Static balance method for runner of medium-large water turbine

Abstract

The invention discloses a static balance method for middle and large water turbine runners, belongs to the technical field of static balance, and aims to solve the problem that the coaxiality between a ball seat support and a convex ball of existing water turbine runner balance equipment cannot be guaranteed. The butt joint sleeve comprises an outer taper sleeve and an inner taper sleeve, the inner circumference of the outer taper sleeve and the outer circumference of the inner taper sleeve are conical surfaces which are gradually converged from bottom to top, the conicity is the same, and when the butt joint sleeve is used for aligning the supporting sleeve to be coaxial with the supporting seat, the outer taper sleeve and the inner taper sleeve are separated firstly, so that the inner circumference of the inner taper sleeve is in sliding fit with the outer circumference of the supporting seat; the outer periphery of the outer taper sleeve is matched with the inner periphery of the supporting sleeve, then the inner taper sleeve is pushed upwards, meanwhile, the balance assembly to be measured falls, the inner peripheral conical surface of the outer taper sleeve abuts against the outer peripheral conical surface of the inner taper sleeve in an attached mode, the axis of the balance assembly to be measured can be simply and efficiently made to be vertical, and the gravity center of the balance assembly to be measured is made to be located on the axis. Measurement errors caused by the fact that the gravity center of the balance assembly to be measured deviates from the axis are avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of static balancing, and in particular relates to a static balancing method for a medium or large-sized water turbine runner. Background Art

[0002] The runner is the core component of a hydro turbine. To ensure smooth operation, the runner undergoes a static balancing test after manufacture, and the runner counterweight is adjusted based on the test results. Chinese invention patent publication number CN119245930A discloses a method for static balancing a pump-turbine runner. This method essentially allows for calibration of the turbine runner's counterweight using balancing equipment. However, a problem remains: if the axis of the runner's balancing assembly is not vertical—that is, if the runner tilts and rests on the ball support—the center of gravity of the balancing assembly to be tested deviates from its axis, causing balance deviation. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for static balancing of medium-to-large-sized turbine runners to solve the problem of balance deviation caused by tilting the static balancing test position of the existing turbine runners. The technical solution adopted by the present invention is as follows:

[0004] A method for static balancing a medium-to-large-sized water turbine runner, the runner comprising an upper crown blade disc and a lower annular blade disc, the upper end surface of the upper crown blade disc being a coupling flange surface, the coupling flange surface being provided with a plurality of coupling threaded holes, the lower end surface of the upper crown blade disc being a third annular surface, the third annular surface being provided with a plurality of first threaded holes, the inner circumference lower end of the third annular surface being provided with a first inner circle, the lower end surface of the lower annular blade disc being the first annular surface, the balancing method comprising the following steps:

[0005] Step 1: One end of the support sleeve is provided with a sealing end wall, and the other end of the support sleeve is provided with a flange. The sealing end wall is arranged downward and placed on a plurality of first square boxes so that the plurality of first square boxes are supported on the lower side of the flange and the sealing end wall is suspended in the air;

[0006] Step 2: Place the convex ball on the sealing end wall, and coaxially connect the convex ball and the support sleeve with a first screw;

[0007] Step 3: Flip the assembled convex ball and support sleeve 180° so that the sealing end wall faces upward, and place them on a plurality of second square boxes arranged in a circle;

[0008] Step 4: The adjusting pad is in the shape of a ring plate. The adjusting pad is sleeved on the supporting sleeve so that one end surface of the adjusting pad fits against the flange. The adjusting pad and the flange are connected and fixed using a plurality of second screws.

[0009] Step 5: Arrange several third boxes on the outer circumference of the several second boxes, screw several lifting hooks into the several coupling threaded holes one by one, and use the lifting hooks to lift the runner to the several third boxes, with the top of the support sleeve lower than the third annular surface;

[0010] Step 6: Raise the support sleeve so that the other end surface of the adjustment pad abuts against the third annular surface, and the outer periphery of the support sleeve matches the first inner circle. Connect and fix the support sleeve to the rotating wheel with a plurality of third screws. The rotating wheel, the adjustment pad, the support sleeve, the plurality of second screws, the plurality of third screws, and the first screws constitute a balancing assembly to be tested.

[0011] Step 7: Arrange several jacks on the outer circumference of the support base, use a lifting jack to lift the balance assembly to the top of the support base, and align the support sleeve with the support base through the docking sleeve to make it coaxial;

[0012] Step 8: Raise several jacks to support the runner and remove the docking sleeve;

[0013] Step 9: Remove some hanging ropes;

[0014] Step 10: Lower several jacks first, so that the spherical surface of the convex ball is tangentially against the upper end surface of the support seat, and then continue to lower several jacks, so that several jacks are synchronously separated from the runner;

[0015] Step 11: Measure the inclination of the coupling flange surface and determine the eccentric weight and orientation of the runner based on the inclination;

[0016] Step 12: Raise several jacks to re-lift the wheel;

[0017] Step 13: Counterweight the runner according to its eccentricity and orientation;

[0018] Step 14. Repeat steps 10 to 13 until the coupling flange surface reaches a horizontal state, completing the static balance of the runner.

[0019] Furthermore, the number of the first square boxes is two, and in step one, the distance between the sealing end wall and the ground is greater than 600 mm.

[0020] Furthermore, the end surface of the flange facing the sealing end wall is defined as a fourth annular surface. In step three, the distance between the fourth annular surface and the ground is greater than 500 mm.

[0021] Furthermore, the second screw is a hexagon socket head screw, and the number of the first engagement holes is four.

[0022] Furthermore, the number of the third-party boxes is four, and in step five, the top of the support sleeve is 20 mm lower than the height of the third annular surface.

[0023] Furthermore, the number of the third screws is eight, and the third screws are M24 hexagon socket head screws.

[0024] Furthermore, the docking sleeve includes an outer tapered sleeve and an inner tapered sleeve. The inner periphery of the outer tapered sleeve and the outer periphery of the inner tapered sleeve are both conical surfaces that converge gradually from bottom to top and have the same taper. When the support sleeve is aligned to be coaxial with the support seat through the docking sleeve, the outer tapered sleeve and the inner tapered sleeve are first separated, so that the inner periphery of the inner tapered sleeve and the outer periphery of the support seat are slidably matched, and the outer periphery of the outer tapered sleeve is matched with the inner periphery of the support sleeve. Then, the inner tapered sleeve is pushed up, and the balancing component to be tested is dropped at the same time, so that the inner tapered surface of the outer tapered sleeve and the outer tapered surface of the inner tapered sleeve fit together and offset each other.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The runner, the convex ball, and the connecting member between the two constitute the balancing assembly to be tested. When the spherical surface is tangentially against the upper end surface of the support seat, and the runner and the support seat are coaxial, the runner and the connecting member between the runner and the convex ball are suspended. If the runner is balanced, the coupling flange surface should remain horizontal. If the runner is unbalanced, the coupling flange surface will tilt toward the heavier side. A weight-reducing hole is machined on the heavier side of the runner, and the static balancing test is repeated until the coupling flange surface remains horizontal. This completes the static balancing test of the runner, resulting in a well-balanced runner and ensuring the smooth operation of the turbine unit. By aligning the axis of the convex ball and the support seat through the docking sleeve, the convex ball and the support seat can be matched with relatively precise coaxiality. The alignment is simple and the work efficiency is high, avoiding the measurement error caused by the tilt of the balancing assembly to be tested and the deviation of the center of gravity of the balancing assembly to be tested from its axis. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the test wheel balance state of the present invention;

[0028] Figure 2 yes Figure 1 AA section view;

[0029] Figure 3 yes Figure 1 Enlarged view of point C;

[0030] Figure 4 is a top view of the adjustment pad;

[0031] Figure 5 yes Figure 4 BB enlarged image;

[0032] Figure 6 It is a schematic diagram of the structure of the runner;

[0033] Figure 7 It is a structural diagram of the support sleeve;

[0034] Figure 8 It is a schematic diagram of the structure of a convex sphere;

[0035] Figure 9 It is an exploded schematic diagram of the docking sleeve;

[0036] Figure 10 It is a schematic diagram of step 1 of the present invention;

[0037] Figure 11 It is a schematic diagram of step three of the present invention;

[0038] Figure 12 It is a schematic diagram of step five of the present invention.

[0039] In the figure, 1-support sleeve; 2-convex ball; 3-first screw; 4-adjusting washer; 5-second screw; 6-third screw; 7-lifting jack; 8-jack; 9-support seat; 10-rotating wheel; 11-first annular surface; 12-first outer circle; 13-second outer circle; 14-chamfer; 15-second annular surface; 16-common axis; 17-first handle hole; 18-counterbore; 19-second handle hole; 20-first inner circle; 21-rotation axis; 22-third annular ring Surface; 23-third engaging hole; 24-first threaded hole; 25-first square box; 26-second square box; 27-fourth annular surface; 28-coupling threaded hole; 29-third box; 30-spherical surface; 31-coupling flange surface; 32-docking sleeve; 33-outer tapered sleeve; 34-inner tapered sleeve; 35-flange; 36-concave stop; 37-convex stop; 38-upper crown blade disk; 39-lower ring blade disk; 40-sealing end wall; 41-second threaded hole; 42-third threaded hole. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention is described below using specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0041] The connections mentioned in the present invention are divided into fixed connections and detachable connections. The fixed connection refers to a non-detachable connection, including but not limited to conventional fixed connection methods such as hem connection, rivet connection, adhesive connection, and welding connection. The detachable connection refers to but not limited to conventional detachable connection methods such as bolt connection, snap connection, pin connection, and hinge connection. When the specific connection method is not clearly specified, it is assumed that at least one connection method can be found among the existing connection methods to achieve the function. Those skilled in the art can choose according to their needs. For example, a welded connection is selected for a fixed connection, and a bolted connection is selected for a detachable connection.

[0042] The present invention will be further described in detail below with reference to the accompanying drawings. The following embodiments are provided to explain the present invention, but the present invention is not limited to the following embodiments.

[0043] Example: Figures 1 to 12As shown, a static balancing method for a medium-to-large turbine runner is shown. The runner 10 includes an upper crown blade disk 38 and a lower annular blade disk 39. The upper end surface of the upper crown blade disk 38 is a coupling flange surface 31, and the coupling flange surface 31 is provided with a plurality of coupling threaded holes 28. The lower end surface of the upper crown blade disk 38 is a third annular surface 22, and the third annular surface 22 is provided with a plurality of first threaded holes 24. The inner circumference lower end of the third annular surface 22 is provided with a first inner circle 20. The lower end surface of the lower annular blade disk 39 is a first annular surface 11. The balancing method includes the following steps:

[0044] Step 1: One end of the support sleeve 1 is provided with a sealing end wall 40, and the other end of the support sleeve 1 is provided with a flange 35. The sealing end wall 40 is placed downward and placed on the first square boxes 25, so that the first square boxes 25 are all supported on the lower side of the flange 35, leaving the sealing end wall 40 suspended in the air;

[0045] Step 2: Place the convex ball 2 on the sealing end wall 40 and coaxially connect the convex ball 2 and the support sleeve 1 with the first screw 3;

[0046] Step 3: Flip the assembled convex ball 2 and support sleeve 1 180° so that the sealing end wall 40 faces upward, and place them on a plurality of circumferentially arranged second square boxes 26;

[0047] Step 4: The adjusting pad 4 is in the shape of a ring plate. The adjusting pad 4 is sleeved on the supporting sleeve 1 so that one end surface of the adjusting pad 4 fits against the flange 35. A plurality of second screws 5 are used to connect and fix the adjusting pad 4 and the flange 35.

[0048] Step 5: Arrange a number of third boxes 29 on the outer circumference of the number of second square boxes 26, screw a number of lifting hooks 7 into a number of coupling threaded holes 28 one by one, and use the lifting hooks 7 to lift the runner 10 onto the number of third boxes 29, so that the first annular surface 11 respectively abuts against the upper end surfaces of the number of third boxes 29, and the top end of the support sleeve 1 is lower than the third annular surface 22;

[0049] Step 6: Raise the support sleeve 1 so that the other end surface of the adjustment pad 4 abuts against the third annular surface 22, and the outer periphery of the support sleeve 1 matches the first inner circle 20. Connect and fix the support sleeve 1 to the runner 10 through a plurality of third screws 6. The runner 10, the adjustment pad 4, the support sleeve 1, the plurality of second screws 5, the plurality of third screws 6, and the first screw 3 constitute the balancing assembly to be tested.

[0050] Step 7: Arrange several jacks 8 on the outer circumference of the support base 9, use the lifting jack 7 to lift the balance assembly to be tested above the support base 9, and align it through the docking sleeve 32 to make the support sleeve 1 and the support base 9 coaxial;

[0051] Step 8: Raise the jacks 8 so that they support the runner 10 and remove the docking sleeve 32;

[0052] Step 9: Remove several hanging climbs 7;

[0053] Step 10: Lower the jacks 8 until the spherical surface 30 of the convex ball 2 is tangentially in contact with the upper end surface of the support seat 9, and then continue to lower the jacks 8 until they are simultaneously separated from the runner 10.

[0054] Step 11: Measure the inclination of the coupling flange surface 31 and determine the eccentricity and orientation of the runner 10 based on the inclination;

[0055] Step 12: Raise the jacks 8 to re-lift the wheel 10;

[0056] Step 13: counterweight the runner 10 according to the eccentricity and orientation of the runner 10;

[0057] Step 14: Repeat steps 10 to 13 until the coupling flange surface 31 reaches a horizontal state, completing the static balance of the runner 10.

[0058] The convex ball 2 is a hemispherical component with a spherical surface 30 at one end. The convex ball 2 is coaxially connected to the upper crown leaf disk 38 through the support sleeve 1. The runner 10, the convex ball 2 and the connecting component between the two constitute the balance assembly to be tested, which is used to converge the gravity of the runner 10 to a point on the spherical surface 30;

[0059] The outer circumference of the support sleeve 1 includes a second outer circle 13 near the sealing end wall 40 and a first outer circle 12 near the flange 35. The diameter of the second outer circle 13 is smaller than that of the first outer circle 12. The second outer circle 13 and the first outer circle 12 are connected by a chamfer 14. When the support sleeve 1 is connected to the runner 10, the first outer circle 12 mates with the first inner circle 20. The diameter of the first outer circle 12 is 10 mm larger than that of the second outer circle 13. A 30×15° chamfer 14 is provided between the first and second outer circles 12, 13 to facilitate the assembly of the first outer circle 12 and the first inner circle 20, which are aligned and aligned.

[0060] A convex stop 37 is provided at the planar end of the convex ball 2, and a third threaded hole 42 is provided on the end face of the convex stop 37. A concave stop 36 is provided on the end face of the sealing end wall 40 facing the flange 35. The concave stop 36 is coaxially processed with the support sleeve 1. When the convex ball 2 is connected to the support sleeve 1, the concave stop 36 and the convex stop 37 cooperate to ensure the coaxiality of the convex ball 2 and the support sleeve 1, so that the convex ball 2 and the support sleeve 1 form a common axis 16. The first screw 3 passes through the sealing end wall 40 and is threadedly connected to the third threaded hole 42 to fix the convex ball 2 to the support sleeve 1.

[0061] The runner 10, the convex ball 2 and the connecting member between them constitute the balance assembly to be tested. When the spherical surface 30 is tangentially abutting against the upper end surface of the support seat 9 and the runner 10 is coaxial with the support seat 9, the runner 10 and the connecting member between the runner 10 and the convex ball 2 are both suspended. If the runner 10 is balanced, the coupling flange surface 31 should remain horizontal. If the runner 10 is unbalanced, the coupling flange surface 31 will tilt toward the heavier side. A weight reduction hole is machined on the heavier side of the runner 10, and the static balance test is repeated until the coupling flange surface 31 remains horizontal. This completes the static balance test of the runner 10, obtains a well-balanced runner 10, and ensures the smooth operation of the turbine unit. By aligning the axis of the convex ball 2 and the support seat 9 through the docking sleeve 32, the convex ball 2 and the support seat 9 can be matched with relatively precise coaxiality. The alignment is simple and the work efficiency is high, avoiding the measurement error caused by the center of gravity of the balance assembly to be tested deviating from the axis of the support seat 9.

[0062] The flange 35 is provided with a plurality of transparent third engaging holes 23, the fourth annular surface 27 is provided with a plurality of second threaded holes 41, the adjustment pad 4 is provided with a plurality of second engaging holes 19, and one end surface of the adjustment pad 4 is defined as the second annular surface 15. A plurality of countersunk holes 18 are machined on the second annular surface 15, and a transparent first engaging hole 17 is machined on the bottom surface of the countersunk hole 18. The adjustment pad 4 is sleeved on the outer periphery of the support sleeve 1 and abutted against the fourth annular surface 27, so that the plurality of first engaging holes 17 and the plurality of second threaded holes 41 are aligned with each other. 1, the third engagement holes 23 are aligned with the second engagement holes 19, and the second screws 5 are passed through the first engagement holes 17 and threadedly connected to the second threaded holes 41. This connects the adjustment pad 4 to the support sleeve 1. The countersunk holes 18 are used to accommodate the caps of the corresponding second screws 5. This ensures that after the support sleeve 1, the adjustment pad 4, and the runner 10 are assembled, the second annular surface 15 contacts the third annular surface 22, achieving a compact structure while ensuring assembly reliability. The adjustment pad 4 is installed between the runner 10 and the support sleeve 1 to ensure that the distance from the combined center of gravity of the balancing assembly to be tested to the center of the convex ball 2 meets the required value, avoiding the possibility that the distance between the center of gravity of the balancing assembly to be tested and the center of the convex ball 2 does not meet the required value, thereby causing errors in the static balancing results of the runner 10.

[0063] After the adjustment pads 4 are connected to the support sleeve 1, the runner 10 is hoisted above the support sleeve 1 and supported by the third support boxes 29 to ensure coaxiality between the runner 10 and the support sleeve 1. The support sleeve 1 is lifted upward, the second annular surface 15 is aligned with the third annular surface 22, and the first outer circle 12 is aligned with the first inner circle 20, so that the common axis 16 coincides with the rotation axis 21 of the runner 10. The third screws 6 are first passed through the third engagement holes 23 in a one-to-one correspondence, then through the second engagement holes 19 in a one-to-one correspondence, and finally threadedly connected to the first threaded holes 24 in a one-to-one correspondence. This completes the coaxial connection between the runner 10 and the support sleeve 1 via the adjustment pads 4.

[0064] After completing the connection between the support sleeve 1 and the runner 10, first calibrate the axis of the support seat 9 so that the upper end surface of the support seat 9 is horizontal, then hoist the balancing component to be tested above the support seat 9, and align the coaxiality of the support seat 9 and the support sleeve 1 through the docking sleeve 32, thereby indirectly ensuring that the axis of the balancing component to be tested is vertical, so that the center of gravity of the balancing component to be tested is on its axis, and then raise several jacks 8 so that several jacks 8 are supported on the lower side of the first annular surface 11. At this time, the common axis 16 coincides with the axis of the support seat 9, and gradually descends. The dry jack 8 is used until several jacks are synchronously separated from the first annular surface 11, and the convex ball 2 is tangentially abutted against the upper end surface of the support seat 9. The gravity of the balancing component to be tested is concentrated on a point on the spherical surface 30. If the balancing component to be tested is balanced, the coupling flange surface 31 should remain horizontal. If the balancing component to be tested is unbalanced, the coupling flange surface 31 will tilt to the heavier side. A weight reduction hole is processed on the heavier side of the runner 10, and the static balance test is performed again until the coupling flange surface 31 remains horizontal, and the static balance test of the runner 10 is completed.

[0065] There are two first square boxes 25 . In step 1, the distance between the sealing end wall 40 and the ground is greater than 600 mm.

[0066] The end surface of the flange 35 facing the sealing end wall 40 is defined as the fourth annular surface 27 . In step 3, the distance between the fourth annular surface 27 and the ground is greater than 500 mm.

[0067] The second screw 5 is a hexagon socket head screw, and the number of the first engagement holes 17 is four.

[0068] The number of the third boxes 29 is four. In step five, the top of the support sleeve 1 is 20 mm lower than the height of the third annular surface 22 .

[0069] The number of the third screws 6 is eight, and the third screws 6 are M24 hexagon socket head screws.

[0070] The docking sleeve 32 includes an outer tapered sleeve 33 and an inner tapered sleeve 34. The inner periphery of the outer tapered sleeve 33 and the outer periphery of the inner tapered sleeve 34 are both conical surfaces that gradually converge from bottom to top, and have the same taper. When aligning the support sleeve 1 and the support seat 9 to be coaxial through the docking sleeve 32, the outer tapered sleeve 33 and the inner tapered sleeve 34 are first separated, so that the inner periphery of the inner tapered sleeve 34 is slidably matched with the outer periphery of the support seat 9, and the outer periphery of the outer tapered sleeve 33 is matched with the inner periphery of the support sleeve 1, and then the inner tapered sleeve 34 is pushed up, and at the same time, the balancing component to be tested is dropped, so that the inner tapered surface of the outer tapered sleeve 33 and the outer tapered surface of the inner tapered sleeve 34 fit together and offset each other.

[0071] The above embodiments are merely illustrative of the present invention and do not limit its scope of protection. Those skilled in the art may make partial changes thereto, which are within the scope of protection of the present invention as long as they do not exceed the spirit of the present invention.

Claims

1. A static balancing method for a medium-to-large-sized water turbine runner, wherein the runner (10) comprises an upper crown blade disc (38) and a lower annular blade disc (39), wherein the upper end surface of the upper crown blade disc (38) is a coupling flange surface (31), and the coupling flange surface (31) is provided with a plurality of coupling threaded holes (28), the lower end surface of the upper crown blade disc (38) is a third annular surface (22), and the third annular surface (22) is provided with a plurality of first threaded holes (24), and the inner circumference lower end of the third annular surface (22) is provided with a first inner circle (20), and the lower end surface of the lower annular blade disc (39) is a first annular surface (11), characterized in that: The balancing method comprises the following steps: Step 1: One end of the support sleeve (1) is provided with a sealing end wall (40), and the other end of the support sleeve (1) is provided with a flange (35). The sealing end wall (40) is arranged downward and placed on a plurality of first square boxes (25), so that the plurality of first square boxes (25) are supported on the lower side of the flange (35) and the sealing end wall (40) is suspended in the air; Step 2: Place the convex ball (2) on the sealing end wall (40), and coaxially connect the convex ball (2) and the support sleeve (1) with a first screw (3); Step 3: Flip the assembled convex ball (2) and support sleeve (1) 180° so that the sealing end wall (40) faces upward, and place them on a plurality of circumferentially arranged second square boxes (26); Step 4: The adjusting pad (4) is in the shape of a ring plate, and the adjusting pad (4) is sleeved on the supporting sleeve (1) so that one end surface of the adjusting pad (4) fits with the flange (35), and a plurality of second screws (5) are used to connect and fix the adjusting pad (4) and the flange (35); Step 5: Arrange a plurality of third boxes (29) on the outer circumference of the plurality of second boxes (26), screw a plurality of lifting hooks (7) into a plurality of coupling threaded holes (28) one by one, and use the lifting hooks (7) to lift the runner (10) onto the plurality of third boxes (29), with the top end of the support sleeve (1) being lower than the third annular surface (22); Step 6: Raise the support sleeve (1) so that the other end face of the adjustment pad (4) abuts against the third annular surface (22), and the outer periphery of the support sleeve (1) matches the first inner circle (20), and connect and fix the support sleeve (1) to the rotating wheel (10) through a plurality of third screws (6). The rotating wheel (10), the adjustment pad (4), the support sleeve (1), the plurality of second screws (5), the plurality of third screws (6) and the first screw (3) constitute a balancing assembly to be measured; Step 7: Arrange a number of jacks (8) on the outer circumference of the support seat (9), use the lifting device (7) to lift the balancing assembly to be tested to the top of the support seat (9), and align the support sleeve (1) and the support seat (9) through the docking sleeve (32) so that the support sleeve (1) and the support seat (9) are coaxial; Step 8: Raise several jacks (8) so that the jacks (8) support the runner (10) and remove the docking sleeve (32); Step 9: Remove several hanging ropes (7); Step 10: first lower the plurality of jacks (8) so that the spherical surface (30) of the convex ball (2) is tangentially in contact with the upper end surface of the support seat (9), and then continue to lower the plurality of jacks (8) so that the plurality of jacks (8) are synchronously separated from the runner (10); Step 11: Measure the inclination of the coupling flange surface (31), and determine the eccentricity and orientation of the runner (10) according to the inclination; Step 12: Raise several jacks (8) to re-lift the wheel (10); Step 13: counterweight the runner (10) according to the eccentricity and orientation of the runner (10); Step 14: Repeat steps 10 to 13 until the coupling flange surface (31) reaches a horizontal state, completing the static balance of the runner (10).

2. A static balancing method for a medium or large-sized hydraulic turbine runner according to claim 1, characterized in that: The number of the first square boxes (25) is two. In step 1, the distance between the sealing end wall (40) and the ground is greater than 600 mm.

3. The static balancing method for a medium or large-sized hydraulic turbine runner according to claim 1, characterized in that: The end surface of the flange (35) facing the sealing end wall (40) is defined as the fourth annular surface (27). In step 3, the distance between the fourth annular surface (27) and the ground is greater than 500 mm.

4. A static balancing method for a medium or large-sized hydraulic turbine runner according to claim 1, characterized in that: The second screw (5) is a hexagon socket head screw, and the number of the first engagement holes (17) is four.

5. The static balancing method for a medium or large-sized hydraulic turbine runner according to claim 1, characterized in that: The number of the third-party boxes (29) is four. In step five, the top of the support sleeve (1) is 20 mm lower than the height of the third annular surface (22).

6. The static balancing method for a medium or large-sized hydraulic turbine runner according to claim 1, characterized in that: The number of the third screws (6) is eight, and the third screws (6) are M24 hexagon socket head screws.

7. A static balancing method for a medium or large-sized hydraulic turbine runner according to any one of claims 1 to 6, characterized in that: The docking sleeve (32) includes an outer tapered sleeve (33) and an inner tapered sleeve (34). The inner periphery of the outer tapered sleeve (33) and the outer periphery of the inner tapered sleeve (34) are both tapered surfaces that gradually converge from bottom to top and have the same taper. When the support sleeve (1) and the support seat (9) are aligned coaxially by the docking sleeve (32), the outer tapered sleeve (33) and the inner tapered sleeve (34) are first separated, so that the inner periphery of the inner tapered sleeve (34) is slidably matched with the outer periphery of the support seat (9), and the outer periphery of the outer tapered sleeve (33) is matched with the inner periphery of the support sleeve (1). Then, the inner tapered sleeve (34) is pushed up, and the balancing component to be tested is dropped at the same time, so that the inner tapered surface of the outer tapered sleeve (33) and the outer tapered surface of the inner tapered sleeve (34) are fitted and counteracted.

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