EP2770212B1 - Rotationskompressor mit zwei zylindern - Google Patents
Rotationskompressor mit zwei zylindern Download PDFInfo
- Publication number
- EP2770212B1 EP2770212B1 EP12841299.6A EP12841299A EP2770212B1 EP 2770212 B1 EP2770212 B1 EP 2770212B1 EP 12841299 A EP12841299 A EP 12841299A EP 2770212 B1 EP2770212 B1 EP 2770212B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- crankshaft
- cylinders
- partition plate
- hole
- compression
- 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.)
- Active
Links
- 230000006835 compression Effects 0.000 claims description 75
- 238000007906 compression Methods 0.000 claims description 75
- 238000005192 partition Methods 0.000 claims description 45
- 238000005096 rolling process Methods 0.000 claims description 38
- 239000010687 lubricating oil Substances 0.000 claims description 16
- 239000012530 fluid Substances 0.000 claims description 12
- 238000007789 sealing Methods 0.000 description 22
- 239000003507 refrigerant Substances 0.000 description 20
- 238000007796 conventional method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000289429 Philander Species 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Images
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
- 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
- F04C23/001—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 of similar working principle
-
- 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
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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
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
- F04C29/005—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
- F04C29/0057—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions for eccentric movement
-
- 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
- F04C2240/20—Rotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/50—Bearings
- F04C2240/56—Bearing bushings or details thereof
-
- 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
- F04C2240/60—Shafts
- F04C2240/605—Shaft sleeves or details thereof
-
- 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
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/02—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for several pumps connected in series or in parallel
Definitions
- the present invention relates to a rotary compressor having two cylinders used for an air conditioner, a freezing machine, a blower, a water heater and the like.
- a compressor is used in a freezing machine and an air conditioner.
- the compressor sucks gas refrigerant which is evaporated by an evaporator, compresses the gas refrigerant up to pressure required for condensation, and sends out the high temperature and high pressure gas refrigerant into a refrigerant circuit.
- a rotary compressor is known.
- the rotary compressors there is a rotary compressor having two cylinders configuring two compressor chambers in the compressor, and this compressor has been developed as a high-performance compressor having characteristics of low-vibration, low-noise and capable of operating at high speed, and the compressor is required to be small in size and to have high capacity.
- a case in which the method of increasing the eccentric amount of the crankshaft is used in a rotary compressor having two cylinders will be described below.
- two compression chambers are partitioned by a partition plate, and a through hole into which the crankshaft is inserted must be formed in the partition plate.
- a diameter of the through hole is limited to such a size that the crankshaft can be inserted into the through hole at the time of assembling operation and generally, the diameter is slightly larger than a diameter of an eccentric portion of the crankshaft.
- Fig. 5(a) is an assembling drawing of a crankshaft, a rolling piston and a partition plate when an eccentric amount is small.
- Fig. 5(b) is an assembling drawing when the eccentric amount is increased and a through hole of the partition plate is left as it is.
- a length of a sealing portion 140 between end surfaces of rolling pistons 108a and 108b and an end surface of a partition plate 105 in a non-eccentric direction becomes short.
- a fine gap in which the rolling pistons 108a and 108b eccentrically rotate is provided in the sealing portion 140 in a height direction. To suppress leakage from this gap, it is desired that the length of the sealing portion 140 is formed as long as possible, but if the eccentric amounts of the crankshaft eccentric portions 107a and 107b are increased, the length of the sealing portion 140 becomes short as described above, and a problem that refrigerant leaks through the sealing portion 140 occurs.
- FIGs. 6 and 7 show a rotary compressor described in Patent Document 1.
- Fig. 6 is a side sectional view of the rotary compressor
- Fig. 7 is an enlarged view of essential portions thereof.
- the crankshaft 107 is divided for each of the crankshaft eccentric portions 107a and 107b as units, the units are connected to each other through a connecting portion 141 and they are assembled. According to this, a diameter of the through hole 105a of the partition plate 105 is made smaller than that of the crankshaft eccentric portion 107b. According to this, the length of the sealing portion 140 can be set longer, and airtightness of compression chambers 111a and 111b is enhanced.
- Patent Document 2 discloses a closed type rotary compressor.
- the rotary compressor incorporated in a closed vessel has philanders of which heights and bores are different from each other, and pistons in the compression chambers defined by the cylinders.
- the pistons are arranged for their eccentric rotation on eccentric portions of a rotary shaft which have different heights and eccentric levels from each other.
- the eccentric rotation of the pistons effects the compression of refrigerant.
- Patent Document 3 discloses a double work cylinder rotary compressor.
- the double work cylinder rotary compressor is structured that the outer diameter of an eccentric portion of a supplementary bearing is smaller than that of the eccentric portion of a main bearing.
- the outer diameter of an eccentric portion of a supplementary bearing is smaller than that of the eccentric portion of a main bearing, the inner diameter of the separator is reduced, which adequately ensures the sealing length L determined by the inner diameter of the separator and outer diameters of the supplementary and main bearings to prevent reduction of capacity and efficiency of the compressor due to leakage.
- crankshaft 107 since the crankshaft 107 is divided into units, it is difficult to secure a coaxial degree after the compressor is assembled. Further, since an intermediate bearing is newly provided in the through hole 105a of the partition plate 105, there is a problem that a bearing loss is increased. Further, since the number of parts is increased, there is also a problem of costs.
- the present invention has been accomplished to solve the conventional problems, and it is an object of the invention to provide an efficient compressor in which the number of parts is not increased, a diameter of a through hole of a partition plate is reduced, a length of a sealing portion is sufficiently secured, and airtightness of a compression chamber is enhanced.
- the present invention provides a rotary compressor as defined in claim 1.
- the rotary compressor has inter alia two cylinders in which two compression elements having rolling pistons in the cylinders are placed in adjacent to each other while sandwiching a partition plate therebetween, a crankshaft which is rotated by an electrical element is inserted into a through hole of the partition plate, if the crankshaft rotates, the rolling pistons inserted into crankshaft eccentric portions eccentrically rotates, and the two cylinders compress operating fluid in the cylinders by the eccentric rotation of the rolling pistons, wherein an inner diameter ⁇ Dc of the through hole is greater than an outer diameter ⁇ Db of one of the crankshaft eccentric portions and smaller than an outer diameter ⁇ Da of the other crankshaft eccentric portion.
- the outer diameter ⁇ Da of the other crankshaft eccentric portion is set larger than the inner diameter of the through hole of the partition plate. Therefore, in the compression element, it is possible to secure sufficient bearing proof strength against a load received from operating fluid which is compressed, and it is possible to secure the length of the sealing portion as long as possible without increasing the inner diameter of the through hole of the partition plate.
- the present invention even if the capacity of the compressor is set large, since the length of the sealing portion between the partition plate and the end surface of the rolling piston long can be made long, it is possible to enhance the airtightness of the compression chamber, and it is possible to realize an efficient rotary compressor having two cylinders.
- a first aspect of the present invention provides a rotary compressor having two cylinders in which two compression elements having rolling pistons in the cylinders are placed in adjacent to each other while sandwiching a partition plate therebetween, a crankshaft which is rotated by an electrical element is inserted into a through hole of the partition plate, if the crankshaft rotates, the rolling pistons inserted into crankshaft eccentric portions eccentrically rotates, and the two cylinders compress operating fluid in the cylinders by the eccentric rotation of the rolling pistons in a hermetic container, wherein an inner diameter ⁇ Dc of the through hole is greater than an outer diameter ⁇ Db of one of the crankshaft eccentric portions and smaller than an outer diameter ⁇ Da of the other crankshaft eccentric portion.
- Lubricating oil in a storing portion of a bottom of the hermetic container is supplied from a lower end of the crankshaft to the through hole through an interior of the crankshaft, and a region surrounded by the partition plate, the rolling pistons and the crankshaft is filled with the lubricating oil.
- Capacity of a compression chamber of one of the compression elements which compresses by the one crankshaft eccentric portion is set smaller than capacity of a compression chamber of the other compression element.
- the outer diameter ⁇ Da of the other crankshaft eccentric portion is greater than the inner diameter of the through hole of the partition plate. Therefore, in the compression element, it is possible to secure a sufficient shaft diameter with respect to a load received from operating fluid which is compressed. Further, even if the eccentric amount is increased, the inner diameter of the through hole of the partition plate is not increased. Therefore, it is possible to secure a length of the sealing portion as long as possible.
- a height Hb of the one crankshaft eccentric portion in its axial direction is higher than a height Ha of the other crankshaft eccentric portion in its axial direction. Also when necessary bearing proof strength cannot be secured only by the shaft diameter of the eccentric portion, it is possible to enhance the proof strength by the height of the bearing, and it is possible to minimize enlargement of the inner diameter of the through hole of the partition plate.
- the compression element if the shaft diameter of the eccentric portion is increased, the inner diameter of the through hole of the partition plate is increased. According to the compression element, if the compression chamber capacity is made smaller than that of the other compression element and a bearing load itself is reduced, it is possible to secure reliability.
- the compression element which compresses by the other crankshaft eccentric portion is placed closer to a main bearing which mainly pivotally supports the crankshaft.
- the main bearing which mainly pivotally supports is a bearing having the greatest product of a square of the bearing diameter and a bearing length when the crankshaft itself is supported by a plurality of bearings, and in the case of the rotary compressor having two cylinders, the main bearing is provided on the side of an electrical element.
- Pressure in the compression chamber is set substantially equal to discharge pressure. According to this, it becomes easily to supply lubricating oil to a sliding portion, and reliability of the compressor becomes excellent.
- the through hole is filled with high pressure lubricating oil or operating fluid, there is fear that the lubricating oil or the operating fluid leaks into the compression chamber by a pressure difference.
- the through hole of the partition plate is filled with low pressure lubricating oil or operating fluid on the other hand, it is conceived that operating fluid compressed through the sealing portion leaks out from the compression chamber which is compressing and discharging, but there is not pressure difference with respect to the compression chamber which is sucking, and time during which a pressure difference is held through the sealing portion becomes short. That is, if the through hole is filled with high pressure lubricating oil, an effect for securing the length of the sealing portion of the present invention appears more outstandingly.
- Fig. 1 is a longitudinal sectional view of a rotary compressor having two cylinders in an embodiment of the present invention
- Fig. 2 is a plan view of a compression element.
- FIG. 1 an electrical element 2 and a compression element 4 are accommodated in a hermetic container 1.
- the electrical element 2 rotates a crankshaft 7, and the crankshaft 7 drives the compression element 4.
- the compression element 4 is composed of compression elements 4a and 4b which independently carry out a compressing operation.
- the compression element 4a includes a cylinder 6a which forms a cylindrical space, and a rolling piston 8a which is placed in the cylinder 6a.
- the compression element 4b includes a cylinder 6b which forms a cylindrical space, and a rolling piston 8b which is placed in the cylinder 6b.
- the crankshaft 7 includes crankshaft eccentric portions 7a and 7b.
- the partition plate 5 is placed between the two compression elements 4a and 4b.
- a main bearing 31 is placed on the compression element 4a on its side close to the electrical element 2.
- the main bearing 31 forms an upper end plate together with a bearing portion which pivotally supports a crankshaft main shaft portion 7c.
- the upper end plate closes an electrical element 2 of the compression element 4a.
- An auxiliary bearing 32 is placed on the compression element 4b on its side close to an oil-storing portion 20.
- the auxiliary bearing 32 forms a lower end plate together with a bearing portion which pivotally supports a crankshaft auxiliary shaft portion 7d.
- the lower end plate closes the oil-storing portion 20 of the compression element 4b.
- the cylinder 6a is placed on an upper surface of the partition plate 5, and the cylinder 6b is placed on a lower surface of the partition plate 5.
- the one crankshaft eccentric portion 7b is accommodated in the cylinder 6b, and the other crankshaft eccentric portion 7a is accommodated in the cylinder 6a.
- crankshaft eccentric portions 7a and 7b are integrally formed on the crankshaft 7.
- the rolling piston 8a is rotatably mounted on the other crankshaft eccentric portion 7a, and the rolling piston 8b is rotatably mounted on the one crankshaft eccentric portion 7b.
- a vane groove 21a is formed in the cylinder 6a, and a vane groove 21b is formed in the cylinder 6b.
- a vane 22a is slidably placed in the vane groove 21a, and a vane 22b is slidably placed in the vane groove 21b.
- Back pressure is applied to the vane 22a, and the vane 22a is always in abutment against the rolling piston 8a.
- Back pressure is applied to the vane 22b, and the vane 22b is always in abutment against the rolling piston 8b.
- the cylinder 6a is provided with a suction passage 9a
- the cylinder 6b is provided with a suction passage 9b.
- a suction pipe 10a is connected to the suction passage 9a, and a suction pipe 10b is connected to the suction passage 9b.
- the suction passage 9a and the suction passage 9b are independent from each other, and the suction pipe 10a and the suction pipe 10b are independent from each other.
- the suction pipe 10a is in communication with a compression chamber 11a through the suction passage 9a, and the suction pipe 10b is in communication with a compression chamber 11b through the suction passage 9b.
- the suction pipes 10a and 10b are provided with an accumulator 12 for preventing liquid from being compressed in the compression chambers 11a and 11b.
- the accumulator 12 separates refrigerant into gas and liquid, and guides only refrigerant gap into the suction pipes 10a and 10b.
- the accumulator 12 has a cylindrical case 13, a refrigerant gas introducing pipe 14 is connected to an upper portion of the case 13, and two refrigerant gas lead-out pipes 15a and 15b are connected to a lower portion of the case 13.
- One ends of the refrigerant gas lead-out pipes 15a and 15b are connected to the suction pipes 10a and 10b, and the other ends of the refrigerant gas lead-out pipes 15a and 15b extend to an upper portion of a space in the case 13.
- crankshaft 7 If the crankshaft 7 is rotated by the electrical element 2, the crankshaft eccentric portions 7a and 7b eccentrically rotate in the cylinders 6a and 6b, and the rolling pistons 8a and 8b rotate while abutting against the vanes 22a and 22b.
- the rolling pistons 8a and 8b repeatedly suck and compress refrigerant gap in both the cylinders 6a and 6b with a period deviated from each other by half rotation.
- Lubricating oil in the oil-storing portion 20 of a bottom of the hermetic container 1 is supplied from a lower end of the crankshaft auxiliary shaft portion 7d to the through hole 5a through an interior of the crankshaft 7, and a region surrounded by the partition plate 5, the rolling pistons 8a and 8b and the crankshaft 7 is filled with the lubricating oil.
- Fig. 3 is a side view of essential portions showing a positional relation when the crankshaft, the partition plate and the rolling pistons of the rotary compressor of the embodiment of the invention are assembled in the embodiment of the invention.
- the partition plate 5 is inserted from the crankshaft auxiliary shaft portion 7d, and is placed between the one crankshaft eccentric portion 7b and the other crankshaft eccentric portion 7a through the one crankshaft eccentric portion 7b. For this reason, it is necessary that an inner diameter ⁇ Dc of the through hole 5a of the partition plate 5 is set greater than an outer diameter ⁇ Db of the one crankshaft eccentric portion 7b.
- the outer diameter ⁇ Da of the other crankshaft eccentric portion 7a is set greater than the inner diameter ⁇ Dc of the through hole 5a, and the partition plate 5 can not be inserted from the crankshaft main shaft portion 7c.
- the through hole 5a is filled with lubricating oil. Discharge pressure is applied to the lubricating oil existing in the through hole 5a.
- the through hole 5a is filled with operating fluid in some cases. In this case also, discharge pressure is applied to the operating fluid existing in the through hole 5a.
- a pressure difference between the compression chamber 11a and the compression chamber 11b is secured by a sealing portion 40 which is composed of an end surface of the partition plate 5 and end surfaces of the rolling pistons 8a and 8b.
- the sealing portion 40 is provided with a fine gap in a height direction so that the rolling piston 8 can eccentrically rotate. To suppress leakage from the gap, it is desired that a length (length in radial direction) of the sealing portion 40 is set as long as possible.
- the sealing portion 40 can be made long in the radial direction, and it is possible to prevent lubricating oil from leaking from the through hole 5a to the compression chambers 11a and 11b.
- Fig. 4 is an assembling drawing when the outer diameter ⁇ Db of the one crankshaft eccentric portion 7b is set equal to the outer diameter ⁇ Da of the other crankshaft eccentric portion 7a.
- the outer diameter ⁇ Db of the one crankshaft eccentric portion 7b which is inserted into the through hole 5a is increased, the inner diameter ⁇ Dc of the through hole 5a is increased. Therefore, although the outer diameter of the rolling piston 8b and the eccentric amount of the crankshaft eccentric portion 7b are the same, the length of the sealing portion 40 becomes short, and it can be found that leakage of lubricating oil from the through hole 5a to the compression chambers 11a and 11b is increased.
- the outer diameter ⁇ Db of the one crankshaft eccentric portion 7b which is inserted into the through hole 5a of the partition plate 5 at the time of the assembling operation is set smaller than the outer diameter ⁇ Da of the other crankshaft eccentric portion 7a, and the inner diameter ⁇ Dc of the through hole 5a is confined to such a size that the one crankshaft eccentric portion 7b having the small outer diameter can pass through the through hole 5a. According to this, the length of the sealing portion 40 can be increased, and it is possible to prevent high pressure lubricating oil from entering the compression chambers 11.
- a shaft height Hb of the one crankshaft eccentric portion 7b may be set higher than a shaft height Ha of the other crankshaft eccentric portion 7a as shown in Fig. 3 . According to this, also when necessary bearing proof strength can not be secured only by the shaft diameter of the one crankshaft eccentric portion 7b, it is possible to enhance the proof strength by the shaft height Hb, and it is possible to minimize enlargement of the inner diameter ⁇ Dc of the through hole 5a of the partition plate 5.
- compression chamber capacity of the compression element 4b may be set smaller than compression chamber capacity of the compression element 4a.
- the compression chamber capacity of the compression element 4b is capacity of the compression chamber 11a which is formed by the cylinder 6a, the rolling piston 8a, the upper end plate of the main bearing 31 and the partition plate 5.
- the compression chamber capacity of the compression element 4a is capacity of the compression chamber 11b which is formed by the cylinder 6b, the rolling piston 8b, the lower end plate of the auxiliary bearing 32 and the partition plate 5.
- the compression element 4a which compresses by the other crankshaft eccentric portion 7a may be placed closer to the main bearing 31 which mainly pivotally supports the crankshaft 7. Since the compression element 4a having a greater load can pivotally be supported in the vicinity of the main bearing 31, it is possible to reduce moment which is applied to the main bearing 31, and to secure high reliability for realizing the present invention.
- the rotary compressor having two cylinders of the present invention it is possible to enhance the airtightness of the compression chamber and to enhance the efficiency of the compressor by suppressing leakage through a sealing portion between the partition plate and the end surface of the rolling piston.
- the invention can also be applied to usage of an air conditioner and a pump type water heater using CO2 which is natural refrigerant in addition to a compressor for an air conditioner using HFC-based refrigerant.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Claims (3)
- Rotationskompressor mit zwei Zylindern (6a, 6b), in denen zwei Kompressionseinrichtungen (4a, 4b) mit Rollkolben (8a, 8b) in den Zylindern (6a, 6b) benachbart zueinander angeordnet sind, wobei eine Trennplatte (5) dazwischen angeordnet ist,eine Kurbelwelle (7), die durch eine elektrische Einrichtung (2) gedreht wird, ist in ein Durchgangsloch (5a) der Trennplatte (5) eingesetzt,wobei, wenn sich die Kurbelwelle (7) dreht, sich die Rollkolben (8a, 8b), die in die exzentrischen Kurbelwellenabschnitte (7a, 7b) eingesetzt sind, exzentrisch drehen, unddie beiden Zylinder (6a, 6b) durch die exzentrische Drehung der Rollkolben (8a, 8b) in einem hermetischen Behälter (1) Betriebsflüssigkeit in den Zylindern (6a, 6b) komprimieren,wobei ein Innendurchmesser φDc des Durchgangslochs (5a) größer als ein Außendurchmesser φDb eines der exzentrischen Kurbelwellenabschnitte (7a, 7b) und kleiner als ein Außendurchmesser φDa des anderen exzentrischen Kurbelwellenabschnitts (7a, 7b) ist,dadurch gekennzeichnet, dassSchmieröl in einem Speicherabschnitt (20) eines Bodens des hermetischen Behälters (1) von einem unteren Ende der Kurbelwelle (7) zu dem Durchgangsloch (5a) durch ein Inneres der Kurbelwelle (7) zugeführt wird, und ein Bereich, der von der Trennplatte (5), den Rollkolben (8a, 8b) und der Kurbelwelle (7) umgeben ist, mit dem Schmieröl gefüllt ist, unddas Fassungsvermögen einer Kompressionskammer (11a, 11b) einer der Kompressionseinrichtungen (4a, 4b), die durch den einen exzentrischen Kurbelwellenabschnitt (7a, 7b) komprimiert, kleiner als das Fassungsvermögen einer Kompressionskammer der anderen Kompressionseinrichtungen (4b, 4a) eingestellt ist.
- Rotationskompressor mit zwei Zylindern (6a, 6b) nach Anspruch 1,
wobei eine Höhe Hb des einen exzentrischen Kurbelwellenabschnitts (7a, 7b) in seiner axialen Richtung größer ist als eine Höhe Ha des anderen exzentrischen Kurbelwellenabschnitts (7a, 7b) in seiner axialen Richtung. - Rotationskompressor mit zwei Zylindern (6a, 6b) nach Anspruch 1 oder 2,
wobei die Kompressionseinrichtung (4a, 4b), die durch den anderen exzentrischen Kurbelwellenabschnitt (7a, 7b) komprimiert, näher an einem Hauptlager angeordnet ist, das die Kurbelwelle (7) hauptsächlich schwenkbar trägt.
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JP2011228585 | 2011-10-18 | ||
PCT/JP2012/006665 WO2013057946A1 (ja) | 2011-10-18 | 2012-10-18 | 2つのシリンダを持ったロータリ圧縮機 |
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JP6454879B2 (ja) * | 2014-06-24 | 2019-01-23 | パナソニックIpマネジメント株式会社 | 2つのシリンダを持ったロータリ圧縮機 |
JP6262101B2 (ja) * | 2014-08-27 | 2018-01-17 | 東芝キヤリア株式会社 | 回転式圧縮機及び冷凍サイクル装置 |
CN104314820A (zh) * | 2014-10-13 | 2015-01-28 | 广东美芝制冷设备有限公司 | 多缸旋转式压缩机及其曲轴组件 |
JP2017053263A (ja) | 2015-09-09 | 2017-03-16 | 三菱重工業株式会社 | ロータリ圧縮機 |
JP6570930B2 (ja) | 2015-09-09 | 2019-09-04 | 三菱重工サーマルシステムズ株式会社 | ロータリ圧縮機およびその製造方法 |
JP6426645B2 (ja) * | 2016-03-18 | 2018-11-21 | 日立ジョンソンコントロールズ空調株式会社 | 回転式圧縮機 |
CN106321617B (zh) * | 2016-10-26 | 2023-10-31 | 上海海立电器有限公司 | 曲轴以及旋转式压缩机 |
JP6489174B2 (ja) * | 2017-08-09 | 2019-03-27 | ダイキン工業株式会社 | ロータリ圧縮機 |
JP6489173B2 (ja) * | 2017-08-09 | 2019-03-27 | ダイキン工業株式会社 | ロータリ圧縮機 |
CN107476979A (zh) * | 2017-08-10 | 2017-12-15 | 珠海格力节能环保制冷技术研究中心有限公司 | 压缩机、空调器及压缩机的装配方法 |
CN107327402B (zh) * | 2017-08-21 | 2021-05-07 | 西安庆安制冷设备股份有限公司 | 一种滚动活塞压缩机及其压缩结构 |
EP3855022A4 (de) * | 2018-09-20 | 2022-04-27 | Toshiba Carrier Corporation | Drehkompressor und kühlkreisvorrichtung |
WO2020121443A1 (ja) * | 2018-12-12 | 2020-06-18 | 東芝キヤリア株式会社 | 回転式圧縮機および冷凍サイクル装置 |
CN112032051B (zh) * | 2019-06-04 | 2022-10-04 | 南昌海立电器有限公司 | 四缸滚动转子式压缩机 |
CN113738645B (zh) * | 2020-05-29 | 2023-03-14 | 广东美芝精密制造有限公司 | 压缩机及空调系统 |
CN111779756A (zh) * | 2020-05-29 | 2020-10-16 | 松下·万宝(广州)压缩机有限公司 | 一种曲轴和一种压缩机 |
CN114109821B (zh) * | 2021-11-09 | 2023-10-24 | 广东美芝精密制造有限公司 | 压缩机构、压缩机和制冷设备 |
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