Radial adjustable pre-rotation system nozzle adjusting assembly based on planetary gear

Abstract

The invention relates to a radial adjustable pre-rotation system nozzle adjusting assembly based on a planetary gear, belongs to the technical field of aero-engine pre-rotation, and solves the problems that in the prior art, an engine cooling gas adjusting mode needs a complex driving device, and accurate synchronous control over a pre-rotation system is difficult to achieve. Comprising a main gear bearing, a main gear mounted on the main gear bearing, a driving planetary gear meshed with the inner side part of a gear ring of the main gear, and a transmission module connected with the driving planetary gear, the driving planetary gear is meshed with the driving module, the follow-up planetary gears are meshed with the inner side part and the outer side part of a gear ring of the main gear, each of the driving planetary gear and the follow-up planetary gears is connected with each pre-rotation nozzle rotating shaft, and the driving planetary gear is connected with the driving module; therefore, the driving module drives the pre-rotation nozzle rotating shaft connected with the driving planetary gear through 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 regulating component based on planetary gears. Background Art

[0002] The pre-swirl system is an important component of the secondary air system of aircraft engines. Through reasonable design, the relative total temperature of the cooling air can be effectively reduced and the performance of the pre-swirl system can be improved. The characteristics of the future aircraft engines with variable cycle characteristics are particularly significant in that the air intake requirements in different states vary greatly. Excessive pre-swirl system air intake will increase 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 complicated, which will cause the boundary combination of the air system to become more complicated and the degree of discretization of the air path parameters to increase. When the main channel components are adjusted with variable geometry, the fixed geometry pre-swirl system configuration design ensures the normal realization of functions such as cooling, wheel rim sealing, and axial force control within a wider envelope, which faces tremendous pressure. The pre-swirl system adjustment technology has extremely high application potential in future aircraft engines.

[0003] However, the existing cooling air regulation method requires the use of a complex driving device and is difficult to achieve precise synchronous control of the pre-swirl system. Therefore, in the technical field, there is a need for a regulation method with a simple structure for synchronously and precisely controlling the pre-swirl system of an aircraft engine. Summary of the invention

[0004] In response to the problem of how to implement the adjustment of the preswirl system of future aircraft engines, the present invention provides a radially adjustable preswirl system nozzle adjustment component based on planetary gears, which realizes the synchronous adjustment of the blade-type preswirl nozzle through the meshing transmission of the planetary gear device, thereby controlling the flow and pressure of the preswirl system.

[0005] According to one embodiment of the present invention, a radially adjustable pre-swirl system nozzle adjustment assembly based on a planetary gear is provided, which is arranged between an engine rotor and a turbine blade and undertakes the cooling function of the turbine blade. It is characterized in that it includes a pre-swirl system, a transmission module, and a driving module for driving the pre-swirl nozzle adjustment in the pre-swirl system, wherein:

[0006] The pre-swirl system comprises: 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 teeth sealing ring and an outer sealing grate teeth sealing ring 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, respectively, a pre-swirl cavity formed between the inner sealing grate teeth sealing ring and the outer sealing grate teeth sealing ring, a pre-swirl channel left support plate and a pre-swirl channel left support plate extending radially outward from the pre-swirl cavity and arranged at intervals in the axial direction. a right support plate of the pre-swirl channel, a pre-swirl channel between the left support plate of the pre-swirl channel and the right support 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 connected to each pre-swirl nozzle, a cover plate disk arranged on the outer side of the right support plate of the pre-swirl channel, a turbine disk mounted on the outer side to 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 installed to the outer periphery of the inner sealing comb teeth sealing ring, a main gear installed on the main gear bearing, a driving planetary gear meshing with the inner part of the gear ring of the main gear, and a plurality of follower planetary gears meshing with the inner and outer parts of the gear ring of the main gear, wherein each of the driving planetary gear and the follower planetary gear is respectively connected to each pre-rotation nozzle shaft, and the driving planetary gear is 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 shafts is 24, and the number of the follower planetary gears is 23, so that the sum of the number of the driving planetary gears and the follower planetary gears is equal to the number of the 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 gear ring of the main gear, and the other half of the planetary gears are arranged on the outer part of the gear ring 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 with a coupling.

[0014] In an optional embodiment, the transmission module further comprises 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 component is provided, comprising 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, wherein 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 meshes with the main gear, driving the main gear to rotate, thereby driving the follower planetary gear and the blade-type pre-swirl nozzle connected thereto, 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 of the pre-swirl nozzle adjustment process.

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

[0018] Furthermore, in order to ensure the meshing transmission between the planetary gears and the main gear, the planetary gears are arranged in two rows in an axial direction, with 12 planetary gears in each row. There is no meshing relationship between the planetary gears and no interference with each other.

[0019] Compared with the prior art, a radially adjustable pre-swirl system nozzle adjustment assembly based on a planetary gear provided according to 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 the planetary gears. Compared with the adjustment method using multiple sets of drive devices, the synchronization of the adjustment is greatly improved.

[0021] 2. The compact layout of the blade-type pre-swirl nozzle adjustment assembly is achieved through two rows of staggered planetary gears in the axial direction. At the same time, the gear transmission adjustment method has high reliability and adjustment accuracy, and the adjustment accuracy of the pre-swirl nozzle angle can reach 0.1°, thereby stably and accurately controlling the pre-swirl system to provide appropriate 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 drawings required for use in the embodiments will be briefly introduced below. The features and advantages of the present invention can be more clearly understood by referring to the drawings. 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 creative work.

[0023] Figure 1 It is a 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 It is a schematic diagram of the angle reduction adjustment of the cascade type adjustable pre-swirl nozzle of the planetary gear-based radially adjustable pre-swirl system nozzle adjustment assembly according to an embodiment of the present invention.

[0026] Figure 4 A schematic diagram of the arrangement layout and meshing relationship of planetary gears of a radially adjustable pre-swirl system nozzle adjustment assembly 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 a planetary gear provided according to an embodiment of the present invention.

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

[0029] Figure 7 A schematic diagram for comparing the synchronization 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 an existing adjustment method.

[0030] Reference numerals:

[0031] 101. Driving 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 chamber;

[0045] 114a, internally sealed comb teeth;

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

[0047] 115a, externally sealed comb teeth;

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

[0049] 116, receiving hole;

[0050] 117, drum shaft;

[0051] 118, cover plate 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 purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments 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, but the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0060] A radially adjustable pre-swirl system nozzle adjustment assembly based on planetary gears according to an embodiment of the present invention is described in detail below with reference to the accompanying drawings. The radially adjustable pre-swirl system nozzle adjustment assembly based on planetary gears is arranged between the engine rotor and the turbine blades, and is responsible for the cooling function of the turbine blades. The engine may be an aircraft engine.

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

[0062] The pre-swirl system includes: an inner sealing grate 114a and an outer sealing grate 115a which are 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 114a and the outer sealing grate 115a, an inner sealing grate sealing ring 114b and an outer sealing grate sealing ring 115b which are arranged around the outer circumference of the inner sealing grate 114a and the outer sealing grate 115a and axially from the inside to the outside, a pre-swirl cavity 113 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 which extend radially outward from the pre-swirl cavity 113 and are spaced apart in the axial direction, and a receiving hole 116 formed between the inner sealing grate 114a and the outer sealing grate 115a. 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 respectively connected to each pre-swirl nozzle 112, a cover plate disk 119 arranged on the outer side of the pre-swirl channel right support plate 110b, a turbine disk 120 mounted on the cover plate disk 119 on the outer side, a cover plate cavity 118 formed between the cover plate disk 119 and the turbine disk 120, and a blade air supply hole 121 formed in the turbine disk 120, the cover plate cavity 118 is connected to the receiving hole 116, and the blade air supply hole 121 includes an inner end connected to the cover plate cavity (118) and an outer end connected to the turbine blade;

[0063] The transmission module includes a main gear bearing 108 installed on the outer periphery of the inner sealing comb teeth sealing ring 114b, a main gear 105 installed on the main gear bearing 108, a driving planetary gear 104 meshing with the inner part of the gear ring of the main gear 105, a plurality of follower planetary gears 106 meshing with the inner part and the outer part of the gear ring of the main gear 105, and a main gear bearing locking nut 109 installed 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 driving module may include: a driving motor 101, a reducer 102 and a coupling 103 connected in sequence, wherein the reducer 102 and the coupling 103 are connected in sequence to the output shaft of the driving motor 101 to be driven thereby, wherein the driving planetary gear 104 connected to the driving module is connected to the coupling 103 of the driving module. The rotating shaft of the driving 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 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 teeth 114a and the inner sealing grate teeth sealing ring 114b are arranged oppositely in the radial direction perpendicular to the axial direction, and the outer sealing grate teeth 115a and the outer sealing grate teeth sealing ring 115b are arranged oppositely in the radial direction perpendicular to the axial direction. The pre-swirl chamber 113 is composed of the annular space between the pre-swirl channel 111 and the inner sealing grate teeth 114a and the outer sealing grate teeth 115a.

[0066] In this embodiment, 24 pre-swirl nozzles 112 are evenly distributed on the circumference of the left support plate 110a and the right support plate 110b of the pre-swirl channel, and the pre-swirl nozzle shafts 107 are respectively connected to the pre-swirl nozzles 112. It should be understood that more or less pre-swirl nozzles 112 can be set 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, and the drive planetary gear 104 is meshed with the inner part 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 then driving the other pre-swirl nozzles 112 connected to the other follower planetary gears 106 to rotate, so as to achieve 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 around the main gear 105 are all follower planetary gears. The driving planetary gear 104 and the follower planetary gear 106 may have the same radial size, axial thickness, number of teeth and other parameters.

[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 gear ring of the main gear 105, 11 follower planetary gears 106 can be arranged to mesh with the inner part of the gear ring of the main gear 105, and 12 follower planetary gears 106 can be arranged to mesh with the outer part of the gear ring of the main gear 105. Figure 1 and Figure 4As shown, the inner part of the gear ring of the main gear 105 is the left part of the gear ring of the main gear 105 shown in the figure, and the outer part of the gear ring is the right part of the gear ring. The gears in the driving planetary gear 104 and the follower planetary gear 106 are not meshed with each other and do not interfere with each other. The driving planetary gear 104 may be formed with an extended protruding connection portion on the inner side for connecting with the coupling 103.

[0069] The number of teeth and radius of the main gear 105, the driving planetary gear 104 and the follower planetary gear 106 meet the gear transmission design principle. For example, in an exemplary embodiment, the rotation axis radius of the driving planetary gear 104 and the follower planetary gear 106 can be set to 155mm, the number of teeth is 18, the pitch circle diameter is 10mm, the thickness is 4mm, the number is 24 in total and the number is consistent with the number of the cascade type pre-swirl nozzle 112; the main gear 105 rotation axis is coaxial with the engine rotor, the number of teeth is 432, the pitch circle diameter is 140mm, the thickness is 10mm, and the number is 1. The driving force of the drive motor 101 to drive the pre-swirl nozzle 112 is greater than the aerodynamic resistance and mechanical resistance of the pre-swirl nozzle 112 adjustment process.

[0070] Each gear in the driving planetary gear 104 and the follower planetary gear 106 is respectively connected to a pre-swirl nozzle rotating shaft 107 at the head of a cascade type pre-swirl nozzle 112. Thus, through a pre-swirl nozzle rotating shaft 107 connected to the output of the driving motor 101, through the driving planetary gear 104 and the follower planetary gear 106 of the transmission module and the main gear 105, the other cascade type pre-swirl nozzles 112 are driven to rotate, and the angle of the pre-swirl nozzle 112 can be adjusted within a range of 10° to 20°.

[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 type 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 is reduced, and the airflow rate is reduced.

[0072] like Figure 1As shown, the cascade type pre-swirl channel 111 is surrounded by the pre-swirl channel support plates 110a and 110b on the left and right sides, and the radial outer side of the cascade type pre-swirl channel 111 is connected to the turbine guide vane 122 to receive the cooling air, and the radial inner side of the cascade type pre-swirl channel 111 is connected to the pre-swirl cavity 113. The turbine guide vane 122 is located at the radial outer periphery of the pre-swirl channel 111. The cover plate 119 and the inner sealing grate teeth 114a, the outer sealing grate teeth 115a, the inner sealing grate teeth sealing ring 114b, and the outer sealing grate teeth sealing ring 115b together surround and form the pre-swirl cavity 113 for collecting the cooling air passing through the cascade type pre-swirl channel 111. The inner sealing grate teeth 114a, the outer sealing grate teeth 115a and the cover plate 119 can be an integrally formed component, wherein the inner sealing grate teeth 114a and the outer sealing grate teeth 115a of the component extend in the axial direction, and the cover plate 119 part turns to expand outward in the 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 and outward. The inner sealing grate teeth 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 teeth 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 the radial direction perpendicular to the axial direction. The outer sealing comb teeth sealing ring 115b and the right support plate 110b of the pre-swirl channel can be formed integrally, wherein the outer sealing comb teeth sealing ring 115b extends from the outside to the 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: the cooling air from the turbine guide vane 122 passes through the cascade type pre-swirl channel 111, and enters the pre-swirl chamber 113 through the throat 124 between the pre-swirl nozzles 112. Except for a small amount of cooling air leaking through the inner sealing grate teeth 114a and the outer sealing grate teeth 115a, most of the cooling air enters the cover plate chamber 118 through the receiving hole 116. The cooling air in the cover plate chamber 118 enters the turbine blade 123 through the blade air supply hole 121 formed in the turbine disk 120 and cools the turbine blade 123. The cover plate chamber 118 is surrounded by the cover plate disk 119, the turbine disk 120 outside the cover plate disk 119, and the 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 radially adjustable pre-swirl system nozzle adjustment component based on a planetary gear is provided, which is powered by a driving motor 101, and controls the angle of the pre-swirl nozzle 112 by driving the planetary gear 104 and the 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 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 is reduced from 20° to 12°, and the pre-swirl system flow rate is reduced by 55%.

[0076] Compared with the prior art, the embodiment of the present invention provides a radially adjustable pre-swirl system nozzle adjustment component 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 an example of applying the present invention, the flow regulation deviation of the planetary gear regulation method is ≯1%, and the flow regulation deviation of the existing regulation method is close to 10%. In addition, adjusting the angle of the cascade type pre-swirl nozzle by a hydraulic actuating mechanism requires 12 sets of actuating mechanisms, which makes it difficult to ensure the synchronization and consistency of the adjustment. The cascade type pre-swirl nozzle adjustment assembly provided by the present invention provides adjustment power through a motor and is driven by planetary gear meshing, which can ensure the synchronization of the adjustment. Figure 7 The existing adjustment method and the planetary gear-based adjustment method of the example of applying the present invention are given, and the absolute values ​​of the maximum difference of the pre-swirl nozzle angles at different positions are compared. The results show that the synchronization of the blade-type pre-swirl nozzle adjustment by the planetary gear is better than the existing adjustment method.

[0077] All the above optional technical solutions can be arbitrarily combined to form optional embodiments of the present application, which will not be described one by one here.

[0078] It should be understood that the order of execution of the steps in the above embodiment does not necessarily 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 embodiment of the present invention.

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

Claims

1. A radially adjustable pre-swirl system nozzle adjustment assembly based on planetary gears, arranged between the engine rotor and the turbine blades, and assuming the cooling function of the turbine blades, characterized in that: It includes a pre-spin system, a transmission module, and a driving module for driving the pre-spin nozzle in the pre-spin system to adjust, wherein: The pre-swirl system comprises: inner sealing grate teeth (114a) and outer sealing grate teeth (115a) arranged around the outer circumference of the engine rotor and axially 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 around the outer circumference of the inner sealing grate teeth (114a) and the outer sealing grate teeth (115a) and axially from the inner side to the outer side. An inner sealing grate tooth sealing ring (114b) and an outer sealing grate tooth sealing ring (115b) are arranged on the side of the pre-swirl chamber (113), a pre-swirl channel left support plate (110a) and a pre-swirl channel right support plate (110b) are formed between the inner sealing grate tooth sealing ring (114b) and the outer sealing grate tooth sealing ring (115b), and the pre-swirl channel extends radially outward from the pre-swirl chamber (113) and is arranged at intervals 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 disc (119) arranged on the outer side of the right pre-swirl channel support plate (110b), a turbine disc (120) mounted on the outer side of the cover plate disc (119), a cover plate cavity (118) formed between the cover plate disc (119) and the turbine disc (120), and a blade air supply hole (121) formed in the turbine disc (120), the cover plate cavity (118) being connected to the receiving hole (116), and the blade air supply hole (121) comprising an inner end connected to the cover plate cavity (118) and an outer end connected to the turbine blade; The transmission module comprises: a main gear bearing (108) mounted on the outer periphery of an inner sealing comb tooth 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 sequence, wherein the reducer (102) and the coupling (103) are connected in sequence 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 rotor of the transmission; 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 number of 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 follower planetary gears (106) are arranged on the inner part of the gear ring of the main gear (105), and the other half of the planetary gears are arranged on the outer part 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 follower planetary gears (106) are arranged alternately with each other on the outer periphery of the main gear (105), and are arranged so that there is no meshing relationship between the gears in the driving planetary gears (104) and the follower 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, which is used for connecting 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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