EP2295807B1 - Compresseur rotatif - Google Patents

Compresseur rotatif Download PDF

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Publication number
EP2295807B1
EP2295807B1 EP10168758.0A EP10168758A EP2295807B1 EP 2295807 B1 EP2295807 B1 EP 2295807B1 EP 10168758 A EP10168758 A EP 10168758A EP 2295807 B1 EP2295807 B1 EP 2295807B1
Authority
EP
European Patent Office
Prior art keywords
pump
vane
pump case
housing
pump vane
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.)
Not-in-force
Application number
EP10168758.0A
Other languages
German (de)
English (en)
Other versions
EP2295807A3 (fr
EP2295807A2 (fr
Inventor
Masaki Fujino
Junya Tanaka
Taku Morishita
Kenshi Ueda
Naoya Morozumi
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.)
Fujitsu General Ltd
Original Assignee
Fujitsu General 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 Fujitsu General Ltd filed Critical Fujitsu General Ltd
Publication of EP2295807A2 publication Critical patent/EP2295807A2/fr
Publication of EP2295807A3 publication Critical patent/EP2295807A3/fr
Application granted granted Critical
Publication of EP2295807B1 publication Critical patent/EP2295807B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F04C29/02—Lubrication; Lubricant separation
    • F04C29/025—Lubrication; Lubricant separation using a lubricant pump
    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
    • F04C18/3562—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member the inner and outer member being in contact along one line or continuous surfaces substantially parallel to the axis of rotation
    • F04C18/3564—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member the inner and outer member being in contact along one line or continuous surfaces substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
    • 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
    • F04C2230/00—Manufacture
    • F04C2230/60—Assembly methods

Definitions

  • a conventional rotary compressor is provided with a motor and a compressing unit in the sealed housing.
  • the compressing unit is located below the motor and is driven by the motor.
  • the compressing unit includes a cylinder, an annular piston, and a vane.
  • the cylinder has an inlet and an outlet.
  • the annular piston is attached to an eccentric portion of the rotation shaft of the motor to form an operation chamber the volume of which is variable.
  • the vane moves in and out of the operation chamber from the cylinder and comes in contact with the annular piston, thereby partitioning the operation chamber into an inlet chamber and a compression chamber.
  • the annular piston revolves via the eccentric portion inside the cylinder. Accordingly, gas refrigerant is sucked into the operation chamber from the inlet. The gas refrigerant is compressed by reducing the volume of the operation chamber. When the pressure reaches a predetermined level, the compressed gas refrigerant is discharged from the outlet, then passes through a gap in the motor as high-pressure refrigerant, and is discharged out of the sealed housing.
  • lubricant oil is retained in the lower part of the sealed housing.
  • the lubricant oil is pumped up by an oil supply mechanism and is supplied to the compressing unit for lubrication.
  • Japanese unexamined utility model application publication No. H06-049791 discloses a conventional technology related to such an oil supply mechanism.
  • a hollow hole is formed in the core of a crankshaft.
  • a twisted pump vane is inserted in the hollow hole to pump up the lubricant oil.
  • the twisted pump vane is provided with a large width portion wider than the inner diameter of the hollow hole. When being inserted in the hollow hole of the crankshaft, the twisted pump vane presses the inner wall of the hollow hole with the large width portion and thus is reliably fixed.
  • the twisted pump vane is inserted into the hollow hole of the crankshaft, and then a pump case is inserted thereinto to cover the twisted pump vane.
  • the large width portion of the twisted pump vane comes in contact with a stepped portion of the crankshaft and the upper end of the pump case, and thereby the twisted pump vane is positioned.
  • the upper end of the pump case may tightly press the large width portion of the twisted pump vane and deform the twisted pump vane (the large width portion).
  • US 6,182,794 B1 shows an oil suction propeller structure for a hermetically sealed compressor including a rotor, a crankshaft pressure-inserted in the rotor, an oil guide piece pressure-inserted in a lower portion of the crankshaft, a lower wing fixedly inserted in the oil guide piece and soaked in an oil, an upper wing having a width thereof wider than that of the lower wing, and an intermediate portion extending from the lower wing and gradually broadening in width toward the upper wing.
  • a rotary compressor is defined in claim 1 and includes a hollow compressor housing, a compressing unit, a motor, and an oil supply mechanism.
  • the compressor housing is provided with an inlet and an outlet of refrigerant.
  • the compressing unit is located in the lower part of the compressor housing to compress refrigerant sucked in from the inlet.
  • the motor is located in the upper part of the compressor housing to drive the compressing unit through a rotation shaft.
  • the oil supply mechanism supplies lubricant oil retained in the lower part of the compressor housing to the sliding portion of the compressing unit through an oil supply hole of the rotation shaft.
  • the oil supply mechanism includes a housing hole, a pump case, and a pump vane.
  • the housing hole has an opening in the lower end of the rotation shaft and is communicated with the oil supply hole.
  • the pump case includes a lubricant oil inlet in the lower end and an opening in the upper end.
  • the pump case is configured to be fitted in the housing hole.
  • the pump vane has a plate-like shape and is housed in the housing hole and the pump case.
  • the pump vane includes at least one bulge forming a large width portion at the longitudinal center, which is locked by the upper inner surface of the pump case.
  • FIG. 1 is a vertical cross-sectional view of a rotary compressor according to an embodiment of the invention.
  • FIG. 2 is a cross-sectional view of a compressing unit of the rotary compressor taking along line II-II in FIG. 1 .
  • FIG. 3 is a cross-sectional view of an oil supply mechanism of the rotary compressor.
  • FIG. 4 is a cross-sectional view of the oil supply mechanism taking along line IV-IV in FIG. 3 .
  • FIG. 5 is a front view of a twisted pump vane of the rotary compressor before twisted.
  • FIG. 6 is a front view of the twisted pump vane after twisted.
  • the rotary compressor of the embodiment comprises a compressor housing 11, a compressing unit 12, a motor 13, and an oil supply mechanism 14.
  • the compressor housing 11 is a hollow sealed housing formed of a cylindrical housing body 21, a cover 22 above the housing body 21, and a bottom 23 fixed to the lower end of the housing body 21.
  • the compressing unit 12 is located in the lower part of the compressor housing 11. The compressing unit 12 compresses gas refrigerant sucked in, and thereby discharges it as high-pressure refrigerant.
  • the motor 13 is located in the upper part of the compressor housing 11.
  • the motor 13 includes a starter 31 and a rotor 32.
  • the starter 31 is shrink fit to the inner periphery of the compressor housing 11 to be fixed thereto.
  • the starter 31 is spaced apart from the center of the starter 31 by a predetermined distance, and is shrink fit to a rotation shaft 33 to be fixed thereto.
  • the rotation shaft 33 extends downward and is mechanically connected to the compressing unit 12.
  • the motor 13 drives the compressing unit 12 via the rotation shaft 33.
  • the oil supply mechanism 14 functions as an oil supply pump, and supplies lubricant oil retained in the lower part of the compressor housing 11 to the sliding portion of the compressing unit 12 through an oil supply hole 100 of the rotation shaft 33, which will be described later.
  • the compressing unit 12 comprises a first compressing unit 41 and a second compressing unit 51.
  • the first compressing unit 41 is located above the second compressing unit 51.
  • the first compressing unit 41 and the second compressing unit 51 are of basically the same configuration, and operate in a similar manner, and are arranged one on top of the other.
  • the first compressing unit 41 includes a short cylindrical first cylinder 42 at the outer periphery.
  • the first cylinder 42 has a circular first cylinder inner wall 42a that is formed concentric with the rotation shaft 33 of the motor 13.
  • Inside the first cylinder 42 (the first cylinder inner wall 42a) is a first annular piston 43 having a smaller outer diameter than the inner diameter of the first cylinder 42.
  • a first operation chamber (compression space) 44 is defined and formed.
  • the first operation chamber 44 is capable of compressing refrigerant sucked therein and discharges the compressed refrigerant.
  • a first vane groove 45 is formed from the first cylinder inner wall 42a along the radial direction over the height of the first cylinder 42.
  • a flat plate-like first vane 46 is fitted in the first vane groove 45.
  • the first vane 46 is supported and biased by a first spring (not illustrated) attached to the recess of the first vane groove 45 in a direction to protrude into the first operation chamber 44.
  • the first vane 46 is biased by the first spring in a direction to protrude from the first vane groove 45 into the first operation chamber 44, and the end is in contact with the outer periphery of the first annular piston 43. Accordingly, the first operation chamber 44 is partitioned by the first vane 46 into a first inlet chamber 44a and a first compression chamber 44b.
  • a back pressure guide passage 47 is formed to allow the recess of the first vane groove 45 to be communicated with the inside of the compressor housing 11 to apply a back pressure to the first vane 46 by the pressure of compressed refrigerant.
  • the first cylinder 42 is provided with a first inlet 48 that allows the first inlet chamber 44a to be communicated with the outside so that refrigerant can be sucked into the first inlet chamber 44a from the outside.
  • the second compressing unit 51 includes a short cylindrical second cylinder 52 at the outer periphery.
  • the second cylinder 52 has a circular second cylinder inner wall that is formed concentric with the rotation shaft 33 of the motor 13.
  • Inside the second cylinder 52 (the second cylinder inner wall) is a second annular piston 53 having a smaller outer diameter than the inner diameter of the second cylinder 52.
  • a second operation chamber (compression space) 54 is defined and formed.
  • the second operation chamber 54 is capable of compressing refrigerant sucked therein and discharges the compressed refrigerant.
  • a second vane groove (not illustrated) is formed from the second cylinder inner wall along the radial direction over the height of the second cylinder 52.
  • a flat plate-like second vane (not illustrated) is fitted in the second vane groove.
  • the second vane is supported and biased by a second spring (not illustrated) attached to the recess of the second vane groove in a direction to protrude into the second operation chamber 54.
  • the second vane is biased by the second spring in a direction to protrude from the second vane groove into the second operation chamber 54, and the end is in contact with the outer periphery of the second annular piston 53. Accordingly, the second operation chamber 54 is partitioned by the second vane into a second inlet chamber 54a and a second compression chamber 54b.
  • a back pressure guide passage is formed to allow the recess of the second vane groove to be communicated with the inside of the compressor housing 11 to apply a back pressure to the second vane by the pressure of compressed refrigerant.
  • the second cylinder 52 is provided with a second inlet (not illustrated) that allows the second inlet chamber 54a to be communicated with the outside so that refrigerant can be sucked into the second inlet chamber 54a from the outside.
  • a partition 61 is placed between the first cylinder 42 and the second cylinder 52 so that the first compressing unit 41 and the second compressing unit 51 operate independently in the compressing unit 12.
  • the partition 61 is arranged to define the first operation chamber 44 and the second operation chamber 54.
  • An upper end plate 62 is arranged above the first cylinder 42 to close the first operation chamber 44.
  • a lower end plate 63 is arranged below the second cylinder 52 to close the second operation chamber 54.
  • the upper end plate 62, the first cylinder 42, the partition 61, the second cylinder 52, and the lower end plate 63 are in this order from the top to the bottom, and are integrally fixed by a fixing bolt (not illustrated).
  • the outer periphery of the upper end plate 62 is fitted and fixed to the inner periphery of the compressor housing 11.
  • An upper bearing 62a is formed at the center of the upper end plate 62.
  • the upper bearing 62a rotatably supports the rotation shaft 33.
  • a lower bearing 63a is formed at the center of the lower end plate 63.
  • the lower bearing 63a rotatably supports the rotation shaft 33.
  • the upper end plate 62 is provided with a plurality of arc long through holes 62b that are formed at regular intervals in the circumference direction at the outer periphery. Through the through holes 62b, lubricant oil mixed with refrigerant in the compressing unit 12 and discharged above the compressor housing 11 is separated from the refrigerant and returns to the lower part of the compressor housing 11.
  • the rotation shaft 33 is provided on the end side (the lower side) with a first eccentric portion 64 and a second eccentric portion 65, the phase of which is shifted by 180° to be eccentric.
  • the first eccentric portion 64 is slidably fitted to the inside of the first annular piston 43 of the first compressing unit 41 and is rotatable.
  • the second eccentric portion 65 is slidably fitted to the inside of the second annular piston 53 of the second compressing unit 51 and is rotatable.
  • the first and second eccentric portions 64 and 65 integrally rotate.
  • the first and second annular pistons 43 and 53 revolve and rotate. That is, when the rotation shaft 33 rotates clockwise in FIG. 2 , the first eccentric portion 64 rotates in the same direction while sliding against the first annular piston 43.
  • the first annular piston 43 rotates counterclockwise in FIG. 2 so that the first piston outer wall 43a moves along the first cylinder inner wall 42a while rotating, and also revolves clockwise in FIG. 2 .
  • the second eccentric portion 65 rotates in the same direction, and the second annular piston 53 rotates and revolves.
  • first and second annular pistons 43 and 53 rotate and revolve, along with the movement of them, the first vane 46 and the second vane (not illustrated) move back and forth. Accordingly, along with the movement of the first and second annular pistons 43 and 53, the volume of the first inlet chamber 44a, the second inlet chamber 54a, the first compression chamber 44b, and the second compression chamber 54b continuously changes. As a result, the first compressing unit 41 and the second compressing unit 51 continuously suck in refrigerant and compress it, thereby discharging the compressed refrigerant.
  • An upper muffler cover 66 is fixed on the upper end plate 62 such that an upper muffler chamber 67 is formed between the upper end plate 62 and the upper muffler cover 66.
  • Formed in the upper end plate 62 is a first outlet 68 that allows the first compression chamber 44b of the first cylinder 42 to be communicated with the upper muffler chamber 67.
  • the first outlet 68 is provided with a first outlet valve 69 that prevents the backflow of compressed refrigerant.
  • the upper muffler chamber 67 reduces the pressure pulsation of discharged refrigerant.
  • a lower muffler cover 70 is fixed to the bottom of the lower end plate 63 such that a lower muffler chamber 71 is formed between the lower end plate 63 and the lower muffler cover 70.
  • a second outlet 72 Formed in the lower end plate 63 is a second outlet 72 that allows the second compression chamber 54b of the second cylinder 52 to be communicated with the lower muffler chamber 71.
  • the second outlet 72 is provided with a second outlet valve 73 that prevents the backflow of compressed refrigerant.
  • the lower muffler chamber 71 reduces the pressure pulsation of discharged refrigerant.
  • first and second through holes are formed to be separated from each other in the axial direction.
  • an accumulator 81 formed of an independent cylindrical sealed housing is supported by an accumulator holder (not illustrated) and an accumulator band 82.
  • the top of the accumulator 81 is connected to a system connecting pipe 83 connected to the low pressure side of the refrigeration cycle.
  • the bottom of the accumulator 81 is connected to an end of a first inlet pipe 84 and a second inlet pipe 85.
  • the first inlet pipe 84 and the second inlet pipe 85 extend through the first and second through holes of the compressor housing 11, and the other end thereof is connected to each of the first inlet 48 and the second inlet (not illustrated) of the first cylinder 42 and the second cylinder 52 in the first compressing unit 41 and the second compressing unit 51.
  • the compressor housing 11 is connected to an outlet pipe 86 that is connected to the high pressure side of the refrigeration cycle to discharge high pressure refrigerant to the high pressure side of the refrigeration cycle. That is, the first outlet 68 and the second outlet 72 are communicated with the high pressure side of the refrigeration cycle via the outlet pipe 86.
  • Lubricant oil is retained in the lower part of the compressor housing 11.
  • the oil supply mechanism 14 supplies the lubricant oil to the sliding portion of the compressing unit 12 through the oil supply hole 100 of the rotation shaft.
  • the oil supply mechanism 14 comprises a housing hole 101, a pump case 102, and a pump vane 103.
  • the housing hole 101 is formed in the bottom of the rotation shaft 33 and has an opening in the lower end.
  • a through hole 104 is formed in the top of the rotation shaft 33.
  • the through hole 104 has an opening in the upper end and is communicated with the housing hole 101.
  • a horizontal hole 105 is formed that passes through in the redial direction to be communicated with the housing hole 101.
  • the oil supply hole 100 includes the housing hole 101, the through hole 104, and the horizontal hole 105.
  • the horizontal hole 105 is provided correspondingly to the upper bearing 62a, the first annular piston 43, the second annular piston 53, and the lower bearing 63a.
  • the pump case 102 is a cylindrical pipe in the lower end of which is formed a lubricant oil inlet 106 having the inner diameter as a small diameter.
  • the pump case 102 has an opening in the upper end and is fitted in the housing hole 101.
  • the pump vane 103 is of a plate-like shape and is housed in the housing hole 101 and the pump case 102.
  • the pump vane 103 is provided with a large width portion 107 at the center in the longitudinal direction. The large width portion 107 is locked by the upper inner surface of the pump case 102.
  • the housing hole 101 formed in the rotation shaft 33 comprises a housing hole main body 101a, a stepped portion 101b, and an attachment hole 101c.
  • the attachment hole 101c is located below the housing hole main body 101a with the stepped portion 101b therebetween and has a diameter slightly larger than that of the housing hole main body 101a.
  • the upper end portion of the pump case 102 is fitted in the attachment hole 101c of the housing hole 101 and is in contact with the stepped portion 101b, and thereby the pump case 102 is positioned.
  • the pump case 102 is press-fitted into the attachment hole 101c to be fixed to the rotation shaft 33.
  • a press fitting margin is set to 0 to 0.06 mm between the pump case 102 and the attachment hole 101c.
  • the inner diameter of the housing hole main body 101a is substantially the same as that of the pump case 102.
  • the pump case 102 is deformable at least in the radial direction.
  • the pump case 102 is made of copper, and thus is a little elastically deformable.
  • the pump vane 103 is twisted by a predetermined degree, 180°in the embodiment, in the circumference direction.
  • a plate 201 having a predetermined length L and a predetermined width W is provided with bulges 202a and 202b formed over a region L1 of a predetermined length at the center in the longitudinal direction.
  • the bulges 202a and 202b extend from both sides 203a and 203b of a portion of the plate 201 in the predetermined width W, respectively, in the width direction by a predetermined length W1.
  • inclined portions 204a and 204b are formed, respectively.
  • the inclined portions 204a and 204b are inclined at a predetermined angle ⁇ .
  • the inclined portions 204a and 204b are formed on both sides of the bulges 202a and 202b, respectively.
  • curved portions 205 are formed at the four corners of the plate 201.
  • the curved portions 205 each have a predetermined radius R.
  • the inclined portions 204a and 204b, and the curved portions 205 may be formed when press work is performed on the plate 201.
  • the inclined portions 204a and 204b, and the curved portions 205 may be also formed by chamfering the corners of the plate 201 or by barrel polishing after the press work.
  • the plate 201 thus formed is twisted 180° to form the pump vane 103 as illustrated in FIG. 6 .
  • the pump vane 103 is longitudinally symmetrical about the large width portion 107 formed at the center in the longitudinal direction.
  • the twisted pump vane 103 is processed such that the width of the large width portion 107 is equal to or wider than the inner diameter of the pump case 102.
  • the large width portion 107 is press-fitted into the pump case 102, and the pump vane 103 is fixed by the inner periphery of the pump case 102.
  • a press fitting margin is set to 0 to 0.5 mm between the large width portion 107 of the pump vane 103 and the pump case 102.
  • the pump vane 103 is made of an inexpensive elastically deformable material such as carbon steel for tools (i.e., spring steel) and cold rolled steel. Therefore, the pump vane 103 is deformable in the twisted direction.
  • the pump vane 103 (the large width portion 107) is press-fitted into the pump case 102, it is deformed in the twisted direction and is fixed.
  • the angle ⁇ of the inclined portions 204a and 204b of the pump vane 103 is set to 10° to 45°.
  • the pump vane 103 need not necessarily twisted 180°, and may be twisted by different degrees appropriately set.
  • the large width portion 107 may be formed by providing a bulge to only one side of the pump vane 103 in the width direction.
  • the inclined portions 204a and 204b need not necessarily be straight lines, and may be curved lines, i.e., arcs that allow the sides 203a and 203b and the bulges 202a and 202b to smoothly continue, respectively.
  • the pump vane 103 is press-fitted into the pump case 102 and is fixed. Then, the pump case 102 to which the pump vane 103 is fixed is press-fitted into the housing hole 101 of the rotation shaft 33 and is fixed.
  • the pump vane 103 When the large width portion 107 of the pump vane 103 is press-fitted into the pump case 102, the pump vane 103 is elastically deformed in the twisted direction, and the diameter is reduced. On the other hand, the pump case 102 is elastically deformed in the radial direction, and the diameter is increased. This reduces the force required to press-fit the pump vane 103 (the large width portion 107) into the pump case 102, resulting in less dust produced by the rubbing of the large width portion 107 and the pump case 102.
  • the pump vane 103 is made of a material such as carbon steel for tools and cold rolled steel and is elastically deformable.
  • the pump vane 103 can be press-fitted into the pump case 102 with a small hand press, and the assembly can be easily and reliably performed through press fitting.
  • the pump case 102 to which the pump vane 103 is fixed is press-fitted into the housing hole 101 of the rotation shaft 33, the elastically deformed pump case 102 with an increased diameter recovers to the original state.
  • the pump vane 103 is held tightly by the pump case 102 and is secured.
  • the longitudinal end portion (the corners of the flat portion 103b) of the pump vane 103 housed in the pump case 102 comes in contact with the inner surface of the pump case 102, and thereby the pump vane 103 is positioned.
  • the pump case 102 to which the pump vane 103 is fixed is press-fitted into the housing hole 101 of the rotation shaft 33, the end portion of the pump case 102 comes in contact with the stepped portion 101b, and thereby the pump case 102 is positioned.
  • the longitudinal end portion (the corners of the flat portion 103a) of the pump vane 103 housed in the housing hole 101 is separate from the inner surface of the housing hole 101.
  • the lubricant oil After lubricating the components, the lubricant oil enters into the first operation chamber 44 and the second operation chamber 54 through a small gap between components that define the first compressing unit 41 and the second compressing unit 51.
  • the lubricant oil lubricates the sliding portions of the respective components and provides pressure sealing to the small gap. Thereafter, the lubricant oil is discharged.
  • the rotation shaft 33 is driven by the motor 13 and rotates.
  • the first and second eccentric portions 64 and 65 the first and second annular pistons 43 and 53 revolve and rotate.
  • the volume of the first inlet chamber 44a and the second inlet chamber 54a increases. Accordingly, the gas refrigerant in the accumulator 81 is sucked into the first inlet chamber 44a and the second inlet chamber 54a via the first inlet pipe 84, the second inlet pipe 85, the first inlet 48, and the second inlet (not illustrated).
  • the first inlet chamber 44a and the second inlet chamber 54a are shut off from the first inlet 48 and the second inlet (not illustrated).
  • the first inlet chamber 44a and the second inlet chamber 54a switch to the first compression chamber 44b and the second compression chamber 54b, respectively, to compress the gas refrigerant.
  • the first outlet valve 69 and the second outlet valve 73 are opened.
  • the compressed refrigerant is discharged through the first outlet 68 and the second outlet 72 into the upper muffler chamber 67 and the lower muffler chamber 71.
  • the upper muffler chamber 67 and the lower muffler chamber 71 reduce the pressure pulsation of the refrigerant that causes noise.
  • the refrigerant is then discharged into the compressor housing 11 as high pressure refrigerant.
  • the high pressure refrigerant flows through the core cutout (not illustrated) of the starter 31 of the motor 13, and a gap between the core and a winding.
  • the high pressure refrigerant is sent to the upper part of the motor 13, and is discharged to the high pressure side of the refrigeration cycle through the outlet pipe 86.
  • the lubricant oil retained in the lower part of the compressor housing 11 is pumped up by the oil supply mechanism 14 to lubricate the upper bearing 62a, the first annular piston 43, the second annular piston 53, the lower bearing 63a, and the like. More specifically, the pump case 102 and the pump vane 103 rotate with the rotation shaft 33, the lubricant oil is pumped up by the centrifugal force in the housing hole 101, and is supplied to the upper bearing 62a, the first annular piston 43, the second annular piston 53, the lower bearing 63a, and the like through the horizontal hole 105 to lubricate them. After lubricating the components, the lubricant oil is sent back to the lower part of the compressor housing 11.
  • the rotary compressor comprises the compressing unit 12, the motor 13, and the oil supply mechanism 14.
  • the compressing unit 12 compresses refrigerant sucked in the lower part of the compressor housing 11.
  • the motor 13 is located above the compressor housing 11 and drives the compressing unit 12 through the rotation shaft 33.
  • the oil supply mechanism 14 supplies lubricant oil retained in the lower part of the compressor housing 11 to the sliding portion of the compressing unit 12 through the oil supply hole 100 of the rotation shaft 33.
  • the oil supply mechanism 14 comprises the housing hole 101, the pump case 102, and the pump vane 103.
  • the housing hole 101 formed in the bottom of the rotation shaft 33 has an opening in the lower end, and is communicated with the oil supply hole 100.
  • the pump case 102 is provided with the lubricant oil inlet 106 in the lower end and an opening in the upper end, and is fitted in the housing hole 101.
  • the pump vane 103 is of a plate-like shape and is housed in the housing hole 101 and the pump case 102.
  • the pump vane 103 is provided with the large width portion 107 at the longitudinal center. The large width portion 107 is locked by the upper inner surface of the pump case 102.
  • the pump vane 103 is locked by the upper inner surface of the pump case 102 through the large width portion.
  • the pump case 102 is fitted in the housing hole 101 of the rotation shaft 33.
  • the pump vane 103 is placed in the oil supply hole 100 of the rotation shaft 33. Accordingly, when the pump case 102 is fitted in the housing hole 101, the pump vane 103 does not touch the housing hole 101. This prevents the deformation of the pump vane 103 and improves the assembly efficiency.
  • the longitudinal end portion of the pump vane 103 housed in the pump case 102 comes in contact with the inner surface of the pump case 102, and thereby the pump vane 103 is positioned.
  • the pump vane 103 is positioned at a predetermined location relative to the pump case 102. Accordingly, the pump vane 103 is easily positioned at a predetermined location in the housing hole 101 by only fitting the pump case 102 in the housing hole 101. This improves the assembly efficiency.
  • the longitudinal end portion of the pump vane 103 housed in the housing hole 101 is separate from the inner surface of the housing hole 101. That is, the pump vane 103 is in contact with the pump case 102 at one end to be positioned, and is separate from the housing hole 101 at the other end. Therefore, excessive stress is not placed on the pump vane 103. Thus, it is possible to prevent the deformation or damage of the pump vane 103 and increase the durability.
  • the housing hole 101 comprises the housing hole main body 101a, the stepped portion 101b, and the attachment hole 101c having a larger diameter.
  • the upper end portion of the pump case 102 is fitted in the attachment hole 101c and is in contact with the stepped portion 101b, and thereby the pump case 102 is positioned.
  • the pump vane 103 is positioned with respect to the housing hole 101. This eliminates the need to directly position the pump vane 103.
  • the bulges 202a and 202b are formed at the longitudinal center of the pump vane 103 to extend outward.
  • the bulges 202a and 202b form the large width portion 107 having a width equal to or wider than the inner diameter of the pump case 102. Since the large width portion 107 is formed in such a simple manner, the manufacturing cost can be reduced.
  • the inclined portions 204a and 204b are formed between the bulges 202a and 202b and the sides 203a and 203b of the pump vane 103, respectively.
  • the large width portion (the bulges 202a and 202b) is fitted from the sides 203a and 203b through the inclined portions 204a and 204b.
  • the pump vane 103 can be smoothly fitted into the pump case 102. This reduces dust produced by rubbing in the pump case 102 and the pump vane 103 as well as preventing damage to them.
  • the pump vane 103 is twisted by a predetermined degree in the circumference direction and is made of a material that allows the pump vane 103 to be elastically deformable in the twisted direction. Accordingly, when fitted into the pump case 102, the pump vane 103 is elastically deformed in the twisted direction. Thus, the pump vane 103 can be smoothly fitted into the pump case 102.
  • the pump case 102 is deformable at least in the radial direction. Accordingly, when the pump vane 103 is fitted into the pump case 102, the pump case 102 is deformed so that the pump vane 103 can be smoothly fitted into the pump case 102. After that, when the pump case 102 is fitted in the housing hole 101, the elastically deformed pump case 102 recovers to the original state. Thus, the pump vane 103 can be fixed securely to the pump case 102.
  • the large width portion 107 i.e., the bulges 202a and 202b, the sides 203a and 203b, the inclined portions 204a and 204b, and the curved portions 205, is formed such that the pump vane 103 is point-symmetrical about the center. Therefore, the direction in which the pump vane 103 is fitted into the pump case 102 is not restricted, which improves the assembly efficiency.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressor (AREA)

Claims (7)

  1. Compresseur rotatif comprenant :
    - un boîtier de compresseur creux (11) agencé avec une entrée (48) et une sortie (68, 72) de réfrigérant ;
    - une unité de compression (12) située dans une partie inférieure du boîtier de compresseur (11) pour comprimer le réfrigérant aspiré depuis l'entrée (48) ;
    - un moteur (13) situé dans une partie supérieure du boîtier de compresseur (11) pour entraîner l'unité de compression (12) par le biais d'un arbre de rotation (33) ; et
    - un mécanisme d'alimentation en huile (14) qui fournit l'huile de lubrification retenue dans une partie inférieure du boîtier de compresseur (11) à une partie coulissante de l'unité de compression (12) à travers un trou d'alimentation en huile (100) de l'arbre de rotation (33), dans lequel :
    - le mécanisme d'alimentation en huile (14) comprend :
    -- un trou de boîtier (101) avec une ouverture dans une extrémité inférieure de l'arbre de rotation (33) et qui communique avec le trou d'alimentation en huile (100),
    -- un carter de pompe (102) qui comprend une entrée d'huile de lubrification (106) dans une extrémité inférieure et une ouverture dans une extrémité supérieure, le carter de pompe (102) étant configuré pour correspondre au trou de boîtier (101), et
    -- une pale de pompe (103) qui a une forme de plaque et est logée dans le trou de boîtier (101) et le carter de pompe (102),
    caractérisé en ce que :
    la pale de pompe (103) comprend au moins un renflement (202a, 202b) formant une grande partie de largeur (107) au niveau d'un centre longitudinal, qui est verrouillée par une surface interne supérieure du carter de pompe (102).
  2. Compresseur rotatif selon la revendication 1, dans lequel une partie d'extrémité longitudinale de la pale de pompe (103) logée dans le carter de pompe (102) est configurée pour être en contact avec une surface interne du carter de pompe (102) pour positionner la pale de pompe (103).
  3. Compresseur rotatif selon la revendication 2, dans lequel une partie d'extrémité longitudinale de la pale de pompe (103) logée dans le trou de boîtier (101) est séparée d'une surface interne du trou de boîtier (101).
  4. Compresseur rotatif selon l'une quelconque des revendications 1 à 3, dans lequel le centre longitudinal de la pale de pompe (103) se renfle dans au moins une direction de largeur afin de former le renflement (202a, 202b) qui permet à la grande partie de largeur (107) d'avoir une largeur égale ou plus large qu'un diamètre interne du carter de pompe (102).
  5. Compresseur rotatif selon la revendication 4, dans lequel une partie inclinée (204a, 204b) est formée entre le renflement (202a, 202b) et un côté (203a, 203b) de la pale de pompe (103).
  6. Compresseur rotatif selon l'une quelconque des revendications 1 à 5, dans lequel la pale de pompe (103) est vrillée selon un degré prédéterminé dans une direction circonférentielle et est réalisée avec un acier à ressort ou un acier laminé à froid.
  7. Compresseur rotatif selon l'une quelconque des revendications 1 à 6, dans lequel la pale de pompe (103) présente une symétrie ponctuelle autour du centre.
EP10168758.0A 2009-07-31 2010-07-07 Compresseur rotatif Not-in-force EP2295807B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009179690A JP4862925B2 (ja) 2009-07-31 2009-07-31 ロータリ圧縮機

Publications (3)

Publication Number Publication Date
EP2295807A2 EP2295807A2 (fr) 2011-03-16
EP2295807A3 EP2295807A3 (fr) 2016-11-02
EP2295807B1 true EP2295807B1 (fr) 2018-08-15

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EP10168758.0A Not-in-force EP2295807B1 (fr) 2009-07-31 2010-07-07 Compresseur rotatif

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US (1) US20110027117A1 (fr)
EP (1) EP2295807B1 (fr)
JP (1) JP4862925B2 (fr)
CN (1) CN101988504B (fr)
AU (1) AU2010202892C1 (fr)

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Also Published As

Publication number Publication date
JP4862925B2 (ja) 2012-01-25
CN101988504A (zh) 2011-03-23
EP2295807A3 (fr) 2016-11-02
AU2010202892B2 (en) 2015-09-17
CN101988504B (zh) 2015-04-29
AU2010202892C1 (en) 2016-03-03
JP2011032933A (ja) 2011-02-17
US20110027117A1 (en) 2011-02-03
EP2295807A2 (fr) 2011-03-16
AU2010202892A1 (en) 2011-02-17

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