A synchronous condenser rotor

Abstract

The utility model relates to rotor technical field discloses a kind of synchronous phase modifier rotors, including rotor core, shaft, rotor core is detachably connected with shaft, wherein, the shaft includes first end shaft body, second end shaft body, several connecting shaft bodies, each connecting shaft body is detachably connected between first end shaft body and second end shaft body. Through the above technical scheme, the problem of the rotor of the slender shaft structure in the prior art is difficult to manufacture.

Description

Technical Field

[0001] This utility model relates to the field of rotor technology, and in particular to a synchronous condenser rotor. Background Technology

[0002] Synchronous condensers typically refer to a type of synchronous motor operating under special conditions. They are mainly used in power systems to provide or absorb reactive power in order to regulate grid voltage and improve the power factor.

[0003] Currently, in order to reduce the centrifugal force of some synchronous condensers that require high-speed operation, their rotors, especially the rotor shaft, are usually designed as slender structures, that is, the ratio of the overall length of the rotor shaft to its diameter is large. This makes them more difficult to manufacture, which in turn leads to higher production costs for synchronous condensers, and ultimately results in higher construction costs for systems that require synchronous condensers. Utility Model Content

[0004] The main purpose of this invention is to provide a synchronous condenser rotor, which aims to solve the problem of the difficulty in manufacturing rotors with slender shaft structures in related technologies.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A synchronous condenser rotor includes a rotating core and a rotating shaft. The rotating core and the rotating shaft are detachably connected. The rotating shaft includes a first end shaft, a second end shaft, and a plurality of connecting shafts. Each of the connecting shafts is detachably connected between the first end shaft and the second end shaft.

[0007] Furthermore, a first connecting block is provided on one end of the first end shaft that is close to the second end shaft, and a second connecting block and a second connecting hole for embedding the first connecting block or the second connecting block are respectively provided on both ends of each connecting shaft. A first connecting hole for embedding the first connecting block or the second connecting block is provided on one end of the second end shaft that is close to the first end shaft.

[0008] Furthermore, the projection surfaces of the first connecting block and each of the second connecting blocks in the axial direction of the rotation axis are all polygonal structures.

[0009] Furthermore, the first connecting block and each of the second connecting blocks are provided with fixing holes, and the first connecting holes and each of the second connecting holes are provided with mating holes. A fastener for fixing the two is provided between each fixing hole and the mating hole.

[0010] Furthermore, the first connecting block and each of the second connecting blocks have a plurality of fixing holes, and the first connecting holes and each of the second connecting holes have a plurality of mating holes, and each fixing hole and each mating hole are evenly distributed around the axis of rotation.

[0011] Furthermore, the distance between the end of each fixing member away from the central axis of the rotating shaft and the central axis of the rotating shaft is less than the distance between the radial surface of the rotating shaft and the central axis of the rotating shaft.

[0012] Furthermore, the first end shaft, the second end shaft, and several connecting shafts are each provided with retaining rings and annular grooves for embedding the retaining rings, and each of the fixing members abuts against the inner ring of each retaining ring.

[0013] Furthermore, the outer ring diameter of the retaining ring is smaller than the diameter of the rotating shaft.

[0014] Furthermore, all of the aforementioned mating holes are countersunk holes.

[0015] Furthermore, each of the aforementioned fasteners is threadedly connected to each of the respective fastening holes.

[0016] The working principle and beneficial effects of this utility model are as follows:

[0017] This utility model's technical solution addresses the problem of workpiece deformation during the machining of slender shafts by dividing the traditional shaft into several shaft bodies. This eliminates the need to machine the entire shaft structure, thus fundamentally reducing the machining difficulty of the shaft.

[0018] Specifically, the rotating shaft in this utility model mainly includes a first end shaft, a second end shaft, and several connecting shafts. Each connecting shaft can be detachably connected between the first end shaft and the second end shaft and arranged sequentially along a linear direction. That is, when installing and assembling the rotating shaft, the number of connecting shafts to be installed can be determined according to the length requirements of the rotating shaft, which effectively improves the flexibility of use of this utility model. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0021] Figure 2 This is a schematic diagram of the shaft structure in this embodiment;

[0022] Figure 3 for Figure 2 A sectional view;

[0023] Figure 4 for Figure 3 Enlarged view of a portion of point A in the middle;

[0024] Figure 5 This is an exploded view of the rotating shaft in this embodiment.

[0025] Explanation of icon numbers:

[0026] 1. Rotating core; 2. Rotating shaft; 21. First end shaft body; 22. Second end shaft body; 23. Connecting shaft body; 31. First connecting block; 32. First connecting hole; 33. Second connecting block; 34. Second connecting hole; 35. Fixing hole; 36. Mating hole; 37. Annular groove; 4. Fixing component; 5. Snap ring.

[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0029] like Figure 1 As shown in the figure, this embodiment proposes a synchronous condenser rotor, which mainly includes a rotor core 1 and a rotor shaft 2. The rotor core 1 and the rotor shaft 2 are detachably connected, and the rotor core 1 includes a number of iron core sheets and other components. The specific structure of the rotor core 1 should be determined according to the actual operating intensity of the synchronous condenser, which will not be described in detail in this embodiment.

[0030] The rotating shaft 2 mainly comprises a first end shaft 21, a second end shaft 22, and several connecting shafts 23. Each connecting shaft 23 is detachably connected between the first end shaft 21 and the second end shaft 22. In other words, the rotating shaft 2 is constructed by assembling the first end shaft 21, the second end shaft 22, and the connecting shafts 23. Therefore, during the processing and production of the rotating shaft 2, it is unnecessary to process the entire rotating shaft 2 structure. Instead, the first end shaft 21, the second end shaft 22, and the connecting shafts 23 can be processed separately, and then assembled to obtain the rotating shaft 2. This fundamentally solves the problem of easy deformation of the workpiece (rotating shaft 2) when processing slender shafts (rotating shaft 2), thereby effectively reducing the processing difficulty of the rotating shaft 2.

[0031] Specifically, a first connecting block 31 is provided on the end of the first shaft 21 close to the second shaft 22. Each connecting shaft 23 has a second connecting block 33 and a second connecting hole 34 for inserting either the first connecting block 31 or the second connecting block 33 at both ends. The second shaft 22 has a first connecting hole 32 for inserting either the first connecting block 31 or the second connecting block 33 at the end close to the first shaft 21. Thus, the first shaft 21, each connecting shaft 23, and the second shaft 22 are arranged sequentially along a linear direction and assembled by interlocking with each other. The interlocking relationship between the first shaft 21 and the connecting shaft 23, adjacent connecting shafts 23, and the second shaft 22 and the connecting shaft 23 effectively prevents movement of the components in the radial direction of the rotating shaft 2 after they are in contact with each other. This effectively improves the stability of the overall structure of the rotating shaft 2 during the operation of the synchronous condenser and prevents it from falling apart during operation.

[0032] Meanwhile, when installing and assembling the rotating shaft 2, the number of connecting shafts 23 to be installed can be determined according to the length requirements of the rotating shaft 2, which effectively improves the flexibility of use in this embodiment;

[0033] The projection surfaces of the first connecting block 31 and each of the second connecting blocks 33 in the axial direction of the rotating shaft 2 are all polygonal structures. Thus, after the first end shaft 21, the second end shaft 22, and each connecting shaft 23 cooperate with each other, the rotational motion of the rotating shaft 2 body is ensured to be consistent by rigid contact. That is, the first end shaft 21, the second end shaft 22, and each connecting shaft 23 are linked together, which effectively ensures the stability of the rotational motion of the rotating shaft 2.

[0034] Furthermore, each of the second connecting blocks 33 is provided with a fixing hole 35, and each of the first connecting holes 32 and the second connecting holes 34 is provided with a mating hole 36. Each fixing hole 35 and each mating hole 36 are coaxially arranged in a one-to-one correspondence. Each fixing hole 35 and each mating hole 36 is provided with a fastener 4 for fixing the two. In this embodiment, the fastener 4 is preferably a bolt with a nut or other commonly available threaded fastener, so that if the fastener 4 is lost, a replacement can be quickly found to ensure that the assembly of the rotating shaft 2 can be stably unfolded.

[0035] Correspondingly, each mating hole 36 is a countersunk hole structure, that is, the mating hole 36 is a stepped hole structure, so that the mating hole 36 can provide a contact point for the fastener 4, so that when the worker installs the fastener 4, he can confirm whether the fastener 4 is fixed in place.

[0036] Each fastener 4 is threadedly connected to each fixing hole 35. That is, the fixing effect brought about by the fastener 4 threadedly connected to the fixing hole 35 effectively improves the overall stability of the rotating shaft 2.

[0037] Meanwhile, the first connecting block 31 and each of the second connecting blocks 33 have several fixing holes 35, and the first connecting hole 32 and each of the second connecting holes 34 have several mating holes 36. The fixing holes 35 and the mating holes 36 are evenly distributed around the rotating shaft 2. Because the evenly distributed fixing components (fixing holes 35, mating holes 36, and fixing parts 4) can make the fastening force symmetrically distributed, avoiding the shaft from being eccentric or bending due to unilateral force (especially suitable for high-speed rotation scenarios); the evenly distributed design can suppress periodic vibration caused by asymmetrical fastening, reduce noise and fatigue damage, thereby further improving the overall stability of the rotating shaft 2.

[0038] Preferably, in this embodiment, the number of fixed components in the row should be consistent with the number of edges (polygonal edges) of the first connecting block 31 or the second connecting block 33. That is, each edge of the polygonal connecting block (such as a hexagon or a quadrilateral) corresponds to one fixed component, so that the fastening force is directly applied to the polygonal corner area, avoiding stress concentration caused by the suspended force in the middle of the edge.

[0039] The distance between the end of each fixing component 4 furthest from the central axis of the rotating shaft 2 and the central axis of the rotating shaft 2 is less than the distance between the radial surface of the rotating shaft 2 and the central axis of the rotating shaft 2. That is, the head of each fixing component 4 is embedded in each mating hole 36, ensuring that the outer surface of the rotating shaft 2 is flat, thereby avoiding the need to open clearance grooves on the iron core sheet and reducing unnecessary processing and processing costs.

[0040] The first end shaft 21, the second end shaft 22, and several connecting shafts 23 are each provided with retaining rings 5 ​​and annular grooves 37 for inserting the retaining rings 5. Each annular groove 37 is connected to a mating hole 36 located on the same shaft (first end shaft 21, second end shaft 22, connecting shaft 23). Thus, after the retaining ring 5 is inserted into the annular groove 37, each fixing member 4 abuts against the inner ring of each retaining ring 5, thereby pressing down each fixing member 4 with the retaining ring 5, effectively preventing each fixing member 4 from coming out of the fixing hole 35 during the operation of the synchronous synchro. Similarly, the inner ring of the rotating core 1 abuts against the outer ring of each retaining ring 5, effectively preventing the retaining ring 5 from coming out of the annular groove 37 during the operation of the synchronous synchro.

[0041] The outer diameter of the retaining ring 5 is smaller than the diameter of the rotating shaft 2, so as to avoid the presence of the retaining ring 5 damaging the outer surface of the rotating shaft 2 and affecting the normal installation of the iron core sheet (rotating core 1).

[0042] In this embodiment, the retaining ring 5 is preferably formed by welding the ends of a metal wire rope with high-temperature resistance together. The installation process is as follows: after placing the metal wire rope into the annular groove 37, its ends are welded together to form an annular structure. The specific installation process of the retaining ring 5 depends on the type selected and will not be elaborated in this embodiment.

[0043] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0044] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A synchronous condenser rotor, comprising a rotor core (1) and a rotor shaft (2), wherein the rotor core (1) and the rotor shaft (2) are detachably connected, characterized in that, The rotating shaft (2) includes a first end shaft (21), a second end shaft (22), and a plurality of connecting shafts (23), each of which can be detachably connected between the first end shaft (21) and the second end shaft (22).

2. The synchronous condenser rotor according to claim 1, characterized in that, The first end shaft (21) is provided with a first connecting block (31) at one end close to the second end shaft (22). Each of the connecting shafts (23) is provided with a second connecting block (33) and a second connecting hole (34) for the first connecting block (31) or the second connecting block (33) to be inserted at both ends. The second end shaft (22) is provided with a first connecting hole (32) for the first connecting block (31) or the second connecting block (33) to be inserted at one end close to the first end shaft (21).

3. The synchronous condenser rotor according to claim 2, characterized in that, The projection surfaces of the first connecting block (31) and each of the second connecting blocks (33) in the axial direction of the rotating shaft (2) are all polygonal structures.

4. The synchronous condenser rotor according to claim 2, characterized in that, The first connecting block (31) and each of the second connecting blocks (33) are provided with fixing holes (35), the first connecting hole (32) and each of the second connecting holes (34) are provided with mating holes (36), and a fastener (4) for fixing the two is provided between each fixing hole (35) and mating hole (36).

5. The synchronous condenser rotor according to claim 4, characterized in that, The first connecting block (31) and each of the second connecting blocks (33) have a plurality of fixing holes (35), and the first connecting hole (32) and each of the second connecting holes (34) have a plurality of mating holes (36). The fixing holes (35) and each mating hole (36) are evenly distributed around the rotating shaft (2).

6. The synchronous condenser rotor according to claim 4 or 5, characterized in that, The distance between the end of each of the fixing members (4) away from the central axis of the rotating shaft (2) and the central axis of the rotating shaft (2) is less than the distance between the radial surface of the rotating shaft (2) and the central axis of the rotating shaft (2).

7. The synchronous condenser rotor according to claim 6, characterized in that, The first end shaft (21), the second end shaft (22), and several connecting shafts (23) are each provided with a retaining ring (5) and an annular groove (37) for embedding the retaining ring (5). Each of the fixing members (4) abuts against the inner ring of each retaining ring (5).

8. The synchronous condenser rotor according to claim 7, characterized in that, The outer diameter of the retaining ring (5) is smaller than the diameter of the rotating shaft (2).

9. The synchronous condenser rotor according to claim 4 or 5, characterized in that, All of the aforementioned mating holes (36) are countersunk holes.

10. The synchronous condenser rotor according to claim 4 or 5, characterized in that, Each of the aforementioned fasteners (4) is threadedly connected to each of the fixing holes (35).

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