf spring of the auxiliary transmission casing is enclosed and protected by a shield 12.

[0051] The utility model can not only be used to quickly start the gas turbine in a limited space, but also provide power for the auxiliary and maintenance devices of the gas turbine;

[0052] The utility model has a simple structure, small space occupation, reliable transmission, and easy disassembly and maintenance;

[0053] Working principle: During transmission, the motor starts, driving the auxiliary power shaft 5.4 to rotate. The auxiliary power shaft is fixed with the auxiliary transmission second bevel gear, which meshes with the auxiliary transmission first bevel gear, thereby driving the auxiliary transmission shaft 5.1 to rotate, and finally the main transmission shaft 1.2 to rotate. The main transmission shaft is fixed with the main transmission bevel gear 1.3, which meshes with the compressor transmission main bevel gear 1.4 on the compressor transmission shaft 1.5. The compressor transmission first sub-bevel gear 1.6 is also fixed to the compressor transmission shaft. The compressor transmission first sub-bevel gear 1.6 meshes with the compressor rotor bevel gear 1.7 on the compressor rotor shaft, thereby driving the compressor to rotate;

[0054] A second bevel gear 1.10 for compressor drive is also fixed to the end of the compressor drive shaft 1.5. The second bevel gear 1.10 for compressor drive meshes with the gas turbine rotor bevel gear 1.11 on the gas turbine rotor shaft 1.12, thereby driving the gas turbine rotor shaft 1.12 to rotate. A gas turbine rotor spur gear 1.13 is also fixed to the gas turbine rotor shaft 1.12. The gas turbine rotor spur gear 1.13 meshes with the lubricating oil pump drive main spur gear 1.15 on the inductor shaft 1.19, thereby driving the inductor shaft to rotate, and the lubricating oil pump is driven to rotate through the lubricating oil pump drive leaf spring 1.16. A fuel pump drive sub-spur gear 1.20 is fixed to the fuel pump drive shaft 1.30. The fuel pump drive sub-spur gear 1.20 meshes with the fuel pump drive main spur gear on the fuel pump rotor shaft 1.22, thereby driving the fuel pump rotor shaft to rotate, completing this transmission.

Claims

1. A gas turbine starting transmission device, comprising: The main transmission casing and the auxiliary transmission casing are characterized in that: the auxiliary transmission shaft of the auxiliary transmission casing is connected to the auxiliary half-coupling through a leaf spring, the main transmission shaft of the main transmission casing is connected to the main half-coupling, the main half-coupling and the auxiliary half-coupling are sleeved together and a safety bushing is installed therein by bolts; The main transmission casing includes a main housing, a compressor transmission assembly, a gas turbine transmission assembly, a lubricating oil pump transmission assembly and a fuel pump transmission assembly; A chip indicator is provided on the upper part of the main transmission casing for detecting the purity of the oil discharged from the central transmission device, and a magnetic iron chip catcher is provided on the lower part for detecting the purity of all oil discharged from the transmission casing.

2. A gas turbine starting transmission device according to claim 1, characterized in that: The compressor transmission assembly includes a compressor drive shaft, a compressor rotor shaft and a compressor. The compressor drive shaft is fixed with a compressor drive main bevel gear, a compressor drive first sub-bevel gear and a compressor drive second sub-bevel gear. The compressor drive main bevel gear on the compressor drive shaft is meshed with the main drive bevel gear on the main drive shaft, and the compressor drive first sub-bevel gear is meshed with the compressor rotor bevel gear on the compressor rotor shaft.

3. A gas turbine starting transmission device according to claim 2, characterized in that: The gas turbine transmission assembly includes a gas turbine rotor shaft, on which a gas turbine rotor spur gear and a gas turbine rotor bevel gear are fixed, and the gas turbine rotor bevel gear is meshed with the second bevel gear of the compressor transmission.

4. A gas turbine starting transmission device according to claim 3, characterized in that: The lubricating oil pump transmission assembly includes a lubricating oil pump transmission leaf spring, a sensor shaft is sleeved on the lubricating oil pump transmission leaf spring, a speed sensor is installed on the main housing, the speed sensor is facing the sensor shaft, a lubricating oil pump transmission main spur gear is fixed on the sensor shaft, the end of the sensor shaft is fixed to the fuel pump transmission shaft through a coupling, and the lubricating oil pump transmission main spur gear is meshed with the gas turbine rotor spur gear.

5. A gas turbine starting transmission device according to claim 4, characterized in that: The fuel pump transmission assembly includes a fuel pump rotor shaft and a fuel pump. A fuel pump transmission main spur gear is fixed on the fuel pump rotor shaft. The fuel pump transmission main spur gear is meshed with the fuel pump transmission secondary spur gear on the fuel pump transmission shaft.

6. A gas turbine starting transmission device according to claim 5, characterized in that: The auxiliary transmission casing includes an auxiliary housing and two motors. The output shafts of the two motors are fixed to the auxiliary power shaft. The auxiliary power shaft is fixed with an auxiliary transmission second bevel gear, which is meshed with the auxiliary transmission first bevel gear on the auxiliary transmission shaft.

7. A gas turbine starting transmission device according to claim 6, characterized in that: The second bevel gear of the compressor drive is fixed on the compressor drive shaft, and drives the sensor shaft to rotate through the gas turbine rotor bevel gear, the gas turbine rotor spur gear and the lubricating oil pump drive pair spur gear. A spline is provided inside the shaft for connecting to the lubricating oil pump group drive leaf spring to transmit torque, and the speed of the low-pressure compressor rotor is measured by the installed speed sensor.

8. A gas turbine starting transmission device according to claim 7, characterized in that: The end of the gas turbine rotor shaft is provided with a manual turning position for the gas turbine rotor.

9. A gas turbine starting transmission device according to claim 8, characterized in that: The main housing of the main transmission casing is equipped with a fuel injector filter and an oil distribution injector.

10. A gas turbine starting transmission device according to claim 9, characterized in that: The leaf spring of the auxiliary transmission casing is enclosed and protected by a shield.

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