CN205478293U - Scroll compressor having a plurality of scroll members - Google Patents

Abstract

The utility model provides a scroll compressor, include: a housing; a compression mechanism disposed within the housing, the compression mechanism adapted to compress a working fluid; a diaphragm disposed within the housing and adjacent to the compression mechanism, wherein a first pressure region and a second pressure region having different pressures are formed within the housing between the compression mechanism and the diaphragm; and a seal assembly disposed between the compression mechanism and the partition plate, wherein the seal assembly includes: a first seal member configured to seal with the diaphragm and the compressor body to separate the first pressure region from the second pressure region, the seal assembly further comprising a first bearing against which the first seal member is held against the compression mechanism, wherein the first seal member is provided with a first detent configured to mate with the first bearing.

Description

Screw compressor

Technical field

This utility model relates to a kind of screw compressor.

Background technology

The content of this part provide only the background information relevant to this utility model, and it may be not intended that existing skill Art.

In various type of compressor, screw compressor is increasingly commonly applied due to its extremely efficient ability to work In every field.Normally, screw compressor includes by the compression mechanism determining scroll element and dynamic scroll element is constituted, with shape The fluid compression becoming some compression chambers arranged thus will be assigned in each compression chamber.

In a series of compression chambers of screw compressor, including the low pressure being in pressure of inspiration(Pi) being positioned at outermost radial outside Chamber, exist at the high pressure chest being in pressure at expulsion of radially inner most and the cavity pressure between low pressure chamber and high pressure chest Middle pressure chamber between pressure of inspiration(Pi) and pressure at expulsion.Determine scroll element end plate be provided with recessed away from dynamic scroll element side Portion, this recess and dividing plate cooperatively form the chamber substantially closed, and this chamber is with middle pressure chamber fluid communication thus is formed as determining vortex Parts provide the back pressure cavity of back pressure.So, the top determining scroll element can be in three kinds of different pressure spans, i.e. determines whirlpool The periphery of rotation parts is in suction pressure region (that is, low-pressure side region), and the back pressure cavity determining scroll element is in medium voltage side region, and Determine the exhaust ports of scroll element in pressure at expulsion region (that is, region, high-pressure side).

During refrigerant compression, this medium voltage side region provide back pressure with will determine scroll element towards dynamic scroll element It is pressed against.But, when cannot form the i.e. existence leakage of sealing between the pressure span that these three is different, then can cause compressor The problems such as energy reduction, delivery temperature rising, noise increase.To this end, have employed sealing structure between these three pressure span.Mesh Before be used to separate the structure of this pressure span and mainly have two kinds: floating sealing structure and flat-top seal structure.The former passes through two The riveting of block metallic plate fixes interior exterior seal ring；The latter is the most inner, and outer two springs support interior exterior seal ring respectively.

But, in some cases, (such as ambient temperature is less than subzero 15 degree or lower) opens the most under cryogenic Time dynamic, seal structure particularly flat-top seal structure and be difficult to radial seal.This makes to yet suffer from sealing knot for improving Demand in terms of the sealing property of structure.

Utility model content

According to an aspect of the present utility model, it is provided that one can make in compression case body between different pressures region The significantly improved screw compressor of sealing property.

According to another aspect of the present utility model, it is provided that realize when one can make compressor start under cryogenic The screw compressor of the good radial seal between sealing structure and compression mechanism.

One side of the present utility model provides a kind of screw compressor, including: housing；It is arranged on the pressure in described housing Contracting mechanism, described compression mechanism is suitable to compression work fluid；Dividing plate, described dividing plate is arranged in described housing and is adjacent to described Compression mechanism is arranged, and wherein, is formed and have different pressures between described compression mechanism and the described dividing plate within described housing The first pressure span and the second pressure span；And black box, described black box is arranged on described compression mechanism and institute Stating between dividing plate, wherein, described black box includes: the first containment member, described first containment member be configured to described every Plate and described compressor are configured to seal, thus are separated with described second pressure span described first pressure span, described close Sealing assembly also includes the first supporting member, and described first supporting member is against described first containment member, so that described first seals structure Part remains held against in described compression mechanism,

Wherein, described first containment member is provided with the first location division, and described first location division is configured to and described first Supporting member coordinates.

Preferably, described compression mechanism includes dynamic scroll element and determines scroll element, described determines scroll element with described The side that dynamic scroll element is contrary is provided with recess, remaining at least partially within described recess of described first containment member.

Preferably, described first containment member is substantially annular, the radial seal cage structure of described first containment member Becoming the annular wall with the described described recess determining scroll element to form radial seal, described first location division is arranged on described radial direction On the inner circumferential surface of sealing, so that described first supporting member applies radially outer effect to described radial seal portion Power.

Preferably, described first containment member also include axial sealing part, described axial sealing part be configured to described every Plate forms axial seal.

Preferably, described first containment member has the cross section of generally L-shaped.

Preferably, the most described compression mechanism is in unloaded state or non-offloaded state, and described first supporting member is axially It is respectively positioned on direction in described recess.

Preferably, described black box also includes that the first elastic component, described first elastic component are arranged on described recess In, so that the described axial sealing part of described first containment member remains held against on described dividing plate.

Preferably, described supporting member is integrally formed with described first elastic component.

Preferably, described first location division is the form of groove, and wherein, the cross section of described groove is curved or rectangle.

Preferably, circular in cross-section, concave or the V-arrangement of described first supporting member.

Preferably, described first supporting member is annular element.

Preferably, described first supporting member is notched annular element, and at two ends of described notched annular element Gap it is formed with between portion.

Preferably, said two end at axial direction and does not the most all overlap with, or, said two week Or overlap each other in the radial direction at axial direction to end.

Preferably, between described compression mechanism and described dividing plate, it is also formed with the 3rd pressure span, and described sealing Assembly also includes: the second containment member, and described second containment member is configured to be configured to close with described dividing plate and described compressor Envelope, thus described second pressure span with different pressures in described housing is separated with described 3rd pressure span；With And second supporting member, described second supporting member is against described second containment member, so that described second containment member is kept pressed against In described compression mechanism.

Preferably, described second containment member is provided with the second location division, and described second location division is configured to and described Two supporting members coordinate.

Preferably, described first containment member is positioned at the radial outside of described second containment member, described first pressure area Territory corresponds to and described dynamic scroll element and institute corresponding to the low-pressure side region connected with admission pressure, described second pressure span State the medium voltage side region that the middle pressure chamber in a series of compression chambers determining to be formed between scroll element connects, described 3rd pressure span Corresponding to the region, high-pressure side connected with pressure at expulsion, or, described second containment member is positioned at described first containment member Radial outside, described first pressure span is corresponding to the region, high-pressure side connected with pressure at expulsion, described second pressure span pair In dynamic scroll element described in Ying Yuyu and the middle pressure chamber connection in the described a series of compression chambers determining to be formed between scroll element Pressure side region, described 3rd pressure span is corresponding to the low-pressure side region connected with admission pressure.

By explanation provided herein, other application will be apparent from.It should be understood that the spy described in this part Determine example and embodiment is for illustration purposes only rather than attempts to limit scope of the present utility model.

Accompanying drawing explanation

Accompanying drawing as described herein is only in order at illustration purpose and is not intended to limit by any way of the present utility model Scope, accompanying drawing is not necessarily drawn to scale, and can zoom in or out some features to show the details of particular elements.In the accompanying drawings:

Fig. 1 is the longitudinal section of conventional screw compressor；

Fig. 2 is the exploded perspective view of the sealing structure of the conventional screw compressor shown in Fig. 1；

Fig. 3 is the longitudinal section of the sealing structure of the conventional screw compressor shown in Fig. 2；

Fig. 4 A is that the sealing structure of the conventional screw compressor shown in Fig. 2 is in the vertical profile of normal sealing state and regards Figure, wherein, dividing plate is hidden；

Fig. 4 B is that the sealing structure of the conventional screw compressor shown in Fig. 2 is in the vertical profile of improper sealing state and regards Figure, wherein, dividing plate is hidden；

Fig. 5 is the longitudinal section of the sealing structure of the screw compressor according to embodiment of the present utility model；

Fig. 6 A is the longitudinal section of the containment member of conventional screw compressor；

Fig. 6 B is the longitudinal section of the containment member according to embodiment of the present utility model；

Fig. 6 C is the longitudinal section of the containment member according to another embodiment of the present utility model；

Fig. 7 A is the longitudinal section of the black box according to embodiment of the present utility model；

Fig. 7 B is the longitudinal section of the black box according to another embodiment of the present utility model；

Fig. 7 C is the longitudinal section of the black box according to another embodiment of the present utility model；

Fig. 8 A and 8B is axonometric chart and the top view of the supporting member according to embodiment of the present utility model respectively；

Fig. 8 C and 8D is axonometric chart and the side view of the supporting member according to another embodiment of the present utility model respectively；

Fig. 8 E and 8F is axonometric chart and the side view of the supporting member according to another embodiment of the present utility model respectively；

Fig. 9 A is the longitudinal section of the sealing structure of the screw compressor according to another embodiment of the present utility model；

Fig. 9 B is the partial enlarged view of the sealing structure in the dotted line circle shown in Fig. 9 A；And

Fig. 9 C is the axonometric chart that the supporting member of the black box of the sealing structure shown in Fig. 9 A is combined with elastic component.

Detailed description of the invention

Following description be the most only exemplary and be not intended to limit this utility model.Should be appreciated that all In these accompanying drawings, the instruction of corresponding reference number is similar or corresponding part and feature.For purposes of clarity, not to accompanying drawing In all parts be marked.

Run through all accompanying drawings, it should be pointed out that in literary composition, the reference of the directional terminology such as such as front, back, left, right, up, down is only For purposes of illustration, embodiment of the present utility model direction in actual applications and orientation are not construed as limiting.

It is pointed out that in literary composition and be also regarded as being right to some conventional structures of existing compressor and the description of parts The corresponding construction of the compressor of embodiment of the present utility model and the description of parts.

First total structure and the operation logic of screw compressor will be described with reference to Fig. 1.As it is shown in figure 1, screw compressor 100 (hereinafter also referred to as compressors) generally comprise housing 110.Housing 110 can include general cylindrical shape body 111, It is arranged on the top cover 112 of body 111 one end (upside in FIG) and is arranged on body 111 other end (downside in Fig. 1) Bottom 114.Compressor 100 includes the compression mechanism being arranged in housing 110, this compression mechanism compression work fluid and can To include that (being positioned at upside in FIG) determines scroll element 150 and (being positioned at downside in FIG) dynamic scroll element 160.Compression Machine 100 also include dividing plate 116, dividing plate 116 be arranged on housing 110 in and be adjacent to determine scroll element 150 and arrange, such as, every Plate 116 is arranged between top cover 112 and body 111.It is provided with for sucking stream in the side (downside in Fig. 1) of dividing plate 116 The inlet suction port (not shown) of body (also referred to as working fluid) such as gaseous refrigerant, in opposite side (upper in Fig. 1 of dividing plate Side) it is provided with the exhaust joint 119 of the fluid after discharging compression.Housing 110 is additionally provided with by stator 122 and rotor 124 motors 120 constituted.Rotor 124 is provided with drive shaft 130 and moves scroll element 160 to drive, thus scroll portion is determined in compression Working fluid between part 150 and dynamic scroll element 160.Dynamic scroll element 160 includes end plate 164, is formed at end plate 164 side The hub portion 162 of (downside in Fig. 1) and be formed at the spiral helicine blade 166 of end plate 164 opposite side (upside in Fig. 1). Determine scroll element 150 include end plate 154, the spiral helicine blade 156 being formed at end plate 154 side (downside in Fig. 1) and It is formed at the recess (outer recess 158) of end plate 154 opposite side (upside in Fig. 1).Substantial middle position at end plate 154 Place is formed with air vent 152.Region, composition high-pressure side, space around air vent 152.Determining the blade 156 of scroll element 150 And form, between the blade 166 of dynamic scroll element 160, the compression that a series of volume is gradually reduced to radially inner side from radial outside Chamber, such as compression chamber C1, C2 and C3, wherein, the compression chamber C1 of outermost radial outside is the low pressure chamber being in pressure of inspiration(Pi), radially inner most The compression chamber C3 of side is the high pressure chest being in pressure at expulsion.Middle compression chamber C2 is between pressure of inspiration(Pi) and pressure at expulsion, Thus pressure chamber in also referred to as.

The side (downside in Fig. 1) of dynamic scroll element 160 is by the upper support of main bearing seat, one end of drive shaft 130 (in FIG for upper end) is supported by the base bearing being arranged in main bearing seat.Described one end of drive shaft 130 is provided with eccentric bent Handle pin, is provided with unloading lining between the hub portion 162 of eccentric crank pin and dynamic scroll element 160.By driving of motor 120 Dynamic, dynamic scroll element 160 (that is, will move the central axis of scroll element 160 around fixed relative to determining scroll element 150 translation rotation The central axis motion of scroll element 150, but dynamic scroll element 160 itself will not rotate around the central axis of self) with reality The compression of existing fluid.Fluid after determining scroll element 150 and dynamic scroll element 160 compression is discharged to by air vent 152 Region, high-pressure side.

In order to realize the compression of fluid, the remote of scroll element (is also referred to as determined in the top of the blade 156 determining scroll element 150 End) and the end plate 164 of dynamic scroll element 160 between and (the also referred to as start whirlpool, top of blade 166 of dynamic scroll element 160 The distal portion of rotation parts) and determine to need axial seal between the end plate 154 of scroll element 150.This just needs at dividing plate 116 with fixed Effectively seal to be reliably formed back pressure cavity between scroll element 150 to realize.To this end, generally determining scroll element 150 And sealing structure S is set between dividing plate 116.Seal structure S in addition to being floating sealing structure, it is also possible to be flat-top seal knot Structure.Herein below is carried out for flat-top seal structure.

Sealing structure S of compressor is described in detail presently in connection with Fig. 2 and Fig. 3.As in figure 2 it is shown, seal structure S be arranged on every Plate 116 and determining between scroll element 150.Seal structure S can include containment member with determine scroll element 150 and dividing plate 116 Formed and seal, thus the pressure span differed present in compressor is spaced apart.

Specifically, as it is shown on figure 3, seal structure S can include outer seal member S1 of such as exterior seal ring and such as interior The interior containment member S2 of sealing ring.When sealing structure S and being arranged in screw compressor 100, at the top determining scroll element 150 From define three different pressure spans between the bottom of dividing plate 116: low-pressure side region LA, medium voltage side region MA and high-pressure side Region HA, wherein, is constituted low-pressure side region LA by the housing 110 below dividing plate 116 and the space formed between compression mechanism, By the space structure formed between air vent 152 and the dividing plate 116 of the fluid after compression at the top determining scroll element 150 Become region, high-pressure side HA, and by the space formed between outer recess 158 and the dividing plate 116 on the top determining scroll element 150 Constitute medium voltage side region MA.In other words, outer seal member S1 defines the sealing between low-pressure side region and medium voltage side region, interior Containment member S2 defines the sealing between medium voltage side region and region, high-pressure side.

It will be appreciated by persons skilled in the art that the purpose providing medium voltage side region MA is in order to determining scroll portion Part 150 provides back pressure.Owing to the side (downside) of dynamic scroll element 160 is supported by main bearing seat, so utilizing medium voltage side region Downforce in MA can will determine scroll element 150 and dynamic scroll element 160 forces together effectively, and this state can be referred to as The non-offloaded state of compression mechanism.When the pressure in each compression chamber exceedes setting value, the pressure in these compression chambers is produced Raw will exceed the downforce provided in the MA of medium voltage side region with joint efforts so that determine scroll element 150 and move upward.Now, pressure Fluid in contracting chamber is by between top and the end plate 164 of dynamic scroll element 160 of the blade 156 by determining scroll element 150 Clearance leakage between top and the end plate 154 determining scroll element 150 of the blade 166 of gap and dynamic scroll element 160 arrives Low-pressure side region is to realize unloading.This provides axial elasticity (also referred to as POP OFF) for screw compressor, and this state is also referred to as Make the unloaded state of compression mechanism.

Hypotony in the MA of medium voltage side region can make to determine scroll element 150 and be in unloaded state for a long time, it is impossible to real Now be effectively compressed, the hypertonia in medium voltage side region then can make the pressure in each compression chamber when exceeding setting value without Method unloads, and easily causes the damage of compression mechanism.Therefore, the pressure in the MA of medium voltage side region stable be accurately to ensure that compressor The key factor of normal work.This just requires that medium voltage side region MA is formed the closeest relative to low-pressure side region and region, high-pressure side Envelope.In other words, this requires to seal structure S i.e. outer seal member S1 and interior containment member S2 realizes medium voltage side region MA and low-pressure side Effective sealing between region LA and region, high-pressure side HA.

The concrete seal form sealing structure S is described below with reference to Fig. 3.As it is shown on figure 3, outer seal member S1 and dividing plate 116 form axial seal；Outer seal member S1 with determine scroll element 150 and form radial seal；Interior containment member S2 and dividing plate 116 Form axial seal；And interior containment member S2 with determine scroll element 150 and form radial seal.Above-mentioned sealing everywhere is collectively forming The sealing of medium voltage side region MA.

Specifically, the upside determining scroll element 150 is formed with two recesses, outer recess 158 and inner fovea part 153.Outer recess 158 radial outsides being positioned at inner fovea part 152 and air vent 152 are positioned at the radially inner side of inner fovea part 152.Outer seal member S1 is substantially Being positioned at outer recess 158, interior containment member S2 is located substantially in inner fovea part 153.

Although hereinafter embodiment of the present utility model being described referring especially to outer seal member S1, but can manage Solving, the description and the improvement that are applied to outer seal member S1 can be applied equally to interior containment member S2.

Specifically, outer seal member S1 is roughly annular the form of sealing member (sealing ring).With reference to Fig. 4 A, outer seal member S1 includes radial seal portion S1R and axial sealing part S1A.The axial sealing part S1A of outer seal member S1 is configured to and dividing plate 116 The radial seal portion S1R forming axial seal and outer seal member S1 is configured to and the outer recess 158 determining scroll element 150 Annular wall 157 forms radial seal.Preferably, the circumferential cross-section of outer seal member S1 is substantially L-shaped, radial seal portion S1R with Axial sealing part S1A combines in a respective end or forms one.As shown in Figure 4 A, radial seal portion S1R is substantially In axial direction extending, axial sealing part S1A substantially radially direction extends.Certainly, outer seal member S1 can also have it His suitable structure.

With reference to Fig. 3 and Fig. 4 A, being also provided with outer elastic component S3 such as outer spring in the MA of medium voltage side region, this is outer One end of spring S3 is against determining the upper surface (bottom of outer recess 158) of scroll element 150, and its other end is against outer close The axial sealing part S1A (the particularly lower surface of axial sealing part S1A) of envelope component S1, at the outer spring S3 moment after mounting In compressive state, therefore outer spring S3 makes axial sealing part S1A (the particularly upper surface of sealing S1A) be held against dividing plate On 116, to realize the pre-axial seal of outer seal member S1 and dividing plate 116.After compressor start, medium voltage side region MA with Pressure differential between the LA of low-pressure side region provides axial force to axial sealing part S1A, so that axial sealing part S1R and dividing plate 116 Form axial seal.In other words, this axis sealing is provided jointly by outer elastic component S3 and described pressure differential.

In the ordinary course of things, when compressor is not actuated, the radial seal portion S1R of outer seal member S1 is against determining scroll portion The annular wall 157 of the outer recess 158 of part 150 is to realize pre-radial seal, after compressor start, and medium voltage side region MA and low pressure Pressure differential between side region LA provides radial force to radial seal portion S1R so that radial seal portion S1R and annular wall 157 it Between formed radial seal.In other words, this radial sealing force is only provided by interference fit when described pressure differential and possible assembling. This require when compressor is not actuated, the radial seal portion S1R of outer seal member S1 can against or at least sufficiently close to outer recessed The annular wall 157 in portion 158 so that when compressor start, it is possible to do not produce between medium voltage side region MA and low-pressure side region LA Raw severe leakage, and then set up pressure differential between medium voltage side region MA and low-pressure side region LA.

But, owing to the startup ambient temperature of compressor is relatively low or the reason (will be explained below) such as manufacture/build-up tolerance, Gap may be there is so that medium voltage side region MA between outer seal member S1 (or its radial seal portion S1R) and annular wall 157 In fluid by this clearance leakage to low-pressure side region LA, and then can not be between medium voltage side region MA and low-pressure side region LA Form pressure differential, to such an extent as to above-mentioned radial seal can not be formed between medium voltage side region MA and low-pressure side region LA.

Such as, contrast is with reference to Fig. 4 A and Fig. 4 B, between the annular wall 157 of outer seal member S1 and outer recess 158 sometimes Gap K (Fig. 4 B) occurs.Although not intending to limit in principle, but still it is noted that for the ease of assembling or manufacture The reasons such as precision, the external diameter of outer seal member S1 may be manufactured into the internal diameter of slightly smaller than annular wall 157.Additionally, due to it is outer close Component S1 is different with the thermal coefficient of expansion of annular wall 157 for envelope, it is difficult to ensure that particularly startup under low temperature under any ambient temperature During compressor, can make there is not gap between outer seal member S1 and first annular wall 157 or exist negligible Gap.Especially, under cryogenic, the radial contraction amount of outer seal member S1 is likely larger than the radial direction receipts of annular wall 157 Contracting amount so that radial clearance occurs therebetween.This makes when compressor start, medium voltage side region MA and low-pressure side region LA Between cannot form sealing, and then pressure differential cannot be set up, even make compressor failure.

To this end, in an embodiment of the present utility model, provide supporting member T, this supporting member T for outer seal member S1 Make outer seal member S1 such as radial seal portion S1R remain to be pressed against in compression mechanism such as annular wall 157, eliminating or At least alleviate the problems referred to above.

Specifically, it is arranged on the radially inner side of the radial seal portion S1R of outer seal member S1 with reference to Fig. 5, this supporting member T, And be radially oriented the inner circumferential surface against the radial seal portion S1R of outer seal member S1, the outside, so that radial seal portion S1R It is held against on first annular wall 157, thus contributes to realizing radial seal.

Especially, the material manufacturing this supporting member T can have less thermal coefficient of expansion, and this thermal coefficient of expansion is the least In manufacturing the thermal coefficient of expansion of material of outer seal member S1, it is more preferably, less than and (such as determines vortex equal to manufacturing compression mechanism Parts) the thermal coefficient of expansion of material so that when ambient temperature is relatively low, supporting member T can produce less radial contraction amount (e.g., less than containment member radial contraction amount or compression mechanism radial contraction amount), thus by radial seal portion S1R keep It is resisted against in compression mechanism such as annular wall 157.

It addition, this supporting member T can have elasticity, (this will in detail below to be such as configured to the form of C-shaped elastic component Describe) such that it is able to radially outward open, so that radial seal portion S1R is held against in annular wall 157.

Preferably, the inner circumferential surface of the radial seal portion S1R of outer seal member S1 is provided with for supporting member T Carry out the location division W positioned.In a preferred embodiment, supporting member T cooperates with location division W.Such as, this location division W in The form of annular groove opened wide towards radially inner side, and can being contained at least partially in this annular groove of supporting member T.? In other embodiments, this location division can the form of flange radially to protrude inwardly from, and supporting member T is in radial outside shape Become to have the groove for matching with described flange.

In a preferred embodiment, location division W is general toroidal (O shape).The circumferential cross-section shape of location division W is (i.e. along week The cross sectional shape observed to direction) can cooperate with the shape of cross section of supporting member T such as can be complementary, thus prevent In actual application, location division W is disconnected from each other with supporting member T.

In a preferred embodiment, as shown in Figure 6B, the cross section in the circumferentially direction of the location division W of groove is (simple ringwise It is referred to as circumferential cross-section) can be curved.In another preferred embodiment, as shown in Figure 6 C, the location division W of groove ringwise Circumferentially the cross section in direction can be rectangular.Certainly, in other preferred implementations, the circumferential cross-section of location division W can be in Other suitable shapes.

In a preferred embodiment, as shown in Figure 7 A, the circumferential cross-section of supporting member T can be rounded such that it is able to shape The mode of shape complementation is coupled in curved annular groove (location division) W of circumferential cross-section as depicted in figure 6b.

In another preferred embodiment, as shown in Figure 7 B, the circumferential cross-section of supporting member T can in concave, thus Can be coupled in the way of shape complementarity in annular groove (location division) W that circumferential cross-section as shown in figure 6c is rectangular.

Certainly, supporting member T and location division W also is able in the way of non-shape complementarity be fitted to each other.As seen in figure 7 c, supporting The circumferential cross-section of part T in generally V-shaped, thus can be coupled to circumferential cross-section as shown in figure 6c in the way of non-shape complementarity In rectangular annular groove W.

In other embodiments, supporting member and location division can also correspondingly have other cross sectional shapes, thus will prop up On the inner circumferential surface in the radial seal portion that bearing member is fixed to containment member.

Although being hereinbefore described the supporting member T of part form ringwise, but supporting member T can also have other deformation. Such as, supporting member T with the form of C-shaped part, and can have gap between two circumferential end of this supporting member T.

Specifically, with reference to Fig. 8 A and Fig. 8 B, the end face of two circumferential end of the supporting member T of this C-shaped part form is in flat Face form, and the most spaced apart segment distance.In the case of the material constituting supporting member T has elasticity, this gap The diameter allowing this supporting member T changes.On the one hand, this diameter changes and can reduce the demand to height manufacture/assembly precision, separately On the one hand, this diameter changes can provide adjustable radial force to outer seal member.

Similarly, two circumferential end with reference to Fig. 8 C and Fig. 8 D, this supporting member T weigh each other when radially observing A folded and spaced apart segment distance.

Similarly, two circumferential end with reference to Fig. 8 E and Fig. 8 F, this supporting member T weigh each other when in axial direction observing A folded and spaced apart segment distance.This makes supporting member T can provide supporting to outer seal member throughout the circumferential, thus enters one Step improves this outer seal member and the radial seal determined between scroll element.

In other embodiments, for the ease of assembling or the location of supporting member T, this supporting member T can be with outer elastic structure Part is combined into one.

As shown in Fig. 9 A, 9B and Fig. 9 C, in outer elastic component S3 is arranged on outer recess 158 and have for upwards pushing Outer seal member S1 is to realize the axial push arm S3A of the axial seal between outer seal member S1 and dividing plate 116, and supporting member T can To be connected to this axial push arm S3A.Preferably, supporting member T can be integrally formed with outer elastic component S3.At other embodiments In, supporting member T can also be connected with other parts of outer elastic component S3.

It is to be herein pointed out in a preferred embodiment, the most whether pipe support T does not has elasticity And not pipe support T ringwise or C-shaped, can realize the supporting member T moment from design aspect provides radially to containment member Outside active force.Specifically, the size of supporting member such as external diameter can be designed to slightly larger than containment member (radial seal portion) Internal diameter.In other words, when design and manufacture so that the gap between assembling rear carrier and the annular wall of recess is the closeest The thickness in the radial seal portion of envelope component, thus realize the interference fit between supporting member, containment member and annular wall.

In other preferred implementations, when compressing mechanism and being in unloaded state, supporting member T can be positioned at and determine vortex structure In the outer recess 158 of part 150, even when compressing mechanism and being in non-offloaded state, supporting member T still is able to be positioned at and determines scroll element In the outer recess 158 of 150, thus prevent supporting member T from outer seal member S1 is released outer recess 158.

Preferably, supporting member T may be located at outer seal member S1 radial seal portion S1R the most substantially Centre.

As it has been described above, supporting member T constitutes according to reality of the present utility model with outer seal member S1 being provided with location division W Execute the black box of mode.But, in other embodiments of the present utility model, seal structure S and can also include interior sealing Component S2 and another supporting member T ', this interior containment member S2 can also be provided with the location division W ' similar to location division W, and this is another One supporting member T ' can be configured to coordinate with location division W ', so that interior containment member S2 remains held against in compression mechanism.Therefore, It is close that supporting member T ' and the interior containment member S2 being provided with location division W ' constitutes according to another embodiment of the present utility model Sealing assembly.

Specifically, the interior containment member S3 of sealing structure S of screw compressor can be the most such as interior Sealing ring, the axial sealing part S3A of interior containment member S3 is configured to against dividing plate 116 to realize axial seal, inner seal ring S3 Radial seal portion S3R be configured to against compression mechanism, the most such as can be against determining in scroll element 150 The inner circumferential surface of the annular wall 159 of recess 152 is to realize radial seal, thus by region, the high-pressure side HA in screw compressor Separate with medium voltage side region MA.Seal structure S and can also include that the second elastic component S4, the second elastic component S4 are arranged on and determine whirlpool In second recess 152 of rotation parts 150, remain held against on dividing plate 116 with the axial sealing part S3A by interior containment member S3.

Although it is new to describe this practicality to it will be apparent to a skilled person that text has been directed towards outer seal member S1 The black box of the embodiment of type, but, being described with improve can be with identical side for outer seal member S1 Formula is applied to interior containment member S2.

Furthermore it is possible to by black box of the present utility model and a kind of black box of the prior art or sealing structure example Existing sealing structure as previously described is used in combination.These schemes present embodiment being used in combination with prior art are same Sample is obtained in that and is used alone the advantage that black box of the present utility model is capable of.

Although described various embodiment of the present utility model in detail at this, it should be appreciated that, this utility model It is not limited to the detailed description of the invention describing in detail here and illustrating, without departing from connotation of the present utility model and scope In the case of may be effected by one skilled in the art other modification and remodeling.All these modification and remodeling each fall within this reality With in novel scope.

Reference numerals list

100 screw compressors

110 housings

111 bodies

112 top covers

114 bottoms

150 determine scroll element

152 air vents

153 inner fovea parts

154 end plates

156 blades

158 outer recesses

160 move scroll element

162 hub portions

164 end plates

166 blades

116 dividing plates

119 exhaust joints

120 motors

122 stators

124 rotors

130 drive shafts

C1 low pressure chamber

C2 presses chamber

C3 high pressure chest

S seals structure

S1 outer seal member

S1R radial seal portion

S1A axial sealing part

Containment member in S2

S2R radial seal portion

S2A axial sealing part

S3 the first elastic component

S4 the second elastic component

LA low-pressure side region

MA medium voltage side region

Region, HA high-pressure side

Claims (16)

1. a screw compressor, including:

Housing；

The compression mechanism being arranged in described housing, described compression mechanism is suitable to compression work fluid；

Dividing plate, described dividing plate is arranged in described housing and is adjacent to described compression mechanism and arranges, wherein, within described housing Described compression mechanism and described dividing plate between formed there is the first pressure span and second pressure span of different pressures；And

Black box, described black box is arranged between described compression mechanism and described dividing plate, wherein, described black box bag Include:

First containment member, described first containment member is configured to be configured to seal with described dividing plate and described compressor, thus Described first pressure span is separated with described second pressure span,

It is characterized in that, described black box also includes the first supporting member, and described first supporting member seals structure against described first Part, so that described first containment member remains held against in described compression mechanism,

Wherein, described first containment member is provided with the first location division, and described first location division is configured to and described first supporting Part coordinates.

Screw compressor the most according to claim 1, wherein, described compression mechanism includes dynamic scroll element and determines scroll portion Part, described determine scroll element the side contrary with described dynamic scroll element is provided with recess, and described first containment member is extremely A few part is positioned at described recess.

Screw compressor the most according to claim 2, wherein, described first containment member is substantially annular, described The radial seal cage structure of one containment member becomes the annular wall with the described described recess determining scroll element to form radial seal, institute State the first location division to be arranged on the inner circumferential surface in described radial seal portion, so that described first supporting member is to described radial direction Sealing applies radially outer active force.

Screw compressor the most according to claim 3, wherein, described first containment member also includes axial sealing part, institute State axial sealing part to be configured to form axial seal with described dividing plate.

Screw compressor the most according to claim 4, wherein, described first containment member has the cross section of generally L-shaped.

Screw compressor the most according to claim 2, wherein, the most described compression mechanism is in unloaded state or non-offloaded State, described first supporting member is respectively positioned in described recess in the axial direction.

Screw compressor the most according to claim 4, wherein, described black box also includes the first elastic component, described First elastic component is arranged in described recess, so that the described axial sealing part of described first containment member remains held against institute State on dividing plate.

Screw compressor the most according to claim 7, wherein, described supporting member and described first elastic component one bodily form Become.

Screw compressor the most according to claim 1, wherein, described first supporting member is annular element.

Screw compressor the most according to claim 9, wherein, described first supporting member is notched annular element, and It is formed with gap between two ends of described notched annular element.

11. screw compressors according to claim 10, wherein, said two end is at axial direction and in the radial direction All do not overlap with, or, said two circumferential end at axial direction or overlaps each other in the radial direction.

12. according to the screw compressor described in any one in claim 1 to 11, wherein, and described first supporting member transversal Face is rounded, concave or V-arrangement.

13. according to the screw compressor described in any one in claim 1 to 11, and wherein, described first location division is groove Form, wherein, the cross section of described groove is curved or rectangle.

14. according to the screw compressor described in any one in claim 1 to 11, wherein, in described compression mechanism with described The 3rd pressure span it is also formed with between dividing plate, and

Described black box also includes:

Second containment member, described second containment member is configured to be configured to seal with described dividing plate and described compressor, thus Described second pressure span with different pressures in described housing is separated with described 3rd pressure span；And

Second supporting member, described second supporting member is against described second containment member, so that described second containment member keeps pressure Lean against in described compression mechanism.

15. screw compressors according to claim 14, wherein, described second containment member is provided with the second location division, Described second location division is configured to coordinate with described second supporting member.

16. screw compressors according to claim 15, wherein,

Described first containment member is positioned at the radial outside of described second containment member, and described first pressure span corresponds to and enters The low-pressure side region of atmospheric pressure connection, described second pressure span corresponding to described dynamic scroll element and described determine scroll element Between formed a series of compression chambers in middle pressure chamber connection medium voltage side region, described 3rd pressure span corresponding to and aerofluxus The region, high-pressure side of pressure communication, or

Described second containment member is positioned at the radial outside of described first containment member, and described first pressure span corresponds to and row The region, high-pressure side of atmospheric pressure connection, described second pressure span corresponding to described dynamic scroll element and described determine scroll element Between formed a series of compression chambers in middle pressure chamber connection medium voltage side region, described 3rd pressure span corresponding to and air inlet The low-pressure side region of pressure communication.