CN106715864B

CN106715864B - Supercharger

Info

Publication number: CN106715864B
Application number: CN201580040132.XA
Authority: CN
Inventors: 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: 2019-07-05
Anticipated expiration: 2035-07-13
Also published as: KR20170002636A; WO2016051916A1; JP2016075183A; CN106715864A; JP5964378B2; KR101873674B1

Abstract

Supercharger of the invention includes centrifugal compressor, has the impeller linked with rotary shaft；Bear box, storage rotatably freely support the bearing of the rotary shaft, and opposite with the back side of the impeller；Head case is configured to be set to the bear box and stores the lubricating oil supplied to the bearing；Labyrinth is arranged between the back side of the impeller and the bear box, the labyrinth type fin comprising cricoid labyrinth plate and with labyrinth plate one；And heat transmitting promotion unit, the heat transmitting being configured between the lubricating oil for promoting the head case to be stored and the labyrinth plate.

Description

Supercharger

Technical field

The present invention relates to the superchargers that the temperature for the impeller being able to suppress in rotation rises.

Background technique

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

In the narrow flow path of labyrinth, back of the leakage stream because of the stationary wall of bear box and the impeller of rotation Face and by stronger shearing force to being heated, further become high temperature.Labyrinth becomes high temperature, labyrinth as a result, The heat of formula sealing element is transmitted to impeller, and the back temperature of impeller rises.

As the material of impeller, from the point of view of low cost and good machinability, usually using aluminium alloy.But it is being centrifuged In the status of the high-pressure ratioization development of compressor, the back temperature of impeller rises, due to applying to impeller by rotation generation Centrifugal force, thus be 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, disclosing in patent document 1 The component of cooling lubricating oil is blowed to the top of the compressor impeller side shield plate at the back side for being configured at impeller and to shape The structure of cooling lubricating oil is supplied at the cooling space in compressor impeller side shield back.

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

In addition, Patent Document 3 discloses the annuluses for being formed with supply cooling air in labyrinth Structure.

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

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

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

It is blowed in component disclosed in patent document 1, the cooling lubricating oil only supplied to exhaust turbo-supercharging machine A part is blowed to the top of compressor impeller side shield plate, to keeping the top of compressor impeller side shield plate fully cold But it in the case where, needs to supply a large amount of cooling lubricating oil to exhaust turbo-supercharging machine.

In addition, needing to be formed in bear box or labyrinth in the component disclosed in patent document 2 and 3 Cooling space, and need to form for the access to cooling space supply cooling water, cooling air.Accordingly, there exist bearings Shell, labyrinth shape become complicated, exhaust turbo-supercharging machine manufacture and become high-cost problem.

Summary of the invention

At least one embodiment of the invention is the project in view of the conventional art and completes, it is intended that logical The lubricating oil using interim storage in head case is crossed, to prevent the temperature of impeller from rising with simple and inexpensive component.

(1) supercharger of at least one embodiment of the invention includes

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

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

Head case, the head case are set to the bear box and are configured to store the lubricating oil supplied to the bearing；

Labyrinth, the labyrinth are arranged between the back side of the impeller and the bear box, packet Labyrinth type fin containing cricoid labyrinth plate and with labyrinth plate one；And

Heat transmitting promotion unit, the heat transmit promotion unit be configured to the lubricating oil for promoting the head case to be stored with it is described Heat transmitting between labyrinth plate.

According to above structure (1), lead to heat transfer promotion unit, so as to promote institute in labyrinth plate and head case Heat transmitting between the lubricating oil of storage.A large amount of lubricating oil is provisionally stored in head case, is able to use a large amount of lubricating oil To cool down labyrinth.Therefore, with simple and inexpensive component the temperature of labyrinth can be inhibited to rise. Thereby, it is possible to prevent the temperature of impeller from rising, inhibit creep extension.

" head case " mentioned here is different from recess (recess), gap, access, has the axis that can be stored to supercharger It holds equal positions supply and these positions that are cooled is carried out with the capacity of the lubricating oil of the required full amount of cooling.

In addition, cooling down labyrinth type by transmitting hot between the lubricating oil and labyrinth plate by being stored in head case Sealing plate, therefore do not need the access of setting cooling water, cooling air.Therefore, it can be prevented with simple and inexpensive component The temperature of labyrinth and impeller rises, and inhibits creep extension.

As long as in addition, the supercharger with head case, it will be able to without significantly design alteration, be easy And setting heat transmits promotion unit at low cost.

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

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

The heat transmitting promotion unit is made of the bump for being formed in the inner surface of the head case.

According to above structure (2), bump can be formed by the inner surface in head case, to expand labyrinth plate The surface area of the head case contacted promotes the heat transmitting between the wall and lubricating oil.It therefore, can be with simple and inexpensive structure Part inhibits the temperature of labyrinth and impeller to rise, and is able to suppress the creep extension of impeller.

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

The bump is made of the multiple linear protrusions configured side by side,

The multiple threadiness protrusion extends respectively along horizontal direction.

According to above structure (3), bump is formed by horizontally extending linear protrusion, the lubricating oil and line flowed down Shape protrusion contacts and forms turbulent flow.Lubricating oil is stirred as a result, therefore the wall of head case can be promoted by mixing effect Heat transmitting between lubricating oil.Therefore, the temperature of labyrinth and impeller can be inhibited with simple and inexpensive component Degree rises, and is able to suppress the creep extension of impeller.

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

The bump is made of the multiple linear protrusions configured side by side,

The multiple threadiness protrusion extends respectively along up and down direction.

According to above structure (4), since bump is formed by the linear protrusion vertically extended, lubricating oil energy It is enough successfully to be flowed down along linear protrusion, therefore successfully it is lubricated supply of the oil to bearing etc..

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

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

According to above structure (5), heat conductivity can be improved between labyrinth plate and radiating part, therefore can be promoted Into the heat transmitting between labyrinth plate and lubricating oil.Thereby, it is possible to inhibit labyrinth type close with simple and inexpensive component The temperature of sealing and impeller rises, and is able to suppress the creep extension of impeller.

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

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

The heat transmitting promotion unit is made of oil port, which is formed in the head case The part of the grease feed pipe of internal stretch, towards the wall opening of the head case.

According to above structure (6), the lubricating oil supplied from grease feed pipe into head case is connect with labyrinth plate The wall of the head case of touching collides.Since the surface of the wall of the collision stream destruction head case of the lubricating oil is formed by the temperature side of lubricating oil Interlayer, therefore the heat transmitting between the wall and lubricating oil of promotion head case.Therefore, can inhibit to be confused with simple and inexpensive component The temperature of palace formula sealing element and impeller rises, and is able to suppress the creep extension of impeller.

(7) supercharger of at least one embodiment of the invention includes

Expansion section, the expansion section are formed between the bear box and the labyrinth plate, and in internal shape At there is the arc-shaped space extended along the labyrinth plate arc-shaped, it is connected at least partially with the inside of head case.

According to above structure (7), the profit provisionally stored in the arc-shaped space for being formed in the expansion section can be expanded Area of heat transfer between lubricating oil and labyrinth plate, therefore the heat between lubricating oil and labyrinth plate can be promoted to pass It passs.Therefore, the temperature of labyrinth and impeller can be inhibited to rise with simple and inexpensive component, is able to suppress impeller Creep extension.

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

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

According to above structure (8), by being extended expansion section C font, so as to further promote lubricating oil with Heat transmitting between labyrinth plate.

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

The grease feed pipe is connect with the expansion section.

It can be further due to the lubricating oil compared externally to expansion section supplying temperature according to above structure (9) Lubricating oil is improved to the cooling effect of labyrinth plate.

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

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

According to above structure (10), by the way that the communication path is arranged, so as to the lubrication that will be flowed in expansion section The flow velocity of oil remains at certain value or more.Therefore, lubricating oil and the labyrinth type flowed in arc-shaped space can be promoted Heat transmitting between sealing plate, can be improved the cooling effect of labyrinth plate.

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

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

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

According to above structure (11), since expansion section has the opening opposite with the back side of impeller, thus with there is no should The case where opening, is compared, and the handling ease of expansion section and cost effective can be made.

Also, since labyrinth plate forms the wall surface in arc-shaped space, labyrinth plate is straight with lubricating oil Contact can further promote the heat transmitting between labyrinth plate and lubricating oil.

At least one embodiment according to the present invention can inhibit labyrinth with simple and inexpensive component Temperature rise.Therefore, the temperature for being able to suppress impeller rises, and is able to suppress the creep extension of impeller.

Detailed description of the invention

Fig. 1 is the perspective view of the exhaust turbo-supercharging machine an of embodiment.

Fig. 2 is the longitudinal section view for indicating the heat transmitting promotion unit an of embodiment.

Fig. 3 is the longitudinal section view for indicating the heat transmitting promotion unit an of embodiment.

Fig. 4 is the longitudinal section view for indicating the heat transmitting promotion unit an of embodiment.

Fig. 5 is the longitudinal section view for indicating the heat transmitting promotion unit an of embodiment.

Fig. 6 is the longitudinal section view for indicating the heat transmitting promotion unit an of embodiment.

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

Fig. 8 is the longitudinal section view for indicating the heat transmitting promotion unit an of embodiment.

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

Figure 10 is the enlarged partial sectional view for indicating the heat transmitting promotion unit an of embodiment.

Specific embodiment

Hereinafter, being illustrated referring to attached drawing to several embodiments of the invention.But remembered about as embodiment Size, material, shape, its opposite configuration etc. of structure member carrying or shown in the drawings, it is not intended to will be of the invention Range be limited to this, be only to illustrate example.

For example, make " in some directions ", " along certain direction ", " parallel ", " orthogonal ", "center", " concentric " or " same The expression of the opposite or absolute configuration of the expressions such as axis " not only strictly indicates such configuration, be also represented by there are tolerance or Person can obtain the angle or distance and the state that is relatively displaced of the degree of identical function.

For example, the expression for making the expression such as " identical ", " equal " and " homogeneous " things be in equal state not only indicates tight The equal state of lattice is also represented by the state of the difference there are tolerance or the degree that can obtain identical function.

For example, make to indicate the expression of quadrangle, the shapes such as cylindrical shape not only indicate geometrically strictly to look like on four sides The shapes such as shape, cylindrical shape are also represented by the range that can obtain identical effect comprising including bump or corner portion etc. Shape.

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

An embodiment 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 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 have 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 includes bear box 24；Transverse bearing 26, in the inside of bear box 24 in 11 side of centrifugal compressor With this 2 positions of 13 side of exhaust driven gas turbine rotatably freely support of rotor shaft 16；And thrust bearing 28, in 11 side of centrifugal compressor 1 position support of rotor shaft 16.

Compression case 14 includes the entrance opening 14a in the axis upper opening of armature spindle 16；And have in outer peripheral surface The outlet shell 14b of the exit opening of tangential direction upper opening.

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

The exhaust 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 outflow.

Impeller 18 is rotated by the rotation of armature spindle 16, is attracted by the rotation of impeller 18 from entrance opening 14a Air a is simultaneously compressed, thus from the exit opening discharge 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 connect with the upper wall of head case 30.For example, in the external setting of exhaust turbo-supercharging machine 10 The lubricating oil store groove for the lubricating oil for having storage to supply to body of the internal-combustion engine (not shown) and exhaust turbo-supercharging machine 10 (is not schemed Show), lubricating oil is supplied to the body of the internal-combustion engine and exhaust turbo-supercharging machine 10 from the lubricating oil store groove via oil supply system. The lubricating oil supplied to exhaust turbo-supercharging machine 10 is supplied via grease feed pipe 32 to head case 30, and interim storage is in head Case 30.

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

The lubricating oil r flowed down via the opening 30a (referring to Fig. 2) for the bottom wall for being formed in head case 30 along oil passage 34 By transverse bearing 26 and thrust bearing 28, the rear under the oily reservoir stream of the lubrication of these bearings is being provided.To the oil The lubricating oil that reservoir flows down returns to the lubricating oil store groove from outlet piping 36, then carries out the processing such as cooling and is followed Ring uses.Therefore, head case 30 provisionally lubrication oil r also include lubricating oil r flowing state.

Head case 30, which has to store, to be supplied to the positions such as transverse bearing 26 and thrust bearing 28 and is cooled to these Position carries out the capacity of the lubricating oil of cooling required full amount, such as the capacity of 1~90 liter (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 surface of the wheel hub of impeller 18.Pass through the rotation of impeller 18 And from the air a of entrance opening 14a inflow after being compressed across blade 18a, by being set under blade 18a It swims the diffuser vane (not shown) of the flow path of side and is decelerated, the dynamic pressure of flowing is converted into the rising of static pressure.

It is discharged in this way as the air a of high pressure from the exit opening of outlet shell 14b, as combustion air to described interior The supply of combustion engine main body.

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

Labyrinth 40 is configured between the spaced walls and impeller 18 of bear box 24.40 shape of labyrinth At narrow labyrinth type flow path fc, inhibit 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 for 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, multiple cricoid by what is be separated from each other radially Protrusion is constituted.

In addition, labyrinth 40 has cricoid labyrinth plate 42.Labyrinth plate 42 with its back side with The state that the spaced walls of bear box 24 including 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 cricoid protrusions constitute, narrow labyrinth type flow path fc is formed between labyrinth type fin 44.

In addition, being formed with composition bump on the inner surface of the wall 30b for the head case 30 for being fixed with labyrinth plate 42 Multiple linear protrusions 48, the bump is for expanding and interim storage is in the contact area of the lubricating oil r of head case 30.Multiple lines Shape protrusion 48 extends in the horizontal direction respectively, configures side by side across compartment of terrain in the up-down direction.

In this configuration, the lubricating oil r of room temperature or so is supplied to head case 30 from the lubricating oil store groove and provisionally store It deposits.Heat when through labyrinth type flow path fc as the air of high temperature passes to storage via labyrinth plate 42 and wall 30b It is stored in the lubricating oil r of head case 30.

At this point, the inner surface in wall 30b is formed with linear protrusion 48 as bump, due to enlarged wall 30b and lubricating oil r Between contact area, in other words expand heat dissipation area, therefore can promote between wall 30b and lubricating oil r heat transmitting.By This, can prevent the temperature of labyrinth 40 from rising, and inhibit the temperature of impeller 18 to rise, therefore be able to suppress impeller 18 Creep extension.

Especially because each threadiness protrusion 48 lubricating oil r for configuring along horizontal direction, therefore being flowed down in head case 30 with Linear protrusion 48 contacts and forms turbulent flow.Lubricating oil r is stirred as a result,.Make linear protrusion 48 by the mixing effect The temperature boundary layer on periphery is thinning, can promote the heat transmitting between the wall 30b of head case 30 and lubricating oil r.

The variation of Fig. 3 expression above embodiment.In the variation, multiple linear protrusions 50 of wall 30b are set to Extend in the up-down direction respectively, is configured side by side across compartment of terrain in the horizontal direction.Other structures and above embodiment It is identical.

According to the variation, since each linear protrusion 50 is configured along up and down direction, lubricating oil r and linear protrusion 50 Contact and promote heat transmitting between the two, and lubricating oil r can successfully be flowed down along linear protrusion 50, thus successfully into Supply of the row lubricating oil r to transverse bearing 26 and thrust bearing 28.

Then, other embodiments of the invention are illustrated according to Fig. 4.In the present embodiment, replace above-mentioned Linear protrusion 48 or 50, and be formed with the perforative through hole 52 of wall 30b, and on the back side of labyrinth plate 42 It is provided with the radiating part 54 of plate, which is integrally formed by material identical with labyrinth plate 42, from running through Hole 52 is prominent to the inside of head case 30.The radiating part 54 of plate is configured along horizontal direction.In addition, wall 30b and labyrinth sealing The back side oil-tightness of plate 42 it is close to, 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 as above embodiment.

According to the present embodiment, it is integrally formed with radiating part 54 by identical material due to labyrinth plate 42, because This can be improved the heat conductivity between labyrinth plate 42 and radiating part 54, can be improved labyrinth plate 42 and lubrication Heat-transfer effect between oily r.Also, it since radiating part 54 is configured in the inside of head case 30 along horizontal direction, is lubricating Oily r is flowed down while contact on one side with radiating part 54 when flowing down to opening 30a, thus can be improved 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 prolong in the horizontal direction in wall 30b formation The multiple through holes 52 stretched, and radiating part 54 is constituted by multiple bars, multiple bar is inserted into 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, the top of guidance setting grease feed pipe 32 is until it becomes height identical with wall 30b.Also, grease feed pipe 32 top end opening 32a is towards wall 30b and with respect to (face).Other structures with do not form the shown in FIG. 1 of linear protrusion 48 The structure of embodiment is identical.

In this configuration, the lubricating oil r supplied from grease feed pipe 32 is blowed to wall 30b.Pass through lubricating oil r's The temperature boundary layer of collision stream, the lubricating oil r formed on the surface so as to make wall 30b is thinning, therefore can promote wall 30b Heat transmitting between lubricating oil r.Therefore, it can be improved the sky that labyrinth type flow path fc is formed by across labyrinth plate 42 The cooling effect of gas.

In addition, the variation as above embodiment, not with the opening of the grease feed pipe 32 of wall 30b relative configuration The top of grease feed pipe 32 must be centainly formed in.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 and exhaust turbo-supercharging machine shown in FIG. 1 10 are same, It is made 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 set to bear box 24, and is configured to store the lubrication supplied to transverse bearing 26 and thrust bearing 28 Oil.Labyrinth 40 is set 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, in addition to constituting heat Except the aftermentioned expansion section for transmitting promotion unit, there is the structure being same as the implementation shown in figure 1.

The expansion section of present embodiment is formed between bear box 24 and labyrinth plate 42, and in inside It is formed with the arc-shaped space S r extended along 42 arc-shaped of labyrinth plate, a part and head case of arc-shaped space S r 30 inside connection.Arc-shaped space S r is formed in the wall 30b and the axis opposite with the back side 18b of impeller 18 of the heavy wall of head case 30 The spaced walls for holding the heavy wall of shell 24 extend along 42 arc-shaped of labyrinth plate.

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

In this configuration, lubricating oil r is directly fed to arc-shaped space S r from grease feed pipe 32.It supplies 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 the present embodiment, since the lower lubricating oil r of temperature before capable of supplying 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 lubricating oil can be further increased to labyrinth sealing The cooling effect of plate 42.

In addition, due to labyrinth plate 42 heat actually in circumferential whole region via the interval of bear box 24 Wall can expand the spaced walls with wall 30b and bear box 24 to the lubricating oil r transmitting flowed in arc-shaped space S r Contact area.Therefore, the heat of labyrinth plate 42 and lubricating oil r can be promoted to transmit.

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

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

Present embodiment is same as Fig. 6 and embodiment shown in Fig. 7, including 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 font.In addition, constituting the arc-shaped of the expansion section of head case 30 One end of space S r is connected to 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 It is connected to oil passage 34.Other structures are identical as Fig. 6 and embodiment shown in Fig. 7.

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

According to the present embodiment, due to making the lubricating oil r supplied to the main body of head case 30 via intercommunicating pore 56 and arc-shaped Space S r is flowed out to oil passage 34, therefore can remain at the flow velocity of the lubricating oil flowed in arc-shaped space S r It is more than certain value.Therefore, can promote to transmit in the heat of the arc-shaped space S r lubricating oil flowed 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 42 side opening of labyrinth plate.It is embedding It is prominent from the back side of labyrinth plate 42 together in the chimeric wall 42a of ring-type of circular opening 60.In the present embodiment, expansion section Circular opening 60 is closed with ring-type chimeric wall 42a.

That is, cyclic annular chimeric wall 42a has scale relative to the back side of labyrinth plate 42, relative to the back side entire Thickness having the same in region, and its surface becomes flat shape.The chimeric wall 42a of ring-type is embedded in circular opening 60, Become the close state of oil between them.Other structures are identical as Fig. 6 and embodiment shown in Fig. 7.

According to the present embodiment, due to arc-shaped space S r have circular opening 60, be not present circular opening 60 The case where compare, the handling ease of arc-shaped space S r and cost effective can be made.

In addition, due to wall 42a chimeric with the ring-type of the one of labyrinth plate 42 and importeding into the profit of arc-shaped space S r Lubricating oil r is directly contacted, therefore the heat of labyrinth plate 42 and lubricating oil r can be promoted to transmit.

In addition, arc-shaped space S r also may not necessarily in the several above embodiment for being formed with arc-shaped space S r Extend in circumferential whole region.As long as the expansion section at least forming arc-shaped space S r is formed in the wall 30b of head case 30.

Industrial availability

At least one embodiment according to the present invention, in the exhaust turbo-supercharging machine etc. for being for example set to marine engine In, the temperature rising of the labyrinth at the back side for being set to impeller can be inhibited with simple and inexpensive component.Cause This, the temperature for being able to suppress impeller rises, and inhibits 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 opening

14b exports shell

16 armature spindles

18 impellers

18a blade

The back side 18b

20 turbine cases

22 turbine disks

23 turbo blades

24 bear boxes

26 transverse bearings

28 thrust bearings

30 head cases

30a bottom opening

30b wall

32 grease feed pipes

34 oil passages

36 outlet pipings

40 labyrinths

42 labyrinth plates

42a ring-type is fitted into wall

44,46 labyrinth type fin

48,50 protrusion

52 through holes

54 radiating parts

56 intercommunicating pores

58 communication paths

60 circular openings

Sr arc-shaped space (expansion section)

A air

E exhaust gas

Fc labyrinth flow path

R lubricating oil

Claims

1. a kind of supercharger comprising:

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

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

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

2. supercharger according to claim 1, which is characterized in that

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

3. supercharger according to claim 2, which is characterized in that

The bump is made of the multiple linear protrusions configured side by side,

4. supercharger according to claim 2, which is characterized in that

The bump is made of the multiple linear protrusions configured side by side,

5. supercharger according to claim 1, which is characterized in that

The heat transmitting promotion unit is made of radiating part, which is integrally formed with the labyrinth plate, to institute It states the inside protrusion of head case and is contacted with lubricating oil.

6. supercharger according to any one of claims 1 to 4, which is characterized in that

The heat transmitting promotion unit is made of oil port, which is formed in the grease feed pipe The internal stretch in the head case part, towards the wall opening of the head case.

7. a kind of supercharger comprising:

Expansion section, the expansion section are formed between the bear box and the labyrinth plate, and are formed in inside The arc-shaped space extended along the labyrinth plate arc-shaped, the inside of at least part and head case of the expansion section Connection.

8. supercharger according to claim 7, which is characterized in that

The expansion section is formed with the arc-shaped space of C font extension in inside, wherein the expansion section is formed in the bearing Between shell and the labyrinth plate, and it is formed in inside and extends along the labyrinth plate arc-shaped Arc-shaped space, at least part of the expansion section are connected to the inside of head case.

9. supercharger according to claim 7 or 8, which is characterized in that

The grease feed pipe is connect with the expansion section.

10. supercharger according to claim 7 or 8, which is characterized in that

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

11. supercharger according to claim 7 or 8, which is characterized in that

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