US20130330193A1 - Turbomachinery - Google Patents

Turbomachinery Download PDF

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Publication number
US20130330193A1
US20130330193A1 US13/966,368 US201313966368A US2013330193A1 US 20130330193 A1 US20130330193 A1 US 20130330193A1 US 201313966368 A US201313966368 A US 201313966368A US 2013330193 A1 US2013330193 A1 US 2013330193A1
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US
United States
Prior art keywords
impeller
shaft
way screw
fitting
rotation axis
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.)
Abandoned
Application number
US13/966,368
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English (en)
Inventor
Nozomu ASANO
Shusaku Yamasaki
Toshimichi Taketomi
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.)
IHI Corp
Original Assignee
IHI Corp
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 IHI Corp filed Critical IHI Corp
Assigned to IHI CORPORATION reassignment IHI CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ASANO, NOZOMU, TAKETOMI, TOSHIMICHI, YAMASAKI, SHUSAKU
Publication of US20130330193A1 publication Critical patent/US20130330193A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/02—Blade-carrying members, e.g. rotors
    • F01D5/025—Fixing blade carrying members on shafts
    • 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
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps

Definitions

  • a turbomachinery such as a turbocompressor or a supercharger is provided with an impeller that is rotatively driven by rotative power that is transmitted from a shaft.
  • a male screw and a female screw are formed on an impeller and a shaft as shown in Patent Document 1 and Patent Document 2.
  • the impeller and the shaft are then fastened by screwing together of the male screw and the female screw.
  • the present invention was achieved in view of the above circumstances, and has as its object to, in a turbomachinery that is provided with an impeller and a shaft that are to be fastened, eliminating the need for complicated and large equipment and reducing the amount of work during fastening when fastening the impeller to the shaft.
  • a turbomachinery according to a second aspect of the present invention adopts a constitution in which, in the aforementioned first aspect, the two-way screw is formed with a material having a higher thermal conductivity than the impeller.
  • a turbomachinery according to a third aspect of the present invention adopts a constitution in which, in the aforementioned second aspect, the two-way screw is formed with a steel material in the case of the impeller being formed with a titanium alloy.
  • a turbomachinery according to a fourth aspect of the present invention adopts a constitution providing a rotation inhibiting member that inhibits rotational movement of the impeller with respect to the shaft, in any of the first to third aspects.
  • a turbomachinery according to a fifth aspect of the present invention adopts a constitution in which, in the aforementioned fourth aspect, the rotation inhibiting member, with the rotation axis direction of the impeller serving as the lengthwise direction, is a fitting hole that is provided at a position offset from the rotation axis of the impeller and a pin member that is fitted in a fitting hole that is provided at a position offset from the rotation axis of the shaft.
  • a turbomachinery according to a seventh aspect of to the present invention adopts a constitution in which, in the aforementioned fourth aspect, the rotation inhibiting member is provided with a fitting projection whose outer shape seen from the rotation axis direction of the impeller deviates from the rotation body shape, and is provided projecting in the rotation axis direction with respect to the impeller or the shaft, and a fitting hole that is provided in the impeller or the shaft where the fitting projection is not provided, and in which the fitting projection is fitted.
  • a turbomachinery according to an eighth aspect of the present invention adopts a constitution in which, in the aforementioned seventh aspect, the fitting projection has a shape whose center of gravity is on the rotation axis.
  • a turbomachinery according to a ninth aspect of the present invention adopts a constitution in which any of the aforementioned first to eighth aspects is provided with a lock bolt that abuts the two-way screw from the rotation axis direction of the impeller.
  • a turbomachinery according to a tenth aspect of the present invention adopts a constitution in which, in any of the aforementioned first to ninth aspects, the turning direction of the screw thread that is formed on the impeller screwing region is set to a direction in which the fastening power between the two-way screw and the impeller increases due to a reactive force when the impeller is rotatively driven.
  • a turbomachinery according to an eleventh aspect of the present invention adopts a constitution in which, in any of the aforementioned first to tenth inventions, a fitting hole or a fitting projection that is capable of fitting a tool that rotates the two-way screw is provided on the impeller-side end face of the two-way screw, and an exposure hole that exposes the fitting hole or the fitting projection is provided in the impeller.
  • a turbomachinery according to a twelfth aspect of the present invention adopts a constitution in which, in the aforementioned eleventh aspect, the fitting hole or the fitting projection that is capable of fitting a tool that rotates the two-way screw has a shape whose center of gravity is centered on the rotation axis of the impeller.
  • the impeller and the shaft by rotating the two-way screw, it is possible to cause the impeller and the shaft to move in a straight line along the rotation axis direction without the impeller undergoing rotative movement with respect to the shaft. That is to say, according to the present invention, compared to the case of fastening the impeller and the shaft while rotatively moving the impeller with respect to the shaft, it is possible to reduce the amount of movement of the impeller, and it is possible to cut down the amount of work during fastening.
  • the impeller when the impeller is pushed to the shaft side and made to undergo elastic deformation in order to ensure the frictional force with the shaft, it is possible to cause the impeller and the shaft to move in a straight line along the rotation axis direction without the impeller undergoing rotative movement with respect to the shaft. That is to say, according to the present invention, compared to the case of fastening the impeller and the shaft while rotatively moving the impeller with respect to the shaft, it is possible to reduce the friction resistance and possible to cut down the amount of work during fastening.
  • FIG. 1 is a cross-sectional view that shows the outline constitution of the turbocompressor in the first embodiment of the present invention.
  • FIG. 2 is a schematic diagram for describing the work of fastening the compressor impeller and the shaft that the turbocompressor in the first embodiment of the present invention is provided with.
  • FIG. 3A is a cross-sectional view that shows the outline constitution of the turbocompressor in the second embodiment of the present invention.
  • FIG. 3B is a view on arrow seen from the rotation axis direction of the shaft of FIG. 3A .
  • FIG. 4A is a cross-sectional view that shows the outline constitution of the turbocompressor in the third embodiment of the present invention.
  • FIG. 4B is a view on arrow seen from the rotation axis direction of the shaft of FIG. 4A .
  • FIG. 5 is a cross-sectional view that shows the outline constitution of the turbocompressor in the fourth embodiment of the present invention.
  • FIG. 6 is a cross-sectional view that shows a modification of the turbocompressor in the first embodiment of the present invention.
  • turbocompressor as one example of the turbomachinery of the present invention, but the turbomachinery of the present invention is not limited to a turbocompressor, and it can also be applied to general turbomachinerys provided with an impeller and a shaft such as a supercharger.
  • FIG. 1 is a cross-sectional view that shows the outline constitution of a turbocompressor S 1 of the present embodiment.
  • the turbocompressor S 1 is a machinery that compresses a gas such as air and emits it as compressed gas, and as shown in FIG. 1 , is provided with a compressor 1 , a shaft 2 , a two-way screw 3 , and a drive unit 4 .
  • the compressor is a member for compressing gas by being driven, and is equipped with a compressor impeller 1 a (equivalent to the impeller of the present invention), and the compressor housing 1 b.
  • a housing space of the two-way screw 3 is provided in communication with the fitting hole 1 e .
  • a screw thread is formed in the inner wall surface of this housing space and constituted so as to be a female thread that a first end side of the two-way screw 3 can be screwed together with.
  • an exposure hole if that exposes a first end face of the two-way screw 3 is formed from a distal end of the compressor impeller 1 a .
  • the exposure hole 1 f has a diameter that allows the passing through of a tool 10 that rotates the two-way screw 3 described later (refer to FIG. 2 ), and is provided along the rotation axis L of the compressor impeller 1 a.
  • the fitting hole 1 e and the exposure hole if sandwich the housing space of the two-way screw 3 , and are arranged so as to be concentric with the rotation axis L of the compressor impeller 1 a.
  • the compressor impeller 1 a is formed for example with a titanium alloy, an aluminum alloy, or stainless steel, depending on the gas to be compressed.
  • the shaft 2 is a member for transmitting power generated by the drive unit 4 as rotative power to the compressor impeller 1 a , and is connected with the drive unit 4 .
  • a fitting projection 2 a is provided for fitting in the fitting hole 1 e provided in the base portion 1 c of the compressor impeller 1 a , and by the fitting projection 2 a being fitted in the fitting hole 1 e , the compressor impeller 1 a and the shaft 2 are positioned so as to be coaxial.
  • a female screw that a second end side of the two-way screw 3 is capable of screwing together with is provided in the fitting projection 2 a.
  • the shaft 2 is formed for example with a steel material (for example, a steel material including chrome and molybdenum).
  • a steel material for example, a steel material including chrome and molybdenum.
  • the two-way screw 3 is a member for fastening the compressor impeller 1 a and the shaft 2 .
  • the first end side of this two-way screw 3 serves as an impeller screwing region 3 a that is screwed together with the compressor impeller 1 a
  • the second end side serves as a shaft screwing region 3 b that is screwed together with the shaft 2 .
  • the turning direction of the screw thread that is formed on the impeller screwing region 3 a is set to a direction in which the fastening power between the two-way screw 3 and the compressor impeller 1 a increases due to a reactive force when the compressor impeller 1 a is rotatively driven.
  • a fitting hole 3 c for fitting a tool 10 for rotating the two-way screw 3 is provided in the first end face of the two-way screw 3 (a face on the compressor impeller 1 a side).
  • the shape of this fitting hole 3 a is set to a shape, viewed from the rotation axis L direction, whose center of gravity is on the rotation axis L (for example, a hexagonal shape).
  • the shape of the fitting hole 3 c have a shape whose center of gravity is on the rotation axis L, when the compressor impeller 1 a is rotated, it is possible to keep the weight distribution of the compressor impeller 1 a that is centered on the rotation axis L uniform, and it is possible to rotate the compressor impeller 1 a in a stable manner.
  • the first end face of the two-way screw 3 is exposed by the exposure hole 1 f that is provided in the base portion 1 c of the compressor impeller 1 a as described above. For this reason, the fitting hole 3 c that is formed in the first end face of the two-way screw 3 is exposed from a first end of the compressor impeller 1 a via the exposure hole 1 f.
  • the two-way screw 3 is formed with a material having a higher thermal conductivity than the compressor impeller 1 a.
  • the two-way screw 3 by forming the two-way screw 3 with a material having a higher thermal conductivity than the compressor impeller 1 a , it is possible to promote heat transfer from the compressor impeller 1 a , which has risen in temperature due to the compression of gas, to the shaft 2 , and it is possible to promptly transfer the heat to lubricating oil that is to be cooled by a cooling mechanism not shown.
  • the thermal expansion of the two-way screw 3 becomes greater than the compressor impeller 1 a .
  • the compressor impeller 1 a and the shaft 2 separating when the fastening portion becomes a high temperature
  • the two-way screw 3 and the compressor impeller 1 a are screwed together, and the two-way screw 3 and the shaft 2 are screwed together. For this reason, the contact surface between the two-way screw 3 and the compressor impeller and the contact surface area between the two-way screw 3 and the shaft 2 broaden, the heat transmission area increases, and it is possible to further promote the aforementioned heat transfer.
  • the drive unit 4 is a member for generating power for rotatively driving the compressor impeller 1 a and transmitting it to the shaft 2 , and for example, is constituted to include a motor and gears and the like.
  • the compressor impeller 1 a moves in a straight line along the rotation axis L without undergoing rotative movement with respect to the shaft 2 .
  • the compressor impeller 1 a and the shaft 2 are fastened.
  • turbocompressor S 1 of the present embodiment since it is possible to fasten the compressor impeller 1 a and the shaft 2 without applying great tension to the two-way screw 3 , there is no need for an additional complicated and large equipment such as a hydraulic tensioner.
  • turbocompressor S 1 of the present embodiment it is possible to cut down the work amount when fastening the compressor impeller 1 a to the shaft 2 without additionally requiring a complicated and large device.
  • turbocompressor S 1 of the present embodiment it is possible to inhibit loosening of the fastening power between the compressor impeller 1 a and the two-way screw 3 during operation.
  • the fitting hole 3 c that is capable of fitting the tool 10 that rotates the two-way screw 3 is provided in the end face of the two-way screw 3 on the compressor impeller 1 a side, and the exposure hole 1 f that exposes the fitting hole 3 c is provided in the compressor impeller 1 a.
  • turbocompressor S 1 of the present embodiment in order to fasten the compressor impeller 1 a and the shaft 2 by the two-way screw 3 , there is no need to extend the shaft 2 until the distal end of the compressor impeller 1 a in the manner of a conventional turbocompressor in order to fix the compressor impeller 1 a .
  • the shaft 2 becomes short, and so it is possible to improve the rigidity of the shaft 2 .
  • the turbocompressor S 2 of the present embodiment is, with the rotation axis L direction serving as the lengthwise direction, equipped with a fitting hole that is provided at a position offset from the rotation axis L of the compressor impeller 1 a , and a pin member 5 to be fitted in the fitting hole that is provided at a position offset from the rotation axis L of the shaft 2 .
  • a plurality of the pin members 5 are arranged at equally spaced intervals centered on the rotation axis L of the compressor impeller 1 a.
  • turbocompressor S 2 of the present embodiment having this kind of constitution, when attaching the compressor impeller 1 a to the shaft 2 by the pin members 5 , it is possible to inhibit rotational movement of the compressor impeller 1 a , and it is possible to fasten the compressor impeller 1 a and the shaft 2 in a stable manner.
  • the pin members 5 function as reinforcing members at the joining location of the compressor impeller 1 a and the shaft 2 . For this reason, it is possible to increase the strength of the joining location of the compressor impeller 1 a and the shaft 2 .
  • the pin members 5 are fitted in either one of the compressor impeller 1 a and the shaft 2 , and then fitted in the other by bringing the compressor impeller 1 a and the shaft 2 together by rotation of the two-way screw 3 .
  • the turbocompressor S 2 of the present embodiment realizes an improvement in strength at the joining location of the compressor impeller 1 a and the shaft 2 that cannot be realized in a turbocompressor that uses the conventional fastening method of rotatively moving the compressor impeller 1 a with respect to the shaft 2 .
  • a plurality of the pin members 5 are provided at equally spaced intervals centered on the rotation axis L of the compressor impeller 1 a.
  • FIG. 4A and FIG. 4B are drawings that show the outline constitution of the turbocompressor S 3 of the present embodiment.
  • FIG. 4A is a cross-sectional view
  • FIG. 4B is a view on arrow of the shaft 2 seen from the direction of the rotation axis L.
  • the turbocompressor S 3 of the present embodiment is equipped with a fitting projection 7 of which the shape seen from the rotation axis L direction of the compressor impeller 1 a is an approximately triangular shape having rounded apices (a shape deviating from the rotation body shape) whose center of gravity is on the rotation axis L, and a fitting hole 6 that the fitting projection 7 is fitted into.
  • this kind of fitting projection 7 and fitting hole 6 function as a rotation inhibiting member of the present invention, by inhibiting rotational movement of the compressor impeller 1 a with respect to the shaft 2 .
  • the fitting projection 7 is provided at the shaft 2 , while the fitting hole 6 is provided in the compressor impeller 1 a.
  • turbocompressor S 3 of the present embodiment having this kind of constitution, when attaching the compressor impeller 1 a to the shaft 2 by the fitting projection 7 and the fitting hole 6 , it is possible to inhibit rotational movement of the compressor impeller 1 a , and so it is possible to fasten the compressor impeller 1 a and the shaft 2 in a stable manner.
  • the fitting projection 7 has a shape whose center of gravity is on the rotation axis L.
  • FIG. 5 is a cross-sectional view that shows the outline constitution of the turbocompressor S 4 of the present embodiment.
  • a tool hole (for example with a hexagonal shape) that penetrates in the rotation axis L direction and that is used when fastening or loosening the lock bolt 8 .
  • the inscribed circle of this tool hole is set to be larger than the circumscribed circle of the tool 10 that fits in the fitting hole 3 c of the two-way screw 3 . For this reason, the tool 10 can fit in the two-way screw 3 by passing through the lock bolt 8 .
  • turbocompressor S 4 of the present embodiment having this constitution, even in the case of the compressor impeller 1 a attempting to undergo rotational movement in the direction of loosening of the fastening power, it is possible to inhibit displacement of the two-way screw 3 in the rotation axis L direction by the lock bolt 8 . As a result, it is possible to prevent rotational movement of the compressor impeller 1 a in the direction of loosening of the fastening power.
  • the fitting projection 2 a is provided at the shaft 2
  • the fitting hole 1 e is provided in the compressor impeller 1 a.
  • the two-way screw 3 is arranged greatly recessed in the interior of the shaft 2 . For that reason, it is possible to allow the two-way screw 3 to escape from the root region of the maximum diameter portion in the compressor impeller 1 a where the load becomes great due to the highest stress acting, and so it is possible to reduce the load that acts on the two-way screw 3 .
  • the present invention is not limited thereto, and it is also possible to adopt a constitution in which the two-way screw 3 , instead of the fitting hole 3 a , is equipped with a fitting projection that a tool is capable of fitting.
  • turbocompressor in which one shaft and one compressor impeller 1 a at one end of the shaft are fastened.
  • the present invention is not limited thereto, and it can also be applied to a turbocompressor in which a compressor impeller 1 a is fastened to both ends of one shaft, a turbocompressor that is provided with a plurality of shafts and in which a compressor impeller is provided at each shaft, and a turbocompressor that is provided with other equipment such as a cooler or the like that cools the compressed gas.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US13/966,368 2011-02-21 2013-08-14 Turbomachinery Abandoned US20130330193A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2011034519A JP5589889B2 (ja) 2011-02-21 2011-02-21 ターボ機械
JP2011-034519 2011-02-21
PCT/JP2012/054077 WO2012115086A1 (ja) 2011-02-21 2012-02-21 ターボ機械

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/054077 Continuation WO2012115086A1 (ja) 2011-02-21 2012-02-21 ターボ機械

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US20130330193A1 true US20130330193A1 (en) 2013-12-12

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US13/966,368 Abandoned US20130330193A1 (en) 2011-02-21 2013-08-14 Turbomachinery

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US (1) US20130330193A1 (ko)
EP (1) EP2679827B1 (ko)
JP (1) JP5589889B2 (ko)
KR (1) KR101501761B1 (ko)
CN (1) CN103370544A (ko)
WO (1) WO2012115086A1 (ko)

Cited By (6)

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WO2014083325A1 (en) * 2012-11-28 2014-06-05 Napier Turbochargers Limited Turbocharger impeller screwed onto shaft with arrangement for accommodating thermal dilatation
CN104019057A (zh) * 2014-05-26 2014-09-03 河南众力空分设备有限公司 一种悬臂式叶轮与传动轴的传动连接装置
US20160208821A1 (en) * 2013-09-20 2016-07-21 Abb Turbo Systems Ag Exhaust gas turbocharger
US10576239B2 (en) 2017-02-27 2020-03-03 Third Pole, Inc. System and methods for ambulatory generation of nitric oxide
US11585348B2 (en) * 2019-03-14 2023-02-21 Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. Compressor wheel device and supercharger
US20230147254A1 (en) * 2021-11-11 2023-05-11 Progress Rail Locomotive Inc. Impeller attach mechanism

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GB201314270D0 (en) * 2013-08-09 2013-09-25 Aeristech Ltd Aerodynamic enhancements in compressors
KR101825509B1 (ko) * 2014-03-26 2018-02-05 가부시키가이샤 아이에이치아이 임펠러 체결 구조 및 터보 압축기
WO2016188524A1 (de) * 2015-05-27 2016-12-01 Schaeffler Technologies AG & Co. KG Läufer für einen abgasturbolader und abgasturbolader
JP2018114565A (ja) * 2017-01-16 2018-07-26 三菱マテリアル株式会社 切削工具
EP3757399A4 (en) * 2018-02-20 2021-04-21 Panasonic Intellectual Property Management Co., Ltd. HUB, ROTATING FAN, ELECTRIC FAN, ELECTRIC CLEANER AND HAND DRYER
CN109372582A (zh) * 2018-12-16 2019-02-22 阜宁隆德机械制造有限责任公司 一种外置传动叶轮

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Cited By (10)

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Publication number Priority date Publication date Assignee Title
WO2014083325A1 (en) * 2012-11-28 2014-06-05 Napier Turbochargers Limited Turbocharger impeller screwed onto shaft with arrangement for accommodating thermal dilatation
EP2933499A1 (en) * 2012-11-28 2015-10-21 Napier Turbochargers Limited Turbocharger impeller screwed onto shaft with arrangement for accommodating thermal dilatation
US10018205B2 (en) 2012-11-28 2018-07-10 Napier Turbochargers Limited Impeller shaft
US20160208821A1 (en) * 2013-09-20 2016-07-21 Abb Turbo Systems Ag Exhaust gas turbocharger
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CN103370544A (zh) 2013-10-23
EP2679827A1 (en) 2014-01-01
JP2012172576A (ja) 2012-09-10
EP2679827A4 (en) 2016-03-09
KR101501761B1 (ko) 2015-03-11
KR20130129276A (ko) 2013-11-27
JP5589889B2 (ja) 2014-09-17
WO2012115086A1 (ja) 2012-08-30
EP2679827B1 (en) 2019-09-04

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