A T-shaped and L-shaped positioning device used in cooperation

Abstract

The application discloses a T-shaped and L-shaped positioning device used in cooperation, and belongs to the technical field of three-phase permanent magnet shaft generator positioning. The T-shaped and L-shaped positioning device used in cooperation comprises a T-shaped block and an L-shaped block which are arranged between a generator rotor and a stator, wedge-shaped protruding parts are arranged on the T-shaped block and the L-shaped block, stator mounting holes are arranged on the T-shaped block and the L-shaped block, a rotor mounting hole is arranged on the T-shaped block, and a jackscrew hole is arranged at the abutting position of the T-shaped block and the rotor; the wedge-shaped protruding parts on the T-shaped block and the L-shaped block are embedded into air gaps, thereby effectively limiting the radial displacement of the rotor; an auxiliary L-shaped block is additionally arranged under the rotor, and connecting cross bars are arranged between adjacent T-shaped blocks and used for fixation; at the critical moment when the support area of the rotor is reduced due to the disengagement and movement of the rotor, the support area of the bottom of the rotor is increased, the drooping trend of the rotor is effectively inhibited, and the stability and safety of the disengagement process are ensured.

Description

Technical Field

[0001] This invention relates to the field of positioning technology for three-phase permanent magnet shaft-driven generators, and particularly to a T-type and L-type positioning device used in conjunction with each other. Background Technology

[0002] Three-phase permanent magnet shaft generators are widely used in fields such as marine power due to their high power density and efficiency. However, the strong magnetic attraction between the stator and rotor poses a serious challenge to assembly, transportation and maintenance. In existing technologies, such as Figures 1 to 4 As shown, a generator mainly consists of a housing, stator, and rotor, with an air gap between them. Traditional assembly and transportation processes typically rely on simple wooden or metal blocks to temporarily fill the air gap to prevent collisions between the stator and rotor due to strong magnetic attraction. However, this method has significant drawbacks in actual operation, especially in maintenance scenarios where the rotor needs to be urgently disconnected from the main shaft. During the axial disengagement of the rotor, as the rotor moves, the contact support area between it and the single-sided positioning block decreases, resulting in an increase in local pressure. Due to gravity, the rotor is very prone to downward radial displacement, which disrupts the uniformity of the air gap. If there is a lack of effective real-time radial support, the displaced rotor will scrape against the stator, causing serious damage to the equipment. After the disengagement operation, the rotor may reset under the action of magnetic force, which threatens the safety of maintenance personnel and is not conducive to subsequent maintenance work. The strong magnetic attraction between the stator and rotor makes it extremely difficult for the wedge-shaped protrusion of the positioning block to be inserted into the air gap, and forcibly striking it can easily damage the iron core. Summary of the Invention

[0003] Therefore, it is necessary to provide a T-type and L-type positioning device that can be used in conjunction with each other to address the above-mentioned technical problems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A T-shaped and L-shaped positioning device for mutual use includes a T-shaped block and an L-shaped block installed between a generator rotor and a stator. Both the T-shaped block and the L-shaped block have wedge-shaped protrusions and stator mounting holes. The T-shaped block has a rotor mounting hole. The L-shaped block is located on the underside of the rotor and is connected between two adjacent T-shaped blocks by a connector. The T-block and the rotor are fitted with a set screw hole, and a set screw is threaded into the set screw hole. The connector includes a connecting crossbar and a connecting U-plate mounted on the connecting crossbar.

[0005] Preferably, the length of the protruding portion on the L-shaped block is greater than that of the protruding portion on the T-shaped block.

[0006] Optionally, when the connecting crossbar is located on one side of the T-block, both ends of the connecting crossbar are installed in the rotor mounting holes of the T-block by bolt threads. An auxiliary mounting hole is provided on the connecting U-plate, and the auxiliary L-block is installed in the auxiliary mounting hole by bolt threads.

[0007] Optionally, when the connecting crossbar is located on one side of the L-shaped block, thickened shims are provided between the two ends of the connecting crossbar and the stator mounting holes of the L-shaped block. The thickened shims are connected to the stator mounting holes and the connecting crossbar by bolt threads. The auxiliary mounting holes of the connecting U-plate are in contact with the rotor end face.

[0008] Furthermore, the auxiliary mounting hole is used to install a set screw.

[0009] Furthermore, the thickened pad is provided with a limiting shaft, which is in contact with the connecting crossbar to prevent the connecting crossbar from shaking.

[0010] Preferably, the protruding portion includes a fixed protruding block near the stator component and a fitting protruding block near the rotor component, with a gap between the fixed protruding block and the fitting protruding block, and an insert plate slidably connected within the gap.

[0011] Furthermore, the fitting protrusion is installed via a bending portion.

[0012] Furthermore, both the stator and rotor components are fitted with mounting blocks via bolt threads, and each mounting block is threaded with an adjusting screw, which rotates within the insert plate.

[0013] Compared with the prior art, the present invention provides a T-type and L-type positioning device that can be used in conjunction with each other, which has the following beneficial effects: The parts not mentioned in this device are the same as or can be implemented using existing technology. This invention effectively limits the radial displacement of the rotor by embedding the wedge-shaped protrusions on the T-blocks and L-blocks into the air gap. By adding auxiliary L-blocks on the underside of the rotor and fixing them with connecting crossbars between adjacent T-blocks, the support area at the bottom of the rotor is increased at the critical moment when the rotor disengages and moves, causing the support area to decrease. This effectively suppresses the downward trend of the rotor and ensures the stability and safety of the disengagement process. The present invention provides a set screw hole and a set screw component on the T-block, which can tighten the rotor end face after the rotor is disengaged and prevent the rotor from resetting. By setting a connector with a thickened shim on one side of the L-block and using a connecting U-plate to fit the rotor end face, the left and right sides of the rotor are clamped and fixed, so that the rotor is in a stable suspended state, which greatly facilitates subsequent maintenance work. This invention achieves elastic deformation insertion of the protruding part by designing the protruding part as a fixed protruding block and a fitting protruding block with an elastic bending part, combined with a sliding insert plate and an adjusting screw. This structure allows the fitting protruding block to be slightly bent into the gap first, and then tightened by screwing in the insert plate. Compared with the traditional hard plugging method, it greatly reduces the installation resistance and avoids scratches on the rotor surface during installation. This invention utilizes a constant torque wrench to uniformly tighten the adjusting screw in the circumferential direction. By observing the difference in feed amount of the insert plate at each position, it is possible to determine whether there is eccentricity in the air gap. If the feed amount on a certain side is significantly smaller, it indicates that the air gap on that side is too small or there is interference. This allows for risk prediction before disengagement and effectively prevents rubbing accidents caused by air gap eccentricity. Attached Figure Description

[0014] Figure 1 This is a right view of the transportation state in this invention; Figure 2 This is a schematic diagram of the L-shaped block in the transfer state in this invention; Figure 3 This is a left view of the transportation state in this invention; Figure 4 This is a schematic diagram of the T-block structure in the transfer state of the present invention; Figure 5 This is a right view of the device in the emergency disengagement state according to the present invention; Figure 6 This is a schematic diagram of the L-shaped block in the emergency disengagement state of the present invention; Figure 7 This is a schematic diagram of the thickened gasket in this invention; Figure 8 This is a left view of the device in its emergency disengagement state according to the present invention; Figure 9 This is a schematic diagram of the T-block in the emergency disengagement state of the present invention; Figure 10 This is a schematic diagram of the connector structure in this invention; Figure 11 This is a schematic diagram of the structure of the T-shaped block and the L-shaped block in this invention; Figure 12 This is a schematic diagram of the structure connecting the U-plate in this invention; Figure 13 This is a schematic diagram of the adjusting screw in this invention.

[0015] In the diagram: 1. Housing; 101. Stator component; 102. Rotor component; 2. T-block; 201. L-block; 202. Fixing protrusion; 203. Fitting protrusion; 204. Bending section; 205. Stator mounting hole; 2051. Rotor mounting hole; 206. Set screw hole; 207. Set screw component; 3. Insert plate; 301. Mounting block; 302. Adjusting screw; 4. Connecting crossbar; 401. Connecting U-plate; 402. Auxiliary mounting hole; 5. Thickened shim; 501. Limiting shaft. Detailed Implementation

[0016] 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.

[0017] Example: A T-type and L-type positioning device used in conjunction with each other, as shown in the reference. Figure 11 It includes T-block 2 and L-block 201. Both T-block 2 and L-block 201 are provided with wedge-shaped protrusions and stator mounting holes 205 are provided on both T-block 2 and L-block 201. T-block 2 is also provided with a separate rotor mounting hole 2051. Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 The three-phase permanent magnet shaft-driven generator mainly consists of an external housing 1, a stator 101 installed inside the housing 1, and a rotor 102 located inside the stator 101 and coaxial with it. A main shaft is installed inside the rotor 102 and connected to the input end. An air gap is provided between the stator 101 and the rotor 102 to reduce rotational friction. The thickness of the wedge-shaped protrusion matches the thickness of the air gap. During the pre-fixation and transport process of installing the rotor 102 inside the stator 101, T-blocks 2 and L-blocks 201 are first installed on the stator 101 using bolts. (Refer to...) Figure 2 Insert the rotor component 102 axially from right to left into the stator component 101, referring to... Figure 4 The rotor 102 is pushed to fit against the T-block 2 on the left side to limit the axial displacement of the rotor 102. Then, the rotor 102 is locked with the T-block 2 by a bolt thread through the rotor mounting hole 2051 to limit the circumferential displacement of the rotor 102. Multiple sets of T-blocks 2 and L-blocks 201 are distributed around the circumference, and their wedge-shaped protrusions are embedded in the air gap to limit the radial displacement of the rotor 102. This structure effectively avoids collision damage to the stator and rotor caused by strong magnetic attraction during transportation and assembly. After the whole machine is assembled, the T-blocks 2 and L-blocks 201 are removed. When it is necessary to urgently disengage the rotor 102 of the three-phase permanent magnet shaft generator from the main shaft, T-block 2 and L-block 201 can be installed on the stator 101, and the protruding part can be inserted into the air gap to limit the radial displacement of the rotor 102. At this time, the rotor 102 can be disengaged from the main shaft. Specifically, refer to Figure 11 A set screw hole 206 is provided at the part where the T-block 2 and the rotor 102 are in contact, and a set screw 207 is threaded into the set screw hole 206; during the disengagement operation, the rotor 102 moves towards the L-block 201. After the disengagement operation, refer to... Figure 5 , Figure 6 , Figure 8 , Figure 9 The hexagonal bolt is screwed into the set screw hole 206 as the set screw part 207 and fits against the end face of the rotor part 102 to restrict the axial displacement of the rotor part 102 and prevent the rotor part 102 from resetting, thus completing the emergency disengagement of the rotor part 102 from the main shaft. It should be noted that during the process of rotor component 102 moving and disengaging to the left, the contact support area between it and the wedge-shaped protrusion of the left T-block 2 decreases and the pressure increases. This causes the rotor to tend to shift downwards, affecting the air gap uniformity and operational stability. Therefore, referring to... Figure 5 , Figure 6 , Figure 8 , Figure 9 In this invention, an auxiliary L-shaped block 201 is added to the lower side of the rotor component 102. The L-shaped block 201 is located between two adjacent T-shaped blocks 2. The L-shaped block 201 is connected to the T-shaped block 2 by a connector. It is not necessary to open a pre-set hole on the stator component 101. Before emergency disengagement, the protruding part of the auxiliary L-shaped block 201 is inserted into the air gap on one side of the T-shaped block 2, thereby increasing the support area of ​​the bottom of the rotor component 102 during disengagement, effectively suppressing rotor sagging, and ensuring the smoothness and safety of the disengagement process. In one specific embodiment, the protruding part on the L-shaped block 201 is longer than the protruding part on the T-shaped block 2, so that the protruding part of the L-shaped block 201 can be inserted into the air gap before disengagement; In one specific implementation, refer to Figure 9 , Figure 10 , Figure 12 The connecting component includes a connecting crossbar 4 and a connecting U-plate 401 mounted on the connecting crossbar 4. The two ends of the connecting crossbar 4 are installed in the rotor mounting holes 2051 of the T-block 2 by bolt threads. An auxiliary mounting hole 402 is provided on the connecting U-plate 401. An auxiliary L-block 201 is installed in the auxiliary mounting hole 402 by bolt threads. It should be noted that the rotor component 102 has no axial displacement on one side of the L-shaped block 201, therefore, refer to... Figure 6 , Figure 7A connecting piece is also provided on one side of the rotor component 102 located on the L-shaped block 201. Thickened shims 5 are provided between the two ends of the connecting crossbar 4 and the stator mounting hole 205 of the L-shaped block 201. The thickened shims 5 are connected to the stator mounting hole 205 and the connecting crossbar 4 by bolt threads. The auxiliary mounting hole 402 of the connecting U plate 401 is in contact with the rotor end face. At this time, the set screw 207 is installed in the auxiliary mounting hole 402, which can restrict the axial displacement of the rotor component 102 on one side of the L-shaped block 201 and improve the stability of the rotor component 102. Among them, the thickness of the thickened shim 5 is greater than the displacement distance when the rotor 102 is disengaged in an emergency. The thickened shim 5 is provided with a limiting shaft 501. The limiting shaft 501 is in contact with the connecting crossbar 4 to prevent the connecting crossbar 4 from shaking. When the connecting crossbar 4 is on the side of the L-shaped block 201, it can be pre-installed with the L-shaped block 201 and fixed as the L-shaped block 201 is installed. In one specific embodiment, to facilitate the insertion of the protruding portions of the T-block 2 and L-block 201 into the air gap, refer to... Figure 11 The protruding parts include a fixing protrusion 202 near the stator component 101 and a fitting protrusion 203 near the rotor component 102. The fitting protrusion 203 is installed through a bending portion 204 of elastic material. A gap is provided between the fixing protrusion 202 and the fitting protrusion 203, and an insert plate 3 is slidably connected in the gap. Mounting blocks 301 are installed on both the stator component 101 and the rotor component 102 by bolt threads. (Refer to...) Figure 13 The mounting block 301 is threaded with an adjusting screw 302. One end of the adjusting screw 302 located inside the insert plate 3 has an annular protrusion, allowing the adjusting screw 302 to rotate within the insert plate 3. When the adjusting screw 302 rotates, it can control the gap between the insert plate 3 and the air gap. When it is necessary to insert the protruding part into the air gap, the fitting protruding block 203 is slightly bent toward the side of the fixed protruding block 202 to facilitate the protruding part entering the air gap. At this time, the insert plate 3 is pre-inserted into the gap and the mounting block 301 is installed on the stator 101 or the rotor 102. Then, by turning the adjusting screw 302, the insert plate 3 is gradually inserted into the gap to push the fitting protruding block 203 toward the rotor 102 side, fitting and filling the gap of the rotor 102. Compared with directly inserting the protruding part into the air gap, it can reduce the friction between the protruding part and the rotor 102 during installation during emergency disengagement, making assembly easier. Among them, reference Figure 10 When installing the auxiliary L-shaped block 201 during emergency disengagement, the auxiliary L-shaped block 201 can be pre-installed on the connector. At this time, as the rotor disengages, the adjusting screw 302 on the auxiliary L-shaped block 201 can be turned simultaneously to ensure the support stability of the auxiliary L-shaped block 201 on the rotor component 102. Compared with directly pushing the L-shaped block 201 to slide into the air gap, the stability is higher. In one specific embodiment, the device for rotating the adjusting screw 302 is a constant torque wrench. When the T-block 2 and L-block 201 are fixed on the stator 101 and the insert plate 3 is pre-inserted into the air gap, the constant torque wrench applies the same force. Therefore, when the adjusting screw 302 is turned, if eccentricity occurs, the pre-pressure on the protruding part is greater on the eccentric side. At this time, the insert plate 3 driven by the adjusting screw 302 is subjected to greater compressive force, so that the insert plate 3 driven by the adjusting screw 302 cannot be fully inserted into the gap to support and fit the protruding block 203, and cannot provide sufficient support force. After disengagement, a greater force is directly applied. There are several reasons for the emergency disengagement of the rotor (102) from the main shaft. One reason is... The problem is that the flexible coupling is damaged. The flexible coupling is a component that connects the crankshaft of the main machine and the main shaft of the rotor (102). When it is damaged, abnormal noise and vibration will occur. At this time, the support bearing of the main shaft will wear, which will cause the rotor 102 to shake. After the machine stops, the main shaft will cause a slight offset at one end of the rotor 102, which will reduce the air gap at the lower end and cause eccentricity. If there is eccentricity in the rotor 102, applying a larger force will reset the rotor 102, so as to facilitate the subsequent jacking operation of the rotor 102. At the same time, it will avoid the rotor 102 being damaged by excessive local force when it is eccentric before it is detached from the shaft. If there is no eccentricity, applying a larger force will have no effect.

[0018] In a specific routine assembly and transfer process, T-block 2 and L-block 201 are fixed to stator component 101 with bolts through stator mounting holes 205. At this time, the wedge-shaped protrusion is in a naturally contracted state. Using a tool, insert plate 3 is pre-inserted into the gap between fixing protrusion 202 and fitting protrusion 203. Rotating adjusting screw 302 drives insert plate 3 to slide inward, pushing fitting protrusion 203 to expand outward, so that it fits tightly against the outer circle of rotor component 102, filling the air gap to limit radial displacement. Multiple sets of T-block 2 and L-block 201 are distributed along the circumference to maintain uniform air gap. Insert the rotor 102 axially from right to left into the stator 101, and push the rotor 102 to the left until its left end face is in contact with the end face of the T-block 2, thus restricting the axial displacement of the rotor 102. Use bolts to pass through the rotor mounting holes 2051 on the T-block 2, penetrate and lock the rotor 102, thus restricting its circumferential rotation. Before the entire machine is assembled and put into operation, remove all T-blocks 2 and L-blocks 201. In a specific emergency disengagement operation, T-block 2 and L-block 201 are installed on stator component 101. The area between the two T-blocks 2 on the underside of the rotor is used as the key support area. The auxiliary L-block 201 is pre-installed on the connecting U-plate 401 of the connecting crossbar 4. The two ends of the connecting crossbar 4 are installed in the rotor mounting holes 2051 of the T-blocks 2 on both sides by bolts. The protruding part of the auxiliary L-block 201 is gradually pushed into the air gap by the adjusting screw 302 to provide bottom support and prevent the rotor from sagging during subsequent disengagement. During the disengagement operation, the rotor 102 moves toward the L-shaped block 201. As the rotor 102 moves, the adjusting screw 302 on the auxiliary L-shaped block 201 is adjusted synchronously, so that its protruding part is inserted deeper into the air gap, always maintaining the lifting force on the bottom of the rotor. When the rotor 102 moves to the target position, the set screw 207 in the set screw hole 206 of the T-shaped block 2 is tightened, so that it abuts against the end face of the rotor 102, preventing the rotor from resetting, and completing the axial positioning. On the L-shaped block 201 side, adjust the position of the connecting crossbar 4 so that the connecting U-plate 401 on it is close to the end face of the rotor 102. The connecting crossbar 4 is pre-installed on the L-shaped block 201 by the thickened shim 5 bolt. At this time, the left and right ends of the rotor 102 are clamped and fixed by the T-shaped block 2 and the set screw 207 on the L-shaped block 201 side, respectively. The radial direction is restricted by the wedge-shaped protrusion embedded in the air gap, so as to achieve a stable and safe suspension state, waiting for subsequent maintenance.

Claims

1. A T-shaped and L-shaped positioning device for mutual cooperation, comprising a T-shaped block (2) and an L-shaped block (201) installed between a generator rotor (102) and a stator (101), characterized in that, Both the T-block (2) and the L-block (201) are provided with wedge-shaped protrusions. Both the T-block (2) and the L-block (201) are provided with stator mounting holes (205). The T-block (2) is provided with rotor mounting holes (2051). The L-block (201) is located on the lower side of the rotor component (102) and is connected between two adjacent T-blocks (2) by a connector. The T-block (2) and the rotor (102) are fitted with a set screw hole (206), and the set screw hole (206) is internally threaded with a set screw (207). The connector includes a connecting crossbar (4) and a connecting U-plate (401) mounted on the connecting crossbar (4). The length of the protruding part on the L-shaped block (201) is greater than that of the protruding part on the T-shaped block (2); The protruding part includes a fixed protruding block (202) near the stator (101) and a fitting protruding block (203) near the rotor (102), and a gap is provided between the fixed protruding block (202) and the fitting protruding block (203), and an insert plate (3) is slidably connected in the gap. The stator (101) and rotor (102) are each fitted with a mounting block (301) by bolt threads. The mounting block (301) is threaded with an adjusting screw (302), which rotates inside the insert plate (3).

2. The T-type and L-type positioning device for mutual cooperation according to claim 1, characterized in that, When the connecting crossbar (4) is located on one side of the T-block (2), both ends of the connecting crossbar (4) are installed in the rotor mounting hole (2051) of the T-block (2) by bolt threads. An auxiliary mounting hole (402) is provided on the connecting U plate (401), and the auxiliary L-block (201) is installed in the auxiliary mounting hole (402) by bolt threads.

3. The T-type and L-type positioning device for mutual cooperation according to claim 1, characterized in that, When the connecting crossbar (4) is located on one side of the L-shaped block (201), thickened gaskets (5) are provided between the two ends of the connecting crossbar (4) and the stator mounting holes (205) of the L-shaped block (201). The thickened gaskets (5) are connected to the stator mounting holes (205) and the connecting crossbar (4) by bolt threads. The auxiliary mounting holes (402) of the connecting U-plate (401) are in contact with the rotor end face.

4. The T-type and L-type positioning device for mutual cooperation according to claim 3, characterized in that, The auxiliary mounting hole (402) is used to install the set screw (207).

5. A T-type and L-type positioning device for mutual cooperation according to claim 3, characterized in that, The thickened pad (5) is provided with a limiting shaft (501), which is in contact with the connecting crossbar (4) to prevent the connecting crossbar (4) from shaking.

6. A T-type and L-type positioning device for mutual cooperation according to claim 1, characterized in that, The fitting protrusion (203) is installed via the bending portion (204).

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