High-speed dynamic balancing device

Abstract

The present invention discloses a high-speed dynamic balancing device, comprising: a first positioning mechanism, a second positioning mechanism, a center positioning mechanism and a connecting mechanism, wherein the first end of the first positioning mechanism is connected to a driving mechanism, and the output end of the driving mechanism is provided with a spline shaft, and the second end of the first positioning mechanism is used to be connected to a rotor support; the second positioning mechanism is axially spaced apart from the first positioning mechanism and the spacing is adjustable, and the second positioning mechanism is used to be connected to a turbine casing; the center positioning mechanism comprises a front swing frame and a rear swing frame, the front swing frame is used to adjust the height of the center axis of the first positioning mechanism, and the rear swing frame is used to adjust the height of the center axis of the second positioning mechanism so that the first positioning mechanism is coaxial with the second positioning mechanism; the connecting mechanism is used to connect the first positioning mechanism and the second positioning mechanism so that the second positioning mechanism is rigidly fixed to the first positioning mechanism; the driving mechanism is used to drive the rotor shaft to rotate on the first positioning mechanism and the second positioning mechanism to perform a high-speed dynamic balancing test.

Description

Technical Field

[0001] The present invention relates to the technical field of high-speed dynamic balancing, and in particular to a high-speed dynamic balancing device. Background Art

[0002] Various errors in rotor design, manufacturing, and assembly can lead to rotor imbalance. The rotor's dynamic deflection increases at high speeds, with severe bending deformation of the shaft occurring particularly at critical speeds. When the dynamic deflection exceeds 800μm, the power turbine shaft can rub against the center tie rod of the gas generator rotor. Furthermore, excessive deflection indicates significant dynamic loads on the rotor, increasing the operating stresses on the rotor itself and its bearings. This not only increases engine vibration but also severely impacts the engine's service life and flight safety.

[0003] High-speed dynamic balancing of rotors is an important means of ensuring the safe and reliable operation of rotating machinery. The high-speed dynamic balancing process for thin-walled, slender, flexible rotors in aircraft engines is an application of high-speed mechanical vibration measurement and correction. Therefore, analyzing and studying the rationality of high-speed balancing tooling solutions is crucial for ensuring engine performance and quality.

[0004] Existing high-speed dynamic balancing devices used to detect whether the high-speed balance of rotors is qualified can usually only detect rotors of specific corresponding models. They have poor versatility and are difficult to assemble rotor components of different models. It may be necessary to design specific connection devices to cooperate with the high-speed dynamic balancing device to install the rotor, resulting in excessively high testing costs. Summary of the Invention

[0005] The present invention provides a high-speed dynamic balancing device to solve the technical problem of how to improve the versatility of the high-speed dynamic balancing device to adapt to the assembly test of rotor assemblies of different models, thereby avoiding the design of specific connection devices and reducing the detection cost.

[0006] According to the present invention, a high-speed dynamic balancing device is provided for performing a high-speed dynamic balancing test on a rotor assembly, wherein the rotor assembly includes a rotor shaft, a rotor support and a turbine casing respectively rotatably connected to both ends of the rotor shaft, wherein the rotor shaft, the rotor support and the turbine casing are coaxially arranged and include:

[0007] a first positioning mechanism, wherein a first end of the first positioning mechanism is detachably connected to a driving mechanism coaxially arranged with the first positioning mechanism, and a second end of the first positioning mechanism is used for being positioned and connected to the rotor support;

[0008] a second positioning mechanism, the second positioning mechanism and the first positioning mechanism are axially spaced apart and the spacing is adjustable, the second positioning mechanism being used for positioning and connecting with the turbine casing;

[0009] a center positioning mechanism, the center positioning mechanism comprising a front swing frame and a rear swing frame, the front swing frame being used to support the first positioning mechanism and adjust the positioning height of the first positioning mechanism, and the rear swing frame being used to support the second positioning mechanism and adjust the positioning height of the second positioning mechanism so that the first positioning mechanism and the second positioning mechanism are coaxial;

[0010] a connecting mechanism, the connecting mechanism being used to connect the first positioning mechanism and the second positioning mechanism so that the second positioning mechanism is rigidly fixed relative to the first positioning mechanism;

[0011] The driving mechanism is used to drive the rotor shaft to rotate on the first positioning mechanism and the second positioning mechanism to perform a high-speed dynamic balancing test.

[0012] Furthermore, the first positioning mechanism includes a front positioning bushing, a front positioning ring and a transition positioning ring, the front positioning bushing is used to support the rotor support and make the rotor support coaxial with the front positioning bushing, the front positioning ring is detachably connected to the front positioning bushing and the rotor support, the first end of the transition positioning ring is detachably connected to the driving mechanism, the second end of the transition positioning ring is detachably connected to the front positioning ring, and the front positioning bushing, the front positioning ring, the transition positioning ring and the driving mechanism are coaxially arranged.

[0013] Furthermore, the second positioning mechanism includes a rear positioning bushing and a rear positioning ring, the rear positioning bushing is used to support the turbine casing and make the turbine casing coaxial with the rear positioning bushing, and the rear positioning ring is coaxially arranged with the turbine casing and is detachably connected.

[0014] Furthermore, the front swing frame includes a front half-ring support member, a front clamping half-ring and a front fastener, the front half-ring support member is used to support the front positioning bushing, the front clamping half-ring is detachably connected to the front half-ring support member through the front fastener, and the front clamping half-ring and the front half-ring support member are used to clamp the front positioning bushing to each other and radially position the front positioning bushing.

[0015] Furthermore, the rear swing frame includes a rear half-ring support member, a rear clamping half-ring and a rear fastener, the rear half-ring support member is used to support the rear positioning bushing, the rear clamping half-ring is detachably connected to the rear half-ring support member through the rear fastener, and the rear clamping half-ring and the rear half-ring support member are used to clamp the rear positioning bushing to each other and radially position the rear positioning bushing.

[0016] Furthermore, the connecting mechanism includes a connecting block, a support rod, a fixing nut and an adjusting nut. The first end of the connecting block is detachably connected to the front positioning bushing, and the second end of the connecting block is extended radially outward along the front positioning bushing. The two ends of the support rod are respectively provided with a first threaded portion and a second threaded portion. The first threaded portion is threadedly connected to the rear positioning bushing, and the second threaded portion passes through the second end of the connecting block and is connected to a fixing nut. The adjusting nut is connected to the second threaded portion and is located on the side of the connecting block away from the fixing nut. The adjusting nut is used to adjust the spacing distance between the connecting block and the rear positioning bushing.

[0017] Furthermore, the connection mechanisms are provided in multiple groups, and the multiple groups of connection mechanisms are distributed at intervals in the circumferential direction along the front positioning bushing.

[0018] Furthermore, the driving mechanism includes an outer shell, a support bearing, a connecting shaft, a spline shaft and an elastic member. The outer shell is detachably connected to the first end of the adapter positioning ring and is coaxially arranged with the adapter positioning ring. A bearing groove is provided in the outer shell, and the support bearing is embedded in the bearing groove. The connecting shaft passes through the inner ring of the support bearing so that the connecting shaft is coaxial with the outer shell. The first end of the connecting shaft is used to be connected to the output shaft of the high-speed dynamic balancing machine, and the second end of the connecting shaft is sequentially provided with a spline groove and an accommodating groove in the direction toward the first end of the connecting shaft. The first end of the spline shaft is connected to the spline groove and is coaxial with the connecting shaft. The elastic member is provided in the accommodating groove and abuts against the first end of the spline shaft, and the second end of the spline shaft is used to be connected to the rotor shaft.

[0019] Furthermore, the outer shell is provided with a quick pipe joint for supplying oil to the support bearing, and the quick pipe joint is detachably connected to a pipe plug for sealing the quick pipe joint.

[0020] Furthermore, the connecting mechanism is provided with a lifting lug for connecting to a lifting device.

[0021] The present invention has the following beneficial effects:

[0022] In the high-speed dynamic balancing device of the present invention, the first positioning mechanism and the second positioning mechanism are separated so that the spacing distance between the two can be adjusted, thereby adapting to the measurement of rotor assemblies of different lengths. The front swing frame and the rear swing frame of the center positioning mechanism support the first positioning mechanism and the second positioning mechanism respectively, and the front swing frame is used to support the first positioning mechanism and adjust the height of the center axis of the first positioning mechanism, and the rear swing frame is used to support the second positioning mechanism and adjust the height of the center axis of the second positioning mechanism so that the first positioning mechanism is coaxial with the second positioning mechanism. Then, by setting a connecting structure, the second positioning mechanism is rigidly fixed relative to the first positioning mechanism, thereby protecting the rotor assembly and avoiding irreversible deformation of the rotor assembly due to force when the high-speed dynamic balancing device is hoisted. The driving mechanism is optimized so that a spline shaft is set at the output end of the driving shaft. The spline shaft can be replaced to adapt to the rotor shafts of different models, and the output end of the driving mechanism is used to connect with the rotor shaft and drive the rotor shaft to rotate for high-speed dynamic balancing tests.

[0023] During specific implementation, first check whether there are any abnormalities in the various components of the high-speed dynamic balancing device, and clean the various components and the rotor assembly that needs to be inspected. Then, assemble the first positioning mechanism and the driving mechanism, and select a spline shaft that is compatible with the rotor assembly and install it on the driving mechanism. Then, install the rotor assembly on the first positioning mechanism and the second positioning mechanism, and rigidly connect the first positioning mechanism and the second positioning mechanism through the connecting mechanism. Then, place the front swing frame and the rear swing frame on the guide rail on the high-speed balancing machine, and adjust the distance between the front swing frame and the rear swing frame according to the length of the rotor assembly. Then, install the first positioning mechanism on the front swing frame and the second positioning mechanism on the rear swing frame. Finally, connect the driving mechanism to the output end of the high-speed balancing machine, drive the driving mechanism through the output end, and then drive the rotating assembly to rotate for testing.

[0024] In summary, by providing a universal drive mechanism, a first positioning mechanism, a second positioning mechanism, and a central positioning mechanism, the design is simplified, significantly reducing design and manufacturing costs, facilitating assembly, and improving efficiency. A connecting mechanism is also provided to rigidly secure the second positioning mechanism relative to the first positioning mechanism, preventing uncontrolled deformation of the component's long axis due to stress during hoisting and other processes. This device is adaptable to testing of various rotor assemblies and is easy to install, use, and operate. It improves the efficiency of high-speed balancing, significantly reduces aircraft assembly costs, and provides strong support and reliability for aircraft production and assembly.

[0025] In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 1 is a schematic structural diagram of a high-speed dynamic balancing device according to a preferred embodiment of the present invention;

[0028] Figure 2 is a schematic structural diagram of a driving mechanism according to a preferred embodiment of the present invention;

[0029] Figure 3 2 is a schematic structural diagram of a front swing frame according to a preferred embodiment of the present invention;

[0030] Figure 4 It is a structural schematic diagram of the rear swing frame of a preferred embodiment of the present invention.

[0031] Legend:

[0032] 100, front locating bushing; 101, front locating ring; 102, adapter locating ring;

[0033] 200, rear positioning bushing; 201, rear positioning ring;

[0034] 300, front swing frame; 301, front half-ring support member; 302, front pressing half-ring; 303, front fastener;

[0035] 400, rear swing frame; 401, rear half-ring support member; 402, rear pressing half-ring; 403, rear fastener;

[0036] 500, connecting block; 501, support rod; 502, first threaded portion; 503, second threaded portion; 504, fixing nut; 505, adjusting nut;

[0037] 600, outer shell; 601, support bearing; 602, connecting shaft; 603, spline groove; 604, receiving groove; 605, elastic member; 606, spline shaft; 607, quick pipe connector; 608, pipe plug;

[0038] 700. Lifting lug. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0040] like Figures 1 to 4As shown, a high-speed dynamic balancing device of this embodiment is used to perform a high-speed dynamic balancing test on a rotor assembly. The rotor assembly includes a rotor shaft, a rotor support and a turbine casing rotatably connected to both ends of the rotor shaft. The rotor shaft, the rotor support and the turbine casing are coaxially arranged. The high-speed dynamic balancing device includes:

[0041] a first positioning mechanism, wherein a first end of the first positioning mechanism is detachably connected to a driving mechanism coaxially arranged with the first positioning mechanism, an output end of the driving mechanism is provided with a spline shaft 606 for connecting to the rotor shaft, and a second end of the first positioning mechanism is used for positioning connection with the rotor support;

[0042] a second positioning mechanism, the second positioning mechanism and the first positioning mechanism are axially spaced apart and the spacing is adjustable, the second positioning mechanism being used for positioning and connecting with the turbine casing;

[0043] A center positioning mechanism, comprising a front swing frame 300 and a rear swing frame 400, wherein the front swing frame 300 is used to support the first positioning mechanism and adjust the positioning height of the first positioning mechanism, and the rear swing frame 400 is used to support the second positioning mechanism and adjust the positioning height of the second positioning mechanism so that the first positioning mechanism and the second positioning mechanism are coaxial;

[0044] a connecting mechanism, the connecting mechanism being used to detachably connect the first positioning mechanism and the second positioning mechanism so that the second positioning mechanism is rigidly fixed relative to the first positioning mechanism;

[0045] The driving mechanism is used to drive the rotor shaft to rotate on the front positioning mechanism and the second positioning mechanism to perform a high-speed dynamic balancing test.

[0046] In this embodiment, the first positioning mechanism and the second positioning mechanism are separated so that the spacing distance between them can be adjusted, thereby adapting to the measurement of rotor assemblies of different lengths. The front swing frame 300 and the rear swing frame 400 of the center positioning mechanism support the first positioning mechanism and the second positioning mechanism respectively, and the front swing frame 300 is used to support the first positioning mechanism and adjust the height of the center axis of the first positioning mechanism, and the rear swing frame 400 is used to support the second positioning mechanism and adjust the height of the center axis of the second positioning mechanism so that the first positioning mechanism and the second positioning mechanism are coaxial. Then, by setting a connecting structure, the second positioning mechanism is rigidly fixed relative to the first positioning mechanism, which plays a role in protecting the rotor assembly and avoiding irreversible deformation of the rotor assembly due to force when the high-speed dynamic balancing device is hoisted. The driving mechanism is optimized so that a spline shaft 606 is set at the output end of the driving shaft. The spline shaft 606 can be replaced to adapt to the rotor shaft of different models, and the output end of the driving mechanism is used to connect with the rotor shaft and drive the rotor shaft to rotate for high-speed dynamic balancing tests.

[0047] During specific implementation, first check whether there are any abnormalities in the various components of the high-speed dynamic balancing device, and clean the various components and the rotor assembly that needs to be inspected, then assemble the first positioning mechanism with the driving mechanism, and select the spline shaft 606 that is compatible with the rotor assembly and install it on the driving mechanism, then install the rotor assembly with the first positioning mechanism and the second positioning mechanism, and rigidly connect the first positioning mechanism and the second positioning mechanism through the connecting mechanism, then place the front pendulum frame 300 and the rear pendulum frame 400 on the guide rail on the high-speed balancing machine, and adjust the distance between the front pendulum frame 300 and the rear pendulum frame 400 according to the length of the rotor assembly, then install the first positioning mechanism on the front pendulum frame 300, and the second positioning mechanism on the rear pendulum frame 400, and finally connect the driving mechanism to the output end of the high-speed balancing machine, drive the driving mechanism through the output end, and then drive the rotating assembly to rotate for testing.

[0048] In summary, by providing a universal drive mechanism, a first positioning mechanism, a second positioning mechanism, and a central positioning mechanism, the design is simplified, significantly reducing design and manufacturing costs, facilitating assembly, and improving efficiency. A connecting mechanism is also provided to rigidly secure the second positioning mechanism relative to the first positioning mechanism, preventing uncontrolled deformation of the component's long axis due to stress during hoisting and other processes. This device is adaptable to testing of various rotor assemblies and is easy to install, use, and operate. It improves the efficiency of high-speed balancing, significantly reduces aircraft assembly costs, and provides strong support and reliability for aircraft production and assembly.

[0049] Furthermore, the first positioning mechanism includes a front positioning bushing 100, a front positioning ring 101 and an adapter positioning ring 102, the front positioning bushing 100 is used to support the rotor support and make the rotor support coaxial with the front positioning bushing 100, the front positioning ring 101 is detachably connected to the front positioning bushing 100 and to the rotor support, the first end of the adapter positioning ring 102 is detachably connected to the driving mechanism, the second end of the adapter positioning ring 102 is detachably connected to the front positioning ring 101, and the front positioning bushing 100, the front positioning ring 101, the adapter positioning ring 102 and the driving mechanism are coaxially arranged.

[0050] In this embodiment, a slot is provided at one end of the front positioning sleeve 100 connected to the front positioning ring 101, the front positioning ring 101 is embedded in the slot, and the front positioning ring 101 is connected to the front positioning sleeve 100 by bolts, the first end of the adapter positioning ring 102 is detachably connected to the driving mechanism, and the second end of the adapter positioning ring 102 is detachably connected to the front positioning ring 101. Different driving mechanisms can be matched with the front positioning ring 101 by changing the size of the adapter positioning ring 102, thereby improving the versatility of the rotor support installation, and an elastic retaining ring is provided at the bolt connecting the adapter positioning ring 102 and the front positioning ring 101 to reduce the impact on the first positioning mechanism during the test rotation of the rotor shaft, and to reduce the noise generated by vibration and the wear on the first positioning mechanism. In another embodiment, in order to facilitate the oil supply to the bearings in the rotor support, an oil baffle and an oil inlet adapter are provided at the end of the front positioning sleeve 100 away from the front positioning ring 101, wherein the oil baffle barrel bolt is detachably connected to the positioning sleeve, and a circular hole for the rotor shaft to pass through is opened on the oil baffle, and the circular hole is coaxial with the positioning sleeve, and the oil inlet adapter is provided on the oil baffle. Specifically, the oil inlet adapter is used to lubricate the bearings in the rotor support to prevent problems such as bearing wear and obstructed rotor shaft rotation during the rotation of the rotor shaft; the lubricating oil will be thrown out in the rotating parts as the rotor shaft rotates, and the oil baffle prevents the lubricating oil from splashing everywhere, and at the same time provides an installation support surface for the oil inlet adapter.

[0051] Furthermore, the second positioning mechanism includes a rear positioning bushing 200 and a rear positioning ring 201, wherein the rear positioning bushing 200 is used to support the turbine casing and make the turbine casing coaxial with the rear positioning bushing 200, and the rear positioning ring 201 is coaxially arranged with the turbine casing and is detachably connected.

[0052] In this embodiment, the rear locating ring 201 is detachably mounted on the rear locating sleeve 200 by bolts, and a lying retaining ring is provided on the bolt to reduce the impact on the second positioning mechanism during the test rotation of the rotor shaft, and to reduce the noise generated by vibration and the wear on the second positioning mechanism. In addition, multiple groups of holes can be arranged radially on the rear locating ring 201 to install different turbine casings, and the rear locating sleeve 200 is used to provide stable support for the turbine casing.

[0053] Furthermore, the front swing frame 300 includes a front half-ring support member 301, a front clamping half-ring 302 and a front fastener 303. The front half-ring support member 301 is used to support the front positioning bushing 100. The front clamping half-ring 302 is detachably connected to the front half-ring support member 301 through the front fastener 303. The front clamping half-ring 302 and the front half-ring support member 301 are used to clamp the front positioning bushing 100 to each other and radially position the front positioning bushing 100.

[0054] In this embodiment, the front fastener 303 is a bolt, and the front half-ring support seat is used for the front positioning bushing 100. The front half-ring support seat protrudes outward in the horizontal direction to form a front connecting lower protrusion. The corresponding front clamping half-ring 302 is also provided with a front connecting upper protrusion for cooperating with the front connecting lower protrusion at one end connected to the front half-ring support. The front connecting lower protrusion and the front connecting upper protrusion are connected and fixed by bolts, so that the front half-ring support seat and the front clamping half-ring 302 are spliced ​​to form an annular structure for supporting the positioning bushing. Since the front half-ring support seat and the front clamping half-ring 302 are both large-volume metal parts, they usually need to be hoisted and moved. In order to ensure that the front half-ring support seat can still maintain a horizontal state during movement, a lifting ring is provided on the two corresponding front connecting lower protrusions arranged in the horizontal direction of the front half-ring support seat, and a lifting ring is provided on the top of the front clamping half-ring 302.

[0055] Furthermore, the rear swing frame 400 includes a rear half-ring support member 401, a rear clamping half-ring 402 and a rear fastener 403. The rear half-ring support member 401 is used to support the rear positioning bushing 200. The rear clamping half-ring 402 is detachably connected to the rear half-ring support member 401 through the rear fastener 403. The rear clamping half-ring 402 and the rear half-ring support member 401 are used to clamp the rear positioning bushing 200 to each other and radially position the rear positioning bushing 200.

[0056] In this embodiment, the rear fastener 403 is a bolt, and the rear semi-ring support seat is used for the rear positioning bushing 200. The rear semi-ring support seat protrudes outward in the horizontal direction to form a rear connection lower protrusion. The corresponding rear pressing semi-ring 402 is also provided with a rear connection upper protrusion for cooperating with the rear connection lower protrusion at one end connected to the rear semi-ring support. The rear connection lower protrusion and the rear connection upper protrusion are connected and fixed by bolts, so that the rear semi-ring support seat and the rear pressing semi-ring 402 are spliced ​​to form an annular structure for supporting the positioning bushing. Since the rear semi-ring support seat and the rear pressing semi-ring 402 are both large-volume metal parts, they usually need to be hoisted and moved. In order to ensure that the rear semi-ring support seat can still maintain a horizontal state during movement, two corresponding rear connection lower protrusions arranged in the horizontal direction of the rear semi-ring support seat are provided with lifting rings, and the top of the rear pressing semi-ring 402 is provided with a lifting ring. In another embodiment, a threaded hole is opened at the bottom of the annular inner ring of the rear half-ring support seat, and a lifting ring can be detachably connected to the threaded hole by a screw, so that when the rear half-ring support seat needs to be lifted, the lifting ring is installed and then used to move the rear half-ring support seat, and when the rear positioning bushing 200 needs to be installed, the lifting ring installed on the rear half-ring support seat is removed.

[0057] Furthermore, the connecting mechanism includes a connecting block 500, a support rod 501, a fixing nut 504 and an adjusting nut 505. The first end of the connecting block 500 is detachably connected to the front positioning bushing 100, and the second end of the connecting block 500 is extended radially outward along the front positioning bushing 100. The two ends of the support rod 501 are respectively provided with a first threaded portion 502 and a second threaded portion 503. The first threaded portion 502 is threadedly connected to the rear positioning bushing 200, and the second threaded portion 503 passes through the second end of the connecting block 500 and is connected to the fixing nut 504. The adjusting nut 505 is connected to the second threaded portion 503 and is located on the side of the connecting block 500 away from the fixing nut 504. The adjusting nut 505 is used to adjust the spacing distance between the connecting block 500 and the rear positioning bushing 200.

[0058] In this embodiment, the connection mechanism includes a connecting block 500, a support rod 501, a fixing nut 504, and an adjusting nut 505. The above structures cooperate to assemble the front locating bushing 100 and the rear locating bushing 200 into a rigid structure, which protects the rotor shaft. This ensures that the front locating bushing 100 and the rear locating bushing 200, which support the rotor shaft, remain relatively stationary during rotation, thus preventing irreversible deformation of the rotor shaft due to torsional forces. The second threaded portion 503 includes an end thread and an adjusting thread. The end thread passes through the connecting block 500 and connects to the fixing nut 504. The radial dimension of the adjusting thread is greater than the radial dimension of the circular hole in the connecting block 500 through which the end thread passes, so the adjusting thread cannot pass through the circular hole in the connecting block 500. The adjusting nut 505 mates with the adjusting thread and abuts the connecting block 500. When adjusting the distance between the connecting block 500 and the rear positioning bushing 200, first loosen the fixing nut 504, and then rotate the adjusting nut 505. If the adjusting nut 505 is moved toward the rear positioning bushing 200, then when the fixing nut 504 is tightened, the distance between the adjusting connecting block 500 and the rear positioning bushing 200 is reduced. If the adjusting nut 505 is moved toward the rear positioning bushing 200, then when the fixing nut 504 is tightened, the distance between the adjusting connecting block 500 and the rear positioning bushing 200 is increased.

[0059] Furthermore, the connection mechanism is provided in multiple groups, and the multiple groups of connection mechanisms are spaced apart along the circumference of the front positioning bushing 100. In this embodiment, the provision of multiple groups of connection mechanisms can combine the front positioning bushing 100, the connection mechanism, and the rear positioning bushing 200 into a rigid frame, thereby improving the support stability of the rotor shaft.

[0060] Furthermore, the driving mechanism includes an outer shell 600, a support bearing 601, a connecting shaft 602, a spline shaft 606 and an elastic member 605. The outer shell 600 is detachably connected to the first end of the adapter positioning ring 102 and is coaxially arranged with the adapter positioning ring 102. A bearing groove is provided in the outer shell 600, and the support bearing 601 is embedded in the bearing groove. The connecting shaft 602 is passed through the inner ring of the support bearing 601 so that the connecting shaft 602 and the outer shell 600 are connected. Coaxially, the first end of the connecting shaft 602 is used to be connected to the output shaft of the high-speed dynamic balancing machine, and the second end of the connecting shaft 602 is sequentially provided with a spline groove 603 and a receiving groove 604 in the direction toward the first end of the connecting shaft 602. The first end of the spline shaft 606 is connected to the spline groove 603 and is coaxial with the connecting shaft 602. The elastic member 605 is arranged in the receiving groove 604 and abuts against the first end of the spline shaft 606. The second end of the spline shaft 606 is used to be connected to the rotor shaft.

[0061] In this embodiment, elastic member 605 is a compression spring, used to facilitate adjustment of the rotor shaft within tolerance without changing the spacing between the front locating bushing 100 and the rear locating bushing 200. Specifically, when the rotor shaft size is larger than the median value, elastic member 605 pushes the spline shaft 606 into the receiving groove 604, at which point elastic member 605 is in a compressed state. When the rotor shaft size is smaller than the median value, elastic member 605 returns to its original position under the action of the elastic force, pressing the spline shaft 606 against the spline shaft. The drive mechanism replaces a conventional process shaft to drive the entire rotor assembly. The support bearing 601 utilizes a high-quality double-inner-ring double-row angular contact ball bearing, which occupies a smaller space while being able to withstand radial and bidirectional axial loads, limiting bidirectional axial movement of the rotor shaft and outer housing 600. It has high rigidity and stability and can withstand overturning moments. The outer housing 600 is coaxially positioned with the rotor shaft, thereby improving the coaxiality accuracy of the drive system and the rotor system and eliminating interference from drive system imbalance on the rotor system. The output end of the drive shaft is provided with a spline shaft 606, which can be replaced to adapt to rotor shafts of different models, and the output end of the drive mechanism is used to connect with the rotor shaft and drive the rotor shaft to rotate for high-speed dynamic balancing test.

[0062] Furthermore, a quick pipe joint 607 for supplying oil to the support bearing 601 is provided on the outer shell 600 , and a pipe plug 608 for sealing the quick pipe joint 607 is detachably connected to the quick pipe joint 607 .

[0063] In this embodiment, considering the problem of lubrication of the support bearing 601, a quick pipe joint 607 for supplying oil to the support bearing 601 is provided on the outer shell 600, so that lubricating oil can be input into the support bearing 601, so that the support bearing 601 remains lubricated.

[0064] Furthermore, the connection mechanism is provided with a lifting lug 700 for connecting to a lifting device.

[0065] In this embodiment, the provision of the lifting lugs 700 facilitates the lifting of the first positioning mechanism and the second positioning mechanism, so as to facilitate their assembly with the central positioning mechanism.

[0066] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A high-speed dynamic balancing device for performing a high-speed dynamic balancing test on a rotor assembly, wherein the rotor assembly comprises a rotor shaft, a rotor support rotatably connected to both ends of the rotor shaft, and a turbine casing, wherein the rotor shaft, the rotor support, and the turbine casing are coaxially arranged, and wherein: The high-speed dynamic balancing device comprises: a first positioning mechanism, wherein a first end of the first positioning mechanism is detachably connected to a driving mechanism coaxially arranged with the first positioning mechanism, an output end of the driving mechanism is provided with a spline shaft (606) for connecting to the rotor shaft, and a second end of the first positioning mechanism is used for positioning connection with the rotor support; a second positioning mechanism, the second positioning mechanism and the first positioning mechanism are axially spaced apart and the spacing is adjustable, the second positioning mechanism being used for positioning and connecting with the turbine casing; A center positioning mechanism, the center positioning mechanism comprising a front swing frame (300) and a rear swing frame (400), the front swing frame (300) being used to support the first positioning mechanism and adjust the positioning height of the first positioning mechanism, and the rear swing frame (400) being used to support the second positioning mechanism and adjust the positioning height of the second positioning mechanism so that the first positioning mechanism and the second positioning mechanism are coaxial; a connecting mechanism, the connecting mechanism being used to detachably connect the first positioning mechanism and the second positioning mechanism so that the second positioning mechanism is relatively fixed with respect to the first positioning mechanism; The driving mechanism is used to drive the rotor shaft to rotate on the first positioning mechanism and the second positioning mechanism to perform a high-speed dynamic balancing test; The first positioning mechanism comprises a front positioning bushing (100), a front positioning ring (101) and an adapter positioning ring (102); the front positioning bushing (100) is used to support the rotor support and make the rotor support coaxial with the front positioning bushing (100); the front positioning ring (101) is detachably connected to the front positioning bushing (100) and is used to be detachably connected to the rotor support; a first end of the adapter positioning ring (102) is detachably connected to the driving mechanism; a second end of the adapter positioning ring (102) is detachably connected to the front positioning ring (101); the front positioning bushing (100), the front positioning ring (101), the adapter positioning ring (102) and the driving mechanism are coaxially arranged; The second positioning mechanism comprises a rear positioning bushing (200) and a rear positioning ring (201), wherein the rear positioning bushing (200) is used to support the turbine casing and make the turbine casing coaxial with the rear positioning bushing (200), and the rear positioning ring (201) is coaxially arranged with the turbine casing and detachably connected; The connecting mechanism comprises a connecting block (500), a support rod (501), a fixing nut (504) and an adjusting nut (505); the first end of the connecting block (500) is detachably connected to the front positioning bushing (100); the second end of the connecting block (500) is radially outwardly extended along the front positioning bushing (100); the two ends of the support rod (501) are respectively provided with a first threaded portion (502) and a second threaded portion (503); the first threaded portion (502) is threadedly connected to the rear positioning bushing (200); the second threaded portion (503) passes through the second end of the connecting block (500) and is connected to the fixing nut (504); the adjusting nut (505) is connected to the second threaded portion (503) and is located on a side of the connecting block (500) away from the fixing nut (504); the adjusting nut (505) is used to adjust the spacing distance between the connecting block (500) and the rear positioning bushing (200).

2. The high-speed dynamic balancing device according to claim 1, characterized in that: The front swing frame (300) includes a front half-ring support member (301), a front pressing half-ring (302) and a front fastener (303), wherein the front half-ring support member (301) is used to support the front positioning bushing (100), and the front pressing half-ring (302) is detachably connected to the front half-ring support member (301) via the front fastener (303), and the front pressing half-ring (302) and the front half-ring support member (301) are used to clamp the front positioning bushing (100) with each other and radially position the front positioning bushing (100).

3. The high-speed dynamic balancing device according to claim 1, characterized in that: The rear swing frame (400) includes a rear semi-ring support member (401), a rear pressing semi-ring (402) and a rear fastener (403), wherein the rear semi-ring support member (401) is used to support the rear positioning bushing (200), and the rear pressing semi-ring (402) is detachably connected to the rear semi-ring support member (401) via the rear fastener (403), and the rear pressing semi-ring (402) and the rear semi-ring support member (401) are used to clamp the rear positioning bushing (200) with each other and radially position the rear positioning bushing (200).

4. The high-speed dynamic balancing device according to claim 1, characterized in that: The connection mechanisms are provided in multiple groups, and the multiple groups of connection mechanisms are distributed at intervals along the circumference of the front positioning bushing (100).

5. The high-speed dynamic balancing device according to claim 1, characterized in that: The driving mechanism comprises an outer shell (600), a supporting bearing (601), a connecting shaft (602) and an elastic member (605); the outer shell (600) is detachably connected to the first end of the adapter positioning ring (102) and is coaxially arranged with the adapter positioning ring (102); a bearing groove is provided in the outer shell (600); the supporting bearing (601) is embedded in the bearing groove; the connecting shaft (602) is passed through the inner ring of the supporting bearing (601) so that the connecting shaft (602) and the outer shell (600) are coaxial; The first end of the connecting shaft (602) is used to be connected to the output shaft of the high-speed dynamic balancing machine, the second end of the connecting shaft (602) is provided with a spline groove (603) and an accommodating groove (604) in sequence along the direction toward the first end of the connecting shaft (602), the first end of the spline shaft (606) is connected to the spline groove (603) and is coaxial with the connecting shaft (602), the elastic member (605) is arranged in the accommodating groove (604) and abuts against the first end of the spline shaft (606), and the second end of the spline shaft (606) is used to be connected to the rotor shaft.

6. The high-speed dynamic balancing device according to claim 5, characterized in that: The outer shell (600) is provided with a quick pipe joint (607) for supplying oil to the support bearing (601), and the quick pipe joint (607) is detachably connected with a pipe plug (608) for sealing the quick pipe joint (607).

7. The high-speed dynamic balancing device according to any one of claims 1 to 6, characterized in that: The connection mechanism is provided with a lifting lug (700) for connecting to a lifting device.

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