Double-shaft compression system supporting structure suitable for large-mass long shaft system

Abstract

The invention provides a double-shaft compression system supporting structure suitable for a large-mass long shaft system, and belongs to the technical field of aero-engines, the double-shaft compression system supporting structure comprises a main support, a rear auxiliary support and a front auxiliary support, the main support is connected with an exhaust force bearing casing of a double-shaft compression system and used for transmitting part of weight of the double-shaft compression system to the main support, and the rear auxiliary support is connected with the front auxiliary support; the rear auxiliary support is connected with an intermediate force-bearing casing of the double-shaft compression system and used for transmitting the weight of the intermediate force-bearing casing of the double-shaft compression system to the rear auxiliary support, and the front auxiliary support is connected with an air inlet force-bearing casing of the double-shaft compression system and used for transmitting the weight of the air inlet force-bearing casing of the double-shaft compression system to the front auxiliary support. The technical problem that a traditional single-fulcrum supporting structure cannot stably position and absorb thermal expansion deformation is solved, and long-time stable supporting of a large-mass long-shafting biaxial compression system in a biaxial compressor tester in a high-temperature working environment is achieved through the three-fulcrum supporting structure.

Description

Technical Field

[0001] This application belongs to the technical field of aeroengines, and particularly relates to a support structure for a two - shaft compression system applicable to a large - mass long - shaft system. Background Art

[0002] The compression system support structure is mainly used to support the compression system (usually one of the fan, low - pressure compressor, or high - pressure compressor) in a compressor tester. The existing compression system support structures are mainly applied to single - shaft compressor testers, and the single - shaft compressor testers have a relatively short axial dimension and a relatively light self - weight. Therefore, the existing compression system support structures can adopt a single - support layout to achieve stable support for the single - shaft compressor tester.

[0003] However, for a two - shaft compression system with a large mass and a long shaft system (usually composed of a fan and a compressor), the two - shaft compression system has a long axial dimension and a large self - weight. The form of single - support cannot achieve stable positioning, and it is easy to cause deformation or position movement of the part far from the support due to unstable support; in addition, due to the high working - environment temperature of the two - shaft compression system, the single - support structure cannot absorb thermal expansion deformation. Working for a long time in a high - temperature environment will cause position movement or excessive local stress caused by thermal expansion deformation.

[0004] Therefore, a support structure for a two - shaft compression system with functions such as stable and reliable positioning and the ability to absorb thermal expansion deformation is needed. Summary of the Invention

[0005] The purpose of this application is to provide a support structure for a two - shaft compression system applicable to a large - mass long - shaft system to solve or mitigate at least one problem in the background art.

[0006] The technical solution of this application is: a support structure for a two - shaft compression system applicable to a large - mass long - shaft system, including: a main support, a rear auxiliary support, and a front auxiliary support, where: The main support is connected to the exhaust bearing casing of the two - shaft compression system and is used to transfer part of the weight of the two - shaft compression system to the main support; The intermediate load-bearing casing of the post auxiliary support connecting the dual-axis compression system is used to transfer the weight of the intermediate load-bearing casing of the dual-axis compression system to the post auxiliary support. The post auxiliary support includes a post auxiliary support base, a first inclined plane adjusting component, a square bushing, a first spherical plain bearing component and a first pin shaft. The post auxiliary support base is connected to the tester platform track. The first inclined plane adjusting component is arranged on the post auxiliary support base. The square bushing is arranged on the first inclined plane adjusting component and connected to the post auxiliary support base. The height adjustment of the square bushing in the vertical direction is realized through the first inclined plane adjusting component. The first spherical plain bearing component is installed in the square bushing. One end of the first pin shaft is connected to the intermediate load-bearing casing of the dual-axis compression system, and the other end is installed on the first spherical plain bearing component, so as to realize the connection between the intermediate load-bearing casing of the dual-axis compression system and the post auxiliary support; The front auxiliary support connects the air intake load-bearing casing of the dual-axis compression system and is used to transfer the weight of the air intake load-bearing casing of the dual-axis compression system to the front auxiliary support.

[0007] Preferably, the main support includes an exhaust duct stabilizing device arranged on the tester platform. The exhaust load-bearing casing of the dual-axis compression system is connected to the exhaust duct stabilizing device by means of rabbet fit and screw fastening.

[0008] Preferably, the post auxiliary support base is integrally cast and has a hollow structure for water cooling or air cooling inside.

[0009] Preferably, the first spherical plain bearing component is installed in the square bushing with a clearance.

[0010] Preferably, the clearance between the first spherical plain bearing component and the square bushing is 0.02 mm to 0.05 mm.

[0011] Preferably, the front auxiliary support includes a front auxiliary support base, a second inclined plane adjusting component, a positioning pin shaft component, a second spherical plain bearing component and an ear. The front auxiliary support base is connected to the tester platform track. The second inclined plane adjusting component is arranged on the front auxiliary support base. The positioning pin shaft component is arranged on the front auxiliary support base through the second inclined plane adjusting component. The height adjustment of the positioning pin shaft component in the vertical direction is realized through the second inclined plane adjusting component. The second spherical plain bearing component is sleeved on the positioning pin shaft component. One end of the ear is connected to the air intake load-bearing casing of the dual-axis compression system, and the other end is sleeved on the second spherical plain bearing component in the form of a bolt cover plate.

[0012] Preferably, the second spherical plain bearing component is in clearance fit with the positioning pin shaft component.

[0013] Preferably, the clearance between the second spherical plain bearing component and the positioning pin shaft component is 0.01 mm to 0.032 mm.

[0014] The support structure of the biaxial compression system applicable to the large-mass long shaft system provided by this application solves the technical problems that the traditional single-support structure cannot stably position and absorb thermal expansion deformation. Through the support structure form of three supports, the convenience of installation and replacement operations and the structural simplicity are fully considered, realizing the long-term stable support of the biaxial compression system of the large-mass long shaft system of the biaxial compressor tester in a high-temperature working environment. Brief Description of the Drawings

[0015] To more clearly illustrate the technical solutions provided by this application, the drawings will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application.

[0016] Figure 1 It is a general schematic diagram of the support structure of the biaxial compression system applicable to the large-mass long shaft system of this application.

[0017] Figure 2 It is a schematic diagram of the rear auxiliary support of this application.

[0018] Figure 3 It is Figure 2 an enlarged view of the position I of the rear auxiliary support in

[0019] Figure 4 It is a cross-sectional view of the rear auxiliary support of this application.

[0020] Figure 5 It is a schematic diagram of the front auxiliary support of this application.

[0021] Figure 6 It is Figure 5 an enlarged view of the position II of the front auxiliary support in Detailed Description of the Embodiments

[0022] To make the purpose, technical solutions, and advantages of the implementation of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the drawings in the embodiments of this application.

[0023] To solve the problem that the existing single-support structure layout cannot achieve the stable positioning of the biaxial compression system, according to the structural layout characteristics of the biaxial compression system, this application adds auxiliary support points at the intermediate bearing housing and the intake bearing housing of the biaxial compression system to achieve the stable support and effective positioning of the entire biaxial compression system, thus solving the problems that the traditional single-support structure cannot achieve the reliable positioning and absorb thermal expansion deformation of the biaxial compression system of the large-mass long shaft system.

[0024] As Figures 1 to 6 shown, the support structure of the biaxial compression system applicable to the large-mass long shaft system of this application includes: a main support 10, a rear auxiliary support 20, and a front auxiliary support 30.

[0025] Among them, the main support 10 includes an exhaust duct stabilizing device arranged on the tester platform. The exhaust bearing casing of the twin-spool compression system is connected to the exhaust duct stabilizing device through a connection method of rabbet fit and screw fastening, so as to transfer the main weight of the twin-spool compression system to the exhaust duct stabilizing device of the tester, and finally realize the axial and radial positioning of the twin-spool compression system.

[0026] As Figures 2 to 4 shown, the rear auxiliary support 20 includes a rear auxiliary support base 21, a first inclined plane adjusting component 22, a square bushing 23, a first spherical plain bearing component 24 and a first pin shaft 25.

[0027] The rear auxiliary support base 21 is integrally cast, and its internal design is a hollow structure that can be water-cooled or air-cooled, and it can be cooled in a high-temperature environment to prevent the rear auxiliary support base 21 itself from deforming due to high temperature. The bottom of the rear auxiliary support base 21 is connected to the tester platform track by means of anchor bolts, and the axial movement of the rear auxiliary support 20 can be realized.

[0028] The first inclined plane adjusting component 22 is arranged on the rear auxiliary support base 21, the square bushing 23 is arranged on the first inclined plane adjusting component 22 and is connected to the rear auxiliary support base 21 by detachable bolts, and the height adjustment of the square bushing 23 in the height direction is realized through the first inclined plane adjusting component 22. Among them, the first inclined plane adjusting component 22 can realize the height adjustment of the first pin shaft 25 by pushing, pulling and retracting along the inclined plane direction, so as to ensure the support effectiveness of the rear auxiliary support 20. It should be noted that the square bushing 23 in the present application can be conveniently replaced according to different sizes of the twin-spool compression system.

[0029] The first spherical plain bearing component 24 is installed in the square bushing 23, one end of the first pin shaft 25 is connected to the intermediate bearing casing of the twin-spool compression system, and the other end is installed on the first spherical plain bearing component 24, so as to realize the connection between the intermediate bearing casing of the twin-spool compression system and the rear auxiliary support 20.

[0030] Through the rear auxiliary support 20, the weight of the intermediate bearing casing of the twin-spool compression system can be transferred to the rear auxiliary support base 21, and the support of the vertical direction force of the intermediate bearing casing of the twin-spool compression system is realized.

[0031] In a preferred embodiment of the present application, due to the relatively high operating temperature at the support position of the intermediate load-bearing casing of the dual-axis compression system, obvious axial and radial thermal expansion deformations will occur in the structure of the dual-axis compression system itself. In the rear auxiliary support 20 of the present application, the first joint bearing assembly 24 is installed in a square bushing 23 with a gap. Among them, the dimensions of the square bushing 23 are slightly larger than those of the first joint bearing assembly 24 in both the axial and horizontal directions. The first joint bearing assembly 24 can slide axially and horizontally within the square bushing 23, realizing the function that the rear auxiliary support 20 can absorb the axial and radial thermal expansion deformation amounts.

[0032] In a preferred embodiment of the present application, the above-mentioned gap is designed to be 0.02 mm to 0.05 mm, which can be achieved by adding an adjusting pad between the upper cover 231 and the housing 232 of the square bushing 23.

[0033] As Figure 5 and Figure 6 shown, the front auxiliary support 30 provided by the present application includes a front auxiliary support base 31, a second inclined plane adjusting assembly 32, a positioning pin shaft assembly 33, a second joint bearing assembly 34 and an ear 35.

[0034] The front auxiliary support base 31 is manufactured by casting, and its bottom is connected to the test rig platform track by means of anchor bolts, enabling the axial movement of the front auxiliary support 30.

[0035] The second inclined plane adjusting assembly 32 is arranged on the front auxiliary support base 31, and the positioning pin shaft assembly 33 is arranged on the front auxiliary support base 31 through the second inclined plane adjusting assembly 32. The height direction adjustment of the positioning pin shaft assembly 33 is realized through the second inclined plane adjusting assembly 32. In the present application, the second inclined plane adjusting assembly 32 has the same or similar structure as the first inclined plane adjusting assembly 22, that is, through pushing, pulling and retracting along the inclined plane direction, the height direction adjustment of the positioning pin shaft assembly 33 can be realized.

[0036] The second joint bearing assembly 34 is sleeved on the positioning pin shaft assembly 33. One end of the ear 35 is connected to the air intake load-bearing casing of the dual-axis compression system, and the other end is sleeved on the second joint bearing assembly 34 through the structure of a bolt cover plate. In the present application, by adopting a detachable bolt cover plate installation method between the ear 35 and the second joint bearing assembly 34, different dual-axis compression systems can be dealt with, thus realizing the convenient replacement of the ear 35.

[0037] Through the front auxiliary support 30, the weight of the air intake load-bearing casing of the dual-axis compression system can be transmitted to the front auxiliary support base 31, realizing the support of the vertical direction force of the front load-bearing casing of the dual-axis compression system.

[0038] In the preferred embodiment of the present application, although the operating temperature at the intake load-bearing casing support position of the dual-axis compression system is relatively low, the dual-axis compression system will transfer the rear axial thermal expansion and deformation to this position, thereby absorbing the axial thermal expansion and deformation. Therefore, in the present application, a small clearance fit is set between the second joint bearing assembly 34 and the positioning pin shaft assembly 33. Preferably, the small clearance is designed to be 0.01mm~0.032mm, so that the second joint bearing assembly 34 can slide axially on the positioning pin shaft assembly 33, thereby realizing the function of the front auxiliary support 30 to absorb the axial thermal expansion and deformation.

[0039] In the front auxiliary support 30 of the present application, the weight of the air intake load-bearing casing of the dual-axis compression system is transferred to the front auxiliary support bracket 31 through the support method of the second joint bearing assembly 34 connected to the support ear 35 mounted on the positioning pin shaft assembly 33, thereby realizing the auxiliary support of the air intake load-bearing casing of the dual-axis compression system.

[0040] The biaxial compression system support structure provided in the present application solves the technical problem that the traditional single-point support structure cannot stably position and absorb thermal expansion and deformation. Through the three-point support structure form, the convenience of installation and replacement operation and the ease of structure are fully considered, and the large-mass long-axis biaxial compression system of the biaxial compressor tester can be stably supported for a long time in a high-temperature working environment.

[0041] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A biaxial compression system support structure suitable for a large mass long axis system, characterized in that: include: A main support (10), a rear auxiliary support (20) and a front auxiliary support (30), wherein: The main support (10) is connected to the exhaust load-bearing casing of the dual-axis compression system, and is used to transfer part of the weight of the dual-axis compression system to the main support (10); The rear auxiliary support (20) is connected to the intermediate load-bearing casing of the biaxial compression system and is used to transfer the weight of the intermediate load-bearing casing of the biaxial compression system to the rear auxiliary support (20). The rear auxiliary support (20) comprises a rear auxiliary support seat (21), a first inclined plane adjustment component (22), a square bushing (23), a first joint bearing component (24) and a first pin shaft (25). The rear auxiliary support seat (21) is connected to the tester platform track. The first inclined plane adjustment component (22) is arranged on the rear auxiliary support seat (21). The square bushing (23) is arranged on the first inclined plane adjustment component (22) and connected to the rear auxiliary support seat (21), and the height direction of the square bushing (23) is adjusted by the first inclined plane adjustment component (22). The first joint bearing component (24) is installed in the square bushing (23). One end of the first pin shaft (25) is connected to the intermediate load-bearing casing of the dual-axis compression system, and the other end is installed on the first joint bearing component (24), thereby realizing the connection between the intermediate load-bearing casing of the dual-axis compression system and the rear auxiliary support (20); The front auxiliary support (30) is connected to the air intake load-bearing casing of the dual-axis compression system and is used to transfer the weight of the air intake load-bearing casing of the dual-axis compression system to the front auxiliary support (30).

2. The biaxial compression system support structure suitable for a large mass long axis system as claimed in claim 1, characterized in that: The main support (10) comprises an exhaust duct stabilizing device arranged on the tester platform, and the exhaust load-bearing casing of the dual-axis compression system is connected to the exhaust duct stabilizing device by means of stopper fitting and screw fastening.

3. The biaxial compression system support structure suitable for a large mass long axis system as claimed in claim 1, characterized in that: The rear auxiliary support seat (21) is integrally cast, and the interior is a hollow structure for water cooling or air cooling.

4. The biaxial compression system support structure suitable for a large mass long axis system as claimed in claim 1, characterized in that: The first spherical bearing assembly (24) and the square bushing (23) are installed with clearance.

5. The biaxial compression system support structure suitable for a large mass long axis system as claimed in claim 4, characterized in that: The gap between the first spherical bearing assembly (24) and the square bushing (23) is 0.02 mm to 0.05 mm.

6. The biaxial compression system support structure suitable for a large mass long axis system as claimed in claim 1, characterized in that: The front auxiliary support (30) comprises a front auxiliary support seat (31), a second inclined plane adjustment component (32), a positioning pin shaft component (33), a second joint bearing component (34) and a support ear (35); the front auxiliary support seat (31) is connected to the tester platform track; the second inclined plane adjustment component (32) is arranged on the front auxiliary support seat (31); the positioning pin shaft component (33) is arranged on the front auxiliary support seat (31) through the second inclined plane adjustment component (32); the height direction of the positioning pin shaft component (33) is adjusted through the second inclined plane adjustment component (32); the second joint bearing component (34) is sleeved on the positioning pin shaft component (33); one end of the support ear (35) is connected to the air intake bearing casing of the dual-axis compression system; the other end is sleeved on the second joint bearing component (34) through the structural form of a bolt cover plate.

7. The biaxial compression system support structure suitable for a large mass long axis system as claimed in claim 6, characterized in that: The second joint bearing assembly (34) is clearance-matched with the positioning pin shaft assembly (33).

8. The biaxial compression system support structure suitable for a large mass long axis system as claimed in claim 7, characterized in that: The clearance between the second joint bearing assembly (34) and the positioning pin assembly (33) is 0.01 mm to 0.032 mm.

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