A steam turbine generator stator core positioning structure

Abstract

The present invention discloses a steam turbine generator stator core positioning structure, which belongs to the field of stator core installation technology, and includes a stator core body, a support seat, a first wall plate and an adjustment assembly; the stator core body lies horizontally on the support seat; the first wall plate is symmetrically arranged on the support seat; the first wall plates are respectively provided with adjustment assemblies in contact with the stator core body; the adjustment assembly includes a support sleeve, and the support sleeve is internally threaded with an adjustment bolt; the support sleeve is arranged on the upper part of the first wall plate and is inclined; the stator core body is sleeved with a plurality of support ring plates distributed along its axis and connected to the two first wall plates and the support seat. The inclined adjustment assembly points to the center of the stator core body, and cooperates with the support of the support seat to form a three-point support, and is convenient for adjusting the position of the stator core body; the plurality of support ring plates reduce the contact area between the stator core body and the peripheral components, and reduce the transmission of vibration amplitude.

Description

Technical Field

[0001] The invention belongs to the technical field of stator core installation, in particular to a steam turbine generator stator core positioning structure. Background Art

[0002] The stator core is one of the most important parts of a steam turbine generator, which serves to fix the stator coil and form a magnetic field circuit. If the center of the stator core does not coincide with the center of the base, it will cause unilateral magnetic pull and cause the core to vibrate. In order to ensure that the stator core is concentric with the base, the traditional method requires the design of a special positioning tool, and the tightness of the core teeth and yoke must be checked multiple times; if the deviation between the stator core and the base is large, the thickness of the core sector sheet or the addition of sector sheets must be used to adjust the deviation of the center misalignment. For large-capacity generators, the mass of the stator core ranges from tens of tons to hundreds of tons. If the above method is used to adjust the deviation, the process becomes complicated and the workload is greatly increased.

[0003] When the steam turbine generator is running, the power frequency or multiple frequency vibration of the stator core will be transmitted to the foundation through the base. If the core and base fixing structure that reduces the vibration is not adopted, the stator core vibration will have an adverse effect on the base, foundation and auxiliary systems. Traditionally, the core is connected to the base through horizontal or vertical spring plates, but this structure has problems such as a large number of spring plates and the core and base cannot be produced separately. Summary of the invention

[0004] In order to solve the problems of inconvenient adjustment of the coincidence between the center of the stator core body and the center of the support seat, and large vibration amplitude transmission when the equipment is running, the present invention provides a steam turbine generator stator core positioning structure.

[0005] The present invention is achieved through the following technical solutions:

[0006] A steam turbine generator stator core positioning structure comprises a stator core body, a support seat, a first wall plate and an adjustment component;

[0007] The stator core body lies horizontally on the support seat;

[0008] The first wall plates are symmetrically arranged on the support seats on both sides of the stator core body; the first wall plates are respectively provided with the adjustment components for contacting and adjusting with the stator core body;

[0009] The adjustment assembly comprises a support sleeve mounted on the first wall plate, wherein the support sleeve is internally threadedly connected with an adjustment bolt in contact with the stator core body; the support sleeve is arranged on the upper portion of the first wall plate and is arranged obliquely;

[0010] The stator core body is sleeved with a plurality of supporting ring plates distributed along its axial center line and connected to the two first wall plates and the supporting seat.

[0011] The inclined adjustment component points to the center of the stator core body and cooperates with the support of the support seat to form a three-point support, and the force direction is directed to the center of the stator core body, which facilitates the adjustment of the position of the stator core body; multiple support ring plates reduce the contact area between the stator core body and the peripheral components, and cooperate with the three-point support to reduce the transmission of vibration amplitude during equipment operation.

[0012] A further improvement of the present invention is that the support sleeve and the adjusting bolt are penetrated with a fixing hole, and a fixing pin is provided in the fixing hole to limit the relative position of the support sleeve and the adjusting bolt. After the position of the stator core body is adjusted, a fixing hole is processed to pass through the support sleeve and the adjusting bolt, and the fixing pin is used to lock the axial length of the adjustment assembly to prevent the stator core body from moving.

[0013] A further improvement of the present invention is that the end surface of the adjusting bolt away from the support sleeve is an arc surface, which increases the contact angle between the end of the adjusting bolt and the stator core body and increases the reliability of the contact with the stator core body.

[0014] A further improvement of the present invention is that at least two of the above-mentioned adjustment components are provided on one side of the stator core body, and at least two of the adjustment components are distributed along the axis of the stator core body. Through multiple adjustment components, each point on the axis of the stator core body is coincident with the center of the support seat, and the adjustment action points on the stator core body are increased.

[0015] A further improvement of the present invention is that a second wall plate perpendicular to the first wall plate is provided on the inner wall of the first wall plate, and the side of the support sleeve is fixedly mounted on the side of the second wall plate. The plane of the second wall plate is perpendicular to the plane of the first wall plate, and the side of the second wall plate contacts the side wall of the support sleeve. With the increase of the contact area of ​​the support sleeve and the angle matching of the second wall plate and the first wall plate, the support sleeve is improved in adjusting and supporting the stator core body through the adjusting bolt.

[0016] A further improvement of the present invention is that the outer wall of the stator core body is provided with a plurality of core fixing ribs evenly distributed around the circumference thereof; the length direction of the plurality of core fixing ribs is parallel to the axis of the stator core body; the end of the adjusting bolt away from the support sleeve is in contact with the core fixing rib. The overall firmness of the stator core body is increased by the plurality of core fixing ribs, and the core fixing ribs are in contact with the adjusting bolts, so as to accurately control the force direction of the stator core body and assist in completing the position adjustment of the stator core body.

[0017] A further improvement of the present invention is that the inner side of the support ring plate contacts the core fixing ribs, and the outer side of the support ring plate contacts the first wall plate. While the support ring plate supports the stator core body, the contact surface of the stator core body is effectively reduced, thereby effectively reducing the transmission of a large vibration amplitude when the equipment is running.

[0018] A further improvement of the present invention is that the inner side of the support ring plate is provided with a groove corresponding to the core fixing rib, and a wedge-shaped block fixedly connected to the core fixing rib is welded in the groove; the inclined surfaces of adjacent wedge-shaped blocks are symmetrically arranged. The wedge-shaped blocks are used to fill the gap between the core fixing rib and different support ring plates, and the inclined surfaces of adjacent wedge-shaped blocks are symmetrical, which can avoid the support ring plate from being squeezed in the same direction and becoming unstable.

[0019] A further improvement of the present invention is that the first wall plate is vertically provided with a plurality of through holes corresponding to the support ring plate, and a connector fixedly connected to the support ring plate is welded in the through hole. The support ring plate is connected at one end of the connector, and the other end is connected in the through hole, and the plurality of connectors cooperate to further reduce the contact area between the support ring plate and the first wall plate, and to compensate for the defect caused by the different spacing between the support ring plate and the first wall plate, so as to improve the assembly efficiency.

[0020] It can be seen from the above technical scheme that the beneficial effects of the present invention are: by pointing the inclined adjustment component to the center of the stator core body and cooperating with the support of the support seat, a three-point support is formed, and the force direction is all directed to the center of the stator core body, which is convenient for adjusting the position of the stator core body; multiple support ring plates reduce the contact area between the stator core body and the peripheral components, and cooperate with the three-point support to reduce the transmission of vibration amplitude during equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of a specific implementation mode of the present invention.

[0023] Figure 2 It is a schematic diagram of the structure of the regulating component according to a specific embodiment of the present invention.

[0024] Figure 3 It is a schematic diagram of the combination of A-axis core fixing ribs, wedge plates and support ring plates according to a specific implementation mode of the present invention.

[0025] In the accompanying drawings: 1. stator core body, 2. support ring plate, 21. groove, 3. support seat, 4. first wall plate, 5. connecting piece, 6. second wall plate, 7. adjustment assembly, 71. support sleeve, 72. adjustment bolt, 721. arc surface, 8. core fixing rib, 9. wedge block. DETAILED DESCRIPTION

[0026] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0027] As shown in the accompanying drawings, a steam turbine generator stator core positioning structure includes a stator core body 1, a support seat 3, a first wall plate 4 and an adjustment component 7;

[0028] The stator core body 1 lies horizontally on the support seat 3 ; the top surface of the support seat 3 is in a concave arc shape to increase adaptability to the stator core body 1 .

[0029] The first wall plates 4 are symmetrically arranged on the support bases 3 on both sides of the stator core body 1. The two first wall plates 4 serve as a basic platform for supporting the stator core body 1.

[0030] The outer wall of the stator core body 1 is provided with a plurality of core fixing ribs 8 evenly distributed around the circumference thereof; the length direction of the plurality of core fixing ribs 8 is parallel to the axis of the stator core body 1; the plurality of core fixing ribs 8 increase the overall firmness of the stator core body 1.

[0031] The stator core body 1 is sleeved with a plurality of support ring plates 2 distributed along its axis and connected to the two first wall plates 4 and the support seat 3. The inner side of the support ring plate 2 is in contact with the core fixing rib 8, and the outer side is in contact with the first wall plate 4. While the support ring plate 2 supports the stator core body 1, the contact surface of the stator core body 1 is effectively reduced, thereby effectively reducing the transmission of a large vibration amplitude when the equipment is running.

[0032] The inner side of the support ring plate 2 is provided with a groove 21 corresponding to the core fixing rib 8, and a wedge block 9 fixedly connected to the core fixing rib 8 is welded in the groove 21; the inclined surfaces of adjacent wedge blocks 9 are symmetrically arranged. The wedge blocks 9 are used to fill the gap between the core fixing rib 8 and different support ring plates 2, and the inclined surfaces of adjacent wedge blocks 9 are symmetrical, which can prevent the support ring plate 2 from being squeezed in the same direction and becoming unstable.

[0033] The first wall plate 4 is vertically provided with a plurality of through holes corresponding to the support ring plate 2, and the through holes are welded with connectors 5 fixedly connected to the support ring plate 2. One end of the connector 5 is connected to the support ring plate 2, and the other end is connected to the through hole, and the plurality of connectors 5 cooperate to further reduce the contact area between the support ring plate 2 and the first wall plate 4, and can make up for the defects caused by the different spacings between the support ring plate 2 and the first wall plate 4, so as to improve the assembly efficiency.

[0034] The inclined surface of the wedge block 9 is welded in the groove 21, and the side of the wedge block 9 opposite to the inclined surface is welded to the core fixing rib 8. Welding can effectively ensure that the wedge plate will not loosen or slide after being embedded in the groove 21. While forming support, it also forms a reverse pulling force to maintain the force balance between the components. The connecting piece 5 is a circular tube structure, one end of the connecting piece 5 is welded in the through hole of the first wall plate 4, and the other end is welded to the support ring plate 2. The welding connection method ensures the fixed connection strength between the support ring plate 2 and the stator core body 1, and between the support ring plate 2 and the first wall plate 4. To avoid excessive amplitude when the equipment is running, the support strength of the connection point is increased by welding.

[0035] A second wall plate 6 perpendicular to the first wall plate 4 is provided on the inner wall of the first wall plate 4, and the second wall plate 6 is arranged on the upper part of the first wall plate 4. The first wall plate 4 is respectively provided with the adjustment components 7 for contact and adjustment with the stator core body 1. At least two adjustment components 7 are provided on one side of the stator core body 1, and at least two adjustment components 7 are distributed along the axis of the stator core body 1. Through multiple adjustment components 7, each point on the axis of the stator core body 1 is coincident with the center of the support seat 3, and the adjustment action points on the stator core body 1 are increased.

[0036] The adjustment assembly 7 comprises a support sleeve 71 which is installed obliquely on the second wall plate 6, and the support sleeve 71 is internally threadedly connected with an adjustment bolt 72 which contacts the stator core body 1;

[0037] The side of the support sleeve 71 is fixedly mounted on the side of the second wall plate 6. The plane of the second wall plate 6 is perpendicular to the plane of the first wall plate 4, and the side of the second wall plate 6 contacts the side wall of the support sleeve 71. With the increase of the contact area of ​​the support sleeve 71 and the angle matching of the second wall plate 6 and the first wall plate 4, the support sleeve 71 is improved in adjusting and supporting the stator core body 1 through the adjusting bolt 72.

[0038] The end of the adjusting bolt 72 away from the support sleeve 71 abuts against the core fixing rib 8. The core fixing rib 8 contacts the adjusting bolt 72, accurately controls the force direction of the stator core body 1, and assists in completing the position adjustment of the stator core body 1.

[0039] The end surface of the adjusting bolt 72 away from the support sleeve 71 is an arc surface 721. The arc surface 721 increases the contact angle between the end of the adjusting bolt 72 and the stator core body 1, thereby increasing the reliability of the contact with the stator core body 1.

[0040] The inclined adjustment component 7 points to the center of the stator core body 1 and cooperates with the support of the support seat 3 to form a three-point support, and the force direction is all directed to the center of the stator core body 1, which facilitates the adjustment of the position of the stator core body 1.

[0041] The support sleeve 71 and the adjusting bolt 72 are penetrated with fixing holes, and the fixing holes are provided with fixing pins for limiting the relative positions of the support sleeve 71 and the adjusting bolt 72. After the position of the stator core body 1 is adjusted, a fixing hole is processed to pass through the support sleeve 71 and the adjusting bolt 72, and the fixing pin is used to lock the axial length of the adjustment assembly 7 to prevent the stator core body 1 from moving.

[0042] The arc surface 721 of the adjusting bolt 72 is welded to the core fixing rib 8. After the adjusting bolt 72 pushes the position of the stator core body 1 on one side, it can not only form support, but also cooperate with the adjusting bolt 72 on the opposite side to form a pulling force on the stator core body 1, so as to achieve force balance between the components.

[0043] The stator core positioning structure of a steam turbine generator described in the present invention points to the center of the stator core body through an inclined adjustment component, and cooperates with the support of a support seat to form a three-point support, and the force direction is all directed to the center of the stator core body, which is convenient for adjusting the position of the stator core body; multiple support ring plates reduce the contact area between the stator core body and the peripheral components, and cooperate with the three-point support to reduce the transmission of vibration amplitude when the equipment is running.

[0044] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0045] The terms "upper", "lower", "outer side", "inner side", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish the relative relationship in position if they exist, and do not need to be qualitative. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0046] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A steam turbine generator stator core positioning structure, characterized in that: It comprises a stator core body (1), a support seat (3), a first wall plate (4) and an adjustment component (7); The stator core body (1) lies horizontally on the support seat (3); The first wall plate (4) is symmetrically arranged on the support base (3) on both sides of the stator core body (1); the first wall plate (4) is respectively provided with the adjustment component (7) for contact adjustment with the stator core body (1); The adjustment assembly (7) comprises a support sleeve (71) mounted on the first wall plate (4), the support sleeve (71) being internally threadedly connected with an adjustment bolt (72) in contact with the stator core body (1); the support sleeve (71) is arranged on the upper part of the first wall plate (4) and is arranged in an inclined manner; The stator core body (1) is sleeved with a plurality of support ring plates (2) distributed along its axial centerline and connected to the two first wall plates (4) and the support seat (3).

2. A steam turbine generator stator core positioning structure according to claim 1, characterized in that: The support sleeve (71) and the adjusting bolt (72) are both penetrated by a fixing hole, and a fixing pin for limiting the relative position of the support sleeve (71) and the adjusting bolt (72) is arranged in the fixing hole.

3. A steam turbine generator stator core positioning structure according to claim 1, characterized in that: The end surface of the adjusting bolt (72) away from the support sleeve (71) is an arc surface (721).

4. A steam turbine generator stator core positioning structure according to any one of claims 1 to 3, characterized in that: At least two adjusting components (7) are provided on one side of the stator core body (1), and at least two adjusting components (7) are distributed along the axis of the stator core body (1).

5. A steam turbine generator stator core positioning structure according to claim 4, characterized in that: A second wall plate (6) perpendicular to the first wall plate (4) is provided on the inner wall of the first wall plate (4), and the side surface of the support sleeve (71) is fixedly mounted on the side surface of the second wall plate (6).

6. A steam turbine generator stator core positioning structure according to claim 1, characterized in that: The outer wall of the stator core body (1) is provided with a plurality of core fixing ribs (8) evenly distributed around the circumference thereof; the length direction of the plurality of core fixing ribs (8) is parallel to the axis of the stator core body (1); and one end of the adjusting bolt (72) away from the support sleeve (71) abuts against the core fixing rib (8).

7. A steam turbine generator stator core positioning structure according to claim 6, characterized in that: The inner side of the support ring plate (2) is in contact with the core fixing rib (8), and the outer side of the support ring plate (2) is in contact with the first wall plate (4).

8. A steam turbine generator stator core positioning structure according to claim 7, characterized in that: A groove (21) corresponding to the core fixing rib (8) is provided on the inner side of the support ring plate (2), and a wedge-shaped block (9) fixedly connected to the core fixing rib (8) is welded in the groove (21); the inclined surfaces of adjacent wedge-shaped blocks (9) are symmetrically arranged.

9. A steam turbine generator stator core positioning structure according to any one of claims 6 to 8, characterized in that: The first wall plate (4) is provided with a plurality of through holes corresponding to the support ring plate (2) in the vertical direction, and connecting pieces (5) fixedly connected to the support ring plate (2) are welded in the through holes.

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