Test platform convenient for centering installation of engine

Abstract

The invention relates to the field of engine detection, and particularly discloses a test platform convenient for centering installation of an engine, the test platform comprises an operation table, a dynamometer, a gradienter, a verticality measuring instrument and a quincunx elastic coupling, the operation table is provided with a static platform and a movable platform, the movable platform can lift and move towards the static platform, and the quincunx elastic coupling is arranged on the movable platform. The clamp used for fixing the engine is installed on the movable platform, the gradienter and the perpendicularity measuring instrument are used for detecting the levelness and perpendicularity of the engine respectively, and the quincunx elastic coupler is used for achieving coaxial connection of an engine rotating shaft and a dynamometer rotating shaft. In addition, precise centering adjustment between the movable platform and the operation table is achieved through a horizontal displacement assembly and a vertical displacement assembly, a plurality of pressure measuring assemblies are arranged in the quincunx elastic coupler, and the centering precision is ensured. According to the invention, the engine installation efficiency and the centering precision are improved, so that the accuracy of a test result is improved.

Description

Technical Field

[0001] The present application relates to the field of engine testing, and in particular to a testing platform that facilitates the centering installation of an engine. Background Art

[0002] At present, engine testing is an important part of evaluating engine performance, especially in the process of R&D and production, it is crucial to ensure that the various parameters of the engine meet the design requirements. Before the engine dynamometer is tested, the engine and the dynamometer need to be aligned. This process is complicated but necessary to ensure the rigor of the test process. "Alignment" generally refers to the accurate alignment of two axes to ensure that they are on the same axis. In the connection between the engine and the dynamometer, the accuracy of the centering is particularly critical to ensure that there is no deviation when transmitting torque and rotational motion, thereby ensuring the accuracy and reliability of the test.

[0003] In the related art, in order to achieve accurate centering installation of the engine and the dynamometer, the centering often requires fixing the engine on a test stand and then adjusting the position of the dynamometer for centering.

[0004] The above-mentioned related technologies have the following defects: after the engine is fixed on the test bench, it is necessary not only to adjust the position of the engine on the test bench, but also to adjust the position of the dynamometer for centering, which makes it difficult to accurately align the engine and the dynamometer. Summary of the invention

[0005] In order to facilitate accurate alignment between the engine and the dynamometer when testing the engine, the present application provides a test platform that facilitates the centering installation of the engine.

[0006] The present application provides a test platform that facilitates engine centering installation and adopts the following technical solutions: A test platform for facilitating the centring installation of an engine comprises an operating table, a dynamometer, a level, a verticality measuring instrument and a plum blossom-shaped elastic coupling, wherein a static platform and a movable platform are arranged on the operating table, and the movable platform can be raised and lowered and is arranged on the side of the static platform and can move toward the static platform; the dynamometer is mounted on the static platform; a clamp for fixing the engine is mounted on the movable platform; the level is mounted on the operating table and is used to detect the horizontality of the engine; the verticality measuring instrument is detachably mounted on the operating table and is used to detect the verticality of the engine; the plum blossom-shaped elastic coupling is used to coaxially connect the rotating shaft of the engine and the rotating shaft of the dynamometer.

[0007] By adopting the above technical solution, the position of the dynamometer in the horizontal and vertical directions is debugged when the dynamometer is installed on the static platform. The engine to be tested is clamped and fixed on the movable platform by a clamp, the horizontality of the engine is detected by a level meter, the verticality of the engine is detected by a verticality measuring instrument, and the position of the engine in the horizontal and vertical directions is debugged according to the detection data. Then, the position of the movable platform is debugged, and after the engine is moved to be aligned with the dynamometer, a plum blossom-shaped elastic coupling is used to coaxially connect the rotating shaft of the engine and the rotating shaft of the dynamometer, so that when the engine is tested, it is easy to accurately align the engine and the dynamometer.

[0008] Preferably, a horizontal displacement component is connected between the movable platform and the operating table, and a vertical displacement component is connected between the horizontal displacement component and the operating table; the horizontal displacement component is used to drive the movable platform to move toward the dynamometer on a horizontal plane; and the vertical displacement component is used to drive the horizontal displacement component to perform vertical lifting.

[0009] By adopting the above technical solution, the horizontal displacement assembly enables the movable platform to move toward the dynamometer on the horizontal plane, ensuring that the horizontal position between the engine and the dynamometer is accurately aligned. The vertical displacement assembly can drive the horizontal displacement assembly to rise and fall vertically, so that the engine on the movable platform can be finely adjusted in the height direction.

[0010] Preferably, the plum blossom-shaped elastic coupling includes a first half coupling, a second half coupling and a plum blossom-shaped elastic element, the first half coupling includes a first connecting tube and a plurality of first claws installed on the first end of the first connecting tube, and the second end of the first connecting tube is used to be coaxially connected to the rotating shaft of the engine; the second half coupling includes a second connecting tube and a plurality of second claws installed on the second end of the second connecting tube, and the second end of the second connecting tube is used to be coaxially connected to the rotating shaft of the dynamometer; the plum blossom-shaped elastic element is provided with a plurality of first limiting grooves corresponding to the plurality of first claws and a plurality of second limiting grooves corresponding to the plurality of second claws, the first claws are arranged in the corresponding first limiting grooves, and the second claws are arranged in the corresponding second limiting grooves.

[0011] By adopting the above technical solution, the first half coupling and the second half coupling are coaxially connected to the engine shaft and the dynamometer shaft respectively, ensuring the smoothness and reliability of the transmission. The first cam and the second cam are respectively embedded in the first limit groove and the second limit groove on the plum blossom-shaped elastic element, which not only realizes accurate centering installation, but also can effectively absorb and compensate for the slight displacement caused by installation errors, thereby improving the stability and life of the system. The elastic characteristics of the plum blossom-shaped elastic element make the coupling have good vibration reduction and buffering effects, further reducing the impact of mechanical vibration on the system and improving the overall performance.

[0012] Preferably, the plum blossom-shaped elastic element, the first connecting tube and the second connecting tube are coaxial, and the first protruding claw, the second protruding claw, the first limiting groove and the second limiting groove are all arranged along the axial direction of the plum blossom-shaped elastic element.

[0013] By adopting the above technical solution, the precise alignment of the components of the plum blossom-shaped elastic coupling is ensured, and the coaxiality and stability of the plum blossom-shaped elastic coupling are improved.

[0014] Preferably, a plurality of the first limiting grooves and a plurality of the second limiting grooves are alternately distributed in sequence along the circumference of the plum blossom-shaped elastic element; a first pressure measuring assembly is provided in each of the first limiting grooves, one end of the first pressure measuring assembly is connected to the plum blossom-shaped elastic element, and the other end is used to contact with the first cam; a second pressure measuring assembly is provided in each of the second limiting grooves, one end of the second pressure measuring assembly is connected to the plum blossom-shaped elastic element, and the other end is used to contact with the second cam.

[0015] By adopting the above technical solution, a plurality of first limiting grooves and a plurality of second limiting grooves are alternately distributed along the circumference of the plum blossom-shaped elastic element, so that a plurality of first pressure measuring assemblies and a plurality of second pressure measuring assemblies can be alternately distributed along the circumference of the plum blossom-shaped elastic element, and then a plurality of first pressure measuring assemblies and a plurality of second pressure measuring assemblies can cooperate to detect the pressure borne by the plum blossom-shaped elastic element in one circle. After the plum blossom-shaped elastic coupling coaxially connects the rotating shaft of the engine and the rotating shaft of the dynamometer together, if the detection data of the plurality of first pressure measuring assemblies and the plurality of second pressure measuring assemblies are the same, it means that the rotating shaft of the engine and the rotating shaft of the dynamometer are coaxial, if there is a difference between the detection data of the plurality of first pressure measuring assemblies and the plurality of second pressure measuring assemblies, it means that the rotating shaft of the engine and the rotating shaft of the dynamometer are not coaxial, and the displacement direction of the engine can be determined according to the pressure detection data.

[0016] Preferably, the first pressure measuring assembly includes a first pressure sensor installed in the first limiting groove, and the force-bearing end of the first pressure sensor is in elastic contact with the first cam; the second pressure measuring assembly includes a second pressure sensor installed in the second limiting groove, and the force-bearing end of the second pressure sensor is in elastic contact with the second cam.

[0017] By adopting the above technical solution, after the plum blossom-shaped elastic coupling is assembled, the first cam can effectively contact the first pressure sensor, and the second cam can effectively contact the second pressure sensor, thereby being able to effectively monitor in real time the pressure applied by the first cam and the second cam on the plum blossom-shaped elastic element.

[0018] Preferably, the first pressure measuring assembly also includes a first spring rod, one end of which is connected to the first pressure sensor, and the other end is in contact with the first pawl; the second pressure measuring assembly also includes a second spring rod, one end of which is connected to the second pressure sensor, and the other end is in contact with the second pawl.

[0019] By adopting the above technical solution, the first spring rod enables the force-bearing end of the first pressure sensor to elastically contact with the first pawl. The second spring rod enables the force-bearing end of the second pressure sensor to elastically contact with the second pawl.

[0020] Preferably, the bottom of the first limiting groove is provided with a first accommodating hole arranged along the radial direction of the plum blossom-shaped elastic element, and the first spring rod is coaxially arranged in the first accommodating hole; the bottom of the second limiting groove is provided with a second accommodating hole arranged along the radial direction of the plum blossom-shaped elastic element, and the second spring rod is coaxially arranged in the second accommodating hole.

[0021] By adopting the above technical solution, the first receiving hole can guide the extension and contraction of the first spring rod, so that the first spring rod can more accurately transmit the pressure to the first pressure sensor. The second receiving hole can guide the extension and contraction of the second spring rod, so that the second spring rod can more accurately transmit the pressure to the second pressure sensor.

[0022] Preferably, a first guide plate parallel to the plum blossom-shaped elastic element is provided at one end of the first spring rod away from the first pressure sensor, and two sides of the first guide plate are chamfered with the end of the first guide plate away from the first pressure sensor; a second guide plate parallel to the plum blossom-shaped elastic element is provided at one end of the second spring rod away from the second pressure sensor, and two sides of the second guide plate are chamfered with the end of the second guide plate away from the second pressure sensor.

[0023] By adopting the above technical solution, when the first pawl is inserted into the first limiting groove, the first pawl can move along the chamfered slope of the first guide plate, so that the first pawl can automatically press the first guide plate toward the first pressure sensor. When the second pawl is inserted into the second limiting groove, the second pawl can move along the chamfered slope of the second guide plate, so that the second pawl can automatically press the second guide plate toward the second pressure sensor. This facilitates the assembly of the first half coupling, the second half coupling and the plum blossom-shaped elastic element.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. The movable platform in this application can be raised and lowered and moved toward the static platform. Together with the level and verticality measuring instrument, it can accurately adjust the horizontality and verticality of the engine to ensure the centering installation accuracy of the engine and the dynamometer, thereby improving the accuracy and reliability of the test results; 2. The plum blossom-shaped elastic coupling in the present application realizes the coaxial connection between the engine shaft and the dynamometer shaft through the claws and limit groove structures on the first half coupling and the second half coupling, effectively absorbs and compensates for the vibration and impact caused by the installation deviation, and further improves the stability of the centering installation; 3. In the present application, the first pressure measuring assembly and the second pressure measuring assembly can detect the circumferential pressure applied by the first protruding claw and the second protruding claw on the plum blossom-shaped elastic element. After the plum blossom-shaped elastic coupling coaxially connects the rotating shaft of the engine and the rotating shaft of the dynamometer, it is possible to determine whether the first half coupling and the second half coupling are coaxial by comparing the pressure data at various locations on the circumference of the plum blossom-shaped elastic element, thereby facilitating the debugging of the engine position. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 It is a structural diagram of the activity platform; Figure 3 It is a structural schematic diagram of a plum blossom-shaped elastic coupling; Figure 4 It is a schematic diagram of the exploded structure of the plum blossom-shaped elastic coupling.

[0027] Reference numerals: 1. Operating table; 11. Static platform; 12. Movable platform; 120. Fixture; 13. Horizontal displacement assembly; 131, first ball screw slide; 1311, first speed change gear box; 1312, first servo motor; 132, second ball screw slide; 1321, second speed change gear box; 1322, second servo motor; 14. Vertical displacement assembly; 141, a third ball screw slide; 1411, a third speed change gear box; 1412, a third servo motor; 142, fourth ball screw slide; 1421, fourth speed change gear box; 1422, fourth servo motor; 2. Dynamometer; 20. Engine; 3. Level; 4. Verticality measuring instrument; 5. Plum blossom shaped elastic coupling; 51, first half coupling; 510, first connecting pipe; 511, first claw; 52, second half coupling; 520, second connecting pipe; 521, second claw; 53. Plum blossom shaped elastic element; 5301, first limiting groove; 53011, first receiving hole; 5302, second limiting groove; 53021, second receiving hole; 54, first pressure measuring assembly; 541, first pressure sensor; 542, first spring rod; 543, first guide plate; 55, second pressure measuring assembly; 551, second pressure sensor; 552, second spring rod; 553, second guide plate; 56. Plug; 6. Protective box. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-4 This application is described in further detail.

[0029] An embodiment of the present application discloses a test platform that facilitates the centering installation of an engine.

[0030] Reference Figure 1A test platform for facilitating the centering installation of an engine comprises an operating platform 1, a dynamometer 2, a level 3, a verticality measuring instrument 4 and a plum blossom-shaped elastic coupling 5. A static platform 11 and a movable platform 12 are provided on the operating platform 1. The movable platform 12 is arranged on the side of the static platform 11 and can be moved toward the static platform 11. A horizontal displacement component 13 is connected between the movable platform 12 and the operating platform 1, and a vertical displacement component 14 is connected between the horizontal displacement component 13 and the operating platform 1. The horizontal displacement component 13 is used to drive the movable platform 12 to move toward the dynamometer 2 on a horizontal plane. The vertical displacement component 14 is used to drive the horizontal displacement component 13 to be lifted and lowered vertically.

[0031] Reference Figure 1 , the dynamometer 2 is mounted on the stationary platform 11. A fixture 120 for fixing the engine 20 is mounted on the movable platform 12, and the fixture 120 is a prior art. A level meter 3 is mounted on the operating table 1, and is used to detect the horizontality of the engine 20. A verticality measuring instrument 4 is detachably mounted on the operating table 1, and is used to detect the verticality of the engine 20. A plum blossom-shaped elastic coupling 5 is used to coaxially connect the rotating shaft of the engine 20 and the rotating shaft of the dynamometer 2 together.

[0032] Reference Figure 1 In the embodiment of the present application, the horizontal and vertical position of the dynamometer 2 is debugged when it is installed on the stationary platform 11. The engine 20 to be tested is clamped and fixed on the movable platform 12 by the clamp 120, the horizontality of the engine 20 is detected by the level meter 3, the verticality of the engine 20 is detected by the verticality measuring instrument 4, and the horizontal and vertical positions of the engine 20 are debugged according to the detection data. Then, the position of the movable platform 12 is debugged, and after the engine 20 is moved to be aligned with the dynamometer 2, the plum blossom-shaped elastic coupling 5 is used to coaxially connect the rotating shaft of the engine 20 and the rotating shaft of the dynamometer 2, so that when the engine 20 is tested, it is easy to accurately align the engine 20 and the dynamometer 2.

[0033] Reference Figure 2The horizontal displacement assembly 13 includes a first ball screw slide 131 and a second ball screw slide 132 arranged along the length direction of the rotating shaft of the dynamometer 2, and the first ball screw slide 131 and the second ball screw slide 132 are both installed on the vertical displacement assembly 14. The first slider of the first ball screw slide 131 and the second slider of the second ball screw slide 132 are both connected to the movable platform 12. A first servo motor 1312 is installed at one end of the first screw of the first ball screw slide 131, and a first speed change gear box 1311 is connected between the first servo motor 1312 and the first screw. A second servo motor 1322 is installed at one end of the second screw of the second ball screw slide 132, and a second speed change gear box 1321 is connected between the second servo motor 1322 and the second screw. In the embodiment of the present application, the first speed gear box 1311 and the second speed gear box 1321 cooperate with the first servo motor 1312 and the second servo motor 1322 respectively, which can make the position adjustment of the first ball screw slide 131 and the second ball screw slide 132 more precise, thereby making the horizontal position adjustment of the engine 20 more precise.

[0034] Reference Figure 2 The vertical displacement assembly 14 includes a third ball screw slide 141 and a fourth ball screw slide 142, and the third ball screw slide 141 and the fourth ball screw slide 142 are vertically arranged on the operating table 1. The first ball screw slide 131 is installed on the third slider of the third ball screw slide 141. The second ball screw slide 132 is installed on the fourth slider of the fourth ball screw slide 142. A third servo motor 1412 is installed at one end of the third lead screw of the third ball screw slide 141, and a third speed change gear box 1411 is connected between the third servo motor 1412 and the third lead screw. A fourth servo motor 1422 is installed at one end of the fourth lead screw of the fourth ball screw slide 142, and a fourth speed change gear box 1421 is connected between the fourth servo motor 1422 and the fourth lead screw. In the embodiment of the present application, the third speed gearbox 1411 and the fourth speed gearbox 1421 cooperate with the third servo motor 1412 and the fourth servo motor 1422 respectively, which can make the position adjustment of the third ball screw slide 141 and the fourth ball screw slide 142 more precise, thereby making the vertical position adjustment of the engine 20 more precise.

[0035] Reference Figure 3 and Figure 4The plum blossom-shaped elastic coupling 5 includes a first half coupling 51, a second half coupling 52 and a plum blossom-shaped elastic element 53. The first half coupling 51 includes a first connecting pipe 510 and a plurality of first protruding claws 511 installed at the first end of the first connecting pipe 510. The second end of the first connecting pipe 510 is used to be coaxially connected to the rotating shaft of the engine 20. The second half coupling 52 includes a second connecting pipe 520 and a plurality of second protruding claws 521 installed at the second end of the second connecting pipe 520. The second end of the second connecting pipe 520 is used to be coaxially connected to the rotating shaft of the dynamometer 2. The plum blossom-shaped elastic element 53 is provided with a plurality of first limiting grooves 5301 corresponding to the plurality of first protruding claws 511 and a plurality of second limiting grooves 5302 corresponding to the plurality of second protruding claws 521. The first protruding claws 511 are arranged in the corresponding first limiting grooves 5301, and the second protruding claws 521 are arranged in the corresponding second limiting grooves 5302.

[0036] Reference Figure 3 and Figure 4 In the embodiment of the present application, the first half coupling 51 and the second half coupling 52 are coaxially connected to the rotating shaft of the engine 20 and the rotating shaft of the dynamometer 2, respectively, to ensure the stability and reliability of the transmission. The first cam 511 and the second cam 521 are respectively embedded in the first limit groove 5301 and the second limit groove 5302 on the plum blossom-shaped elastic element 53, which not only realizes accurate centering installation, but also can effectively absorb and compensate for the slight displacement caused by the installation error, thereby improving the stability and life of the system. The elastic characteristics of the plum blossom-shaped elastic element 53 make the coupling have good vibration reduction and buffering effects, further reducing the impact of mechanical vibration on the system and improving the overall performance.

[0037] Reference Figure 3 and Figure 4 The plum blossom-shaped elastic element 53 , the first connecting tube 510 and the second connecting tube 520 are coaxial, and the first protruding claw 511 , the second protruding claw 521 , the first limiting groove 5301 and the second limiting groove 5302 are all arranged along the axial direction of the plum blossom-shaped elastic element 53 .

[0038] Reference Figure 3 and Figure 4 In the implementation manner of the present application, the precise alignment of the components of the plum blossom-shaped elastic coupling 5 is ensured, and the coaxiality and stability of the plum blossom-shaped elastic coupling 5 are improved.

[0039] Reference Figure 3 and Figure 4, a plurality of first limiting grooves 5301 and a plurality of second limiting grooves 5302 are alternately distributed in sequence along the circumference of the plum blossom-shaped elastic element 53. A first pressure measuring assembly 54 is disposed in each first limiting groove 5301, one end of the first pressure measuring assembly 54 is connected to the plum blossom-shaped elastic element 53, and the other end is used to contact the first protruding claw 511. A second pressure measuring assembly 55 is disposed in each second limiting groove 5302, one end of the second pressure measuring assembly 55 is connected to the plum blossom-shaped elastic element 53, and the other end is used to contact the second protruding claw 521.

[0040] Reference Figure 3 and Figure 4 In the embodiment of the present application, the plurality of first limiting grooves 5301 and the plurality of second limiting grooves 5302 are alternately distributed along the circumference of the plum blossom-shaped elastic element 53, so that the plurality of first pressure measuring assemblies 54 and the plurality of second pressure measuring assemblies 55 can be alternately distributed along the circumference of the plum blossom-shaped elastic element 53, and then the plurality of first pressure measuring assemblies 54 and the plurality of second pressure measuring assemblies 55 can cooperate to detect the pressure borne by the plum blossom-shaped elastic element 53 in one circle. After the plum blossom-shaped elastic coupling 5 coaxially connects the rotating shaft of the engine 20 and the rotating shaft of the dynamometer 2 together, if the detection data of the plurality of first pressure measuring assemblies 54 and the plurality of second pressure measuring assemblies 55 are the same, it means that the rotating shaft of the engine 20 and the rotating shaft of the dynamometer 2 are coaxial, if there is a difference between the detection data of the plurality of first pressure measuring assemblies 54 and the plurality of second pressure measuring assemblies 55, it means that the rotating shaft of the engine 20 and the rotating shaft of the dynamometer 2 are not coaxial, and the offset direction of the engine 20 can be determined according to the pressure detection data.

[0041] Reference Figure 3 and Figure 4 The first pressure measuring assembly 54 includes a first pressure sensor 541 installed in the first limiting groove 5301, and the force-bearing end of the first pressure sensor 541 is in elastic contact with the first cam 511. The second pressure measuring assembly 55 includes a second pressure sensor 551 installed in the second limiting groove 5302, and the force-bearing end of the second pressure sensor 551 is in elastic contact with the second cam 521.

[0042] Reference Figure 3 and Figure 4 In the embodiment of the present application, after the plum blossom-shaped elastic coupling 5 is assembled, the first cam 511 can effectively contact the first pressure sensor 541, and the second cam 521 can effectively contact the second pressure sensor 551, thereby being able to effectively monitor in real time the pressure applied by the first cam 511 and the second cam 521 to the plum blossom-shaped elastic element 53.

[0043] Reference Figure 3 and Figure 4The first pressure measuring assembly 54 further includes a first spring rod 542, one end of which is connected to the first pressure sensor 541, and the other end of which contacts the first pawl 511. The second pressure measuring assembly 55 further includes a second spring rod 552, one end of which is connected to the second pressure sensor 551, and the other end of which contacts the second pawl 521.

[0044] Reference Figure 3 and Figure 4 In the embodiment of the present application, the first spring rod 542 enables the force-bearing end of the first pressure sensor 541 to elastically contact the first pawl 511 . The second spring rod 552 enables the force-bearing end of the second pressure sensor 551 to elastically contact the second pawl 521 .

[0045] Reference Figure 3 and Figure 4 The bottom of the first limiting groove 5301 is provided with a first receiving hole 53011 arranged along the radial direction of the plum blossom-shaped elastic element 53, and the first spring rod 542 is coaxially arranged in the first receiving hole 53011. The bottom of the second limiting groove 5302 is provided with a second receiving hole 53021 arranged along the radial direction of the plum blossom-shaped elastic element 53, and the second spring rod 552 is coaxially arranged in the second receiving hole 53021.

[0046] Reference Figure 3 and Figure 4 In the embodiment of the present application, the first receiving hole 53011 can guide the extension and contraction of the first spring rod 542, so that the first spring rod 542 can more accurately transmit the pressure to the first pressure sensor 541. The second receiving hole 53021 can guide the extension and contraction of the second spring rod 552, so that the second spring rod 552 can more accurately transmit the pressure to the second pressure sensor 551.

[0047] Reference Figure 3 and Figure 4 A first guide plate 543 parallel to the plum blossom-shaped elastic element 53 is provided at one end of the first spring rod 542 away from the first pressure sensor 541, and both sides of the first guide plate 543 are chamfered with the end of the first guide plate 543 away from the first pressure sensor 541. A second guide plate 553 parallel to the plum blossom-shaped elastic element 53 is provided at one end of the second spring rod 552 away from the second pressure sensor 551, and both sides of the second guide plate 553 are chamfered with the end of the second guide plate 553 away from the second pressure sensor 551.

[0048] Reference Figure 3 and Figure 4In the embodiment of the present application, when the first pawl 511 is inserted into the first limiting groove 5301, the first pawl 511 can move along the chamfered surface of the first guide plate 543, so that the first pawl 511 can automatically press the first guide plate 543 toward the first pressure sensor 541. When the second pawl 521 is inserted into the second limiting groove 5302, the second pawl 521 can move along the chamfered surface of the second guide plate 553, so that the second pawl 521 can automatically press the second guide plate 553 toward the second pressure sensor 551. This facilitates the assembly between the first half coupling 51, the second half coupling 52 and the plum blossom-shaped elastic element 53.

[0049] Reference Figure 3 and Figure 4 , since the shaft of the engine 20 is likely to heat up when the engine 20 is running at a high speed, if a power source such as a battery is set on the plum blossom-shaped elastic element 53 to power the first pressure sensor 541 and the second pressure sensor 551, the battery or other power source is likely to explode due to overheating and other safety hazards. Therefore, in order to reduce the safety hazard, a plug 56 is set on the plum blossom-shaped elastic element 53, and the first pressure sensor 541 and the second pressure sensor 551 are both connected to the plug 56. When the first pressure sensor 541 and the second pressure sensor 551 are running, the external power supply and the touch display screen are both plugged into the plug 56, wherein the external power supply and the touch display screen are both existing technologies, and the touch display screen can display the measurement data of the first pressure sensor 541 and the second pressure sensor 551 and control the operation of the first pressure sensor 541 and the second pressure sensor 551.

[0050] The implementation principle of a test platform for facilitating engine centering installation in the embodiment of the present application is as follows: When the dynamometer 2 is installed on the stationary platform 11, the position adjustment in the horizontal and vertical directions is completed. The engine 20 to be tested is clamped and fixed on the movable platform 12 by the clamp 120, the horizontality of the engine 20 is detected by the level meter 3, the verticality of the engine 20 is detected by the verticality measuring instrument 4, and the position of the engine 20 in the horizontal and vertical directions is adjusted according to the detection data.

[0051] After running the horizontal displacement assembly 13 and the vertical displacement assembly 14, adjusting the position of the movable platform 12, and moving the engine 20 so that it is basically aligned with the dynamometer 2, the plum blossom-shaped elastic coupling 5 is used to coaxially connect the rotating shaft of the engine 20 and the rotating shaft of the dynamometer 2 together. At this time, there may be a slight deviation between the engine 20 and the dynamometer 2.

[0052] Therefore, after the plum blossom-shaped elastic coupling 5 coaxially connects the rotating shaft of the engine 20 and the rotating shaft of the dynamometer 2, if the detection data of the multiple first pressure measuring assemblies 54 and the multiple second pressure measuring assemblies 55 are the same, it means that the rotating shaft of the engine 20 and the rotating shaft of the dynamometer 2 are coaxial. If there is a difference in the detection data of the multiple first pressure measuring assemblies 54 and the multiple second pressure measuring assemblies 55, it means that the rotating shaft of the engine 20 and the rotating shaft of the dynamometer 2 are not coaxial. At this time, the detection data of the multiple first pressure measuring assemblies 54 and the multiple second pressure measuring assemblies 55 are compared, and the engine 20 is moved toward the side with larger pressure data until the detection data of the multiple first pressure measuring assemblies 54 and the multiple second pressure measuring assemblies 55 are the same. In addition, when testing the engine 20, it is easy to accurately align the engine 20 and the dynamometer 2.

[0053] In addition, due to the errors between parts during actual production, when the rotating shaft of the engine 20 and the rotating shaft of the dynamometer 2 are coaxial, the detection data of multiple first pressure measuring assemblies 54 and multiple second pressure measuring assemblies 55 may be exactly the same and may be in a theoretical state. Therefore, in the actual operation process, it is necessary to set an error range for the detection data of the first pressure measuring assembly 54 and the second pressure measuring assembly 5 by continuously debugging the plum blossom-shaped elastic coupling 5. When comparing the detection data of the multiple first pressure measuring assemblies 54 and the multiple second pressure measuring assemblies 55, as long as the difference is within the error range, it can still be determined that the rotating shaft of the engine 20 and the rotating shaft of the dynamometer 2 are coaxial.

[0054] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate that there is at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0055] The above are all optional embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A test platform for facilitating engine centering installation, characterized in that: The invention comprises an operating table (1), a dynamometer (2), a level (3), a verticality measuring instrument (4) and a plum blossom-shaped elastic coupling (5); the operating table (1) is provided with a stationary platform (11) and a movable platform (12); the movable platform (12) is arranged on the side of the stationary platform (11) in a manner that allows it to be raised or lowered, and is capable of moving toward the stationary platform (11); The dynamometer (2) is mounted on the stationary platform (11); A fixture (120) for fixing the engine (20) is installed on the movable platform (12); The level meter (3) is installed on the operating table (1) and is used to detect the levelness of the engine (20); The verticality measuring instrument (4) is detachably mounted on the operating platform (1) and is used to detect the verticality of the engine (20); The plum blossom-shaped elastic coupling (5) is used to coaxially connect the rotating shaft of the engine (20) and the rotating shaft of the dynamometer (2).

2. A test platform for facilitating engine centering installation according to claim 1, characterized in that: A horizontal displacement component (13) is connected between the movable platform (12) and the operating table (1), and a vertical displacement component (14) is connected between the horizontal displacement component (13) and the operating table (1); The horizontal displacement component (13) is used to drive the movable platform (12) to move on a horizontal plane toward the dynamometer (2); The vertical displacement component (14) is used to drive the horizontal displacement component (13) to perform vertical lifting.

3. A test platform for facilitating engine centering installation according to claim 1, characterized in that: The plum blossom-shaped elastic coupling (5) comprises a first half coupling (51), a second half coupling (52) and a plum blossom-shaped elastic element (53); the first half coupling (51) comprises a first connecting tube (510) and a plurality of first protruding claws (511) mounted on a first end of the first connecting tube (510); the second end of the first connecting tube (510) is used for being coaxially connected to a rotating shaft of the engine (20); The second half coupling (52) comprises a second connecting tube (520) and a plurality of second lugs (521) mounted on a second end of the second connecting tube (520), the second end of the second connecting tube (520) being used for being coaxially connected to a rotating shaft of the dynamometer (2); The plum blossom-shaped elastic element (53) is provided with a plurality of first limiting grooves (5301) arranged corresponding to the plurality of first protruding claws (511) and a plurality of second limiting grooves (5302) arranged corresponding to the plurality of second protruding claws (521). The first protruding claw (511) is arranged in the corresponding first limiting groove (5301), and the second protruding claw (521) is arranged in the corresponding second limiting groove (5302).

4. A test platform for facilitating engine centering installation according to claim 3, characterized in that: The plum blossom-shaped elastic element (53), the first connecting tube (510) and the second connecting tube (520) are coaxial, and the first protruding claw (511), the second protruding claw (521), the first limiting groove (5301) and the second limiting groove (5302) are all arranged along the axial direction of the plum blossom-shaped elastic element (53).

5. A test platform for facilitating engine centering installation according to claim 3, characterized in that: The plurality of first limiting grooves (5301) and the plurality of second limiting grooves (5302) are alternately distributed in sequence along the circumference of the plum blossom-shaped elastic element (53); A first pressure measuring assembly (54) is provided in each of the first limiting grooves (5301); one end of the first pressure measuring assembly (54) is connected to the plum blossom-shaped elastic element (53), and the other end is used to contact the first protruding claw (511); A second pressure measuring assembly (55) is provided in each of the second limiting grooves (5302); one end of the second pressure measuring assembly (55) is connected to the plum blossom-shaped elastic element (53), and the other end is used to contact the second cam (521).

6. A test platform for facilitating engine centering installation according to claim 5, characterized in that: The first pressure measuring assembly (54) comprises a first pressure sensor (541) installed in the first limiting groove (5301), and the force-bearing end of the first pressure sensor (541) is in elastic contact with the first cam (511); The second pressure measuring assembly (55) comprises a second pressure sensor (551) installed in the second limiting groove (5302), and the force-bearing end of the second pressure sensor (551) is in elastic contact with the second pawl (521).

7. A test platform for facilitating engine centering installation according to claim 6, characterized in that: The first pressure measuring assembly (54) further comprises a first spring rod (542), one end of the first spring rod (542) being connected to the first pressure sensor (541), and the other end of the first spring rod (542) being in contact with the first pawl (511); The second pressure measuring assembly (55) further comprises a second spring rod (552), one end of the second spring rod (552) being connected to the second pressure sensor (551), and the other end of the second spring rod (552) being in contact with the second pawl (521).

8. A test platform for facilitating engine centering installation according to claim 7, characterized in that: A first accommodating hole (53011) is provided at the bottom of the first limiting groove (5301) and is arranged along the radial direction of the plum blossom-shaped elastic element (53); the first spring rod (542) is coaxially arranged in the first accommodating hole (53011); A second accommodating hole (53021) is provided at the bottom of the second limiting groove (5302) and is arranged along the radial direction of the plum blossom-shaped elastic element (53), and the second spring rod (552) is coaxially arranged in the second accommodating hole (53021).

9. A test platform for facilitating engine centering installation according to claim 8, characterized in that: A first guide plate (543) parallel to the plum blossom-shaped elastic element (53) is provided at one end of the first spring rod (542) away from the first pressure sensor (541), and two sides of the first guide plate (543) and one end of the first guide plate (543) away from the first pressure sensor (541) are chamfered; A second guide plate (553) parallel to the plum blossom-shaped elastic element (53) is provided at one end of the second spring rod (552) away from the second pressure sensor (551), and two sides of the second guide plate (553) and one end of the second guide plate (553) away from the second pressure sensor (551) are chamfered.

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