A marine electric auxiliary turbocharger motor bracket structure

Abstract

This utility model discloses a motor bracket structure for a marine electric auxiliary turbocharger, enabling high-precision installation of the motor housing on the electric auxiliary turbocharger. It includes a muffler, a motor bracket, an air intake housing, an air exhaust housing, and a motor housing. One end of the motor bracket is fixedly connected to the air exhaust housing, and the other end is fixedly connected to the muffler. The motor bracket has an internal bracket hub, which, along with the muffler and air intake housing, forms an airflow channel. It also includes multiple motor fixing beams, evenly distributed circumferentially within the inner holes of the bracket hub. Each motor fixing beam is fixedly connected to the bracket hub via a beam support plate. The motor fixing beams have motor housing mounting holes and motor housing limiting bosses. The motor housing has a motor housing mounting platform and a motor threaded hole. The motor housing mounting platform is axially positioned relative to the motor housing limiting boss. The motor housing mounting holes and the motor threaded hole are fixedly connected by motor set bolts.

Description

Technical Field

[0001] This utility model relates to the field of turbocharger technology, and in particular to a motor bracket structure for a marine electric auxiliary 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, striving for higher power density, place demands on turbochargers with high pressure ratios and high efficiency. As boost pressures increase, the matching contradiction between marine diesel engines and turbochargers becomes more pronounced. 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. Currently, a drawback of traditional turbochargers is their relatively slow response speed, making them prone to turbo lag. Electric-assisted turbocharger 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.

[0003] Currently, electric auxiliary turbochargers with large-gap starter-integrated motors at the compressor end are inefficient and require low alignment precision; while small-gap starter-integrated motors are highly efficient but require high alignment precision. Therefore, a suitable motor bracket structure for marine electric auxiliary turbochargers is key to solving these problems and ensuring the design of electric auxiliary turbochargers with small-gap starter-integrated motors. Summary of the Invention

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a motor bracket structure for a marine electric auxiliary turbocharger, so as to achieve high-precision installation of the motor housing on the electric auxiliary turbocharger.

[0005] The purpose of this utility model is achieved as follows: A marine electric auxiliary turbocharger motor bracket structure includes a muffler, a motor bracket, an air intake housing, an air exhaust housing, a motor housing, and motor set bolts. The motor bracket is ring-shaped and has bracket fixing holes. One end of the motor bracket is fixedly connected to the air exhaust housing through the bracket fixing holes. The motor bracket has a muffler positioning ring and a muffler mounting hole. The other end of the motor bracket is aligned with the muffler through the muffler positioning ring, and the motor bracket is fixedly connected to the muffler through the muffler mounting hole. The motor bracket has a bracket hub inside. The bracket hub, muffler, and air intake housing all have inner holes. The inner holes of the bracket hub, muffler, and air intake housing are connected and form an airflow channel. It also includes multiple motor fixing beams arranged axially along the motor bracket. The multiple motor fixing beams are evenly distributed circumferentially in the inner hole of the bracket hub. Each motor fixing beam is fixedly connected to the bracket hub through a beam support plate. Each motor fixing beam is provided with a motor housing mounting hole and a motor housing limiting boss. The motor housing is provided with a corresponding motor housing mounting platform and a motor threaded hole. The motor housing mounting platform is axially positioned at the motor housing limiting boss. The motor housing mounting hole and the motor threaded hole are fixedly connected by motor set bolts.

[0006] Preferably, the motor fixing beam is provided with a first motor housing tool disassembly and assembly screw hole, and the bracket hub is provided with a second motor housing tool disassembly and assembly screw hole. The first and second motor housing tool disassembly and assembly screw holes are used to install motor housing disassembly and assembly tools.

[0007] Preferably, reinforcing ribs are provided between the crossbeam support plate and the motor bracket crossbeam for reinforcement.

[0008] Preferably, the outer edge of the multiple motor fixing beams is fixed with reinforcing ribs.

[0009] Preferably, the bracket hub adopts a hollow structure.

[0010] Preferably, the electric auxiliary turbocharger motor is a small-gap starter-integrated motor.

[0011] By adopting the above technical solution, this utility model solves the problem of high-precision installation and disassembly of the motor housing on the electric auxiliary turbocharger, and adopts a hollow hub structure to reduce the mass of the motor bracket attached to the turbocharger. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a diagram of the motor bracket assembly; Figure 3 Here is a diagram of the motor bracket; Figure 4 This is a cross-sectional view of the motor bracket; Figure 5 For motor housing; Figure 6 This is a schematic diagram of the usage state of this utility model; Figure 7 for Figure 6 A magnified view of a portion of point A in the middle.

[0013] Figure Labels In the attached diagram, 1 is the muffler, 2 is the motor bracket, 2a is the bracket fixing hole, 2b is the muffler mounting hole, 2c is the muffler positioning ring, 2d is the bracket ejector bolt, 2e is the bracket hub, 2f is the crossbeam support plate, 2g is the reinforcing rib, 2h is the motor fixing crossbeam, 2k is the crossbeam reinforcing ring rib, 2m is the first screw hole for disassembling and assembling the motor housing tool, 2n is the second screw hole for disassembling and assembling the motor housing tool, 2p is the motor housing mounting hole, 2q is the motor housing limiting boss, 3 is the air intake housing, 4 is the air exhaust housing, 5 is the motor housing, 5a is the motor housing mounting platform, 5b is the motor threaded hole, 6 is the air circulation channel, 7 is the motor set bolt, 8 is the motor stator, 9 is the motor rotor, and 10 is the turbocharger rotor. Detailed Implementation

[0014] See Figure 1 , Figure 2 As shown, a marine electric auxiliary turbocharger motor support structure specifically includes a muffler 1, a motor support 2, an air intake shell 3, an air exhaust shell 4, a motor housing 5, and a motor set bolt 7.

[0015] See Figure 3 As shown, the motor bracket 2 has twelve bracket fixing holes 2a evenly distributed on it for fixing to the air exhaust shell 4; at the same time, the motor bracket 2 is also provided with a muffler positioning ring 2c and a muffler mounting hole 2b for centering and fixing the muffler 1 to the motor bracket 2. The muffler 1, the motor bracket 2, and the air intake shell 3 form an airflow channel 6 to facilitate smooth air intake of the compressor. The motor bracket 2 adopts a hollow bracket hub 2e to reduce the weight of the motor bracket 2; three motor fixing crossbeams 2h are evenly distributed around the circumference of the motor bracket 2, which are fixed to the bracket hub 2e by crossbeam support plates 2f. The motor bracket crossbeams 2h are reinforced vertically with reinforcing ribs 2g; at the same time, three crossbeam reinforcing ring ribs 2k are added to the motor bracket crossbeams 2h for circumferential fixation to increase the circumferential rigidity of the bracket crossbeams 2h.

[0016] See Figure 4 , Figure 5 As shown, the motor fixing beam 2h has six motor housing mounting holes 2p and a motor housing limiting boss 2q. The motor housing 5 has a motor housing mounting platform 5a and a motor threaded hole 5b. The motor housing 5 is precisely aligned and fixed to the motor fixing beam 2h by the motor set bolts 7. The motor bracket 2 has two evenly distributed motor housing tool disassembly and assembly screw holes 2m and 2n, which are used to install motor housing disassembly and assembly tools to realize the assembly and disassembly of the motor housing 5.

[0017] Specifically: The motor bracket 2 is ring-shaped and has a bracket fixing hole 2a. One end of the motor bracket 2 is fixedly connected to the air exhaust shell 4 through the bracket fixing hole 2a. The motor bracket 2 is provided with a muffler positioning ring 2c and a muffler mounting hole 2b. The other end of the motor bracket 2 is aligned with the muffler 1 through the muffler positioning ring 2c. The motor bracket 2 is fixedly connected to the muffler 1 through the muffler mounting hole 2b. The motor bracket 2 has a bracket hub 2e inside, and the bracket hub 2e adopts a hollow structure. The bracket hub 2e, muffler 1, and air intake housing 3 all have inner holes. The inner holes of the bracket hub 2e, muffler 1, and air intake housing 3 are connected to form an airflow channel 6. It also includes multiple motor fixing beams 2h arranged axially along the motor bracket 2. The multiple motor fixing beams 2h are evenly distributed circumferentially in the inner holes of the bracket hub 2e. Each motor fixing beam 2h is fixedly connected to the bracket hub 2e through a beam support plate 2f. Each motor fixing beam 2h is provided with a motor housing mounting hole 2p and a motor housing limiting boss 2q. The motor housing 5 is provided with a corresponding motor housing mounting platform 5a and a motor threaded hole 5b. The motor housing mounting platform 5a is axially positioned at the motor housing limiting boss 2q. The motor housing mounting hole 2p and the motor threaded hole 5b are fixedly connected by a motor set bolt 7.

[0018] The motor fixing beam 2h is provided with a motor housing tool disassembly and assembly screw hole 1 2m, and the bracket hub 2e is provided with a motor housing tool disassembly and assembly screw hole 2n. The motor housing tool disassembly and assembly screw hole 1 2m and the motor housing tool disassembly and assembly screw hole 2n are used to install motor housing disassembly and assembly tools.

[0019] The electric auxiliary turbocharger motor is a small-gap starter integrated motor.

[0020] See Figure 6 , Figure 7 The turbocharger air intake housing is fixed to the air exhaust housing, with a certain gap between it and the turbine rotor to ensure normal rotation of the turbocharger rotor. The motor stator housing is fixed to the motor bracket, which in turn is fixed to the air exhaust housing. The motor rotor is coaxially fixed to the turbocharger rotor, achieving a small air gap L design between the motor and rotor, thus solving the accuracy problem of centering and installing the motor housing of the electric-assisted turbocharger.

[0021] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A marine electric auxiliary turbocharger motor support structure, characterized in that: This includes the muffler, motor bracket, air intake housing, air exhaust housing, motor housing, and motor set bolts. The motor bracket is ring-shaped and has bracket fixing holes. One end of the motor bracket is fixedly connected to the air exhaust housing through the bracket fixing holes. The motor bracket has a muffler positioning ring and a muffler mounting hole. The other end of the motor bracket is aligned with the muffler through the muffler positioning ring, and the motor bracket is fixedly connected to the muffler through the muffler mounting hole. The motor bracket has a bracket hub inside. The bracket hub, muffler, and air intake housing all have inner holes. The inner holes of the bracket hub, muffler, and air intake housing are connected and form an airflow channel. It also includes multiple motor fixing beams arranged axially along the motor bracket. The multiple motor fixing beams are evenly distributed circumferentially in the inner hole of the bracket hub. Each motor fixing beam is fixedly connected to the bracket hub through a beam support plate. Each motor fixing beam is provided with a motor housing mounting hole and a motor housing limiting boss. The motor housing is provided with a corresponding motor housing mounting platform and a motor threaded hole. The motor housing mounting platform is axially positioned at the motor housing limiting boss. The motor housing mounting hole and the motor threaded hole are fixedly connected by motor set bolts.

2. The marine electric auxiliary turbocharger motor bracket structure according to claim 1, characterized in that: The motor mounting beam has a first motor housing tool disassembly and assembly screw hole, and the bracket hub has a second motor housing tool disassembly and assembly screw hole. The first and second motor housing tool disassembly and assembly screw holes are used to install motor housing disassembly and assembly tools.

3. The marine electric auxiliary turbocharger motor bracket structure according to claim 1, characterized in that: Reinforcing ribs are installed between the crossbeam support plate and the motor bracket crossbeam for reinforcement.

4. The marine electric auxiliary turbocharger motor bracket structure according to claim 1, characterized in that: The outer edge of the multi-motor fixing beam is fixed with a reinforcing ring rib.

5. The marine electric auxiliary turbocharger motor bracket structure according to claim 1, characterized in that: The bracket hub features a hollow structure.

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