CN1163990A - Scroll fluid discharging apparatus - Google Patents

Abstract

In a scroll fluid discharging apparatus including a stationary scroll and a revolving scroll, each of the mutually engaging laps and of these scrolls and each has a first lap portion without a tip seal in contact with the mirror-finished opposed scroll surface, thus providing an empty tip seal groove space, the first lap portion covering a predetermined lap length from the edge of the lap on the peripheral side thereof toward the central side. Each of the mutually engaging laps of the scroll also has a second lap portion with a tip seal in contact with the mirror-finished opposed scroll surface, the second lap portion having the remaining lap range from the first lap portion being neighboring each other up to the central side lap edge. Compressed fluid is discharged under a higher discharge pressure than in the prior art with the same drive motor rating and at the same motor rpm as in the prior art.

Description

Scroll fluid discharging apparatus

The present invention relates to scroll fluid discharging apparatus, it is emitted in the seal space fluid by compression, and the sealing space is bonded with each other, and is in that the vortex rim roll of predetermined deviation angle forms.Seal space reduces gradually when the discharge orifice that is provided with from the inlet hole one side direction center that is provided with on every side moves.

In common vortex mechanism, seal space is formed by the vortex rim roll.For fluid sealability that keeps seal space and the durability that guarantees the vortex rim roll, make by self lubricating material, tip seals 31B as shown in figure 11 be assemblied in end seal groove 13a (or 21a) that the end of the rim roll 13 (or 21) of stationary scroll 10 (or running vortex 20) forms (Fig. 2) in, therefore, rim roll 13 (or 21) is by relative vortex surface 10a (or 20a) rubbing contact of tip seals 31B with mirror finishing.

This vortex mechanism is applicable to scroll fluid discharging apparatus shown in Figure 2.

Vortex exhaust apparatus shown in Figure 2 comprises a stationary scroll 10 and a running vortex 20.Stationary scroll has a rim roll 13, and it forms in the hollow space 12 that its perisporium 11 surrounds.Running vortex 20 has a rim roll 21 that engages with stationary scroll rim roll 13.Running vortex 20 turns round with respect to the stationary scroll 10 of not rotating, thereby the seal space that forms between rim roll 13 and 21 is compressed gradually, and the discharge orifice that seal space equipment center setting from inlet hole one side direction that is provided with on every side advances.

Running vortex 20 around the running of the center of stationary scroll rim roll 13, advances the point of contact between the rim roll 13 and 21 that forms seal space with fixing turning radius gradually to equipment center, seal space plays pressing chamber.When fluid sucked by inlet hole 16, it was brought at two rim rolls 13 and the 21 last seal spacies that form by the outer end portion guiding along rim roll 21.Because the running of running vortex 20, along with the propelling of seal space to equipment center, its volume reduces gradually, thereby the fluid in it is brought in compression into.Seal space 22 is communicated with discharge orifice 17 at last, thereby compressed fluid is discharged.

In the said equipment, in order to improve compression efficiency, assurance is crucial by the reliable sealing state of the seal space that rim roll 13 and 21 forms.

Therefore, the tip seals 31B that self lubricating material is made is assemblied in the top of every rim roll, makes itself and relative rim roll slidingsurface, i.e. the relative vortex body rubbing contact of mirror finishing, as shown in figure 11.

As shown in Figure 2, involute rim roll 13 (or 21) is arranged on the vortex surface 10a (or 20a) of mirror finishing of stationary scroll 10 (or running vortex 20), tip seals 31B is assemblied among the end seal groove 13a (or 21a), and the end seal groove is at rim roll 13) or 21 (end form and divide from central division around vortex and extend.

As shown in Figure 2, the annular seal 32 that the sealing material of selflubricating is made is assemblied in the groove that is covered with dust that forms on the vortex body of stationary scroll 10, that is, in the circular hollow groove, the vortex body of stationary scroll 10 contacts with the vortex body of the running vortex 20 that is arranged in hollow space 12.32 the effect of being covered with dust is the tightness that keeps between the hollow space 12 and the external world, prevents to suck ambient air and grit.

Scroll fluid discharging apparatus with said structure is used in 8kgf/cm ²The following discharging compressed fluid of pressure.

But, require 10kgf/cm at present ²Above discharge pressure.

In order to address that need, that is, identical around vortex mechanism initial suction speed and under identical rpm, improve discharge pressure, further compressed fluid in the compression final state pressing chamber and the fluid that sucks thereafter.This will increase load, causes excessive driving power, and requires to increase the rated power of vortex mechanism drive motor, thereby cost is increased.

In addition, increase discharge pressure by under the situation of identical motor rated power, reducing the vortex revolutions per minute, can cause reducing with the direct-connected cooling fan revolutions per minute of vortex live axle, thereby cause the cooling deficiency of the convection cell heat of compression, this will reduce durability.

At the drive motor that uses rated power same as the prior art and under the situation of motor revolutions per minute same as the prior art, in order to increase discharge pressure, the method that can expect is to reduce the number of turn of rim roll.But, reduce the rim roll number of turn and can increase the pressure reduction between the seal space of periphery and interior all sides, thereby increase leakage, and significantly reduce air feed speed to the equipment center part from interior all side direction outer circumferential sides.

Thereby the purpose of this invention is to provide a kind of scroll fluid discharging apparatus, it can use the motor of rated power same as the prior art and adopt simple structure to increase the discharge pressure of pressurized gas.

Another object of the present invention provides a kind of scroll fluid discharging apparatus, and it can increase the pressure of pressurized gas and not increase cost.

According to a feature of the present invention, a kind of scroll fluid discharging apparatus is included in a plurality of vortexs that have corresponding rim roll on the vortex body, one inlet hole is provided with around, be used to suck fluid, one discharge orifice is provided with at the center, be used for exhaust fluid, fluid is pressurized in seal space, seal space is by driving the end of above-mentioned vortex rim roll to be formed with the relative sealing vortex surface contact of mirror finishing by tip seals, seal space is along with from the propelling of inlet hole one lateral row discharge hole and volume reduces with exhaust fluid, the vortex rim roll that is bonded with each other has the first rim roll part of the tip seals that terminal and the relative vortex surface of mirror finishing contacts respectively thereon, thereby from rim roll at the edge of its ambient side in a prespecified range of central side, form the part of a sky endways in the seal groove part, and do not consider the compression of fluid, and one second rim roll part, have the tip seals in the seal groove endways on it, have the residue rim roll scope adjacent with the first rim roll part, it extends towards rim roll central side edge, with the relative vortex surface contact of mirror finishing.

According to illustrated the present invention, the vortex rim roll that each is bonded with each other have one not with the part of the tip seals of the relative vortex surface contact of mirror finishing, this part covers from rim roll at the edge of its ambient side towards one of central side predetermined rim roll length, and the fluid that flows into equipment shown in arrow 51T among Fig. 8 (E) is entrained among the T1 of space so that finally be sealed as shown in Fig. 8 (F).Shown in Fig. 8 (H),, the space finishes carrying secretly of fluid thereby being sealed at last.Then, sealed space becomes the space T4 shown in Fig. 7 (A), thereby begins to compress the fluid of being carried secretly.Since stationary scroll rim roll 13 comprise from the edge of rim roll ambient side to tip seals at the edge of same side, the first rim roll part that does not have tip seals 31A, and have and the second rim roll partial L 02 of the surperficial contact of the relative vortex of mirror finishing with the formation seal space, when space T4 as Fig. 7 (B) when being compressed shown in 7 (D), fluid leaks by gap M (Fig. 6 (a)) or the G (Fig. 6 (b)) between the surface of the mirror finishing of the terminal of rim roll 13 and running vortex 20, shown in arrow 54T.

In the situation of Fig. 6 (a), fluid can pass through rim roll 13 ' terminal and running vortex 20 ' the mirror finishing surface between the gap flow to the right, that is to say, from the high pressure side leakage on the left side low voltage side of face to the right.

According to the present invention, the empty tip seal groove space among the first rim roll partial L F1 and the LO1 can be received in the elongated portion of the tip seals on the rim roll length direction.

In the situation of Fig. 6 (b), the fluid that high pressure side by the clearance G between the mirror finishing apparent surface of the terminal of rim roll 13 and running vortex 20 enters the empty tip seal groove space among the first rim roll partial L F1 of rim roll 13 leaks to low voltage side by another clearance G between rim roll end and the mirror finishing surface.In the situation of Fig. 6 (c) about the scroll fluid discharging apparatus that do not have the end seal groove, fluid by rim roll end 13 ' and vortex mirror finishing surface 20 ' between be of a size of N gap M leak.In the situation that is provided with the empty tip seal groove space of Fig. 6 (b), to compare with the situation of Fig. 6 (a), fluid flows among the end seal groove 13a by the left side small gap of high pressure easily, and easily the right side small gap by low pressure spills then.Can spill relatively large fluid in this case.

In addition, the compressed fluid that flows into the empty tip seal groove space vertically along concentrated flow to the groove end, thereby easily floor drain to the ambient side of rim roll.

Space T4 shown in Fig. 8 (A) becomes space T5 (Fig. 8 (B)) continuously to T7 (Fig. 8 D), becomes then by the second rim roll partial L O2 to form the seal space T8 shown in Fig. 8 (E).

In other words, be entrained in the fluid among the seal space T8, compared by the situation that tip seals occupies with the empty tip seal groove space of the first rim roll partial L O1, the most less.

Seal space T8 is being gradually reduced into the space T24 shown in Fig. 8 (E) before with discharge orifice 17 connections (Fig. 8 (F)).

When the hydrodynamic pressure in the discharge orifice 17 is higher than hydrodynamic pressure among the space T25 (Fig. 8 (F)), the fluid reflux in the discharge orifice 17 in the T25 of space, and the fluid in the T25 of space press small volume to T27 (Fig. 8 (H)) to T29 (Fig. 7 (B)).When the hydrodynamic pressure in the discharge orifice 17 was exceeded, compressed fluid was discharged by discharge orifice.

Because the Fluid Volume of being carried secretly is less than the situation that tip seals occupies the empty tip seal groove space among the first rim roll partial L O1, so fluid is compressed to predetermined pressure than discharge pressure is increased to 8kgf/cm ²The time that is spent is longer.But, because following simple structure is provided with the empty tip seal groove space in the rim roll end portion adjacent to the edge of the ambient side of rim roll, promptly, the empty tip seal groove space of suction side is set and does not consider the compression of fluid, thereby might under the situation of drive motor rated power same as the prior art and identical motor revolutions per minute, under the discharge pressure higher, discharge compressed fluid than prior art.

Owing in first rim roll part, be provided with the empty tip seal groove space, thus might with the 8kgf/cm of prior art ²Situation design the size of static and running vortex, the moving commentaries on classics radius etc. of running vortex the samely, under the situation of drive motor rated power same as the prior art, improve the discharge pressure of compressed fluid.

In addition, need not to reduce the motor rpm, thereby can make cooling fan realize enough cooling effects, and can use motor same as the prior art.

First rim roll part can suitably cover 125 to 290mm the rim roll length of starting at from the edge of the ambient side of rim roll.If the length of first rim roll of counting from the ambient side edge of rim roll part is represented by Sg, represent by Sa from the length of first rim roll part at the ambient side edge of the rim roll of central side edge to the first rim roll part of tip seals, so Sg/Sa=0.15～0.35.

Because said structure, as shown in figure 10, can increase the compressed fluid discharge pressure and need not to change the rated power of vortex mechanism drive motor.

According to the present invention, on vortex body, form corresponding a plurality of vortexs that have rim roll, assembly end Sealing in the end seal groove that can also in the end of every rim roll, form, it is contacted with the relative vortex surface friction of mirror finishing, and tip seals is fixed in rim roll in the discharge orifice side of center-side by jut 13e and 21e.

Shown in Fig. 4 (b), tip seals 31A heart end therein is fixed on the rim roll 13 of stationary scroll 10 by jut 13e, and jut 13e is arranged on the sidewall surfaces of end seal groove 13a.In addition, tip seals 31A ' therein heart end by the jut 21e on the sidewall surfaces that is arranged on end seal groove 21a be fixed on the running vortex 20 rim roll 21 on.Because tip seals is fixed therein heart end by jut 13e and 21e, promptly rise to a side of high temperature at work especially, thereby might eliminate and bear at work because of the flexible tip seals of temperature variation heat owing to extend through the possibility that deviate from rim roll ambient side end from its groove.

Brief description of drawings.

Fig. 1 is illustrated in the relation between the tip seals and vortex rim roll in the basic structure of the present invention;

Fig. 2 is the sectional view according to an embodiment of scroll fluid discharging apparatus of the present invention;

Fig. 3 (a) and 3 (b) expression are according to the key component of vortex mechanism of the present invention, and Fig. 3 (a) is a side view, and Fig. 3 (b) is the sectional view along A-A line among Fig. 3 (a);

Fig. 4 (a) and 4 (b) mainly represent the end of end seal groove and tip seals, and Fig. 4 (a) is a planimetric map, and Fig. 4 (b) is the amplification view of portion C in the presentation graphs 4 (a);

Fig. 5 is the sectional view along B-B line among Fig. 4 (b);

Fig. 6 (a) and 6 (b) are used to illustrate the escape of liquid by the rim roll gap;

Fig. 7 (A) schematically represents the function of vortex mechanism of the present invention to 7 (D);

Fig. 8 (E) schematically represents the function of vortex mechanism of the present invention to 8 (H);

Fig. 9 is the plotted curve that concerns between expression discharge pressure and the empty tip seal groove space length;

Figure 10 is the plotted curve that concerns between expression discharge pressure and the empty tip seal groove space length;

Figure 11 represents the relation between the tip seals and vortex rim roll in the relevant technologies.

Now contrast accompanying drawing and describe the present invention in conjunction with the embodiments in detail.Unless special explanation is arranged in addition, the size described in the embodiment, material, shape, relative position etc. do not limit meaning of the present invention, and just are used for explanation.

Fig. 1 represents the relation between the tip seals and vortex rim roll in the basic structure of the present invention.Fig. 2 is the sectional view according to the embodiment of scroll fluid discharging apparatus of the present invention.

As shown in Figure 2, scroll fluid discharging apparatus comprises a stationary scroll 10, a running vortex 20 and a framework 40.Stationary scroll 10 is fixed on the framework 40, and running vortex 20 can be bearing in the framework 40 with turning round.

Stationary scroll 10 has a perisporium 11, it is fixed on the end face of framework 40, and have an inlet hole 16, an involute shape rim roll 13 that forms in the hollow space 12 that perisporium 11 limits, and one be provided with at the center substantially, is used to discharge the discharge orifice 17 of compressed fluid.

Running vortex 20 is contained in the hollow space that is limited by framework 40, and has a rim roll 21, and the rim roll 13 of it and stationary scroll 10 has essentially identical involute shape.Rim roll 21 forms on a surface of the plate-like part that contacts with above-mentioned perisporium 1. Rim roll 13 and 21 is bonded with each other.

Vortex 10 and 20 has the cooling fin 33 and 23 that forms on its back side, by its inside of air cooling.

A kind of selflubricating sealing material, tip seals 31A as shown in Figure 1 or tip seals 31B shown in Figure 11 are assemblied in the end seal groove that forms in the end of every vortex rim roll 13 and 21, and with relative vortex rubbing contact.Therefore, rim roll 13 and 21 can slide on unlubricated oil ground mutually.Ring-type against a selflubricating Sealing is covered with dust and 32 is assemblied in the groove that is covered with dust that forms in stationary scroll perisporium 11 and the end face that mirror finishing surface running vortex 20 contacts.32 fluid sealabilities that keep the seal space that formed by rim roll 13 and 21 that are covered with dust prevent to suck ambient air and grit.

Framework 40 supportings one end is equipped with the coaxial active bent axle 41 of a belt pulley 42, also supports three from dynamic crankshaft 43, and they are around active bent axle 41 (3 part) centering, and 120 degree of being separated by are provided with at interval.

So that rotate, supporting shell 25 is linked as integral body with running vortex 20 to bent axle 41 and 43 by 25 supportings of running vortex supporting shell.Because the initiatively rotation of bent axle 41 though running vortex 20 does not rotate, around the rim roll center of stationary scroll 10, is turned round with fixing running radius.

Extend from inlet hole 16 by 4, fluid sucks from the system's (not shown) that is connected in passage 4 the other ends with the direction of arrow 50.

Fig. 3 (a) expression is according to the key component of vortex mechanism of the present invention, and Fig. 3 (b) is the sectional view along A-A line among Fig. 3 (a).

Shown in Fig. 3 (a), the rim roll 13 of stationary scroll 10 is included in the first rim roll partial L F1 of no tip seals among the above-mentioned end seal groove 13a, and the second rim roll partial L F2 that is equipped with tip seals endways among the seal groove 13a.Equally, the rim roll 21 of running vortex 20 is included in the first rim roll partial L O1 of no tip seals in the end seal groove (not shown) and the second rim roll partial L O2 of tip seals is housed among the seal groove 21a endways.

The end of Fig. 4 (a) expression end seal groove and tip seals.Fig. 4 (b) is the zoomed-in view of portion C among Fig. 4 (a).Fig. 5 is the sectional view along B-B line among Fig. 4 (b).

Now consult above-mentioned accompanying drawing, tip seals 31A heart end therein is fixed on the rim roll 13 of stationary scroll 10 by jut 13e, and jut 13e is arranged on the side wall surface of end seal groove 13a.

In addition, tip seals 13A ' therein heart end by the jut 21e on the side wall surface that is located at end seal groove 21a be fixed on the running vortex 20 rim roll 21 on.

Since tip seals by jut 13e and 21e therein heart end fix, center-side is in discharge orifice one side that rises to high temperature at work, thereby can eliminate following possibility, that is, because of the flexible tip seals of temperature variation heat in the work since extend through rim roll around end deviate from from its groove.

According to the present invention, the vortex rim roll that is bonded with each other respectively has the part of a no tip seals, the end of vortex rim roll contacts with the relative vortex surface of mirror finishing, this part covers predetermined rim roll length from the edge of rim roll ambient side towards central side, shown in Fig. 6 (a), make fluid can by rim roll 13 ' terminal and relatively the gap between the mirror finishing surface flow through to the right, that is, and from the high pressure side leakage on the left side low voltage side of face to the right.

Empty tip seal groove space in the first above-mentioned rim roll partial L O1 may be received in the elongated portion of the tip seals on the coiling length direction, and this can increase the leakage of fluid.Shown in Fig. 6 (b), do not have tip seals to occupy the empty tip seal groove, the fluid that end and the clearance G between the mirror finishing surface by rim roll 13 enters the end seal groove leaks to low voltage side by another gap between rim roll end and mirror finishing surface from high pressure side (left side).

Be provided with the situation of Fig. 6 (b) of empty tip seal groove space, with fluid by rim roll 13 ' and vortex 20 ' between the gap M situation of leaking compare, the logical easily high pressure side of fluid small gap flows into top seal groove 13a, spills by the low voltage side small gap then.Can leak relatively large fluid in this case.

In addition, the fluid that enters the empty tip seal groove space vertically along concentrated flow to the groove end, thereby easily floor drain to the ambient side of rim roll.

Fig. 7 (A) to 7 (D) and Fig. 8 (E) to 8 (H) common expression according to the vortex function of vortex function of the present invention and relevant prior art.Above-mentioned accompanying drawing represents by stationary scroll 10 with around the position and the shape in the space that the running vortex 20 of its running constitutes, and the runnings of 360 degree of running vortex 20 are divided into 8 equal parts.Continuous position from position shown in Fig. 7 (A) to position shown in Fig. 8 (H) occupies a circulation.

At first contrast Fig. 7 (A) describes relevant prior art to 8 (H) vortex function.As shown in figure 11, tip seals 31B occupies the edge that end seal groove 13a (21a) in the rim roll 13 (20) of vortex mechanism 1 reaches the rim roll ambient side always.In this case, during vortex mechanism 1 work, the fluid that sucks from the ambient side of vortex mechanism 1 is gradually reduced when it is directed to central side and by discharge orifice shown in Figure 2 17 discharges.

Because the running of the rim roll of running vortex 20, sucked by the opening 34 that is communicated with inlet hole 16 shown in Figure 2, fluid in the space S 1 shown in Fig. 8 (F) is depressed into the space S 2 of Fig. 8 (G), and along with volume reduce gradually be advanced into the S24 of Fig. 8 (E) with the space from the S3 of Fig. 8 (H), be advanced into the S25 of Fig. 8 (F) again and be compressed.

Running vortex 20 remains in operation, and makes the space S 25 shown in Fig. 8 (F) become the space S 26 shown in Fig. 8 (G), and separate with the opposite flank of the rim roll of stationary scroll 10 the rim roll end 57 of running vortex 20, thereby space 8G is communicated with discharge orifice 17.

At this moment, the fluid by opening 35 suction space T1 just discharges from space T26 shown in Fig. 8 (G), and the fluid in the space S 26 is discharged as fluid subsequently.

Because the running of running vortex 20, space S reduces volume gradually to S27 (Fig. 8 (H)), S28 (Fig. 7 (A)), and S29 (Fig. 7 (B)) and S30 (Fig. 7 (C)), the discharging of fluid ends at the position shown in Fig. 7 (C) among the T of space.

Then, the discharging of fluid ends at the position shown in Fig. 7 (D) in the space S.

In the above-mentioned work of vortex mechanism, compressed fluid is at 8kgf/cm ²Discharge pressure under be discharged from.

, the vortex function is described now at tip seals 31A shown in Figure 1 pack into every rim roll 13 of vortex mechanism and 21 situation.

Fig. 3 represents that tip seals is assemblied in the rim roll 13.In mode shown in Figure 3, tip seals 31A is assemblied among every the end seal groove 13a and 21a of rim roll 13 and 21.As shown in the figure, rim roll 13 comprises one the first rim roll partial L F1 and the second rim roll partial L F2, the first rim roll partial L F1 is occupied with the surperficial tip seals 31A that contacts and form clearance G between the relative vortex surface of rim roll end and mirror finishing of the relative vortex of mirror finishing, the first rim roll part FL1 covers the rim roll length from the ambient side edge 31Aa of tip seals 31A to the ambient side lateral edges 13b of rim roll 13, the second rim roll partial L F2 is occupied by tip seals 31A in the seal groove endways, and second rim roll partly covers from all the other rim roll length at central side edge to the central side edge of rim roll of the first rim roll partial L F1.

Because said structure, shown in arrow 51T among Fig. 8 (E), the fluid result who flows into equipment is brought into space T1 shown in Fig. 8 (F), so that be sealed at last.This space is sealed to finish carrying secretly of fluid shown in Fig. 8 (H) at last.Seal space becomes the space T4 shown in Fig. 7 (A) then, thereby the fluid of being carried secretly begins to be compressed.Because stationary scroll rim roll 13 comprises the first rim roll partial L O1 that does not have tip seals 31A, the seal edge 31Aa of its rim roll on from the ambient side edge of rim roll to same side, and second rim roll partial L O2 have the tip seals 31A that contacts with the mirror finishing surface friction of stationary scroll 20 to form seal space, thereby fluid by rim roll 13 end and the clearance G between the static rim roll surface of mirror finishing leak, shown in arrow T54, also leak to the ambient side of rim roll simultaneously, shown in Fig. 4 (a) by the empty tip seal groove space.

Space T4 becomes space T5 (Fig. 7 (B)) continuously, becomes T7 (Fig. 7 (D)), is the space T8 (Fig. 8 (E)) that is formed by the second rim roll partial L O2 then.

Empty tip seal groove space at the first rim roll partial L O1 is occupied the place by tip seals, and less fluid is entrained among the seal space T8.

When the space that volume reduces gradually became space T25 (Fig. 8 (F)), it was communicated with discharge orifice 17.

When the hydrodynamic pressure among the T25 of space is higher than hydrodynamic pressure in the discharge orifice, fluid reflux in the discharge orifice is gone among the T25 of space, and when space T25 becomes space T26 (figure (G)) and T29 (Figure 27 (B)) continuously, be compressed with previous fluid in the T25 of space.During this period, when the pressure in the discharge orifice was exceeded, compressed fluid was promptly discharged by discharge orifice.

Simultaneously, the fluid in inhalation device as described in the arrow 51S among Fig. 8 (E) is entrained in the space S 1 shown in Fig. 8 (F).The carrying secretly of fluid becomes space shown in Fig. 8 (H) until the space and just finishes.When the space became space S 4 shown in Fig. 7 (A), fluid began to be compressed.Because stationary end circumvolution edge 21 comprises the first rim roll partial L F1 that does not have tip seals 31A, its tip seals edge 31Aa from the ambient side edge 13b of rim roll to same side, and second rim roll partial L F2 have tip seals 31A, its mirror finishing surface friction with running vortex 20 contacts to form seal space, thereby when the space as Fig. 7 (B) when volume shown in 7 (D) reduces gradually, fluid by rim roll 21 end and the clearance G between the mirror finishing surface of stationary scroll 10 leak, shown in arrow 54S, simultaneously also by the ambient side of empty tip seal groove space leakage, shown in Fig. 4 (a) to rim roll.

Space S 4 becomes space S 5 (Fig. 7 (B)) continuously.S7 (Fig. 7 (D)) becomes the space S 8 (Fig. 8 (E)) that is formed by the second rim roll partial L F2 then.

Empty tip seal groove space at the first rim roll partial L F1 is occupied the place by tip seals, and less fluid is entrained among the seal space S8.

When the space S 8 that reduces gradually when volume became space S 25 (Fig. 8 (F)), it was communicated with discharge orifice 17, shown in Fig. 8 (G).

As previously mentioned, have the end seal place at the first rim roll partial L F1 (LO1), compare with the situation that does not form the end seal groove in the rim roll end, therefore less fluid carry-over, might make discharge pressure from 8kgf/cm in seal space S8 ²Increase to 10kgf/cm ²And do not form excessive drive motor torque.

When the hydrodynamic pressure in the discharge orifice is higher than hydrodynamic pressure in the space S 26, fluid reflux in the discharge orifice is to space S 26, and compressed with the fluid in space S 26 when space S 26 becomes space S 27 (Fig. 8 (H)) that volume reduces and S30 (Figure 30 (C)) continuously.When the hydrodynamic pressure in the discharge orifice was exceeded, compressed fluid was discharged by discharge orifice in this process.

Therefore might prevent to be higher than the fluid pressure action of needs in discharge orifice, thereby anti-stopping power power increases, and can be under drive motor rated power same as the prior art and identical motor revolutions per minute situation, discharge compressed fluid being higher than under the discharge pressure of prior art.

In addition, simple in structure, rim roll side around has a part that does not have tip seals, thereby with the situation that in the first rim roll partial L F1 (LO1), has tip seals, and do not have the situation of end seal groove to compare at the rim roll end, can reduce the Fluid Volume of carrying secretly, therefore, can under motor revolutions per minute situation same as the prior art, discharge compressed fluid down with the discharge pressure that is higher than prior art.

Owing to do not consider the fluid compression, be provided with the empty tip seal groove space at first rim roll end partly, thereby the compressed fluid discharge pressure is increased, and drive motor rated power is same as the prior art, and resemble 8kgf/cm ²The prior art situation design the size of stationary scroll and running vortex, the running radius etc. of running vortex the samely.

In addition, because the motor revolutions per minute do not reduce, thereby the revolutions per minute that is directly connected in the cooling fan of vortex live axle do not reduce, and therefore can obtain enough cooling effects.Therefore can use motor same as the prior art.

Though do not illustrate in the above-described embodiments, a safety check can be set in discharge orifice, this valve can be opened when reaching predetermined pressure.

As previously mentioned, in the above-described embodiments, rim roll 13 contacts with the relative vortex surface friction of mirror finishing by tip seals 31A respectively with LO2 with 20 the second rim roll partial L F2, does not have the first rim roll partial L F1 of tip seals and LO1 then to be respectively formed at gap between its rim roll end and the mirror finishing surface.

That is to say, cut the tip seals 31A that can obtain to be assemblied in after the part shown in Fig. 1 dotted line in the end seal groove.Therefore, in the first rim roll partial L O1 and LF1, between surperficial 13a of the relative vortex of its end and mirror finishing and 20a, form clearance G and N (Fig. 3).Therefore, the fluid of suction can easily leak to low voltage side by gap N between rim roll end and the mirror finishing surface and G.In addition, be provided with empty tip seal groove place at the first rim roll partial L F1 and LO1, compressed fluid by the empty tip seal groove space flow to rim roll around low voltage side, thereby fluid is in case suck and can leak.

Therefore, less fluid is inhaled into, and less fluid is discharged.Therefore can be with the fluid discharge pressure from 8kgf/cm ²Be increased to 10kgf/cm ²And do not cause excessive driving torque.

Compare with the tip seals of prior art by making, the tip seals that length reduces might be by simple structure, under the situation of drive motor rated power same as the prior art and identical motor revolutions per minute, and the increase discharge pressure.

The first rim roll partial L F1 and LO1 can suitably have 125 to 290mm the length of counting from rim roll ambient side edge, perhaps represent the first rim roll partial-length of starting at from ambient side edge 13b (21b) of rim roll by Sg, by the length of Sa representative from the ambient side rim roll edge of central side tip seals edge to the first rim roll part of tip seals, the scope of Sg/Sa is from 125/835mm to 290/835mm, and promptly 0.15 to 0.35.

The first rim roll partial L F1 and L01 preferably have 125 to 250mm the length of starting at from rim roll ambient side edge, and perhaps Sg/Sa is preferably in 0.15 to 0.3 the scope.

Basic embodiment also has following advantage, since in the end seal groove that the end of many vortex rim rolls forms, tip seals is housed so as with the relative vortex surface friction contact of mirror finishing, and at its discharge orifice side promptly in the end of the central side that rises to special high temperature at work of vortex mechanism, fix by jut 13e and 21e, thereby can eliminate following possibility, that is, bearing the flexible tip seals of heat that temperature variation causes in the work deviates from from its groove owing to extend through rim roll ambient side end.

In addition, though above-mentioned embodiment about scroll fluid discharging apparatus uses the running vortex and the stationary scroll of single rim roll, but this is the meaning of indefinite also, the present invention also can be used for following scroll fluid discharging apparatus, it uses two rim roll tapping equipments, on the both sides of running vortex body, have rim roll, also applicable to the two scroll fluid discharging apparatus that drive eddy typees that have an active and a driven vortex.

Example

Use equipment 1 (Fig. 2) is 8.5 π with the involute rim roll length setting from central side to ambient side, is that the tip seals of 835mm is cut away suitable ambient side length from extreme length, reaches 10kgf/cm so that measure when the pressurized air discharge pressure ²The time, air is from drainage rate L/min of discharge orifice (rise/minute) and motor torque.

Air drainage rate L/min and plotted curve that graphical representation shown in Figure 9 is measured as ordinate value, the length (mm) of abscissa representative cutting back tip seals.Graphical representation shown in Figure 10 reaches 10kgf/cm as the pressurized air discharge pressure of working as of ordinate value ²The time measured motor torque (KW), the length (mm) of abscissa representative cutting back tip seals.

As shown in Figure 9, might reduce the air drainage rate and the pressurized air discharge pressure is remained on 10kgf/cm by the empty tip seal groove space is set ²

By cutting away 125 to 290mm tip seals length, can obtain the air drainage rate of 350 to 320 liters/minute (L/min).Particularly, can obtain 340 to 350 liters/minute air drainage rate by cutting away 125 to 230mm tip seals length.

As shown in figure 10, by the empty tip seal groove space is set, might under the situation of drive motor torque same as the prior art, the pressurized air discharge pressure be remained on 10kgf/cm ²

125 to 290mm tip seals length is cut away scope corresponding to 3.76 to 3.56kw drive motor torque range.Therefore can select the drive motor of nominal drive torque in the above range.

As previously mentioned, according to the present invention, the motor that has same nominal power with prior art can be used for scroll fluid discharging apparatus, under the situation of motor revolutions per minute same as the prior art, make equipment increase the drainage rate of discharge pressure and compressed fluid by simple structure.

Claims (5)

1. scroll fluid discharging apparatus, it comprises a plurality of vortexs, have the rim roll that on vortex body, forms relatively on it, on periphery, be provided with an inlet hole and be used to suck fluid, be provided with a discharge orifice at the center and be used for exhaust fluid, fluid is compressed in the seal space that forms by driving, the end of above-mentioned vortex rim roll is by the relative vortex surface contact of tip seals with mirror finishing, seal space is along with the propelling from the described discharge orifice side of described inlet hole side direction, and its volume reduces gradually so that exhaust fluid.

Each described vortex rim roll that is bonded with each other has:

The first rim roll part that the tip seals that contacts with the relative vortex surface of mirror finishing is not set, thereby from the rim roll edge on the ambient side of rim roll in the prespecified range of central side, do not consider compressed fluid, form the part of the sky in the end seal groove; And

A second rim roll part that in described end seal groove, has tip seals, all the other rim roll range sections are adjacent with the described first rim roll part, and second rim roll part is extended towards central side rim roll edge, with the relative vortex surface contact of mirror finishing.

2. scroll fluid discharging apparatus as claimed in claim 1 is characterized in that: described empty tip seal groove part can be admitted the extended length of tip seals on the rim roll length direction.

3. scroll fluid discharging apparatus as claimed in claim 1, it is characterized in that: a tip seals is assemblied in the end seal groove that forms on every rim roll end, it is contacted with the relative vortex surface friction of mirror finishing, and the described tip seals discharge orifice side of heart end therein is fixed in rim roll.

4. scroll fluid discharging apparatus as claimed in claim 2 is characterized in that: described first rim roll partly covers 125 to 290mm the rim roll length of starting at from the ambient side edge of rim roll.

5. scroll fluid discharging apparatus as claimed in claim 2, it is characterized in that: it is 0.15 to 0.35 Sg/Sa that described first rim roll partly has scope, the first rim roll partial-length of Sg for starting at the edge of its ambient side from rim roll, Sa are that center edge from tip seals is to the length of rim roll at the edge of its ambient side.

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