WO2006034623A1 - Dispositif reducteur de courant d’air pulse et de vibrations - Google Patents

Dispositif reducteur de courant d’air pulse et de vibrations Download PDF

Info

Publication number
WO2006034623A1
WO2006034623A1 PCT/CN2005/001363 CN2005001363W WO2006034623A1 WO 2006034623 A1 WO2006034623 A1 WO 2006034623A1 CN 2005001363 W CN2005001363 W CN 2005001363W WO 2006034623 A1 WO2006034623 A1 WO 2006034623A1
Authority
WO
WIPO (PCT)
Prior art keywords
cross
airflow
circular
nozzle
pulsating
Prior art date
Application number
PCT/CN2005/001363
Other languages
English (en)
Chinese (zh)
Inventor
Youhong Liu
Zhijun Luo
Jin Wang
Original Assignee
Youhong Liu
Zhijun Luo
Jin Wang
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 Youhong Liu, Zhijun Luo, Jin Wang filed Critical Youhong Liu
Publication of WO2006034623A1 publication Critical patent/WO2006034623A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers

Definitions

  • Pulsating airflow vibration absorbing device Pulsating airflow vibration absorbing device
  • the invention belongs to the technical field of vibration reduction and disaster prevention, and mainly relates to a pulsating air flow vibration absorbing device. Background technique
  • Pipelines are widely used in industrial production, especially in the petrochemical, electric power, and chemical industries.
  • vapor-liquid two-phase flow piping, large differential pressure piping, and pulsating airflow piping are used to generate vibration during operation, especially In the conveying pipe system of the reciprocating compressor.
  • the working characteristics of the reciprocating compressor are that the suction and exhaust flows are periodic and/or intermittent, so it is inevitable to excite the flow of the inlet and outlet pipes of the compressor to be pulsating. This phenomenon is called airflow pulsation.
  • the flow parameters of the pulsating airflow (such as pressure, velocity, density) vary periodically with position and time.
  • the second cause of tube vibration is resonance.
  • the gas inside the pipe forms an aeroelastic system called the gas column.
  • the fluid acoustic frequency of the gas column itself is called the natural frequency of the gas column.
  • the frequency of intake and exhaust caused by the piston movement of the reciprocating compressor is called the excitation frequency.
  • the piping system and its attachments constitute a system in which the solid structure itself has a frequency called the mechanical natural frequency.
  • the frequency range of (0. 8- 1. 2) f f is the natural frequency of the casing or the natural frequency of the gas column
  • gas column resonance standing wave
  • Structural resonance occurs when the natural frequency of the machine falls within the resonance region of the excitation frequency.
  • the control of the vibration of the piping system is mainly solved by reducing the exciting force of the piping system and improving the vibration characteristics of the piping system. Reducing the exciting force is also the best way to reduce the vibration source.
  • the law is theoretically feasible, but the actual situation is that no effective solution has been found at home and abroad.
  • the existing research results basically add buffer tanks at appropriate positions of the pipelines, or improve the design of the position and form of the pipe clamps in the piping system. Summary of the invention
  • the object of the present invention is to overcome the above-mentioned deficiencies and to provide a pulsating airflow vibration absorbing device for changing the acoustic wave transmission characteristics of the gas passages in the piping system and the auxiliary equipment, reducing the sound wave intensity and reducing the pulsation pressure, thereby achieving the reduction of the piping system and its ancillary equipment. Exciting force.
  • a pulsating airflow damper device which is mainly composed of an outer casing, an inner member and an airflow expansion space, and is characterized in that: the outer casing is provided An air inlet communicating with the input airflow and an air outlet connected to the subsequent duct; the inner member includes a transition section connected to the air inlet and a nozzle having a hollow passage and opening at both ends, the end of the nozzle and the transition The segment is connected, and the other end is in communication with the airflow expansion space; the airflow expansion space is constituted by a space formed between the inner member and the outer casing.
  • the cross-sectional shape of the nozzle having a hollow passage and having both ends open, the outer shape of which is circular or triangular, rectangular, regular pentagon, and regular hexagon, wherein the inner circumference of the empty passage is circular or quadrangular or triangular or a regular pentagon, a regular hexagon, having an outwardly extending groove on the inner periphery of the hollow passage, the groove being a straight line segment, a circular arc segment, a parabolic segment, a hyperbolic segment, a segment of the expanded segment, or a
  • the above line segments are combined and arranged intermittently along the inner peripheral direction of the hollow passage.
  • the cross-sectional dimensions of the respective axial positions of the nozzles are equal in axial section size, or are proportionally enlarged or scaled down.
  • the cross-sectional shape of the transition section is circular, and the circular cross-sectional dimensions at the respective axial positions of the transition section are equal in axial section size, or are equally enlarged or scaled down.
  • the pulsating airflow damper device provided by the invention will be sprayed by the inlet airflow through the transition section, forming a complex vortex structure in the airflow expansion space, turning the pulsating airflow into a stable airflow, and then entering the subsequent pipeline from the air outlet.
  • the invention changes the gas path in the pipe system and its accessory equipment
  • Figure 1 is a schematic view showing the structure of the apparatus of the present invention.
  • Figure 2 - Figure 5 is a schematic view showing the cross-sectional shape of the nozzle of the present invention.
  • Figure 6 is a schematic illustration of a length of piping system for calculating the natural frequency of the machine in a specific embodiment.
  • Figure 7 is a schematic diagram of a section of a pipe system for calculating the natural frequency of a gas column in a specific embodiment.
  • the pulsating airflow damper device of the present invention is mainly composed of an outer casing 4, an inner member and an airflow expansion space 6; the outer casing 4 is provided with an air inlet 1 and a subsequent pipeline communicating with the input airflow.
  • the inner member comprises a transition section 2 connected to the air inlet 1 and a nozzle 3 having a hollow passage and open at both ends; one end of the nozzle 3 is connected to the transition section 2, and the other end is expanded with the airflow
  • the space 6 is in communication, and the airflow expansion space 6 is constituted by a space formed between the inner member and the outer casing 4.
  • the cross-sectional shape of the nozzle 3 having a hollow passage and having both ends open, the outer shape of which is circular or triangular, rectangular, regular pentagon, and regular hexagon, wherein the inner circumference of the empty passage is circular or quadrangular or triangular Or a regular pentagon or a regular hexagon, having an outwardly extending groove on the inner periphery of the hollow passage, the groove being one or a kind of a straight line segment, a circular arc segment, a parabolic segment, a hyperbolic segment, and an expanded segment
  • the above line segments are combined and arranged intermittently along the inner peripheral direction of the hollow passage.
  • the cross-sectional shape of the nozzle has a circular outer shape, wherein the inner circumference of the hollow passage has a circular shape, and an outer extending groove is provided on the inner circumference of the hollow passage, that is, on the inner circumference of the hollow passage.
  • the groove is composed of a straight line segment and a circular arc segment, and is arranged intermittently along the inner circumferential direction.
  • the cross-sectional shape of the nozzle has a circular outer shape, wherein the inner circumference of the hollow passage has a circular shape, and an outer extending groove is provided on the inner circumference of the hollow passage, that is, on the inner circumference of the hollow passage.
  • the groove is composed of a combination of a circular arc segment and a parabolic segment, and is intermittently arranged along the inner circumferential direction.
  • the cross-sectional shape of the nozzle has a circular outer shape, wherein the inner circumference of the hollow passage has a circular shape, and an outer extending groove is provided on the inner circumference of the hollow passage, that is, on the inner circumference of the hollow passage.
  • the groove is composed of a straight line segment and a hyperbolic segment, and is arranged intermittently along the inner circumferential direction.
  • the cross-sectional shape of the nozzle has a circular outer shape, wherein the inner circumference of the hollow passage has a circular shape, and an outer extending groove is provided on the inner circumference of the hollow passage, that is, on the inner circumference of the hollow passage.
  • the groove is composed of a combination of a straight line segment and an unfolded line segment, and is intermittently arranged along the inner circumferential direction.
  • the cross-sectional dimensions of the respective axial positions of the nozzles are equal or proportionally enlarged or scaled down along the axial section.
  • the transition section has a circular shape, and the circular cross-sectional dimensions at the respective axial positions of the transition section are equal or evenly enlarged or scaled down along the axial section.
  • the input airflow enters through the air inlet 1 of the device, is ejected from the nozzle 3 through the transition section 2, enters the airflow expansion space 6, and forms a flow vortex, an extended vortex
  • the flow vortex system is a plurality of vortices whose intensity changes along the jet direction of the nozzle due to the velocity of the nozzle outlet section.
  • the vortex is due to the difference in velocity between the outflows in the nozzle outlet section, so that it is in the mixed shear layer. Due to the complex vortex structure such as a plurality of vortices formed by the entrainment action, the pulsating airflow is changed into a stable airflow, and then the air outlet 5 enters the subsequent duct.
  • Table 1 the mechanical natural frequency of the pipe segment
  • Table 1 the natural frequency of the gas column of the pipe segment

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pipe Accessories (AREA)

Abstract

L’invention concerne un dispositif réducteur de courant d’air pulsé et de vibrations comprenant un bâtiment extérieur, un composant intérieur et un espace allongé. L'enveloppe extérieure comporte un orifice d’entrée et un orifice de sortie. Le composant intérieur comporte une partie de transition et une tuyère. L’espace allongé se trouve entre le composant intérieur et la tuyère. Celle-ci comporte un passage et deux extrémités ouvertes, dont l’une est reliée à la partie de transition et l’autre communique avec l’espace allongé. La forme extérieure de la tuyère peut être ronde, triangulaire, rectangulaire, pentagonale ou hexagonale et la forme intérieure du passage peut être ronde, triangulaire, quadrangulaire, pentagonale ou hexagonale. Des rainures s’étendent depuis le cercle intérieur du passage vers l’extérieur. Le débit d’air, qui passe à travers la gaine de transition est expulsé sous forme de jet par la tuyère, forme une volute complexe dans l’espace allongé, ce qui change le débit d’air pulsé en un débit d’air stable, réduisant ainsi les vibrations.
PCT/CN2005/001363 2004-09-30 2005-08-30 Dispositif reducteur de courant d’air pulse et de vibrations WO2006034623A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200410060551.3 2004-09-30
CN 200410060551 CN1755070A (zh) 2004-09-30 2004-09-30 脉动气流消振装置

Publications (1)

Publication Number Publication Date
WO2006034623A1 true WO2006034623A1 (fr) 2006-04-06

Family

ID=36118566

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2005/001363 WO2006034623A1 (fr) 2004-09-30 2005-08-30 Dispositif reducteur de courant d’air pulse et de vibrations

Country Status (2)

Country Link
CN (1) CN1755070A (fr)
WO (1) WO2006034623A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104801435A (zh) * 2014-01-23 2015-07-29 刘友宏 菊花型喷嘴射水抽气器和喷射式混合器
CN105715327B (zh) * 2016-04-07 2018-06-26 北京化工大学 对喷式气流脉动衰减器
CN106335642B (zh) * 2016-09-27 2018-10-19 中国空气动力研究与发展中心高速空气动力研究所 一种基于环境气体喷流的武器舱噪声抑制装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87216191U (zh) * 1987-12-11 1988-07-27 北京机械工业管理学院 液体压力脉动消除器
JPH06191766A (ja) * 1992-12-28 1994-07-12 Hitachi Ltd 油圧マフラ
CN2289122Y (zh) * 1997-06-16 1998-08-26 广东美的集团股份有限公司 流体管路的消声装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87216191U (zh) * 1987-12-11 1988-07-27 北京机械工业管理学院 液体压力脉动消除器
JPH06191766A (ja) * 1992-12-28 1994-07-12 Hitachi Ltd 油圧マフラ
CN2289122Y (zh) * 1997-06-16 1998-08-26 广东美的集团股份有限公司 流体管路的消声装置

Also Published As

Publication number Publication date
CN1755070A (zh) 2006-04-05

Similar Documents

Publication Publication Date Title
RU2351775C2 (ru) Устройство выпуска отработанного газа транспортного средства
JP2008255987A (ja) ターボ機械の冷却及びシーリング空気システムのためのミキサ
KR100766806B1 (ko) 자동차용 배기구
JP2011208637A (ja) 排気ディフューザのためのシステム及び方法
CN203978561U (zh) 低流阻宽频带高效排气火星熄灭消声器
WO2006034623A1 (fr) Dispositif reducteur de courant d’air pulse et de vibrations
WO2002059522A1 (fr) Procede de reduction de la pression et de l'energie pulsatoire d'un fluide haute pression dans un conduit d'ecoulement et dispositif associe
CN212930540U (zh) 一种基于拉瓦尔喷管扩张段的涡流管
CN102434545A (zh) 液流脉动衰减器
CN203202508U (zh) 一种核电站用管道排气消声器
WO2022037126A1 (fr) Dispositif d'amortissement de pulsation de flux de gaz, et compresseur à vis équipé de celui-ci
CN104989622B (zh) 压缩机及其管系减振节能装置
CN202993509U (zh) 空调及其消声器
CN106475370A (zh) 便于实现焊后吹扫的管道结构
CN201461317U (zh) 往复式压缩机出口管道的整流消振装置
RU150274U1 (ru) Система выпуска в двигателе (варианты)
CN207598456U (zh) 一种用于大型往复压缩机的管道式主动气流脉动衰减装置
JP2018025191A (ja) 吸気口消音器
RU150646U1 (ru) Система выпуска в двигателе (варианты)
JP2013144979A (ja) ガスタービン用ディフューザ
CN101315071A (zh) 往复压缩机消振节能装置
JP2017057850A (ja) 消音要素及びカプラを有するサイレンサダクト
CN203453654U (zh) 渐缩管、有该渐缩管的制冷系统和具有该制冷系统的冰箱
CN108087239B (zh) 一种用于大型往复压缩机的管道式主动气流脉动衰减装置
CN107461964A (zh) 压缩机的排气管及空调器

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KM KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NG NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU LV MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 05781843

Country of ref document: EP

Kind code of ref document: A1