EP0444221A1 - Compresseur rotatif vertical - Google Patents

Compresseur rotatif vertical Download PDF

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Publication number
EP0444221A1
EP0444221A1 EP90103735A EP90103735A EP0444221A1 EP 0444221 A1 EP0444221 A1 EP 0444221A1 EP 90103735 A EP90103735 A EP 90103735A EP 90103735 A EP90103735 A EP 90103735A EP 0444221 A1 EP0444221 A1 EP 0444221A1
Authority
EP
European Patent Office
Prior art keywords
oil
shaft
oil groove
groove
closed tank
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.)
Withdrawn
Application number
EP90103735A
Other languages
German (de)
English (en)
Inventor
Hideki Kawai
Hiroshi Sasano
Toshihiko Ohta
Masahiko Osaka
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Refrigeration Co
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 Matsushita Refrigeration Co filed Critical Matsushita Refrigeration Co
Priority to EP90103735A priority Critical patent/EP0444221A1/fr
Publication of EP0444221A1 publication Critical patent/EP0444221A1/fr
Withdrawn legal-status Critical Current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
    • F04C29/02—Lubrication; Lubricant separation
    • F04C29/028—Means for improving or restricting lubricant flow

Definitions

  • the present invention relates to a vertical rotary compressor which is to be used in an air conditioner, a refrigerator or the like, and more particularly a lubrication oil feeding mechanism therefor.
  • FIG.3 is a cross-sectional side view showing the conventional vertical rotary compressor.
  • a motor 4 which comprises a stator 2 and a rotor 3 is arranged in a closed tank 1.
  • a compressor unit 15 which is operated by the motor 4 is also positioned in the closed tank 1.
  • the bottom of the closed tank 1 is used as an oil reservoir 1', which contains lubrication oil 5 therein.
  • Numeral 16 designates an interior hollow space in the closed tank 1.
  • a shaft 6 which is fixed to the rotor 3 of the motor 4 has an eccentric cam part 7, which is positioned in a compression room 9 of a cylinder 8.
  • the center of the compression room 9 which is formed in cylindrical shape is arranged co-centrically with the rotation axis of the shaft 6.
  • a first bearing 10a and a second bearing 10b are provided to closely contact the upper and the lower face of the cylinder 8, respectively, as shown in FIG.3.
  • a ring-shaped piston roller 12 slidably embraces on the eccentric cam part 7 and moves to roll contacting on a circular inner wall of the compression room 9.
  • a slide vane 13 which slidably contacts the surface of the piston roller 12 by a force of spring (not shown), partitions the compression room 9 into a low pressure room and a high pressure room, which are of suction side and discharge side, respectively.
  • a suction tube 20 with one end open in the low pressure room of the compression room 9 is fixed to the cylinder 8 by press-fitting. The other end of the suction tube 20 is connected to a low pressure side of a coolant circuit which is arranged on the outside area of the closed tank 1.
  • a discharge valve 21 which is a one way valve for preventing a back flow of the coolant is provided on the first bearing 10a.
  • a discharge muffler 22 which is mounted on the first bearing 10a has a discharging opening 23.
  • the opening 23 of the discharge muffler 22 is open in the interior hollow space 16 of the closed tank 1.
  • One end of a discharge tube 24 is open in the interior hollow space 16 of the closed tank 1, and the other end thereof is connected to a high pressure side of the above-mentioned coolant circuit.
  • An oil passage hole 30 is formed in the bottom end part of the shaft 6, extended on axis of the shaft 6.
  • An oil-feed fin 31 which is made by twisting a small piece of metal sheet is provided in the oil passage hole 30.
  • connection passage 33a is formed on the outer face of the eccentric cam part 7.
  • the connection passage 33a and the oil passage hole 30 are communicated through an oil-feed hole 33b, which is arranged at the circular wall of the oil passage hole 30.
  • An oil-feed groove 32 which is formed on an outer face of the shaft 6, is communicated with the oil passage hole 30 through a connection passage 33a.
  • One end 32a of the oil-feed groove 32 is open in the interior hollow space 16 of the closed tank 1.
  • the oil-feed fin 31 which is positioned in the oil passage hole 30 scoops up the lubrication oil 5 in the oil reservoir 1' as the shaft 6 rotates.
  • the lubrication oil in the oil passage hole 30 is brought upwards in the oil-feed groove 32 through the connection passage 33a.
  • the lubrication oil 5 is discharged from the upper end 32a of the oil-feed groove 32 out of upper brim of the bearing hub 10c into the interior hollow space 16 of the closed tank 1.
  • the oil-feed fin 31 is fixed to the oil passage hole 30 within the shaft 6 by the press-fit of oil-feed fin 31 in the oil passage hole 30. Accordingly, the oil-feed fin 31 and the oil passage hole 30 must be made in accurate shapes, and the production cost increases. If a size of the oil-feed fin 31 is larger than that designed, the oil-feed fin 31 can not be inserted into the oil passage hole 30 or distort the outside shape of the end part of the shaft 6, thereby hindering smooth rotation of the piston roller 12. On the contrary, if the size of the oil-feed fin 31 is smaller than that designed, it drops off during operation of the rotary compressor.
  • An object of the present invention is to offer a vertical rotary compressor which dispenses with an oil-feed fin, whereby conventional troubles caused by the oil-feed fin is eliminated.
  • the vertical rotary compressor of the present invention comprises: a closed tank having an oil reservoir at its bottom part; a shaft to be driven by a motor having
  • the substantially spiral lower oil groove on outside face of the lower extended part of the shaft brings up the lubrication oil to the upper oil groove through the connecting groove, which is formed on the outer circumference of the eccentric cam part.
  • the lubrication oil is certainly circulated to sufficiently lubricate the shaft.
  • FIG.1 is a cross-sectional side view showing a vertical rotary compressor of the present invention.
  • FIG.2 is a perspective view showing a shaft shown in FIG.1.
  • FIG.3 is a cross-sectional side view showing the conventional vertical rotary compressor.
  • FIG.1 is a cross-sectional side view showing a vertical rotary compressor of the present invention.
  • FIG.2 is a perspective view showing a shaft shown in FIG.1.
  • a motor 4 which comprises a stator 2 and a rotor 3 is arranged in a closed tank 1.
  • a compressor unit 15 which is operated by the motor 4 is also positioned in the closed tank 1.
  • the bottom of the closed tank 1 is used as an oil reservoir 1', which contains lubrication oil 5 therein.
  • Numeral 16 designates an interior hollow space in the closed tank 1.
  • a shaft 6 which is fixed to the rotor 3 of the motor 4 has an eccentric cam part 7, which is positioned in a compression room 9 of a cylinder 8.
  • the center of the compression room 9 which is formed in cylindrical shape is arranged co-centrically with the rotation center of the shaft 6.
  • a first bearing 10a and a second bearing 10b are provided to closely contact the upper and the lower face of the cylinder 8, respectively, as shown in FIG.1.
  • the height of the eccentric cam part 7 is selected such as to form gaps in the compression room 9, namely an upper gap between the lower face 11a of the first bearing 10a and the upper face 71 of the eccentric cam part 7, and a lower gap between the upper face 11b of the second bearing 10b and the lower face 72 of the eccentric cam part 7.
  • a ring-shaped piston roller 12 slidably embraces on the eccentric cam part 7 and moves to roll contacting on a circular wall of the compression room 9.
  • a slide vane 13 which slidably contacts the surface of the piston roller 12 by a face of spring (not shown), partitions the compression room 9 into a low pressure room and a high pressure room, which are of suction side and discharge side, respectively.
  • a suction tube 20 with one end open in the low pressure room of the compression room 9 is fixed to the cylinder 8 by press-fitting. The other end of the suction tube 20 is connected to a low pressure side of a coolant circuit which is arranged on the outside area of the closed tank 1.
  • a discharge valve 21 which is a one way valve for preventing a back flow of the coolant is provided on the first bearing 10a.
  • a discharge muffler 22 which is mounted on the first bearing 10a has a discharging opening 23.
  • the opening 23 of the discharge muffler 22 is open in the interior hollow space 16 of the closed tank 1.
  • One end of a discharge tube 24 is open in the interior hollow space 16 of the closed tank 1, and the other end thereof is connected to a high pressure side of the above-mentioned coolant circuit.
  • a lower oil groove 50 is formed in substantial spiral shape on the outer cylindrical surface of a lower extended part 53 of the shaft 6.
  • the lowest end 50a of the lower oil groove 50 is communicated with lubrication oil 5 at the lower part of a closed tank 1, that is in the oil reservoir 1'.
  • An upper oil groove 51 is formed in substantial spiral shape on an outer cylindrical surface of a principal shaft part 52.
  • the upper oil groove 51 is communicated with an interior hollow space 16 at the upper part of the closed tank 1.
  • a connecting groove 54 is formed substantially in parallel to the shaft 6 on an outer cylindrical surface of an eccentric cam part 7. Configuration of the spiral oil grooves 50, 51 are determined so as to generate pump-up action utilizing viscosity of lubrication oil 5 during forward-rotation.
  • the upper oil groove 51, the lower oil groove 50 and the connecting groove 54 are communicated as follows.
  • Two ring shaped recesses 541, 542 are made on the upper and lower sides of the eccentric cam part 7, respectively.
  • the upper ring shaped recess 541 is connected to the lower end 51b of the upper oil groove 51, and the lower ring shaped recess 542 is connected to the upper end 50b of the lower oil groove 50.
  • the rotation of the rotor 3 which is moved by a motor 4 is transmitted to the shaft 6.
  • the lubrication oil 5 is pumped up by the lower oil groove 50 from the lowes end 50a of the lower oil groove 50.
  • the lubrication oil 5 flows in the passage formed between the lower oil groove 50 and the inside face of the second bearing 10b, and reaches the upper end 50b of the lower oil groove 50.
  • the lubrication oil 5 flows in the connecting groove 54 of the eccentric cam part 7, along with the inner face of the piston roller 12. Further, the lubrication oil 5 is brought up from the lower end 51b of the upper oil groove 51, passes through the upper oil groove 51. And the lubrication oil 5 is discharged from the upper end 51a of the upper oil groove 51 out of upper brim of the bearing hub 10c into the interior hollow space 16 of the closed tank 1.
  • the vertical rotary compressor can pump up the lubrication oil 5 along the grooves 50, 54 and 51 formed outside the shaft 6. Since no oil-feed fin of the press-fitted twisted sheet is used, there is no fear of dropping out of the fin from the shaft or distorting the shape of the shaft.
EP90103735A 1990-02-26 1990-02-26 Compresseur rotatif vertical Withdrawn EP0444221A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP90103735A EP0444221A1 (fr) 1990-02-26 1990-02-26 Compresseur rotatif vertical

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90103735A EP0444221A1 (fr) 1990-02-26 1990-02-26 Compresseur rotatif vertical

Publications (1)

Publication Number Publication Date
EP0444221A1 true EP0444221A1 (fr) 1991-09-04

Family

ID=8203696

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90103735A Withdrawn EP0444221A1 (fr) 1990-02-26 1990-02-26 Compresseur rotatif vertical

Country Status (1)

Country Link
EP (1) EP0444221A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100334355C (zh) * 2002-12-25 2007-08-29 乐金电子(天津)电器有限公司 密闭型旋转式压缩机的旋转轴偏心凸轮缓冲结构
CN101943156A (zh) * 2010-09-27 2011-01-12 加西贝拉压缩机有限公司 应用于全封闭制冷压缩机的泵油结构
CN107542665A (zh) * 2017-08-22 2018-01-05 珠海凌达压缩机有限公司 曲轴及具有其的压缩机
JP2020037887A (ja) * 2018-09-03 2020-03-12 日立ジョンソンコントロールズ空調株式会社 密閉型電動圧縮機

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2764342A (en) * 1952-01-31 1956-09-25 Gen Electric Noise damping muffler

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2764342A (en) * 1952-01-31 1956-09-25 Gen Electric Noise damping muffler

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100334355C (zh) * 2002-12-25 2007-08-29 乐金电子(天津)电器有限公司 密闭型旋转式压缩机的旋转轴偏心凸轮缓冲结构
CN101943156A (zh) * 2010-09-27 2011-01-12 加西贝拉压缩机有限公司 应用于全封闭制冷压缩机的泵油结构
CN101943156B (zh) * 2010-09-27 2013-05-01 加西贝拉压缩机有限公司 应用于全封闭制冷压缩机的泵油结构
CN107542665A (zh) * 2017-08-22 2018-01-05 珠海凌达压缩机有限公司 曲轴及具有其的压缩机
JP2020037887A (ja) * 2018-09-03 2020-03-12 日立ジョンソンコントロールズ空調株式会社 密閉型電動圧縮機

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