An exciter rotor support

Abstract

The utility model relates to the technical field of support, specifically relates to a kind of exciter rotor support, comprising: semicircular type supporting block, semicircular type supporting hole is equipped in axle center;Guide shoe, it is installed in the semicircular type supporting hole, for supporting exciter rotor, the lifting eye for providing hoisting point is symmetrically installed on the guide shoe;Multiple positioning screw rod, plug-in is installed on the semicircular type supporting block and is threadedly installed on exciter bearing seat;The exciter rotor support can be applicable to the rotor support of multiple diameters by being equipped with semicircular type supporting block and detachable guide shoe, can stably and conveniently support exciter rotor, facilitate disc to move when exciter rotor overhauls;The device can reliably and effectively support protection exciter rotor, avoid damaging rotor axle journal in the process of disc to move rotor.

Description

Technical Field

[0001] This utility model relates to the field of support technology, specifically to an exciter rotor support. Background Technology

[0002] The exciter is a core piece of equipment in a thermal power plant. As the "nerve center" of the power plant, it not only ensures the efficient conversion of electrical energy, but is also the core control unit for grid voltage stability and dynamic response.

[0003] Currently, most exciter rotors are connected to the generator at one end via a coupling, and the other end is supported by a bearing. Therefore, the rotor is supported by only a single bearing. The advantage of this structure is that it reduces the number of support bearings in thermal power plant generator sets, effectively reducing the unit construction cost. The disadvantage is that the exciter requires high-level technology for maintenance and is difficult to maintain. When the exciter rotor needs maintenance, the upper part of the exciter support bearing must first be removed, and then the exciter rotor is raised by 0.05-0.10mm to remove the lower bearing. During routine maintenance, jacks are often used to raise the exciter rotor. This method is unstable and can easily damage the rotor journal surface. Furthermore, when removing the bearing, there is a risk of accidentally damaging the bearing.

[0004] When reassembling the exciter rotor, the machine needs to be shut down to check the rotor shaft head free runout (required to be ≤0.63mm). To restore the shaft head free runout, the rotor needs to be rotated, and the rotor must be in a free state before the bearings can be reinstalled. The conventional maintenance method is to use a crane to suspend the rotor for rotation. However, during the rotation process, the lack of an effective rotor support structure makes the rotation process difficult. Therefore, we propose an exciter rotor support to address the difficulty of rotating the rotor when restoring the shaft head free runout. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings mentioned in the background section and provide an exciter rotor support.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: An exciter rotor support, comprising: A semi-circular support block with a semi-circular support hole at its center; Guide plates are installed at the semi-circular support holes to support the exciter rotor. Lifting rings for providing lifting points are symmetrically installed on the guide plates. Multiple positioning screws are inserted into the semi-annular support block and threaded onto the exciter bearing seat.

[0007] Preferably, the semi-annular support block has a raised edge at its outer edge, and the raised edge has a plurality of evenly distributed and symmetrically arranged insertion holes along the axis, and the positioning screw is inserted into the insertion holes.

[0008] Preferably, at least two symmetrically arranged springs are fitted on the plurality of positioning screws, and the springs are disposed between the semi-annular support block and the exciter bearing seat.

[0009] Preferably, the semi-circular support hole is provided with a threaded hole, and the guide plate is detachably installed at the semi-circular support hole by screws.

[0010] Preferably, the guide plate adopts a ring plate structure that is coaxially arranged with the semi-circular support hole.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. The exciter rotor support, with its semi-annular support block and detachable guide plate, can be adapted to support rotors of various diameters, providing stable and convenient support for the exciter rotor and facilitating rotor rotation during maintenance. 2. This device can reliably and effectively support and protect the exciter rotor, preventing damage to the rotor journal during rotor rotation. Attached Figure Description

[0012] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings: Figure 1 This is one of the schematic diagrams of the overall structure of this utility model; Figure 2 This is the second schematic diagram of the overall structure of this utility model; Figure 3 This is an exploded view of the overall structure of this utility model; Figure 4 The following are front and side views of the installation of an embodiment of this utility model.

[0013] The meanings of the labels in the diagram are as follows: 1. Guide plate; 2. Semi-circular support block; 201. Semi-circular support hole; 202. Threaded hole; 203. Insertion hole; 21. Raised edge; 3. Lifting ring; 4. Positioning screw; 5. Spring. Detailed Implementation

[0014] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0015] Please see Figures 1-4 The present invention will describe the above technical solution in detail through the following embodiments: This embodiment uses the exciter rotor support of a multi-functional 1000MW unit as an example. During maintenance, the rotor needs to be inspected, and this support device is used as an example. Figure 4 The illustrated embodiment is shown in the diagram.

[0016] Specifically, including: Semi-ring type support block 2, such as Figures 1-3 The structure shown has a raised edge 21 on the outer edge of the semi-annular support block 2, six evenly distributed and symmetrically arranged insertion holes 203 on the raised edge 21, a semi-circular support hole 201 at the axis, and a threaded hole 202 on the hole wall of the semi-circular support hole 201. To facilitate fitting the rotor diameter, a guide plate 1 is installed at the semi-circular support hole 201 in this embodiment. The guide plate 1 is detachably installed at the semi-circular support hole 201 by screws, which makes it easy to adjust the guide plate 1 of different thickness specifications according to different rotor diameters.

[0017] In this embodiment, lifting rings 3 for providing lifting points are symmetrically installed on the guide plate 1 to obtain, as shown in the figure. Figure 4 The installation method shown is as follows; however, during the process of rotating the rotor, the device is prone to swaying during suspension; therefore, a positioning screw 4 is inserted into the insertion hole 203, and the front end of the positioning screw 4 is threaded onto the exciter bearing seat.

[0018] This implementation example Figures 1-3 As shown, springs 5 ​​are respectively fitted on the two sets of positioning screws 4 on the upper and lower sides, and the springs 5 ​​are positioned between the semi-annular support block 2 and the exciter bearing seat. The working principle of the exciter rotor bracket in this embodiment is as follows: when the rotor free sway is restored by rotation, the flat side of the bracket is installed facing the bearing seat, and the positioning screws 4 are used to install it on the bearing seat to complete the connection. The device is flexibly connected to the bearing seat through the springs 5. In this way, the exciter rotor can be supported, and the rotor can be automatically compensated to be in a free state, which is convenient for detecting the rotor status.

[0019] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0020] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. An exciter rotor support, characterized in that: include: A semi-circular support block (2) has a semi-circular support hole (201) at its axis. The guide plate (1) is installed at the semi-circular support hole (201) to support the exciter rotor. The guide plate (1) is symmetrically equipped with lifting rings (3) for providing lifting points. Multiple positioning screws (4) are inserted into the semi-annular support block (2) and threaded onto the exciter bearing seat.

2. The exciter rotor support as described in claim 1, characterized in that: The semi-annular support block (2) has a raised edge (21) on its outer edge. The raised edge (21) has a plurality of evenly distributed and symmetrically arranged insertion holes (203) along the axis. The positioning screw (4) is inserted into the insertion hole (203).

3. The exciter rotor support as described in claim 2, characterized in that: At least two symmetrically arranged springs (5) are fitted on the plurality of positioning screws (4), and the springs (5) are arranged between the semi-annular support block (2) and the exciter bearing seat.

4. The exciter rotor support as described in claim 1, characterized in that: The semi-circular support hole (201) is provided with a threaded hole (202), and the guide plate (1) is detachably installed at the semi-circular support hole (201) by screws.

5. The exciter rotor support as described in claim 1, characterized in that: The guide plate (1) adopts a ring plate structure that is coaxial with the semi-circular support hole (201).

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