CN101315083A - Anchorage system for the rotors of a rotating fluid machine - Google Patents

Anchorage system for the rotors of a rotating fluid machine Download PDF

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Publication number
CN101315083A
CN101315083A CNA2008101100548A CN200810110054A CN101315083A CN 101315083 A CN101315083 A CN 101315083A CN A2008101100548 A CNA2008101100548 A CN A2008101100548A CN 200810110054 A CN200810110054 A CN 200810110054A CN 101315083 A CN101315083 A CN 101315083A
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CN
China
Prior art keywords
rotor
axle
interference
shank
circumferential surface
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Application number
CNA2008101100548A
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Chinese (zh)
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CN101315083B (en
Inventor
M·平召蒂
M·卡马蒂
G·贝尔托尼
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Nuovo Pignone SpA
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Nuovo Pignone SpA
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Publication of CN101315083A publication Critical patent/CN101315083A/en
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Publication of CN101315083B publication Critical patent/CN101315083B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/266—Rotors specially for elastic fluids mounting compressor rotors on shafts

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

An anchorage system is described for a rotor (18) of a rotating fluid machine (10). The rotor (18) has a profile which comprises a first front surface (24) substantially concave and a second rear surface (26) substantially convex, opposite to the first front surface (24). The rotor (18) also has a central portion (28), configured for being constrained with interference on a rotating shaft (14) of the machine (10) and equipped with a shank (30) connected with the second rear surface (26). The system comprises at least one check ring (32) assembled by interference on the shank (30) of the rotor (18). The check ring (32) has a first internal circumferential surface (34), coupled by interference with the shank (30), and a second internal circumferential surface (36), coupled by interference with the shaft (14), to increase the torque which can be transmitted from the shaft (14) to the rotor (18).

Description

The anchor system that is used for the rotor of rotating fluid machine
Technical field
The present invention relates to a kind of anchor system that is used for the rotor of rotating fluid machine, relate more specifically at the rotor of centrifugal compressor and the anchor system between the running shaft.
Background technique
Known compressor is to utilize mechanical energy to improve the machine of the pressure of compressible fluid (gas).Among all kinds compressor that in industrial treatment equipment, uses, relate to so-called centrifugal compressor, wherein the mode of the centrifugal acceleration that causes with the rotation by the driver that is commonly called rotor or turbine blade of energy offers gas, and this rotation is driven by driver (motor or steam turbine) usually.
Centrifugal compressor can be provided with single rotor in so-called single-stage is provided with, perhaps be provided with some rotors that in series are provided with, and is called multistage compressor in this case.More specifically, usually each level of centrifugal compressor all is made of sucking pipe, rotor and Diffuser, wherein sucking pipe is used for gas to be compressed, and rotor can provide kinetic energy to gas, and the function of Diffuser is that the kinetic energy that will leave the gas of rotor converts the pressure energy to.
The rotor of centrifugal compressor is the form of dish usually, and the heart partly has the hub portion of the blade that can support varying number therein.Hub portion is equipped with central through bore, and it allows rotor to be constrained on the running shaft of centrifugal compressor by the mode of wedging usually.
In the rotor of known type, if particularly this rotor be by light metal alloy (for example aluminium) but not steel make in case with specific fluid operating, one of them problem of appearance is, keeps enough interference with axle at the run duration of compressor.In fact, at the run duration of machine, the interference that keeps sufficient between one or more rotors and axle is the necessary condition that keeps balancing rotor and the needed transmitting torque from shaft of rotor self work capacity is delivered to rotor.Especially crucial above-mentioned second rotor of aspect on being installed to axle.In fact, because the influence of thermal expansion and centrifugal force, rotor hubs, the rotor hubs of making by aluminum alloy particularly, it is very large that its radial expansion is compared with the radial expansion of the identical end product that is formed from steel, lose interference whole or in part thereby impel, in any case and also be fewer than transmitting torque.
Especially, the rotor of being made by light aluminum alloy can not be installed on the axle simply, because these aluminum alloys have lower Young's modulus, this arrives the specific contact pressure of axle and higher thermal expansion coefficient corresponding to lower rotor hubs, and higher thermal expansion coefficient causes losing most of interference at the run duration of rotor.At present, only imagination also is on the end of compressor shaft with the head that rotor made of aluminum is installed to axle, especially promotes the centrally aligned system and promote the moment of torsion transmission on the end.
Summary of the invention
An object of the present invention is, the anchor system of the rotor by being provided for rotating fluid machine, more specifically by between the rotor of centrifugal compressor and running shaft, providing anchor system, it is particularly useful for guaranteeing transmitted power by the interference between axle and the rotor under the situation of using the rotor of being made by aluminum alloy, solves the problem about the rotor of known type.
Another object of the present invention is, is provided for the anchor system of the rotor of rotating fluid machine, and it also makes the rotor assembly made by aluminum alloy not merely meet with the one end along the axle of multistage compressor, guarantees suitable in the moment of torsion transmission.
According to the present invention, this purpose realizes by the anchor system that is provided at the rotor that is used for rotating fluid machine illustrated in the claim 1.
Detail of the present invention is described in the dependent claims.
The feature and advantage of illustrating according to the anchor system of the rotor that is used for rotating fluid machine of the present invention are described by following explanation and indefiniteness.
Description of drawings
With reference to the accompanying drawings, wherein:
Fig. 1 is the partial section of a class multistage centrifugal compressor, and this multistage centrifugal compressor is equipped with a plurality of rotors on the axle that is installed between two spring bearings;
Fig. 2 is the schematic cross-section according to the anchor system of the rotor that is used for rotating fluid machine of the present invention; And
Fig. 3 is according to another schematic cross-section of the anchor system of the rotor that is used for rotating fluid machine of the present invention, has wherein indicated some base dimensions.
Embodiment
Specifically with reference to figure 1, it has shown as a whole and by a class multistage centrifugal compressor of label 10 indications.Compressor 10 is included in casing or the stator 12 of wherein having assembled axle 14 rotatably, and wherein this axle 14 is shelved on a plurality of spring bearings 16.A plurality of rotors 18 are fitted on the axle 14, and each rotor 18 is all equipped the circumferential blade 20 with a plurality of roughly radial expansion successively.Passage or be called dividing plate 22 and be positioned on the casing 12, it can be carried compressible fluid (gas) to the first order, and is delivered to following stages from the first order, discharges from compressor 10 under pressure then.
With reference to figure 2, it is the sectional view of single rotor 18, and rotor 18 is preferably made by aluminum alloy, and is similar to being assembled on the axle 14 in the mode of interference like that of taking place in more common rotor made of steel.
Rotor 18 has first front surface 24 that comprises basically depression and with respect to the profile of second rear surface 26 of projection basically of first front surface 24.
Be commonly referred to the central part 28 of the rotor 18 of " hub portion ", it is configured to be limited on the axle 14 of compressor 10 in the mode of interference, is equipped with the shank 30 with appropriate length, and this shank 30 is connected with the rear surface 26 of rotor 18 self.
According to the present invention, lock ring 32 has two circumferential surface 34 and 36 that diameter is inequality, and its mode with interference is assembled on the shank 30 of rotor 18.Have larger-diameter first circumferential surface 34 and be connected to the outer dia D of shank 30 in the mode of interference e(Fig. 3), directly be connected on the axle 14 and have than second circumferential surface 36 of minor diameter mode with interference.Like this, at the run duration of compressor 10, can be increased in the interference that produces between the outer dia of shank 30 and the lock ring 32.
As shown in Figure 2, in order to increase the interference between the each several part and to improve moment of torsion transferability from axle 14 to each rotor 18, one or more chocks 38 preferably are inserted between second internal surface 36 of the outer surface of axle 14 and lock ring 32.
For further increase can be delivered to the moment of torsion of rotor 18 from axle 14, lock ring 32 also can be applicable on the front side portion of rotor 18, and is also promptly consistent with the eyelet 40 of rotor 18 self.
Find the diameter D of axle 14 and the outer dia D of shank 30 according to experimental test and control to the efficient of compressor 10 e, lock ring 32 outer dia D aAnd length L c, L aRatio be the basis, length L wherein cAnd L aMeasure and represent respectively effective length and the length of second surface 36 or the effective length (see figure 3) of lock ring 32 of shank 30 along the axial direction of axle 14.
The diameter D of reference axis 14, the ratio below utilizing obtain between size, tension force and the efficient compromise preferably:
D e D = 1.10 ÷ 1.25
D a D = 1.40 ÷ 1.60
L c D = 0.25 ÷ 0.35
L a
The length of lock ring 32 is extended on the axial direction of axle 14, except that the shank 30 of rotor 18 (as shown in Figures 2 and 3), consider the axial obstruction pitch of multistage compressor 10 rotors 18 in other words, lock ring 32 itself can be equipped with the part 42 of the outer surface that suitably is configured as the lock ring 32 consistent with dividing plate 22, increases the diameter of inter-stage labyrinth seal part.
As seen, be used for the anchor system of the rotor of rotating fluid machine according to the present invention, especially the anchor system between the running shaft of rotor and centrifugal compressor can achieve the above object.In fact, this system allows the transmitting torque from shaft of necessity is delivered to rotor, even these rotors are made by light alloy (aluminum alloy), and makes identical rotor keep centering on the axle of machine, eliminates rotor unbalance danger during compressor operating.
Can do a lot of the modification and modification to the anchor system that is used for the rotor of rotating fluid machine according to the present invention, as long as it falls within the scope of the invention; In addition, the element that is equal on can operation technique of all details substitutes.In fact, the material of use, form and size can change according to Technology Need.
Therefore, protection scope of the present invention is defined by the appended claims.

Claims (8)

1. anchor system that is used for the rotor (18) of rotating fluid machine (10), described rotor (18) has first front surface (24) that comprises basically depression and the basically profile of second rear surface (26) of projection relative with described first front surface (24), and has a central part (28) of rotor (18), it is configured to be limited on the running shaft (14) of described machine (10) in the mode of interference, and be equipped with the shank (30) that is connected with described second rear surface (26) of described rotor (18), it is characterized in that, described anchor system comprises that the mode with interference is assembled at least one lock ring (32) on the described shank (30) of described rotor (18), second circumferential surface (36) that described lock ring (32) has first circumferential surface (34) that connects in the mode of interference with described shank (30) and connects in the mode of interference with described axle (14) is to increase the moment of torsion that can be delivered to described rotor (18) from described axle (14).
2. system according to claim 1 is characterized in that, described first circumferential surface (34) has with respect to the bigger diameter of described second circumferential surface (36).
3. system according to claim 2, it is characterized in that, between described second circumferential surface (36) of the outer surface of described axle (14) and described lock ring (32), insert one or more chocks (38), to increase the interference between the each several part and to improve moment of torsion transferability from described axle (14) to described rotor (18).
4. system according to claim 1 and 2 is characterized in that, the outer dia (D of described shank (30) e) and the diameter (D) of described axle (14) between ratio in 1.10 to 1.25 scopes.
5. system according to claim 1 and 2 is characterized in that, the outer dia (D of described lock ring (32) a) and the described diameter (D) of described axle (14) between ratio in 1.40 to 1.60 scopes.
6. system according to claim 1 and 2 is characterized in that, the length (L of the described shank of measuring along described axle (14) axial direction (30) c) and the described diameter (D) of described axle (14) between ratio in 0.25 to 0.35 scope.
7. system according to claim 1 and 2 is characterized in that, the length (L of described second circumferential surface of measuring along the axial direction of described axle (14) (36) a) and the described diameter (D) of described axle (14) between ratio in 0.40 to 0.70 scope.
8. a rotating fluid machine (10) is characterized in that, described rotating fluid machine (10) comprises according to each the anchor system that is used for rotor (18) in the aforesaid right requirement.
CN2008101100548A 2007-05-30 2008-05-29 Anchorage system for the rotors of a rotating fluid machine Expired - Fee Related CN101315083B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2007A001100 2007-05-30
IT001100A ITMI20071100A1 (en) 2007-05-30 2007-05-30 ANCHORAGE SYSTEM FOR THE IMPELLERS OF A ROTARY FLUID MACHINE

Publications (2)

Publication Number Publication Date
CN101315083A true CN101315083A (en) 2008-12-03
CN101315083B CN101315083B (en) 2013-09-18

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US (1) US20080298971A1 (en)
EP (1) EP1998050A1 (en)
JP (1) JP5620633B2 (en)
CN (1) CN101315083B (en)
IT (1) ITMI20071100A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103307124A (en) * 2013-07-03 2013-09-18 中国航空动力机械研究所 High-speed rotor positioning link structure
CN104696275A (en) * 2010-12-08 2015-06-10 三菱重工业株式会社 Rotary machine
US9797255B2 (en) 2011-12-14 2017-10-24 Nuovo Pignone S.P.A. Rotary machine including a machine rotor with a composite impeller portion and a metal shaft portion
US9810230B2 (en) 2009-05-08 2017-11-07 Nuovo Pignone Srl Impeller for a turbomachine and method for attaching a shroud to an impeller
US9810235B2 (en) 2009-11-23 2017-11-07 Massimo Giannozzi Mold for a centrifugal impeller, mold inserts and method for building a centrifugal impeller
US9816518B2 (en) 2009-11-23 2017-11-14 Massimo Giannozzi Centrifugal impeller and turbomachine
US11162505B2 (en) 2013-12-17 2021-11-02 Nuovo Pignone Srl Impeller with protection elements and centrifugal compressor

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CN106593941B (en) * 2016-11-29 2019-03-29 东方电气集团东方汽轮机有限公司 A kind of rotor pump impeller installation and positioning structure
US11408434B2 (en) 2019-12-10 2022-08-09 Ingersoll-Rand Industrial U.S., Inc. Centrifugal compressor impeller with nonlinear backwall

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9810230B2 (en) 2009-05-08 2017-11-07 Nuovo Pignone Srl Impeller for a turbomachine and method for attaching a shroud to an impeller
US9810235B2 (en) 2009-11-23 2017-11-07 Massimo Giannozzi Mold for a centrifugal impeller, mold inserts and method for building a centrifugal impeller
US9816518B2 (en) 2009-11-23 2017-11-14 Massimo Giannozzi Centrifugal impeller and turbomachine
CN104696275A (en) * 2010-12-08 2015-06-10 三菱重工业株式会社 Rotary machine
CN104696275B (en) * 2010-12-08 2018-02-13 三菱重工业株式会社 Rotating machinery
US9797255B2 (en) 2011-12-14 2017-10-24 Nuovo Pignone S.P.A. Rotary machine including a machine rotor with a composite impeller portion and a metal shaft portion
CN103307124A (en) * 2013-07-03 2013-09-18 中国航空动力机械研究所 High-speed rotor positioning link structure
CN103307124B (en) * 2013-07-03 2015-08-19 中国航空动力机械研究所 High speed rotor location connecting structure
US11162505B2 (en) 2013-12-17 2021-11-02 Nuovo Pignone Srl Impeller with protection elements and centrifugal compressor

Also Published As

Publication number Publication date
JP5620633B2 (en) 2014-11-05
CN101315083B (en) 2013-09-18
US20080298971A1 (en) 2008-12-04
EP1998050A1 (en) 2008-12-03
JP2008298287A (en) 2008-12-11
ITMI20071100A1 (en) 2008-11-30

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Granted publication date: 20130918

Termination date: 20160529