A centrifugal pump rotor curved surface profile detection device and method

Abstract

This invention discloses a device and method for detecting the surface profile of a centrifugal pump rotor, relating to the field of centrifugal pump rotor surface profile detection technology. The device includes a main body comprising a worktable with multiple through holes on its top wall. Each through hole houses a clamping mechanism, which includes a rotating disk rotatably disposed within the through hole. The rotating disk has a recessed first mounting groove on its top wall, and a driving component is detachably mounted in the first mounting groove. An alignment component, comprising a cylinder, is slidably mounted at the axis of the first mounting groove and the driving component. By synchronously driving the multiple clamping blocks radially, the drive component automatically aligns the centrifugal pump rotor's shaft with the preset reference axis of the detection device. This mechanical automatic alignment and clamping during the installation of the centrifugal pump rotor's shaft is faster, more consistent, and more accurate than traditional manual alignment, reducing errors caused by human intervention.

Description

Technical Field

[0001] This invention relates to the field of centrifugal pump rotor surface profile detection technology, and more specifically, to a centrifugal pump rotor surface profile detection device and method. Background Technology

[0002] Centrifugal pumps are indispensable fluid transport equipment in key industrial sectors such as energy, chemical, water conservancy, and water supply. Their core working component, the impeller, converts mechanical energy into the kinetic and pressure energy of the fluid through rotation. The impeller profile, that is, the curved geometric contour of the blades in space, is the essence of its design. This contour controls the flow channel shape, fluid velocity, and pressure distribution, thus determining the pump's head, efficiency, cavitation performance, and operational stability. Therefore, precise inspection of the impeller's curved contour during manufacturing is an indispensable step in ensuring its final performance.

[0003] Traditional contour measurement methods mainly rely on two approaches: one is manual contact measurement using dial indicators or special calipers, which is inefficient, prone to human error, and the probe is easily worn or scratched on the surface of precision workpieces; the other is fixing the rotor on an independent station and sampling discrete points by a single-point or line laser sensor, which is prone to loss of measurement reference during repeated disassembly and clamping of workpieces, resulting in inconsistent data references and increasing the difficulty of subsequent processing. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a device and method for detecting the profile of a centrifugal pump rotor surface.

[0005] The technical solution is as follows:

[0006] A centrifugal pump rotor surface profile detection device includes a detection device body, the detection device body includes a worktable, a plurality of through holes are opened on the top wall of the worktable, a clamping mechanism is installed in each through hole, the clamping mechanism includes a rotating disk rotatably disposed in the through hole, a first mounting groove is opened inwardly on the top wall of the rotating disk, a driving component is detachably installed in the first mounting groove, and an alignment component is slidably installed at the axis of the first mounting groove and the driving component.

[0007] The centering component includes a cylinder with an insertion cavity at the top for the centrifugal pump rotor to be inserted. Multiple through slots communicating with the insertion cavity are provided on the outer wall of the cylinder. Clamping blocks for cooperating with the drive component are slidably installed in each through slot. The drive component is used to synchronously drive the clamping blocks to cooperate with the outer wall of the centrifugal pump rotor to form automatic centering.

[0008] Furthermore, the bottom wall of the rotating disk extends downward to form an extension that mates with the through hole. The extension has a second mounting groove that communicates with the first mounting groove. The centering assembly also includes a protrusion and a slider respectively located at the top and bottom of the cylinder. The bottom of the protrusion has a downward-extending second extension tube, and the top of the slider has an upward-extending first extension tube. A first spring is connected between the inner wall of the second extension tube and the clamping block, and between the first extension tube and the clamping block. The first spring is used to provide elastic force to keep the clamping block pressed towards the insertion cavity.

[0009] Furthermore, a coaxially mounted top cover is detachably installed at the top of the rotating disk. A circular hole is provided at the center of the top cover for the sliding installation of the protrusion. A sliding cavity is provided at the bottom wall of the top cover. A fixing ring is provided at the bottom of the outer wall of the second extension tube.

[0010] Furthermore, a second spring is connected between the bottom wall of the second mounting groove and the bottom wall of the slider. The second spring is used to provide the elastic force to press the slider upward.

[0011] Furthermore, the clamping block has a semi-circular portion on one side wall of the insertion cavity, and the top of the semi-circular portion has a guide surface that is inclined towards the through groove. The middle of the other side wall of the clamping block has an outwardly protruding part, and an inclined surface is formed between the bottom wall of the protruding part and the bottom wall of the clamping block. A through hole is opened at the center of the drive shaft, and a mating part that cooperates with the inclined surface is located on the inner wall of the through hole.

[0012] Furthermore, the slider has a downwardly extending slider at the axis of the bottom wall, and a locking assembly is installed at the bottom wall of the extension. The locking assembly includes a ratchet rack located at one end of the side wall through which the slider passes through the second mounting groove, and a mounting seat located at the bottom of the extension. A pawl that engages with the ratchet rack is rotatably mounted on the mounting seat. The pawl is used to limit the slider in one direction. A third spring is connected between the middle of the bottom wall of the pawl and the mounting seat. The third spring is used to provide elastic force to keep the pawl pressed against the ratchet rack. A drive rod is connected to the pawl.

[0013] Furthermore, a rotating assembly for driving the rotating disk is installed on the bottom wall of the worktable. The rotating assembly includes an external gear ring located on the outer wall of the extension and a motor located on the bottom wall of the worktable. A gear that meshes with the external gear ring is installed at the output end of the motor.

[0014] Furthermore, an annular groove coaxially arranged with the through hole is provided at the top of the workbench, and rollers that cooperate with the annular groove are installed on the bottom wall of the rotating disk.

[0015] Furthermore, a detection device corresponding to the clamping mechanism is installed at the top of the workbench. The detection device is used to measure the surface profile of the centrifugal pump rotor installed at the clamping mechanism.

[0016] A method for using a centrifugal pump rotor surface profile detection device includes the following steps:

[0017] S1. Insert the centrifugal pump rotor shaft into the insertion cavity. The clamping block achieves initial centering and clamping of the centrifugal pump rotor shaft through the action of the first spring.

[0018] S2. Continue to apply pressure to move the centrifugal pump rotor shaft downward, causing the centering assembly to move downward. At this time, the drive component drives the clamping block to move inward, performing secondary centering and clamping on the centrifugal pump rotor shaft.

[0019] S3. The locking component provides unidirectional limiting to the lowered centering component, thereby achieving final centering and clamping of the centrifugal pump rotor shaft.

[0020] S4. The rotating component drives the rotating disk to rotate, which in turn drives the centrifugal pump rotor at the centering component to rotate. The detection device detects the surface profile of the centrifugal pump rotor.

[0021] S5. After the test is completed, the pawl can be reset by driving the drive rod to disengage it from the limit of the ratchet tooth row.

[0022] As described above, the beneficial effects of the centrifugal pump rotor surface profile detection device and method of the present invention are as follows:

[0023] By using a drive unit to synchronously drive multiple clamping blocks to move radially, the centrifugal pump rotor shaft can be automatically aligned with the preset reference axis of the detection device. Through mechanical automatic alignment and clamping during the installation of the centrifugal pump rotor shaft, it is faster, more consistent, and more accurate than traditional manual alignment, reducing errors caused by human intervention.

[0024] Furthermore, the rotor can be aligned and fixed in a single clamping operation on the device, completely avoiding the problems of measurement benchmark loss and data misalignment caused by repeated disassembly and reassembly and changing workstations in traditional methods. This ensures that all test data are based on the same clamping benchmark, greatly simplifying the difficulty of subsequent data processing and analysis.

[0025] By designing the semi-circular portion, the clamping block makes only line contact with the outer wall of the centrifugal pump rotor shaft, reducing the contact area with the centrifugal pump rotor shaft and thus reducing wear on the outer wall of the centrifugal pump rotor shaft caused by the clamping block.

[0026] The centrifugal pump rotor is rotated by the extension with an external toothed ring driven by the motor. With the help of the detection device, the profile data of the centrifugal pump rotor at different angles can be continuously obtained. The complete surface profile data of the entire centrifugal pump rotor can be obtained without manual intervention or moving the centrifugal pump rotor. Attached Figure Description

[0027] Figure 1 This is a three-dimensional schematic diagram of the overall components of the present invention;

[0028] Figure 2 This is a side sectional view of the clamping mechanism of the present invention;

[0029] Figure 3 This is a front cross-sectional view of the clamping mechanism of the present invention;

[0030] Figure 4 For the present invention Figure 3 Enlarged schematic diagram of component A in the middle;

[0031] Figure 5 This is an exploded view of the clamping mechanism of the present invention;

[0032] Figure 6 This is a schematic cross-sectional view of the clamping mechanism of the present invention before explosion;

[0033] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of component at point B;

[0034] Figure 8 This is a schematic diagram of the clamping block of the present invention.

[0035] The reference numerals in the accompanying drawings of this invention are as follows:

[0036] 100. Detection device body; 110. Workbench; 120. Annular groove; 200. Clamping mechanism; 210. Rotary disk; 211. Roller; 212. First mounting groove; 213. Second mounting groove; 220. Top cover; 230. Centering assembly; 231. Cylinder; 2311. Insertion cavity; 2312. Through groove; 232. Clamping block; 2321. Semi-circular part; 2322. Guide surface; 2323. Protrusion; 2 324. Inclined surface; 233. Slider; 2331. First extension tube; 234. First spring; 235. Protrusion; 2351. Second extension tube; 236. Second spring; 240. Driving component; 241. Mating part; 300. Detection device; 400. Rotating assembly; 500. Locking assembly; 510. Ratchet; 520. Mounting base; 530. Pawl; 531. Driving rod; 540. Third spring. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] The embodiments provided by the present invention will be described in detail below:

[0039] like Figures 1 to 8 A centrifugal pump rotor surface profile detection device includes a detection device body 100, the detection device body 100 includes a worktable 110, the top wall of the worktable 110 is provided with multiple through holes, each through hole is equipped with a clamping mechanism 200, the clamping mechanism 200 includes a rotating disk 210 rotatably disposed in the through hole, the top wall of the rotating disk 210 is provided with an inwardly recessed first mounting groove 212, a driving component 240 is detachably mounted at the first mounting groove 212, and an alignment component 230 is slidably mounted at the axis of the first mounting groove 212 and the driving component 240.

[0040] The centering assembly 230 includes a cylindrical body 231. The top of the cylindrical body 231 has an insertion cavity 2311 for inserting the centrifugal pump rotor. The outer wall of the cylindrical body 231 has multiple through slots 2312 that communicate with the insertion cavity 2311. The multiple through slots 2312 are arranged at equal intervals along the outer wall of the cylindrical body 231. Each through slot 2312 has a clamping block 232 that is slidably installed in it for cooperating with the drive component 240. The drive component 240 is used to synchronously drive the clamping block 232 to cooperate with the outer wall of the centrifugal pump rotor to form automatic centering.

[0041] The rotating disk 210 has an extension extending downward from its bottom wall to engage with the through hole. The extension has a second mounting groove 213 that communicates with the first mounting groove 212. The centering assembly 230 also includes a protrusion 235 and a slider 233 respectively located at the top and bottom of the cylinder 231. The bottom of the protrusion 235 has a downwardly extending second extension tube 2351, and the top of the slider 233 has an upwardly extending first extension tube 2331. A first spring 234 is connected between the inner wall of the second extension tube 2351 and the clamping block 232, and between the first extension tube 2331 and the clamping block 232. The first spring 234 is used to provide elastic force to keep the clamping block 232 pressed towards the insertion cavity 2311.

[0042] A top cover 220 is detachably mounted on the top of the rotating disk 210 and is coaxially arranged. A round hole is provided at the center of the top cover 220 for the sliding installation of the protrusion 235. A sliding cavity is provided at the bottom wall of the top cover 220. A fixing ring is provided at the bottom of the outer wall of the second extension tube 2351.

[0043] It should be noted that the retaining ring is used to limit the bottom of the first spring 234 to prevent the protrusion 235 from disengaging from the sliding cavity.

[0044] A second spring 236 is connected between the bottom wall of the second mounting groove 213 and the bottom wall of the slider 233. The second spring 236 is used to provide the upward pressing force of the slider 233.

[0045] It should be noted that the elastic force of the second spring 236 is greater than that of the first spring 234.

[0046] like Figure 8 As shown, the clamping block 232 has a semi-circular portion 2321 on one side wall of the insertion cavity 2311. The top of the semi-circular portion 2321 has a guide surface 2322 that is inclined towards the through groove 2312. The middle of the other side wall of the clamping block 232 has an outwardly protruding protrusion 2323. An inclined surface 2324 is formed between the bottom wall of the protrusion 2323 and the bottom wall of the clamping block 232. A through hole is opened at the axis of the driving member 240. The inner wall of the through hole has a mating portion 241 that cooperates with the inclined surface 2324.

[0047] It should be noted that by setting the semi-circular part 2321, the clamping block 232 only makes line contact with the outer wall of the centrifugal pump rotor shaft when it contacts the shaft, which reduces the contact area with the shaft of the centrifugal pump rotor and thus reduces the wear of the clamping block 232 on the outer wall of the centrifugal pump rotor shaft.

[0048] The guide surface 2322 provides guidance for the centrifugal pump rotor shaft, facilitating the insertion of the centrifugal pump rotor shaft into the insertion cavity 2311.

[0049] By setting the inclined surface 2324 and the mating part 241, the clamping block 232 can be driven to descend when the centering component 230 descends. Since the driving component 240 is fixed, when the clamping block 232 contacts the driving component 240, the driving component 240 will drive multiple clamping blocks 232 to move inward synchronously so as to fit against the outer wall of the centrifugal pump rotor shaft for preliminary automatic centering and clamping.

[0050] Understandably, by using the drive unit 240 to synchronously drive multiple clamping blocks 232 to move radially, the centrifugal pump rotor shaft can be automatically aligned with the preset reference shaft of the detection device 300. Through mechanical automatic centering and clamping during the installation of the centrifugal pump rotor shaft, it is faster, more consistent, and more accurate than traditional manual centering, reducing errors caused by human intervention.

[0051] Furthermore, the rotor can be aligned and fixed in a single clamping operation on the device, completely avoiding the problems of measurement benchmark loss and data misalignment caused by repeated disassembly and reassembly and changing workstations in traditional methods. This ensures that all test data are based on the same clamping benchmark, greatly simplifying the difficulty of subsequent data processing and analysis.

[0052] like Figures 2 to 7As shown, the slider 233 has a downwardly extending slider 233 at the bottom wall axis. A locking assembly 500 is installed at the bottom wall of the extension. The locking assembly 500 includes a ratchet 510 located at one end of the side wall of the slider 233 passing through the second mounting groove 213 and a mounting seat 520 located at the bottom of the extension. A pawl 530 that cooperates with the ratchet 510 is rotatably mounted at the mounting seat 520. The pawl 530 is used to form a one-way limit on the slider 233. A third spring 540 is connected between the middle of the bottom wall of the pawl 530 and the mounting seat 520. The third spring 540 is used to provide elastic force to keep the pawl 530 pressed against the ratchet 510. A drive rod 531 is connected to the pawl 530.

[0053] The ratchet 510 has a groove that engages with the pawl 530. The top wall of the groove has a guide surface. When the guide surface contacts the pawl 530, the pawl 530 rotates outward along the guide surface, causing the ratchet 510 on the extension to continue to move downward. When the ratchet 510 does not move downward, the pawl 530 will be engaged in the groove. Since the other wall of the groove is vertical, it forms a locking position on the pawl 530, preventing the ratchet 510 on the extension from moving upward.

[0054] It should be noted that by setting the locking component 500, the detection device 300 is automatically axially limited when the centrifugal pump rotor shaft is in the optimal clamping state, without the need for repeated manual adjustment, making the operation simple and fast.

[0055] like Figure 2 As shown, a rotating assembly 400 for driving the rotating disk 210 to rotate is installed on the bottom wall of the worktable 110. The rotating assembly 400 includes an external gear ring provided on the outer wall of the extension and a motor provided on the bottom wall of the worktable 110. A gear that cooperates with the external gear ring is installed at the output end of the motor.

[0056] It should be noted that by driving the extension with the external toothed ring to rotate by the motor, the centrifugal pump rotor on 350 is rotated. With the cooperation of the detection device 300, the contour data of the centrifugal pump rotor at different angles can be continuously obtained. Without manual intervention or moving the centrifugal pump rotor, the complete surface contour data of the entire centrifugal pump rotor can be obtained in 360 degrees.

[0057] like Figures 2 to 3 and Figure 5 As shown, an annular groove 120 coaxially arranged with the through hole is provided at the top of the workbench 110, and a roller 211 that cooperates with the annular groove 120 is installed on the bottom wall of the rotating disk 210.

[0058] It should be noted that the arrangement of the annular groove 120 and the roller 211 enables the rotating component 400 to drive the rotating disk 210 to rotate more stably and smoothly.

[0059] like Figures 1 to 3 and Figure 5 As shown, a detection device 300 corresponding to the clamping mechanism 200 is installed at the top of the workbench 110. The detection device 300 is used to measure the surface profile of the centrifugal pump rotor installed at the clamping mechanism 200.

[0060] It should be noted that the detection device 300 can measure the surface profile of centrifugal pump rotors of different heights, which is existing technology and will not be described in detail here.

[0061] A method for using a centrifugal pump rotor surface profile detection device, characterized by comprising the following steps:

[0062] S1. Insert the centrifugal pump rotor shaft into the insertion cavity 2311. The clamping block 232 achieves initial centering and clamping of the centrifugal pump rotor shaft through the action of the first spring 234.

[0063] S2. Continue to apply pressure to move the centrifugal pump rotor shaft downward, causing the centering assembly 230 to move downward. At this time, the driving component 240 drives the clamping block 232 to move inward, performing secondary centering and clamping on the centrifugal pump rotor shaft.

[0064] S3, the locking component 500 performs unidirectional limiting on the lowered centering component 230, forming the final centering and clamping of the centrifugal pump rotor shaft;

[0065] S4. The rotating component 400 drives the rotating disk 210 to rotate, which in turn drives the centrifugal pump rotor at the centering component 230 to rotate. The detection device 300 detects the surface profile of the centrifugal pump rotor.

[0066] S5. After the test is completed, the ratchet 530 can be reset by driving the drive rod 531 to disengage the ratchet rack 510.

[0067] By using the progressive clamping force of the clamping block 232, the driving component 240, the first spring 234, and the locking assembly 500, rigid impact or local overstress is avoided, effectively preventing scratches and clamping marks on the shaft of the precision rotor, thus achieving non-destructive testing. This method is simple to operate and easy to learn, requiring no special training.

[0068] It is readily understood that those skilled in the art can combine, split, or reorganize the embodiments provided in this application to obtain other embodiments, all of which do not exceed the protection scope of this application.

[0069] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the embodiments shown are only part of the embodiments of the present invention. The actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A centrifugal pump rotor camber profile measuring device, characterized by, The utility model provides a detection device, including detection device body (100), detection device body (100) includes workbench (110), a plurality of through -holes are seted up at the top wall of workbench (110), and the clamping mechanism (200) is installed in the through -hole, the clamping mechanism (200) includes the rotary disc (210) that rotates in the through -hole, the top wall of rotary disc (210) is seted up with the first installation groove (212) that recesses inwards, and the first installation groove (212) is detachably installed with the drive part (240) at first installation groove (212) and drive part (240) axial center place jointly slidingly installed with the centering subassembly (230), The centering subassembly (230) includes the cylinder (231), the top of cylinder (231) is seted up with the insertion cavity (2311) that the centrifugal pump rotor inserts, the outer wall of cylinder (231) is seted up with a plurality of through -groove (2312) that insertion cavity (2311) is communicated, and the through -groove (2312) is slidingly installed with the clamping block (232) for cooperating with drive part (240) in, The bottom wall of rotary disc (210) extends downwardly with the extension part that cooperates with the through -hole, and the extension part is seted up with the second installation groove (213) that is communicated with the first installation groove (212), and the centering subassembly (230) still includes the lug (235) and the sliding block (233) that are respectively arranged at the top and bottom of cylinder (231), the bottom of lug (235) has the second extension pipe portion (2351) that extends downwardly, the top of sliding block (233) has the first extension pipe portion (2331) that extends upwardly, and the first spring (234) is connected between the inner wall of second extension pipe portion (2351) and clamping block (232) and between the first extension pipe portion (2331) and clamping block (232), and the first spring (234) is used to provide the elastic force that keeps clamping block (232) and is pressed tightly in the direction of insertion cavity (2311), and clamping block (232) realizes the primary centering and clamping to the rotating shaft of centrifugal pump rotor through the action of first spring (234); The one side side wall of clamping block (232) in insertion cavity (2311) has semicircular part (2321), and the top of semicircular part (2321) has the guide surface (2322) that is inclined to the direction of through -groove (2312), and the middle part of the other side side wall of clamping block (232) has the convex part (2323) that protrudes outwardly, and the bottom wall and the bottom wall between convex part (2323) and clamping block (232) form the inclined surface (2324), and the axial center of drive part (240) is seted up with the through -hole, and the inner wall of through -hole has the matching part (241) that cooperates with inclined surface (2324), and drive part (240) drives a plurality of clamping blocks (232) to move inwards synchronously to be combined with the outer wall of the rotating shaft of centrifugal pump rotor, and carries out the secondary automatic centering and clamping.

2. A centrifugal pump rotor cam profile degree detection device according to claim 1, characterized in that, The top of rotary disc (210) is detachably installed with the top cover (220) that is coaxially arranged, the axial center of top cover (220) is seted up with the round hole that is used for the lug (235) sliding installation, and the bottom wall of top cover (220) is seted up with the sliding cavity, and the bottom of the outer wall of second extension pipe portion (2351) has the fixing ring.

3. A centrifugal pump rotor cam profile degree detection device according to claim 2, characterized in that, The second spring (236) is connected between the bottom wall of the second mounting groove (213) and the bottom wall of the sliding block (233), and is used to provide the elastic force for pressing the sliding block (233) upward.

4. A centrifugal pump rotor cam profile degree detection device according to claim 1, characterized in that, The sliding block (233) has a downward extension at the axial center of the bottom wall of the sliding block (233), and the extension is provided with a locking assembly (500) at the bottom wall of the extension. The locking assembly (500) comprises a ratchet row (510) arranged at one side wall of the sliding block (233) penetrating through the second mounting groove (213) and a mounting seat (520) arranged at the bottom of the extension. The mounting seat (520) is rotatably provided with a pawl (530) matched with the ratchet row (510). The pawl (530) is used to form one-way positioning of the sliding block (233). The third spring (540) is connected between the bottom wall of the pawl (530) and the mounting seat (520), and is used to provide the elastic force for pressing the pawl (530) toward the ratchet row (510). The pawl (530) is connected with a driving rod (531).

5. A centrifugal pump rotor cam profile degree detection device according to claim 1, characterized in that, The workbench (110) is provided with a rotating assembly (400) for driving the rotation of the rotating disc (210). The rotating assembly (400) comprises an outer gear ring arranged at the outer wall of the extension and a motor arranged at the bottom wall of the workbench (110). The output end of the motor is provided with a gear matched with the outer gear ring.

6. A centrifugal pump rotor cam profile degree detection device according to claim 1, characterized in that, The workbench (110) is provided with a ring groove (120) coaxially arranged with the through hole at the top of the workbench (110). The rotating disc (210) is provided with a roller (211) matched with the ring groove (120) at the bottom wall of the rotating disc (210).

7. A centrifugal pump rotor cam profile degree detection device according to claim 1, characterized in that, The workbench (110) is provided with a detection device (300) corresponding to the clamping mechanism (200) at the top of the workbench (110). The detection device (300) is used to measure the curved surface profile of the centrifugal pump rotor arranged on the clamping mechanism (200).

8. A method of using a device for measuring the profile of a centrifugal pump rotor according to any one of claims 1 to 7, characterized in that, The method comprises the following steps: S1, the rotating shaft of the centrifugal pump rotor is inserted into the insertion cavity (2311), and the clamping block (232) is used to preliminarily center and clamp the rotating shaft of the centrifugal pump rotor through the action of the first spring (234); S2, continue to press the rotating shaft of the centrifugal pump rotor downward to drive the centering assembly (230) to move downward. At this time, the driving part (240) drives the clamping block (232) to move inward to center and clamp the rotating shaft of the centrifugal pump rotor again; S3, the locking assembly (500) one-way positions the lowered centering assembly (230) to form the final centering and clamping of the rotating shaft of the centrifugal pump rotor; S4, the rotating assembly (400) works to drive the rotating disc (210) to rotate to drive the centrifugal pump rotor of the centering assembly (230) to rotate, and the detection device (300) detects the curved surface profile of the centrifugal pump rotor; S5, after the detection is completed, the pawl (530) is disengaged from the limitation of the ratchet row (510) by driving the driving rod (531) to reset.

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