CN205858664U - Screw compressor and scroll plate thereof - Google Patents

Abstract

The utility model discloses the scroll plate of a kind of screw compressor, including disk body, the scroll wrap that is arranged on described disk body；The flute profile line of described scroll wrap includes being positioned at the central segment of described disk body center and being positioned at the periphery section of disc perimeter, and the wall thickness of the scroll wrap of the wall ratio periphery section of the scroll wrap of described central segment is big.The invention also discloses a kind of screw compressor with this scroll plate.This utility model avoids and damages scroll plate between motion vortex dish and fixed scroll because of deformation, but also ensure that the overall performance of screw compressor.

Description

Screw compressor and scroll plate thereof

Technical field

This utility model relates to compressor field, particularly relates to screw compressor and scroll plate thereof.

Background technology

Screw compressor is cooperated by motion vortex dish and fixed scroll, under the driving of bent axle, makes cold-producing medium Formed in scroll plate and suck, compress and continuously running of spuing.Cold-producing medium is in compression process, to center outside scroll plate Pressure and temperature all gradually rise, and especially when central side, pressure and temperature are the highest.Therefore, the vortex wall of scroll plate The deformation occurred at central side is maximum, and suffered effect is also maximum.In order to avoid motion vortex dish and fixed scroll Scroll plate is damaged, frequently with increasing motion vortex dish and fixed scroll in prior art because of the contact of deformation generation between dish Back lash between dish, but, scroll plate back lash increases will cause internal leakage between scroll plate to increase, thus affects vortex Compressor overall performance.

Utility model content

Main purpose of the present utility model is to provide a kind of screw compressor and scroll plate, it is intended to improve touching of scroll plate Hit intensity, the most do not affect screw compressor overall performance.

For achieving the above object, this utility model provides the scroll plate of a kind of screw compressor, including disk body, is arranged on Scroll wrap on described disk body；The flute profile line of described scroll wrap includes the central segment being positioned at described disk body center and is positioned at dish The periphery section of body periphery, and the wall thickness of the scroll wrap of the wall ratio periphery section of the scroll wrap of described central segment is big.

Preferably, the wall thickness of the scroll wrap of described central segment tapers into outer rim from the center of described disk body.

Preferably, the wall thickness of the scroll wrap of described periphery section is equal.

Preferably, described central segment is spiral of Archimedes, and described periphery section is circle involute.

Preferably, described central segment includes that outside center, outside molded line and center inside molded line, and described center, molded line is full Foot:

$\begin{array}{cc}\begin{array}{c}{x}_1\left(\mathrm{\φ}\right)={\mathrm{a\φ}}^k\cos \left(\mathrm{\φ}\right)-\mathrm{\ξ}\cos \[\mathrm{\φ}-\arctan (k/\mathrm{\φ})\]\\ y_1\left(\mathrm{\φ}\right)={\mathrm{a\φ}}^k\sin \left(\mathrm{\φ}\right)-\mathrm{\ξ}\sin \[\mathrm{\φ}-\arctan (k/\mathrm{\φ})\]\end{array}& ({\mathrm{\θ}}_0\≤\mathrm{\φ}\≤{\mathrm{\θ}}_1)\end{array}$

Described center inside molded line meets:

$\begin{array}{cc}\begin{array}{c}{x}_2\left(\mathrm{\φ}\right)=-{\mathrm{a\φ}}^k\cos \left(\mathrm{\φ}\right)-\mathrm{\ξ}\cos \[\mathrm{\φ}-\arctan (k/\mathrm{\φ})\]\\ y_2\left(\mathrm{\φ}\right)=-{\mathrm{a\φ}}^k\sin \left(\mathrm{\φ}\right)-\mathrm{\ξ}\sin \[\mathrm{\φ}-\arctan (k/\mathrm{\φ})\]\end{array}& ({\mathrm{\θ}}_2\≤\mathrm{\φ}\≤{\mathrm{\θ}}_3)\end{array}$

Wherein, a is spiral of Archimedes coefficient；φ is angle parameter；K is spiral of Archimedes index；ξ is revolution Radius；θ₀The exhibition angle angle of the starting point of molded line outside centered by；θ₁Centered by outside molded line end point at angle, exhibition angle Degree；θ₂The exhibition angle angle of the starting point of molded line inside centered by；θ₃Centered by inner side molded line end point at exhibition angle angle.

Preferably, described spiral of Archimedes index k < 1.

Preferably, described periphery section includes outside periphery that inside molded line and periphery, outside molded line, and described periphery, molded line is full Foot:

$\begin{array}{cc}\begin{array}{c}{x}_3\left(\mathrm{\&phi;}\right)=R\&lsqb;\cos \left(\mathrm{\&phi;}\right)+(\mathrm{\&phi;}-{\mathrm{\&alpha;}}_1)\sin \left(\mathrm{\&phi;}\right)\&rsqb;\\ y_3\left(\mathrm{\&phi;}\right)=R\&lsqb;\sin \left(\mathrm{\&phi;}\right)+(\mathrm{\&phi;}-{\mathrm{\&alpha;}}_1)\cos \left(\mathrm{\&phi;}\right)\&rsqb;\end{array}& ({\mathrm{\&theta;}}_4\&le;\mathrm{\&phi;}\&le;{\mathrm{\&theta;}}_5)\end{array}$

Inside described periphery, molded line meets:

$\begin{array}{cc}\begin{array}{c}{x}_4\left(\mathrm{\&phi;}\right)=R\&lsqb;\cos \left(\mathrm{\&phi;}\right)+(\mathrm{\&phi;}-{\mathrm{\&alpha;}}_2)\sin \left(\mathrm{\&phi;}\right)\&rsqb;\\ y_4\left(\mathrm{\&phi;}\right)=R\&lsqb;\sin \left(\mathrm{\&phi;}\right)+(\mathrm{\&phi;}-{\mathrm{\&alpha;}}_2)\cos \left(\mathrm{\&phi;}\right)\&rsqb;\end{array}& ({\mathrm{\&theta;}}_6\&le;\mathrm{\&phi;}\&le;{\mathrm{\&theta;}}_5)\end{array}$

Wherein, R is the base radius of circle involute；φ is angle parameter；α₁Send out for the circle involute of molded line outside periphery The male character types in Chinese operas, usu. referring tov the bearded character；α₂Angle is there is for the circle involute of molded line inside periphery；θ₄For the exhibition angle angle of the starting point of molded line outside periphery；θ₅ For the exhibition angle angle at the end point of molded line outside periphery；θ₆For the exhibition angle angle of the starting point of molded line inside periphery.

Preferably, inside described periphery there is angle α in the circle involute of molded line₂Send out more than the circle involute of molded line outside periphery The male character types in Chinese operas, usu. referring tov the bearded character α₁, and R [π-(α₂-α₁)]=2 ξ.

Preferably, described scroll plate is motion vortex dish or fixed scroll.

Additionally, for achieving the above object, present invention also offers a kind of screw compressor, described screw compressor includes fortune Orbiter and fixed scroll, described fortune scroll plate and fixed scroll are the scroll plate of said structure, and described motion The flute profile line of scroll plate and the flute profile line of fixed scroll are staggered 180 °.

This utility model by being divided into central segment and periphery section, and the wall of the scroll wrap of central segment by the flute profile line of scroll plate Thick increase so that the impact strength of scroll plate improves, it is to avoid damage because of deformation between motion vortex dish and fixed scroll Scroll plate；And scroll plate back lash is also without increase, therefore can ensure that the overall performance of screw compressor.

Accompanying drawing explanation

In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, the accompanying drawing in describing below is only It is embodiments more of the present utility model, for those of ordinary skill in the art, in the premise not paying creative work Under, it is also possible to other accompanying drawing is obtained according to the structure shown in these accompanying drawings.

Fig. 1 is the cross section structure schematic diagram of screw compressor one embodiment of the present utility model；

Fig. 2 is the flute profile line schematic diagram of the motion vortex dish of screw compressor of the present utility model；

Fig. 3 is the flute profile line schematic diagram of the fixed scroll of screw compressor of the present utility model；

Fig. 4 is motion vortex dish of the present utility model and the flute profile line schematic diagram of fixed scroll engagement.

Drawing reference numeral illustrates:

Label	Title	Label	Title
				101	Casing	15	Motor
102	Upper cover	16	Oil sump
				103	Lower cover	17	Slave frame
11	Fixed scroll	18	Suction nozzle
				12	Motion vortex dish	19	Exhaustor
13	Mainframe	10	Central segment
				14	Bent axle	20	Periphery section

The realization of this utility model purpose, functional characteristics and advantage will in conjunction with the embodiments, see accompanying drawing and are described further.

Detailed description of the invention

Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present utility model rather than all Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not making creative work premise Lower obtained every other embodiment, broadly falls into the scope of this utility model protection.

It is to be appreciated that directional instruction (such as up, down, left, right, before and after ...) in this utility model embodiment It is only used for explanation relative position relation under a certain particular pose between each parts, motion conditions etc., if this particular pose When changing, then directionality instruction changes the most therewith.

If it addition, relate to the description of " first ", " second " etc. in this utility model, then it is only used for describing purpose, and It is not intended that indicate or imply its relative importance or the implicit quantity indicating indicated technical characteristic.Thus, limit Have " first ", the feature of " second " can express or implicitly include at least one this feature.It addition, between each embodiment Technical scheme can be combined with each other, but must be to work as technical side based on those of ordinary skill in the art are capable of The combination of case occurs conflicting people to think that the combination of this technical scheme does not exists, the most not in this reality when maybe cannot realize Within protection domain with novel requirement.

This utility model mainly proposes a kind of scroll plate being applied to screw compressor, and this scroll plate includes motion vortex dish And fixed scroll.By the scroll plate of existing screw compressor is improved so that it is applied in screw compressor, Not only increase the impact strength between motion vortex dish and fixed scroll, but also improve the complete machine of screw compressor Energy.

As it is shown in figure 1, this screw compressor includes the airtight collecting formed by casing 101, upper cover 102 and lower cover 103 Space, i.e. compressor housing.Be provided with in this receiving space fixed scroll 11, motion vortex dish 12, mainframe 13, bent axle 14, Motor 15, oil sump 16, slave frame 17.Wherein,

Casing 101 is cylinder block, and these cylinder body two ends are opening-like.Upper cover 102 and an opening adapter of cylinder body Close, and setting of arching upward in the middle part of upper cover 102.Lower cover 103 engages with another opening adaptation of cylinder body, and arches upward in the middle part of lower cover 103 and set Put.The lower cover 103 and the cylinder body that arch upward enclose the oil sump 16 formed bottom compressor, are used for installing lubricating oil.Fixed scroll 11 It is respectively provided with scroll wrap with motion vortex dish 12, and both scroll wrap engage each other, form a series of crescent compression chamber.Main Frame 13 is positioned at the lower section of motion vortex dish 12.Motor 15 is between mainframe 13 and slave frame 17；And motor 15 is with main Space between space between frame 13, and motor and slave frame 17 forms discharge chamber.

The operation principle of above-mentioned screw compressor is: bent axle 14, under the drive of motor 15, drives motion vortex dish 12 to enter Row eccentric operating, now coolant will be drawn into be made up of fixed scroll 11 and motion vortex dish 12 multiple from suction nozzle 18 In crescent compression chamber.Along with the eccentric operating of orbiter, crescent compression chamber is constantly moved to center by outer rim.With Time intracavity coolant be also pushed to center, constantly raise along with chamber volume constantly reduces the pressure of intracavity, until coolant becomes high Calm the anger and be discharged in discharge chamber by fixed scroll 11 after body, finally discharged by exhaustor 19.Meanwhile, lubricating oil is in bent axle 14 bottom Oil Guide parts effect under, from oil sump 16 along center oilhole upwards portion's fuel feeding of bent axle 14, lubrication scroll plate in and After rubbing surface between scroll plate and mainframe, oil sump 16 bottom return.

Above-mentioned motion vortex dish is basically identical with the Scroll plate structure of fixed scroll, the most all includes disk body and is located at disk body On scroll wrap.And the flute profile line of the flute profile line of the scroll wrap of motion vortex dish and the scroll wrap of fixed scroll is staggered 180°.Mainly carry out structure description with the scroll wrap of motion vortex dish below.

As in figure 2 it is shown, the flute profile line of this scroll wrap includes the central segment 10 being positioned at described disk body center and is positioned at dish The periphery section 20 of body periphery, and the wall thickness of the scroll wrap of the wall ratio periphery section 20 of the scroll wrap of described central segment 10 is big.Logical The wall thickness crossing scroll wrap by central segment 10 increases so that the impact strength of scroll plate improves, it is to avoid motion vortex dish and solid Determine to damage between scroll plate scroll plate because of deformation；And scroll plate back lash is also without increase, therefore can ensure that whirlpool The overall performance of rotation compressor.

In one embodiment, the wall thickness of the scroll wrap of above-mentioned central segment tapers into outer rim from the center of disk body.I.e. In the scroll wrap of central segment, the closer to the position at disk body center, the wall thickness of scroll wrap is the biggest.It is understood that periphery section The wall thickness of scroll wrap can also taper into outer rim from initial position.In another embodiment, the scroll wrap of above-mentioned central segment Wall thickness can be equal.The wall thickness of the scroll wrap of periphery section can also be equal.

Above-mentioned central segment 10 is formed by spiral of Archimedes, and periphery section 20 is formed by circle involute.Specifically, this center Section includes molded line AB section and center inside molded line DE section outside center.Wherein, outside this center, molded line AB section meets below equation Formula:

$\begin{array}{cc}\begin{array}{c}{x}_1\left(\mathrm{\&phi;}\right)={\mathrm{a\&phi;}}^k\cos \left(\mathrm{\&phi;}\right)-\mathrm{\&xi;}\cos \&lsqb;\mathrm{\&phi;}-\arctan (k/\mathrm{\&phi;})\&rsqb;\\ y_1\left(\mathrm{\&phi;}\right)={\mathrm{a\&phi;}}^k\sin \left(\mathrm{\&phi;}\right)-\mathrm{\&xi;}\sin \&lsqb;\mathrm{\&phi;}-\arctan (k/\mathrm{\&phi;})\&rsqb;\end{array}& ({\mathrm{\&theta;}}_0\&le;\mathrm{\&phi;}\&le;{\mathrm{\&theta;}}_1)\end{array}$

Above-mentioned center inside molded line DE section meets below equation:

$\begin{array}{cc}\begin{array}{c}{x}_2\left(\mathrm{\&phi;}\right)=-{\mathrm{a\&phi;}}^k\cos \left(\mathrm{\&phi;}\right)-\mathrm{\&xi;}\cos \&lsqb;\mathrm{\&phi;}-\arctan (k/\mathrm{\&phi;})\&rsqb;\\ y_2\left(\mathrm{\&phi;}\right)=-{\mathrm{a\&phi;}}^k\sin \left(\mathrm{\&phi;}\right)-\mathrm{\&xi;}\sin \&lsqb;\mathrm{\&phi;}-\arctan (k/\mathrm{\&phi;})\&rsqb;\end{array}& ({\mathrm{\&theta;}}_2\&le;\mathrm{\&phi;}\&le;{\mathrm{\&theta;}}_3)\end{array}$

Wherein, a is spiral of Archimedes coefficient；φ is angle parameter；K is spiral of Archimedes index；ξ is revolution Radius；θ₀The exhibition angle angle of the starting point of molded line outside centered by；θ₁Centered by outside molded line end point at angle, exhibition angle Degree；θ₂The exhibition angle angle of the starting point of molded line inside centered by；θ₃Centered by inner side molded line end point at exhibition angle angle.

Further, above-mentioned spiral of Archimedes index k < 1.

Above-mentioned periphery section 20 includes outside periphery molded line EF section inside molded line BC section and periphery, and molded line outside described periphery BC section meets below equation:

$\begin{array}{cc}\begin{array}{c}{x}_3\left(\mathrm{\&phi;}\right)=R\&lsqb;\cos \left(\mathrm{\&phi;}\right)+(\mathrm{\&phi;}-{\mathrm{\&alpha;}}_1)\sin \left(\mathrm{\&phi;}\right)\&rsqb;\\ y_3\left(\mathrm{\&phi;}\right)=R\&lsqb;\sin \left(\mathrm{\&phi;}\right)+(\mathrm{\&phi;}-{\mathrm{\&alpha;}}_1)\cos \left(\mathrm{\&phi;}\right)\&rsqb;\end{array}& ({\mathrm{\&theta;}}_4\&le;\mathrm{\&phi;}\&le;{\mathrm{\&theta;}}_5)\end{array}$

Inside described periphery, molded line EF section meets below equation:

$\begin{array}{cc}\begin{array}{c}{x}_4\left(\mathrm{\&phi;}\right)=R\&lsqb;\cos \left(\mathrm{\&phi;}\right)+(\mathrm{\&phi;}-{\mathrm{\&alpha;}}_2)\sin \left(\mathrm{\&phi;}\right)\&rsqb;\\ y_4\left(\mathrm{\&phi;}\right)=R\&lsqb;\sin \left(\mathrm{\&phi;}\right)+(\mathrm{\&phi;}-{\mathrm{\&alpha;}}_2)\cos \left(\mathrm{\&phi;}\right)\&rsqb;\end{array}& ({\mathrm{\&theta;}}_6\&le;\mathrm{\&phi;}\&le;{\mathrm{\&theta;}}_5)\end{array}$

Wherein, R is the base radius of circle involute；φ is angle parameter；α₁Send out for the circle involute of molded line outside periphery The male character types in Chinese operas, usu. referring tov the bearded character；α₂Angle is there is for the circle involute of molded line inside periphery；θ₄For the exhibition angle angle of the starting point of molded line outside periphery；θ₅ For the exhibition angle angle at the end point of molded line outside periphery；θ₆For the exhibition angle angle of the starting point of molded line inside periphery.Need Illustrating, inside periphery, exhibition angle angle at the end point of molded line is also the exhibition angle angle outside periphery at the end point of molded line Equal.

Further, inside above-mentioned periphery there is angle α in the circle involute of molded line₂More than the circle involute of molded line outside periphery There is angle α₁, and outside the base radius R of circle involute, periphery there is angle α in the circle involute of molded line₁, the circle of molded line inside periphery There is angle α in involute₂With meet claimed below for revolution-radius ξ:

R[π-(α₂-α₁)]=2 ξ.

Referring again to Fig. 2, outside above-mentioned center, the end point of molded line overlaps, the most all with the starting point of molded line outside above-mentioned periphery For a B；The end point of above-mentioned center inside molded line overlaps with the starting point of molded line inside above-mentioned periphery, is i.e. an E.Specifically For:

${\mathrm{a\&theta;}}_1^{k}cos\left({\mathrm{\&theta;}}_1\right)-\mathrm{\&zeta;}cos\&lsqb;{\mathrm{\&theta;}}_1-arctan(k/{\mathrm{\&theta;}}_1)\&rsqb;=x_1\left({\mathrm{\&theta;}}_1\right)=x_3\left({\mathrm{\&theta;}}_4\right)-R\&lsqb;cos\left({\mathrm{\&theta;}}_4\right)+({\mathrm{\&theta;}}_4-{\mathrm{\&alpha;}}_1)\sin \left({\mathrm{\&theta;}}_4\right)\&rsqb;$

${\mathrm{a\&theta;}}_1^{k}sin\left({\mathrm{\&theta;}}_1\right)-\mathrm{\&zeta;}sin\&lsqb;{\mathrm{\&theta;}}_1-arctan(k/{\mathrm{\&theta;}}_1)\&rsqb;=y_1\left({\mathrm{\&theta;}}_1\right)=y_3\left({\mathrm{\&theta;}}_4\right)-R\&lsqb;sin\left({\mathrm{\&theta;}}_4\right)+({\mathrm{\&theta;}}_4-{\mathrm{\&alpha;}}_1)cos\left({\mathrm{\&theta;}}_4\right)\&rsqb;$

$-{\mathrm{a\&theta;}}_3^k\cos \left({\mathrm{\&theta;}}_3\right)-\mathrm{\&zeta;}-\cos \&lsqb;{\mathrm{\&theta;}}_3-\arctan (k/{\mathrm{\&theta;}}_3)\&rsqb;=x_2\left({\mathrm{\&theta;}}_3\right)=x_4\left({\mathrm{\&theta;}}_6\right)-R\&lsqb;\cos \left({\mathrm{\&theta;}}_6\right)+({\mathrm{\&theta;}}_6-{\mathrm{\&alpha;}}_2)\sin \left({\mathrm{\&theta;}}_6\right)\&rsqb;$

$-{\mathrm{a\&theta;}}_3^{k}sin\left({\mathrm{\&theta;}}_3\right)-\mathrm{\&zeta;}sin\&lsqb;{\mathrm{\&theta;}}_3-arctan(k/{\mathrm{\&theta;}}_3)\&rsqb;=y_2\left({\mathrm{\&theta;}}_3\right)=y_4\left({\mathrm{\&theta;}}_6\right)-R\&lsqb;sin\left({\mathrm{\&theta;}}_6\right)+({\mathrm{\&theta;}}_6-{\mathrm{\&alpha;}}_2)cos\left({\mathrm{\&theta;}}_6\right)\&rsqb;$

The equation met from each molded line of above-mentioned scroll wrap, in the molded line of scroll wrap, central segment molded line is formed The wall thickness of scroll wrap tapered into outer rim by center, therefore the wall thickness of scroll wrap center is maximum, whirlpool the most herein The intensity of rotation tooth is the highest, thus avoids scroll wrap and damage scroll plate because mutual collision deforms upon.It addition, periphery segment type line The wall thickness of the scroll wrap formed is equal, thus reduces difficulty of processing.

Owing to the flute profile line of the flute profile line of scroll wrap of motion vortex dish and the scroll wrap of fixed scroll differs 180 °, because of The tooth Profile Design of this scroll wrap based on above-mentioned motion vortex dish, it is possible to obtain the flute profile line of the scroll wrap of fixed scroll. Specifically, the flute profile line of the scroll plate of this fixed scroll also includes central segment and periphery section as shown in Figure 3.Wherein central segment tooth Molded line includes again molded line GH section outside center, center inside molded line JK section.Outside this center, molded line GH section meets below equation:

$\begin{array}{cc}\begin{array}{c}{x}_5\left(\mathrm{\&phi;}\right)={\mathrm{a\&phi;}}^k\cos \left(\mathrm{\&phi;}\right)-\mathrm{\&xi;}\cos \&lsqb;\mathrm{\&phi;}-\arctan (k/\mathrm{\&phi;})\&rsqb;\\ y_5\left(\mathrm{\&phi;}\right)={\mathrm{a\&phi;}}^k\sin \left(\mathrm{\&phi;}\right)-\mathrm{\&xi;}\sin \&lsqb;\mathrm{\&phi;}-\arctan (k/\mathrm{\&phi;})\&rsqb;\end{array}& ({\mathrm{\&theta;}}_7\&le;\mathrm{\&phi;}\&le;{\mathrm{\&theta;}}_8)\end{array}$

Described center inside molded line meets:

$\begin{array}{cc}\begin{array}{c}{x}_6\left(\mathrm{\&phi;}\right)=-{\mathrm{a\&phi;}}^k\cos \left(\mathrm{\&phi;}\right)-\mathrm{\&xi;}\cos \&lsqb;\mathrm{\&phi;}-\arctan (k/\mathrm{\&phi;})\&rsqb;\\ y_6\left(\mathrm{\&phi;}\right)=-{\mathrm{a\&phi;}}^k\sin \left(\mathrm{\&phi;}\right)-\mathrm{\&xi;}\sin \&lsqb;\mathrm{\&phi;}-\arctan (k/\mathrm{\&phi;})\&rsqb;\end{array}& ({\mathrm{\&theta;}}_9\&le;\mathrm{\&phi;}\&le;{\mathrm{\&theta;}}_{10})\end{array}$

Wherein, a is spiral of Archimedes coefficient；φ is angle parameter；K is spiral of Archimedes index；ξ is revolution Radius；θ₇The exhibition angle angle of the starting point of molded line outside centered by；θ₈Centered by outside molded line end point at angle, exhibition angle Degree；θ₉The exhibition angle angle of the starting point of molded line inside centered by；θ₁₀Centered by inner side molded line end point at exhibition angle angle.

Above-mentioned periphery section flute profile line includes again outside periphery molded line KL section outside molded line HI section, periphery.This periphery lateral Line meets:

$\begin{array}{cc}\begin{array}{c}{x}_7\left(\mathrm{\&phi;}\right)=R\&lsqb;\cos \left(\mathrm{\&phi;}\right)+(\mathrm{\&phi;}-{\mathrm{\&alpha;}}_1)\sin \left(\mathrm{\&phi;}\right)\&rsqb;\\ y_7\left(\mathrm{\&phi;}\right)=R\&lsqb;\sin \left(\mathrm{\&phi;}\right)+(\mathrm{\&phi;}-{\mathrm{\&alpha;}}_1)\cos \left(\mathrm{\&phi;}\right)\&rsqb;\end{array}& ({\mathrm{\&theta;}}_{11}\&le;\mathrm{\&phi;}\&le;{\mathrm{\&theta;}}_{12})\end{array}$

Inside described periphery, molded line meets:

$\begin{array}{cc}\begin{array}{c}{x}_8\left(\mathrm{\&phi;}\right)=R\&lsqb;\cos \left(\mathrm{\&phi;}\right)+(\mathrm{\&phi;}-{\mathrm{\&alpha;}}_2)\sin \left(\mathrm{\&phi;}\right)\&rsqb;\\ y_8\left(\mathrm{\&phi;}\right)=R\&lsqb;\sin \left(\mathrm{\&phi;}\right)+(\mathrm{\&phi;}-{\mathrm{\&alpha;}}_2)\cos \left(\mathrm{\&phi;}\right)\&rsqb;\end{array}& ({\mathrm{\&theta;}}_{13}\&le;\mathrm{\&phi;}\&le;{\mathrm{\&theta;}}_{12})\end{array}$

Wherein, R is the base radius of circle involute；φ is angle parameter；α₁Send out for the circle involute of molded line outside periphery The male character types in Chinese operas, usu. referring tov the bearded character；α₂Angle is there is for the circle involute of molded line inside periphery；θ₁₁For the exhibition angle angle of the starting point of molded line outside periphery；θ₁₂ For the exhibition angle angle at the end point of molded line outside periphery；θ₁₃For the exhibition angle angle of the starting point of molded line inside periphery.Need Illustrating, inside periphery, exhibition angle angle at the end point of molded line is also the exhibition angle angle outside periphery at the end point of molded line Equal.

Refer again to Fig. 3, the end point of molded line and the periphery of above-mentioned fixed scroll outside the center of above-mentioned fixed scroll The starting point of outside molded line overlaps, and is i.e. a H；The end point of the center inside molded line of above-mentioned fixed scroll is fixing with above-mentioned Inside the periphery of scroll plate, the starting point of molded line overlaps, and is i.e. a K.Particularly as follows:

${\mathrm{a\&theta;}}_8^{k}cos\left({\mathrm{\&theta;}}_8\right)-\mathrm{\&zeta;}cos\&lsqb;{\mathrm{\&theta;}}_8-arctan(k/{\mathrm{\&theta;}}_8)\&rsqb;=x_5\left({\mathrm{\&theta;}}_8\right)=x_7\left({\mathrm{\&theta;}}_{11}\right)-R\&lsqb;cos\left({\mathrm{\&theta;}}_{11}\right)+({\mathrm{\&theta;}}_{11}-{\mathrm{\&alpha;}}_1)sin\left({\mathrm{\&theta;}}_{11}\right)\&rsqb;$

${\mathrm{a\&theta;}}_8^k\sin \left({\mathrm{\&theta;}}_8\right)-\mathrm{\&zeta;}\sin \&lsqb;{\mathrm{\&theta;}}_8-arctan(k/{\mathrm{\&theta;}}_8)\&rsqb;=y_5\left({\mathrm{\&theta;}}_8\right)=y_7\left({\mathrm{\&theta;}}_{11}\right)-R\&lsqb;\sin \left({\mathrm{\&theta;}}_{11}\right)+({\mathrm{\&theta;}}_{11}-{\mathrm{\&alpha;}}_1)\cos \left({\mathrm{\&theta;}}_{11}\right)\&rsqb;$

$-{\mathrm{a\&theta;}}_9^{k}cos\left({\mathrm{\&theta;}}_9\right)-\mathrm{\&zeta;}cos\&lsqb;{\mathrm{\&theta;}}_9-arctan(k/{\mathrm{\&theta;}}_9)\&rsqb;=x_6\left({\mathrm{\&theta;}}_9\right)=x_8\left({\mathrm{\&theta;}}_{13}\right)-R\&lsqb;cos\left({\mathrm{\&theta;}}_{13}\right)+({\mathrm{\&theta;}}_{13}-{\mathrm{\&alpha;}}_2)sin\left({\mathrm{\&theta;}}_{13}\right)\&rsqb;$

$-{\mathrm{a\&theta;}}_9^k\sin \left({\mathrm{\&theta;}}_9\right)-\mathrm{\&zeta;}\sin \&lsqb;{\mathrm{\&theta;}}_9-arctan(k/{\mathrm{\&theta;}}_9)\&rsqb;=y_6\left({\mathrm{\&theta;}}_9\right)=y_8\left({\mathrm{\&theta;}}_{13}\right)-R\&lsqb;\sin \left({\mathrm{\&theta;}}_{13}\right)+({\mathrm{\&theta;}}_{13}-{\mathrm{\&alpha;}}_2)\cos \left({\mathrm{\&theta;}}_{13}\right)\&rsqb;$

As shown in Figure 4, the screw compressor of the embodiment of the present invention will include above-mentioned motion vortex dish and fixed scroll, And the scroll wrap of motion vortex dish flute profile line as in figure 2 it is shown, fixed scroll scroll wrap flute profile line as shown in Figure 3.? In the running of screw compressor, motion vortex dish is relatively fixed scroll plate and moves in parallel, and the scroll wrap of motion vortex dish And form contact-impact between the scroll wrap of fixed scroll.Owing to the thickness of the center of scroll plate is strengthened, and motion whirlpool Back lash between capstan and fixed scroll is constant, thus decreases the internal leakage between scroll plate, it is ensured that scroll compression Machine overall performance.

These are only preferred embodiment of the present utility model, not thereby limit the scope of the claims of the present utility model, every Utilize equivalent structure or equivalence flow process conversion that this utility model description and accompanying drawing content made, or be directly or indirectly used in Other relevant technical fields, are the most in like manner included in scope of patent protection of the present utility model.

Claims (9)

1. a scroll plate for screw compressor, including disk body, the scroll wrap that is arranged on described disk body；It is characterized in that, institute The flute profile line stating scroll wrap includes being positioned at the central segment of described disk body center and being positioned at the periphery section of disc perimeter, Er Qiesuo The wall thickness of the scroll wrap stating the wall ratio periphery section of the scroll wrap of central segment is big；The wall thickness of the scroll wrap of described periphery section is equal.

2. scroll plate as claimed in claim 1, it is characterised in that the wall thickness of the scroll wrap of described central segment is from described disk body Center tapers into outer rim.

3. scroll plate as claimed in claim 1 or 2, it is characterised in that described central segment is spiral of Archimedes, described week Limit section is circle involute.

4. scroll plate as claimed in claim 3, it is characterised in that described central segment includes molded line and center inside outside center Outside molded line, and described center, molded line meets:

Described center inside molded line meets:

Wherein, a is spiral of Archimedes coefficient；φ is angle parameter；K is spiral of Archimedes index；ξ is revolution half Footpath；θ₀The exhibition angle angle of the starting point of molded line outside centered by；θ₁Centered by outside molded line end point at exhibition angle angle； θ₂The exhibition angle angle of the starting point of molded line inside centered by；θ₃Centered by inner side molded line end point at exhibition angle angle.

5. scroll plate as claimed in claim 4, it is characterised in that described spiral of Archimedes index k < 1.

6. scroll plate as claimed in claim 3, it is characterised in that described periphery section includes outside periphery inside molded line and periphery Outside molded line, and described periphery, molded line meets:

Inside described periphery, molded line meets:

Wherein, R is the base radius of circle involute；φ is angle parameter；α₁Angle is there is for the circle involute of molded line outside periphery； α₂Angle is there is for the circle involute of molded line inside periphery；θ₄For the exhibition angle angle of the starting point of molded line outside periphery；θ₅For periphery Exhibition angle angle at the end point of outside molded line；θ₆For the exhibition angle angle of the starting point of molded line inside periphery.

7. scroll plate as claimed in claim 6, it is characterised in that inside described periphery, the circle involute of molded line occurs angle α₂Greatly There is angle α in the circle involute of molded line outside periphery₁, and R [π-(α₂-α₁)]=2 ξ.

8. scroll plate as claimed in claim 1, it is characterised in that described scroll plate is motion vortex dish or fixed scroll Dish.

9. a screw compressor, it is characterised in that described screw compressor includes motion vortex dish and fixed scroll, described Motion vortex dish and fixed scroll are the scroll plate as described in any one of claim 1-8, and described motion vortex dish Flute profile line is staggered 180 ° with the flute profile line of fixed scroll.