JP5320193B2 - Exhaust turbine turbocharger - Google Patents

Description

  The present invention relates to an exhaust turbine supercharger, and more particularly to an exhaust turbine supercharger mounted on a marine internal combustion engine, an onshore generator internal combustion engine, or the like.

  As such an exhaust turbine supercharger, one having a generator whose rotation shaft is connected to a turbine of a supercharger and a rotation shaft of a compressor is known (for example, see Patent Document 1).

JP 2007-056790 A

  In the exhaust turbine supercharger disclosed in Patent Document 1, the generator is cooled by a cooling medium (for example, water), and a passage (water jacket) for flowing the cooling medium is provided inside. The stator formed on the inner surface of the generator housing and the stator located radially inward of the liner were fixed to the inner peripheral surface of the generator housing by shrink fitting. Therefore, the liner and the stator are removed from the generator housing at the time of maintenance and inspection, so that only the liner and the stator cannot be replaced, resulting in an increase in maintenance and inspection costs.

  The present invention has been made in view of the above circumstances, and at the time of maintenance inspection, the liner and stator can be easily removed from the generator housing, and only the liner and stator can be replaced, thereby reducing maintenance inspection costs. It is an object of the present invention to provide an exhaust turbine supercharger that can be used.

The present invention employs the following means in order to solve the above problems.
An exhaust turbine supercharger according to the present invention includes a turbine unit driven by exhaust gas guided from an internal combustion engine, a compressor unit driven by the turbine unit to pump outside air to the internal combustion engine, the turbine unit, An exhaust turbine supercharger having a generator having a rotating shaft connected to a rotating shaft of the compressor unit, the passage constituting the generator and a passage for flowing a cooling medium for cooling the generator A generator housing that includes a hollow cylindrical liner formed inside and a stator that is included inside the liner and that is disposed radially inside the liner includes a rotation axis of the rotary shaft. A half-split structure which can be divided into two in a plane including the first, and is formed inside the generator housing to supply the cooling medium to the passage. A hole and a second hole for discharging the cooling medium from the passage and a joint between the passage and a surface facing the liner and a back surface facing the generator housing, and the first hole A ring-shaped member having a through hole communicating with the passage or a through hole communicating with the second hole and the passage at the center is provided.

  Further, the generator according to the present invention includes a hollow cylindrical liner in which a passage for flowing a cooling medium is formed, and a stator that is disposed radially inside the liner. The housing has a half-crack structure that can be divided into two planes including the rotation axis of the rotation shaft, and is formed inside the generator housing to supply the cooling medium to the passage. A hole and a second hole for discharging the cooling medium from the passage and a joint between the passage and a surface facing the liner and a back surface facing the generator housing, and the first hole A ring-shaped member having a through hole communicating with the passage or a through hole communicating with the second hole and the passage at the center is provided.

According to the exhaust turbine supercharger or the generator according to the present invention, the generator housing that houses the liner and the stator has a half-crack structure that can be divided into two on a plane that includes the rotation axis of the rotation shaft. At the time of maintenance inspection, the liner and the stator housed inside are exposed only by removing one of the generator housings from the other.
Further, the liner and the generator housing are only a ring-shaped member arranged at each joint between the first hole for supplying the cooling medium to the passage, the second hole for discharging the cooling medium from the passage, and the passage. It is connected (linked).
Thereby, at the time of maintenance and inspection, the liner and the stator can be easily removed from the generator housing, and only the liner and the stator can be replaced, and maintenance and inspection costs can be reduced.
Also, the liner and stator can be easily removed from the generator housing, and the liner and stator can be easily attached to the generator housing, reducing the time required for disassembly and assembly, and improving maintainability. Can do.

  In the exhaust turbine supercharger or the generator, at least one circumferential groove is formed along the circumferential direction on each surface of the front surface and the back surface, and an O-ring is disposed in each circumferential groove. More preferably.

According to such an exhaust turbine supercharger or generator, in the state where the ring-shaped member is arranged at each joint between the first hole and the passage and at each joint between the second hole and the passage, The O-ring housed in the groove is pressed by the outer peripheral surface of the liner and the surface of the ring-shaped member, or by the inner peripheral surface of the generator housing and the back surface of the ring-shaped member (slagged state). .
Accordingly, it is possible to reliably prevent leakage (outflow) of the cooling medium from the mating surface between the generator housing and the liner, that is, between the inner peripheral surface of the generator housing and the outer peripheral surface of the liner.

  The internal combustion engine according to the present invention can reduce maintenance and inspection costs, and includes an exhaust turbine supercharger that is excellent in maintainability.

  According to the internal combustion engine according to the present invention, the running cost can be reduced, and the time that must be stopped for maintenance and inspection can be reduced.

  According to the exhaust turbine supercharger according to the present invention, at the time of maintenance and inspection, the liner and the stator can be easily removed from the generator housing, and only the liner and the stator can be replaced, thereby reducing maintenance and inspection costs. There is an effect that can be.

It is a longitudinal section of an exhaust turbine supercharger concerning one embodiment of the present invention. FIG. 2 is a partially cut perspective view of the exhaust turbine supercharger shown in FIG. 1 viewed from the silencer side. FIG. 2 is a partially cutaway perspective view of the exhaust turbine supercharger shown in FIG. 1 as viewed from the turbine side. It is the figure which looked at the generator shown in FIG. 1 from the silencer side, Comprising: It is a front view of the cover member which comprises a generator. It is a VV arrow sectional view of Drawing 4. It is VI-VI arrow sectional drawing of FIG. (A) is the figure which expanded and showed the principal part of FIG. 5, (b) is bb arrow sectional drawing of (a).

Hereinafter, an embodiment of an exhaust turbine supercharger according to the present invention will be described with reference to FIGS. 1 to 7.
FIG. 1 is a longitudinal sectional view of an exhaust turbine supercharger according to the present embodiment, FIG. 2 is a partially cut perspective view of the exhaust turbine supercharger shown in FIG. 1 viewed from the silencer side, and FIG. FIG. 4 is a view of the generator shown in FIG. 1 viewed from the silencer side, and shows a cover member constituting the generator. FIG. 5 is a cross-sectional view taken along the line VV in FIG. 4, FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. 4, and FIG. 7A is an enlarged view of the main part in FIG. (B) is a bb arrow directional cross-sectional view of (a).

  As shown in FIGS. 1 to 3, the exhaust turbine supercharger 1 according to the present embodiment uses an exhaust gas (combustion gas) 2 led from an internal combustion engine (for example, a diesel engine or a gas turbine engine) not shown. A turbine unit 3 to be driven, a compressor unit 5 driven by the turbine unit 3 to pump outside air 4 to the internal combustion engine, and a casing provided between the turbine unit 3 and the compressor unit 5 to support them 6 is the main element.

A rotating shaft 7 having one end protruding toward the turbine section 3 and the other end protruding toward the compressor section 5 is inserted into the casing 6. The rotary shaft 7 is supported by a bearing 8 provided in the casing 6 so as to be rotatable about an axis. The casing 6 is provided with a lubricating oil supply passage 9 for supplying lubricating oil from a lubricating oil reservoir (not shown) to the bearing 8.
The lower end portion of the casing 6 supports the casing 6 at one point in the axial direction of the rotating shaft 7 (may be supported at two or more points in a direction orthogonal to the axial direction of the rotating shaft 7). The leg portion 6a is fixed to a base (not shown) installed on the floor surface. That is, the weight of the exhaust turbine supercharger 1 is transmitted to the base via the leg portion 6a.
In the figure, the symbol P is a punching plate. The punching plate P has one end fixed to the lower end of the turbine section 3 and the other end fixed to the base in the same manner as the leg 6 a of the casing 6. The punching plate P is not mainly intended to support the weight of the exhaust turbine supercharger 1 like the legs 6a, but the exhaust turbine supercharger 1 is shaken with respect to the base ( The main purpose is to prevent vibration.

The turbine section 3 is connected to an exhaust system of the internal combustion engine and receives an exhaust gas passage 10 to which at least a part of the exhaust gas 2 is supplied, and a flow of the exhaust gas 2 supplied into the exhaust gas passage 10. And a turbine 11 that is rotationally driven.
The turbine 11 includes a turbine rotor 12 and a turbine nozzle 13. The turbine rotor 12 includes a disc-shaped turbine disk 12a provided at one end of the rotary shaft 7, and a plurality of turbine blades having an airfoil cross section attached on the outer periphery of the turbine disk 12a. 12b.
Further, the turbine nozzle 13 is configured by annularly arranging a plurality of nozzle guide vanes 13a, and is disposed upstream of the turbine blade 12b.

  The exhaust gas passage 10 is connected to the exhaust system of the internal combustion engine, and is provided toward the nozzle guide vane 13a and the turbine blade 12b to guide the exhaust gas 2 to the radially outer side of the turbine 11. And a delivery path 10b that guides the exhaust gas 2 that has passed through the turbine 11 to the outside of the system or to an exhaust purification device (not shown).

The compressor unit 5 is driven to rotate, and a compressor impeller 14 that sends outside air 4 radially outward, and a spiral chamber that surrounds the compressor impeller 14 and compresses the outside air 4 sent by the compressor impeller 14. 15.
The compressor impeller 14 is attached to the other end of the rotary shaft 7 and has a substantially disc-shaped hub 14a. The compressor impeller 14 extends radially outward from the outer surface of the hub 14a, and is provided annularly along the circumferential direction. And a plurality of blades 14b.
A silencer (silencer) 16 connected to the intake system of the internal combustion engine is disposed adjacent to the upstream side of the compressor unit 5, and the outside air 4 that has passed through the silencer 16 passes through the inflow passage 17 to the compressor. It is guided to the blade 14 b of the impeller 14. Further, an intercooler, a surge tank, etc. (not shown) are provided on the downstream side of the compressor unit 5, and the outside air 4 that has passed through the spiral chamber 15 passes through the intercooler, the surge tank, etc., and then the internal combustion engine. To be supplied.

  A shell housing 18 having a recess 18a formed so as to taper toward the end surface of the hub 14a is provided in the center of the silencer 16, and in the recess 18a, A (high speed induction) generator 19 is accommodated. The shell housing 18 is fixed to the compressor unit 5 (the radially outer wall surface forming the inflow path 17) via a plurality of (for example, four) supports 20 provided in the inflow path 17. The outer surface of the shell housing 18 constitutes a radially inner wall surface that forms the inflow path 17.

  The generator 19 is disposed such that the rotating shaft 19a is positioned on the same rotating axis as the rotating shaft 7 described above, and the rotating shaft 19a passes through the hub 14a and faces the silencer 16 side. The protruding end of the rotating shaft 7 is connected to the distal end of the rotating shaft 7 via a flexible coupling 21. That is, the rotating shaft 19 a of the generator 19 rotates with the rotating shaft 7.

  As shown in FIGS. 5 and 6, the generator 19 includes a stator (stator) 31 and a rotor (rotor) 32 as main elements. The stator 31 includes an iron core 33 and a coil 34, and the rotor 32 is integrally coupled to the rotary shaft 19a. The stator 31 and the rotor 32 are accommodated in a generator housing 35 having a hollow cylindrical shape. The (first) opening formed on one end side (the right side in FIGS. 5 and 6) of the generator housing 35 is closed by the (first) cover member 36, and the other end side of the generator housing 35 ( The (second) opening formed on the left side in FIGS. 5 and 6 is closed by a (second) cover member 37. A through hole 38 through which one end of the rotating shaft 19a (the right end in FIGS. 5 and 6) passes is formed at the center of the cover member 36, and one end of the rotating shaft 19a is connected to the slide bearing 39. The bearing is supported by the cover member 36 through the bearing. On the other hand, a recess 40 for receiving (accommodating) the other end (the left end in FIGS. 5 and 6) of the rotating shaft 19a is formed at the center of the cover member 37. The end portion is supported by the cover member 37 through a plain bearing 41. Further, the generator housing 35 has a half-cracked structure that can be divided into two on a plane including the rotation axis of the rotation shaft 19a, and is coupled via a plurality of bolts (not shown).

Further, a hollow cylindrical liner 42 formed so as to be in contact with both the outer peripheral surface 33a of the iron core 33 and the inner peripheral surface 35a of the generator housing 35 is provided between the iron core 33 and the generator housing 35. In the liner 42, a passage (water jacket) 43 for flowing a cooling medium (water or similar coolant) is formed.
As shown in FIG. 5, the generator housing 35 and the cover member 37 are formed with a (first) hole 44 having a circular shape in a sectional view up to a predetermined position along the axial direction (left-right direction in FIG. 5). The generator housing 35 has a (first) hole 45 communicating with the hole 44 and the inlet 43a of the passage 43 (see FIGS. 7A and 7B) in the radial direction (in FIG. 5). (Vertical direction). A cooling medium supply pipe 46 for supplying a cooling medium into the hole 44 is connected to the inlet of the hole 44.
On the other hand, as shown in FIG. 6, the generator housing 35 and the cover member 37 have a (second) hole 47 having a circular shape in a sectional view, up to a predetermined position along the axial direction (the horizontal direction in FIG. 6). The generator housing 35 is formed with a (second) hole 48 communicating with the hole 47 and the outlet 43 of the passage 43 (see FIG. 7A and FIG. 7B) in the radial direction (see FIG. 6 in the vertical direction). A cooling medium discharge pipe 30 for discharging the cooling medium from the hole 47 is connected to the outlet of the hole 47.

As shown in FIGS. 7A and 7B, ring-shaped members 49 are provided at the joints (connection portions) between the passages 43 and the holes 45, respectively. The ring-shaped member 49 is a plate-like member that has a predetermined plate thickness and has a circular shape in plan view, and has a central portion with a plate thickness direction (up and down in FIGS. 7A and 7B). A through hole 50 penetrating in the direction) is formed. Two circumferential grooves 51 are formed along the circumferential direction on the front surface (surface facing the liner 42) 49a and the back surface (surface facing the generator housing 35) 49b of the ring-shaped member 49, respectively. Each of the circumferential grooves 51 accommodates an O-ring 52. In addition, the outer peripheral surface 42a of the liner 42 around (in the vicinity of) the inlet 43a of the passage 43 accommodates the surface 49a and the outer peripheral surface 49c of the ring-shaped member 49 positioned on the liner 42 side, and has a circular shape in plan view. A (first) recess 53 is formed, and a ring-shaped member 49 located on the generator housing 35 side is formed on the inner peripheral surface 35a of the generator housing 35 around (near) the outlet 45a of the hole 45. In addition, the back surface 49b and the outer peripheral surface 49d are accommodated, and a (second) recess 54 having a circular shape in plan view is formed. Then, the recess 53 and the recess 54 are aligned (the recess 53 formed in the liner 42 is provided at a position opposite to the recess 54 formed in the generator housing 35). A space for accommodating the ring-shaped member 49 is formed by 53 and the recess 54. This space is set so that its inner diameter is the same as the outer diameter of the ring-shaped member 49 or slightly larger than the outer diameter of the ring-shaped member 49, and its height is the same as the height of the ring-shaped member 49. Alternatively, the height is set to be slightly higher than the height of the ring-shaped member 49. Then, in a state in which the ring-shaped member 49 is accommodated in this space, the O-ring 52 accommodated in the circumferential groove 51 is pressed by the front surface 49a or the back surface 49b of the ring-shaped member 49 (sludged state). Thus, the leakage (outflow) of the cooling medium from the mating surface of the generator housing 35 and the liner 42, that is, between the inner peripheral surface 35a of the generator housing 35 and the outer peripheral surface 42a of the liner 42 is prevented. The Rukoto.
A ring-shaped member 49 and recesses 53 and 54 are also provided at the joint (connection portion) between the passage 43 and the hole 48, respectively.

According to the exhaust turbine supercharger 1 according to the present embodiment, the generator housing 35 that houses the liner 42 and the stator 31 can be divided into two parts on a plane including the rotation axis of the rotation shaft 19a. At the time of maintenance and inspection, the liner 42 and the stator 31 housed inside are exposed only by removing one of the generator housings 35 from the other.
The liner 42 and the generator housing 35 are arranged at the joints between the passages 43 and the holes 44 and 45 for supplying the cooling medium to the passage 43 and the holes 47 and 48 for discharging the cooling medium from the passage 43. It is connected (linked) only by the ring-shaped member 49.
Thereby, at the time of maintenance inspection, the liner 42 and the stator 31 can be easily removed from the generator housing 35, and only the liner 42 and the stator 31 can be replaced, and the maintenance inspection cost can be reduced.
Further, it becomes easy to remove the liner 42 and the stator 31 from the generator housing 35 and to attach the liner 42 and the stator 31 to the generator housing 35, and the time required for disassembly and assembly can be shortened. Maintainability can be improved.

Further, the O-ring 52 accommodated in the circumferential groove 51 in a state where the ring-shaped member 49 is disposed at each joint between the holes 44 and 45 and the passage 43 and each joint between the holes 47 and 48 and the passage 43. The outer peripheral surface 42a of the liner 42 (more specifically, the bottom surface of the recess 53) and the surface 49a of the ring-shaped member 49 (more specifically, the bottom surface of the circumferential groove 51) or the inner peripheral surface of the generator housing 35. It is in a state of being pressed (in a crushed state) by 35a (more specifically, the bottom surface of the recess 54) and the back surface 49b of the ring-shaped member 49 (more specifically, the bottom surface of the circumferential groove 51).
This reliably prevents leakage (outflow) of the cooling medium from the mating surface of the generator housing 35 and the liner 42, that is, between the inner peripheral surface 35 a of the generator housing 35 and the outer peripheral surface 42 a of the liner 42. be able to.

Furthermore, the outer peripheral surface 42a of the liner 42 around the inlet 43a of the passage 43 accommodates the surface 49a and the outer peripheral surface 49c of the ring-shaped member 49 located on the liner 42 side, and has a concave shape having a circular shape in plan view. 53 is formed, and the inner peripheral surface 35a of the generator housing 35 around the outlet 45a of the hole 45 accommodates the back surface 49b and the outer peripheral surface 49d of the ring-shaped member 49 located on the generator housing 35 side. In addition, a recess 54 having a circular shape in plan view is formed.
Thereby, it is possible to prevent the liner 42 and the stator 31 attached (fixed) to the liner 42 from rotating in the circumferential direction.

  According to the internal combustion engine (not shown) according to the present invention, the maintenance cost can be reduced, and the exhaust turbine supercharger 1 having excellent maintainability is provided, so that the running cost is reduced. This can reduce the time that must be taken for maintenance.

The present invention is not limited to the above-described embodiments, and various changes and modifications can be made without departing from the gist of the present invention.
For example, in the above-described embodiment, the ring-shaped member 49 having a ring shape in plan view is disposed at each joint between the passage 43 and the hole 45 and each joint between the passage 43 and the hole 48. However, the planar view shape of the member arranged at each joint between the passage 43 and the hole 45 and each joint between the passage 43 and the hole 48 is a shape other than the ring shape (an elliptical shape, a rectangular shape, a square shape, a triangular shape). Any shape such as a shape) may be used.

DESCRIPTION OF SYMBOLS 1 Exhaust turbine supercharger 2 Exhaust gas 3 Turbine part 4 Outside air 5 Compressor part 7 Rotating shaft 19 Generator 19a Rotating shaft 31 Stator 35 Generator housing 42 Liner 43 Passage 44 Hole (first hole)
45 holes (first hole)
47 holes (second hole)
48 holes (second hole)
49 Ring-shaped member 49a Front surface 49b Back surface 50 Through hole 51 Circumferential groove 52 O-ring

Claims (5)

A turbine unit driven by exhaust gas guided from the internal combustion engine, a compressor unit driven by the turbine unit to pump outside air to the internal combustion engine, and a rotation coupled to the turbine unit and a rotation shaft of the compressor unit An exhaust turbine supercharger having a generator with a shaft,
A hollow cylindrical liner constituting the generator and having a passage for flowing a cooling medium for cooling the generator formed therein, and the generator and the inner side in the radial direction of the liner The generator housing that accommodates the stator formed inside is a half-cracked structure that can be divided into two on a plane including the rotation axis of the rotation shaft,
A first hole that is formed inside the generator housing and supplies the cooling medium to the passage, a second hole that discharges the cooling medium from the passage, and each joint of the passage, A center portion having a front surface facing the liner and a rear surface facing the generator housing, and a through hole communicating the first hole and the passage or a through hole communicating the second hole and the passage. An exhaust turbine supercharger characterized in that a ring-shaped member is provided.   The at least 1 circumferential groove is formed in each surface of the said surface and the said back surface along the circumferential direction, and O-ring is arrange | positioned in each circumferential groove. Exhaust turbine supercharger.   An internal combustion engine comprising the exhaust turbine supercharger according to claim 1. A generator housing that houses therein a hollow cylindrical liner in which a passage for flowing a cooling medium is formed and a stator disposed radially inward of the liner includes a rotation axis of a rotation shaft It is a half-cracked structure that can be divided into two on a plane,
A first hole that is formed inside the generator housing and supplies the cooling medium to the passage, a second hole that discharges the cooling medium from the passage, and each joint of the passage, A center portion having a front surface facing the liner and a rear surface facing the generator housing, and a through hole communicating the first hole and the passage or a through hole communicating the second hole and the passage. A generator having a ring-shaped member included in the generator.   The at least 1 circumferential groove is formed in each surface of the said surface and the said back surface along the circumferential direction, and O-ring is arrange | positioned in each circumferential groove. Generator.

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