CN204783801U - High speed motor's centrifugal compressor's axial footstep bearing structure - Google Patents
High speed motor's centrifugal compressor's axial footstep bearing structure Download PDFInfo
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- CN204783801U CN204783801U CN201520448927.1U CN201520448927U CN204783801U CN 204783801 U CN204783801 U CN 204783801U CN 201520448927 U CN201520448927 U CN 201520448927U CN 204783801 U CN204783801 U CN 204783801U
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Abstract
The utility model relates to a mill as the power supply and for the raw materials compressor or the air -blower of air supply to adopting axial thrust bearing to shorten an improvement structure of rotor length. A high speed motor's centrifugal compressor's axial footstep bearing structure which characterized in that: by the back configuration axial thrust bearing who lives the impeller. Further characterized in that air enclosed with axial thrust bearing links together. Including a plurality of air enclosed with axial thrust bearing's concrete configuration structure. Changed prior art fixed round steel sheet ring that stretches out in the pivot of rotor, in the both sides of steel sheet ring configuration axial thrust bearing's structure, changeed that epaxial configuration can be simplified, the compactness, the contraction in length, the ability reinforcing that intrinsically can bear the rotational speed improves the compressor rotational speed, improves the delivery pressure and the power of compressor.
Description
Technical field
The utility model relates in factory as power source and the compressor of raw material source of the gas or the structure-improved of blower, specifically to the improvement of the centrifugal compressor or blower parts that directly adopt high-speed electric expreess locomotive driving, to a kind of structure-improved adopting axial thrust bearing to shorten rotor length.
Background technique
The utility model relates in factory as power source or the compressor of raw material source of the gas or the structure-improved of blower, this type of compressor components quantity is reduced to the limit, do not adopt traditional gear speed increasing mechanism, and the centrifugal compressor directly adopting high-speed electric expreess locomotive to drive or blower.
The impeller of centrifugal compressor or blower is as can not be just can not fully done work performance efficiency by High Rotation Speed, and therefore, impeller High Rotation Speed is very important, generally adopts gear increaser speedup in the past.
Recently, owing to developing high-speed electric expreess locomotive, do not use worm gear booster engine, the utility model relates to directly by the sophisticated technology of high-speed electric expreess locomotive drives impeller, is applied to the field of high-speed electric expreess locomotive centrifugal compressor or blower.
Prior art, in the process that centrifugal compressor adjusts in frequency conversion, along with the increase of power, outlet pressure increases gradually, and above impeller, outlet pressure raises and forms zone of high pressure, and impeller back rear pressure is lower simultaneously.Such blade will give one, axle center axial force backward, and increases along with the increase of frequency conversion.For this reason, axial thrust bearing is set at the back of impeller.
The high temperature compressed air (100-170 DEG C) leaked out at the back side of compressor impeller can to radial bearing heating, when the heat resisting temperature exceeding radial bearing can cause adverse consequences, in order to avoid unfavorable condition occurs, distance on rotor between radial bearing and impeller must strengthen, the length of such rotor structure will be longer, Stiffness.
Prior art has configuration structure like multiple types.
Such as shown in Figure 6, front is compressor impeller and spiral case, and spiral case is fixed on the housing of compressor.Reverse side is for being fixedly connected with the rotating shaft of compressor impeller in the spiral case of compressor, and rotating shaft connects the rotor of high-speed electric expreess locomotive through pneumatic bearing.The housing cavity being wrapped in rotating shaft outside is formed by three sections, near the first paragraph embedding sealing circle of impeller, second segment is idle loop chamber, axial thrust bearing group is configured in idle loop chamber, described axial thrust bearing group forms by having clamped the steel plate ring that a circle is fixed in rotating shaft in the middle of two axial thrust bearings, and the 3rd section is the dependence supporting section on rear side of idle loop chamber.
The structure of another kind of prior art, as shown in Figure 7, at the back of impeller configuration aeroseal, in rotating shaft, then fix a circle or two circle steel plate rings, at the one or both sides of steel plate ring configuration axial thrust bearing, described axial thrust bearing is fixed on outside compressor case.
Equally, the back that several schemes of prior art are close to impeller is all configuration aeroseal, configures by the anti-axial motion mechanism having clamped a circle or the two circles steel plate ring be fixed in rotating shaft in the middle of two pieces of axial thrust bearings and form between aeroseal and pneumatic bearing.
It is long that structure like this causes the rotating shaft of rotor to be positioned at the length of housing bound fraction, the shaft length of compressor drum is long makes rotation there will be vibration, fluctuation, the critical speed of rotation that rotor can bear declines, cannot run up, thus the enough delivery pressures of compressor cannot be obtained, place restrictions on the performance of compressor horsepower.
Model utility content
Problem to be solved in the utility model is, the rotating shaft configuration structure of axial thrust bearing compressor drum is adopted for prior art, can not rotate with higher speed, sufficient pressure can not be exported, more high-power defect can not be played, provide high-speed electric expreess locomotive centrifugal compressor to adopt cod can shorten a kind of structure of rotor length.
The purpose of this utility model is realized by following technological scheme:
An axial thrust bearing structure for the centrifugal compressor of high-speed electric expreess locomotive, is characterized in that: the back configuration axial thrust bearing being close to impeller.
Adopt technical solutions of the utility model, related domain proposes first does not fixedly stretch out a circle steel plate ring in the rotating shaft of rotor, not in the structure of the both sides of steel plate ring configuration axial thrust bearing, the back configuration axial thrust bearing being close to impeller is proposed first, the structure of compressor drum part is made to become very compact, shorten the length of rotor shaft, the rotational speed of rotor can be improved.
Further, aeroseal and described axial thrust bearing link together.
Adopt the technical program, aeroseal is connected with described axial thrust bearing and fits together, and one-tenth is integrated, and reaches existing requisite hermetic unit configuration, make again aeroseal not occupy special axial position in addition, do not cause the disadvantage of special elongated rotor shaft length.
The beneficial effects of the utility model:
The utility model changes prior art in the rotating shaft of rotor, fixedly stretches out a circle steel plate ring, in the structure of the both sides of steel plate ring configuration axial thrust bearing, proposes the technological scheme of the back configuration axial thrust bearing being close to impeller first in related domain.The turning shaft structure change of rotor, the configuration in rotating shaft can simplify, compact, and shaft length also can shorten, and the intrinsic ability can bearing rotating speed of rotating shaft is strengthened, can improve compressor rotary speed, improve delivery pressure and the power of compressor in actual motion.
The utility model changes allocation position and the mode of axial thrust bearing in the past completely, shortens shaft length, and improve rotor speed, the utility model has significant creativeness, superiority and use value.Compressor is the work mechanism that a kind of application very extensively provides power source, improves the superior effect produced bring very large benefit by the industry of various use and enterprise to it.
Accompanying drawing explanation
Fig. 1 be the axial thrust bearing structure of the centrifugal compressor of the utility model high-speed electric expreess locomotive a kind of mode of execution, display is close to impeller back and arranges axial thrust bearing, the structure of the supporting section inner ring fixed air sealing at rear portion;
Fig. 2 is the another kind of structural representation of the utility model, and show and be close to impeller back configuration axial thrust bearing, rear portion is supporting section; It is integral that aeroseal is fixed on axial thrust bearing inner ring, and air impervious sealing surface is inner ring;
Fig. 3 is the utility model another structural representation existing, and show and be close to impeller back configuration axial thrust bearing, rear portion is supporting section; It is integral that aeroseal is fixed on axial thrust bearing inner ring, and aeroseal has two sealing surfaces, and except inner ring and shaft contacts seal, another sealing surface is that side and impeller back contact seal;
Fig. 4 is another structural representation of the utility model, and show and be close to impeller back configuration axial thrust bearing, rear portion is supporting section; It is integral that aeroseal is fixed on axial thrust bearing outer ring, and sealing surface is that side and impeller back contact seal;
Fig. 5 is that the utility model has a kind of structural representation again, and show and be close to impeller back configuration axial thrust bearing, rear portion is supporting section; Described aeroseal is two, be separately fixed at axial thrust bearing inner ring and outer ring integral, an aeroseal is fixed on axial thrust bearing outer ring, and sealing surface is that side and impeller back contact seal; Another is fixed on the inner ring of axial thrust bearing, and sealing surface is that inner ring and shaft contacts seal;
Fig. 6 is that a kind of prior art drives the structure sectional view of compressor at impeller position by high-speed electric expreess locomotive, and show aeroseal and be configured in impeller back, housing is axially three stage structure;
Fig. 7 is that another kind of prior art drives the structure sectional view of compressor by high-speed electric expreess locomotive.
In figure: 1 be locking nut, 2 are impellers, 3 are spiral cases, 4 are Diffusers, 5 are housings, 6 are axial thrust bearings, 7 are aeroseals, 8 are pneumatic bearing, 9 are high-speed electric expreess locomotives, 10 are rotors, 11 is rotating shafts.
Embodiment
Structure of the present utility model is further described below in conjunction with accompanying drawing.
Embodiment 1, a kind of axial thrust bearing structure of centrifugal compressor of high-speed electric expreess locomotive, is close to the back configuration axial thrust bearing 6 of impeller 2.Configuration structure like this is compact especially, need not fixedly stretch out a circle steel plate ring again, then be held in steel plate ring both sides by two pieces of axial thrust bearing therebetween and form in rotating shaft 11, shortens the length of rotating shaft 11.
Embodiment 2, and be close to the back configuration axial thrust bearing 6 of impeller 2, aeroseal 7 and described axial thrust bearing 6 are joined together to form integrative-structure.Configuration like this, is also a kind of obviously compact configuration, fixing, linkage structure form compared with prior art, plays the object shortening rotating shaft 11, rotor length equally.
Embodiment 3, a kind of axial thrust bearing structure of centrifugal compressor of high-speed electric expreess locomotive, and compressor impeller 2 is configured in spiral case 3, and spiral case 3 is fixed on the housing 5 of compressor, and housing 5 central part is stretched in the rotating shaft 11 of fixing impeller 2:
Be close to the back configuration axial thrust bearing 6 of impeller 2, corresponding housing 5 is offered one section of groove, the rear portion of groove is supporting section; The inner ring fixed air sealing 7 of described supporting section, aeroseal 7 sealing surface contacts with rotating shaft 11 and seals.This axis of no-feathering axial thrust bearing 6 can bear the axial pressure of impeller, rear portion has again back support section to rely on, supports, utilize the space of supporting section inner ring simultaneously, in inner ring configuration fixed air sealing 7, contact with rotating shaft 11 and seal, block the adverse effect that the high temperature compressed air that leaks out from the back side of compressor impeller heats rotor both sides radial bearing, in addition, utilize the space of supporting section inner ring, the length of rotating shaft 11 need not be increased again.
Embodiment 4, a kind of axial thrust bearing structure of centrifugal compressor of high-speed electric expreess locomotive, compressor impeller 2 is configured in spiral case 3, spiral case 3 is fixed on the housing 5 of compressor, housing 5 central part is stretched in the rotating shaft 11 of fixing impeller 2, be close to the back configuration axial thrust bearing 6 of impeller 2, corresponding housing 5 is offered one section of groove, the rear portion of groove is supporting section; Structure thus, the axial force of impeller 2 obtains dependence, the support of axial thrust bearing 6 and back support section.
In addition, leak out as isolation impeller 2 back the inner ring that hot air to the aeroseal 7 of radial air bearing 8 path is fixed on axial thrust bearing 6, the sealing surface of described aeroseal 7 is inner ring, contacts seal with rotating shaft 11;
Embodiment 5, and compressor impeller 2 is configured in spiral case 3, and spiral case 3 is fixed on the housing 5 of compressor, housing 5 central part is stretched in the rotating shaft 11 of fixing impeller 2, be close to the back configuration axial thrust bearing 6 of impeller 2, corresponding housing 5 is offered one section of groove, the rear portion of groove is supporting section; Structure thus, the axial force of impeller 2 obtains dependence, the support of axial thrust bearing 6 and back support section.
In addition, leaking out hot air to the aeroseal 7 of radial air bearing 8 path as isolation impeller 2 back has two sealing surfaces, and sealing surface is that inner ring contacts with rotating shaft 11 and seals, and another sealing surface is that side and impeller 2 back contact seal;
Embodiment 6, and compressor impeller 2 is configured in spiral case 3, and spiral case 3 is fixed on the housing 5 of compressor, housing 5 central part is stretched in the rotating shaft 11 of fixing impeller 2, be close to the back configuration axial thrust bearing 6 of impeller 2, corresponding housing 5 is offered one section of groove, the rear portion of groove is supporting section.
In addition, leak out as isolation impeller 2 back the outer ring that hot air to the aeroseal 7 of radial air bearing 8 path is fixed on axial thrust bearing 6, the side of described aeroseal 7 is sealing surface, seals with impeller 2 back contact;
Embodiment 7, and compressor impeller 2 is configured in spiral case 3, and spiral case 3 is fixed on the housing 5 of compressor, housing 5 central part is stretched in the rotating shaft 11 of fixing impeller 2, be close to the back configuration axial thrust bearing 6 of impeller 2, corresponding housing 5 is offered one section of groove, the rear portion of groove is supporting section.
In addition, leaking out hot air to the aeroseal 7 of radial air bearing 8 path as isolation impeller 2 back is two, and an aeroseal 7 is fixed on the outer ring of axial thrust bearing 6, and sealing surface is that side and impeller 2 back contact seal; Another is fixed on the inner ring of axial thrust bearing 6, and sealing surface is inner ring, contacts seal with rotating shaft 11.
In above embodiment 4,5,6,7, the axial force of impeller 2 obtains dependence, the support of axial thrust bearing 6 and back support section.The configuration mode of four kinds of aeroseals 7, all link into an integrated entity with axial thrust bearing 6, make use of the space of axial thrust bearing 6 inner ring, outer ring and inside and outside circle, neither additionally increase space, lengthen the length of rotating shaft 11, provide again necessary seal action and function closely.
Claims (2)
1. an axial thrust bearing structure for the centrifugal compressor of high-speed electric expreess locomotive, is characterized in that: the back configuration axial thrust bearing being close to impeller.
2. the axial thrust bearing structure of the centrifugal compressor of high-speed electric expreess locomotive according to claim 1, is characterized in that: aeroseal and described axial thrust bearing link together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520448927.1U CN204783801U (en) | 2015-06-26 | 2015-06-26 | High speed motor's centrifugal compressor's axial footstep bearing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520448927.1U CN204783801U (en) | 2015-06-26 | 2015-06-26 | High speed motor's centrifugal compressor's axial footstep bearing structure |
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| Publication Number | Publication Date |
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| CN204783801U true CN204783801U (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520448927.1U Active CN204783801U (en) | 2015-06-26 | 2015-06-26 | High speed motor's centrifugal compressor's axial footstep bearing structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321498A (en) * | 2015-06-26 | 2017-01-11 | 上海优耐特斯压缩机有限公司 | Axial thrust bearing structure of centrifugal compressor of high-speed motor |
| CN106837849A (en) * | 2017-01-16 | 2017-06-13 | 湖南航翔燃气轮机有限公司 | Centrifugal blower high speed rotor structure |
-
2015
- 2015-06-26 CN CN201520448927.1U patent/CN204783801U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321498A (en) * | 2015-06-26 | 2017-01-11 | 上海优耐特斯压缩机有限公司 | Axial thrust bearing structure of centrifugal compressor of high-speed motor |
| CN106837849A (en) * | 2017-01-16 | 2017-06-13 | 湖南航翔燃气轮机有限公司 | Centrifugal blower high speed rotor structure |
| CN106837849B (en) * | 2017-01-16 | 2018-01-30 | 湖南航翔燃气轮机有限公司 | Centrifugal blower high speed rotor structure |
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