Adjustable rotor supporting device

Abstract

The utility model discloses an adjustable rotor supporting device, which comprises a bearing box, a rotor, rollers, bolts, roller supporting frames, a fixed steel plate, a rolling bearing, a steel plate and a tie bar, the rotor is connected with the bearing box, the two roller supporting frames are respectively arranged at two ends below the rotor, the bottoms of the roller supporting frames are connected with the steel plate welded on the bearing box, and the roller supporting frames are H-shaped. Grooves are formed in the middles of the tops of the two ends, two bolt holes are formed in each of the two sides of each groove and used for fixing a rolling bearing, four bolt holes are formed in the middle of each groove and used for being connected with tie bars, and eight bolt holes are formed in the bottom of each groove and used for being connected with steel plates welded to a bearing box. The four fixed steel plates are provided with convex surfaces in the middle and bolt holes in the planes at the two ends, and are connected with the roller support frame through bolts; and the two rollers are bakelite rollers, are connected with the roller support frame through rolling bearings, and are arranged at the two ends below the rotor.

Description

Technical Field

[0001] The utility model relates to a support device, in particular to an adjustable rotor support device, belonging to the technical field of rotor support. Background Art

[0002] The country has increasingly strict environmental requirements and higher air quality requirements. In order to reduce environmental pollution, more and more large-capacity units are increasing. The resulting chain reaction is that small-capacity units are facing shutdown and elimination. How to solve the continuous reuse of small enterprise units is an urgent problem to be solved. With the success of the renovation of Unit 2 of Yahekou Power Plant to add a synchronous condenser function by reusing old components, it has set a precedent for the renovation of other enterprise small emergency power units and retired thermal power units to add a synchronous condenser function. Most of the units renovated by reusing old components and adding a synchronous condenser function are old units. In the prior art, many unit rotors are supported by single bearings. If switched to the synchronous condenser mode, the steam turbine rotor and the generator rotor are disengaged, and a temporary support is required for the coupling on the steam turbine side close to the generator side. General temporary supports cannot achieve turning the rotor by barring gear. If the rotor is not turned for a long time, it will cause permanent bending of the rotor and cannot realize the switching between the synchronous condenser mode and the power generation mode. The utility model can realize the operation in the synchronous condenser mode and the normal turning of the steam turbine side rotor under the state of single-bearing support of the rotor. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide an adjustable rotor support device, which can realize the operation in the synchronous condenser mode and the normal turning of the steam turbine side rotor under the state of single-bearing support of the rotor, and avoid the bending of the rotor shaft.

[0004] The technical solution adopted by the utility model to solve the technical problem is as follows:

[0005] An adjustable rotor support device includes a bearing box, a rotor, rollers, bolts, roller support frames, fixed steel plates, rolling bearings, steel plates, and tie bars. The rotor is connected to the bearing box. The steel plate is welded to the bottom of the bearing box at the location where the roller support frame is installed. The rolling bearing is fixed to the roller support frame through hexagon bolts and the fixed steel plate. The rollers are connected to the rolling bearings. The bottom of the roller support frame is fixed to the steel plate welded to the bearing box through bolts. The tie bars are connected to the roller support frames through bolts.

[0006] The roller support frames are provided in two, respectively arranged at both ends under the rotor. The bottom is connected to the steel plate welded to the bearing box, in an "H" shape. Grooves are provided in the middle of the top of both ends, and two bolt holes are provided on each side of the groove for fixing the rolling bearing. Four bolt holes are provided in the middle for connecting the stay bars, and eight bolt holes are provided at the bottom for connecting the steel plate welded to the bearing box. The two roller support frames are connected by stay bars.

[0007] The two steel plates are welded to the bottom of the bearing box, and each is provided with eight bolt holes identical to those at the bottom of the roller support frames for connecting the roller support frames.

[0008] The four fixing steel plates are provided with convex surfaces in the middle and bolt holes on the flat surfaces at both ends, and are connected to the roller support frames by bolts.

[0009] The bolts are hexagon bolts, and a total of thirty-two are provided, respectively arranged on the roller support frames. Each of the two roller support frames is provided with sixteen, eight for fixing the roller support frame and the steel plate, four for connecting the stay bars, and four for fixing the rolling bearing.

[0010] The rollers are bakelite rollers, provided in two, connected to the roller support frames through rolling bearings, and arranged at both ends under the rotor.

[0011] Use a jack to lift the rotor, install a dial indicator for monitoring, record this reading. The lifting height should not be too high to prevent damage. Place the roller support frames on the steel plates welded to the bottom of the bearing box and fix them with bolts. After fixing the roller support frames on both sides, use stay bars to connect the two roller support frames. The rollers connected to the rolling bearings can roll freely. The height of the rollers is adjusted by adding shims in the grooves of the roller support frames to achieve the effect of supporting the rotor. Slowly loosen the jack. At this time, monitor the dial indicator to make the rotor slowly fall on the rollers. When the rotor completely falls on the rollers, the jack is not stressed. It is required that the reading of the dial indicator returns to the reading before the rotor is lifted. If the reading of the dial indicator is less than the original data, it means the rotor has sunk. The rotor needs to be lifted again, and shims are added in the grooves of the roller support frames to adjust the height until the jack is not stressed and the reading is the same as the original data. After confirming that the rotor has no sinking, remove the jack.

[0012] The positive and beneficial effects of the present utility model are:

[0013] 1. The present utility model is composed of a rotor, a bearing box, rollers, roller support frames, rolling bearings, bolts, steel plates, etc. It has a simple structure and is easy to operate. It can realize the operation in the synchronous condenser mode and the normal turning of the rotor on the steam turbine side under the single-bearing support state of the rotor.

[0014] 2. The rollers of the present utility model adopt bakelite rollers, which avoid the wear of the rotor caused by friction between the rotor and the rollers during high-speed operation.

[0015] 3. The present utility model supports the two ends of the rotor body with two rollers, and the roller support frame is fixed by bolts, which can realize the lateral fixation of the rotor body and avoid the situation of left and right lateral displacement during its rotation, improving the stability.

[0016] 4. The roller support frames of the present utility model are connected by tie bars and fixed with four bolts. The bottom is connected to the steel plate welded to the bearing box by bolts, and the rolling bearing is also connected to the fixed steel plate by bolts, having high stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the structural schematic diagram of the present utility model;

[0018] Figure 2 is the structural schematic diagram of the components of the present utility model;

[0019] Figure 3 is the front view of the roller support frame of the present utility model;

[0020] Figure 4 is the right view of the roller support frame of the present utility model;

[0021] Figure 5 is the structural schematic diagram of the roller of the present utility model.

[0022] In the figure: 1 - rotor, 2 - bearing box, 3 - roller, 4 - fixed steel plate, 5 - rolling bearing, 6 - roller support frame, 7 - bolt, 8 - steel plate, 9 - tie bar. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the technical solutions of the present utility model will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment: Refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5, An adjustable rotor support device, comprising: a rotor 1, a bearing box 2, rollers 3, a fixed steel plate 4, rolling bearings 5, roller support frames 6, bolts 7, steel plates 8, and tie bars 9. The rotor 1 is connected to the bearing box 2. The steel plate 8 is welded to the bottom of the bearing box 2 at the location where the roller support frame 6 is installed. The rolling bearing 5 is fixed to the roller support frame 6 through the bolt 7 and the fixed steel plate 4. The roller 3 is connected to the rolling bearing 5. The bottom of the roller support frame 6 is fixed to the steel plate 8 welded to the bearing box 2 through the bolt 7. The tie bar 9 is connected to the roller support frame 6 through the bolt 7.

[0025] Two roller support frames 6 are provided, respectively arranged at both ends below the rotor 1, and the bottom is connected to the steel plate 8 welded to the bearing box 2, showing an "H" shape. Grooves are provided in the middle of the tops at both ends, and two bolt holes are provided on each side of the groove for fixing the rolling bearing 5. Four bolt holes are provided in the middle for connecting the tie bar 9. Eight bolt holes are provided at the bottom for connecting the steel plate 8 welded to the bearing box 2. The two roller support frames 6 are connected through the tie bar 9.

[0026] Two steel plates 8 are provided, welded to the bottom of the bearing box 2, and each is provided with eight bolt holes identical to those at the bottom of the roller support frame 6 for connecting the roller support frame 6.

[0027] Four fixed steel plates 4 are provided, with a convex surface in the middle and bolt holes provided on the flat surfaces at both ends, and are connected to the roller support frame 6 through the bolt 7.

[0028] The bolt 7 is a hexagon bolt, and a total of thirty-two are provided, respectively arranged on the roller support frame 6. Each of the two roller support frames 6 is provided with sixteen, eight for fixing the roller support frame 6 and the steel plate 8, four for connecting the tie bar 9, and four for fixing the rolling bearing 5.

[0029] The roller 3 is a bakelite roller, and two are provided, connected to the roller support frame 6 through the rolling bearing 5, and arranged at both ends below the rotor 1.

[0030] Use a jack to lift the rotor 1, install a dial indicator for monitoring, record this reading. The lifting height should not be too high to prevent damage. Place the roller support frame 6 on the steel plate 8 welded to the bottom of the bearing housing 2 and fix it with bolts 7. After fixing the roller support frames 6 on both sides, use the tie bar 9 to connect the two roller support frames 6. The roller 3 connected to the rolling bearing 5 can roll freely. The height of the roller 3 is adjusted by adding shims in the groove of the roller support frame 6 to achieve the effect of supporting the rotor 1. Slowly loosen the jack. At this time, monitor the dial indicator to make the rotor 1 slowly fall onto the roller 3. When the rotor 1 completely falls onto the roller 3, the jack is not under force. It is required that the dial indicator reading returns to the reading before the rotor 1 is lifted. If the dial indicator reading is less than the original data, it means the rotor 1 has sunk. The rotor 1 needs to be lifted again, and shims are added in the groove of the roller support frame 6 to adjust the height until the jack is not under force and the reading is the same as the original data. After confirming that the rotor 1 has no sinking, remove the jack.

[0031] The utility model is composed of a rotor, a bearing housing, rollers, roller support frames, rolling bearings, bolts, steel plates, etc. It has a simple structure and is easy to operate. It can realize the operation in the synchronous condenser mode and the normal turning of the rotor on the steam turbine side under the single-bearing support state of the rotor. The rollers are made of bakelite rollers, which avoid the wear of the rotor caused by the friction between the rotor and the rollers during high-speed rotation. Two rollers are arranged at both ends of the rotor main body for support, and the roller support frames are fixed by bolts, which can realize the lateral fixation of the rotor main body and avoid the situation of left and right lateral displacement during its rotation, improving the stability. The roller support frames are connected by tie bars and fixed with four bolts. The bottom is connected to the steel plate welded to the bearing housing by bolts, and the rolling bearings are also connected to the fixed steel plate by bolts, with high stability.

Claims

1. An adjustable rotor support device, characterized in that: The described adjustable rotor support device includes: a rotor (1), a bearing box (2), rollers (3), a fixed steel plate (4), rolling bearings (5), roller support frames (6), bolts (7), steel plates (8), and tie bars (9). The rotor (1) is connected to the bearing box (2). The steel plate (8) is welded to the bottom of the bearing box (2) at the location where the roller support frame (6) is installed. The rolling bearings (5) are fixed to the roller support frames (6) through bolts (7) and the fixed steel plate (4). The rollers (3) are connected to the rolling bearings (5). The bottom of the roller support frames (6) is fixed to the steel plate (8) welded to the bearing box (2) through bolts (7). The tie bars (9) are connected to the roller support frames (6) through bolts (7).

2. An adjustable rotor support device according to claim 1, characterized in that: The roller support frames (6) are provided in two, respectively arranged at both ends below the rotor (1), and the bottom is connected to the steel plate (8) welded to the bearing box (2), presenting an "H" shape. Grooves are provided in the middle of the top of both ends, and two bolt holes are provided on each side of the grooves for fixing the rolling bearings (5). Four bolt holes are provided in the middle for connecting the tie bars (9). Eight bolt holes are provided at the bottom for connecting the steel plate (8) welded to the bearing box (2). The roller support frames (6) are connected through the tie bars (9).

3. An adjustable rotor support device according to claim 1, characterized in that: The steel plates (8) are provided in two, welded to the bottom of the bearing box (2), and each is provided with eight bolt holes identical to those at the bottom of the roller support frames (6) for connecting the roller support frames (6).

4. An adjustable rotor support device according to claim 1, characterized in that: The fixed steel plates (4) are provided in four, with a convex surface in the middle and bolt holes provided on the flat surfaces at both ends, and are connected to the roller support frames (6) through bolts (7).

5. An adjustable rotor support device according to claim 1, characterized in that: The bolts (7) are hexagon bolts, a total of thirty-two are provided, respectively arranged on the roller support frames (6), sixteen are provided on each of the two roller support frames (6), eight are used to fix the roller support frames (6) and the steel plate (8), four are used to connect the tie bars (9), and four are used to fix the rolling bearings (5).

6. An adjustable rotor support device according to claim 1, characterized in that: The rollers (3) are bakelite rollers, provided in two, connected to the roller support frames (6) through the rolling bearings (5), and arranged at both ends below the rotor (1).

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