JPS60197144A - Generator apparatus - Google Patents

Abstract

PURPOSE:To prevent a magnet rotor from deforming by engaging a rare earth magnet rotor on the outer periphery of a rotor of a generator apparatus, holding the both ends by suppressing members, and winding fixedly carbon strands on the outer periphery of the rotor. CONSTITUTION:An exhaust gas turbine 1 of a generator apparatus has a turbine housing 2 including a scroll 2a and a turbine impeller 3. The impeller 3 is rotated by the energy of the introduced exhaust gas to rotate a rotor shaft 11 of a generator 10 integrated with the impeller shaft 3a, thereby generating. The generator 10 has a magnet rotor 14 engaged with the shaft 11 and a stator core 15b. In this case, a rare earth magnet rotor having strong magnetic force is used as the rotor 13, the both ends are held by ring-shaped retainers 13, and the outer periphery of the rotor is wound fixedly with a carbon strand 33.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a power generation device that can recover and utilize exhaust gas energy from an internal combustion engine.

(Prior art) For example, as a method of converting the exhaust gas energy of an automobile internal combustion engine into actual torque or power and recovering it, the exhaust gas energy is used to rotate an exhaust turbine, and the rotational force is transferred to the internal combustion engine through a gear train. Attempts have been made to collect it on the crankshaft.

However, with this exhaust gas energy recovery method, followability to rotational fluctuations is poor, and
Because the rotational speed of the exhaust turbine is extremely high, it is difficult to put into practical use a speed reduction device to reduce the speed because it complicates the configuration and deteriorates power transmission efficiency, so it has not yet reached the stage of practical use. .

On the other hand, the higher the rotation speed of the generator rotor, the greater the power generation capacity of a generator. Therefore, driving the generator with an exhaust turbine that rotates at high speed using exhaust energy is the most effective means of efficiently utilizing exhaust energy. It can be said.

(Problems with the two conventional techniques) However, for example, when a synchronous generator is driven by an exhaust turbine to supply regenerative energy to an internal combustion engine, the induced voltage is extracted from the rotor winding via brushes, or Generally, it is obtained from a stator winding placed around a permanent magnet rotor, and although the rotor speed is around 3000 rotations like in a normal generator, it is 200 rotations.
At high speeds of 0.00 rpm or higher, damage due to increased friction, friction, or sliding shock cannot be avoided.

In addition, in generators using permanent magnet rotors, the magnetic force of the metal permanent magnet itself is small, so it is not possible to secure a 1-minute larger amount of power generation, and large-capacity generators are often used.

(IJ aspect of the invention) The present invention was made in view of such conventional drawbacks, and an object of the present invention is to provide a power generation device that can rotate at high speed and secure a sufficiently large amount of power generation.

(Summary of the Invention) In order to achieve this object, the present invention is a power generation device connected to a turbine driven by exhaust gas energy of an internal combustion engine, in which a rare earth magnet rotor is fitted on the outer periphery of the rotor shaft, Both end faces of the magnetic rotor are held by presser members attached to the rotor shaft, and the outer circumferential surface of the magnetic rotor is wound and hardened with carbon main wire, thereby enabling high-speed rotation and generating sufficient magnetic force. That is.

(Example) Next, an example of the power generation device according to the present invention will be described in detail with reference to the drawings.

1,000→In the figure, l is the exhaust turbine, and the scroll part 2
a, and a turbine impeller 3 disposed within the housing 2, the scroll portion 2a is connected to an exhaust pipe of an internal combustion engine, and the scroll portion 2a is connected to an exhaust pipe of an internal combustion engine.
The turbine impeller 3 is rotated by the energy of the exhaust gas introduced into a, and the exhaust gas is discharged from an exhaust outlet 26 provided in the axial direction through an exhaust pipe (not shown).

A heat insulating wall 5 made of heat-resistant metal such as stainless steel is attached to the inner wall of the scroll portion 2a through a heat insulating material 4 such as ceramic fiber, and the inner wall of the discharge side cylindrical portion of the /X housing 2 is equipped with: A stage heat guide 6 made of a heat insulating material such as a ceramic material is provided to prevent heat dissipation of exhaust gas.

The turbine impeller indicated by l- has an impeller shaft 3a integrally, and this is connected to a rotor shaft ll of a generator lO, which will be described later.
It is integrally formed with ceramic material. Here, the rotor shaft 11 is made of a ceramic material having a high Young's modulus, such as thermeft, which prevents centrifugal deformation due to unbalanced mass at high speeds.

Reference numeral 8 denotes a clamping plate 31 that is disposed on the side of the turbine housing 2 via a heat insulating material 9 and is tightened by a port 32.
Bearing fixed in the housing, port 1 to this
2, we were able to access the generator lO.

Power generation I! Reference numeral 10 denotes a rotor shaft 11, a rare earth magnet rotor 14 with strong magnetic force fitted and coupled to the rotor shaft 11, and a stator coil 15a disposed opposite to the outside of the magnet rotor.
The magnet rotor 14 shown in 1., which is constituted by a stator core 15b and a bearing housing 16 that rotatably supports one end of the roller shaft 11, has a magnetic force that is much stronger than that of ordinary magnets, and has a residual magnetic force. Magnetic flux density Br is 50
00-9500 w b / cm, holding power 45
00 to 9500 A/m, making it optimal as a magnet, but its transverse rupture strength and tensile strength are extremely small, and it cannot be used as is as a magnet rotor for a high-speed generator that is subject to large centrifugal forces.

For this reason, the magnet rotor 14 is attached to the rotor shaft 11 so that both end surfaces thereof are made of ring-shaped plates and are held by the holding member 13 made of high-strength titanium, high-strength aluminum alloy, etc. It is being

Further, on the outer periphery of the magnet rotor 14, each of the above-mentioned holding members 1 is provided.
The carbon wire 33 such as carbon fiber spliced into the wire 3 is rolled and solidified to a thickness of, for example, about 1 to 2 mm.

A fixed bearing 20 and a floating metal 21 are provided in each of the bearing housings 8 and 16, and the floating metal 21 rotatably supports both ends of the rotor shaft 11, and also supports the fixed bearing 20 from itself.
Rotate inward. Furthermore, each of the fixed bearings 20 and the floating metal 21 is provided with lubricating oil passages 20a, 21a, etc. for lubricating and cooling the sliding contact surfaces between the floating metal 21 and the rotor shaft 11. There is.

In addition, 22 is the rotor shaft 11 of the floating metal 21.
23 is a thrust bearing of the rotor shaft 11, 25 is a positioning ring, 24 is a cover that closes the bearing portion at the right end of the rotor shaft ti, and 26 is an oil seal ring.

The power generation device of the present invention is constructed as follows, in which the exhaust gas of the internal combustion engine introduced into the scroll portion 2a of the exhaust turbine 1 acts on the turbine impeller 3, and the exhaust gas 26
This exhaust gas energy causes the turbine impeller 3 to rotate at high speed. This rotation is directly transmitted to the rotor shaft 11 which is integrated with the turbine impeller shaft 3a, and the magnetic inverter 14 rotates at high speed, allowing efficient power generation.

In particular, the magnet rotor 14 is made of rare earth magnets.

Due to its strong magnetic force, it can generate a large amount of power even when rotating at high speeds.

In addition, since the outer periphery of the magnetic rotor 14 of this type is covered with carbon wire 33, it is possible to prevent the rotor 14 from being displaced outwardly or collapsing due to centrifugal force, and the holding member 13 It is also possible to reliably prevent displacement and collapse in the thrust direction due to In other words, by wrapping even a weak rare earth magnet with the holding member 13 and the carbon wire 33, it is possible to obtain a thin and high-strength magnet rotor 14.

Note that this magnet rotor 14 has a cylindrical shape that is fitted around the rotor shaft 11, and has low windage loss during high-speed rotation, making it an ideal generator rotor.

Furthermore, in this embodiment, if the turbine impeller 3, impeller shaft 3a, and rotor shaft 11 are made of ceramic material,
The entire rotating system can be made lighter, and each axis 3a, 1 due to centrifugal force
1 deformation can be effectively suppressed, and a highly efficient power generation device can be obtained. In particular, if the rotor shaft 11 is made of a ceramic material with a high Young's modulus, eccentricity will occur even when rotating at high speed.
Deformation can be kept to an extremely low level.

Furthermore, if the turbine impeller 3, the impeller shaft 3a, and the P-7 shaft 11 are integrally molded from a ceramic material, manufacturing and assembly work will be unnecessary and failures will be reduced.

(Effects of the Invention) As described above in detail, the present invention involves fitting a rare earth magnet rotor to the outer periphery of the rotor shaft of a power generation device connected to a turbine, and connecting both end surfaces of the magnet rotor to the L rotor shaft. In addition to holding it with the restraining member that was available, the outer circumferential surface of the magnet rotor is wrapped with carbon and wire, so even if the magnet rotor rotates at high speed, it will not deform due to centrifugal force. Without this, a sufficiently large generated power can be stably induced in the stator coil by using the strong magnetic force inherent in rare earth magnets. Therefore, in a synchronous generator with such a magnet rotor,
The exhaust gas energy of the internal combustion engine can be converted into electrical energy, and this electrical energy can be recovered as the axial force of the internal combustion engine or effectively used as other power sources.

[Brief explanation of the drawing]

The paulownia figure is a longitudinal sectional view showing one embodiment of the power generation device of the present invention. l... Turbine, lO... Generator, 11... Rotor shaft, 13... Holding member, 14... Magnet rotor,
15a... Stator coil, 33... Carbon wire. Patent applicant Representative of Isuze Automotive Co., Ltd. Patent attorney Minoru Tsuji (1 other person)

Claims (1)

[Claims] A power generation device connected to a turbine driven by exhaust gas energy of an internal combustion engine, in which a rare earth magnet rotor is fitted on the outer periphery of a rotor shaft, and both end surfaces of the magnet rotor are attached to the rotor shaft with a holding member. In addition to holding
A power generating device characterized by having carbon wire wrapped around the outer peripheral surface of the magnet rotor.