Gas turbine starting transmission device
By splitting the high-power motor into two smaller power motors and driving multiple transmission components through auxiliary transmission receivers, the problems of complex structure and high cost of existing gas turbine starters are solved, and the stability of transmission is achieved and efficient use of space.
Patent Information
- Application Number
- CN202411863740.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-02-14
AI Technical Summary
The power source of existing gas turbine starters is usually high-power DC motors, with complex structures and high failure rates, which increase costs and space requirements.
A gas turbine start transmission device is designed to split the traditional high-power motor into two smaller power motors, and to drive the movement of multiple transmission components through an auxiliary transmission receiver, the transmission is stable and does not require additional power.
The time and material cost of individually designed high-power motors are reduced, the stability of transmission and efficient use of space are achieved, and the maintenance and disassembly process is simplified.
Smart Images
Figure CN119435212A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a gas turbine starting transmission device. Background Art
[0002] The basic principle of a gas turbine is to heat the air by burning fuel, and then use the air energy to drive the turbine, which in turn drives the generator or other mechanical equipment to operate. Like most internal combustion engines, gas turbines cannot work independently (start by themselves), but require external force (energy) to help them start. Usually, the machine that provides energy to drive the gas turbine to rotate is called a starter. At present, the power source of the starter of small and medium-sized gas turbines in China is generally a DC motor, which not only has a complex structure and a high failure rate, but also requires a separate design of a special power motor to increase the cost. Not only that, due to the large power of the required starting motor, the motor is large in size, and often has to increase the reserved space to accommodate the motor. Therefore, we designed a gas turbine starting transmission device to solve the above technical problems. Summary of the invention
[0003] The object of the present invention 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: A gas turbine starting transmission device, comprising: 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 through a leaf spring, the 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 installed therein through 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 for detecting the purity of oil discharged from the central transmission device is provided on the upper part of the main transmission casing, and a magnetic iron chip catcher for detecting the purity of all oil discharged from the transmission casing is provided on the lower part.
[0005] The gas turbine starting transmission device described herein, 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.
[0006] 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.
[0007] The gas turbine starting transmission device described herein, the lubricating oil pump transmission assembly includes a lubricating oil pump transmission leaf spring, the lubricating oil pump transmission leaf spring is sleeved with a sensor shaft, 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.
[0008] The fuel pump transmission assembly of the gas turbine starting transmission device 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.
[0009] The gas turbine starting transmission device described herein, 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, an auxiliary transmission second bevel gear is fixed on the auxiliary power shaft, and the auxiliary transmission second bevel gear is meshed with the auxiliary transmission first bevel gear on the auxiliary transmission shaft.
[0010] The gas turbine starting transmission device described above, the compressor transmission second bevel gear is fixed on the compressor transmission shaft, and 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 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.
[0011] The gas turbine starting transmission device is provided with a manual turning position for the gas turbine rotor at the end of the gas turbine rotor shaft.
[0012] In the gas turbine starting transmission device, a fuel injector filter and a fuel distribution injector are installed in the main housing of the main transmission casing.
[0013] In the gas turbine starting transmission device, the leaf spring of the auxiliary transmission casing is enclosed and protected by a shield. Beneficial Effects
[0014] 1. The present invention 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 high-power motor separately.
[0015] 2. The present invention 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 need additional power for transmission.
[0016] 3. The present invention 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, and 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 it with a new safety bushing. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural diagram of the present invention; Figure 3 It is a side view of the main transmission case; Figure 4 It is the front view of the main transmission casing; Figure 5 yes Figure 3 AA section view; Figure 6 yes Figure 5 The CC section view; Figure 7 yes Figure 4 BB section view; Figure 8 yes Figure 4 EE section view; Fig. 9 yes Figure 3 DD section view; Fig.10 It is a schematic diagram of the structure of the auxiliary transmission casing; Fig.11 yes Fig.10 A cross-sectional view of the HH portion; Fig.12 It is a schematic diagram of the structure of the safety bushing connection; In the 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 transmission secondary spur gear; 1.21, fuel pump transmission 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. Inner ring of bearing; 1.1.2. Outer ring of bearing; 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
[0018] Reference Figure 1 A gas turbine starting transmission device, comprising: a main transmission casing 1 and an auxiliary transmission casing 5, the main transmission casing 1 and the auxiliary transmission casing 5 are horizontally and centrally installed, the auxiliary transmission shaft 5.1 of the auxiliary transmission casing is connected to the auxiliary half coupling 11 through a leaf spring 4, the main transmission shaft 1.2 of the main transmission casing is connected to the main half coupling 2, the main half coupling is sleeved with the auxiliary half coupling and a safety bushing 3 is installed therein through a bolt 6; 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; A chip indicator 1.27 for detecting the purity of oil discharged from the central transmission device is provided on the upper part of the main transmission casing, and a magnetic iron chip catcher 1.26 for detecting the purity of all oil discharged from the transmission casing is provided on the lower part.
[0019] The main housing of the main transmission case is provided with flanges on both sides. One side is a rectangular flange for fixing the lubricating oil pump set; the other side flange is used to install the fuel pump. A convex seat is provided along the axis of the main housing, on which the main transmission bevel gear 1.3 and the centrifugal ratchet clutch 1.1 are installed; The centrifugal ratchet clutch comprises a bearing outer ring 1.1.2 and a bearing inner ring 1.1.1, and the bearing inner ring is connected with a plurality of bayonet pins 1.1.4 through pins 1.1.3, and the through hole of the bearing inner ring is pressed against the bearing outer ring by a piston 1.1.5 with a spring 1.1.6, so as to mesh with the convex point on the bearing outer ring. The torque is transmitted from the bearing outer ring to the pins and the bearing inner ring; Since the rotation center of the designed bayonet pin is not consistent with its center of gravity, when the coupling reaches the starting speed K, the torque of the centrifugal force acting on the bayonet pin is greater than the torque of the spring, and the bayonet pin disengages - the clutch is disconnected and remains disconnected under all operating conditions of the gas turbine.
[0020] When the unit stops running and the speed drops below the starting speed K, the centrifugal force acting on the bayonet is less than the spring torque, and the bayonet rotates toward the meshing trend. When the back of the bayonet touches the outer ring convex point of the active half coupling, the coupling resumes meshing. This process is completed before the low-pressure compressor rotor stops completely. When the unit is shut down, the clutch is always ready to run again.
[0021] The gas turbine starting transmission device described herein, 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 on 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.
[0022] The gas turbine starting transmission device, the gas turbine transmission assembly includes a gas turbine rotor shaft 1.12, a gas turbine rotor spur gear 1.13 and a gas turbine rotor bevel gear 1.11 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.
[0023] A gas turbine starting transmission device, the lubricating oil pump transmission assembly includes a lubricating oil pump transmission leaf spring 1.16, a sensor shaft 1.19 is sleeved on the lubricating oil pump transmission leaf spring, a speed sensor 1.17 is installed on the main housing, the speed sensor is directly opposite to the sensor shaft, a lubricating oil pump transmission main spur gear 1.15 is fixed on the sensor shaft, the end of the sensor shaft is fixed to the fuel pump transmission shaft 1.30 through a coupling, and the lubricating oil pump transmission main spur gear is meshed with the gas turbine rotor spur gear.
[0024] The gas turbine starting transmission device described herein, the fuel pump transmission assembly includes a fuel pump rotor shaft 1.22 and a fuel pump 1.23, a fuel pump transmission main spur gear 1.21 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 1.20 on the fuel pump transmission shaft 1.30.
[0025] The gas turbine starting transmission device described herein, 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, an auxiliary transmission second bevel gear 5.3 is fixed on the auxiliary power shaft, and the auxiliary transmission second bevel gear is meshed with the auxiliary transmission first bevel gear 5.2 on the auxiliary transmission shaft.
[0026] The purpose of the auxiliary transmission case is to combine torque and steering. The lubrication of the bearings and bevel gear meshing in the case is achieved by oil bath method. The oil level in the case is shown by the oil dipstick 5.6. Oil is poured into the case through the hole where the oil dipstick is installed until the oil level is between the upper and lower marks of the oil dipstick. The pipe joint 5.7 is located at the lower end of the case and is used to drain the lubricating oil in the case.
[0027] The gas turbine starting transmission device described above, the compressor transmission second bevel gear is fixed on the compressor transmission shaft 1.5, and 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 pair 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 of the low-pressure compressor rotor is measured by the installed speed sensor. 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 unit condition.
[0028] 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.
[0029] In the gas turbine starting transmission device, the main housing of the main transmission casing is provided with an injector filter 1.29 and an oil distribution injector 1.28.
[0030] 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; In the gas turbine starting transmission device, the leaf spring of the auxiliary transmission casing is enclosed and protected by a shield 12.
[0031] The present invention can not only be used to quickly start a gas turbine in a limited space, but also provide power for auxiliary and maintenance devices of the gas turbine; The invention has a simple structure, small space occupation, reliable transmission, and easy disassembly and maintenance; Working principle: When the transmission is in progress, 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, and the auxiliary transmission second bevel gear 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 is rotated, the main transmission bevel gear 1.3 is fixed on the main transmission shaft, the main transmission bevel gear meshes with the compressor transmission main bevel gear 1.4 on the compressor transmission shaft 1.5, and the compressor transmission first sub-bevel gear 1.6 is also fixed on the compressor transmission shaft, and 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; A compressor drive second bevel gear 1.10 is also fixed to the end of the compressor drive shaft 1.5. The compressor drive second bevel gear 1.10 is meshed 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 is meshed with the lubricating oil pump drive main spur gear 1.15 on the sensor shaft 1.19, thereby driving the sensor 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 is meshed 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 the transmission.
Claims
1. A gas turbine starting transmission device, comprising: The main transmission case and the auxiliary transmission case are characterized in that: the auxiliary transmission shaft of the auxiliary transmission case is connected to the auxiliary half-coupling through a leaf spring, the main transmission shaft of the main transmission case is connected to the main half-coupling, the main half-coupling is sleeved with the auxiliary half-coupling and a safety bushing is installed therein through 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 for detecting the purity of oil discharged from the central transmission device is provided on the upper part of the main transmission casing, and a magnetic iron chip catcher for detecting the purity of all oil discharged from the transmission casing is provided on the lower part.
2. A gas turbine starting transmission device according to claim 1, characterized in that: The compressor transmission assembly includes a compressor transmission shaft, a compressor rotor shaft and a compressor. A compressor transmission main bevel gear, a compressor transmission first sub-bevel gear and a 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.
3. A gas turbine starting transmission device according to claim 1, characterized in that: The gas turbine transmission assembly comprises 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 1, 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 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.
5. A gas turbine starting transmission device according to claim 1, characterized in that: The fuel pump transmission assembly comprises 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 a fuel pump transmission secondary spur gear on the fuel pump transmission shaft.
6. A gas turbine starting transmission device according to claim 1, 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, an auxiliary transmission second bevel gear is fixed on the auxiliary power shaft, and the auxiliary transmission second bevel gear is meshed with the auxiliary transmission first bevel gear on the auxiliary transmission shaft.
7. A gas turbine starting transmission device according to claim 2, 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 3, 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 1, characterized in that: The main housing of the main transmission casing is provided with a fuel injector filter and a fuel distribution injector.
10. A gas turbine starting transmission device according to claim 1, characterized in that: The leaf spring of the auxiliary transmission casing is enclosed and protected by a protective cover.