CN107250557A

CN107250557A - Fluid machinery and its manufacture method

Info

Publication number: CN107250557A
Application number: CN201680004700.5A
Authority: CN
Inventors: 原贤; 原贤一
Original assignee: Mitsubishi Heavy Industries Ltd
Current assignee: Mitsubishi Heavy Industries Marine Machinery and Equipment Co Ltd
Priority date: 2015-02-25
Filing date: 2016-02-23
Publication date: 2017-10-13
Anticipated expiration: 2036-02-23
Also published as: KR20170088941A; JP2016156341A; WO2016136706A1; CN107250557B; KR101939517B1; JP6430286B2

Abstract

The present invention provides a kind of centrifugal blower, and it possesses：Metal impeller housing (54), it forms space (S1) and linked with recirculation pipe (84)；And corrosion resistant component (57a), the configuration of its state linked with impeller housing (54) and recirculation pipe (84) is engaged between impeller housing (54) and recirculation pipe (84) and with impeller housing (54), to be formed with anti-corrosion layer (58a) in the way of the end for covering space (S1) side at junction surface of impeller housing (54) and corrosion resistant component (57a).

Description

Fluid machinery and its manufacture method

Technical field

The present invention relates to a kind of fluid machinery and its manufacture method for conveying corrosive gas.

Background technology

Generally, the exhaust discharged from internal combustion engines such as marine diesel engines is the corrosive gas for including NOx, SOx etc..It is logical NOx, the SOx and water included in excessive erosion gas reacts and generates the acidic materials that nitric acid, sulfuric acid etc. corrode metal part.

It is thus known that having in the fluid machineries such as the air blower of conveying corrosive gas, in order to improve the corrosion resistant to acidic materials Corrosion, the technology for the part for constituting fluid machinery is coated with resistant material (for example, referenced patent document 1.).

Patent document 1 is the technology for the metal brake blade surface that flue gas desulfurization equipment aerofoil fan is coated with resin bed.

Conventional art document

Patent document

Patent document 1：No. 3426863 publications of Japanese Patent No.

The content of the invention

The invention technical task to be solved

Described technology is come to the independent gold being assemblied in inside fluid machinery with resistant material in patent document 1 Category part processed carries out the technology of overlay film.Therefore, before assembling fluid machinery, by the metal portion in corrosive gas Part carries out overlay film with resistant material respectively, and the metal part of overlay film then is assemblied in into the inside of fluid machinery, by This can produce the fluid machinery for improving corrosion resistance.

However, the linking portion and and other equipment of the metal part linked in the inside of fluid machinery and miscellaneous part Excessive load may be applied in the linking portion of the metal part of link, tightening operation when entering joining line etc.. Therefore, even if overlay film is carried out to the metal part linked with resistant material in advance, also because entering fastening during joining line Operation etc. and may result in corrosion resistant material from metal part stripping.

On the other hand, after assembling fluid machinery, if with resistant material come the company to metal part and miscellaneous part Knot point carries out overlay film, then can improve the corrosion resistance of metal part.

However, in the case that more small-sized fluid machinery etc. has the linking portion that overlay film is difficult to after assembling, it is impossible to improve The corrosion resistance of the metal part of the linking portion.

The present invention is to complete in light of this situation, and its object is to provide a kind of to improve what fluid machinery possessed The fluid machinery and its manufacture method of the corrosion resistance of the linking portion of metal part and miscellaneous part.

Means for solving technical task

To achieve these goals, the present invention uses following methods.

Fluid machinery involved by the mode of the present invention possesses：The part of metal system the 1st, it forms the sky of conveying corrosive gas Between and with the 2nd part link；And corrosion resistant component, its state linked with the 1st part and the 2nd part, which is configured, to exist Engage between 1st part and the 2nd part and with the 1st part, to cover the 1st part and the corrosion resistant The mode for losing the end of the space side at the junction surface of part is formed with anti-corrosion layer.

In the fluid machinery involved by a mode in the present invention, the space of conveying corrosive gas is being formed and with the The part of metal system the 1st that 2 parts link is bonded to corrosion resistant component.Also, the state linked with the 1st part and the 2nd part, Corrosion resistant component is configured between them.

Therefore, the situation of excessive load is applied in tightening operation when because of the 1st part and the link of the 2nd part etc. Under, also ensure that the corrosion resistance at the junction surface of the 1st part engaged with corrosion resistant component.

Also, to be formed with corrosion resistant in the way of the end for covering the space side at junction surface of the 1st part and corrosion resistant component Lose layer.

It is therefore prevented that corrosive substance invades junction surface from the end of the space side at the 1st part and the junction surface of corrosion resistant component.

In this way, the fluid machinery according to involved by the mode of the present invention, it is possible to increase the 1st part that fluid machinery possesses with The corrosion resistance of the linking portion of 2nd part.

Fluid machinery involved by the mode of the present invention can be following structure：Possess：Impeller, it is rotated about the axis simultaneously And the corrosive gas flowed into from outside is blowed, the 1st part is internally to accommodate the impeller and possess edge The corrosive gas that the axis is flowed into is guided to the impeller housing of internal suction inlet, the 2nd part for formed with It is formed at the 2nd flange part of the 1st flange part link of the suction inlet and guides the corrosive gas to the suction inlet Part, the corrosion resistant component engages with the 1st flange part.

According to the fluid machinery of this structure, it is bonded in the 1st flange part for being formed at the suction inlet of metal impeller housing Corrosion resistant component.Also, with the 1st flange part of the suction inlet for being formed at impeller housing and it is formed at link with impeller housing the The state that 2nd flange part of 2 parts links, configures corrosion resistant component between them.

Therefore, tightening operation when the 2nd flange part of the 1st flange part because of impeller housing and the 2nd part links Deng and in the case of being applied in excessive load, also ensure that the corrosion resistant at the junction surface of the 1st flange part engaged with corrosion resistant component Corrosion.

Also, it is corrosion-resistant to be formed with the way of the end for covering the space side at junction surface of impeller housing and corrosion resistant component Layer.It is therefore prevented that corrosive substance invades junction surface from the end of the space side at impeller housing and the junction surface of corrosion resistant component.

Fluid machinery involved by the mode of the present invention can be following structure：Possess：Impeller, it is rotated about the axis simultaneously And blow the corrosive gas flowed into from outside；And rotary shaft, it links with the impeller and around axis rotation, 1st part is the impeller housing for internally accommodating the impeller and possessing the 1st flange part for being formed at the rotation shaft side Body, the 2nd part is the outer peripheral face for possessing the 2nd flange part linked with the 1st flange part and configuration in the rotary shaft And suppress the seal box of the sealing of the outflow of the corrosive gas in the impeller housing, the corrosion resistant component with The 1st flange part engagement.

According to the fluid machinery of this structure, engaged in the 1st flange part for being formed at the rotation shaft side of metal impeller housing There is corrosion resistant component.Also, with the 1st flange part of the rotation shaft side for being formed at impeller housing and it is formed at and impeller housing link Seal box the 2nd flange part link state, corrosion resistant component is configured between them.

Therefore, tightening operation when the 2nd flange part of the 1st flange part because of impeller housing and seal box links etc. And in the case of being applied in excessive load, also ensure that the 1st flange part engaged with corrosion resistant component junction surface it is corrosion-resistant Property.

Fluid machinery involved by the mode of the present invention can be following structure：Possess：Impeller, it is rotated about the axis simultaneously And blow the corrosive gas flowed into from outside；And rotary shaft, it links with the impeller and around axis rotation, 2nd part is the impeller housing for internally accommodating the impeller and possessing the 2nd flange part for being formed at the rotation shaft side Body, the 1st part is the outer peripheral face for possessing the 1st flange part linked with the 2nd flange part and configuration in the rotary shaft And suppress the seal box of the sealing of the outflow of the corrosive gas in the impeller housing, the corrosion resistant component with The 1st flange part engagement.

According to the fluid machinery of this structure, corrosion resistant component is bonded in the 1st flange part for being formed at metal seal box. Also, the shape linked with the 1st flange part for being formed at seal box and the 2nd flange part of the rotation shaft side for being formed at impeller housing State, configures corrosion resistant component between them.

Therefore, tightening operation when the 2nd flange part of the 1st flange part because of seal box and impeller housing links etc. And in the case of being applied in excessive load, also ensure that the 1st flange part engaged with corrosion resistant component junction surface it is corrosion-resistant Property.

Also, to be formed with anti-corrosion layer in the way of the end for covering the space side at junction surface of seal box and corrosion resistant component. It is therefore prevented that corrosive substance invades junction surface from the end of the space side at seal box and the junction surface of corrosion resistant component.

Fluid machinery involved by the mode of the present invention can be following structure：Possess：Impeller, it is rotated about the axis simultaneously And the corrosive gas flowed into from outside is blowed, the 1st part is internally to accommodate the impeller and possess edge The corrosive gas that the axis is flowed into guides the corruption blowed to internal suction inlet and discharge by the impeller The impeller housing of the outlet of corrosion gas, the 2nd part is that the 1st flange part to form and be formed at the outlet links The 2nd flange part and formed make from the outlet discharge the corrosive gas circulation passing away part, institute Corrosion resistant component is stated to engage with the 1st flange part.

In the fluid machinery involved by a mode in the present invention, the space of conveying corrosive gas and formation are being formed Corrosion resistant component is bonded in the 1st flange part of the outlet of the metal impeller housing linked with the 2nd part.Also, with leaf The state that 2nd flange part of the 1st flange part and the 2nd part of taking turns housing links, configures corrosion resistant component between them.

Therefore, connect even in the 1st flange part of the outlet because being formed at impeller housing and the 2nd flange part of the 2nd part Tightening operation during knot etc. and in the case of being applied in excessive load, also ensure that the 1st flange part engaged with corrosion resistant component Junction surface corrosion resistance.

Also, to be formed with anti-corrosion layer in the way of the end for covering the space side at junction surface of the 1st part and corrosion resistant component. It is therefore prevented that corrosive substance invades junction surface from the end of the space side at impeller housing and the junction surface of corrosion resistant component.

In the fluid machinery involved by a mode in the present invention, the corrosive gas can be comprising nitrogen oxides or The gas of oxysulfide.

By so setting, can suppress the nitric acid that is reacted and generated by the nitrogen oxides included in corrosive gas and water or Sulfuric acid that oxysulfide and water react and generated and corrode the part of metal system the 1st.

In the fluid machinery involved by a mode in the present invention, the corrosion resistant component can pass through cold welding and the described 1st Part is engaged.

By so setting, can not occur Volume Changes and be securely engaged the 1st part and corrosion resistant component.Also, can be same When be machined through corrosion resistant component and the 1st part that cold welding is combined into one, so as to improve the application property of machining.

The manufacture method of fluid machinery involved by the mode of the present invention possesses：Forming the sky of conveying corrosive gas Between and engage the bonding process of corrosion resistant component with the part of metal system the 1st that the 2nd part links；In the institute of the 1st part The process for stating opposed faces formation anti-corrosion layer；By institute in the way of configuring the corrosion resistant component between the 2nd part State the process that the 1st part links with the 2nd part；And to cover the junction surface of the 1st part and the corrosion resistant component The space side end the mode process that forms anti-corrosion layer.

In the fluid machinery manufactured by the manufacture method involved by the mode of the present invention, corrosivity is conveyed being formed The space of gas and with the 2nd part link the part of metal system the 1st be bonded to corrosion resistant component.Also, with the 1st part and The state that 2 parts link, configures corrosion resistant component between them.

Also, to be formed with corrosion resistant in the way of the end for covering the space side at junction surface of the 1st part and corrosion resistant component Lose layer.It is therefore prevented that corrosive substance is engaged from the end intrusion of the 1st part with the space side at the junction surface of corrosion resistant component Portion.

In this way, the manufacture method of the fluid machinery according to involved by the mode of the present invention, can produce and improve fluid machine The 1st part and the fluid machinery of the corrosion resistance of the linking portion of the 2nd part that tool possesses.

Invention effect

In accordance with the invention it is possible to provide a kind of company for improving metal part that fluid machinery possesses and miscellaneous part The fluid machinery and its manufacture method of the corrosion resistance of knot point.

Brief description of the drawings

Fig. 1 is the summary construction diagram for the exhaust gas recycling system for representing present embodiment.

Fig. 2 is the partial, longitudinal cross-sectional for representing the centrifugal blower shown in Fig. 1.

Fig. 3 is the partial enlarged drawing of the position P1 shown in Fig. 2.

Fig. 4 is the partial enlarged drawing of the position P2 shown in Fig. 2.

Fig. 5 is the partial enlarged drawing of the position P3 shown in Fig. 2.

Fig. 6 is the A-A of the bearing portion shown in Fig. 2 to sectional view.

Embodiment

Hereinafter, refer to the attached drawing is illustrated to the exhaust gas recycling system of present embodiment.

The exhaust gas recycling system of present embodiment is that a part for the exhaust (corrosive gas) produced by fuel combustion is mixed Enter in combustion air and reduce ignition temperature to realize the system for reducing NOx.

In the exhaust gas recycling system of present embodiment, a part for exhaust is mixed into combustion air and to reduce oxygen dense Degree, is that burning velocity slows down by the reaction between fuel and oxygen.

Thus, peak flame temperature declines, and NOx generation is suppressed.

As shown in figure 1, the exhaust gas recycling system 100 of present embodiment possesses Ship Propeling main frame i.e. marine engine 10th, the washer being vented by the exhaust discharged from marine engine 10 come the booster 20 being pressurized, EGR valve 30, cleaning 40th, the centrifugal blower 50 (fluid machinery) of exhaust is blowed, the aerial cooler 60 of compressed air is cooled down and will be vented to ship The chimney 70 of outside discharge.

In the present embodiment, internal combustion engine is marine engine 10, moreover, being marine diesel engine and to make propeller The Ship Propeling main frame of rotation (is omitted and illustrated) in axle and propulsion with propeller.

Marine engine 10 is by making the fuel combustion used for diesel engine such as heavy oil or light oil and obtaining make what propeller shaft rotated Driving force.The exhaust by generation of burning in marine engine 10 is expelled to blast pipe 81 and via blast pipe 81 to supercharging Device 20 is supplied.Blast pipe 81 is the pipe arrangement for guiding the exhaust discharged from marine engine 10 to booster 20.

Booster 20 possesses turbine 21 and compressor 22, and possesses the armature spindle 23 that them are installed at two ends.

Turbine 21 from the exhaust gas drive that blast pipe 81 is flowed into by rotating armature spindle 23.Compressor 22 has with rotor The rotation of axle 23 and the turbine wheel (omit diagram) rotated, and compress by the rotation of turbine wheel extraneous air and Guided to aerial cooler 60.

Exhaust as the power for making the rotation of turbine 21 is flowed into blast pipe 82.

EGR valve 30 flows into the row guided in the exhaust of blast pipe 82 via recirculation pipe 84,85 to air inlet pipe 86 for adjustment The device of the flow of gas.Its one end of EGR valve 30 (upstream end) is connected with the downstream of blast pipe 82, and the other end (downstream) is with washing Device 40 is washed to connect.The aperture of valve body mechanism that EGR valve 30 possesses by adjusting inside it (omitting diagram), adjustment relative to The guiding of the exhaust total flow circulated in blast pipe 82 to the exhaust of recirculation pipe 84 flow.

Other exhausts in addition to being flowed into the exhaust of EGR valve 30 are directed to blast pipe 83, and from chimney 70 to ship Outside discharge.

Washer 40 be using the liquid such as water as cleaning fluid by the particle (NOx, SOx, coal dust etc.) in exhaust cleaning The device to be separated is trapped in the drop and liquid film of liquid.Washer 40 is trapped from the particle in the exhaust of the inflow of EGR valve 30, And supply the exhaust cleaned to recirculation pipe 84.

In washer 40, the cleaning fluid for having trapped the particle in exhaust is supplied to water treatment facilities 42 by pump 41.Water process Device 42 removes the particle in the exhaust included in cleaning fluid, and cleaning fluid is supplied to washer 40.

The temperature that the exhaust of washer 40 is flowed into from EGR valve 30 is, for example, 250 DEG C~300 DEG C.In contrast, from washer The temperature of 40 exhausts flowed into recirculation pipe 84 is about 50 DEG C.The temperature drop being so vented is vented because cleaning fluid absorbs Caused by heat.

Exhaust that centrifugal blower 50 supplies for compression from recirculation pipe 84 and blowed (conveying) and to recirculation pipe The fluid machinery of 85 supplies.Supply to the washed device 40 of exhaust of centrifugal blower 50 and purified, but containing a certain degree of NOx、SOx.Also, also containing a certain degree of by acid such as the nitric acid, the sulfuric acid that are reacted and generated with water such as these NOx, SOx Property material.

As be described hereinafter, the centrifugal blower 50 of present embodiment turns into the corrosion resistance having ensured that to acidic materials such as nitric acid, sulfuric acid Structure.

Air that aerial cooler 60 is compressed for cooling by the compressor 22 of booster 20 and via air inlet pipe 86 to ship With the device of cylinder (omitting diagram) supply air of internal combustion engine 10.Aerial cooler 60 is to be supplied by cooling down from compressor 22 Air and increase the gas density of air and improve compression ratio with the device for the output for improving marine engine 10.

Aerial cooler 60 cools down the air supplied from compressor 22 respectively and the exhaust supplied from recirculation pipe 85 is laggard Row is mixed and supplied as mixed gas, and to air inlet pipe 86.Supplied via air inlet pipe 86 to the gaseous mixture of marine engine 10 Body has been cooled and its oxygen concentration step-down.Therefore, the exhaust gas recycling system 100 of present embodiment can improve marine diesel The output of machine 10 and the generation for suppressing NOx.

Then, the centrifugal blower 50 of present embodiment is illustrated with reference to Fig. 2~Fig. 6.

As shown in Fig. 2 centrifugal blower 50 possesses impeller 51, rotary shaft 52, drive motor 53, impeller housing 54, seal box 55 And bearing portion 56.

Also, as shown in Fig. 3~Fig. 5, the centrifugal blower 50 of present embodiment possesses corrosion resistant component 57a~57e and corrosion resistant Lose layer 58a~58d.

The revolving force that impeller 51 is transmitted by drive motor 53 via drive shaft 53a and rotary shaft 52 rotates simultaneously around axis X And the exhaust supplied from recirculation pipe 84 is boosted and defined flow is blowed.Impeller 51 possess discoideus mainboard 51a, Multiple blade 51cs of the isometrical discoideus side plate 51b and configuration between mainboard 51a and side plate 51b with mainboard.

Rotary shaft 52 is the part for linking with impeller 51 and being rotated around axis X.As shown in Fig. 2 longitudinal section, rotation Axle 52 and impeller 51 turn into 1 part formed as one.

Rotary shaft 52 and impeller 51 are formed by intensity height and the metallic material with corrosion resistance.It is used as metallic material, example Such as it can be used SUS317 that there is the nickel alloys such as the stainless steel and INCONEL (registration mark) of corrosion resistance.

Drive motor 53 is to possess the drive shaft 53a linked with rotary shaft 52 and make what drive shaft 53a rotated around axis X Device.As drive motor 53, using various motors such as so-called d.c. motor and alternating current motor or built-in adjustable The motor of turn over speed and the gear structure of torque.

As shown in Fig. 2 impeller housing 54 is guiding is from the guide part 54a of the exhaust of the supply of recirculation pipe 84 and internally holds The part that the housing section 54b of impeller 51 that receives is formed as one by metallic material.As metallic material, for example, ash can be used The cast iron materials such as cast iron and spheroidal graphite cast-iron.

The guide part 54a of impeller housing 54 possesses the opposed faces opposed with the space S 1 of conveying exhaust and and recirculation pipe 84 link.

Also, the housing section 54b of impeller housing 54 possesses the opposed faces opposed with the space S 2 of conveying exhaust and and seal box 55 link.

Also, the housing section 54b of impeller housing 54 possess with the opposed opposed faces of space S 3 of conveying exhaust and with recycling Pipe 85 links.

Impeller housing 54 possess the exhaust guiding that will be supplied from recirculation pipe 84 along axis X to internal suction inlet 54c and The outlet 54d that the exhaust blowed by impeller 51 is discharged to recirculation pipe 85.

Guided from the exhaust that suction inlet 54c is flowed into the space S 1 formed by guide part 54a.Guiding is to the exhaust of space S 1 along axle Line X is flowed into the inside of impeller 51, and from axis X direction be drawn towards the radial direction orthogonal with axis X direction and through blade 51c Guide to space S 2.Guide to space S 2 exhaust be blown to the space S 3 of outlet 54d sides and from outlet 54d to recycling Pipe 85 is discharged.

The drum for the linking part that seal box 55 links for one end of receiving rotary shaft 52 with drive shaft 53a one end Metal part.

As the metallic material for forming seal box 55, the cast iron materials such as usable gray cast iron and spheroidal graphite cast-iron.

The end of the side of impeller 51 in the axis X direction of seal box 55 links with impeller housing 54, the axis X side of seal box 55 To the end of the side of drive motor 53 link with drive motor 53.

Seal box 55 possesses the opposed faces opposed with the space S 2 of conveying exhaust and linked with impeller housing 54.

The end face of the side of impeller 51 inside seal box 55 is fastening bolt to be provided with by way of surrounding rotary shaft 52 Dry gas seals part (sealing) 55f.

Dry gas seals part 55f makes for the supply air of space S 4 from seal gas air inlet to the inside for being formed at seal box 55 The component that air is flowed into from space S 4 to space S 2.By the way that space S 4 to be maintained to the state than the more high pressure of space S 2, suppress rotten Corrosion gas is that exhaust is flowed into from space S 2 to space S 4.

Space S 5 is separately formed with the inside of seal box 55 and space S 4, space S 5, which turns into, passes through multiple intercommunicating pores 55b and ft connection state.Because space S 5 maintains atmospheric pressure, even if therefore being flowed into sky from seal gas air inlet 55a Between S4 air be flowed into space S 5, institute's leaked-in air can also be discharged from intercommunicating pore 55b.Therefore, suppress to enter from seal gas The pressure transmission of the air of gas port 55a supplies is to drive motor 53.

Space S 5 inside seal box 55 accommodates drive shaft 53a and rotary shaft 52 linking portion, so that sometimes Occur the temperature as caused by windage loss of the linking portion etc. to rise.In this case, by will be flowed into the air of space S 5 from Intercommunicating pore 55b is discharged, or is set to divulge information between the inside of space S 5 and extraneous gas, also has the temperature for suppressing space S 5 to rise Effect.

Then, companies of the Fig. 3 (partial enlarged drawing of the position P1 shown in Fig. 2) to impeller housing 54 and recirculation pipe 84 is utilized The corrosion-resistant structure of knot point is illustrated.

As shown in figure 3, being formed with flange part 54e in the end of the guide part 54a of impeller housing 54 side of recirculation pipe 84.Flange The end face of the portion 54e side of recirculation pipe 84 is in the toroidal centered on axis X.Bowed in the end joined of the toroidal Depending on lower and flange part 54e same shapes laminal corrosion resistant component 57a.

Corrosion resistant component 57a is formed by intensity height and the metallic material with corrosion resistance.It is used as metallic material, example It such as can be used SUS317 that there is the stainless steel of corrosion resistance.Also, corrosion resistant component 57a consider its intensity and corrosion resistance and It is preferred that the thickness T1 along axis X direction is set into more than 5mm and below 10mm (for example, 9mm).

Corrosion resistant component 57a and flange part 54e engagement can use various joint methods, but preferably be connect by cold welding Close.Cold welding is by being coated on bonding part and being securely engaged part by certain time after mixed base agent and activating agent Mutual method.In cold welding, the change of volume is less before deposition and after deposition, therefore, it is possible to maintain the sealing of bonding part Property.Also, the corrosion resistant component 57a and flange part 54e being combined into one through cold welding can be machined simultaneously, so as to improve machinery The application property of processing.

Also, as shown in figure 3, it is formed with flange part 84a in the end of the side of impeller housing 54 of recirculation pipe 84.Flange part The end face of the 84a side of impeller housing 54 is in the toroidal centered on axis X.

As shown in figure 3, flange part 54e and flange part 84a is linked by fastening bolt 91 and clamp nut 92, and corrosion-resistant portion The state folder that part 57a is linked with flange part 54e and flange part 84a is configured between these components.

In addition, a pair of fastening bolts 91 and clamp nut 92 are illustrate only in Fig. 3, but recirculation pipe 84 and impeller housing 54 Linked by being arranged on the multipair fastening bolt 91 and clamp nut 92 of many places around axis X.

In the present embodiment, the corrosion resistant component 57a formed by intensity height and the metallic material with corrosion resistance Configuration is between flange part 54e and flange part 84a.Therefore, even if tight during clamp nut 92 because fastening bolt 91 is anchored on Though operation etc. be applied in excessive load, be also able to maintain that and flange part 54e protected from exhaust by corrosion resistant component 57a The state of influence.

Recirculation pipe 84 is the part that exhaust is guided to the suction inlet 54c of impeller housing 54.Therefore, in impeller housing 54 The opposed faces opposed with space S 1 of guide part 54a inner circumferential side have exhaust to be directed.In order to protect guide part 54a's and space Opposed S1 opposed faces and be formed with anti-corrosion layer 58a in the opposed faces, in order to avoid corroded by exhaust.

Anti-corrosion layer 58a preferably uses the coating for preventing gas permeation and being securely joined with metal impeller housing 54 Agent, the FUJI FLAKES for for example preferably using FUJI RESIN CO., LTD. (are mixed into the vinyl esters tree of glass flake Fat).

Anti-corrosion layer 58a thickness can suitably be set, for example, be preferably set in more than 1500 μm and less than 2000 μm of scope.

As described above, by engaging corrosion resistant component 57a in flange part 54e, it is ensured that flange part 54e corrosion resistance.And And, pass through the opposed faces formation anti-corrosion layer 58a opposed with space S 1 of the guide part 54a in impeller housing 54, it is ensured that be oriented to Portion 54a corrosion resistance.

Also, in the present embodiment, as shown in figure 3, flange part 54e and corrosion resistant component to cover guide part 54a The mode of the end of the side of space S 1 at 57a junction surface forms anti-corrosion layer 58a, to suppress corrosive substance intrusion junction surface.

By so setting, after the flange part 84a of flange part 54e and recirculation pipe 84 of impeller housing 54 is linked, without with The mode for covering these coupling positions forms anti-corrosion layer 58a, and is able to ensure that the corrosion resistance of coupling position.

Then, the link with reference to Fig. 4 (partial enlarged drawing of the position P2 shown in Fig. 2) to impeller housing 54 and seal box 55 Partial corrosion-resistant structure is illustrated.

As shown in figure 4, being formed with flange part 54f in the end of the housing section 54b of impeller housing 54 side of seal box 55.Flange part The end face of the 54f side of seal box 55 is in the toroidal centered on axis X.In the case where the end joined of the toroidal has a vertical view With the laminal corrosion resistant component 57b of flange part 54f same shapes.

Corrosion resistant component 57b material and thickness are identical with foregoing corrosion resistant component 57a.

Also, on the corrosion resistant component 57b joint method to flange part 54f, also with foregoing corrosion resistant component 57a phases Together.

As shown in figure 4, being formed with flange part 55d in the end of the side of impeller housing 54 of seal box 55.Flange part 55d leaf The end face of the side of housing 54 is taken turns in the toroidal centered on axis X.The toroidal end joined have vertical view under with it is convex The laminal corrosion resistant component 57c of edge 54f same shapes.

Corrosion resistant component 57c material and thickness are identical with foregoing corrosion resistant component 57c.

Also, on the corrosion resistant component 57c joint method to flange part 55d, also with foregoing corrosion resistant component 57a phases Together.

As shown in figure 4, flange part 54e and flange part 55d is linked by fastening bolt 93 and clamp nut 94, and corrosion resistant The state folder that erosion part 57a and corrosion resistant component 57c is linked with flange part 54f and flange part 55d is matched somebody with somebody between these components Put.

In addition, a pair of fastening bolts 93 and clamp nut 94 are illustrate only in Fig. 4, but seal box 55 leads to impeller housing 54 Cross and be arranged on the multipair fastening bolt 93 and clamp nut 94 of many places around axis X and link.

In the present embodiment, by intensity is high and metallic material of with corrosion resistance is formed corrosion resistant component 57b, 57c is configured between flange part 54f and flange part 55d.Therefore, even if during because fastening bolt 93 being anchored on into clamp nut 94 Tightening operation etc. and be applied in excessive load, be also able to maintain that by corrosion resistant component 57b protect flange part 54f from exhaust Influence state.Similarly, it is able to maintain that and flange part 55d is protected from the shape of the influence of exhaust by corrosion resistant component 57c State.

As shown in figure 4, the installation site of the dry gas seals part 55f in seal box 55, corrosion resistant component 57d by cold welding with Seal box 55 is engaged.Therefore, the dry gas seals part 55f of the seal box 55 opposed with space S 2 installation site part also turns into logical The state for the influence for crossing corrosion resistant component 57d to be protected against exhaust.

The space that space S 2 is vented for conveying.Therefore, impeller housing 54 housing section 54b inner circumferential side with space S 2 Opposed opposed faces have exhaust to be directed.In order to protective housing portion 54b the opposed faces opposed with space S 2 and in the opposed faces Anti-corrosion layer 58b is formed with, in order to avoid corroded by exhaust.Similarly, in order to protect the opposed with space S 2 opposed of seal box 55 Face and be formed with anti-corrosion layer 58c in the opposed faces, in order to avoid by exhaust corrode.

Anti-corrosion layer 58b preferably uses the coating for preventing gas permeation and being securely joined with metal impeller housing 54 Agent, for example, preferably use FUJI RESIN CO., LTD. FUJI FLAKES (vinyl ester resin for being mixed into glass flake) Deng.

Anti-corrosion layer 58b thickness can suitably be set, in the example shown in Figure 4, be set as and corrosion resistant component 57c identicals Thickness.Also, for example, it can also be set in more than 1500 μm and less than 2000 μm of scope.

As described above, by engaging corrosion resistant component 57b in flange part 54f, it is ensured that flange part 54f corrosion resistance.And And, pass through the opposed faces formation anti-corrosion layer 58b opposed with space S 2 of the housing section 54b in impeller housing 54, it is ensured that housing Portion 54b corrosion resistance.

Also, in the present embodiment, as shown in figure 4, flange part 54f and corrosion resistant component to cover housing section 54b The mode of the end of the side of space S 2 at 57b junction surface forms anti-corrosion layer 58b, to suppress corrosive substance intrusion junction surface.

By so setting, after the flange part 55d of flange part 54f and seal box 55 of impeller housing 54 is linked, without to cover The mode for covering these coupling positions forms anti-corrosion layer, and is able to ensure that the corrosion resistance of coupling position.

Similarly, by engaging corrosion resistant component 57c in flange part 55d, it is ensured that flange part 55d corrosion resistance.Also, Pass through the opposed opposed faces formation anti-corrosion layer 58c with space S 2 in seal box 55, it is ensured that the corrosion resistance of seal box 55.

Also, in the present embodiment, as shown in figure 4, flange part 55d and corrosion resistant component to cover seal box 55 The mode of the end of the side of space S 2 at 57c junction surface forms anti-corrosion layer 58c, to suppress corrosive substance intrusion junction surface.

By so setting, after the flange part 54f of flange part 55d and impeller housing 54 of seal box 55 is linked, without to cover The mode for covering these coupling positions forms anti-corrosion layer, and is able to ensure that the corrosion resistance of coupling position.

Then, with reference to companies of the Fig. 5 (partial enlarged drawing of the position P3 shown in Fig. 2) to impeller housing 54 and recirculation pipe 85 The corrosion-resistant structure of knot point is illustrated.

As shown in figure 5, being formed with flange part 54g in the end of the housing section 54b of impeller housing 54 side of recirculation pipe 85.Flange The end face of the portion 54g side of recirculation pipe 85 is in the toroidal centered on axis Y.Bowed in the end joined of the toroidal Depending on lower and flange part 54g same shapes laminal corrosion resistant component 57e.

Corrosion resistant component 57e material and thickness are identical with foregoing corrosion resistant component 57a.

Also, on the corrosion resistant component 57e joint method to flange part 54g, also with foregoing corrosion resistant component 57a phases Together.

As shown in figure 5, being formed with flange part 85a in the end of the side of impeller housing 54 of recirculation pipe 85.Flange part 85a's The end face of the side of impeller housing 54 is in the toroidal centered on axis Y.

As shown in figure 5, flange part 54g and flange part 85a is linked by fastening bolt 95 and clamp nut 96, and corrosion-resistant portion The state folder that part 57e is linked with flange part 54g and flange part 85a is configured between these components.

In addition, two pairs of fastening bolt 95 and clamp nut 96 is illustrate only in Fig. 5, recirculation pipe 85 and impeller housing 54 Linked by the multipair fastening bolt 95 and clamp nut 96 of many places being arranged on more than at 3 around axis X.

In the present embodiment, the corrosion resistant component 57e formed by intensity height and the metallic material with corrosion resistance Configuration is between flange part 54g and flange part 85a.Therefore, even if tight during clamp nut 96 because fastening bolt 95 is anchored on Though operation etc. be applied in excessive load, be also able to maintain that and flange part 54g protected from exhaust by corrosion resistant component 57e The state of influence.

Recirculation pipe 85 makes the portion of the passing away for being vented circulation from the outlet 54d discharges of impeller housing 54 to be formed Part.Therefore, exhaust is directed in the housing section 54b of impeller housing 54 opposed faces opposed with space S 3.For containment vessel The body portion 54b opposed faces opposed with space S 3 and be formed with anti-corrosion layer 58d in the opposed faces, in order to avoid by exhaust corrode.

Anti-corrosion layer 58d preferably uses the coating for preventing gas permeation and being securely joined with metal impeller housing 54 Agent, for example, preferably use FUJI RESIN CO., LTD. FUJI FLAKES (vinyl ester resin for being mixed into glass flake) Deng.

Anti-corrosion layer 58d thickness can suitably be set, for example, it is preferable to be set in the scope of more than 1500 μm and less than 2000 μm It is interior.

As described above, by engaging corrosion resistant component 57e in flange part 54g, it is ensured that flange part 54g corrosion resistance.And And, pass through the opposed faces formation anti-corrosion layer 58d opposed with space S 3 of the housing section 54b in impeller housing 54, it is ensured that housing Portion 54b corrosion resistance.

Also, in the present embodiment, as shown in figure 5, flange part 54g and corrosion resistant component to cover housing section 54b The mode of the end of the side of space S 3 at 57e junction surface forms anti-corrosion layer 58d, to suppress corrosive substance intrusion junction surface.

By so setting, after the flange part 85a of flange part 54g and recirculation pipe 85 of impeller housing 54 is linked, without with The mode for covering these coupling positions forms anti-corrosion layer 58d, and is able to ensure that the corrosion resistance of coupling position.

Then, the bearing portion 56 shown in Fig. 2 is said with reference to Fig. 6 (A-A of the bearing portion shown in Fig. 2 to sectional view) It is bright.

As shown in Fig. 2 bearing portion 56 is supporting drive shaft 53a, the vertical with the drive shaft 53a rotary shafts 52 linked and impeller 51 The load in direction and the bearing arrangement for rotating drive shaft 53a.

As shown in fig. 6, bearing portion 56 possesses the bearing cage part 56b linked with seal box 55, is disposed on the bearing in portion The holding member 56c and ball bearing 56a to be kept by bearing cage part 56b, 56c state clamped.

Ball bearing 56a inner ring is arranged on drive shaft 53a by shrink fit.Also, ball bearing 56a outer ring passes through The fastening bolt 97 clamped by bearing cage part 56b, 56c is fixed on seal box 55 to fasten.

As described above, drive motor 53 links with the state that seal box 55 is overlapped with axis X.Also, drive shaft 53a passes through Bearing portion 56 is supported in axis X.Therefore, drive shaft 53a and with rotary shaft 52 that it links in the way of being overlapped with axis X It is appropriately configured.

Then, the manufacture method to the centrifugal blower 50 of present embodiment is illustrated.

First, the 1st, impeller housing 54 and seal box 55 are manufactured by manufacturing processes such as castings.

2nd, the flange part 54e by cold welding in impeller housing 54 engages corrosion resistant component 57a, by cold welding in impeller housing 54 Flange part 54f engagement corrosion resistant component 57b, by cold welding impeller housing 54 flange part 54g engage corrosion resistant component 57e。

3rd, the flange part 55d by cold welding in seal box 55 engages corrosion resistant component 57c, by cold welding in dry gas seals part The engagement corrosion resistant component of seal box 55 57d of 55f installed position.

4th, in the guide part 54a of the impeller housing 54 opposed faces formation anti-corrosion layer 58a opposed with space S 1.This When, the shape in the way of covering the end of the side of space S 1 at guide part 54a flange part 54e and corrosion resistant component 57a junction surface Into anti-corrosion layer 58a.

5th, in the housing section 54b of the impeller housing 54 opposed faces formation anti-corrosion layer 58b opposed with space S 2.Now, with The mode of the end of the side of space S 2 at covering housing section 54b flange part 54f and corrosion resistant component 57b junction surface forms corrosion resistant Lose layer 58b.

6th, in the housing section 54b of the impeller housing 54 opposed faces formation anti-corrosion layer 58d opposed with space S 3.Now, with The mode of the end of the side of space S 3 at covering housing section 54b flange part 54g and corrosion resistant component 57e junction surface forms corrosion resistant Lose layer 58d.

7th, in the opposed faces formation anti-corrosion layer 58c opposed with space S 2 of seal box 55.Now, to cover seal box 55 with the end of the side of space S 2 at corrosion resistant component 57c junction surface and seal box 55 and corrosion resistant component 57d junction surface The mode of the end of the side of space S 2 forms anti-corrosion layer 58c.

8th, fasten the convex of the flange part 54e of impeller housing 54 and recirculation pipe 84 with fastening bolt 91 and clamp nut 92 Edge 84a.

9th, installed in seal box 55 after dry gas seals part 55f, impeller housing is fastened with fastening bolt 93 and clamp nut 94 The 54 flange part 54f and flange part 55d of seal box 55.

10th, drive motor 53 is installed in seal box 55.

In this way, producing the centrifugal blower 50 of present embodiment.

The functions and effects that the centrifugal blower 50 of present embodiment described above is played are illustrated.

According to the centrifugal blower 50 of present embodiment, the convex of the suction inlet 54c of metal impeller housing 54 is being formed at Edge 54e is bonded to corrosion resistant component 57a.Also, with the suction inlet 54c that is formed at impeller housing 54 flange part 54e and shape The state that the flange part 84a for the recirculation pipe 84 that Cheng Yuyu impeller housings 54 link links, configures corrosion-resistant portion between them Part 57a.

Therefore, the tightening operation when flange part 84a of the flange part 54e because of impeller housing 54 and recirculation pipe 84 links Deng and in the case of being applied in excessive load, also ensure that the flange part 54e engaged with corrosion resistant component 57a junction surface it is resistance to Corrosivity.

Also, it is formed with anti-corrosion layer 58a in the opposed faces of the impeller housing 54 opposed with the space S 1 of conveying exhaust.Should Anti-corrosion layer 58a in the way of covering the end of impeller housing 54 and the side of space S 1 at corrosion resistant component 57a junction surface to form.

Thereby it is ensured that the corrosion resistance of the opposed faces of impeller housing 54, and prevent corrosive substance from impeller housing 54 with it is resistance to The end intrusion junction surface of the side of space S 1 at corroded components 57a junction surface.

Also, according to the centrifugal blower 50 of present embodiment, it is being formed at the rotary shaft 52 of metal impeller housing 54 The flange part 54f of side is bonded to corrosion resistant component 57b.Also, with the flange part for the side of rotary shaft 52 for being formed at impeller housing 54 54f and be formed at impeller housing 54 link seal box 55 flange part 55d link state, corrosion resistant is configured between them Lose part 57b.

Therefore, tightening operation when the flange part 55d of the flange part 54f because of impeller housing 54 and seal box 55 links etc. And in the case of being applied in excessive load, also ensure that the corrosion resistant at the flange part 54f engaged with corrosion resistant component 57b junction surface Corrosion.

Also, it is formed with anti-corrosion layer 58b in the opposed faces of the impeller housing 54 opposed with the space S 2 of conveying exhaust.Should Anti-corrosion layer 58b in the way of covering the end of impeller housing 54 and the side of space S 2 at corrosion resistant component 57b junction surface to form.

Thereby it is ensured that the corrosion resistance of the opposed faces of impeller housing 54, and suppress corrosive substance from impeller housing 54 with it is resistance to The end intrusion junction surface of the side of space S 2 at corroded components 57b junction surface.

Also, according to the centrifugal blower 50 of present embodiment, connect in the flange part 55d for being formed at metal seal box 55 Conjunction has corrosion resistant component 57c.Also, to be formed at the flange part 55d of seal box 55 and be formed at the rotary shaft of impeller housing 54 The state that the flange part 54f of 52 sides links, configures corrosion resistant component 57c between them.

Therefore, tightening operation when the flange part 54f of the flange part 55d because of seal box 55 and impeller housing 54 links etc. And in the case of being applied in excessive load, also ensure that the corrosion resistant at the flange part 55d engaged with corrosion resistant component 57c junction surface Corrosion.

Also, it is formed with anti-corrosion layer 58c in the opposed faces of the seal box 55 opposed with the space S 2 of conveying exhaust.This is resistance to Corrosion layer 58c in the way of covering the end of seal box 55 and the side of space S 2 at corrosion resistant component 57c junction surface to form.

Thereby it is ensured that the corrosion resistance of the opposed faces of seal box 55, and suppress corrosive substance from seal box 55 with it is corrosion-resistant The end intrusion junction surface of the side of space S 2 at part 57c junction surface.

Also, in the centrifugal blower 5 of present embodiment, possess the opposed faces opposed with the space S 3 of conveying exhaust simultaneously And it is bonded to corrosion resistant in the flange part 54g for the outlet 54d for being formed at the metal impeller housing 54 linked with recirculation pipe 85 Lose part 57e.Also, the state linked with the flange part 85a of the flange part 54g of impeller housing 54 and recirculation pipe 85, at it Between configuration corrosion resistant component 57e.

Therefore, even in the flange part 54g and the flange part of recirculation pipe 85 of the outlet 54d because being formed at impeller housing 54 Tightening operation etc. when 85a links and in the case of being applied in excessive load, also ensure that engaged with corrosion resistant component 57e convex The corrosion resistance at edge 54g junction surface.

Also, it is formed with anti-corrosion layer 58d in the opposed faces of the impeller housing 54 opposed with the space S 3 of conveying exhaust.Should Anti-corrosion layer 58d in the way of covering the end of impeller housing 54 and the side of space S 3 at corrosion resistant component 57e junction surface to form.

Thereby it is ensured that the corrosion resistance of the opposed faces of impeller housing 54, and suppress corrosive substance from impeller housing 54 with it is resistance to The end intrusion junction surface of the side of space S 3 at corroded components 57e junction surface.

Symbol description

10- marine engines (internal combustion engine), 20- boosters, 50- centrifugal blowers (fluid machinery), 51- impellers, 52- rotations Rotating shaft, 53- drive motors, 53a- drive shafts, 54- impeller housings, 54a- guide parts, 54b- housing sections, 54c- suction inlets, 54d- Outlet, 54e- flange parts, 54f- flange parts, 54g- flange parts, 55- seal boxs, 55a- seal gas air inlets, 55b- connections Hole, 55d- flange parts, 55f- dry gas seals parts (sealing), 56- bearing portions, 56a- ball bearings, 56b, 56c- bearing cage Part, 57a, 57b, 57c, 57d, 57e- corrosion resistant component, 58a, 58b, 58c, 58d- anti-corrosion layer, 81,82,83- blast pipes, 84th, 85- recirculation pipes, 84a, 85a- flange part, 86- air inlet pipe, 91,93,95,97- fastening bolts, 92,94,96- fastening spiral shell Mother, 100- exhaust gas recycling systems, P1, P2, P3- position, S1, S2, S3, S4, S5- space.

Claims

1. a kind of fluid machinery, it possesses：

1st part, it forms the space of conveying corrosive gas and linked with the 2nd part；And

Corrosion resistant component, its state linked with the 1st part and the 2nd part configuration the 1st part with it is described Engaged between 2nd part and with the 1st part,

It is corrosion-resistant to be formed with the way of covering the space side at the 1st part and the junction surface of the corrosion resistant component Layer.

2. fluid machinery according to claim 1, it possesses：

Impeller, it rotates about the axis and blowed the corrosive gas flowed into from outside,

1st part draws the corrosive gas flowed into along the axis internally to accommodate the impeller and possessing The impeller housing of the suction inlet of inside is directed at,

2nd part is the 2nd flange part of the 1st flange part link to form and be formed at the suction inlet and inhaled to described Entrance guides the part of the corrosive gas,

The corrosion resistant component is engaged with the 1st flange part.

3. fluid machinery according to claim 1, it possesses：

Impeller, it rotates about the axis and blowed the corrosive gas flowed into from outside；And

Rotary shaft, it links with the impeller and around axis rotation,

1st part is the leaf for internally accommodating the impeller and possessing the 1st flange part for being formed at the rotation shaft side Take turns housing,

2nd part is to possess the 2nd flange part linked with the 1st flange part and configure in the periphery of the rotary shaft Face and suppress the corrosive gas in the impeller housing outflow sealing seal box,

The corrosion resistant component is engaged with the 1st flange part.

4. fluid machinery according to claim 1, it possesses：

Rotary shaft, it links with the impeller and around axis rotation,

2nd part is the leaf for internally accommodating the impeller and possessing the 2nd flange part for being formed at the rotation shaft side Take turns housing,

1st part is to possess the 1st flange part linked with the 2nd flange part and configure in the periphery of the rotary shaft Face and suppress the corrosive gas in the impeller housing outflow sealing seal box,

The corrosion resistant component is engaged with the 1st flange part.

5. fluid machinery according to claim 1, it possesses：

1st part draws the corrosive gas flowed into along the axis internally to accommodate the impeller and possessing The impeller housing of the outlet for the corrosive gas that the suction inlet and discharge for being directed inside are blowed by the impeller,

2nd part be to be formed and be formed at the outlet the 1st flange part link the 2nd flange part and formed make from The part of the passing away of the corrosive gas circulation of the outlet discharge,

The corrosion resistant component is engaged with the 1st flange part.

6. fluid machinery according to any one of claim 1 to 5, wherein,

The corrosive gas is the gas comprising nitrogen oxides or oxysulfide.

7. the fluid machinery according to any one of claim 2 to 6, wherein,

The corrosion resistant component is engaged by cold welding with the 1st part.

8. a kind of manufacture method of fluid machinery, it possesses：

Form the space of conveying corrosive gas and engage corrosion resistant component with the part of metal system the 1st that the 2nd part links Bonding process；

The 1st part and the 2nd part are connected in the way of configuring the corrosion resistant component between the 2nd part The process of knot；And

Anti-corrosion layer is formed in the way of covering the space side at junction surface of the 1st part and the corrosion resistant component Process.