A turbocharger turbine rotor dynamic balance air floatation measuring device

Abstract

The application relates to the field of rotor dynamic balance air floatation measurement, and discloses a supercharger turbine rotor dynamic balance air floatation measurement device which comprises a swing frame bottom plate, an air floatation support assembly arranged above the swing frame bottom plate, a blowing assembly, a rotor speed measurement assembly and a vibration monitoring assembly, the air floatation support assembly is used for suspending the rotor, the blowing assembly blows air to the suspended rotor and makes the rotor rotate, the rotor speed measurement assembly is used for measuring the rotating speed of the rotor and has a flexible adjustment structure, and the vibration monitoring assembly is used for monitoring the vibration condition of the rotor during rotation. The application has the advantages of large adjustment range, wide measurement range and high measurement precision.

Description

Technical Field

[0001] This application relates to the field of rotor dynamic balance air flotation measurement, and in particular to a turbocharger turbine rotor dynamic balance air flotation measurement device. Background Technology

[0002] Turbochargers increase the amount of air entering an engine by compressing air, which not only improves engine power and emissions but also reduces fuel consumption. Currently, turbochargers are becoming increasingly common, and the turbine rotor is one of the core components of a turbocharger. Because it operates at very high speeds, manufacturers need to perform dynamic balancing tests on the turbine rotor.

[0003] Currently, the commonly used turbine rotor dynamic balancing test equipment mainly measures the speed of the turbine rotor through photoelectric sensors. However, in the existing technology, the detection angle of the speed photoelectric sensor is limited, making it difficult to flexibly adjust for turbine rotors of different shapes and sizes, which in turn affects the measurement accuracy. Summary of the Invention

[0004] To address the limited detection angle of speed photoelectric sensors, this application provides a turbocharger turbine rotor dynamic balancing air-bearing measurement device, which has the advantages of a large movement range and wide adjustment angle for speed photoelectric sensors.

[0005] The turbocharger turbine rotor dynamic balancing air-float measurement device provided in this application adopts the following technical solution:

[0006] A turbocharger turbine rotor dynamic balancing air-float measurement device includes: a swing frame base plate; an air-float support assembly mounted on the swing frame base plate for supporting the rotor and suspending it; an air-blowing assembly mounted on the swing frame base plate and covering the outside of the air-float support assembly for blowing air onto the rotor blades to rotate the rotor; a vibration monitoring assembly mounted on the swing frame base plate and connected to the air-float support assembly for measuring the rotor's vibration condition; and a rotor speed measuring assembly mounted on the swing frame base plate for measuring the rotor speed. The rotor speed measuring assembly includes a horizontal adjustment plate, a vertical adjustment plate, a horizontal swing angle adjustment rod, a photoelectric sensor fixing plate, and a speed photoelectric sensor. The horizontal adjustment plate is disposed on the swing frame base plate, the vertical adjustment plate is disposed on top of the horizontal adjustment plate and slides horizontally on the horizontal adjustment plate, the horizontal swing angle adjustment rod is disposed on one side of the vertical adjustment plate and slides vertically on one side of the vertical adjustment plate, the speed photoelectric sensor is fixed on the photoelectric sensor fixing plate, the photoelectric sensor fixing plate is mounted on the horizontal swing angle adjustment rod, and the photoelectric sensor fixing plate rotates about the horizontal swing angle adjustment rod as an axis.

[0007] By adopting the above technical solution, the position of the speed photoelectric sensor can be adjusted in both horizontal and vertical directions. For rotors of different sizes or measurement positions, the speed photoelectric sensor can be moved to a suitable measurement position. Furthermore, the speed photoelectric sensor can rotate around the lateral swing angle adjustment rod as an axis, thereby adjusting the angle between the speed photoelectric sensor and the rotor in the vertical direction. This allows the probe of the speed photoelectric sensor to point at the rotor blades at a more suitable angle, offering advantages such as a large adjustment range, a wide measurement range, and high measurement accuracy.

[0008] Optionally, the rotor speed measuring assembly further includes a lateral swing angle adjusting block. One end of the lateral swing angle adjusting block is fixedly mounted on one side of the photoelectric sensor fixing plate. The lateral swing angle adjusting block is sleeved on the lateral swing angle adjusting rod. The lateral swing angle adjusting block rotates about the lateral swing angle adjusting rod as an axis, and the lateral swing angle adjusting block slides horizontally on the lateral swing angle adjusting rod. The sliding direction of the lateral swing angle adjusting block is perpendicular to the sliding direction of the vertical adjusting plate.

[0009] By adopting the above technical solution, the sliding cooperation between the lateral swing angle adjustment block and the lateral swing angle adjustment rod in the horizontal direction increases the movement direction of the speed photoelectric sensor, further improving the flexibility of the speed photoelectric sensor position adjustment and the measurement accuracy.

[0010] Optionally, the photoelectric sensor fixing plate has an arc-shaped sliding groove, and the speed photoelectric sensor is provided with a rotating center screw and a sliding engagement screw at opposite diagonal positions. The rotating center screw fixes the speed photoelectric sensor to the photoelectric sensor fixing plate, and the sliding engagement screw passes through the arc-shaped sliding groove from the side of the photoelectric sensor fixing plate away from the speed photoelectric sensor and slides within the arc-shaped sliding groove.

[0011] By adopting the above technical solution, the speed photoelectric sensor can be rotated on the photoelectric sensor mounting plate, thereby adjusting the angle between the speed photoelectric sensor and the rotor in the horizontal direction. This allows for more precise adjustment of the pointing of the speed photoelectric sensor probe, further improving measurement accuracy.

[0012] Optionally, the air bearing support assembly includes an air bearing and an air bearing mounting base. One side of the air bearing mounting base is connected to the vibration monitoring assembly, and the other side is fastened to the air bearing. The air bearing has a vertically penetrating air bearing support hole, and air outlet holes are provided on the inner wall of the air bearing support hole and the top of the air bearing.

[0013] By employing the above technical solution, air is blown onto the rotor using an air-bearing support assembly, generating stable air pressure at the bottom of the rotor blades and the circumferential wall of the turbine shaft. This suspends the rotor on the air-bearing support assembly, avoiding interference with rotor rotation caused by clamping methods and improving measurement accuracy. Simultaneous air blowing on both the radial and axial sides of the rotor turbine shaft enhances the stability of rotor suspension, further optimizing the measurement process.

[0014] Optionally, the vibration monitoring component includes a pendulum moving plate, a support spring rod, and a harmonic suppression block. One end of the support spring rod is disposed on the pendulum base plate, and the pendulum moving plate is disposed at the end of the support spring rod away from the pendulum base plate. The pendulum moving plate is connected to the air-bearing support component, and the harmonic suppression block is disposed at both ends of the pendulum moving plate in the vertical direction.

[0015] By adopting the above technical solution, the pendulum moving plate is supported only by the support spring rod. Since the spring rod is not rigid in the lateral direction, the small vibrations generated when the rotor rotates can be accurately transmitted to the pendulum moving plate through the air-bearing support assembly, which improves the accuracy of vibration detection. In addition, harmonic suppression blocks are set at both ends of the pendulum moving plate, which increases the overall weight of the pendulum moving plate, so that the pendulum moving plate will not vibrate excessively or become disordered when it vibrates with the rotor.

[0016] Optionally, the vibration monitoring assembly further includes a horizontal spring rod, a diaphragm clamping cylinder, and a cylinder fixing seat. The horizontal spring rod is located between the swing frame moving plate and the swing frame fixed vertical plate, and its two ends are respectively fixed to one side of the swing frame moving plate and the swing frame fixed vertical plate. One end of the cylinder fixing seat is set on the top of the swing frame fixed vertical plate, and the diaphragm clamping cylinder is installed on the other end of the cylinder fixing seat. The movable end of the diaphragm clamping cylinder faces the harmonic elimination block on the top of the swing frame moving plate. The horizontal spring rod and the diaphragm clamping cylinder cooperate to clamp the swing frame moving plate and the swing frame fixed vertical plate.

[0017] By adopting the above technical solution, the swing plate can be kept in a tight state by the cooperation of the diaphragm clamping cylinder and the horizontal spring rod before the rotor speed stabilizes. The vibration amplitude of the rotor is large during acceleration, and the support spring rod is very sensitive to vibration. Excessive vibration amplitude may cause the support spring rod to be damaged. This structure can reduce the vibration amplitude of the support spring rod during rotor acceleration, effectively protect the support spring rod, and further improve the stability of the vibration monitoring component structure.

[0018] Optionally, the turbocharger turbine rotor dynamic balance air flotation measurement device further includes a rotor installation identification component. The rotor installation identification component includes a through-beam photoelectric sensor, a photoelectric sensor stand, and a photoelectric sensor clamping block. The photoelectric sensor stand is disposed on both sides of the air blowing assembly. The photoelectric sensor clamping block is located at the top of the photoelectric sensor stand. The through-beam photoelectric sensor is clamped to the top of the photoelectric sensor stand by the photoelectric sensor clamping block. The probe of the through-beam photoelectric sensor points towards the rotor.

[0019] By adopting the above technical solution, each component will only enter the working state sequentially after a rotor is detected on the air-float support assembly. This ensures that none of the components will enter the working state when there is no rotor on the air-float support assembly, thus avoiding unnecessary energy consumption.

[0020] Optionally, the turbocharger turbine rotor dynamic balancing air-float measuring device further includes a lifting assembly, which is located directly below the air-float support assembly. The lifting assembly includes a tie rod, a lower support plate, a lifting cylinder, and a rotor positioning rod. The tie rod is fixed to the bottom of the swing frame base plate, the lower support plate is fixed to the bottom end of the tie rod, the lifting cylinder is located on the upper part of the lower support plate, and the rotor positioning rod is a hollow cylindrical shape, located at the movable end of the lifting cylinder.

[0021] By adopting the above technical solution, the rotor can be pushed out of the cavity of the air blowing nozzle plate by the cooperation of the lifting cylinder and the rotor positioning rod, so that the rotor is located above the air blowing assembly, which makes it easier for a human hand or robot to grasp it and improves the automation level of the device.

[0022] Optionally, the lifting assembly further includes a positioning seat, a limiting cylinder, and an elastic positioning bolt. The positioning seat is located at the movable end of the lifting cylinder. The limiting cylinder is cylindrical and located on top of the positioning seat. The positioning seat has a positioning cavity inside, which is connected to the inner cavity of the limiting cylinder. The rotor positioning rod passes through the cavity of the limiting cylinder and extends into the positioning cavity. The elastic positioning bolt passes through the peripheral wall of the limiting cylinder and the peripheral wall of the positioning seat, and the end of the elastic positioning bolt abuts against the side wall of the rotor positioning rod.

[0023] By adopting the above technical solution, when the rotor positioning rod is lifted, due to possible errors in parts processing and assembly, there is a slight positional error between the rotor positioning rod and the rotor or air bearing. By providing a certain swing space for the rotor positioning rod, the rotor positioning rod can be inserted into the air bearing in a slightly inclined state, or inserted in coordination with the rotor in a slightly inclined state, thereby eliminating the influence caused by parts processing and assembly errors.

[0024] Optionally, the lifting assembly further includes a lifting adjustment block and an adjustment screw. The two ends of the lifting adjustment block are movably sleeved on the pull rod, and the lifting adjustment block is located above the lower support plate. The adjustment screw passes through the lower support plate and is threadedly engaged with the lower support plate. One end of the adjustment screw is rotatably installed at the bottom of the lifting adjustment block.

[0025] By adopting the above technical solution, the final lifting height of the rotor positioning rod can be adjusted using the lifting adjustment block and the adjusting screw. For rotors of different sizes, the height of the rotor after being lifted can be kept consistent, which makes it easier for the robot to grasp it.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. The speed photoelectric sensor has a large adjustment range and multiple dimensions, and can be flexibly adjusted in three dimensions. For rotors of different sizes, the speed photoelectric sensor can be moved to the appropriate measurement position. Moreover, the speed photoelectric sensor can also adjust the angle between itself and the rotor, so that the speed photoelectric sensor can be accurately pointed at the rotor impeller, which can effectively improve the measurement accuracy.

[0028] 2. An air-bearing support assembly is used to support the rotor, effectively reducing the frictional force experienced by the rotor during rotation. Furthermore, this assembly simultaneously blows air onto the rotor from both the radial and axial directions of the rotor turbine shaft, improving the rotor's stability during rotation and further enhancing measurement accuracy. The structure of the pendulum moving plate and support spring rod allows for sensitive detection of vibrations generated during rotor rotation, improving the vibration monitoring assembly's sensitivity to rotor rotational vibrations. In addition, the harmonic suppression block on the pendulum moving plate enhances its stability when transmitting vibrations.

[0029] 3. By utilizing the cooperation between the diaphragm clamping cylinder and the horizontal spring rod, the moving plate of the swing frame and the fixed vertical plate of the swing frame can be kept in a tight-fitting state, avoiding structural damage to the support spring rod caused by large-amplitude vibrations during rotor acceleration. The rotor installation identification component ensures that none of the components will enter the working state when there is no rotor on the air-bearing support assembly, avoiding unnecessary energy consumption. The lifting component can lift the rotor to a position convenient for the robotic arm to grasp, improving the automation level of the device and accelerating the testing process. Simultaneously, the lifting component can adjust the lifting height according to different rotors, thus ensuring a consistent rotor height when lifted, further optimizing the part handling process. Attached Figure Description

[0030] Figure 1 This is a front view of the overall structure of an embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the overall structure from the back of an embodiment of this application;

[0032] Figure 3 This is a structural schematic diagram of the air-bearing support component, shown separately in an embodiment of this application;

[0033] Figure 4 This is a schematic diagram showing the structure of the air blowing assembly separately in an embodiment of this application;

[0034] Figure 5 This is a schematic diagram of the rotor speed measuring component shown separately in an embodiment of this application;

[0035] Figure 6This is a structural schematic diagram of the vibration monitoring component shown separately in an embodiment of this application;

[0036] Figure 7 This is a front structural diagram of the connecting rod fixing block, shown separately in an embodiment of this application;

[0037] Figure 8 This is a side view of the connecting rod fixing block, shown separately in an embodiment of this application.

[0038] Figure 9 This is a structural schematic diagram of the lifting component shown separately in an embodiment of this application;

[0039] Figure 10 This is a cross-sectional schematic diagram showing the positioning seat and the limiting cylinder separately in an embodiment of this application.

[0040] Attached reference numerals: 1. Base plate of the swing frame; 2. Fixed vertical plate of the swing frame; 3. Supporting vertical plate; 4. Air flotation support assembly; 5. Air blowing assembly; 6. Rotor speed measuring assembly; 7. Vibration monitoring assembly; 8. Rotor installation identification assembly; 9. Lifting assembly; 41. Air flotation bearing; 42. Air flotation bearing fixing seat; 411. Air flotation support hole; 412. Air outlet; 421. Air pipe hole; 51. Air blowing support plate; 52. Air blowing nozzle plate; 53. Air blowing pipe; 5 4. Positioning pin; 521. Air inlet; 61. Horizontal adjustment plate; 62. Vertical adjustment plate; 63. Horizontal swing angle adjustment rod; 64. Horizontal swing angle adjustment block; 65. Photoelectric sensor fixing plate; 66. Speed ​​photoelectric sensor; 611. Horizontal sliding groove; 621. Vertical sliding groove; 622. Horizontal sliding block; 631. Vertical sliding block; 651. Arc-shaped sliding groove; 661. Sliding fit screw; 662. Rotation center screw; 71. 72. Swing frame moving plate; 73. Harmonic suppressor; 74. Support spring rod; 75. Sensor connecting rod; 76. Connecting rod fixing block; 77. Vibration sensor; 78. Horizontal spring rod; 79. Thin film clamping cylinder; 70. Cylinder fixing seat; 71. Support spring rod fixing seat; 72. Fixing seat; 73. Extension plate; 74. Fine-tuning block; 755. First adjustment hole; 76. Second adjustment hole; 87. Clearance hole; 88. Through-beam photoelectric sensor; 2. Photoelectric sensor clamping block; 83. Photoelectric sensor upright; 91. Pull rod; 92. Lower support plate; 93. Lifting cylinder; 94. Rotor positioning rod; 95. Lifting adjusting block; 96. Adjusting screw; 97. Positioning seat; 98. Limiting cylinder; 99. Elastic positioning bolt; 971. Positioning cavity; 991. Positioning bolt body; 992. Movable ball; 993. Elastic connecting piece; 994. Elastic mounting groove; 101. Turbine shaft; 102. Blade. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0042] This application discloses a turbocharger turbine rotor dynamic balance air-float measurement device.

[0043] A turbocharger turbine rotor dynamic balance air-float measurement device, with reference to Figure 1 and Figure 2 The system includes a swing frame base plate 1, a support vertical plate 3 mounted above the swing frame base plate 1, a swing frame fixing vertical plate 2, an air flotation support assembly 4, an air blowing assembly 5, a rotor speed measuring assembly 6, and a vibration monitoring assembly 7. The air flotation support assembly 4 supports the rotor and suspends it; the air blowing assembly 5 covers the outside of the air flotation support assembly 4 and blows air onto the rotor blades 102 to accelerate the rotor's rotation; the rotor speed measuring assembly 6 is mounted on the top of the support vertical plate 3, located above the rotor and pointing towards the rotor blades 102, and measures the rotor's rotational speed; the vibration monitoring assembly 7 is mounted on the swing frame fixing vertical plate 2, and the air flotation support assembly 4 is connected to the vibration monitoring assembly 7. The vibration generated when the rotor rotates is transmitted to the vibration monitoring assembly 7 via the air flotation support assembly 4, and the vibration monitoring assembly 7 monitors the vibration status of the rotor.

[0044] Specifically, refer to Figure 2 and Figure 3 The air bearing support assembly 4 includes an air bearing 41 and an air bearing mounting base 42. One side of the air bearing mounting base 42 is connected to the vibration monitoring assembly 7, and the other side is fastened to the air bearing 41. The air bearing 41 has an air bearing support hole 411 through it in the vertical direction. When air is not supplied, the turbine shaft 101 of the rotor passes through the air bearing support hole 411, and the bottom of the rotor blade 102 contacts the top of the air bearing 41.

[0045] Furthermore, the air bearing mounting base 42 has an internal air passage and an air pipe hole 421 on one side, which is connected to the internal air passage, and a flexible air pipe is installed at the air pipe hole 421. The air bearing 41 also has an internal air passage that is connected to the air passage in the air bearing mounting base 42. The top of the air bearing 41 and the inner wall of the air bearing support hole 411 are both provided with air outlet holes 412, and the air outlet holes 412 are connected to the air passages in the air bearing 41.

[0046] During ventilation, gas enters sequentially from the air pipe into the air passages of the air bearing mounting base 42 and the air bearing 41. Part of the gas flows out from the air outlet 412 at the top of the air bearing 41, blowing upwards vertically to generate stable air pressure at the bottom of the rotor blades 102, thus lifting the rotor and maintaining its suspension. Another part of the gas flows out from the air outlet 412 on the inner wall of the air bearing 411's air support hole, blowing radially along the rotor turbine shaft 101, thereby generating stable air pressure on the circumferential wall of the turbine shaft 101. At this time, the rotor has no contact with the air bearing 41, and the rotor is completely suspended on the air support assembly 4, reducing interference experienced by the rotor during rotation and thus improving the accuracy of the test.

[0047] Reference Figure 1 and Figure 4 The air blowing assembly 5 includes an air blowing nozzle plate 52, an air blowing support plate 51, and air blowing pipes 53. There are two air blowing support plates 51, each fixedly mounted on the top of the swing frame base plate 1. The air blowing nozzle plate 52 is fixed to the top of the two air blowing support plates 51, forming a U-shaped frame structure. In this embodiment, there are four air blowing pipes 53, arranged in pairs on opposite sides of the two air blowing support plates 51.

[0048] Furthermore, the air-blowing nozzle plate 52 has a through cavity in the vertical direction, and the inner wall of the cavity of the air-blowing nozzle plate 52 has an air-blowing hole 521 for blowing air onto the rotor. When the rotor is suspended on the air-bearing support assembly 4, the rotor is located in the cavity of the air-blowing nozzle plate 52, and the air-blowing hole 521 is directly facing the rotor blades 102 to blow air onto the rotor to make it rotate.

[0049] Furthermore, both the air-blowing support plate 51 and the air-blowing nozzle plate 52 have air passages that are connected to each other. The air passage on the air-blowing support plate 51 is connected to the air-blowing pipe 53, and the air passage on the air-blowing nozzle plate 52 is connected to the air-blowing hole 521. The air-blowing pipe 53 is connected to an external air source. The gas entering through the air-blowing pipe 53 passes sequentially through the air passages on the air-blowing support plate 51 and the air-blowing nozzle plate 52, and is discharged from the air-blowing hole 521 to drive the rotor to rotate.

[0050] Furthermore, a positioning pin 54 is fixedly provided at the bottom of the air blowing nozzle plate 52. In this embodiment, there are four positioning pins 54 distributed at the four corners. The positioning pins 54 abut against the side of the air blowing support plate 51 near the air float support assembly 4, thereby limiting the relative position of the air blowing nozzle plate 52 and the air blowing support plate 51. This ensures that when the air blowing nozzle plate 52 is installed on the air blowing support plate 51, the air blowing holes 521 are evenly and symmetrically distributed with the turbine center as the center, thereby improving the uniformity of the force on the rotor during the air blowing process.

[0051] In use, the air flotation support assembly 4 is first ventilated to suspend the rotor in the cavity of the air blowing nozzle plate 52. Then, the air blowing assembly 5 is ventilated, and the gas flows out from the air blowing hole 521 on the inner wall of the cavity of the air blowing nozzle plate 52 and blows towards the rotor located in the cavity of the air blowing nozzle plate 52. The airflow blows the rotor blades 102 and drives the rotor to rotate.

[0052] Reference Figure 1 and Figure 5 The rotor speed measuring assembly 6 includes a horizontal adjusting plate 61, a vertical adjusting plate 62, a speed measuring photoelectric sensor 66, a photoelectric sensor fixing plate 65, and a horizontal swing angle adjusting rod 63. The horizontal adjusting plate 61 is horizontally fixed to the top of the supporting vertical plate 3. The vertical adjusting plate 62 is installed on the top of the horizontal adjusting plate 61 and can slide horizontally on the horizontal adjusting plate 61. The horizontal swing angle adjusting rod 63 is installed on the side wall of the vertical adjusting plate 62 and can slide vertically on the vertical adjusting plate 62. The speed measuring photoelectric sensor 66 is installed on the photoelectric sensor fixing plate 65 and is used to detect the rotor speed. The photoelectric sensor fixing plate 65 is connected to the horizontal swing angle adjusting rod 63 and can rotate along its axis on the horizontal swing angle adjusting rod 63.

[0053] The above structure allows the speed photoelectric sensor 66 to be moved horizontally and vertically to adjust the distance between it and the rotor. At the same time, the rotational cooperation between the photoelectric sensor fixing plate 65 and the transverse swing angle connecting rod allows the angle between the speed photoelectric sensor 66 and the rotor to be adjusted to improve speed measurement accuracy.

[0054] Specifically, the horizontal adjusting plate 61 is cuboid in shape and has a horizontal sliding groove 611 along its length. The vertical adjusting plate 62 is L-shaped, and a horizontal sliding block 622 is provided at the bottom of the shorter end of the vertical adjusting plate 62. The horizontal sliding block 622 is slidably installed in the horizontal sliding groove 611. At the same time, a screw can be passed through the horizontal sliding block 622 and fastened in the horizontal sliding groove 611. After loosening the screw between the vertical adjusting plate 62 and the horizontal adjusting plate 61, the vertical adjusting plate 62 can move horizontally along the horizontal sliding groove 611 of the horizontal adjusting plate 61 to adjust the horizontal distance between the speed measuring photoelectric sensor 66 and the rotor being measured.

[0055] In addition, the vertical adjustment plate 62 also has a vertical sliding groove 621 along the vertical direction. The lateral swing angle adjustment rod 63 is located on one side of the vertical adjustment plate 62 with the vertical sliding groove 621. One end of the lateral swing angle adjustment rod 63 is fixed with a vertical sliding block 631, which is slidably installed in the vertical sliding groove 621. At the same time, a screw can be passed through the vertical sliding block 631 and fastened in the vertical sliding groove 621. After loosening the screw between the lateral swing angle adjustment rod 63 and the vertical adjustment plate 62, the lateral swing angle adjustment rod 63 can move up and down in the vertical direction along the vertical sliding groove 621 of the vertical adjustment plate 62 to adjust the vertical distance between the speed measuring photoelectric sensor 66 and the rotor being measured.

[0056] Furthermore, a lateral swing angle adjustment block 64 is provided on the side of the photoelectric sensor mounting plate 65 away from the speed photoelectric sensor 66. The lateral swing angle adjustment block 64 is fitted onto the lateral swing angle adjustment rod 63 and fastened with screws. That is, the photoelectric sensor mounting plate 65 is connected to the lateral swing angle adjustment rod 63 through the lateral swing angle adjustment block 64. After loosening the screws between the lateral swing angle adjustment block 64 and the lateral swing angle adjustment rod 63, the lateral swing angle adjustment block 64 can rotate on the lateral swing angle adjustment rod 63 to adjust the vertical angle of the photoelectric sensor mounting plate 65. At the same time, the lateral swing angle adjustment block 64 can also slide horizontally on the lateral swing angle adjustment rod 63. The sliding direction at this point is perpendicular to the sliding direction of the vertical adjustment plate 62, so as to realize multi-directional adjustment of the speed sensor and thus improve its measurement accuracy.

[0057] Furthermore, an arc-shaped sliding groove 651 is provided on the photoelectric sensor fixing plate 65. A rotating center screw 662 and a sliding engagement screw 661 are respectively provided at diagonal positions of the speed measuring photoelectric sensor 66. The rotating center screw 662 fastens the speed measuring photoelectric sensor 66 to the photoelectric sensor fixing plate 65. The arc-shaped sliding groove 651 is opened with the rotating center screw 662 as the center. The sliding engagement screw 661 passes through the arc-shaped sliding groove 651 from the side of the photoelectric sensor fixing plate 65 away from the speed measuring photoelectric sensor 66, and the sliding engagement screw 661 is screwed onto the speed measuring photoelectric sensor 66.

[0058] In use, after loosening the rotating center screw 662 and the sliding engagement screw 661, the sliding engagement screw 661 slides in the arc-shaped sliding groove 651 of the photoelectric sensor fixing plate 65, which can drive the speed measuring photoelectric sensor 66 to rotate around the rotating center screw 662 as the center on the connecting rod fixing block 75, thereby adjusting the angle between the speed measuring photoelectric sensor 66 and the rotor in the horizontal direction.

[0059] The aforementioned structure allows for flexible adjustment of the distance between the speed-measuring photoelectric sensor 66 and the rotor in both horizontal and vertical directions. It also allows adjustment of the angle between the sensor probe and the rotor in both horizontal and vertical directions, enabling adjustment of the relative position between them from multiple directions and angles. For rotors of different sizes and shapes, the speed-measuring photoelectric sensor 66 can be adjusted to the optimal measurement position and angle, resulting in more accurate speed measurement, simulating a speed more closely matching the actual operating speed of the rotor, and further improving the accuracy of dynamic balance measurements.

[0060] Reference Figure 2 and Figure 6 The vibration monitoring component 7 includes a pendulum moving plate 71, a harmonic suppressor 72, a support spring rod 73, and a support spring rod fixing seat 731. The pendulum moving plate 71 has a U-shaped structure. One side of the pendulum moving plate 71 is connected to the air bearing fixing seat 42. The harmonic suppressor 72 is set at both ends of the pendulum moving plate 71 in the vertical direction. The support spring rod fixing seat 731 is set at the top of the pendulum base plate 1 and is located directly below the pendulum moving plate 71. The upper end of the pendulum moving plate 71 is set as the support spring rod connecting end, and the lower end is set as the support spring rod through end. One end of the support spring rod 73 is fixed to the top of the support spring rod fixing seat 731. The end of the support spring rod 73 away from the support spring rod fixing seat 731 passes through the harmonic suppressor 72 and the support spring rod through end of the pendulum moving plate 71 in sequence, and is fixed to the support spring rod connecting end of the pendulum moving plate 71. At this time, the swing frame moving plate 71 and the harmonic suppressor block 72 are supported only by the support spring rod 73 in the vertical direction. Since there is no support in the horizontal direction, even the slight vibration of the rotor can be transmitted to the swing frame moving plate 71 through the air flotation support assembly 4. In addition, the harmonic suppressor block 72 increases the overall weight of the swing frame moving plate 71, so that the swing frame moving plate 71 will not vibrate excessively or become disordered when it vibrates with the rotor.

[0061] Furthermore, the vibration monitoring assembly 7 also includes a vibration sensor 76, a sensor connecting rod 74, and a connecting rod fixing block 75. The vibration sensor 76 is fixed on the side of the supporting vertical plate 3 away from the swing frame moving plate 71, and the connecting rod fixing block 75 is fixed on the side of the swing frame moving plate 71 near the swing frame fixed vertical plate 2. The supporting vertical plate 3 has an opening at the connection point of the vibration sensor 76. One end of the sensor connecting rod 74 is fixed to the connecting rod fixing block 75, and the other end passes through the opening in the supporting vertical plate 3 and connects to the vibration sensor 76. Preferably, two sets of vibration sensors 76, sensor connecting rods 74, and connecting rod fixing blocks 75 are provided.

[0062] Furthermore, referring to Figure 7 and Figure 8The connecting rod fixing block 75 includes a fixing seat 751, an extension plate 752, and a fine-tuning block 753. The fixing seat 751 is fixed to the upper end of the swing frame moving plate 71 on the side away from the air buoyancy support assembly 4. The extension plate 752 is set perpendicular to the fixing seat 751. The fine-tuning block 753 is fixed to the side of the extension plate 752 near the vibration sensor 76 by bolts. One end of the sensor connecting rod 74 passes through the fine-tuning block 753. In this embodiment, the fixing seat 751 and the extension plate 752 are integrally formed, and the whole has a T-shaped structure.

[0063] In addition, the fixed base 751 has first adjustment holes 754 vertically opened at both ends, and the fixed base 751 is installed on the swing plate 71 by bolts passing through the first adjustment holes 754. Loosening the bolts can move the fixed base 751 vertically, thereby adjusting the installation position of the sensor connecting rod 74. At the same time, the fine adjustment block 753 has second adjustment holes 755 horizontally opened at both ends, and the fine adjustment block 753 is installed on the extension plate 752 by bolts passing through the second adjustment holes 755. The extension plate 752 has a clearance hole 756 horizontally opened. One end of the sensor connecting rod 74 passes through the fine adjustment block 753 and extends into the clearance hole 756 of the extension plate 752. Loosening the fixing bolts on the fine adjustment block 753 can move the fine adjustment block 753 horizontally, driving the sensor connecting rod 74 to move within the clearance hole 756 of the extension plate 752, thereby adjusting the installation position of the sensor connecting rod 74 horizontally.

[0064] By adjusting the position of the fixed base 751 in the vertical direction and the position of the fine-tuning block 753 in the horizontal direction, the position of the sensor connecting rod 74 can be adjusted to ensure that the sensor connecting rod 74 is in the correct position. At the same time, the adverse effects of part processing and assembly errors on the sensor are eliminated, and the measurement accuracy is further improved.

[0065] During use, the vibration generated after the rotor rotates stably is transmitted to the swing frame moving plate 71 via the air flotation support assembly 4. The sensor connecting rod 74 fixed on the swing frame moving plate 71 transmits the vibration to the vibration sensor 76, thereby obtaining the vibration data when the rotor rotates, which is used to analyze its dynamic balance performance.

[0066] Furthermore, referring to Figure 1 and Figure 6The vibration monitoring component 7 also includes horizontal spring rods 77, a diaphragm clamping cylinder 78, and a cylinder mounting base 79. The horizontal spring rods 77 are located between the swing frame moving plate 71 and the swing frame fixed vertical plate 2, and both ends are fixed to one side of the swing frame moving plate 71 and the swing frame fixed vertical plate 2, respectively. In this embodiment, there are four horizontal spring rods 77. The cylinder mounting base 79 is generally L-shaped. One end of the cylinder mounting base 79 is fixed to the top of the swing frame fixed vertical plate 2, and the diaphragm clamping cylinder 78 is installed at the other end of the cylinder mounting base 79. The telescopic rod of the diaphragm clamping cylinder 78 is set towards the harmonic suppression block 72 at the top of the swing frame moving plate 71.

[0067] During use, before the rotor speed stabilizes, the rotor vibration amplitude is relatively large, which will cause the swing frame moving plate 71 to generate a large vibration amplitude. Since the support spring rod 73 is very sensitive to vibration, excessive vibration amplitude may cause the support spring rod 73 to be damaged. Therefore, before the rotor rotates stably, the diaphragm clamping cylinder 78 is driven first, so that its extension rod abuts against the harmonic suppression block 72. The diaphragm clamping cylinder 78 cooperates with the horizontal spring rod 77 to keep the swing frame moving plate 71 in a tight state, thereby reducing vibration. After the rotor rotates stably, the extension rod of the diaphragm clamping cylinder 78 is retracted, and the swing frame moving plate 71 is released, allowing the swing frame moving plate 71 to vibrate together with the stably rotating rotor.

[0068] The turbocharger turbine rotor dynamic balance air flotation measurement device disclosed in this application also includes a rotor installation identification component 8, as shown in the following embodiment. Figure 1 The rotor installation identification component 8 includes a through-beam photoelectric sensor 81, a photoelectric sensor clamping block 82, and a photoelectric sensor upright 83. The photoelectric sensor upright 83 is located on both sides of the air blowing component 5 and is fixed on the swing frame base plate 1. The photoelectric sensor clamping block 82 is fixed on the top of the photoelectric sensor upright 83. The through-beam photoelectric sensor 81 is clamped and fixed by the photoelectric sensor clamping block 82, and the probe of the through-beam photoelectric sensor 81 points towards the rotor.

[0069] During operation, the through-beam photoelectric sensor 81 detects whether there is a rotor on the air flotation support assembly 4. If there is no rotor, the air flotation support assembly 4, the air blowing assembly 5, the rotor speed measuring assembly 6, and the vibration monitoring assembly 7 are all in a non-operating state; if there is a rotor, the above-mentioned components enter the operating state in sequence. By installing the rotor installation identification assembly 8, it is ensured that when there is no rotor on the air flotation support assembly 4, none of the components will enter the operating state, thus avoiding unnecessary energy consumption.

[0070] The turbocharger turbine rotor dynamic balancing air flotation measuring device disclosed in this application also includes a lifting assembly 9, as shown in the following embodiment. Figure 1 and Figure 9The lifting assembly 9 is located directly below the air blowing assembly 5. The lifting assembly 9 includes a lifting cylinder 93, a rotor positioning rod 94, a lower support plate 92, and a pull rod 91. Specifically, there are four pull rods 91. One end of the pull rod 91 is fixed to the bottom of the swing frame base plate 1. The lower support plate 92 is located at the bottom end of the pull rod 91. The lower support plate 92 and the pull rod 91 are fixed with nuts. The lower support plate 92 is used to provide support for the entire lifting assembly 9. The lifting cylinder 93 is connected to the pull rod 91. The rotor positioning rod 94 is located at the movable end of the lifting cylinder 93. The rotor positioning rod 94 is a hollow cylindrical shape. The turbine shaft 101 of the rotor can be inserted into the rotor positioning rod 94.

[0071] The lifting cylinder 93 can drive the rotor positioning rod 94 to move up and down. When the lifting cylinder 93 drives the rotor positioning rod 94 to move upward, the rotor positioning rod 94 can push the rotor out of the cavity in the air blowing nozzle plate 52 so that it can be taken out by hand or robot. When the lifting cylinder 93 drives the rotor positioning rod 94 to move downward, the rotor positioning rod 94 can place the rotor on the air flotation support assembly 4.

[0072] Furthermore, referring to Figure 10 The lifting assembly 9 also includes a positioning seat 97 and a limiting cylinder 98. The positioning seat 97 is fixed to the movable end of the lifting cylinder 93. The limiting cylinder 98 is a hollow cylinder and is fixed to the top of the positioning seat 97. A cylindrical positioning cavity 971 is opened inside the positioning seat 97. The positioning cavity 971 is connected to the cavity inside the limiting cylinder 98 and the two are coaxially arranged. The rotor positioning rod 94 passes through the cavity of the limiting cylinder 98 and extends into the positioning cavity 971. In addition, the inner diameter of the limiting cylinder 98 and the inner diameter of the positioning cavity 971 are both larger than the diameter of the rotor positioning rod 94, thereby providing a certain swing space for the rotor positioning rod 94 inside the limiting cylinder 98 and the positioning cavity 971.

[0073] Due to certain errors in parts processing and assembly, there may be a slight positional error between the rotor positioning rod 94 and the rotor or air bearing 41 when the rotor positioning rod 94 is lifted up. This provides a certain swing space for the rotor positioning rod 94, which can facilitate the rotor positioning rod 94 to be inserted into the air bearing 41 in a slightly inclined state, or to be inserted in conjunction with the rotor in a slightly inclined state.

[0074] Correspondingly, the top of the rotor positioning rod 94 is conical. When there is a slight positional error between the rotor positioning rod 94 and the air bearing 41, the conical structure can guide the rotor positioning rod 94 to be inserted into the air bearing 41 at a slight tilt. At the same time, the opening at the top of the rotor positioning rod 94 is an inner conical hole. When there is a slight positional error between the rotor turbine shaft 101 and the rotor positioning rod 94, the inner conical hole structure facilitates the guidance of the rotor turbine shaft 101 into the rotor positioning rod 94, while also allowing the rotor positioning rod 94 to tilt slightly.

[0075] Furthermore, multiple elastic positioning bolts 99 are provided on the periphery of the limiting cylinder 98 and the periphery of the positioning seat 97. The ends of the elastic positioning bolts 99 extend into the cavity of the limiting cylinder 98 and the positioning cavity 971 of the positioning seat 97, respectively, and are used to act on the rotor positioning rod 94 to cooperate with the swing of the rotor positioning rod 94. At the same time, they are also used to reset the rotor positioning rod 94.

[0076] Specifically, the elastic positioning bolt 99 includes a positioning bolt body 991, a movable ball 992, and an elastic connector 993. One end of the positioning bolt body 991 is provided with an elastic mounting groove 994. Preferably, the elastic mounting groove 994 is opened along the length direction inside the elastic positioning bolt 99 and has a cylindrical structure. The movable ball 992 is located on the opening side of the elastic mounting groove 994. One end of the elastic connector 993 abuts against the bottom of the elastic mounting groove 994, and the other end abuts against the movable ball 992.

[0077] In practical use, the movable ball 992 in the elastic positioning bolt 99 abuts against the side wall of the rotor positioning rod 94. When the rotor positioning rod 94 tilts, the movable ball 992 is compressed by the rotor positioning rod 94. When the rotor positioning rod 94 disengages from the air bearing 41 or the rotor in an inclined posture, the external force on the rotor positioning rod 94 disappears. The rotor positioning rod 94 gradually returns to its original position under the elastic force of the elastic positioning bolt 99. The elastic force of each elastic positioning bolt 99 gradually becomes equal during the reset process of the rotor positioning rod 94, eventually making the rotor positioning rod 94 in a stable vertical state, so as to facilitate the next lifting.

[0078] Furthermore, the elastic positioning bolts 99 installed on the periphery of the limiting cylinder 98 are designated as the first positioning bolt group, and the elastic positioning bolts 99 installed on the positioning seat 97 are designated as the second positioning bolt group. In this embodiment, the number of elastic positioning bolts 99 in both the first and second positioning bolt groups is four.

[0079] The positioning bolt 991 of the first positioning bolt group is closer to the rotor positioning rod 94 than the positioning bolt 991 of the second positioning bolt group. That is, the elastic positioning bolt 99 of the first positioning bolt group abuts more tightly, the compression of the elastic connector 993 is greater, and the elastic force applied to the rotor positioning rod 94 is greater. This makes the range of motion of the rotor positioning rod 94 within the limiting cylinder 98 very small. In contrast, the second positioning bolt group abuts more loosely than the first positioning bolt group, and the elastic force applied to the rotor positioning rod 94 is relatively smaller. Therefore, the range of motion of the rotor positioning rod 94 within the positioning cavity 971 is greater, which allows the rotor positioning rod 94 to swing slightly with the part within the limiting cylinder 98 as the fulcrum.

[0080] In addition, the lifting assembly 9 also includes a lifting adjustment block 95 and an adjusting screw 96. The two ends of the lifting adjustment block 95 are movably sleeved on two tie rods 91 and can slide up and down on the tie rods 91. The adjusting screw 96 passes through the lower support plate 92 and is threadedly engaged with the lower support plate 92. One end of the adjusting screw 96 is rotatably mounted on the bottom of the lifting adjustment block 95. By rotating the adjusting screw 96, the vertical distance between the lifting adjustment block 95 and the rotor can be adjusted, ensuring a consistent lifting height for rotors of different sizes, facilitating gripping by the robotic arm.

[0081] The implementation principle of the turbocharger turbine rotor dynamic balancing air-float measurement device disclosed in this application is as follows:

[0082] Before the test begins, the rotor positioning rod 94 of the lifting assembly 9 is in the raised state. After the robot arm places the rotor onto the rotor positioning rod 94, the rotor positioning rod 94 moves vertically downward under the drive of the lifting cylinder 93. Then, the rotor is placed onto the air flotation support assembly 4. The rotor speed measuring assembly 6 is adjusted so that the probe of the speed measuring photoelectric sensor 66 is aligned with the rotor blade 102. After the rotor installation identification assembly 8 detects that the rotor has been placed, the air flotation support assembly 4 begins to ventilate. The gas flows out from the top air outlet 412 of the air bearing 41 and the air outlet 412 on the inner wall of the air flotation support hole 411, and flows along... Axially and radially, air is blown onto the rotor, causing it to suspend. At this time, the diaphragm clamping cylinder 78 presses against the harmonic suppressor 72, fixing the swing frame moving plate 71 and the air-bearing support assembly 4 in a fixed state. Then, the air blowing assembly 5 starts to circulate air, and the gas flows out from the air blowing hole 521 of the air blowing nozzle plate 52 and blows onto the rotor blades 102, causing the rotor to rotate faster. The rotor speed measuring assembly 6 measures the rotational speed of the rotor. When the rotor reaches above the natural frequency of the vibration measuring system, the diaphragm clamping cylinder 78 releases the harmonic suppressor 72. At this time, the swing frame moving plate 71 vibrates along with the rotor and transmits the vibration to the vibration measuring sensor 76 through the sensor connecting rod 74.

[0083] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dynamic balancing air-float measurement device for a turbocharger turbine rotor, characterized in that: include: Base plate of the display stand (1); The air-float support assembly (4) is installed on the swing frame base plate (1) to support the rotor and suspend it; The air blowing assembly (5) is installed on the base plate (1) of the swing frame and covered on the outside of the air flotation support assembly (4) for blowing air onto the rotor blades (102) to make the rotor rotate; The vibration monitoring component (7) is installed on the base plate (1) of the swing frame and connected to the air-bearing support component (4) to measure the vibration status of the rotor; The rotor speed measuring component (6) is installed on the swing frame base plate (1) and is used to measure the rotor speed. The rotor speed measuring assembly (6) includes a horizontal adjustment plate (61), a vertical adjustment plate (62), a horizontal swing angle adjustment rod (63), a photoelectric sensor fixing plate (65), and a speed measuring photoelectric sensor (66). The horizontal adjustment plate (61) is set on the swing frame base plate (1). The vertical adjustment plate (62) is set on the top of the horizontal adjustment plate (61) and slides horizontally on the horizontal adjustment plate (61). The horizontal swing angle adjustment rod (63) is set on one side of the vertical adjustment plate (62) and slides vertically on one side of the vertical adjustment plate (62). The speed measuring photoelectric sensor (66) is fixed on the photoelectric sensor fixing plate (65). The photoelectric sensor fixing plate (65) is installed on the horizontal swing angle adjustment rod (63), and the photoelectric sensor fixing plate (65) rotates about the horizontal swing angle adjustment rod (63) as an axis. The rotor speed measuring assembly (6) also includes a lateral swing angle adjusting block (64). One end of the lateral swing angle adjusting block (64) is fixedly disposed on one side of the photoelectric sensor fixing plate (65). The lateral swing angle adjusting block (64) is sleeved on the lateral swing angle adjusting rod (63). The lateral swing angle adjusting block (64) rotates about the lateral swing angle adjusting rod (63) as an axis. The lateral swing angle adjusting block (64) slides horizontally on the lateral swing angle adjusting rod (63). The sliding direction of the lateral swing angle adjusting block (64) is perpendicular to the sliding direction of the vertical adjusting plate (62). The vibration monitoring component (7) includes a swing frame moving plate (71), a support spring rod (73), and a harmonic elimination block (72). One end of the support spring rod (73) is set on the swing frame base plate (1), and the swing frame moving plate (71) is set at the end of the support spring rod (73) away from the swing frame base plate (1). The swing frame moving plate (71) is connected to the air-bearing support component (4), and the harmonic elimination block (72) is set at both ends of the swing frame moving plate (71) in the vertical direction. The vibration monitoring component (7) also includes a horizontal spring rod (77), a diaphragm clamping cylinder (78), and a cylinder fixing seat (79). The horizontal spring rod (77) is located between the swing frame moving plate (71) and the swing frame fixing vertical plate (2), and its two ends are respectively fixed to one side of the swing frame moving plate (71) and the swing frame fixing vertical plate (2). One end of the cylinder fixing seat (79) is set on the top of the swing frame fixing vertical plate (2), and the diaphragm clamping cylinder (78) is installed on the other end of the cylinder fixing seat (79). The movable end of the diaphragm clamping cylinder (78) faces the harmonic elimination block (72) on the top of the swing frame moving plate (71). The horizontal spring rod (77) and the diaphragm clamping cylinder (78) cooperate to press the swing frame moving plate (71) together.

2. The turbocharger turbine rotor dynamic balancing air-float measurement device according to claim 1, characterized in that: The photoelectric sensor fixing plate (65) has an arc-shaped sliding groove (651). The speed photoelectric sensor (66) is provided with a rotating center screw (662) and a sliding engagement screw (661) at opposite diagonal positions. The rotating center screw (662) fastens the speed photoelectric sensor (66) to the photoelectric sensor fixing plate (65). The sliding engagement screw (661) passes through the arc-shaped sliding groove (651) from the side of the photoelectric sensor fixing plate (65) away from the speed photoelectric sensor (66) and slides in the arc-shaped sliding groove (651).

3. The turbocharger turbine rotor dynamic balancing air-float measurement device according to claim 1, characterized in that: The air bearing support assembly (4) includes an air bearing (41) and an air bearing mounting base (42). One side of the air bearing mounting base (42) is connected to the vibration monitoring assembly (7), and the other side is fastened to the air bearing (41). The air bearing (41) has an air bearing support hole (411) through which the turbine shaft (101) of the rotor passes in the vertical direction. The inner wall of the air bearing support hole (411) and the top of the air bearing (411) are both provided with air outlet holes (412).

4. The turbocharger turbine rotor dynamic balancing air-float measurement device according to claim 1, characterized in that: It also includes a rotor installation identification component (8), which includes a through-beam photoelectric sensor (81), a photoelectric sensor stand (83), and a photoelectric sensor clamping block (82). The photoelectric sensor stand (83) is located on both sides of the air blowing component (5). The through-beam photoelectric sensor (81) is clamped on the top of the photoelectric sensor stand (83) by the photoelectric sensor clamping block (82). The probe of the through-beam photoelectric sensor (81) points towards the rotor.

5. The turbocharger turbine rotor dynamic balancing air-float measurement device according to claim 1, characterized in that: It also includes a lifting assembly (9), which is located directly below the air-bearing support assembly (4). The lifting assembly (9) includes a pull rod (91), a lower support plate (92), a lifting cylinder (93), and a rotor positioning rod (94). The pull rod (91) is fixed to the bottom of the swing frame base plate (1), the lower support plate (92) is fixed to the bottom end of the pull rod (91), the lifting cylinder (93) is connected to the pull rod (91), and the rotor positioning rod (94) is a hollow cylindrical shape. The rotor positioning rod (94) is located at the movable end of the lifting cylinder (93).

6. The turbocharger turbine rotor dynamic balancing air-float measurement device according to claim 5, characterized in that: The lifting assembly (9) also includes a positioning seat (97), a limiting cylinder (98), and an elastic positioning bolt (99). The positioning seat (97) is located at the movable end of the lifting cylinder (93). The limiting cylinder (98) is cylindrical and located at the top of the positioning seat (97). The positioning seat (97) has a positioning cavity (971) inside. The positioning cavity (971) is connected to the inner cavity of the limiting cylinder (98). The rotor positioning rod (94) passes through the cavity of the limiting cylinder (98) and extends into the positioning cavity (971). The elastic positioning bolt (99) passes through the peripheral wall of the limiting cylinder (98) and the peripheral wall of the positioning seat (97). The end of the elastic positioning bolt (99) abuts against the side wall of the rotor positioning rod (94).

7. The turbocharger turbine rotor dynamic balancing air-float measurement device according to claim 6, characterized in that: The lifting assembly (9) further includes a lifting adjustment block (95) and an adjustment screw (96). The lifting adjustment block (95) is movably sleeved on the pull rod (91) at both ends. The adjustment screw (96) passes through the lower support plate (92) and is threadedly engaged with the lower support plate (92). One end of the adjustment screw (96) is rotatably installed at the bottom of the lifting adjustment block (95).

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