System for delivering lubricating oil in a compressor

Abstract

The present invention relates to a system for conveying lubricating oil in a compressor, wherein: a rotating shaft (3) has at least one recess (35) extending on a portion of the rotating surface (33) in contact with the inner surface (11) of the rotor (1) and at least one flow restriction orifice (34) communicating with the inner region of the rotating shaft (3) and the recess (35); the rotor (1) comprises a circumferential channel (12) and at least one radial channel (13) extending through the inner wall (11) of the rotor (1); the radial channel (13) is arranged around the circumferential channel (12); the circumferential channel (12) and the radial channel (13) communicate with the recess (35); the circumferential channel (12), the radial channel (13) and the recess (35) convey oil for cooling the upper part of the rotor (1) and the stator (2).

Description

Technical Field

[0001] The present invention relates to a compressor lubricating oil delivery system, the system using a configuration applied to a rotating shaft and an electric motor rotor to provide oil delivery for the purpose of lubricating the bearings of the rotating shaft and cooling the upper region of the coils of the electric motor. Background Technology

[0002] As those skilled in the art will know, hermetic compressors (typically reciprocating) utilize lubricating oil to reduce friction and wear between moving parts, particularly the moving parts of the functional compression unit integrated into the hermetic compressor, such as eccentric shafts, central rotating shafts, support bearings, etc. The lubricating oil is typically stored in a reservoir located inside the sealed housing.

[0003] In this sense, the lubricating oil stored in the lower part of the hermetic compressor housing must be delivered to the moving elements of the compression unit (moving parts) of the integrated hermetic compressor. Therefore, this lubricating oil is usually delivered or pumped to the area where the oil is needed by the movement of the compressor's own rotating shaft.

[0004] like Figure 1 As shown, the compressor includes a housing 8 and an electric motor. The housing is typically sealed, and the electric motor is formed by a rotor 1 and a stator 2. Additionally, a rotating shaft 3 operates in conjunction with the rotor 1 of the electric motor; the rotor 1 includes at least one inner wall 11 facing the rotating shaft 3. Notably, an interference assembly is typically present between the rotor 1 and the rotating shaft 3 to enable the transmission of torque generated by the electric motor to the compression mechanism.

[0005] Additionally, a compressor housing 4 is provided to partially accommodate the rotating shaft 3. An oil pump 6 is connected to the shaft-rotor assembly and is partially immersed in an oil tank 7 located at the bottom of the compressor housing 8.

[0006] For the proper functioning of the compressor's mechanical system, the rotating shaft 3 is equipped with radial bearings, such as radial bearings 5a and 5b, which are arranged at different positions relative to the rotating shaft 3. The radial bearings 5a and 5b must be lubricated by lubricating oil from the oil tank 7.

[0007] To understand the lubrication systems commonly used in hermetic compressors, just as it is possible to... Figure 2 As seen in more detail, the rotating shaft 3 can be divided into a lower region 31, an upper region 32, and a rotating region 33. The lower region 31 serves to accommodate the oil pump 6 disposed in the oil tank 7 via interference; the rotating region 33, defined by the housing of the shaft in the body 4 and the portion of the interfering rotor 1, includes a pipe 36, an opening 37, and an external helical channel 38, which together supply lubricating oil to the radial bearings 5a and 5b located at the ends of the rotating region 33 and the upper region 32 of the rotating shaft 3, respectively.

[0008] In the prior art, lubricating oil is typically delivered via a lubricating oil pump, which works in conjunction with the rotating shaft of a compressor that delivers oil using mechanical resistance. To allow lubricating oil to enter the rotating shaft 3, the oil pump 6 has an orifice 39 in its lower region and uses centrifugal force to lift the oil until it reaches the conduit 36, further accelerating the fluid. A helical channel 38 located outside the rotating region 33 provides a mechanical pumping function by dragging the housing of the shaft within the compressor body 4.

[0009] The secondary function of lubricating oil is to remove heat from electromechanical components and help transfer heat across the sealed housing to the environment outside the compressor. In most compressors, this oil flow is a result of excess lubricating oil being pumped to the bearings and then naturally returning to the bottom of the sealed housing. However, some oil flow can also be directed to specific points on the motor to promote additional cooling, thereby reducing the temperature of these components and extending the overall life of the compressor.

[0010] For example, US9217434, published on October 18, 2012, entitled "COMPRESSOR HAVING DRIVE SHAFT WITHFLUID PASSAGES," discloses a compressor including a rotating shaft with multiple oil delivery channels located inside the shaft. The channels described in this document deliver lubricating oil from an oil tank located at the bottom of the compressor housing to the top of the motor; this flow is specifically used for cooling the motor coils. Notably, the same oil flow through these internal channels is also used for lubricating the bearings supporting the moving parts of the compressor.

[0011] However, it has been observed that using oil flow through the internal channels of the rotating shaft for both cooling and lubrication purposes can lead to oil supply failures, resulting in bearing lubrication problems. Furthermore, pumping pressure may decrease because the oil flow in the internal channels is diffused and diverted along the rotating shaft.

[0012] Furthermore, document KR547434, published on October 24, 2005, entitled "A COOLING STRUCTURE OF END-COIL FORHERMETIC COMPRESSOR," describes a compressor equipped with a rotor, shaft, and channel that carries lubricating oil from a pumping element. A recessed element is provided, comprising a series of radial openings, the purpose of which is to distribute the flow of lubricating oil in the lower part of the stator. The purpose of the lubricating oil flow is to reduce the temperature / heat carried away from the coils.

[0013] However, the solution proposed in this document does not allow for cooling of the upper part of the coil, meaning this situation will continue without additional oil flow. The durability of the electrical insulator will continue to be determined by the hottest spot in the top coil.

[0014] Furthermore, US9617985, published on October 31, 2013, entitled "HERMETIC RECIPROCATING COMPRESSOR," describes a compressor including a shaft with a helical channel that allows lubricating oil to rise to the top of the shaft. Additionally, an orifice is provided at the upper part of the shaft, communicating with an eccentric portion. A key feature of this document is that the external helical channel communicates directly with an oil pump mounted at the bottom of the shaft, its sole purpose being to provide lubricating oil to the sealed compressor bearings.

[0015] However, the document does not describe a system in which the external channel of the shaft cooperates with the channel system of the rotor to ensure that oil flows to the bearing without impairing the amount of oil supplied to the bearing by the pumping system.

[0016] Furthermore, US3560116, published on February 2, 1971, entitled "ENCLOSED MOTOR-COMPRESSOR, PARTICULARLY ASMALL REFRIGERATION MACHINE," discloses a channel 35 for supplying oil from chamber 49 toward the upper coil end 18. Channel 35 extends longitudinally at a rearward angle. However, channel 35 is not a radial channel and is not arranged around the circumferential channel 49, but rather communicates with channel 49 in the longitudinal direction.

[0017] Furthermore, document US4400142, entitled "MOTOR-COMPRESSOR UNIT" published on August 23, 1983, discloses a rotor having a circumferential channel and a channel communicating with the circumferential channel in the longitudinal direction, but not surrounding the circumferential channel. Although the document appears to include a recess 82, it does not extend to the portion of the rotating surface that contacts the inner surface of the motor rotor.

[0018] Furthermore, US3276677, published on October 4, 1966, entitled "LUBRICATION SYSTEM FOR COMPRESSOR SHAFT JOURNALS," discloses a rotor having a circumferential channel 30 and a channel communicating with the circumferential channel 30 in the longitudinal direction, but not surrounding the circumferential channel. Although the document appears to include a recess 29, it does not extend to the portion of the rotating surface that contacts the inner surface of the rotor 21 of the motor. Summary of the Invention

[0019] The purpose of this invention is to provide a lubricating oil delivery system that avoids the problems of the prior art.

[0020] This objective is achieved by a system for delivering lubricating oil in a compressor, the system comprising:

[0021] case;

[0022] Electric motors including rotor and stator,

[0023] The rotor includes at least one inner wall;

[0024] The oil pump and oil tank are housed within the casing;

[0025] Rotating shaft as a component of an electric motor;

[0026] A compressor housing capable of at least partially accommodating a rotating shaft;

[0027] The rotating shaft is supported by at least one radial bearing;

[0028] The rotating shaft includes a lower region, an upper region, and a rotating surface;

[0029] The rotating shaft has at least one recess and at least one flow-limiting hole, the recess extending on a portion of the rotating surface in contact with the inner surface of the rotor, and the flow-limiting hole communicating with the internal region of the rotating shaft and the recess;

[0030] The rotor includes a circumferential channel and at least one radial channel, the radial channel extending through the inner wall of the rotor;

[0031] Radial channels are arranged around circumferential channels;

[0032] The circumferential channel and the radial channel are connected to the recess;

[0033] Circumferential channels, radial channels, and recesses deliver oil for cooling the upper part of the rotor and stator.

[0034] Appropriately, the system according to the invention includes the fact that the recess has a spiral shape.

[0035] Furthermore, the system according to the invention includes the fact that the outer diameter of the circumferential channel is smaller than the outer diameter of the rotating shaft housed in the compressor body.

[0036] Furthermore, the system according to the invention includes the fact that a circle is inscribed inside the radial channel outlet, the diameter of which is larger than the outer diameter of the heat-dissipating rotating shaft housed in the compressor body.

[0037] Furthermore, the system according to the invention includes the fact that the recess has an annular shape and the rotor does not require a circumferential channel, while the radial channel communicates directly with the annular recess.

[0038] Furthermore, the system according to the invention includes the fact that the rotating shaft does not require a recess, and the flow-limiting orifice is directly connected to the circumferential channel.

[0039] The present invention also provides a system for delivering lubricating oil in a compressor, the system comprising:

[0040] case;

[0041] Electric motors including rotor and stator,

[0042] The rotor includes at least one inner wall;

[0043] The oil pump and oil tank are housed within the casing;

[0044] Rotating shaft as a component of an electric motor;

[0045] A compressor housing capable of at least partially accommodating a rotating shaft;

[0046] The rotating shaft is supported by at least one radial bearing;

[0047] The rotating shaft includes a lower region, an upper region, and a rotating surface;

[0048] The rotor has at least one radial channel arranged around the circumferential channel;

[0049] The circumferential channel extends on at least a portion of the inner wall of the rotor;

[0050] The circumferential channel is located midway between the upper part of the oil pump and the lower part of the rotating shaft; and

[0051] The circumferential and radial channels carry oil used to cool the upper part of the rotor and stator.

[0052] Appropriately, the system according to the invention includes the fact that a circle is inscribed inside the radial channel outlet, the diameter of which is larger than the outer diameter of the rotating shaft housed in the compressor body.

[0053] Furthermore, the system according to the invention includes the fact that there is a partial juxtaposition between the inlet of the radial channel and the outer diameter of the circumferential channel.

[0054] Therefore, the main objective of this invention is to disclose a lubricating oil delivery system in a hermetic compressor, which uses a configuration for the rotating shaft and the rotor for the electric motor.

[0055] Furthermore, the present invention also aims to disclose a lubricating oil delivery system in a hermetic compressor, which allows for the delivery of oil for the purpose of lubricating support bearings and for the purpose of cooling the upper region of the motor coils.

[0056] Finally, the object of the present invention is to provide a lubricating oil delivery system in a hermetic compressor that does not experience lubricating oil flow failure or a drop in lubricating oil pumping pressure. Attached Figure Description

[0057] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0058] Figure 1 A cross-sectional view of a prior art compressor is shown, featuring a conventional oil pumping system specifically designed for compressor bearings.

[0059] Figure 2 A perspective view of a prior art rotating shaft is shown, featuring an oil pumping system specifically designed for compressor bearings.

[0060] Figure 3 A cross-sectional view of a first embodiment of the compressor is shown, illustrating a lubricating oil delivery system including an arrangement for cooling engine coils through injection holes.

[0061] Figure 4 A perspective view of a first embodiment of the rotor-rotor shaft assembly (with the rotor in cross section) according to the invention is shown, illustrating the helical recesses outside the shaft and how they cooperate with the channels located on top of the rotor.

[0062] Figure 5 This is another perspective view of a first embodiment of the shaft-rotor assembly (with the rotor in a horizontal section) according to the invention, showing the circumferential and radial channels and how they cooperate with the ends of the outer helical recess of the shaft.

[0063] Figure 6 A perspective view of a first embodiment of the rotating shaft according to the invention is shown, showing a recess on the rotating surface.

[0064] Figure 7 A front view of a first embodiment of the rotating shaft is shown, having a helical recess at the bottom for cooling the motor and a helical recess at the top of the rotating region of the shaft for lubricating the bearing. According to the invention, a flow-limiting orifice for cooling the motor can also be seen at the beginning of the helical cavity in the lower region of the shaft.

[0065] Figure 8 A right-side view of a first embodiment of the rotating shaft according to the invention is shown, illustrating the oil supply hole of a helical recess of a bearing at the top of the rotating region of the shaft for lubrication.

[0066] Figure 9A rear view of a first embodiment of the rotating shaft is shown, having a helical recess at the bottom for cooling the motor and a helical recess at the top of the rotating region of the shaft for lubricating the bearing. According to the invention, a second flow-limiting orifice for cooling the motor can also be seen at the beginning of a second helical cavity in the lower region of the shaft.

[0067] Figure 10 A left-side view of a first embodiment of the rotating shaft according to the invention is shown, illustrating an oil degassing hole for the bearing at the end of the shaft region and the rotor interface.

[0068] Figure 11 A top view and a vertical cross-sectional view of a first embodiment of the rotor according to the invention are shown. The top view shows the radial and circumferential channels at the top, and the vertical cross-sectional view shows the internal structure of the radial and circumferential channels of the rotor.

[0069] Figure 12 A perspective view of a second embodiment of the shaft-rotor assembly according to the invention is shown, which, instead of having an upward spiral recess on the rotating shaft for motor cooling, has a flow-limiting orifice and a recess communicating circumferentially with the rotor.

[0070] Figure 13 A perspective view of a second embodiment of the rotating shaft according to the invention is shown, wherein a circumferential channel is constructed on the outer surface of the rotating shaft.

[0071] Figure 14 A front view of a second embodiment of the rotating shaft is shown, featuring a circumferential channel at the bottom for cooling the motor and a helical recess at the top of the rotating region of the shaft for lubricating the bearing. According to the invention, a flow-limiting orifice for cooling the motor can also be seen at the center of the circumferential channel in the lower region of the shaft.

[0072] Figure 15 A right-side view of a second embodiment of the rotating shaft according to the invention is shown, illustrating the oil supply hole of a helical recess for lubricating the bearing at the top of the rotating region of the shaft.

[0073] Figure 16 A rear view of a second embodiment of the rotating shaft is shown, having a circumferential channel at the bottom for cooling the motor and a helical recess at the top of the rotating region of the shaft for lubricating the bearing. According to the invention, a second flow-limiting hole for cooling the motor can also be seen at the middle of the circumferential channel in the lower region of the shaft.

[0074] Figure 17 A left-side view of a second embodiment of the rotating shaft according to the invention is shown, illustrating an oil degassing hole for the bearing at the end of the shaft region and the rotor interface.

[0075] Figure 18 A top view and a cross-sectional view of a second embodiment of the rotor according to the invention are shown, the top view having upward radial channels, and the cross-sectional view showing the internal arrangement of these channels.

[0076] Figure 19 A perspective view of a third embodiment of the shaft-rotor assembly according to the invention is shown, in which there is no cavity in the shaft for cooling the motor, but only flow-limiting holes for oil passages.

[0077] Figure 20 A perspective view of a third embodiment of the rotating shaft according to the invention is shown, having only a flow-limiting orifice for the oil passage.

[0078] Figure 21 A front view of a third embodiment of a rotating shaft according to the invention is shown, having a flow-limiting hole at the bottom and a helical recess at the top of the rotating region of the shaft for delivering oil to the bearing.

[0079] Figure 22 A right-side view of a third embodiment of the rotating shaft according to the invention is shown, illustrating the oil supply hole of the helical recess of the bearing at the top of the rotating region of the shaft for lubrication.

[0080] Figure 23 A rear view of a third embodiment of the rotating shaft according to the invention is shown, having a second flow-limiting hole at the bottom for cooling the motor and a helical recess at the top of the rotating region of the shaft for lubricating the bearing.

[0081] Figure 24 A left-side view of a third embodiment of the rotating shaft according to the invention is shown, illustrating an oil degassing hole for the bearing at the end of the shaft region and the rotor interface.

[0082] Figure 25 A top view of a third embodiment of the rotor is shown, wherein the circumferential channel is located at the midpoint of the flow-limiting orifice relative to the axis of rotation, and the upward radial channel is responsible for allowing oil for cooling the motor to pass through up to the top of the rotor. A cross-sectional view is also presented to facilitate understanding of the internal structure of the rotor according to the invention.

[0083] Figure 26 A cross-sectional view of a compressor of an electric motor cooling system through an oil injection port according to a fourth embodiment is shown, in which an oil pump is connected to a rotor according to the invention.

[0084] Figure 27 A perspective view of a fourth embodiment of the shaft-rotor-oil pump assembly according to the invention is shown, wherein a portion of the cutout is applied to the rotor and its internal structure is shown, as well as the relative positions of the circumferential and ascending radial channels with respect to the rotating shaft and the oil pump.

[0085] Figure 28 A front view of a fourth embodiment of the shaft-rotor-oil pump assembly is shown, with a partial cutout applied to the rotor to reveal its internal structure and the relative positions of the circumferential and ascending radial channels with respect to the rotating shaft and the oil pump. Details indicating the height "h" of the circumferential channel are provided, which now also defines the oil flow for cooling the motor coils according to the invention.

[0086] Figure 29 A horizontal section is shown of a fourth embodiment of the shaft-rotor oil pump assembly according to the invention, located directly above the rotor circumferential channel. An alternative configuration for the transition between the circumferential channel and the rising radial channel is shown in detail. This configuration can be added to accommodate the oil flow for cooling the motor coils. Detailed Implementation

[0087] Detailed description of the invention

[0088] According to the overall objective of the present invention, in addition to a conventional lubricating oil delivery system for bearings and moving parts, a lubricating oil delivery system for cooling the upper coil of the electric motor is also provided in the hermetic compressor, such as... Figure 3 As shown.

[0089] according to Figure 4 The lubricating oil delivery system of the present invention is defined by the fact that the rotating shaft 3 includes at least one recess 35 and a flow-limiting orifice 34, the recess 35 extending on a portion of the rotating surface 33, and the orifice 34 communicating the recess 35 with the internal region of the rotating shaft 3. The recess 35 and the flow-limiting orifice 34 are responsible for transferring a portion of the lubricating oil from the oil pump 6 from the internal region of the rotating shaft 3.

[0090] The recess 35 typically defines a groove formed in the rotating surface 33 of the rotating shaft 3, which is partially closed by the inner wall 11 of the rotor 1. Therefore, in order to deliver lubricating oil, the rotating surface 33 interacts with the inner wall 11 of the rotor 1, forming a pumping mechanism operated by centrifugal force according to the operation of the compressor.

[0091] according to Figure 4 and Figure 5 The rotor 1 further includes a circumferential channel 12 and at least one radial channel 13, the radial channel 13 extending through the inner wall 11 of the rotor 1. The circumferential channel 12 and the radial channel 13 cooperate to equally distribute the lubricating oil flow provided by the recess 35, regardless of the angular position of the rotor 1 relative to the axis of rotation 3 and therefore relative to the recess 35. Figure 11The maximum diameter of the circumferential channel 12 must be smaller than the minimum outer diameter of the rotating shaft 3 housed in the compressor body 4 to limit the vertical displacement of the rotating shaft 3-rotor 1 assembly relative to the compressor body 4. On the other hand, the length of the radial channel 13 must be determined in such a way that the inner diameter of its outlet is greater than the same outer diameter of the rotating shaft 3 housed in the compressor body 4 to ensure that oil flows unrestricted through the space 41 formed between the aluminum ring 14 of the rotor 1 and the compressor body 4, even if the vertical clearance between the rotor 1 and the rotating shaft 3 housed in the compressor body 4 is too small.

[0092] In a first preferred embodiment, the recess 35 has a helical shape and extends spirally on the partially rotating surface 33. The recess must open toward the circumferential channel 12. The circumferential channel 12 also communicates with at least one radial channel 13.

[0093] The number of recesses 35 and flow-limiting holes 34 depends on the cooling requirements of the stator 2, in which the motor coils are housed. Figures 6 to 10 Several views of the rotating shaft 3 are shown. Similarly, the number of radial channels 13 in the rotor must allow oil to flow freely into space 41 and, to some extent, provide the rotor with symmetry to maintain its balance, such as... Figure 11 As shown.

[0094] In a second possible implementation, such as Figures 12 to 17 As shown, the recess 35 has an annular shape and extends around the rotating surface 33. In this configuration, at least one upward radial channel 13 is provided in the inner wall 11 of the rotor 1 and communicates with the recess 35 of the rotating shaft 3. In this case, the rotor 1 may or may not have a circumferential channel 12 on its inner wall. Figure 12 The rotor 1 is shown with only radial channels 13. A flow-limiting orifice 34 is responsible for diverting a portion of the oil pumped by the pump 6 to an annular recess 35, which distributes the oil flow until it finds the upward radial channels 13, exits the space 41, and is finally thrown towards the coils of the stator 1 at the top of the motor. Furthermore, Figure 18 The construction of rotor 1 for implementing this second embodiment is shown.

[0095] In the third alternative implementation scheme, such as Figures 19 to 25 As shown, there is no recess 35 on the rotating surface 33; only the flow-limiting hole 34 is retained for internal communication with the rotating shaft 3. In this embodiment, at least one longitudinal channel 13a is provided on the inner wall 11 of the rotor 1, which communicates with a circumferential channel 12 located on the rotor 1 at the same height as the flow-limiting hole 34. The circumferential channel 12 provided on the inner wall of the rotor 1 ensures that a specific angular positioning of the rotor 1 and the rotating shaft 3 is not necessary for aligning the flow-limiting hole 34 with the radial channel 13. Figure 26Rotor 1 in this third embodiment is shown.

[0096] In any configuration of rotor 1, it is preferable to apply two or more radial channels 13 to the inner wall 11. The channels 13 are arranged to ensure the symmetry of rotor 1 and avoid imbalance problems. These radial channels 13 can and should follow the rotation angle of the aluminum bars of rotor 1 cage and be obtained directly from the stamping of rotor 1 blades.

[0097] The aforementioned implementation scheme can be applied to compressors in which the oil pump 6 is mounted to the lower region 31 of the rotating shaft 3 by internal or external interference, or even by interference with the inner wall 11 of the rotor 1, and the oil for cooling the coils is deflected by the flow-limiting hole 34 provided on the rotating shaft 3.

[0098] The fourth implementation plan is shown in Figure 26 This embodiment is only used in hermetic compressors where the oil pump 6 is mounted with interference relative to the inner wall 11 of the rotor 1. In this embodiment, the rotating shaft 3 does not require the flow-limiting orifice 34, and the original oil pumping system can be retained. Thus, the oil diversion for cooling the motor coils occurs through the circumferential channel 12 in the section of the inner wall 11 between the upper part of the oil pump 6 and the lower region 31 of the rotating shaft 3. The circumferential channel has a height h, such as... Figure 28 As shown. The circumferential channel 12 communicates with at least one upward longitudinal channel 13a, which carries the oil flow into the space 41 and then to the coil located at the top of the stator 1 of the motor, as shown. Figure 27 As shown.

[0099] The circumferential channel 12 can be directly obtained by stacking electrical steel sheets. However, this would result in a height h that is an integer multiple of the blade thickness of the electric rotor steel. For example, if this height h causes the oil flow for cooling the motor coils to deviate, thus affecting the flow rate required to lubricate the radial bearings 5a and 5b, additional constraints could be provided, for example, by juxtaposing a portion of the outer diameter of the circumferential channel 12 with the diameter of the upward longitudinal channel 13a. Figure 29 The dimensions (dr) are shown in the details.

[0100] It is important to note that the sole purpose of the above description is to illustrate specific exemplary embodiments of the present invention.

Claims

1. A system for delivering lubricating oil in a compressor, comprising: case; Electric motors including rotor and stator, The rotor includes at least one inner wall; The oil pump and oil tank are housed within the casing; Rotating shaft as a component of an electric motor; A compressor housing capable of at least partially accommodating a rotating shaft; The rotating shaft is supported by at least one radial bearing; The rotating shaft includes a lower region, an upper region, and a rotating surface; The rotating shaft is characterized in that it has at least one recess and at least one flow-limiting hole, the recess extending on a portion of the rotating surface in contact with the inner surface of the rotor, the recess being at least partially closed by the inner wall of the rotor to form a centrifugal pump chamber; the flow-limiting hole communicates with the internal region of the rotating shaft and the recess, transferring a portion of the oil flow from the internal region to the recess; The rotor includes a circumferential channel and at least one radial channel, the radial channel extending through the inner wall of the rotor; Radial channels are arranged around circumferential channels; The circumferential channel and the radial channel communicate with the recess, the circumferential channel being configured to receive oil from the recess and distribute oil to the at least one radial channel, regardless of the angular position between the rotating shaft and the rotor; Circumferential channels, radial channels, and recesses deliver oil for cooling the upper part of the rotor and stator.

2. The system for delivering lubricating oil in a compressor according to claim 1, characterized in that, The recess has a spiral shape.

3. The system for delivering lubricating oil in a compressor according to claim 1, characterized in that, The outer diameter of the circumferential channel is smaller than the outer diameter of the rotating shaft housed in the compressor body.

4. The system for delivering lubricating oil in a compressor according to claim 1, characterized in that, The radial channel outlet is inscribed in a circle, the diameter of which is larger than the outer diameter of the rotating shaft housed in the compressor body.

5. A system for delivering lubricating oil in a compressor, comprising: case; Electric motors including rotor and stator, The rotor includes at least one inner wall; The oil pump and oil tank are housed within the casing; Rotating shaft as a component of an electric motor; A compressor housing capable of at least partially accommodating a rotating shaft; The rotating shaft is supported by at least one radial bearing; The rotating shaft includes a lower region, an upper region, and a rotating surface; The rotor is characterized in that it has at least one radial channel arranged around the circumferential channel; The circumferential channel extends on at least a portion of the inner wall of the rotor; The circumferential channel is located in the middle between the upper part of the oil pump and the lower part of the rotating shaft. The circumferential and radial channels carry oil for cooling the upper parts of the rotor and stator; and There is a partial juxtaposition between the inlet of the radial channel and the outer diameter of the circumferential channel.

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