CN113482920B

CN113482920B - Scroll sealing device, scroll compressor, and refrigeration device

Info

Publication number: CN113482920B
Application number: CN202110908155.5A
Authority: CN
Inventors: 李业林; 史正良; 贾波; 陈晓晓; 郑慧芸; 胡文祥
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date: 2021-08-09
Filing date: 2021-08-09
Publication date: 2023-03-24
Anticipated expiration: 2041-08-09
Also published as: CN113482920A

Abstract

The application provides a scroll plate sealing device, a scroll compressor and a refrigerating device. This vortex dish sealing device includes the whirlpool dish, and the whirlpool dish includes driving disk (110) and quiet dish (210), and the base material hardness of driving disk (110) and quiet dish (210) is different, and driving disk vortex board (111) addendum of driving disk (110) has driving disk seal groove (112), is provided with driving disk sealing strip (120) in driving disk seal groove (112), and quiet dish vortex board (211) addendum of quiet dish (210) has quiet dish seal groove (212), is provided with quiet dish sealing strip (220) in quiet dish seal groove (212), driving disk seal groove (112) with at least one in quiet dish seal groove (212) is seted up on the seal groove lateral wall of the higher side of pressure and is link up drainage mouth (213) of this side lateral wall. According to the vortex disc sealing device, the vortex disc sealing device can be optimized, and the condition that a compression cavity at the tail of the vortex disc leaks is effectively avoided.

Description

Scroll sealing device, scroll compressor and refrigerating device

Technical Field

The application relates to the technical field of compressors, in particular to a scroll plate sealing device, a scroll compressor and a refrigerating device.

Background

The scroll compressor is popular among people due to the advantages of high efficiency, energy conservation, low noise, stable operation and the like, and is widely applied to the industries of automobile air conditioners and air compressors. The scroll compressor is mainly formed by mutually meshing movable scrolls and static scrolls of two double-function equation scrolls, in the compression operation process, the static scroll is fixed on a frame, the movable scroll is driven by a driving device and is restricted by an anti-rotation mechanism, the movable scroll revolves around the axial line of the static scroll, and the position and the volume of a crescent cavity formed between the two scrolls are continuously changed. After the gas enters the first crescent sealing chamber from the gas inlet, the gas sealed in the sealing chambers is continuously compressed to gradually increase the pressure because the sealing chambers gradually move from the periphery to the center of the scroll along with the rotation of the movable scroll and the volume is continuously reduced. However, during the compression process, radial leakage and axial leakage occur in the radial and axial clearances, respectively, and these leakages have a series of adverse effects on the compression performance of the compressor, such as reduction in the discharge capacity of the compressor, reduction in volumetric efficiency, and the like.

The radial seal of the pump body of the scroll compressor is adjusted by a corresponding balance weight block of an adjusting mechanism and the like, the traditional axial seal is realized by improving the processing precision of parts, a seal groove can be formed at the tooth top of a scroll of a movable scroll disk and a static scroll disk, a seal strip made of a high polymer material is placed in the seal groove, and the seal strip is floated under the action of high-pressure gas force, so that the sealing effect is realized.

However, for the sealing strip with lower hardness, because high-pressure gas can only enter the sealing groove through the opening of the end face of the central part of the scroll plate, and exerts a pressure effect on the sealing strip, the sealing strip is pressed and sealed, and because the sealing strip is softer, the tail part of the sealing strip is far away from the head part, the high-pressure gas entering from the opening of the end face is limited and cannot smoothly reach the tail end of the sealing strip, the tail end of the soft sealing strip cannot be smoothly lifted, and further the tail part compression cavity of the scroll plate is leaked.

Disclosure of Invention

Therefore, the technical problem to be solved by the present application is to provide a scroll sealing device, a scroll compressor and a refrigeration device, which can optimize the scroll sealing device and effectively avoid the leakage of the compression cavity at the tail of the scroll.

In order to solve the problem, the application provides a vortex dish sealing device, including whirlpool dish, whirlpool dish includes movable disk and quiet dish, the substrate hardness of movable disk and quiet dish is different, the whirlpool board tooth top of movable disk has movable disk seal groove, be provided with movable disk sealing strip in the movable disk seal groove, the whirlpool board tooth top of quiet dish has quiet dish seal groove, be provided with quiet dish sealing strip in the quiet dish seal groove, at least one in movable disk seal groove and the quiet dish seal groove has seted up the drainage mouth that link up this side lateral wall on the seal groove lateral wall of the higher side of pressure.

Preferably, the drainage port is formed at least at the initial end of the core part of the sealing groove.

Preferably, the drainage port is formed along the scroll profile of the scroll, and the drainage port satisfies the relation among the different position points (xi, yi) on the scroll profile, the scroll pitch Pt, the scroll thickness t, the involute angle phi i and the profile rotation angle theta:

preferably, the wrap pitch Pt =8 to 30mm, the wrap thickness t =3 to 8mm, the involute angle Φ i =0 to 20 °, and the profile rotation angle θ =0 to 3 °.

Preferably, a plurality of compression areas are formed between the movable disc and the static disc, wherein the compression area communicated with the air suction port is a low-pressure area, the compression area communicated with the air exhaust port is a high-pressure area, the middle compression area is a middle-pressure area, the number of the drainage ports of the high-pressure area is N1, the number of the drainage ports of the middle-pressure area is N2, the number of the drainage ports of the low-pressure area is N3, and N1 is more than N2 and more than N3.

Preferably, N1=2N2, N2=2N3.

Preferably, the area Sa of the vents in the heart of the high pressure zone is greatest and the areas of the other vents are equal.

Preferably, the drainage port is arranged corresponding to the groove bottom of the sealing groove.

Preferably, the drainage port is arranged corresponding to the groove top of the sealing groove.

Preferably, the height of the drainage port is H, the depth of the sealing groove is H, and H = (1/5-1/2) H.

Preferably, the vents located in the high pressure zone are located at the bottom of the sealing groove and the vents located in the mid pressure zone and the low pressure zone are located at the top of the sealing groove.

According to another aspect of the present application, there is provided a scroll compressor including a scroll sealing device as described above.

According to another aspect of the present application, there is provided a refrigeration apparatus comprising a scroll sealing apparatus as described above.

The application provides a vortex dish sealing device, including whirlpool dish, whirlpool dish includes driving disk and quiet dish, the base material hardness of driving disk and quiet dish is different, the whirlpool board tooth top of driving disk has the driving disk seal groove, be provided with the driving disk sealing strip in the driving disk seal groove, the whirlpool board tooth top of quiet dish has quiet dish seal groove, be provided with quiet dish sealing strip in the quiet dish seal groove, set up the drainage mouth that link up this side lateral wall on the seal groove lateral wall of the higher side of pressure in at least one in driving disk seal groove and the quiet dish seal groove. Through set up the drainage mouth that link up this side lateral wall on the seal groove lateral wall of the higher side of pressure, can increase high-pressure gas's access channel, the high-pressure gas volume of introducing is bigger for high-pressure gas can enter into the seal groove more fully in, exert sufficient pressure to the sealing strip, and can fully reach the sealing strip tail end, guarantee that the sealing strip tail end can fully float and lift up, and then guarantee that the middling pressure district and the low-pressure region homoenergetic of vortex dish can form effective seal.

Drawings

FIG. 1 is an exploded view of a scroll seal assembly according to one embodiment of the present application;

FIG. 2 is an exploded view of a scroll seal assembly according to one embodiment of the present application;

FIG. 3 is a cross-sectional structural view of a scroll seal assembly according to one embodiment of the present application;

FIG. 4 is a schematic illustration of a static plate configuration of a scroll sealing apparatus according to an embodiment of the present application;

FIG. 5 is an enlarged partial view of a scroll seal assembly at A according to one embodiment of the present application;

FIG. 6 is an enlarged partial view of the scroll seal assembly at B in accordance with one embodiment of the present application;

FIG. 7 is a cross-sectional view of a stationary plate of a scroll seal assembly according to an embodiment of the present application;

FIG. 8 is an enlarged schematic view of FIG. 7 at C;

FIG. 9 is a schematic view of the operation of the bleed ports of the scroll sealing apparatus according to one embodiment of the present application.

The reference numbers are given as:

100. a movable plate assembly; 110. a movable plate; 111. a movable disc vortex plate; 112. a movable disc sealing groove; 120. a movable disc sealing strip; 200. a stationary disc assembly; 210. a stationary disc; 211. a stationary plate vortex plate; 212. a static disc sealing groove; 212-1, high side sidewall; 212-2, low pressure side sidewall; 213. a drainage opening; 213a, a first drainage opening; 213b, a second drainage opening; 213c, a third drainage opening; 213n, the nth drainage opening; 220. a stationary disc seal strip; 230. an exhaust valve plate; 240. a discharge valve plate baffle; 250. a pressure relief valve plate; 260. a pressure relief valve plate baffle.

Detailed Description

Referring to fig. 1 to 9 in combination, according to an embodiment of the present application, a scroll sealing device includes a scroll including a movable platen 110 and a fixed platen 210, base materials of the movable platen 110 and the fixed platen 210 have different hardness, a movable platen sealing groove 112 is formed at a top of a movable platen scroll plate 111 of the movable platen 110, a movable platen sealing strip 120 is disposed in the movable platen sealing groove 112, a fixed platen sealing groove 212 is formed at a top of a fixed platen scroll plate 211 of the fixed platen 210, a fixed platen sealing strip 220 is disposed in the fixed platen sealing groove 212, the movable platen sealing strip 120 and the fixed platen sealing strip 220 have different hardness, a sealing strip having lower hardness is disposed in the scroll having higher hardness, and a sealing strip having higher hardness is disposed in the scroll having lower hardness.

This vortex dish sealing device selects the friction of joining in marriage each vortex dish according to the different grade type and the different hardness of vortex dish substrate material is vice, can avoid the condition that the wearing and tearing appear adhereing in the operation of the same race material pump body, soft materials and hard materials join in marriage vice the grinding effect that is of friction each other and can be better, promptly at the operation in-process, the base member of hard materials is very hard, hardly worn and torn, hard materials's resistance to compression degree is high simultaneously, soft materials is hardly embedded into the stereoplasm substrate, consequently, soft materials also hardly worn and torn, the powder that soft materials produced simultaneously at the friction in-process also can play lubricated effect, the joining in marriage of these two kinds of softnesses is vice just can reach wear-resisting and self-lubricating effect simultaneously, thereby make the long-term reliability of the compressor pump body obtain promoting.

The pump body assembly of the scroll compressor comprises a movable disc assembly 100 and a fixed disc assembly 200, wherein the movable disc assembly 100 comprises a movable disc 110 and a movable disc sealing strip 120, and the fixed disc assembly 200 comprises a fixed disc 210, a fixed disc sealing strip 220, an exhaust valve plate 230, an exhaust valve plate baffle 240, a pressure relief valve plate 250 and a pressure relief valve plate baffle 260.

A movable disk seal 120 is mounted in a movable disk seal groove 112 at the tooth tips of the movable disk wrap 111 of the movable disk 110, and a fixed disk seal 220 is mounted in a fixed disk seal groove 212 at the tooth tips of the fixed disk wrap 211 of the fixed disk 210.

The substrate of movable disk 110 is inequality with the substrate of quiet dish 210, and respective material hardness is also different, the condition of adhesion wearing and tearing appears when moving in this way can be avoided the same kind of material pump body, soft materials and hard material match vice the grinding effect can be better as the friction each other, promptly at the operation in-process, the base member of hard material is very hard, hardly by wearing and tearing, hard material's resistance to compression degree is high simultaneously, soft materials is difficult to be embedded into in the stereoplasm substrate, consequently soft materials also hardly is worn and torn, soft materials also can play lubricated effect at the powder that the friction in-process produced simultaneously, the vice effect that just can reach wear-resisting and self-lubricating simultaneously of joining in marriage of these two kinds of softnesses, thereby make the long-term reliability of the compressor pump body obtain promoting.

In one embodiment, the base material hardness of the stationary platen 210 is greater than the base material hardness of the moving platen 110, and the moving platen seal 120 is greater than the stationary platen seal 220.

In another embodiment, the base material hardness of the stationary platen 210 is less than the base material hardness of the moving platen 110, and the moving platen seal 120 is less than the stationary platen seal 220.

In one embodiment, the density of the base material of the moving plate 110 is less than that of the stationary plate 210, which ensures that the moving plate 110 has a lighter material. After the movable disc 110 is made of a lightweight metal material, the centrifugal force generated by the scroll compressor after high-speed operation is much smaller than that of the existing material with a larger specific gravity, so that the vibration and noise generated by the compressor after high-frequency and high-speed operation are also smaller, and the design also conforms to the development direction of high-speed and lightweight compressors.

Meanwhile, the movable disc 110 can be made of a light-weight material with high hardness, and at the moment, the movable disc sealing strips 120 ground by the light-weight metal movable disc 110 are replaced by self-lubricating soft sealing strips with relatively low hardness, so that the condition that the light-weight metal movable disc 110 is ground out of pits after long-term operation can be avoided, and the sealing performance between the axial directions of the pump body of the scroll compressor cannot be reduced.

In one embodiment, the hardness of the scroll having a higher hardness is D1, the hardness of the scroll having a lower hardness is D2, and D1= (9/8 to 3) D2. When the two friction pairs are in the hardness range of the pair, the scroll plate with lower hardness cannot be abraded by the scroll plate with higher hardness, and the friction coefficient is relatively lower.

In one embodiment, D1= 180-288hb, and D2= 96-160 HB, the hardness of cast irons and aluminum alloys can be more conveniently controlled by various heat treatment processes.

In one embodiment, the higher durometer weatherstrip has a durometer of d1, the lower durometer weatherstrip has a durometer of d2, and d1= (1-21/13) d2. The hardness of the sealing strip is controlled within the range, the range corresponds to the hardness range of the cast iron disc and the aluminum alloy disc, the sealing strip with higher hardness is used for grinding with the cast iron disc with high hardness, the sealing strip with lower hardness is used for grinding with the aluminum alloy disc with low hardness, and therefore after matching, the aluminum alloy vortex disc with lower hardness cannot be ground into a groove by the sealing strip with higher hardness.

In one embodiment, d1= 67-84hsd, d2= 50-66 HSD. And controlling the hardness range, wherein the friction coefficient of the sealing strip with higher hardness and the cast iron with high hardness and the friction coefficient of the sealing strip with lower hardness and the aluminum alloy with low hardness are minimum during opposite grinding, the friction power consumption is also minimum, and the wear rates among the sealing strip, the cast iron and the aluminum alloy are also minimum.

When the base material hardness of the static disc 210 is greater than the base material hardness of the dynamic disc 110, and the hardness of the dynamic disc sealing strip 120 is greater than the hardness of the static disc sealing strip 220, in order to avoid the surface of the scroll base plate with higher hardness from being milled out of pits by the hard sealing strips, the hard sealing strips are replaced by soft sealing strips, that is, the soft static disc sealing strip 220 is filled in the static disc sealing groove 212 of the static disc vortex plate 211 tooth crest of the static disc 210 with higher base material hardness, and the dynamic disc sealing strip 120 with higher hardness than the soft sealing strip is filled in the dynamic disc sealing groove 112 of the dynamic disc vortex plate 111 tooth crest of the dynamic disc 110 with lower base material hardness.

In one embodiment, the base material of the scroll disk having a higher hardness is one of gray cast iron, nodular cast iron, vermicular cast iron, malleable cast iron, and graphite steel, and the base material of the scroll disk having a lower hardness is an aluminum alloy. The graphite is arranged in the cast iron materials, so that the self-lubricating effect can be achieved.

In one embodiment, the aluminium alloy is one of a hypoeutectic aluminium silicon alloy and a hypereutectic aluminium silicon alloy. Because the silicon content of the aluminum alloys is higher, the aluminum alloys have better wear resistance, and the friction coefficients of the aluminum alloys are smaller when the aluminum alloys are matched with the cast iron disc for counter-grinding.

In this embodiment, when the stationary disc 210 is made of cast iron and the moving disc 110 is made of aluminum alloy, the adhesion and wear between the scroll discs made of different materials will not occur, and the friction coefficient and wear loss of the cast iron and aluminum alloy to the magic block are much smaller than those of aluminum alloy, steel, hard coating and the like, so that the wear can be reduced more effectively and the service life can be prolonged.

In one embodiment, the sealing strip material is a resin material.

As a preferred example, the sealing tape having a low hardness is made of at least one of Polytetrafluoroethylene (PTFE), polychlorotrifluoroethylene (PCTFE), soluble Polytetrafluoroethylene (PFA), polyhexafluoropropylene (PFEP), and polyvinylidene fluoride (PVDF), and the sealing tape having a high hardness is made of at least one of Polyetheretherketone (PEEK), polycarbonate (PC), polyamide (PA), polyphenylene oxide (PPO), polyphenylene sulfide (PPS), polyoxymethylene (POM), polyethylene terephthalate (PET), and polybutylene terephthalate (PBT).

In one embodiment, the higher hardness scroll has a bleed 213 formed through the side wall of the seal groove on the higher pressure side. For the sealing strip with lower hardness, because high-pressure gas can only enter the sealing groove through the opening of the end face of the central part of the scroll plate, and the sealing strip is exerted with pressure, the sealing strip is compressed and sealed, however, because the sealing strip is softer, the tail part of the sealing strip is far away from the head part, the high-pressure gas entering from the opening of the end face is limited, and cannot smoothly reach the tail end of the sealing strip, the tail end of the soft sealing strip cannot be lifted smoothly, and further the tail compression cavity of the scroll plate is leaked. And set up the drainage mouth 213 that link up this side lateral wall on the seal groove lateral wall of the higher side of pressure, can increase high-pressure gas's access channel, the high-pressure gas volume of introducing is bigger for high-pressure gas can enter into the seal groove more fully, exerts sufficient pressure to the sealing strip, and can fully reach the sealing strip tail end, guarantees that the sealing strip tail end can fully float and lift up, and then guarantees that the middling pressure district and the low-pressure region homoenergetic of vortex dish can form effective seal.

Because the soft static disc sealing strip 220 is embedded in the static disc sealing groove 212 at the tooth crest of the static disc scroll plate 211 of the static disc 210 with relatively high base material hardness, the static disc sealing strip 220 has a condition that only part of the static disc sealing strip is lifted or the static disc sealing strip is not lifted at all in the pressure section and the low pressure section in the operation process of the compressor, which causes the problems of floating delay and discontinuous floating of the static disc sealing strip in the operation process of the compressor. A plurality of drainage ports 213 are formed in the high-pressure side wall 212-1 of the static disc sealing groove 212 at the tooth crest of the static disc vortex plate 211 of the static disc 210, and the low-pressure side wall 212-2 of the static disc sealing groove 212 at the tooth crest of the static disc vortex plate 211 of the static disc 210 is not processed, so that the problems are solved, high-pressure gas is prevented from being leaked from the low-pressure side wall 212-2 of the static disc sealing groove 212 at the tooth crest of the static disc vortex plate 211 of the static disc 210, the axial sealing performance between the pump bodies of the scroll compressor is improved through the drainage ports 213, and the performance of the scroll compressor is further improved.

In one embodiment, the drainage port 213 is opened at least at the beginning of the center of the sealing groove. In this embodiment, the center of the seal groove is the position of the center of the scroll plate, and the gas pressure at this position is the largest, so that the high-pressure gas introduced into this position enters the seal groove, and the effect of lifting the seal strip is more obvious.

In one embodiment, the vents 213 are formed along the wrap profile of the scroll plate, and the vents 213 satisfy the relationship between the wrap pitch Pt, wrap thickness t, involute angle phi i, and profile rotation angle theta at different points xi, yi on the wrap profile:

alpha is the initial spread angle of the scroll profile, phi 1 is the first involute spread angle of the scroll profile, and phi 2 is the second involute spread angle of the scroll profile, so that the drainage ports can be always kept on the scroll profile, and a good distribution structure is achieved.

The position of the vent 213 is defined using the above formula, which ensures that the vent 213 is disposed along the profile without deviation.

In one embodiment, the scroll pitch Pt = 8-30 mm, the scroll thickness t = 3-8 mm, the involute angle phi = 0-20 °, and the profile rotation angle θ = 0-3 °, thus ensuring that the compressor moving disc 110 and the static disc 210 compress the gas effectively, and ensuring that the high-pressure gas, the medium-pressure region and the low-pressure region are arranged in sequence on the drainage port 213 along the scroll profile.

In one embodiment, the movable platen 110 and the stationary platen 210 define a plurality of compression zones therebetween, wherein the compression zone communicating with the suction port is a low pressure zone, the compression zone communicating with the discharge port is a high pressure zone, the compression zone in the middle is a medium pressure zone, the number of vents 213 in the high pressure zone is N1, the number of vents 213 in the medium pressure zone is N2, the number of vents 213 in the low pressure zone is N3, and N1 > N2 > N3.

In this embodiment, when the base hardness of the stationary plate 210 is greater than the base hardness of the movable plate 110 and the hardness of the movable plate seal 120 is greater than the hardness of the stationary plate seal 220, the number of vents 213 in the high pressure zone is greater than the number of vents in the medium pressure zone, which is greater than the number of vents in the low pressure zone, i.e., the number N of vents 213 in different pressure zones is sufficient: n1 > N2 > N3, after the quantity of high-pressure region drainage mouth 213 is more than intermediate pressure district and low-pressure region, do benefit to the high-pressure gas of high-pressure region to introduce in quiet dish seal groove 212, this high-pressure gas of introducing can be more, and the pneumatics that act on with soft quiet dish sealing strip 220 also can be bigger, and the floating seal performance of soft quiet dish sealing strip 220 also can be better.

When the base hardness of the static disc 210 is less than that of the dynamic disc 110 and the hardness of the dynamic disc sealing strip 120 is less than that of the static disc sealing strip 220, the number of the drainage openings 213 in the high-pressure area is more than that of the drainage openings in the medium-pressure area, and the number of the medium-pressure area is more than that of the drainage openings in the low-pressure area, that is, the number N of the drainage openings 213 in different pressure areas satisfies the following conditions: n1 > N2 > N3, after the quantity of high-pressure area drainage mouth 213 is more than middling pressure district and low-pressure area, do benefit to the high-pressure gas with the high-pressure district and introduce in the movable disk seal groove 112, this high-pressure gas of introduction can be more, and the gas force that acts on with soft movable disk sealing strip 120 also can be bigger, and the floating seal performance of soft movable disk sealing strip 120 also can be better.

As a preferred embodiment, N1=2N2, N2=2N3. Set up like this and to guarantee that the drainage mouth quantity of high nip is more than the middling pressure district, and the drainage mouth quantity of middling pressure district is more than the low-pressure district, and 2 times more back respectively, and the drainage effect reaches the best, if the multiple is greater than 2 times, the high-pressure gas fills the revealing of drainage mouth and will be greater than the effect of introducing, and the multiple is big more, reveals and will be more serious.

In one embodiment, the areas Sa of the vents 213 in the high pressure zone core are the largest, and the areas of the other vents 213 are equal. To further facilitate the introduction of high pressure gas from the high pressure zone into the stationary disk seal groove 212, the area Sa of the vent 213a in the center of the high pressure zone of the stationary disk 210 is set to be the largest, while the areas Sb, sc 8230of the other high pressure zone vents, the middle pressure zone vents, and the low pressure zone vents are identical, i.e., sa > Sb = Sc = 8230 = Sn, where Sa is the area of the first vent 213a, sb is the area of the second vent 213b, sc is the area of the third vent 213c \ 8230, and Sn is the area of the third vent 213 n. This design further facilitates the forming of the vents 213. The high pressure zone center portion herein refers to a center region where the high pressure zone communicates with the exhaust port. When the base material hardness of the static disc 210 is less than that of the movable disc 110, and the hardness of the movable disc sealing strip 120 is less than that of the static disc sealing strip 220, the principle is the same, and detailed description is omitted.

In one embodiment, the drainage port 213 is disposed at the bottom of the sealing groove, so that the high-pressure air directly enters the gap between the sealing strip and the bottom of the sealing groove through the drainage port 213, the flow path of the high-pressure air is reduced, the high-pressure air acts on the sealing strip quickly, the air pressure loss is reduced, the working efficiency of the high-pressure air is improved, and the axial sealing effect of the scroll sealing device is ensured more effectively.

In one embodiment, the drainage ports 213 are positioned corresponding to the groove tops of the sealing grooves. When drainage mouth 213 sets up in high-pressure region, neutral pressure district and low-pressure region respectively, drainage mouth 213 corresponds the groove top setting of seal groove, can make the drainage mouth 213 of neutral pressure district and low-pressure region mainly regard as supplementary tonifying qi passageway, under this kind of condition for the drainage mouth sets up the groove top position at the seal groove, can effectively avoid entering into the high-pressure gas in the seal groove from the high-pressure region and take place to leak at neutral pressure district or low-pressure region, guarantees the axial seal effect of sealing strip.

In one embodiment, vents 213 at high pressure zones are positioned to correspond to the groove bottom of the seal groove and vents 213 at intermediate pressure and low pressure zones are positioned to correspond to the groove top of the seal groove. This kind of structure can carry out different position settings according to the effect of different regional drainage mouth 213, can enough guarantee to introduce sufficient high-pressure gas flow, exerts sufficient pressure to the sealing strip, can avoid again taking place high-pressure gas at the leakage problem of intermediate pressure district and low-pressure area, improves high-pressure gas's utilization efficiency.

In one embodiment, the height of the drainage opening 213 is H, the depth of the sealing groove is H, and H = (1/5 to 1/2) H. This ensures that the vent 213 will not be proximate the bottom of the seal groove, so that high pressure gas is blocked and less high pressure gas will leak from the vent.

Referring to fig. 9, when the hardness of the base material of the static disc 210 is greater than that of the moving disc 110, and the hardness of the moving disc sealing strip 120 is greater than that of the static disc sealing strip 220, during the operation of the scroll compressor, the pressure of the high-pressure gas at the high-pressure side in the compression cavity of the high-pressure region is P1, the high-pressure gas firstly passes through the high-pressure side of the static disc sealing strip 220 from the drainage port 213 and the gap between the moving disc 110 and the static disc 210, and then enters the bottom of the static disc sealing groove 212, the soft static disc sealing strip 220 is lifted by the high-pressure gas, so that the static disc sealing strip 220 is tightly attached to the surface of the base plate of the moving disc 110, thereby the axial sealing performance between the moving disc 110 and the static disc 210 is improved, the volumetric efficiency of the scroll compressor pump body is improved, and the performance of the compressor is improved.

When the base material hardness of the static disc 210 is less than that of the dynamic disc 110, and the hardness of the dynamic disc sealing strip 120 is less than that of the static disc sealing strip 220, the scroll compressor is in the operation process, the pressure of high-pressure gas at the high-pressure side in a compression cavity of a high-pressure area is P1, the high-pressure gas firstly passes through one side of the high-pressure side of the dynamic disc sealing strip 120 from a drainage port 213 and a gap between the dynamic disc 110 and the static disc 210 and then enters the bottom of the dynamic disc sealing groove 112, the high-pressure gas lifts up the soft dynamic disc sealing strip 120, so that the dynamic disc sealing strip 120 is tightly attached to the surface of the substrate of the static disc 210, the axial sealing performance between the dynamic disc 110 and the static disc 210 is improved, the volumetric efficiency of the scroll compressor pump body is improved, and the performance of the compressor is improved.

The utility model provides a scroll sealing device, drainage mouth 213 has been seted up on the lateral wall of stereoplasm substrate scroll board addendum seal groove high-pressure side, make to move, soft sealing strip in the last seal groove of quiet dish axial scroll board is lifted by high-pressure gas more easily, the condition that only part was lifted or was not lifted at all appears in the soft sealing strip of well pressure section and low pressure section is avoided, the unsteady discontinuous problem of delaying and floating of soft sealing strip has also been solved, axial sealing performance obtains guaranteeing between the scroll compressor pump body, scroll compressor's performance also obtains certain promotion.

According to an embodiment of the present application, a scroll compressor includes a scroll sealing device, which is the scroll sealing device described above.

According to an embodiment of the application, the refrigeration device comprises a scroll sealing device, which is the scroll sealing device described above.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims

1. The scroll plate sealing device is characterized by comprising a scroll plate, wherein the scroll plate comprises a movable disc (110) and a fixed disc (210), the hardness of base materials of the movable disc (110) and the fixed disc (210) is different, a movable disc scroll plate (111) tooth top of the movable disc (110) is provided with a movable disc sealing groove (112), a movable disc sealing strip (120) is arranged in the movable disc sealing groove (112), a fixed disc scroll plate (211) tooth top of the fixed disc (210) is provided with a fixed disc sealing groove (212), a fixed disc sealing strip (220) is arranged in the fixed disc sealing groove (212), and at least one of the movable disc sealing groove (112) and the fixed disc sealing groove (212) is provided with a drainage port (213) penetrating through the side wall on the side wall of the sealing groove on the side with higher pressure; a plurality of compression areas are formed between the movable disc (110) and the static disc (210), wherein the compression area communicated with the suction port is a low-pressure area, the compression area communicated with the exhaust port is a high-pressure area, the middle compression area is a medium-pressure area, the number of the drainage ports (213) of the high-pressure area is N1, the number of the drainage ports (213) of the medium-pressure area is N2, the number of the drainage ports (213) of the low-pressure area is N3, and N1 is more than N2 and more than N3.

2. The scroll seal of claim 1, wherein said flow conduction ports (213) are open at least at a center start of said seal groove.

3. A scroll sealing arrangement according to claim 1, wherein the drainage port (213) is open along a scroll profile of the scroll, the drainage port (213) satisfying the relationship between scroll pitch Pt, scroll thickness t, involute angle Φ i and profile rotation angle θ at different points (xi, yi) on the scroll profile:

4. a scroll sealing arrangement according to claim 3, wherein the scroll pitch Pt = 8-30 mm, the scroll thickness t = 3-8 mm, the involute angle phi i = 0-20 °, and the profile rotation angle θ = 0-3 °.

5. The scroll seal of claim 1, wherein N1=2N2, N2=2N3.

6. The scroll seal of claim 1, wherein the area Sa of said conduction opening (213) in the high pressure central portion is greatest and the areas of the other conduction openings (213) are equal.

7. The scroll seal of claim 1, wherein said drainage port (213) is located corresponding to a groove bottom of said seal groove.

8. The scroll seal of claim 1, wherein said flow conduction ports (213) are disposed in correspondence with the groove crests of said seal grooves.

9. The scroll seal of claim 8, wherein the height of the drainage port (213) is H, the depth of the seal groove is H, and H = (1/5-1/2) H.

10. The scroll seal of claim 1, wherein said flow-conduction ports (213) at high pressure regions are located corresponding to the groove bottom of said seal groove and said flow-conduction ports (213) at intermediate and low pressure regions are located corresponding to the groove top of said seal groove.

11. A scroll compressor including a scroll seal arrangement, wherein the scroll seal arrangement is as claimed in any one of claims 1 to 10.

12. A refrigeration apparatus including a scroll seal arrangement, wherein the scroll seal arrangement is as claimed in any one of claims 1 to 10.