CN106715864A

CN106715864A - Supercharger

Info

Publication number: CN106715864A
Application number: CN201580040132.XA
Authority: CN
Inventors: 平野雄郎; 平野雄一郎
Original assignee: Mitsubishi Heavy Industries Ltd
Current assignee: Mitsubishi Heavy Industries Ltd
Priority date: 2014-10-03
Filing date: 2015-07-13
Publication date: 2017-05-24
Anticipated expiration: 2035-07-13
Also published as: CN106715864B; KR101873674B1; JP5964378B2; JP2016075183A; WO2016051916A1; KR20170002636A

Abstract

This supercharger is provided with: a centrifugal compressor having an impeller linked to a rotating shaft; a bearing housing for accommodating a bearing for rotatably supporting the rotating shaft, the bearing housing facing the rear surface of the impeller; a head tank provided to the bearing housing and configured so as to store lubricating oil supplied to the bearing; a labyrinth seal provided between the rear surface of the impeller and the bearing housing, the labyrinth seal including an annular labyrinth seal plate and a labyrinth fin integrated with the labyrinth seal plate; and a heat-transfer-promoting means configured so as to promote heat transfer between the lubricating oil stored in the head tank and the labyrinth seal plate.

Description

Supercharger

Technical field

The present invention relates to the supercharger that the temperature that can suppress the impeller in rotation rises.

Background technology

Exhaust turbo-supercharging machine is to utilize the power of the exhaust driven gas turbine driven from the waste gas of internal combustion engine discharge and make centrifugation Compressor rotation, the device that compressed air is sent into internal combustion engine.High temperature is turned into by the air after the wheel compresses of centrifugal compressor, A part is roundabout in the rear side of impeller.In order to prevent the situation, in the past the back side of impeller and bear box stationary wall it Between be provided with the seal members such as labyrinth.

In the narrow stream of labyrinth, leakage stream is because of the stationary wall of bear box and the back of the body of the impeller of rotation Face and be subject to stronger shearing force so as to be heated, further as high temperature.Thus, labyrinth turns into high temperature, labyrinth The heat of formula seal is transmitted to impeller, and the back temperature of impeller rises.

As the material of impeller, from the point of view of inexpensive and good machinability, usually using aluminium alloy.But, in centrifugation In the present situation of the high-pressure ratioization development of compressor, the back temperature of impeller rises, due to applying what is produced by rotation to impeller Centrifugal force, thus it is possible to promote the deformation of creep of impeller.

Therefore, the various motions for cooling wheel in operation were proposed in the past.For example, disclosed in patent document 1 To the top of the compressor impeller side shield plate at the back side for being configured at impeller blow the component of cooling lubricating oil and to shape Into the structure that cooling lubricating oil is supplied in the cooling space of compressor impeller side shield back.

In addition, Patent Document 2 discloses a kind of structure, it is at the position of the bear box relative with the back side of impeller Circumferentially it is provided with the cooling water channel for making cooling water circulate.

Additionally, Patent Document 3 discloses the annulus that supply cooling air is formed with labyrinth Structure.

Patent document 1：Japanese Unexamined Patent Publication 2008-248706 publications

Patent document 2：Japanese Unexamined Patent Publication 2009-243299 publications

Patent document 3：Japanese Unexamined Patent Publication 2012-082689 publications

Component is being blowed disclosed in patent document 1, the cooling lubricating oil for only being supplied to exhaust turbo-supercharging machine A part is blowed to the top of compressor impeller side shield plate, is wanting to make the top of compressor impeller side shield plate fully cold But, it is necessary to supply substantial amounts of cooling lubricating oil to exhaust turbo-supercharging machine in the case of.

In addition, being formed in the component disclosed in patent document 2 and 3, it is necessary in bear box or labyrinth Cooling space, and need to form the path for cooling space supply cooling water, cooling air.Accordingly, there exist bearing Housing, the shape of labyrinth become problem complicated, that the manufacture of exhaust turbo-supercharging machine becomes high cost.

The content of the invention

At least one implementation method of the invention be in view of the problem of the conventional art and complete, it is intended that logical Cross using interim storage in the lubricating oil of head case, so as to prevent the temperature of impeller from rising with simple and inexpensive component.

(1) supercharger of at least one implementation method of the invention has：

Centrifugal compressor, the centrifugal compressor has the impeller linked with rotary shaft；

Bear box, the bear box storage bearing that rotatably supports the rotary shaft, and with the leaf The back side of wheel is relative；

Head case, the head case is arranged at the bear box and is configured to the lubricating oil that storage is supplied to the bearing；

Labyrinth, the labyrinth is arranged between the back side of the impeller and the bear box, bag Labyrinth plate containing ring-type and the labyrinth type fin with the labyrinth plate one；And

Heat transfer promotion unit, the lubricating oil that the heat transfer promotion unit is configured to promote the head case to be stored with it is described Heat transfer between labyrinth plate.

According to said structure (1), by heat transfer promotion unit such that it is able to promote labyrinth plate with institute in head case Heat transfer between the lubricating oil of storage.Substantial amounts of lubricating oil is provisionally stored in head case, substantial amounts of lubricating oil can be used To cool down labyrinth.Temperature therefore, it is possible to suppress labyrinth with simple and inexpensive component rises. Temperature thereby, it is possible to prevent impeller rises, and suppresses creep extension.

" head case " mentioned here is different from recess (recess), space, path, with the axle that can be stored to supercharger The position supply such as hold and the capacity of the lubricating oil of sufficient amount required for being cooled down to these cooled positions.

Further, since heat transfer cools down labyrinth type between lubricating oil and labyrinth plate by being stored in head case Sealing plate, therefore the path of cooling water, cooling air need not be set.Therefore, it is possible to be prevented with simple and inexpensive component The temperature of labyrinth and impeller rises, and suppresses creep extension.

As long as additionally, the supercharger with head case, it becomes possible in the case where significantly design alteration is not carried out, easily And heat transfer promotion unit is set at low cost.

(2) in several embodiments, in said structure (1),

The labyrinth plate is contacted with the head case, also,

The jog that the heat transfer promotion unit is formed from the inner surface of the head case is constituted.

According to said structure (2), jog can be formed by the inner surface in head case, so as to expand labyrinth plate The surface area of the head case for being contacted, promotes the heat transfer between the wall and lubricating oil.Therefore, it is possible to simple and inexpensive structure Part suppresses labyrinth and the temperature of impeller rises, and can suppress the creep extension of impeller.

(3) in several embodiments, in said structure (2),

The jog is made up of the multiple wire projections for configuring side by side,

The multiple wire projection extends respectively along horizontal direction.

According to said structure (3), jog is formed by horizontally extending wire projection, the lubricating oil and line for flowing down Shape projection is contacted and forms turbulent flow.Thus, lubricating oil is stirred, therefore, it is possible to promote the wall of head case by mixing effect Heat transfer between lubricating oil.Therefore, it is possible to suppress the temperature of labyrinth and impeller with simple and inexpensive component Degree rises, and can suppress the creep extension of impeller.

(4) in several embodiments, in said structure (2),

The multiple wire projection extends respectively along above-below direction.

According to said structure (4), because jog is formed by vertically extending wire projection, therefore lubricating oil energy It is enough successfully to be flowed down along wire projection, therefore successfully it is lubricated supply of the oil to bearing etc..

(5) in several embodiments, in said structure (1),

The heat transfer promotion unit is made up of radiating part, and the radiating part is integrally formed with the labyrinth plate, It is prominent to the inside of the head case and contacted with lubricating oil.

According to said structure (5), heat conductivity can be improved between labyrinth plate and radiating part, therefore, it is possible to promote The heat transfer entered between labyrinth plate and lubricating oil.It is close thereby, it is possible to suppress labyrinth type with simple and inexpensive component The temperature of sealing and impeller rises, and can suppress the creep extension of impeller.

(6) in several embodiments, in any one in said structure (1)~(4),

The supercharger also has the grease feed pipe for supplying lubricating oil to the head case,

The heat transfer promotion unit is made up of oil port, and the oil port is formed in the head case The part of the grease feed pipe that inside extends, towards the wall opening of the head case.

According to said structure (6), from grease feed pipe to head case in the lubricating oil that supplies connect with labyrinth plate The wall collision of tactile head case.By the temperature side of the lubricating oil that the surface of the wall of the collision stream destruction head case of the lubricating oil is formed Interlayer, therefore promote the heat transfer between the wall and lubricating oil of head case.Therefore, it is possible to suppress fan with simple and inexpensive component The temperature of palace formula seal and impeller rises, and can suppress the creep extension of impeller.

(7) supercharger of at least one implementation method of the invention has：

Expansion section, the expansion section is formed between the bear box and the labyrinth plate, and shape internally Into there is the arc-shaped space that extends along the labyrinth plate arc-shaped, connected with the inside of head case at least partially.

According to said structure (7), the profit provisionally stored in the arc-shaped space for being formed at the expansion section can be expanded Area of heat transfer between lubricating oil and labyrinth plate, therefore, it is possible to promote the heat between lubricating oil and labyrinth plate to pass Pass.Temperature therefore, it is possible to suppress labyrinth and impeller with simple and inexpensive component rises, and can suppress impeller Creep extension.

(8) in several embodiments, in said structure (7),

The expansion section is internally formed with the arc-shaped space of C fonts extension, wherein, the expansion section is formed in described Between bear box and the labyrinth plate, and internally it is formed with and prolongs in arc-shaped along the labyrinth plate The arc-shaped space stretched, at least a portion of the expansion section is connected with the inside of head case.

According to said structure (8), be extended by making expansion section C fonts such that it is able to further promote lubricating oil with Heat transfer between labyrinth plate.

(9) in several embodiments, in said structure (7) or (8),

The grease feed pipe is connected with the expansion section.

According to said structure (9), due to the lubricating oil compared externally to expansion section supplying temperature, therefore, it is possible to further Improve cooling effect of the lubricating oil to labyrinth plate.

(10) in several embodiments, in any one in said structure (7)~(9),

The supercharger has communication path, the communication path be formed at the bear box and the expansion section with it is described The communication path extended between bearing.

According to said structure (10), by setting the communication path such that it is able to the lubrication that will be flowed in expansion section The flow velocity of oil is remained at more than certain value.Therefore, it is possible to promote the lubricating oil and the labyrinth type that are flowed in arc-shaped space Heat transfer between sealing plate, it is possible to increase the cooling effect of labyrinth plate.

(11) in several embodiments, in said structure (7) or (8),

The expansion section has the opening relative with the back side of the impeller,

The labyrinth plate is by the closure of openings of the expansion section.

According to said structure (11), because expansion section has the opening relative with the back side of impeller, so as to in the absence of this The situation of opening is compared, and can make the handling ease and cost degradation of expansion section.

Also, the wall in arc-shaped space is formed due to labyrinth plate, therefore labyrinth plate is straight with lubricating oil Contact, can further promote the heat transfer between labyrinth plate and lubricating oil.

At least one implementation method of the invention, can suppress labyrinth with simple and inexpensive component Temperature rise.Temperature therefore, it is possible to suppress impeller rises, and can suppress the creep extension of impeller.

Brief description of the drawings

Fig. 1 is a stereogram for the exhaust turbo-supercharging machine of implementation method.

Fig. 2 is to represent a longitudinal section for the heat transfer promotion unit of implementation method.

Fig. 3 is to represent a longitudinal section for the heat transfer promotion unit of implementation method.

Fig. 4 is to represent a longitudinal section for the heat transfer promotion unit of implementation method.

Fig. 5 is to represent a longitudinal section for the heat transfer promotion unit of implementation method.

Fig. 6 is to represent a longitudinal section for the heat transfer promotion unit of implementation method.

Fig. 7 is the sectional view along the line A-A in Fig. 6.

Fig. 8 is to represent a longitudinal section for the heat transfer promotion unit of implementation method.

Fig. 9 is the sectional view along the line B-B in Fig. 8.

Figure 10 is to represent an enlarged partial sectional view for the heat transfer promotion unit of implementation method.

Specific embodiment

Hereinafter, several embodiments of the invention is illustrated referring to the drawings.But, on being remembered as implementation method Size, material, shape, its relative configuration of structure member shown in carry or accompanying drawing etc., it is not intended to by the present invention Scope be limited to this, only illustrate example.

For example, making " in some directions ", " along certain direction ", " parallel ", " orthogonal ", " " center ", " concentric " or " same Axle " etc. represents that the expression of relative or absolute configuration not only strictly represents such configuration, be also represented by existing tolerance or Person can obtain the degree of identical function angle or distance and the state of relatively displacement.

For example, making " identical ", " equal " and " homogeneous " etc. to represent that expression of the things in equal state not only represents tight The equal state of lattice, is also represented by the state of the difference of the degree that there is tolerance or can obtain identical function.

For example, making four sides that the expression of the shapes such as expression quadrangle, cylindrical shape is not only represented in the geometrically strict meaning The shapes such as shape, cylindrical shape, in the scope that can obtain identical effect, are also represented by comprising jog or chamfered section etc. Shape.

On the other hand, " be provided with ", " including ", " possessing ", the such expression of "comprising" or " having " structural element It is not the exclusive expression for excluding the presence of other structural elements.

An implementation method for applying the present invention to exhaust turbo-supercharging machine peculiar to vessel is illustrated according to Fig. 1 and Fig. 2. Fig. 1 is the overall perspective view of the exhaust turbo-supercharging machine 10 of present embodiment.

As shown in figure 1, exhaust turbo-supercharging machine 10 is made up of centrifugal compressor 11, bearing portion 12 and exhaust driven gas turbine 13.

Centrifugal compressor 11 has compression case 14 and is accommodated in compression case 14 to be fixed on the state of armature spindle 16 Interior impeller 18, impeller 18 has the multiple blade 18a being disposed radially around.

Exhaust driven gas turbine 13 has turbine case 20 and to be fixed on the whirlpool that the state of armature spindle 16 is accommodated in turbine case 20 Wheel disc 22, multiple turbo blades 23 are radially integrally formed at the turbine disk 22.

Bearing portion 12 has：Bear box 24；Journal bearing 26, in the inside of bear box 24 in the side of centrifugal compressor 11 With this 2 positions of the side of exhaust driven gas turbine 13 rotatably support of rotor shaft 16；And thrust bearing 28, in the side of centrifugal compressor 11 1 position support of rotor shaft 16.

Compression case 14 has：In the entrance opening 14a of the axis upper shed of armature spindle 16；And have in outer peripheral face The outlet shell 14b of the exit opening of tangential direction upper shed.

Turbine case 20 has：Entrance shell 20a with the entrance opening being open in tangential direction；And in armature spindle 16 Axis upper shed exit opening 20b.

The waste gas e flowed into from the entrance opening of entrance shell 20a rotates the turbine disk 22 and armature spindle 16, from exit opening 20b flows out.

Impeller 18 is rotated by the rotation of armature spindle 16, is attracted from entrance opening 14a by the rotation of impeller 18 Air a is simultaneously compressed, so as to be discharged from the exit opening of outlet shell 14b.

Be configured to interim storage lubricating oil head case 30 be integrally provided to armature spindle 16 top bear box 24 The part of upside.Grease feed pipe 32 is connected with the upper wall of head case 30.For example, being set in the outside of exhaust turbo-supercharging machine 10 There is storage (not scheme to the lubricating oil store groove of body of the internal-combustion engine (not shown) and the lubricating oil of the supply of exhaust turbo-supercharging machine 10 Show), from the lubricating oil store groove via oil supply system to the body of the internal-combustion engine and the supply lubricating oil of exhaust turbo-supercharging machine 10. The lubricating oil supplied to exhaust turbo-supercharging machine 10 is supplied to head case 30 via grease feed pipe 32, and interim storage is in head Case 30.

Oil passage 34 is connected with the bottom of head case 30.Oil passage 34 passes through journal bearing 26 and thrust bearing 28 And connected with the oily reservoir (not shown) of the bottom for being formed at bear box 24.

The lubricating oil r flowed down along oil passage 34 through being formed from the opening 30a (reference picture 2) of the bottom wall of head case 30 By journal bearing 26 and thrust bearing 28, flowed down to the oily reservoir in the rear of lubrication for providing these bearings.To the oil The lubricating oil that reservoir is flowed down returns to the lubricating oil store groove from outlet pipe arrangement 36, then carries out the treatment such as cooling down and being followed Ring is used.Therefore, in the state that provisionally lubrication oil r also flows comprising lubricating oil r of head case 30.

Head case 30 has can store cooled to these to the journal bearing 26 and the supply of the grade of thrust bearing 28 position Position cooled down required for sufficient amount lubricating oil capacity, such as 1~90 liter capacity of (L).

Then, the structure near centrifugal compressor 11 and head case 30 is illustrated according to Fig. 2.

Multiple blade 18a have radially been provided projectingly in the outer peripheral face of the wheel hub of impeller 18.By the rotation of impeller 18 And from entrance opening 14a leaked-in airs a through after blade 18a and by compression, by being arranged under blade 18a Swim the diffuser vane (not shown) of the stream of side and be decelerated, the dynamic pressure of flowing is converted into the rising of static pressure.

So air a as high pressure is discharged from the exit opening of outlet shell 14b, as combustion air to described interior Combustion engine main body is supplied.

Bear box 24 has the spaced walls that there is ring-type relative with gap with the back side 18b of impeller 18, armature spindle 16 Through spaced walls.Head case 30 is adjacently configured with impeller 18, and the wall 30b of the head case 30 of the side of impeller 18 constitutes the ring of bear box 24 A part for the spaced walls of shape.

Labyrinth 40 is configured between the spaced walls and impeller 18 of bear box 24.The shape of labyrinth 40 Into narrow labyrinth type stream fc, suppress to flow into the leakage stream between the spaced walls and impeller 18 of bear box 24.

Labyrinth 40 has the labyrinth type fin 44 of the peripheral part of the back side 18b for being configured at impeller 18.Labyrinth type Peripheral part of the fin 44 for example with the back side 18b of impeller 18 is integrally formed, by multiple ring-types for being diametrically separated from each other Projection is constituted.

In addition, labyrinth 40 has the labyrinth plate 42 of ring-type.Labyrinth plate 42 with its back side with The state that the spaced walls of the bear box 24 of the wall 30b comprising head case 30 are close to is fixed on the spaced walls of bear box 24.

Labyrinth type fin 46 is integrally provided with labyrinth plate 42.Labyrinth type fin 46 on radial direction by mutually dividing From multiple ring-types projection constitute, narrow labyrinth type stream fc is formed between labyrinth type fin 44.

Additionally, being formed with composition jog being fixed with the inner surface of the wall 30b of the head case 30 of labyrinth plate 42 Multiple wire projections 48, the jog be used for expand with interim storage in the contact area of the lubricating oil r of head case 30.Multiple lines Shape projection 48 extends in the horizontal direction respectively, is configured side by side across compartment of terrain in the vertical direction.

In the structure shown here, the lubricating oil r of normal temperature or so is supplied from the lubricating oil store groove to head case 30 and is provisionally store Deposit.The heat of the air as high temperature passes to storage via labyrinth plate 42 and wall 30b when by labyrinth type stream fc It is stored in the lubricating oil r of head case 30.

Now, the inner surface in wall 30b is formed with wire projection 48 as jog, due to enlarged wall 30b and lubricating oil r Between contact area, in other words expand area of dissipation, therefore, it is possible to promote the heat transfer between wall 30b and lubricating oil r.By This, the temperature for being prevented from labyrinth 40 rises, and the temperature for suppressing impeller 18 rises, therefore, it is possible to suppress impeller 18 Creep extends.

Especially because each wire projection 48 is configured along horizontal direction, thus the lubricating oil r flowed down in the head case 30 with Wire projection 48 is contacted and forms turbulent flow.Thus, lubricating oil r is stirred.Wire projection 48 is made by the mixing effect The temperature boundary layer on periphery is thinning, can promote the heat transfer between the wall 30b of head case 30 and lubricating oil r.

Fig. 3 represents the variation of above-mentioned implementation method.In the variation, multiple wire projections 50 of wall 30b are arranged at Extend in the vertical direction respectively, configured side by side across compartment of terrain in the horizontal direction.Other structures and above-mentioned implementation method It is identical.

According to the variation, because each wire projection 50 is configured along above-below direction, therefore lubricating oil r and wire projection 50 Contact and promote heat transfer between the two, and lubricating oil r can successfully be flowed down along wire projection 50, therefore successfully enter Row lubricating oil r to journal bearing 26 and thrust bearing 28 supply.

Then, other implementation methods of the invention are illustrated according to Fig. 4.In the present embodiment, replace above-mentioned Wire projection 48 or 50, and be formed with the through hole 52 for running through wall 30b, and on the back side of labyrinth plate 42 The radiating part 54 of tabular is provided with, the radiating part 54 is integrally formed by with the identical material of labyrinth plate 42, from running through Hole 52 is prominent to the inside of head case 30.The radiating part 54 of tabular is configured along horizontal direction.In addition, wall 30b and labyrinth sealing It is close on the back side oil-tightness ground of plate 42 so that lubricating oil r will not be from through hole 52 to the External leakage of head case 30.Other structures It is identical with above-mentioned implementation method.

According to present embodiment, because labyrinth plate 42 is integrally formed with radiating part 54 by identical material, because This can improve the heat conductivity between labyrinth plate 42 and radiating part 54, it is possible to increase labyrinth plate 42 and lubrication Heat-transfer effect between oily r.Also, because radiating part 54 is configured in the inside of head case 30 along horizontal direction, therefore in lubrication While being contacted with radiating part 54 while flow down when oily r is flowed down to opening 30a, therefore, it is possible to improve radiating part 54 and lubricating oil r it Between heat-transfer effect.

In addition, suitably determining the shapes and sizes of radiating part 54.For example, it is also possible to formed in wall 30b prolong in the horizontal direction The multiple through holes 52 stretched, and radiating part 54 is constituted by multiple bars, insert the plurality of bar to through hole 52.

Then, another embodiment of the present invention is illustrated according to Fig. 5.In the present embodiment, in head case 30 Inside, guiding sets the top of grease feed pipe 32 until it becomes with wall 30b identicals highly.Also, grease feed pipe 32 top end opening 32a (just to) relative towards wall 30b.Shown in other structures and the Fig. 1 for not forming wire projection 48 The structure of implementation method is identical.

In the structure shown here, the lubricating oil r that will be supplied from grease feed pipe 32 is blowed to wall 30b.By lubricating oil r's Collision stream such that it is able to make the temperature boundary layer of the lubricating oil r formed on the surface of wall 30b thinning, therefore, it is possible to promote wall 30b With the heat transfer between lubricating oil r.Therefore, it is possible to improve the sky of the labyrinth type stream fc formed through labyrinth plate 42 The cooling effect of gas.

In addition, used as the variation of above-mentioned implementation method, the opening of the grease feed pipe 32 being oppositely disposed with wall 30b is not The top of grease feed pipe 32 must be necessarily formed at.For example, it is also possible to grease feed pipe 32 side formed 1 or The multiple openings of person.

Then, another embodiment of the present invention is illustrated according to Fig. 6 and Fig. 7.

As shown in fig. 6, the exhaust turbo-supercharging machine of present embodiment is same with the exhaust turbo-supercharging machine 10 shown in Fig. 1, It is made up of centrifugal compressor 11, bearing portion 12 and exhaust driven gas turbine 13.

Centrifugal compressor 11 has compression case 14 and is accommodated in compression case 14 with being fixed on the state of armature spindle 16 Impeller 18, impeller 18 has multiple blade 18a for being disposed radially around.

Head case 30 is arranged at bear box 24, and is configured to the lubrication that storage is supplied to journal bearing 26 and thrust bearing 28 Oil.Labyrinth 40 is arranged between impeller 18 and bear box 24, the peripheral part of the back side 18b by being configured at impeller 18 On labyrinth type fin 44 and the labyrinth plate 42 that is integrally formed with labyrinth type fin 46 constitute.That is, except constituting heat Transmit promotion unit expansion section described later outside, with the implementation method identical structure shown in Fig. 1.

The expansion section of present embodiment is formed between bear box 24 and labyrinth plate 42, and internally It is formed with the arc-shaped space S r extended along the arc-shaped of labyrinth plate 42, a part and head case of arc-shaped space S r 30 inside connection.Arc-shaped space S r is formed at the wall 30b and the axle relative with the back side 18b of impeller 18 of the heavy wall of head case 30 The spaced walls of the heavy wall of housing 24 are held, is extended along the arc-shaped of labyrinth plate 42.

As shown in fig. 7, arc-shaped space S r with the vertical cross-section of armature spindle 16 on have C fonts, grease feed pipe 32 are connected with one end of arc-shaped space S r, and the other end of arc-shaped space S r is connected via intercommunicating pore 56 with head case 30.In addition, It is same with above-mentioned implementation method, the interval of the back side of ring-type labyrinth plate 42 and the wall 30b of head case 30 and bear box 24 Wall is close to configuration.

In the structure shown here, lubricating oil r is directly fed to arc-shaped space S r from grease feed pipe 32.Supply to arc-shaped The lubricating oil r of space S r flows into head case 30 around arc-shaped space S r mono- week from intercommunicating pore 56.

According to present embodiment, because the relatively low lubricating oil r of the temperature before being supplied to the main body of head case 30 is straight The arc-shaped space S r of supply to the expansion section as head case 30 is met, therefore, it is possible to further improve lubricating oil to labyrinth sealing The cooling effect of plate 42.

Further, since labyrinth plate 42 heat actually in circumferential whole region via the interval of bear box 24 Wall is transmitted to the lubricating oil r flowed in arc-shaped space S r, therefore, it is possible to expand the spaced walls with wall 30b and bear box 24 Contact area.Therefore, it is possible to promote the heat transfer of labyrinth plate 42 and lubricating oil r.

Additionally, lubricating oil r from grease feed pipe 32 flow into arc-shaped space S r, via master from intercommunicating pore 56 to head case 30 Body flows out.Therefore, the lubricating oil r of arc-shaped space S r has the flow velocity bigger than lubricating oil r in head case 30.Thereby, it is possible to enter One step promotes the heat transfer between labyrinth plate 42 and lubricating oil r.

Then, another embodiment of the present invention is illustrated according to Fig. 8 and Fig. 9.

Present embodiment is same with the implementation method shown in Fig. 6 and Fig. 7, in the wall 30b of the heavy wall comprising head case 30 The spaced walls of bear box 24 be formed with the arc-shaped space S r of C fonts.In addition, constituting the arc-shaped of the expansion section of head case 30 One end of space S r connects via intercommunicating pore 56 with the main body of head case 30, and the other end of arc-shaped space S r is via communication path 58 Connected with oil passage 34.Other structures are identical with the implementation method shown in Fig. 6 and Fig. 7.

In the present embodiment, the lubricating oil r for being supplied to the main body of head case 30 is flowed into as the arc-shaped space of expansion section Sr, after the weeks of arc-shaped space S r substantially, flows out via communication path 58 to oil passage 34.

According to present embodiment, because the lubricating oil r for supplying the main body to head case 30 is via intercommunicating pore 56 and arc-shaped Space S r flows out to oil passage 34, therefore, it is possible to the flow velocity of the lubricating oil flowed in arc-shaped space S r is remained at It is more than certain value.Therefore, it is possible to promote the heat transfer of the lubricating oil in arc-shaped space S r flowings and labyrinth plate 42, energy Enough improve the cooling effect of labyrinth plate 42.

Then, another embodiment of the present invention is illustrated according to Figure 10.

In the present embodiment, arc-shaped space S r has the circular opening 60 in the side opening of labyrinth plate 42.It is embedding Ring-type together in circular opening 60 is fitted together to back side protrusions of the wall 42a from labyrinth plate 42.In the present embodiment, expansion section Circular opening 60 is closed with ring-type chimeric wall 42a.

That is, the chimeric wall 42a of ring-type has jump relative to the back side of labyrinth plate 42, relative to the back side whole There is identical thickness in region, and its surface turns into flat shape.The chimeric wall 42a of ring-type is embedded in circular opening 60, Turn into oily close state between them.Other structures are identical with the implementation method shown in Fig. 6 and Fig. 7.

According to present embodiment, because arc-shaped space S r has a circular opening 60, therefore with the absence of circular opening 60 Situation compare, the handling ease and cost degradation of arc-shaped space S r can be made.

Further, since wall 42a chimeric with the ring-type of the one of labyrinth plate 42 and the profit for importeding into arc-shaped space S r Lubricating oil r directly contacts, therefore, it is possible to promote the heat transfer of labyrinth plate 42 and lubricating oil r.

In addition, in the several above-mentioned implementation method of arc-shaped space S r is formed with, arc-shaped space S r can also Extend in circumferential whole region.As long as the expansion section at least forming arc-shaped space S r is formed at the wall 30b of head case 30.

Industrial applicability

At least one implementation method of the invention, for example, be arranged at exhaust turbo-supercharging machine of marine engine etc. In, the temperature of the labyrinth that can suppress to be arranged at the back side of impeller with simple and inexpensive component rises.Cause This, the temperature that can suppress impeller rises, and suppresses the deformation of creep of impeller.

Symbol description

10 exhaust turbo-supercharging machines

11 centrifugal compressors

12 bearing portions

13 exhaust driven gas turbines

14 compression cases

14a entrance openings

14b exports shell

16 armature spindles

18 impellers

18a blades

The 18b back sides

20 turbine cases

22 turbine disks

23 turbo blades

24 bear boxes

26 journal bearings

28 thrust bearings

30 head cases

30a bottom openings

30b walls

32 grease feed pipes

34 oil passages

36 outlet pipe arrangements

40 labyrinths

42 labyrinth plates

42a ring-types are fitted together to wall

44th, 46 labyrinth type fin

48th, 50 projection

52 through holes

54 radiating parts

56 intercommunicating pores

58 communication paths

60 circular openings

Sr arc-shapeds space (expansion section)

A air

E waste gas

Fc labyrinth streams

R lubricating oil

Claims

1. a kind of supercharger, it is characterised in that have：

Bear box, the bear box storage bearing that rotatably supports the rotary shaft, and with the impeller The back side is relative；

Labyrinth, the labyrinth is arranged between the back side of the impeller and the bear box, comprising ring The labyrinth plate of shape and the labyrinth type fin with the labyrinth plate one；And

Heat transfer promotion unit, the heat transfer promotion unit is configured to the lubricating oil for promoting the head case to be stored and the labyrinth Heat transfer between formula sealing plate.

2. supercharger according to claim 1, it is characterised in that

The labyrinth plate is contacted with the head case, also,

3. supercharger according to claim 2, it is characterised in that

The multiple wire projection extends respectively along horizontal direction.

4. supercharger according to claim 2, it is characterised in that

The multiple wire projection extends respectively along above-below direction.

5. supercharger according to claim 1, it is characterised in that

The heat transfer promotion unit is made up of radiating part, and the radiating part is integrally formed with the labyrinth plate, to institute The inside for stating head case protrudes and is contacted with lubricating oil.

6. according to the supercharger that any one of Claims 1-4 is described, it is characterised in that

The heat transfer promotion unit is made up of oil port, and the oil port is formed at the grease feed pipe The head case inside extend part, towards the wall opening of the head case.

7. a kind of supercharger, it is characterised in that have：

Expansion section, the expansion section is formed between the bear box and the labyrinth plate, and is internally formed with The arc-shaped space extended along the labyrinth plate arc-shaped, at least a portion of the expansion section and the inside of head case Connection.

8. supercharger according to claim 7, it is characterised in that

The expansion section is internally formed with the arc-shaped space of C fonts extension, wherein, the expansion section is formed in the bearing Between housing and the labyrinth plate, and internally it is formed with what is extended along the labyrinth plate arc-shaped Arc-shaped space, at least a portion of the expansion section is connected with the inside of head case.

9. the supercharger according to claim 7 or 8, it is characterised in that

The grease feed pipe is connected with the expansion section.

10. according to the supercharger that any one of claim 7 to 9 is described, it is characterised in that

The supercharger has communication path, and the communication path is formed at the bear box and in the expansion section and the bearing Between extend.

11. supercharger according to claim 7 or 8, it is characterised in that

The labyrinth plate is by the closure of openings of the expansion section.