Half type permanent magnet shaft generator structure and installation method

Abstract

The invention relates to a split-half type permanent magnet shaft generator structure and an installation method, the split-half type permanent magnet shaft generator structure comprises a split-half type stator, a split-half type rotor and a split-half type end cover, the split-half type rotor comprises a split-half type expansion sleeve, a split-half type connecting flange and a split-half type rotor iron core, and the split-half type rotor iron core is connected into a whole-circle rotor iron core through axially distributed bolts; the split connecting flange is connected into a whole circle through bolts which are axially distributed, the split connecting flange and the split rotor iron core are connected together through bolts which are radially and uniformly distributed along the circumference, and the split connecting flange is fixed on a ship main shaft in an expansion manner through the split expansion sleeve; the magnetic conductive tool is installed in a magnetic isolation groove of the split-half type rotor iron core and used for eliminating external magnetism of the rotor. The split-half stators are connected together through bolts which are axially distributed, and the stators and the rotor are coaxially arranged; the end face of the split-half stator is fixedly connected with a split-half end cover, and detachable stepped supporting blocks are evenly installed on the inner wall of the split-half end cover and used for adjusting an air gap of the generator.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and particularly to a split-type permanent magnet shaft generator structure and an installation method thereof, which are applicable to the disassembly-free transformation of ship main shafts. Background Art

[0002] Installing a shaft generator on an existing ship can help the ship save fuel and reduce carbon emissions. To meet the requirements of ship navigation, a split-type permanent magnet shaft generator is usually installed. Since the permanent magnet rotor has strong magnetism, the strong magnetic rotor requires a large installation space and few magnetic structural parts around it. At the same time, due to the influence of magnetism, the installation is difficult and the installation time is long; when adjusting the air gap between the stator and the rotor, due to the strong magnetism of the rotor, the stator and the rotor are easily attracted together, causing damage to the inner surfaces of the stator and the rotor, and also affecting the installation cycle.

[0003] The existing split-type generators have the following problems:

[0004] 1. The strong magnetic field of the permanent magnet rotor causes difficult installation and easy adsorption of metal parts;

[0005] 2. During the adjustment of the air gap between the stator and the rotor, collisions and damages are likely to occur due to magnetic attraction;

[0006] 3. The existing patent document CN202311017261.X proposes a split-type expansion sleeve structure, but does not solve the magnetic interference problem; CN201310022633.8 adopts a double-stator guide rod assembly, but cannot adapt to the narrow space of the ship.

[0007] Therefore, it is necessary to design a split-type permanent magnet shaft generator structure and an installation method, which cooperate with a magnetic conduction tooling and a stepped support block to overcome the above defects. Summary of the Invention

[0008] The object of the present invention is to provide a split-type permanent magnet shaft generator structure and an installation method thereof. Through the split-type design of the generator, the generator can be installed without affecting the ship main shaft; a magnetic conduction tooling is arranged on the permanent magnet rotor, so that the permanent magnet rotor does not show strong magnetism externally, and the rotor and the stator can be installed more safely and quickly; by arranging a stepped support block on the split-type end cover, the air gap of the generator can be adjusted safely and quickly; the installation method proposed by the present invention can install the split-type permanent magnet shaft generator safely and quickly, reducing the impact on ship navigation.

[0009] To achieve the above object, the technical solution of the present invention is: a split-type permanent magnet shaft generator structure, including a split-type stator, a split-type rotor, a cooling chamber, split-type end covers, an installation tooling. The split-type rotor includes a split-type expansion sleeve, a split-type connection flange, and a split-type rotor core. The split-type expansion sleeve, the split-type connection flange, and the split-type rotor core are arranged coaxially and radially from the inside to the outside. The split-type rotor core is connected into a circular rotor core by axially distributed bolts. Permanent magnets are axially embedded in the rotor core. The split-type connection flanges are connected into a whole circle by axially distributed bolts. The split-type connection flange and the split-type rotor core are connected together by bolts evenly distributed along the circumference in the radial direction, and the split-type connection flange is tightened and fixed to the ship's main shaft through the split-type expansion sleeve; the installation tooling includes a magnetic conduction tooling and a stepped support block; the magnetic conduction tooling is installed in the magnetic isolation groove of the split-type rotor core to eliminate the external magnetism of the rotor; the split-type stator is connected together by axially distributed bolts, and the stator and the rotor are arranged coaxially; the end face of the split-type stator is fixedly connected to the split-type end cover, and the stepped support blocks are evenly installed on the inner wall of the split-type end cover for adjusting the air gap of the generator.

[0010] Further, the cross-sectional shape of the magnetic conduction tooling is completely matched with the magnetic isolation groove and is made of a high magnetic conductivity material.

[0011] Further, one end outer diameter of the stepped support block matches the inner diameter of the split-type end cover, and the other end outer diameter is 1-3 mm larger than the inner diameter of the split-type end cover.

[0012] Further, the split-type end cover is circumferentially and evenly provided with air gap adjustment holes, and detachable covers are arranged in the holes.

[0013] Further, the inner diameter of the split-type end cover is the same as the inner diameter of the end face of the rotor core.

[0014] An installation method for a split-type permanent magnet shaft generator structure, the steps of which are as follows:

[0015] The first step is to use bolts to connect and fix the split-type connection flanges into a whole circle, and then tighten and fix the connection flange to the ship's main shaft through the split-type expansion sleeve;

[0016] The second step is to install the magnetic conduction tooling into the magnetic isolation groove of the split-type rotor core;

[0017] The third step is to use bolts to fix the split rotor core to the split-type connection flange;

[0018] The fourth step is to coaxially install the split-type stator outside the rotor. The split-type stator is connected into a whole by bolts, fix the stator feet, and remove the magnetic conduction tooling;

[0019] The fifth step is to install the split-type end cover on the end face of the stator, and evenly distribute and install the stepped support blocks in the screw holes on the inner wall of the split-type end cover along the circumference;

[0020] Step 6: Measure the air gap of the generator through the air gap adjustment holes on the split end cover, adjust the stator-rotor gap, and remove the support blocks after completion.

[0021] Step 7: Install the generator cooling chamber, and install the air gap cover plate and the protective cover plate.

[0022] Furthermore, in Step 2, the installation of the magnetic conduction tooling needs to cover all the magnetic isolation grooves.

[0023] Furthermore, in Step 5, the steps of the stepped support blocks face outward to ensure a certain gap between the support blocks and the rotor.

[0024] Furthermore, in Step 6, adjust the horizontal, axial, and vertical positions of the stator according to the air gap size, and fix the stator after adjusting the air gap of the generator.

[0025] The beneficial effects of the present invention are as follows:

[0026] Through the design of the split generator, the magnetic conduction tooling, and the stepped support blocks, the installation method proposed by the present invention can safely and quickly install the split permanent magnet shaft generator without affecting the ship's main shaft, reducing the impact on ship shipping.

[0027] The present invention has significant technological progress compared with the prior art:

[0028] 1. Improved safety: The use of stepped support blocks for installation can prevent the stator from being adsorbed to the rotor, damaging the inner surface of the stator and the outer surface of the rotor; the magnetic conduction tooling makes the rotor non-magnetic externally, and ferromagnetic components (such as bolts and tools) will not cause accidents due to magnetic field adsorption during the installation process.

[0029] 2. Optimized efficiency: The stepped support blocks simplify the air gap adjustment process, eliminating the need to repeatedly adjust the stator-rotor position, shortening the installation cycle; the magnetic conduction tooling makes the rotor non-magnetic externally, enabling faster installation.

[0030] 3. Enhanced compatibility: Combined with the split structure, it is applicable to scenarios where the main shaft of the built ship is non-detachable, expanding the application range. Description of the Drawings

[0031] Figure 1 It is a schematic diagram of the overall structure of the generator of the present invention;

[0032] Figure 2 It is an axial sectional view of the generator of the present invention;

[0033] Figure 3 It is a schematic diagram of the rotor of the generator of the present invention;

[0034] Figure 4 It is a schematic diagram of the installation of the magnetic conduction tooling;

[0035] Figure 5 It is a schematic diagram of the stepped support block. Specific implementation manner

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0037] As Figures 1 to 5 shown. The split-type permanent magnet shaft-driven generator structure of the present invention includes a split-type stator 7, a split-type rotor 6, a cooling chamber 1, and a split-type end cover 3. The installation tooling includes a magnetic conduction tooling 14 and a stepped support block 2.

[0038] The split-type rotor includes a split-type rotor core 8, a split-type bracket 9, a split-type expansion sleeve 10, a split-type connection flange 11, and a permanent magnet 13. The split-type expansion sleeve 10, the split-type connection flange 11, the split-type bracket 9, and the split-type rotor core 8 are coaxially arranged radially from the inside to the outside. The split-type connection flange 11 is tightened and connected to the ship's main shaft 4 through the split-type expansion sleeve 10. The split-type connection flange 11 and the split-type bracket 9 are respectively connected into a whole circle through axially distributed bolts. The split-type connection flange 11 and the split-type bracket 9 are connected together through radially circumferentially evenly distributed bolts. The split-type rotor core 8 is fixed to the surface of the split-type rotor bracket 9 through radially arranged bolts. The permanent magnet 13 is axially embedded in the rotor core 8;

[0039] The split-type stator 7 is connected together through axially distributed bolts, and the stator and the rotor are coaxially arranged;

[0040] The split-type end cover 3 is provided with a plurality of adjustment holes for adjusting the air gap between the generator stator and the rotor along the circumference. A circular cover plate 5 is arranged outside the adjustment holes. The split-type end cover 3 is fixed to the end face of the stator 7 through connecting bolts. The inner diameter of the split-type end cover 3 is the same as the inner diameter of the end face of the rotor bracket 9;

[0041] The cross-section of the magnetic conduction tooling 14 inserted into the rotor core part is the same as the cross-section of the magnetic isolation groove 12 of the rotor core. Installing the magnetic conduction tooling 14 into the magnetic isolation groove 12 of the split-type rotor core 8 can make the rotor core 8 containing the permanent magnet not generate magnetism externally, facilitating the quick installation of the rotor and the stator;

[0042] One end stepped outer diameter of the stepped support block 2 is the same as the inner diameter of the split-type end cover 3, and the other end stepped outer diameter is slightly larger than the inner diameter of the split-type end cover 3 (the empirical value is half of the air gap between the stator and the rotor). This can ensure that when adjusting the air gap of the generator, the permanent magnet rotor and the stator 7 do not attract together, reducing possible damage to the generator and installation time.

[0043] The installation method is as follows:

[0044] First step, use bolts to connect and fix the split connecting flange 11 into a complete circle, and then use the split expansion sleeve 10 to expand and fix the split connecting flange 11 onto the ship's main shaft 4;

[0045] Second step, install the magnetic conduction tooling 14 into the magnetic isolation groove 12 of the split rotor core 8;

[0046] Third step, the split rotor core 8 and the split bracket 9 have been connected as a whole at the motor manufacturing factory, and use bolts to fix them onto the split connecting flange 11;

[0047] Fourth step, coaxially install the split stator 7 outside the rotor. The split stator 7 is connected by bolts into a whole stator, firmly fix the stator to the ship installation base, and remove the magnetic conduction tooling 14 on the rotor;

[0048] Fifth step, use connecting bolts to install the split end cover 3 on the end face of the stator, and evenly distribute the stepped support blocks 2 circumferentially in the inner wall screw holes of the split end cover 3. Note that the direction of the stepped support blocks with steps faces outward to ensure there is a certain gap between the stepped support block 3 and the rotor;

[0049] Sixth step, measure the generator air gap through the air gap adjustment hole 5 on the split end cover 3, adjust the horizontal, axial, and vertical positions of the stator according to the air gap size. After adjusting the generator air gap, fix the stator and remove the stepped support block 2;

[0050] Seventh step, install the generator cooling chamber 1 and install the generator adjustment hole cover plate 5.

[0051] The split permanent magnet shaft-driven generator structure and installation method of the present invention have the following characteristics:

[0052] 1. In terms of structure: The split structure enables the main shaft to be disassembled and assembled without disassembly. The split stator and rotor eliminate installation magnetic interference through the magnetic conduction tooling; the stepped support block prevents the air gap from closing and ensures the safety of air gap adjustment.

[0053] 2. In terms of method: Step-by-step assembly combines magnetic shielding and mechanical limiting. Magnetic shielding and mechanical support provide double guarantees for installation safety and achieve fast and safe installation.

[0054] 3. Through technical verification: The use of the magnetic conduction tooling reduces the installation space around by 200 mm; the use of the magnetic conduction tooling and the stepped support block shortens the installation time by 20%, and at the same time avoids magnetic adsorption accidents.

Claims

1. A split-half permanent magnet shaft generator structure, characterized in that: The invention comprises a half-type stator, a half-type rotor, a cooling chamber, a half-type end cover, and an installation tool. The half-type rotor comprises a half-type expansion sleeve, a half-type connecting flange, and a half-type rotor core. The half-type expansion sleeve, the half-type connecting flange, and the half-type rotor core are coaxially and radially arranged from the inside to the outside. The half-type rotor core is connected to form a full-circle rotor core by axially distributed bolts. The rotor core is embedded with permanent magnets along the axial direction. The half-type connecting flange is connected to form a full circle by axially distributed bolts. The half-type connecting flange and the half-type rotor core are connected to each other. The split stators are connected together by bolts evenly distributed radially along the circumference, and the split connecting flange is expanded and fixed to the ship's main shaft through a split expansion sleeve; the installation tooling includes a magnetic conductive tooling and a stepped support block; the magnetic conductive tooling is installed in the magnetic isolation groove of the split rotor core to eliminate the external magnetism of the rotor; the split stator is connected together by axially distributed bolts, and the stator and rotor are arranged coaxially; the end face of the split stator is fixedly connected to the split end cover, and the inner wall of the split end cover is evenly installed with a detachable stepped support block to adjust the generator air gap.

2. The half-type permanent magnet shaft generator structure according to claim 1 is characterized in that: The cross-sectional shape of the magnetic conductive tooling is completely matched with the magnetic isolation groove, and is made of high magnetic conductive material.

3. The half-type permanent magnet shaft generator structure according to claim 1 is characterized in that: The outer diameter of one end of the stepped support block matches the inner diameter of the half-type end cover, and the outer diameter of the other end is 1-3 mm larger than the inner diameter of the half-type end cover.

4. The half-type permanent magnet shaft generator structure according to claim 1 is characterized in that: The half-type end cover is circumferentially arranged with air gap adjustment holes, and a detachable cover plate is arranged in the hole.

5. The half-type permanent magnet shaft generator structure according to claim 1 is characterized in that: The inner diameter of the half-type end cover is the same as the inner diameter of the rotor core end face.

6. A method for installing a split-half permanent magnet shaft generator, characterized in that: The steps are as follows: The first step is to use bolts to connect and fix the half-type connecting flange into a full circle, and then use the half-type expansion sleeve to expand and fix the connecting flange to the main shaft of the ship; The second step is to install the magnetic conductive tooling into the magnetic isolation slot of the half-rotor core; The third step is to use bolts to fix the half rotor core to the half connecting flange; The fourth step is to coaxially install the half stator to the outside of the rotor, connect the half stator into a whole by bolts, fix the stator foot, and remove the magnetic guide fixture; Step 5: Install the half-end cover on the stator end face, and install the stepped support blocks evenly distributed along the circumference into the inner wall screw holes of the half-end cover; Step 6: Measure the air gap of the generator through the air gap adjustment hole on the half-type end cover, and adjust the air gap size according to technical requirements. After completion, remove the step support block; Step 7: Install the generator cooling chamber, air gap cover and protective cover.

7. The method for installing a split-half permanent magnet shaft generator according to claim 6, characterized in that: In the second step, the installation of the magnetic conductive tooling must cover all the magnetic isolation grooves.

8. The method for installing a split-half permanent magnet shaft generator according to claim 6, characterized in that: In the fifth step, the steps of the stepped support block are oriented outward to ensure a certain gap between the support block and the rotor.

9. The method for installing a split-half permanent magnet shaft generator according to claim 6, characterized in that: In the sixth step, the horizontal, axial and vertical positions of the stator are adjusted according to the size of the air gap, and the stator is fixed after the air gap of the generator is adjusted.

Images