CN111734636A

CN111734636A - Sealing structure and sealing method for refrigeration rotor type compressor

Info

Publication number: CN111734636A
Application number: CN202010548739.1A
Authority: CN
Inventors: 杨百昌; 王新南; 陈刚; 戴竟雄; 熊勃; 孟碧光; 李华军
Original assignee: Huangshi Dongbei Electrical Appliance Co Ltd
Current assignee: Huangshi Donper Compressor Co Ltd
Priority date: 2020-06-16
Filing date: 2020-06-16
Publication date: 2020-10-02

Abstract

The invention discloses a sealing structure and a sealing method for a refrigerating rotor type compressor.A rotor sealing end face and/or a sliding block sealing end face are/is provided with an oil groove, and the oil groove contains a small amount of oil; the sealing structure can form a small air cavity in a sealing strip between an upper cylinder cover of a rotor compressor and a high-low pressure cavity of a rotor or (and) a slide block end surface and a sealing strip between a lower cylinder cover of the rotor compressor and the high-low pressure cavity of the rotor or (and) the slide block end surface, the small air cavity plays a role in buffering and sealing in the process that high-pressure gas flows to the low-pressure cavity, and can contain a small amount of oil to supplement an oil film of the high-low pressure sealing surface back and forth, and the oil film plays a role in sealing in a gap of the sealing surface; even under the blowing-off action of the high-pressure end gas, the oil film can move back and forth on two surfaces of the oil groove, and a layer of oil film is formed on the sealing end surface all the time, so that the leakage of the high-pressure end gas to the low-pressure end is reduced, the gas transmission quantity of the compressor is ensured, and the power consumption of the compressor is reduced.

Description

Sealing structure and sealing method for refrigeration rotor type compressor

Technical Field

The invention relates to the technical field of rotor compressors, in particular to a sealing structure and a sealing method for a refrigerating rotor compressor.

Background

In the refrigeration industry, a rotor compressor is a commonly used structure widely applied, and has the advantages of high performance, simple structure and low cost. Especially has higher cost performance in the air conditioning industry. The common structure of the rotor type compressor comprises a rolling rotor type and a swinging rotor type; as shown in fig. 1 and 2 of the specification, the swing type rotor compressor is provided, one side of a rotor is an air inlet (low-pressure end), the other end of the rotor is provided with an air outlet (high-pressure end), a micro gap is formed between the end surface of the rotor and an end cover, and an oil film is arranged in the gap to form an oil film sealing surface.

The existing rotor sealing structure has a small gap between the end face of the rotor and the end cover, and is influenced by the high-low pressure difference of gas, a small amount of gas at the high-pressure end leaks to the low-pressure end, and the high-pressure gas easily blows off an oil film, so that the leakage rate is further increased, the gas transmission rate of a compressor is reduced, and the power consumption is increased.

There are also forms in which a sealing ring or seal is provided to form the seal. For example, in the chinese utility model patent (publication No. CN2528972), in 2003, a cylinder assembly with a sealing piston was disclosed, in which a sealing groove is provided on one end surface of an integrated piston, and a sealing ring is disposed in the sealing groove; the sealing effect between integrated piston and upper and lower cylinder cap has been improved in setting up of sealing washer, but the sealing washer is the consumer, and easy wearing and tearing and damage often need be changed, and the setting up of sealing washer has increased the frictional resistance of terminal surface moreover, has increased the consumption, influences swing efficiency.

Also as a chinese utility model patent (publication No. CN207145234U), in 2018, a swing rotor compressor with an end face seal structure is disclosed, wherein an end face seal groove is formed on the seal end face, and an end face seal cover is disposed to be closely attached to the seal end face, and further includes an end face seal disposed between the end face seal cover and the seal end face; the setting of this sealing member has improved airtight stability, but the structure is complicated to a plurality of auxiliary assembly need be used, the degree of difficulty of assembly and processing has been increased.

And the two structures can not be applied to the rolling rotor compressor due to the arrangement mode of the components, so that the application range is limited.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a sealing structure and a sealing method for a refrigeration rotor type compressor.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a seal structure for refrigerating rotor compressor, seal structure includes and sets up the oil groove at rotor seal end face and/or slider seal end face, oil groove department forms little air cavity, the oil groove contains rotor seal end face and/or the oil film of slider seal end face.

The oil groove is formed in the sealing end face between the rotor and the upper end cover (lower end cover), so that an oil film can be contained, a better oil seal is formed, the oil film can be automatically supplemented even under the blowing-off action of high-pressure gas, a layer of oil film is formed on the sealing end face all the time, the leakage of the high-pressure gas to the low-pressure end is reduced, the gas transmission amount of the compressor is ensured, and the power consumption of the compressor is reduced.

Specifically, the sealing structure can form a small air cavity in a sealing strip between an upper cylinder cover of the rotor compressor and a high-low pressure cavity on the end face of the rotor or the slide block and a sealing strip between a lower cylinder cover of the rotor compressor and the high-low pressure cavity on the end face of the rotor or the slide block through the arrangement of the oil grooves, the small air cavity plays a role in buffering and sealing in the process that high-pressure gas flows to the low-pressure cavity, can contain a small amount of oil at the same time, supplements an oil film on the high-low pressure sealing face back and forth, and plays a role in sealing in a gap between the sealing; even under the blowing-off action of the gas at the high-pressure end, the oil film can move back and forth on two surfaces of the oil groove, and a layer of oil film is formed on the sealing end surface all the time, so that the leakage of the gas at the high-pressure end to the low-pressure end is reduced, the gas transmission capacity of the compressor is ensured, and the power consumption of the compressor is reduced; the oil can be brought into the oil groove through an oil film in the movement clearance, and the oil can be supplemented by adopting an active oil supplementing mode.

The sealing structure has simple process, does not need to be provided with a fragile sealing ring or a complex sealing structure, can reduce the internal leakage of gas through the continuously formed oil film, increases the refrigerating capacity of the compressor, and obviously improves the consistency and the efficiency of product performance.

Because of the existence of high and low pressure environment, the oil in the oil groove can be slowly and continuously supplemented to the sealing end surface to form an oil film under the action of pressure difference; oil film consumption during actual operation can be expected, and oil can be replenished into the sump at intervals or during compressor maintenance to maintain a long-term sealing effect.

On the other hand, the oil groove that this seal structure set up for set up a gas buffering area on the sealing end face for high-pressure gas forms the buffering when leaking, reduces and reveals volume and speed, has guaranteed gas transmission volume and refrigeration effect.

Further, the oil groove is one of a V-shaped groove, an arc-shaped groove or a rectangular groove, and the depth of the oil groove is not more than 0.5 mm; the opening angle of the V-shaped oil groove is 30-150 degrees.

The depth of the oil groove is small, so that the oil groove can just contain an oil film, the stability of a rotor structure is prevented from being influenced by overlarge groove depth, and the processing amount can be reduced; the depth of the oil groove takes the factors of gas leakage, pressure difference, strength of the rotor and the slide block and the like into consideration; the limitation of the opening angle further ensures the effect that the oil in the oil groove forms an oil film.

Further, the depth of the oil groove is 0.2 mm; the opening angle of the oil groove is 60 degrees.

Furthermore, the gradient of the side, close to the air suction end, of the oil groove on the sealing end surface of the sliding block is smaller than the gradient of the side, close to the air exhaust end, of the oil groove.

The slopes of the two side walls of the oil groove are set to be different, the trend that oil in the oil groove forms an oil film can be changed, the slope of one side close to the air suction end (namely the high-pressure end) is smaller, and the oil film can be formed at the time, so that the oil film blown away by high-pressure gas can be offset.

Further, an oil storage structure is arranged at the bottom of the oil groove; the oil storage structure is a through groove corresponding to and communicated with the oil groove, and the cross-sectional size of the through groove is larger than that of the oil groove.

The oil storage structure can store more oil to continuously supplement the lost oil film, so that the frequency of oil supplement is reduced, and the service life is prolonged;

the structure that adopts the logical groove on the one hand is convenient for machine-shaping, and on the other hand can guarantee with every one section the oil groove corresponds and communicates, forms even fuel feeding, can not cause partial region fluid to pile up and partial region fluid to a small extent's the condition.

Furthermore, the cross section of the through groove is rectangular, circular arc, arc and the like.

Furthermore, two sides of the opening of the oil groove are respectively in arc transition arrangement with the rotor sealing end face or the sliding block sealing end face.

The arc transition is arranged to facilitate the formation of an oil film, the stress concentration condition of the edge of the oil groove caused by an acute angle can be reduced, and the overall strength and mechanical property of the rotor and the sliding block are ensured.

Furthermore, the rotor sealing end face and the sliding block sealing end face are of a split type connecting structure, the oil grooves are respectively and independently arranged on the rotor sealing end face and the sliding block sealing end face, and the oil grooves are respectively an annular oil groove arranged on the rotor sealing end face and a strip-shaped oil groove arranged on the sliding block sealing end face; an oil hole is formed in one end, close to the rotor, of the strip-shaped oil groove on the sliding block; one end of the oil hole is communicated with the strip-shaped oil groove, and the other end of the oil hole extends to the matching surface of the rotor and the sliding block.

That is to say when rotor compressor used is the roll formula rotor, rotor and slider are two independent parts, but the contact links together again, still can use the oil groove to carry out fluid seal to rotor seal face and slider seal face respectively this moment, do not receive split type structure to influence, sealed effect can obtain guaranteeing equally.

And the sliding block of the rolling type compressor is provided with the oil hole with smaller size, so that a small amount of oil in the oil groove enters the contact surface of the sliding block and the rotor through the oil hole to form oil lubrication, the friction resistance and the abrasion between the sliding block and the rotor are reduced, the working efficiency of the compressor can be improved, and the service life of the compressor is prolonged.

Preferably, the oil hole is inclined from an outer side to a center. The inclined arrangement is favorable for oil to move towards the middle of the contact surface of the oil and the contact surface of the oil, and a better lubricating effect is formed.

Furthermore, the rotor sealing end face and the sliding block sealing end face are of an integrated structure, the rotor sealing end face and the sliding block sealing end face are provided with integrated communicated oil grooves, and the oil grooves are in a hanging ring shape.

That is to say, when the rotor that the rotor compressor used is swing rotor formula, rotor and slider be the integral structure, and the oil groove at this moment also is the integral structure, directly adopts the mode of machining to process the oil groove that cross-sectional dimension is unanimous at the sealed terminal surface of rotor and slider, and the oil film that forms also can be more even in the oil groove of integration.

The oil liquid is lubricating oil, grease-like semisolid lubricating grease, or sealing liquid such as heat conduction oil and turbine oil. According to different working environments and the model size of the compressor, the matched oil can be selected for sealing and lubricating.

A sealing method for a refrigeration rotor compressor is characterized in that an oil liquid sealing groove is arranged on a rotor sealing end face and/or a sliding block sealing end face of the rotor compressor.

By adopting the oil liquid sealing method, the arrangement of accessories is reduced, the formation of a continuous oil film is ensured by using an oil groove, and the sealing effect is ensured; meanwhile, the sealing end face can be lubricated, the friction resistance and abrasion between the rotor and the rotor end cover and between the sliding block and the rotor end cover are reduced, the increase of a gap is avoided, and the service life of the compressor is prolonged.

Compared with the prior art, the invention has the beneficial effects that: 1. according to the sealing structure, the oil grooves are formed in the sealing end face between the rotor and the rotor end cover, so that an oil film can be contained, a better oil liquid seal is formed, the oil film can be automatically supplemented even under the blowing-off action of high-pressure gas, a layer of oil film is formed on the sealing end face all the time, the leakage of the high-pressure end gas to a low-pressure end is reduced, the gas transmission quantity of a compressor is ensured, and the power consumption of the compressor is reduced; 2. the sealing structure has simple process, can form a continuous oil film without arranging a fragile sealing ring or a complex sealing structure, reduces the material cost, and obviously improves the performance consistency and the efficiency of the compressor; 3. the oil groove arranged in the sealing structure is provided with a gas buffer zone relative to the sealing end surface, so that high-pressure gas is buffered when leaking, the leakage amount and the leakage speed are reduced, and the gas transmission amount and the refrigeration effect are ensured; 4. the oil groove oil liquid sealing mode is not limited by the type of the rotor, and the rotor can be applied to an integrated structure or a split structure, so that the application range is wide; 5. the existence of continuous fluid can also lubricate contact surface and seal end face, reduces frictional resistance and wearing and tearing between rotor, slider, the rotor end cover, avoids the increase in friction clearance, has prolonged the life of compressor.

Drawings

Fig. 1 is an overall schematic view of a sealing structure for a refrigerating rotor type compressor according to the present invention;

fig. 2 is an enlarged schematic view of an oil sump of a sealing structure for a refrigerating rotor type compressor according to the present invention containing an oil film;

fig. 3 is a schematic view of a cross section (a-a) of an oil sump of a sealing structure for a refrigerating rotor type compressor according to the present invention;

FIG. 4 is an enlarged view of FIG. 1 at D;

FIG. 5 is a schematic cross-sectional view taken at C-C of FIG. 4;

FIG. 6 is a schematic cross-sectional view of another sump of the present invention;

FIG. 7 is a schematic cross-sectional view of an arcuate oil groove of the present invention;

FIG. 8 is a schematic cross-sectional view of an oil sump and oil reservoir structure according to the present invention;

FIG. 9 is a schematic cross-sectional view of another oil sump and oil reservoir configuration of the present invention;

fig. 10 is an overall schematic view of another seal structure for a refrigerating rotor type compressor according to the present invention;

FIG. 11 is an enlarged view of a portion of section B-B of FIG. 10;

fig. 12 is an assembled operation view of a sealing structure for a refrigerating rotor type compressor according to the present invention;

fig. 13 is an assembled operational view of another sealing structure for a refrigerating rotor type compressor according to the present invention;

in the figure: 1. a slider; 2. a rotor; 3. sealing the end face of the sliding block; 4. a rotor seal end face; 5. an oil sump; 501. an annular oil groove; 502. a strip-shaped oil groove; 6. arc transition; 7. an oil storage structure; 8. an oil hole; 9. a cylinder block; 10. an eccentric wheel shaft; 11. a cylindrical guide rail; 12. an air suction port; 13. an exhaust port; 14. a small air cavity; 15. an oil film; 16. an upper end cover; 17. A lower end cover; 18. a first high-pressure and low-pressure cavity; 19. and a second high-low pressure cavity.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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 first embodiment is as follows:

as shown in fig. 1, a sealing structure for a refrigerating rotor type compressor having a rotor 2 and a slider 1 formed integrally; slider 1 with the homonymy of rotor 2 has slider seal face 3 and rotor seal face 4 respectively, seal structure does slider seal face 3 with the middle part of rotor seal face 4 sets up oil groove 5, oil groove 5 contains the oil film, contain a small amount of fluid in the oil groove 5.

A specific design case is shown in fig. 2, which is a schematic view of a part of an oil groove 5 containing an oil film 15 under a certain state, wherein a rotor 2 forms a rotor sealing end surface between an upper end cover 16 and a lower end cover 17 of a compressor respectively, the left side and the right side of the rotor 2 are a suction cavity and an exhaust cavity respectively, and a first high-pressure cavity 18 and a second high-pressure cavity 19 are formed by the suction cavity and the exhaust cavity having a pressure difference in the processes of suction and compression in the working process; oil grooves 5 are respectively arranged on the upper end face and the lower end face of the rotor 2, a small air cavity 14 is formed in the area where the oil grooves 5 are located, an oil film 15 is formed between the rotor 2 and the upper end cover 16 and the lower end cover 17, and the oil film 15 is contained under the action of the oil grooves 5 and the small air cavity 14. Under the influence of long-term reciprocating motion and high and low pressure, the size and the shape of the small air cavity 14 are changed correspondingly.

By arranging the oil groove 5, a small air cavity 14 can be formed in a sealing strip between an upper cylinder cover 16 of the rotor compressor and a high-low pressure cavity of the rotor 2 or a slide block end surface (see figure 2) and a sealing strip between a lower cylinder cover 17 of the rotor compressor and high-low pressure cavities (18 and 19) of the rotor or the slide block end surface (see figure 2), the small air cavity 14 plays a role in buffering and sealing in the process that high-pressure gas flows to the low pressure cavity, can contain a small amount of oil at the same time, supplements an oil film 15 of the high-low pressure sealing surface back and forth, and the oil film 15 plays a role in sealing in a gap of the sealing surface; even under the blowing-off action of the high-pressure end gas, the oil films 15 can move back and forth on two sides of the oil groove 5, and a layer of oil film 15 is formed on the sealing end face all the time, so that the leakage of the high-pressure end gas to the low-pressure end is reduced, the gas transmission quantity of the compressor is ensured, and the power consumption of the compressor is reduced.

Because of the existence of high and low pressure environment, the oil in the oil groove 5 can be slowly and continuously supplemented to the sealing end surface to form an oil film under the action of pressure difference; oil film consumption during actual operation can be expected, and oil can be replenished to the seal face or oil groove at intervals or during compressor maintenance to maintain long-term sealing effect.

On the other hand, the oil groove 5 of the sealing structure is provided with a gas buffer zone relative to the sealing end surface, so that high-pressure gas forms buffer when leaking, the leakage amount and the leakage speed are reduced, and the gas transmission amount and the refrigeration effect are ensured.

Further, as shown in fig. 3, the oil groove 5 is a "V" shaped groove, and the depth of the oil groove 5 is not more than 0.5 mm; the opening angle of the oil groove 5 of the "V" shape is 60 degrees.

The depth of the oil groove 5 is small, so that the oil groove can just contain an oil film, the stability of a rotor structure is prevented from being influenced by overlarge groove depth, and the processing amount can be reduced; the depth of the oil groove 5 takes the factors of gas leakage, pressure difference, strength of the rotor and the slide block and the like into consideration; the limitation of the opening angle further ensures the effect that the oil in the oil groove forms an oil film.

As shown in fig. 4 and 5, the oil groove 5 (vertical oil groove) on the slider sealing end surface 3 intersects and is tangent with the oil groove 5 (annular oil groove) on the rotor sealing end surface 4, but the depths of the two are different, the opening surfaces of the oil grooves 5 are in the same plane, the bottom of the oil groove has a height difference, the depth of the vertical oil groove on the slider sealing end surface 3 is slightly smaller than the depth of the annular oil groove on the rotor sealing end surface 4, and the area of the rotor affected by high-pressure gas is larger, so that the arrangement is favorable for forming an oil film on the rotor sealing end surface.

Furthermore, two sides of the opening of the oil groove 5 are respectively in arc transition with the sealing end face of the rotor or the sealing end face of the sliding block.

The arc transition 6 is favorable for forming an oil film, the stress concentration condition of the edge of the oil groove caused by an acute angle can be reduced, and the integral strength and mechanical property of the rotor and the sliding block are ensured.

Example two:

the present embodiment is different from the first embodiment in that the shape of the oil groove is set differently.

Specifically, as shown in fig. 6, the slope of the oil groove 5 on the slider sealing end surface 3 near the suction end is smaller than the slope near the discharge end.

The slopes of the two side walls of the oil groove 5 are set to be different, so that the tendency of oil liquid in the oil groove 5 to form an oil film can be changed, and the slope of one side close to the air suction end (namely the high-pressure end) is smaller, so that the oil film can be formed at this time, and the oil film blown away by high-pressure gas can be offset.

As shown in fig. 7, the oil groove 5 has an arc-shaped structure, and the arc-shaped oil groove 5 has no sharp angles or acute angles, so that the stress concentration phenomenon is less during the long-term reciprocating motion, and the structural stability of the rotor and the sliding block is better maintained.

Example three:

the present embodiment is different from the first embodiment in that an oil storage structure is provided.

Specifically, as shown in fig. 8, an oil storage structure 7 is further disposed at the bottom of the oil groove 5; the oil storage structure 7 is a through groove corresponding to and communicated with the oil groove 5, and the through groove is circular.

The oil storage structure 7 can store more oil to continuously supplement the lost oil film, so that the frequency of oil supplement is reduced, and the service life is prolonged;

by adopting the structure of the through groove, on one hand, the oil groove can be machined and formed, on the other hand, the oil groove can be ensured to correspond and communicate with each section, uniform oil supply is formed, and the condition that oil liquid in a partial region is accumulated and the oil liquid in the partial region is less can not be caused.

Example four:

the present embodiment is different from the first embodiment in that another oil storage structure is provided.

Specifically, as shown in fig. 9, an oil storage structure 7 is further disposed at the bottom of the oil groove 5; the oil storage structure 7 is a through groove corresponding to and communicated with the oil groove 5, and the through groove is rectangular; the cross-sectional dimension of the through groove is larger than that of the oil groove. The rectangular through groove can accommodate more oil liquid, and the stroke and the area of the gas buffer zone are increased equivalently.

Example five:

as shown in fig. 10 and 11, the rotor sealing end face 4 and the slider sealing end face 3 are in a split connection structure, the oil grooves are respectively and independently arranged on the rotor sealing end face 4 and the slider sealing end face 3, and the oil grooves are respectively an annular oil groove 501 arranged on the rotor sealing end face 4 and a strip-shaped oil groove 502 arranged on the slider sealing end face 3; an oil hole 8 is also formed in one end, close to the rotor 2, of the strip-shaped oil groove 502 on the sliding block; one end of the oil hole 8 is communicated with the strip-shaped oil groove 502, and the other end of the oil hole extends to the matching surface of the rotor 2 and the sliding block 1.

And the small-sized oil hole 8 is arranged on the sliding block of the rolling type compressor, so that a small amount of oil in the strip-shaped oil groove 502 enters the contact surface of the sliding block 1 and the rotor 2 through the oil hole 8 to form oil lubrication, the friction resistance and the abrasion of the sliding block 1 and the rotor 2 are reduced, the working efficiency of the compressor can be improved, and the service life of the compressor is prolonged.

Preferably, the oil hole 8 is formed to be inclined from the outside toward the center. The inclined arrangement is favorable for oil to move towards the middle of the contact surface of the oil and the contact surface of the oil, and a better lubricating effect is formed.

Example six:

the embodiment provides a sealing method for a refrigeration rotor type compressor and an operation mode thereof.

The sealing method is that an oil liquid sealing groove is arranged on a rotor sealing end face and/or a sliding block sealing end face of the rotor type compressor.

As shown in fig. 12, in the swing type rotor structure, the rotor 2 is arranged in the cylinder block 9, the center of the rotor 2 is provided with an eccentric wheel shaft 10, one end of the slider 1 is connected to a cylindrical guide rail 11, an air inlet 12 is used for air inlet, an air outlet 13 is used for air outlet, and a pressure difference exists between the area a and the area b (the area a and the area b are switched between high-pressure and low-pressure cavities according to the states of air inlet and air outlet); for example, when the compressor works, the area a is in a high-pressure state due to the fact that air is admitted, formed high-pressure airflow can leak to the area b at the sealing end surfaces of the rotor 2 and the sliding block 1, and due to the fact that the oil groove 5 exists, the oil groove 5 contains (sucks) an oil film, the oil film on the sealing end surfaces is not prone to being blown away, and gas cannot leak; even if the oil film is blown away after a long-time work, the oil in the oil groove 5 can be replenished in time to form a new oil film, so that the sealing effect is continuously formed, and meanwhile, the sealing end face is lubricated.

As shown in fig. 13, the swing type rotor structure is provided with a rotor 2 disposed in a cylinder block 9, an eccentric shaft 10 is disposed in the middle of the rotor 2, and one end of the slider 1 abuts against a spring and the other end abuts against the outer contour of the rotor 2.

An annular oil groove 501 is formed in the sealing end face of the rotor 2, and a strip-shaped oil groove 502 is formed in the sealing end face of the sliding block 1; the strip-shaped oil groove 502 is a non-penetrating type, and it is sufficient to ensure that an oil film can be formed on the sealing end surface of the region where the high-low pressure cavity is located.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The sealing structure for the refrigeration rotor compressor is characterized in that an oil groove is formed in the sealing end face of a rotor and/or the sealing end face of a sliding block, a small air cavity is formed in the oil groove, and the oil groove contains an oil film on the sealing end face of the rotor and/or the sealing end face of the sliding block.

2. A sealing structure for a refrigerating rotor-type compressor according to claim 1, wherein said oil groove is one of a "V" -shaped groove, an arc-shaped groove or a rectangular groove, and a depth of said oil groove is not more than 0.5 mm; the opening angle of the V-shaped oil groove is 30-150 degrees.

3. A sealing structure for a refrigerating rotor compressor according to claim 1 or 2, wherein the oil groove has a depth of 0.2 mm; the opening angle of the oil groove is 60 degrees.

4. A sealing structure for a refrigerating rotor compressor in accordance with claim 1, wherein a slope of a side of the oil groove near a suction end of the slider sealing end surface is smaller than a slope of a side near a discharge end.

5. A sealing structure for a refrigerating rotor compressor according to claim 1, wherein an oil storage structure is further provided at a bottom of the oil groove; the oil storage structure is a through groove corresponding to and communicated with the oil groove, and the cross-sectional size of the through groove is larger than that of the oil groove.

6. A sealing structure for a refrigerating rotor compressor, according to claim 5, characterized in that said through slot has a rectangular or arc-shaped cross section.

7. A sealing structure for a refrigerating rotor compressor according to claim 1, wherein both sides of the opening of the oil groove are respectively arranged in arc transition with the rotor sealing end face or the slider sealing end face.

8. A sealing structure for a refrigerating rotor compressor according to claim 1, wherein the rotor sealing end face and the slider sealing end face are of a split type connection structure, the oil grooves are respectively and independently provided on the rotor sealing end face and the slider sealing end face, and the oil grooves are respectively an annular oil groove provided on the rotor sealing end face and a strip-shaped oil groove provided on the slider sealing end face; an oil hole is formed in one end, close to the rotor, of the strip-shaped oil groove on the sliding block; one end of the oil hole is communicated with the strip-shaped oil groove, and the other end of the oil hole extends to the matching surface of the rotor and the sliding block; the oil hole is arranged in an inclined mode.

9. A seal structure for a refrigerating rotor compressor according to claim 1, wherein the rotor seal end face and the slider seal end face are of an integral structure, the rotor seal end face and the slider seal end face are provided with the oil groove communicated integrally, and the oil groove is in a shape of a hanging ring.

10. A sealing method of a sealing structure for a refrigerating rotor compressor according to claim 1, wherein the sealing method is to provide an oil sealing groove at a rotor sealing end face and/or a slider sealing end face of the rotor compressor.