CN204386947U

CN204386947U - Turbomachinery

Info

Publication number: CN204386947U
Application number: CN201420797424.0U
Authority: CN
Inventors: 木村臣吾; 成田光裕; 胡涛
Original assignee: Hitachi Ltd
Current assignee: Hitachi Industrial Products Ltd
Priority date: 2013-12-19
Filing date: 2014-12-16
Publication date: 2015-06-10
Anticipated expiration: 2024-12-16

Abstract

The utility model provides a kind of turbomachinery, makes to be easy to carry out to the replacing of the sealing component that the embedding part of the shell in turbomachinery and end cap flange seals.Centrifugal compressor as turbomachinery possesses fixed component (4), and this fixed component has the supporting surface (41) and the inner peripheral surface (42) chimeric with the little diametric plane (33) of the end difference (31) of end cap flange (3) that are namely abutted by bearing surface with the end face outside the axle direction being arranged in protuberance (11) in shell (1).In addition, centrifugal compressor (10) possesses: to shell (1) by seal between bearing surface (15) and the supporting surface (41) of fixed component (4) the first sealing component (51), to the second sealing component (52) sealed between the little diametric plane (33) of end difference (31) and the inner peripheral surface (42) of fixed component (4) and fixed component (4) is pressed against shell (1) by the bolt component of bearing surface (15) (71).

Description

Turbomachinery

Technical field

The utility model relates to the turbomachinery such as pump, compressor.

Background technique

As the background technique of turbomachinery, in patent documentation 1, record the example of the centrifugal compressor of an axle multi-stage type.The centrifugal compressor recorded in patent documentation 1 possesses: the volume type housing (shell) 1 of drum, there is running shaft 22 and be arranged on the impeller 21 on this running shaft 22 solid of rotation, be embedded in shell 1 radially inner side and formed between solid of rotation the stream of working fluid inner casing 23, be configured in the end cap flange of the axial end side of inner casing 23 and be configured in the end cap cover 2 of another side axial of inner casing 23.

At first technical paper

Patent documentation

Patent documentation 1: Japanese Unexamined Patent Publication 2010-255459 publication

The centrifugal compressor recorded in patent documentation 1 is formed as, and after loading end cap flange in axial direction, is loaded by solid of rotation, then by the structure that end cap cover 2 covers together with inner casing 23 relative to shell 1.At this, limited the movement in end cap cover 2 axially outside by public key 5a, 5b.

Fig. 5 is the local wide sectional view of the sealing configuration of the embedding part representing shell 1 in the past and end cap flange 3.As shown in Figure 5, outside the axle direction of the outer circumferential face of end cap flange 3, be formed with end difference 31, this end difference 31 has the side and the little diametric plane chimeric with the inner peripheral surface of protuberance 11 that abut with the end face inside the axle direction of the protuberance 11 formed on the inner peripheral surface of shell 1.End cap flange 3 abuts with the protuberance 11 of shell 1, thus axially the movement in outside is limited.And be provided with the sealing components 50 such as O type circle in the circular groove that the little diametric plane of end difference 31 is formed, thus, the embedding part of shell 1 and end cap flange 3 is sealed, in case pressurized gas externally leak.

In the case, sealing component 50 unavoidably aging, in order to maintain good sealing, needs to change aperiodically termly or according to situation.Now, have to decompose compressor, after extracting end cap cover out from axle direction and including the inner casing of solid of rotation, extract end cap flange 3 out, change the sealing component 50 be arranged on end cap flange 3.Therefore, replacement operation needs cost and time.

Model utility content

The problem that model utility will solve

The utility model is made in view of the problem of above-mentioned prior art, its objective is and makes the replacing to the sealing component that the embedding part of the shell in turbomachinery and end cap flange seals be easy to carry out.

For solving the means of problem

To achieve these goals, turbomachinery of the present utility model possesses: the shell of drum, and this shell has protuberance that is outstanding inside radial direction and the ring-type formed on the inner peripheral surface of axial end side; Solid of rotation, this solid of rotation has running shaft and is arranged on the impeller on this running shaft; Inner casing, this inner casing is embedded in the radially inner side of above-mentioned shell and between itself and above-mentioned solid of rotation, forms the stream of working fluid; End cap flange, described end cap flange is configured in the axial end side of described inner casing, is formed with the end difference with side and the little diametric plane chimeric with the inner peripheral surface of described protuberance abutted with the end face inside the axle direction of described protuberance outside the axle direction of outer circumferential face; End cap cover, described end cap cover is configured in another side axial of described inner casing; Fixed component, described fixed component has and the end face outside the axle direction being arranged in described protuberance in described shell, the supporting surface namely abutted by bearing surface and the inner peripheral surface chimeric with the described little diametric plane of the described end difference of described end cap flange; First sealing component, described first sealing component is sealed by between bearing surface and the described supporting surface of described fixed component the described of described shell; Second sealing component, described second sealing component seals between the described little diametric plane of described end difference and the described inner peripheral surface of described fixed component; And be pressed against component, described in be pressed against component described fixed component be pressed against the described by bearing surface of described shell.

The effect of model utility

According to the utility model, can make to be easy to carry out to the replacing of the sealing component that the embedding part of the shell in turbomachinery and end cap flange seals.

Accompanying drawing explanation

Fig. 1 is the outline longitudinal sectional view of the centrifugal compressor of the mode of execution representing turbomachinery of the present utility model.

Fig. 2 is the enlarged view in the A portion shown in Fig. 1.

Fig. 3 is the side view observed from the driving pusher side of Fig. 1.

Fig. 4 is the view sub-anatomy of the replacement operation for illustration of the first sealing component and the second sealing component.

Fig. 5 is the local wide sectional view of the sealing configuration of the embedding part representing existing shell and end cap flange.

The explanation of reference character

1 shell; 2 end cap covers; 3 end cap flanges; 4 fixed components; 6 second fixed components; 10 centrifugal compressors; 11 protuberances; 12 inner peripheral surfaces; 13 end faces; 14 inner peripheral surfaces; 15 by bearing surface; 20 solid of rotation; 21 impellers; 22 running shafts; 23 inner casings; 31 end differences; 32 sides; 33 little diametric planes; 34 end faces; 35 outer circumferential faces; 41 supporting surfaces; 42 inner peripheral surfaces; 43 end faces; 51 first sealing components; 52 second sealing components; 53 first grooves; 54 second grooves; 61 opposing sides; 71 bolt components (being pressed against component); 72 bolt components (second is pressed against component).

Embodiment

With reference to suitable accompanying drawing, explain mode of execution of the present utility model.

In addition, in accompanying drawing shown below, same component or the same reference character of equivalent element numeral, suitably the repetitive description thereof will be omitted.In addition, for convenience of explanation, sometimes the size and dimension of component is out of shape or exaggerates medelling and represent.

Fig. 1 is the outline longitudinal sectional view of the centrifugal compressor 10 of the mode of execution representing turbomachinery of the present utility model.Fig. 2 is the enlarged view in the A portion shown in Fig. 1.Fig. 3 is the side view observed from the driving pusher side of Fig. 1.In addition, in figure 3, each nozzle representing and form suction port 18 and exhaust port 19 (with reference to Fig. 1) is omitted.

As shown in Figure 1, the centrifugal compressor 10 of a mode of execution of turbomachinery of the present utility model is the centrifugal compressor of an axle multi-stage type.Centrifugal compressor 10 possesses: the shell 1 of drum, the solid of rotation 20 that there is running shaft 22 and be arranged on the impeller 21 on this running shaft 22, be embedded in shell 1 radially inner side and the inner casing 23 forming the stream of working gas (fluid) between solid of rotation, the axle direction end side that is configured in inner casing 23 namely drive the end cap flange 3 of pusher side and be configured in another side of axle direction of inner casing 23 and the end cap cover 2 of driving machine opposition side.In addition, end cap cover 2 is also sometimes referred to as end cap flange.

Inner casing 23 possesses the part splitting shape for a pair, covers, and be bolted and combine in the mode of this pair part sandwich relative from radial direction relative to solid of rotation 20.Impeller 21 is fixed on running shaft 22 by hot jacket etc.The magnitude setting of impeller 21 in this case 4 grades, but be not limited thereto also can be 1 grade, also can be multistage beyond 4 grades.The end of end cap flange 3 side of running shaft 22 is connected to the driving machines such as motor (not shown) via coupling (not shown).

Centrifugal compressor 10 is formed as, and after axially loading end cap flange 3, loads the inner casing 23 including solid of rotation 20, then by the structure that end cap cover 2 covers relative to shell 1.That is, inner casing 23 is axially encased in shell 1 together with solid of rotation 20, thus the end of the axial at least one party of shell 1 is formed as open end.After this open end loading end cap cover 2 covers, use public key (シェアキー) 25 fixed end housings 2 thus sealing open end at this.

Public key 25 is configured to be arranged side by side the key component possessing multiple components that ring bodies separates in a circumferential direction for a pair in axial inner side and outer side, by public key 25 limit end cap cover 2 axially outside movement.In addition, the structure of fixed end housing 2 is not limited to the structure using public key 25, also can adopt and such as end cap cover 2 is bolted to the structure on shell 1.

In addition, centrifugal compressor 10 possesses the suction port 18 of suction gas and discharges by the exhaust port 19 of the gas that have compressed.Form each nozzle of suction port 18 and exhaust port 19 respectively by the outer circumferential face of welding joint at shell 1.

As shown in Figure 2, shell 1 drives the inner peripheral surface 12 of pusher side (with reference to Fig. 1) has outstanding inside radial direction and the protuberance 11 of ring-type that is that form in axial end side, namely.On the other hand, outside the axle direction of the outer circumferential face 35 of end cap flange 3, namely drive pusher side, form end difference 31, this end difference 31 has the side 32 and the little diametric plane 33 chimeric with the inner peripheral surface 14 of protuberance 11 that abut with the end face 13 inside the axle direction of the protuberance 11 in shell 1.The side 32 of end difference 31 abuts with the end face 13 inside the axle direction of the protuberance 11 of shell 1, thus the movement in restriction end cap flange 3 axially outside.

Centrifugal compressor 10 possesses fixed component 4, and this fixed component 4 has and the end face outside the axle direction being arranged in protuberance 11 in shell 1, the supporting surface 41 namely abutted by bearing surface 15 and the inner peripheral surface 42 chimeric with the little diametric plane 33 of the end difference 31 of end cap flange 3.

In addition, little diametric plane 33 also in the mode of chimeric the second little diametric plane of the inner peripheral surface 42 possessing the first little diametric plane chimeric with the inner peripheral surface 14 of protuberance 11 and the fixed component 4 less than this first little diametric plane with external diameter, can be formed as the structure with step.

As shown in Figures 2 and 3, fixed component 4 is rendered as toroidal, at shell 1 by bearing surface 15, be connected by being screwed into as the bolt component 71 being pressed against component and being pressed against.In addition, fixed component 4, by bearing surface 15, structure is pressed against to shell 1, be not limited to above-mentioned bolt fastening structure, can adopt such as by clamping components in axial direction to the structure that the end face 43 outside a part for shell 1 and the axle direction of fixed component 4 clamps.

In addition, centrifugal compressor 10 possesses: to shell 1 by the first sealing components 51 such as the O type circles that seals between bearing surface 15 and the supporting surface 41 of fixed component 4 with to the second sealing components 52 such as the O type circles sealed between the little diametric plane 33 of end difference 31 and the inner peripheral surface 42 of fixed component 4.In addition, the magnitude setting of the first sealing component 51 and the second sealing component 52 is 1 in fig. 2, but is the situation etc. of high pressure at working gas, also can be multiple.

First sealing component 51 be installed in shell 1 by the first groove 53 of ring-type that bearing surface 15 is formed, in the second groove 54 of the ring-type that the little diametric plane 33 that the second sealing component 52 is installed in end difference 31 is formed.But, the first sealing component 51 also can be installed in the groove of the ring-type that the supporting surface 41 of fixed component 4 is formed.In addition, the second sealing component 52 also can be installed in the groove of the ring-type that the inner peripheral surface 42 of fixed component 4 is formed.Further, the Sealing of sheet also can be used as the first sealing component 51, in the case, omit the formation of the first groove 53 of ring-type.

In the second groove 54, guard circle 55 is installed.Thereby, it is possible to prevent the second sealing component 52 from stretching out from the second groove 54 effectively.But, can omit and guard circle 55 is set.

In addition, centrifugal compressor 10 possesses the second fixed component 6, and this second fixed component 6 has the opposing side 61 relative with both the end faces 43 outside the axle direction of the end face 34 outside the axle direction of end cap flange 3 and fixed component 4.

Second fixed component 6 is rendered as toroidal, on the end face 34 outside the axle direction of end cap flange 3, is pressed against the bolt component 72 of component by being screwed into and being connected and being pressed against as second.Length L1 on the axle direction of fixed component 4 is set to, when the end face 13 of the protuberance 11 of shell 1 contacts with the side 32 of the end difference 31 of end cap flange 3, and shell 1 is roughly equal by the axial distance L2 between the end face 34 outside the axle direction of bearing surface 15 and end cap flange 3.

Next, the effect of the centrifugal compressor 10 of such structure is described.

When centrifugal compressor 10 entry into service, by the work of driving machine (not shown), running shaft 22 is rotated by driving.Then, centrifugal compressor 10, from suction port 18 suction gas, carrys out pressurized gas by the rotation of the impeller 21 of solid of rotation 20, and discharges by the gas that have compressed from exhaust port 19.

Now, being sealed by the first sealing component 51 by the leakage stream of the gas to radial outside between bearing surface 15 and the supporting surface 41 of fixed component 4, i.e. in the embedding part of shell 1 and end cap flange 3 at shell 1.In addition, the leakage stream of the axially gas in outside between the little diametric plane 33 and the inner peripheral surface 42 of fixed component 4 of end difference 31, i.e. in the embedding part of shell 1 and end cap flange 3 is sealed by the second sealing component 52.Thus, the embedding part of shell 1 and end cap flange 3 is sealed as a whole effectively, thus the pressurized gas after compression can not externally leak.

On the other hand, in order to maintain the good sealing of the first sealing component 51 and the second sealing component 52, the operation changing these components is carried out as follows.Fig. 4 is the view sub-anatomy of the replacement operation for illustration of the first sealing component 51 and the second sealing component 52.

As shown in Figure 4, when replacing first sealing component 51 and the second sealing component 52, first, unthread bolts component 72, removes the second fixed component 6 from the end face 34 outside the axle direction of end cap flange 3.Next, unthread bolts component 71, fixed component 4 being removed by bearing surface 15 from shell 1.Thus, the first sealing component 51 be arranged in the first groove 53 can be made to be exposed to outside with the second sealing component 52 be arranged in the second groove 54, thus the first sealing component 51 and the second sealing component 52 can be changed.

In the past, the replacing being arranged on the sealing component on end cap flange 3 is (with reference to Fig. 5) of having to could implement after axial driving machine opposition side (with reference to Fig. 1) extracts end cap cover 2, the inner casing 23 including solid of rotation 20 and end cap flange 3 successively out from shell 1.Therefore, the replacement operation of sealing component needs cost and time, and in the present embodiment, can eliminate this miscellaneous operation.

As mentioned above, the centrifugal compressor 10 of present embodiment possesses fixed component 4, and this fixed component 4 has and the end face outside the axle direction being arranged in protuberance 11 in shell 1, the supporting surface 41 namely abutted by bearing surface 15 and the inner peripheral surface 42 chimeric with the little diametric plane 33 of the end difference 31 of end cap flange 3.In addition, centrifugal compressor 10 possesses: to shell 1 by seal between bearing surface 15 and the supporting surface 41 of fixed component 4 the first sealing component 51, to the second sealing component 52 sealed between the little diametric plane 33 of end difference 31 and the inner peripheral surface 42 of fixed component 4 and fixed component 4 is pressed against shell 1 by the bolt component 71 on bearing surface 15.

Therefore, according to the present embodiment, can be easy to carry out to the replacing of the sealing component 51,52 that the embedding part as the shell 1 in the centrifugal compressor 10 of turbomachinery and end cap flange 3 seals.

In addition, in the present embodiment, the first sealing component 51 be arranged on shell 1 by the first groove 53 of ring-type that bearing surface 15 is formed, in the second groove 54 of the ring-type that the little diametric plane 33 that the second sealing component 52 is arranged on end difference 31 is formed.According to such structure, when assembling centrifugal compressor 10, sealing component 51,52 not easily comes off from groove 53,54, thus improves assembly manipulation.

In addition, in the present embodiment, also possess: the bolt component 72 on the end face 34 outside second fixed component 6 with the opposing side 61 relative with both the end faces 43 outside the axle direction of the end face 34 outside the axle direction of end cap flange 3 and fixed component 4 and the axle direction the second fixed component 6 being pressed against end cap flange 3.According to such structure, assemble centrifugal compressor 10 time, such as inside vacuumizes the non-runnings such as test time, end cap flange 3 axially medial movement can be limited.

Above, describe the utility model based on mode of execution, but the utility model is not limited to above-mentioned mode of execution, but comprises various variation.Such as, above-mentioned mode of execution has been described in detail for ease of the utility model being described with understanding, and is not necessarily defined in all structures possessing explanation.In addition, can add, eliminate, replace other structure to a part for the structure of above-mentioned mode of execution.

Such as, be that centrifugal compressor 10 is illustrated in the above-described embodiment, but the present invention is not limited thereto, also can be applicable to other the turbomachinery such as such as pump.

Claims

1. a turbomachinery, is characterized in that,

Described turbomachinery possesses:

The shell of drum, described shell has protuberance that is outstanding inside radial direction and the ring-type formed on the inner peripheral surface of axial end side;

Solid of rotation, described solid of rotation has running shaft and is arranged on the impeller on this running shaft;

Inner casing, described inner casing is embedded in the radially inner side of described shell, and forms the stream of working fluid between described solid of rotation;

End cap flange, described end cap flange is configured in the axial end side of described inner casing, is formed with the end difference with side and the little diametric plane chimeric with the inner peripheral surface of described protuberance abutted with the end face inside the axle direction of described protuberance outside the axle direction of outer circumferential face;

End cap cover, described end cap cover is configured in another side axial of described inner casing;

Fixed component, described fixed component has and the end face outside the axle direction being arranged in described protuberance in described shell, the supporting surface namely abutted by bearing surface and the inner peripheral surface chimeric with the described little diametric plane of the described end difference of described end cap flange;

First sealing component, described first sealing component is sealed by between bearing surface and the described supporting surface of described fixed component the described of described shell;

Second sealing component, described second sealing component seals between the described little diametric plane of described end difference and the described inner peripheral surface of described fixed component; And

Be pressed against component, described in be pressed against component described fixed component be pressed against the described by bearing surface of described shell.

2. turbomachinery according to claim 1, is characterized in that,

Described first sealing component is installed in and is formed at the described by the first groove of the ring-type of bearing surface of described shell, and described second sealing component is installed in the second groove of the ring-type of the described little diametric plane being formed at described end difference.

3. turbomachinery according to claim 1 and 2, is characterized in that,

This turbomachinery also possesses:

Second fixed component, described second fixed component has the opposing side relative with the end face outside the axle direction of the end face outside the axle direction of described end cap flange and described fixed component; And

Second is pressed against component, and described second is pressed against the described end face outside axle direction that described second fixed component is pressed against described end cap flange by component.