A medium-large size water turbine runner static balancing tool

Abstract

A kind of middle and large-sized water turbine runner static balancing tool belongs to static balancing technical field, the utility model discloses in order to solve the problem that the coaxiality between ball seat support and convex ball of existing water turbine runner balancing equipment cannot be guaranteed.Butting sleeve includes outer cone sleeve and inner cone sleeve, and the inner periphery of outer cone sleeve and the outer periphery of inner cone sleeve are all taper surface gradually converging from bottom to top, and the taper is same, when butting sleeve aligns support sleeve and support seat coaxially, first, separate outer cone sleeve and inner cone sleeve, make the inner periphery of inner cone sleeve and the outer periphery of support seat slide fit, the outer periphery of outer cone sleeve and the inner periphery of support sleeve fit, then push up inner cone sleeve, and drop the balance component to be measured simultaneously, make the inner periphery taper surface of outer cone sleeve and the outer periphery taper surface of inner cone sleeve abut, it can simply and efficiently make the axis of balance component to be measured vertical, and make its gravity center on axis, avoid the measurement error caused by gravity center of balance component to be measured deviating from its axis.

Description

Technical Field

[0001] This utility model belongs to the field of static balancing technology, and in particular relates to a static balancing tool for medium and large-sized water turbine runners. Background Technology

[0002] The turbine runner is a core component of a water turbine unit. To ensure stable operation, a static balance test is required after the runner is manufactured, and the counterweight is adjusted based on the test results. Chinese utility model patent CN119245930A discloses a method for static balancing a water pump turbine runner, which can basically achieve the balancing and counterweight calibration of the turbine runner using balancing equipment. However, a problem remains: if the axis of the balancing component to be tested is not vertical (i.e., if the runner tilts and falls on the ball bearing support), the center of gravity of the balancing component deviates from its axis, causing a balance deviation. Utility Model Content

[0003] The purpose of this invention is to provide a static balancing tool for medium and large-sized turbine runners to solve the problem of balance deviations caused by tilting during existing static balancing tests of turbine runners. The technical solution adopted by this invention is as follows:

[0004] A static balancing tool for a medium-to-large-sized hydro turbine runner, the runner comprising an upper crown impeller and a lower ring impeller, the upper end face of the upper crown impeller being a coupling flange face with a plurality of coupling threaded holes, the lower end face of the upper crown impeller being a third ring face with a plurality of first threaded holes, and the lower end of the inner circumference of the third ring face having a first inner circle, the lower end face of the lower ring impeller being a first ring face, characterized in that the balancing tool comprises:

[0005] A convex sphere is a hemispherical component with a spherical surface at one end. The convex sphere is coaxially connected to the upper crown blade disk through a support sleeve. The rotating wheel, the convex sphere, and the connecting components between them constitute the balance assembly to be tested, which is used to concentrate the weight of the rotating wheel at a point on the spherical surface.

[0006] When testing the static balance of the wheel, the spherical surface of the support base is tangentially abutted against the upper end face of the support base, and the wheel and the connecting component between the wheel and the convex ball are suspended in the air. The static balance of the wheel is judged based on the skewness of the wheel.

[0007] The mating sleeve is used to radially align the support sleeve and support seat when the convex ball mates with the support seat, thereby improving the coaxiality of the support sleeve and support seat.

[0008] Furthermore, 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 outer periphery of the support sleeve includes a second outer circle near the sealing end wall and a first outer circle near the flange. The diameter of the second outer circle is smaller than the diameter of the first outer circle. The second outer circle and the first outer circle are connected by a chamfer. When the support sleeve is connected to the rotating wheel, the first outer circle mates with the first inner circle.

[0009] Furthermore, the flat end of the convex ball is provided with a convex stop, and the end face of the convex stop is provided with a third threaded hole. The end face of the sealing end wall facing the flange is provided with a concave stop. The concave stop is coaxial with the support sleeve. When the convex ball is connected to the support sleeve, the concave stop and the convex stop are engaged. The first screw passes through the sealing end wall and is threadedly connected to the third threaded hole to fix the convex ball to the support sleeve.

[0010] Furthermore, it also includes an adjusting pad for connecting the wheel and the support sleeve.

[0011] Furthermore, it also includes a first square box, which is used to lift the support sleeve and complete the assembly of the convex ball and the support sleeve.

[0012] Furthermore, it also includes several second square boxes, which are arranged circumferentially to support the support sleeve and complete the assembly of the adjustment pad and the support sleeve.

[0013] Furthermore, it also includes several third-party boxes, which are arranged circumferentially around the outer periphery of several second-party boxes to support the rotating wheel and complete the assembly of the support sleeve and the rotating wheel.

[0014] Furthermore, it also includes several jacks, which are arranged circumferentially around the outer periphery of the support base to support the lower ring blade disk before the convex ball mates with the support base.

[0015] Furthermore, it also includes several lifting hooks, which are threadedly connected to several coupling threaded holes in a one-to-one manner, for lifting the wheel.

[0016] Furthermore, the mating sleeve includes an outer conical sleeve and an inner conical sleeve. The inner circumference of the outer conical sleeve and the outer circumference of the inner conical sleeve are both conical surfaces that gradually converge from bottom to top, and the taper is the same. When aligning the support sleeve and the support base coaxially through the mating sleeve, the outer conical sleeve and the inner conical sleeve are first separated, so that the inner circumference of the inner conical sleeve slides into the outer circumference of the support base, and the outer circumference of the outer conical sleeve engages with the inner circumference of the support sleeve. Then, the inner conical sleeve is pushed up, and at the same time, the balance component to be tested is lowered, so that the inner conical surface of the outer conical sleeve and the outer conical surface of the inner conical sleeve fit together and abut.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] The runner, convex ball, and connecting components between them constitute the balancing assembly to be tested. When the spherical surface is tangentially abutting against the upper end face of the support, and the runner and support are coaxial, the runner and the connecting components between the runner and the convex ball are suspended. If the runner is balanced, the coupling flange face should remain horizontal. If the runner is unbalanced, the coupling flange face will tilt to the heavier side. A weight-reducing hole is machined on the heavier side of the runner, and the static balance test is repeated until the coupling flange face remains horizontal. This completes the static balance test of the runner, resulting in a runner with excellent balance, ensuring the stable operation of the turbine unit. By aligning the axes of the convex ball and support by using the mating sleeve, the convex ball and support can be matched with a more precise coaxiality. Alignment is simple and efficient, avoiding measurement errors caused by the tilting of the balancing assembly to be tested or the deviation of the center of gravity of the balancing assembly from its axis. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the test wheel balance state of this utility model;

[0020] Figure 2 yes Figure 1 AA section view;

[0021] Figure 3 yes Figure 1 Enlarged view of point C;

[0022] Figure 4 This is a top view of the adjustment pad;

[0023] Figure 5 yes Figure 4 A magnified image of BB;

[0024] Figure 6 This is a schematic diagram of the rotor structure;

[0025] Figure 7 This is a schematic diagram of the support sleeve structure;

[0026] Figure 8 This is a schematic diagram of a convex sphere.

[0027] Figure 9 This is an exploded view of the mating sleeve;

[0028] Figure 10 This is a schematic diagram of the support sleeve and convex ball being assembled on the first square box;

[0029] Figure 11 This is a schematic diagram of mounting a support sleeve and an adjusting pad on the second box;

[0030] Figure 12 This is a schematic diagram showing the support sleeve and the rotating wheel in the state before assembly.

[0031] In the diagram, 1-support sleeve; 2-convex ball; 3-first screw; 4-adjusting shim; 5-second screw; 6-third screw; 7-lifting chamfer; 8-jack; 9-support base; 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 mating hole; 18-countersunk hole; 19-second mating hole; 20-first inner circle; 21-rotation axis; 22-third annular ring Surface; 23-Third mating hole; 24-First threaded hole; 25-First square box; 26-Second square box; 27-Fourth annular surface; 28-Coupling threaded hole; 29-Third third box; 30-Spherical surface; 31-Coupling flange surface; 32-Matching sleeve; 33-Outer tapered sleeve; 34-Inner tapered sleeve; 35-Flange; 36-Concave stop; 37-Convex stop; 38-Upper crown blade disk; 39-Lower annular blade disk; 40-Sealing end wall; 41-Second threaded hole; 42-Third threaded hole. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the present utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model.

[0033] The connections mentioned in this utility model are divided into fixed connections and detachable connections. Fixed connections, also known as non-detachable connections, include but are not limited to conventional fixed connection methods such as folded connections, riveted connections, adhesive connections, and welded connections. Detachable connections include but are not limited to conventional disassembly methods such as bolt connections, snap-fit ​​connections, pin connections, and hinge connections. When a specific connection method is not explicitly defined, it is assumed that at least one existing connection method can be found to achieve this function, and those skilled in the art can choose according to their needs. For example, a welded connection can be chosen for a fixed connection, and a bolted connection can be chosen for a detachable connection.

[0034] The present invention will be further described in detail below with reference to the accompanying drawings. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0035] Example: Figures 1-12As shown, a static balancing tool for a medium-to-large-sized turbine runner is disclosed. The runner 10 includes an upper crown blade disk 38 and a lower ring blade disk 39. The upper end face of the upper crown blade disk 38 is a coupling flange surface 31, on which a plurality of coupling threaded holes 28 are provided. The lower end face of the upper crown blade disk 38 is a third annular surface 22, on which a plurality of first threaded holes 24 are provided. The lower end of the inner circumference of the third annular surface 22 is provided with a first inner circle 20. The lower end face of the lower ring blade disk 39 is a first annular surface 11. The balancing tool is characterized by comprising:

[0036] The convex ball 2 is a hemispherical component. One end of the convex ball 2 is provided with a spherical surface 30. The convex ball 2 is coaxially connected to the upper crown blade disk 38 through the support sleeve 1. The rotating wheel 10, the convex ball 2 and the connecting component between them form the balance assembly to be tested, which is used to concentrate the gravity of the rotating wheel 10 onto a point on the spherical surface 30.

[0037] When testing the static balance of the rotating wheel 10, the spherical surface 30 is tangentially abutted against the upper end face of the support seat 9, and the rotating wheel 10 and the connecting component between the rotating wheel 10 and the convex ball 2 are suspended in the air. The static balance of the rotating wheel 10 is judged based on the tilt of the rotating wheel 10.

[0038] The mating sleeve 32 is used to radially align the support sleeve 1 and the support seat 9 when the convex ball 2 mates with the support seat 9, thereby improving the coaxiality of the support sleeve 1 and the support seat 9.

[0039] 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 outer periphery 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 the diameter 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 rotating wheel 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 the diameter of the second outer circle 13. A 30×15° chamfer 14 is provided between the first outer circle 12 and the second outer circle 13 to facilitate the centering and mating assembly of the first outer circle 12 and the first inner circle 20.

[0040] The flat end of the convex ball 2 is provided with a convex stop 37, and the end face of the convex stop 37 is provided with a third threaded hole 42. The end face of the sealing end wall 40 facing the flange 35 is provided with a concave stop 36. The concave stop 36 is coaxial 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 stop with each other 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 and the support sleeve 1.

[0041] The runner 10, the convex ball 2, and the connecting components between them constitute the balancing assembly to be tested. When the spherical surface 30 is tangentially abutting against the upper end face of the support seat 9, and the runner 10 and the support seat 9 are coaxial, the runner 10 and the connecting components between the runner 10 and the convex ball 2 are 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 to the unbalanced side. A weight-reducing hole is machined on the unbalanced 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, resulting in a runner 10 with excellent balance, ensuring the stable operation of the turbine unit. By aligning the axes of the convex ball 2 and the support seat 9 through the mating sleeve 32, the convex ball 2 and the support seat 9 can be matched with a more precise coaxiality. The alignment is simple and efficient, avoiding measurement errors caused by the center of gravity of the balancing assembly deviating from the axis of the support seat 9.

[0042] It also includes an adjusting pad 4 for connecting the wheel 10 and the support sleeve 1.

[0043] The end face of flange 35 facing the sealing end wall 40 is defined as the fourth annular surface 27. Flange 35 has several through-hole third engagement holes 23. The fourth annular surface 27 has several second threaded holes 41. Adjusting shim 4 is ring-shaped and has several second engagement holes 19. One end face of adjusting shim 4 is defined as the second annular surface 15. Several countersunk holes 18 are machined on the second annular surface 15. Through-hole first engagement holes 17 are machined on the bottom surface of the countersunk holes 18. Adjusting shim 4 is fitted onto the outer circumference of support sleeve 1 and abuts against the fourth annular surface 27, so that... A number of first mating holes 17 are aligned with a number of second threaded holes 41, and a number of third mating holes 23 are aligned with a number of second mating holes 19. A number of second screws 5 are passed through the corresponding first mating holes 17 and threaded into the corresponding second threaded holes 41, thus connecting the adjusting shim 4 to the support sleeve 1. The countersunk hole 18 is used to accommodate the cap of the corresponding second screw 5, ensuring that after the support sleeve 1, adjusting shim 4, and rotating wheel 10 are assembled, the second annular surface 15 contacts the third annular surface 22 of the rotating wheel, achieving a compact structure while ensuring assembly reliability. The adjusting shim 4 is installed between the rotating wheel 10 and the support sleeve 1 to ensure that the distance between the combined center of gravity of the balancing component under test and the center of the convex ball 2 reaches the required value, avoiding errors in the static balance result of the rotating wheel 10 if the distance between the center of gravity of the balancing component under test and the center of the convex ball 2 does not meet the requirements.

[0044] It also includes a first square box 25, which is used to lift the support sleeve 1 to complete the assembly of the convex ball 2 and the support sleeve 1.

[0045] When assembling the balancing tool, first connect the convex ball 2 and the support sleeve 1, set the sealing end wall 40 of the support sleeve 1 downwards, and place it on several first square boxes 25, so that the several first square boxes 25 are all supported on the lower side of the flange 35, so that the sealing end wall 40 is suspended, which facilitates the assembly of the convex ball 2 and the support sleeve 1.

[0046] It also includes several second square boxes 26, which are arranged circumferentially to support the support sleeve 1 and complete the assembly of the adjusting pad 4 and the support sleeve 1.

[0047] After assembling the convex ball 2 and the support sleeve 1, the second step is to rotate the support sleeve 1 180° so that the sealing end wall 40 faces upward, place the support sleeve 1 on several second square boxes 26, and put the adjusting pad 4 on the support sleeve 1 to facilitate the connection between the adjusting pad 4 and the support sleeve 1.

[0048] It also includes several third-party boxes 29, which are arranged circumferentially around several second-party boxes 26 to support the rotating wheel 10 and complete the assembly of the support sleeve 1 and the rotating wheel 10.

[0049] After completing the connection between the adjusting pad 4 and the support sleeve 1, the third step is to suspend the rotating wheel 10 above the support sleeve 1 and prop it up with several third support boxes 29 to make the rotating wheel 10 and the support sleeve 1 coaxial. Lift the support sleeve 1 upwards, and align the second annular surface 15 with the third annular surface 22, and mate the first outer circle 12 with the first inner circle 20, so that the common axis 16 coincides with the rotation axis 21 of the rotating wheel 10. Pass several third screws 6 one by one through several third mating holes 23, then one by one through several second mating holes 19, and finally thread them one by one with several first threaded holes 24. The rotating wheel 10 and the support sleeve 1 can then be coaxially connected through the adjusting pad 4.

[0050] It also includes several jacks 8, which are arranged circumferentially around the outer periphery of the support seat 9 to support the lower ring blade disk 39 before the convex ball 2 mates with the support seat 9.

[0051] After completing the connection between the support sleeve 1 and the rotating wheel 10, the fourth step is performed. First, the axis of the support base 9 is corrected so that the upper surface of the support base 9 is horizontal. Then, the balancing component to be tested is hoisted above the support base 9. The coaxiality of the support base 9 and the support sleeve 1 is aligned through the mating 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. Then, several jacks 8 are raised so that they 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 base 9. Lower several jacks 8 until they simultaneously detach from the first annular surface 11. The convex ball 2 then tangentially abuts against the upper surface of the support base 9. The weight of the balancing component under test converges at a point on the spherical surface 30. If the balancing component under test is balanced, the coupling flange surface 31 should remain horizontal. If the balancing component under test is unbalanced, the coupling flange surface 31 will tilt to the heavier side. A weight-reducing hole is machined on the heavier side of the wheel 10, and the static balance test is repeated until the coupling flange surface 31 remains horizontal, thus completing the static balance test of the wheel 10.

[0052] It also includes several lifting arms 7, which are threadedly connected to several coupling threaded holes 28 in a one-to-one manner, for lifting the wheel 10. Before conducting the static balance test, the lifting arms 7 are removed.

[0053] The docking sleeve 32 includes an outer conical sleeve 33 and an inner conical sleeve 34. The inner circumference of the outer conical sleeve 33 and the outer circumference of the inner conical sleeve 34 are both conical surfaces that gradually converge from bottom to top, and the taper is the same. When aligning the support sleeve 1 and the support base 9 coaxially through the docking sleeve 32, the outer conical sleeve 33 and the inner conical sleeve 34 are first separated, so that the inner circumference of the inner conical sleeve 34 slides into the outer circumference of the support base 9, and the outer circumference of the outer conical sleeve 33 engages with the inner circumference of the support sleeve 1. Then, the inner conical sleeve 34 is pushed up, and at the same time, the balance component to be tested is lowered, so that the inner conical surface of the outer conical sleeve 33 and the outer conical surface of the inner conical sleeve 34 fit together and abut.

[0054] The above embodiments are merely illustrative examples of the present utility model and do not limit its scope of protection. Those skilled in the art can make partial changes to it, as long as they do not exceed the spirit and essence of the present utility model, they are all within the scope of protection of the present utility model.

Claims

1. A static balancing tool for a medium-to-large-sized turbine runner, wherein the runner (10) includes an upper crown blade disk (38) and a lower ring blade disk (39), the upper end face of the upper crown blade disk (38) is a coupling flange surface (31), the coupling flange surface (31) is provided with a plurality of coupling threaded holes (28), the lower end face of the upper crown blade disk (38) is a third ring surface (22), the third ring surface (22) is provided with a plurality of first threaded holes (24), the lower end of the inner circumference of the third ring surface (22) is provided with a first inner circle (20), and the lower end face of the lower ring blade disk (39) is a first ring surface (11), characterized in that, The balancing tool includes: The convex ball (2) is a hemispherical component. One end of the convex ball (2) is provided with a spherical surface (30). The convex ball (2) is coaxially connected to the upper crown blade disk (38) through the support sleeve (1). The rotating wheel (10), the convex ball (2) and the connecting component between them form the balance assembly to be tested, which is used to concentrate the gravity of the rotating wheel (10) on a point on the spherical surface (30). When testing the static balance of the rotating wheel (10) using the support base (9), the spherical surface (30) is tangentially abutted against the upper end face of the support base (9), and the rotating wheel (10) and the connecting component between the rotating wheel (10) and the convex ball (2) are suspended in the air. The static balance of the rotating wheel (10) is judged based on the skewness of the rotating wheel (10). The mating sleeve (32) is used to radially align the support sleeve (1) and the support seat (9) when the convex ball (2) and the support seat (9) are engaged, thereby improving the coaxiality of the support sleeve (1) and the support seat (9).

2. The static balancing tool for medium and large-sized turbine runners according to claim 1, characterized in that: 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 outer periphery 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 the diameter 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 rotating wheel (10), the first outer circle (12) is engaged with the first inner circle (20).

3. The static balancing tool for medium and large-sized water turbine runners according to claim 2, characterized in that: The flat end of the convex ball (2) is provided with a convex stop (37), and the end face of the convex stop (37) is provided with a third threaded hole (42). The end face of the sealing end wall (40) facing the flange (35) is provided with a concave stop (36). The concave stop (36) is coaxial 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) are in stop fit. 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) and the support sleeve (1).

4. The static balancing tool for medium and large-sized water turbine runners according to claim 3, characterized in that: It also includes an adjusting pad (4) for connecting the wheel (10) and the support sleeve (1).

5. A static balancing tool for medium and large-sized turbine runners according to claim 4, characterized in that: It also includes a first square box (25) for lifting the support sleeve (1) to complete the assembly of the convex ball (2) and the support sleeve (1).

6. A static balancing tool for medium and large-sized water turbine runners according to claim 5, characterized in that: It also includes several second square boxes (26), which are arranged in a circle to support the support sleeve (1) and complete the assembly of the adjustment pad (4) and the support sleeve (1).

7. A static balancing tool for medium and large-sized turbine runners according to claim 6, characterized in that: It also includes several third-party boxes (29), which are arranged circumferentially around several second-party boxes (26) to support the rotating wheel (10) and complete the assembly of the support sleeve (1) and the rotating wheel (10).

8. A static balancing tool for medium and large-sized turbine runners according to claim 7, characterized in that: It also includes several jacks (8), which are arranged circumferentially on the outer periphery of the support base (9) to support the lower ring blade disk (39) before the convex ball (2) and the support base (9) are engaged.

9. A static balancing tool for medium and large-sized turbine runners according to claim 8, characterized in that: It also includes several lifting rods (7), which are threadedly connected to several coupling threaded holes (28) in a one-to-one manner for lifting the wheel (10).

10. A static balancing tool for medium and large-sized turbine runners according to claim 9, characterized in that: The docking sleeve (32) includes an outer conical sleeve (33) and an inner conical sleeve (34). The inner circumference of the outer conical sleeve (33) and the outer circumference of the inner conical sleeve (34) are both conical surfaces that gradually converge from bottom to top, and the taper is the same. When the docking sleeve (32) is used to align the support sleeve (1) and the support seat (9) coaxially, the outer conical sleeve (33) and the inner conical sleeve (34) are first separated, so that the inner circumference of the inner conical sleeve (34) slides with the outer circumference of the support seat (9), and the outer circumference of the outer conical sleeve (33) engages with the inner circumference of the support sleeve (1). Then the inner conical sleeve (34) is pushed up, and the balance component to be tested is lowered at the same time, so that the inner conical surface of the outer conical sleeve (33) and the outer conical surface of the inner conical sleeve (34) fit together and abut.

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