Stator assembly and gas compressor
By designing plug-ins, flanges and groove structures in the static component, the problem of inconvenient decomposition between the static vane and the rear-stage receiver is solved, and the correct separation between the static vane and the rear-stage receiver is achieved, avoiding the static vane and the rotor impacting the rotor and protecting the engine assembly.
Patent Information
- Application Number
- CN202422027909.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-20
AI Technical Summary
When decomposing the compressor of the aircraft engine, it is difficult to separate the static vane from the rear stage receiver, resulting in the separation of the static vane from the front stage receiver. The static vane then moves axially backward until it hits the rotor, causing damage to the rotor and the static vane.
A static component is designed, including static blades, front receivers, rear receivers and plug-ins. By setting the front and rear flanges on the mounting seat of the stator blades and setting corresponding grooves and plug-in structures on the front and rear receivers, the plug-in prevents the front flanges from breaking out of the front grooves, thereby fixing the stator blades and preventing them from being separated from the front receivers.
When decomposing the rear-stage receiver, the plug-in prevents the front flange from breaking out of the front groove, preventing the static cord blade from decomposing from the front-stage receiver, so that the rear-stage receiver and the static cord blade can be properly separated, preventing the static cord blade from hitting the rotor, and protecting the rotor and static cord blades.
Smart Images
Figure CN223035105U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of aero-engines, and particularly to a stator assembly and a compressor. Background Art
[0002] As Figure 1 shown, when assembling the compressor, the rotor is assembled first, and multiple stages of rotors are assembled into a whole, and then the front-stage casing, stator blades and rear-stage casing are installed step by step. When disassembling the compressor, the rear-stage casing is disassembled first, then the stator blades are disassembled, and then the front-stage casing is disassembled. Since the stator blades and the rear-stage casing will undergo slight deformation after the aero-engine operates, when disassembling the rear-stage casing, it is difficult to separate the rear-stage casing from the stator blades, and the disassembly force causes the stator blades to separate from the front-stage casing, and the stator blades move axially backward along with the rear-stage casing until the stator blades hit the rotor, resulting in damage to the rotor and the stator blades. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a stator assembly and a compressor, which are used to improve the inconvenient disassembly of the stator blades and the rear-stage casing.
[0004] In a first aspect, the utility model provides a stator assembly. According to an embodiment of the utility model, the stator assembly includes stator blades, a front-stage casing, a rear-stage casing and a plug; the stator blades are provided with a mounting seat on the outer peripheral side, the mounting seat is provided with a front flange on the front end face, and the mounting seat is provided with a rear flange on the rear end face; the front-stage casing is located on the front side of the stator blades and is provided with a front groove on the rear end face, and the front groove is inserted with the front flange to fix the stator blades; the rear-stage casing is located on the rear side of the stator blades and is provided with a rear groove on the front end face, and the rear groove is inserted with the rear flange to fix the stator blades; the plug is inserted into the outer peripheral side wall of the front groove and the front flange to prevent the front flange from coming out of the front groove.
[0005] In one or more embodiments, the rear-stage casing is provided with a front-extending side wall connecting the front-stage casing, the plug is arranged on the inner peripheral side of the front-extending side wall, and the front-extending side wall abuts against the plug to prevent the plug from coming out of the front flange.
[0006] In one or more embodiments, the rear-stage casing is provided with a front-extending side wall connecting the front-stage casing, the plug is arranged on the inner peripheral side of the front-extending side wall, and the length of the plug inserted into the front flange is greater than the distance from the plug to the front-extending side wall along the length direction, so as to prevent the plug from coming out of the front flange.
[0007] In one or more embodiments, the plug extends radially, and the radial length of the plug inserted into the front flange is greater than the radial distance from the plug to the front-extending side wall.
[0008] In one or more embodiments, the plug abuts against a portion of the front flange located on the front side of the plug to prevent the stator vane from colliding with the rear rotor.
[0009] In one or more embodiments, the distance from the plug to the portion of the front flange located on the front side of the plug is less than the distance from the stator vane to the rear rotor to prevent the stator vane from colliding with the rear rotor.
[0010] In one or more embodiments, both the front flange and the front groove extend axially, and the axial distance from the plug to the portion of the front flange located on the front side of the plug is less than the axial distance from the stator vane to the rear rotor.
[0011] In one or more embodiments, the plug includes a pin, a through hole is provided on the outer peripheral side wall of the front groove, a blind hole is provided on the outer peripheral side wall of the front flange, and the pin is inserted into the through hole and the blind hole.
[0012] In one or more embodiments, the pin and the through hole are in interference fit, and an annular groove is provided at the head of the pin.
[0013] In a second aspect, the present invention provides a compressor. According to an embodiment of the present invention, the compressor includes the above-mentioned stator assembly.
[0014] The embodiments of the present invention at least have the following beneficial effects:
[0015] When disassembling the rear-stage casing, the plug fixed on the outer peripheral side wall of the front groove blocks the front flange, preventing the front flange from disengaging backward from the front groove and preventing the stator vane from disassembling from the front-stage casing. The disassembly force thus causes the rear groove to disengage backward from the rear flange, and the rear-stage casing is disassembled from the stator vane, avoiding the situation where the stator vane disassembles from the front-stage casing prior to the rear-stage casing disassembling from the stator vane. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The above and other features, properties, and advantages of the present invention will become more apparent from the following description in conjunction with the drawings and embodiments, where:
[0017] Figure 1 is a cross-sectional view of a stator assembly and a compressor rotor of the prior art;
[0018] Figure 2 is a partial cross-sectional view of the stator assembly of the present invention;
[0019] Figure 3 is a front view of the pin.
[0020] Reference numerals:
[0021] 1 - front-stage casing;
[0022] 2 - Stator vane;
[0023] 3 - Rear casing;
[0024] 4 - Rotor;
[0025] 5 - Front flange;
[0026] 6 - Front groove;
[0027] 7 - Rear flange;
[0028] 8 - Rear groove;
[0029] 9 - Mounting seat;
[0030] 10 - Plug;
[0031] 11 - Pin;
[0032] 12 - Outer peripheral side wall of the front groove;
[0033] 13 - Front extending side wall of the rear casing;
[0034] 14 - Length of the plug inserted into the front flange;
[0035] 15 - Distance from the plug to the front extending side wall along the length direction;
[0036] 16 - Portion of the front flange located in front of the plug;
[0037] 17 - Distance from the plug to the portion of the front flange located in front of the plug;
[0038] 18 - Distance from the stator vane to the rear rotor;
[0039] 19 - Through hole;
[0040] 20 - Blind hole;
[0041] 21 - Annular groove. Detailed implementation mode
[0042] Now, reference will be made in detail to the embodiments of the present invention, one or more examples of which are shown in the drawings. Each example is provided to explain the present invention, not to limit the present invention. In fact, it will be obvious to those skilled in the art that various modifications and changes can be made to the present invention without departing from the scope or spirit of the present invention. For example, features shown or described as part of one embodiment can be used with another embodiment to produce yet another embodiment. Therefore, the present invention is intended to cover these modifications and changes that fall within the scope of the appended claims and their equivalents.
[0043] It should be noted that these and subsequent other drawings are only examples, and they are not drawn under the condition of equal proportion, and should not be used to limit the actual protection scope required by the present utility model.
[0044] Both the compressor stator and the compressor rotor are rotating bodies. Figure 1 The cross-sectional structure passing through the central axis of the compressor in the prior art is shown. As Figure 1 shown, in the compressor, the stator vane 2 and the front casing 1 are fixed by a front flange 5 and a front groove 6 inserted axially, and the stator vane 2 and the rear casing 3 are fixed by a rear flange 7 and a rear groove 8 inserted axially. The stator vane 2 is provided with a mounting seat 9 on the outer peripheral side, and the front flange 5 and the rear flange 7 are arranged on the mounting seat 9. When assembling the compressor, the rotor 4 is assembled first, and multiple-stage rotors 4 are assembled into a whole, and then the front casing 1, the stator vane 2 and the rear casing 3 are installed step by step axially. When disassembling the compressor, the rear casing 3 is disassembled axially first, then the stator vane 2 is disassembled axially, and then the front casing 1 is disassembled. Since the stator vane 2 and the rear casing 3 will undergo slight deformation after the aero-engine operates, when disassembling the rear casing 3 axially, it is difficult for the rear flange 7 and the rear groove 8 to disengage, and it is difficult for the rear casing 3 to separate from the stator vane 2. The disassembly force causes the front flange 5 and the front groove 6 to disengage axially, and the stator vane 2 separates from the front casing 1. The stator vane 2 moves axially rearward along with the rear casing 3 until the stator vane 2 impacts the rotor 4, resulting in damage to the rotor 4 and the stator vane 2. And since the stator vane 2 is covered by the rear casing 3 and the rear flange 7 is inaccessible, it is impossible to apply a force to the rear flange 7, resulting in the inability to disassemble the stator vane 2 and the rear casing 3.
[0045] Figure 2 The partial cross-sectional structure of the stator assembly of the present utility model is shown. Figure 2 The partial position shown is equivalent to Figure 1 at position A in Figure 1 and Figure 2 shown, the stator assembly includes a stator vane 2, a front casing 1 and a rear casing 3. "Front" is the incoming flow direction of air in the compressor, and "rear" is the outgoing flow direction of air in the compressor, the same hereinafter. The stator vane 2 is provided with a mounting seat 9 on the outer peripheral side. The mounting seat 9 is provided with a front flange 5 on the front end face, and the front flange 5 protrudes forward from the front end face of the mounting seat 9. The front flange 5 can be an annular wall protruding axially and extending circumferentially. "Circumferential" is the rotation direction of the compressor stator rotating body, the same hereinafter. "Axial" is the direction parallel to the central axis of the compressor, the same hereinafter. The mounting seat 9 is provided with a rear flange 7 on the rear end face, and the rear flange 7 protrudes backward from the rear end face of the mounting seat 9. The rear flange 7 can be an annular wall protruding axially and extending circumferentially.
[0046] As Figure 1 and Figure 2As shown, the front-stage casing 1 is located on the front side of the stator vane 2. The front-stage casing 1 is provided with a front groove 6 at the rear end face, and the front groove 6 is recessed forward from the rear end face of the front-stage casing 1. The front groove 6 can be an annular groove that is recessed axially and extends circumferentially. The front flange 5 is inserted into the front groove 6, and then the stator vane 7 is fixed to the front-stage casing 1.
[0047] As Figure 1 and Figure 2 shown, the rear-stage casing 3 is located on the rear side of the stator vane 2. The rear-stage casing 3 is provided with a rear groove 8 at the front end face, and the rear groove 8 is recessed backward from the front end face of the rear-stage casing 3. The rear groove 8 can be an annular groove that is recessed axially and extends circumferentially. The rear flange 7 is inserted into the rear groove 8, and then the stator vane 7 is fixed to the rear-stage casing 3.
[0048] As Figure 2 shown, the stator assembly further includes a plug 10. The plug 10 is inserted into the outer peripheral side wall 12 of the front groove 6 and the front flange 5 to prevent the front flange 5 from disengaging from the front groove 6. The outer peripheral side wall 12 of the front groove 6 is located on the outer peripheral side of the front groove 6, and the outer peripheral side wall 12 of the front groove 6 can be an annular wall on the outer peripheral side of the annular front groove 6. When the compressor is disassembled, the rear-stage casing 3 is disassembled first, then the stator vane 2 is disassembled, and then the front-stage casing 1 is disassembled. When the rear-stage casing 3 is disassembled, the plug 10 fixed on the outer peripheral side wall 12 of the front groove 6 blocks the front flange 5, preventing the front flange 5 from disengaging backward from the front groove 6 and preventing the stator vane 2 from being disassembled from the front-stage casing 1. The disassembly force thus causes the rear groove 8 to disengage backward from the rear flange 7, and the rear-stage casing 3 is disassembled from the stator vane 2. When the stator vane 2 is disassembled, the plug 10 is removed and no longer inserted into the outer peripheral side wall 12 of the front groove 6 and the front flange 5. The disassembly force thus causes the front flange 5 to disengage backward from the front groove 6, and the stator vane 2 is disassembled from the front-stage casing 1. This avoids the situation where the stator vane 2 is disassembled from the front-stage casing 1 before the rear-stage casing 3 is disassembled from the stator vane 2.
[0049] As Figure 1 and Figure 2 shown, the rear-stage casing 3 can be provided with a front-extending side wall 13 connecting to the front-stage casing 1. The front-extending side wall 13 can be an annular wall that protrudes forward and extends circumferentially, and is fixed to the front-stage casing 1 by threaded fasteners. The plug 10 can be arranged on the inner peripheral side of the front-extending side wall 13, and the front-extending side wall 13 can abut against the plug 10 to prevent the plug 13 from moving outward and disengaging from the front flange 5, avoiding the plug 13 from failing to be inserted into the outer peripheral side wall 12 of the front groove 6 and the front flange 5 when the rear-stage casing 3 is not disassembled from the stator vane 2. After the rear-stage casing 3 is disassembled from the stator vane 2, the front-extending side wall 13 no longer abuts against the outer peripheral side of the plug 10, and the plug 10 is thus allowed to move outward and be removed, no longer inserted into the outer peripheral side wall 12 of the front groove 6 and the front flange 5, allowing the stator vane 2 to be disassembled from the front-stage casing 1.
[0050] Alternatively, as Figure 1 and Figure 2 shown, the plug 10 can be arranged on the inner peripheral side of the forward extending side wall 13. There is a gap between the plug 10 and the forward extending side wall 13. The length 14 of the plug 10 inserted into the front flange 5 is greater than the distance 15 from the plug 10 to the forward extending side wall 13 in the length direction, so that the plug 10 can move towards the outer peripheral side but can never escape from the front flange 5, preventing the plug 13 from escaping from the front flange 5 and avoiding the plug 13 from failing to be inserted into the outer peripheral side wall 12 of the front groove 6 and the front flange 5 when the rear stage casing 3 and the stator vane 2 are not disassembled. After the rear stage casing 3 and the stator vane 2 are disassembled, the forward extending side wall 13 no longer blocks the outer peripheral side of the plug 10. Thus, the plug 10 is allowed to move towards the outer peripheral side and escape from the front flange 5, no longer being inserted into the outer peripheral side wall 12 of the front groove 6 and the front flange 5, allowing the stator vane 2 to be disassembled from the front stage casing 1. As Figure 2 shown, the plug 10 can extend radially. There can be a radial gap between the plug 10 and the forward extending side wall 13. The distance 15 from the plug 10 to the forward extending side wall 13 in the length direction is the radial distance from the plug 10 to the forward extending side wall 13. The length 14 of the plug 10 inserted into the front flange 5 is the radial length of the plug 10 inserted into the front flange 5. The radial length of the plug 10 inserted into the front flange 5 is greater than the radial distance from the plug 10 to the forward extending side wall 13, so that the plug 10 can move radially towards the outer peripheral side but can never escape from the front flange 5. The radial length of the plug 10 inserted into the front flange 5 can be 1 - 2 millimeters greater than the radial distance from the plug 10 to the forward extending side wall 13. A plurality of plugs 10 can be circumferentially distributed evenly on the outer peripheral side wall 12 of the front groove 6. A plurality of plugs 10 are inserted into the outer peripheral side wall 12 of the front groove 6 and the front flange 5 of the mounting seat 9 of the stator vane segment composed of a plurality of stator vanes 2.
[0051] As Figure 1 and Figure 2 shown, the plug 10 can abut against the portion 16 of the front flange 5 located in front of the plug 10, preventing the front flange 5 from moving backward and avoiding the stator vane 2 from moving backward and colliding with the rear rotor 4.
[0052] Alternatively, as Figure 1 and Figure 2 shown, there can be a gap between the plug 10 and the portion 16 of the front flange 5 located in front of the plug 10. The distance 17 from the plug 10 to the portion 16 of the front flange 5 located in front of the plug 10 is less than the distance 18 from the stator vane 2 to the rear rotor 4, so that the front flange 5 can move towards the rear side but the stator vane 2 can never touch the rear rotor 4, avoiding the stator vane 2 from colliding with the rear rotor 4. As Figure 2As shown, the front flange 5 and the front groove 6 may both extend axially. The front flange 5 protrudes axially, and the front groove 6 is recessed axially. There may be an axial gap between the plug 10 and the portion 16 of the front flange 5 located on the front side of the plug 10. The distance 17 from the plug 10 to the portion 16 of the front flange 5 located on the front side of the plug 10 is the axial distance from the plug 10 to the portion 16 of the front flange 5 located on the front side of the plug 10. The axial distance from the plug 10 to the portion 16 of the front flange 5 located on the front side of the plug 10 is less than the axial distance from the stator vane 2 to the rear rotor 4, so that the front flange 5 can move axially backward, but the stator vane 2 can never touch the rear rotor 4. The axial distance from the stator vane 2 to the rear rotor 4 may be greater than 2 mm, and the axial distance from the plug 10 to the portion 16 of the front flange 5 located on the front side of the plug 10 may be 0.5 - 1 mm.
[0053] As Figure 2 shown, the plug 10 may be a pin 11. A through hole 19 may be provided in the outer peripheral side wall 12 of the front groove 6, and a blind hole 20 may be provided in the outer peripheral side wall of the front flange 5. The pin 11 is inserted into the through hole 19 and the blind hole 20, thereby plugging the outer peripheral side walls 12 of the front flange 5 and the front groove 6. The portion 16 of the front flange 5 located on the front side of the plug 10 may be the front hole wall of the blind hole 20. The pin 11, the through hole 19, and the blind hole 20 may all extend radially. The pin 11 and the through hole 19 may be in an interference fit to prevent the pin 11 from moving outward and disengaging. An annular groove 21 may be provided in the head of the pin 11. When the pin 11 is inserted into the through hole 19 and the blind hole 20, the annular groove 21 protrudes on the outer peripheral side of the outer peripheral side wall 12 of the front groove 6, thus facilitating the application of force by the disassembling tooling. The pin 11 and the blind hole 20 may be in a clearance fit as Figure 2 shown.
[0054] A compressor includes the stator assembly as described above. The compressor may include multiple stages of stators and multiple stages of rotors, wherein at least one stage of the stator is the stator assembly as described above.
[0055] Although the present utility model is disclosed as above with embodiments, it is not used to limit the present utility model. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present utility model.
Claims
1. A stator assembly, characterized in that include: The stator blade has a mounting seat arranged on the outer peripheral side, the mounting seat has a front flange arranged on the front end surface, and the mounting seat has a rear flange arranged on the rear end surface; A front-stage casing, located at the front side of the stator blade, is provided with a front groove on the rear end surface, and the front groove is inserted into the front flange to fix the stator blade; A rear stage casing is located at the rear side of the stator blades, and a rear groove is provided on the front end surface, and the rear groove is inserted into the rear flange to fix the stator blades; as well as The plug-in unit is inserted into the peripheral side wall of the front groove and the front flange to prevent the front flange from escaping from the front groove.
2. The stator assembly according to claim 1, characterized in that: The rear stage casing is provided with a forward extending side wall connected to the front stage casing, the plug-in is provided on the inner peripheral side of the forward extending side wall, and the forward extending side wall abuts against the plug-in to prevent the plug-in from falling off the front flange.
3. The stator assembly according to claim 1, characterized in that: The rear-stage casing is provided with a forward-extending side wall connected to the front-stage casing, the plug-in is provided on the inner peripheral side of the forward-extending side wall, and the length of the plug-in inserted into the front flange is greater than the distance from the plug-in to the forward-extending side wall along the length direction, so as to prevent the plug-in from falling out of the front flange.
4. The stator assembly according to claim 3, characterized in that: The plug-in unit extends in radial direction, and a radial length of the plug-in unit inserted into the front flange is greater than a radial distance from the plug-in unit to the front extending side wall.
5. The stator assembly according to claim 1, characterized in that: The insert abuts against a portion of the front flange located at the front side of the insert to prevent the stator blades from colliding with the rear rotor.
6. The stator assembly according to claim 1, characterized in that: The distance from the insert to the front flange located at the front side of the insert is smaller than the distance from the stator blade to the rear rotor, so as to prevent the stator blade from colliding with the rear rotor.
7. The stator assembly according to claim 6, characterized in that: The front flange and the front groove both extend in the axial direction, and the axial distance from the plug-in to the front flange located at the front side of the plug-in is smaller than the axial distance from the stator blade to the rear rotor.
8. The stator assembly according to claim 1, characterized in that: The plug-in unit comprises a pin, a through hole is arranged on the outer peripheral side wall of the front groove, a blind hole is arranged on the outer peripheral side wall of the front flange, and the pin is inserted into the through hole and the blind hole.
9. The stator assembly according to claim 8, characterized in that: The pin and the through hole are interference fit, and the head of the pin is provided with an annular groove.
10. A compressor, characterized in that: The invention comprises a stator assembly according to any one of claims 1 to 9.