US20180195512A1 - Rotary compressor - Google Patents

Rotary compressor Download PDF

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Publication number
US20180195512A1
US20180195512A1 US15/502,309 US201515502309A US2018195512A1 US 20180195512 A1 US20180195512 A1 US 20180195512A1 US 201515502309 A US201515502309 A US 201515502309A US 2018195512 A1 US2018195512 A1 US 2018195512A1
Authority
US
United States
Prior art keywords
rotary compressor
rotor core
compressor according
air hole
casing
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
US15/502,309
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English (en)
Inventor
Heng Yang
Jiansheng Liao
Danwei Liu
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.)
Guangdong Meizi Compressor Co Ltd
Guangdong Meizhi Compressor Co Ltd
Original Assignee
Guangdong Meizi Compressor 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 Guangdong Meizi Compressor Co Ltd filed Critical Guangdong Meizi Compressor Co Ltd
Assigned to GUANGDONG MEIZHI COMPRESSOR CO., LTD. reassignment GUANGDONG MEIZHI COMPRESSOR CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LIAO, JIANSHENG, LIU, DANWEI, YANG, HENG
Publication of US20180195512A1 publication Critical patent/US20180195512A1/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
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/06—Silencing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/06—Silencing
    • F04C29/068—Silencing the silencing means being arranged inside the pump housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F04C29/0085—Prime movers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/06—Silencing
    • F04C29/065—Noise dampening volumes, e.g. muffler chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/20—Rotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/40—Electric motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/13—Noise
    • F04C2270/135—Controlled or regulated

Definitions

  • the present disclosure relates to a field of compressor equipment, and more particularly to a rotary compressor.
  • Embodiments of the present disclosure seek to solve at least one of the problems existing in the related art to at least some extent. For that reason, a rotary compressor according to embodiments of the present disclosure is provided, which has low noise, simple and reasonable structure and the like advantages.
  • the rotary compressor includes a casing, an electric motor, and a compression mechanism, in which two ends of the casing in an axial direction have a first end wall and a second end wall respectively, the electric motor includes a stator core and a rotor core.
  • the largest distance between a side end face of the stator core adjacent to the first end wall and the first end wall is denoted by Dst, the compression mechanism is located at one side of the electric motor far away from the first end wall, the compression mechanism includes an air cylinder assembly and a main bearing.
  • the main bearing is connected to a side end face of the cylinder assembly adjacent to the electric motor, in the axial direction of the casing, the smallest distance between a side end face of the rotor core adjacent to the first end wall and a side end face of a flange portion of the main bearing adjacent to the first end wall is denoted by Drt.
  • Dst and Drt satisfy a relationship: 0.335 ⁇ Dst/Drt ⁇ 0.838.
  • the noise may be effectively reduced when the rotary compressor is working, thereby the rotary compressor having a simple and reasonable structure, easy assembly, low noise and the like advantages.
  • the Dst and Drt further satisfy a relationship: 0.568 ⁇ Dst/Drt ⁇ 0.680.
  • an air hole is formed on and throughout the rotor core, a central axis of the air hole is parallel to a rotation axis of the rotor core.
  • the air holes are axisymmetrically distributed about a first diameter of the rotor core, a width D of the air hole in a first diameter direction satisfies a relationship: 0.204 mm ⁇ D ⁇ 0.480 mm.
  • D further satisfies a relationship: 0.404 mm ⁇ D ⁇ 0.460 mm.
  • a contour of a cross section of the air hole is a curve or a combination of a curve and a straight line.
  • the cross section of the air hole in a rotation axis direction of the rotor core, has the same shape and dimension.
  • a plurality of air holes are provided and evenly spaced apart from one another along a circumferential direction of the rotor core.
  • each air hole has the same shape and dimension.
  • the rotor core is rotatably disposed inside the stator core.
  • FIG. 1 is a sectional view of a rotary compressor according to embodiments of the present disclosure
  • FIG. 2 is a schematic view of a rotor core according to an embodiment of the present disclosure from an axial direction;
  • FIG. 3 is a schematic view of a rotor core according to another embodiment of the present disclosure from an axial direction;
  • FIG. 4 is a schematic view of a rotor core according to a further embodiment of the present disclosure from an axial direction;
  • FIG. 5 is a curve diagram showing a relationship between a ratio of Dst/Drt and a noise level according to embodiments of the present disclosure
  • FIG. 6 is a curve diagram showing a relationship between a value of D and a noise level according to embodiments of the present disclosure.
  • casing 1 first casing 11 ; first end wall 111 ; middle casing 12 ; second casing 13 ; second end wall 131 ;
  • compression mechanism 3 air cylinder assembly 31 ; main bearing 32 ; flange portion 321 ;
  • crankshaft 4 crankshaft 4 .
  • a rotary compressor 100 may transform a low-temperature and low-pressure refrigerant to a high-temperature and high-pressure refrigerant.
  • the rotary compressor 100 may be configured as a vertical compressor or a horizontal compressor.
  • the rotary compressor 100 configured as the vertical compressor is used as an example to make the description.
  • the rotary compressor 100 includes a casing 1 , an electric motor 2 , a compression mechanism 3 and a crankshaft 4 .
  • the casing 1 may include a first casing 11 , a middle casing 12 and a second casing 13 .
  • the middle casing 12 may be cylindrical in shape, thereby the cylindrical middle casing 12 may define a certain accommodating space therein, facilitating parts (such as the electric motor 2 and the compression mechanism 3 shown in FIG. 1 ) inside the rotary compressor 100 to be mounted.
  • the first casing 11 (for example, an upper casing shown in FIG. 1 ) and the second casing 13 (for example, a lower casing shown in FIG. 1 ) are connected to the two ends of the middle casing 12 in the axial direction.
  • the first end wall 111 may be configured as a bottom wall of the first casing 11 and the second end wall 131 may be configured as a top wall of the second casing 13 .
  • any one of the first casing 11 and the second casing 13 may be integrated with the middle casing 12 .
  • the first casing 11 may be integrated with the middle casing 12 , thereby the middle casing 12 may be fixed to the second casing 13 when the parts are assembled, facilitating the assembly of the rotary compressor 100 and improving the production efficiency.
  • the second casing 13 may be integrated with the middle casing 12 , thereby the middle casing 12 may be fixed to the first casing 11 when the parts are assembled, completing the assembly of the rotary compressor 100 .
  • the electric motor 2 is disposed in the casing 1 and includes a stator core 21 and a rotor core 22 .
  • the largest distance between a side end face of the stator core 21 adjacent to the first end wall 111 and the first end wall 111 is denoted by Dst.
  • Dst the distance between an upper end face of the stator core 21 and the first end wall 111 .
  • the compression mechanism 3 is disposed in the casing 1 and is located at one side of the electric motor 2 far away from the first end wall 111 .
  • the compression mechanism 3 may be disposed below the electric motor 2 , so that the compression mechanism 3 is farther away from the first end wall 111 than the electric motor 2 is, to facilitate installation and fitting between the electric motor 2 and the compression mechanism 3 .
  • the compression mechanism 3 includes an air cylinder assembly 31 and a main bearing 32 .
  • the main bearing 32 is connected to a side end face of the cylinder assembly 31 (for example, an upper surface of the cylinder assembly 31 shown in FIG. 1 ) adjacent to the electric motor 2 , in the axial direction of the casing 1 (for example, the un-down direction shown in FIG. 1 ), the smallest distance between a side end face of the rotor core 22 adjacent to the first end wall 111 and a side end face of an flange portion 321 of the main bearing 32 adjacent to the first end wall 111 is denoted by Drt.
  • Drt the distance between an upper end face of the rotor core 22 and a top of the flange portion 321 of the main bearing 32 is Drt.
  • Dst and Drt satisfy a relationship: 0.335 ⁇ Dst/Drt ⁇ 0.838.
  • a horizontal coordinate in FIG. 5 represents a ratio of Dst/Drt and a vertical coordinate a in FIG. 5 represents a noise OA level when the rotary compressor 100 is working.
  • the noise OA level of the rotary compressor 100 during operation reduces to a certain extent first and then increases gradually.
  • the rotary compressor 100 may produce different noises, for example, when Dst/Drt is equal to 0.4, 0.45, 0.55, 0.6 or 0.75, the working noise of the rotary compressor 100 may be reduced effectively.
  • both the electric motor 2 and the compression mechanism 3 may be disposed coaxially with the casing 1 , that is to say, a central axis of the crankshaft 4 and a central axis of the casing 1 are coincident, thereby a rotation axis of the rotor core 22 being coincident with the central axis of the casing 1 , which means that both a central axis of the main bearing 32 and a central axis of the air cylinder assembly 31 are coincident with the central axis of the casing 1 , thus the structure of the rotary compressor 100 being simple and reasonable, and the assembly of the rotary compressor 100 being convenient.
  • the noise may be effectively reduced when the rotary compressor 100 is working, thereby the rotary compressor 100 having a simple and reasonable structure, easy assembly, low noise and the like advantages.
  • Dst and Drt further satisfy a relationship: 0.568 ⁇ Dst/Drt ⁇ 0.680.
  • Dst/Drt is equal to 0.58, 0.6 or 0.65
  • the working noise of the rotary compressor 100 is close to the minimum. It can be seen, by configuring the ratio of Dst/Drt of the rotary compressor 100 as: 0.568 ⁇ Dst/Drt ⁇ 0.680, the working noise of the rotary compressor 100 may be further reduced.
  • the high-temperature and high-pressure refrigerant discharged from the compression mechanism 3 may be transmitted upwardly, and an air hole 221 is formed on and throughout the rotor core 22 , thereby facilitating upward transmission of the high-temperature and high-pressure refrigerant and reducing the noise.
  • a central axis of the air hole 221 is parallel to the rotation axis of the rotor core 22 , for example, in the embodiment shown in FIG. 1 , the rotation axis of the rotor core 22 is in the up-down direction, thereby the central axis of the air hole 221 being in the up-down direction as well, thereby further facilitating the upward transmission of the high-temperature and high-pressure refrigerant and further reducing the noise effectively.
  • the air holes 221 are axisymmetrically distributed about a first diameter of the rotor core 22 , a width D of the air hole 221 in the first diameter direction satisfies: 0.204 mm ⁇ D ⁇ 0.480 mm.
  • the air holes 221 may be symmetrically disposed about the first diameter k of the rotor core 22 , and the width of the air hole 221 in the first diameter k is denoted by D.
  • a horizontal coordinate in FIG. 6 represents a value of D and a vertical coordinate a in FIG. 6 represents a noise OA level when the rotary compressor 100 is working.
  • the working noise of the rotary compressor 100 gradually reduces to a certain extent first and then increases gradually.
  • the rotary compressor 100 may produce different noises, for example, when D is equal to 0.25 mm, 0.35 mm or 0.41 mm, the working noise of the rotary compressor 100 may be reduced effectively.
  • D further satisfies a relationship: 0.404 mm ⁇ D ⁇ 0.460 mm, fox example when D is equal to 0.41 mm, 0.43 mm or 0.45 mm, the working noise of the rotary compressor 100 is close to the minimum. It can be seen, by configuring the value of D of the air hole 221 of the rotary compressor 100 as: 0.404 mm ⁇ D ⁇ 0.460 mm, the working noise of the rotary compressor 100 may be further reduced.
  • a contour of a cross section of the air hole 221 may be a curve or a combination of a curve and a straight line.
  • the cross section of the air hole 221 may be configured in the shape of a hollow curve (as shown in FIG. 2 ), or a circle (as shown in FIG. 3 ), as well as a rounded rectangle (as shown in FIG. 4 ), thereby facilitating circulation of the high-temperature and high-pressure refrigerant and reducing the working noise of the rotary compressor 100 .
  • the cross section of the air hole 221 may be configured in the shape of other curves or combinations of straight lines and curves, so as to meet the actual use requirements better.
  • the cross section of the air hole 221 has the same shape and dimension, thereby on one hand facilitating the process of the air hole 221 , reducing the production process complexity of the rotary compressor 100 , and on the other hand facilitating homogeneous circulation of the high-temperature and high-pressure refrigerant through the air hole 221 , further reducing the working noise of the rotary compressor 100 .
  • a plurality of air holes 221 may be provided and evenly spaced apart from one another along the circumferential direction of the rotor core 22 , that is to say, the plurality of air holes 221 are evenly spaced apart from one another along the circumferential direction of the rotor core 22 , thereby facilitating the process of the air hole 221 and the circulation of the high-temperature and high-pressure refrigerant.
  • each air hole 221 has the same shape and dimension, thereby facilitating the process of the air holes 221 , improving the homogeneous circulation of the high-temperature and high-pressure refrigerant, further reducing the working noise of the rotary compressor 100 .
  • the rotor core 22 may be rotatably disposed inside the stator core 21 .
  • a peripheral wall of the stator core 21 may be fixed to an inner circumferential wall of the casing 1
  • the rotor core 22 may be connected with a thermal sleeve of the crankshaft 4 , thereby improving the fitting stability between the electric motor 2 and the compression mechanism 3 effectively, and facilitating the assembly of the rotary compressor 100 .
  • the rotor core 22 may be rotatably disposed outside the stator core 21 as well.
  • first and second are used herein for purposes of description and are not intended to indicate or imply relative importance or significance or to imply the number of indicated technical features.
  • the feature defined with “first” and “second” may comprise one or more of this feature.
  • “a plurality of” means two or more than two, unless specified otherwise.
  • the terms “mounted,” “connected,” “coupled,” “fixed” and the like are used broadly, and may be, for example, fixed connections, detachable connections, or integral connections; may also be mechanical or electrical connections; may also be direct connections or indirect connections via intervening structures; may also be inner communications of two elements, which can be understood by those skilled in the art according to specific situations.
  • a structure in which a first feature is “on” or “below” a second feature may include an embodiment in which the first feature is in direct contact with the second feature, and may also include an embodiment in which the first feature and the second feature are not in direct contact with each other, but are contacted via an additional feature formed therebetween.
  • a first feature “on,” “above,” or “on top of” a second feature may include an embodiment in which the first feature is right or obliquely “on,” “above,” or “on top of” the second feature, or just means that the first feature is at a height higher than that of the second feature; while a first feature “below,” “under,” or “on bottom of” a second feature may include an embodiment in which the first feature is right or obliquely “below,” “under,” or “on bottom of” the second feature, or just means that the first feature is at a height lower than that of the second feature.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressor (AREA)
US15/502,309 2015-09-24 2015-09-24 Rotary compressor Abandoned US20180195512A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2015/090608 WO2017049545A1 (zh) 2015-09-24 2015-09-24 旋转式压缩机

Publications (1)

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US20180195512A1 true US20180195512A1 (en) 2018-07-12

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US15/502,309 Abandoned US20180195512A1 (en) 2015-09-24 2015-09-24 Rotary compressor

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US (1) US20180195512A1 (ja)
EP (1) EP3354902B1 (ja)
JP (1) JP2017531755A (ja)
WO (1) WO2017049545A1 (ja)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020051715A1 (en) * 2000-05-31 2002-05-02 Kenzo Matsumoto Motor compressor and cooling apparatus using the same
US20100061868A1 (en) * 2007-02-22 2010-03-11 Daikin Industries, Ltd. Motor and compressor

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JP3395539B2 (ja) * 1996-09-18 2003-04-14 ダイキン工業株式会社 回転式圧縮機
JP2002295380A (ja) * 2001-03-29 2002-10-09 Mitsubishi Electric Corp 横形スクロール圧縮機
CN100383399C (zh) * 2003-12-12 2008-04-23 乐金电子(天津)电器有限公司 降低密封型旋转式压缩机噪音的遮蔽装置
CN1896528A (zh) * 2005-07-13 2007-01-17 乐金电子(天津)电器有限公司 具有两端支撑型旋转轴的旋转压缩机
US8740584B2 (en) * 2008-08-05 2014-06-03 Mitsubishi Electric Corporation Induction motor and hermetic compressor
JP4687810B2 (ja) * 2009-03-31 2011-05-25 株式会社富士通ゼネラル 電動機ロータ
JP5591099B2 (ja) * 2010-12-28 2014-09-17 三菱電機株式会社 圧縮機および冷凍サイクル装置
JP5786030B2 (ja) * 2011-10-31 2015-09-30 東芝キヤリア株式会社 密閉型回転式圧縮機と冷凍サイクル装置
CN104776029A (zh) * 2015-04-16 2015-07-15 广东美芝制冷设备有限公司 旋转式压缩机
CN104929938A (zh) * 2015-06-09 2015-09-23 安庆卡尔特压缩机有限公司 一种旋转式压缩机

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020051715A1 (en) * 2000-05-31 2002-05-02 Kenzo Matsumoto Motor compressor and cooling apparatus using the same
US20100061868A1 (en) * 2007-02-22 2010-03-11 Daikin Industries, Ltd. Motor and compressor

Also Published As

Publication number Publication date
EP3354902A4 (en) 2019-05-29
WO2017049545A1 (zh) 2017-03-30
EP3354902B1 (en) 2024-05-01
EP3354902A1 (en) 2018-08-01
JP2017531755A (ja) 2017-10-26

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