CN219281976U - Shafting oil content structure, compressor and refrigerating device - Google Patents

Abstract

The utility model discloses a shafting oil component structure, a compressor and a refrigerating device, wherein the shafting oil component structure is used for the compressor and comprises the following components: a rotating shaft provided with a main balance block; the motor is positioned below the main balance weight and connected with the rotating shaft to drive the rotating shaft to rotate; and the windshield is arranged at one end of the motor, which is close to the main balance block, and can rotate under the drive of the motor, and the windshield is provided with a central hole for the rotating shaft to pass through. The shafting oil content structure can effectively reduce the exhaust oil content of the compressor.

Description

Shafting oil content structure, compressor and refrigerating device

Technical Field

The utility model relates to the technical field of compressors, in particular to a shafting oil component structure, a compressor and a refrigerating device.

Background

In the related art, a high back pressure scroll compressor generally adopts a middle exhaust mode, refrigerant is compressed and discharged with refrigerant oil after entering a compression cavity, the oil content of exhaust gas is relatively high, and the refrigerant oil enters a refrigeration system to reduce the heat exchange efficiency, so that the oil content of exhaust gas of the compressor needs to be reduced.

Disclosure of Invention

The utility model mainly aims to provide a shafting oil content structure which aims to reduce the exhaust oil content of a compressor.

In order to achieve the above object, the shafting oil structure provided by the present utility model is used for a compressor, and the shafting oil structure includes:

a rotating shaft provided with a main balance block;

the motor is positioned below the main balance weight and connected with the rotating shaft to drive the rotating shaft to rotate; and

the wind shield is arranged at one end of the motor, which is close to the main balance weight, and can rotate under the driving of the motor, and is provided with a central hole for the rotating shaft to pass through.

In one embodiment, the motor comprises a rotor sleeved on the periphery of the rotating shaft, the windshield comprises an end plate and a coaming arranged on the periphery of the end plate, the end plate is fixed on the end face of the rotor, the coaming extends from the end plate towards one side of the main balancing block, and the center hole is formed in the end plate.

In one embodiment, the end plate is provided with fixing holes through which fasteners fixing the end plate to the rotor are passed.

In one embodiment, the rotor comprises a rotor core and a magnet arranged in the rotor core, and the end plate is provided with an oil passing hole corresponding to the magnet.

In one embodiment, fins and/or diversion trenches are arranged on the outer circumferential surface of the coaming.

In one embodiment, the rotor is provided with through holes extending along the axial direction, the through holes penetrate through two ends of the rotor, and the central hole is communicated with the through holes.

In one embodiment, the motor further comprises a stator sleeved outside the rotor, and the outer diameter of the windshield is smaller than the inner diameter of the stator;

and/or, the inner diameter size of the coaming is larger than the outer diameter size of the main balance block, and the top surface of the windshield is lower than the lower end surface of the main balance block.

In one embodiment, an auxiliary balance block is arranged at one end of the rotor, which is far away from the main balance block, and the shafting oil component structure further comprises an oil blocking cover which is covered on the periphery of the auxiliary balance block.

The utility model also proposes a compressor comprising:

a shell provided with an air suction port and an air exhaust port;

the shafting oil structure is arranged in the shell and is the shafting oil structure; and

the compression assembly is arranged in the shell and is connected with the rotating shaft.

In one embodiment, an oil pool is arranged at the bottom of the shell, an oil baffle is arranged in the shell, and the oil baffle is positioned below the motor and above the oil pool.

The utility model also provides a refrigeration device comprising the compressor.

According to the technical scheme, the wind shield is arranged at one end of the motor, which is close to the main balance weight, so that the oil-gas separation efficiency can be effectively improved, and the oil discharge rate can be reduced. Specifically, when the compressor is operated, high pressure gas generated from the compression assembly is discharged upward and impacts the top inner surface of the casing to flow downward after one oil-gas separation is formed at the top inner surface of the casing. When the air flow flows to the position below the main balance weight, the air flow is driven to rotate and separate by the high-speed rotating windshield through the windshield arranged on the motor, so that the secondary separation effect is achieved. Due to the density difference of the freezing oil and the refrigerant, the heavy freezing oil is deposited and flows downwards under the action of tangential force and gravity. Meanwhile, a negative pressure area is formed on the outer side of the wind shield when the wind shield rotates at a high speed, so that air flow can be further guided to flow downwards, and air flow which is not subjected to oil-gas separation is reduced to be directly discharged from an exhaust pipe of the compressor, so that the oil discharge rate can be effectively reduced, and the exhaust oil content of the compressor is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic cross-sectional view of an embodiment of a compressor according to the present utility model;

FIG. 2 is a schematic view of a cross-sectional structure of the compressor of FIG. 1 at another angle;

FIG. 3 is a schematic view of the windshield of the compressor of FIG. 1;

FIG. 4 is a top view of the windshield of FIG. 3;

fig. 5 is a schematic view of an assembly structure of the windshield and the rotor.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				10	Rotary shaft	312	Oil hole
11	Main balance block	32	Coaming plate
				20	Motor with a motor housing	40	Auxiliary balance block
21	Stator	50	Oil shield
				22	Rotor	60	Shell body
221	Rotor core	61	Air suction pipe
				222	Magnet	601	Suction port
223	Fastening piece	62	Exhaust pipe
				224	Through-flow hole	602	Exhaust port
30	Wind shield	70	Compression assembly
				301	Center hole	80	Oil baffle plate
31	End plate	90	Support assembly
				311	Fixing hole

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The utility model provides a shafting oil component structure.

The shafting oil structure is used for compressors, wherein the compressors include, but are not limited to, scroll compressors, rotor compressors and the like, and the shafting oil structure is mainly used for the scroll compressors for illustration.

Referring to fig. 1 and 2, in one embodiment, the compressor includes a housing 60, a rotary shaft 10, a motor 20, a compression assembly 70, and a support assembly 90. The housing 60 is provided with an air suction pipe 61 and an air discharge pipe 62. The intake pipe 61 may be provided at the top of the housing 60, the intake pipe 61 may have an intake port 601, the exhaust pipe 62 may be provided at a side of the housing 60 below the main frame and above the motor 20, and the exhaust pipe 62 may have an exhaust port 602. The lower end of the rotation shaft 10 is mounted at a certain height position in the housing 60 through a support assembly 90, and the support assembly 90 may specifically include a sub-frame, a support plate, a bearing, and the like. The upper end of the rotation shaft 10 may be supported by a main frame fixed in the housing 60. The motor 20 includes a stator 21 and a rotor 22 provided in the stator 21, the stator 21 is fixed in the housing 60, and the rotor 22 is rotatable by the stator 21. The rotor 22 is sleeved on the periphery of the rotating shaft 10, and the rotating shaft 10 is driven to rotate by the rotation of the rotor 22. In order to ensure the rotation stability of the rotation shaft 10, the rotation shaft 10 is further sleeved with a main balance block 11, and the main balance block 11 is located above the rotor 22. The compression assembly 70 is disposed at an upper end of the rotation shaft 10, and the compression assembly 70 may specifically include an orbiting scroll connected to the rotation shaft 10 and a fixed scroll cooperating with the orbiting scroll to form a plurality of compression chambers. The bottom of the compressor is provided with an oil pool for storing frozen oil, the movable scroll and the fixed scroll are provided with oil guiding holes, and high-pressure oil in the compressor can be introduced into the compression cavity through the rotating shaft 10 and discharged along with high-pressure gas. The main frame is internally provided with an oil guiding groove for discharging shafting lubricating oil, and the periphery of the main frame is provided with a through groove for guiding out high-pressure exhaust air flow.

When the compressor works, refrigerant entering from the system enters into the compression cavity of the compression assembly 70 through the air suction port 601 for compression, the refrigerating oil in the oil pool at the bottom of the compressor rises through the rotary shaft 10, the oil guiding hole of the driven vortex plate enters into the oil groove and the compression cavity of the fixed vortex plate, and finally is discharged along with high-pressure gas. The high pressure gas is discharged upward and impacts the top inner surface of the housing 60 to form a gas-oil separation at the top inner surface of the housing 60, then flows downward through a notch provided in the main frame, and finally is discharged from the side exhaust ports 602.

In order to effectively reduce the oil content of the exhaust gas of the compressor, the utility model provides a shafting oil content structure.

Referring to fig. 1 to 3, in an embodiment of the present utility model, the shafting oil structure is used for a compressor, and the shafting oil structure includes a rotating shaft 10, a motor 20 and a windshield 30. The rotating shaft 10 is provided with a main balance block 11; the motor 20 is positioned below the main balance weight 11, and the motor 20 is connected with the rotating shaft 10 to drive the rotating shaft 10 to rotate; the wind shield 30 is disposed at one end of the motor 20 near the main weight 11 and is rotatable by the motor 20, and the wind shield 30 is provided with a central hole 301 through which the rotation shaft 10 passes.

Specifically, the shafting oil structure is mounted within the housing 60 of the compressor. The rotary shaft 10 is used for being connected with a compression assembly 70 of a compressor, the motor 20 is connected with the rotary shaft 10, the rotary shaft 10 is driven to rotate by the motor 20, and the compression assembly 70 can be driven to move by the rotary shaft 10 to compress gas. By providing the main weight 11 on the rotary shaft 10, the rotational stability of the rotary shaft 10 can be ensured. The motor 20 is located below the main balance weight 11, a wind shield 30 is arranged at one end of the motor 20 close to the main balance weight 11, the wind shield 30 can be connected with the rotor 22 of the motor 20 or connected with the rotating shaft 10, and the wind shield 30 can be driven to rotate together at a high speed when the motor 20 operates.

According to the technical scheme, the wind shield 30 is arranged at one end of the motor 20, which is close to the main balance weight 11, so that the oil-gas separation efficiency can be effectively improved, and the oil discharge rate can be reduced. Specifically, when the compressor is operated, high pressure gas generated from the compression assembly 70 is discharged upward and impacts the top inner surface of the casing 60 to flow downward after one oil-gas separation is formed at the top inner surface of the casing 60. When the air flow flows to the position below the main balance weight 11, the air flow is driven to rotate and separate by the wind shield 30 which is arranged on the motor 20 and is rotated and separated at a high speed through the wind shield 30, so that the secondary separation effect is realized. Due to the density difference of the freezing oil and the refrigerant, the heavy freezing oil is deposited and flows downwards under the action of tangential force and gravity. Meanwhile, as the wind shield 30 forms a negative pressure area at the outer side when rotating at high speed, the air flow can be further guided to flow downwards, so that the air flow which is not subjected to oil-gas separation is reduced to be directly discharged from the exhaust pipe 62 of the compressor, the oil discharge rate can be effectively reduced, and the exhaust oil content of the compressor is reduced.

As shown in fig. 3, in one embodiment, the motor 20 includes a rotor 22 sleeved on the periphery of the rotating shaft 10, the wind shield 30 includes an end plate 31 and a shroud plate 32 disposed on the periphery of the end plate 31, the end plate 31 is fixed on the end surface of the rotor 22, the shroud plate 32 extends from the end plate 31 toward the main counterweight 11, and the center hole 301 is disposed on the end plate 31.

In the present embodiment, the rotor 22 of the motor 20 can drive the rotation shaft 10 to rotate, and the rotor 22 can also drive the windshield 30 to rotate. The windshield 30 has a thin-walled structure and can be formed by one-time stamping. The end plate 31 covers the end face of the rotor 22 so that the end plate 31 of the windshield 30 can be used as the end plate 31 of the rotor 22 at the same time, without an excessive cost increase. The middle portion of the end plate 31 is provided with a center hole 301 through which the rotation shaft 10 passes. Alternatively, the bore diameter of the central bore 301 is larger than the outer diameter of the rotary shaft 10. The end plate 31 and the rotor 22 may be secured together including, but not limited to, using fasteners 223, snap-fit connections, welding, and the like. The shroud 32 is provided to extend from the periphery of the end plate 31 toward the main weight 11 side so that the opening of the windshield 30 faces the main weight 11. When the rotor 22 rotates at a high speed, the coaming 32 of the windshield 30 can centrifugally throw the frozen oil to the periphery at a high speed, and a good oil-gas separation effect can be achieved.

In one embodiment, the motor 20 further includes a stator 21 sleeved outside the rotor 22, the wind shield 30 is disposed on an end surface of the rotor 22, the stator 21 is disposed around the periphery of the wind shield 30, and in order to avoid interference with the coil of the stator 21, the outer diameter of the wind shield 30 is smaller than the inner diameter of the stator 21.

The wind shield 30 is located below the main balance weight 11, in order to avoid interference with the main balance weight 11, in one embodiment, the inner diameter of the shroud 32 is larger than the outer diameter of the main balance weight 11, and the top surface of the wind shield 30 is slightly lower than the lower end surface of the main balance weight 11.

Referring to fig. 4 and 5, in order to facilitate the installation of the windshield 30 and the rotor 22, in one embodiment, the end plate 31 is provided with a fixing hole 311 through which a fastener 223 is inserted, and the fastener 223 fixes the end plate 31 to the rotor 22. Specifically, the fastener 223 may be a rivet that is inserted into the fixing hole 311 to fix the windshield 30 to the end surface of the rotor 22. Alternatively, the end plate 31 is provided with a plurality of fixing holes 311 at intervals in the circumferential direction.

As shown in fig. 4 and 5, in one embodiment, the rotor 22 includes a rotor core 221 and a magnet 222 provided in the rotor core 221, and the end plate 31 is provided with an oil passage hole 312 corresponding to the magnet 222. Specifically, the rotor core 221 is provided with a plurality of magnet slots at intervals along the circumferential direction, each magnet slot is provided with a magnet 222 therein, the end plate 31 is provided with a plurality of oil passing holes 312 at intervals along the circumferential direction, and each oil passing hole 312 is disposed corresponding to the magnet 222, so that an end surface of the magnet 222 can be exposed from the oil passing hole 312. In this way, the refrigerating oil and air flow in the windshield 30 can flow downwards from the oil passing hole 312 and enter the rotor 22 through the gap of the magnet 222, so as to cool the rotor 22, thereby effectively improving the efficiency of the motor 20 and the efficiency of the compressor. The shape of the oil passing hole 312 may be designed as a circular hole, a square hole, a kidney-shaped hole, or other shaped holes, etc., as needed. Optionally, the oil passing hole 312 is formed as a kidney-shaped hole, so that the flow area of the frozen oil and the air flow can be effectively increased.

In order to improve the oil efficiency, in one embodiment, the peripheral surface of the shroud 32 is provided with fins and/or flow guide grooves. Optionally, a plurality of fins are arranged on the outer peripheral surface of the coaming 32 at intervals along the circumferential direction, and diversion trenches are formed between two adjacent fins, so that the frozen oil and the air flow on the outer peripheral surface of the coaming 32 can flow downwards along the diversion trenches. Alternatively, a plurality of flow guide grooves may be provided at intervals directly on the outer peripheral surface of the shroud 32 to guide the downward flow of the frozen oil and air flow.

As shown in fig. 5, in one embodiment, the rotor 22 is provided with through holes 224 extending in the axial direction, the through holes 224 penetrate through both ends of the rotor 22, and the central hole 301 communicates with the through holes 224.

In the present embodiment, the diameter of the center hole 301 is larger than the diameter of the rotary shaft 10, and the projection of the center hole 301 on the end face of the rotor 22 covers the area where the through-flow hole 224 is located, so that the through-flow hole 224 communicates with the center hole 301. In this way, the refrigerant oil and air flow in the windshield 30 can flow from the central hole 301 to the end face of the rotor 22 and then flow downwards along the through-flow hole 224 to cool the rotor 22, so that the efficiency of the motor 20 can be effectively improved, and the compressor efficiency can be improved.

The oil-containing refrigerant flowing to the bottom of the rotor 22 continues to flow and separate in the lower chamber of the compressor for further enhancing the separation effect. On the basis of the above embodiment, as shown in fig. 1 and 2, in an embodiment, an auxiliary balance block 40 is disposed at an end of the rotor 22 away from the main balance block 11, and the shafting oil component structure further includes an oil blocking cover 50 covering the periphery of the auxiliary balance block 40. When the rotor 22 rotates, the oil shield 50 rotates at a high speed, and when the oil-containing refrigerant moves to the area where the oil shield 50 is located, the oil gas is subjected to third rotation separation under the centrifugal action of the oil shield 50, and finally the refrigerant with extremely low oil content rises and is discharged from the exhaust port 602, and the frozen oil is deposited downwards into the oil pool at the bottom of the compressor. Through verification, the shafting oil content structure can reduce the oil discharge rate of the compressor by 23%, and has a remarkable effect.

As shown in fig. 1 and 2, the present utility model also proposes a compressor comprising a housing 60, a shafting oil structure and a compression assembly 70. Wherein the housing 60 is provided with an air suction port 601 and an air discharge port 602; the shafting oil component structure is arranged in the shell 60, the compression assembly 70 is arranged in the shell 60, and the compression assembly 70 is connected with the rotary shaft 10. The specific structure of the shafting oil component structure refers to the above embodiments, and because the compressor adopts all the technical schemes of all the embodiments, the shafting oil component structure at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein.

Including but not limited to scroll compressors, rotor compressors, or other types of compressors. For example, in the present embodiment, the compressor relates specifically to a scroll compressor. The compression assembly 70 is disposed at an upper end of the rotating shaft 10 of the shafting oil structure, and the compression assembly 70 includes an orbiting scroll connected to the rotating shaft 10 and a fixed scroll disposed opposite to the orbiting scroll. The lower end of the rotation shaft 10 is installed at a certain height position in the housing 60 through the support assembly 90, and the upper end of the rotation shaft 10 may be supported through a main frame fixed in the housing 60.

In this embodiment, when the compressor is in operation, the refrigerant entering from the system enters the compression chamber of the compression assembly 70 through the air suction port 601 for compression, the refrigerating oil in the oil sump at the bottom of the compressor rises through the rotary shaft 10, the oil inlet hole of the driven scroll enters the oil groove and the compression chamber of the fixed scroll, and finally is discharged with high-pressure gas. The high pressure gas is discharged upward and impinges upon the top inner surface of the housing 60 to form a single oil-gas separation at the top inner surface of the housing 60 and then flows downward through a notch provided in the main frame. When the air flow flows to the position below the main balance weight 11, the air flow is driven to rotate and separate by the wind shield 30 which is arranged on the rotor 22 and the wind shield 30 which rotates at high speed, so as to play a role in secondary separation. Due to the density difference of the freezing oil and the refrigerant, the heavy freezing oil is deposited and flows downwards under the action of tangential force and gravity. Meanwhile, as the wind shield 30 forms a negative pressure area at the outer side when rotating at high speed, the air flow can be further guided to flow downwards, so that the air flow which is not subjected to oil-gas separation is reduced to be directly discharged from the exhaust pipe 62 of the compressor, the oil discharge rate can be effectively reduced, and the exhaust oil content of the compressor is reduced.

In order to avoid that the bottom of the air flow agitates the frozen oil when flowing downwards, which results in too high an oil content in the exhaust air, in one embodiment, the bottom of the housing 60 is provided with an oil pool, and an oil baffle 80 is provided in the housing 60, and the oil baffle 80 is located below the motor 20 and above the oil pool. In this way, the exhaust air flow flowing out from the bottom of the motor 20 moves downwards for a certain distance and then is blocked by the oil baffle 80, and then flows upwards to the exhaust port 602 to be discharged, so that the air flow is prevented from further flowing downwards to disturb the frozen oil in the oil pool.

The utility model also provides a refrigerating device comprising the compressor. The specific structure of the compressor refers to the above embodiments, and because the refrigerating device adopts all the technical schemes of all the embodiments, the refrigerating device has at least all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (11)

1. A shafting oil structure for a compressor, the shafting oil structure comprising:

a rotating shaft provided with a main balance block;

the motor is positioned below the main balance weight and connected with the rotating shaft to drive the rotating shaft to rotate; and

the wind shield is arranged at one end of the motor, which is close to the main balance weight, and can rotate under the driving of the motor, and the wind shield is provided with a center hole for the rotating shaft to pass through.

2. The shafting oil component structure of claim 1, wherein the motor comprises a rotor sleeved on the periphery of the rotating shaft, the windshield comprises an end plate and a coaming arranged on the periphery of the end plate, the end plate is fixed on the end face of the rotor, the coaming extends from the end plate towards one side of the main balance block, and the center hole is formed in the end plate.

3. Shafting oil structure of claim 2, wherein the end plate is provided with fixing holes through which fasteners are placed, the fasteners fixing the end plate to the rotor.

4. The shafting oil component structure of claim 2, wherein the rotor includes a rotor core and a magnet provided in the rotor core, and the end plate is provided with an oil passage hole corresponding to the magnet.

5. Shafting oil structure according to claim 2, characterized in that the peripheral surface of the shroud is provided with fins and/or channels.

6. Shafting oil structure as claimed in claim 2, characterized in that the rotor is provided with through-flow holes extending in axial direction, the through-flow holes penetrating through both ends of the rotor, the central hole communicating with the through-flow holes.

7. The shafting oil component structure of claim 2, wherein the motor further comprises a stator sleeved outside the rotor, and an outer diameter dimension of the windshield is smaller than an inner diameter dimension of the stator;

and/or, the inner diameter size of the coaming is larger than the outer diameter size of the main balance block, and the top surface of the windshield is lower than the lower end surface of the main balance block.

8. The shafting oil component structure of any one of claims 2 to 7, wherein an auxiliary balance block is arranged at one end of the rotor away from the main balance block, and the shafting oil component structure further comprises an oil blocking cover which is covered on the periphery of the auxiliary balance block.

9. A compressor, comprising:

a shell provided with an air suction port and an air exhaust port;

a shafting oil structure provided in the housing, the shafting oil structure being as set forth in any one of claims 1 to 8; and

the compression assembly is arranged in the shell and is connected with the rotating shaft.

10. The compressor of claim 9, wherein an oil sump is provided at a bottom of the housing, and an oil baffle is provided in the housing, the oil baffle being positioned below the motor and above the oil sump.

11. A refrigeration device comprising a compressor as claimed in claim 9 or 10.

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