CN115788828A - Compressor oil circulation structure - Google Patents
Compressor oil circulation structure Download PDFInfo
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- CN115788828A CN115788828A CN202211625916.7A CN202211625916A CN115788828A CN 115788828 A CN115788828 A CN 115788828A CN 202211625916 A CN202211625916 A CN 202211625916A CN 115788828 A CN115788828 A CN 115788828A
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Abstract
The invention discloses a compressor oil circulation structure, wherein a boss is arranged in the middle of a shell, and divides a space between the shell and a movable disk into a crankshaft transmission cavity close to the movable disk and a low-pressure oil storage cavity far away from the movable disk; a high-pressure oil storage cavity is formed between the static disc and the end cover and is communicated with the low-pressure oil storage cavity through an oil return hole; the boss provides a wear-resistant gasket supporting surface, the wear-resistant gasket is arranged on the wear-resistant gasket supporting surface, and the movable disc abuts against the wear-resistant gasket; a movable disc groove is formed in the movable disc, a wear-resistant pad hole is formed in the wear-resistant pad, an oil circulation channel is formed in the boss of the shell, and the oil circulation channel is right opposite to the wear-resistant pad hole; in the periodic revolution motion, the groove of the movable disc is periodically communicated with the wear-resistant gasket hole or the crankshaft transmission cavity so as to pump the oil in the low-pressure oil storage cavity into the crankshaft transmission cavity.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to a compressor oil circulation structure.
Background
The refrigeration oil in the high-pressure exhaust cavity returns to the low-pressure cavity after throttling, and if no set of oil circulation system is provided or the oil circulation efficiency is low, the return oil is gathered in the oil pool, so that the effect of the refrigeration oil is greatly reduced.
Running parts (such as a bearing, a pump body and the like) of the compressor need to be lubricated and cooled by the refrigerating machine oil, and if an internal oil circulation loop of the compressor is not provided or the internal oil circulation loop is not designed well, most of the refrigerating machine oil enters a pipeline along with a refrigerant. Generally, the heat exchange efficiency of the evaporator and the condenser is not good due to the excessively high external oil circulation rate, and the compressor is damaged due to oil shortage caused by poor oil return. Therefore, increasing the oil circulation rate inside the compressor is an important way to ensure reliable operation of the compressor.
CN111648962A discloses an oil circulation structure of a horizontal scroll compressor, the interior of the compressor is divided into a high pressure chamber and a low pressure chamber by a partition plate 4. An oil-gas separation device 6 is arranged in the high-pressure cavity, and the oil-gas separation device separates out the lubricating oil in the exhaust gas and accumulates the lubricating oil in a high-pressure cavity oil pool 13. The oil return pipe 7 is communicated with a lubricating oil passage 311 in the rotary shaft 31, and lubricates various moving parts in the compressor through oil holes formed in the rotary shaft. Lubricating oil lubricates all parts and then is collected at the bottom of the low-pressure cavity shell to form a low-pressure cavity oil pool 14. Meanwhile, the lubricating oil and the sucked air flow are mixed and then are brought into the scroll compression cavity to lubricate the scroll plate, and then are discharged through exhaust, so that the circulation of the lubricating oil in the shell of the compressor is realized.
Although the CN111648962A gives consideration to the lubrication of three bearings, a long copper pipe needs to be added, the cost is high, the long copper pipe is difficult to fix, and the first-order mode of the long copper pipe is low, and the long copper pipe is easy to generate resonance to break or displace the copper pipe to cause failure.
CN104421160A discloses a lubricating oil circulation system of a scroll compressor, wherein lubricating oil separated from an exhaust high-pressure cavity 4 of the scroll compressor enters a cavity 2 positioned at the back of a movable scroll of the scroll compressor, an oil inlet hole 1 is formed in the movable scroll of the scroll compressor, and then the lubricating oil enters the scroll cavity from the oil inlet hole of the movable scroll; the distance from the oil inlet hole of the movable scroll plate to the center of the spiral line tooth of the fixed scroll plate is closer to the exhaust hole 3 on the fixed scroll plate of the scroll compressor, and the pressure on the back of the movable scroll plate is higher than the pressure on the inner side of the oil inlet hole. After the technical scheme is adopted, cavity pressure is formed in the cavity at the back of the movable vortex plate, and the movable vortex plate generates proportional pressure to the fixed vortex plate, so that the axial flexible sealing of the end face of the vortex is realized.
CN104421160A has the following problems although it has simple structure: after oil returned by the high-pressure cavity enters the crankshaft cavity, the oil cannot be cooled and directly enters the vortex compression cavity, and the exhaust temperature is increased, so that the durability of the compressor is not facilitated; high pressure is formed in a crankshaft cavity through high-pressure return oil to realize axial flexible sealing of the movable scroll, a good effect can be achieved for a certain specific working condition, and when the exhaust pressure is too high, the sealing force is possibly too large to aggravate abrasion.
Disclosure of Invention
In view of the above, the present invention provides a simple and efficient oil circulation method, and an object of the present invention is to provide a compressor oil circulation structure.
In order to achieve the purpose, the invention adopts the technical scheme that:
a compressor oil circulation structure comprises a shell, a crankshaft arranged in the shell, a static disc connected with the shell, a movable disc arranged in the shell and matched with the static disc, and an end cover connected with the static disc; the crankshaft drives the movable disc to do periodic revolution motion relative to the static disc; wherein the content of the first and second substances,
the middle part of the shell is provided with a boss which divides a space between the shell and the movable disc into a crankshaft transmission cavity close to the movable disc and a low-pressure oil storage cavity far away from the movable disc;
a high-pressure oil storage cavity is formed between the static disc and the end cover and is communicated with the low-pressure oil storage cavity through an oil return hole;
the boss provides a wear-resistant gasket supporting surface, the wear-resistant gasket supporting surface is provided with a wear-resistant gasket, and the movable disc abuts against the wear-resistant gasket;
the movable disc is provided with a movable disc groove, the wear-resistant gasket is provided with a wear-resistant gasket hole, the boss of the shell is provided with an oil circulation channel, and the oil circulation channel is opposite to the wear-resistant gasket hole;
in the periodic revolution motion, the movable disc groove is periodically communicated with the wear-resistant gasket hole or the crankshaft transmission cavity so as to pump oil in the low-pressure oil storage cavity into the crankshaft transmission cavity.
The above compressor oil circulating structure, wherein the wear pad hole has an inner edge near the center of the crankshaft and an outer edge away from the center of the crankshaft;
the cam plate groove has an inner edge near the center of the crankshaft and an outer edge away from the center of the crankshaft;
the inner edge of the wear pad hole (701) satisfies:
R trough -r＜R Inner part ＜R Trough +r；
Wherein R is Trough Is the radius of the outer edge of the movable disc groove; r is the rotating radius of the movable disc; r Inner part Is the radius of the inner edge of the wear pad hole.
In the above compressor oil circulation structure, the moving plate groove is periodically communicated with or closed to the wear pad hole in the periodic revolution motion.
In the above compressor oil circulating structure, in the periodic revolution motion, when the movable disc runs to the top dead center position, the movable disc groove and the wear-resistant gasket hole are closed.
In the above compressor oil circulation structure, a middle portion of the crankshaft is rotatably connected to the boss of the housing, and a main bearing is disposed between the middle portion of the crankshaft and the boss of the housing;
the end part of the crankshaft is rotatably connected with the movable disc, and a movable disc bearing is arranged between the end part of the crankshaft and the movable disc.
The compressor oil circulation structure includes: the movable disc, the wear-resistant gasket, the boss of the shell and the crankshaft surround to form the crankshaft transmission cavity.
In the above compressor oil circulation structure, the oil return hole is provided with a screw pin.
In the above oil circulation structure of the compressor, a balance block is disposed in the transmission cavity of the crankshaft.
In the above compressor oil circulation structure, the number of the oil circulation passages is one or more.
The compressor oil circulation structure includes: the static disc with form between the movable disc high pressure chamber with high-pressure oil storage chamber, the high pressure chamber with be equipped with oil-gas separation device between the high pressure oil storage chamber.
Due to the adoption of the technology, compared with the prior art, the invention has the following positive effects:
(1) The invention provides a simple and efficient oil circulation mode: the return oil enters the oil pool and then is mixed with cold oil on the motor side, an oil circulation hole is formed in the position, slightly higher than the oil return hole, the return oil is brought into the crankshaft transmission cavity through the groove in the movable disc to be atomized, the atomized refrigerant oil lubricates a movable disc bearing and a main bearing on one hand, and enters the pump body through the air suction flow passage to participate in main circulation on the other hand.
(2) The return oil of the invention enters the oil pool instead of directly entering the crankshaft transmission cavity, thus reducing the temperature of the circulating oil, being beneficial to reducing the exhaust temperature and prolonging the service life of the compressor.
(3) According to the invention, the oil is actively pumped into the crankshaft transmission cavity through the simple opening and the movable disc groove, and additional structures and parts are not needed.
(4) The invention can increase the lubrication between the movable disc and the wear-resisting gasket through the capillary action between the movable disc and the wear-resisting gasket.
(5) The invention not only satisfies the lubrication and cooling of the main bearings (the movable disc bearing and the main bearing), but also can enter the compression cavity for lubrication after being fully atomized.
Drawings
FIG. 1 is a schematic side sectional view of a compressor oil circulation configuration of the present invention;
FIG. 2 is a schematic cross-sectional view of the compressor oil circulation configuration of the present invention;
FIG. 3 is a schematic view of the moving plate and wear pad of the compressor oil circulation structure of the present invention;
FIG. 4 is a schematic view of the moving plate and wear pad of the compressor oil circulation structure of the present invention;
FIG. 5 is a schematic view of the bottom dead center position of the compressor oil circulation configuration of the present invention;
FIG. 6 is a schematic view of the bottom dead center position of the compressor oil circulation configuration of the present invention;
FIG. 7 is a schematic top dead center position of the compressor oil circulation configuration of the present invention;
FIG. 8 is a schematic top dead center position of the compressor oil circulation configuration of the present invention;
FIG. 9 is a schematic view of the engagement of the moving plate and wear pad of the compressor oil circulation structure of the present invention;
in the drawings: 1. a screw pin; 2. an oil return hole; 301. an oil circulation passage; 302. an oil circulation passage; 4. an end cap; 5. a stationary disc; 6. a movable disc; 7. a wear resistant pad; 8. a housing; 801. a siphon tank; 802. a siphon tank; 803. a flow channel; 9. a movable disc bearing; 10. a main bearing; 11. a counterbalance; 12. a stationary disc exhaust port; 13. a crankshaft; A. a high pressure chamber; B. a high pressure oil storage chamber; C. a low pressure oil storage chamber; D. a crankshaft drive cavity; x, inner edge; y, outside edge.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "inside", "outside", "front", "back", "lateral", "vertical", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of description of the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, and thus, the present invention is not to be construed as being limited thereto.
Referring to fig. 1 to 9, a compressor oil circulation structure of a preferred embodiment is shown, which includes a housing 8, a crankshaft 13 disposed in the housing 8, a stationary disc 5 connected to the housing 8, a movable disc 6 disposed in the housing 8 and matching with the stationary disc 5, and an end cover 4 connected to the stationary disc 5; the crankshaft 13 drives the movable plate 6 to perform periodic revolution motion relative to the stationary plate 5.
Further, as a preferred embodiment, the housing 8 has a boss in the middle thereof, and the boss divides the space between the housing 8 and the movable disk 6 into a crankshaft transmission chamber D close to the movable disk 6 and a low-pressure oil storage chamber C far from the movable disk 6.
Further, as a preferred embodiment, a high-pressure oil storage chamber B is formed between the static disc 5 and the end cover 4, and the high-pressure oil storage chamber B is communicated with the low-pressure oil storage chamber C through the oil return hole 2. The high-temperature refrigeration oil returned by the high-pressure oil storage cavity B firstly enters the low-pressure oil storage cavity (C) at the motor side and is mixed with cold oil components in the low-pressure oil storage cavity, so that the temperature of the circulating oil entering the compression cavity can be effectively reduced, the exhaust is reduced, and the service life of the compressor is prolonged.
Further, as a preferred embodiment, the boss provides a wear-resistant pad supporting surface, a wear-resistant pad 7 is arranged on the wear-resistant pad supporting surface, and the movable disc 6 abuts against the wear-resistant pad 7.
Further, as a preferred embodiment, a movable disc groove 601 is formed on the movable disc 6, a wear pad hole 701 is formed on the wear pad 7, oil circulation passages 301 and 302 are formed on a boss of the housing 8, and the oil circulation passages 301 and 302 are opposite to the wear pad hole 701.
Further, as a preferred embodiment, in the periodic revolution motion, the movable plate groove 601 periodically communicates with the wear pad hole 701 or with the crank drive chamber D to pump the oil in the low pressure oil storage chamber C into the crank drive chamber D.
The liquid oil in the movable disc groove 601 can be fully paved on the wear-resistant gasket 7 through the capillary channel between the movable disc 6 and the wear-resistant gasket 7, so that the friction coefficient between the movable disc 6 and the wear-resistant gasket 7 is reduced, and the performance of the compressor is improved.
Further, as a preferred embodiment, wear pad hole 701 has an inner edge x that is near the center of crankshaft 13 and an outer edge y that is away from the center of crankshaft 13.
Further, as a preferred embodiment, the cam plate groove 601 has an inner edge near the center of the crankshaft 13 and an outer edge away from the center of the crankshaft 13.
Further, as a preferred embodiment, the inner edge x of the wear pad hole 701 satisfies:
R trough -r＜R Inner part ＜R Trough +r；
Wherein R is Trough The radius of the outer edge of the cam plate groove 601; r is the rotation radius of the movable disc 6; r is Inner part Is the radius of the inner edge x of the wear pad hole 701.
Preferably, as a preferred embodiment, a movable disc groove 601 is formed on the back surface of the movable disc 6 close to the lower part, a wear pad hole 701 is formed on the wear pad 7 close to the lower part, the wear pad hole 701 is preferably a long hole, more preferably a kidney-shaped hole, and the long hole can be a rectangular hole with round corners in other embodiments.
Preferably, as a preferred embodiment, the lower portion of the supporting surface of the wear-resistant pad is provided with one or more holes communicating with the wear-resistant pad 7.
The main characteristic of the structure is that the moving disk 6 runs for a circle, which ensures that the long holes on the wear-resistant gaskets 7 are communicated with the moving disk grooves 601 in a large area, and ensures that the wear-resistant gasket holes 701 are not communicated with the moving disk grooves 601 completely when the moving disk 6 runs to the upper stop position. Thus, for wear pad hole 701, the inner side R has the characteristics described by the above formula.
More specifically, as shown in FIG. 5 and FIG. 6, R is Inner max ＝R Lower part ＝R Trough +r.
More specifically, as shown in FIG. 7 and FIG. 8, R For internal min ＝R Upper part of ＝R Trough -r。
Wherein R is Lower part The distance R from the bottom dead center position to the outer edge of the cam groove 601 On the upper part Is the distance from the top dead center position to the outer edge of the cam plate groove 601.
Further, as a preferred embodiment, in the periodic revolution motion, the movable disc groove 601 is periodically communicated with or closed to the wear pad hole 701.
Further, as a preferred embodiment, in the periodic revolution motion, when the movable disc 6 runs to the top dead center position, the movable disc groove 601 and the wear pad hole 701 are closed.
Further, as a preferred embodiment, a middle portion of the crankshaft 13 is rotatably connected to a boss of the housing 8, and a main bearing 10 is provided between the middle portion of the crankshaft 13 and the boss of the housing 8.
Further, as a preferred embodiment, the end of the crankshaft 13 is rotatably connected to the movable plate 6, and a movable plate bearing 9 is provided between the end of the crankshaft 13 and the movable plate 6.
Further, as a preferred embodiment, the method comprises the following steps: the movable disc 6, the wear-resistant gasket 7, the boss of the shell 8 and the crankshaft 13 surround to form a crankshaft transmission cavity D.
Further, as a preferred embodiment, a spiral pin 1 is arranged at the oil return hole 2.
Further, as a preferred embodiment, a balance weight 11 is disposed in the crankshaft transmission cavity D.
Further, as a preferred embodiment, one or more oil circulation passages 301,302 are provided.
Further, as a preferred embodiment, the method comprises the following steps: a high-pressure cavity A and a high-pressure oil storage cavity B are formed between the static disc 5 and the dynamic disc 6, and an oil-gas separation device is arranged between the high-pressure cavity A and the high-pressure oil storage cavity B.
Specifically, in this embodiment, the compressed working medium is discharged from the stationary disc exhaust port 12 after being compressed, and enters the high-pressure chamber a formed by the stationary disc 5 and the end cover 4, and the compressed working medium at this time is a mixture of gaseous refrigerant and oil mist.
Further, after the oil-gas mixture is separated by the oil separating device, part of oil mist is collected into liquid oil and flows to the high-pressure oil storage cavity B, and the liquid oil is throttled by the spiral pin 1 and then enters the low-pressure oil storage cavity C through the oil return hole 2.
Further, the return oil enters the groove 601 of the movable disk 6 after passing through the oil circulation channel 301 and the oil circulation channel 302 above the oil return hole 2, and the groove 601 of the movable disk 6 and the wear-resistant gasket 7 continuously form a communication-closed circulation process in the rotation process, so that the oil in the low-pressure oil storage cavity C is pumped into a crankshaft transmission cavity D consisting of the movable disk 6, the wear-resistant gasket 7, the shell 8, the main bearing 10 and the crankshaft 13.
Further, the liquid oil is scattered by the balance weight 11 in the crank chamber D to form an oil mist, which lubricates the main bearing 10 and the disc bearing 9.
Further, the flow channel 803 on the casing 8 forms a local low pressure due to the passing of high-speed airflow, and is communicated with the crankshaft transmission cavity D through the siphon groove 801 and the siphon groove 802 formed on the casing 8, so that the oil mist in the crankshaft transmission cavity D is sucked into the flow channel, enters the scroll suction inlet along with the refrigerant, is compressed by the scroll and then is discharged from the stationary disc exhaust port 12, and a primary oil circulation is completed.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. A compressor oil circulation structure comprises a shell (8), a crankshaft (13) arranged in the shell (8), a static disc (5) connected with the shell (8), a movable disc (6) arranged in the shell (8) and matched with the static disc (5), and an end cover (4) connected with the static disc (5); wherein the crankshaft (13) drives the movable disc (6) to do periodic revolution motion relative to the static disc (5);
it is characterized in that the preparation method is characterized in that,
the middle part of the shell (8) is provided with a boss which divides a space between the shell (8) and the movable disc (6) into a crankshaft transmission cavity (D) close to the movable disc (6) and a low-pressure oil storage cavity (C) far away from the movable disc (6);
a high-pressure oil storage cavity (B) is formed between the static disc (5) and the end cover (4), and the high-pressure oil storage cavity (B) is communicated with the low-pressure oil storage cavity (C) through an oil return hole (2);
the boss provides a wear-resistant gasket supporting surface, a wear-resistant gasket (7) is arranged on the wear-resistant gasket supporting surface, and the movable disc (6) is abutted against the wear-resistant gasket (7);
wherein a movable disc groove (601) is formed in the movable disc (6), a wear-resistant gasket hole (701) is formed in the wear-resistant gasket (7), an oil circulation channel (301, 302) is formed in the boss of the shell (8), and the oil circulation channel (301, 302) is right opposite to the wear-resistant gasket hole (701);
in the periodic revolution motion, the movable disc groove (601) is periodically communicated with the wear-resistant gasket hole (701) or the crankshaft transmission cavity (D) so as to pump oil in the low-pressure oil storage cavity (C) into the crankshaft transmission cavity (D).
2. The compressor oil circulation structure of claim 1, wherein the wear pad hole (701) has an inner edge (x) near the center of the crankshaft (13) and an outer edge (y) away from the center of the crankshaft (13);
the cam plate groove (601) has an inner edge near the center of the crankshaft (13) and an outer edge away from the center of the crankshaft (13);
the inner edge (x) of the wear pad hole (701) satisfies:
R trough -r＜R Inner part ＜R Trough +r；
Wherein R is Trough Is the radius of the outer edge of the movable disc groove (601); r is the rotating radius of the movable disc (6); r is Inner part Is the radius of the inner edge (x) of the wear pad hole (701).
3. The compressor oil circulation structure as claimed in claim 1, wherein the moving disc groove (601) is periodically communicated with or closed from the wear pad hole (701) in the periodic revolution motion.
4. The compressor oil circulation structure according to claim 3, wherein the moving plate groove (601) is closed with the wear pad hole (701) when the moving plate (6) is operated to a top dead center position in the periodic revolution motion.
5. A compressor oil circulation structure according to claim 1, wherein a middle portion of the crankshaft (13) is rotatably connected to the boss of the casing (8), and a main bearing (10) is provided between the middle portion of the crankshaft (13) and the boss of the casing (8);
the tip of bent axle (13) with rotationally connect between driving disk (6), the tip of bent axle (13) with be equipped with driving disk bearing (9) between driving disk (6).
6. The compressor oil circulation structure according to claim 5, comprising: the movable disc (6), the wear-resistant gasket (7), the boss of the shell (8) and the crankshaft (13) surround to form the crankshaft transmission cavity (D).
7. Compressor oil circulation structure in accordance with claim 1, characterized in that a screw pin (1) is provided at the oil return hole (2).
8. Compressor oil circulation structure, in accordance with claim 1, characterized in that a counterweight (11) is provided in the crankshaft drive chamber (D).
9. The compressor oil circulation structure according to claim 1, wherein the oil circulation passage(s) (301, 302) is one or more.
10. The compressor oil circulation structure according to claim 1, comprising: the oil-gas separator is characterized in that the static disc (5) and the moving disc (6) form a high-pressure cavity (A) and a high-pressure oil storage cavity (B), and an oil-gas separation device is arranged between the high-pressure cavity (A) and the high-pressure oil storage cavity (B).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211625916.7A CN115788828A (en) | 2022-12-16 | 2022-12-16 | Compressor oil circulation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211625916.7A CN115788828A (en) | 2022-12-16 | 2022-12-16 | Compressor oil circulation structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115788828A true CN115788828A (en) | 2023-03-14 |
Family
ID=85426013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211625916.7A Pending CN115788828A (en) | 2022-12-16 | 2022-12-16 | Compressor oil circulation structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115788828A (en) |
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2022
- 2022-12-16 CN CN202211625916.7A patent/CN115788828A/en active Pending
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