JP2000145469A - Assembling method for turbocharger having generator/ motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an assembling method for a turbocharger provided with a generator/motor permitting an efficient assembly work by polarizing a rotor fit to a shaft and assembling major rotating parts in an incorporated condition into a center-housing. SOLUTION: A shaft temporary assembled body is obtained by fitting major rotating parts of a turbocharger including a rotor 16 under a non-polarized condition to a shaft. The rotating parts are rotationally balanced. After the temporarily assembled shaft is balanced, the rotor 16 is polarized by a polarizer 91 a state where a compressor blade is removed for the reasons of mounting the assembly to a housing. The rotating part assembled body 90 having the magnetized rotor 16 is fit to the housing together with the compressor blade.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for assembling a turbocharger having a power generator and a motor for supercharging intake air and converting exhaust gas energy into electric energy to recover energy.

[0002]

2. Description of the Related Art Generally, a turbocharger uses a turbine driven by exhaust gas energy of an engine to drive a compressor to increase intake air for the purpose of improving output during high-speed rotation of the engine or high-load operation. To pay. Some engines equipped with a turbocharger include a turbocharger having a turbine driven by exhaust gas energy, a shaft having the turbine attached thereto, and a compressor attached to the shaft. In addition, an energy recovery device including a turbine driven by exhaust gas energy, a shaft mounted with the turbine, a compressor mounted on the shaft, and a generator / motor mounted on the shaft has been proposed for a turbocharger provided in the engine. ing. In addition, a heat-insulated engine equipped with a turbocharger has been proposed in which a turbocharger having a generator / motor is disposed in an exhaust system and an energy recovery device having a power generation turbine disposed downstream of the turbocharger. .

[0003] A turbocharger having a generator / motor as a means for recovering exhaust gas energy as electric energy by driving a turbine by exhaust gas energy of a vehicle engine and generating electric power by a generator connected to the turbine. There is. FIG. 4 is a sectional view showing a turbocharger provided with a conventional generator / motor. The turbocharger 60 shown in FIG. 4 has a turbine 2 driven by the exhaust gas energy of the engine, a shaft 4 having the turbine 2 attached thereto, and a compressor 3 attached to the shaft 4. Turbocharger 6
The housing No. 0 includes a turbine housing 12 for housing the turbine 2, a compressor housing 13 for housing the compressor 3, and both housings 12 between the turbine housing 12 and the compressor housing 13.
13 are connected to each other. The shaft 4 penetrating the housing is rotatably supported by bearings 10 and 11 provided at both ends of the center housing 8. A turbine blade 7 is attached to the shaft 4 at an end on the turbine 2 side, and a compressor blade 9 is attached to an end on the compressor 3 side. The center housing 8 is
It is composed of a turbine side center housing 14 fixed to the turbine housing 12 and a compressor side center housing 15 to which the compressor housing 13 is fixed. A heat shield plate 28 is interposed between the turbine housing 12 and the turbine side center housing 14.

The exhaust gas sent to the turbine scroll 6 through the exhaust pipe of the engine is supplied to the turbine 2 of the turbocharger 60 to rotate the turbine blade 7.
The rotation of the turbine blade 7 is transmitted to the compressor 3 via the shaft 4, and the compressor 3 rotates the compressor blade 9 to supercharge, that is, compresses air and supplies the air to the engine.

The shaft 4 rotates at a high speed of 100,000 to 200,000 rpm and generates an axial force in the thrust direction. Therefore, the shaft 4 is stably supported not only in the radial direction but also in the thrust direction. For the shaft 4
Angular type ball bearings are used for the bearings 10 and 11 which support. Further, lubricating oil is supplied to the bearings 10 and 11 to enable the shaft 4 to rotate at high speed.
The lubricating oil is supplied through an oil supply passage 45 formed in the turbine-side center housing 14 and the compressor-side center housing 15, and after lubricating the bearings 10 and 11, is discharged to the outside of the turbocharger 60 through an oil discharge passage 75. You.

[0006] Turbocharger 6 equipped with a generator / motor
The zero generator 5 is housed in the turbine side center housing 14 between the turbine 2 and the compressor 3. The generator 5 includes a rotor 16 composed of a permanent magnet mounted on the shaft 4 driven by exhaust energy and rotating together with the shaft 4, a stator 17 mounted around the rotor 16 by press-fitting into the center housing 8. Consists of The stator 17 is configured by attaching a winding to a stator core. The rotor 16 is disposed between bearings 10 and 11 that support the shaft 4.
The generator 5 converts a part of the output of the turbine 2 driven by the exhaust gas into electric energy, and drives a motor attached to the engine with the electric power, thereby realizing the recovery of the exhaust gas energy and the fuel efficiency. Is being improved. In order to prevent the rotor 16 from bursting during high-speed rotation, a reinforcing sleeve 18 made of carbon fiber reinforced plastic as a reinforcing member is fitted around the rotor 16. The turbine side center housing 14 includes a turbine vicinity 25 near the turbine 2 side, a cylindrical stator mounting portion 27, and a turbine vicinity 25 and a stator mounting portion 27.
The stator 17 is mounted on the cylindrical inner surface 19 of the cylindrical stator mounting portion 27 by press-fitting.

Since the turbine side center housing 14 is connected to the turbine housing 12 into which high-temperature exhaust gas from the engine is introduced, the turbine housing 12 becomes high in temperature due to heat conduction from the turbine housing 12 during operation of the turbocharger. Easy to be. Further, in the turbocharger 60 provided with the generator / motor, the shaft 4 becomes high temperature because the turbine 2 is driven by the flow of the exhaust gas.
The permanent magnet, which is the rotor 16 mounted on the shaft 4, may also be heated to a high temperature by the heat transmitted from the shaft 4 and may be demagnetized. The lubricating oil also has a cooling function of preventing the bearing 10 from becoming hot due to heat or the like transmitted from the turbine side.

When assembling a turbocharger having a generator / motor, first, a turbine 2, a compressor 3,
A balance is maintained for each component constituting the rotating portion of the turbocharger, such as the rotor 16 to be a permanent magnet. Of the parts thus balanced, the rotating part of the turbocharger, ie the turbine 2,
The rotor 16, the bearings 10, 11, the spacer 76, the sleeve 77, the compressor 3, and the shaft end nut 78 are assembled to the shaft 4. In this state, the shaft 4 and the shaft 4
Checking the bending of the assembly and correcting the balance. The sleeve 77 and the shaft end nut 78 constitute fixing means for fixing the compressor blade 9 to the shaft 4.

The assembly whose balance has been corrected and assembled on the shaft 4 is once disassembled, and only the rotor 16 is magnetized by the magnetizing device. The shaft 4 is re-inserted into the center housing 8, and thereafter, the rotor 16 which has been magnetized to become a permanent magnet, the spacer 76, the bearing 10,
11 and the sleeve 77 are assembled. At this time,
The rotor 16 as a permanent magnet is attracted to the stator 17 and the center housing 8 made of magnetic metal,
The rotor 16 may be difficult to assemble, or a permanent magnet fragment may be generated when the rotor 16 is attracted to the stator 17 or the center housing 8, and may enter a part such as a bearing that requires high sealing performance. There is also. As for the assembly composed of the shaft 4 and the rotating part assembled therearound, the balance as the rotating body is once taken and then disassembled.
Since the reassembly is performed, an unbalance is likely to occur in the rotating portion of the turbocharger after the reassembly, and it may be difficult to rotate the turbocharger at high speed.

A conventional turbocharger is provided with a generator / motor of a type in which a generator section is disposed at a portion of a shaft supported by a center housing and protruding from a side opposite to a turbine housing. The play of the rotor composed of the magnetic poles is shifted from the magnetic center position of the stator core to the magnetic center position of the stator core, and by applying a magnetic force to the rotating rotor in the thrust direction from the stator core, the cylindrical tube and There is one in which the balance of the rotor is improved by absorbing backlash caused by a difference in centrifugal force and a coefficient of thermal expansion acting on the cylindrical magnetic pole (see Japanese Patent Application Laid-Open No. 2-298627).

As an example of a turbocharger for driving a generator with a driving force obtained by a turbine, by supplying exhaust gas to a large turbine or a small turbine arranged coaxially according to the rotation speed of a rotating shaft, There is an engine designed to maintain a high turbine efficiency by changing the amount of exhaust gas (see Japanese Patent Application Laid-Open No. 2-181515).

Further, as another example of a turbocharger provided with a generator / motor, an outer shaft having a hollow shaft rotatable on the same central axis and independently of the shaft is provided on the outer periphery of the shaft, and the outer shaft is provided with a power generator. There is a turbine provided with a mechanical turbine and a generator rotor (JP-A-6-288).
242). In this turbocharger, a turbine for driving a compressor and a turbine for a generator are arranged in series along the flow of exhaust gas. The outer shaft for the casing and the shaft for the outer shaft are rotatably supported by bearings. The shaft is rotatably supported in the thrust direction with respect to the center housing via a thrust bearing attached to the shaft by a nut. Further, the outer shaft is rotatably supported in the thrust direction by a center housing via a thrust bearing.

[0013]

A problem that arises with respect to the above assembling work is that a rotor composed of a magnetic material that has not been magnetized yet is assembled together with other rotating parts, and a rotating assembly is disassembled and rotated. This is caused by reassembling the rotating assembly after magnetizing the rotor. Accordingly, the rotor is magnetized with the rotor mounted on the shaft in advance, and the main rotating part including the shaft and the rotor is integrated into the center housing in a state of being integrated, thereby disassembling and reassembling the assembly. There is a problem to be solved in that there is no need to perform the work of performing the above, and the efficiency of the work of assembling a turbocharger having a generator / motor is improved.

[0014]

SUMMARY OF THE INVENTION An object of the present invention is to provide a generator / motor for converting the energy of exhaust gas discharged from an engine into electric energy and recovering the energy of the exhaust gas in the form of electric energy. In a turbocharger, the magnetized rotor is easily assembled to the housing, and when the magnetized rotor is assembled to the housing, the rotor is prevented from colliding with the housing and generating fragments of permanent magnets. Another object of the present invention is to provide a method of assembling a turbocharger including a generator / motor, which enables the rotating assembly to be assembled with a good balance.

According to the present invention, a turbine disposed in a housing and driven by exhaust gas energy, a compressor disposed in the housing, a shaft connecting the turbine and the compressor and rotatably mounted in the housing. In a method for assembling a turbocharger including a supported shaft and a generator / motor comprising a generator / motor rotor mounted on the shaft and a stator mounted in the housing, an unmagnetized state is provided. Assembling a temporary shaft assembly by assembling at least a temporary assembly component of a turbocharger including the generator / motor including the rotor and the shaft, wherein the rotating portion of the temporary shaft assembly is Balancing the rotation of the shaft, wherein the shaft is mounted on the shaft. The present invention relates to a method for assembling a turbocharger including a generator / motor, comprising: a step of magnetizing a trochanter; and a step of assembling the temporary assembly including the magnetized rotor attached to the shaft to the housing. .

According to the method of assembling a turbocharger provided with the generator / motor, a temporary shaft assembly is assembled by attaching the rotating portion of the turbocharger including the unmagnetized rotor to the shaft. The rotational balance of the rotating portion of the shaft temporary assembly assembled in the above is taken. In this way, the rotor of the shaft temporary assembly once rotationally balanced is magnetized by the magnetizing device while being attached to the shaft. The magnetized rotor is assembled to the housing together with other temporary assembly parts. Since the rotational balance of the rotating part of the turbocharger has already been taken, a turbocharger equipped with a completed generator / motor can be obtained when assembled to the housing.

The temporary assembly part constituting the shaft temporary assembly includes the shaft, the rotor mounted on the shaft, and the rotor on the shaft for rotatably supporting the shaft in the housing. A pair of bearings respectively mounted at two positions axially spaced from each other, and disposed on the shaft between the bearings and the rotor to regulate the axial position of the rotor. A pair of spacers, a damper ring disposed outside the bearing for buffering and supporting the bearing in the housing, and a shaft close to the damper ring for sealing a gap between the shaft and the housing. Sealing means disposed on the turbine, a turbine blade disposed at the turbine-side end of the shaft, Compressor blade is disposed presser side, and the compressor blade is fixing means for fixing on the shaft.

[0018] The seal means provided on the turbine side is provided with a seal plate provided slidably relative to the shaft, and a seal plate provided in a circumferential groove formed in the shaft. It is composed of a seal ring arranged to be relatively slidable.

The fixing means includes a sleeve mounted on the shaft so as to be in contact with the bearing on the compressor side, and the compressor blade is screwed to a shaft end of the shaft on the compressor side and the sleeve. Is a shaft end screw for holding the shaft.

The housing includes a turbine housing having the turbine disposed therein, a compressor housing having the compressor disposed therein, and a center housing having the turbine housing and the compressor housing fixed to both ends, respectively. Yes,
The center housing includes a turbine-side center housing and a compressor-side center housing. One of the bearings is disposed in the turbine-side center housing, and the other bearing is disposed in the compressor-side center housing.

After the step of balancing the rotation of the temporary shaft assembly and before the step of magnetizing the rotor, the compressor blade and the fixing means are removed from the temporary shaft assembly by the shaft. And a step of forming a rotor assembly by removing the rotor from the rotor. The magnetizing of the rotor is performed on the rotor assembled as the rotor assembly.

[0022] In the step of assembling the temporary assembly including the magnetized rotor attached to the shaft to the housing, the rotating body assembly is mounted in the housing. A compressor blade is assembled to the shaft by the fixing means.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for assembling a turbocharger provided with a generator / motor according to the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an example of a turbocharger provided with a generator / motor assembled by an assembling method according to the present invention. The power generation shown in FIG.
In the turbocharger equipped with the electric motor, the same reference numerals are given to the same components and parts as those of the turbocharger 60 equipped with the generator / motor shown in FIG. I do.

In a turbocharger 1 equipped with a generator / motor shown in FIG. 1 (hereinafter abbreviated as “turbocharger 1” in the description of the embodiment), a shaft 4 which is a solid shaft is used.
Are rotatably supported by bearings 10 and 11 which are angular type ball bearings provided in the turbine side center housing 14 and the compressor side center housing 15, respectively. The bearings 10 and 11 are arranged at a sufficient distance from each other in the axial direction of the shaft 4 so that the rotor 16 can be arranged between the bearings 10 and 11. Spacer 76 disposed between
Regulated by The stator 17 generates an electromotive force in accordance with a change in magnetic flux of the permanent magnet, which is the rotor 16, as the shaft 4 rotates. In turbocharger 1,
Exhaust turbine scroll 6 in turbine housing 12
An exhaust gas flow is introduced through the shaft 4 to rotate a turbine blade 7 fixed to one end of the shaft 4.

An annular concave portion having an inner peripheral surface 46 and an end surface 47 is formed in an end wall 14b on the turbine 2 side of the turbine side center housing 14, and a seal plate 49 is press-fitted into the concave portion from the turbine 2 side. It is attached. A seal ring 5 is provided in a circumferential groove formed in the shaft 4.
3 is provided, and is in sliding contact with the seal plate 49;
It has a sealing function of preventing the lubricating oil that has lubricated and cooled the bearing 10 from leaking to the turbine 2 side. Lubricating oil from an oil supply passage 45 formed in the turbine-side center housing 14 is jetted toward the bearing 10, and
Lubrication and cooling. The bearing 10 and the seal plate 4 are provided on the inner peripheral surface of the turbine side center housing 14.
9, a damper ring 30 is mounted. The damper ring 30 supplies a part of the lubricating oil supplied to the bearing 10 for lubrication and cooling to a gap between the turbine side center housing 14 and the seal plate 49.
The vibration of the shaft 4 is reduced by the buffering and damping action of the oil film formed by the lubricating oil in these gaps.
Absorption absorbs the high-speed rotation of the shaft 4. Also on the bearing 11 side, the compressor side center housing 1
5, a damper ring 30 having a similar structure is arranged.

Since the turbine 2 is driven by the flow of the exhaust gas, the temperature of the shaft 4 becomes high, and the permanent magnet as the rotor 16 mounted on the shaft 4 also becomes high in temperature and may be demagnetized. The lubricating oil injected toward the bearing 10 also serves to cool the shaft 4. The lubricating oil that is jetted toward the bearing 10 also transmits heat to the seal ring 53 of the seal plate 49, and releases the heat of the shaft 4 to the turbine side center housing 14. In order to improve these cooling performances, the turbine vicinity 2 located on the turbine-side center housing 14 on the side closer to the turbine 2.
5 is a turbine-side water jacket 5 into which cooling water is introduced.
5 are formed.

The stator 17, which is a stator coil, generates heat due to a change in magnetic flux traversing the stator 17 and a current flowing through the coil of the stator 17, and as a result, the power generation performance of the stator 17 is reduced and sufficient power is generated. May not be taken out. In order to deal with such a situation, the stator 1
7 on which the turbine side center housing 1 is mounted
A water jacket 57 is formed inside the stator mounting portion 27 of No. 4 so as to surround the stator 17. In this embodiment, the water jacket 57 is provided between the turbine-side center housing 14 near the turbine 25 and the stator mounting portion 27.
Are connected to a turbine-side water jacket 55 formed in the turbine vicinity 25 through a communication passage 56 formed inside the connecting portion 26 that integrally connects the two.

The vicinity 25 of the turbine is forcibly cooled by the cooling water flowing through the turbine-side water jacket 55.
Therefore, the temperature of the bearing 10 and the shaft 4 does not become high, and the durability of the bearing 10 and the lubricating oil is not reduced, and the permanent magnet of the rotor 16 is not demagnetized. Further, the cooling water flowing through the turbine-side water jacket 55 also flows through the water jacket 57 formed inside the stator mounting portion 27 through the communication passage 56, so that the cooling water in the water jacket 57 is The mounting portion 27 is forcibly cooled to prevent the efficiency of the power generated from the stator 17 from being reduced.

The turbocharger 1 itself operates as follows. In the turbocharger 1, exhaust gas from an engine (not shown) is introduced from the turbine scroll 6 into the turbine housing 12, so that the exhaust gas acts on the turbine blades 7 to drive the turbine 2. The compressor 3 is driven through the shaft 4 by driving the turbine 2, and the intake air is supercharged to the engine by rotating the compressor blade 9 of the compressor 3. Rotor 1 attached to shaft 4
The permanent magnet 6 rotates and the generator 5 generates power. The generator 5 generates an amount corresponding to consumption or power storage according to the operation state of the engine, but when the power is not used, the rotor 16 only idles.

Next, a method of assembling a turbocharger having a generator / motor according to the present invention will be described with reference to FIGS. FIG. 2 is an explanatory view showing a rotor magnetizing step in the method of assembling the turbocharger provided with the generator / motor shown in FIG. 1, and FIG. 3 is a view showing the method of assembling the turbocharger provided with the generator / motor according to the present invention. It is an assembly flowchart.

First, a temporary assembly part constituting at least a rotating part of the turbocharger 1 including the unmagnetized rotor 16 and the shaft 4 is assembled to assemble a shaft temporary assembly (step 1 in FIG. 3). . Before assembling the rotating portion of the turbocharger, the seal plate 49, the seal ring 53 and the damper ring 30 are assembled to the shaft 4. Thereafter, temporary assembly parts constituting at least the rotating part of the turbocharger 1 are assembled by sequentially attaching them around the shaft 4 so as to have the same arrangement relationship as the completed turbocharger. That is, the bearing 10, one spacer 76, and the unmagnetized rotor 1
6, the other spacer 76 and the bearing 11 are sequentially mounted on the shaft 4, and the sleeve 77 and the compressor blade 9 are further mounted on the outside of the bearing 11 in order, and the shaft end nut 78 is tightened to connect the compressor blade 9 with the sleeve 77. The shaft temporary assembly is assembled by being sandwiched between them. The shaft temporary assembly corresponds to a rotating body assembly 90 shown in FIG. 2 to which a sleeve 77, a compressor blade 9 and a shaft end nut 78 are attached.

Next, balance correction is performed on the rotating portion of the temporary shaft assembly to balance the rotation of the rotating portion of the turbocharger so as to enable high-speed rotation (step 2). By balancing the rotation, the shaft 4
In addition, the rotating parts such as the rotor 16 can be rotated at a high speed without causing vibration on the shaft.

Next, from the shaft temporary assembly to the sleeve 7
7, the compressor blade 9, and the shaft end nut 78 are removed to form the rotating body assembly 90 (step 3), and the shaft 4
The rotor 16 still attached to the rotor 16 is magnetized by the magnetizing device 91 shown in FIG. 2 (step 4). The magnetizing device 91 includes a magnetizing yoke 93 to which power is supplied from a magnetizing power supply 92. The rotor 16 is magnetized by strong magnetic lines of force generated from the magnetized yoke 93. Here, since the inner races (inner rings) of the bearings 10 and 11 are attached to the shaft 4 by press fitting, the rotor 16 and the spacer 76 do not move in the axial direction with respect to the shaft 4.

When the magnetization of the rotor 16 is completed, the rotor 1
Rotor assembly 9 with 6 attached to shaft 4
0 is assembled to the turbine side center housing 14. Since the rotating body assembly 90 has been assembled, the seal plate 49 assembled on the shaft 4 is pressed into the inner peripheral surface 46 of the turbine-side center housing 14 of the center housing 8 until the end surface 47 is brought into contact ( Step 5). Thereafter, the compressor-side center housing 15 is fitted and attached to the turbine-side center housing 14 (step 6), and further, the sleeve 77, the compressor blade 9, and the shaft end nut 78 which are in a detached state.
Is attached to the shaft 4 to complete the assembly of the turbocharger 1 (step 7).

As shown in FIG. 1, a reinforcing sleeve 1 for preventing bursting is provided on the outer diameter of the rotor 16 or on the outer periphery of the rotor 16.
8 is fitted, the outer diameter d ₁ of the reinforcing sleeve 18 is
Is set smaller than the bearing support portion 14a inside diameter d ₂ of which is formed on the turbine side center housing 14 for housing the bearings 10, 11 and the damper ring 30. Therefore, the rotating body assembly 90, as viewed in FIG.
It can be loaded into the turbine side center housing 14 through the bearing support 14a from the side. Further, the outer diameter d ₃ of the seal plate 49 is larger than the inner diameter d ₂ of the bearing support portion 14a, and when the seal plate 49 is pressed into the inner peripheral surface 46 of the turbine side center housing 14, the rotating body assembly 9
Thus, the loading of the turbine center center housing 14 is completed.

In the above embodiment, the AC machine including the rotor 16 and the stator 17 has been described as a generator. However, an electric current is supplied to the stator 17 and the AC machine is used as a motor, and the exhaust gas of the engine is sufficient. When it cannot be used, the supercharging by driving the compressor may be performed by an electric motor.
In the above embodiment, the rotating body assembly 90 is loaded from the turbine 2 side. However, the rotating body assembly 90 may be loaded from the compressor 3 side. In this case, a rotating body assembly with the compressor blade 9 attached to the shaft 4 is assembled, and a seal plate 49 is provided on the compressor 3 side. Also, the seal plate 49
Is changed to a structure that is press-fitted into the bearing support portion 15a of the compressor side center housing 15.

[0037]

The method for assembling a turbocharger provided with a generator / motor according to the present invention is configured as described above and has the following effects. That is, in the method of assembling the turbocharger provided with the generator / motor, since the magnetized rotor is assembled as a rotor assembly integrated with the shaft, the stator made of magnetic metal is used. Or if it is drawn to the center housing,
By adjusting the position of the shaft, it is easy to assemble the rotating body assembly, and the rotor does not collide with the stator or the center housing to generate fragments of the permanent magnet. In addition, since the rotating body assembly is assembled to the center housing in a state where the rotation balance is good, there is no imbalance in the rotating part of the turbocharger after assembly, and the turbocharger can be rotated at high speed. it can.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a turbocharger provided with a generator / motor according to the present invention.

FIG. 2 is an explanatory diagram showing a magnetizing step of a rotor in a method of assembling a turbocharger including a generator / motor according to the present invention.

FIG. 3 is an assembling flowchart showing a procedure of an assembling method of a turbocharger including a generator / motor according to the present invention.

FIG. 4 is a cross-sectional view showing a turbocharger provided with a conventional generator / motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Turbocharger provided with generator / motor 2 Turbine 3 Compressor 4 Shaft 5 Generator 7 Turbine blade 8 Center housing 10, 11 Bearing 12 Turbine housing 13 Compressor housing 14 Turbine side center housing 14a Supporting part 15 Compressor side center housing 15a Supporting part Reference Signs List 16 Rotor 17 Stator 18 Reinforcement sleeve 30 Damper ring 46 Inner peripheral surface 47 End surface 49 Seal plate 53 Seal ring 76 Spacer 77 Sleeve 78 Shaft end nut 90 Rotating body assembly 91 Magnetizing device

Claims (7)

[Claims] A turbine disposed in a housing and driven by exhaust gas energy; a compressor disposed in the housing; a turbine connected to the turbine and the compressor and rotatably supported in the housing. A method for assembling a turbocharger including a shaft and a generator / motor comprising a generator / motor rotor mounted on the shaft and a stator mounted in the housing. Assembling a temporary shaft assembly by assembling at least a temporary assembly part of a turbocharger including the generator / motor including a rotor and the shaft; rotating the rotary portion in the temporary shaft assembly; Balancing step, magnetizing the rotor attached to the shaft And a step of assembling the temporary assembly including the magnetized rotor attached to the shaft to the housing. 2. The temporary assembly part of the shaft temporary assembly includes the shaft, the rotor mounted on the shaft, and the shaft on the shaft for rotatably supporting the shaft in the housing. A pair of bearings respectively mounted at two axially spaced positions sandwiching the rotor, and a pair of bearings disposed between the bearings and the rotor on the shaft to regulate the axial position of the rotor. A pair of spacers, a damper ring disposed outside the bearing for buffering and supporting the bearing in the housing, and a damper ring close to the damper ring for sealing a gap between the shaft and the housing. Sealing means disposed on the shaft, a turbine blade disposed at the turbine-side end of the shaft,
The turbocharger assembling method according to claim 1, further comprising a compressor blade disposed on the compressor side of the shaft, and fixing means for fixing the compressor blade on the shaft. 3. The seal means disposed on the turbine side is a seal plate disposed slidably with respect to the shaft, and the seal plate is disposed in a circumferential groove formed in the shaft. 3. The method for assembling a turbocharger provided with a generator / motor according to claim 2, comprising a seal ring disposed so as to be relatively slidable with the turbocharger. 4. The fixing means includes a sleeve mounted on the shaft so as to be in contact with the bearing on the compressor side, and the sleeve screwed to a shaft end of the shaft on the compressor side and the sleeve. The method for assembling a turbocharger provided with a generator / motor according to claim 2 or 3, comprising a shaft end screw for holding the compressor blade. 5. The housing comprises a turbine housing having the turbine disposed therein, a compressor housing having the compressor disposed therein, and a center housing having the turbine housing and the compressor housing fixed to both ends, respectively. The center housing includes a turbine-side center housing and a compressor-side center housing. One of the bearings is disposed in the turbine-side center housing, and the other bearing is disposed in the compressor-side center housing. Claim 2 comprising being arranged
A method for assembling a turbocharger provided with the power generator and the electric motor according to any one of claims 4 to 7. 6. The compressor blade and the fixing means are removed from the temporary shaft assembly after the step of balancing the rotation of the temporary shaft assembly and before the step of magnetizing the rotor. A step of removing the shaft from the shaft to form a rotor assembly, wherein the magnetizing of the rotor is performed on the rotor assembled as the rotor assembly. A method for assembling a turbocharger provided with the generator / motor according to any one of claims 2 to 5. 7. In the step of assembling the temporary assembly including the magnetized rotor attached to the shaft to the housing, the rotating body assembly is mounted in the housing. 7. The method of assembling a turbocharger with a generator / motor according to claim 6, wherein the compressor blade is assembled to the shaft by the fixing means.