CN1811134A - Axial sealer for scroll machine - Google Patents

Abstract

The axial sealer for scroll machine has one second scroll rotating around the first scroll to form one compression chamber with a low pressure chamber, a medium pressure chamber and a high pressure chamber in gradually increased pressure; and one piston acted with the work fluid pressure communicated to one of the chambers to force the second scroll to the first one so as to form sealing state. The piston has sliding direction guided with at least two guide pins in less inclination and high sealing effect.

Description

The axial sealer of scroll machine

Technical field

The axial sealer of scroll machine of the present invention, aim to provide in the scroll machine and improved in order to the seal arrangement that makes second scrollwork and first scrollwork form sealing effect, it mainly is to prop up second scrollwork towards the close actuating length place of first scrollwork at piston, be provided with at least two guide pillars that the piston glide direction formed guide function, reduce the skewness that piston slides, and then make two scrollworks reach preferable sealing effect.

Background technique

As shown in Figure 1, be the structure sectional view of general scroll machine and the axial sealer schematic representation of being commonly used, its machine mainly is by a moving scrollwork A1 fixed scroll A2 to be done the motion that rotates in the inside of casing, by moving scrollwork A1 fixed scroll A2 is formed cumulative low pressure chamber A31, the pressing chamber A3 of middle pressure chamber A32, hyperbaric chamber A33 of pressure from outside to inside, and then make refrigerant form compression effects by the volume change of pressing chamber A3; Wherein, a fixed scroll A2 and a skeleton A4 Joint, its moving scrollwork A1 promptly is located between the section of fixed scroll A2 and skeleton A4, and cooperate fixed scroll A2 is done the motion that rotates.

Again, because moving scrollwork A1 is to form pressing chamber axially (to reach radially) mode that engages with fixed scroll A2, therefore need have an axial seal effect between moving scrollwork A1 and the fixed scroll A2, reveal in compression process to avoid refrigerant, and then influence the volumetric efficiency of refrigerant, as shown in the figure, the axial sealer of commonly using is to form an annular groove A51 on skeleton A4, and be provided with a piston A5 in the annular groove A51, be provided with a pressure channel A6 between the main body of moving scrollwork A1 and this piston A5, this pressure channel A6 connects to moving scrollwork A1 and fixed scroll A2 wherein to press A32 place, chamber in one, and pass to annular groove A51 place by fixed scroll A2, with when the compressor operation, the working fluid pressure of this pressing chamber is directed to annular groove A51 by pressure channel A6, and this hydrodynamic pressure needs the pressure of inspiration(Pi) greater than machine, and be less than or equal to the exhaust pressure of machine, and piston A5 is formed an active force towards moving scrollwork A1 ejection, and then it is close towards fixed scroll A2 to prop up moving scrollwork A1, and make moving scrollwork A1 and fixed scroll A2 have the axial seal effect.

Constituted because moving scrollwork A1 and fixed scroll A2 axial seal active force are the active forces that endwisely slips by piston A5, so whether the piston A5 deflection that endwisely slips will directly influence moving scrollwork A1 and fixed scroll A2 axial seal effect; Yet, commonly use piston A5 and be subjected to working fluid pressure to do the time spent, can because piston A5 and skeleton A4 mutually between the fit crack excessive and deflection will influence moving scrollwork A1 and fixed scroll A2 axial seal effect; Moreover, though can utilize the fit gap that reduces piston A5 and skeleton A4,, the manufacturing cost of skeleton A4 and piston A5 will be increased to increase the stability that piston A5 slides, and skeleton A4 is cooperated be tending towards difficulty with the assembling of piston A5, and be unfavorable for the production of whole machine.

Summary of the invention

The axial sealer of scroll machine of the present invention, its machine is by second scrollwork first scrollwork to be done the motion that rotates, form the pressing chamber in the cumulative low pressure chamber of pressure from outside to inside, middle pressure chamber, hyperbaric chamber, it is close toward first scrollwork that other has a piston to be propped up second scrollwork by the working fluid pressure effect of one of above-mentioned pressing chamber of conducting in when running, makes two scrollworks be sealing state; Especially, piston is in propping up second scrollwork towards the close stroke place of first scrollwork, be installed with at least two guide pillars, reduce the skewness of piston slip by the guide function of guide pillar, and then make two scrollworks reach preferable sealing effect in order to the guidance piston glide direction.

Description of drawings

Fig. 1 is the structure sectional view of general scroll machine;

Fig. 2 is the structure sectional view of scroll machine of the present invention;

Fig. 3 is for practising the cross-sectional schematic that piston and guide groove are arranged;

Fig. 4 is the cross-sectional schematic of piston among the present invention and guide pillar;

Fig. 5 A, 5B, 5C are the schematic representation that habit has the different angle excursions that piston causes in endwisely slipping;

Fig. 6 A, 6B, 6C are the schematic representation of the different angle excursions that piston causes in endwisely slipping among the present invention;

Fig. 7 A is the structure sectional view of axial seal arrangement among the present invention;

Fig. 7 B is the operating state sectional view of axial seal arrangement among the present invention;

Fig. 8 is another embodiment's sectional view of configuration of pressure channel among the present invention;

Fig. 9 A is the structure sectional view of another embodiment of the present invention axial sealer;

Fig. 9 B is the operating state sectional view of another embodiment of the present invention axial sealer;

Figure 10 A is the structure sectional view of further embodiment of this invention axial sealer;

Figure 10 B is the operating state sectional view of further embodiment of this invention axial sealer;

Figure 11 A is the amplification view of ring among the present invention;

Figure 11 B is the amplification view of another embodiment of ring among the present invention;

Figure 11 C is the amplification view of the another embodiment of ring among the present invention;

Figure 12 is the different R and the function relation figure of angle excursion.

[figure number explanation]

A1 moving scrollwork 30 pressing chambers

A2 fixed scroll 31 low pressure chambers

Press the chamber in the A3 pressing chamber 32

A31 low pressure chamber 33 hyperbaric chambers

Press chamber 40 skeletons among the A32

A33 hyperbaric chamber 50 pistons

A4 skeleton 51 annular grooves

A5 piston 60 pressure channels

A51 annular groove 70 guide pillars

A6 pressure channel 71 bolts

10 second scrollworks, 80 post holes

20 first scrollworks, 90 rings

21 locking bolts, 91 black boies

Embodiment

For the clear structure of the present invention of your auditor is formed, and the overall operation mode, cooperate graphic being described as follows now:

The axial sealer of scroll machine of the present invention, the basic structure of its whole scroll machine is formed as shown in Figure 2, be to do the motion that rotates by 10 pairs first scrollworks 20 of one second scrollwork equally in the inside of casing, form the pressing chamber 30 in the cumulative low pressure chamber 31 of pressure from outside to inside, middle pressure chamber 32, hyperbaric chamber 33 by 10 pairs first scrollworks 20 of second scrollwork, and then change by the volume of pressing chamber 30 and to make refrigerant form compression effects; Wherein, the periphery of first scrollwork 20 is to be locked mutually with a skeleton 40 by at least two locking bolts 21, and promptly is located in the annular groove 51 of skeleton 40 in order to the piston 50 that forms the axial seal effect.

The size of the angle excursion that is caused in the time of can endwisely slipping by the piston 50 that piston A5 and this case use are commonly used in Fig. 3, Fig. 4, Fig. 5 and Fig. 6 explanation, and Fig. 3 is that angle excursion is θ when commonly using piston A5 and endwisely slip ₂-θ ₁, wherein:

${\mathrm{\θ}}_2-{\mathrm{\θ}}_1={\sin }^{-1}\frac{(R+\mathrm{\δ})}{\√(R^2+h^2)}-{\sin }^{-1}\frac{R}{\√(R^2+h^2)}$

$={\sin }^{-1}\left(\frac{(R+\mathrm{\δ})h-R\√(h^2-2\mathrm{R\δ}-{\mathrm{\δ}}^2)}{R^2+h^2}\right)$

【sin ^-1x-sin ^-1y＝sin ^-1〔x√(1-y ²)-y√(1-x ²)〕，xy≥0】

R: the deflection radius of piston, h: half height of piston, δ: the gap of piston and guide groove

And Fig. 4 is that angle excursion was θ when piston 50 endwisely slipped in this case ₂-θ ₁, wherein:

${\mathrm{\θ}}_2-{\mathrm{\θ}}_1={\cos }^{-1}\frac{(R-\mathrm{\δ})}{\√(R^2+h^2)}-{\cos }^{-1}\frac{R}{\√(R^2+h^2)}$

$={\cos }^{-1}\left(\frac{(R-\mathrm{\δ})R+h\√(h^2+2\mathrm{R\δ}-{\mathrm{\δ}}^2)}{R^2+h^2}\right)$

【cos ^-1x-cos ^-1y＝cos ^-1〔xy+√(1-x ²)·√(1-y ²)〕，x＜y】

R: the deflection radius of piston, h: half height of piston, δ: the gap of piston guide hole and guide pillar

Please be simultaneously with reference to Fig. 5 and shown in Figure 6, be illustrated under the identical h and δ, (R=20 when R increases, R=30, R=45), commonly use the different angle excursion of piston and this case piston, wherein, the angle excursion of commonly using piston can increase with R, the angle excursion of this case then can reduce, making shown in chart 1 further with R and angle excursion, wherein, commonly using the angle excursion that piston A5 caused when endwisely slipping increases and increases fast with R, and to a certain R place and can disperse (that is piston can rotate without limits arbitrarily) in annular groove, and the angle excursion that use this case piston 50 is caused is stablized with the R increase and reduced.

Wherein, first scrollwork 20 is to be provided with a pressure channel 60 with the main body of skeleton 40, please cooperate with reference to Fig. 7 A simultaneously, (Fig. 7 A) shown in the B is that this scroll machine is a state of rest, Fig. 7 B is that this scroll machine is an operating condition) this pressure channel 60 be connect to second scrollwork 10 and first scrollwork 20 wherein in one pressure stop up 32 places, and pass to annular groove 51 places by first scrollwork 20, the working fluid pressure of this pressing chamber 30 is directed to annular groove 51 by this pressure channel 60, and piston 50 is formed an active force towards 10 ejections of second scrollwork, and then it is close toward first scrollworks 20 to prop up second scrollwork 10, make two scrollworks be sealing state, certainly the configuration of this pressure channel 60 also can be as shown in Figure 8, second scrollwork 10 is to be provided with a pressure channel 60 with the main body of piston 50, this pressure channel 60 is to connect to second scrollwork 10 and first scrollwork 20 pressure 32 places, chamber in wherein, pass to annular groove 51 places by second scrollwork 10, equally piston 50 is formed an active force towards 10 ejections of second scrollwork.

Especially, piston 50 is in propping up second scrollwork 10 towards the close stroke place of first scrollwork 20, be to be installed with at least two guide pillars 70 in order to guidance piston 50 glide directions, in the embodiment of Fig. 7 A, B, guide pillar 70 is locked wearing of bolt 21 and is fixedly arranged between the section of first scrollwork 20 and skeleton 40, the then corresponding post hole 80 that is provided with of the periphery of piston 50 wears mutually with guide pillar 70, guide function by guide pillar 70 reduces the skewness that piston 50 slides, and then makes two scrollworks reach preferable sealing effect; Certainly, the configuration mode of its guide pillar 70 can also be as Fig. 9 A, (Fig. 9 A is that this scroll machine is a state of rest shown in the B, Fig. 9 B is that this scroll machine is an operating condition), be to be located at the side that skeleton 40 and piston 50 fit by bolt 71 locking, the then corresponding post hole 80 that is provided with of the main body of piston 50 wears mutually with guide pillar 70, or be as Figure 10 A, (Figure 10 A is that this scroll machine is a state of rest shown in the B, Figure 10 B is that this scroll machine is an operating condition), be that periphery in first scrollwork 20 and piston 50 is provided with the post hole 80 that wears for guide pillar 70 in the position that wears of locking bolt 21, its guide pillar 70 promptly is linked between first scrollwork 20 and the piston 50 by wearing of bolt 21 of locking, make piston 50 be subjected to the pressure in the annular groove 51 and form an active force towards 10 ejections of second scrollwork, and then prop up second scrollwork 10 and first scrollwork 20 up slides, and has effect equally by guide pillar 70 limited piston 60 glide directions, increasing the axial seal effect of second scrollwork 10 and first scrollwork 20, and keep the second scrollwork 10 not deflection that turns round.

Moreover, whole axial sealer is further to be provided with a ring 90 in annular groove 51, shown in Figure 11 A, this ring 90 is that one is located on the piston 50, be provided with the black box 91 that forms airtight effect with the inwall of annular groove 51 in addition in the inside and outside circle position of ring 90, making working fluid pressure be acted on really between the air chamber that annular groove 51 and ring 90 constituted, and form the active force that piston 50 slides towards moving scrollwork 10; Certainly, its ring 90 can also be shown in Figure 11 B, for direct one is located on the skeleton 40, or is shown in Figure 11 C, and independent ring 90 is located in the annular groove 51 in addition, can reach the effect that makes piston and skeleton fit equally.

As mentioned above, the axial sealer of scroll machine of the present invention, second scrollwork and another preferable feasible axial sealer of first scrollwork of scroll machine are provided, can increase the axial seal effect of second scrollwork and first scrollwork, more help the production of whole scroll machine, so offer the application of patent in accordance with the law; Yet, above implementation and graphic shown in, be one of preferred embodiment of the present invention, be not to limit to the present invention with this, be with, approximate with structure of the present invention, device, feature etc. such as, identical, all should belong to of the present invention founding within purpose and the claim.

Claims (9)

1, a kind of axial sealer of scroll machine, its scroll machine is by second scrollwork first scrollwork to be done the motion that rotates, form the pressing chamber in the cumulative low pressure chamber of pressure from outside to inside, middle pressure chamber, hyperbaric chamber, other has a piston to press the working fluid pressure effect of one of chamber in when running is above-mentioned by conducting and to prop up second scrollwork close toward first scrollwork, makes two scrollworks be sealing state; It is characterized in that:

This piston is installed with at least two guide pillars in order to the guidance piston glide direction in propping up second scrollwork towards the close stroke place of first scrollwork, reduces the skewness of piston slip by the guide function of guide pillar, and then makes two scrollworks reach preferable sealing effect.

2, the axial sealer of scroll machine as claimed in claim 1, wherein, the periphery of this first scrollwork is to be locked mutually with a skeleton by at least two locking bolts, this second scrollwork and piston promptly are located between the section of first scrollwork and skeleton, this guide pillar is then locked wearing of bolt and is fixedly arranged between the section of first scrollwork and skeleton, and the then corresponding post hole that is provided with of the periphery of this piston wears mutually with guide pillar.

3, the axial sealer of scroll machine as claimed in claim 1, wherein, the periphery of this first scrollwork is to be locked mutually with a skeleton by at least two locking bolts, this second scrollwork and piston promptly are located between the section of first scrollwork and skeleton, this guide pillar is to be located at the side that skeleton and piston fit by bolt locking, and the then corresponding post hole that is provided with of the main body of this piston wears mutually with guide pillar.

4, the axial sealer of scroll machine as claimed in claim 1, wherein, the periphery of this first scrollwork is to be connect mutually with a skeleton by at least two locking bolts, this second scrollwork and piston promptly are located between the section of first scrollwork and skeleton, the periphery of this first scrollwork and this piston is provided with the post hole that wears for guide pillar in the position that wears of locking bolt, and this guide pillar promptly is linked between first scrollwork and the piston by wearing of bolt of locking.

5, the axial sealer of scroll machine as claimed in claim 1, wherein, the main body of this first scrollwork and this skeleton is provided with a pressure channel, this pressure channel is to connect to second scrollwork and first scrollwork wherein to press the chamber to locate in one, and be wound to annular groove by first whirlpool, working fluid pressure with pressure chamber in will being somebody's turn to do by the pressure channel is directed in the annular groove, and piston is formed an active force towards the second scrollwork ejection.

6, the axial sealer of scroll machine as claimed in claim 1, wherein, the main body of this second scrollwork and this piston is provided with a pressure channel, this pressure channel is to connect to second scrollwork and first scrollwork wherein to press the chamber to locate in one, be wound to the annular groove place by second whirlpool, working fluid pressure with pressure chamber in will being somebody's turn to do by the pressure channel is directed in the annular groove, and piston is formed an active force towards the second scrollwork ejection.

7, as the axial sealer of claim 5 or 6 described scroll machines, wherein, this skeleton is then corresponding to be provided with and the annular groove ring of fit mutually, and this ring is that one is located on the piston, is provided with the black box that forms airtight effect with the inwall of annular groove in addition in the inside and outside circle position of ring.

8, as the axial sealer of claim 5 or 6 described scroll machines, wherein, this skeleton is integrally formed with a ring, is provided with the black box that forms airtight effect with the inwall of annular groove in addition in the inside and outside circle position of this ring.

9, as the axial sealer of claim 5 or 6 described scroll machines, wherein, this ring is sheathed in the annular groove in addition, and is provided with the black box that forms airtight effect with the inwall of annular groove in the inside and outside circle position of this ring.

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