Continuous force shaft for rotor hoisting

Abstract

The utility model relates to an assembly for a rotor hoisting tool. A continuous force shaft for rotor hoisting comprises a cylindrical shaft, the left end of the shaft is provided with a first flange extending outwards, and first bolt holes are formed in the first flange at equal intervals; the right end of the shaft is provided with a second flange extending outwards, a second bolt hole is formed in the position, right opposite to the first bolt hole, of the second flange, the distance between the second bolt hole and the central axis of the shaft is equal to the distance between the first bolt hole and the shaft, the left end face of the shaft is provided with a first groove recessed inwards, and the right end face of the shaft is provided with a second groove recessed inwards. A first protrusion protruding outwards is arranged on the right end face of the shaft, and the outer contour of the first protrusion is matched with the inner contour of the first groove. When the length of the rotor hoisting tool is not enough, the rotor hoisting tool can be connected with the existing rotor hoisting tool by using the rotor hoisting tool, so that the length of the rotor hoisting tool is increased.

Description

Technical Field

[0001] This utility model relates to the field of nuclear power generation equipment, and in particular to components for rotor hoisting tools. Background Technology

[0002] When assembling and disassembling the rotor and stator of a large motor in a small factory, a horizontal assembly and disassembly method is generally used. Horizontal assembly and disassembly can be carried out in spaces with limited height, avoiding the complex operation of vertical lifting and lowering, which is suitable for environments with limited space.

[0003] When assembling or disassembling the rotor laterally from the stator, the rotor is usually lifted and inserted into the stator. When the rotor shaft is short, the end of the rotor shaft cannot exit through the stator after the rotor is inserted laterally, making lifting difficult. Utility Model Content

[0004] In view of the problems existing in the prior art, the present invention is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution;

[0006] A rotor hoisting support shaft includes a cylindrical shaft, the left end of which is provided with an outwardly extending first flange, and the first flange has first bolt holes at equal intervals.

[0007] The right end of the shaft is provided with an outwardly extending second flange. The second flange has a second bolt hole at a position directly opposite the first bolt hole. The distance from the second bolt hole to the central axis of the shaft is equal to the distance from the first bolt hole to the shaft.

[0008] The left end face of the shaft has an inwardly recessed first groove, and the right end face of the shaft has an outwardly protruding first protrusion, the outer contour of the first protrusion matching the inner contour of the first groove.

[0009] First, when the length of the rotor lifting tool is insufficient, this invention can be used to connect existing rotor lifting tools to increase their length. Second, this invention enables the connection between rotor lifting support shafts through flanges and bolt holes. This allows the final length of the rotor lifting tool to be selected by choosing the number of connected rotor lifting support shafts, thereby meeting different lifting requirements. Third, this invention provides a first groove on the left end face of the shaft and a first protrusion on the right end face. The first protrusion can be inserted into the first groove, thereby increasing the structural strength of the connection when two rotor lifting support shafts are connected.

[0010] Preferably, a second protrusion protrudes outwardly to the bottom of the first groove, and a second groove is formed inwardly on the first protrusion. The outer contour of the second protrusion matches the inner contour of the second groove. This utilizes the second groove and the second protrusion to further increase the connection strength between the rotor hoisting and the drive shaft.

[0011] Preferably, the second protrusion is conical in shape, while the first protrusion is polygonal. This allows the second protrusion to guide the direction of the rotor hoisting drive shaft, and the first protrusion to restrict the relative position between the two rotor hoisting drive shafts, preventing them from rotating relative to each other.

[0012] Preferably, the distance from the outer edge of the second flange to the central axis of the shaft is greater than the distance from the outer edge of the first flange to the central axis of the shaft. The second flange also has a third bolt hole, the distance from which the third bolt hole is located is greater than the distance from the second bolt hole to the central axis of the shaft. This allows for the connection of the second flange and the third bolt hole to a non-rotor lifting drive shaft, or to existing rotor lifting tools of different sizes, to meet a wider range of usage requirements.

[0013] Preferably, a first reinforcing plate is provided at equal intervals between the first flange and the shaft, and a second reinforcing plate is provided at equal intervals between the second flange and the shaft. The first reinforcing plate has a first opening, and the second reinforcing plate has a second opening. This increases the strength of the shaft using the reinforcing plates and allows the openings to be used as lifting points, making the rotor's lifting position more flexible.

[0014] Preferably, the distance from the first opening on each of the first reinforcing plates to the central axis of the shaft is different, and the distance from the second opening on each of the second reinforcing plates to the central axis of the shaft is different. This allows for the selection of different lifting points to adjust the lifting height of the rotor lifting drive shaft.

[0015] Preferably, a first bolt hole is provided between two adjacent first reinforcing plates, and a second bolt hole is provided between two adjacent second reinforcing plates. This ensures structural strength.

[0016] Preferably, the first reinforcing plate and the second reinforcing plate are directly opposite each other, and the distance from the first opening on the first reinforcing plate to the central axis of the shaft is equal to the distance from the second opening on the second reinforcing plate (opposite to the first reinforcing plate) to the central axis of the shaft. Therefore, when selecting the openings on the two opposite reinforcing plates for hoisting, the central axis of the shaft is located in the horizontal direction. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0018] Figure 1 A schematic diagram of the left-side structure of the rotor hoisting drive shaft according to an embodiment of this utility model;

[0019] Figure 2 A schematic diagram of the right-side structure of the rotor hoisting drive shaft according to one embodiment of this utility model. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more readily understood, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0023] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in less than one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0024] Example 1

[0025] Reference Figure 1 and Figure 2 , a drive shaft for rotor hoisting.

[0026] The shaft includes a cylindrical shaft 1. The left end of the shaft 1 has an outwardly extending first flange 2, on which first bolt holes 21 are equally spaced. The right end of the shaft 1 has an outwardly extending second flange 3, on which a second bolt hole 31 is formed at a position directly opposite to the first bolt hole 21. The distance from the second bolt hole 31 to the central axis 1 of the shaft 1 is equal to the distance from the first bolt hole 21 to the shaft 1. The left end face of the shaft 1 has an inwardly recessed first groove 22, and the right end face of the shaft 1 has an outwardly protruding first protrusion 32, the outer contour of the first protrusion 32 matching the inner contour of the first groove 22.

[0027] First, when the length of the rotor lifting tool is insufficient, this invention can be used to connect existing rotor lifting tools to increase their length. Second, this invention enables the connection between rotor lifting support shafts 1 through flanges and bolt holes. This allows the final length of the rotor lifting tool to be selected by choosing the number of rotor lifting support shafts 1 connected, thereby meeting different lifting requirements. Third, this invention provides a first groove 22 on the left end face of shaft 1 and a first protrusion 32 on the right end face. The first protrusion 32 can be inserted into the first groove 22, thereby increasing the structural strength of the connection when two rotor lifting support shafts 1 are connected.

[0028] A second protrusion 23 protrudes outwardly from the bottom of the first groove 22. A second groove 33 is recessed inwardly from the first protrusion 32. The outer contour of the second protrusion 23 matches the inner contour of the second groove 33. Thus, the second groove 33 and the second protrusion 23 further increase the connection strength between the rotor hoisting and the drive shaft 1.

[0029] The second protrusion 23 is conical in shape, while the first protrusion 32 is polygonal. Thus, the second protrusion 23 guides the direction of the rotor hoisting support shaft 1, and the first protrusion 32 restricts the relative position between the two rotor hoisting support shafts 1, preventing them from rotating relative to each other.

[0030] The distance from the outer edge of the second flange 3 to the center axis 1 of the shaft 1 is greater than the distance from the outer edge of the first flange 2 to the center axis 1 of the shaft 1. The second flange 3 also has a third bolt hole 34, the distance from which the third bolt hole 34 to the center axis 1 of the shaft 1 is greater than the distance from the second bolt hole 31 to the center axis 1 of the shaft 1. Thus, the second flange 3 and the third bolt hole 34 can be used to connect to the non-rotor hoisting drive shaft 1, or to connect to existing rotor hoisting tools of different sizes, to meet more usage needs.

[0031] In use, the rotor is first lifted from its center of gravity, and then inserted into the stator. The shaft 1 connected to the rotor can extend from the stator, thus supporting or lifting the rotor from both ends. The lifting device at the rotor's center of gravity can be removed, so that when the length of the rotor lifting tool is insufficient, the existing rotor lifting tool can be connected using the shaft 1 to increase the length of the rotor lifting tool. By selecting the number of connecting rotor lifting support shafts 1, the final length of the rotor lifting tool can be selected, thereby meeting different length lifting requirements.

[0032] Example 2

[0033] Reference Figure 1 and Figure 2 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0034] A first reinforcing plate 4 is provided at equal intervals between the first flange 2 and the shaft 1, and a second reinforcing plate 5 is provided at equal intervals between the second flange 3 and the shaft 1. The first reinforcing plate 4 has a first opening 41, and the second reinforcing plate 5 has a second opening 51. This increases the strength of the shaft 1 using the reinforcing plates and allows the openings to be used as lifting points, making the lifting position of the rotor more flexible.

[0035] The distances from the first opening 41 on each of the first reinforcing plates 4 to the central axis 1 of the shaft 1 are different, and the distances from the second opening 51 on each of the second reinforcing plates 5 to the central axis 1 of the shaft 1 are also different. This allows for the selection of different lifting points to adjust the lifting height of the rotor lifting drive shaft 1.

[0036] A first bolt hole 21 is provided between two adjacent first reinforcing plates 4, and a second bolt hole 31 is provided between two adjacent second reinforcing plates 5. This ensures structural strength.

[0037] The first reinforcing plate 4 and the second reinforcing plate 5 are directly opposite each other. The distance from the first opening 41 on the first reinforcing plate 4 to the central axis 1 of the shaft 1 is equal to the distance from the second opening 51 on the second reinforcing plate 5 (which is directly opposite the first reinforcing plate 4) to the central axis 1 of the shaft 1. Therefore, when selecting the openings on the two directly opposite reinforcing plates for hoisting, the central axis 1 of the shaft 1 is located in the horizontal direction.

[0038] In use, the strength of the shaft 1 is increased by the first reinforcing plate 4 and the second reinforcing plate 5, and the opening is allowed as a lifting point, making the lifting position of the rotor more flexible. Different reinforcing plates and different lifting points can be selected to adjust the lifting height of the rotor lifting shaft 1.

[0039] It should be noted that the above description illustrates the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A drive shaft for rotor hoisting, characterized in that: It includes a cylindrical shaft, the left end of which is provided with an outwardly extending first flange, and the first flange has first bolt holes at equal intervals. The right end of the shaft is provided with an outwardly extending second flange. The second flange has a second bolt hole at a position directly opposite the first bolt hole. The distance from the second bolt hole to the central axis of the shaft is equal to the distance from the first bolt hole to the shaft. The left end face of the shaft has an inwardly recessed first groove, and the right end face of the shaft has an outwardly protruding first protrusion, the outer contour of the first protrusion matching the inner contour of the first groove.

2. The rotor hoisting drive shaft according to claim 1, characterized in that: The bottom of the first groove is connected to a second protrusion that protrudes outward, and the first protrusion has a second groove that is recessed inward. The outer contour of the second protrusion matches the inner contour of the second groove.

3. The rotor hoisting drive shaft according to claim 2, characterized in that: The second protrusion is conical in shape, while the first protrusion is polygonal in shape.

4. The rotor hoisting drive shaft according to claim 1, characterized in that: The distance from the outer edge of the second flange to the central axis of the shaft is greater than the distance from the outer edge of the first flange to the central axis of the shaft. The second flange also has a third bolt hole, and the distance from the third bolt hole to the central axis of the shaft is greater than the distance from the second bolt hole to the central axis of the shaft.

5. The rotor hoisting drive shaft according to claim 1, characterized in that: A first reinforcing plate is provided at equal intervals between the first flange and the shaft, and a second reinforcing plate is provided at equal intervals between the second flange and the shaft. A first opening is provided on the first reinforcing plate, and a second opening is provided on the second reinforcing plate.

6. The rotor hoisting drive shaft according to claim 5, characterized in that: The distance from the first opening on each of the first reinforcing plates to the central axis of the shaft is different, and the distance from the second opening on each of the second reinforcing plates to the central axis of the shaft is different.

7. The rotor hoisting drive shaft according to claim 5, characterized in that: A first bolt hole is provided between two adjacent first reinforcing plates, and a second bolt hole is provided between two adjacent second reinforcing plates.

8. The rotor hoisting drive shaft according to claim 6, characterized in that: The first reinforcing plate and the second reinforcing plate are directly opposite each other. The distance from the first opening on the first reinforcing plate to the central axis of the shaft is equal to the distance from the second opening on the second reinforcing plate, which is directly opposite the first reinforcing plate, to the central axis of the shaft.

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