WO2003074871A1 - Compresseur ferme - Google Patents
Compresseur ferme Download PDFInfo
- Publication number
- WO2003074871A1 WO2003074871A1 PCT/JP2003/002090 JP0302090W WO03074871A1 WO 2003074871 A1 WO2003074871 A1 WO 2003074871A1 JP 0302090 W JP0302090 W JP 0302090W WO 03074871 A1 WO03074871 A1 WO 03074871A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- casing
- compression element
- stator core
- hermetic compressor
- fixing member
- Prior art date
Links
Classifications
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- 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
-
- 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
- F04C18/32—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 both the movement defined in group F04C18/02 and relative reciprocation between the co-operating members
- F04C18/324—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 both the movement defined in group F04C18/02 and relative reciprocation between the co-operating members with vanes hinged to the inner member and reciprocating with respect to the outer member
- F04C18/328—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 both the movement defined in group F04C18/02 and relative reciprocation between the co-operating members with vanes hinged to the inner member and reciprocating with respect to the outer member and hinged to the outer member
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- 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
- F04C18/32—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 both the movement defined in group F04C18/02 and relative reciprocation between the co-operating members
- F04C18/332—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 both the movement defined in group F04C18/02 and relative reciprocation between the co-operating members with vanes hinged to the outer member and reciprocating with respect to the inner member
-
- 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
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- 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
- F04C2230/20—Manufacture essentially without removing material
- F04C2230/23—Manufacture essentially without removing material by permanently joining parts together
- F04C2230/231—Manufacture essentially without removing material by permanently joining parts together by welding
-
- 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
-
- 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
- F04C2240/80—Other components
- F04C2240/805—Fastening means, e.g. bolts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S417/00—Pumps
- Y10S417/902—Hermetically sealed motor pump unit
Definitions
- the present invention relates to a hermetic compressor, and more particularly to a measure for improving the reliability of fixing a compression element and its drive motor in a casing.
- the hermetic compressor in which the compression element and the drive motor were accommodated in the casing of the welding structure and hermetically closed was known. I have.
- This hermetic compressor has high reliability because the working fluid does not leak when compressing the working fluid and there is no danger of water intrusion.
- the hermetic compressor is provided in a refrigerant circuit of a refrigeration system. Used in air conditioners and the like.
- the compression element of the hermetic compressor has a structure that compresses a working fluid by being driven by a drive motor, and includes, for example, a cylinder and a rotary piston.
- the cylinder of the compression element is generally formed of rust, there is a problem that the joining strength between the casing and the compression element is insufficient.
- ⁇ iron has the property of low ductility and brittleness.
- welding of solids is liable to cause poor welding, for example, because the residual stress at the time of fabrication and the residual stress due to welding tend to cause cracks.
- the drive motor is generally fixed in the casing by shrink fitting, there is a problem that the joining strength between the casing and the drive motor is insufficient. That is, when the casing expands and deforms due to the internal pressure, the interference with the drive motor is reduced, and the bonding strength may be insufficient.
- a fluid with a very high pressure such as carbon dioxide
- the working fluid is used as the working fluid. If used, the compression deformation of the casing due to the internal pressure increases, which may cause the welding of the compression element to come off or the drive motor to be displaced, reducing the reliability of fixing the storage components. Occurs.
- an object of the present invention is to improve the reliability of fixing a storage component in a hermetic compressor. Disclosure of the invention
- the present invention relates to a method for fixing a compression element (20) to a casing (10) with a fixing member (40) made of steel having a carbon content of 2.0% or less, or a drive motor.
- the stator core (34) of (30) is welded to the casing (10).
- the first invention is based on the premise that the compression element (20) for compressing the working fluid is enclosed in a casing (10), and the compression element (20) contains carbon. It is fixed to a fixing member (40) made of steel having a ratio of 2.0% or less and welded to a casing (10).
- the fixing member (40) is a compression element.
- the compression element (20) includes a main body (22), a lid (23) forming an upper surface of the compression chamber (26), and a compression chamber (26).
- the fixing member (40) is welded to the casing (10), and the fixing member (40) is attached to the body (22) of the compression element (20). ), At least one of the lid (23) and the bottom (24) is fastened and fixed.
- the compression element (20) is a cylinder.
- the fixing member (40) is formed in an annular shape so that the compression element (20) is fitted therein, and the fixing member (40) is provided with lubricating oil.
- An oil return hole (47) for flowing down is formed, and an opening area of the oil return hole (47) is set to 50% or more with respect to a bottom area of the fixing member (40).
- the casing (10) is provided with a welding hole (28) corresponding to the fixing member (40), and the fixing member (40) is It is welded to the casing (10) through the welding hole (28).
- a stator (32) in which a stator core (34) is wound with a winding is provided in the casing (10); And a rotor (33) rotatably disposed in the inner space and drivingly connected to the compression element (20), and a drive motor (30) for driving the compression element (20) is housed therein.
- the stator core (34) of the motor (30) is welded to the casing (10).
- An eighth invention provides a stator (32) in which a winding is mounted on a stator core (34), a stator (32) rotatably disposed in the stator (32), and a drive element driven by a compression element (20).
- a drive motor (30) having a rotor (33) connected thereto and driving the compression element (20) is provided on the premise of a hermetic compressor housed in a casing (10).
- the stator core (34) of 30) is welded to the casing (10).
- the goosen '(10) is provided with a welding hole (38) corresponding to the stator core (34), and the stator core (34) It is welded to the casing (10) through the welding hole (38).
- the stator core (34) has an oil return portion (83) having an area of 5% or more of a bottom area inside the casing (10). ) Is formed.
- the oil return portion (83) of the stator core (34) is provided at a portion where the outer peripheral surface of the stator core (34) is in contact with the casing (10). They are formed adjacent to each other.
- the high-pressure dome type in which the working fluid discharged from the compression element (20) fills the inside of the casing (10). has been established.
- the working fluid is connected to a refrigerant circuit that performs a refrigeration cycle by compressing the working fluid to or above its critical pressure.
- the compression element (20) for compressing the working fluid is fixed to the fixing member (40) made of steel having a carbon content of 2.0% or less and welded to the casing (10).
- the fixing member (40) made of steel having a carbon content of 2.0% or less and welded to the casing (10).
- a welding defect such as a disconnection of a weld at a welded portion, for example, welding of an object.
- the reliability of the welding for fixing the compression element (20) can be improved.
- the fixing member (40) is formed separately from the compression element (20) and the casing (10), and the compression element (40) is connected via the fixing member (40). (20) and the casing (10) are fixed, so that even if the welding part of the compression element (20) is made of, for example, a solid material, the reliability of the welding for fixing the compression element (20) is reduced. Performance can be improved.
- the fixing member (40) is fixed to the casing (10) by welding, while the fixing member (40) is fixed to the body (22) of the compression element (20) by Since at least one of the lid (23) and the bottom (24) is fastened and fixed, the casing ( The reliability of welding fixation to 10) can be improved, and the compression element (20) can be securely fixed to the fixing member (40).
- the compression element (20) is provided with a cylinder (21), an oscillating piston (25), and a bush (66).
- the bush hole (65) is formed in 21).
- the fixing member (40) has a bush through hole (46) communicating with the push hole (65). Therefore, the lubricating oil in the casing (10) passes through the bush through hole (46). And can easily flow into the bush hole (65). As a result, for example, even when a high-viscosity lubricating oil is used, the lubricating oil can reliably flow into the push hole (65).
- the compression element (20) is inserted into the annular fixing member (40), and an oil return hole (47) is formed in the fixing member (40). ing. Since the opening area of the oil return hole (47) is 50% or more of the bottom area of the fixing member (40), the lubricating oil on the fixing member (40) can be easily dropped. Therefore, even when, for example, a high-viscosity lubricating oil is used, the lubricating oil in the goose (10) can be reliably returned to the oil reservoir.
- the fixing member (40) is welded to the casing (10) through a welding hole (28) provided corresponding to the fixing member (40). With this configuration, the compression element (20) can be easily and reliably fixed.
- the stator core (34) of the drive motor (30) for driving the compression element (20) is welded to the casing (10). Even if (10) expands and deforms, it is possible to prevent the stator core (34) from being displaced.
- the stator core (34) is generally made of steel, the stator core (34) can be securely welded to the casing (10). As a result, it is possible to prevent the air gap between the stator core (34) and the rotor (33) from becoming worse, and prevent the stator core (34) from contacting the rotor (33), The reliability of the compressor (1) can be improved.
- the stator core (34) is welded to the casing (10) through a welding hole (38) provided corresponding to the stator core (34).
- the drive motor (30) can be easily and reliably fixed.
- an oil return portion (83) is formed in the stator core (34), and an area of the oil return portion (83) is provided inside the casing (10).
- the lubricating oil in the casing (10) can be easily returned to the oil storage section through the oil return section (83) of the stator core (34) because the bottom area is 5% or more of the bottom area. You. Further, even when a high-viscosity lubricating oil is used, the lubricating oil can be reliably returned to the oil reservoir.
- the oil return portion (83) of the stator core (34) is adjacent to a portion where the outer peripheral surface of the stator core (34) is in contact with the casing (10). This allows the portion to be welded to the casing (10) to be secured, while ensuring that lubricating oil adhering to the inner wall of the casing (10) is returned to the oil reservoir.
- the working fluid discharged from the compression element (20) is configured as a high-pressure dome type in which the inside of the casing (10) is filled. Therefore, since the fluid discharged under pressure is filled in the casing (10), the pressure in the casing (10) becomes high and the deformation of the casing (10) increases.
- the compression element (20) is made of steel with a carbon content of 2.0% or less and the compression element (20) is fixed by the fixing member (40) welded to the casing (10), such deformation is caused. Even in a large case, it is possible to prevent a welding defect such as a welding error, such as when welding a solid.
- the working fluid is configured to compress the working fluid to the critical pressure or more
- the high pressure in the hermetic compressor (1) is extremely high. Become higher.
- the compression element (20) is made of steel with a carbon content of less than 2.0% and the compression element (20) is fixed by the fixing member (40) welded to the casing (10), Even in the case of expansion and deformation, it is possible to prevent poor welding such as welding failure such as when welding a solid.
- the casing (10) when the casing (10) is deformed due to an increase in the internal pressure of the casing (10), for example, welding at a welded portion such as welding of an object is performed. It is possible to prevent welding defects such as separation. As a result, the reliability of the welding for fixing the compression element (20) can be improved.
- the welding part of the compression element (20) is compared with the conventional one in the same manner as before. Even in the case where the compression element (20) is made of a solid material, the reliability of welding for fixing the compression element (20) can be improved.
- the reliability of welding fixation to the casing (10) can be improved as in the related art.
- the compression element (20) can be securely fixed to the fixing member (40).
- the lubricating oil in the casing (10) can easily flow into the bush hole (65) through the push through hole (46).
- the lubricating oil can reliably flow into the bush hole (65).
- the lubricating oil in the casing (10) can be reliably returned to the oil storage section.
- the fixing member (40) is welded to the casing (10) through the welding hole (28) provided corresponding to the fixing member (40). (20) can be easily and reliably fixed by welding.
- the stator core (34) it is possible to prevent the stator core (34) from being displaced even if the casing (10) expands and deforms due to an increase in the internal pressure, and the stator core (34) can be securely fixed to the casing (10).
- the air gap between the stator core (34) and the rotor (33) is reduced, and the stator core (34) can be prevented from contacting the rotor (33).
- the reliability of the compressor (1) can be improved.
- the stator core (34) is welded to the casing (10) through the welding holes (38) provided corresponding to the stator core (34).
- the drive motor (30) can be easily and reliably welded and fixed.
- the lubricating oil in the casing (10) can be easily returned to the oil storage section through the oil return section (83) of the stator core (34). Further, even when a high-viscosity lubricating oil is used, the lubricating oil can be reliably returned to the oil reservoir.
- a portion to be welded to the casing (10) is secured.
- lubricating oil adhering to the inner wall of the casing (10) can be reliably returned to the oil reservoir.
- the casing (10) expands and deforms due to the inside of the casing (10) being filled with the fluid that has been pressurized and discharged, for example, welding such as welding of solids can be performed. It is possible to prevent welding defects such as welding dislocation in the part.
- FIG. 1 is a cross-sectional view showing the overall configuration of the hermetic compressor according to the embodiment.
- FIG. 2 is a sectional view showing the configuration of the cylinder body and the swing.
- FIG. 3 shows the configuration of the front head and the mounting plate.
- FIG. 3A is a plan view
- FIG. 3B is a cross-sectional view taken along line III-III in FIG. 3A.
- FIG. 4 shows a configuration of the mounting plate.
- FIG. 4A is a plan view
- FIG. 4B is a cross-sectional view taken along line IV-IV of FIG. 4A.
- FIG. 5 is a cross-sectional view taken along line VV of FIG. 3A.
- FIG. 6 is a plan view of the stator core. BEST MODE FOR CARRYING OUT THE INVENTION
- the hermetic compressor (1) relates to an oscillating piston type rotary compressor. As shown in FIG. 1, the hermetic compressor (1) includes a compression element (20) for compressing a refrigerant as a working fluid in a casing (10);
- a compressor motor (30) which is a drive motor disposed at the top of (20), and is formed in a hermetically sealed type, so-called high-pressure dome type.
- carbon dioxide (co 2 ) is used as a refrigerant, and is connected to a refrigerant circuit (not shown) for performing a refrigerating cycle of an air conditioner or the like, and compresses the refrigerant to a pressure higher than its critical pressure (1).
- the high pressure of this refrigeration cycle is set to, for example, 13.7 MPa.
- the casing (10) includes a cylindrical body (11) and bowl-shaped end plates (12, 13) welded and fixed to the upper and lower sides of the body (11).
- the body (11) of the casing (10) is provided with a suction pipe (15) penetrating the body (11) and a body (11) above the connection part of the suction pipe (15).
- a discharge pipe (16) penetrating and communicating the inside and outside of the casing (10) is provided.
- the upper end plate (12) is provided with a terminal (17) that is connected to an external power supply (not shown) and supplies power to the compressor motor (30).
- an oil storage section in which a predetermined amount of lubricating oil is stored is formed in a lower portion of the casing (10) (not shown).
- hermetic compressor (1) in order to compress a refrigerant having a very high pressure, such as carbon dioxide, as a working fluid, an oil film of a sliding portion is secured in consideration of a bearing load. High-viscosity lubricating oils are used as much as possible.
- a bracket (18) for supporting the compressor (1) is provided at the lower end of the lower end plate (13).
- the compression element (20) includes a cylinder (21) and a swing (25) as a swinging piston that swings in the cylinder (21), and is arranged on a lower side in the casing (10).
- the cylinder (21) includes a cylinder body (22) as a main body, a front head (23) as a lid, and a rear head (24) as a bottom.
- the cylinder body (22) is formed in a cylindrical shape, and is arranged concentrically with the body (11) of the casing (10).
- the front head (23) is located at the upper end of the cylinder body (22), and the rear head (24) is located at the lower end of the cylinder body (22).
- This cylinder body (22), front head (23) and The rear head (24) is fastened with bolts (29) and assembled together.
- the cylinder body (22), the front head (23), and the rear head (24) are made of animal.
- the cylinder (21) is fixed to a body (11) of a casing (10) via a mounting plate (40) as a fixing member.
- the mounting plate (40) is fastened to the front head (23) by bolts (42) and fixed to the body (11) of the casing (10) by welding. ing.
- the molten metal flows in from the outside of the casing (10) through a welding hole (28) that penetrates the body (") of the casing (10) to form a fusion zone, thereby forming a fusion with the mounting plate (40).
- the mounting plate (40) is welded and fixed to the body (11) of the casing (10) The details of the mounting plate (40) will be described later.
- the cylinder (21) has an inner peripheral surface of the cylinder body (22), a lower end surface of the front head (23), an upper end surface of the rear head (24), and an outer peripheral surface of the swing (25).
- a compression chamber (26) is defined.
- the front head (23) and the rear head (24) are formed with shaft holes (23a, 24a) penetrating vertically through the center, and the drive shaft (31) is formed in the shaft holes (23a, 24a). Is rotatably fitted. That is, the drive shaft (31) is arranged to extend vertically in the center of the casing (10), and the front head (23), the compression chamber (26) and the rear head ( 24) penetrates vertically.
- the compressor motor (30) includes a stator (32) as a stator and a rotor (33) as a rotor, and is arranged above the compression element (20).
- the stator (32) includes a stator core (34), which is a cylindrical stator core, and three-phase windings mounted on the stator core (34). An axial end of each winding projects from an axial end of the stator core (34) and is formed at a coil end (36).
- the stator (32) is configured to generate a rotating magnetic field by energizing each winding. Details of the stator core (34) will be described later.
- the rotor (33) has a permanent magnet (not shown) fitted therein, is configured to be rotatable inside the stator (32), and has the drive shaft (31) fitted therein so as to be compressed. It is drivingly connected to (20).
- the stator core (34) is shrink-fitted to the trunk (11) of the casing (10), and is fixed to the trunk (11) by welding.
- the molten metal flows in from the outside of the casing (10) through a welding hole (38) penetrating the body (11) of the casing (10) to form a fusion portion, thereby forming the stator core (34) and the casing.
- the body (11) of (10) is fixed by welding. 090
- the rotor (33) rotates and the drive shaft (31) rotates, thereby applying a rotational driving force to the compression element (20). Then, the compression element (20) is driven.
- the drive shaft (31) is provided with a centrifugal pump and an oil supply passage.
- the centrifugal pump is provided at the lower end of the drive shaft (31), and is configured to pump up the lubricating oil stored in the lower portion of the casing (10) with the rotation of the drive shaft (31).
- the oil supply passage extends in the drive shaft (31) in the vertical direction and communicates with oil supply ports provided in each part so as to supply lubricating oil pumped by the centrifugal pump to each sliding part. .
- An accumulator (50) is connected to the hermetic compressor (1) via a suction pipe (15).
- the accumulator (50) is a vertically long hermetically sealed container comprising a body member (51), a bowl-shaped upper member (52) and a lower member (53) joined to the upper end or lower end of the body member (51). Is configured.
- the lower end of the lower member (53) has the lower end of the return pipe (54) inserted into the upper end of the suction pipe (15) 1 and the upper end of the upper member (52).
- the return pipe (54) is for guiding the refrigerant circulating in the refrigerant circuit to the accumulator (50), and has an upper end connected to a pipe (not shown) constituting the refrigerant circuit.
- the suction pipe (15) is arranged so as to extend in the closed container up to the height of the upper end of the body member (51).
- the accumulator (50) is configured to separate the liquid refrigerant from the refrigerant flowing through the return pipe (54).
- the cylinder body (22) has a swing (25) disposed inside thereof, and has a suction passage (64) and a bush hole (65) formed therein.
- the swing (25) is formed by integrally forming a cylindrical rotor part (60) and a rectangular parallelepiped blade part (61), and the rotor part (60) is located in the compression chamber (26).
- An eccentric part (62) formed integrally with the drive shaft (31) is fitted into the rotor part (60), and is rotatably supported by the eccentric part (62).
- the swing (25) divides the compression chamber (26) into a low-pressure chamber (26a) and a high-pressure chamber (26b).
- the suction passage (64) is formed so as to penetrate the outer peripheral surface and the inner peripheral surface of the cylinder body (22) in the radial direction.
- the suction passage (64) has an inner end that opens to the compression chamber (26) and is configured to be able to communicate with the low-pressure chamber (26a).
- a suction pipe (15) fitted into the body (11) of the casing (10) is fitted into the suction passage (64).
- the push hole (65) is provided on the inner peripheral surface of the cylinder body (22) near the suction passage (64) and extends from the upper end surface to the lower end surface of the cylinder body (22). .
- a pair of bushes (66) having a semi-lunar cross section are arranged so as to be swingable.
- the bush (66) is disposed near the inner peripheral surface of the cylinder body (22) in the push hole (65), and a back space (67) is provided on the outer peripheral side of the bush (66) in the bush hole (65). Is formed.
- a blade (61) of a swing (25) is inserted between the two bushes (66), and the blade (61) is supported by the bushes (66) so as to be able to move forward and backward.
- the mounting plate (40) includes an annular bottom portion (44) and a side portion (45) erected on the periphery of the bottom portion (44). It has a U-shaped vertical section.
- the front head (23) of the compression element (20) is inserted so as to close the opening inside the bottom part (44).
- the front end of the front head (23) is flush with the lower end of the bottom surface (44) of the mounting plate (40).
- the mounting plate (40) is made of steel having a carbon content of 2.0% by mass or less, and has a side member (45) welded to a body (11) of a casing (10). Make up.
- the compression element (20) is composed of a mounting plate, which is a fixing member made of steel having a carbon content of 2.0% or less by mass and welded to the casing (10) with respect to the casing (10). Fixed to (40).
- a bottom surface concave portion (46) is formed which is recessed outward in the radial direction.
- This bottom recess (46) Is formed from the upper surface to the lower surface of the bottom portion (44) at a position corresponding to the position directly above the bush hole (65) of the cylinder body (22).
- the space in the casing (10) and the cylinder body It is configured such that the bush hole (65) in (22) communicates with the back space (67).
- the bottom recess (46) is for allowing the lubricating oil in the goose sink "(10) to flow into the bush hole (65), and constitutes a bush through-hole communicating with the bush hole (65). I have.
- the bottom plate (44) of the mounting plate (40) has an oil return hole (47) for returning oil, and a through hole for inserting a bolt (42) to be fastened to the front head (23). (41) are formed. Three through holes (41) are formed.
- the oil return holes (47) are constituted by a plurality of oblong holes (47a) which are arranged at substantially equal intervals in the circumferential direction and penetrate the bottom portion (44) to the upper portion and have an oval shape in plan view.
- the oil return hole (47) is set to have an opening area of 50% or more of the bottom area of the bottom part (44) of the mounting plate (40). That is, the total area of the opening areas of the long holes (47a) is set to be 50% or more of the bottom area of the bottom surface (44).
- the front head (23) has a plurality of fastening holes (70) and a cutout recess (71).
- the fastening hole (70) is for screwing a port (42) for fastening and fixing to the mounting plate (40), and is formed at a position corresponding to the through hole (41) of the mounting plate (40).
- the notch (71) has a substantially elliptical shape in plan view on the upper surface of the front head (23).
- the front head (23) has a discharge hole (72) for discharging the high-pressure refrigerant in the compression chamber (26) and a fastening hole (74) for fastening the port (73).
- the discharge hole (72) extends from the lower end surface of the front head (23) to the four notches (71) at a position adjacent to the inner peripheral surface of the cylinder body (22) and corresponding to the vicinity of the push hole (65). It is formed so as to penetrate and can communicate with the inside of the casing (10).
- the discharge hole (72) is configured to be able to communicate with the high-pressure chamber (26b) of the compression chamber (26).
- the front head (23) has a discharge valve (75) and a holding plate (76) by a port (73) screwed into the fastening hole (74). ) Are fastened and fixed.
- the discharge valve (75) is formed as a plate-like on-off valve that closes the upper end of the discharge hole (72), and when the refrigerant pressure in the compression chamber (26) rises and becomes approximately equal to the pressure in the casing (10).
- the discharge hole (72) is bent to open, and the inside of the compression chamber (26) is communicated with the inside of the casing (10).
- the holding plate (76) is disposed above the discharge valve (75), and serves to regulate the amount of deflection of the discharge valve (75) so that the discharge valve (75) does not excessively bend. It is. In FIG. 3B, the discharge valve (75), the holding plate (76), and the bolt (73) are omitted.
- the stator core (34) is formed in a cylindrical shape and has a winding insertion portion (a plurality of grooves extending in the axial direction of the drive shaft (31)) on its inner peripheral surface. 81) are formed at equal intervals in the circumferential direction. For example, 24 winding insertion portions (81) are formed, and windings of each phase of the three-phase windings are inserted into the winding insertion portion (81). Further, a core cut portion (83), which is an oil return portion, is formed on the outer peripheral surface of the stator core (34).
- the core cut portion (83) is constituted by a plurality of outer surface recesses (83a) which are arranged at equal intervals in the circumferential direction and extend in the axial direction.
- the outer surface concave portions (83a) are formed at four positions at 90 ° intervals from the upper end surface to the lower end surface of the stator core (34).
- the core cut portion (83) is provided as a flow path for refrigerant and lubricating oil in the casing (10).
- the area of the core cut portion (83) is set to be at least 5% of the bottom area of the inner surface of the casing (10).
- the casing (10) is a bottom surface area of the inner surface of 9 8 5 2 mm 2
- the area of Koakatsuto portion (83) is in the 9 5 1 mm 2.
- the outer peripheral surface of the stator core (34) is in contact with the inner peripheral surface of the body (11) of the casing (10) except for the core cut portion (83).
- the core cut portion (83) is formed adjacent to a portion in contact with the casing (10).
- the operation of the hermetic compressor (1) according to the present embodiment will be described.
- the compressor motor (30) When electric power is supplied to the compressor motor (30) through the terminal (19), the rotor (33) rotates, and the rotation of the rotor (33) causes the swing (25) of the compression element (20) via the drive shaft (31). Is transmitted to Thus, the compression element (20) performs a predetermined compression operation.
- the compression operation of the compression element (20) will be described with reference to FIG. First, the state in which the cylinder body (22) and the swing (25) are in contact with the cylinder body (22) immediately to the right of the inner opening end of the suction passage (64) formed in the cylinder body (22) will be described. ) The volume of the low-pressure chamber (26a) is minimized. When the swing (25) is rotated clockwise by being driven by the compressor motor (30), the volume of the low-pressure chamber (26a) is increased according to the rotation of the swing (25), and the low-pressure chamber (26a) is supplied with the low-pressure chamber. Is sucked. This low-pressure refrigerant flows from the refrigerant circuit to the accumulator
- the liquid refrigerant flows through the suction pipe (15).
- the suction of the refrigerant continues until the swing (25) revolves once and the cylinder body (22) comes into contact with the swing (25) again immediately to the right of the inner open end of the suction passage (64).
- the inner surface of the cylinder (21) and the swing (25) are covered with a lubricating oil film, and the refrigerant contains lubricating oil.
- the part where the refrigerant has been sucked in this way is the high-pressure chamber where the refrigerant is compressed.
- the volume of the high-pressure chamber (26b) is the maximum, and the high-pressure chamber (25b) is filled with a low-pressure refrigerant.
- the discharge hole (72) of the front head (23) is connected to the discharge valve.
- the casing (10) is filled with a high-pressure refrigerant.
- the high-pressure refrigerant is discharged from the discharge pipe (16) and circulates through a refrigerant circuit (not shown).
- part of the lubricating oil contained in the high-pressure refrigerant in the casing (10) adheres to the inner wall of the casing (10).
- the oil flows down along the inner wall of the casing (10), flows between the outer surface recess (83a) of the stator core (34) and the casing (10), and then returns to the oil return hole (47) of the mounting plate (40). ) Or bottom recess
- the fixing member for fixing the compression element (20) to the casing (10) is provided. It consists of a mounting plate (40) that is separate from the compression element (20) and the casing (10), and this mounting plate (40) is made of steel with a carbon content of 2.0% or less.
- the mounting plate (40) is welded and fixed to the casing (10), while the mounting plate (40) is fixed to the front head of the compression element (20).
- the compression element (20) is provided with a cylinder (21), an oscillating piston (25), and a bush (66), and a bush hole (65) is formed in the cylinder (21). ing.
- the mounting plate (40) has the bush hole (65) 2090
- a bottom recess (46) communicating with the bottom surface is formed. Therefore, the lubricating oil in the casing (10) can easily flow into the bush hole (65) through the bottom recess (46). As a result, high-viscosity lubricating oil can reliably flow into the bush hole (65).
- the opening area of the oil return hole (47) formed in the mounting plate (40) is set to 50% or more of the bottom area of the mounting plate (40), the lubricating oil on the mounting plate (40) is Can be easily dropped. Therefore, high-viscosity lubricating oil can be reliably returned to the oil reservoir.
- stator core (34) of the compressor motor (30) that drives the compression element (20) is welded to the casing (10), the casing (10) expands and deforms due to an increase in internal pressure. Therefore, the stator core (34) can be prevented from being displaced, and the steel stator core (34) can be securely welded to the casing (10). The air gap with (33) can be prevented from becoming worse, and the stator core (34) can be prevented from contacting the rotor (33), and the reliability of the compressor (1) can be improved.
- the mounting plate (40) and the stator core (34) are welded through the welding holes (28, 38), they can be easily and reliably welded.
- a core cut portion (83) was formed in the stator core (34), and the area of the core cut portion (83) was set to 5% or more of the bottom area inside the casing (10).
- the lubricating oil in the parentheses can be easily returned to the oil reservoir through the core cut portion (83) of the stator core (34), and the high-viscosity lubricating oil can be reliably returned to the oil reservoir.
- the core cut portion (83) of the stator core (34) is formed adjacent to the portion where the stator core (34) is in contact with the casing (10), a portion to be welded to the casing (10) is secured.
- the lubricating oil adhering to the inner wall of the casing (10) can be reliably returned to the oil reservoir.
- the refrigerant discharged from the compression element (20) fills the inside of the casing (10). Even if the casing (10) expands and deforms due to the inside of the casing (10) being filled with the pressurized and discharged refrigerant due to the high-pressure dome type that is filled, welding will not occur. Welding failure and displacement of the stator core (34) can be prevented.
- the working fluid is configured to be compressed to the critical pressure or more, the high pressure becomes very high in the hermetic compressor (1).
- the mounting plate (40) that fixes the compression element (20) to the casing (10) is made of steel with a carbon content of 2.0% or less, the inside of the casing (10) is Even when the steel is expanded and deformed due to a very high pressure, it is possible to prevent welding defects such as welding loss.
- the stator core (34) is welded, even if the inside of the casing (10) expands and deforms due to a very high pressure, the displacement of the stator core (34) can be prevented.
- the cylinder (21) is fixed to the casing (10) via the mounting plate (40) separate from the cylinder (21).
- the fixing member has such a configuration. It is not limited. In short, it is only necessary that the compression element (20) is made of steel having a carbon content of 2.0% or less and is fixed by the fixed member (40) welded to the casing (10).
- the mounting plate (40) is not limited to the configuration fixed and fixed to the front head (23).
- the mounting plate (40) is fixed to the cylinder body (22) or the rear head (24). Is also good.
- the compression element (20) is not limited to a configuration in which the rotor (60) and the blade (61) of the swing (25) are integrally formed. Further, in this case, the configuration may be such that the bottom concave portion (46) of the mounting plate (40) is omitted.
- the oil return hole (47) of the mounting plate (40) may be omitted.
- the working fluid that has a very high pressure is not used
- the configuration in which the stator core (34) of the compressor motor (30) is welded to the casing (10) or the configuration in which the compression element (20) is fixed via the mounting plate (40) may be omitted.
- the mounting plate (40) and the stator core (34) are not limited to welding through the welding holes (28, 38).
- the cutout area of the core cut portion (83) of the stator core (34) may be reduced.
- the hermetic compressor according to the present invention is useful for compressing a fluid having a very high pressure, and particularly suitable for use in an air conditioner.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03707078A EP1486672A4 (en) | 2002-03-07 | 2003-02-25 | COMPRESSOR CLOSES |
US10/478,422 US7618242B2 (en) | 2002-03-07 | 2003-02-25 | Hermetic sealed compressor |
KR1020037016983A KR100544786B1 (ko) | 2002-03-07 | 2003-02-25 | 밀폐형 압축기 |
BR0303323-6A BR0303323A (pt) | 2002-03-07 | 2003-02-25 | Compressor vedado hermético |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002061665A JP2003262192A (ja) | 2002-03-07 | 2002-03-07 | 密閉型圧縮機 |
JP2002-61665 | 2002-03-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003074871A1 true WO2003074871A1 (fr) | 2003-09-12 |
Family
ID=27784866
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/002090 WO2003074871A1 (fr) | 2002-03-07 | 2003-02-25 | Compresseur ferme |
Country Status (8)
Country | Link |
---|---|
US (1) | US7618242B2 (ja) |
EP (1) | EP1486672A4 (ja) |
JP (1) | JP2003262192A (ja) |
KR (1) | KR100544786B1 (ja) |
CN (1) | CN1287087C (ja) |
BR (1) | BR0303323A (ja) |
MY (1) | MY135925A (ja) |
WO (1) | WO2003074871A1 (ja) |
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JPH10318169A (ja) * | 1997-05-21 | 1998-12-02 | Matsushita Refrig Co Ltd | 縦型ロータリ圧縮機 |
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Non-Patent Citations (1)
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Also Published As
Publication number | Publication date |
---|---|
EP1486672A4 (en) | 2010-08-18 |
KR100544786B1 (ko) | 2006-01-23 |
BR0303323A (pt) | 2004-03-30 |
CN1287087C (zh) | 2006-11-29 |
KR20040010781A (ko) | 2004-01-31 |
CN1498311A (zh) | 2004-05-19 |
MY135925A (en) | 2008-07-31 |
US7618242B2 (en) | 2009-11-17 |
JP2003262192A (ja) | 2003-09-19 |
EP1486672A1 (en) | 2004-12-15 |
US20040219037A1 (en) | 2004-11-04 |
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