CN114183348B

CN114183348B - Quiet dish subassembly reaches scroll compressor including it

Info

Publication number: CN114183348B
Application number: CN202111555388.8A
Authority: CN
Inventors: 付昌云; 周丹; 吕丹丹; 兰晓男; 赵云月; 岳震
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-08-26
Anticipated expiration: 2041-12-17
Also published as: CN114183348A

Abstract

The invention provides a static disc assembly and a scroll compressor comprising the same. The quiet dish subassembly includes: the oil collecting device comprises a static disc main body, wherein an oil collecting groove is formed in the back end face of the static disc main body, and an oil return hole communicated with the oil collecting groove is formed in the static disc main body; the throttling oil storage component is arranged in the oil collecting tank; the flow guide plate comprises a cover plate and a flow guide part formed on the cover plate, the cover plate fixes the throttling oil storage assembly in the oil collecting tank, an oil discharge hole is formed in the cover plate and communicated with the oil collecting tank, a flow guide hole is formed in the flow guide part, and air flow in the exhaust hole flows out through the flow guide hole; the oil blocking cover covers the guide plate, an oil collecting cavity is formed between the oil blocking cover and the guide plate, and an outlet is formed in the top wall of the oil blocking cover. The static disc assembly of the scroll compressor can separate lubricating oil in an exhaust mixture, and the separated lubricating oil is introduced into the interior and the end face of the pump body through the throttling device, so that the lubrication of a sliding friction surface can be effectively ensured.

Description

Quiet dish subassembly reaches scroll compressor including it

Technical Field

The invention relates to the technical field of compressors, in particular to a static disc assembly and a scroll compressor comprising the same.

Background

The scroll compressor is one of positive displacement compressors, and realizes the volume change of a compression cavity through the meshing of a movable disc and a static disc, thereby realizing gas compression. There are a plurality of sliding pairs in the meshing process of driving disk and quiet dish, and specific contact surface is at the bottom of driving disk addendum and quiet dish tooth, at the bottom of quiet dish addendum and the driving disk tooth, driving disk base plate and quiet dish base plate. To reduce wear and to increase the reliability of the pump bodies (dynamic and static), it is generally necessary to introduce a large quantity of lubricating oil into the pump bodies. The excessive lubricating oil can lead to the oil output of the compressor to rise, when the oil return amount is lower than the oil output amount, the compressor is in a state of less oil, the pump body is easy to wear, and the energy efficiency of the compressor can be influenced due to the large oil output amount. Therefore, it is important to reduce the oil discharge rate of the scroll compressor while ensuring lubrication.

In order to reduce the oil discharge rate of the compressor, oil is serially connected to the exhaust side of the scroll compressor for oil separation during system use, and oil obtained by oil separation is introduced into the pump body along with air suction, so that lubricating oil entering the system is reduced, and the lubrication of the pump body is ensured. However, because the solubility and the temperature of the refrigerant and the lubricating oil are related, the solubility is low when the temperature is high, the solubility is high when the temperature is low, the system oil is in the external environment, the temperature of the system oil is lower than that of the inside of the compressor, and therefore the carrying capacity of the refrigerant is high when oil is returned, and the pump efficiency and the refrigerating capacity of the compressor are affected. The other mode of reducing the oil discharge rate is the change of the internal structure of the compressor, mainly aims to improve an oil path and an air path, realizes oil-gas separation through the change of the air path and the oil path, and reduces the carrying-over of lubricating oil by a refrigerant. However, this method is not effective in reducing the amount of oil discharged, and is not effective in changing the internal structure of the compressor.

Disclosure of Invention

In view of this, the present invention provides a fixed disk assembly and a scroll compressor including the same, which are at least used for solving the technical problem of high oil discharge rate in the prior art, and specifically:

in a first aspect, the present invention provides a static disc assembly comprising:

the oil collecting device comprises a static disc main body, wherein an oil collecting groove is formed on the back end face of the static disc main body around an exhaust hole of the static disc main body, and an oil return hole communicated with the oil collecting groove is formed in the static disc main body;

the throttling oil storage component is arranged in the oil collecting tank and has the functions of throttling and oil storage;

the flow guide plate comprises a cover plate and a flow guide part formed on the cover plate, the cover plate fixes the throttling oil storage assembly in the oil collecting tank, an oil discharge hole is formed in the cover plate, and the oil discharge hole is communicated with the oil collecting tank;

the flow guide part is formed in the middle of the cover plate and is opposite to the exhaust holes in the static disc main body, flow guide holes are formed in the flow guide part, and air flow in the exhaust holes flows out through the flow guide holes;

the oil baffle cover covers the guide plate, an oil collecting cavity is formed between the oil baffle cover and the guide plate, the guide holes exhaust air towards the side peripheral wall of the oil baffle cover, and an outlet is formed in the top wall of the oil baffle cover.

Further optionally, an oil guide groove is formed in the back end face of the static disc main body, and the oil guide groove is communicated with the oil collecting groove.

Further optionally, the oil guide groove is formed on a back end surface located inside and outside the oil collection groove.

Further optionally, an annular oil groove is formed in the lower end face of the static disc main body, and the annular oil groove is communicated with the oil collecting groove through the oil return hole.

Further optionally, a notch is further disposed on the lower end face of the stationary disc main body, and the notch enables the annular oil groove to communicate with the outer side of the stationary disc main body, so as to discharge oil in the annular oil groove.

Further optionally, the oil return holes are provided in plurality, and the oil return holes are respectively communicated with the inner cavity and the end face of the static disc main body.

Further optionally, the flow guide part is a cover-shaped structure formed by protruding in the middle of the cover plate, and a plurality of flow guide holes are distributed along the circumferential direction of the side circumferential wall of the cover-shaped structure;

the flow guide hole enables the air flow discharged by the exhaust hole to be discharged along the tangential direction of the exhaust hole.

Further optionally, the oil discharge groove is an arc-shaped groove, and a plurality of oil guide grooves are formed in the circumferential direction of the cover plate and communicated with the oil guide groove, and the oil discharge groove is communicated with the oil collecting groove through the oil guide groove.

Further optionally, the throttling oil storage assembly is of an annular structure and comprises a throttling part, and a capillary structure is formed in the throttling part.

Further optionally, the throttling member is composed of honeycomb ceramics.

Further optionally, the throttling oil storage assembly further comprises an inner sealing ring and an outer sealing ring;

the inner sealing ring is arranged on the inner side of the throttling component, and the outer sealing ring is arranged on the outer side of the throttling component.

In a second aspect, the present invention provides a scroll compressor including the above-described stationary plate assembly.

The static disc assembly of the scroll compressor can separate lubricating oil in an exhaust mixture, and the separated lubricating oil is introduced into the interior and the end face of the pump body through the throttling device, so that the lubrication of a sliding friction surface can be effectively ensured. The assembly comprises an oil collecting cavity and a throttling oil storage assembly and can provide lubrication during oil-deficient operation. Because the oil collecting cavity and the throttling oil storage assembly are arranged at the position of a static disc of the compressor, the temperature of the position can be kept at a higher level under the influence of exhaust gas, and the problem of high content of return oil refrigerant caused by insufficient temperature can be prevented.

Drawings

The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are merely some embodiments of the present disclosure, and other drawings may be derived from those drawings by those of ordinary skill in the art without inventive effort.

FIG. 1 shows an exploded view of a static disc assembly in accordance with an embodiment of the present invention;

FIG. 2 shows a back end view of a main body of a static plate according to an embodiment of the invention;

FIG. 3 shows a schematic view of a lower end face of a static disc body according to an embodiment of the invention;

FIG. 4 shows a schematic structural view of a baffle of an embodiment of the present invention;

FIG. 5 shows a schematic cross-sectional view of a stationary disk assembly of an embodiment of the present invention.

In the figure:

1. a stationary plate main body; 11. an oil sump; 12. an exhaust hole; 13. an oil guide groove; 14. an oil return hole; 15. An annular oil groove; 16. a notch; 21. a throttling member; 22. an inner seal ring; 23. an outer seal ring; 3. a baffle; 31. a cover plate; 311. an oil drain hole; 32. a flow guide part; 321. a flow guide hole; 4. An oil blocking cover; 41. and (7) an outlet.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and "a" and "an" generally include at least two, but do not exclude at least one, unless the context clearly dictates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.

The static disc component can separate the mixture discharged from the air outlet of the static disc of the compressor, and the separated lubricating oil is led to the sliding contact surface of the dynamic disc and the static disc through throttling. The honeycomb ceramic has throttling and filtering effects, and is composed of complex pore passages which are different in size and communicated in a zigzag manner, and the pore passages can be regarded as capillary tubes with variable sections and rough surfaces. The resistance of the refrigerant gas and the wet steam before the superheat degree of the exhaust gas is established when the wet steam passes through the honeycomb ceramic is large, and the wet steam is not easy to pass through the device, so that the gas cannot be mixed in the air suction and exhaust. The lubricating oil is deposited below the whole cavity, the liquid phase of the lubricating oil wets the solid phase in the porous medium to form capillary force, and the lubricating oil can flow through under the action of the capillary force and the pressure difference and enters the corresponding friction pair along a flow path. In addition, the assembly is provided with an oil storage and filtering structure, and can provide the oil quantity required by the lubrication of the pump body when the oil supply of the oil pool at the bottom of the compressor is insufficient. The static disc component can effectively guarantee oil lubrication of the pump body, and reliability and service life of the static disc component are improved. The invention is described in detail below with reference to specific examples:

as shown in fig. 1 and 5, the present publication provides a stationary disc assembly including:

an oil collecting groove 11 is formed on the back end face of the static disc main body 1 around an exhaust hole 12 of the static disc main body 1, and an oil return hole 14 communicated with the oil collecting groove 11 is formed in the static disc main body 1;

the throttling oil storage component is arranged in the oil collecting groove 11, and lubricating oil can flow through the throttling oil storage component and then flow into the oil return hole 14;

the guide plate 3 comprises a cover plate 31 and a guide part 32 formed on the cover plate 31, the cover plate 31 fixes the throttling oil storage assembly in the oil collecting tank 11, an oil discharge hole 311 is formed on the cover plate 31, and the oil discharge hole 311 is communicated with the oil collecting tank 11;

the flow guide part 32 is formed in the middle of the cover plate 31 and is opposite to the exhaust hole 12 on the static disc main body 1, a flow guide hole 321 is formed on the flow guide part 32, and the airflow of the exhaust hole 12 flows out through the flow guide hole 321;

the oil blocking cover 4 covers the guide plate 3, an oil collecting cavity is formed between the oil blocking cover 4 and the guide plate 3, the guide hole 321 exhausts air towards the side peripheral wall of the oil blocking cover 4, and an outlet 41 is formed on the top wall of the oil blocking cover 4.

As shown in fig. 2, preferably, an oil guide groove 13 is formed on the back end surface of the stationary disc main body 1, and the oil guide groove 13 communicates with the oil sump 11. In the present embodiment, the oil guide groove 13 is formed on the back end surface located inside and outside the oil sump 11, and further, the oil guide groove 13 extends in the radial direction of the oil sump 11 and is distributed in plural in the circumferential direction thereof.

The oil return holes 14 are provided in a plurality, and the oil return holes 14 are respectively communicated with the inner cavity and the end face of the static disc main body 1. Preferably, oil return holes 14 are formed in the central cavity, the middle cavity, the air suction cavity and the end surface of the static disc main body 1, namely, the parts are communicated with the oil collecting groove 11, and lubricating oil in the oil collecting groove 11 can flow to all parts through the oil return holes 14 to ensure that the lubricating oil is sufficient.

As shown in fig. 3, an annular oil groove 15 is further formed on the lower end surface of the static disc main body 1, the annular oil groove 15 communicates with the oil collecting groove 11 through one or more oil return holes 14, and a notch 16 is further formed on the lower end surface, and the notch 16 communicates the annular oil groove 15 with the outside of the static disc main body 1. And the annular oil groove 15 is used for enlarging the end face lubrication area, redundant lubricating oil flows out along the notch 16 of the oil guide groove 13, and the lubricating oil enters the annular oil groove 15 through the oil return hole 14 and is discharged from the notch 16 after participating in end face lubrication.

As shown in fig. 4, preferably, the cover plate 31 of the deflector 3 is a ring-shaped plate-shaped structure, the outer edge shape of which is the same as the outer edge shape of the back end face of the static disc main body 1, the inner edge of the cover plate 31 is circular, and the diameter of the inner edge of the cover plate 31 is larger than the diameter of the exhaust hole 12 of the static disc main body 1 and smaller than the inner side diameter of the oil collecting tank 11, i.e. the cover plate 31 can cover the oil collecting tank 11 to effectively fix the throttling oil storage assembly and avoid affecting the exhaust of the exhaust hole 12.

The oil discharge groove is an arc-shaped groove, and a plurality of oil discharge grooves are arranged along the circumferential direction of the cover plate 31, communicated with the oil guide groove 13 and communicated with the oil collecting groove 11 through the oil guide groove 13.

Preferably, the guiding portion 32 is a cover-like structure formed by protruding in the middle of the cover plate 31, the guiding holes 321 are distributed along the circumferential direction of the side peripheral wall of the cover-like structure, the guiding holes 321 enable the air flow discharged from the air discharge hole 12 to be discharged along the tangential direction of the air discharge hole 12, so as to achieve the centrifugal oil separation effect, and in addition, the air discharged from the side direction impacts the oil deflector cover 4 at a certain angle, so that the pressure loss can be reduced.

As shown in fig. 1, the oil deflector cover 4 has a cover-like structure including a side peripheral wall and a top wall, and the top wall has an outlet 41 formed therein for exhausting the pump body. The edge of the side peripheral wall is provided with a connecting part, the oil baffle cover 4 and the guide plate 3 are fixedly connected to the static disc main body 1 together, during assembly, the throttling oil storage assembly is firstly placed into the oil collecting tank 11, then the guide plate 3 and the oil baffle cover 4 are sequentially placed according to the positions of threaded holes, and finally the oil baffle cover and the oil baffle cover are fixed through bolts.

The throttling oil storage assembly is of an annular structure and comprises a throttling part 21, a plurality of flow channels are formed in the throttling part 21, the flow channels penetrate through the throttling part 21 in the axial direction, and the flow channels are preferably of a capillary structure. Preferably, the throttling part 21 is made of honeycomb ceramics, and is composed of complex pore canals which are different in size and communicated with each other in a zigzag manner, the pore canals can be regarded as capillary tubes with changed sections and rough surfaces, the capillary tubes play a similar throttling role, the internal loose porous structure can also store lubricating oil from a high-pressure oil collecting cavity, and the throttling part 21 is arranged in the oil collecting tank 11 and is fixed by the flow guide plate 3. The inner side and the outer side of the throttling part 21 are provided with rubber sealing rings, lubricating oil can be prevented from leaking from a gap between honeycomb ceramics and a static disc, specifically, the throttling oil storage assembly further comprises an inner sealing ring 22 and an outer sealing ring 23, the inner sealing ring 22 is arranged on the inner side of the throttling part 21, and the outer sealing ring 23 is arranged on the outer side of the throttling part 21.

The process of the exhaust and oil return of the static disc assembly is as follows: high-pressure gas in the static disc main body 1 is upwards discharged from the exhaust hole 12, the gas is discharged from the flow guide hole 321 on the side surface after impacting the flow guide plate 3, part of oil drops are condensed and flow down along the inner wall of the flow guide part 32 in the impacting process, enter the oil collecting tank 11 along the oil return groove, and enter the compression cavity and the lower end surface of the static disc along the oil return hole 14 after being throttled and filtered by the throttling part 21. After being discharged from the guide holes 321 of the guide plate 3, the gas impacts the side peripheral wall of the oil baffle cover 4 along a certain angle, and after impact, oil drops are condensed again and flow down along the inner wall of the oil baffle cover 4. The flow blocking cover and the oil guide plate form a high-pressure oil collecting cavity (oil pool) for collecting lubricating oil flowing down from the side wall of the oil blocking cover 4, and the lubricating oil in the oil pool enters the throttling part 21 along the oil blocking cover 4 and the oil guide groove 13 and then returns to the lower end face of the compression cavity and the static disc through throttling filtration. Because the pressure of the exhaust port of the compressor is greater than that of the compression cavity and the end face of the static disc, lubricating oil can enter the interior and the end face of the pump body along the oil way.

The invention also provides a scroll compressor which comprises the static disc assembly.

The static disc assembly of the scroll compressor can separate lubricating oil in an exhaust mixture, and the separated lubricating oil is introduced into the interior and the end face of the pump body through the throttling device, so that the lubrication of a sliding friction surface can be effectively ensured. The assembly comprises an oil collecting cavity and a throttling oil storage assembly and can provide lubrication during oil-deficient operation. Because the oil collecting cavity and the throttling oil storage assembly are arranged at the position of a static disc of the compressor, the temperature of the position can be kept at a higher level under the influence of exhaust gas, and the problem of high content of return oil refrigerant caused by insufficient temperature can be prevented. The oil return principle of the structure is pressure difference oil supply, and the oil return operation can be completed after the suction and exhaust pressure difference is established, so that the structure is stable and reliable. The pump body of the static disc assembly can be guaranteed to be lubricated, and the problem of reliability caused by insufficient lubrication is solved.

Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the present disclosure is not limited to the precise arrangements, instrumentalities, or instrumentalities described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A static disc assembly, comprising:

the flow guide plate comprises a cover plate and a flow guide part formed on the cover plate, the cover plate fixes the throttling oil storage assembly in the oil collecting tank, an oil discharge hole is formed in the cover plate and communicated with the oil collecting tank,

2. The static disc assembly as claimed in claim 1, wherein the static disc main body is formed with an oil guiding groove on a back end surface thereof, the oil guiding groove communicating with the oil collecting groove.

3. The static disc assembly as claimed in claim 2, wherein said oil-guiding groove is formed on a back end surface located inside and outside said oil-collecting groove.

4. The stationary disc assembly as set forth in claim 2, wherein an annular oil groove is formed on a lower end surface of said stationary disc main body, said annular oil groove communicating with said oil sump through said oil return hole.

5. The static disc assembly as claimed in claim 4, wherein a gap is further provided on the lower end surface of the static disc main body, the gap communicating the annular oil groove with the outside of the static disc main body for discharging oil in the annular oil groove.

6. The static disc assembly according to claim 2, wherein a plurality of oil return holes are provided, and the plurality of oil return holes are respectively communicated with the inner cavity and the end face of the static disc main body.

7. The static disc assembly as claimed in claim 2, wherein the flow guiding part is a cover-like structure formed by protruding in the middle of the cover plate, the flow guiding holes are distributed along the circumferential direction of the side wall of the cover-like structure,

8. The static disc assembly as claimed in claim 2, wherein said oil discharge hole is an arc-shaped groove, and a plurality of said oil discharge holes are provided along the circumferential direction of said cover plate, said oil discharge hole communicating with said oil guide groove, and said oil discharge hole communicating with said oil collection groove through said oil guide groove.

9. The static disc assembly as claimed in claim 1, wherein the throttling oil storage assembly is an annular structure comprising a throttling member having a capillary structure formed therein.

10. The stationary disc assembly as set forth in claim 9, wherein said choke member is constructed of a honeycomb ceramic.

11. The static disc assembly of claim 10, wherein the throttling oil storage assembly further comprises an inner sealing ring and an outer sealing ring,

12. A scroll compressor comprising the stationary disc assembly of any one of claims 1-11.