An automatic correction device for dynamic balance of impeller

Abstract

The present invention discloses an automatic correction device for dynamic balance of an impeller, comprising a correction ring M arranged on an impeller shaft, wherein a counterweight device is evenly distributed circumferentially on the correction ring, wherein the counterweight device comprises a mounting base, which is evenly distributed circumferentially on the correction ring and comprises an internal thread groove and an external thread rod formed at the bottom of the internal thread groove; an external threaded connection member, comprising an external thread ring threaded in the internal thread groove and locking slots evenly distributed circumferentially on the inner wall of the external thread ring; an internal threaded connection member, comprising a cylindrical base and an internal thread hole formed below the cylindrical base and used for threading with the external thread rod, wherein the internal thread hole and the internal thread groove have opposite thread rotation directions; a locking assembly, comprising a pressing assembly formed in the cylindrical base, a central gear driven by the pressing assembly, external gears evenly distributed circumferentially on the outer periphery of the central gear and meshing with the central gear, and an output rack matched one-to-one with the external gear and transmission connected, wherein the output rack is plug-matched one-to-one with the locking slot.

Description

Technical Field

[0001] The present application relates to the field of mechanical technology, and in particular to an automatic correction device for dynamic balance of an impeller. Background Art

[0002] After the actual production and preparation of large impellers, dynamic balancing tests must be performed, using a dynamic balancing tester to simulate the working state of the impeller. For dynamic balancing correction, a feasible solution is to set an annular correction device on the impeller to achieve dynamic balancing by increasing or decreasing the mass. The existing solution to increase the mass is generally to screw a correction block on the screw hole. However, during the use of the impeller, the screwed correction block is easy to loosen or even fall off, so it is necessary to design an automatic correction device that can prevent falling off. Summary of the invention

[0003] An automatic correction device for dynamic balance of an impeller, comprising a correction ring M arranged on an impeller shaft, wherein a counterweight device is evenly distributed circumferentially on the correction ring, and the counterweight device comprises

[0004] The installation base is evenly distributed on the correction ring in the circumferential direction, and includes an internal thread groove and an external thread rod formed at the bottom of the internal thread groove;

[0005] The external threaded connection comprises an external threaded ring threaded in the internal threaded groove, and locking slots uniformly distributed circumferentially on the inner wall of the external threaded ring;

[0006] The internal threaded connection part comprises a cylindrical base and an internal threaded hole formed below the cylindrical base for threading with the external threaded rod, wherein the internal threaded hole and the internal thread groove have opposite thread rotation directions;

[0007] The locking assembly includes a pressing assembly formed in a cylindrical base, a central gear driven by the pressing assembly, an external gear evenly distributed on the outer circumference of the central gear and meshing with the central gear, and an output rack matched with the external gear one by one and connected in transmission, wherein the output rack is plugged into the locking slot one by one.

[0008] As a further implementation:

[0009] The pressing assembly comprises a pressing longitudinal hole formed on the top of the cylindrical base, a pressing longitudinal rod arranged in the pressing longitudinal hole, and a spiral jack formed on the outer wall of the pressing longitudinal rod;

[0010] The middle gear comprises a middle gear cavity formed outside the pressing longitudinal hole, a middle gear body rotatably arranged in the middle gear cavity, and a middle plug formed on the inner wall of the middle gear body and meshed with the spiral plug hole;

[0011] The external gear comprises external gear holes uniformly distributed in the circumferential direction below the middle gear cavity, lower receiving holes formed at the lower ends of the external gear holes, an external gear shaft rotatably arranged in the external gear hole, an upper small gear formed at the upper end of the external gear shaft and meshing with the middle gear body, and a lower large gear formed at the lower end of the external gear shaft;

[0012] The output rack corresponds to the external gear one by one, and includes a rack insertion hole connected to the lower receiving hole, and a rack body slidably arranged in the rack insertion hole and meshing with the lower large gear;

[0013] Further:

[0014] It also includes a maintaining component for maintaining the pressing component in a high position.

[0015] As a first implementation:

[0016] The maintaining component is a downward compression spring arranged in the pressing longitudinal hole and below the pressing longitudinal rod, and a rotation-stopping square rod arranged in the pressing longitudinal hole 41a and penetrating the pressing longitudinal rod.

[0017] As an implementation:

[0018] Also included is a buckle assembly, including a spring-loaded plug, a fixed locking tooth, and a movable locking tooth;

[0019] The spring-pressed plug includes a spring-pressed socket arranged on the side of the pressing longitudinal hole, a side slide formed on the side of the spring-pressed socket, a transverse compression spring arranged in the spring-pressed socket, a spring-pressed plug rod slidably arranged in the spring-pressed socket, a limit plug block formed on the side of the spring-pressed plug rod and plugged with the side slide, and a pressure inclined surface formed on the side of the spring-pressed plug rod and inclined from the upper right to the lower left;

[0020] The fixed lock teeth include a self-locking plug rod disposed below the spiral plug hole, a self-locking end formed at the lower end of the self-locking plug rod, and a fixed inclined surface formed at the lower end of the self-locking end head and inclined from the upper right to the lower left;

[0021] The movable lock tooth includes an movable lock cavity formed in the self-locking plug rod, a longitudinal core shaft formed in the movable lock cavity, a movable compression spring wound around the longitudinal core shaft, and a movable lock head slidably arranged on the longitudinal core shaft above the movable compression spring. The upper end of the movable lock head is provided with a reset inclined surface inclined from the upper left to the lower right, and the lower end of the movable lock head is formed with an movable inclined surface flush with the fixed inclined surface.

[0022] Based on the above implementation scheme, the maintaining component is a side-mounted compression spring that presses the left side of the longitudinal hole;

[0023] The side pressure spring includes a side pressure longitudinal cavity arranged on the left side of the pressing longitudinal hole, a side pressure core shaft formed in the side pressure longitudinal cavity, a pressure spring body wound around the side pressure core shaft, and a side pressure ring formed on the left side of the self-locking plug rod and sleeved on the side pressure core shaft.

[0024] Beneficial effects:

[0025] The present case describes an automatic correction device for the dynamic balance of an impeller, wherein the counterweight device can be screwed and fixed by an external screw connector and an internal screw connector, wherein the spiral directions of the external screw connector and the internal screw connector are opposite, and thus the counterweight device can realize a self-locking function in both positive and negative directions and will not loosen or fall off during long-term use.

[0026] The present case describes an automatic correction device for the dynamic balance of an impeller, wherein the buckle assembly can realize the functions of pressing to lock and re-pressing to unlock, thereby adjusting the telescopic state of the locking assembly:

[0027] When installing the internal threaded connector, the buckle assembly is pressed to lock, and the locking assembly retracts, thereby facilitating the rotation and installation of the internal threaded connector;

[0028] When the freedom of the internal threaded connection and the external threaded connection is locked, the locking assembly is unlocked by re-pressing, thereby locking the rotational freedom between the internal threaded connection and the external threaded connection.

[0029] The present case describes an automatic correction device for the dynamic balance of an impeller, wherein the external gear has an acceleration transmission effect, so that when the pressing component is pressed downward to drive the central gear to rotate a small angle, the external gear can drive the output rack to move a long distance, thereby realizing the extension and retraction of the locking component. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 Schematic diagram of an embodiment of the impeller.

[0032] Figure 2 yes Figure 1 Sectional view of section AA.

[0033] Figure 3 yes Figure 2 Part B is an enlarged schematic diagram of an embodiment.

[0034] Figure 4 yes Figure 3Part B is an enlarged schematic diagram of another embodiment.

[0035] Figure 5 yes Figure 4 Part B is an enlarged schematic diagram of another embodiment.

[0036] Figure 6 yes Figure 5 A cross-sectional view of an embodiment of the CC section.

[0037] Figure 7 is a schematic diagram of an embodiment of a pressing assembly.

[0038] Figure 8 is a schematic diagram of another embodiment of a pressing assembly.

[0039] Fig. 9 is a schematic diagram of another embodiment of a pressing component.

[0040] Fig.10 yes Fig. 9 The enlarged schematic diagram of the first embodiment is shown in section D.

[0041] Fig.11 yes Fig. 9 The enlarged schematic diagram of the second embodiment is shown in part D in the middle.

[0042] Fig.12 yes Fig. 9 The enlarged schematic diagram of the third embodiment in the middle D part

[0043] Fig.13 yes Fig. 9 The enlarged schematic diagram of the fourth embodiment is shown in part D in the middle.

[0044] In the figure:

[0045] M. Correction ring;

[0046] 1. Installation base, 11. Internal thread groove, 12. External thread rod;

[0047] 2. External threaded connector, 21. External threaded ring, 22. Locking slot;

[0048] 3. Internal threaded connection, 31. Cylindrical foundation, 32. Internal threaded hole;

[0049] 4. Locking assembly;

[0050] 41. Pressing assembly, 41a. Pressing longitudinal hole, 41b. Pressing longitudinal rod, 41c. Screw socket;

[0051] 42. Middle gear, 42a. Middle gear cavity, 42b. Middle gear body, 42c. Middle plug;

[0052] 43. External gear, 43a. External gear hole, 43b. Lower receiving hole, 43c. External gear shaft, 43d. Upper small gear, 43e. Lower large gear;

[0053] 44. output rack, 44a. rack jack, 44b. rack body;

[0054] 5. Maintaining assembly, 51. Lower compression spring, 51a. Anti-rotation square rod;

[0055] 52. Side compression spring, 52a. Side pressure longitudinal cavity, 52b. Side pressure mandrel, 52c. Compression spring body, 52d. Side pressure collar;

[0056] 6. Buckle assembly;

[0057] 61. spring-pressed plug, 61a. spring-pressed socket, 61b. side slide, 61c. horizontal compression spring, 61d. spring-pressed plug rod, 61e. limit plug block, 61f. pressure inclined surface;

[0058] 62. Fixed locking teeth, 62a. Self-locking plug rod, 62b. Self-locking end, 62c. Fixed bevel;

[0059] 63. Movable lock tooth, 63a. Movable lock cavity, 63b. Longitudinal mandrel, 63c. Movable compression spring, 63d. Movable lock head, 63e. Reset slope, 63f. Movable slope. DETAILED DESCRIPTION

[0060] An automatic correction device for dynamic balance of an impeller, comprising a correction ring M arranged on an impeller shaft, wherein a counterweight device is evenly distributed circumferentially on the correction ring, and the counterweight device comprises

[0061] The installation base 1 is evenly distributed on the correction ring M in the circumferential direction, and includes an internal thread groove 11 and an external thread rod 12 formed at the bottom of the internal thread groove 11;

[0062] The external threaded connection member 2 comprises an external threaded ring 21 threaded in the internal threaded groove 11, and locking slots 22 uniformly distributed on the inner wall of the external threaded ring 21 in the circumferential direction;

[0063] The internal threaded connection member 3 comprises a cylindrical base 31 and an internal threaded hole 32 formed below the cylindrical base 31 for threading with the external threaded rod 12, wherein the internal threaded hole 32 and the internal threaded groove 11 have opposite thread rotation directions;

[0064] The locking assembly 4 includes a pressing assembly 41 formed in the cylindrical base 31, a central gear 42 driven by the pressing assembly 41, an external gear 43 evenly distributed on the outer periphery of the central gear 42 and meshing with the central gear 42, and an output rack 44 matched with the external gear 43 and transmission connected thereto, wherein the output rack 44 is plugged in and matched with the locking slot 22 one by one.

[0065] As a further implementation:

[0066] The pressing assembly 41 includes a pressing longitudinal hole 41a formed on the top of the cylindrical base 31, a pressing longitudinal rod 41b disposed in the pressing longitudinal hole 41a, and a spiral insertion hole 41c formed on the outer wall of the pressing longitudinal rod 41b;

[0067] The middle gear 42 includes a middle gear cavity 42a formed outside the pressing longitudinal hole 41a, a middle gear body 42b rotatably disposed in the middle gear cavity 42a, and a middle plug 42c formed on the inner wall of the middle gear body 42b and meshing with the spiral plug hole 41c;

[0068] The external gear 43 includes external gear holes 43a uniformly distributed in the circumferential direction below the middle gear cavity 42a, lower receiving holes 43b formed at the lower ends of the external gear holes 43a, external gear shafts 43c rotatably disposed in the external gear holes 43a, upper small gears 43d formed at the upper ends of the external gear shafts 43c and meshing with the middle gear body 42b, and lower large gears 43e formed at the lower ends of the external gear shafts 43c;

[0069] The output rack 44 corresponds to the external gear 43 one by one, and includes a rack insertion hole 44a connected to the lower receiving hole 43b, and a rack body 44b slidably disposed in the rack insertion hole 44a and meshing with the lower large gear 43e;

[0070] Further:

[0071] It also includes a maintaining component 5 for maintaining the pressing component 41 in a high position.

[0072] Regarding the maintenance component 5, the first embodiment:

[0073] The maintaining assembly 5 is a downwardly disposed compression spring 51 disposed in the pressing longitudinal hole 41a and below the pressing longitudinal rod 41b, and a rotation-stopping square rod 51a disposed in the pressing longitudinal hole 41a and penetrating the pressing longitudinal rod 41b.

[0074] Thanks to the above-mentioned improved implementation scheme, the lower compression spring 51 of the maintaining component 5 can squeeze the pressing component 41 under normal conditions to make it in a high position. At this time, the locking component 4 is in an extended posture, which can lock the rotational freedom of the external threaded connector 2 and the internal threaded connector 3.

[0075] Regarding the maintenance component 5, the second embodiment:

[0076] It also includes a buckle assembly 6, including a spring-loaded plug 61, a fixed locking tooth 62, and a movable locking tooth 63;

[0077] The spring plug 61 includes a spring plug hole 61a provided on the side of the pressing longitudinal hole 41a, a side slideway 61b formed on the side of the spring plug hole 61a, a transverse compression spring 61c provided in the spring plug hole 61a, a spring plug rod 61d slidably provided in the spring plug hole 61a, a limit plug block 61e formed on the side of the spring plug rod 61d and plugged into the side slideway 61b, and a pressure inclined surface 61f formed on the side of the spring plug rod 61d and inclined from the upper right to the lower left;

[0078] The fixed locking teeth 62 include a self-locking rod 62a disposed below the spiral insertion hole 41c, a self-locking end 62b formed at the lower end of the self-locking rod 62a, and a fixed inclined surface 62c formed at the lower end of the self-locking end 62b and inclined from the upper right to the lower left;

[0079] The movable lock tooth 63 includes an movable lock cavity 63a formed in the self-locking plug rod 62a, a longitudinal core shaft 63b formed in the movable lock cavity 63a, a movable compression spring 63c wound around the longitudinal core shaft 63b, and a movable lock head 63d slidably arranged on the longitudinal core shaft 63b above the movable compression spring 63c, the upper end of the movable lock head 63d is provided with a reset inclined surface 63e inclined from the upper left to the lower right, and the lower end of the movable lock head 63d is formed with an movable inclined surface 63f flush with the fixed inclined surface 62c.

[0080] Based on the above embodiment, the maintaining component 5 is provided with a side compression spring 52 pressing the left side of the longitudinal hole 41a;

[0081] The side pressure spring 52 includes a side pressure longitudinal cavity 52a arranged on the left side of the pressing longitudinal hole 41a, a side pressure core shaft 52b formed in the side pressure longitudinal cavity 52a, a pressure spring body 52c wound around the side pressure core shaft 52b, and a side pressure ring 52d formed on the left side of the self-locking plug rod 62a and sleeved on the side pressure core shaft 52b.

[0082] Thanks to the above-mentioned improved technical solution, the compression spring body 52c acts on the side pressure ring 52d to drive the fixed locking teeth 62, the movable locking teeth 63, and the pressing assembly 41 to maintain a high position, and finally maintain the extended posture of the locking assembly 4, thereby achieving the locking posture of the external threaded connector 2 and the internal threaded connector 3.

[0083] The case also discloses a method for installing an impeller dynamic balance automatic correction device, comprising the following steps:

[0084] Step 1, using a dynamic balancing test device to determine the position on the correction ring M where a counterweight device needs to be installed;

[0085] Step 2, screw in the external threaded connector 2:

[0086] Rotate the external threaded connector 2 so that the external threaded ring 21 rotates downward along the internal threaded groove 11 until the external threaded connector 2 abuts against the bottom of the internal threaded groove 11;

[0087] Step 3, screw in the internal threaded connector 3:

[0088] Step 3.1, retracting the locking assembly 4:

[0089] Press the pressing assembly 41 downward, and the spiral plug 41c acts on the middle plug 42c to drive the middle gear body 42b to rotate;

[0090] The middle gear body 42b drives the upper small gear 43d, the outer gear shaft 43c, and the lower large gear 43e to rotate, and the lower large gear 43e drives the rack body 44b to shrink into the rack insertion hole 44a;

[0091] Step 3.2, the buckle assembly 6 keeps the locking assembly 4 retracted:

[0092] During step 3.1, the pressing assembly 41 drives the spring plug 61 and the movable locking tooth 63 downward;

[0093] The fixed inclined surface 62c acts on the pressure inclined surface 61f to drive the spring-pressed plug rod 61d and the limit plug block 61e to overcome the damping of the horizontal compression spring 61c and retract until the self-locking end 62b and the fixed inclined surface 62c go down and pass over the spring-pressed plug rod 61d and are locked by the spring-pressed plug rod 61d, so as to prevent the spring-pressed plug 61 and the movable locking tooth 63 from resetting upward under the action of the side compression spring 52, thereby maintaining the retracted posture of the locking assembly 4;

[0094] Step 3.3, tighten the internal threaded connector 3:

[0095] Rotate the internal threaded connector 3 so that the internal threaded hole 32 is threadedly connected to the external threaded rod 12;

[0096] Step 4, locking the outer threaded connector 2 and the inner threaded connector 3:

[0097] Step 4.1, unlocking the buckle assembly 6:

[0098] Continue to press the pressing assembly 41 downward to drive the spring plug 61 and the movable locking tooth 63 downward;

[0099] The movable inclined surface 63f acts on the pressure inclined surface 61f to make it retract by overcoming the damping of the transverse compression spring 61c, until the movable inclined surface 63f and the reset inclined surface 63e pass over the limit plug 61e;

[0100] Release the pressing assembly 41, the compression spring body 52c acts on the side pressure ring 52d to drive the fixed locking teeth 62, the movable locking teeth 63, and the pressing assembly 41 upward:

[0101] The movable locking head 63d, the reset inclined surface 63e, and the movable inclined surface 63f are blocked by the pressure inclined surface 61f and are compressed downwards against the damping of the movable compression spring 63c until they are abutted and fixed with the self-locking end 62b.

[0102] The reset slope 63e continues to move upward to drive the pressure slope 61f to retract, until the reset slope 63e and the movable slope 63f pass over the spring-pressing rod 61d and the pressure slope 61f;

[0103] The pressing assembly 41, the fixed locking teeth 62, and the movable locking teeth 63 are reset upward;

[0104] Step 4.2, extending the locking assembly 4:

[0105] The pressing assembly 41 is reset upward, and the spiral plug 41c acts on the middle plug 42c to drive the middle gear body 42b to rotate in the opposite direction to that in step 3.1;

[0106] The middle gear body 42b drives the upper small gear 43d, the outer gear shaft 43c, and the lower large gear 43e to rotate, and the lower large gear 43e drives the rack body 44b to extend outward. The rack body 44b is inserted into the locking slot 22 to lock the rotational freedom of the external threaded connector 2 and the internal threaded connector 3.

[0107] As a further implementation scheme, an annular groove is formed at the upper end of the cylindrical base 31 , and a counterweight adjustment ring is detachably provided on the annular groove for adjusting the weight of the internal threaded connector 3 .

Claims

1. An automatic correction device for dynamic balance of an impeller, comprising a correction ring (M) arranged on the impeller shaft, wherein a counterweight device is evenly distributed circumferentially on the correction ring. Features: The counterweight device comprises: The mounting base (1) is evenly distributed on the correction ring (M) in the circumferential direction and includes an internal thread groove (11) and an external thread rod (12) formed at the bottom of the internal thread groove (11); An external threaded connection member (2) comprises an external threaded ring (21) threaded into the internal threaded groove (11), and locking slots (22) uniformly distributed in the circumferential direction on the inner wall of the external threaded ring (21); An internal threaded connection member (3) comprises a cylindrical base (31) and an internal threaded hole (32) formed below the cylindrical base (31) for threading with an external threaded rod (12), wherein the internal threaded hole (32) and the internal threaded groove (11) have a thread rotation direction opposite to each other; The locking assembly (4) comprises a pressing assembly (41) formed in a cylindrical base (31), a central gear (42) driven by the pressing assembly (41), an external gear (43) uniformly distributed circumferentially on the outer periphery of the central gear (42) and meshing with the central gear (42), and an output rack (44) matched one-to-one with the external gear (43) and transmission-connected, wherein the output rack (44) is plug-fitted one-to-one with the locking slot (22).

2. An automatic correction device for dynamic balance of an impeller according to claim 1, Features: The pressing assembly (41) comprises a pressing longitudinal hole (41a) formed on the top of the cylindrical base (31), a pressing longitudinal rod (41b) disposed in the pressing longitudinal hole (41a), and a spiral insertion hole (41c) formed on the outer wall of the pressing longitudinal rod (41b); The middle gear (42) comprises a middle gear cavity (42a) formed on the outside of the pressing longitudinal hole (41a), a middle gear body (42b) rotatably arranged in the middle gear cavity (42a), and a middle plug (42c) formed on the inner wall of the middle gear body (42b) and meshing with the spiral plug hole (41c); The external gear (43) comprises external gear holes (43a) uniformly distributed in the circumferential direction below the middle gear cavity (42a), a lower receiving hole (43b) formed at the lower end of the external gear hole (43a), an external gear shaft (43c) rotatably arranged in the external gear hole (43a), an upper small gear (43d) formed at the upper end of the external gear shaft (43c) and meshing with the middle gear body (42b), and a lower large gear (43e) formed at the lower end of the external gear shaft (43c); The output rack (44) corresponds one-to-one to the external gear (43), and comprises a rack insertion hole (44a) connected to the lower receiving hole (43b), and a rack body (44b) slidably disposed in the rack insertion hole (44a) and meshing with the lower large gear (43e).

3. An automatic correction device for dynamic balance of an impeller according to claim 2, Features: It also includes a maintaining component (5) for maintaining the pressing component (41) in a high position.

4. An automatic correction device for dynamic balance of an impeller according to claim 3, Features: The maintaining component (5) is a downwardly disposed compression spring (51) disposed in the pressing longitudinal hole (41a) below the pressing longitudinal rod (41b), and a rotation-stopping square rod (51a) disposed in the pressing longitudinal hole (41a) and penetrating the pressing longitudinal rod (41b).

5. The automatic correction device for dynamic balance of an impeller according to claim 3, Features: It also includes a buckle assembly (6), including a spring-loaded plug (61), a fixed locking tooth (62), and a movable locking tooth (63); The spring-loaded plug (61) comprises a spring-loaded socket (61a) disposed on the side of the pressing longitudinal hole (41a), a side slideway (61b) formed on the side of the spring-loaded socket (61a), a transverse compression spring (61c) disposed in the spring-loaded socket (61a), a spring-loaded plug rod (61d) slidably disposed in the spring-loaded socket (61a), a limit plug block (61e) formed on the side of the spring-loaded plug rod (61d) and plugged into the side slideway (61b), and a pressure inclined surface (61f) formed on the side of the spring-loaded plug rod (61d) and inclined from the upper right to the lower left; The fixed locking tooth (62) comprises a self-locking plug rod (62a) disposed below the spiral plug hole (41c), a self-locking end head (62b) formed at the lower end of the self-locking plug rod (62a), and a fixed inclined surface (62c) formed at the lower end of the self-locking end head (62b) and inclined from the upper right to the lower left. The movable lock tooth (63) comprises a movable lock cavity (63a) formed in the self-locking plug rod (62a), a longitudinal core shaft (63b) formed in the movable lock cavity (63a), a movable compression spring (63c) wound around the longitudinal core shaft (63b), and a movable lock head (63d) slidably arranged on the longitudinal core shaft (63b) above the movable compression spring (63c), wherein the upper end of the movable lock head (63d) is provided with a reset inclined surface (63e) inclined from the upper left to the lower right, and the lower end of the movable lock head (63d) is formed with an movable inclined surface (63f) flush with the fixed inclined surface (62c).

6. An automatic correction device for dynamic balance of an impeller according to claim 5, Features: The maintaining component (5) is a side-mounted compression spring (52) arranged on the left side of the pressing longitudinal hole (41a); The side pressure spring (52) comprises a side pressure longitudinal cavity (52a) arranged on the left side of the pressing longitudinal hole (41a), a side pressure core shaft (52b) formed in the side pressure longitudinal cavity (52a), a pressure spring body (52c) wound around the side pressure core shaft (52b), and a side pressure ring (52d) formed on the left side of the self-locking plug rod (62a) and sleeved on the side pressure core shaft (52b).

7. The method for installing the automatic correction device for dynamic balance of an impeller according to claim 6, Features: The following steps are involved: Step 1, using a dynamic balancing test device, determining the position on the correction ring (M) where a counterweight device needs to be installed; Step 2, screw in the external threaded connector (2): Rotate the external threaded connection member (2) so that the external threaded ring (21) rotates downward along the internal threaded groove (11) until the external threaded connection member (2) abuts against the bottom of the internal threaded groove (11); Step 3, screw in the internal threaded connector (3): Step 3.1, retracting the locking assembly (4): The pressing assembly (41) is pressed downward, and the spiral plug hole (41c) acts on the middle plug (42c), thereby driving the middle gear body (42b) to rotate; The middle gear body (42b) drives the upper small gear (43d), the outer gear shaft (43c), and the lower large gear (43e) to rotate, and the lower large gear (43e) drives the rack body (44b) to shrink into the rack insertion hole (44a); Step 3.2, the buckle assembly (6) keeps the locking assembly (4) retracted: During step 3.1, the pressing assembly (41) drives the spring plug (61) and the movable locking teeth (63) downward; The fixed inclined surface (62c) acts on the pressure inclined surface (61f) to drive the spring-loaded plug rod (61d) and the limit plug block (61e) to overcome the damping of the transverse compression spring (61c) and retract until the self-locking end (62b) and the fixed inclined surface (62c) move downward over the spring-loaded plug rod (61d) and are locked by the spring-loaded plug rod (61d), thereby preventing the spring-loaded plug (61) and the movable locking tooth (63) from resetting upward under the action of the side compression spring (52), thereby maintaining the retracted posture of the locking assembly (4); Step 3.3, tighten the internal threaded connector (3): Rotating the internal threaded connection member (3) so that the internal threaded hole (32) is threadedly connected to the external threaded rod (12); Step 4, lock the outer threaded connector (2) and the inner threaded connector (3): Step 4.1, unlock the buckle assembly (6): Continue to press the pressing assembly (41) downward to drive the spring plug (61) and the movable locking tooth (63) downward; The movable inclined surface (63f) acts on the pressure inclined surface (61f) to make it overcome the damping of the transverse compression spring (61c) and retract until the movable inclined surface (63f) and the reset inclined surface (63e) pass over the limit plug block (61e); The pressing assembly (41) is released, and the compression spring body (52c) acts on the side pressure ring (52d), thereby driving the fixed locking teeth (62), the movable locking teeth (63), and the pressing assembly (41) upward: The movable locking head (63d), the reset inclined surface (63e), and the movable inclined surface (63f) are blocked by the pressure inclined surface (61f) and overcome the damping of the movable compression spring (63c) to be compressed downward until they are abutted and fixed with the self-locking end head (62b); The reset slope (63e) continues to move upwards, thereby driving the pressure slope (61f) to retract, until the reset slope (63e) and the movable slope (63f) pass over the spring-pressing rod (61d) and the pressure slope (61f); The pressing assembly (41), the fixed locking teeth (62), and the movable locking teeth (63) are reset upward; Step 4.2, extending the locking assembly (4): The pressing assembly (41) is reset upward, and the spiral plug (41c) acts on the middle plug (42c) to drive the middle gear body (42b) to rotate in a direction opposite to that in step 3.1; The middle gear body (42b) drives the upper small gear (43d), the outer gear shaft (43c), and the lower large gear (43e) to rotate, and the lower large gear (43e) drives the rack body (44b) to extend outward, and the rack body (44b) is inserted into the locking slot (22) to lock the rotational freedom of the outer threaded connector (2) and the inner threaded connector (3).

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