CN114161347A - High-pressure compressor rotor centering fixture - Google Patents
High-pressure compressor rotor centering fixture Download PDFInfo
- Publication number
- CN114161347A CN114161347A CN202111223571.8A CN202111223571A CN114161347A CN 114161347 A CN114161347 A CN 114161347A CN 202111223571 A CN202111223571 A CN 202111223571A CN 114161347 A CN114161347 A CN 114161347A
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- CN
- China
- Prior art keywords
- compressor rotor
- pressure compressor
- fixture
- assembly
- mandrel assembly
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
- B25B11/02—Assembly jigs
Abstract
The invention provides a high-pressure compressor rotor centering fixture, wherein a high-pressure compressor rotor assembly is supported on an intermediate bearing frame unit body through a ball bearing, the centering fixture comprises a fixture support seat arranged on the mounting edge of the intermediate bearing frame unit body, a flange adapter plate connected with the compressor rotor assembly and a mandrel assembly used for connecting the fixture support seat and the flange adapter plate, and the fixture support seat, the mandrel assembly and the flange adapter plate are coaxially arranged. The high-pressure compressor rotor centering clamp is used in the process of assembling a high-pressure compressor unit body, so that the accuracy of axial parameters after assembling is improved by 3 times, and the deviation of circumferential 4-point uniform distribution detection is reduced to 0.05 mm; the accuracy of the rotor and stator blade tip clearance value is improved by five times, and the deviation of circumferential 4-point uniform distribution detection is reduced to 0.02-0.03 mm. The centering precision is high, the installation and the dismantlement are convenient, the structure is simple, and the assembly quality of the aero-engine is improved.
Description
Technical Field
The invention belongs to the field of aviation manufacturing, and particularly relates to a high-pressure compressor rotor centering clamp.
Background
The small bypass ratio, boosting type turbofan engine with stealth and vector thrust consists of a host and a system, wherein the host is designed according to a unit body; the core machine unit body is a fuel gas generator, and the high-pressure air compressor unit body belongs to a subordinate sublevel unit body of the core machine unit body. In the process of assembling and producing the engine, the stability, reliability and safety of the assembling quality of each subordinate unit body are directly related to the quality of the whole machine in the working process; higher control requirements are provided for axial parameters, radial parameters and the like between a rotor and a stator on a high-pressure compressor unit body so as to ensure the reliability and safety of the whole machine during working.
In the assembly process of the typical low bypass ratio turbofan engine at present, different solutions are held as to whether a compressor rotor assembly is centered or not when assembling a high-pressure compressor unit body. In one view, the compressor rotor assembly does not need to be centered, and axial and radial control parameters between the rotor and the stator of the compressor can be obtained by means of indirect calculation. For example, when a compressor stator is installed in a certain type of third-generation military engine in China, a compressor rotor assembly is centered, but the compressor rotor assembly cannot rotate relative to a rotor axis, and related control parameters between the compressor rotor and the compressor stator cannot be completely detected. In another view, a rotor assembly of the compressor needs to be centered, and the coaxiality of the rotor of the compressor relative to a reference piece is adjusted through a centering clamp, so that axial and radial control parameters between a rotor and a stator of the compressor can be measured more accurately, and the parameter change relation of the rotor and the stator time of the compressor during normal work of the engine can be evaluated more accurately. However, the existing centering technology cannot meet the requirement of accurately detecting the axial parameters and the radial parameters between the rotor and the stator in the assembling process.
Disclosure of Invention
In order to solve the problems, the invention provides the clamp which is high in centering precision and simple in installation operation and is used for meeting the requirement of centering of the air compressor rotor assembly of the engine.
The invention aims to provide a high-pressure compressor rotor centering fixture, wherein a high-pressure compressor rotor assembly is supported on an intermediate bearing frame unit body through a ball bearing, the centering fixture comprises a fixture support seat arranged on the mounting edge of the intermediate bearing frame unit body, a flange adapter plate connected with the compressor rotor assembly and a mandrel component used for connecting the fixture support seat and the flange adapter plate, and the fixture support seat, the mandrel component and the flange adapter plate are coaxially arranged.
The high-pressure compressor rotor centering fixture provided by the invention is also characterized in that the fixture support comprises a first outer spigot used for being matched with the mounting edge and an inner spigot matched with the mandrel component.
The high-pressure compressor rotor centering clamp provided by the invention is also characterized in that the flange adapter plate comprises a second outer spigot used for being connected with a compressor rotor assembly; the flange adapter plate is connected with the mandrel component through a rolling rod bearing.
The high-pressure compressor rotor centering fixture provided by the invention is also characterized in that the outer ring of the roller bearing is arranged in the mounting groove of the flange adapter plate through a clamping ring, and the inner ring of the roller bearing is arranged on the mandrel component through a compression nut.
The high-pressure compressor rotor centering clamp provided by the invention is also characterized in that the roller bearing is a bearing with a radial clearance of 0.02-0.04 mm.
The high-pressure compressor rotor centering clamp provided by the invention is also characterized in that the matching surface of the mandrel component and the clamp support adopts double cylindrical surfaces for matching, and the mandrel component is axially fixed with the clamp support through an end face compression nut.
The high-pressure compressor rotor centering clamp provided by the invention is also characterized in that the mandrel component is a variable-section mandrel component, and the cross sections of two ends of the variable-section mandrel component are different.
The high-pressure compressor rotor centering fixture provided by the invention is also characterized in that a lifting point is arranged on the end surface of one side, connected with the flange adapter plate, of the mandrel component.
The high-pressure compressor rotor centering clamp provided by the invention is also characterized in that the matching surface of the mandrel component and the clamp support adopts a non-constant-diameter double-cylindrical surface with the characteristic of automatic centering, and the mandrel component is axially fixed with the clamp support through an end face compression nut.
The high-pressure compressor rotor centering fixture provided by the invention is also characterized in that the double-cylindrical positioning surfaces in the inner hole of the fixture support are designed to have unequal inner diameters.
The high-pressure compressor rotor centering fixture provided by the invention is also characterized in that the double-cylindrical positioning surfaces of the mandrel component adopt unequal outer diameter designs.
The high-pressure compressor rotor centering fixture provided by the invention is also characterized in that a lifting point is arranged on the end surface of one side, connected with the flange adapter plate, of the mandrel component.
Compared with the prior art, the invention has the following beneficial effects
The high-pressure compressor rotor centering clamp provided by the embodiment of the invention is used in the process of assembling the high-pressure compressor unit body, so that the accuracy of the axial parameters after assembly is improved by 3 times, and the deviation of circumferential 4-point uniform distribution detection is reduced to 0.05 mm; the accuracy of the rotor and stator blade tip clearance value is improved by five times, and the deviation of circumferential 4-point uniform distribution detection is reduced to 0.02-0.03 mm. The centering precision is high, the installation and the dismantlement are convenient, the structure is simple, and the assembly quality of the aero-engine is improved.
Description of the drawings:
in order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a high-pressure compressor rotor centering fixture provided by the invention;
FIG. 2 is a partially enlarged view of a high pressure compressor rotor centering fixture provided by the present invention;
figure 3 is a schematic view of the installation of the high pressure compressor rotor centering fixture provided by the present invention,
wherein, 1: the end face is pressed tightly with a nut; 2: a clamp support; 3: a mandrel assembly; 4: a roller bearing; 5: a flange adapter plate; 6: a collar; 7: hoisting points; 8: a compression nut; 9: a medium bearing frame unit body; 10: a deep groove ball bearing; 11: a centering jig; 12: a compressor rotor assembly.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the following embodiments are specifically described with reference to the accompanying drawings.
In the description of the embodiments of the present invention, it should be understood that the terms "central", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only used for convenience in describing and simplifying the description of the present invention, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified. The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
As shown in fig. 1-3, an embodiment of the present invention provides a high-pressure compressor rotor centering fixture, where a high-pressure compressor rotor assembly is supported on an intermediate bearing frame unit 9 through a ball bearing 4, the centering fixture 11 includes a fixture support 2 installed on an installation edge of the intermediate bearing frame unit 9, a flange adapter 5 connected to the compressor rotor assembly, and a mandrel assembly 3 for connecting the fixture support 2 and the flange adapter 5, and the fixture support 2, the mandrel assembly 3, and the flange adapter 5 are coaxially arranged.
In some embodiments, the clamp mount 2 includes a first male end for mating with the mounting edge and a female end for mating with the mandrel assembly 3.
In some embodiments, the flange adapter 5 includes a second outer spigot for connection with a compressor rotor assembly; the flange adapter plate 5 is connected with the mandrel component 3 through a rolling rod bearing 4. Based on the flange adapter plate 5 is connected with the rear shaft neck of the compressor rotor assembly 12, the rear shaft neck is of an arc tooth end structure, and the second outer spigot plays a role in reducing cost.
In some embodiments, the outer ring of the roller bearing 4 is mounted in the mounting groove of the flange adapter 5 by a collar 6, and the inner ring of the roller bearing 4 is mounted on the mandrel assembly 3 by a compression nut 8.
In some embodiments, the roller bearing 4 is a bearing with a radial play of 0.02mm to 0.04 mm.
In some embodiments, the matching surfaces of the mandrel assembly 3 and the fixture support 2 adopt double cylindrical surface matching, and the mandrel assembly 3 is axially fixed with the fixture support 2 through the end face compression nut 1. The outer diameters of the double cylindrical surfaces with different diameters adopted by the mandrel component 3 and the clamp support are respectively 80mm and 84 mm.
In some embodiments, the mandrel assemblies 3 are variable cross-section mandrel assemblies having different cross-sections at each end. The variable cross-section mandrel assembly improves the rigidity and centering precision of the mandrel.
In some embodiments, a lifting point 7 is provided on an end surface of the mandrel assembly 3 connected to the flange adapter 5.
The installation procedure of the above embodiment is as follows:
firstly, mounting a clamp support 2 on a mounting edge corresponding to a medium bearing frame unit body 9, and fastening by using a connecting piece; installing a mandrel component 3 with an inner ring of a rolling rod bearing 4, penetrating through a disc cavity of the whole compressor rotor component 12, installing the mandrel component on the clamp support 2, and fastening the mandrel component on the clamp support 2 by using an end face compression nut 1; and finally, mounting a flange adapter disc 5 assembly with a rolling rod bearing 4, and fixedly connecting the flange adapter disc with a rear shaft neck on an air compressor rotor assembly 12.
In conclusion, the high-pressure compressor rotor centering clamp provided by the embodiment of the invention adopts an embedded centering structure, the internal space and structure of the compressor rotor are fully utilized, and the centering clamp is 'embedded' into the compressor rotor after being installed, so that the centering clamp 11 is ensured to have no interference on the assembly of compressor parts in the installation or disassembly process; a cantilever type supporting structure is adopted, and after the centering fixture is fastened to the reference part through the fixture support 2, a cantilever supporting mode is formed for supporting the compressor rotor assembly; the core rod assembly 3 and the clamp support 2 are centered by adopting a stepped double cylindrical surface, and the end surfaces are positioned; in order to facilitate the installation of the whole set of centering fixture on the compressor part, the mandrel component 3 is detachable and is provided with a lifting point 7; the clamp support 2 and the flange adapter plate 5 are positioned by adopting double outer spigots with outer spigot designs, so that the comprehensive positioning precision is ensured, the clamp support is directly matched with related parts on a compressor part, and the positioning repeatability and stability are improved; the rolling rod bearing 4 is adopted and combined with a front supporting point deep groove ball bearing 10 of the compressor rotor, the compressor rotor can rotate along the axis of the rotor, the relative position of the rotor and the stator in the process of installing the compressor stator can be reflected more truly, and whether the rotor and the stator interfere in the assembling process can be dynamically checked.
The centering fixture provided by the invention has been applied in practical engineering for 2 years, and through the comparison of the existence of the centering fixture when the high-pressure compressor unit body is assembled, statistical data show that the accuracy of axial parameters between a compressor rotor and a stator is improved by 3 times, and the deviation of circumferential 4-point uniform distribution detection is reduced to 0.05 mm; the accuracy of the rotor and stator blade tip clearance value is improved by 5 times, and the deviation of circumferential 4-point uniform distribution detection is reduced to 0.02-0.03 mm. The centering precision is high, the installation and the dismantlement are convenient, the structure is simple, and the assembly quality of the aero-engine is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The high-pressure compressor rotor centering fixture is characterized by comprising a fixture support arranged on the mounting edge of the medium bearing frame unit, a flange switching disc connected with the compressor rotor assembly and a mandrel assembly used for connecting the fixture support and the flange switching disc, wherein the fixture support, the mandrel assembly and the flange switching disc are coaxially arranged.
2. The high pressure compressor rotor centering fixture of claim 1, wherein said fixture mount includes a first male end for mating with said mounting edge and a female end for mating with said mandrel assembly.
3. The high pressure compressor rotor centering fixture of claim 1, wherein the flange adapter plate includes a second outer spigot for connection with a compressor rotor assembly; the flange adapter plate is connected with the mandrel component through a rolling rod bearing.
4. The high pressure compressor rotor centering fixture of claim 3, wherein the outer ring of the roller bearing is mounted in the mounting groove of the flange adapter plate by a collar, and the inner ring of the roller bearing is mounted on the mandrel assembly by a compression nut.
5. The high-pressure compressor rotor centering fixture as claimed in claim 4, wherein the roller bearing is a bearing with a radial play of 0.02mm to 0.04 mm.
6. The high-pressure compressor rotor centering fixture of claim 1, wherein the matching surface of the mandrel assembly and the fixture support adopts a non-constant diameter double cylindrical surface with a self-centering feature, and the mandrel assembly is axially fixed with the fixture support through an end face compression nut.
7. The high-pressure compressor rotor centering fixture of claim 6, wherein the bi-cylindrical locating surfaces in the fixture support inner bore are of unequal inner diameter design.
8. The high pressure compressor rotor centering fixture of claim 6, wherein the bi-cylindrical locating surfaces of the mandrel subassemblies are of unequal outer diameter design.
9. The high pressure compressor rotor centering fixture of claim 1, wherein the mandrel assembly is a variable cross-section mandrel assembly, the variable cross-section mandrel assembly having a different cross-section at each end.
10. The high-pressure compressor rotor centering fixture as claimed in claim 1, wherein a lifting point is provided on an end surface of one side of the mandrel assembly connected to the flange adapter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111223571.8A CN114161347B (en) | 2021-10-20 | 2021-10-20 | High-pressure compressor rotor centering fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111223571.8A CN114161347B (en) | 2021-10-20 | 2021-10-20 | High-pressure compressor rotor centering fixture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114161347A true CN114161347A (en) | 2022-03-11 |
| CN114161347B CN114161347B (en) | 2023-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111223571.8A Active CN114161347B (en) | 2021-10-20 | 2021-10-20 | High-pressure compressor rotor centering fixture |
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Citations (16)
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2021
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| CN112207597A (en) * | 2020-09-03 | 2021-01-12 | 福建省威诺数控有限公司 | Floating taper sleeve centering clamp |
| CN112388546A (en) * | 2020-11-19 | 2021-02-23 | 中国航发沈阳发动机研究所 | Engine rotor and stator structure dismounting device |
| CN113211339A (en) * | 2021-03-18 | 2021-08-06 | 中国人民解放军第五七一九工厂 | A frock clamp for horizontal balanced of aviation turboshaft engine single-disk |
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| CN114161347B (en) | 2023-09-15 |
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