Rotary joint assembly concentric measuring adjustment device

Abstract

The hinge assembly is not high in assembly precision and has large accumulated error due to lack of real-time monitoring and reliable correction means. In order to improve the assembly precision, the workpiece is measured and corrected by means of the machine tool under the cooperation of the machine tool operator during the bench work assembly. In this way, not only the production resources are occupied, but also the abnormal cooperation of different types of workers and the non-specialty of the work site and platform are involved, resulting in low assembly efficiency. In order to overcome the deficiencies in the prior art, the application provides a rotary joint assembly concentricity measuring and adjusting device, which has measuring and adjusting functions to solve the problem of high-efficiency and high-precision assembly of the rotary joint. The device is convenient and fast to operate, can strengthen the rigidity of the coupling ring, improve the assembly precision, can measure and monitor the concentricity of the shell and the coupling ring in real time during the rotary joint assembly process, and adjust the assembly precision accordingly, so as to realize high-efficiency and high-precision assembly of the rotary joint.

Description

Technical Field

[0001] This invention belongs to the field of assembly technology, and particularly relates to a concentric measurement and adjustment device for rotary joint assembly. Background Technology

[0002] A rotary joint, also known as a coupling or rotational coupling, is a microwave component whose input and output ports can rotate relative to each other. It consists of rotating and stationary parts. In mechanically scanned radar, the rotary joint ensures the normal transmission of electromagnetic energy and signals in each channel of the feed system while the antenna rotates; therefore, it is one of the important components of a mechanically scanned radar system. As radar products become increasingly complex, involving more and more signal channels, the structure of rotary joints has also become increasingly complex, with some rotary joints having dozens of channels. For these complex multi-channel rotary joints, on the one hand, due to the weight and size constraints of radar, their structure is very compact; on the other hand, to achieve stable rotation and signal transmission, high precision is required, especially the concentricity of the coupling ring and its accessories with the housing.

[0003] In complex, multi-channel integrated hinges, if the concentricity between the coupling ring and the housing is not high, the electrical performance of the joint often fluctuates drastically during rotation, severely impacting the overall performance of the radar system. Therefore, the concentricity between the coupling ring and the housing must meet requirements. For high-precision multi-channel stacked hinges, the accuracy of each rotary joint is fundamental and must be guaranteed to ensure the overall accuracy of the stacked assembly. However, the complex yet lightweight structure of the rotary joint results in poor rigidity of the coupling ring, making it prone to deformation during assembly. Furthermore, due to insulation requirements, there are non-metallic components between the coupling ring and the housing, leading to poor self-centering accuracy and making it difficult to guarantee concentricity during assembly. Therefore, the assembly of the rotary joint is a major challenge in the manufacturing process.

[0004] Previously, hinge assembly suffered from low precision and large cumulative errors due to a lack of real-time monitoring and reliable calibration methods. To improve assembly accuracy, fitter assembly typically required machine tool measurement and calibration with the assistance of machine tool operators. This not only consumed production resources but also involved unconventional coordination between different trades and the non-specialized nature of the work area and platform, resulting in low assembly efficiency. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention proposes a concentricity measurement and adjustment device for rotary joint assembly. This device integrates measurement and adjustment functions to solve the problem of efficient and high-precision assembly of rotary joints. It is convenient and quick to operate, strengthens the rigidity of the coupling ring, improves assembly accuracy, and can measure and monitor the concentricity of the shell and coupling ring in real time during the rotary joint assembly process, adjusting the assembly accuracy accordingly to achieve efficient and high-precision assembly of the rotary joint.

[0006] A rotary joint assembly concentricity measurement and adjustment device of the present invention includes a turntable (1), a centering component (2), a clamping component (3), a self-aligning component (4), a measuring component (5), a rotary joint housing (7), and a rotary joint coupling ring (8); wherein, the turntable (1) includes upper and lower parts, the lower part is fixed, and the upper part can rotate around the axis; the centering component (2) is installed on the upper part of the turntable (1) for positioning and fixing the rotary joint coupling ring (8); the clamping component (3) is evenly arranged on the upper part of the turntable for pre-pressing or pressing the rotary joint housing (7); the self-aligning component (4) is installed on the outer side of the upper part of the turntable (1) and can apply radial top pressure to the rotary joint housing (7) to adjust its concentricity; the measuring component (5) is installed at the center of the turntable (1) for measuring and monitoring the circumferential runout changes of the rotary joint coupling ring (8) and the rotary joint housing (7).

[0007] Furthermore, the turntable (1) includes a base (11), a bearing (12), an upper turntable (13), and guide blocks (15). The upper turntable (13) is mounted above the base (11) via the bearing (12). Several guide blocks (15) are evenly arranged on the circumference of the side of the upper turntable (13) for the installation and guidance of the self-aligning assembly (4). The upper turntable (13) is connected to the base (11) via the bearing (12) and can rotate relative to the base (11) around the turntable axis. The base (11) has a measuring assembly mounting hole (111) at its center for the installation and fixing of the measuring assembly (5). The upper turntable (13) has a measuring component channel hole 1 (132) at its center, which is used as a channel for the measuring component (5) to enter and exit the device; the measuring component channel hole 1 (132) has a centering component connection hole (131) at its upper part, which is used for positioning and connecting the centering component (2); the upper turntable (13) has multiple circumferentially distributed clamping component mounting slots (133) at its upper part, which are used for clamping component (3) to be installed. The clamping component (3) can slide radially along the clamping component mounting slot 133 and be fixed in a suitable position according to the size of the rotating joint.

[0008] Furthermore, it also includes a locking device (14), which is installed on the side of the base (11) and the upper turntable (13). When the upper turntable (13) is rotated to the appropriate position and needs to be fixed, pressing the locking switch of the locking device (14) can lock the upper turntable (13), and vice versa, it can be unlocked.

[0009] Further, the centering assembly (2) includes a centering shaft (21), an elastic sleeve (22), a retaining ring (23), a conical expansion core (24), and a screw (25); the positioning shaft (21) has an upper journal (211) and a lower journal (212) at its upper and lower ends, respectively, and a measuring component channel hole (213) is provided in the center, which serves as a channel for the measuring component (5) to enter and exit the device; the elastic sleeve (22) is installed on the positioning shaft (21) through the upper journal (211), and is concentric and fixed with the positioning shaft (21); the retaining ring (23) is installed inside the elastic sleeve (22), and is concentric with the elastic sleeve (22). The conical expansion core (24) is installed between the elastic sleeve (22) and the retaining ring (23), and the retaining ring (23) ensures that it is always concentric with the centering component (2); the upper end of the conical expansion core (24) is provided with multiple circumferentially distributed screw holes (241), and the screw (25) connects the conical expansion core (24) and the elastic sleeve (22) through the screw holes (241), and the upper and lower relative positions of the conical expansion core (24) and the elastic sleeve (22) can be adjusted and controlled by the thread engagement length, so that the elastic sleeve (22) expands or contracts under the action of the conical surface (242) of the conical expansion core; the elastic sleeve (22) is used to position and fix the rotating joint coupling ring (8).

[0010] Furthermore, the self-aligning assembly (4) includes an outer turntable (41), a connecting block (42), a lifting column (43), an adjusting screw (44), a protective head (45), and a set screw (46); the outer turntable (41) is annular and includes an inner hole (411), on which an annular groove (412) is formed; the connecting block (42) is installed on the side of the outer turntable (41), and the connecting block (42) has a guide hole (421) that runs vertically through it; the lifting column (43) is installed in the guide hole (421) and can move within the guide hole (421). Sliding up and down; the adjusting screw (44) is installed in the screw hole of the lifting column (43), with the front end of the adjusting screw (44) pointing to the center. Rotating the adjusting screw (44) allows it to move radially within the screw hole of the lifting column (43); the protective head (45) is installed at the front end of the adjusting screw (44); the set screw (46) is installed on the side of the connecting block (42); the adjusting screw (44) is used to apply radial adjustment pressure to the rotary joint housing (7), and the protective head (45) is used to protect the surface of the rotary joint housing (7) when the adjusting screw (44) applies adjustment pressure.

[0011] Furthermore, the self-aligning assembly (4) is installed on the outer cylindrical surface of the upper turntable (13) through the inner hole (411) of the outer turntable (41), and the upper and lower positions of the self-aligning assembly (4) are limited by the annular groove (412) and the guide block (15), so that the self-aligning assembly (4) can rotate around the circumference of the upper turntable (13) at the upper and lower limited positions.

[0012] Furthermore, the measuring assembly (5) includes a measuring center rod (51), an expansion cylinder (52), a lower cone block (53), an upper cone block (54), a nut sleeve (55), a universal joint holder (56), a dial indicator A (57), and a dial indicator B (58); the measuring center rod (51) is provided with an elastic chuck (511) and threads on its upper part, and a screw part (512) on its lower part, the screw part (512) being fitted with the expansion cylinder (52), the lower cone block (53), and the upper cone block (54). Nut sleeve (55) is installed on the upper elastic chuck (511) of the measuring center rod (51). Nut sleeve (55) controls the tightening and opening of elastic chuck (511) through threaded connection and conical surface fit, which plays the role of clamping and releasing universal table frame (56); Dial indicator A (57) and dial indicator B (58) are installed on universal table frame (56) to measure and monitor the concentricity of the outer cylindrical surface of the rotary joint coupling ring (8) and the inner cylindrical surface of the rotary joint shell (7).

[0013] Furthermore, the measuring component (5) is fixed in the measuring component mounting hole (111) of the turntable (1) by the measuring center rod (51), the lower cone block (53), the upper cone block (54) and the expansion cylinder (52).

[0014] Furthermore, the measuring center rod (51) is provided with a shoulder (513) at the lower part, and the expansion cylinder (52) has two sets of opposing inverted conical surfaces (521) inside. The lower cone block (53) has a screw hole at the center and a conical surface (531) at the top. The upper cone block (54) has a through hole at the center and a conical surface (541) at the bottom. The upper cone block (54) is sleeved outside the screw rod (512), and its top surface is in contact with the shoulder (513) of the screw rod. The lower cone block (53) is screwed into the screw rod (512) by threads. The expansion cylinder (52) is installed outside the lower cone block (53) and the upper cone block (54) by the upper and lower inner conical surfaces (521) being in contact with the conical surfaces (541) and (531) respectively.

[0015] Further, the measuring center rod (51) is rotated, and the screw part (512) and the lower cone block (53) rotate relative to each other, so that the lower cone block (53) moves up and down along the screw part (512); the lower cone block (53) moves up along the screw part (512), and the expansion cylinder (52) is expanded under the extrusion of the cone surface, so that the expansion cylinder (52) is tightened in the measuring component mounting hole (111) of the base (11). Conversely, the lower cone block (53) moves down along the screw part (512), and the expansion cylinder (52) contracts under its elastic action, and the fit between the expansion cylinder (52) and the measuring component mounting hole (111) loosens, so that the measuring component (5) can be taken out from the turntable (1).

[0016] The beneficial effects of this invention are as follows:

[0017] 1. It has built-in measurement and adjustment functions, which can easily measure the concentricity deviation between the rotary joint coupling ring and the outer shell, and quickly and accurately adjust the rotary joint. It can monitor the changing trend and amount of the rotary joint in real time during the adjustment process. At the same time, the device has the function of correcting the roundness and strengthening the rigidity of the coupling ring, so the assembly accuracy is high and the efficiency is high.

[0018] 2. The precise assembly of the rotary joint can be completed independently by the assembly fitter alone, without the need for other auxiliary equipment or equipment operators, thus saving production resources and reducing costs.

[0019] 3. It can be applied to rotary joints of various specifications. Only the centering component needs to be replaced to meet the assembly requirements of rotary joints of different specifications, thus it has good versatility. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the turntable structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the centering component structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the self-aligning component structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the measurement component structure of the present invention;

[0025] Figure 6 This is a schematic diagram of a partial lower structure of the measuring component of the present invention.

[0026] Among them, 1-turntable; 11-base; 111-measuring component mounting hole; 12-bearing; 13-upper turntable; 131-centering component connecting hole; 132-measuring component channel hole one; 133-clamping component mounting slot; 14-locking device; 15-guide block; 2-centering component; 21-centering shaft; 211-upper journal; 212-lower journal; 213-measuring component channel hole two; 22-elastic sleeve; 23-retaining ring; 24-conical expansion core; 241-screw hole; 242-conical expansion core cone surface; 25-screw; 3-clamping component; 4-centering component; 41-outer turntable; 411-Inner hole; 412-Annular groove; 42-Connecting block; 421-Guide hole; 43-Lifting column; 44-Adjusting screw; 45-Protective head; 46-Set screw; 5-Measuring assembly; 51-Measuring center rod; 511-Elastic chuck; 512-Screw section; 513-Shoulder; 52-Expansion cylinder; 521-Inner conical surface of expansion cylinder; 53-Lower conical block; 531-Conical surface of lower conical block; 54-Upper conical block; 541-Conical surface of upper conical block; 55-Nut sleeve; 56-Universal indicator holder; 57-Dial indicator A; 58-Dial indicator B; 7-Rotary joint housing; 8-Rotary joint coupling ring. Detailed Implementation

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] It should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "positioning," "installation," "fixing," "connection," and "joining" should be interpreted broadly. For example, "joining" can mean a fixed connection, a detachable connection, or an integral connection; it can mean a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] In the description of this invention, unless otherwise stated, "a plurality of" or "several" means two or more; the terms "center," "upper," "lower," "inner," "outer," "side," "inside," "upper part," "lower part," "front end," "rear end," "head," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0030] Furthermore, the dial indicator selected in the embodiments of the present invention is not limited to this; other measuring tools, such as micrometers, can also be used. In the embodiments of the present invention, the clamping component can be a commonly used clamping device, such as a combination of hook screws, a combination of pressure plates, or other clamping devices. In the embodiments of the present invention, the universal dial indicator frame can be a general-purpose dial indicator frame or a self-made special dial indicator frame.

[0031] like Figure 1 As shown, the rotary joint assembly concentricity measurement and adjustment device of the present invention includes a turntable 1, a centering assembly 2, a clamping assembly 3, a self-aligning assembly 4, and a measuring assembly 5. The turntable 1 is the foundation of the entire device; its lower part is fixed, while its upper part can rotate around an axis. The centering assembly 2 is installed on the upper part of the turntable 1 and is used to position and fix the rotary joint coupling ring 8. The clamping assembly 3 is evenly arranged circumferentially on the upper part of the turntable and is used to pre-press or tighten the rotary joint housing 7. The self-aligning assembly 4 is installed on the outer side of the upper part of the turntable and can be manually rotated to any circumferential position, applying radial top pressure to the rotary joint housing 7 to adjust its concentricity. The measuring assembly 5 is installed at the center of the turntable 1 and is used to measure and monitor the circumferential runout changes of the rotary joint coupling ring 8 and the rotary joint housing 7.

[0032] like Figure 2 As shown, the turntable 1 includes a base 11, a bearing 12, an upper turntable 13, a locking device 14, and guide blocks 15. The upper turntable 13 is mounted above the base 11 via the bearing 12. The locking device 14 is mounted on the sides of the base 11 and the upper turntable 13. Several guide blocks 15 are also evenly distributed around the sides of the upper turntable 13. The guide blocks 15 are used for the installation and guidance of the self-aligning assembly 4. The base 11 serves as the foundation of the device and remains stationary. The upper turntable 13 is connected to the base 11 via the bearing 12 and can rotate freely around the center of the turntable relative to the base 11. When the upper turntable 13 needs to be fixed at an appropriate position, pressing the locking switch of the locking device 14 locks the upper turntable 13; conversely, it releases the lock. The base 11 has a measuring component mounting hole 111 at its center for mounting and fixing the measuring component 5; the upper turntable 13 has a measuring component channel hole 132 at its center for the measuring component 5 to enter and exit the device; the measuring component channel hole 132 has a centering component connection hole 131 at its upper part for positioning and connecting the centering component 2; the upper turntable 13 has multiple circumferentially distributed clamping component mounting slots 133 at its upper part for clamping component 3 for mounting, and the clamping component 3 can slide radially along the clamping component mounting slots 133 and can be fixed in a suitable position according to the size of the rotating joint.

[0033] like Figure 3As shown, the centering assembly 2 includes a centering shaft 21, an elastic sleeve 22, a retaining ring 23, a conical expansion core 24, and a screw 25. The positioning shaft 21 has an upper journal 211 and a lower journal 212 at its upper and lower ends, respectively, and a measuring component channel hole 213 at its center. The measuring component channel hole 213 serves as a channel for the measuring component 5 to enter and exit the device. The elastic sleeve 22 is installed on the positioning shaft 21 through the upper journal 211, and is concentric and fixed with the positioning shaft 21. The retaining ring 23 is installed inside the elastic sleeve 22, and is concentric and fixed with the elastic sleeve 22. The conical expansion core 24 is installed between the elastic sleeve 22 and the retaining ring 23, and the retaining ring 23 ensures that it is always concentric with the positioning device 2. The upper end of the conical expansion core 24 is provided with multiple circumferentially distributed screw holes 241. The screw 25 connects the conical expansion core 24 and the elastic sleeve 22 through the screw holes 241, and the upper and lower relative positions of the conical expansion core 24 and the elastic sleeve 22 can be adjusted and controlled by the thread engagement length, so that the elastic sleeve 22 expands or contracts under the action of the conical surface 242 of the conical expansion core. The elastic sleeve 22 is used to position and fix the rotary joint coupling ring 8, and also serves to correct the roundness of the coupling ring 8.

[0034] like Figure 4 As shown, the self-aligning assembly 4 includes an outer turntable 41, a connecting block 42, a lifting column 43, an adjusting screw 44, a protective head 45, and a set screw 46. The outer turntable 41 is annular, with an annular groove 412 formed in its inner hole 411; the connecting block 42 is installed on the side of the outer turntable 41, and has a guide hole 421 that extends vertically; the lifting column 43 is installed in the guide hole 421 and can slide up and down within the guide hole 421; the adjusting screw 44 is installed in the screw hole of the lifting column 43, with the front end of the adjusting screw 44 pointing towards the center, and rotating the adjusting screw 44 allows it to move radially within the screw hole of the lifting column 43; the protective head 45 is installed at the front end of the adjusting screw 44; and the set screw 46 is installed on the side of the connecting block 42. The adjusting screw 44 is used to apply radial adjustment pressure to the rotary joint housing 7, and the protective head 45 is used to protect the surface of the rotary joint housing 7 when the adjusting screw 44 applies adjustment pressure. For rotary joints of different sizes, the lifting column 43 can be slid to different height positions, and locked at a suitable height position by the set screw 46. The entire self-aligning assembly 4 is mounted on the outer cylindrical surface of the upper turntable 13 through the inner hole 411 of the outer turntable 41, and the vertical position of the self-aligning assembly 4 is limited by the annular groove 412 and the guide block 15, so that the self-aligning assembly 4 can rotate around the circumference of the upper turntable 13 at the vertically limited position.

[0035] like Figure 5As shown, the measuring assembly 5 includes a measuring center rod 51, an expansion cylinder 52, a lower cone block 53, an upper cone block 54, a nut sleeve 55, a universal joint frame 56, a dial indicator A 57, and a dial indicator B 58. The measuring center rod 51 has an elastic chuck 511 and threads at its upper part, and a screw section 512 at its lower part. The screw section 512 is fitted with the expansion cylinder 52, the lower cone block 53, and the upper cone block 54. The nut sleeve 55 is installed outside the elastic chuck 511 on the upper part of the measuring center rod 51. The nut sleeve 55 controls the tightening and opening of the elastic chuck 511 through threaded connection and conical surface engagement, thus clamping and releasing the universal joint frame 56. The dial indicators A 57 and B 58 are installed on the universal joint frame 56 and are used to measure and monitor the concentricity of the outer cylindrical surface of the rotary joint coupling ring 8 and the inner cylindrical surface of the rotary joint housing 7. The measuring component 5 is fixed in the measuring component mounting hole 111 of the turntable 1 by the measuring center rod 51, the lower cone block 53, the upper cone block 54 and the expansion cylinder 52.

[0036] like Figure 6 As shown, the measuring center rod 51 also has a shoulder 513 at its lower part; the expansion cylinder 52 has two sets of opposing inward conical surfaces 521 inside; the lower cone block 53 has a screw hole at its center and a cone surface 531 at its upper part; the upper cone block 54 has a through hole at its center and a cone surface 541 at its lower part. The upper cone block 54 is fitted outside the screw rod part 512, and its top surface fits against the shoulder 513 of the screw rod part. The lower cone block 53 is screwed into the screw rod part 512. The expansion cylinder 52 is installed outside the lower cone block 53 and the upper cone block 54 through the upper and lower inner cone surfaces 521 fitting against the cone surfaces 541 and 531 respectively. Rotating the center rod 51 causes the screw rod part 512 and the lower cone block 53 to rotate relative to each other, allowing the lower cone block 53 to move up and down along the screw rod part 512. When the lower cone block 53 moves upward along the screw portion 512, the expansion cylinder 52 expands under the pressure of the cone surface, causing the expansion cylinder 52 to tighten in the measuring component mounting hole 111 of the base 11, thus fixing the measuring component 5 to the base 11. Conversely, when the lower cone block 53 moves downward along the screw portion 512, the expansion cylinder 52 contracts under its elastic action, and the fit between the expansion cylinder 52 and the measuring component mounting hole 111 loosens, allowing the measuring component 5 to be removed from the turntable 1.

[0037] The working process of the device of the present invention is as follows: First, place the turntable 1 on the workbench, place the rotary joint housing 7 on the upper plane of the upper turntable 13, and adjust the clamping assembly 3 to the appropriate position to fix the rotary joint housing 7; then, install the centering assembly 2 on the upper turntable 13, and insert the rotary joint coupling ring 8 into the rotary joint housing 7 by fitting it onto the outer wall of the elastic sleeve 22, and adjust the screw 25 on the centering assembly 2 to expand the elastic sleeve 22, thereby tightening the rotary joint coupling ring 8; then, insert the measuring assembly 5 into the measuring assembly mounting hole 111 of the base 11, and rotate the center rod 51 to expand the expansion cylinder 52 and fix it to the base 11; then, adjust the positions of the dial indicators A57 and B58, press the locking device 14 to release the lock of the upper turntable 13, rotate the upper turntable 13, and measure the rotary joint coupling ring 8 and the rotary joint housing 7 using the dial indicators. Find the point of maximum concentricity deviation of the outer shell 7 and calculate the pre-adjustment amount. Then, press the locking device 14 to lock the upper turntable 13, reduce the clamping force of the clamping assembly 3, rotate the self-aligning assembly to the point of maximum deviation, and adjust the position of the rotary joint outer shell 7 by adjusting the top pressure of the screw 44. Observe the dial indicator reading during the adjustment process to control the adjustment amount. After adjusting to the pre-adjustment amount, tighten the clamping assembly 3 to re-clamp the rotary joint outer shell 7, press the locking device 14 to release the lock of the upper turntable 13, rotate the upper turntable 13, and re-measure with the dial indicator to find the new position of maximum deviation. Then, adjust according to the above adjustment steps, repeating the measurement and adjustment multiple times until the required assembly accuracy is achieved. Finally, tighten the clamping assembly 3 to clamp the rotary joint outer shell 7, completing the subsequent connection of the rotary joint outer shell 7 and the rotary joint coupling ring 8 and the assembly of its accessories.

[0038] This invention is not limited to the specific embodiments described above, and various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made to the above embodiments based on the technical essence of this invention should be included within the scope of protection of this invention.

Claims

1. A rotary joint assembly concentricity measuring adjustment device characterized by: The rotary table (1), the centering assembly (2), the clamping assembly (3), the aligning assembly (4), the measuring assembly (5), the rotary joint shell (7) and the rotary joint coupling ring (8) are included; wherein the rotary table (1) includes two upper and lower parts, the lower part is fixed, and the upper part can rotate around the axis; the centering assembly (2) is installed on the upper part of the rotary table (1), used for positioning and fixing the rotary joint coupling ring (8); the clamping assembly (3) is uniformly arranged on the upper part of the rotary table, used for pre-pressing or pressing the rotary joint shell (7); the aligning assembly (4) is installed on the outside of the upper part of the rotary table (1), which can exert radial pressing force on the rotary joint shell (7) to realize the adjustment of the concentricity of the rotary joint shell (7); the measuring assembly (5) is installed at the center of the rotary table (1), used for measuring and monitoring the circumferential runout change of the rotary joint coupling ring (8) and the rotary joint shell (7).

2. A concentricity measuring adjustment device for a rotary joint assembly according to claim 1, characterized in that: The rotary table (1) includes a base (11), a bearing (12), an upper rotary table (13) and a guide block (15), the upper rotary table (13) is installed above the base (11) through the bearing (12), the upper rotary table (13) is uniformly provided with a plurality of guide blocks (15) on the side surface, used for the installation and guidance of the aligning assembly (4), the upper rotary table (13) is connected with the base (11) through the bearing (12) and can rotate relative to the base (11) around the rotary table axis; the base (11) is provided with a measuring assembly installation hole (111) at the center, used for the installation and fixation of the measuring assembly (5); the upper rotary table (13) is provided with a measuring assembly passage hole (132) at the center, used as a passage for the measuring assembly (5) to enter and exit; the upper rotary table (13) is provided with a centering assembly connecting hole (131) at the upper part, used for the positioning and connection of the centering assembly (2); the upper rotary table (13) is provided with a plurality of circumferentially distributed clamping assembly installation grooves (133) at the upper part, the clamping assembly installation grooves (133) are used for the installation of the clamping assembly (3), the clamping assembly (3) can slide radially along the clamping assembly installation grooves, and the appropriate position is selected according to the size of the rotary joint for fixation.

3. A concentricity measuring adjustment device for a rotary joint assembly according to claim 2, characterized in that: The locking device (14) is also included, which is installed on the side surface of the base (11) and the upper rotary table (13), when the upper rotary table (13) needs to be fixed after being turned to the appropriate position, the upper rotary table (13) can be locked by pressing the locking device (14) locking switch, and vice versa.

4. The concentricity measuring adjustment device for rotary joint assembly according to claim 1, characterized in that: The centering assembly (2) comprises a centering shaft (21), an elastic sleeve (22), a retaining ring (23), a conical expansion core (24) and a screw (25). The upper and lower ends of the centering shaft (21) are respectively provided with an upper shaft neck (211) and a lower shaft neck (212), and a center is provided with a measuring assembly passage hole two (213) which is used as a passage for the measuring assembly (5) in and out device. The elastic sleeve (22) is installed on the centering shaft (21) through the upper shaft neck (211) and keeps concentric and fixed with the centering shaft (21). The retaining ring (23) is installed inside the elastic sleeve (22) and keeps concentric and fixed with the elastic sleeve (22). The conical expansion core (24) is installed between the elastic sleeve (22) and the retaining ring (23) and is always kept concentric with the centering assembly (2) by the retaining ring (23). The upper end of the conical expansion core (24) is provided with a plurality of circumferentially distributed screw holes (241). The screw (25) connects the conical expansion core (24) and the elastic sleeve (22) through the screw holes (241) and can adjust and control the relative position of the conical expansion core (24) and the elastic sleeve (22) by the length of the screw thread rotation, so that the elastic sleeve (22) expands or shrinks under the action of the conical expansion core (242). The elastic sleeve (22) is used for positioning and fixing the rotary joint coupling ring (8).

5. The concentricity measuring adjustment device for rotary joint assembly according to claim 1, characterized in that: The centering assembly (4) comprises an outer rotating disc (41), a connecting block (42), a lifting column (43), an adjusting screw (44), a protective head (45) and a tight screw (46). The outer rotating disc (41) is a circular ring and comprises an inner hole (411) in which a ring groove (412) is formed. The connecting block (42) is installed on the side surface of the outer rotating disc (41) and is provided with a guide hole (421) penetrating through the upper and lower portions. The lifting column (43) is installed in the guide hole (421) and can slide up and down in the guide hole (421). The adjusting screw (44) is installed in the screw hole of the lifting column (43). The front end of the adjusting screw (44) points to the center of the circle. The rotating of the adjusting screw (44) can make it move radially in the screw hole of the lifting column (43). The protective head (45) is installed on the front end of the adjusting screw (44). The tight screw (46) is installed on the side surface of the connecting block (42). The adjusting screw (44) is used for applying radial adjusting pressure to the rotary joint shell (7). The protective head (45) is used for protecting the surface of the rotary joint shell (7) when the adjusting screw (44) applies adjusting pressure.

6. A concentric measuring adjustment device for a rotary joint assembly according to claim 5, characterized in that: The centering assembly (4) is installed on the outer cylindrical surface of the upper rotating table (13) through the inner hole (411) of the outer rotating disc (41) and the upper and lower positions of the centering assembly (4) are limited by the ring groove (412) and the guide block (15), so that the centering assembly (4) can rotate around the upper rotating table (13) at the circumferentially limited positions.

7. The concentricity measuring adjustment device for rotary joint assembly according to claim 1, characterized in that: The measuring assembly (5) comprises a measuring center rod (51), an expansion cylinder (52), a lower taper block (53), an upper taper block (54), a nut sleeve (55), a universal table stand (56), a dial gauge A (57) and a dial gauge B (58); the upper part of the measuring center rod (51) is provided with an elastic chuck (511) and a thread, and the lower part is provided with a screw rod part (512), and the screw rod part (512) is installed with the expansion cylinder (52), the lower taper block (53) and the upper taper block (54); the nut sleeve (55) is installed outside the elastic chuck (511) at the upper part of the measuring center rod (51), and the nut sleeve (55) controls the tightening and opening of the elastic chuck (511) through thread connection and taper surface cooperation, and plays a role of clamping and releasing the universal table stand (56); the dial gauge A (57) and the dial gauge B (58) are installed on the universal table stand (56), and are used for measuring and monitoring the concentricity of the outer cylindrical surface of the rotary joint coupling ring (8) and the inner cylindrical surface of the rotary joint shell (7).

8. A concentric measuring adjustment device for a rotary joint assembly according to claim 7, characterized in that: The measuring assembly (5) is fixed in the measuring assembly mounting hole (111) of the rotary table (1) through the measuring center rod (51), the lower taper block (53), the upper taper block (54) and the expansion cylinder (52).

9. A concentricity measuring adjustment device for a rotary joint assembly according to claim 7, characterized in that: The lower part of the measuring center rod (51) is further provided with a shaft shoulder (513), the inside of the expansion cylinder (52) is provided with two sets of opposite inner inverted taper surfaces (521) upward and downward, the center of the lower taper block (53) is a threaded hole, the upper part is provided with a taper surface (531), the center of the upper taper block (54) is a through hole, and the lower part is provided with a taper surface (541); the upper taper block (54) is sleeved outside the screw rod part (512), the top surface thereof is attached to the shaft shoulder (513) of the screw rod part, the lower taper block (53) is screwed with the screw rod part (512) through threads, and the expansion cylinder (52) is installed outside the lower taper block (53) and the upper taper block (54) by being attached to the taper surface (541) and the taper surface (531) upward and downward.

10. A concentricity measuring adjustment device for a rotary joint assembly according to claim 9, characterized in that: The measuring center rod (51) is rotated, the screw rod part (512) is relatively rotated with the lower taper block (53), and the lower taper block (53) moves up and down along the screw rod part (512); when the lower taper block (53) moves up along the screw rod part (512), the expansion cylinder (52) is expanded under the extrusion of the taper surface, the expansion cylinder (52) is tightened in the measuring assembly mounting hole (111) of the base (11), on the contrary, when the lower taper block (53) moves down along the screw rod part (512), the expansion cylinder (52) is contracted under the elastic action, the expansion cylinder (52) is relaxed in cooperation with the measuring assembly mounting hole (111), and the measuring assembly (5) is taken out from the rotary table (1).

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