A radially adjustable pre-swirl system nozzle adjustment assembly based on planetary gears

Abstract

The present invention relates to a radially adjustable pre-swirl system nozzle adjustment component based on planetary gears, which belongs to the field of aircraft engine pre-swirl technology. It solves the problem that the engine cooling air adjustment method in the prior art requires a complex driving device and is difficult to achieve precise synchronous control of the pre-swirl system. The present invention comprises: a pre-swirl system having a pre-swirl nozzle and a pre-swirl nozzle rotating shaft connected to the pre-swirl nozzle, a driving module, and a transmission module, wherein the transmission module comprises: a main gear bearing, a main gear mounted on the main gear bearing, a driving planetary gear meshed with the inner part of the main gear ring gear, and a plurality of follower planetary gears meshed with the inner and outer parts of the main gear ring gear, wherein each of the driving planetary gears and the follower planetary gears is respectively connected to each pre-swirl nozzle rotating shaft, and the driving planetary gear is connected to the driving module, so that the driving module drives the pre-swirl nozzle rotating shaft connected to the driving planetary gear via the driving planetary gear.

Description

Technical Field

[0001] The invention relates to the technical field of aero-engine pre-swirl systems, and in particular to a radially adjustable pre-swirl system nozzle adjustment component based on planetary gears. Background Art

[0002] The pre-swirl system is an important component of the secondary air system of an aircraft engine. Through reasonable design, it can effectively reduce the relative total temperature of the cooling air and improve the performance of the pre-swirl system. The characteristic of future aircraft engines with variable cycle characteristics is that the air bleed volume requirements in different states vary greatly. Excessive pre-swirl system air bleed will lead to increased power consumption and engine fuel consumption. In addition, the number of adjustable components in future variable cycle engines will increase, and the combination adjustment rules will be more complex. This will lead to the complication of the boundary combination of the air system and the increase in the discretization of the air path parameters. When the main channel components are adjusted with variable geometry, the fixed geometry pre-swirl system configuration design faces tremendous pressure to ensure the normal implementation of functions such as cooling, rim sealing, and axial force control within a wider envelope. Pre-swirl system adjustment technology has extremely high application potential in future aircraft engines.

[0003] However, existing cooling air regulation methods require complex drive devices and are difficult to achieve precise synchronous control of the pre-swirl system. Therefore, there is a need in the art for a simple and precise regulation method for the pre-swirl system of an aircraft engine. Summary of the Invention

[0004] In response to the problem of how to adjust the pre-swirl system of future aircraft engines, the present invention provides a radially adjustable pre-swirl system nozzle adjustment component based on planetary gears. Through the meshing transmission of the planetary gear device, the synchronous adjustment of the blade-type pre-swirl nozzle is achieved, thereby controlling the flow and pressure of the pre-swirl system.

[0005] According to one embodiment of the present invention, a planetary gear-based radially adjustable pre-swirl system nozzle adjustment assembly is provided. The assembly is disposed between an engine rotor and turbine blades and is used to cool the turbine blades. The assembly is characterized in that it includes a pre-swirl system, a transmission module, and a drive module for driving the pre-swirl nozzle in the pre-swirl system to adjust the pre-swirl nozzle, wherein:

[0006] The pre-swirl system includes: inner sealing grate teeth and outer sealing grate teeth arranged around the outer circumference of the engine rotor and axially from the inside to the outside, a receiving hole formed between the inner sealing grate teeth and the outer sealing grate teeth, an inner sealing grate tooth sealing ring and an outer sealing grate tooth sealing ring respectively arranged around the outer circumference of the inner sealing grate teeth and the outer sealing grate teeth and axially from the inside to the outside, a pre-swirl cavity formed between the inner sealing grate tooth sealing ring and the outer sealing grate tooth sealing ring, a pre-swirl channel left support plate and a pre-swirl channel plate radially extending outward from the pre-swirl cavity and spaced apart in the axial direction. a right branch plate of the pre-swirl channel, a pre-swirl channel between the left branch plate of the pre-swirl channel and the right branch plate of the pre-swirl channel, a plurality of cascade-type pre-swirl nozzles circumferentially distributed in the pre-swirl channel, a pre-swirl nozzle rotating shaft respectively connected to each pre-swirl nozzle, a cover plate disk disposed on the outer side of the right branch plate of the pre-swirl channel, a turbine disk mounted on the outer side of the cover plate disk, a cover plate cavity formed between the cover plate disk and the turbine disk, and a blade air supply hole formed in the turbine disk, the cover plate cavity being connected to the receiving hole, the blade air supply hole comprising an inner end connected to the cover plate cavity and an outer end connected to the turbine blade;

[0007] The transmission module includes: a main gear bearing mounted to the outer periphery of the inner sealing grate sealing ring, a main gear mounted on the main gear bearing, a driving planetary gear meshed with the inner portion of the gear ring of the main gear, and a plurality of follower planetary gears meshed with the inner and outer portions of the gear ring of the main gear, wherein each of the driving planetary gears and the follower planetary gears is respectively connected to each pre-rotation nozzle shaft, and the driving planetary gears are connected to the driving module, so that the driving module drives the pre-rotation nozzle shaft connected to the driving planetary gear via the driving planetary gear.

[0008] In an optional embodiment, the drive module includes: a drive motor, a reducer and a coupling connected in series, the reducer and the coupling are connected in series to the output shaft of the drive motor to be driven thereby, wherein the rotating shaft of the drive motor is parallel to the axial direction of the transmitter rotor; the drive planetary gear connected to the drive module is connected to the coupling of the drive module.

[0009] In an optional embodiment, the sum of the number of the driving planetary gears and the follower planetary gears is the same as the number of the pre-swirl nozzles.

[0010] In an optional embodiment, the number of the pre-swirl nozzles and the pre-swirl nozzle rotating shafts is 24, and the number of the follower planetary gears is 23, so that the sum of the number of driving planetary gears and follower planetary gears is equal to the number of pre-swirl nozzles.

[0011] In an optional embodiment, half of the driving planetary gears and the follower planetary gears are arranged on the inner part of the ring gear of the main gear, and the other half of the planetary gears are arranged on the outer part of the ring gear of the main gear.

[0012] In an optional embodiment, the driving planetary gears and the follower planetary gears are arranged alternately with each other on the outer periphery of the main gear, and are arranged so that there is no meshing relationship between the driving planetary gears and the follower planetary gears.

[0013] In an optional embodiment, the driving planetary gear is formed with an extended protruding connecting portion on the inner side for connecting to a coupling.

[0014] In an optional embodiment, the transmission module further includes a main gear bearing locking nut mounted on the inner side of the main gear bearing.

[0015] According to another embodiment of the present invention, a planetary gear-based radially adjustable pre-swirl system nozzle adjustment assembly is provided, which includes a drive motor, a reducer, a coupling, a drive planetary gear, a drive shaft, a main gear, a follower planetary gear and a pre-swirl nozzle. The drive motor drives one of the pre-swirl nozzles and the drive planetary gear connected to the pre-swirl nozzle to rotate, and the drive planetary gear engages with the main gear, driving the main gear to rotate, thereby driving the follower planetary gear and the blade-type pre-swirl nozzle connected to it, thereby realizing synchronous adjustment of the pre-swirl nozzle.

[0016] Furthermore, there is one main gear installed on the main gear bearing, the number of planetary gears is the same as the number of adjustable pre-swirl nozzles, the number of teeth and radius of the main gear and planetary gears meet the gear transmission design principles, and the driving force is greater than the aerodynamic resistance and mechanical resistance during the pre-swirl nozzle adjustment process.

[0017] Furthermore, the planetary gear is connected to the rotating shaft of the cascade head, driving the cascade pre-swirl nozzle to rotate, allowing the pre-swirl nozzle angle to be adjusted within a range of 10-20 degrees. When the planetary gear is driven clockwise, the main gear rotates counterclockwise, driving the follower planetary gear clockwise, increasing the throat area of ​​the cascade pre-swirl channel and increasing the airflow rate. When the planetary gear is driven counterclockwise, the main gear rotates clockwise and drives the follower planetary gear counterclockwise, decreasing the throat area of ​​the cascade pre-swirl channel and reducing the airflow rate.

[0018] Furthermore, in order to ensure the meshing transmission between the planetary gears and the main gear, the planetary gears are staggered in two rows in the axial direction, with 12 planetary gears in each row. There is no meshing relationship between the planetary gears and they do not interfere with each other.

[0019] Compared with the prior art, the radially adjustable pre-swirl system nozzle adjustment assembly based on planetary gears provided in accordance with an embodiment of the present invention has at least the following beneficial effects:

[0020] 1. The angle of the cascade pre-swirl nozzle is adjusted by one motor, and the other pre-swirl nozzles are driven to rotate by planetary gears. Compared with the adjustment method using multiple sets of drive devices, the synchronization of the adjustment is greatly improved.

[0021] 2. Two rows of staggered planetary gears along the axial direction achieve a compact layout for the cascade-type pre-swirl nozzle adjustment assembly. Furthermore, the gear-driven adjustment method offers high reliability and precision, with the pre-swirl nozzle angle adjustable to 0.1°. This allows for stable and accurate control of the pre-swirl system to provide optimal flow and pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. By referring to the drawings, the features and advantages of the present invention can be more clearly understood. The drawings are schematic and should not be understood as limiting the present invention in any way. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 Schematic diagram of a nozzle adjustment assembly of a radially adjustable pre-swirl system based on planetary gears according to an embodiment of the present invention.

[0024] Figure 2 The diagram is a schematic diagram of increasing the angle adjustment of a cascade-type adjustable pre-swirl nozzle of a planetary gear-based radially adjustable pre-swirl system nozzle adjustment assembly according to an embodiment of the present invention.

[0025] Figure 3 The diagram is a schematic diagram of angle reduction adjustment of a cascade-type adjustable pre-swirl nozzle of a planetary gear-based radially adjustable pre-swirl system nozzle adjustment assembly according to an embodiment of the present invention.

[0026] Figure 4 Schematic diagram of the arrangement layout and meshing relationship of the planetary gears of the nozzle adjustment assembly of the radially adjustable pre-swirl system based on planetary gears according to an embodiment of the present invention.

[0027] Figure 5 A schematic diagram of the change of the relative flow rate of cooling gas with the pre-swirl angle in an embodiment of a radially adjustable pre-swirl system nozzle adjustment assembly based on planetary gears provided in accordance with an embodiment of the present invention.

[0028] Figure 6 A schematic diagram comparing flow rate regulation deviations of an embodiment of a radially adjustable pre-swirl system nozzle adjustment assembly based on planetary gears provided according to an embodiment of the present invention and existing adjustment methods.

[0029] Figure 7 A schematic diagram comparing the synchronization of an embodiment of a radially adjustable pre-swirl system nozzle adjustment assembly based on planetary gears provided in accordance with an embodiment of the present invention and an existing adjustment method.

[0030] Reference numerals:

[0031] 101. Drive motor;

[0032] 102. Reducer;

[0033] 103. Coupling;

[0034] 104. Driving planetary gear;

[0035] 105, main gear;

[0036] 106. Follower planetary gear;

[0037] 107. Pre-rotation nozzle shaft;

[0038] 108. Main gear bearing;

[0039] 109. Main gear bearing locking nut;

[0040] 110a, left support plate of pre-spin channel;

[0041] 110b, right support plate of pre-spin channel;

[0042] 111, pre-spin channel;

[0043] 112. Cascade type pre-swirl nozzle;

[0044] 113. Pre-spin cavity;

[0045] 114a, inner sealed comb teeth;

[0046] 114b, inner sealing grate teeth sealing ring;

[0047] 115a, externally sealed comb teeth;

[0048] 115b, external sealing grate teeth sealing ring;

[0049] 116, receiving hole;

[0050] 117, drum shaft;

[0051] 118, cover cavity;

[0052] 119, cover plate;

[0053] 120, turbine disc;

[0054] 121. Blade air supply hole;

[0055] 122. Turbine guide vanes;

[0056] 123. Turbine rotor blades;

[0057] 124. Throat. DETAILED DESCRIPTION

[0058] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present invention and the features therein can be combined with each other without conflict.

[0059] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0060] The following describes in detail, with reference to the accompanying drawings, a planetary gear-based radially adjustable pre-swirl system nozzle adjustment assembly according to an embodiment of the present invention. This planetary gear-based radially adjustable pre-swirl system nozzle adjustment assembly is positioned between the engine rotor and turbine blades, providing cooling for the turbine blades. The engine may be an aircraft engine.

[0061] like Figures 1 to 4 As shown, according to an embodiment of the present invention, a planetary gear-based radially adjustable pre-swirl system nozzle adjustment assembly is provided, comprising a pre-swirl system, a transmission module, and a drive module for driving the pre-swirl nozzle adjustment in the pre-swirl system, wherein:

[0062] The pre-swirl system includes: inner sealing grate teeth 114a and outer sealing grate teeth 115a arranged around the outer circumference of the engine rotor and axially from the inside to the outside, a receiving hole 116 formed between the inner sealing grate teeth 114a and the outer sealing grate teeth 115a, inner sealing grate teeth sealing rings 114b and outer sealing grate teeth sealing rings 115b respectively arranged around the outer circumference of the inner sealing grate teeth 114a and the outer sealing grate teeth 115a and axially from the inside to the outside, a pre-swirl cavity 113 formed between the inner sealing grate teeth sealing rings 114b and the outer sealing grate teeth sealing rings 115b, a pre-swirl channel left support plate 110a and a pre-swirl channel right support plate 110b extending radially outward from the pre-swirl cavity 113 and spaced apart in the axial direction, and a pre-swirl channel left support plate 110a and a pre-swirl channel right support plate 110b extending radially outward from the pre-swirl cavity 113. a pre-swirl channel 111 between the pre-swirl channel left support plate 110a and the pre-swirl channel right support plate 110b, a plurality of cascade-type pre-swirl nozzles 112 circumferentially distributed between the pre-swirl channel left support plate 110a and the pre-swirl channel right support plate 110b, a pre-swirl nozzle rotating shaft 107 connected to each pre-swirl nozzle 112, a cover plate 119 arranged on the outer side of the pre-swirl channel right support plate 110b, a turbine disk 120 mounted on the outer side of the cover plate 119, a cover plate cavity 118 formed between the cover plate 119 and the turbine disk 120, and a blade air supply hole 121 formed in the turbine disk 120, the cover plate cavity 118 being communicated with the receiving hole 116, the blade air supply hole 121 including an inner end communicating with the cover plate cavity (118) and an outer end communicating with the turbine blade;

[0063] The transmission module includes a main gear bearing 108 mounted to the outer periphery of the inner sealing grate sealing ring 114b, a main gear 105 mounted on the main gear bearing 108, a driving planetary gear 104 meshing with the inner part of the ring gear of the main gear 105, a plurality of follower planetary gears 106 meshing with the inner part and the outer part of the ring gear of the main gear 105, and a main gear bearing locking nut 109 mounted on the inner side of the main gear bearing 108, wherein the inner side of the driving planetary gear 104 is connected to the driving module, and the outer side is connected to the pre-rotation nozzle shaft 107, and each of the other follower planetary gears 106 is respectively connected to each pre-rotation nozzle shaft 107.

[0064] In this embodiment, the drive module may include: a drive motor 101, a reducer 102, and a coupling 103 connected in series, wherein the reducer 102 and the coupling 103 are connected in series to the output shaft of the drive motor 101 to be driven thereby, wherein the drive planetary gear 104 connected to the drive module is connected to the coupling 103 of the drive module. The rotating shaft of the drive motor 101 may be arranged to be parallel to the axial direction of the transmission rotor.

[0065] In this embodiment, the drive motor 101 provides power for adjusting the pre-swirl nozzle 112. The pre-swirl chamber 113 is located at the radially inward outlet of the pre-swirl channel 111. The receiving hole 116 receives the airflow from the pre-swirl chamber 113. The inner sealing grate 114a and the inner sealing grate sealing ring 114b are arranged opposite to each other in a radial direction perpendicular to the axial direction, and the outer sealing grate 115a and the outer sealing grate sealing ring 115b are arranged opposite to each other in a radial direction perpendicular to the axial direction. The pre-swirl chamber 113 is formed by the annular space between the pre-swirl channel 111 and the inner sealing grate 114a and the outer sealing grate 115a.

[0066] In this embodiment, 24 pre-swirl nozzles 112 are evenly distributed around the circumference of the left support plate 110a and the right support plate 110b of the pre-swirl channel, and corresponding pre-swirl nozzle shafts 107 are connected to each pre-swirl nozzle 112. It should be understood that a greater or lesser number of pre-swirl nozzles 112 can be provided as needed. One of the pre-swirl nozzle shafts 107 receives drive from the drive motor 101 via the drive planetary gear 104, the reducer 102, and the coupling 103 to drive the drive planetary gear 104 and a pre-swirl nozzle 112 connected to the pre-swirl nozzle shaft 107 to rotate. The drive planetary gear 104 meshes with the inner portion of the ring gear of the main gear 105, driving the main gear 105 to rotate, thereby driving the other follower planetary gears 106 meshed with the main gear 105 to rotate, and further driving the other pre-swirl nozzles 112 connected to the other follower planetary gears 106 to rotate, thereby achieving synchronous adjustment of all pre-swirl nozzles 112. The driving planetary gear 104 and the following planetary gear 106 together constitute the planetary gears in the transmission module.

[0067] like Figures 1 to 4 As shown, in this embodiment, a main gear 105 is provided and mounted on a main gear bearing 108. Optionally, 23 follower planetary gears 106 may be provided. Since there is only one driving planetary gear 104, the total number of driving planetary gears 104 and follower planetary gears 106 is the same as the number of adjustable pre-swirl nozzles 112. Figures 2 to 4 As shown, except for the indicated driving planetary gear 104, the remaining planetary gears surrounding the main gear 105 are all follower planetary gears. The driving planetary gear 104 and the follower planetary gear 106 may have the same parameters such as radial size, axial thickness and number of teeth.

[0068] like Figure 4 As shown, in order to ensure the meshing transmission of the driving planetary gears 104 and the follower planetary gears 106 with the main gear 105, the driving planetary gears 104 and the follower planetary gears 106 are arranged in two rows in the axial direction, and are staggered with each other, and meshed with the main gear 105 in a staggered manner in the circumferential direction. In other words, the thickness of the main gear 105 is greater than the sum of the thicknesses of the driving planetary gears 104 and the follower planetary gears 106, so that one driving planetary gear 104 can be arranged to mesh with the inner part of the ring gear of the main gear 105, 11 follower planetary gears 106 can be arranged to mesh with the inner part of the ring gear of the main gear 105, and 12 follower planetary gears 106 can be arranged to mesh with the outer part of the ring gear of the main gear 105. Figure 1 and Figure 4As shown, the inner portion of the ring gear of the main gear 105 is the left portion of the ring gear of the main gear 105, while the outer portion is the right portion of the ring gear. The gears in the driving planetary gears 104 and the follower planetary gears 106 do not mesh with each other and do not interfere with each other. The driving planetary gears 104 may have an extended protruding connection portion formed on their inner sides for connection to the coupling 103.

[0069] The number of teeth and radius of the main gear 105, the driving planetary gears 104, and the follower planetary gears 106 meet gear transmission design principles. For example, in one exemplary embodiment, the rotation axis radius of the driving planetary gears 104 and the follower planetary gears 106 can be set to 155mm, with 18 teeth, a pitch circle diameter of 10mm, and a thickness of 4mm. The total number of these 24 cascade-type pre-swirl nozzles 112 matches the number of cascade-type pre-swirl nozzles. The main gear 105's rotation axis is coaxial with the engine rotor, with 432 teeth, a pitch circle diameter of 140mm, a thickness of 10mm, and a single cascade-type pre-swirl nozzle. The driving force of the drive motor 101 driving the pre-swirl nozzle 112 is greater than the aerodynamic and mechanical resistance during the adjustment process of the pre-swirl nozzle 112.

[0070] Each of the driving planetary gears 104 and the follower planetary gears 106 is connected to a pre-swirl nozzle shaft 107 at the head of a cascade-type pre-swirl nozzle 112. Thus, through a single pre-swirl nozzle shaft 107 connected to the output of the drive motor 101, the other cascade-type pre-swirl nozzles 112 are driven to rotate via the driving planetary gears 104 and follower planetary gears 106 of the transmission module and the main gear 105, achieving an angle adjustment range of 10° to 20° for the pre-swirl nozzles 112.

[0071] from Figure 1 Observation on the middle right side, and reference Figure 2 When the planetary gear 104 is driven to rotate clockwise, the main gear 105 rotates counterclockwise, driving the follower planetary gear 106 to rotate clockwise, and the pre-swirl nozzle 112 rotates clockwise accordingly, the area of ​​the cascade pre-swirl channel throat 124 increases, and the airflow rate increases. Figure 3 As shown, when the driving planetary gear 104 rotates counterclockwise, the main gear 105 rotates clockwise, driving the follower planetary gear 106 to rotate counterclockwise, and the pre-swirl nozzle 112 rotates counterclockwise accordingly, the area of ​​the cascade type pre-swirl channel throat 124 decreases, and the airflow rate decreases.

[0072] like Figure 1As shown, the cascade pre-swirl channel 111 is surrounded by left and right pre-swirl channel support plates 110a and 110b. The radial outer side of the cascade pre-swirl channel 111 communicates with the turbine guide vanes 122 to receive cooling air, and the radial inner side of the cascade pre-swirl channel 111 communicates with the pre-swirl cavity 113. The turbine guide vanes 122 are located radially on the outer periphery of the pre-swirl channel 111. The cover plate 119 and the inner sealing grate 114a, outer sealing grate 115a, inner sealing grate sealing ring 114b, and outer sealing grate sealing ring 115b together surround and form the pre-swirl cavity 113 for collecting cooling air passing through the cascade pre-swirl channel 111. The inner sealing grate 114a, the outer sealing grate 115a and the cover plate 119 can be an integrally formed component, wherein the inner sealing grate 114a and the outer sealing grate 115a of the component partially extend along the axial direction, and the cover plate 119 partially turns to expand outward in a radial direction perpendicular to the axial direction to cover the pre-swirl system. The above-mentioned sealing structure can be used to prevent the gas in the pre-swirl chamber 113 from leaking inward or outward. The inner sealing grate sealing ring 114b and the left support plate 110a of the pre-swirl channel can be formed in one piece, wherein the inner sealing grate sealing ring 114b extends from the inside to the outside along the axial direction, and the left support plate 110a of the pre-swirl channel turns to expand outward in a radial direction perpendicular to the axial direction. The outer sealing grate sealing ring 115b and the right support plate 110b of the pre-swirl channel can be formed integrally, wherein the outer sealing grate sealing ring 115b extends from outside to inside along the axial direction, and the right support plate 110b of the pre-swirl channel turns to expand outward in a radial direction perpendicular to the axial direction.

[0073] In this embodiment, the airflow path formed by the planetary gear-based radially adjustable pre-swirl system nozzle adjustment assembly provided in this embodiment is as follows: cooling air from turbine guide vanes 122 passes through cascade pre-swirl channels 111 and enters pre-swirl chamber 113 via throat 124 between pre-swirl nozzles 112. Except for a small amount of cooling air leaking through inner sealing grate teeth 114a and outer sealing grate teeth 115a, the majority of the cooling air enters cover plate chamber 118 through receiving holes 116. The cooling air in cover plate chamber 118 enters turbine blades 123 through blade air supply holes 121 formed in turbine disk 120, cooling turbine blades 123. Cover plate chamber 118 is surrounded by cover plate disk 119, turbine disk 120 outside cover plate disk 119, and drum shaft 117. As described above, the area of ​​the throat 124 is adjusted by adjusting the rotation and angle of the pre-swirl nozzle 112 through the driving module and the transmission module, thereby adjusting the flow rate of the cooling air passing therethrough, thereby providing a cooling function for the turbine blades 123 as needed.

[0074] According to an embodiment of the present invention, a planetary gear-based radially adjustable pre-swirl system nozzle adjustment assembly is provided. The assembly is powered by a drive motor 101, which controls the angle of the pre-swirl nozzle 112 by driving a planetary gear 104 and a follower planetary gear 106, thereby changing the throttling area of ​​the pre-swirl channel 111 and the flow rate through the pre-swirl system.

[0075] Figure 5 This is a schematic diagram of an example of the application of the present invention, showing the change of the relative flow rate of cooling gas with the pre-swirl angle. Under the condition of a pre-swirl system pressure ratio of 1.9, the pre-swirl angle decreases from 20° to 12°, and the pre-swirl system flow rate decreases by 55%.

[0076] Compared with the prior art, the embodiment of the present invention provides a radially adjustable pre-swirl system nozzle adjustment assembly based on planetary gears. By driving the planetary gears with a motor, the adjustment accuracy of the pre-swirl nozzle angle can reach 0.1°, thereby achieving higher flow rate adjustment accuracy. Figure 6 As shown, in one example using the present invention, the flow rate regulation deviation of the planetary gear adjustment method is less than 1%, while the flow rate regulation deviation of existing adjustment methods is closer to 10%. In addition, adjusting the angle of the cascade pre-swirl nozzle using hydraulic actuators requires 12 sets of actuators, making it difficult to ensure synchronous and consistent adjustment. The cascade pre-swirl nozzle adjustment assembly provided by the present invention uses a single motor to provide adjustment power, and is driven by planetary gear meshing, ensuring synchronous adjustment. Figure 7 The existing adjustment method and the planetary gear-based adjustment method of the present invention are given as examples. The absolute values ​​of the maximum differences in the pre-swirl nozzle angles at different positions are compared. The results show that the synchronization of the blade-type pre-swirl nozzle adjustment using planetary gears is better than that of the existing adjustment method.

[0077] All of the above optional technical solutions can be combined in any way to form optional embodiments of the present application, and will not be described in detail here.

[0078] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0079] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A radially adjustable pre-swirl system nozzle adjustment assembly based on planetary gears, which is arranged between the engine rotor and the turbine blades and is responsible for cooling the turbine blades. It is characterized by: The invention comprises a pre-swirl system, a transmission module, and a drive module for driving the pre-swirl nozzle in the pre-swirl system to adjust the pre-swirl nozzle, wherein: The pre-swirl system comprises: inner sealing grate teeth (114a) and outer sealing grate teeth (115a) arranged around the outer periphery of the engine rotor and in the axial direction from the inner side to the outer side, a receiving hole (116) formed between the inner sealing grate teeth (114a) and the outer sealing grate teeth (115a), and a receiving hole (116) formed between the inner sealing grate teeth (114a) and the outer sealing grate teeth (115a). An inner sealing grate sealing ring (114b) and an outer sealing grate sealing ring (115b) are arranged on the side, a pre-swirl chamber (113) is formed between the inner sealing grate sealing ring (114b) and the outer sealing grate sealing ring (115b), a pre-swirl channel left support plate (110a) and a pre-swirl channel right support plate (110b) are radially extended outward from the pre-swirl chamber (113) and are spaced apart in the axial direction, A pre-swirl channel (111) between a left channel support plate (110a) and a right pre-swirl channel support plate (110b), a plurality of cascade-type pre-swirl nozzles (112) circumferentially distributed in the pre-swirl channel (111), a pre-swirl nozzle rotating shaft (107) respectively connected to each pre-swirl nozzle (112), a cover plate (119) disposed on the outside of the right pre-swirl channel support plate (110b), a turbine disk (120) mounted on the outside of the cover plate (119), a cover plate cavity (118) formed between the cover plate (119) and the turbine disk (120), and a blade air supply hole (121) formed in the turbine disk (120), the cover plate cavity (118) being in communication with the receiving hole (116), the blade air supply hole (121) comprising an inner end in communication with the cover plate cavity (118) and an outer end in communication with the turbine blade; The transmission module comprises: a main gear bearing (108) mounted on the outer periphery of the inner sealing grate sealing ring (114b), a main gear (105) mounted on the main gear bearing (108), a driving planetary gear (104) meshed with the inner portion of the gear ring of the main gear (105), and a plurality of follower planetary gears (106) meshed with the inner and outer portions of the gear ring of the main gear (105), wherein each of the driving planetary gear (104) and the follower planetary gear (106) is respectively connected to each pre-rotation nozzle rotating shaft (107), and the driving planetary gear (104) is connected to the driving module, so that the driving module drives the pre-rotation nozzle rotating shaft (107) connected to the driving planetary gear (104) via the driving planetary gear (104).

2. The planetary gear-based radially adjustable pre-swirl system nozzle adjustment assembly according to claim 1, characterized in that: The driving module comprises: a driving motor (101), a reducer (102) and a coupling (103) connected in series, wherein the reducer (102) and the coupling (103) are connected in series to the output shaft of the driving motor (101) to be driven thereby, wherein the rotating shaft of the driving motor (101) is parallel to the axial direction of the transmission rotor; The driving planetary gear (104) connected to the driving module is connected to the coupling (103) of the driving module.

3. The planetary gear-based radially adjustable pre-swirl system nozzle adjustment assembly according to claim 2, characterized in that: The sum of the number of the driving planetary gears (104) and the follower planetary gears (106) is the same as the number of the pre-swirl nozzles (112).

4. The planetary gear-based radially adjustable pre-swirl system nozzle adjustment assembly according to claim 3, characterized in that: The number of the pre-spin nozzles (112) and the number of the pre-spin nozzle rotating shafts (107) are both 24, and the number of the follower planetary gears (106) is 23, so that the sum of the number of the driving planetary gears (104) and the follower planetary gears (106) is equal to the number of the pre-spin nozzles (112).

5. The planetary gear-based radially adjustable pre-swirl system nozzle adjustment assembly according to claim 3 or 4, characterized in that: Half of the driving planetary gears (104) and the following planetary gears (106) are arranged on the inner portion of the gear ring of the main gear (105), and the other half of the planetary gears are arranged on the outer portion of the gear ring of the main gear (105).

6. The planetary gear-based radially adjustable pre-swirl system nozzle adjustment assembly according to claim 5, characterized in that: The driving planetary gears (104) and the following planetary gears (106) are arranged alternately on the outer periphery of the main gear (105), and are arranged so that there is no meshing relationship between the respective gears in the driving planetary gears (104) and the following planetary gears (106).

7. The planetary gear-based radially adjustable pre-swirl system nozzle adjustment assembly according to claim 2, characterized in that: The driving planetary gear (104) is formed with an extended protruding connection portion on the inner side thereof for connection with the coupling (103).

8. The planetary gear-based radially adjustable pre-swirl system nozzle adjustment assembly according to claim 1, characterized in that: The transmission module further comprises a main gear bearing locking nut (109) mounted on the inner side of the main gear bearing (108).

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