Mounting rack for turboprop engine shaft platform test

Abstract

The application discloses a mounting rack for turbo-prop engine shaft table test, which comprises a chassis assembly, a fixed main mounting section support, a stringing main mounting section support and two groups of auxiliary mounting section supports vertically arranged on the chassis assembly. The fixed main mounting section support and the stringing main mounting section support are used for being connected with two main mounting sections on the front end of the engine respectively, and the stringing main mounting section support is arranged along the radial direction of the engine to compensate the thermal expansion in the radial direction of the front end of the engine. The two groups of auxiliary mounting section supports are used for being connected with two auxiliary mounting sections on the middle and rear end of the engine respectively, and are arranged along the axial direction, the radial direction and the vertical direction of the engine to compensate the thermal expansion in the axial direction and the radial direction of the engine. The mounting rack can compensate the thermal expansion in the axial direction and the radial direction of the engine, so as to eliminate the additional load caused by the four supporting points of the engine not being on the same plane and shield the resonance frequency generated by the test bench and the engine.

Description

Technical Field

[0001] This invention relates to the field of turboprop engine shaft test technology, and in particular, to a mounting bracket for turboprop engine shaft test. Background Technology

[0002] A certain turboprop engine boasts superior performance and functionality compared to currently operational domestic turboprop engines. It is a high-performance, third-generation, high-power turboprop engine representing the pinnacle of my country's turboprop engine technology for the foreseeable future and a landmark piece of equipment in my country's aero-engine product line. During the development of this turboprop engine, two types of test stands are required based on testing characteristics: one is an engine + propeller test stand, whose operating mode is identical to the installed state; this type is simply called a propeller test stand. The other type uses a dynamometer instead of a propeller for precise measurement of the engine's output power and torque; this type is simply called a shaft test stand.

[0003] The structure, performance, and function of this turboprop engine are far superior to those of existing turboprop engines. The installation method for the engine's shaft stand test is different from that of existing turboshaft and turboprop engines due to its structural form. Therefore, in order to ensure that the turboprop engine can be successfully tested on the shaft stand, a new engine mounting frame that meets the requirements of its shaft stand test needs to be developed and designed.

[0004] Existing dynamic stress measurement and testing equipment and methods have the following drawbacks:

[0005] a) It has a single function and can only be installed on a single specific engine model;

[0006] b) It can compensate for small axial runout of the engine, usually less than (±1°).

[0007] c) The bracket has limited operating space, making it impossible to replace components such as the oil pump and bleed valve when the engine is mounted on the test bench;

[0008] d) Each time the engine is put on the platform, it needs to be readjusted, and the readjustment requirements are high and the workload is large;

[0009] e) The main mounting section and auxiliary mounting section have low flexibility, which is not conducive to engine installation and disassembly. Summary of the Invention

[0010] This invention provides a mounting bracket for turboprop engine shaft test, which solves the technical problem that existing test brackets cannot compensate for engine axial runout.

[0011] The technical solution adopted in this invention is as follows:

[0012] A mounting bracket for a turboprop engine shaft test includes: a base frame assembly that is adjustable and slidably mounted on a mounting platform along the axial direction of the engine to be mounted; and a fixed main mounting section bracket, a traverse main mounting section bracket, and two sets of auxiliary mounting section brackets vertically supported on the base frame assembly. The fixed main mounting section bracket and the traverse main mounting section bracket are located at the front section of the engine and are spaced apart relative to each other along the width direction of the base frame assembly, for connecting to two main mounting sections on both sides of the front end of the engine, respectively. The fixed main mounting section bracket is fixedly mounted to form the mounting base point of the mounting bracket, and the traverse main mounting section bracket is traversely mounted along the radial direction of the engine to compensate for the radial thermal expansion of the front end of the engine. The two sets of auxiliary mounting section brackets are located at the middle and rear sections of the engine and are spaced apart relative to each other along the width direction of the base frame assembly, for connecting to two auxiliary mounting sections on both sides of the middle and rear ends of the engine, respectively. The two sets of auxiliary mounting section brackets are slightly traversely mounted along the axial direction of the engine, inward and outward in the radial direction, and up and down vertically to compensate for the axial and radial thermal expansion of the engine.

[0013] Furthermore, the fixed main mounting section bracket and the traverse main mounting section bracket each include a main bracket vertically supported on the underframe assembly. The fixed main mounting section bracket also includes a fixed main mounting section connected to the top of the corresponding main bracket, and the traverse main mounting section bracket also includes a traverse main mounting section connected to the top of the corresponding main bracket. The fixed main mounting section and the traverse main mounting section are used to connect to two main mounting sections on both sides of the front end of the engine, and the fixed main mounting section is fixedly set to form the mounting base point of the mounting bracket, while the traverse main mounting section is set to move slightly in the radial direction of the engine.

[0014] Furthermore, the fixed main mounting section includes a first base connected to the top of a corresponding main bracket via a bolt assembly, a first upper cover cooperating with the first base, a first pin assembly for connecting the first base and the first upper cover, a first bolt assembly for fixing the first upper cover to the first base, a first opening and closing handle connected to the first upper cover, and a fixed mounting section; the first sides of the first upper cover and the first base are hinged by the first pin assembly, and the second sides are locked and fixed by the first bolt assembly; the inner end of the fixed mounting section is installed between the first upper cover and the first base, and the outer end of the fixed mounting section is connected to the corresponding main mounting section on the engine. The main mounting section includes a second base connected to the top of a corresponding main bracket via a bolt assembly, a second upper cover cooperating with the second base, a second pin assembly for connecting the second base and the second upper cover, a second bolt assembly for fixing the second upper cover to the second base, a second opening and closing handle connected to the second upper cover, and a main mounting section; the first sides of the second upper cover and the second base are hinged by the second pin assembly, and the second sides are locked and fixed by the second bolt assembly; the inner end of the main mounting section is installed between the second upper cover and the second base, and the outer end of the main mounting section is connected to the corresponding main mounting section on the engine.

[0015] Furthermore, the fixed mounting section includes a first connecting plate for connecting to the main mounting section, a first connecting shaft vertically connected to the first connecting plate, and a first spherical bearing inner ring fixed on the outer circle of the first connecting shaft; a hollow first spherical bearing cavity is formed between the first upper cover and the first base, and the wall surface of the first spherical bearing cavity forms the outer circular surface of the first spherical bearing that cooperates with the inner ring of the first spherical bearing.

[0016] Furthermore, the cascading mounting section includes a second connecting plate for connecting to the main mounting section, a second connecting shaft vertically connected to the second connecting plate, and a second spherical bearing inner ring that is adjustable and slidably disposed on the outer circle of the second connecting shaft under the action of external force; a hollow second spherical bearing cavity is formed between the second upper cover and the second base, and the wall surface of the second spherical bearing cavity forms the outer circular surface of the second spherical bearing that cooperates with the inner ring of the second spherical bearing.

[0017] Furthermore, the auxiliary mounting bracket includes an auxiliary bracket vertically supported on the base assembly, and an auxiliary mounting section detachably fixed to the top of the auxiliary bracket; the auxiliary mounting section is used to connect with the auxiliary mounting section on the corresponding side of the middle and rear section of the engine, and the auxiliary mounting section is slightly movable along the engine axis in front and back, inward and outward in the radial direction, and up and down in the vertical direction.

[0018] Furthermore, the auxiliary mounting section includes a third base for connecting to the top of the auxiliary bracket via a bolt assembly, a mounting bracket, an auxiliary mounting section, an upper pin assembly, and a lower pin assembly; the lower end of the mounting bracket is hinged to the third base via the lower pin assembly, so that the mounting bracket can be radially deflected inward and outward by a set angle with the lower pin assembly as the pivot under external force; the inner end of the auxiliary mounting section is hinged to the upper end of the mounting bracket via the upper pin assembly, so that the auxiliary mounting section can be vertically deflected inward and outward by a set angle with the upper pin assembly as the pivot under external force, and the auxiliary mounting section can also be axially moved back and forth relative to the mounting bracket by a set displacement under external force, and the outer end of the auxiliary mounting section is used to connect to the auxiliary mounting section on the corresponding side of the engine.

[0019] Furthermore, the third base includes two relatively spaced first mounting lugs. The bottom end of the mounting bracket is machined to form an outward protrusion for insertion into a first mounting flange between the two first mounting lugs. Two first functional surfaces are formed between the first mounting flange and the bottom end of the mounting bracket on both sides of the first mounting flange. The top ends of the two first mounting lugs are respectively machined to form a horizontal first limiting surface and a second limiting surface that connects the two ends of the first limiting surface and is inclined. By setting the gap between the first functional surface and the first limiting surface and the angle between the second limiting surface and the horizontal plane, the angle of inward and outward deflection of the mounting bracket relative to the third base can be adjusted. The inner end of the auxiliary mounting section is machined to form two spaced second mounting lugs. The top surface of the second mounting lugs forms a second functional surface. By setting the gap between the second functional surface and the vertically arranged third limiting surface on the mounting bracket, the angle of vertical deflection of the auxiliary mounting section relative to the mounting bracket can be adjusted.

[0020] Furthermore, the main support includes a main mounting base plate detachably connected to the base assembly via bolt assemblies, a main support vertically fixed to the main mounting base plate, a main mounting upper plate fixed to the top of the main support, an inclined support and a first reinforcing rib fixedly connected between the main support and the main mounting base plate, and the main mounting upper plate is used to install the corresponding fixed mounting section or cascading mounting section; the auxiliary support includes an auxiliary mounting base plate detachably connected to the base assembly via bolt assemblies, an auxiliary support vertically fixed to the auxiliary mounting base plate, an auxiliary mounting upper plate fixed to the top of the auxiliary support, and a second reinforcing rib fixedly connected between the auxiliary support and the auxiliary mounting base plate, and the auxiliary mounting upper plate is used to install the corresponding auxiliary mounting section.

[0021] Furthermore, the underframe assembly includes a mounting bracket base and two sets of base guide rails fixed to the bottom surface of the mounting bracket base by bolt assembly. The two sets of base guide rails extend along the axial direction of the engine, and the slide rail of each set of base guide rails is fixed to the mounting platform. The fixed main mounting section bracket, the cascading main mounting section bracket, and the two sets of auxiliary mounting section brackets are respectively supported on the mounting bracket base. The mounting bracket for turboprop engine shaft test also includes a stop positioning seat fixed to one end of the mounting platform. The stop positioning seat is used to abut against one end of the base assembly to limit the position of the base assembly along the axial direction of the engine.

[0022] The present invention has the following beneficial effects:

[0023] In the turboprop engine shaft test mounting bracket of the present invention, both the fixed main mounting section bracket and the tandem main mounting section bracket form the main mounting section of the engine, located at the front end of the engine, and are used for the installation connection of two main mounting sections on the cold end mounting surface of the engine. The auxiliary mounting section bracket is used for installation on the hot end mounting surface of the engine, located in the middle and rear section of the engine, and is used for the installation connection of two auxiliary mounting sections on the hot end mounting surface of the engine. The main mounting section bracket, the tandem main mounting section bracket, and the auxiliary mounting section bracket are all fixed to the base frame assembly by bolt assemblies, and the base frame assembly is slidably mounted on the mounting platform, thereby forming a mounting bracket with a stable structure, reliable support, and the ability to slide relative to the mounting platform as needed. In the mounting bracket of the present invention, the fixed main mounting section bracket is the mounting base point of the engine mounting bracket, and it does not move after it is fixed. During the test, the tandem main mounting section bracket compensates for the small radial traverse movement. The radial thermal expansion of the engine front end is compensated by the auxiliary mounting bracket through slight axial forward and backward, radial inward and outward, and vertical up and down movements. This compensates for the engine's axial and radial thermal expansion, as well as slight axial sway (±2°), thereby eliminating the additional load caused by the four support points on the engine not being on the same plane and shielding the resonance frequency generated between the test bench and the engine. In addition, the engine shaft test mounting bracket described in this invention has been successfully applied to the debugging, break-in, vibration measurement, and 60-hour, 150-hour, and 1000-hour life assessment tests of multiple advanced turboprop engines' dynamic shaft test benches. The engine mounting bracket has been verified by numerous tests on the shaft test benches of an advanced turboprop engine. The mounting bracket is convenient to install, safe and reliable, and the engine runs stably during the test process without test bench resonance, which can well ensure the smooth progress of the test. The test results of this engine mounting bracket have been recognized by the engine user department.

[0024] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0025] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0026] Figure 1 This is a schematic diagram of the spatial structure of the mounting frame for the turboprop engine shaft test according to a preferred embodiment of the present invention;

[0027] Figure 2 yes Figure 1 Schematic diagram of the spatial structure of the centrally fixed main mounting section;

[0028] Figure 3 yes Figure 2 A schematic diagram of the spatial structure of the first base in the middle;

[0029] Figure 4 yes Figure 2 Schematic diagram of the spatial structure of the first upper cover;

[0030] Figure 5 yes Figure 2 Schematic diagram of the spatial structure of the fixed installation section;

[0031] Figure 6 yes Figure 2 Schematic diagram of the spatial structure of the first pin assembly;

[0032] Figure 7 yes Figure 1 Schematic diagram of the spatial structure of the main mounting section of the central cascading motor;

[0033] Figure 8 yes Figure 7 A schematic diagram of the spatial structure of the second base;

[0034] Figure 9 yes Figure 7 Schematic diagram of the spatial structure of the second upper cover;

[0035] Figure 10 yes Figure 7 Schematic diagram of the spatial structure of the intermediate cascading installation section;

[0036] Figure 11 yes Figure 1 Schematic diagram of the spatial structure of the auxiliary installation section;

[0037] Figure 12 yes Figure 11 A schematic diagram of the spatial structure of the third base;

[0038] Figure 13 yes Figure 11 A schematic diagram of the spatial structure of the mounting bracket;

[0039] Figure 14 yes Figure 11 Schematic diagram of the spatial structure of the auxiliary installation section;

[0040] Figure 15 yes Figure 1 Schematic diagram of the spatial structure of the main support frame;

[0041] Figure 16 yes Figure 1 A schematic diagram of the spatial structure of the auxiliary support.

[0042] Legend:

[0043] 1. Fixed main mounting section; 11. First base; 12. First pin assembly; 121. Pin body; 122. Pin; 13. First top cover; 14. Fixed mounting section; 141. First connecting plate; 142. First connecting shaft; 143. Inner ring of first spherical bearing; 15. First bolt assembly; 16. First opening and closing handle;

[0044] 2. Main mounting section; 21. Second base; 22. Second pin assembly; 23. Second top cover; 24. Main mounting section; 241. Second connecting plate; 242. Second connecting shaft; 243. Inner ring of second spherical bearing; 25. Second bolt assembly; 26. Second opening and closing handle;

[0045] 3. Auxiliary mounting section; 31. Third base; 311. First mounting lug; 312. First limiting surface; 313. Second limiting surface; 32. Mounting bracket; 321. First functional surface; 322. Third limiting surface; 33. Auxiliary mounting section; 331. Second mounting lug; 332. Second functional surface; 34. Upper pin assembly; 35. Lower pin assembly;

[0046] 4. Main support; 41. Main mounting base plate; 42. Diagonal brace; 43. Main support; 44. Main mounting top plate; 45. First reinforcing rib;

[0047] 5. Auxiliary bracket; 51. Auxiliary mounting base plate; 52. Auxiliary support; 53. Auxiliary mounting top plate; 54. Second reinforcing rib;

[0048] 6. Mounting bracket base;

[0049] 7. Base guide rail;

[0050] 8. Stop and positioning seat. Detailed Implementation

[0051] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0052] Those skilled in the art will understand that, unless specifically stated otherwise, the term "comprising" as used in this specification means the presence of the stated features, integers, steps, operations, components, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, components, and / or combinations thereof. It should be understood that when we say a component is "connected" to another component, it can be directly connected to the other component or connected via an intermediate component. The term "and / or" as used herein includes all or any unit and all combinations of one or more associated listed items. The terms "first" and "second," etc., in this specification and claims are used to distinguish different objects, not to describe a particular order.

[0053] Reference Figure 1 A preferred embodiment of the present invention provides a mounting bracket for a turboprop engine shaft test, comprising: a base frame assembly adjustablely slidable along the axial direction of the engine to be mounted on a mounting platform; and a fixed main mounting section bracket, a traverse main mounting section bracket, and two sets of auxiliary mounting section brackets vertically supported on the base frame assembly. The fixed and traverse main mounting section brackets are located at the front section of the engine and are spaced apart relative to each other along the width direction of the base frame assembly, for connection to two main mounting sections on both sides of the engine's front end, respectively. The fixed main mounting section bracket is fixedly positioned to form the mounting base point of the mounting bracket, while the traverse main mounting section bracket is traversely positioned along the radial direction of the engine to compensate for the radial thermal expansion of the engine's front end. The two sets of auxiliary mounting section brackets are located at the middle and rear sections of the engine and are spaced apart relative to each other along the width direction of the base frame assembly, for connection to two auxiliary mounting sections on both sides of the engine's middle and rear ends, respectively. The two sets of auxiliary mounting section brackets are slightly traversely positioned along the axial direction of the engine (front-back), radially (inward-outward), and vertically (up-down), to compensate for the axial and radial thermal expansion of the engine.

[0054] In the turboprop engine shaft test mounting bracket of the present invention, both the fixed main mounting section bracket and the tandem main mounting section bracket form the main mounting section of the engine, located at the front end of the engine, and are used for the installation connection of two main mounting sections on the cold end mounting surface of the engine. The auxiliary mounting section bracket is used for installation on the hot end mounting surface of the engine, located in the middle and rear section of the engine, and is used for the installation connection of two auxiliary mounting sections on the hot end mounting surface of the engine. The main mounting section bracket, the tandem main mounting section bracket, and the auxiliary mounting section bracket are all fixed to the base frame assembly by bolt assemblies, and the base frame assembly is slidably mounted on the mounting platform, thereby forming a mounting bracket with a stable structure, reliable support, and the ability to slide relative to the mounting platform as needed. In the mounting bracket of the present invention, the fixed main mounting section bracket is the mounting base point of the engine mounting bracket, and it does not move after it is fixed. During the test, the tandem main mounting section bracket compensates for the small radial traverse movement. The radial thermal expansion of the engine front end is compensated by the auxiliary mounting bracket through slight axial forward and backward, radial inward and outward, and vertical up and down movements. This compensates for the engine's axial and radial thermal expansion, as well as slight axial sway (±2°), thereby eliminating the additional load caused by the four support points on the engine not being on the same plane and shielding the resonance frequency generated between the test bench and the engine. In addition, the engine shaft test mounting bracket described in this invention has been successfully applied to the debugging, break-in, vibration measurement, and 60-hour, 150-hour, and 1000-hour life assessment tests of multiple advanced turboprop engines' dynamic shaft test benches. The engine mounting bracket has been verified by numerous tests on the shaft test benches of an advanced turboprop engine. The mounting bracket is convenient to install, safe and reliable, and the engine runs stably during the test process without test bench resonance, which can well ensure the smooth progress of the test. The test results of this engine mounting bracket have been recognized by the engine user department.

[0055] Optionally, such as Figure 1 , Figure 2 and Figure 7 As shown, the fixed main mounting section bracket and the traverse main mounting section bracket each include a main bracket 4 vertically supported on the base frame assembly. The fixed main mounting section bracket also includes a fixed main mounting section 1 connected to the top of the corresponding main bracket 4, and the traverse main mounting section bracket also includes a traverse main mounting section 2 connected to the top of the corresponding main bracket 4. The fixed main mounting section 1 and the traverse main mounting section 2 are used to connect to two main mounting sections on both sides of the front end of the engine, respectively. The fixed main mounting section 1 is fixedly set to form the mounting base point of the mounting bracket, and the traverse main mounting section 2 is set to move slightly radially along the engine.

[0056] In this optional solution, such as Figure 2-4As shown, the fixed main mounting section 1 includes a first base 11 connected to the top of a corresponding main bracket 4 via a bolt assembly, a first upper cover 13 cooperating with the first base 11, a first pin assembly 12 for connecting the first base 11 and the first upper cover 13, a first bolt assembly 15 for fixing the first upper cover 13 to the first base 11, a first opening and closing handle 16 connecting the first upper cover 13, and a fixed mounting section 14. The first sides of the first upper cover 13 and the first base 11 are hinged by the first pin assembly 12, and the second sides are locked and fixed by the first bolt assembly 15; in this optional solution, such as... Figure 6 As shown, the first pin assembly 12 includes a pin body 121 for connecting and fixing the first base 11 and the first upper cover 13, and a pin 122 mounted on the pin body 121. The pin 122 is used to prevent the pin body 121 from moving out of place. The inner end of the fixed mounting section 14 is used to be installed between the first upper cover 13 and the first base 11, and the outer end of the fixed mounting section 14 is used to connect with the main mounting section on the corresponding side of the engine.

[0057] Preferably, such as Figure 3-5 As shown, the fixed mounting section 14 includes a first connecting plate 141 for connection with the main mounting section, a first connecting shaft 142 perpendicularly connected to the first connecting plate 141, and a first spherical bearing inner ring 143 fixed on the outer circle of the first connecting shaft 142. A hollow first spherical bearing cavity is formed between the first upper cover 13 and the first base 11, and the wall surface of the first spherical bearing cavity forms the outer spherical surface of the first spherical bearing that cooperates with the inner ring 143 of the first spherical bearing. During engine installation, the first upper cover 13 is opened, and the first upper cover 13 is rotated 120° about the pin body 121 as the axis. The bearing portion of the fixed mounting section 14, which is pre-connected to the main mounting section of the engine, is installed in the first spherical bearing cavity. Then the first upper cover 13 is closed, and the first base 11 and the first upper cover 13 are connected and fastened with the first bolt assembly 15 to complete the installation of the main mounting section of the engine. In this preferred embodiment, the design of the fixed main mounting section 1 adopts a spherical bearing method. The inner surfaces of the first base 11 and the first upper cover 13 form the outer spherical surface of the spherical bearing, and the inner ring 143 of the first spherical bearing of the fixed mounting section 14 is the inner spherical surface. When the first base 11 and the first upper cover 13 are fixed, the fixed mounting section 14 can rotate and swing slightly, thereby eliminating the thermal expansion of the engine and the additional load caused by the installation.

[0058] In this optional solution, such as Figure 7-9As shown, the main mounting section 2 includes a second base 21 connected to the top of a corresponding main bracket 4 via a bolt assembly, a second upper cover 23 cooperating with the second base 21, a second pin assembly 22 for connecting the second base 21 and the second upper cover 23, a second bolt assembly 25 for fixing the second upper cover 23 to the second base 21, a second opening and closing handle 26 connecting the second upper cover 23, and a main mounting section 24. The first sides of the second upper cover 23 and the second base 21 are hinged by the second pin assembly 22, and their second sides are locked together by the second bolt assembly 25. The inner end of the main mounting section 24 is installed between the second upper cover 23 and the second base 21, and the outer end of the main mounting section 24 is connected to the corresponding main mounting section on the engine. In this optional embodiment, the structure and function of the second pin assembly 22 are the same as those of the first pin assembly 12.

[0059] Preferably, such as Figure 8-10 As shown, the traverse mounting section 24 includes a second connecting plate 241 for connection with the main mounting section, a second connecting shaft 242 vertically connected to the second connecting plate 241, and a second spherical bearing inner ring 243 adjustablely slidably disposed on the outer circle of the second connecting shaft 242 under external force. A hollow second spherical bearing cavity is formed between the second upper cover 23 and the second base 21, and the wall surface of the second spherical bearing cavity forms the outer circumferential surface of the second spherical bearing that cooperates with the second spherical bearing inner ring 243. During engine installation, the second upper cover 23 is opened, and the second upper cover 23 is rotated 120° about the second pin assembly 22. The second spherical bearing inner ring 243 of the traverse mounting section 24, which is pre-fixed to the main mounting section of the engine, is installed in the second spherical bearing cavity. Then the second upper cover 23 is closed, and the second base 21 and the second upper cover 23 are connected and tightened with the second bolt assembly 25 to complete the installation of the engine traverse main mounting section 2. In this preferred embodiment, the design of the traverse main mounting section 2 adopts a spherical bearing. The inner surfaces of the second base 21 and the second upper cover 23 form the outer spherical surface of the spherical bearing, and the spherical part of the inner ring 243 of the second spherical bearing is divided into the inner spherical surface. The inner ring 243 of the second spherical bearing can slide relative to the second connecting shaft 242 under the action of external force, thereby enabling the traverse mounting section 24 to have a telescopic function to compensate for the radial thermal expansion of the engine mounting section. At the same time, when the second base 21 and the second upper cover 23 are fixed, the traverse mounting section 24 can rotate and swing slightly to eliminate the thermal expansion of the engine and the additional load caused by the installation.

[0060] When the engine needs to be installed, connect the fixed mounting section 14 and the traverse mounting section 24 to the main mounting sections on both sides of the engine in advance, and then hoist the engine for installation. During installation, open the first upper cover 13 and the second upper cover 23 in advance. After the engine is hoisted into place, first fix the fixed mounting section 14 between the first base 11 and the first upper cover 13. Then, adjust the position of the inner ring 243 of the second joint bearing on the second connecting shaft 242 according to the different lateral widths of the same model or different models of the engine, so as to adjust the position of the inner ring 243 of the second joint bearing relative to the second joint bearing cavity. Finally, the second upper cover 23 is closed to fix the tandem mounting section 24. Thus, in this application, the mounting section of the mounting bracket has high flexibility, which facilitates engine installation and disassembly, thereby improving work efficiency and reducing working time. At the same time, for engines of the same model but different sizes, and different models but different sizes, since the main bodies of both the fixed main mounting section 1 and the tandem main mounting section 2 are fixed, only the tandem mounting section 24 is adjustable, so the same model of engine can be exempted from centering, while different models of engines are simple and convenient to center. Moreover, the mounting bracket of this application is safe and reliable and can be used for testing multiple engine models.

[0061] Optionally, such as Figure 1 and Figure 11 As shown, the auxiliary mounting bracket includes an auxiliary bracket 5 vertically supported on the base assembly, and an auxiliary mounting section 3 detachably fixed to the top of the auxiliary bracket 5. The auxiliary mounting section 3 is used to connect with the auxiliary mounting section 33 on the corresponding side of the middle and rear section of the engine, and the auxiliary mounting section 3 is slightly movable along the engine axis in front and back, inward and outward in the radial direction, and up and down in the vertical direction.

[0062] In this optional solution, such as Figure 11As shown, the auxiliary mounting section 3 includes a third base 31 for connection to the top of the auxiliary bracket 5 via bolt assemblies, a mounting bracket 32, an auxiliary mounting section 33, an upper pin assembly 34, and a lower pin assembly 35. The lower end of the mounting bracket 32 ​​is hinged to the third base 31 via the lower pin assembly 35, allowing the mounting bracket 32 ​​to deflect radially inward and outward by a set angle with the lower pin assembly 35 as the pivot under external force. The inner end of the auxiliary mounting section 33 is hinged to the upper end of the mounting bracket 32 ​​via the upper pin assembly 34, allowing the auxiliary mounting section 33 to deflect vertically upward and downward by a set angle with the upper pin assembly 34 as the pivot under external force. Simultaneously, the auxiliary mounting section 33 can also move axially back and forth relative to the mounting bracket 32 ​​by a set displacement under external force. The outer end of the auxiliary mounting section 33 is used to connect to the corresponding auxiliary mounting section on the engine. During engine installation, rotate the pin assembly 35 below the mounting bracket 32 ​​outward to open it to a certain degree. Adjust the engine auxiliary mounting end face to the same height as the auxiliary mounting section 3. Then, rotate the pin assembly 35 below the mounting bracket 32 ​​inward to the installation opening. Rotate the upper pin assembly 34 up and down to adjust the angle of the auxiliary mounting section 33 so that its mounting surface is aligned with the engine mounting surface. Connect with bolt assemblies to complete the installation of the engine auxiliary mounting section (there are two engine auxiliary mounting sections; one can be installed first, then the other).

[0063] Preferably, such as Figures 12-14 As shown, the third base 31 includes two first mounting lugs 311 arranged at relative intervals. The bottom end of the mounting bracket 32 ​​is machined to form an outward protrusion for insertion into a first mounting flange between the two first mounting lugs 311. Two first functional surfaces 321 are formed between the first mounting flange and the bottom end of the mounting bracket 32, located on both sides of the first mounting flange. The top ends of the two first mounting lugs 311 are respectively machined to form a horizontal first limiting surface 312 and a second limiting surface 313 that connects the two ends of the first limiting surface 312 and is inclined. The angle of inward and outward deflection of the mounting bracket 32 ​​relative to the third base 31 can be adjusted by setting the gap between the first functional surface 321 and the first limiting surface 312 and the angle between the second limiting surface 313 and the horizontal plane. The inner end of the auxiliary mounting section 33 is machined to form two spaced second mounting lugs 331. The top surface of the second mounting lugs 331 forms a second working surface 332. By setting the gap between the second working surface 332 and the third limiting surface 322 vertically arranged on the mounting bracket 32, the angle of vertical deflection of the auxiliary mounting section 33 relative to the mounting bracket 32 ​​can be adjusted.

[0064] In this preferred embodiment, the auxiliary mounting section 3 is designed with a shaft connection. The mounting bracket 32 ​​and the third base 31 are connected by a lower pin assembly 35. The lower pin assembly 35 of the mounting bracket 32 ​​rotates left and right (inward and outward) by a certain angle, and can be rotated outward to open a certain degree, facilitating the installation of the engine auxiliary mounting section. The auxiliary mounting section 33 is connected to the mounting bracket 32 ​​by an upper pin assembly 34. The upper pin assembly 34 of the auxiliary mounting section 33 rotates up and down by a certain angle, facilitating the connection between the auxiliary mounting section 33 and the engine auxiliary mounting end face. A certain gap is left between the mounting bracket 32 ​​and the installation mating surface of the auxiliary mounting section 33, facilitating the back-and-forth movement of the upper pin assembly 34 of the auxiliary mounting section 33. The auxiliary mounting section 3 adopts a two-shaft connection, with six degrees of freedom in the front, back, left, right (inward and outward), up, and down directions. This can compensate for the thermal expansion of the engine at the auxiliary mounting section and eliminate the additional load caused by the installation of the auxiliary mounting section.

[0065] Optionally, such as Figure 1 and Figure 15 As shown, the main bracket 4 includes a main mounting base plate 41 that is detachably connected to the base assembly via bolt assembly, a main support 43 that is vertically fixed to the main mounting base plate 41, a main mounting upper plate 44 fixed to the top of the main support 43, an inclined support 42 and a first reinforcing rib 45 that are fixedly connected between the main support 43 and the main mounting base plate 41. The main mounting upper plate 44 is used to install the corresponding fixed mounting section 14 or the traverse mounting section 24.

[0066] In this optional solution, such as Figure 15 As shown, the main bracket 4 is fixed using diagonal supports 42 and a first reinforcing rib 45, instead of using a crossbeam connected to adjacent main brackets 4 and / or auxiliary brackets 5. This provides more space for engine installation, facilitates engine installation, avoids interference between engine pipes and cables and the mounting bracket, and also facilitates the replacement of engine accessories on the mounting bracket, saving time and reducing the workload of moving the engine up and down the mounting platform; at the same time, as Figure 15 As shown, holes are drilled in the diagonal support 42 to facilitate the fixing of test pipelines and cables. The bolt mounting holes of the main mounting base plate 41 and the main mounting upper plate 44 are oblong holes and positioning holes. The oblong holes facilitate fine-tuning of the position during the installation of the main mounting section 1, the tandem main mounting section 2, and the main bracket 4. After the main mounting section 1, the tandem main mounting section 2, and the main bracket 4 are positioned and installed, the positioning holes are drilled on-site and positioning pins are inserted to prevent displacement due to long-term vibration during the test. The main mounting section 1 and the tandem main mounting section 2 are connected to the main bracket 4 by bolt assemblies, and the main bracket 4 is connected to the base assembly by bolt assemblies. This allows for direct replacement of the main mounting section 1 and the tandem main mounting section 2, or replacement of the main mounting section 1 and the tandem main mounting section 2 and the main bracket 4, sharing the base assembly, when the engine model is changed. This design facilitates engine installation, saves test costs, and improves work efficiency.

[0067] Optionally, such as Figure 1 and Figure 16 As shown, the auxiliary bracket 5 includes an auxiliary mounting base plate 51 that is detachably connected to the base assembly via bolt assembly, an auxiliary support 52 that is vertically fixed to the auxiliary mounting base plate 51, an auxiliary mounting upper plate 53 that is fixed to the top of the auxiliary support 52, and a second reinforcing rib 54 that is fixedly connected between the auxiliary support 52 and the auxiliary mounting base plate 51. The auxiliary mounting upper plate 53 is used to install the corresponding auxiliary mounting section 3.

[0068] In this optional solution, such as Figure 16 As shown, the auxiliary bracket 5 uses a second reinforcing rib 54 for fixing, instead of using a crossbeam to connect the main bracket 4 and / or adjacent auxiliary brackets 5. This provides more space for engine installation, facilitates engine installation, avoids interference between engine pipes and cables and the mounting bracket, and also facilitates the replacement of engine accessories on the mounting bracket, saving time and reducing the workload of moving the engine up and down the platform. The bolt mounting holes of the auxiliary mounting base plate 51 and the auxiliary mounting upper plate 53 are oblong holes and positioning holes. The oblong holes facilitate fine-tuning of the position during the installation of the auxiliary mounting section 3 and auxiliary bracket 5. The positioning holes are drilled on-site after the auxiliary mounting section 3 and auxiliary bracket 5 are positioned and installed, and positioning pins are inserted to prevent displacement due to long-term vibration during the test. The auxiliary mounting section 3 and auxiliary bracket 5 are connected by bolt assemblies, and the auxiliary bracket 5 is connected to the base assembly by bolt assemblies. This allows for direct replacement of the auxiliary mounting section 3 or both the auxiliary mounting section 3 and auxiliary bracket 5 when the engine model is changed. This design facilitates engine installation, saves testing costs, and improves work efficiency.

[0069] Optionally, such as Figure 1 As shown, the base assembly includes a mounting base 6 and two sets of base guide rails 7 fixed to the bottom surface of the mounting base 6 by bolt assemblies. The mounting base 6 is used to fix the engine mounting bracket, and the mounting holes of the mounting base 6 can be drilled according to actual conditions. The two sets of base guide rails 7 extend along the axial direction of the engine, and the slide rail of each set of base guide rails 7 is fixed to the mounting platform. The fixed main mounting section bracket, the cascading main mounting section bracket, and the two sets of auxiliary mounting section brackets are respectively supported on the mounting base 6. In this optional embodiment, the base guide rail 7 includes a slide rail and a hydraulic system for moving the base assembly, facilitating the installation and removal of the engine and drive shaft. The mounting bracket for turboprop engine shaft test also includes a stop positioning seat 8 fixed to one end of the mounting platform. The stop positioning seat 8 is used to abut against one end of the base assembly to limit the position of the base assembly along the axial direction of the engine.

[0070] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A mounting bracket for testing a turboprop engine shaft, characterized in that, include: The underframe assembly is adjustable and slidably mounted on the mounting platform along the axial direction of the engine to be installed, and the fixed main mounting section bracket, the cascading main mounting section bracket, and two sets of auxiliary mounting section brackets are vertically supported on the underframe assembly. The fixed main mounting section bracket and the traverse main mounting section bracket are located at the front of the engine and are spaced apart relative to each other along the width direction of the underframe assembly, so as to be connected to the two main mounting sections on both sides of the front end of the engine respectively. The fixed main mounting section bracket is fixedly set to form the mounting base point of the mounting bracket, and the traverse main mounting section bracket is traversely set along the radial direction of the engine to compensate for the radial thermal expansion of the front end of the engine. Two sets of auxiliary mounting brackets are located in the middle and rear section of the engine and are spaced apart relative to each other along the width direction of the underframe assembly. They are used to connect to two auxiliary mounting brackets on both sides of the middle and rear end of the engine, respectively. The two sets of auxiliary mounting brackets are also slightly moved along the axial front and back, radial inside and outside, and vertical up and down of the engine to compensate for the axial and radial thermal expansion of the engine. The auxiliary mounting bracket includes an auxiliary bracket (5) vertically mounted on the base assembly, and an auxiliary mounting section (3) detachably fixed to the top of the auxiliary bracket (5). The auxiliary mounting section (3) includes a third base (31) for connecting to the top of the auxiliary bracket (5) via a bolt assembly, a mounting bracket (32), an auxiliary mounting section (33), an upper pin assembly (34), and a lower pin assembly (35); the lower end of the mounting bracket (32) is hinged to the third base (31) via the lower pin assembly (35) so that the mounting bracket (32) can be deflected radially inward and outward at a set angle under the action of external force with the lower pin assembly (35) as the axis of rotation; the inner end of the auxiliary mounting section (33) is hinged to the upper end of the mounting bracket (32) via the upper pin assembly (34) so ​​that the auxiliary mounting section (33) can be deflected vertically upward and downward at a set angle with the upper pin assembly (34) as the axis of rotation under the action of external force, and the auxiliary mounting section (33) can also move axially back and forth relative to the mounting bracket (32) at a set displacement under the action of external force, and the outer end of the auxiliary mounting section (33) is used to connect to the auxiliary mounting section on the corresponding side of the engine; The third base (31) includes two first mounting lugs (311) spaced apart from each other. The bottom end of the mounting bracket (32) is machined to form an outward protrusion for insertion into a first mounting flange between the two first mounting lugs (311). Two first functional surfaces (321) are formed between the first mounting flange and the bottom end of the mounting bracket (32) on both sides of the first mounting flange. The top ends of the two first mounting lugs (311) are respectively machined to form a horizontal first limiting surface (312) and a second limiting surface (313) that connects the two ends of the first limiting surface (312) and is inclined, so as to achieve the first functional surface (321). The gap between the first limiting surface (312) and the angle between the second limiting surface (313) and the horizontal plane are used to adjust the angle of inward and outward deflection of the mounting bracket (32) relative to the third base (31); the inner end of the auxiliary mounting section (33) is machined to form two spaced second mounting lugs (331), and the top surface of the second mounting lugs (331) forms a second working surface (332), so that by setting the gap between the second working surface (332) and the vertically arranged third limiting surface (322) on the mounting bracket (32), the angle of inward and outward deflection of the auxiliary mounting section (33) relative to the mounting bracket (32) can be adjusted.

2. The mounting bracket for turboprop engine shaft test as described in claim 1, characterized in that, The fixed main mounting section bracket and the cascading main mounting section bracket each include a main bracket (4) vertically supported on the base frame assembly. The fixed main mounting section bracket also includes a fixed main mounting section (1) connected to the top of the corresponding main bracket (4). The cascading main mounting section bracket also includes a cascading main mounting section (2) connected to the top of the corresponding main bracket (4). The fixed main mounting section (1) and the moving main mounting section (2) are used to connect to the two main mounting sections on both sides of the front end of the engine, respectively. The fixed main mounting section (1) is fixedly set to form the mounting base point of the mounting bracket, and the moving main mounting section (2) is set to move slightly in the radial direction of the engine.

3. The mounting bracket for turboprop engine shaft test as described in claim 2, characterized in that, The fixed main mounting section (1) includes a first base (11) connected to the top of the corresponding main bracket (4) by a bolt assembly, a first upper cover (13) cooperating with the first base (11), a first pin assembly (12) for connecting the first base (11) and the first upper cover (13), a first bolt assembly (15) for fixing the first upper cover (13) to the first base (11), a first opening and closing handle (16) for connecting the first upper cover (13), and a fixed mounting section (14); the first side of the first upper cover (13) and the first base (11) are hinged by the first pin assembly (12), and the second side of the two are locked and fixed by the first bolt assembly (15); the inner end of the fixed mounting section (14) is used to be installed between the first upper cover (13) and the first base (11), and the outer end of the fixed mounting section (14) is used to be connected to the main mounting section on the corresponding side of the engine; The main mounting section (2) includes a second base (21) connected to the top of the corresponding main bracket (4) via a bolt assembly, a second upper cover (23) cooperating with the second base (21), a second pin assembly (22) for connecting the second base (21) and the second upper cover (23), a second bolt assembly (25) for fixing the second upper cover (23) and the second base (21), a second opening and closing handle (26) for connecting the second upper cover (23), and a main mounting section (24). The first side of the second upper cover (23) and the second base (21) is hinged by the second pin assembly (22), and the second side of the two is locked and fixed by the second bolt assembly (25). The inner end of the main mounting section (24) is installed between the second upper cover (23) and the second base (21), and the outer end of the main mounting section (24) is connected to the main mounting section on the corresponding side of the engine.

4. The mounting bracket for turboprop engine shaft test as described in claim 3, characterized in that, The fixed mounting section (14) includes a first connecting plate (141) for connecting to the main mounting section, a first connecting shaft (142) vertically connected to the first connecting plate (141), and a first spherical bearing inner ring (143) fixed on the outer circle of the first connecting shaft (142). A hollow first joint bearing cavity is formed between the first upper cover (13) and the first base (11), and the wall surface of the first joint bearing cavity forms the outer circular surface of the first joint bearing that cooperates with the inner ring (143) of the first joint bearing.

5. The mounting bracket for turboprop engine shaft test as described in claim 3, characterized in that, The cascading mounting section (24) includes a second connecting plate (241) for connecting to the main mounting section, a second connecting shaft (242) vertically connected to the second connecting plate (241), and a second spherical bearing inner ring (243) that is adjustable and slidably disposed on the outer circle of the second connecting shaft (242) under the action of external force. A hollow second joint bearing cavity is formed between the second upper cover (23) and the second base (21), and the wall surface of the second joint bearing cavity forms the outer circular surface of the second joint bearing that cooperates with the inner ring (243) of the second joint bearing.

6. The mounting bracket for turboprop engine shaft test as described in claim 2, characterized in that, The auxiliary mounting section (3) is used to connect with the auxiliary mounting section (33) on the corresponding side of the middle and rear section of the engine, and the auxiliary mounting section (3) is set to move slightly forward and backward, inward and outward, and vertically along the engine axis.

7. The mounting bracket for turboprop engine shaft test as described in claim 6, characterized in that, The main bracket (4) includes a main mounting base plate (41) detachably connected to the base assembly via bolt assembly, a main support (43) vertically fixed to the main mounting base plate (41), a main mounting upper plate (44) fixed to the top of the main support (43), an inclined support (42) fixedly connected between the main support (43) and the main mounting base plate (41), and a first reinforcing rib (45). The main mounting upper plate (44) is used to install the corresponding fixed mounting section (14) or the traverse mounting section (24). The auxiliary bracket (5) includes an auxiliary mounting base plate (51) that is detachably connected to the base assembly via bolt assembly, an auxiliary support (52) that is vertically fixed to the auxiliary mounting base plate (51), an auxiliary mounting upper plate (53) that is fixed to the top of the auxiliary support (52), and a second reinforcing rib (54) that is fixedly connected between the auxiliary support (52) and the auxiliary mounting base plate (51). The auxiliary mounting upper plate (53) is used to install the corresponding auxiliary mounting section (3).

8. The mounting bracket for turboprop engine shaft test as described in claim 1, characterized in that, The underframe assembly includes a mounting base (6) and two sets of base rails (7) fixed to the bottom surface of the mounting base (6) by bolt assembly. The two sets of base rails (7) extend along the axial direction of the engine, and the slide rail of each set of base rails (7) is fixed to the mounting platform. The fixed main mounting section bracket, the cascading main mounting section bracket, and the two sets of auxiliary mounting section brackets are respectively supported on the mounting base (6). The mounting bracket for turboprop engine shaft test also includes a stop positioning seat fixed to one end of the mounting platform. The stop positioning seat is used to abut against one end of the base assembly to limit the base assembly along the axial direction of the engine.

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