JP5182197B2 - Turbine generator - Google Patents

Description

  The present invention relates to a turbine generator.

  In recent years, it has been proposed that a turbine generator that generates power using exhaust heat of an internal combustion engine is mounted on a vehicle or the like to effectively use energy.

  As an example of this type of apparatus, as shown in FIG. 2, in an internal combustion engine in which the coolant which has been cooled by the engine 60 is cooled by the radiator 61 and circulated by the pump 62, the upstream side of the radiator 61 is used. A heat exchanger 31 is provided, and a liquid cooling medium is supplied to the heat exchanger 31 by a pump 32 to exchange heat with the high-temperature coolant, and the working fluid generated by vaporizing the cooling medium is Power is generated by the generator M by supplying the turbine 4 of the turbine generator 100, and the low-pressure working fluid after the turbine 4 is rotationally driven is cooled and condensed by the condenser 33, and then liquefied. Some are supplied to the heat exchanger 31.

  For example, Patent Document 1 shows a general technical level of an apparatus using exhaust heat as shown in FIG.

  On the other hand, FIG. 3 is a side sectional view showing an example of an early turbine generator 100 developed by the present inventors. In FIG. 3, reference numeral 1 denotes a rotor having shafts 2 and 3 on both sides. A turbine 4 is integrally fitted to one shaft 2 of 1. Reference numeral 5 denotes a turbine housing formed to receive the turbine 4. The turbine housing 5 has a scroll passage 6 for guiding a working fluid having pressure to the turbine 4, and It has a discharge passage 6a for exhausting the working fluid that has become low pressure after being rotationally driven.

  Reference numeral 7 denotes a stator housing that is integrally assembled with the turbine housing 5 by fixing bolts 8. The stator housing 7 projects toward the inner peripheral side so as to approach the one shaft 2, and the inner peripheral portion approaches the rotor 1. And the turbine housing 5 of the motor stator 10 formed so as to surround the rotor 1 in the motor stator housing portion 10 a formed by the cylindrical projection 9. One end portion on the side (left end portion in the example of FIG. 3) is accommodated and held. Further, a first bearing 11 is disposed between the inner peripheral portion of the cylindrical protruding portion 9 and the one shaft 2 so as to rotatably support the one shaft 2. The motor stator 10 includes a stator 12 formed of an inner coil and an outer stator sleeve 13 having an axial length longer than that of the stator 12.

  A plurality of vanes 15 are arranged on the end surface of the stator housing 7 integrally assembled with the turbine housing 5 in the circumferential direction with respect to the nozzle portion 14 that guides the working fluid in the scroll passage 6 to the turbine 4 from the circumferential direction. And a plate 16 for fixing each vane 15 is disposed in the fitting recess, and the plate 16 is sandwiched between the turbine housing 5 and the stator housing 7 by assembling. Yes.

  Reference numeral 17 denotes a bearing flange that is integrally assembled to the stator housing 7 by a fixing bolt 18. A cylindrical projection 19 that protrudes in the axial direction inside the portion of the motor stator 10 so as to hold the other end of the motor stator 10, and further includes an inner peripheral portion of the cylindrical projection 19 and the rotor. A second bearing 20 is disposed between the other shaft 3 and the other shaft 3 so as to rotatably support the other shaft 3. Reference numeral 21 denotes an opening formed so that the other shaft 3 of the bearing flange 17 penetrates to a corresponding position.

  Reference numeral 22 denotes a lid member that is integrally assembled to the bearing flange 17 by a fixing bolt 23. The lid member 22 projects so as to close the opening 21 provided in the bearing flange 17, and is fitted into the opening 21. It has a convex part 24. In FIG. 3, reference numeral 25 denotes seal rings provided between the turbine housing 5 and the stator housing 7, between the outer periphery of the motor stator 10 and the stator housing 7, and between the bearing flange 17 and the lid member 22. The seal material 25 provided between the outer periphery of the motor stator 10 and the stator housing 7 is a supply / exhaust port (with respect to the cooling water passage 7a for the motor stator 10 formed in the stator housing 7). Sealing of cooling water circulated through (not shown) is performed.

  The rotor 1 and the motor stator 10 form a generator M, and the turbine 4 is provided on the same axis of the generator M to form a turbine generator 100. The turbine generator configured in this way According to 100, it is easy to assemble and a compact shape can be obtained.

JP 2008-8224 A

  However, in the turbine generator 100 as shown in FIG. 3, the pressure on the turbine 4 side of the first bearing 11 becomes higher than the pressure on the rotor 1 side during operation, and the first bearing 11 is associated with this pressure difference. There is a possibility that the grease enclosed in the inside leaks and scatters, and the first bearing 11 does not function smoothly.

  In view of such circumstances, the present invention is intended to provide a turbine generator that can reliably prevent the grease enclosed in the bearing from leaking and scattering, and that can smoothly operate.

The present invention includes a rotor having shafts on both sides and a turbine provided on one shaft, a turbine housing that surrounds and accommodates the turbine, a motor stator that surrounds the rotor, and the one shaft. A stator housing fixed to the turbine housing with a first bearing therebetween, and a bearing flange fixed to the stator housing with a second bearing between the other shaft of the rotor A turbine generator,
The stator generator is provided with a vent hole for eliminating a pressure difference between the turbine side and the rotor side of the first bearing.

  According to the above means, the following operation can be obtained.

  During the operation of the turbine generator, the turbine side and the rotor side of the first bearing are communicated with each other through the vent hole formed in the stator housing, and the pressure on the turbine side of the first bearing is not higher than the pressure on the rotor side. Since the difference does not occur, the grease sealed in the first bearing is prevented from leaking and scattering, and the first bearing functions smoothly.

  In the turbine generator, the bearing flange can be provided with a vent hole that eliminates the pressure difference between the rotor side and the non-rotor side of the second bearing, and the vent hole is provided in the bearing flange. If not, the pressure on the rotor side of the second bearing becomes higher than the pressure on the non-rotor side during operation due to the vent hole being drilled in the stator housing. There is a risk that the grease sealed inside will leak and scatter and the second bearing will not function smoothly. As described above, the bearing flange is connected to the rotor side and the anti-rotor side of the second bearing. When the air hole that eliminates the pressure difference is made, the rotor side and the non-rotor side of the second bearing communicate with each other through the air hole made in the bearing flange, and the pressure on the rotor side of the second bearing is In Not higher than kicking the pressure, the pressure difference does not occur, grease contained within a second bearing that is unavoidable resulting in scattered leaking, said second bearing to function smoothly.

  According to the turbine generator of the present invention, it is possible to reliably prevent the grease enclosed in the bearing from leaking and scattering, and to achieve an excellent effect that the operation can be performed smoothly.

It is a sectional side view which shows the Example of this invention. It is a whole schematic block diagram which shows an example at the time of mounting a turbine generator in an internal combustion engine. It is a sectional side view showing an example of the early turbine generator which the present inventors developed.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 shows an embodiment of the present invention. In the figure, the same reference numerals as those in FIGS. 2 and 3 denote the same components, and the basic configuration is as shown in FIGS. Although the same, the feature of the present embodiment is that, as shown in FIG. 1, the stator housing 7 includes a turbine 4 side and a rotor 1 side of the first bearing 11 (in the example of FIG. 1, a motor stator accommodating portion 10a). This is in that a vent hole 40 is formed to eliminate the pressure difference in the internal space leading to.

  Further, in the case of the present embodiment, the bearing flange 17 includes the rotor 1 side of the second bearing 20 (in the example of FIG. 1, the internal space side leading to the motor stator housing portion 10a) and the counter-rotor 1 side (example of FIG. 1). Then, a vent hole 50 is formed to eliminate a pressure difference in the opening 21 that is closed by the lid member 22.

  Next, the operation of the above embodiment will be described.

  During operation of the turbine generator 100, the turbine 4 side of the first bearing 11 and the rotor 1 side are communicated with each other through the vent hole 40 formed in the stator housing 7, and the pressure on the turbine 4 side of the first bearing 11 is set to the rotor 1. Since the pressure does not become higher than the pressure on the side and no pressure difference occurs, it is avoided that the grease sealed in the first bearing 11 leaks and scatters, and the first bearing 11 functions smoothly. .

  Here, if the vent hole 50 is not drilled in the bearing flange 17, the pressure on the rotor 1 side of the second bearing 20 during operation is accompanied by the drilling of the vent hole 50 in the stator housing 7. Becomes higher than the pressure on the side opposite to the rotor 1, and the grease enclosed in the second bearing 20 leaks and scatters with this pressure difference, and the second bearing 20 may not function smoothly. However, in the present embodiment, the bearing flange 17 is provided with a vent hole 50 for eliminating a pressure difference between the rotor 1 side and the counter-rotor 1 side of the second bearing 20. The rotor 1 side and the non-rotor 1 side of the second bearing 20 are communicated with each other through the vent hole 50 formed in the second bearing 20, and the pressure on the rotor 1 side of the second bearing 20 does not become higher than the pressure on the anti-rotor 1 side. No difference Therefore, grease contained in the second bearing 20 that is unavoidable resulting in scattered leaking, said second bearing 20 functions smoothly.

  Thus, the grease sealed in the first bearing 11 and the second bearing 20 can be reliably prevented from leaking and scattering, and the operation can be performed smoothly.

  The turbine generator of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Rotor 2 One axis | shaft 3 The other axis | shaft 4 Turbine 5 Turbine housing 7 Stator housing 10 Motor stator 10a Motor stator accommodating part 11 First bearing 12 Stator 13 Stator sleeve 17 Bearing flange 20 Second bearing 22 Lid member 31 Heat exchange Unit 32 Pump 33 Condenser 40 Vent hole 50 Vent hole 60 Engine 61 Radiator 62 Pump 100 Turbine generator M Generator

Claims (2)

A rotor having shafts on both sides and a turbine provided on one shaft, a turbine housing that surrounds and accommodates the turbine, and a motor stator that surrounds the rotor, and is disposed between the one shaft. A turbine generator comprising a stator housing having one bearing and fixed to the turbine housing, and a bearing flange having a second bearing between the other shaft of the rotor and fixed to the stator housing. There,
A turbine generator having a vent hole formed in the stator housing for eliminating a pressure difference between a turbine side and a rotor side of the first bearing.   The turbine generator according to claim 1, wherein a vent hole is formed in the bearing flange to eliminate a pressure difference between the rotor side and the non-rotor side of the second bearing.

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