Motor assembly device for electric compound turbocharger and assembly method thereof

Abstract

The application provides a motor assembling device and method of an electric composite turbocharger, and belongs to the field of ship power turbochargers. The assembling problem of an integrated motor of an electric composite turbocharger is solved. The motor rotor of the device is fixed on a compression impeller, a guide block is installed on the motor rotor shaft, a motor stator is fixed outside the motor rotor, the motor stator is installed on a motor support frame, a centering flange and a tension and compression flange are sequentially installed behind the motor stator, a locking flange is installed at the center of the centering flange, a tension and compression screw rod passes through the locking flange and the tension and compression flange, one end of a motor guide rod is axially fixed with the motor support frame, and the other end is fixedly positioned with the locking flange. The application has the advantages of ingenious design, convenient installation, efficient assembling and the like.

Description

Technical Field

[0001] This invention belongs to the field of marine power superchargers, and relates to the assembly device and method of a large-flow electric composite turbocharger for marine exhaust gas, and particularly to a motor assembly device and assembly method for an electric composite turbocharger. Background Technology

[0002] Turbochargers are typical components of diesel engines, working in conjunction with the engine to effectively increase its output power. Modern marine diesel engines, moving towards higher power density, place demands on turbochargers with high pressure ratios and high efficiency. As boost pressure increases, the matching contradiction between marine diesel engines and turbochargers becomes more prominent. Typically, matching is performed under rated operating conditions. At low operating conditions, insufficient exhaust gas energy leads to low turbocharger efficiency; at high operating conditions, high exhaust gas energy prevents the turbocharger from being fully utilized, resulting in a high turbocharger pressure ratio and even the risk of overspeeding.

[0003] Currently, the drawback of traditional turbochargers is their slow response speed, which easily leads to turbo lag. Electric compound turbocharging technology adds an electric motor as an auxiliary device to the traditional turbocharger. The auxiliary pressure provided by the electric motor accelerates the turbocharger's rotation speed, thereby increasing the engine's intake air volume and improving engine response performance and fuel economy. The electric compound turbocharger adds an integrated starter-motor at the compressor end, making its structure more complex than a conventional turbocharger. To improve the efficiency of the integrated starter-motor, the air gap C between the stator and rotor is very small, which poses challenges to its assembly. Therefore, this paper proposes an assembly device and method for the integrated starter-motor of the electric compound turbocharger, which is key to solving the aforementioned problems. Summary of the Invention

[0004] In view of this, in order to solve the assembly problem of the integrated motor for electric compound turbochargers mentioned in the background art, the present invention proposes a motor assembly device and assembly method for electric compound turbochargers.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a motor assembly device for an electric compound turbocharger, comprising a tension / compression screw, a plurality of motor guide rods, a centering flange, a motor stator, a motor support frame, a motor rotor, a guide block, and a tension / compression flange; The motor rotor is fixed on the air compressor impeller. A guide block is installed on the motor rotor shaft. A motor stator is fixed to the outside of the motor rotor. The motor stator is installed on the motor support frame. A centering flange and a tension flange are installed in sequence behind the motor stator. A locking flange is installed at the center of the centering flange. The tension bolt passes through the locking flange and the tension flange. One end of the motor guide rod is axially fixed to the motor support frame, and the other end is positioned and fixed to the locking flange.

[0006] Furthermore, a double-direction thrust bearing is installed at the center of the center flange to balance the thrust during the axial movement of the tension / compression screw.

[0007] Furthermore, the locking flange is provided with a locking boss for limiting the thrust bearing b-face of the bidirectional thrust bearing.

[0008] Furthermore, the motor rotor is equipped with a permanent magnet.

[0009] Furthermore, the gap C between the motor rotor and the motor stator is 3-5mm.

[0010] Furthermore, the centering flange adopts a hollow structure.

[0011] Furthermore, the tension / compression screw includes a fixed thread, a bearing mounting shaft, a three-pronged screw, and a hexagonal head connected in sequence. The three-pronged screw is used to enable rapid movement of the screw pair. The bearing mounting shaft and the fixed thread are used to install a bidirectional thrust bearing on the tension / compression screw. The hexagonal head structure is used for wrench clamping to apply rotational torque.

[0012] Furthermore, by rotating the tension screw, the motor stator is pressed into the mounting beam of the motor bracket, ensuring precise positioning and installation of the motor rotor and stator.

[0013] Furthermore, the guide block is made of a non-magnetic material.

[0014] An assembly method for an electric compound turbocharger motor assembly device specifically includes the following steps: Step 1: Install the double-direction thrust bearing in the bearing mounting hole of the centering flange, and fix the locking flange to the centering flange with the fixing bolts; Step 2: Insert the tensioning screw into the centering flange and tighten it with the lock nut to secure it to the double-acting thrust bearing. The tensioning screw and the centering flange can rotate relative to each other. Step 3: Secure the motor stator to the centering flange with tension and compression screws by bolting the motor end cover; Step 4: Install the three motor guide rods onto the motor bracket; Step 5: Lift the assembly fixture with the motor stator installed horizontally, center it horizontally so that the centering flange and the tension flange are positioned and fixed on the motor guide rod, and tighten them with the fixing nuts; Step 6: Insert the guide block into the motor rotor. Installation is complete.

[0015] Compared with the prior art, the beneficial effects of the motor assembly device and assembly method for an electric compound turbocharger described in this invention are: (1) The electric compound turbocharger motor assembly device of the present invention is composed of a motor guide rod, a tension thread rod, a centering flange, a motor support frame, etc., forming a piston-like device. The motor housing with the motor stator is installed on the centering flange to realize the axial movement of the motor housing. The motor support frame and the motor rotor have a high coaxiality with an error of less than 0.2 mm. The air gap between the motor rotor and the stator is 5 mm. At the same time, an aluminum guide block is installed on the motor rotor shaft. The diameter of the guide block is larger than the diameter of the motor rotor. It is used to guide the movement of the motor rotor and the stator and avoid collision between the rotor and the stator. It effectively solves the problem of collision and adsorption during the lateral installation of the small air gap motor stator and the strong magnetic rotor. (2) The motor assembly device for an electric composite turbocharger described in this invention adopts a three-threaded rod structure, which realizes the rapid assembly of the motor rotor.

[0016] (3) The bidirectional thrust bearing structure described in this invention can enable the threaded rod to be subjected to bidirectional force, and can achieve high-precision assembly of the motor housing.

[0017] (4) The guiding device described in this invention can ensure the precise guidance and installation of the motor stator and rotor.

[0018] (5) The motor assembly device for an electric composite turbocharger described in this invention has the advantages of ingenious design, convenient installation and efficient assembly. Attached Figure Description

[0019] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 A schematic diagram of the motor assembly / disassembly device; Figure 2 This is a schematic diagram of a tension / compression screw structure; Figure 3 This is a schematic diagram of the motor guide rod structure; Figure 4 This is a schematic diagram of the center flange structure; Figure 5 This is a cross-sectional view of the motor; Figure 6This is a schematic diagram of the motor support frame structure; Figure 7 This is a schematic diagram of the guide block structure; Figure 8 This is a schematic diagram of the locking flange structure; Figure 9 This is a schematic diagram of a bidirectional thrust bearing structure. Figure 10 This is a schematic diagram of a tension / compression flange structure; Figure 11 This is a schematic diagram of the locking nut structure; In the diagram: 1-Pull-Compression screw, 1a-Fixing thread, 1b-Bearing mounting shaft, 1c-Three-pronged screw, 1d-Hexagonal head, 2-Motor guide rod, 2a-Torque hole, 2b-Mounting thread a, 2c-Positioning surface, 2d-Guide rod, 2e-Fixing thread, 3-Fixing nut, 4-Center flange, 4a-Guide hole, 4b-Fixing hole 1, 4c-Fixing screw hole, 4d-Hollowed structure, 4e-Bearing mounting hole, 5-Motor stator, 5a-Motor screw hole, 5b-Motor positioning platform, 5c-Circumferential fixing hole, 6-Motor bracket, 6a-Motor end cover screw hole, 6b-Fixing hole 2, 6c-Limiting boss, 6d-Mounting beam, 6e-Mounting hole, 7-Compressor impeller, 8-Fixing bolt, 9-Motor Rotor, 9a-Rotor mounting hole, 9b-Permanent magnet, 9c-Rotor shaft hole, 10-Guide block, 10a-Pull-out screw hole, 10b-Guide structure, 10c-Protective surface, 10d-Insert shaft, 11-Locking nut, 11a-Locking screw hole, 11b-Hexagonal head, 11c-Locking boss, 12-Locking flange, 12a-Limiting boss, 12b-Fixing hole No. 3, 12c-Ejection hole, 13-Double thrust bearing, 13a-Thrust bearing A-side, 13b-Thrust bearing B-side, 13c-Thrust bearing C-side, 14-Locking bolt, 15-Motor end cover bolt, 16-Pull-compression flange, 16a-Fixing hole No. 4, 16b-Three-threaded hole, 16c-Hollowed structure, C-Motor air gap. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.

[0021] like Figure 1 , Figure 6 As shown, the electric compound turbocharger motor assembly device of the present invention includes a tension and compression screw 1, a plurality of motor guide rods 2, a centering flange 4, a motor stator 5, a motor support frame 6, a motor rotor 9, a guide block 10 and a tension and compression flange 16. The motor rotor 9 is fixed to the air impeller 7 by fixing bolts 8. A guide block 10 is installed on the shaft of the motor rotor 9. A motor stator 5 is fixed to the outside of the motor rotor 9. The motor stator 5 is installed on the motor support frame 6. A centering flange 4 and a tension flange 16 are installed in sequence behind the motor stator 5. A locking flange 12 is installed at the center of the centering flange 4. The tension bolt 1 passes through the locking flange 12 and the tension flange 16. One end of the motor guide rod 2 is axially fixed to the motor support frame 6, and the other end is positioned and fixed to the locking flange 12.

[0022] The motor support frame 6 and the air impeller 7 are kept in a relatively fixed position. The motor support frame 6 is provided with 3 mounting beams 6d. The mounting beams 6d are provided with motor fixing holes 6a and limiting bosses 6c for positioning and fixing the motor stator 5. At the same time, the mounting beams 6d are provided with motor stator tooling mounting holes 6e for installing the motor guide rod 2.

[0023] like Figure 4 As shown, the centering flange 4 is provided with a fixing hole 4b corresponding to the motor threaded hole 5a. The motor housing can be fixed to the centering flange 4 by the motor cover bolt 15. The centering flange 4 is provided with three guide holes 4a for axial movement of the centering flange 4 on the motor guide rod 2. The centering flange 4 is provided with a bearing mounting hole 4e for installation of the bidirectional thrust bearing 13. The centering flange 4 adopts a hollow structure 4d for structural lightweighting and the lead-out of motor wires. like Figure 5 As shown, the motor stator 5 has 8 motor screw holes 5a at its motor output end for fixing the center flange 4; the motor stator 5 has 3 motor positioning platforms 5b arranged axially for circumferential positioning and installation of the motor stator 5 and the motor support frame 6; the motor positioning platform has 2 circumferential fixing screw holes for fixing the motor stator 5 on the motor support frame 6.

[0024] The motor rotor 9 has 6 rotor mounting holes for fixing the motor rotor 9 to the air impeller 7; the motor rotor 9 has a permanent magnet 9b with strong magnetic force; the gap C between the motor rotor 9 and the motor stator 5 is very small, only 3-5mm; improper assembly can easily cause adsorption and rubbing, leading to rotor damage; the motor rotor 9 has a hollow rotor shaft hole 9c, which can be used for the installation of the guide block 10.

[0025] like Figure 10 As shown, the tension flange 16 adopts a hollow structure 16c of a hub for structural lightweighting; the tension flange 16 is provided with a three-threaded hole structure 16b, which forms a screw pair with the tension screw 1, and achieves axial back-and-forth movement by rotation; the tension flange 16 is provided with three fixing holes 16a for connection with the motor guide rod 2.

[0026] like Figure 2 As shown, the tension screw 1 adopts a three-headed screw 1c structure to achieve rapid movement of the screw pair; one end of the tension screw 1 is provided with a bearing mounting shaft 1b and a fixing thread 1a structure for mounting the bidirectional thrust bearing 13 on the tension screw 1; the other end of the tension screw 1 is a hexagonal head structure 1d for applying rotational torque by clamping with a wrench. By rotating the tension screw 1, the motor stator 5 is pressed into the mounting beam 6d of the motor bracket 6, ensuring the precise positioning and installation of the motor rotor 5 and stator 9.

[0027] like Figure 3 As shown, the motor guide rod 2 adopts a slender guide rod 2d structure, which is used to guide and support the motor housing 5 during axial installation; one end of the motor guide rod 2 is provided with a thread 26 for axial fixation with the motor support frame 6; the other end of the motor guide rod 2 is a thread 2e + positioning shaft 2c + torque hole 2a, which is used for positioning and fixing the tension flange 16.

[0028] One end of the motor guide rod 2 is connected to the motor support frame, and the other end is fixed to the tension flange 16. The motor housing is connected to the centering flange 4 as a whole. The centering flange 4 can realize the axial movement of the motor housing back and forth through the guide hole 4a on it.

[0029] like Figure 7 As shown, the guide block 10 is made of non-magnetic material to prevent the guide block from being magnetically attracted by the rotor 9; the guide block 10 is provided with an insertion shaft 10d structure for mounting the guide block 10 on the shaft of the motor rotor 9; the guide block 10 is provided with a large inclined guide structure 10b for guiding the motor stator 5 and the motor rotor 9 during assembly; the guide block 10 is provided with a protective surface structure 10c for protecting the surface of the motor rotor 9 when the motor stator 5 and the motor rotor 9 are assembled and disassembled.

[0030] like Figure 8 As shown, the locking flange 12 has a fixing hole 12b on it, which is used to fix it to the centering flange 4; the locking flange 12 has a locking boss 12a, which is used to limit the bidirectional thrust bearing b surface 13b and realize the axial bearing force when the motor housing 5 is installed; the locking flange 12 has an ejection hole 12c, which is used to eject the locking flange 12 from the center flange 4.

[0031] like Figure 9 As shown, the bidirectional thrust bearing 13 adopts a commonly used bidirectional thrust bearing structure to balance the thrust of the tension screw 1 during axial movement and prevent the tension screw 1 from jamming during rapid rotation.

[0032] Figure 11 As shown, the locking nut 11 has a locking screw hole 11a, which is used to fix it on the bearing mounting shaft 1b; the locking nut has a locking boss 11c, which is used to lock the intermediate body 13b of the bidirectional thrust bearing 13.

[0033] The assembly method of the electric compound turbocharger motor assembly device of the present invention is as follows: Step 1: Install the double-direction thrust bearing 13 into the bearing mounting hole 4e of the centering flange 4, and fix the locking flange 12 onto the centering flange 4 with fixing bolts 14. The double-direction thrust bearing 13 has a certain axial clearance in the mounting hole 4e of the centering flange 4 to ensure that the double-direction thrust bearing 13 can rotate freely. Step 2: Insert the tension screw 1 into the centering flange 4 and tighten it with the lock nut 11 to the double thrust bearing 13. The tension screw 1 and the centering flange 4 should rotate relative to each other. Step 3: Fix the motor stator 5 to the centering flange 4 on which the tension and compression screw rod 1 is installed using the motor end cover bolts 15; Step 4: Install the three motor guide rods 2 onto the motor bracket 6; Step 5: Lift the assembly fixture with the motor stator 5 horizontally, center it horizontally so that the centering flange 4 and the tension flange 16 are positioned and fixed on the motor guide rod 2, and tighten them with the fixing nut 3; Step 6: Insert guide block 10 into motor rotor 9, and guide and protect it with motor stator 5. The motor assembly device of electric compound turbocharger is now installed.

[0034] The embodiments of the present invention disclosed above are merely illustrative of the invention. These embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. A motor assembly device for an electric compound turbocharger, characterized in that: It includes a tension / compression screw (1), several motor guide rods (2), centering flange (4), motor stator (5), motor support frame (6), motor rotor (9), guide block (10) and tension / compression flange (16); The motor rotor (9) is fixed on the air impeller (7). A guide block (10) is installed on the shaft of the motor rotor (9). A motor stator (5) is fixed on the outside of the motor rotor (9). The motor stator (5) is installed on the motor support frame (6). A centering flange (4) and a tension flange (16) are installed in sequence behind the motor stator (5). A locking flange (12) is installed at the center of the centering flange (4). The tension screw (1) passes through the locking flange (12) and the tension flange (16). One end of the motor guide rod (2) is axially fixed to the motor support frame (6), and the other end is positioned and fixed to the locking flange (12).

2. The motor assembly device for the electric compound turbocharger according to claim 1, characterized in that: The center flange (4) is equipped with a bidirectional thrust bearing (13) to balance the thrust of the tension screw (1) during axial movement.

3. The motor assembly device for the electric compound turbocharger according to claim 1, characterized in that: The locking flange (12) is provided with a locking boss (12a) for limiting the thrust bearing b surface (13b) of the bidirectional thrust bearing (13).

4. The motor assembly device for the electric compound turbocharger according to claim 1, characterized in that: The motor rotor (9) is provided with a permanent magnet (9b).

5. The motor assembly device for the electric compound turbocharger according to claim 3, characterized in that: The gap C between the motor rotor (9) and the motor stator (5) is 3-5mm.

6. The motor assembly device for the electric compound turbocharger according to claim 1, characterized in that: The centering flange (4) adopts a hollow structure.

7. The motor assembly device for the electric compound turbocharger according to claim 1, characterized in that: The tension / compression screw (1) includes a fixed thread (1a), a bearing mounting shaft (1b), a three-pronged screw (1c), and a hexagonal head (1d) connected in sequence. The three-pronged screw (1c) is used to enable rapid movement of the screw pair. The bearing mounting shaft (1b) and the fixed thread (1a) are used to install the bidirectional thrust bearing (13) on the tension / compression screw (1). The hexagonal head (1d) is used to clamp the screw with a wrench to apply rotational torque.

8. The motor assembly device for the electric compound turbocharger according to claim 7, characterized in that: By rotating the tension screw (1), the motor stator (5) is pressed into the mounting beam (6d) of the motor bracket (6), ensuring the precise positioning and installation of the motor rotor (9) and the motor stator (5).

9. The motor assembly device for the electric compound turbocharger according to claim 1, characterized in that: The guide block (10) is made of non-magnetic material.

10. An assembly method for the motor assembly device of the electric compound turbocharger as described in claim 2, characterized in that: Specifically, the following steps are included: Step 1: Install the double thrust bearing (13) in the bearing mounting hole (4e) of the centering flange (4), and fix the locking flange (12) on the centering flange (4) with fixing bolts (14); Step 2: Insert the tension screw (1) into the centering flange (4) and tighten it with the lock nut (11) to the double thrust bearing (13). The tension screw (1) and the centering flange (4) can rotate relative to each other. Step 3: Fix the motor stator (5) to the centering flange (4) on which the tension and compression screws (1) are installed by the motor end cover bolts (15); Step 4: Install the three motor guide rods (2) onto the motor bracket (6); Step 5: Lift the assembly fixture with the motor stator (5) horizontally, center it horizontally so that the centering flange (4) and the tension flange (16) are positioned and fixed on the motor guide rod (2), and tighten them with the fixing nut (3); Step 6: Insert the guide block (10) into the motor rotor (9) to complete the installation.

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