US20220025876A1 - Compressor - Google Patents
Compressor Download PDFInfo
- Publication number
- US20220025876A1 US20220025876A1 US17/311,566 US201917311566A US2022025876A1 US 20220025876 A1 US20220025876 A1 US 20220025876A1 US 201917311566 A US201917311566 A US 201917311566A US 2022025876 A1 US2022025876 A1 US 2022025876A1
- Authority
- US
- United States
- Prior art keywords
- shaft
- compressor
- niche
- oil
- chamber
- 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.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 230000006835 compression Effects 0.000 claims abstract description 12
- 238000007906 compression Methods 0.000 claims abstract description 12
- 230000007246 mechanism Effects 0.000 claims abstract description 10
- 230000001050 lubricating effect Effects 0.000 claims abstract description 7
- 238000005461 lubrication Methods 0.000 claims abstract description 3
- 238000001816 cooling Methods 0.000 claims description 6
- 238000004378 air conditioning Methods 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 35
- 229910000906 Bronze Inorganic materials 0.000 description 10
- 239000010974 bronze Substances 0.000 description 10
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 10
- 230000003750 conditioning effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 239000012809 cooling fluid Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B27/1036—Component parts, details, e.g. sealings, lubrication
- F04B27/109—Lubrication
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/04—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B27/0404—Details, component parts specially adapted for such pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0094—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 crankshaft
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/02—Lubrication
- F04B39/0284—Constructional details, e.g. reservoirs in the casing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/02—Compressor arrangements of motor-compressor units
Definitions
- the present invention relates to compression systems for cooling systems and/or air conditioning systems and/or heat pumps or the like; more in particular, the object of the present invention is a compressor for cooling systems and/or air conditioning systems and/or heat pumps, of the reciprocating type, preferably of the semi-hermetic type.
- refrigerating semi-hermetic compressors are characterized by a casing with two chambers, respectively a compression chamber (with oil box) and a chamber for the motor of the compressor.
- the chambers are separated by means of a central support with two bronze bushes for the shaft transmitting motion from the motor to the slider-crank mechanism of the compression section and the electric motor.
- the oil pumped by a gear pump is conveyed to the central support through a duct inside the shaft.
- the oil is supplied to an annular recess provided between the two bronze bushes.
- Part of the oil is conveyed in the bronze bush on the side of the slider-crank mechanism and directly exits in the oil box.
- a similar quantity is conveyed towards the bronze bush motor side and then discharged motor side.
- the flow of cooling fluid sucked by the compressor passes through the chamber of the motor and causes the oil to be drawn to the cylinders and then to the outside of the compressor.
- the object of the present invention is to provide a compressor for cooling systems and/or conditioning systems and/or heat pumps, of the reciprocating type, preferably of the semi-hermetic type, to reduce or eliminate the amount of oil lubricating the support of the transmission shaft exiting into the chamber where the compressor actuating motor is housed.
- a compressor for cooling systems and/or air conditioning systems and/or heat pumps comprising a casing, inside which two chambers are defined, respectively a first chamber corresponding to the compression section, which, in turn, comprises at least one compression piston, a corresponding slider-crank mechanism for moving the piston and an oil box, and a second chamber for the motor of the compressor, a transmission shaft being provided, operatively connected to said motor and to said slider-crank mechanism, said chambers being separated by means of a support portion of said shaft, said support portion having a passage for said shaft, in said passage being provided at least one anti-friction bushing supporting said shaft, an oil supply duct being provided at least partially inside said shaft, the duct having an end opening exiting in the space between said shaft and said passage so as to allow the lubrication of said at least one anti-friction bushing and said shaft, characterized by comprising
- a discharge channel operatively connected to said niche and to said oil box, so that the oil lubricating said at least one anti-friction bushing and coming from said end opening is depressurized and adapted to come back at least partially into said oil box, thus eliminating or limiting the amount of oil achieving said second chamber with the motor.
- the niche can be provided on the surface, preferably the internal surface, of the anti-friction bushing.
- the niche may be provided on the surface of said transmission shaft; the niche is preferably an annular recess or a niche extending all around the axis of the shaft.
- the niche is preferably separated from the at least an end opening of the oil supply duct, i.e. the end opening is not inside the niche, i.e. it is outside the niche. Practically, the end opening exits outside the niche.
- the niche is open directly on the discharge channel.
- the discharge channel is provided on the inner surface of the passage.
- the discharge channel is provided below the transmission shaft.
- the discharge channel and the niche are directly connected by means of a through hole provided through the at least one anti-friction bushing.
- the discharge channel is provided on the surface of the support portion; preferably, the discharge channel has three closing sides formed by the support portion and a fourth side closed by the at least one anti-friction bushing.
- the compressor comprises a ring for limiting the oil leakage, provided around said shaft in a position opposite to said at least one end opening of the oil duct and with respect to said niche.
- the oil leakage limiting ring is arranged in a seat provided at the end of said passage facing said second chamber.
- the compressor comprises two anti-friction bushings arranged in series after each other in the passage.
- the compressor comprises a further niche where said one said end opening exits, provided in the form of annular recess on the shaft, or a further niche extending all around the shaft.
- the compressor comprises a further end opening directly exiting on the surface of the shaft into contact with the at least one anti-friction bushing.
- FIG. 1 is a longitudinal cross section of the compressor of the invention
- FIG. 2 is an enlargement of a portion of FIG. 1 relating to the central support area of the transmission shaft;
- FIG. 3 is a variant, according to the invention, of the central support area of the transmission shaft.
- a compressor for cooling systems and/or conditioning systems and/or heat pumps of the reciprocating and semi-hermetic type, according to the invention is indicated as a whole with number 10 .
- the compressor 10 comprises a casing 11 , inside which two chambers are defined, respectively a first chamber 12 corresponding to the compression section, and a second chamber 13 where the electric motor 14 is provided, actuating the compressor.
- the compression section of the first chamber 12 comprises one or more cylinders 15 for corresponding one or more pistons 16 moved by means of respective one or more slider-crank mechanisms 17 .
- the first chamber defines, in the inside thereof, a lubricating oil box 12 A.
- Each slider-crank mechanism 17 is operatively connected to a transmission shaft 18 , which is in turn operatively connected to the electric motor 14 .
- the two chambers 12 and 13 are separated by means of a wall, i.e. a support portion 19 for the transmission shaft 18 .
- the support portion 19 has a passage 20 , i.e. a substantially cylindrical hole, to allow the shaft to be provided between the two chambers 12 and 13 .
- first and a second anti-friction bushings 21 A and 21 B are arranged in series, i.e. two bronze bushes of substantially equal diameter and thickness, supporting the shaft 18 and allowing the rotation thereof, in a known manner.
- the compressor 10 comprises a lubricating system comprising, among the various components, an oil supply duct 22 provided at least partially inside the transmission shaft 18 .
- the duct 22 has a first end opening 23 exiting in the space between the shaft 18 and the passage 20 , and more in particular in a first niche 24 in the form of annular recess on the surface of the shaft 18 , i.e. extending all around the shaft.
- the first niche 24 is provided in a position in correspondence of the two facing ends of the two anti-friction bushings 21 . These ends are put over the first annular niche 24 .
- the duct 22 allows lubricating the anti-friction bushings 21 and the shaft 18 .
- the oil supply duct 22 comprises a second end opening 25 directly exiting on the surface of the shaft 18 , in contact with the first anti-friction bushing 21 A.
- a second annular niche 26 is provided on the surface of the shaft 18 , in a position between the end of the passage 20 facing the second chamber 13 and the first end opening 23 of the duct 22 .
- the second niche 26 is an annular recess provided on the surface of the shaft 18 and extends all around the shaft.
- first end opening 23 of the duct 22 does not exit in the second niche, it directly exits outside the second niche 26 .
- a discharge channel 27 is provided for discharging the oil, operatively connected to the second niche 26 and the oil box 12 A.
- the channel 27 has three closing sides formed by the body of the support portion (as provided thereon) and a fourth side closed by means of the second anti-friction bushing 21 B and the first anti-friction bushing 21 A.
- the discharge channel 27 and the second niche 26 are directly connected by means of a through hole 30 provided through the second anti-friction bushing 21 B.
- oil discharge channel 27 may be provided laterally to the shaft, or, in less preferred embodiments, above the shaft.
- FIG. 3 shows a variant of the central area of the compressor according to the invention, where both the first niche, now indicated with number 124 , and the second niche, now indicated with number 126 , are provided on the second anti-friction bushing 21 B, thus avoiding to excessively working the surface of the shaft 18 .
- the first niche 124 is closed only by means of the second bushing 21 B. In other examples, the first niche 124 may be closed only by means of the first bushing 21 A.
- first niche is provided on the first or the second bushing and the second niche is provided on the shaft, or vice versa.
- a seat 31 is provided for positioning a ring 32 limiting the oil leakage towards the second chamber 13 , i.e. the ring is provided in opposite position to the first end opening of the oil duct with respect to the second niche 26 .
- the lubricating oil is supplied, under pressure, in the oil supply duct 22 .
- the oil achieves the first and the second end opening, and is distributed between the bushings 21 and the inner surface of the passage 20 and the shaft 18 .
- the oil achieves the second niche 26 , it loses pressure and passes into the discharge channel 27 , for being discharged into the oil box 12 A.
Abstract
A reciprocating compressor (10) comprises a casing (11), inside which two chambers are defined, respectively a first chamber (12) corresponding to the compression section, which, in turn, comprises at least one piston (16), a slider-crank mechanism (17) and an oil box, and a second chamber (13) for the motor (14) of the compressor. A transmission shaft (18) is provided, operatively connected to said motor and to said slider-crank mechanism. Said chambers are separated by means of a supporting portion (19) of said shaft, said supporting portion having a passage (20) for said shaft, wherein at least one anti-friction bushing (21) is provided in said passage for supporting said shaft. An oil supply duct (22) is provided at least partially inside said shaft, wherein the duct (22) has at least an end opening (23, 25) exiting in the space between said shaft and said passage so as to allow the lubrication of said at least one anti-friction bushing and said shaft. A niche (24, 26) is provided between the end of said passage (20) facing said second chamber (13) and said end opening (23, 25) of said duct. A discharge channel (27) is operatively connected to said niche and to said oil box, so that the oil lubricating the anti-friction bushing (21) and coming from the end opening is depressurized and adapted to come back into said oil box, thus eliminating or limiting the amount of oil reaching the second chamber with the motor.
Description
- The present invention relates to compression systems for cooling systems and/or air conditioning systems and/or heat pumps or the like; more in particular, the object of the present invention is a compressor for cooling systems and/or air conditioning systems and/or heat pumps, of the reciprocating type, preferably of the semi-hermetic type.
- As it is well known, refrigerating semi-hermetic compressors are characterized by a casing with two chambers, respectively a compression chamber (with oil box) and a chamber for the motor of the compressor. The chambers are separated by means of a central support with two bronze bushes for the shaft transmitting motion from the motor to the slider-crank mechanism of the compression section and the electric motor.
- The oil pumped by a gear pump is conveyed to the central support through a duct inside the shaft. The oil is supplied to an annular recess provided between the two bronze bushes. Part of the oil is conveyed in the bronze bush on the side of the slider-crank mechanism and directly exits in the oil box. A similar quantity is conveyed towards the bronze bush motor side and then discharged motor side.
- The flow of cooling fluid sucked by the compressor passes through the chamber of the motor and causes the oil to be drawn to the cylinders and then to the outside of the compressor.
- The presence of oil downstream of the compressor is negative, as it reduces the exchange coefficient on the condensator and the evaporator.
- The object of the present invention is to provide a compressor for cooling systems and/or conditioning systems and/or heat pumps, of the reciprocating type, preferably of the semi-hermetic type, to reduce or eliminate the amount of oil lubricating the support of the transmission shaft exiting into the chamber where the compressor actuating motor is housed.
- These and other objects, that will be more apparent below, are achieved through a compressor for cooling systems and/or air conditioning systems and/or heat pumps, of the reciprocating type, comprising a casing, inside which two chambers are defined, respectively a first chamber corresponding to the compression section, which, in turn, comprises at least one compression piston, a corresponding slider-crank mechanism for moving the piston and an oil box, and a second chamber for the motor of the compressor, a transmission shaft being provided, operatively connected to said motor and to said slider-crank mechanism, said chambers being separated by means of a support portion of said shaft, said support portion having a passage for said shaft, in said passage being provided at least one anti-friction bushing supporting said shaft, an oil supply duct being provided at least partially inside said shaft, the duct having an end opening exiting in the space between said shaft and said passage so as to allow the lubrication of said at least one anti-friction bushing and said shaft, characterized by comprising
- a niche provided in a position comprised between the end of said passage facing said second chamber and said end opening of said duct and
- a discharge channel operatively connected to said niche and to said oil box, so that the oil lubricating said at least one anti-friction bushing and coming from said end opening is depressurized and adapted to come back at least partially into said oil box, thus eliminating or limiting the amount of oil achieving said second chamber with the motor.
- Practically, thanks to the configuration of the invention, it is possible to collect the oil lubricating the bronze bush motor side before it exits from the bronze bush, and to convey it to the oil box side.
- This is achieved through a preferably annular oil discharging niche on the shaft or on the bronze bush, and, if necessary, a discharge hole on the motor side bronze bush in correspondence of said annular niche, and a discharge channel provided in the lower part of the support portion, bringing the oil to the oil box.
- Alternatively, the niche can be provided on the surface, preferably the internal surface, of the anti-friction bushing.
- The niche may be provided on the surface of said transmission shaft; the niche is preferably an annular recess or a niche extending all around the axis of the shaft.
- The niche is preferably separated from the at least an end opening of the oil supply duct, i.e. the end opening is not inside the niche, i.e. it is outside the niche. Practically, the end opening exits outside the niche. Preferably, the niche is open directly on the discharge channel.
- Preferably, the discharge channel is provided on the inner surface of the passage.
- Preferably, the discharge channel is provided below the transmission shaft.
- Preferably, the discharge channel and the niche are directly connected by means of a through hole provided through the at least one anti-friction bushing.
- Preferably, the discharge channel is provided on the surface of the support portion; preferably, the discharge channel has three closing sides formed by the support portion and a fourth side closed by the at least one anti-friction bushing.
- Preferably, the compressor comprises a ring for limiting the oil leakage, provided around said shaft in a position opposite to said at least one end opening of the oil duct and with respect to said niche.
- Preferably, the oil leakage limiting ring is arranged in a seat provided at the end of said passage facing said second chamber.
- Preferably, the compressor comprises two anti-friction bushings arranged in series after each other in the passage.
- Preferably, the compressor comprises a further niche where said one said end opening exits, provided in the form of annular recess on the shaft, or a further niche extending all around the shaft.
- Preferably, the compressor comprises a further end opening directly exiting on the surface of the shaft into contact with the at least one anti-friction bushing.
- The invention will be better understood by following the description below and the attached drawing, showing a non-limiting embodiment of the invention. More specifically, in the drawing:
-
FIG. 1 is a longitudinal cross section of the compressor of the invention; -
FIG. 2 is an enlargement of a portion ofFIG. 1 relating to the central support area of the transmission shaft; -
FIG. 3 is a variant, according to the invention, of the central support area of the transmission shaft. - With reference to the figures listed above, a compressor for cooling systems and/or conditioning systems and/or heat pumps of the reciprocating and semi-hermetic type, according to the invention is indicated as a whole with
number 10. - The
compressor 10 comprises acasing 11, inside which two chambers are defined, respectively afirst chamber 12 corresponding to the compression section, and asecond chamber 13 where theelectric motor 14 is provided, actuating the compressor. - The compression section of the
first chamber 12 comprises one ormore cylinders 15 for corresponding one ormore pistons 16 moved by means of respective one or more slider-crank mechanisms 17. The first chamber defines, in the inside thereof, a lubricatingoil box 12A. - Each slider-
crank mechanism 17 is operatively connected to atransmission shaft 18, which is in turn operatively connected to theelectric motor 14. - The two
chambers support portion 19 for thetransmission shaft 18. Thesupport portion 19 has apassage 20, i.e. a substantially cylindrical hole, to allow the shaft to be provided between the twochambers - In the passage 20 a first and a second
anti-friction bushings shaft 18 and allowing the rotation thereof, in a known manner. - The
compressor 10 comprises a lubricating system comprising, among the various components, anoil supply duct 22 provided at least partially inside thetransmission shaft 18. Theduct 22 has a first end opening 23 exiting in the space between theshaft 18 and thepassage 20, and more in particular in afirst niche 24 in the form of annular recess on the surface of theshaft 18, i.e. extending all around the shaft. Thefirst niche 24 is provided in a position in correspondence of the two facing ends of the two anti-friction bushings 21. These ends are put over the firstannular niche 24. Theduct 22 allows lubricating the anti-friction bushings 21 and theshaft 18. - The
oil supply duct 22 comprises a second end opening 25 directly exiting on the surface of theshaft 18, in contact with the first anti-friction bushing 21A. - A second
annular niche 26 is provided on the surface of theshaft 18, in a position between the end of thepassage 20 facing thesecond chamber 13 and the first end opening 23 of theduct 22. In this example, also thesecond niche 26 is an annular recess provided on the surface of theshaft 18 and extends all around the shaft. - It should be noted that the first end opening 23 of the
duct 22 does not exit in the second niche, it directly exits outside thesecond niche 26. - On the surface of the
support portion 19, below the transmission shaft, and in particular on the inner surface of thepassage 20, adischarge channel 27 is provided for discharging the oil, operatively connected to thesecond niche 26 and theoil box 12A. - In particular, for example, the
channel 27 has three closing sides formed by the body of the support portion (as provided thereon) and a fourth side closed by means of the second anti-friction bushing 21B and the first anti-friction bushing 21A. - The
discharge channel 27 and thesecond niche 26 are directly connected by means of a throughhole 30 provided through the second anti-friction bushing 21B. - In other examples, the
oil discharge channel 27 may be provided laterally to the shaft, or, in less preferred embodiments, above the shaft. -
FIG. 3 shows a variant of the central area of the compressor according to the invention, where both the first niche, now indicated withnumber 124, and the second niche, now indicated withnumber 126, are provided on the second anti-friction bushing 21B, thus avoiding to excessively working the surface of theshaft 18. - Moreover, in this example, the
first niche 124 is closed only by means of the second bushing 21B. In other examples, thefirst niche 124 may be closed only by means of the first bushing 21A. - Obviously, examples may be also provided, wherein the first niche is provided on the first or the second bushing and the second niche is provided on the shaft, or vice versa.
- At the end of the
passage 20 facing thesecond chamber 13, aseat 31 is provided for positioning aring 32 limiting the oil leakage towards thesecond chamber 13, i.e. the ring is provided in opposite position to the first end opening of the oil duct with respect to thesecond niche 26. - From an operational viewpoint, the lubricating oil is supplied, under pressure, in the
oil supply duct 22. The oil achieves the first and the second end opening, and is distributed between the bushings 21 and the inner surface of thepassage 20 and theshaft 18. When the oil achieves thesecond niche 26, it loses pressure and passes into thedischarge channel 27, for being discharged into theoil box 12A. - With this configuration of the area where the bushings/bronze bushes supporting the transmission shaft of the compressor are housed, the leakage of oil towards the second chamber, i.e. towards the electric motor, is greatly reduced, with great advantage of the efficiency of the system.
- It is understood that what is illustrated purely represents possible non-limiting embodiments of the invention, which may vary in forms and arrangements without departing from the scope of the concept on which the invention is based. Any reference numerals in the appended claims are provided for the sole purpose of facilitating the reading thereof in the light of the description hereinbefore and the accompanying drawings and do not in any way limit the scope of protection.
Claims (11)
1. A compressor for cooling systems and/or air conditioning systems and/or heat pumps, of the reciprocating type, the compressor comprising
a casing, inside which two chambers are defined, respectively a first chamber and a second chamber
a compression section, the first chamber corresponding to the compression section, which compression section comprises at least one compression piston, a corresponding slider-crank mechanism for moving the piston and an oil box;
a motor of the compressor, wherein the second chamber is for the motor of the compressor;
a transmission shaft operatively connected to said motor and to said slider-crank mechanism;
a support portion of said transmission shaft, said chambers being separated by means of the support portion of said transmission shaft, said support portion having a passage for said shaft;
at least one anti-friction bushing supporting said shaft, said at least one anti-friction bushing supporting said transmission shaft;
an oil supply duct provided at least partially inside said transmission shaft, the oil supply duct having an end opening exiting in the space between said shaft and said passage so as to allow lubrication of said at least one anti-friction bushing and said shaft;
a niche provided in a position comprised between the end of said passage facing said second chamber and said end opening of said oil supply duct; and
a discharge channel operatively connected to said niche and to said oil box, so that oil lubricating said at least one anti-friction bushing and coming from said end opening is depressurized and adapted to come back at least partially into said oil box, thus eliminating or limiting an amount of oil achieving said second chamber with the motor.
2. The compressor of claim 1 , wherein said niche is provided on a surface of said transmission shaft or on a surface of said at least one anti-friction bushing, facing said shaft; and said niche comprises an annular recess or a niche extending all around an axis of said shaft.
3. The compressor of claim 1 , wherein said discharge channel is provided on an inner surface of said passage.
4. The compressor of claim 1 , wherein said discharge channel and said niche are directly connected by means of a through hole provided through said at least one anti-friction bushing.
5. The compressor of claim 1 , wherein said discharge channel is provided on a surface of said support portion and has three closing sides formed by said support portion and a fourth side closed by said at least one anti-friction bushing.
6. The compressor of claim 1 , wherein said at least one end opening of the oil supply duct exits outside said niche operatively connected to said discharge channel; said niche being preferably open on said discharge channel.
7. The compressor of claim 1 , further comprising a ring for limiting the oil leakage, provided around said shaft in a position opposite to said at least one end opening of the oil duct and with respect to said niche.
8. The compressor of claim 7 , wherein said oil leakage limiting ring is arranged in a seat provided at the end of said passage facing said second chamber.
9. The compressor of claim 1 , comprising two said anti-friction bushings arranged in series after each other in said passage.
10. The compressor of claim 1 , comprising a further niche where a said end opening exits, provided in the form of annular recess on said shaft, or a further niche extending all around said shaft.
11. The compressor of claim 1 , further comprising a further end opening directly exiting on a surface of said shaft into contact with said at least one anti-friction bushing.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT201800010888 | 2018-12-07 | ||
PCT/IB2019/060475 WO2020115694A1 (en) | 2018-12-07 | 2019-12-05 | Compressor |
Publications (1)
Publication Number | Publication Date |
---|---|
US20220025876A1 true US20220025876A1 (en) | 2022-01-27 |
Family
ID=65861534
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/311,566 Pending US20220025876A1 (en) | 2018-12-07 | 2019-12-05 | Compressor |
Country Status (4)
Country | Link |
---|---|
US (1) | US20220025876A1 (en) |
EP (1) | EP3891395A1 (en) |
CN (1) | CN113167265B (en) |
WO (1) | WO2020115694A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3162360A (en) * | 1962-05-14 | 1964-12-22 | Carrier Corp | Compressor venting system |
US3248044A (en) * | 1964-09-28 | 1966-04-26 | Lennox Ind Inc | Refrigerant compressor lubrication arrangement |
US4854829A (en) * | 1987-03-16 | 1989-08-08 | Franco Stanzani | Structure for motor-compressor units used with refrigerant fluids |
US5591011A (en) * | 1995-09-18 | 1997-01-07 | Carrier Corporation | Multi-refrigerant compressor |
US20080025658A1 (en) * | 2005-11-14 | 2008-01-31 | Brp-Rotax Gmbh & Co. Kg | Friction-bearing assembly for a rotating shaft |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1156598A (en) * | 1956-07-31 | 1958-05-19 | Pour Tous App Mecaniques Sa | Improvement in the lubrication of semi-hermetic compressors |
US6599103B2 (en) * | 2000-12-14 | 2003-07-29 | Gardner Denver | Locomotive air compressor with outboard support bearing |
US6609899B1 (en) * | 2000-12-14 | 2003-08-26 | Gardner Denver, Inc. | Locomotive air compressor with outboard support bearing |
US20080169157A1 (en) * | 2002-12-02 | 2008-07-17 | Wyker Christopher A | Lip seal lubrication reservoir and method of level control |
ITFI20070008A1 (en) * | 2007-01-17 | 2008-07-18 | Dorin Mario Spa | ALTERNATIVE MOTOR-COMPRESSOR OF A SEMI-HERMETIC TYPE. |
DE102009006040A1 (en) * | 2009-01-24 | 2010-07-29 | Bock Kältemaschinen GmbH | compressor |
-
2019
- 2019-12-05 WO PCT/IB2019/060475 patent/WO2020115694A1/en unknown
- 2019-12-05 EP EP19831908.9A patent/EP3891395A1/en not_active Withdrawn
- 2019-12-05 US US17/311,566 patent/US20220025876A1/en active Pending
- 2019-12-05 CN CN201980080808.6A patent/CN113167265B/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3162360A (en) * | 1962-05-14 | 1964-12-22 | Carrier Corp | Compressor venting system |
US3248044A (en) * | 1964-09-28 | 1966-04-26 | Lennox Ind Inc | Refrigerant compressor lubrication arrangement |
US4854829A (en) * | 1987-03-16 | 1989-08-08 | Franco Stanzani | Structure for motor-compressor units used with refrigerant fluids |
US5591011A (en) * | 1995-09-18 | 1997-01-07 | Carrier Corporation | Multi-refrigerant compressor |
US20080025658A1 (en) * | 2005-11-14 | 2008-01-31 | Brp-Rotax Gmbh & Co. Kg | Friction-bearing assembly for a rotating shaft |
Also Published As
Publication number | Publication date |
---|---|
CN113167265B (en) | 2023-02-17 |
CN113167265A (en) | 2021-07-23 |
EP3891395A1 (en) | 2021-10-13 |
WO2020115694A1 (en) | 2020-06-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10527041B2 (en) | Compressor having oil recovery means | |
US20080240954A1 (en) | Rotary compressor | |
US3215341A (en) | Refrigerating apparatus | |
WO2007077856A1 (en) | Compressor | |
KR100523426B1 (en) | Compressor and lubrication method thereof | |
US4968223A (en) | Gas and oil cooling system for a hermetic compressor | |
KR101983495B1 (en) | A Rotary Compressor Having A Groove For Lubricating The Eccentric Part | |
US20220025876A1 (en) | Compressor | |
JP2013072365A (en) | Compressor | |
US6402480B1 (en) | Lubrication passage for swash plate type compressor | |
CN111720312B (en) | Rotary compressor and refrigeration cycle system | |
CN213981182U (en) | Movable scroll assembly and scroll compressor comprising same | |
KR102073110B1 (en) | Discharge check valve for variable swash plate compressor | |
KR101646044B1 (en) | Hermetic compressor and refrigerator using the same | |
CN113557359B (en) | Vacuum pump and vehicle | |
US1795445A (en) | Reciprocating compressor | |
CN102439313A (en) | Compressor, in particular a radial piston compressor for carbon dioxide as a refrigerant | |
US20150300711A1 (en) | Compressor | |
JPH02264189A (en) | Horizontal type rotary compressor | |
CN116906328B (en) | Integral type swing rotor formula pump body subassembly | |
US20130101443A1 (en) | Variable Capacity Compressor | |
KR102407092B1 (en) | Electric compressor for vehicle | |
WO2004005713A1 (en) | Piston for a hermetic compressor | |
US20180245592A1 (en) | Lubricated automotive vacuum pump | |
CN220581266U (en) | Swing rotor structure and integrated swing rotor pump body assembly |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: OFFICINE MARIO DORIN S.P.A., ITALY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DALLAI, MAURO;DORIN, MARIO;REEL/FRAME:056457/0381 Effective date: 20210603 |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: NON FINAL ACTION MAILED |