CN104405683A - Centrifugal-flow compressor rotor structure - Google Patents

Centrifugal-flow compressor rotor structure Download PDF

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Publication number
CN104405683A
CN104405683A CN201410778607.2A CN201410778607A CN104405683A CN 104405683 A CN104405683 A CN 104405683A CN 201410778607 A CN201410778607 A CN 201410778607A CN 104405683 A CN104405683 A CN 104405683A
Authority
CN
China
Prior art keywords
impeller
oil
sealing sleeve
annular protrusion
oil seal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201410778607.2A
Other languages
Chinese (zh)
Inventor
张博
幺克东
高博
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CRRC Dalian Institute Co Ltd
Original Assignee
CNR Dalian Locomotive Research Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CNR Dalian Locomotive Research Institute Co Ltd filed Critical CNR Dalian Locomotive Research Institute Co Ltd
Priority to CN201410778607.2A priority Critical patent/CN104405683A/en
Publication of CN104405683A publication Critical patent/CN104405683A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/08Sealings
    • F04D29/083Sealings especially adapted for elastic fluid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • F04D29/28Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/284Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors

Abstract

The invention discloses a centrifugal flow compressor rotor structure. The structure comprises an impeller and a spindle driving the impeller. The tail portion of the impeller is connected with an oil seal sleeve, the oil seal sleeve is connected with the spindle, a through hole is formed in the center of the impeller, an annular protrusion is formed on the tail portion of the impeller, an annular groove is formed in the front end of the oil seal sleeve to be matched with the annular protrusion on the tail portion of the impeller, an annular groove structure is arranged on the contact portion of the oil seal sleeve and the inner circumferential face of the annular protrusion on the impeller, the inner circumferential face of the annular groove of the oil seal sleeve and the outer circumferential face of the annular protrusion of the impeller are in interference fit, the oil seal sleeve and the spindle are in threaded connection and are radially located through a location port. By means of the matching of the oil seal sleeve and the impeller, the through hole in the center of the impeller is omitted, the wheel body strength of the impeller is improved, and the structure is closer and stable in matching with increase of the rotating speed.

Description

Centrifugal-flow compressor rotor structure
Technical field
The present invention relates to a kind of centrifugal-flow compressor new type rotor structure.
Background technique
The structural design of centrifugal-flow compressor rotor not only has influence on the performance design of gas compressor, is more related to the stability of rotor and the reliability of bearing.At present, a kind of common structure is compressor impeller with central through bore and band key lining interference fit, and lining is connected with main shaft key, and axis is locked by gland and nut.The lining of this structure and main shaft are Spielpassung, and rotor is poor stability when running up, and vibrate larger.Another kind of common structure is compressor impeller with central through bore and lining interference fit, and lining and main shaft pass through conical surface interference fit.Although such a construction increases the stability of rotor, impeller with central through bore structure, must not only limit the design size of impeller like this, greatly reduces the intensity of hub disk simultaneously.The first common structure has strength problem equally.
Summary of the invention
Technical problem solved by the invention is to provide the higher centrifugal-flow compressor rotor structure of a kind of intensity.
The technical solution used in the present invention is, centrifugal-flow compressor rotor structure, comprise the main shaft of impeller and drives impeller, described impeller afterbody is connected with oil-sealing sleeve, oil-sealing sleeve is connected with main shaft, impeller central is without through hole, impeller afterbody forms annular protrusion, the annular protrusion that oil-sealing sleeve front end forms the afterbody of annular groove and impeller is suitable, the inner headed face contact position of oil-sealing sleeve and impeller annular protrusion is provided with groove structure, the inner headed face of the annular groove of oil-sealing sleeve and the periphery of impeller annular protrusion are interference fit, oil-sealing sleeve is connected with spindle thread and passes through positioning spigot radial location.
Oil-sealing sleeve is with left-hand thread seal groove and taper sealing tooth.
The invention has the beneficial effects as follows the cooperation by oil-sealing sleeve and impeller, eliminate the through hole of impeller central, add the intensity of wheel wheel disc, and along with the raising of rotating speed, the cooperation of structure more closely and stable.
Accompanying drawing explanation
Fig. 1 is cross-sectional view of the present invention.
Be labeled as in figure: 1-impeller, 2-annular tail structure, 3-taper sealing tooth, 4-left-hand thread oil sealing, 5-main shaft, 6-oil-sealing sleeve, 7-screw connection structure, 8-groove structure.
Embodiment
Below in conjunction with accompanying drawing to the present invention, be described further.
Centrifugal-flow compressor rotor structure of the present invention, comprise: impeller 1 and main shaft 5, impeller 1 that is to say centrifugal-flow compressor impeller herein, also comprise oil-sealing sleeve 6, impeller afterbody is connected with oil-sealing sleeve 6, oil-sealing sleeve 6 is connected with main shaft 5, impeller 1 center is without through hole, impeller 1 has an annular tail structure 8, also namely impeller 1 afterbody forms the projection of a ring shape backward, the annular protrusion that oil-sealing sleeve 6 front end forms the afterbody of annular groove and impeller 1 is suitable, oil-sealing sleeve 6 is provided with groove structure 8 with the internal surface contact position of impeller 1 annular protrusion, the inner ring surface of the annular groove of oil-sealing sleeve 6 and the outer ring surface of impeller 1 annular protrusion are interference fit, oil-sealing sleeve 6 is threaded with main shaft 5 and by positioning spigot radial location.
Adopt the centrifugal-flow compressor rotor structure of said structure, oil-sealing sleeve 6 adopts groove structure 8, axially locating bottom the annular tail end surface at impeller 1 back side and this annular groove, and the inner headed face interference fit of the periphery of the annular afterbody of impeller 1 and oil-sealing sleeve 6 annular groove, eliminate conventional impeller central through-hole structure like this, be conducive to the intensity improving hub disk; Meanwhile, under rotor working order, the annular afterbody expanded by heating of impeller 1, makes interference fit more tight, enhances the stability of rotor; Oil-sealing sleeve 6 is with left-hand thread seal groove and taper sealing tooth 3, and existing oil sealing function has again envelope airway dysfunction, makes structure compacter; The internal thread of oil-sealing sleeve, with positioning spigot, makes to be threaded more concentric; Be threaded not only simple but also fastening simultaneously, during rotor running, be threaded by screwing force.
Optimum implementation is: impeller 1 diameter is 270mm, annular afterbody external diameter is 60mm, the taper sealing tooth 3 of oil-sealing sleeve is 40 degree, 7 teeth, left-hand thread is Tr85, and screw thread is M20X1.5, by running test within rotor test rotating speed 37000r/min, through overtesting, operation process is stable, and vibration acceleration is less than 1.0g.

Claims (2)

1. centrifugal-flow compressor rotor structure, comprise the main shaft of impeller and drives impeller, it is characterized in that: described impeller afterbody is connected with oil-sealing sleeve, oil-sealing sleeve is connected with main shaft, impeller central is without through hole, impeller afterbody forms annular protrusion, the annular protrusion that oil-sealing sleeve front end forms the afterbody of annular groove and impeller is suitable, the inner headed face contact position of oil-sealing sleeve and impeller annular protrusion is provided with groove structure, the inner headed face of the annular groove of oil-sealing sleeve and the periphery of impeller annular protrusion are interference fit, oil-sealing sleeve is connected with spindle thread and passes through positioning spigot radial location.
2. centrifugal-flow compressor rotor structure as claimed in claim 1, is characterized in that: oil-sealing sleeve is with left-hand thread seal groove and taper sealing tooth.
CN201410778607.2A 2014-12-12 2014-12-12 Centrifugal-flow compressor rotor structure Pending CN104405683A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410778607.2A CN104405683A (en) 2014-12-12 2014-12-12 Centrifugal-flow compressor rotor structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410778607.2A CN104405683A (en) 2014-12-12 2014-12-12 Centrifugal-flow compressor rotor structure

Publications (1)

Publication Number Publication Date
CN104405683A true CN104405683A (en) 2015-03-11

Family

ID=52643336

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410778607.2A Pending CN104405683A (en) 2014-12-12 2014-12-12 Centrifugal-flow compressor rotor structure

Country Status (1)

Country Link
CN (1) CN104405683A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106194818A (en) * 2016-08-31 2016-12-07 中车大连机车研究所有限公司 Centrifugal-flow compressor novel pressure side oil-gas seal structure
CN107677469A (en) * 2017-10-30 2018-02-09 南京磁谷科技有限公司 It is used for the conversion sleeve of impeller test in a kind of overspeed test bench

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106194818A (en) * 2016-08-31 2016-12-07 中车大连机车研究所有限公司 Centrifugal-flow compressor novel pressure side oil-gas seal structure
CN107677469A (en) * 2017-10-30 2018-02-09 南京磁谷科技有限公司 It is used for the conversion sleeve of impeller test in a kind of overspeed test bench

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PB01 Publication
C10 Entry into substantive examination
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WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20150311

WD01 Invention patent application deemed withdrawn after publication