A large hydro generator guide bearing clamping tool

Abstract

This utility model discloses a large-scale hydro-generator guide vane clamping fixture, aiming to solve the problems of inconsistent support fixing points, easy damage to the guide vanes, incomplete clamping, and low standardization in existing clamping fixtures. The fixture is distributed at equal angles around the sliding rotor and includes a support base, support columns, guide vanes, and support bolts. The support columns connect to both ends of the guide vanes, and the support bolts are located in the middle of the guide vanes between the guide vanes and the support base. The support base has a connecting sleeve that is threadedly connected to the support column. Both ends of the guide vanes have rubber-coated pads, and the middle section is connected to the support bolts via the support sleeve and connecting block. The support bolts include a centering nut and a handwheel. This fixture ensures uniform clamping dimensions for the guide vanes, avoids damage and incomplete clamping, improves operational standardization, and provides an accurate benchmark for unit installation and commissioning.

Description

Technical Field

[0001] This utility model relates to the field of bearing support fixtures, and in particular to a bearing support fixture for a large hydro-generator guide vane. Background Technology

[0002] For vertical rotating machinery such as vertical shaft turbine generator sets, multiple sliding guide bearings (radial bearings) are generally installed in the unit's shaft system to ensure the long-term safe and stable operation of key components. To facilitate the installation and disassembly of the guide bearings, segmented bearings are generally used.

[0003] The clearance between the guide bearing and the sliding rotor affects the operating temperature of the guide bearing and the running runout of the unit's shaft system, making it a critical indicator during guide bearing installation. To ensure accurate quantification of the clearance between the guide bearing and the sliding rotor and to predict the running runout of the shaft system, the guide bearing and the sliding rotor must be reliably and precisely clamped together during the on-site installation of the guide bearing and the on-site rotation of the unit. This establishes a unique and accurate benchmark for subsequent guide bearing clearance adjustments and the matching of clearances among the various guide bearings in the shaft system.

[0004] For small units, due to the small size and light weight of the guide bearings, simple auxiliary tools are used on-site, and the guide bearings are manually pushed towards the sliding rotor until they can no longer be pushed. This is considered to mean that the guide bearings and the sliding rotor are tightly bound together, with zero clearance between them. However, for medium and large units, the guide bearings are large and heavy. On-site, simple bearing-holding fixtures need to be made using set screws or bolts, based on the shape and support structure of the guide bearings. By rotating the set screws or bolts, the guide bearings are pressed tightly against the sliding rotor, thus securing them together.

[0005] The main drawbacks of existing guide tile clamping technology are: 1) The support fixing points at both ends of the existing clamping fixture are inconsistent and arbitrary, and the clamping dimensions of each guide tile around the circumference are inconsistent, which is not conducive to subsequent adjustment of guide tile gap and shaft swing. 2) The existing clamping fixture cannot adapt well to the shape of the back of the guide tile at the front end, and the guide tile is easily damaged during operation. 3) The clamping of the guide tile is not a true clamping at the support center, and there is a situation of loose clamping on both sides. 4) The operation method is not uniform and the degree of standardization is low. Summary of the Invention

[0006] The technical problem to be solved by this utility model is that the existing guide tile clamping structure has problems such as inconsistent support and fixing points, difficulty in adapting to the shape of the back of the guide tile and easy damage to the guide tile, non-real support center clamping with incomplete clamping, and inconsistent operation methods with low standardization.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a large-scale hydro-generator guide vane clamping fixture, the clamping fixture is coaxially arranged on the outside of the sliding rotor and the clamping fixture is distributed at equal angles around the axis of the sliding rotor. The clamping fixture includes a support base fixedly arranged on the outside, a support column connected to the inner side wall of the support base, and a guide vane connected to the movable end of the support column. The guide vane is arc-shaped and fits against the outer side wall of the sliding rotor. The support column connects the two ends of the guide vane, and a support bolt is provided between the middle of the guide vane and the support base.

[0008] Preferably, a connecting cylinder is horizontally fixedly installed inside the support base, the support column is threadedly connected to the connecting cylinder, and an annular protrusion is provided in the middle of the support column, with a pin hole opened on the outer side wall of the annular protrusion.

[0009] Preferably, the guide tile is vertically slidably provided with pads at both ends, and the two pads are fixedly connected by a gate-shaped connecting strip. The pads are located between the guide tile and the support column.

[0010] Preferably, the two side walls of the pad are respectively attached to the end wall of the support column and the outer side wall of the guide tile.

[0011] Preferably, a rubber layer is provided on the side wall of the pad facing the guide tile.

[0012] Preferably, a support cylinder is fixedly connected to the middle of the outer side wall of the guide tile, and the support bolt is threadedly connected inside the support cylinder, with the movable end of the support bolt abutting against the inner side wall of the support seat.

[0013] Preferably, a groove is provided on the outer wall of the guide tile, and a connecting block is detachably provided in the groove, and the support cylinder is fixedly connected to the connecting block.

[0014] Preferably, a centering nut is threaded onto the support bolt, and the end wall of the centering nut abuts against the movable end wall of the support cylinder.

[0015] Preferably, the outer wall of the support base is coaxially fixedly connected with arc-shaped ribs, and the ribs are distributed at equal angles along the axial direction of the support base.

[0016] Preferably, a handwheel is fixedly connected to the end of the support bolt away from the guide plate, and the outer circumferential surface of the handwheel is provided with anti-slip texture.

[0017] This utility model provides a large-scale hydro-generator guide bearing clamping tool, which has the following beneficial effects.

[0018] 1. The bearing clamps are distributed at equal angles around the rotor shaft, and the support seats, support columns and other components form a standardized support structure. This avoids the problem of arbitrary support fixing points in existing fixtures, and ensures that the clamping dimensions of each guide bearing are uniform around the circumference. This provides an accurate benchmark for subsequent adjustment of guide bearing gap and shaft runout, which is conducive to improving the installation accuracy of the unit.

[0019] 2. By setting a pad between the guide tile and the support column, with the two side walls of the pad respectively attached to the end wall of the support column and the outer side wall of the guide tile, and the side wall of the pad facing the guide tile having a rubber layer, it can better adapt to the shape of the back of the guide tile, achieve flexible contact, effectively avoid damage to the guide tile during operation, and protect the structural integrity of the guide tile.

[0020] 3. The support column connects the two ends of the guide tile, and the middle of the guide tile is connected to the support seat through the support bolt, forming a force-bearing structure of "support at both ends + tightening in the middle". This ensures that the guide tile holds the sliding rotor with the support center as the force point, avoiding the problem of loose holding on both sides, and improving the reliability and accuracy of the holding between the guide tile and the sliding rotor. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a top view of the structure of an embodiment of the present utility model.

[0022] Figure 2 This is a front view of the guide tile structure in an embodiment of this utility model.

[0023] Figure 3 This is a front view of the structure of the pad in the embodiment of this utility model.

[0024] Figure 4 This is a top view of the pad structure in an embodiment of this utility model.

[0025] In the diagram: 1. Guide plate; 2. Sliding rotor; 3. Support seat; 4. Support column; 5. Connecting cylinder; 6. Connecting block; 7. Support cylinder; 8. Support bolt; 9. Straightening nut; 10. Connecting strip; 11. Pad. Detailed Implementation

[0026] like Figure 1-4 As shown, this utility model provides a large hydro-generator guide vane clamping fixture. The clamping fixture is coaxially arranged on the outside of the sliding rotor 2 and is distributed at equal angles around the axis of the sliding rotor 2. The clamping fixture includes a support base 3 fixedly arranged on the outside, a support column 4 connected to the inner side wall of the support base 3, and a guide vane 1 connected to the movable end of the support column 4. The guide vane 1 is arc-shaped and fits against the outer side wall of the sliding rotor 2. The support column 4 connects the two ends of the guide vane 1, and a support bolt 8 is provided between the middle of the guide vane 1 and the support base 3.

[0027] When installing the guide tile 1, select the installation position of the guide tile 1 according to the site conditions, and fix the support seat 3 on the outside of the guide tile 1. Place the guide tile 1 against the outer wall of the sliding rotor 2, and then place the pad 11 vertically on the outer wall of the guide tile 1. Adjust the length of the support column 4 so that the movable end of the support column 4 abuts against the pad 11, and the pad 11 supports both ends of the outer wall of the guide tile 1. Then adjust the length of the support bolt 8 so that the movable end of the support bolt 8 abuts against the inner wall of the support seat 3. During the adjustment of the support bolt 8, adjust the length of the support columns 4 at both ends according to the support situation to ensure stable support of the outer wall of the guide tile 1 by the two support columns 4 and the support bolt 8.

[0028] like Figure 1 As shown, to facilitate the rotation of the support column 4 by the operator for length adjustment, a connecting cylinder 5 is horizontally fixed inside the support base 3. The support column 4 is threadedly connected to the connecting cylinder 5. An annular protrusion is provided in the middle of the support column 4, and a pin hole is provided on the outer wall of the annular protrusion. By inserting the pin into the pin hole and holding the pin, the support column 4 can be rotated, and its length can be adjusted during rotation.

[0029] like Figure 1 , Figure 3 and Figure 4 As shown. Vertical sliding pads 11 are provided at both ends of the guide tile 1. The two pads 11 are fixedly connected by a portal-shaped connecting strip 10. The pads 11 are located between the guide tile 1 and the support column 4. When connecting the support column 4 to the guide tile 1, the pads 11 are first installed vertically downwards on the guide tile 1. Then, the length of the support column 4 is adjusted so that both ends of the guide tile 1 are tightly pressed against the outer wall of the sliding rotor 2. The pads 11 are used to prevent the support column 4 from damaging the outer wall of the guide tile 1.

[0030] like Figure 3 and Figure 4 As shown. The two side walls of the pad 11 are respectively attached to the end wall of the support column 4 and the outer side wall of the guide tile 1. The pad 11 is inclined relative to the connecting strip 10, and the two side walls of the pad 11 are inclined relative to each other, which can ensure that the support column 4 provides stable support to the guide tile 1.

[0031] In a preferred embodiment of this invention, a rubber layer is provided on the side wall of the pad 11 facing the guide tile 1. By providing the rubber layer, the back of the guide tile 1 can be better protected.

[0032] like Figure 1 and Figure 2As shown. A support cylinder 7 is fixedly connected to the middle of the outer side wall of the guide plate 1. The support bolt 8 is threaded into the support cylinder 7, and the movable end of the support bolt 8 abuts against the inner side wall of the support seat 3. The support cylinder 7 is installed on the guide plate 1, and the support bolt 8 is installed through the support cylinder 7. By adjusting the length of the support bolt 8, it is ensured that the movable end of the support bolt 8 can fit tightly against the inner side wall of the support seat 3.

[0033] like Figure 1 and Figure 2 As shown, a groove is provided on the outer wall of the guide tile 1, and a connecting block 6 is detachably installed in the groove. The support cylinder 7 is fixedly connected to the connecting block 6. When the guide tile 1 needs to be replaced due to wear after long-term use, the connecting block 6 can be directly removed, a new guide tile 1 can be replaced, and the connecting block 6 and support cylinder 7 can be reinstalled. There is no need to replace the entire guide tile clamping fixture, which greatly reduces maintenance costs. Moreover, the mounting block 6 is fixed by bolts, and the threaded holes for connection are evenly distributed on the guide tile 1, so the height of the mounting block 6 can be adjusted according to the support height.

[0034] like Figure 1 As shown. A centering nut 9 is threaded onto the support bolt 8, and the end wall of the centering nut 9 abuts against the movable end wall of the support cylinder 7. The function of the centering nut 9 is to increase the radial constraint on the support bolt 8 and prevent the support bolt 8 from tilting during the stress process.

[0035] In a preferred embodiment of this utility model, an arc-shaped rib is coaxially fixedly connected to the outer wall of the support base 3, and the rib is distributed at equal angles along the axial direction of the support base 3. The arrangement of the rib is used to increase the structural strength of the support base 3 and prevent the support base 3 from bending.

[0036] In a preferred embodiment of this utility model, to facilitate the rotation of the support bolt 8 and thus adjust the length of the exposed section of the support bolt 8, a handwheel is fixedly connected to the end of the support bolt 8 away from the guide plate 1, and the outer circumferential surface of the handwheel is provided with anti-slip texture.

Claims

1. A large hydro-generator guide bearing clamping fixture, characterized in that: The bearing clamp is coaxially arranged on the outside of the sliding rotor (2) and the bearing clamp is distributed at equal angles around the axis of the sliding rotor (2). The bearing clamp includes a support seat (3) fixedly arranged on the outside, a support column (4) connected to the inner side wall of the support seat (3) and a guide plate (1) connected to the movable end of the support column (4). The guide plate (1) is arc-shaped and fits against the outer side wall of the sliding rotor (2). The support column (4) connects the two ends of the guide plate (1). A support bolt (8) is provided between the middle of the guide plate (1) and the support seat (3).

2. The large hydro-generator guide bearing clamping fixture as described in claim 1, characterized in that: A connecting cylinder (5) is horizontally fixed inside the support base (3). The support column (4) is threadedly connected to the connecting cylinder (5). An annular protrusion is provided in the middle of the support column (4), and a pin hole is provided on the outer side wall of the annular protrusion.

3. The large hydro-generator guide bearing clamping fixture as described in claim 1, characterized in that: The guide tile (1) is vertically slidably provided with pads (11) at both ends. The two pads (11) are fixedly connected by a gate-shaped connecting strip (10). The pads (11) are located between the guide tile (1) and the support column (4).

4. The large hydro-generator guide bearing clamping fixture as described in claim 3, characterized in that: The two side walls of the pad (11) are respectively attached to the end wall of the support column (4) and the outer side wall of the guide tile (1).

5. The large hydro-generator guide bearing clamping fixture as described in claim 4, characterized in that: The pad (11) has a rubber layer on its side wall facing the guide tile (1).

6. The large hydro-generator guide bearing clamping fixture as described in claim 1, characterized in that: A support cylinder (7) is fixedly connected to the middle of the outer side wall of the guide plate (1), and the support bolt (8) is threadedly connected inside the support cylinder (7). The movable end of the support bolt (8) abuts against the inner side wall of the support seat (3).

7. The large hydro-generator guide bearing clamping fixture as described in claim 6, characterized in that: The outer wall of the guide tile (1) is provided with a groove, and a connecting block (6) is detachably provided in the groove. The support cylinder (7) is fixedly connected to the connecting block (6).

8. The large hydro-generator guide bearing clamping fixture as described in claim 6, characterized in that: The support bolt (8) is threaded with a centering nut (9), and the end wall of the centering nut (9) abuts against the movable end wall of the support cylinder (7).

9. The large hydro-generator guide bearing clamping fixture as described in claim 1, characterized in that: The outer wall of the support base (3) is coaxially fixedly connected with arc-shaped ribs, which are distributed at equal angles along the axial direction of the support base (3).

10. The large hydro-generator guide bearing clamping fixture as described in claim 1, characterized in that: A handwheel is fixedly connected to one end of the support bolt (8) away from the guide plate (1), and the outer circumferential surface of the handwheel is provided with anti-slip texture.

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