Shafting test installation method for turboprop engines

Abstract

This invention discloses a method for installing a turboprop engine on a shaft stand for testing, comprising the following steps: installing a torque meter and a dynamometer; installing a drive shaft and a torque meter; installing the engine onto a mounting bracket and coaxially connecting the engine and the drive shaft, while synchronously adjusting for concentricity with the dynamometer during installation; installing the intake and exhaust systems, starter motor, engine accessories, and functional pipelines onto the engine; installing and connecting various control cables and test cables; and installing protective equipment outside the torque meter and drive shaft. This method effectively ensures the axial and radial movement of the engine, reduces radial deviation, ensures coaxiality between engines of the same model and the equipment, reduces the workload of centering, and avoids resonance caused by improper mounting bracket installation during engine testing. It also ensures normal lubrication pressure in the engine's lubrication system, significantly improving the efficiency and quality of turboprop engine testing and installation, and guaranteeing successful testing of the turboprop engine on the shaft stand.

Description

Technical Field

[0001] This invention relates to the field of turboprop engine shaft test technology, and in particular, to a turboprop engine shaft test installation method. 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 shaft bench test of this engine requires a large number of equipment and is complex, with many test parameters, control cables, and engine accessories. Therefore, the installation of equipment before the test is more extensive and demanding, and the installation of the engine and equipment is significantly different from the previous engine installation methods.

[0004] Existing turboprop engines have simple structures, limited functions, fewer testing devices, fewer test parameters, fewer cables, and fewer accessories. Their pre-test installation requirements are also relatively simple. Therefore, existing turboprop engine shaft stand test installation methods cannot meet the installation requirements before the shaft stand test of this type of turboprop engine. Thus, to ensure the smooth conduct of the shaft stand test of this turboprop engine, it is necessary to design a specific, practical, technically precise, step-by-step, easy-to-operate, safe, reliable, high-quality, and efficient test installation method that meets the requirements for the overall engine shaft stand test installation, while avoiding problems such as difficulty in engine alignment, pipeline oil leakage, excessive test vibration, and inability to establish lubricating oil pressure. Summary of the Invention

[0005] This invention provides a method for installing a turboprop engine shaft test platform to solve the technical problem that existing turboprop engine shaft test platform installation methods cannot meet the installation requirements before shaft test of this type of turboprop engine.

[0006] The technical solution adopted in this invention is as follows: A method for testing and installing a turboprop engine shaft support includes the following steps: connecting a torque meter to a dynamometer pre-fixed as a positioning reference; coaxially connecting a drive shaft to the torque meter; and connecting the engine to a mounting bracket so that the engine is coaxially connected to the drive shaft, while simultaneously adjusting the engine to be concentric with the dynamometer during installation. The mounting bracket includes fixed main mounting section brackets and cascading main mounting section brackets located on both sides of the engine's front end, and two sets of auxiliary mounting section brackets located on both sides of the engine's middle and rear sections. The fixed main mounting section brackets are fixedly installed to form the mounting base of the mounting bracket. The main mounting bracket is arranged radially along the engine, and the two sets of auxiliary mounting brackets are arranged slightly radially and vertically along the engine's axial direction (front-back, rear-backward, inward-outward, and up-down). When installing the engine, first install one main mounting section with the fixed main mounting bracket, then install the other main mounting section with the traversing main mounting bracket, and finally install the two auxiliary mounting sections with the two sets of auxiliary mounting brackets respectively. The intake and exhaust equipment, starter motor, engine accessories, and functional pipelines are respectively installed and connected to the engine. All control cables and test cables are installed and connected. Protective equipment is installed outside the torque meter and the drive shaft.

[0007] Furthermore, the specific operation of the step "installing and connecting the torque tester with the dynamometer that is pre-fixed as the positioning reference" is as follows: The torque tester includes a rotor, a stator, and a cable. During installation, the rotor is first fixedly connected to the input end of the dynamometer, and then the rotor is installed. When the rotor is installed and positioned, a feeler gauge is used to confirm the uniformity of the gap between the rotor and the stator. After the uniformity of the gap between the rotor and the stator meets the requirements, the stator is fixed. Finally, the cable is installed, and the installation of the torque tester is completed after confirming that the torque tester is working properly.

[0008] Furthermore, the specific operation of the step "coaxially connecting the drive shaft and the torque tester" is as follows: First, use a crane to lift the drive shaft to the same height as the axis of the torque tester. Then, rotate the rotor of the torque tester to adjust the rotor of the torque tester to be concentric with the mounting hole of the drive shaft. Next, install the positioning pin and fastening bolt in sequence. Then, use a torque wrench to tighten the fastening bolt to the specified torque force and remove the positioning pin. During the installation process, a support seat is installed at the other end of the drive shaft to avoid the other end of the drive shaft being suspended for a long time so that the end connected to the torque tester is continuously subjected to force.

[0009] Furthermore, the step "after installing the engine onto the mounting bracket, coaxially connect the engine to the drive shaft, and synchronously adjust its concentricity with the dynamometer during engine installation" specifically includes the following steps: replacing the engine mounting section, which specifically includes the following steps: opening the fixed mounting bracket of the engine transport vehicle; lifting the engine upwards with a crane; disassembling the two main mounting sections used for transporting the engine, and then connecting the two main mounting sections used for testing to the engine; disassembling the two auxiliary mounting sections used for transporting the engine, and then connecting the two auxiliary mounting sections used for testing to the engine; transporting the engine to the engine mounting bracket with a crane, ready for engine and mounting bracket installation; and connecting the engine and mounting bracket.

[0010] Furthermore, the fixed main mounting section bracket and the traverse main mounting section bracket each include a main bracket vertically supported on the base frame 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. The traverse main mounting section is set to move slightly in the radial direction of the engine. The auxiliary mounting section 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 to the auxiliary mounting section on the corresponding side of the middle and rear section of the engine, and the auxiliary mounting section is set to move slightly in the axial direction of the engine, radially inward and outward, and vertically upward and downward.

[0011] Furthermore, the step "connecting the engine to the mounting bracket" specifically includes the following steps: adjusting the engine's position left and right, front and back, and up and down so that the engine's two main mounting sections correspond to the fixed main mounting section and the tandem main mounting section of the mounting bracket, respectively, and the engine's two auxiliary mounting sections correspond to the two auxiliary mounting sections of the mounting bracket, respectively; first connecting one of the engine's main mounting sections to the fixed main mounting section, then connecting the other engine's main mounting section to the tandem main mounting section, and finally connecting the engine's two auxiliary mounting sections to the two auxiliary mounting sections, respectively; adjusting the engine and dynamometer to be concentric; tightening the fastening bolts of the fixed main mounting section, the tandem main mounting section, and the two auxiliary mounting sections, and securing and marking them.

[0012] Furthermore, the step "adjusting the engine and dynamometer for concentricity" specifically includes the following steps: selecting the dynamometer as the fixed device and the engine as the alignment object; installing and fixing the alignment device to the input shaft end of the dynamometer and the output shaft end of the engine; measuring the distance between the engine end face and the dynamometer end face, the distance between the dynamometer end face and the engine main mounting section end face, and the distance between the engine main mounting section end face and the auxiliary mounting section end face, as the basic parameters input into the alignment device; rotating the engine output shaft at the required angle and recording the offset between the engine and dynamometer shaft centers; if the offset between the engine and dynamometer shaft centers is greater than the test requirement value or the compensation amount of the drive shaft, the main mounting section and auxiliary mounting section of the engine need to be adjusted. Install the device in the correct position so that the offset between the engine and dynamometer shafts meets the requirements. After the offset between the engine and dynamometer shafts meets the requirements, save the alignment instrument record. Then, operate the alignment instrument again according to the above alignment steps to check whether the offset between the engine and dynamometer shafts still meets the requirements. If it does not meet the requirements, repeat the above steps to continue adjusting. If it meets the requirements, record the data and proceed to the next step. At the same time, tighten the main mounting section, the tandem main mounting section, and the two sets of auxiliary mounting sections. Again, operate the alignment instrument according to the alignment steps to check whether the offset between the engine and dynamometer shafts still meets the requirements. If it does not meet the requirements, repeat the above steps to continue adjusting. If it meets the requirements, record and save the data to complete the equipment alignment.

[0013] Furthermore, the step "connecting the intake and exhaust equipment, starter motor, engine accessories, and functional pipelines to the engine" specifically includes the following steps: connecting the intake and exhaust equipment, starter motor, engine accessories, and functional pipelines to the engine using clamps; installing positioning pins to align the installation edges; then installing the clamps, and if there is misalignment, tapping them locally with a rubber mallet until aligned, then tightening the clamps to complete the installation; for the functional pipelines, check the sealing rings for proper function before installation, and then tighten them with bolts or clamps; after installation, turn on the switch to supply air / fuel, and check for leaks. If leaks are found, troubleshooting is required, replacing parts or reinstalling until there are no leaks, thus completing the functional pipeline installation.

[0014] Furthermore, the step "Installing and connecting various control cables and test cables" specifically includes the following steps: Before installing the control cables (control cables, starter motor control cables, and AC motor cables), check for error-proof markings, the number of connectors, and the direction of the connectors, and then install them one by one; after installation, power on and check if the communication is normal. If there is any abnormality, it is necessary to troubleshoot and reinstall. If it is normal, the control cable installation is complete; for the test cables (test cables, probes, sensors, vibration test cables, probes, sensors), before installation, classify and count the test cables and probes, and then install and tighten them one by one; after installation, power on and check if the communication is normal. If there is any abnormality, it is necessary to troubleshoot and reinstall. If it is normal, the test cable installation is complete.

[0015] Further, the step "installing the protective equipment to the outside of the torque tester and the drive shaft" specifically includes the following steps: the protective cover of the protective equipment, the protective cover of the drive shaft, and the air intake protective cover are bolted and fixed to the corresponding protective positions of the equipment and ensured to be tight; after completing the step "installing the protective equipment to the outside of the torque tester and the drive shaft", the step "adding engine lubricating oil" is also included, which specifically includes the following steps: adding lubricating oil to the engine oil tank through the filler port as required; during the filling process, opening the air vents of the engine inlet and return oil pipes to remove air from the internal and external lubricating oil system pipes of the engine to prevent air lock in the engine lubricating oil system, which would cause the lubricating oil system to malfunction; after the lubricating oil is filled to the specified position, installing the lubricating oil filler port plug, closing the air vents of the inlet and return oil pipes, and completing the lubricating oil filling.

[0016] The present invention has the following beneficial effects: The working principle of the installation method of this invention is as follows: The tester installs the test dynamometer, torque meter, drive shaft, engine, intake and exhaust equipment, starter motor, engine accessories, functional pipelines, control cables, test cables, and protective equipment according to the required plan, design method, and planning steps, one by one, in an orderly, safe, high-quality, efficient, and correct manner, to the corresponding positions to ensure that the engine, all equipment, cables, instruments, etc., can work normally and the test can be carried out smoothly. The installation method of this invention is applicable to the shaft stand test of advanced turboprop engines. It solves the technical problem of difficult shaft stand installation of a certain domestic turboprop engine. In the engine installation process, the installation sequence of "first installing one main mounting section with the fixed main mounting section bracket, then installing the other main mounting section with the tandem main mounting section bracket, and finally installing the two auxiliary mounting sections with the two sets of auxiliary mounting section brackets respectively" effectively ensures the axial and radial tandem movement of the engine, while reducing the radial deviation of the engine, ensuring the coaxiality of the same model engine and equipment, reducing the amount of self-aligning work, and also avoiding resonance caused by improper mounting bracket installation during the engine test process, ensuring the smooth operation of the engine lubrication system. The oil pressure is normal, and there is no air lock, which greatly improves the efficiency and quality of the installation for testing a turboprop engine, ensuring the smooth testing of the turboprop engine on the shaft stand. Furthermore, this invention provides a clear, precise, logical, step-by-step, safe, reliable, and easy-to-operate method for installing the turboprop engine on the shaft stand for whole-engine testing. It avoids problems such as difficulty in engine alignment on the shaft stand, oil leaks in pipelines, large test vibrations, and inability to establish lubricating oil pressure. This facilitates the smooth conduct of whole-engine testing of the newly developed turboprop engine on the shaft stand and provides a reference for similar engines in shaft stand testing. In addition, this invention's testing and installation method has been successfully applied to the commissioning, break-in, vibration measurement, and 60-hour, 150-hour, and 1000-hour life assessment tests of a turboprop engine. The testing and installation method has been verified by numerous tests on the shaft stand of an advanced turboprop engine. The method is convenient, safe, and reliable, and the engine operates stably during the test process without equipment or bench resonance, ensuring the smooth progress of the test. Both the installation method and the test results have been recognized by the engine user department.

[0017] 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

[0018] 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: Figure 1This is a schematic diagram of the engine shaft test and installation equipment formed by installing the turboprop engine shaft test and installation method according to a preferred embodiment of the present invention. Figure 2 yes Figure 1 Schematic diagram of the spatial structure of the mounting bracket; Figure 3 yes Figure 2 Schematic diagram of the spatial structure of the fixed main mounting section; Figure 4 yes Figure 3 A schematic diagram of the spatial structure of the first base in the middle; Figure 5 yes Figure 3 Schematic diagram of the spatial structure of the first upper cover; Figure 6 yes Figure 3 Schematic diagram of the spatial structure of the fixed installation section; Figure 7 yes Figure 3 Schematic diagram of the spatial structure of the first pin assembly; Figure 8 yes Figure 2 Schematic diagram of the spatial structure of the main mounting section of the central cascading motor; Figure 9 yes Figure 8 A schematic diagram of the spatial structure of the second base; Figure 10 yes Figure 8 Schematic diagram of the spatial structure of the second upper cover; Figure 11 yes Figure 8 Schematic diagram of the spatial structure of the intermediate cascading installation section; Figure 12 yes Figure 2 Schematic diagram of the spatial structure of the auxiliary installation section; Figure 13 yes Figure 12 A schematic diagram of the spatial structure of the third base; Figure 14 yes Figure 12 A schematic diagram of the spatial structure of the mounting bracket; Figure 15 yes Figure 12 Schematic diagram of the spatial structure of the auxiliary installation section.

[0019] Legend: 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; 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; 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; 4. Main bracket; 5. Auxiliary bracket; 6. Mounting bracket base; 7. Base guide rail; 8. Stop and positioning seat; 91. Dynamometer; 92. Torque meter; 93. Drive shaft; 94. Engine; 95. Mounting bracket; 96. Intake and exhaust equipment; 97. Starter motor; 98. Engine accessories; 99. Functional piping; 100. Control cables; 101. Test cables; 102. Protective equipment. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] Reference Figure 1 A preferred embodiment of the present invention provides a method for testing and installing a turboprop engine shaft support, comprising the following steps: Install and connect the torque tester 92 to the dynamometer 91, which is pre-fixed as a positioning reference. The drive shaft 93 and the torque meter 92 are coaxially connected; After the engine 94 is installed and connected to the mounting bracket 95, the engine 94 is coaxially connected to the drive shaft 93, and the engine 94 is synchronously adjusted to be concentric with the dynamometer 91 during the installation process. The mounting bracket 95 includes a fixed main mounting section bracket and a traverse main mounting section bracket located on both sides of the front end of the engine 94, and two sets of auxiliary mounting section brackets located on both sides of the middle and rear section of the engine 94. The fixed main mounting section brackets are fixedly installed to form the mounting base of the mounting bracket 95. The traverse main mounting section brackets are arranged radially along the engine 94, and the two sets of auxiliary mounting section brackets are arranged with slight traverse movement along the axial direction of the engine 94, radially inward and outward, and vertically up and down. When installing the engine 94, first install one main mounting section to the fixed main mounting section bracket, then install the other main mounting section to the traverse main mounting section bracket, and finally install the two auxiliary mounting sections to the two sets of auxiliary mounting section brackets respectively. Install and connect the intake and exhaust equipment 96, starter motor 97, engine accessories 98 and functional pipelines 99 to the engine 94 respectively; Install and connect each control cable 100 and each test cable 101; The protective device 102 is installed outside the torque meter 92 and the drive shaft 93.

[0023] In the turboprop engine shaft test installation method of the present invention, the engine 94 is installed and fixed to the mounting bracket 95. In the mounting bracket 95, the fixed main mounting section bracket is the mounting base point of the engine mounting bracket. After it is installed and fixed, it will not move. During the test, the main mounting section bracket is moved in a small radial direction to compensate for the radial thermal expansion of the engine front end. The auxiliary mounting section bracket is moved in a small axial direction, radial direction, and vertical direction to compensate for the axial and radial thermal expansion of the engine and the small axial sway (±2°). This eliminates the additional load caused by the four support points on the engine 94 not being on the same plane and shields the resonance frequency generated by the test bench and the engine. The working principle of the installation method of this invention is as follows: The tester installs the test dynamometer 91, torque meter 92, drive shaft 93, engine 94, intake and exhaust equipment 96, starter motor 97, engine accessories 98, functional pipelines 99, control cables 100, test cables 101, and protective equipment 102, etc., according to the required plan, design method, and planning steps, and installs them one by one, in an orderly, safe, high-quality, efficient, and correct manner to their respective positions to ensure that the engine 94, all equipment, cables, instruments, etc., can work normally and the test can be carried out smoothly. The installation method of this invention is applicable to the shaft support of advanced turboprop engines. The experiment solved the technical problem of difficult installation of a certain turboprop engine on the shaft support in China. During the installation of the engine (model 94), the following installation sequence was adopted: first, install one main mounting section with the fixed main mounting section bracket; then, install the other main mounting section with the tandem main mounting section bracket; finally, install the two auxiliary mounting sections with the two sets of auxiliary mounting section brackets respectively. This effectively ensured the axial and radial traverse of the engine, reduced radial deviation, ensured the coaxiality of engines and equipment of the same model, reduced the workload of centering, and also avoided problems caused by improper mounting bracket installation during engine testing. The invention achieves resonance, ensuring normal lubricating oil pressure in the engine's lubrication system and preventing air locks, thereby significantly improving the efficiency and quality of the turboprop engine's test installation and guaranteeing successful testing on the shaft stand. Furthermore, this invention provides a clear, technically precise, logically sound, step-by-step, safe, reliable, and easy-to-operate method for installing turboprop engines on the shaft stand for whole-engine testing. It avoids problems such as difficulty in engine alignment on the shaft stand, oil leaks in pipelines, excessive test vibration, and inability to establish lubricating oil pressure, facilitating the development of new turboprop engines. The engine successfully underwent a full-engine test on the shaft stand, providing a reference for similar engines to be tested and installed on the shaft stand. In addition, the test installation method of this invention has been successfully applied to the commissioning test, break-in, vibration measurement, and 60-hour, 150-hour, and 1000-hour life assessment tests of a certain turboprop engine. The test installation method has been verified by numerous tests on the shaft stand of an advanced turboprop engine. The test installation method is convenient to operate, safe and reliable. The engine runs stably during the test process, without equipment or bench resonance, which can well ensure the smooth progress of the test. The installation method and test results have been recognized by the engine user department.

[0024] Optionally, such as Figure 1 As shown, the specific operation of step "installing and connecting the torque tester 92 with the dynamometer 91, which is pre-fixed as a positioning reference" is as follows: The torque tester 92 includes a rotor, a stator, and cables. During installation, the rotor is first fixedly connected to the input end of the dynamometer 91, and then the rotor is installed. When the rotor is installed and positioned, a feeler gauge is used to confirm the uniformity of the gap between the rotor and the stator. After the uniformity of the gap between the rotor and the stator meets the requirements, the stator is fixed. Finally, the cables are installed, and the installation of the torque tester 92 is completed after confirming that the torque tester 92 is working properly.

[0025] Optionally, such as Figure 1 As shown, the specific operation of step "coaxially connecting the drive shaft 93 and the torque meter 92" is as follows: First, use a crane to lift the drive shaft 93 to the same height as the axis of the torque tester 92. Then, rotate the rotor of the torque tester 92 to adjust the rotor of the torque tester 92 to be concentric with the mounting hole of the drive shaft. Next, install the locating pin and fastening bolt in sequence. Then, use a torque wrench to tighten the fastening bolt to the specified torque force and remove the locating pin. During the installation process, install a support seat at the other end of the drive shaft 93 to prevent the other end of the drive shaft 93 from being suspended for a long time so that the end connected to the torque tester 92 is continuously subjected to force.

[0026] Optionally, such as Figure 1 As shown, the step "after installing the engine 94 onto the mounting bracket 95, make the engine 94 coaxially connected with the drive shaft 93, and synchronously adjust the engine 94 to be concentric with the dynamometer 91 during the installation process" specifically includes the following steps: The specific steps for replacing the mounting section of engine 94 include: opening the fixed mounting bracket 95 of the engine 94 transport vehicle; lifting engine 94 upwards using a crane; disassembling the two main mounting sections used for transport on engine 94, and then connecting the two test main mounting sections to engine 94 (the main mounting sections are bolted to engine 94; the bolts are installed and tightened diagonally to ensure each bolt is correctly installed and without thread damage); disassembling the two auxiliary mounting sections 3 used for transport on engine 94, and then connecting the two test auxiliary mounting sections to engine 94; and using a crane to move engine 94 to engine 94 mounting bracket 95 for installation of engine 94 and mounting bracket 95. Install and connect the engine 94 to the mounting bracket 95.

[0027] Optionally, such as Figure 2 , Figure 3 and Figure 8As shown, the fixed main mounting section bracket and the traverse main mounting section bracket each include a main bracket 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, and the traverse main mounting section bracket also includes a traverse main mounting section 2 connected to the top of the corresponding main bracket. 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 94, respectively. The fixed main mounting section 1 is fixedly set to form the mounting base point of the mounting bracket 95, and the traverse main mounting section 2 is set to move slightly radially along the engine 94.

[0028] In this optional solution, such as Figure 3-5 As 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 7 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.

[0029] Preferably, such as Figure 4-6As 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.

[0030] In this optional solution, such as Figure 8-10 As 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.

[0031] Preferably, such as Figure 9-11As 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.

[0032] 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.

[0033] Optionally, such as Figure 2 and Figure 12As shown, the auxiliary mounting bracket includes an auxiliary bracket vertically supported on the base assembly, and an auxiliary mounting section 3 detachably fixed to the top of the auxiliary bracket. The auxiliary mounting section 3 is used to connect with the auxiliary mounting section on the corresponding side of the middle and rear section of the engine 94, and the auxiliary mounting section 3 is slightly movable along the axial direction of the engine 94, in the radial direction, and vertically.

[0034] In this optional solution, such as Figure 12 As 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).

[0035] Preferably, such as Figures 13-15As 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.

[0036] 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.

[0037] Optionally, such as Figure 2As 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.

[0038] The step "connecting engine 94 to mounting bracket 95" specifically includes the following steps: Adjust the position of engine 94 left and right, forward and backward, and up and down so that the two main mounting sections of engine 94 correspond to the fixed main mounting section 1 and the moving main mounting section 2 of mounting bracket 95 respectively, and the two auxiliary mounting sections of engine 94 correspond to the two auxiliary mounting sections 3 of mounting bracket 95 respectively. First, connect one main mounting section of engine 94 to fixed main mounting section 1, then connect the other main mounting section of engine 94 to tandem main mounting section 2, and finally connect the two auxiliary mounting sections of engine 94 to the two auxiliary mounting sections 3 respectively. Adjust the engine 94 to be concentric with the dynamometer 91; Tighten the bolts securing the main mounting section 1, the tandem main mounting section 2, and the two auxiliary mounting sections 3, and secure and mark them to prevent the mounting bolts on the engine from loosening during the test, while also facilitating visual inspection.

[0039] Optionally, the step "adjusting the engine 94 and dynamometer 91 to be concentric" specifically includes the following steps: The dynamometer 91 is the fixed equipment reference point, and the engine 94 is the alignment object; Install and fix the centering device to the input shaft end of the dynamometer 91 and the output shaft end of the engine 94; The distances between the end face of engine 94 and the end face of dynamometer 91, the distances between the end face of dynamometer 91 and the end face of main mounting section of engine 94, and the distances between the end face of main mounting section of engine 94 and the end face of auxiliary mounting section are measured and used as the basic parameters for inputting into the centering instrument. Rotate the output shaft of engine 94 at the required angle and record the offset angle and radial offset distance between engine 94 and the axis of dynamometer 91. If the offset between the engine 94 and the dynamometer 91 shafts is greater than the test requirement or the compensation amount of the drive shaft 93, the installation positions of the main mounting section and auxiliary mounting section of the engine 94 need to be adjusted so that the offset between the engine 94 and the dynamometer 91 shafts meets the requirements. After the offset between the shafts of engine 94 and dynamometer 91 meets the requirements, save the centering instrument record, and then operate the centering instrument again according to the above centering steps to check whether the offset between the shafts of engine 94 and dynamometer 91 still meets the requirements. If it does not meet the requirements, repeat the above steps to continue adjusting. If it meets the requirements, record the data and proceed to the next step. At the same time, fasten and fix the main mounting section 1, the cascading main mounting section 2, and the two sets of auxiliary mounting sections 3; Follow the alignment steps again to operate the alignment instrument to recheck whether the offset between the shaft center of engine 94 and dynamometer 91 still meets the requirements. If it does not meet the requirements, repeat the above steps to continue adjusting. If it meets the requirements, record and save the data to complete the equipment alignment.

[0040] Optionally, such as Figure 1 As shown, the step "connecting the intake and exhaust equipment 96, starter motor 97, engine accessories 98, and functional pipes 99 to the engine 94" specifically includes the following steps: The intake and exhaust equipment 96, starter motor 97, engine accessories 98 and functional pipelines 99 are respectively connected to the engine 94 by clamps; Install the locating pins and align the installation edges. Then install the clamps. If there is any misalignment, you can use a rubber mallet to tap the area until it is aligned. Then tighten the clamps to complete the installation. Functional pipeline 99 mainly includes fuel line, lubricating oil line, hydraulic oil line, vent line and vent line. Before installation, check whether the sealing ring is normal. After it is normal, tighten the installation with bolts or clamps. After installation, turn on the switch to supply gas / oil and check for leaks. If there are leaks, troubleshooting, replacement of parts, or reinstallation is required until there are no leaks. This completes the installation of the functional piping.

[0041] Optionally, such as Figure 1 As shown, the step "Installing and connecting each control cable 100 and each test cable 101" specifically includes the following steps: Before installing the control cables, which mainly include the engine 94 control cable, starter motor 97 control cable and AC motor cable, check for error prevention markings, the number of connectors, and the direction of the connectors, and then install them one by one. After installation, power on and check if the communication is normal. If there is any abnormality, it is necessary to troubleshoot and reinstall. If it is normal, the control cable installation is complete. Test cable 101 mainly includes test cables 101, probes, and sensors for various parameters of engine 94, and vibration test cables 101, probes, and sensors. Before installation, test cables 101 and probes are classified and counted, and then installed and tightened one by one. After installation, power on and check if the communication is normal. If there is any abnormality, troubleshooting and reinstallation are required. If it is normal, the installation of test cable 101 is complete.

[0042] Optionally, such as Figure 1 As shown, the step "installing the protective device 102 to the outside of the torque tester 92 and the drive shaft 93" specifically includes the following steps: The protective device 102 mainly includes the torque tester 92 protective cover, the drive shaft protective cover and the air intake protective cover, which are installed and fixed to the protective positions of the corresponding equipment with bolts and ensured to be tight.

[0043] Preferably, after completing the step of "installing the protective device 102 onto the outside of the torque meter 92 and the drive shaft 93", the method further includes the step of adding lubricating oil to the engine 94, which specifically includes the following steps: Add lubricating oil to the engine's 94 oil tank through the filler neck as required; During the refueling process, open the air vents of the engine 94 inlet and outlet oil pipes to remove air from the internal and external lubricating oil system lines of the engine 94, preventing air lock in the engine 94 lubricating oil system and causing the lubricating oil system to malfunction. After filling the lubricating oil to the specified level, install the lubricating oil filling port plug, close the air vents of the inlet and outlet oil pipes, and the lubricating oil filling is complete.

[0044] This invention provides a clear, precise, logical, and efficient method for installing a turboprop engine on a test bench. It avoids problems such as difficulty in engine alignment, oil leaks in pipelines, excessive test vibration, and inability to establish lubricating oil pressure. Furthermore, this installation method is applicable to the pre-test installation of different models of turboprop engines on a test bench, facilitating the smooth conduct of complete engine tests on a test bench for newly developed turboprop engines. It also provides a reference for the installation of similar engines on test benches.

[0045] 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 method of testing a turboprop engine mount, characterized in that, Includes the following steps: Install and connect the torque tester (92) to the dynamometer (91) which is pre-fixed as a positioning reference; The drive shaft (93) is coaxially connected to the torque meter (92); After the engine (94) is installed and connected to the mounting bracket (95), the engine (94) is coaxially connected with the drive shaft (93), and the engine (94) is synchronously adjusted to be concentric with the dynamometer (91) during the installation process; wherein, the mounting bracket (95) includes a fixed main mounting bracket and a traversing main mounting bracket set on both sides of the front end of the engine (94), and two sets of auxiliary mounting brackets set on both sides of the middle and rear section of the engine (94), and the fixed main mounting bracket is fixedly set to form the mounting base point of the mounting bracket (95), the traversing main mounting bracket is traversed radially along the engine (94), and the two sets of auxiliary mounting brackets are traversed slightly axially, radially, and vertically along the engine (94); when installing the engine (94), first install one of its main mounting sections with the fixed main mounting bracket, then install the other main mounting section with the traversing main mounting bracket, and finally install the two auxiliary mounting sections with the two sets of auxiliary mounting brackets respectively; The intake and exhaust equipment (96), starter motor (97), engine accessories (98) and functional pipelines (99) are respectively installed and connected to the engine (94); Install and connect each control cable (100) and each test cable (101); The protective device (102) is installed outside the torque meter (92) and the drive shaft (93); The fixed main mounting section bracket and the cascading main mounting section bracket each include a main bracket 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. The cascading main mounting section bracket also includes a cascading main mounting section (2) connected to the top of the corresponding main bracket. The auxiliary mounting section bracket includes an auxiliary bracket vertically supported on the base assembly and an auxiliary mounting section (3) detachably fixed to the top of the auxiliary bracket. 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; The step "connecting the engine (94) to the mounting bracket (95)" specifically includes the following steps: adjusting the position of the engine (94) left and right, front and back, and up and down so that the two main mounting sections of the engine (94) correspond to the fixed main mounting section (1) and the cascading main mounting section (2) of the mounting bracket (95) respectively, and the two auxiliary mounting sections of the engine (94) correspond to the two auxiliary mounting sections (3) of the mounting bracket (95) respectively; first connecting one main mounting section of the engine (94) to the fixed main mounting section (1), then connecting the other main mounting section of the engine (94) to the cascading main mounting section (2), and finally connecting the two auxiliary mounting sections of the engine (94) to the two auxiliary mounting sections (3) respectively; adjusting the engine (94) and the dynamometer (91) to be concentric; tightening the fastening bolts of the fixed main mounting section (1), the cascading main mounting section (2) and the two auxiliary mounting sections (3), and securing and marking them to prevent the mounting bolts on the engine from loosening during the test, and at the same time facilitating visual inspection.

2. The turboprop engine pedestal test installation method of claim 1, wherein, The specific operation of step "installing and connecting the torque tester (92) with the dynamometer (91) which is pre-fixed as the positioning reference" is as follows: The torque tester (92) includes a rotor, a stator, and cables. During installation, the rotor is first fixedly connected to the input end of the dynamometer (91), and then the rotor is installed. When the rotor is installed and positioned, a feeler gauge is used to confirm the uniformity of the gap between the rotor and the stator. After the uniformity of the gap between the rotor and the stator meets the requirements, the stator is fixed. Finally, the cables are installed, and the installation of the torque tester (92) is completed after confirming that the torque tester (92) is working normally.

3. The turboprop engine pedestal test installation method of claim 1, wherein, The specific operation of step "coaxially connecting the drive shaft (93) and the torque meter (92)" is as follows: First, use a crane to lift the drive shaft (93) to the same height as the axis of the torque meter (92). Then, rotate the rotor of the torque meter (92) to adjust the rotor of the torque meter (92) to be concentric with the mounting hole of the drive shaft. Next, install the positioning pin and fastening bolt in sequence. Then, use a torque wrench to tighten the fastening bolt to the specified torque force and remove the positioning pin. During the installation process, install a support seat at the other end of the drive shaft (93) to avoid the other end of the drive shaft (93) being suspended for a long time so that the end connected to the torque meter (92) is continuously subjected to force.

4. The turboprop engine pedestal test installation method of claim 1, wherein, The step "after installing the engine (94) onto the mounting bracket (95), make the engine (94) coaxially connected with the drive shaft (93), and synchronously adjust the engine (94) to be concentric with the dynamometer (91) during the installation process" specifically includes the following steps: The specific steps for replacing the mounting section of the engine (94) are as follows: open the fixed mounting bracket (95) of the engine (94) transport vehicle; lift the engine (94) upwards with a crane; remove the two main mounting sections used for transport on the engine (94), and then connect the two main mounting sections used for testing to the engine (94); remove the two auxiliary mounting sections (3) used for transport on the engine (94), and then connect the two auxiliary mounting sections used for testing to the engine (94); transport the engine (94) to the engine (94) mounting bracket (95) with a crane, in preparation for the installation of the engine (94) and the mounting bracket (95); Connect the engine (94) to the mounting bracket (95).

5. The turboprop engine shaft stand test installation method according to claim 4, characterized in that, 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 (94) respectively. The fixed main mounting section (1) is fixedly set to form the mounting base point of the mounting bracket (95), and the moving main mounting section (2) is set to move slightly in the radial direction of the engine (94). The auxiliary mounting section (3) is used to connect with the auxiliary mounting section on the corresponding side of the middle and rear section of the engine (94), and the auxiliary mounting section (3) is set to move slightly forward and backward, radially inward and outward, and vertically upward and downward along the engine (94).

6. The turboprop engine shaft stand test installation method according to claim 5, characterized in that, The step "adjusting the engine (94) and dynamometer (91) to be concentric" specifically includes the following steps: The dynamometer (91) is a fixed device and is set as the reference point; the engine (94) is the centering object. Install and fix the centering device to the input shaft end of the dynamometer (91) and the output shaft end of the engine (94); Measure the distance between the end face of the engine (94) and the end face of the dynamometer (91), the distance between the end face of the dynamometer (91) and the end face of the main mounting section of the engine (94), and the distance between the end face of the main mounting section of the engine (94) and the end face of the auxiliary mounting section, so as to input the basic parameters of the centering instrument into the centering instrument; Rotate the output shaft of the engine (94) at the required angle and record the offset between the engine (94) and the axis of the dynamometer (91); If the offset between the engine (94) and the dynamometer (91) shafts is greater than the test requirement or the compensation of the drive shaft (93), the installation positions of the main mounting section and auxiliary mounting section of the engine (94) need to be adjusted so that the offset between the engine (94) and the dynamometer (91) shafts meets the requirements. After the offset between the engine (94) and the dynamometer (91) shafts meets the requirements, save the centering instrument record, and then operate the centering instrument again according to the above centering steps to check whether the offset between the engine (94) and the dynamometer (91) shafts still meets the requirements. If it does not meet the requirements, repeat the above steps to continue adjusting. If it meets the requirements, record the data and proceed to the next step. At the same time, the main mounting section (1), the cascading main mounting section (2), and the two sets of auxiliary mounting sections (3) are fastened and fixed. Follow the alignment steps again to operate the alignment instrument to recheck whether the offset between the engine (94) and the dynamometer (91) shaft still meets the requirements. If it does not meet the requirements, repeat the above steps to continue the adjustment. If it meets the requirements, record and save the data to complete the equipment alignment.

7. The turboprop engine shaft stand test installation method according to claim 1, characterized in that, The step "installing and connecting the intake and exhaust equipment (96), starter motor (97), engine accessories (98), and functional pipelines (99) to the engine (94) respectively" specifically includes the following steps: The intake and exhaust equipment (96), starter motor (97), engine accessories (98) and functional pipelines (99) are respectively connected to the engine (94) by clamps; Install the positioning pins and align the installation edges; then install the clamps. If there is any misalignment, you can tap the area with a rubber mallet until it is aligned, then tighten the clamps to complete the installation. The functional pipeline (99) mainly includes fuel pipe, lubricating oil pipe, hydraulic oil pipe, vent pipe and vent pipe. Before installation, check whether the sealing ring is normal. After it is normal, tighten the installation with bolts or clamps. After installation, turn on the switch to supply gas / oil and check for leaks. If there are leaks, troubleshooting, replacement of parts or reinstallation are required until there are no leaks, thus completing the installation of the functional pipeline (99).

8. The turboprop engine shaft stand test installation method according to claim 1, characterized in that, The control cables (100) mainly include the engine (94) control cable, the starter motor (97) control cable and the AC motor cable; The test cable (101) mainly includes test cables, probes and sensors for various parameters of the engine (94), and vibration test cables, probes and sensors; The step "Installing and connecting each control cable (100) and each test cable (101)" specifically includes the following steps: Before installing the control cables (100), check for error prevention markings, the number of connectors, and the direction of the connectors, and then install them one by one. After installation, power on and check if the communication is normal. If there is any abnormality, it is necessary to troubleshoot and reinstall. If it is normal, the control cable installation is complete. Before installing the test cable (101), classify and count the test cable (101) and probes, and then install and tighten them one by one. After installation, power on and check if communication is normal. If there is any abnormality, troubleshooting and reinstallation are required. If normal, complete the installation of test cable (101).

9. The turboprop engine shaft stand test installation method according to claim 1, characterized in that, The protective equipment (102) mainly includes a torque meter protective cover, a drive shaft protective cover and an air intake protective cover; The step "installing the protective device (102) to the outside of the torque meter (92) and the drive shaft (93)" specifically includes the following steps: the protective device (102) is installed and fixed to the protective position of the corresponding equipment with bolts and ensured to be tight; After completing the step "installing the protective device (102) onto the outside of the torque meter (92) and the drive shaft (93)," the process also includes the step of adding lubricating oil to the engine (94), which specifically includes the following steps: Add lubricating oil to the engine (94) oil tank through the filler port as required; During the refueling process, open the air vents of the engine (94) inlet and outlet oil pipes to remove air from the internal and external lubricating oil system pipes of the engine (94) to prevent air lock in the lubricating oil system of the engine (94) from causing the lubricating oil system to malfunction. After filling the lubricating oil to the specified level, install the lubricating oil filling port plug, close the air vents of the inlet and outlet oil pipes, and the lubricating oil filling is complete.

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