Low-vortex disc assembly balancing device and low-vortex disc assembly assembling and balancing process

Abstract

The invention discloses a balancing device for a low-vortex disc assembly. The low-vortex disc assembly comprises a turbine disc and turbine blades. The low-vortex disc assembly balancing device comprises a balancing machine, a balancing tool and a lifting table, and the balancing tool is arranged in the center of the balancing machine and connected with the turbine disc; the lifting platform is arranged on the balancing machine and comprises a first lifting surface and a second lifting surface, the first lifting surface is used for placing the turbine disc, the turbine disc and the balancing tool can be assembled or disassembled by adjusting the height position of the first lifting surface, and the second lifting surface is used for placing the turbine blade. The turbine blades and the turbine disc can be assembled or disassembled by adjusting the height position of the second lifting face. The invention further provides a low-vortex disc assembly assembling and balancing process.

Description

Technical Field

[0001] The invention relates to the technical field of engine assembly, and in particular to a low-vortex disk assembly balancing device and a low-vortex disk assembly assembly and balancing process. Background Art

[0002] The low-pressure turbine rotor is an important part of the aircraft engine. It is composed of a multi-stage low-vortex disk assembly. The low-vortex disk assembly is composed of a turbine disk, turbine blades, and blade retaining rings. Figure 1 and Figure 2 As shown. The inner side of the moving blade adopts a tenon structure to be installed in the tenon groove of the turbine disk. The serrated blade crowns on the outer side of the moving blade bite each other to increase the rigidity of the blade connection. The inner side of the blade is provided with a limit claw to form a slot with the end face of the blade tenon. The blade retaining ring is installed in the slot to form an axial limit structure to prevent the moving blade from falling off the turbine disk. In order to reduce the impact of the rotor imbalance on the engine vibration, the turbine disc assembly of each stage must be statically balanced before the low-pressure turbine is assembled, and the residual imbalance is ensured to meet the design value by adjusting the blade installation sequence.

[0003] Current technology such as Figure 3 As shown in the figure, the assembly and balancing of the low-vortex disc assembly of the engine belong to two different processes, which are independent of each other. After the low-vortex disc assembly is assembled, it is hoisted to the vertical balancing machine through a special hoist to measure the residual unbalance of the low-vortex disc assembly. If the residual unbalance does not meet the design requirements, the disc assembly is separated from the balancing machine through a special hoist, and after the blade installation sequence is readjusted, it is installed on the balancing machine again to measure the unbalance. Because the assembly process and the balancing process are relatively independent, the assembly operation needs to be completed at the assembly station, and the measurement of the residual unbalance needs to be completed on the balancing machine. The assembly task of the low-pressure turbine requires repeated switching of the work site and the turnover of parts between different work sites. To achieve the goal of qualified balance of the low-vortex disc assembly, it is necessary to install and disassemble the hoist, repeatedly go up and down the balancing machine, repeatedly disassemble and assemble, and repeatedly position, which introduces unnecessary assembly errors and affects the balancing accuracy. The operation is extremely cumbersome, and the balancing efficiency is low. It cannot meet the current situation of urgent tasks and insufficient manpower in the development stage of the engine under development. It takes about 4 people / day to complete the assembly of the low-pressure turbine disc assembly. Summary of the invention

[0004] An object of the present invention is to provide a low-vortex disk assembly balancing device, which can realize the assembly of the low-vortex disk assembly on a balancing machine, integrate the assembly process with the balancing process, and improve the assembly quality and efficiency.

[0005] The low-vortex disk assembly includes a turbine disk and a turbine blade; the low-vortex disk assembly balancing device includes:

[0006] Balancing machines;

[0007] a balancing tool, arranged at the center of the balancing machine and connected to the turbine disk; and a lifting platform, arranged on the balancing machine, comprising a first lifting surface and a second lifting surface,

[0008] Among them, the first lifting surface is used to place the turbine disc, and adjusting the height position of the first lifting surface can realize the installation or disassembly of the turbine disc and the balancing tooling, and the second lifting surface is used to place the turbine blades, and adjusting the height position of the second lifting surface can realize the installation or disassembly of the turbine blades and the turbine disc.

[0009] In one or more embodiments, the first lifting surface or the second lifting surface is supported on the balancing machine by a sliding rod mechanism, and the sliding rod mechanism includes a plurality of sliding rods, one end of the sliding rod is arranged on the base of the balancing machine, and the other end is connected to the first lifting surface or the second lifting surface.

[0010] In one or more embodiments, the sliding rod mechanism further includes a transmission assembly, and the plurality of sliding rods are transmission-connected via the transmission assembly to achieve coordinated adjustment of the plurality of sliding rods.

[0011] In one or more embodiments, a plurality of adjustable support parts are further provided on the second lifting surface, and auxiliary support for the turbine disk can be achieved by adjusting the height positions of the adjustable support parts.

[0012] In one or more embodiments, the balancing tooling includes a support disk, a counterweight and a radial positioning pillar, a plurality of the counterweights are circumferentially arranged on the outer peripheral side of the support disk, the radial positioning pillars are arranged on the support disk, and the turbine disk is connected to the balancing tooling via the radial positioning pillars.

[0013] In one or more embodiments, a radial positioning hole is provided on the turbine disk, and the connection between the turbine disk and the balancing tooling is achieved through the small clearance between the radial positioning hole and the radial positioning support.

[0014] In one or more embodiments, the balancing tooling further comprises an axial limit support, the axial limit support has an axial limit platform, an axial limit hole is opened on the turbine disc, the support is mounted on the axial limit platform through the axial limit hole, and is clamped and fixed by fasteners.

[0015] In one or more embodiments, the balancing machine has a rotating shaft, and the balancing tool is provided with a rotating shaft mounting hole, and the rotating shaft mounting hole cooperates with the rotating shaft stop to achieve synchronous rotation of the balancing tool and the balancing machine.

[0016] In one or more embodiments, the turbine blade is provided with a tenon portion, and the turbine disk is provided with a tenon groove portion, and the tenon portion can be pushed into the tenon groove portion by adjusting the second lifting surface to achieve installation of the turbine blade and the turbine disk;

[0017] The turbine blade is also provided with a limit claw, the limit claw and the end surface of the tenon head form a groove, and the stopper is installed in the groove to form an axial limit for the turbine blade.

[0018] In one or more embodiments, the low-vortex disk assembly balancing device also includes a control system for controlling the moving distance and moving speed of the second lifting surface to control the feed amount of the turbine blades during the installation and disassembly of the low-vortex disk assembly.

[0019] In one or more embodiments, the second lifting surface is coated with a protective layer.

[0020] In one or more embodiments, the first lifting surface is coated with a protective layer.

[0021] In one or more embodiments, the protective layer is made of non-metallic materials such as cloth-reinforced bakelite, fluoroplastics, etc.

[0022] Another object of the present invention is to provide a low-vortex disk assembly assembly and balancing process, which can integrate the assembly process with the balancing process to improve assembly quality and efficiency.

[0023] The low-vortex disk assembly assembly and balancing process adopts the low-vortex disk assembly balancing device as described above, and the low-vortex disk assembly assembly and balancing process includes the following steps:

[0024] S1, placing the turbine disk on the first lifting surface, and adjusting the height position of the first lifting surface so that the turbine disk is mounted on the balancing tool;

[0025] S2. measuring the unbalance of the turbine disk;

[0026] S3, sorting the turbine blades, and placing the turbine blades on the second lifting surface according to the sorting result to form a complete ring;

[0027] S4, adjusting the height position of the second lifting surface so that the turbine blade is mounted on the turbine disk to form the low-vortex disk assembly;

[0028] S5, measuring the unbalance amount of the low-vortex disc assembly;

[0029] S6. Determine whether the remaining unbalance meets the assembly requirements:

[0030] If the residual imbalance meets the assembly requirements, the assembly of the low-vortex disk assembly is completed; if the residual imbalance does not meet the assembly requirements, step S7 is executed, the height position of the second lifting surface is adjusted to separate the turbine blade from the turbine disk, the placement position of the turbine blade is adjusted according to the measurement results, and then steps S5 to S6 are repeated until the residual imbalance meets the assembly requirements.

[0031] In one or more embodiments, between steps S1 and S2, the following steps are further included:

[0032] S101, adjusting the height position of the first lifting surface to lift the turbine disc from the balancing machine, rotating the balancing tool by 180 degrees and then reinstalling it on the balancing machine.

[0033] In one or more embodiments, in steps S3 to S4, the turbine blades are installed in a high-position installation manner:

[0034] The height position of the second lifting surface is adjusted to raise it to a high position, the turbine blade is placed on the second lifting surface according to the sorting result, and the height position of the second lifting surface is adjusted again to move it downward so that the turbine blade is installed on the turbine disk.

[0035] In one or more embodiments, in steps S3 to S4, the turbine blades are installed in a low-position installation manner:

[0036] The height position of the second lifting surface is adjusted to lower it to a low position, the turbine blade is placed on the second lifting surface according to the sorting result, and the height position of the second lifting surface is adjusted again to move it upward so that the turbine blade is installed on the turbine disk.

[0037] In one or more embodiments, in step S7, during the separation or reinstallation of the turbine blade, the height position of the second lifting surface is controlled to separate the turbine blade from the turbine disk or install it on the turbine disk with a smaller feed amount each time.

[0038] Compared with the prior art, this application has at least the following beneficial effects:

[0039] The above-mentioned low-vortex disk assembly balancing device can realize the assembly and disassembly of the low-vortex disk assembly on the balancing machine by arranging a lifting platform on the balancing machine which can respectively raise and lower the height of the turbine disk and the turbine blade. The assembly and balancing processes of the low-vortex disk assembly can be integrated, which greatly reduces the number of times the low-vortex disk assembly goes on and off the balancing machine and improves the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0041] Figure 1 is a top view of a low-vortex disc assembly according to an embodiment of the present application.

[0042] Figure 2 It is a side view of a low-vortex disk assembly according to an embodiment of the present application.

[0043] Figure 3 It is a flow chart of the existing low-pressure turbine disc assembly assembly process and balancing process.

[0044] Figure 4 It is a stereoscopic diagram of a low-vortex disk assembly balancing device according to an embodiment of the present application.

[0045] Figure 5 It is a side view of a low-vortex disk assembly balancing device according to an embodiment of the present application.

[0046] Figure 6 It is a side view of a lifting platform according to an embodiment of the present application.

[0047] Figure 7 It is a side view of a lifting platform and a turbine disc according to an embodiment of the present application.

[0048] Figure 8 It is a side view of a lifting platform and a low-vortex disc assembly according to an embodiment of the present application.

[0049] Fig. 9 It is a three-dimensional diagram of a balancing tool according to an embodiment of the present application.

[0050] Fig.10 It is a side view of a balancing tool according to an embodiment of the present application.

[0051] Fig.11 It is a flow chart of the assembly and balancing process of the low-vortex disk assembly according to one embodiment of the present application. DETAILED DESCRIPTION

[0052] The present invention is further described below in conjunction with specific embodiments and drawings. More details are described in the following description to facilitate a full understanding of the present invention, but the present invention can obviously be implemented in a variety of other ways different from the description. Those skilled in the art can make similar generalizations and deductions based on actual application situations without violating the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment. It should be noted that these and other subsequent drawings are only examples, which are not drawn according to the conditions of equal proportions, and should not be used as a limitation on the protection scope of the actual requirements of the present invention.

[0053] In order to solve at least one of the problems existing in the current assembly and balancing process of the aforementioned low-vortex disk assembly of the aircraft engine, according to one aspect of the present application, a low-vortex disk assembly balancing device is provided, which can realize the assembly of the low-vortex disk assembly 1 on the balancing machine 2, integrate the assembly process with the balancing process, and improve the assembly quality and efficiency.

[0054] refer to Figure 1 and Figure 2 The low-vortex disc assembly 1 includes a turbine disc 11 and a turbine blade 12. The turbine blade 12 is provided with a tenon portion, and the turbine disc 11 is provided with a tenon groove portion. The turbine blade 12 and the turbine disc 11 are installed by means of mortise and tenon joints.

[0055] refer to Figure 4 and Figure 5 , a specific embodiment of a low-vortex disk assembly balancing device shown in the figure is used as an example for explanation. The low-vortex disk assembly balancing device includes a balancing machine 2, a balancing tool 3 and a lifting platform 4. The balancing tool 3 is arranged at the center of the balancing machine 2 and is connected to the turbine disk 11. The lifting platform 4 is arranged on the balancing machine 2 and includes a first lifting surface 41 and a second lifting surface (not shown in the figure). The first lifting surface 41 is used to place the turbine disk 11. Adjusting the height position of the first lifting surface 41 can realize the installation or removal of the turbine disk 11 and the balancing tool 3. The second lifting surface is used to place the turbine blade 12. Adjusting the height position of the second lifting surface can realize the installation and removal of the turbine blade 12 and the turbine disk 11.

[0056] It should be understood that the first lifting surface 41 and the second lifting surface can be provided by the first lifting platform and the second lifting platform of the lifting platform 4, respectively, although not shown in the figure. Figure 4 In the illustrated embodiment, the second lifting platform is another height-adjustable lifting platform disposed on the first lifting platform. After the turbine disc 11 is mounted on the balancing tool 3 by adjusting the first lifting platform, the turbine blade 12 can be mounted on the turbine disc by adjusting the second lifting platform. In other embodiments, the first lifting platform and the second lifting platform can be two independent lifting platforms, or the lifting platform can also adopt other different lifting structures, as long as the lifting platform provides a first lifting surface 41 for placing the turbine disc 11 and a second lifting surface for placing the turbine blade 12, so that the installation or removal of the turbine disc 11 and the balancing tool 3, and the turbine blade 12 and the turbine disc 3 can be achieved by adjusting the height positions of the two lifting surfaces.

[0057] The above-mentioned low-vortex disk assembly balancing device is capable of assembling and disassembling the low-vortex disk assembly 1 on the balancing machine 2 by arranging a lifting platform 4 on the balancing machine 2 which can respectively raise and lower the height of the turbine disk 11 and the turbine blade 12. The assembly and balancing processes of the low-vortex disk assembly 1 can be integrated, which greatly reduces the number of times the low-vortex disk assembly 1 is moved on and off the balancing machine 2, thereby improving the assembly efficiency.

[0058] Figures 6 to 8 A specific embodiment of the lifting platform is shown. In this embodiment, the first lifting surface 41 is supported on the balancing machine 2 by a sliding rod mechanism 43. The sliding rod mechanism 43 includes a plurality of sliding rods 431. One end of the sliding rod 431 is arranged on the base of the balancing machine 2, and the other end is connected to the first lifting surface 41 or the second lifting surface. The sliding rod 431 can be extended or shortened by being driven, thereby realizing the rise or fall of the first lifting surface 41.

[0059] In other embodiments, the second lifting surface may be provided by a lifting platform independent of the first lifting surface, and the lifting platform may also be supported on the balancing machine 2 by a sliding rod mechanism 43 .

[0060] Furthermore, the sliding rod mechanism also includes a transmission assembly 44, and the plurality of sliding rods 431 are connected by transmission through the transmission assembly 44 to realize the coordinated rotation of the plurality of sliding rods 431. Specifically, the transmission assembly 44 includes a plurality of transmission gears 441 and a transmission chain 442. The plurality of transmission gears 441 are respectively arranged on the plurality of sliding rods 431. When the sliding rods 431 move under the action of the thread pair, the transmission gears 441 thereon can be driven to rotate synchronously. The plurality of transmission gears 441 are connected to each other through the transmission chain 442. One of the plurality of sliding rods 431 can be a main sliding rod 431a. When the main sliding rod 431a is driven to extend or shorten, the transmission gear 441 on the main sliding rod 431a can drive the transmission gears 441 on other sliding rods 431b to rotate, thereby driving other sliding rods 431b to extend or shorten, thereby realizing the coordinated adjustment of the plurality of sliding rods 431, ensuring the horizontality of the first lifting surface 41 and the second lifting surface during the lifting process, and improving the stability of the lifting platform 4.

[0061] like Figure 7 and Figure 8As shown, the lifting platform 4 can vertically lift the turbine disc 11 from the balancing tooling 3 through the first lifting surface 41, release the constraint relationship between the turbine disc 11 and the balancing tooling 3 and realize the rotation operation of the balancing tooling, and realize the installation and disassembly of the turbine blade 12 on the turbine disc 11 through the second lifting surface. Taking the first lifting surface 41 as an example, during the rising process of the first lifting surface 41, the turbine disc 11 can be vertically lifted from the balancing tooling 3. At this time, the operator can adjust the balancing tooling 3, rotate the balancing tooling 3 180 degrees relative to the turbine disc 11, and then lower the first lifting surface 41 to reinstall the turbine disc 11 on the balancing tooling 3, completing the rotation operation in the balancing process, so as to eliminate the unbalance introduced during the installation process of the balancing tooling 3, realize the pre-adjustment of the balancing device of the low-vortex disc assembly, and improve the balancing accuracy.

[0062] In the traditional balancing process, the operator needs to use a special lifting device to lift the turbine disc vertically from the balancing tool. When lifting, the center of the lifting device must be located at the axis of the turbine disc. This requirement is difficult to meet under manual operation. Once deflection occurs during the lifting process, it will make the turbine disc difficult to disassemble, or generate tension on the balancing tool, causing damage to the balancing tool. Since the balancing tool is directly connected to the rotating shaft of the balancing machine, the tension generated when the lifting is deflected will also cause the rotating shaft of the balancing machine to be stressed, causing damage to the rotating shaft of the balancing machine and affecting the balancing accuracy. The lifting platform 4 used in this application can realize the vertical lifting of the turbine disc 11, avoiding the defects caused by the lifting method used in the traditional balancing process.

[0063] In one or more embodiments, a plurality of adjustable support parts are further provided on the second lifting surface. By adjusting the height position of the adjustable support parts, auxiliary support for the turbine disk can be achieved. The adjustable support part can be a lifting block provided on the second lifting surface. By adjusting the height position of the lifting block, it can be in contact with the turbine disk to play an auxiliary support role.

[0064] In one or more embodiments, the second lifting surface is coated with a protective layer to prevent damage to the lifting platform surface or the turbine blade 12 during the placement and adjustment of the turbine blade 12, and the first lifting surface 41 may also be coated with a protective layer to prevent damage to the lifting platform surface or the turbine disk 11 during the installation of the turbine disk 11. The protective layer may be a non-metallic protective layer, for example, it may be made of non-metallic materials such as cloth-reinforced bakelite, fluoroplastics, etc.

[0065] Fig. 9 and Fig.10A specific embodiment of the balancing tooling is shown, and the balancing tooling 3 is mainly used to support and limit the turbine disk 11 or the low-vortex disk assembly 1. In this embodiment, the balancing tooling 3 includes a support disk 31, a counterweight 32, and a radial positioning pillar 33. A plurality of counterweights 32 are arranged circumferentially on the outer peripheral side of the support disk 31, and the radial positioning pillar 33 is arranged on the support disk 31. The turbine disk 11 is connected to the balancing tooling 3 through the radial positioning pillar 33, so that the turbine disk 11 and the balancing tooling 3 are coaxially installed.

[0066] Furthermore, a radial positioning hole 111 is opened on the turbine disk 11 , and the connection between the turbine disk 11 and the balancing tooling 3 is achieved through the small clearance cooperation between the radial positioning hole 111 and the radial positioning pillar 33 .

[0067] Furthermore, the balancing tooling 3 also includes an axial limiting support 34, which has an axial limiting platform 341. An axial limiting hole 112 is opened on the turbine disk 11. The turbine disk 11 is installed on the axial limiting platform 341 through the axial limiting hole 112, and is clamped and fixed by fasteners 35, so as to achieve axial fixation of the turbine disk 11 on the balancing tooling 3 to prevent the turbine disk 11 or the low-vortex disk assembly 1 from flying off during rotation.

[0068] In one or more embodiments, the balancing machine 2 has a rotating shaft 21, and a rotating shaft mounting hole 36 is provided on the balancing fixture 3. The rotating shaft mounting hole 36 cooperates with the stopper of the rotating shaft 21 to realize the synchronous rotation of the balancing fixture 3 and the balancing machine 2. Figure 6 As shown, in this embodiment, the balancing fixture 3 and the balancing machine 2 are rotated synchronously by means of stopper fit, and the fixed connection between the two is achieved by connecting bolts 6. In other embodiments, the balancing fixture 3 and the balancing machine 2 can also be directly connected by means of interference fit to achieve synchronous rotation and fixed connection.

[0069] In one or more embodiments, the low-vortex disk assembly balancing device further includes a control system for controlling the moving distance and moving speed of the second lifting surface, so as to control the feed amount of the turbine blade 12 during the installation and disassembly process of the low-vortex disk assembly 1. During the installation process of the turbine blade 12, the second lifting surface can be evenly raised or lowered in multiple times, and the height of each movement is constant. The turbine blade 12 can be evenly installed in the mortise and tenon groove on the turbine disk 11 by self-weight or manual pressing.

[0070] Specifically, the balance of the low-vortex disc assembly 1 is to adjust the remaining unbalance by adjusting the installation position of the turbine blade 12. Once the measurement result is unqualified, the disassembly of the turbine blade 12 is inevitably involved. Since the serrated blade crowns of the turbine blade 12 are interlocked, the feed amount of each turbine blade 12 is controlled by the control system during disassembly, and the second lifting surface is lowered by a small distance, and each turbine blade 12 is pressed one by one to contact the surface of the second lifting surface, and then the second lifting surface is lowered by a small distance again, and then the turbine blade 12 is pressed to contact the surface of the second lifting surface, and this is repeated many times to achieve the disassembly of the turbine blade 12 from the turbine disc 11. After adjusting the placement position of the turbine blade 12 on the second lifting surface 42, the second lifting surface is raised by a small distance, and each turbine blade 12 is pushed one by one into the connection between it and the turbine disc, and this is repeated many times to install the turbine blade 12 in place.

[0071] In one or more embodiments, the turbine blade 12 and the turbine disk 11 are installed by mortise and tenon connection. The second lifting surface can be adjusted to push the tenon head into the tenon groove to achieve the installation of the turbine blade 12 and the turbine disk 11. Figure 3 As shown, a limiting claw is also provided on the turbine blade 12, and a groove is formed between the limiting claw and the end surface of the tenon head. The stopper 5 is installed in the groove to form an axial limit for the turbine blade 12 to ensure assembly accuracy.

[0072] According to another aspect of the present application, a low-vortex disk assembly assembly and balancing process is provided, using the low-vortex disk assembly balancing device as described above, such as Fig.11 As shown, the low-vortex disc assembly assembly and balancing process includes the following steps:

[0073] S1, placing the turbine disc 11 on the first lifting surface 41, adjusting the height position of the first lifting surface 41 so that the turbine disc 11 is mounted on the balancing tooling 3;

[0074] S2, measuring the unbalance of the turbine disk 11;

[0075] S3, sorting the turbine blades 12, and placing the turbine blades 12 on the second lifting surface according to the sorting result to form a complete ring;

[0076] S4, adjusting the height position of the second lifting surface so that the turbine blades 12 are mounted on the turbine disk 11 to form a low-vortex disk assembly 1;

[0077] S5, measuring the unbalance amount of the low-vortex disc assembly 1;

[0078] S6. Determine whether the remaining unbalance meets the assembly requirements:

[0079] If the remaining unbalance meets the assembly requirements, the assembly of the low-vortex disc assembly 1 is completed;

[0080] If the remaining imbalance does not meet the assembly requirements, execute step S7, adjust the height position of the second lifting surface 42 to separate the turbine blade 12 from the turbine disk 11, adjust the placement position of the turbine blade 12 according to the measurement results, and then repeat steps S5 to S6 until the remaining imbalance meets the assembly requirements.

[0081] The residual unbalance can be measured by a balancing machine and read through the display screen of the balancing machine. Assume that the measured value of the residual unbalance is Q, and the design control value of the residual unbalance is A. Q is required to be less than A, otherwise it is considered that the assembly requirements are not met.

[0082] The present application forms a new process mode by integrating the assembly process of the low-vortex disk assembly 1 with the balancing process. The assembly work of the low-vortex disk assembly 1 can be completed on the balancing machine 2, and the overall assembly of the crowned low-vortex blades on the balancing machine 2 can be achieved. The assembly process and the balancing process are integrated into one, which greatly reduces the number of times the low-vortex disk assembly 1 is moved on and off the balancing machine 2.

[0083] The above-mentioned low-vortex disc assembly assembly and balancing process integrates the assembly and balancing process of the low-vortex disc assembly 1. After the residual unbalance of the turbine disc 11 is measured by the balancing machine 2, the turbine blades 12 can be sorted by, for example, the four-sector blade light and heavy staggered sorting method. According to the sorting result, the turbine blades 12 are assembled in sequence on the balancing machine 2, and then the residual unbalance of the low-vortex disc assembly 1 is measured. If the residual unbalance of the low-vortex disc assembly 1 does not meet the design requirements, the installation sequence of the turbine blades 12 is adjusted directly on the balancing machine 2 until the residual unbalance meets the design requirements. The low-vortex disc assembly and balancing process can avoid the steps of installing and disassembling the hanger and repeatedly raising and lowering the balancing machine 2, optimize the process flow, and greatly improve the assembly efficiency. According to the test, it only takes 40 minutes to achieve the correct installation of a round of turbine blades 12 using the low-vortex disc assembly and balancing process, and the installation efficiency is 5-10 times that of the original process.

[0084] In one or more embodiments, between steps S1 and S2, the following steps are also included: S101, adjusting the height position of the first lifting surface 41 to lift the turbine disc 11 from the balancing machine 2, and rotating the balancing tool 3 180 degrees and reinstalling it on the balancing machine 2.

[0085] Since the low-vortex disk assembly balancing device can lift the turbine disk 11 independently through the first lifting surface 41, the indexing operation in the balancing process of the low-vortex disk assembly 1 can be realized. In the balancing process, the balancing tool 3 will introduce a balancing error, and the indexing method can be used to separate the error introduced by the balancing tool 3. Before and after the indexing, the installation position of the balancing tool 3 and the turbine disk 11 needs to differ by 180 degrees.

[0086] In the traditional balancing process, since the assembly and balancing process of the low-vortex disk assembly 1 are relatively independent, it is necessary to use a special lifting device to lift the turbine disk 11 from the balancing tool 3, rotate it 180 degrees and then install it on the balancing tool 3. The operation is complicated, and when the lifting device is lifting, the lifting rope is a flexible body, which is difficult to position and easily causes positioning errors.

[0087] By adopting the aforementioned low-vortex disc assembly balancing device, after the assembly and balancing process of the low-vortex disc assembly 1 are integrated, the rotation operation can be realized by only lifting the turbine disc 11 from the balancing fixture 3 on the first lifting surface 41, rotating the balancing fixture 3 180 degrees and then reinstalling it. The repeated installation and disassembly of the special lifting tool is omitted during the rotation process, and the method of lifting the turbine disc 11 by the first lifting surface 41 can ensure that the turbine disc 11 is vertically lifted relative to the balancing fixture 3 (a rigid connection), which has the advantages of accurate positioning and easy centering, and avoids the influence of positioning errors on the balancing accuracy.

[0088] In one or more embodiments, in steps S3 to S4, the turbine blades 12 are installed in a high-position installation manner: the height position of the second lifting surface is adjusted to raise it to a high position, the turbine blades 12 are placed on the second lifting surface according to the sorting result, and then the height position of the second lifting surface is adjusted to move it downward so that the turbine blades 12 are installed on the turbine disk 11.

[0089] In one or more embodiments, in steps S3 to S4, the turbine blade 12 is installed in a low-position installation manner: the height position of the second lifting surface is adjusted to lower it to a low position, the turbine blade 12 is placed on the second lifting surface according to the sorting result, and then the height position of the second lifting surface is adjusted to move it upward so that the turbine blade 12 is installed on the turbine disk 11.

[0090] In one or more embodiments, in step S7, during the separation or reinstallation of the turbine blades 12, the height position of the second lifting surface 42 is controlled to separate the turbine blades 12 from the turbine disk 11 or install them on the turbine disk 11 with a smaller feed amount each time, thereby improving the installation accuracy of the blades.

[0091] For details, please refer to Figure 4 The low-vortex disc assembly balancing device shown in the figure can realize independent lifting of the turbine blade 12 through the second lifting surface, so that the turbine blade 12 can be installed and adjusted on the balancing machine 2. There are two modes for installing the blade on the balancing machine 2: high-position installation and low-position installation.

[0092] 1) High-position installation of turbine blades 12: The second lifting surface rises to a high position, and the turbine blades 12 are placed on the second lifting surface in sequence to form a complete ring. The blades are placed at a consistent height under the support of the lifting platform 4, which can avoid the occurrence of jamming failures caused by misalignment between the blade crown serrations. The second lifting surface can be evenly lowered in multiple times, and the height is constant each time. The turbine blades 12 can sink evenly under their own weight or manual pressure until they completely enter the mortise and tenon of the turbine disk 11.

[0093] 2) Low-position installation of turbine blades 12: Due to testing requirements, some parts of the engine under development need to set measuring points on the moving blades (i.e., turbine blades 12). Since the test line cannot be bent during the assembly process, bending may cause the measuring point to fail. The high-position installation method is not applicable to parts with dynamic stress test lines. At this time, the second lifting surface can be lowered to a low position, and the turbine blades 12 can be placed on the second lifting surface in sequence to form a complete ring. After the whole is formed, the blade crowns will not get stuck, and the turbine blades 12 can be pushed into the mortise as a whole by slowly and evenly lifting the second lifting surface multiple times.

[0094] Whether it is low-position installation or high-position installation, the second lifting surface can lift all turbine blades 12 at the bottom, and can control the feed amount of all turbine blades 12 as a whole during installation and disassembly through the control system, so that the adjacent blade serrated blade crowns and inner edge plates will not be misaligned and stuck, and the installation process of the turbine blades 12 is smooth and uniform, without the need for large knocking force to overcome the misalignment of the blade crown and the edge plate, so that the turbine blades 12 can be installed with zero damage, and will not impact the balancing machine 2, causing damage to the balancing machine 2. Using this low-vortex disc assembly 1 assembly and balancing process, a single person can assemble the low-vortex disc assembly 1 on the balancing machine 2, greatly improving the assembly efficiency of the low-vortex disc assembly 1.

[0095] In addition, when the residual unbalance measurement result of the low-vortex disc assembly 1 on the balancing machine 2 is different from the simulated value in the computer and does not meet the design requirements, the non-percussion disassembly of the turbine blade 12 on the balancing machine 2 can be achieved by adjusting the lifting platform 4, and the operator can quickly adjust the installation sequence of the turbine blade 12 on the second lifting surface to make its residual unbalance meet the design. Since the installation efficiency of the turbine blade 12 is greatly improved, the actual operation process can put forward higher requirements for the residual unbalance, so that the balance of the low-pressure turbine disc 11 can reach a higher quality.

[0096] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A low-vortex disc assembly balancing device, characterized in that: The low-vortex disk assembly includes a turbine disk and a turbine blade; The low vortex disc assembly balancing device comprises: Balancing machines; a balancing tool, arranged at the center of the balancing machine and connected to the turbine disc; and A lifting platform is arranged on the balancing machine, and includes a first lifting surface and a second lifting surface, wherein the first lifting surface is used to place the turbine disc, and adjusting the height position of the first lifting surface can realize the installation or disassembly of the turbine disc and the balancing tooling, and the second lifting surface is used to place the turbine blades, and adjusting the height position of the second lifting surface can realize the installation or disassembly of the turbine blades and the turbine disc.

2. The low-vortex disk assembly balancing device according to claim 1, characterized in that: The first lifting surface or the second lifting surface is supported on the balancing machine through a sliding rod mechanism, and the sliding rod mechanism includes a plurality of sliding rods, one end of the sliding rod is arranged on the base of the balancing machine, and the other end is connected to the first lifting surface or the second lifting surface.

3. The low-vortex disk assembly balancing device according to claim 2, characterized in that: The sliding rod mechanism also includes a transmission assembly, and the multiple sliding rods are transmission-connected through the transmission assembly to achieve coordinated adjustment of the multiple sliding rods.

4. The low-vortex disk assembly balancing device according to claim 1, characterized in that: The second lifting surface is also provided with a plurality of adjustable support parts, and auxiliary support for the turbine disk can be achieved by adjusting the height positions of the adjustable support parts.

5. The low-vortex disk assembly balancing device according to claim 1, characterized in that: The balancing tooling includes a support disk, a counterweight and a radial positioning pillar. A plurality of the counterweights are arranged circumferentially on the outer peripheral side of the support disk. The radial positioning pillar is arranged on the support disk. The turbine disk is connected to the balancing tooling via the radial positioning pillar.

6. The low-vortex disk assembly balancing device according to claim 5, characterized in that: The turbine disk is provided with a radial positioning hole, and the connection between the turbine disk and the balancing tooling is achieved through the cooperation of the radial positioning hole and the small clearance of the radial positioning pillar.

7. The low-vortex disk assembly balancing device according to claim 5, characterized in that: The balancing tool also includes an axial limiting support, which has an axial limiting platform. An axial limiting hole is opened on the turbine disk, and the turbine disk is installed on the axial limiting platform through the axial limiting hole and is tightened and fixed by fasteners.

8. The low-vortex disk assembly balancing device according to claim 1, characterized in that: The balancing machine has a rotating shaft, and the balancing tool is provided with a rotating shaft mounting hole, and the rotating shaft mounting hole cooperates with the rotating shaft stop to realize synchronous rotation of the balancing tool and the balancing machine.

9. The low-vortex disk assembly balancing device according to claim 1, characterized in that: The turbine blade is provided with a tenon portion, and the turbine disk is provided with a tenon groove portion, and the tenon portion can be pushed into the tenon groove portion by adjusting the second lifting surface to achieve installation of the turbine blade and the turbine disk; The turbine blade is also provided with a limit claw, the limit claw and the end surface of the tenon head form a groove, and the stopper is installed in the groove to form an axial limit for the turbine blade.

10. The low-vortex disk assembly balancing device according to claim 1, characterized in that: The low-vortex disk assembly balancing device also includes a control system for controlling the moving distance and moving speed of the second lifting surface to control the feed amount of the turbine blades during the installation and disassembly of the low-vortex disk assembly.

11. The low-vortex disk assembly balancing device according to claim 1, characterized in that: The second lifting surface is coated with a protective layer.

12. The low-vortex disk assembly balancing device according to claim 1, characterized in that: The first lifting surface is coated with a protective layer.

13. The low-vortex disk assembly balancing device according to claim 11 or 12, characterized in that: The protective layer is made of non-metallic materials such as cloth-reinforced bakelite and fluoroplastics.

14. A low-vortex disc assembly assembly and balancing process, characterized in that: The low-vortex disk assembly balancing device according to any one of claims 1 to 13 is used, and the low-vortex disk assembly assembly and balancing process includes the following steps: S1, placing the turbine disk on the first lifting surface, and adjusting the height position of the first lifting surface so that the turbine disk is mounted on the balancing tool; S2. measuring the unbalance of the turbine disk; S3, sorting the turbine blades, and placing the turbine blades on the second lifting surface according to the sorting result to form a complete ring; S4, adjusting the height position of the second lifting surface so that the turbine blade is mounted on the turbine disk to form the low-vortex disk assembly; S5, measuring the unbalance amount of the low-vortex disc assembly; S6. Determine whether the remaining unbalance meets the assembly requirements: If the residual unbalance meets the assembly requirements, the assembly of the low-vortex disc assembly is completed; If the remaining imbalance does not meet the assembly requirements, execute step S7, adjust the height position of the second lifting surface to separate the turbine blade from the turbine disk, adjust the placement position of the turbine blade according to the measurement results, and then repeat steps S5 to S6 until the remaining imbalance meets the assembly requirements.

15. The low-vortex disk assembly balancing device according to claim 14, characterized in that: Between step S1 and step S2, the following steps are also included: S101, adjusting the height position of the first lifting surface to lift the turbine disc from the balancing machine, rotating the balancing tool by 180 degrees and then reinstalling it on the balancing machine.

16. The low-vortex disk assembly assembly and balancing process according to claim 14, characterized in that: In steps S3 to S4, the turbine blades are installed in a high-position installation manner: The height position of the second lifting surface is adjusted to raise it to a high position, the turbine blade is placed on the second lifting surface according to the sorting result, and the height position of the second lifting surface is adjusted again to move it downward so that the turbine blade is installed on the turbine disk.

17. The low-vortex disk assembly assembly and balancing process according to claim 14, characterized in that: In steps S3 to S4, the turbine blades are installed in a low-position installation manner: The height position of the second lifting surface is adjusted to lower it to a low position, the turbine blade is placed on the second lifting surface according to the sorting result, and the height position of the second lifting surface is adjusted again to move it upward so that the turbine blade is installed on the turbine disk.

18. The low-vortex disk assembly assembly and balancing process according to claim 14, characterized in that: In step S7, during the separation or reinstallation process of the turbine blade, the height position of the second lifting surface is controlled to separate the turbine blade from the turbine disk or install it on the turbine disk with a smaller feed amount each time.

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