Stator small tooth pressing plate and adjusting system

Abstract

The utility model discloses a stator small tooth pressure plate and an adjusting system. The stator small tooth pressure plate at least comprises but is not limited to a bearing part used for being connected with a machine base large tooth pressure plate, an inner concave part used for reducing polishing amount, and a top surface part used for being in contact with a pressure finger. The bearing parts are arranged on the two sides of the inner concave part; according to the scheme, the mode of machining the boss is adopted, gaskets do not need to be added, the problem that the gaskets are difficult to weld does not need to be solved, the risk that the gaskets fall off does not exist, and accurate adjustment of the flatness can be achieved by polishing the thickness of the boss.

Description

Technical Field

[0001] The utility model relates to the field of water turbine generator manufacturing, in particular to a stator small tooth pressure plate and an adjustment system. Background Art

[0002] The stator core assembly of a hydro-turbine generator is mainly composed of a machine base and a core. The machine base is used as a fixed component of the stator core. At present, the main method of fixing the stator core on the machine base is a composite tooth pressure plate, that is, a large tooth pressure plate is set on the machine base to bear the weight of the core, and a small tooth pressure plate with pressure fingers is placed on the large tooth pressure plate to press the core. Among them, one of the indicators for evaluating the quality of the core lamination is the circumferential waviness and the height difference in the radial direction. These two indicators mainly depend on the flatness of the large tooth pressure plate.

[0003] In order to ensure the flatness of the large tooth pressure plate, the stator frame of the hydro-turbine generator with a small diameter is usually processed in the factory. For large hydro-turbine generators, due to the large size of the stator frame and the limitation of processing equipment, the large tooth pressure plate of the frame is not suitable for processing and is generally not processed; and due to the limitation of transportation conditions, the frame generally adopts a petal structure and is transported to the construction site for on-site welding and assembly. After welding, the frame is prone to welding deformation. The above two reasons are likely to cause the large tooth pressure plate of the frame to have excessive wave tolerance and excessive radial height tolerance.

[0004] There are currently two solutions to this problem. One is to add a shim between the large tooth pressure plate and the small tooth pressure plate of the machine base for adjustment. Due to the uncertainty of the deformation degree of the large tooth pressure plate after the machine base is rounded, a large number of thin shims of various thicknesses need to be prepared. The adjustment flexibility is insufficient, and the thin shims are difficult to weld and fix. The second way is to grind the large tooth pressure plate on site to ensure its flatness, but due to the large area of the large tooth pressure plate, the on-site grinding workload is very large, which seriously affects the construction period. Utility Model Content

[0005] The purpose of the utility model is to provide a stator small tooth pressure plate and an adjustment system to solve the problems of excessive wave degree and excessive inner and outer height in the radial direction of the large tooth pressure plate of the machine base when the stator core is assembled with the machine base in the prior art.

[0006] The utility model is realized by the following scheme:

[0007] A stator small tooth pressure plate includes at least but not limited to a receiving portion for connecting with a machine base large tooth pressure plate, an inner recess for reducing the amount of grinding, and a top surface for contacting with a pressure finger; the receiving portions are arranged at both sides of the inner recess.

[0008] Based on the above structure of the stator small tooth pressure plate, an assembly hole is provided in the inner recess.

[0009] Based on the structure of the stator small tooth pressing plate described above, the depth of the concave portion is set according to the maximum value during normal adjustment, so that the depth of the concave portion is not less than the numerical value of the maximum value during normal adjustment.

[0010] Based on the structure of the stator small tooth pressing plate described above, the width of the receiving portion is adaptively set according to the weights of the stator core and the winding to be received, so that the force that all the receiving surfaces can receive is not less than the weights of the stator core and the winding.

[0011] Based on the structure of the stator small tooth pressing plate described above, the grooving direction of the concave portion is set perpendicular to the direction where the pressing fingers are located. The receiving portion includes a first receiving edge and a second receiving edge. Both the first receiving edge and the second receiving edge are arc-shaped edges. The first receiving edge and the second receiving edge are arranged at equal intervals. The radian of the first receiving edge and the second receiving edge is adapted to the radian of the circular machine base.

[0012] Based on the structure of the stator small tooth pressing plate described above, the grooving direction of the concave portion is set parallel to the direction where the pressing fingers are located. The receiving portion includes a third receiving edge and a fourth receiving edge. The third receiving edge and the fourth receiving edge are arranged on the opposite sides of the central position of the concave portion.

[0013] This solution also provides an adjustment system, including a stator core, pressing fingers, a machine base large tooth pressing plate and a small tooth pressing plate; the pressing fingers are fixed at the bottom position of the stator core, the small tooth pressing plate is arranged between the machine base large tooth pressing plate and the pressing fingers, and the small tooth pressing plates are uniformly arranged along the outer circumference of the machine base large tooth pressing plate.

[0014] This solution also provides an adjustment system, including a stator core, pressing fingers, a machine base large tooth pressing plate and a small tooth pressing plate; the pressing fingers are fixed at the bottom position of the stator core, the grooving direction of the concave portion of the small tooth pressing plate is set perpendicular to the direction where the pressing fingers are located, the small tooth pressing plate is arranged between the machine base large tooth pressing plate and the pressing fingers, and the small tooth pressing plates are uniformly arranged along the outer circumference of the machine base large tooth pressing plate.

[0015] This solution also provides an adjustment system, including a stator core, pressing fingers, a machine base large tooth pressing plate and a small tooth pressing plate; the pressing fingers are fixed at the bottom position of the stator core, the grooving direction of the concave portion of the small tooth pressing plate is set parallel to the direction where the pressing fingers are located, the small tooth pressing plate is arranged between the machine base large tooth pressing plate and the pressing fingers, and the small tooth pressing plates are uniformly arranged along the outer circumference of the machine base large tooth pressing plate.

[0016] The present solution also provides an adjustment system, including a stator core, press fingers, a large tooth pressing plate of the machine base, and a small tooth pressing plate; the press fingers are fixed at the bottom position of the stator core, the grooving directions of the concave parts in some of the small tooth pressing plates are arranged parallel to the direction where the press fingers are located, the grooving directions of the concave parts in some of the small tooth pressing plates are arranged perpendicular to the direction where the press fingers are located, the small tooth pressing plate is arranged between the large tooth pressing plate of the machine base and the press fingers, and the small tooth pressing plates are evenly arranged along the outer circumference of the large tooth pressing plate of the machine base.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present utility model are as follows:

[0018] 1. In the prior art, the method of adjusting flatness by adding thin gaskets is adopted. Since the thin gaskets are too thin to be welded and fixed, and at the same time, the flatness adjustment result depends on the precise selection of the gasket thickness. In actual operation, combinations of thin gaskets of various different thickness specifications often need to be used, resulting in the flatness adjustment result often being less than satisfactory. However, the present solution adopts the method of machining bosses without adding gaskets, which does not need to solve the problem of difficult gasket welding, has no risk of gasket falling off, and can achieve precise adjustment of flatness by grinding the thickness of the bosses.

[0019] 2. In the prior art, the adjustment method of grinding the large tooth pressing plate is adopted, which has a large amount of grinding work, increasing the labor intensity and installation period of on-site installation. However, with the structure of the present solution, only grinding the bosses can achieve the effect of grinding the large tooth pressing plate. Since the area of the bosses is small, the amount of grinding work can be greatly reduced, and the work efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a side view schematic diagram of the small tooth pressing plate when the grooving of the concave part is perpendicular to the direction where the press fingers are located;

[0021] Figure 2 It is a top view schematic diagram of the small tooth pressing plate when the grooving of the concave part is perpendicular to the direction where the press fingers are located;

[0022] Figure 3 It is a side view schematic diagram of the small tooth pressing plate when the grooving of the concave part is parallel to the direction where the press fingers are located;

[0023] Figure 4 It is a top view schematic diagram of the small tooth pressing plate when the grooving of the concave part is parallel to the direction where the press fingers are located;

[0024] Figure 5 It is a rear view schematic diagram of the small tooth pressing plate when the grooving of the concave part is parallel to the direction where the press fingers are located;

[0025] Figure 6 It is a schematic diagram of the adjustment system in the present utility model;

[0026] Figure 7 It is a schematic diagram of the prior art;

[0027] BRIEF DESCRIPTION OF THE DRAWINGS: 1. receiving portion; 2. concave portion; 3. top surface portion; 4. assembly hole; 5. stator core large tooth pressing plate; 6. first receiving edge; 7. second receiving edge; 8. third receiving edge; 9. fourth receiving edge; 10. stator core; 11. pressing finger. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] All features disclosed in this specification, or all steps in any method or process disclosed, except for mutually exclusive features and / or steps, may be combined in any manner.

[0029] Any feature disclosed in this specification (including any additional claims, abstract) may be replaced by other equivalent or similar-purpose alternative features unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is only an example of a series of equivalent or similar features.

[0030] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0031] In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features.

[0032] Embodiment 1

[0033] As Figures 1 to 5 shown, the present invention provides a technical solution:

[0034] A stator small tooth pressing plate, which at least includes but is not limited to a receiving portion 1 for contacting with the stator core large tooth pressing plate 5, a concave portion 2 for reducing the grinding amount, and a top surface portion 3 for contacting with the pressing finger 11; the receiving portion 1 is disposed on both sides of the concave portion 2.

[0035] Based on the above structure, in this solution, by concavely setting the inside of the contact surface of the small tooth pressing plate with the stator core large tooth pressing plate 5, the grinding amount can be greatly reduced. During assembly, according to the required inclination amount, the receiving portion 1 on one side is ground. On the one hand, the grinding time can be greatly reduced, and on the other hand, the assembly efficiency and accuracy can also be improved.

[0036] As an example, an assembly hole 4 may be provided in the concave portion 2 to fix the small tooth pressing plate through the assembly hole 4.

[0037] As an example, the depth of the concave portion 2 is set according to the maximum value during normal adjustment, so that the depth of the concave portion 2 is not less than the value of the maximum value during normal adjustment;

[0038] Based on the above structure, the depth of the concave portion 2 is the height of the receiving portion 1. Here, the height is the height that can be polished. Setting the height that can be polished to the maximum value during normal adjustment can make this small tooth pressing plate adapt to most situations during assembly and is more flexible to use.

[0039] As an example, the width of the receiving portion 1 is adaptively set according to the weight of the stator core 10 and the winding to be received, so that the force that all receiving surfaces can receive is not less than the weight of the stator core 10 and the winding.

[0040] Based on the above structure, it is only necessary to ensure that the compressive stress is within the allowable stress range of the small tooth pressing plate and the frame steel plate materials, so as to ensure that the receiving portion 1 can safely receive the stator core 10 and the winding.

[0041] As an example, the grooving direction of the concave portion 2 can be set perpendicular to the direction where the pressing finger 11 is located. At this time, the receiving portion 1 can include a first receiving edge 6 and a second receiving edge 7. Both the first receiving edge 6 and the second receiving edge 7 are arc-shaped edges, and the first receiving edge 6 and the second receiving edge 7 are arranged at equal intervals. The distance between the two is the width of the concave portion 2;

[0042] At the same time, the arcs of the first receiving edge 6 and the second receiving edge 7 are adapted to the arc of the circular frame.

[0043] The grooving direction of the concave portion 2 can be set parallel to the direction where the pressing finger 11 is located. At this time, the receiving portion 1 can include a third receiving edge 8 and a fourth receiving edge 9. The third receiving edge 8 and the fourth receiving edge 9 are arranged on opposite sides of the center position of the concave portion 2. The distance between the two is the width of the concave portion 2;

[0044] Based on the above structure, select the small tooth pressing plate structure with different grooving directions according to the actual situation of adjustment and polishing on site, so that this solution is more flexible to use.

[0045] Embodiment 2

[0046] Based on the above Embodiment 1, as Figure 6 shown, the present utility model provides a technical solution:

[0047] An adjustment system includes a stator core 10, a pressing finger 11, a small tooth pressing plate, and a frame large tooth pressing plate 5; the pressing finger 11 is fixed at the bottom position of the stator core 10, the small tooth pressing plate is arranged between the frame large tooth pressing plate 5 and the pressing finger 11, and the small tooth pressing plates are uniformly arranged along the outer circumference of the frame large tooth pressing plate 5.

[0048] Based on the above structure, the pressing finger 11 is fixed on the pressing plate and contacts the stator core. One or more grooves are provided on the contact surface between the pressing plate and the machine base to form a convex platform. The flatness of the large tooth pressing plate 5 of the machine base is adjusted by grinding the convex platform, so that the flatness of the large tooth pressing plate 5 of the machine base can be adjusted quickly.

[0049] Embodiment 3

[0050] Based on the above Embodiment 1, the present utility model provides a technical solution:

[0051] An adjustment system includes a stator core 10, a pressing finger 11, a small tooth pressing plate, and a large tooth pressing plate 5 of the machine base; the pressing finger 11 is fixed at the bottom of the stator core 10, the grooving direction of the concave part of the small tooth pressing plate is set perpendicular to the direction where the pressing finger 11 is located, the small tooth pressing plate is arranged between the large tooth pressing plate 5 of the machine base and the pressing finger 11, and the small tooth pressing plates are evenly arranged along the outer circumference of the large tooth pressing plate 5 of the machine base.

[0052] Based on the above structure, the pressing finger 11 is fixed on the pressing plate and contacts the stator core. One or more grooves are provided on the contact surface between the pressing plate and the machine base to form a convex platform. The flatness of the large tooth pressing plate 5 of the machine base is adjusted by grinding the convex platform, so that the flatness of the large tooth pressing plate 5 of the machine base can be adjusted quickly.

[0053] Embodiment 4

[0054] Based on the above Embodiment 1, the present utility model provides a technical solution:

[0055] An adjustment system includes a stator core 10, a pressing finger 11, a small tooth pressing plate, and a large tooth pressing plate 5 of the machine base; the pressing finger 11 is fixed at the bottom of the stator core 10, the grooving direction of the concave part of the small tooth pressing plate is set parallel to the direction where the pressing finger 11 is located, the small tooth pressing plate is arranged between the large tooth pressing plate 5 of the machine base and the pressing finger 11, and the small tooth pressing plates are evenly arranged along the outer circumference of the large tooth pressing plate 5 of the machine base.

[0056] Based on the above structure, the pressing finger 11 is fixed on the pressing plate and contacts the stator core. One or more grooves are provided on the contact surface between the pressing plate and the machine base to form a convex platform. The flatness of the large tooth pressing plate 5 of the machine base is adjusted by grinding the convex platform, so that the flatness of the large tooth pressing plate 5 of the machine base can be adjusted quickly.

[0057] Embodiment 5

[0058] Based on the above Embodiment 1, the present utility model provides a technical solution:

[0059] An adjustment system includes a stator core 10, pressure fingers 11, small tooth pressing plates, and a frame large tooth pressing plate 5; the pressure fingers 11 are fixed at the bottom position of the stator core 10, the grooving directions of the concave parts in some of the small tooth pressing plates are arranged parallel to the direction where the pressure fingers 11 are located, the grooving directions of the concave parts in some of the small tooth pressing plates are arranged perpendicular to the direction where the pressure fingers 11 are located, the small tooth pressing plates are arranged between the frame large tooth pressing plate 5 and the pressure fingers 11, and the small tooth pressing plates are uniformly arranged along the outer circumference of the frame large tooth pressing plate 5.

[0060] Based on the above structure, the pressure fingers 11 are fixed on the pressing plate and contact the stator core. One or more grooves are provided on the contact surface between the pressing plate and the frame to form a convex platform. The flatness of the frame large tooth pressing plate 5 is adjusted by grinding the convex platform, so that the flatness of the frame large tooth pressing plate 5 can be adjusted quickly.

[0061] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A stator small tooth pressure plate, characterized in that It includes at least but not limited to a receiving part for receiving the large tooth pressing plate of the machine base, a concave part for reducing the grinding amount, and a top surface part for contacting the pressing finger; the receiving part is arranged on both sides of the concave part.

2. The stator small tooth pressing plate according to claim 1, wherein: An assembly hole is arranged in the concave part.

3. The stator small tooth pressing plate according to claim 2, characterized in that: The depth of the concave part is set according to the maximum value during normal adjustment, so that the depth of the concave part is not less than the value of the maximum value during normal adjustment.

4. The stator small tooth pressing plate according to claim 3, wherein: The width of the receiving part is adaptively set according to the weight of the stator core and winding to be received, so that the force that all receiving surfaces can receive is not less than the weight of the stator core and winding.

5. A stator small tooth pressing plate according to claim 1, characterized in that: The grooving direction of the concave part is set perpendicular to the direction where the pressing finger is located. The receiving part includes a first receiving edge and a second receiving edge. Both the first receiving edge and the second receiving edge are arc-shaped edges. The first receiving edge and the second receiving edge are arranged at equal intervals, and the radian of the first receiving edge and the second receiving edge is adapted to the radian of the circular machine base.

6. A stator small tooth pressing plate according to claim 1, characterized in that: The grooving direction of the concave part is set parallel to the direction where the pressing finger is located. The receiving part includes a third receiving edge and a fourth receiving edge. The third receiving edge and the fourth receiving edge are arranged on the opposite sides of the center position of the concave part.

7. A regulating system, characterized in that: It includes a stator core, a pressing finger, a large tooth pressing plate of the machine base, and a small tooth pressing plate as described in any one of claims 1 to 4; the pressing finger is fixed at the bottom position of the stator core, the small tooth pressing plate is arranged between the large tooth pressing plate of the machine base and the pressing finger, and the small tooth pressing plates are evenly arranged along the outer circumference of the large tooth pressing plate of the machine base.

8. An adjustment system, characterized in that: It includes a stator core, a pressing finger, a large tooth pressing plate of the machine base, and a small tooth pressing plate as described in claim 5; the pressing finger is fixed at the bottom position of the stator core, the grooving direction of the concave part of the small tooth pressing plate is set perpendicular to the direction where the pressing finger is located, the small tooth pressing plate is arranged between the large tooth pressing plate of the machine base and the pressing finger, and the small tooth pressing plates are evenly arranged along the outer circumference of the large tooth pressing plate of the machine base.

9. A regulating system, characterized in that: It includes a stator core, a pressing finger, a large tooth pressing plate of the machine base, and a small tooth pressing plate as described in claim 6; the pressing finger is fixed at the bottom position of the stator core, the grooving direction of the concave part of the small tooth pressing plate is set parallel to the direction where the pressing finger is located, the small tooth pressing plate is arranged between the large tooth pressing plate of the machine base and the pressing finger, and the small tooth pressing plates are evenly arranged along the outer circumference of the large tooth pressing plate of the machine base.

10. A regulating system, characterized in that: It includes a stator core, a pressing finger, a large tooth pressing plate of the machine base, a small tooth pressing plate as described in claim 5, and a small tooth pressing plate as described in claim 6; the pressing finger is fixed at the bottom position of the stator core, the grooving direction of the concave part of some small tooth pressing plates is set parallel to the direction where the pressing finger is located, the grooving direction of the concave part of some small tooth pressing plates is set perpendicular to the direction where the pressing finger is located, the small tooth pressing plates are arranged between the large tooth pressing plate of the machine base and the pressing finger, and the small tooth pressing plates are evenly arranged along the outer circumference of the large tooth pressing plate of the machine base.

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