CN102384084A - Scroll compressor - Google Patents
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- CN102384084A CN102384084A CN2011102409870A CN201110240987A CN102384084A CN 102384084 A CN102384084 A CN 102384084A CN 2011102409870 A CN2011102409870 A CN 2011102409870A CN 201110240987 A CN201110240987 A CN 201110240987A CN 102384084 A CN102384084 A CN 102384084A
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- runner plate
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- roll bending
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Abstract
The invention provides a scroll compressor. As the operation pressure condition becomes wide, an axial gap between a cyclotron scroll pan member and a fixed scroll pan member is enlarged, resulting in a problem of performance degradation. A space is arranged inside a runner plate of the cyclotron scroll pan member, and the change in the deformation of the cyclotron runner plate under the wide pressure conditions can be prohibited by guiding in the pressure which becomes the middle pressure between the suction pressure and the back pressure, thereby improving the performance of the scroll compressor under wide conditions.
Description
Technical field
The present invention relates to a kind of scroll compressor, relate in particular under extensive operating condition through reducing the scroll compressor that leakage loss realizes high efficiency.
Background technique
Scroll compressor is popularized as being asked to the compressor for refrigerating circulation of energy-conservation air-conditioning and heat pump water heater.Because air-conditioning and the running in the whole year of heat pump water heater are so for the scroll compressor that carries above that, require it under wide operating condition, to have high-performance.
Scroll compressor is through making two whirlpool dish member engagement formation pressing chambers on runner plate, erectting the roll bending of being arranged to scroll, and the opposing party carries out the volume-variation that circumnutation makes pressing chamber through a side is fixed.In order to realize high efficiency, needing the main sealed department with this pressing chamber is that axial clearance keeps narrow and smallly.Axial clearance is meant that a side roll bending tooth top and the opposing party's roll bending tooth root are the gap of runner plate.
As the method that realizes this scroll compressor, the back side that employing is coiled member to the whirlpool of circling round of circumnutation applies ejection pressure or middle pressure, member reduces method from the gap to the fixed eddy plate member application of force is coiled in the whirlpool to circling round.Thisly for example in patent documentation 1, obtain open to the scroll compressor of the fixed eddy plate member application of force to the whirlpool dish member that circles round.
And each whirlpool dish member reduces axial clearance because of distortion.Such shown in Fig. 2 (fixed eddy plate member) of patent documentation 1 and Fig. 5 (whirlpool dish member circles round), the deformation pattern that the pressure of each whirlpool dish member produces is the distortion that axial clearance becomes narrow.Therefore, as patent documentation 1 shown in Figure 10, set the primary clearance of amplifying along with towards runner plate central authorities.
[patent documentation 1] japanese kokai publication hei 7-19187 communique
In above-mentioned existing technology; When preestablishing axial clearance, though narrow and smallization of axial clearance can make real work down as the operating condition of object the time; Under operating condition in addition, there is the problem of axial clearance expansion, internal leakage increase, inefficiency.Especially, consider, do not hope near having the central authorities of high pressure, to make gap enlargement from the leakage rate aspect.Need to prove that the axial clearance that set this moment is called axial setting gap.
Summary of the invention
The object of the present invention is to provide the high scroll compressor of efficient.
The purpose of the invention described above realizes as follows; Its pressure through back pressure chamber coils member to the fixed eddy plate member application of force to the whirlpool of circling round; And member is coiled in the said whirlpool of circling round and said fixed eddy plate member meshes and the formation pressing chamber; Working fluid is compressed, and said scroll compressor is characterised in that
In said set inside of circling round whirlpool dish member space in the runner plate is arranged,
The said whirlpool dish member that circles round disposes the access that is communicated with space in said pressing chamber and the said runner plate, with the pressure higher and lower than the pressure of said back pressure chamber than suction pressure of space behavior in said runner plate
[invention effect]
According to the present invention, high efficiency scroll compressor can be provided.
Description of drawings
Fig. 1 is the longitudinal sectional view of scroll compressor.
Fig. 2 is the longitudinal sectional view of fixed eddy plate member.
Fig. 3 whirlpool dish member of representing to circle round.
Fig. 4 is the worm's eye view of fixed eddy plate member.
Fig. 5 is the amplification longitudinal sectional view (Fig. 1 Q portion) of back pressure control valve.
Fig. 6 is two roll bending transverse cross-sectional view of the tooth flank that circles round of the pressure distribution between explanation two roll bendings.
Fig. 7 is the circle round face upwarding stereogram of whirlpool dish member and the stereogram of European ring.
Fig. 8 is the circle round concise and to the point longitudinal sectional view of the whirlpool dish member that circles round of distortion of runner plate of explanation.
Fig. 9 is the longitudinal profile enlarged view (Fig. 3 (a) S portion) of all sides in the runner plate of the back side.
Figure 10 is the longitudinal profile enlarged view of runner plate edge portion and the face upwarding stereogram of the whirlpool dish member that circles round.
Figure 11 representes active force, is pulled away from power, the relation of adsorption force.
[symbol description]
2 fixed eddy plate members
2a is runner plate fixedly
2a ' platen
The 2c fixed datum
2a10 is tooth flank fixedly
2b is roll bending fixedly
2b10 fixing tooth end face
The 3 whirlpool dish members that circle round
The 3a runner plate that circles round
3a1 roll bending runner plate
3a2 back side runner plate
The 3a10 tooth flank that circles round
The 3b roll bending that circles round
The 3b10 Topland that circles round
The 3c force surface that circles round
The 3d back side of circling round
The 3e edge portion of circling round
3ae outside back side portion
The 3p bearing support that circles round
The 3x European projection of circling round
4 frameworks
5 European rings
6 running shafts
22 bypass valve
23 bearings that circle round
26 back pressure control valves
60 back pressure access
100 pressing chambers
105 suction chambers
110 back pressure chambers
Fixing chambers, the back side 115
120 bearing chambers that circle round
150 back spraying outgoing nip territories
155 back pressures zone
Space in 200 runner plates
Space sealing spare in the 200a runner plate
Spatial communication road in the 200b runner plate
200c open communication portion
Embodiment
Below, use description of drawings mode of execution of the present invention.The identical symbolic representation phase jljl of the accompanying drawing of each mode of execution or suitable thing, each mode of execution comprises the situation of carrying out appropriate combination as required and further having effect.
(mode of execution 1)
According to Fig. 1 to Fig. 9 first mode of execution of the present invention is described.Need to prove that said mode of execution is that the compressor diameter is the situation about 10mm to 1000mm.In addition, shown in Figure 11 the active force, the relation that is pulled away from power, adsorption force that will describe.
As shown in Figure 1, the said circumnutation of the whirlpool dish member 3 that circles round through with fixed configurations the bearing 23 that circles round on the whirlpool dish member 3 that circles round be installed to running shaft 6 upper ends eccentric shaft hub 6a, and utilize after the motor 7 stated its running shaft 6 revolutions are realized.At this, through being arranged on the European ring 5 that circles round between whirlpool dish member 3 and the static framework 4 prevent the to circle round rotation of whirlpool dish member 3.
Running shaft 6 is by being wholely set the main bearing 24 on framework 4 and being arranged on supplementary bearing 25 supportings of the opposition side of main bearing 24 across rotor 7a.Axially be meant the axis direction of this running shaft 6.After the roll bending stated erect the direction that is provided with also for axially.At this, be the central authorities that the vertical hole 6b of fuel feeding connects running shaft 6 to the stream of the oil of each bearing fuel feeding.Dispose counterweight 7c and following counterweight 7d in the upper and lower of rotor 7a, whirlpool dish member 3 is unbalance thereby balance is circled round.
Be welded with bottom shell body 8c in the installation of the bottom of circular cylindrical shell 8a.In addition, be welded with upper shell 8b in the installation of the top of circular cylindrical shell 8a.As stated, through welding upper shell 8b above the circular cylindrical shell 8a, below welding bottom shell body 8c, thereby constitute airtight housing 8.
Predetermined fixed disposes liner plate (Ha one メ) terminal 85 on upper shell 8b, and motor line 7e is connected with the inboard of liner plate terminal 85.In addition, also predetermined fixed disposes housing pipe 50a, and suction pipe 50 is fixed on the upper shell 8b after through housing pipe 50a.Pass through sealed with brazing between suction pipe 50 and the housing pipe 50a.
Though do not show clearly, in the suitable moment of above-mentioned assembling, oil sealing is gone in the housing 8, form oil storage portion 125 in the bottom of housing 8.
In Fig. 2; With fixing runner plate 2a with erect the fixedly roll bending 2b that is provided with on it be the fixed eddy plate member 2 of main composition part in the edge portion of the fixed datum 2c of platen 2a ' such fixed configurations as shown in Figure 1 on framework 4, the fixed datum 2c of platen 2a ' and platen 2a ' integrated with fixing runner plate 2a be in together simultaneously as the fixing fixing tooth end face 2b10 of the Topland of roll bending 2b.
Fig. 3 (a) is the longitudinal sectional view of whirlpool dish member of circling round, and (b) is plan view.In Fig. 3 (a); The roll bending 3b that circles round that is provided with circle round runner plate 3a and setting above that is that the main composition whirlpool dish member 3 that circles round partly meshes with said fixed eddy plate member 2; Carry out circumnutation through making this whirlpool of circling round coil member 3 not rotations ground, thereby between the dish member of two whirlpools, form pressing chamber 100 (Fig. 1).
Under common operating condition, whirlpool dish member 3 quilts that circle round are to fixed eddy plate member 2 application of forces.That is, the adsorption force of the whirlpool dish member 3 that circles round of this moment is towards the top of Fig. 1.Consequently, promptly the circle round force surface 3c that circles round of face of roll bending side of edge portion 3e of the periphery of runner plate 3a that circles round is slided in the time of the fixed datum 2c of fixed eddy plate member 2 application of force.That is, the force surface 3c that circles round becomes the thrust face of the whirlpool dish member 3 that circles round, and at the fixed datum 2c of whirlpool dish member 2 that is relatively fixed, leans on the zone at center to become thrust-bearing than said edge portion.
Next, common action is described.At first, describe for the mobile of working fluid.Sucking the working fluid of pressing is boosted to described pressing chamber 100 inflows and quilt through suction chamber 105 from suction pipe 50.At this and since the suction chamber 105 of the pressing chamber before being equivalent to close be formed at pressing chamber 100 around (with reference to Fig. 4), so it is more promptly to lean on the roll bending place to become the situation that sucks the nip territory near the center of the force surface 3c that circles round.
Then, working fluid sprays to the chamber, the fixedly back side 115 of fixed eddy plate member 2 from the spraying hole 2d that leans on centre after pressing chamber 100 is boosted.Need to prove, at this, when overcompression, also 22 ejections of bypass valve on every side from being arranged on spraying hole 2d.Thus, applying ejection to the back side of fixed eddy plate member 2 presses.Then, working fluid flows into to the inner body of housing 8 through circumferential groove 4z, the peripheral groove 7f of stator, the through hole 7g of framework 4.Like this, housing 8 inside become ejection pressure, promptly so-called hyperbaric chamber type compressor.After contained oil is pulled away from compressor in the working fluid in housing 8, outside compressor, flow out from spraying pipe 55.
Next, flowing of oil is described.Owing to being that the 125 effect ejections of oil storage portion are pressed to the bottom, inner space of housing 8, so also become the ejection pressure naturally at the oil of this delay.Oil from fixed configurations at the feed member of the underpart of running shaft 6 80 through the vertical hole 6b of fuel feeding, discharge from end, and in lubricated circle round bearing 23 and main bearing 24, flow into to back pressure chamber 110 in the face of the inboard of the whirlpool dish member that circles round.
This be because, through after the back pressure control valve 26 stated to make the pressure that keep ejection to press and suck between pressing in the back pressure chamber 110 be back pressure, thereby and become between the oil storage portion 125 that ejection presses and produce pressure reduction, utilize this pressure reduction that oil is drawn up.At this moment, the space of circling round between runner plate 3a and the eccentric shaft hub 6a is promptly filled with by the oil that the bearing chamber 120 that circles round of bearing 23 sealing of circling round is ejected pressure, presses and becomes back spraying outgoing nip territory so the back side central part of the runner plate 3a that circles round becomes ejection.
The oil that flows into to this back pressure chamber 110 is through being communicated with back pressure chamber 110 and suction chamber 105 and being provided with the back pressure access 60 (with reference to Fig. 5) of back pressure control valve 26 halfway and flowing into to suction chamber 105.In addition, transfer to ejection chamber 95 with working fluid when improving the sealing of pressing chamber 100 to the oil that suction chamber 105 flows into, and spray to fixing chamber, the back side 115 from ejiction opening 2d.Then, oil turns back to oil storage portion 125 from the working fluid separation.Wherein, its sub-fraction flows out to the compressor outside with working fluid.
Next, use Fig. 5 to explain that the structure of this back pressure control valve 26 and back pressure keep action.Edge portion is provided with valve opening 26a at the back side of fixed eddy plate member 2; And put into tabular valve body 26c and valve spring 26b to this valve opening 26a; Insert at the end of valve spring 26b that the valve clearance insertion part 26g that diameter is bigger than valve opening 26a is pressed into valve clearance 26f under the state of spring locator protrusions 26d, thereby form back pressure control valve 26.At this moment, valve spring 26b is compressed, and valve body 26c becomes the state of pushing to the 26e of valve seal portion.Consequently, do not rise to this pressing force divided by the value of the inner region area of the 26e of valve seal portion (be scaled pressure after value) if back pressure and suck to press is compared, then valve body 26c is motionless.Therefore, back pressure boosts the pressure of the corresponding fixed value of the decrement of on the basis of suck pressing, appending the valve spring 26b when packing into.
Next, the influence that variation that Pd is pressed in influence that the variation of suck pressing Ps brings the whirlpool dish member that circles round and ejection brings the whirlpool dish member that circles round is described.At first, the influence to Ps describes.
Though as described above in theory, actual back pressure boosts the pressure of append value bigger slightly than the described value of appending.It the reasons are as follows.
Because this back pressure control valve 26 becomes the stream of oil, institute thinks and guarantees stream that valve body 26c must leave from the 26e of valve seal portion.Consequently, the decrement of valve spring 26b increases the amount that is pulled away from distance of valve seal 26e of portion and valve body 26c, and the back pressure rising amount corresponding with this increase.
As following, mark is defined, above situation is put in order through (1) formula.
Pb reality-Ps＞Pb in advance-Ps ... (1)
Ps: suck and press
Pd: ejection is pressed
Pb is real: actual back pressure
Pb is preparatory: corresponding with the decrement of valve spring and envision the back pressure that
Because the distance of separation of 26e of valve seal portion and valve body 26c reduces along with the minimizing of the oil mass that flows at back pressure control valve 26, so the relation of (2) formula of derivation.
Q: in the mobile oil mass of back pressure control valve
On the other hand, in the scroll compressor of this mode of execution, be the oil of lubricated circle round bearing 23 and main bearing 24 at back pressure control valve 26 mobile oil, they are in the differential pressure action current downflow of ejection pressure and back pressure.Therefore, (3) formula is set up.
In addition, press back pressure rising when rising owing to suck, so (4) formula is set up.
Derive the relation of (5) formula through these two relations.
Therefore, according to the relation of (5) and (2), the scroll compressor of this mode of execution is set up the relation of following (6).
That is, constitute when sucking and press when rising back pressure and to suck the pressure reduction of pressing and reduce.
(4) difference of formula and (6) formula is following.
Pb actual when (4) formula only representes that Ps becomes big also becomes big situation.Therefore, (4) formula does not represent that when Ps becomes big actual Pb become than the appended amount of increase of Ps is big, and the amount of the increase of the Ps that also do not represent to have become than to have appended is little or equal.That is, can't derive Pb actual when Ps becomes big and the pressure reduction of Ps (Pb reality-Ps) whether become big according to (4) formula.
On the other hand, (6) formula represent when Ps becomes big (Pb is real-situation about Ps) necessarily diminishing.
Promptly circle round at the back side of the whirlpool dish member 3 that the circles round edge portion of back side 3d of the back pressure of following control forms back pressure zone 155 (with reference to Fig. 8).The back pressure zone becomes the adsorption force generation mechanism that is used for adsorbing to fixed eddy plate member 2 the whirlpool dish member 3 that circles round with described back spraying outgoing nip territory 150 (with reference to Fig. 8).
Next, the influence of Pd is described.The area in back spraying outgoing nip territory 150 is set for and is promptly equated with respect to the area of the back pressure chamber opposition side of back pressure chamber side, ejection chamber 95 that the pressing chamber side forms in the surface side of the runner plate 3a that circles round, and desired location also is positioned to offset with ejection chamber 95 as the power that is pulled away from that originates from.
Next, use Fig. 6 explanation to set the area in back spraying outgoing nip territory 150 for method that the area of the ejection chamber 95 that forms with pressing chamber 100 sides at the runner plate 3a that circles round is equal to.
The ejection of pressing chamber 100 sides of runner plate 3a of circling round presses the area S (Pd) in the zone acted on to be assumed to, remove ejection chamber 95 along the area of contour of axial direction, also comprise half of tooth top area of two roll bending 2b, the 3b on the border that forms this ejection chamber 95.
Because the latter is the pressing chamber and the sealed department that sprays chamber 95 that is positioned at the outside of ejection chamber 95; So the part near ejection chamber 95 becomes the ejection pressure; Part near the pressing chamber in the outside becomes the pressure of this pressing chamber, presses and the part that middle pressure acted on of the pressure of this pressing chamber thereby can reasonably expect spraying.Therefore, the area that ejection pressure is acted on is the half the of tooth top area.
Owing to this regional area S (Pd) changes along with the whirlpool dish member 3 that circles round revolves round the sun; So originally should be with the area of its time mean value as back spraying outgoing nip territory; But become complicated on the contrary because be difficult to definition; So,, get the maximum value SM of changing value and the mean value of minimum value Sm as the good mode that clearly defines aspect approximate.
At this, the example of area of contour is as shown in Figure 6.The figure shows innermost pressing chamber is the moment that A1, A2 are communicated with ejection chamber A3 simultaneously.Suppose after just being communicated with,
SM＝A1+A2+A3
+K2+K3+S2+S3
+(K1+S1)/2
Become the maximum value SM of the area of contour of generation problem.In addition, suppose before just being communicated with, becoming Sm=A3+ (K3+S3)/2, thereby become the minimum value Sm of the area of contour that has problems.Therefore, become S (Pd)=(SM+Sm)/2.
In the past; The upper pressure limit of pressing chamber is become under the situation of ejection voltage levels; In extensive operating range; Overcome removed with ejection press the power that is pulled away from of the power that the is pulled away from composition be origin, promptly with suck press and exist with ... the power that is pulled away from that the pressure that sucks the pressing chamber of pressing is origin and least restrictive ground to the whirlpool dish member 3 that circles round to the adsorption force of fixed eddy plate member 2 application of forces, can be through obtaining than the pressure that the suction pressure exceeds certain value to whirlpool dish member 3 effects of circling round.
In other words, in this mode of execution, in operating range widely,, back pressure is held in than is sucked presses the pressure that exceeds certain value to get final product for the whirlpool dish member 3 that will circle round applies minimal active force to fixed eddy plate member 2.Before formula draw from each position that (Pb value in advance-Ps) is to coil member 3 applies setting value from minimal active force to fixed eddy plate member 2 to the whirlpool of circling round in the operating range widely.According to the definition of active force, the situation that active force is little representes that adsorption force is near the situation that is pulled away from the size of power.That is, because " active force=adsorption force-be pulled away from power ", so the little situation of active force is meant adsorption force and the little situation of difference that is pulled away from power, and the bulging deformation of the runner plate 3a that circles round diminishes.Therefore, in this mode of execution, we can say the situation below in wide operating range, satisfying.
At this, the back pressure valve principle is described.Under through upper pressure limit the situation as ejection voltage levels of bypass valve 22 (Fig. 1 reference) that suppresses overcompression with pressing chamber; In operating range widely; Overcome removed with ejection press the power that is pulled away from of the power that the is pulled away from composition be origin, promptly with suck press and exist with ... the power that is pulled away from that the pressure that sucks the pressing chamber of pressing is origin and minimally to the whirlpool dish member 3 that circles round to the adsorption force of fixed eddy plate member 2 application of forces, can be through obtaining than the pressure (Pb) that the suction pressure exceeds certain value to whirlpool dish member 3 effects of circling round.
Put down in writing according to the front of (7) formula, this back pressure valve principle and " active force be pulled away from pressing with ejection in the power be that the power of origin is offset in this mode of execution " can know, exist in widely in the operating range not interdependent ejection and press Pd and make active force become (Pb-Ps) value of minimum.(7) formula (Pb can make active force become minimum setting value in the operating range widely.
Therefore owing to make (Pb is real-Ps)-(Pb in advance-real the becoming of Pb that Ps) reduce near the value that can make active force minimized (Pb is preparatory), so if corresponding " situation that active force is little be circle round the bulging deformation of runner plate little " situation, then can derive (7) formula.
Thus, derive the relation of
according to (6) and (7).
Through above description, finish the brief configuration of mode of execution and follow the explanation of its action, next, mainly use Fig. 3, Fig. 7 (a), Fig. 8, Fig. 9 explain core of the present invention promptly circle round whirlpool dish member structure and with the action of this structurally associated.
The structure of the whirlpool dish member 3 that circles round at first, is described.Shown in Fig. 3 (a), the runner plate 3a two that circles round that the whirlpool of circling round is coiled member 3 is divided into roll bending runner plate 3a1 and the back side runner plate 3a2 that setting is provided with the roll bending 3b that circles round.At this, on roll bending runner plate 3a1, be formed with the bearing support 3p that circles round in the whole zone, back spraying outgoing nip territory 150 (with reference to Fig. 8) that comprises the back side of circling round.In addition, it is the runner plate gap that this roll bending runner plate 3a1 and back side runner plate 3a2 have axial gap, and fastening fixing at the edge portion 3e that circles round through screw 3q (with reference to Fig. 7 (a)).Also can be fastening through the screw beyond the screw threads for fastening, welding, slide moltenly apply, bonding is fixed or affixed.Need to prove that the runner plate gap is different with the tooth top bottom clearance.
The circle round face upwarding stereogram of whirlpool dish member of Fig. 7 (a) expression.At this; When fixing back side runner plate 3a2; Space sealing spare 200a in the runner plate installs in limit portion within it; Space sealing spare 200a has the material of metal spring part and engineering plastics in this runner plate, and inner edge portion and the circling round of roll bending runner plate 3a1 of back side runner plate 3a2 is sealed to movable to axial state (with reference to Fig. 9) between the bearing support 3p.
As stated; Through promptly circle round edge portion 3e and of the outside of screw 3q fixed mirror sheet separation through space sealing spare 200a sealing inner edge in the runner plate; And the runner plate separated is become back pressure chamber 110, runner plate 3a inside forms space 200 in the runner plate that is separated into the different back pressure chamber of pressure 110 circling round.
At this, space 200 in the runner plate among Fig. 3 (a) and Fig. 8 is shown for the ease of explanation turgidly, but in fact extremely thin.Its thickness level for not can because of after the thickness that contacts with roll bending runner plate 3a1 of the inner edge portion of the distortion back side runner plate 3a2 that states, the level of promptly counting μ m～100 μ m.
As shown in the figure, the section of space sealing spare 200a is to " コ " of back pressure chamber 110 openings font in the runner plate.That is the section shape that, does not have the bottom of quadrilateral shape.As after state, because of the pressure in space in the runner plate 200 is that to press the pressure of setting for than back pressure chamber in the runner plate be that back pressure is low,, consequently, have the effect that improves sealing so produce the distortion that the opening portion 200a1 of space sealing spare 200a in the runner plate opens.The section shape of this moment is not for there being following section shape in the trapezoidal shape of the following length of side.In addition, all projection 3a2a in interior all sides of runner plate 3a2 are provided with overleaf.This is in order in runner plate, to press accident to boost than preventing that space sealing spare 200a flies out from the gap in the runner plate under the high situation of back pressure.
Next, explain to make and press to than suck press the mechanism that presses in the middle of high in the runner plate.Shown in Fig. 3 (a) and (b), connect roll bending runner plate 3a1 ground (wherein, arriving except the position at the back side of circling round) the interior spatial communication road 200b of runner plate that the interior space 200 of pressing chamber 100 and runner plate is communicated with is set.As shown in Figure 4, this aperture position is set in and is accompanied by the outboard end of spatial communication road 200b in the runner plate is that the track of the circumnutation of the 200c of open communication portion skims over position pressing chamber 100, that promptly be communicated with off and on.Need to prove, in Fig. 4, also depict the whirlpool dish member 3 that circles round in the moment that spatial communication road 200b in the runner plate (200c of open communication portion) is communicated with pressing chamber 100.
Particularly, the track of setting spatial communication road 200b in the runner plate for open communication portion 200c is all to advance on the fixed datum of platen 2a ' in the ground, the obstructed overcompression of interior circle chamber of annulus.That is, in pressing chamber, because space 200 is communicated with in a flash in the phase place of circling round of Fig. 4 constantly in the low pressure pressing chamber 100a (with reference to Fig. 4) that boosts slightly from suction chamber 105 and the runner plate, so the horizontal fixed of the interior pressure of runner plate becomes the stress level of pressing chamber shown in Figure 4.The stress level of this pressing chamber multiply by the value of compression chamber volume after than the power of the adiabatic index of the working fluid of (compression chamber volume/compression chamber volume when closing) for suck pressing.
That is, voltage levels is fixed as and sucks the certain multiple of pressing in the runner plate.And; As after state; Owing to can in runner plate, press the distortion removal of the runner plate 3a that circles round that causes and the synchronous change of rotation of running shaft 6,, make the axial clearance stabilization so can make the distortion stabilization of the runner plate 3a that circles round; And improve sealing, thereby have the effect that suppresses to leak and improve performance based on oil.
This mode of execution does not drop on the interior circle that spatial communication road 200b in the runner plate sets the track of the 200c of open communication portion on the pressing chamber, and cylindrical drops on the pressing chamber.In addition, the whole zone of operating condition is littler than back pressure owing to being pressed in this runner plate, so the desired location of spatial communication road 200b disposes to the coiling end side of the roll bending 3b that circles round in the runner plate.
Next, the whirlpool dish member 3 that circles round that uses Fig. 8 explanation as above the to constitute action under the situation of said scroll compressor of packing into.
The whirlpool dish member 3 that circles round has the back spraying outgoing nip territory 150 of back pressure zone 155 and central authorities at the outer avris of the back side 3d that circles round; Thus; The power that makes progress among the generation figure (aforesaid adsorption force); Because this power is greater than the downward power (the aforesaid power of being pulled away from) of the compression of following working fluid, so to fixed eddy plate member 2 application of forces.Mainly be to consider according to the magnitude relationship of pressure, adsorption force is suction chamber 105 parts that form in the edge portion of erectting the zone that the roll bending 3b that circles round is set with the position that active force acted on that is pulled away from the difference of power.
That is, as shown in Figure 8, the deformation pattern of the integral body of the whirlpool dish member 3 that circles round is the shape that raises up, the force surface 3c that circles round in the center side of the edge portion of the fixed datum 2c of fixed eddy plate member 2 by the application of force.Therefore, under the existing situation that does not have space 200 in the runner plate, the tooth flank 3a10 that circles round becomes the shape protruding upward that thick double dot dash line is represented, and it is protruding upward too to erect the Topland 3b10 of the roll bending 3b that circles round be arranged at this.
In this mode of execution; Be provided with space 200 in the runner plate; Making the pressure inside in space 200 in the runner plate through described mechanism is to press to middle press lower but higher than the suction pressure than back pressure in the runner plate, consequently, can suppress the bulging deformation of roll bending runner plate 3a1 tooth root portion.Below, its reason is described.
Therefore the rotatable phase that forms along with running shaft 6 owing to said ejection chamber 95 makes area change, makes the masterpiece of the recessed direction of the central part of roll bending runner plate 3a1 be used for the surface of the central part of roll bending runner plate 3a1.Yet; As said; Owing to be provided with the back spraying outgoing nip territory 150 that has with the equal area of the average area in the phase angle of this ejection chamber 95 at the back side of roll bending runner plate 3a1 central part, so the power of pressing the recessed direction of the central part that causes roll bending runner plate 3a1 because of the ejection of ejection chamber 95 is by roughly counteracting.Consequently, the surface of roll bending runner plate 3a1 can be regarded as only becomes the state that the pressure that sucks the pressing chamber 100 of pressing and existing with ... this suctions pressure is had an effect.
The pressure that acts on the relative roll bending runner plate 3a1 back side be press in the runner plate for than back pressure low in the middle of press, therefore with do not have runner plate in the existing situation of the big high rigidity of space and runner plate thickness compare, the amount of bow downwards of roll bending runner plate 3a1 increases.
Consequently, as shown in Figure 8, the tooth flank 3a10 that circles round can be from representing the thick double dot dash line displacement downwards of existing tooth flank, thereby can the Deformation control of runner plate be become the shape near the plane.In addition, erect the Topland 3b10 of the roll bending 3b that circles round that is provided with the approaching runner plate in this plane also can be approaching with the plane.Thus, no longer need required in the past being used for axially set the tooth top to two whirlpools dish member 2,3 in gap, step processing, the gradient processing that tooth root carries out, thus the effect that can obtain to cut down finished cost.
Back side runner plate 3a2 receives back pressure overleaf, and upper surface over there bears in the low runner plate of pressure ratio back pressure and presses, so as shown in Figure 8, inner edge portion (leaning on the center) forms the distortion of projection.Yet, since the inner edge portion of 3a2 with leave with the incorporate bearing support 3p that circles round of roll bending runner plate 3a1, so back pressure can not make roll bending runner plate 3a1 to top offset, the planeness of the tooth flank 3a10 that circles round is reduced.In addition, through space sealing spare 200a in the runner plate, the interior week of circle round bearing support 3p and back side runner plate 3a2 can be movable relatively vertically, but owing to can guarantee sealing, so can separate space 200 and back pressure chamber 110 in the runner plate reliably.Under a certain pressure condition of the distortion of having controlled the runner plate 3a that circles round, the higher planeness of realize circling round tooth flank 3a10 and the Topland 3b10 that circles round.
As stated, in this mode of execution,, also can keep this higher planeness even becoming from this pressure condition under the situation of different pressure conditions.Shown in it the reasons are as follows.
At first, can consider to spray the situation of pressing after changing.As noted earlier; Have and back spraying outgoing nip territory 150, the ejection nip territory of the table side that acts on the runner plate 3a that circles round owing on the back side 3d that circles round, be provided with homalographic; So they offset, therefore become the form that ejection is pressed that on the runner plate 3a that circles round, do not act in fact.Therefore, for example, even the changing of ejection Hair Fixer of operating condition because the distortion of the runner plate 3a that circles round does not change, also can keep narrow state under the indeclinable situation of axial clearance.
Next, can consider to suck the situation of changing of Hair Fixer.Can know the relation of (8) formula below in this mode of execution, setting up according to former investigation.
On the other hand, owing to press the certain multiple of pressing in the runner plate that circles round in the runner plate in space,, then press in the runner plate also to become big if sucking to press uprises for sucking.So, because in the runner plate that circles round expand in the space, so the bulging deformation of the runner plate 3a that circles round also increases.That is, set up following relation.
What in fact can learn is, presses when increasing when sucking, and produces opposite variation i.e. (8) and (9) simultaneously, so the distortion of the runner plate 3a that can suppress to circle round.
As stated, according to this mode of execution, even make ejection press, suck to press and change, because the amount of deformation of the runner plate 3a that circles round do not change, so under all pressure conditions, the runner plate distortion of circling round is not changed and keep constant.Consequently, become appropriate value in operating range widely, thereby can suppress leakage down, scroll compressor efficiently can be provided at operating condition widely with the axial setting gap of a certain pressure condition coupling.
So far only considered pressure distortion, but in fact thermal distortion also is the factor that produces distortion.Therefore, consider thermal distortion, can further realize high efficiency thereby set axial clearance.
At this; Usually, as constituting the right structure of straight line, the groove of straight line shape is set on the back side 3d that circles round with European ring 5; But, on the back side of whirlpool dish member 3 of circling round, the European projection 3x of circling round of straight line shape projection is set on the contrary in order further to improve under the situation of intensity to back side runner plate 3a2.Fig. 7 (b) representes the stereogram of this European ring.
Follow in this, on European ring 5, be provided with framework 4 and form right European projection 5y and the European groove 5x of straight line.At this moment, in order to keep the rigidity of European ring 5, be provided with reinforcement projection 5x1 in the inboard of European groove 5x.
According to this structure, can suppress thickness thinner, thereby can obtain to suppress the effect of the size of compressor than the common European ring that possesses projection up and down.In addition, owing to can reduce the weight of European ring 5, so can obtain to reduce the vibration that produces because of European ring 5 to-and-fro motion and the effect of noise.In addition, because the European projection 3x that circles round has the effect of the flank of back side runner plate 3a2, so have the effect of the rigidity that can improve back side runner plate 3a2.
In addition, because that the thickness of runner plate forms roll bending runner plate 3a1 is thicker than back side runner plate 3a2, so can European annular groove be arranged on the force surface 3c that circles round.
In addition, as said, press constant in the runner plate, thus, can eliminate expansion-loss again, thereby can avoid following performance to reduce in this via the working fluid in space in the runner plate 200.In fact, owing in limited circumnutation interval, be communicated with, so produce some variation in pressure.Yet, as said, because the volume in space 200 is minimum in the runner plate, so become can unheeded degree for the expansion-loss again that produces because of variation in pressure.
And in this mode of execution, the interior circle that the interior spatial communication road 200b of runner plate sets the track of the 200c of open communication portion for does not drop on the pressing chamber; And cylindrical drops on the pressing chamber; But being not limited thereto, certainly, also can be that the interior circle of the track of the 200c of open communication portion drops on the low pressure pressing chamber 100a; But reduce the diameter of the 200c of open communication portion, thereby reduce width as the annulus of its track.Thus, even the location dislocation of the 200c of open communication portion also diminishes in the change of the 200c of open communication portion flowing process fluid amount, the deviation of expansion-loss also diminishes again, thereby has the effect that the aberrations in property of compressor diminishes.
(mode of execution 2)
Next, the scroll compressor of the face upwarding stereogram explanation second embodiment of the invention of the whirlpool dish member that circles round of the longitudinal profile enlarged view of the runner plate edge portion of use Figure 10 (a) and Figure 10 (b).
In this second mode of execution,, all identical with first mode of execution except the back side that makes the edge portion 3e that circles round and the integrated this point of roll bending runner plate 3a1.According to this distinctive points, with being pressed in interior week of the back side, the outside 3ae of portion of the outer circumferential roll bending runner plate 3a1 of back side runner plate 3a2, hot charging or shrink-fit and fixing the two, thereby obtain the effect that cuts down finished cost.
At this, though use a screw 3r as rotary stopper spare for the rotation that prevents back side runner plate 3a2,,, also rotary stopper spare can be set as long as can guarantee the interference embedded quantity.Though the back side of the 3ae of portion is recessed from the back side, outside through the thickness of attenuate back side runner plate 3a2; Thereby guarantee δ; The management of the gap back gap of the seat surface that circles round (not shown) of back side 3d and framework 4 becomes easily but the feasible thus parameter of confirming to turn round when starting is circled round, thereby can obtain to reduce the effect of assembly cost.Because the thickness of back side runner plate 3a2 becomes and it doesn't matter for back gap, so the size that must manage in the runner plate side of circling round is the thickness of the edge portion 3e that circles round of roll bending runner plate 3a1.
Claims (6)
1. scroll compressor, it possesses:
The whirlpool dish member that circles round, it has runner plate and erects the roll bending that is arranged on the scroll on the runner plate, and with carry out circumnutation in setting is provided with the promptly axially vertical face of direction;
The fixed eddy plate member, it has runner plate and erects the roll bending that is arranged on the scroll on the runner plate, and meshes with the said whirlpool dish member that circles round;
The adsorption force applying mechanism; It produces adsorption force; That this adsorption force overcomes is that the pressure of the working fluid of the pressing chamber that said fixed eddy plate member forms with circling round the engagement of whirlpool dish member produces, the power that is pulled away from the direction that member is pulled away from from said fixed eddy plate member is coiled in the whirlpool of will saidly circling round; And for runner plate that the said runner plate that circles round whirlpool dish member is promptly circled round acts on the said whirlpool dish member that circles round to the platen application of force, promptly fixedly runner plate is integrated and become and the i.e. fixing roughly the same face of the tooth top of roll bending of the roll bending of fixed eddy plate member for the runner plate of said platen and said fixed eddy plate member;
Intake system, it becomes working fluid to suck to said pressing chamber importing presses;
The ejection system, it will working fluid pressurized become the ejection pressure to the outside derivation in said pressing chamber,
Said scroll compressor is characterised in that,
Said adsorption force applying mechanism on the said runner plate that circles round whirlpool dish member promptly circles round runner plate with the back side of the circling round opposite side of said fixed eddy plate member on through having imported back spraying outgoing nip territory that ejection presses and having imported that to suck the pressure of pressing in the middle of pressing with ejection be that the back pressure zone of back pressure forms
The area in said back spraying outgoing nip territory be at the coiling top of said roll bending be roll bending central authorities end and said ejection system connectivity and be clipped in zone between said two runner plates promptly spray the chamber from the observed area of contour of said axial direction; Add maximum value and the value between the minimum value of half area of tooth top area of roll bending portion on border that forms this ejection chamber and will spray the pressing chamber of chamber encirclement
Said back pressure zone makes its back pressure reduce back pressure along with sucking the increase of pressing and sucks the pressure reduction of pressing,
The said runner plate that circles round is divided into roll bending and erects roll bending runner plate and the back side runner plate that is provided with, and said roll bending runner plate makes said back spraying outgoing nip integration domain near centre,
Have axial runner plate gap between said back side runner plate and the said roll bending runner plate and be fixed and be connected in edge portion; It is axially-moveable and with said runner plate gap and the separated sealing mechanism in the said runner plate back side and be divided into space in the runner plate that said back side runner plate possesses the inner edge of making portion
The pressure in space is to press to middle press lower and higher than the suction pressure than said back pressure in the runner plate in the runner plate.
2. scroll compressor according to claim 1 is characterized in that,
Press through spatial communication road in the runner plate in the said runner plate to import, the spatial communication road connects said roll bending runner plate and makes spatial communication in said pressing chamber and the said runner plate in the said runner plate.
3. scroll compressor according to claim 2 is characterized in that,
The said pressing chamber side opening portion on spatial communication road is that the runner plate mouth only is communicated with said pressing chamber in the said runner plate, and, said intake system regional with said back pressure is not communicated with.
4. scroll compressor according to claim 3 is characterized in that,
It is that the interior circle of runner plate mouth annulus is fully on said platen that said runner plate mouth is arranged to track that said circumnutation describes.
5. according to each described scroll compressor in the claim 1 to 4, it is characterized in that,
The back side outermost perimembranous of the said runner plate that circles round and said roll bending runner plate are integrated, with said back side runner plate being pressed in interior week or hot charging to the back side outermost perimembranous of the said runner plate that circles round.
6. scroll compressor; Its pressure through back pressure chamber coils member to the fixed eddy plate member application of force to the whirlpool of circling round, and said whirlpool dish member and engagement of said fixed eddy plate member and the formation pressing chamber of circling round, and working fluid is compressed; Said scroll compressor is characterised in that
In said set inside of circling round whirlpool dish member space in the runner plate is arranged,
The said whirlpool dish member that circles round disposes the access that is communicated with space in said pressing chamber and the said runner plate, with the pressure higher and lower than the pressure of said back pressure chamber than suction pressure of space behavior in said runner plate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010188984A JP5269011B2 (en) | 2010-08-26 | 2010-08-26 | Scroll compressor |
| JP2010-188984 | 2010-08-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102384084A true CN102384084A (en) | 2012-03-21 |
| CN102384084B CN102384084B (en) | 2014-05-14 |
Family
ID=45823802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110240987.0A Expired - Fee Related CN102384084B (en) | 2010-08-26 | 2011-08-22 | Scroll compressor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5269011B2 (en) |
| CN (1) | CN102384084B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105980661A (en) * | 2014-02-12 | 2016-09-28 | 三电控股株式会社 | Scroll expander |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2539552B2 (en) * | 1991-06-21 | 1996-10-02 | 株式会社日立製作所 | Hermetic scroll compressor |
| CN1333433A (en) * | 2000-07-11 | 2002-01-30 | 富士通将军股份有限公司 | Turbine compressor |
| KR20030044241A (en) * | 2001-11-29 | 2003-06-09 | 주식회사 롤텍 | Back Pressure Structure of Scroll Compressor |
| JP4262701B2 (en) * | 2005-07-21 | 2009-05-13 | 株式会社日立製作所 | Scroll compressor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2505641Y2 (en) * | 1987-12-19 | 1996-07-31 | トキコ株式会社 | Oil-free scroll fluid machine |
| JPH0526180A (en) * | 1991-07-19 | 1993-02-02 | Mitsubishi Heavy Ind Ltd | Scroll type fluid machine |
| JPH0719187A (en) * | 1993-07-01 | 1995-01-20 | Hitachi Ltd | Scroll fluid machine |
| JP2008138572A (en) * | 2006-11-30 | 2008-06-19 | Mitsubishi Electric Corp | Scroll type fluid machine |
-
2010
- 2010-08-26 JP JP2010188984A patent/JP5269011B2/en not_active Expired - Fee Related
-
2011
- 2011-08-22 CN CN201110240987.0A patent/CN102384084B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2539552B2 (en) * | 1991-06-21 | 1996-10-02 | 株式会社日立製作所 | Hermetic scroll compressor |
| CN1333433A (en) * | 2000-07-11 | 2002-01-30 | 富士通将军股份有限公司 | Turbine compressor |
| KR20030044241A (en) * | 2001-11-29 | 2003-06-09 | 주식회사 롤텍 | Back Pressure Structure of Scroll Compressor |
| JP4262701B2 (en) * | 2005-07-21 | 2009-05-13 | 株式会社日立製作所 | Scroll compressor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105980661A (en) * | 2014-02-12 | 2016-09-28 | 三电控股株式会社 | Scroll expander |
| CN105980661B (en) * | 2014-02-12 | 2018-10-30 | 三电控股株式会社 | Scroll expander |
| US10301940B2 (en) | 2014-02-12 | 2019-05-28 | Sanden Holdings Corporation | Scroll expander |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2012047082A (en) | 2012-03-08 |
| CN102384084B (en) | 2014-05-14 |
| JP5269011B2 (en) | 2013-08-21 |
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